CN103619294B - Absorbent commodity - Google Patents

Abstract

The present invention relates to a kind of absorbent commodity, it has the positive dough sheet of the liquid permeability being configured at side, skin contact face, the back sheet being configured at side, non-skin contact face and the absorber be arranged between this two panels, above-mentioned positive dough sheet is made up of non-woven fabrics, above-mentioned absorber has absorbent core and covers the emulsion sheet of this absorbent core, in the side, non-skin contact face of above-mentioned positive dough sheet, be adjacent to be distributed multiple to side, skin contact face recessed back side recess of accompanying, above-mentioned emulsion sheet enters into this back side recess, between this emulsion sheet entered and above-mentioned absorbent core, there is spatial portion.

Description

Absorbent commodity

Technical field

The present invention relates to the absorbent commodities such as disposable diaper, urine absorbent pad, sanitary napkin, light incontinence pad.

Background technology

In the absorbent commodities such as disposable diaper, constantly improve material and the structure of each parts, to realize the raising of its function and wearing feeling.Such as, also seek above-mentioned improvement for as the positive dough sheet of parts and absorber and develop, particularly the functional article that have various raising corresponding to behaviour in service or type of goods of motion recently.In addition, in order to obtain good wearing feeling, carry out keeping the skin contact part of diaper and the distance of absorber to increase the research of the component thickness of outward appearance always.Thereby, it is possible to suppress the humidity of returning in liquid and diaper to side, article skin contact face to rise.Specifically, have the article being laminated with sublayer under positive dough sheet or by embossing etc. align dough sheet carry out concavo-convex figuration article, make this figuration sheet engage the article etc. fixed with other non-woven fabric plate by crimping etc.

Disclose a kind of absorber itself in patent documentation 1 be close to positive dough sheet and form the absorbent commodity of concaveconvex shape.Thus, the inner mobility that can improve liquid and realize soft sense of touch is thought.Disclose in patent documentation 2 a kind of in the excretion opposed area of sanitary napkin absorber there are the article of the multiple recesses from side, skin contact face to inside.In this sanitary towel, the surface area of the side, skin contact face of absorber becomes large, catches liquid and internally introduce with recess, therefore, thinks the diffusion that suppresses liquid in side, skin face and make an absorbability excellence.This realizes due to the shape improving absorber itself.

Disclose a kind of conformability of the waist in order to improve diaper, breathability and flexibility in patent documentation 3 and form the article of the waist gauffer be made up of composite extensible in the veutro portion of diaper and drosal part.At this composite extensible, the multiple elastomeric elements between two synusia being configured at waist portion are set to on-fixed beyond width end, and do not hinder retractility.By above-mentioned tightening up of elastomeric element, the two sides of two synusia is given prominence to respectively to rightabout, become the pleat of multiple long side direction.Thereby, it is possible to realize breathability or flexibility.

Disclose a kind of diaper in patent documentation 4, the dorsal part region that it is becoming waist arranges a pair waist alar part stretched out to width foreign side, and in this waist alar part, side is provided with waist elongated area.Thus, think and in the mode of the girth difference of supplementary waist and hip circumference, elongated area stretched and improve conformability.

Disclose in patent documentation 5 and a kind ofly to have by the positive dough sheet of the two-layer sag and swell formed.This positive dough sheet has and is formed with multiple protuberance, the middle section of recess and the lateral region of these middle section both sides.By utilizing hot-rolling to heat the recess of the upper synusia of above-mentioned middle section and lower synusia, pressurize, make two-layer firmly fixing.Thus, above-mentioned positive dough sheet has the protuberance of height in middle section stable maintenance, has higher time liquid preventive.And, think and utilize liquid can obtain higher anti-leakage to the lateral region that the movement of absorber is good.

In addition, a kind of two-layer positive dough sheet formed by having the concaveconvex shape utilizing discaling roll to be formed is disclosed in patent documentation 6.Think and make breathability and resiliency excellence by the liquid flow of drain recess minimizing in side, skin contact face utilizing and be located at the side, skin contact face of above-mentioned positive dough sheet.

Prior art document

Patent documentation

Patent documentation 1:(Japan) JP 2009-119022 publication

Patent documentation 2:(Japan) JP 2008-18048 publication

Patent documentation 3:(Japan) JP 2008-132023 publication

Patent documentation 4: No. 2009/104581st, International Publication

Patent documentation 5:(Japan) JP 2009-118920 publication

Patent documentation 6:(Japan) JP 2009-89965 publication

Summary of the invention

The invention provides a kind of absorbent commodity, it is characterized in that, positive dough sheet and other parts with back side recess combine in interactional mode.

The invention provides a kind of absorbent commodity, it has the positive dough sheet of the liquid permeability being configured at side, skin contact face, the back sheet being configured at side, non-skin contact face and the absorber arranged between these two sheets, in this absorbent commodity, above-mentioned positive dough sheet is made up of non-woven fabrics, above-mentioned absorber has absorbent core and covers the emulsion sheet of this absorbent core, in the side, non-skin contact face of above-mentioned positive dough sheet, multiple back side recess to side, skin contact face depression is adjacent to be distributed.Above-mentioned emulsion sheet enters into this back side recess, between this emulsion sheet entered and above-mentioned absorbent core, have spatial portion.In addition, be equipped not to be situated between in the long side direction end foreign side of above-mentioned absorber and establish this absorber and the one variant part of the convex formed by above-mentioned positive dough sheet and above-mentioned back sheet.In addition, between above-mentioned positive dough sheet and above-mentioned absorber, be equipped with sublayer, the back side protuberance of this sublayer and the above-mentioned positive dough sheet adjacent with above-mentioned back side recess abuts, and in this part, the fibre density of sublayer is higher than other parts.

About above-mentioned and further feature of the present invention and advantage, can be suitably clear and definite further according to following record with reference to accompanying drawing.

Accompanying drawing explanation

Fig. 1 is local excision's axonometric chart of the disposable diaper schematically showing the preferred embodiment as absorbent commodity of the present invention from direction, skin contact face.

Fig. 2-1(a) be the sectional view in the II-II line cross section shown in Fig. 1, b () is that (c) is the close-up sectional view of the configuration relation schematically showing positive dough sheet and emulsion sheet by the close-up sectional view that represents of the cross section enlarged partial schematic of positive dough sheet ground.

Fig. 2-2 is the replacement accompanying drawing photos in the cross section of the disposable diaper of shooting present embodiment.

Fig. 3 is the key diagram of the relation schematically showing the positive dough sheet of back side recess, emulsion sheet and absorbent core.

Fig. 4 is the axonometric chart utilizing partial cross section to be shown schematically in the positive dough sheet in the diaper of embodiment.

Fig. 5 is by Fig. 2-1(a) institute's uniform section a part amplify represent close-up sectional view.

Fig. 6 schematically shows the back side recess of side, non-skin contact face of the positive dough sheet of top view and the key diagram of the relation of back side protuberance.

Fig. 7 is the replacement accompanying drawing photo in the cross section of the positive dough sheet of shooting present embodiment

Fig. 8 is the key diagram of the variation of the cross sectional shape representing back side recess.

Fig. 9 is the key diagram of the variation of the cross sectional shape representing positive dough sheet.

Figure 10 is the key diagram of the variation representing absorbent core.

Figure 11 is the key diagram of the disperse state of the liquid schematically showing embodiment 1 and 2 and comparative example 1 and 2.

Figure 12 is the key diagram of the disperse state of the liquid schematically showing embodiment 1 and 2 and comparative example 1 and 2.

Figure 13 is local excision's axonometric chart of the disposable diaper of another the preferred embodiment (the second embodiment) schematically shown from direction, skin contact face as absorbent commodity of the present invention.

Figure 14 is the partial enlargement excision axonometric chart of the end laminated section of the disposable diaper schematically amplifying expression second embodiment.

Figure 15 (A) is the sectional view in the A-A line cross section of Figure 14, and (B) is the sectional view in the B-B line cross section of Figure 14.

Figure 16 is by the close-up sectional view that represents of the cross section enlarged partial schematic of the end laminated section of Figure 15 ground.

Figure 17 is the key diagram of the top at the interface of the one variant part schematically showing Figure 15, turning point, steering direction.

That Figure 18-1 is the variation of the end laminated section representing the second embodiment, corresponding to Figure 15 and 17 figure.

That Figure 18-2 is another variation of the end laminated section representing the second embodiment, corresponding to Figure 15 and 17 figure.

That Figure 18-3 is another variation of the end laminated section representing the second embodiment, corresponding to Figure 15 and 17 figure.

Figure 19 is the plane graph of another preferred example of the planar alignment of the one variant part of the end laminated section schematically showing the second embodiment.

Figure 20 is the elongation of the end laminated section representing the second embodiment and the key diagram of flexible state.

Figure 21 is the close-up sectional view in the cross section of the end laminated section schematically showing the positive dough sheet using Fig. 4.

Figure 22 represents in the end laminated section of the second embodiment, is provided with the close-up sectional view of the state of non-woven fabric plate between positive dough sheet and back sheet.

Figure 23 is the key diagram of the cross sectional shape of the end laminated section schematically showing embodiment 21 and the respective test body of comparative example 21 ~ 23.

Figure 24 is the replacement accompanying drawing photo of the state after representing the dripping of embodiment 21 and the respective test body of comparative example 21 ~ 23 and after tilting.

Figure 25 is local excision's axonometric chart of the disposable diaper of the another preferred embodiment (the 3rd embodiment) schematically shown from direction, skin contact face as absorbent commodity of the present invention.

Figure 26-1(a) be the sectional view in the II-II line cross section shown in Figure 25, (b) is the close-up sectional view of the configuration relation schematically showing positive dough sheet and sublayer.

Figure 26-2 is the replacement accompanying drawing photos in the cross section of the disposable diaper of shooting the 3rd embodiment.

Figure 27 is the key diagram of relation schematically showing the positive dough sheet of back side protuberance, sublayer and absorber.

A part for institute's uniform section of Figure 26-1 is amplified the close-up sectional view represented by Figure 28.

Figure 29 is the key diagram of the variation of the cross sectional shape representing positive dough sheet.

Figure 30 is the replacement accompanying drawing photo of the state after the test of the positive dough sheet of shooting embodiment 31 is implemented.

Figure 31 is the replacement accompanying drawing photo of the state after the test of the positive dough sheet of shooting comparative example 31 is implemented.

Symbol description

1 positive dough sheet

2 back sheets

21 protrusions (back sheet 2 enters into the part of the back side, the end recess 7w of positive dough sheet 1)

3 absorbers

31 absorbent cores

32,33 emulsion sheets

4 lateral plates

5 end laminated sections

51 one variant parts

52 one skin side variant parts

53 one non-skin side variant parts

6 sublayers

61 compact parts

62 parts of rarefaction

7 back side recesses

Back side recess on 7v absorber

The back side, 7w end recess (back side recess of the positive dough sheet 1 in end laminated section 5)

71 inlet portions (emulsion sheet 32 enters into the part of the back side recess 7 of positive dough sheet 1)

72 spatial portions

Spatial portion in 72v absorber

72w recess spatial portion (on sublayer spatial portion)

73 buffer gaps portion

74 junction surfaces

8 back side protuberances

Back side recess on 8v absorber

The back side, 8w end protuberance (back side protuberance of the positive dough sheet 1 in end laminated section 5)

78 front protuberances

88 front protuberances

10,20,30 disposable diapers

Detailed description of the invention

The invention provides a kind of absorbent commodity, it improves the absorbent properties of existing absorbent commodity further, even if the discharged liquid had repeatedly or a large amount of discharged liquid, also liquid can be suppressed in the diffusion of positive dough sheet and promptly suck liquid to make it in absorber diffusion inside, thus effectively absorb maintenance liquid.In addition, the present invention also provides a kind of raising not being provided with the absorbent commodity of anti-leakage of part of absorber.In addition, the invention provides a kind of absorbent commodity, it increases and higher liquid imbedibility of obtaining and prevent back on the basis of fluidity at the thickness produced based on stacking part by prior art, also suppress back the humidity of liquid or article inside, and the liquid residue of the side, issuable skin face due to using state or excretion etc. can be reduced further, further alleviate the burden to wearer skin.

Below, based on it preferred embodiment (the first ~ three embodiment) be described in detail with reference to accompanying drawing.

In addition, for the back side of the present invention recess 7 and back side protuberance 8, when distinguishing in the first embodiment and the second embodiment, with regard to its equipping position, particularly sometimes also two positions of the first embodiment to be called on absorber back side protuberance 8v on back side recess 7v and absorber, sometimes also two positions of the second embodiment to be called the back side, end recess 7w and the back side, end protuberance 8w.On the other hand, with regard to its equipping position, the back side recess 7 of the 3rd embodiment is the same with the first embodiment with back side protuberance 8, also referred to as back side protuberance 8v on recess 7v in the back side on absorber and absorber.In addition, sometimes also do not distinguish, be only called back side recess 7 and back side protuberance 8.

In addition, for spatial portion 72 of the present invention, when distinguishing in the first embodiment and the 3rd embodiment, with regard to its parts are formed, also the spatial portion 72 of the first embodiment is called spatial portion 72v in absorber, also the spatial portion 72 of the 3rd embodiment is called spatial portion 72w on recess spatial portion 72w or sublayer.In addition, sometimes also spatial portion 72 is only called.

［ the first embodiment ］

Fig. 1 is local excision's axonometric chart of the disposable diaper of the preferred embodiment (the first embodiment) schematically shown from direction, skin contact face as absorbent commodity of the present invention.Diaper shown in this figure is banding pattern disposable diaper, represents with the state that the diaper slight curvature of the state launched by plane earth is observed from inner side (side, skin contact face).

First, the summary of the above-mentioned disposable diaper 10 of the first embodiment is described.

The disposable diaper 10 of the first embodiment has: the back sheet 2 be configured at the positive dough sheet 1 of the liquid permeability of side, skin contact face, being configured at side, non-skin contact face and the absorber 3 arranged between them.Absorber 3 has absorbent core 31 and emulsion sheet 32 and 33.Skin contact side and the non-skin contact side of absorbent core 31 are smooth shape.This side, skin contact face is covered by emulsion sheet 32, and side, non-skin contact face is covered by emulsion sheet 33, and this two emulsion sheet and absorbent core 31 are engaged by phased manner by spraying hot-melt adhesive etc.In addition, the width end of two emulsion sheets is engaged mutually in the both side edges foreign side of absorbent core.

Back sheet 2 in the deployed state its both side edges has the shape of the general hourglass of tightening up to the inside at long side direction (Y-direction) central part, form the profile of diaper.About the profile of this diaper 10, be divided on long side direction (Y-direction) as its deployed condition: the veutro portion F being configured at wearer veutro, the drosal part R being configured at dorsal part and the crotch bottom C be positioned between the two.Crotch bottom C comprises the region (excretory portion corresponding region) corresponding with the excretory portion of wearer.Back sheet 2 can be made up of 1 sheet, also can form by multiple.The mode overleaf sheet 2 covering the upside of this absorber 3 with positive dough sheet 1 is equipped with positive dough sheet 1 and absorber 3.Positive dough sheet 1 and absorber 3 are respectively the width roughly oblong-shaped narrower than back sheet 2, and their long side direction and the long side direction of back sheet 2 are as one man configured.And then, a pair lateral plate 4,4 is laminated with from the long side direction both side edges of positive dough sheet 1 to width (X-direction) foreign side.Be formed with in the end by width central authorities of lateral plate 4 the leakproof pad 41 being configured with elastomeric element, be formed with the leg creases 42 being configured with elastomeric element in width foreign side respectively.Thus, the side leakages such as the liquid of the femoral joint part that can effectively prevent the motion of infant etc. from causing.In the diaper 10 of present embodiment, also can functional structural portion or sheet material etc. be set further.

Be formed at the veutro portion F of diaper 10 and drosal part R and be laminated with lateral plate 4 and back sheet 2, the dorsal part alar part 17 stretched out to width foreign side and veutro alar part 18.Dorsal part alar part 17 is provided with magic tape 19.This band 19 is attached to the band attaching portion (not shown) being located at veutro alar part 18, fixing diaper can be dressed.Now, by the bending to the inside at leisure of diaper long side direction central authorities, dress throughout to underbelly mode along the buttocks from infant with absorber 3.Thus, Excreta is made to absorb maintenance by absorber 3 exactly.

The details such as the material of above-mentioned positive dough sheet 1, back sheet 2, absorbent portion 3 are carried out aftermentioned, but in the present embodiment, be delivered to the viewpoint of absorber and the comfort level of sensation from the view point of the body fluid of promptly absorbing and excreting, positive dough sheet 1 uses hydrophilic hot-wind nonwoven cloth to be formed.In addition, as back sheet 2, be made up of the parts of the difficult permeability of liquid, such as, use there is breathability and liquid not through the formation such as poisture-penetrability film.The difficult permeability of above-mentioned liquid of the present invention be instigate liquid be difficult to through character, comprise: water proofing property, hydrophobicity and opaque liquid.About absorber 3, absorbent core 31 uses the raw material be made up of paper pulp fiber and superabsorbent polymer to be formed, and emulsion sheet 32 and 33 uses the raw material that hydrophilic is higher to be formed.

In the present invention, unless otherwise specified, be then the face of the side with human contact is called skin side or skin contact face or front, the face with its opposition side be called non-skin face or non-skin contact face or the back side.In two faces, the side near skin side or its extending direction are called side, skin face, side, skin contact face or face side, the side near non-skin face or its extending direction are called side, non-skin face, non-side, skin contact face or rear side.The direction being positioned at the front side of human body when dressing is called front, and using its end as leading section, the direction being positioned at rear side is called rear, and its end is described as rearward end.The front of absorbent commodity or the normal direction at the back side are called thickness direction, are measured and be called thickness.And then, the direction from veutro portion throughout crotch bottom to drosal part during the overlooking of absorbent commodity is called longitudinal direction or long side direction, the direction orthogonal with this vertical (long limit) direction is called width.In addition, above-mentioned longitudinal direction is typically consistent with the fore-and-aft direction of human body under wearing state.

Then, with reference to Fig. 2-1 and Fig. 2-2, the cross sectional shape of diaper 10 is described.(a) of Fig. 2-1 is the sectional view in the II-II line cross section shown in figure l, b () is the close-up sectional view schematically shown by the cross section partial enlargement of positive dough sheet, (c) is the close-up sectional view of the configuration relation schematically showing positive dough sheet and emulsion sheet.Fig. 2-2 is the photos to the replacement accompanying drawing that the cross section of the disposable diaper 10 of present embodiment is taken, and represents that this cross section is overall, wherein, by back side recess 7v on the recess 7(absorber of the back side with the photo of central authorities) 1 be amplified in lower right and represent.In the enlarged drawing of this back side recess 7, be positioned at the spatial portion 72(absorber spatial portion 72v of the part (inlet portion 71) the entered below of emulsion sheet) be expressed as the part of being surrounded by broken circle.In addition, absorbent core 31 is the fiber aggregates be made up of paper pulp fiber etc., the fluctuating that the flanged outward fibre pick of its outer surface tool etc. are fine.Therefore, Fig. 2-1(a) in, the approximate range of the profile of the profile of absorbent core 31 as fiber aggregate is represented (identical in Fig. 3 is with 5) with double dot dash line.

As Fig. 2-1(a) shown in, the cross sectional shape of diaper 10 is that positive dough sheet 1 and emulsion sheet 32 have concaveconvex shape relative to absorbent core 31.By this shape, particularly based on the structure of back side recess 7 and the parts below it, the lifting of the raising of following liquid imbedibility and the liquid diffusibility of absorber inside and liquid immobilization speed can be realized.With reference to Fig. 2-1(b) and (c), further the cross sectional shape of this positive dough sheet 1 and emulsion sheet 32 is described.

As Fig. 2-1(b) shown in, be formed from non-skin contact face side (z in the side, non-skin contact face of positive dough sheet 1 ₂) to skin contact face side (z ₁) back side recess 7 that caves in.This back side recess 7 with adjacent roughly at equal intervals and be periodically configured with multiple, makes the side, non-skin contact face of positive dough sheet 1 become concaveconvex shape by this configuration in the in-plane direction.That is, become from skin contact face side (z between the recess of each back side ₁) to non-skin contact face side (z ₂) outstanding back side protuberance 8.Here so-called " back side recess be adjacent to be distributed multiple " refers to that the aftermentioned top 7a of the concave bottom becoming back side recess 7 and adjacent 7a disperses to arrange across bottom 7c, thus, make each back side recess 7 to configure to the mode of all directions diffusion when overlooking.Not be configured with the depression of multiple strip abreast.In addition, in present embodiment, be formed with front protuberance 78 in the side, skin contact face of the positive dough sheet 1 corresponding with this back side recess 7, be formed with front recess 88 in the side, skin contact face of the positive dough sheet l corresponding with back side protuberance 8.

As Fig. 2-1(c) and Fig. 2-2 shown in, back side recess 7v on the back side recess 7(absorber of positive dough sheet 1) in be formed with the part protuberance of the emulsion sheet 32 of the side, skin contact face covering absorber 3 and the inlet portion 71 that enters.As shown in the diaper 10 of present embodiment, when emulsion sheet 32 is engaged by hot-melt adhesive discontinuously with absorbent core 31, preferred emulsion sheet 32 swells and becomes inlet portion 71 between this bonding agent.And then, as Fig. 2-1(c) and Fig. 2-2 shown in, back side recess 7v on recess 7(absorber overleaf) in emulsion sheet 32 and absorbent core 31 between be formed with spatial portion 72v in spatial portion 72(absorber).This spatial portion 72 being formed with the inlet portion 71 produced by the protuberance of emulsion sheet 32.Inlet portion 71,71 ... penetration depth (h ₂) can be even, not only can there is the darker inlet portion as shown in Fig. 2-2, also can there is the cup depth (h becoming back side recess 7 ₁) penetration depth (h of > inlet portion 71 ₂) inlet portion (with reference to Fig. 2-1(c)).In this back side recess 7, preferably between positive dough sheet 1 and emulsion sheet 32, also form gap, become the buffer gap portion 73 that the impact from the power of positive dough sheet 1 side is relaxed.

Back side recess 7 is depressions of the non-skin contact side of positive dough sheet 1, and is that the sidewall portion 7b from top 7a towards bottom 7c formed by the positive dough sheet 1 caved in along this is formed (with reference to Fig. 2-1(b)).Such back side recess 7 is made up of the non-woven fabrics of softness, therefore, geometrics completely may not necessarily be defined as, the cross sectional shape of the back side recess 7 that sidewall portion 7b is formed becomes and is similar to parabolical shape, and the spatial form of this back side recess 7 becomes and is similar to top 7a and is with the circular cone of circular arc or the shape of the frustum of a cone.In addition, the three-dimensional shape of back side recess 7 can adopt any recess shapes of the shape being not limited to present embodiment, such as, also can be cone or the such shape of cylinder.As shown in the embodiment, when the side, skin contact face of positive dough sheet also has concaveconvex shape, coordinate the shape of shape preferably as cone (circular cone, the frustum of a cone, pyramid, the frustum of a pyramid, oblique cone etc.) of side, skin contact face.

In the present embodiment, top 7a is the extreme higher position (Z in the non-skin contact side of the positive dough sheet 1 of the inwall of the solid space forming back side recess 7 ₁direction) position, bottom 7c is the extreme lower position (Z in the same space ₂direction) position.Therefore, recess 7 is with the concaveconvex shape of back side protuberance 8 alternate repetition overleaf, and the bottom 7c of back side recess is consistent with the top 8a of back side protuberance 8.In addition, the top 7a of above-mentioned back side recess 7 or top 8a of the 7c(back side, bottom protuberance) represent as the summit on curved surface, but be not limited to this, its periphery also can be plane.In this case, top 7a can be decided to be place the highest in the central point of this plane or plane, and the top 8a of the 7c(back side, bottom protuberance) place minimum in the central point of this plane or plane can be decided to be.In this definition, the degree of depth (h of above-mentioned back side recess 7 ₁) refer to the difference of height of the non-skin contact side of positive dough sheet 1, and be the distance (with reference to Fig. 2-1(b) from top 7a to bottom 7c).In addition, equally, the degree of depth (h of above-mentioned inlet portion 71 ₂) be side, skin contact face from bottom 7c to inlet portion 71 extreme higher position between distance (with reference to Fig. 2-1(c)).

Then, with reference to Fig. 3 further to back side recess 7v on the back side recess 7(absorber of the basic structure part as present embodiment) be described in detail, and carry out describing to its action effect.Fig. 3 schematically shows back side recess 7v on the recess 7(absorber of the back side) in the key diagram of relation of positive dough sheet 1, emulsion sheet 32 and absorbent core 31.In Fig. 3, represent with (a) and (b) two kinds of patterns.Be the degree of depth (h of inlet portion 71 in the pattern of (a) ₂) than the cup depth (h of back side recess 7 ₁) shallow (h ₂< h ₁), with spatial portion 72v in spatial portion 72(absorber) together with formed there is the degree of depth (h ₃) buffer gap portion 73.Be (h in the pattern of (b) ₁=h ₂), although be formed with spatial portion 72, do not form buffer gap portion 73.

In arbitrary pattern in (a) and (b) of Fig. 3, back side recess 7v on the recess 7(absorber of the back side) all from the non-skin contact face side z of positive dough sheet 1 ₂towards skin contact face side z ₁formed, and be formed with the inner space of the absorber 3 of the liquid retainability below positive dough sheet in the position near wearer skin.Thus, liquid internally the shortening through distance of space, effective to raising liquid-absorbent.And then because recess 7 has inlet portion 71 overleaf, therefore, the emulsion sheet making hydrophilic high becomes the position near skin, thus reliably can realize the rapid suction of discharged liquid to absorbent core 31.From the viewpoint of this liquid imbedibility, the sidewall portion 7b be preferably in back side recess 7 contacts with inlet portion 71, is seamlessly close to and engages at (hereinafter referred to as junction surface 74) at its interface.Thus, inlet portion 71 can directly suck the discharged liquid being positioned at positive dough sheet 1.As the formation method at this junction surface 74, have by the bonding method such as hot-melt adhesive, but preferably do not form the film of bonding agent and waited by spraying and both fibers are carried out each other to engage.Thus, the positive dough sheet of sidewall portion 7b(1 be made up of liquid permeability non-woven fabrics can be maintained) sparse fiber spacing from and make liquid rapidly through, and make the inlet portion 71(emulsion sheet 32 that is made up of the raw material that hydrophilic is high) produce the captivation of liquid and directly liquid be drawn into inside and absorbent core 31.Do not make it spread from the view point of sucking discharged liquid rapidly, the structure between the parts in this back side recess 7 is preferably at least configured at the crotch bottom C of diaper 10.

In order to make above liquid imbedibility effective, the degree of depth (h of inlet portion 71 ₂) relative to back side recess 7v on the recess 7(absorber of the back side) and cup depth (h ₁) be preferably more than 50%, be more preferably more than 75%.By being formed as more than above-mentioned lower limit, the liquid residue of the particularly top 7a of positive dough sheet 1 can be reduced.In addition, in fact also following situation may be there is: the penetration depth (h of inlet portion 71 rearwardly recess 7 ₂) may not be even at each back side recess 7, or Gen Ju Qing Condition and be mixed with the back side recess 7 not being formed with in fact inlet portion 71.In this case, in the entirety of back side recess, the degree of depth (h of preferred inlet portion 71 ₂) quantity of inlet portion 71 for above-mentioned more than 50% is more than 50%, is more preferably more than 70%.By being formed as more than above-mentioned lower limit, after Liquid Absorption can be reduced, touch the amount of liquid of skin.

And then, in above-mentioned preferable range, become (h ₂< h ₁) (a) pattern in, while the raising realizing liquid imbedibility, also can play intrinsic effect by having buffer gap portion 73, therefore preferably.Specifically, the power applied from positive dough sheet 1 side can be made to relax the impact of absorber 3.In addition, be in back side recess 7v on the back side recess 7(absorber near the position of skin) top 7a might not contact with inlet portion 71, thus, even if inlet portion 71 is containing moisture, also can suppress back liquid, thus the good dry feeling of positive dough sheet 1 can be realized.On the other hand, (h is become ₂=h ₁) (b) pattern in, be all with inlet portion 71 from sidewall portion 7b to top 7a, therefore from the viewpoint of liquid imbedibility for preferably.Therefore, about ratio (a)/(b) of (a) pattern in back side recess 7 entirety formed at positive dough sheet 1 with (b) pattern, the ratio being preferably (b) pattern near the portion of urinating that liquid imbedibility comes into one's own is higher, suppresses back the ratio being then preferably (a) pattern near the buttocks of liquid higher in attention.From the viewpoint paying attention to liquid imbedibility, (a) pattern of the back side recess 7 that the positive dough sheet near the portion of urinating is formed is preferably more than 4/6 with ratio (a)/(b) of (b) pattern, is more preferably more than 2/8.In addition, above-mentioned ratio (a)/(b) is preferably less than 0/10.From paying attention to the viewpoint suppressing back liquid, (a) pattern of the back side recess 7 that the positive dough sheet 1 near buttocks is formed is preferably more than 6/4 with ratio (a)/(b) of (b) pattern, is more preferably more than 8/2.In addition, above-mentioned ratio (a)/(b) is preferably less than 10/0.

As mentioned above, recess 7 is formed with spatial portion 72v in spatial portion 72(absorber overleaf) ((a) and (b) of Fig. 3).The discharged liquid that spatial portion 72 can make inlet portion 71 suck in absorber 3 diffusion inside, thus by the broadness of absorbent core face directly and effectively absorb.Thus, the infiltration rate from the discharged liquid of positive dough sheet 1 is improved, and the diffusion of the liquid of the side, skin contact face of positive dough sheet 1 can be suppressed.In addition, though when the excretion of discharged liquid is instantaneous become a large amount of, spatial portion 72 also can temporarily keep from the liquid of positive dough sheet l, becomes the regulating valve of Liquid Absorption.And the absorbent core 31 that spatial portion 72 is formed from by paper pulp fiber etc. is different, its moisture holding capacity is lower, therefore can transmit liquid rapidly to absorbent core 31.Like this, although spatial portion 72 temporarily keeps liquid as the regulating valve of liquid, space can be made to recover immediately, therefore not only when a large amount of excretions, even if when excretion repeatedly, also can fully tackle.In addition, if the skin contact side of absorbent core 31 is shape smooth in fact, then the effect of this spatial portion 72 becomes more effective, so preferably.Although the skin contact side of absorbent core 31 need not be level and smooth, the roundlet of the fluffing of paper pulp fiber (with reference to Fig. 2-1(a) (ii) in figure) to carry out rapidly this point from the transfer making liquid to absorbent core be preferred for the situation that arrives spatial portion 72.

(the degree of depth (the h of back side recess 7 ₁), the degree of depth (h of inlet portion 71 ₂) and buffering clearance portion 73 the degree of depth (h ₃) assay method)

The degree of depth (the h of back side recess 7 ₁) measurement be that the tangent line t(measuring adjacent bottom 7c is with reference to Fig. 2-1(c by being amplified in the cross section of the positive dough sheet 1 by top 7a and bottom 7c)) carry out with the distance of top 7a.The degree of depth (the h of inlet portion 71 ₂) measurement be by carrying out measurement to carry out to the top 71a of side, skin contact face protuberance of inlet portion 71 and the distance of the tangent line of above-mentioned bottom 7c.Both differences are set to the degree of depth (h in buffer gap portion 73 ₃).（h ₃＝h ₁－h ₂）。During measurement, the measurement of the amplification having carried out utilizing the VH-3000 microscope of KEYENCE to carry out and the point-to-point transmission measurement method after alignment settings.Also ultramicroscope can be used.

Like this, diaper 10 has both back side recess 7v on the recess 7(absorber of the back side) and the high liquid inhalation power of inlet portion 71, spatial portion 72v in spatial portion 72(absorber) the convective structure of efficient liquid.Namely, the structure of the inlet portion 71 of back side recess 7, emulsion sheet 32, spatial portion 72 and absorbent core 31 cooperatively interacts and plays a role, the liquid of skin side can be suppressed to spread, and liquid is spread in the absorbent core 31 of absorber inside, reliably absorb and keep liquid and make its immobilization.Thus, the liquid residue in positive dough sheet 1 side can be suppressed or return liquid, and realizing the good dry feeling to wearer skin.

In addition, can absorb in the absorbent core 31 keeping liquid with the face of broadness, the support or oppose arrival area of dough sheet 2 side of liquid also broadens, and dampness externally can be discharged efficiently from back sheet 2.Its result, the reduction of the diaper temperature caused by the heat of vaporization of dampness can be realized by the face of the broadness of back sheet 2 side, can effectively suppress the moisture in diaper l0 inside (part of being surrounded by the skin of back sheet 2 and wearer) to evapotranspire, thus diaper 10 more not easily can produce stewing wet sense.

In order to realize above-mentioned action effect, Fig. 2-1(b) shown in back side recess 7 bottom 7c-bottom distance (r between 7c ₁) with the degree of depth (h of back side recess ₁) ratio (r ₁/ h ₁) be preferably more than 1/1, be more preferably more than 10/8.In addition, above-mentioned ratio (r ₁/ h ₁) be preferably below 3/l, be more preferably less than 10/4.In addition, the pitch (w between the top 7a-7a of back side recess ₁) with the degree of depth (h of back side recess ₁) ratio (w ₁/ h ₁) be preferably more than 1/1, be more preferably more than 10/8.In addition, above-mentioned ratio (w ₁/ h ₁) be preferably less than 3/1, be more preferably less than 10/4.By being set to more than above-mentioned lower limit, the positive dough sheet structure that emulsion sheet easily enters can being configured to, by being set to below the above-mentioned upper limit, the volume in space 72 can being guaranteed significantly.

In positive dough sheet 1, be preferably provided with back side protuberance 8 between back side recess 7,7 as described above, and overleaf protuberance 8 have top 8a.Overleaf in protuberance 8, as shown in Figure 3, positive dough sheet 1 is formed in contacting of top 8a with absorbent core 31 via emulsion sheet 32, can suitably suppress this contact area.By suppressing the contact area with this absorbent core 31, becoming smooth and easy except making the diffusion of the liquid on absorbent core 31 makes except infiltration rate shortening, also the liquid that returns to positive dough sheet 1 side after Liquid Absorption is made to be inhibited, match with the structure in above-mentioned back side recess 7, effectively suppress soaking at positive dough sheet 1 further.

And then in positive dough sheet 1, its side, skin contact face is preferably and is concatenated to form front protuberance 78 and front recess 88 with the fluctuating of back side recess 7 and back side protuberance 8 matchingly and forms concavo-convex shape.Preferably, the concaveconvex shape of this back side, front one is configured with multiple in the in-plane direction, overall as positive dough sheet 1, is formed in a plurality of directions irregular (with reference to Fig. 4) repeatedly.By the shape of this positive dough sheet 1, absorbent core 31 and the contact area of positive dough sheet 1 can not only be reduced, also can reduce the skin of wearer and the contact area of positive dough sheet 1.By the minimizing of this contact area, effectively suppress the soaking of skin further, and also improve due to the breathability of jog, thus also effectively prevent stewing wet sense further.In addition, if be concaveconvex shape on the two sides of positive dough sheet 1, then three-dimensional activity is followed well, show the resiliency carrying out the solid supported on two sides with point.If the top 78a of front protuberance 78 is the curve form of band circular arc, then combine with this resiliency, soft skin sense of touch can be obtained.

In addition, preferably, the concaveconvex shape of positive dough sheet 1 as shown in Figure 4, is formed from front protuberance 78 towards the downward-sloping sidewall portion 88b(=78b of front recess 88), make front recess 88 become independently mortar shape or cup-shaped.Thus, the catching of discharged liquid and fluid absorbent is made more effectively to promote.About this point, be described with reference to Fig. 5.

Fig. 5 is by Fig. 2-1(a) fixed cross section a part amplify represent close-up sectional view.In addition, relative to the concavo-convex row (k represented as this cross section ₁row), about the concavo-convex row (k of its inboard ₂row), in order to understand penetration by liquid, avoiding complex, omitting back side protuberance and only representing front protuberance.In present embodiment, such as, discharged liquid a ₁easier than the top 78a of front protuberance 78 along its sidewall portion 78b(=88b) downward (arrow b ₁) accumulate near the top 88a of front recess 88, and be difficult to move to in-plane.Thus, discharged liquid can be suppressed further in the diffusibility of the side, skin contact face of positive dough sheet l, and this discharged liquid can be made to move to position away from skin in a thickness direction.In addition, the discharged liquid moving to front recess 88 is the sidewall portion 7b from this 88b(=back side, sidewall portion recess 7) attracted to inlet portion 71(arrow b via the junction surface 74 of inside ₂), and suck to spatial portion 72.And liquid spreads (arrow b from spatial portion 72 to in-plane ₃), transmitted (arrow b to absorbent core 31 ₄) and immobilization.In addition, arrow b ₂to b ₄it is the mechanism of action about the back side recess as above-mentioned basic structure part.Like this, the concaveconvex shape of front protuberance 78 and front recess 88 can make the function of back side recess 7 more effective.

In the side, non-skin contact face of positive dough sheet l, preferably each back side protuberance 8 is surrounded and separate configuration in the in-plane direction by multiple back sides recess 7, and the space of each back side recess 7 is interconnected in the in-plane direction.Above-mentioned separate configurations is not limited to back side protuberance 8,8 and leaves completely each other and be separated completely, as long as it is separated also to comprise at least top 8a periphery, and the situation that a part is connected.Preferably configure about it, be described with reference to Fig. 6.

Fig. 6 aligns the back side recess of side, non-skin contact face of dough sheet and the relation of back side protuberance carries out top view and the key diagram schematically shown, and the configuration relation based on top 7a and 8a carries out simplifying and modelling represents.Specifically, the top 7a making back side recess 7 is white circular, makes the top 8a of back side protuberance 8 be that dark circles represents.In Fig. 6, the respective region between the 7a-top 8a of 8a-top, top, between the 7a of 7a-top, top, between the 8a of 8a-top, top is sidewall portion.Wherein, for understanding above-mentioned preferred configuration, the sidewall portion in the region between the 8a of 8a-top, top represents with the figure of elongated hourglass shape, and is set to symbol m.In addition, above-mentioned sidewall portion is the part forming back side recess 7 and back side protuberance 8 continuously, also refers to any one in above-mentioned sidewall portion 7b and 8b.

As shown in Figure 6, sidewall portion m is configured with between 8a-top, the top 8a of protuberance 8 overleaf.This sidewall portion m is not the shape of the top 8a connecting back side protuberance 8 completely, but the elongated hourglass shape be preferably as shown in Figure 6 divides the z in sheet thickness direction (Fig. 2-1(b) like that in the central portion ₂to z ₁direction) on the shape of tightening up.Part is tightened up at this, although back side protuberance 8,8 is incomplete, but still divided and independently, in the part of tightening up of sidewall portion m, the space of back side recess 7 is connected.That is, in the side, non-skin contact face of positive dough sheet l, being not only concaveconvex shape between the 8a of 7a-top, top 8a-top, is also concaveconvex shape between the 8a of 8a-top, top, is formed and connects back side recess 7,7 space each other.Such as, as shown in Figure 7, preferential side wall portion m is formed as arciform.The space of each back side recess 7 becomes along the arciform of sidewall portion m the state freely can come and gone as the hollow arrow marked in Fig. 6 or Fig. 7 each other.If positive dough sheet 1 is this preferred shape, then become the inlet portion 71 forming emulsion sheet 32 along this shape, the also interconnective structure of each spatial portion 72 below it.Thus, the discharged liquid being sucked into spatial portion 72 hollow arrow as shown in Figure 6,7 can get around the pillar of back side recess 7 and free diffusing like that, thus can absorb efficiently with the broader face of absorbent core 31 and keep discharged liquid and make its immobilization.

In the absorption process of the liquid shown in Fig. 3 or Fig. 5 of diaper 10, the fibre density of the non-woven fabrics of the positive dough sheet 1 in the recess of the preferred back side has the density contrast from top 7a to bottom 7c or density gradient that increase from.Thus, can make liquid from side, skin contact face rapidly through, more strongly liquid is absorbed.This density contrast, density gradient are such as by by Fig. 2-1(b) shown in back side recess 7 institute's uniform section in be formed as the height (h of back side recess 7 throughout the positive dough sheet 1 to bottom 7c from top 7a ₁) trisection (A portion, B portion, C portion), and each fibre density (n to them ₁, n ₂, n ₃) on average compare and represent.The fibre density in A portion, B portion, C portion is preferably (n ₁) < (n ₂) < (n ₃), its ratio (n ₁/ n ₂/ n ₃) be preferably more than 2/6/10, be more preferably more than 3/5/10.In addition, above-mentioned ratio (n ₁/ n ₂/ n ₃) be preferably less than 8/9/10, be more preferably less than 5/7/10.By being set to more than above-mentioned lower limit, can guaranteeing that skin sense of touch is good, by being set to below the above-mentioned upper limit, the liquid residue of positive dough sheet 1 can be reduced.

(assay method of density)

Top 7a, the sidewall portion 7b of the positive dough sheet 1 in above-mentioned back side recess 7, the density (n of bottom 7c ₁, n ₂, n ₃) can measure by the following method.

With the degree of depth (h of back side recess 7 ₁) be benchmark, the various piece of the part trisection of the positive dough sheet l from top 7a to bottom 7b is set to A portion, B portion, C portion, following sweep electron microscope is used to align carrying out amplifying observation by the section of top 7a and bottom 7b (fibre section being adjusted to the multiplying power can measuring 30 to 60 of dough sheet, be more than 150 times and less than 500 times), the quantity in the cross section of cut-off fiber is calculated by the above-mentioned section of every certain area.Then, convert into about 1mm ²the number of cross sections of fiber, it can be used as fibre density (root/mm ²).Be determined at three places to carry out, in addition on average, as the fibre density of this sample.

The JCM-5100(trade name of scanning electron microscope, NEC (strain) society)

(variation of the cross sectional shape of back side recess and positive dough sheet)

In diaper 10, the cross sectional shape of back side recess 7 is not limited to aforesaid way (with reference to Fig. 2-1(b)), as long as have aforesaid liquid absorbability, then can be formed as arbitrary shape.Such as, the top 7a that can enumerate as shown in Figure 8 be back side recess (a) of steeple shape or there is back side recess (b) of multiple top 7a, back side recess (d) etc. that back side recess (c) that top 7a is smooth, top 7a bloat relative to the width between sidewall portion 7b, 7b.Equally, the cross sectional shape of positive dough sheet 1 is not limited to the concaveconvex shape of present embodiment, as long as can realize the configuration relation of back side recess and the emulsion sheet below it 32 and absorbent core 31, then can be set to arbitrary shape.Such as, can enumerate between the smooth shape (a) in side, skin contact face as shown in Figure 9, back side recess 7,7 and leave and the shape (b) etc. of the top flat of back side protuberance.When the shape of such as Fig. 9 (b), the bottom 7c of back side recess 7 is cross sections of the curved surface of the plane at the 8a place, top of back side protuberance 8 and the sidewall portion 7b of back side recess 7.

(variation of absorbent core)

And then in diaper 10, the shape of absorbent core is not limited to the slab-sided shape of skin contact of present embodiment, at random can adopts and can make enter into inner liquid long range diffusion and promptly kept and immobilized shape by absorption.Such as, as shown in Figure 10, absorbent core 90(Figure 10 (a) be made up of the recess 91 of channel-shaped, the outstanding absorbent portion 93 of bulk distinguished by this recess and the recess absorbent portion 94 connecting the one side side of this outstanding absorbent portion 93 corresponding to recess 91 can be enumerated), 90a(Figure 10 (b)) etc.When using this absorbent core, sucking and spreading along recess 91 or the recess absorbent portion 94 below it in the liquid of spatial portion 72, absorb dispersedly and remain in each outstanding absorbent portion 93 and be immobilized.Make liquid reliably immobilization in wider scope by this path, be therefore difficult to produce time liquid to positive dough sheet side.And then, in this absorbent core 90 and 90a, if be set to recess absorbent portion 94 to be in a ratio of low grammes per square metre with outstanding absorbent portion 93, then can alleviate and pass through resistance at the liquid of recess absorbent portion 94, liquid is easily spread, and can reduce liquid retainability, liquid easily moves to outstanding absorbent portion 93.In addition, from same viewpoint, the density of the outstanding absorbent portion 93 of the density ratio high grammes per square metre of the recess absorbent portion 94 of preferred low grammes per square metre is low.Any surface in the face of the recess absorbent portion 94 of the face at recess 91 place, low grammes per square metre also can be set to side, skin contact face by this absorbent core 90 and 90a, and can configure arbitrarily according to the object of absorbent commodity.

When adopting absorbent core 90 or 90a, be preferably following configuration: at least comprising the crotch bottom C of excretory portion corresponding region, recess 91 or recess absorbent portion 94 and spatial portion 72 in the spatial portion 72(absorber of back side recess 7) overlapping.Thus, the liquid being in spatial portion 72 easily moves to recess 91 or recess absorbent portion 94, and easily spreads and be immobilized rapidly.

(the formation method of back side recess 7 and inlet portion 71)

The absorbent commodity with back side recess 7 and inlet portion 71 as shown in Fig. 2-2 can obtain in the common manufacturing process of this article.Such as, by such as under type formation, that is: stacked stage of absorber and positive dough sheet in the assembling process of diaper, the mode being connected to above-mentioned backer roll to make positive dough sheet 1 above-mentioned sandwich is directed in the backer roll that is formed with jog and and the backing roll that is oppositely disposed of this backer roll between, carry out partly pressurizeing and heating.Now, apply hot-melt adhesive preferably by plane-of-weakness joint type spraying, spiral coating etc. and carry out bonding discontinuously, be close to the non-woven fabrics and emulsion sheet that make positive dough sheet 1 and form back side recess.In addition, preferred emulsion sheet is more sparsely bonding by spiral coating etc. with between absorbent core.Bonding agent preferably between this positive dough sheet and emulsion sheet is coated with density (q ₁) than the coating density (q of the hot-melt adhesive between emulsion sheet and absorbent core ₂) higher, its ratio (q ₁/ q ₂) be preferably more than 2/1, be more preferably more than 3/1.In addition, above-mentioned ratio (q ₁/ q ₂) be preferably less than 10/1, be more preferably less than 5/1.And then, when forming back side recess by above-mentioned backer roll, the figuration sheet of the concaveconvex shape had in advance as shown in Figure 4 if use or concaveconvex shape as shown in Figure 9, and use the parts with fibre pick or have pleat or pleat stricture of vagina and the parts with retractility as emulsion sheet, then more can improve the close property of positive dough sheet l in the recess of the back side and inlet portion 71, the inlet portion 71 entering darker can be formed, therefore preferably.

The manufacture of above-mentioned figuration sheet can be carried out as follows.Fibre web before carrying out welding is supplied to fibre web size enlargement apparatus to form fixed thickness from carding machine, above-mentioned fibre web is fixed on and there is multiple projection and have on the pedestal of breathability.Then, with each fiber can the temperature of suitably welding to the fibre web blowing hot-air on this pedestal, according to the projection in said base to fibre web figuration, and make each fiber welding.The temperature of hot blast is now preferably the temperature higher relative to the fusing point of the thermoplastic fibre forming fibre web, and its temperature difference is preferably more than 0 DEG C, is more preferably more than 5 DEG C.In addition, said temperature difference is preferably less than 70 DEG C, is more preferably less than 50 DEG C.As thermoplastic fibre, include, for example: the TPO such as polypropylene, polyethylene, polyesters, nylon 6, nylon66 fiber etc. are polyamide-based, polypropylene nitrile etc. or comprise their two or more core-sheath-type, the composite fibre etc. of parallel type.As thermoplastic fibre, when use comprise the composite fibre of low melting point composition and high-melting-point composition, the temperature blowing to the hot blast of fibre web is preferably more than the fusing point of low melting point composition and lower than the fusing point of high-melting-point composition.The temperature blowing to the hot blast of fibre web is preferably the fusing point more than+0 DEG C of low melting point composition, is more preferably the fusing point more than+5 DEG C of low melting point composition, is preferably the fusing point less than-10 DEG C of high-melting-point composition, is more preferably the fusing point less than-20 DEG C of high-melting-point composition.The content of the thermoplastic fibre of fibre web and non-woven fabrics is preferably more than 30 quality %, is more preferably more than 40 quality %.In addition, above-mentioned thermoplastic fiber content is preferably below 100 quality %, is more preferably below 80 quality %.Fibre web and non-woven fabrics also can comprise the fiber (such as natural fiber, artificial silk or the acetate fiber etc. such as cotton or paper pulp) originally without heat sealability.

From the viewpoint of plastic property and feel, the wind speed of hot blast when carrying out figuration to fibre web is preferably set to more than 20m/ second, is more preferably set to more than 30m/ second.In addition, above-mentioned wind speed is preferably set to below 130m/ second, is more preferably set to below 100m/ second.If wind speed is more than this lower limit, then third dimension becomes abundant, can give full play to the effect of resiliency and Excreta catching, so preferably.If wind speed is below this higher limit, then sheet not perforate and can maintain resistance against compression well, therefore can give full play to the effect of resiliency and Excreta catching, so preferably.

If consideration continuous seepage, then can enumerate the conveyor type or drum-type that said base to be set to and can to carry, constantly be batched the mode of the non-woven fabrics of the figuration transported by roller.In addition, about the non-woven fabrics of present embodiment, no matter towards which side in MD direction and CD direction.

As the formation material of positive dough sheet 1, back sheet 2, absorber 3 and lateral plate 4, the material usually used in absorbent commodity can be used.

As positive dough sheet l, such as preferably use hydrophilic non-woven, preferably be called as the non-woven fabrics of hot-wind nonwoven cloth, sticky (pointbond) non-woven fabrics of point, spun-bonded non-woven fabrics, spun-laced nonwoven fabric, stereo type non-woven fabric, its fiber is preferably the fiber being implemented hydrophilicity-imparting treatment with the natural fibers such as cotton or polyacrylic ultimate fibre, polypropylene and poly composite fibre, polyethylene terephthalate and poly composite fibre etc., and its grammes per square metre is 15g/m ²above 50g/m ²below.In addition, in the crotch lower part of positive dough sheet 1, hydrophilic apertured film or hydrophilic non-woven can be overlapped in the side, non-skin face of positive dough sheet 1 partly.

As back sheet 2, as long as such as there is water proofing property and there is poisture-penetrability, then be not particularly limited, include, for example by hydrophobic thermoplastic resin, with the small inorganic filler containing calcium carbonate etc. or the melting mixing such as organic polymer without intermiscibility and form film, make the porous membrane that this film single shaft or twin shaft extend and obtain.As above-mentioned thermoplastic resin, polyolefin can be enumerated.As this polyolefin, can enumerate height ~ Low Density Polyethylene, wire Low Density Polyethylene, polypropylene, polybutene etc., they can be used alone or mix rear use.

As absorber 3, the absorber usually used in absorbent commodity can be used.Specifically, as absorbent core, such as, can use fiber aggregate, maybe by absorbent core etc. that this fiber aggregate and superabsorbent polymer together use and obtain.As the fiber forming fiber aggregate, the hydrophilic natural fibers such as paper pulp fiber or synthetic fibers (preferably having implemented the fiber of hydrophilicity-imparting treatment) etc. can be used.Grammes per square metre is not particularly limited, and is preferably 150g/m ²above and 500g/m ²below.

In addition, as covering the emulsion sheet of absorbent core, such as, the paper (paper that thickness is thin) that hydrophilic thin paper etc. can be used thinner, crimped paper, the non-woven fabrics be made up of hydrophilic fibres such as cotton or artificial silks, the fiber of synthetic resin implemented to the non-woven fabrics of hydrophilicity-imparting treatment, such as comprise the sheet of hot-wind nonwoven cloth, some bonded non-woven fabrics, spun-laced nonwoven fabric, spun-bonded non-woven fabrics, spunbond-melt blown-spunbond (SMS) non-woven fabrics etc.

As above-mentioned lateral plate 4, such as, be preferably hydrophobicity non-woven fabrics, specifically, spun-bonded non-woven fabrics, spunbond-melt blown (SM) non-woven fabrics, spunbond-melt blown-spunbond (SMS) non-woven fabrics etc. can be used.As three-dimensional gauffer elastomeric element or the leg creases elastomeric element of lateral plate 4, the common elastomeric element used can be used in this kind of article, such as raw material, can enumerate: the synthetic rubber such as styrene-butadiene, butadiene, isoprene, neoprene, natural rubber, EVA, expandable polyolefin hydrocarbon, polyurethane etc., as form, can use that cross section is rectangle, square, circle, polygon-shaped etc. wire or band shape (flat rubber etc.) form, or the form etc. of the wire of multifilament type.

Absorbent commodity of the present invention is by making Existential Space portion between above-mentioned back side recess and the emulsion sheet entered wherein and this emulsion sheet and absorbent core, and suppress the liquid diffusion in positive dough sheet side thus improve liquid inhalation power internally, and then sucked liquid can be made to spread in absorbent core, make liquid rapidly in inner immobilization.Therefore, absorbent commodity of the present invention can obtain following excellent action effect, that is: the absorbent properties of existing absorbent commodity are improved further, even if having discharged liquid repeatedly or a large amount of discharged liquid, also can suppress the diffusion of the liquid in positive dough sheet side, suck rapidly liquid simultaneously and impel it in absorber diffusion inside and it is absorbed maintenance effectively, thus, suppress soaking of skin, thus bring good wearing feeling.

In absorbent commodity of the present invention, as long as absorbent core has, Liquid Absorption is kept therein and make its immobilized function, be then not limited to the absorbent core of above-mentioned embodiment, such as, also can be the slim absorbent core of lamellar.In addition, in absorbent commodity of the present invention, as long as emulsion sheet has the side, at least skin contact face covering above-mentioned absorbent core, there is the function transmitting liquid to above-mentioned absorbent core, then be not limited to the emulsion sheet of above-mentioned embodiment, such as also for possessing the parts of liquid diffusibility energy, also can be not limited to monolayer in addition and can be multilamellar.

Absorbent commodity of the present invention is not limited to the flat type disposable diaper of above-mentioned embodiment, can be the article comprising the relation with positive dough sheet, emulsion sheet and absorbent core, such as also can be pull-on disposable diaper, or pull-on disposable diaper and part fracture is used as the diaper of banding pattern, also can be urine absorbent pad or sanitary napkin, protective pad, light incontinence pad in addition.In addition, absorbent commodity of the present invention is not limited to menses effective, also effective to urine in addition, leucorrhea, soft stool etc.In addition, absorbent commodity of the present invention also correspondingly suitably can assemble other parts according to purposes or function in the article of present embodiment.

Then, be described with reference to the disposable diaper 20 of Figure 13 ~ 22 to the second embodiment as absorbent commodity of the present invention.The feature of the diaper 20 of the second embodiment is, except the above-mentioned formation comprising the diaper 10 of the first embodiment of the positive dough sheet with back side recess, have further be positioned at absorber 3 long side direction outside the positive dough sheet l of (end laminated section 5) and the one variant part 51 of back sheet 2.

Below, omit the part repeated with above-mentioned first embodiment, the second embodiment of the present invention is described.In addition, above-mentioned first embodiment not has independent and exclusive relation with this second embodiment, such as, the second embodiment can be orientated as the mode in the subordinate concept being contained in above-mentioned first embodiment.In addition, the invention of the first embodiment is have to form single inventive concept and the technical relation that is mutually related based on identical or corresponding specified features with the invention of the second embodiment.Exist mark same-sign such as same parts and situation about omitting the description (wherein, size or detailed position relationship are with reference to the accompanying drawing corresponding with respective embodiment).

Figure 13 is local excision's axonometric chart of the disposable diaper of the preferred embodiment (the 3rd embodiment) schematically shown from direction, skin contact face as absorbent commodity of the present invention.Diaper shown in this figure is the disposable urine napkin of banding pattern, with the diaper slight curvature of the state by planar development, from the state representation that inner side (side, skin contact face) is observed.

First, the summary of the disposable diaper 20 of the second embodiment is described.

The disposable diaper 20 of the second embodiment has the component parts (positive dough sheet 1, back sheet 2, absorber 3 and lateral plate 4 etc.) substantially identical with the diaper 10 of the first embodiment.But, in fig. 13, in order to avoid complex and the not shown absorbent core of formation absorber 3 and the differentiation of emulsion sheet, but absorber 3 entirety is represented as 1 parts.

The disposable diaper 20 of the second embodiment is from the different of disposable urine napkin 10 of the first embodiment, is configured with the formation this point of one variant part 51 in the long side direction foreign side of absorber 3.About this point, be described below.

Positive dough sheet 1 is consistent with long side direction (Y-direction) length of back sheet 2, and longer than the length of absorber 3.In long side direction end 3a, 3a foreign side of absorber 3, it is stacked and fit (this part is called end laminated section 5) that absorber 3 ground is not set between positive dough sheet 1 and back sheet 2.This applying method can adopt the method used in this article, such as, engage discontinuously by hot-melt adhesive is carried out atomizing coating.When this atomizing applies, scalable coating amount and coating density suppress rigidity, make two sheet sets firmly and integration.End laminated section 5 is positioned at veutro portion F and the drosal part R of diaper 20, is configured at the waist of wearer when dressing diaper 20.When dressing diaper 20, end laminated section 5 becomes the configuration consistent with the height direction of wearer to long side direction end 20a, 20a of diaper from the 3a side, long side direction end of absorber 3.The details of this end laminated section 5 are carried out aftermentioned.

Then, with reference to Figure 14, the end laminated section 5 in diaper 20 is described.As shown in figure 14, in the end laminated section 5 of diaper 20, comprise multiple one variant part 51, this one variant part 51 be by together with the opposite face of positive dough sheet l and back sheet 2 is under the state of laminating and integratedly in a thickness direction convexly distortion form.In each one variant part 51, as long as positive dough sheet 1 is out of shape on identical thickness direction with back sheet 2, then one variant part 51,51 ... the large I of amplitude of distortion each other need not be consistent.In diaper 20, one variant part 51 is formed by the one skin side variant part 52 outstanding to side, skin contact face and the one non-skin side variant part 53 outstanding to side, non-skin contact face.In each one variant part 51, be formed as the horizontal plane of above-mentioned two panels relative to the non-skin side of absorber 3 partly towards the state that skin side or non-skin side turn to." integrally " of one variant part 51 refers to that positive dough sheet 1 and back sheet 2 form the convex shaped part being combined into as duplexer, is not limited to situation about being seamlessly close to, and also can have the trickle gap of the degree that liquid can be hindered to spread in the interface between two panels.In addition, so-called " integrally ", if from other viewpoint, then that two panels is close to formation protuberance, even if make to apply various pressure etc. to end laminated section 5, in one variant part 51, above-mentioned two panels also carries out roughly the same distortion, can recover in fact the shape of one variant part 51 in addition when removing pressure.In addition, as long as above-mentioned integration can be obtained, then other parts can be provided with between two panels.

As shown in figure 14, above-mentioned multiple one variant part 51 is distributed on the in-plane of end laminated section 5.This one variant part 51 " being distributed " refers to, one variant part 51 is mutually to leave and the mode spread in all directions when overlooking configures.In this second embodiment, the one variant part of above-mentioned two kinds alternately on long side direction (Y-direction) and width (X-direction), forms multiple row, the staggered arrangement of half pitch and the arrangement of adjacent row above-mentioned two kinds of one variant parts is each other formed as staggering.Like this, multiple one variant part 51 configures on a large scale on the direction, face of end laminated section 5.

For the configuration of this one variant part 51, with reference to Figure 15, emphatically the long side direction cross sectional shape of end laminated section 5 is described.Figure 15 represents that end 20a(from the end 3a of absorber 3 towards diaper 20 is with reference to Figure 13) the part in long side direction cross section, (A) be the close-up sectional view in A-A line cross section of Figure 14, (B) is the close-up sectional view in the B-B line cross section of Figure 14.

Represent at Figure 15 (A), as a part for end laminated section 5,5 one skin side variant parts 52 and 4 one non-skin side variant parts 53 are alternately formed and arrange A and the figure that arranges on long side direction.In fig .15, one skin side variant part 52 is to Z ₁the convex shaped part that side turns to.One non-skin side variant part 53 is to Z ₂the convex shaped part that side turns to.One skin side variant part 52 and one non-skin side variant part 53 configure alternately through the one variant part of the opposing party respectively.In addition, in Figure 15 (B), as a part for end laminated section 5, indicate the cross section of the row B adjacent with above-mentioned row A.In these row B, 4 one skin side variant parts 52 and 3 one non-skin side variant parts 53 are alternately arranged.The arrangement of variant part in row B is formed as mutually staggering with the arrangement of the variant part arranged in A half pitch, to the one variant part of same directional steering to configure in the nonoverlapping mode of width.

By the arrangement of above-mentioned row A and B, end laminated section 5 entirety in long side direction cross section becomes with the Z of the horizontal plane of the non-skin side relative to absorber 3 at thickness direction ₁direction and Z ₂the mode that direction rises and falls forms shape of crawling.By the distortion of this integration, the space formed between the positive dough sheet 1 of end laminated section 5 and the opposite face of back sheet 2 diminishes.In addition, the interface that space is reduced forms shape of crawling similarly.Therefore, even if the dampness in the antiperspirant or diaper of the situation that liquid spills from absorber 3 or skin becomes moisture and is inhaled into from positive dough sheet 1, liquid is also difficult to the arrow J movement like that of disconnection as shown in figure 16.That is, the minimization in the space realized by integration and above-mentioned interface crawl shape design as the liquid in this interface the resistance oozing out and soak diffusion and play a role.In addition, crawl shape correspondingly with formation, the long side direction length at above-mentioned interface is longer than the length of end laminated section 5, contributes to forming above-mentioned resistance.Thus, liquid can be effectively suppressed to spread and leakage.In addition, row A and the B of the arrangement of the half pitch that staggers has been alternately arranged multiple row in the direction of the width, also can effectively be suppressed liquid to spread by effect same as described above in the direction of the width thus.

Particularly under the wearer putting on diaper is lain down or carried out the vicissitudinous situation of posture such as standing up, sometimes become absorber 3 state almost parallel relative to bed surface with end laminated section 5 or the downward-sloping state of end laminated section 5.In this case, by the effect of gravity or cause the compressing to absorber 3 by body pressure, liquid probably enters between the opposite face of the two panels of above-mentioned end duplexer 5.

As prior art, if back sheet 2 is smooth, then lower to the resistance of liquid movement, make liquid easily soak diffusion by the capillary force in the surface tension of the back sheet 2 of the difficult permeability of liquid and interface.And then if having space, then liquid easily flows.

In addition, as the prior art putting forward the conformability etc. that is high waisted shown in by above-mentioned patent documentation 3 and 4 etc., along with the increase of number of components, the complicated of manufacturing process etc., the main cause of cost increase is also probably become.In contrast, if waist is comprise there is the smooth back sheet of concavo-convex positive dough sheet peace, then certain retractility can be given without the need to the operation of complexity or the additional of number of components.But, between this positive dough sheet and back sheet, produce the space of storing for liquid or flowing.In the portion, do not arrange absorber, the absorption without liquid keeps function.Therefore, such as, when the child dressing diaper or when needing care-giver, owing to keeping the posture of the wearer of the state of lying down and moving body etc., be difficult to ensure that liquid can not flow and spill.

But, in the diaper 20 of the second embodiment, even if when the posture of above-mentioned wearer, as shown in figure 15, the shape of crawling of the thickness direction at the interface of end laminated section 5 plays the drag effect to liquid, and play to liquid by gravity cause to thickness direction (Z ₁→ Z ₂) suction effect, as moving or soaking the barrier of diffusion and play function (with reference to Figure 16) resistant to liquids.In this situation, based on the minimization of integrated implementation space, and liquid can be effectively suppressed to spread and leakage.From this viewpoint, be preferably opposite face, particularly its top 53a firm engagement of the two panels in one non-skin side variant part 53 and get rid of space.

In the present invention, shape of crawling (S shape curved shape) is even if be formed with fixing horizontal plane as end laminated section 5 entirety, also have the shape of the part that many places are out of shape to different directions relative to this horizontal plane.In addition, from another viewpoint, it is also the shape relatively producing the turning point of multiple thickness direction towards end laminated section 5 at the non-skin side horizontal plane of absorber 3.Turning point is that the opposite face of positive dough sheet l and back sheet 2 changes nyctitropic starting point relative to horizontal direction.About this point, be described with reference to Figure 17.The top (the top 53a of the top 52a of side, skin contact face, side, non-skin contact face) of each one variant part 51 in Figure 15, turning point 54 and steering direction G is conceptually schematically shown in Figure 17.First, horizontal line FA and FB is the line extended on the base of absorber 3, is also the line of the thickness central authorities being positioned at end duplexer 5.The arrow of the left end of horizontal line FA and FB represents that end 20a(from absorber 3 towards diaper 20 is with reference to Figure 13) direction.Turning point 54 is points that integrally variant part 51 is crossing with horizontal plane FA and FB, represents with stain.To be the interfacial phase between the two panels of turning point 54 medial end portions duplexer 5 change nyctitropic direction for the direction of arrow of horizontal line FA and FB to steering direction G, represents with arrow.Further, each top (the top 53a of the top 52a of side, skin contact face, side, non-skin contact face) in one variant part 51 is represented with stain.From the viewpoint of the drag effect for the liquid movement between two panels, the top of each one variant part 51 and turning point with the border of two opposite faces for benchmark represents, and conveniently, the part that there is gap between opposite face is for benchmark represents with the side, skin contact face of back sheet 2.In addition, from the same viewpoint, above-mentioned steering direction be with from absorber 3 towards the long side direction of diaper end portion 20a side for benchmark represents with arrow.

Figure 17 (A) is the row A representing Figure 15.At row A, there are 10 turning points 54.The steering direction G of each turning point 54 is towards Z ₁the steering direction Gl in direction with towards Z ₂the steering direction G2 alternately configuration in direction.In addition, Figure 17 (B) is the row B representing Figure 15.At row B, there are 8 turning points 54.The steering direction G of each turning point 54 is towards Z ₁the steering direction Gl in direction with towards Z ₂the steering direction G2 alternately configuration in direction.Thus, the interface of two panels is following shape: even if consistent with the direction of arrow of horizontal line FA as a whole, but still have multiple starting point that amplitude occurs alternately up and down relative to this horizontal line.

As shown in figure 17, by the steering direction of multiple turning point with Z ₁direction and Z ₂direction is alternately changed, and makes the long side direction cross section of end laminated section 5 form shape of crawling, thus can effectively play above-mentioned effect.Namely, as long as multiple turning points 54 with different steering direction form the configuration of row, then the quantity of one variant part 51 can set arbitrarily, and it is distributed the rule configuration be not limited to as shown in Figure 14 or Figure 15, also can be the configuration of Else Rule, and also can be irregular configuration.As the configuration of Else Rule, such as, can be and between adjacent one variant part 51, clip horizontal part 55 as shown in Figure 18-1, also can be the combination of horizontal part 55 and one skin side variant part 52 as shown in Figure 18-2, also can be the combination of horizontal part 55 and one non-skin side variant part 53 as shown in Figure 18-3.In arbitrary situation, all clip horizontal part 55 in multiple turning point and make steering direction become Z ₁direction and Z ₂the one variant part in direction is configured with multiple continuously, and the cross section of end laminated section 5 becomes relative to horizontal line shape of crawling.

And then, as being distributed on the in-plane of one variant part 51, being not limited to the configuration of rule as shown in Figure 14, also can being the configuration of Else Rule, or also can being irregular configuration.As Else Rule configuration, the direction, the face that is combined in that also the multiple one variant parts 51 turned on same thickness direction radially can be configured such as, configure multiple.Specifically, also can as shown in figure 19, by non-for the one at center skin side variant part 53 and configure multiple in the in-plane direction around the combination of the one skin side variant part 52 of 6 around it.In this case, not only the long side direction of end laminated section 5 and width but directive cross section be formed as the concaveconvex shape becoming shape of crawling relative to horizontal line.

In addition, on end laminated section 5, shown in the combination of the arrangement of width as shown in figure 14 or (A) of Figure 15 and (B), one skin side variant part 52 and one non-skin side variant part 53 also alternately configure in the direction of the width.Thus, if apply tensile force to end laminated section 5, then as shown in figure 20, the one variant part 51 that positive dough sheet 1 and back sheet 2 one-tenth are integrated will return level and extend (with reference to Figure 20 (b)), will be recovered the shape of one variant part 51 originally and shrink (with reference to Figure 20 (a)) by removing applied force.That is, one variant part 51 produces the contractility of end laminated section 5 entirety.Its result, even if for waist when making wearing diaper 20 can not produce lax and be fastened and fixed securely, also excessively can not oppress the waist of wearer, thus can guarantee the conformability to waist by the retractility of end laminated section 5.Therefore, good wearing feeling can be obtained.Like this, diaper 20 can meet simultaneously and realize the higher anti-leakage of waist and the conformability based on contractility.

When the end laminated section 5 of the disposable diaper 20 of formation second embodiment, preferably positive dough sheet 1 is the non-woven fabrics (with reference to Fig. 4) used in the first embodiment, and by until the region of end laminated section 5 is equipped with the Structure composing of back side recess 7.In this case, at end laminated section, the surrounding of recess 7 is also provided with back side protuberance 8 overleaf, and back side recess 7 and back side protuberance 8 are alternately in the in-plane direction with adjacent roughly at equal intervals and be periodically configured with multiple.

In addition, as mentioned above, in this second embodiment, the back side recess and back side protuberance that are in end laminated section 5 are called the back side, end recess 7w and the back side, end protuberance 8w according to its equipping position, are distinguished with back side protuberance 8w on back side recess 7v on the absorber of l embodiment and absorber and be described.Or sometimes also referred to as " back side recess 7w in end laminated section 5 " and " back side protuberance 8w in end laminated section 5 ", sometimes also not distinguished especially and referred to as " back side recess 7w " and " back side protuberance 8w ".

In this case, relative to the back side, the end recess 7w of positive dough sheet l, protrusion 21(reference Fig. 2 l that the part being formed with the back sheet 2 is made up of the film of the difficult permeability of liquid (liquid not through poisture-penetrability film) etc. is swelled and entered).This back side, end recess 7w and protrusion 21 are close to and integrated forming is integrated skin side variant part 52.Meanwhile, by the formation of protrusion 21, back sheet 2 is out of shape along the shape of the positive dough sheet 1 downward from the sidewall portion 7b of the back side, end recess 7w to the top 8a of the back side, end protuberance 8w, thus forms one non-skin side variant part 53.That is, in the consistent mode of the concaveconvex shape of the side, skin contact face with positive dough sheet 1 by back sheet 2 figuration for concaveconvex shape.Therefore, when the back side, the end recess 7w of positive the dough sheet 1 and back side, end protuberance 8w is essentially cone, shape particularly at circular cone or the frustum of a cone, one skin side variant part 52 and one non-skin side variant part 53 become the identical shape close to cone shape in the lump with the protrusion 21 of back sheet 2.This shape not only in long side direction (X-direction) or width (Y-direction) but also the diffusion suppressing liquid on multi-direction, easily embodies multidirectional retractility, therefore preferably.From the viewpoint of the above-mentioned effect of one variant part 51, the penetration depth of protrusion 21 is preferably not occur that the mode in space arrives the top 7a of the back side, end recess 7w as far as possible, but may not be defined in this, also can have the penetration depth (h of protrusion 21 ₄) than the cup depth (h of the back side, end recess 7w ₁) shallow protrusion.If have several this small gap, then match with the flexibility of the non-woven fabrics becoming positive dough sheet, make the contact of positive dough sheet and skin soft, therefore preferably.

The positive dough sheet 1 of the second embodiment and the shape of back sheet 2 or size are not particularly limited, slightly different according to the size in order to effectively play the absorbent commodity that above-mentioned suitable use sense uses or purposes, the degree of depth (h of the back side, end recess 7w ₁) be preferably more than 0.4mm, be more preferably more than 1mm.In addition, the degree of depth (h of the back side, end recess 7 ₁) be preferably below 4mm, be more preferably below 3mm.In addition, the degree of depth (h of the protrusion 21 of back sheet 2 ₄) be preferably more than 0.2, be more preferably more than 0.5.In addition, the degree of depth (h of protrusion 21 ₄) be preferably below 3.5mm, be more preferably below 2mm.The degree of depth (the h of protrusion 21 ₄) relative to the degree of depth (h of the back side, end recess 7w ₁) be preferably more than 30%, be more preferably more than 50%.By being set to more than above-mentioned lower limit, the liquid residue of the particularly top 7a of positive dough sheet 1 can be reduced.In the overall quantity of the back side, end recess 7w, the degree of depth (h of protrusion 21 ₄) back side, the end recess that becomes above-mentioned more than 50% preferably has more than 50%, more preferably have more than 70%, most preferably have more than 90%.And then, in the overall quantity of the back side, end recess 7w, the degree of depth (h of protrusion 21 ₄) quantity that becomes the back side, the end recess of above-mentioned more than 100% is preferably more than 5%, is more preferably more than 10%.By being set to more than above-mentioned lower limit, after Liquid Absorption can be reduced, touch the amount of liquid of skin.

And then, in order to realize above-mentioned effect, the pitch (w between the top 7a-7a of the back side, end recess 7w ₂) with the degree of depth (h of the back side, end recess 7w ₁) ratio (w ₂/ h ₁) be preferably more than 1/l, be more preferably more than 10/8.In addition, above-mentioned ratio (w ₂/ h ₁) be preferably less than 3/1, be more preferably less than 10/4.By being set to more than above-mentioned lower limit, what can be formed as emulsion sheet enters easy positive dough sheet structure, by being set to below the above-mentioned upper limit, can guarantee the volume of spatial portion Q significantly.

(the degree of depth (the h of the back side, end recess 7w ₁), the degree of depth (h of protrusion 21 ₄) assay method)

The degree of depth (the h of the back side, end recess 7w ₁) measurement be that the tangent line t(measuring adjacent bottom 7c is with reference to Figure 21 by being amplified in the cross section of the positive dough sheet 1 by top 7a and bottom 7c) with the distance of top 7a and carrying out.The degree of depth (the h of protrusion 21 ₄) measurement be by measure side, the skin contact face protuberance 21a of the protrusion 21 and tangent line t of above-mentioned bottom 7c distance and carry out.Using the degree of depth (h of both differences as buffer gap portion 73 ₅) (h ₅=h ₁-h ₄).During measurement, amplifying by utilizing KEYENCE VH-3000 microscope to carry out, measuring based on the point-to-point transmission measurement method after calibration (calibrate) setting.Also ultramicroscope can be used.

(variation of the cross sectional shape of the back side, end recess 7w and positive dough sheet)

The cross sectional shape of the back side, end recess 7w and positive dough sheet 2 is not limited to aforesaid way, as long as play above-mentioned effect, then can be set to arbitrary shape.Such as, the mode etc. illustrated with reference to Fig. 8 and 9 can be adopted in the first embodiment.

(the formation method of one variant part 51)

Be formed with one variant part 51(one skin side variant part 52 as shown in Figure 14 or Figure 15 and one non-skin side variant part 53 at end laminated section 5) absorbent commodity can obtain in the common manufacturing process at this article.Such as, by such as under type formation, namely, in the stage across the stacked positive dough sheet 1 of absorber 3 and back sheet 2, the mode abutting above-mentioned backer roll to make positive dough sheet 1 laminated portions of the positive dough sheet 1 and back sheet 2 that are not provided with absorber is imported to the backer roll that is formed with jog and and the backing roll that is oppositely disposed of this backer roll between, and carry out pressurizeing and heating.Now, carry out discontinuity preferably by the coating such as plane-of-weakness joint type spraying, spiral coating hot-melt adhesive bonding, form one variant part 51 to make positive dough sheet 1 be close to back sheet 2.In addition, in this formation process, as shown in by above-mentioned first embodiment, the non-woven fabric plate (with reference to Fig. 4) that figuration is in advance concaveconvex shape if use, then can form one skin side variant part 52 and the one non-skin side variant part 53 of integration closely well, therefore preferably.

The manufacture of the non-woven fabric plate of above-mentioned figuration can be undertaken by the method illustrated in the first embodiment.

In this second embodiment, the positive dough sheet 1 of preferred end laminated section 5 and the opposite face abutting contact of back sheet 2, but also can in the scope of function not damaging one variant part 51, the establishing that is situated between two sheets is equipped with other parts.The interface of two sheets in the case refers between the opposite face of two sheets comprising other parts established that are situated between.

As other parts, such as, can enumerate the elastomeric element (not shown) comprising the retractility of the waistline of end laminated section 5 strengthening diaper 20.The enhancing of the retractility of waistline is promoted to object with the conformability for wearer of diaper, can by configuring multiple elastomeric element throughout width and obtain between positive dough sheet 1 and back sheet 2.In diaper 20 before wearing, by the dorsal part alar part 17 of the both sides of drosal part R, 17(with reference to Figure 13) ventralward stretches and is fixed.Now, easily extended along the bodily form of wearer by the retractility of end laminated section 5 and the retractility of elastomeric element, shrink by appropriateness time fixing and obtain good sense next to the skin.In addition, even if health has activity after dressing, also the easy waist relative to wearer change and follow neatly, thus good conformability can be maintained.When elastic components contract, the positive dough sheet l of end laminated section 5 and back sheet 2 easily produce pleat stricture of vagina or pleat.Even if in this case, in the end laminated section 5 of the second embodiment, positive dough sheet 1 and back sheet 2 are close to and integrated, and the multiple one variant parts 51 turned in a thickness direction are distributed in planar, are therefore difficult to become the pleat stricture of vagina on long side direction or pleat.This pleat stricture of vagina or pleat are divided and disperse easily through one variant part 51.Thereby, it is possible to effectively realize the enhancing of good retractility and the suppression of liquid diffusion and leakage, and preferably.

As the example of other parts that above-mentioned Jie establishes, the non-woven fabric plate 9 can enumerating the size of the scope being contained in end laminated section 5 establishing that is situated between is placed between positive dough sheet 1 and back sheet 2.This non-woven fabric plate 9 can make the veutro portion F of the waistline of formation diaper 20 and drosal part R have thickness, is endowed soft skin sense of touch.And then as shown in figure 22, non-woven fabric plate 9 is along one variant part 51(one skin side variant part 52 and one non-skin side variant part 53) formed concavo-convex and integrated by figuration.Thus, non-woven fabric plate 9 also fills up small gap, and then becomes the resistance of liquid flow, can more effectively suppress liquid to spread and leakage, therefore preferably.

As the formation material of positive dough sheet 1, back sheet 2, absorber 3 and lateral plate 4, the material be generally used in absorbent commodity can be used.Specifically, the raw material etc. of example shown in the first embodiment can be enumerated.In addition, as absorber 3, as long as have at absorbed inside maintenance liquid and make its immobilized function, then can be not limited to above-mentioned absorber, such as, also can be the slim absorber of lamellar.

Absorbent commodity of the present invention plays the action effect that can improve the excellence of the anti-leakage of the part of establishing absorber that is not situated between.

Absorbent commodity of the present invention is not limited to the flat type disposable diaper of above-mentioned embodiment, can be widely used in positive dough sheet and the back sheet absorbent commodity at the stacked structure of the foreign side of absorber.At this, positive dough sheet and back sheet to be defined as, the establishing that is not situated between put the stacked directly or indirectly and integration in the article end of absorber, the liquid-permeable sheet of side, skin contact face and the sheet of side, non-skin contact face.As long as meet this definition, then the form of positive dough sheet and back sheet is not limited to above-mentioned embodiment, and can adopt the sheet of various formation.As absorbent commodity of the present invention, if such as one portion fractures can either be made and can, as the diaper of banding pattern, also can be urine absorbent pad or sanitary napkin, protective pad, light incontinence pad in addition for pull-on disposable diaper or pull-on disposable diaper.In addition, absorbent commodity of the present invention is not limited to menses effective, also effective to urine in addition, leucorrhea, soft stool etc.

About another embodiment of absorbent commodity of the present invention, exemplify light incontinence pad and be described.Light incontinence pad is configured at the positive dough sheet of the liquid permeability of side, skin face, the back sheet being configured at side, non-skin contact face and Jie's establishing and is placed in absorber between two sheets when comprising wearing, and is elongate shape (not shown).This incontinence pad the non-skin contact face be made up of back sheet is pasted onto fabric underclothes etc. and uses.Now, the long side direction of above-mentioned incontinence pad is made to arrange to buttocks from the hypogastric region of wearer.Being formed in the long side direction end of incontinence protection is not situated between establishes this absorber and stacked directly or indirectly and fit positive dough sheet and back sheet end laminated section.Be situated between above-mentioned two sheet materials be provided with absorber region compared with, the thickness of this end laminated section is less.Therefore, when existing incontinence pad, when being attached to underclothes and between skin, easily forming space, being difficult to ensure that liquid flowing does not occur and spills.

But in the present invention, same with the embodiment of above-mentioned disposable diaper 20, in the laminated section of above-mentioned end, positive dough sheet and back sheet synthesize duplexer and are formed in the one variant part that the thickness direction of sheet convexly is out of shape.Further, above-mentioned one variant part is also arranged alternately with multiple in the direction of the width.Thus, one variant part produces the contractility of end laminated section entirety and is close to skin, thus can meet simultaneously and realize high anti-leakage and the conformability based on contractility.

Then, be described with reference to the disposable diaper 30 of Figure 25 ~ 28 to the 3rd embodiment as absorbent commodity of the present invention.The diaper 30 of the 3rd embodiment is same with the diaper 10 of the first embodiment, uses the positive dough sheet l being configured with back side recess 7 and back side protuberance 8.In the third embodiment, from the viewpoint that the absorbent properties of liquid promote, it is characterized in that, there is the distinctive structure combined together with back side recess 7 with sublayer 6 by the back side protuberance 8 surrounded by this back side recess 7.

In addition, above-mentioned first and second embodiments not have independent and exclusive relation with this 3rd embodiment, such as, the 3rd embodiment can be orientated as the mode in the subordinate concept being contained in above-mentioned first and second embodiments.In addition, the invention of the first and second embodiments is have to form single inventive concept and the technical relation that is mutually related based on identical or corresponding specified features with the invention of the 3rd embodiment.Exist mark same-sign such as same parts and situation about omitting the description (wherein, size or detailed position relationship are according to the figure corresponding with respective embodiment).

Figure 25 is local excision's axonometric chart of the disposable diaper of the preferred embodiment (the 3rd embodiment) schematically shown from direction, skin contact face as absorbent commodity of the present invention.Diaper shown in this figure is the disposable diaper of banding pattern, the state representation of observing from inner side (side, skin contact face) with the diaper slight curvature of the state by planar development.

First, the summary of the above-mentioned disposable diaper 30 of the 3rd embodiment is described.

The disposable diaper 30 of the 3rd embodiment has the parts substantially identical with the diaper 10 of the first embodiment and forms (positive dough sheet 1, back sheet 2, absorber 3 and lateral plate 4 etc.).But, in fig. 25, in order to avoid complex, and the not shown absorbent core of formation absorber 3 and the differentiation of emulsion sheet, but absorber 3 entirety is represented as 1 parts.

In the diaper 30 of the 3rd embodiment, be configured with the sublayer 6 of liquid permeability between positive dough sheet 1 and absorber 3, this point is different from the diaper 10 of the first embodiment.Sublayer 6 is less than the roughly oblong-shaped of back sheet 2 for width, and its long side direction is consistent with the long side direction of back sheet 2, the mode of the side, skin contact face that covers absorber 3 configures to make.

Sublayer 6 is sucked by the liquid rapidly from positive dough sheet 6, to the diffusion of the liquid of in-plane with send here to the efficient transmission of the liquid of absorber 3 and promote the parts of absorbent properties.In addition, sublayer 6 can arrange the distance of regulation and increase component thickness between the side, skin contact face of diaper 30 and absorber 3.Thereby, it is possible to suppress time liquid to positive dough sheet 1 side, thus effectively suppress the humidity of diaper 30 inside.

Above-mentioned positive dough sheet 1, back sheet 2 can adopt the material identical with the first embodiment with the material of absorbent portion 3.As sublayer 6, be made up of the sheet material of the fibrous material based on liquid permeability, but the details of material etc. are carried out aftermentioned.In addition, from permeability and the diffusible viewpoint of liquid, sublayer 6 optimum fiber density is lower than positive dough sheet.

Then, the cross sectional shape with reference to Figure 26-1 and Figure 26-2 pairs of diapers 30 is described, and the formation aligning dough sheet 1 and sublayer 6 is described.(a) of Figure 26-1 is the sectional view in the II-II line cross section shown in Figure 25, and (b) is the close-up sectional view of the configuration relation schematically showing positive dough sheet and sublayer 6.Figure 26-2 is photos of the replacement accompanying drawing of the cross section gained of shooting disposable diaper 30.In addition, in the photo of the replacement accompanying drawing of Figure 26-2, the part back side protuberance 8 of positive dough sheet 1 being connected to sublayer 6 represents with the part of surrounding with dotted line circle.

As Figure 26-l(a) and Figure 26-2 shown in, the cross sectional shape of diaper 30 has positive dough sheet 1 and is formed with back side protuberance 8v on the protuberance 8(absorber of the back side relative to absorber 3 alternate repetition) and back side recess 7(absorber on back side recess 7v) concaveconvex shape.And, back side protuberance 8v on protuberance 8(absorber overleaf) on, positive dough sheet 1 abuts with sublayer 6.

The present invention is kept the liquid imbedibility of sublayer, liquid diffusibility by the structure of this positive dough sheet 1 with the abutment portion (following, abutment portion to be shown for symbol 63) of sublayer 6 and is returned liquid preventive, and can realize the further minimizing of following liquid residue.With reference to Figure 26-l(b) further the structure of this positive dough sheet 1 and sublayer 6 is described.

As Figure 26-l(b) shown in, be formed from skin contact face side (Z in the side, non-skin face of positive dough sheet 1 ₁) to non-skin contact face side (Z ₂) outstanding back side protuberance 8.This back side protuberance 8 on direction, face with adjacent roughly at equal intervals and be periodically configured with multiple.And, become between each back side protuberance 8 from non-skin contact face side (Z ₂) to skin contact face side (Z ₁) back side recess 7 that caves in.This is configured to each back side protuberance 8 when overlooking to the configuration that all directions spread dispersedly.Thus, the side, non-skin contact face of positive dough sheet 1 becomes concaveconvex shape.In addition, in the third embodiment, be formed with front recess 88 in the side, skin contact face of the positive dough sheet 1 corresponding with this back side protuberance 8, be formed with front protuberance 78 in the side, skin contact face of the positive dough sheet l corresponding with back side recess 7.

As mentioned above, back side protuberance 8 is parts outstanding in side direction absorber 3 side, non-skin contact face of positive dough sheet 1.And back side protuberance 8 contacts (with reference to Figure 27) at abutting part 63 with sublayer 6.Fill the gap between absorber 3 and positive dough sheet 1 by this abutting part 63, easily make the captivation from absorber 3 be sent to positive dough sheet 1 via sublayer 6.And then, the fibre density that the fibre density of the sublayer 6 in abutment portion 63 is set to higher than the sublayer except this abutment portion is (following, the part of sublayer 6 higher for fibre density is called compact part 61, the part of sublayer 6 lower for fibre density is called part of rarefaction 62).Thus, the capillary force of the compact part 61 of sublayer 6 more easily sucks liquid with compared with the part of rarefaction 62 of sublayer 6, be combined with each other with the captivation of absorber 3, and the liquid being easy to remain in positive dough sheet 1, particularly back side protuberance 8 also can suck energetically.And liquid is transmitted efficiently to absorber 3 in sublayer 6.Its result is, strengthens the suppression of the liquid residue of positive dough sheet 1 further, and the humidity strengthened further between skin and positive dough sheet 1 suppresses.

In the third embodiment, back side protuberance 8 is formed with the top 8a of band circular arc, appropriately suppressed the contact area with the sublayer 6 at abutting part 63.Thus, suppress back liquid, thus the minimizing of the liquid residue at abutting part 63 can be realized.In addition, by the suppression of contact area, and restrained effectively soaking at positive dough sheet 1, but do not hinder the fluid absorbent in aftermentioned back side recess 7.As long as can obtain this effect, then the back side protuberance 8 of positive dough sheet 1 is not limited to the top 8a of the 3rd embodiment, also can be flat shape.

In the present invention, from the viewpoint that liquid residue reduces, do not maintained interfibrous gap by membranization separately at the formation fiber of the back side protuberance 8 of abutting part 63 abutting and the compact part 61 of sublayer 6.This situation is different from the membranization of the existing fiber realized by heat seal etc., can not hinder the transfer of liquid.And, can effectively utilize the capillary force of the compact part 61 of sublayer 6 strongly to be led by the liquid in positive dough sheet 1 absorber 3.In addition, because of not by membranization, so abutting part 63 is not by rigidization, thus skin sense of touch is improved.And, do not hinder the loft and resiliency that are realized by positive dough sheet 1 and sublayer 6, good wearing feeling can be obtained.In addition, abutting part 63 does not have the rigidity caused by membranization, even if therefore there is the extruding from the thickness direction of positive dough sheet 1 side, power is relaxed by abutting part 63 and directly can not be sent to below.Therefore, more not easily produce back liquid because of extruding, so preferably.

Further, the abutting part 63 of back side protuberance 8 and sublayer 6 preferably by the engaged part such as hot-melt adhesive, to mix with the part do not engaged by bonding agent etc. and exist.Thus, can realize with good balance liquid residue reduce with the stabilisation of abutting part 63 and deposit.In addition, the part be engaged by bonding agent is preferably required Min., ranges preferably from the bonding part of reducing in excretory portion corresponding region for it.In this way, the flowing smoothly hindering because of bonding agent following liquid to absorber can be prevented, obtain soft wearing feeling simultaneously.In addition, the part that back side protuberance 8 contacts with the compact part 61 in sublayer 6, without the need to the whole region for positive dough sheet l, is preferably at least implemented in the crotch bottom C comprising excretory portion corresponding region.In addition, excretory portion corresponding region be directly receive urine or excretion just etc. part and near.

From this viewpoint, the quantity (g of the abutting part be engaged by bonding agent etc. ₁) with the quantity (g of not engaged abutting part ₂) ratio (g ₁/ g ₂) be preferably more than 1/1, be more preferably more than 1/2.In addition, above-mentioned ratio (g ₁/ g ₂) be preferably less than 1/8, be more preferably less than 1/4.By being set to more than above-mentioned lower limit, positive dough sheet 1 becomes stable with the joint of sublayer 6, by being set to below the above-mentioned upper limit, can prevent the absorbability caused by bonding agent from hindering.In addition, utilizing hot-melt adhesive etc. by bonding abutting part 63, also waiting preferably by spraying and both fibers are put joint each other, and do not form the film of bonding agent.Thus, even if the fiber of the compact part 61 of back side protuberance 8 and sublayer 6 is engaged each other, both interfibrous gaps also easily can be kept.

In addition, from the viewpoint of the stabilisation of abutting part 63, preferably, as shown in figure 27, the compact part 61 of sublayer 6 forms the recess to side, non-skin contact face depression, and back side protuberance 8 enters into this recess and is in contact with it.If this state, even if then compact part 61 and back side protuberance 8 are not firmly bonded, be also difficult to abutting state is destroyed, easy stabilisation.In addition, even if do not expand the region area of compact part 61, but in entering part, the face that back side protuberance 8 contacts with compact part 61 is suitably expanded, and therefore improves the transfer efficiency to absorber 3.On the other hand, in following back side recess 7, if the fluffy and spatial portion 72w on the recess spatial portion 72w(sublayer slightly entering into above-mentioned back side recess 7 of the part of rarefaction 62 of sublayer 6), then become the liquid of easy guide recess spatial portion 72w, therefore preferably.The recess thickness of this compact part 61 is preferably more than 30% relative to the thickness of part of rarefaction 62, is more preferably more than 50%.In addition, the recess thickness of above-mentioned compact part 61 is preferably less than 90% relative to the thickness of part of rarefaction 62, is more preferably less than 70%.By being set to more than above-mentioned lower limit, can suppress to return liquid or steam evapotranspiring to diaper inside in abutting part, by being set to below the above-mentioned upper limit, what stably can maintain positive dough sheet l and sublayer 6 abuts state.

On the other hand, back side recess 7 is depressions of the non-skin contact side of positive dough sheet 1, and the sidewall portion 7b from top 7a towards bottom 7c formed by the positive dough sheet 1 caved in along this is formed (with reference to Figure 26-l(b)).The position of recess 7 is configured with the part of rarefaction 62 of sublayer 6 overleaf.Recess spatial portion 72w is become between the part of rarefaction 62 of back side recess 7 and sublayer 6.Even if the part having the fibrous material of positive dough sheet 1 or sublayer 6 to enter a little in recess spatial portion 72w, it is in fact also gap.Owing to being space, so from positive dough sheet 1 through the penetration by liquid resistance of liquid lower.And recess spatial portion 72w is in relatively near the position of skin side because being positioned at back side recess 7, and therefore liquid is easy to enter rapidly from top 7a or sidewall portion 7b, and the liquid easily making positive dough sheet 1 receive energetically through.In addition, this recess spatial portion 72w also becomes the buffer locations that the impact from the power of positive dough sheet l side is relaxed, so preferably.

Further, the fiber of the part of rarefaction 62 of sublayer 6 is not increased to the degree of compact part 61, therefore, it is possible to play the original function in sublayer 6, i.e. liquid imbedibility and liquid diffusibility.And the liquid entering into recess spatial portion 72w can transmit rapidly to absorber 3 with broader area by part of rarefaction 62.From this viewpoint, preferably, the fibre density of sublayer 6 is lower than the fibre density near the back side recess 7 of positive dough sheet 1.In addition, by the formation of the part of rarefaction 62 of positive dough sheet 1, recess spatial portion 72w, sublayer 6, distance between the skin of wearer and absorber can be expanded to guarantee thickness.Thereby, it is possible to suitably suppress time liquid to skin side.

As mentioned above, overleaf in recess 7, by the combination of the part of rarefaction 62 of recess spatial portion 72w and sublayer 6, the infiltration rate of the discharged liquid from positive dough sheet 1 can be improved, and suppress the diffusion of the liquid of the side, skin contact face of positive dough sheet 1.In addition, though when the excretion of discharged liquid is instantaneous reach a large amount of, recess spatial portion 72w also can temporarily keep from the liquid of positive dough sheet 1, becomes the regulating valve of Liquid Absorption.And recess spatial portion 72w is different from the absorber 3 formed by paper pulp fiber etc., and moisture holding capacity is lower, therefore, combine with the liquid diffusion of sublayer 6, liquid can be transmitted rapidly to absorber 3.Like this, although the combination of the part of rarefaction 62 of recess spatial portion 72w and sublayer 6 can temporarily keep liquid as the regulating valve of liquid, but still space can be made to recover immediately, therefore not only when a large amount of excretions, even if when excretion repeatedly, also can fully tackle.In addition, if the skin contact side of absorber 3 is shape smooth in fact, then this effect becomes more effective, so preferably.

From the viewpoint of above-mentioned infiltration rate, the cross sectional shape that the shape of back side recess 7 is preferably the back side recess 7 that sidewall portion 7b is formed is roughly Throwing thing wire shaped, and the spatial form of back side recess 7 is that top 7a is with the circular cone of circular arc or the frustum of a cone etc. close to the shape of cone (circular cone, the frustum of a cone, pyramid, the frustum of a pyramid, oblique cone etc.).The inclination that the gradient of cone shape is comparatively delayed can make liquid in a thickness direction through and do not destroy fluid drainage time pressure, make more liquid be rapidly to recess spatial portion 72w and suck.

In addition, overleaf in recess 7, top 7a is the extreme higher position (Z in the non-skin contact side of the positive dough sheet 1 of the inwall of the solid space forming back side recess 7 ₁direction) position, bottom 7c is the extreme lower position (Z in the same space ₂direction) position.The bottom 7c of back side recess is consistent with the top 8a of back side protuberance 8.In addition, the top 7a of above-mentioned back side recess 7 or top 8a of the 7c(back side, bottom protuberance) be as the vertex representation on curved surface, but being not limited to this, also can be its periphery be plane.In this case, top 7a can be decided to be point the highest in the central point of this plane or plane, and bottom 7c can be decided to be point minimum in the central point of this plane or plane.In this definition, the degree of depth (h of back side recess 7 ₁) be the difference of height of the non-skin contact side of positive dough sheet 1, and be the distance (with reference to Figure 26-l(b) from top 7a to bottom 7c).

The degree of depth (the h of back side recess 7 ₁) be different according to the size of absorbent commodity or purposes, unique value cannot be decided to be, be preferably more than 0.5mm, be more preferably more than lmm.In addition, the degree of depth (h of back side recess 7 ₁) be preferably below 4mm, be more preferably below 3mm.The degree of depth (the h of back side recess 7 ₁) by the cross section of the positive dough sheet 1 by top 7a and bottom 7c being amplified and measuring the tangent line t of adjacent bottom 7c ₁(with reference to Figure 26-l(b)) with the distance of top 7a and carrying out.During measurement, KEYENCE VH-3000 microscope is utilized to carry out amplifying, being measured by the point-to-point transmission measurement method after alignment settings.Also ultramicroscope can be used.

As mentioned above, the region (combination of recess spatial portion 72w and part of rarefaction 62) of back side recess 7, region (abutting part 63 of back side protuberance 8 and the compact part 61) synergy with back side protuberance 8, improve fluid absorbent, liquid is rapidly to absorber 3 and transmits and suppress back liquid, adds high inhibition liquid residue simultaneously.Thereby, it is possible to suppress the contact of liquid and wearer skin further, improve the effect that the humidity between skin and the side, skin face of diaper 30 reduces further.Structure between this parts is preferably at least configured at the crotch bottom C of diaper 30.The good dry feeling to wearer skin can be realized.

In addition, absorber 3 absorbs with wider face to be maintained by sublayer 6 and recess spatial portion 72w and the liquid spread, and the support or oppose arrival area of dough sheet 2 side of liquid also broadens extensively.And, dampness can be made externally to discharge efficiently from back sheet 2.Its result is, the reduction of the diaper temperature caused by the heat of vaporization of dampness can be realized by the broader face of back sheet 2 side, the moisture in diaper 30 inside (part of being surrounded with the skin of wearer by back sheet 2) effectively can be suppressed to evapotranspire, thus diaper 30 can be made more to be difficult to produce stewing wet sense.

In the present invention, from the viewpoint realizing above action effect, the fibre density (m of the compact part 61 of sublayer 6 ₆₁) be preferably 15/mm ²above, 20/mm is more preferably ²above.In addition, above-mentioned fibre density (m ₆₁) be preferably 120/mm ²below, 80/mm is more preferably ²below.In addition, the fibre density (m of the part of rarefaction 62 of sublayer 6 ₆₂) be preferably 10/mm ²above, 15/mm is more preferably ²above.In addition, above-mentioned fibre density (m ₆₂) be preferably 100/mm ²below, 60/mm is more preferably ²below.And, the fibre density (m of compact part 61 ₆₁) and the fibre density (m of part of rarefaction 62 ₆₂) ratio (m ₆₁/ m ₆₂) be preferably more than 6/5, be more preferably more than 7/5.In addition, above-mentioned ratio (m ₆₁/ m ₆₂) be preferably less than 3/1, be more preferably less than 2/1.

Further, from same viewpoint, the area (n of the side, skin contact face of sublayer 6 ₆) in the area (n overlooking region of compact part 61 ₆₃) ratio (n ₆₃/ n ₆) be preferably more than more than 1/20, be more preferably more than 1/10.In addition, aforementioned proportion (n ₆₃/ n ₆) be preferably less than 2/5, be more preferably less than 1/5.This overlooks the area (n in region ₆₃) be depression wall not considering thickness direction etc. and region area when top view sublayer 6, side, skin contact face.

(differentiating method of compact part 61 and part of rarefaction 62)

About compact part 61 and the part of rarefaction 62 of sublayer, be usually difficult to the clear and definite border distinguishing density.Therefore, it is possible to compact part 61 to be set to the part becoming depression, or compact part 61 is set to the part abutted with back side protuberance 8, to distinguish with part of rarefaction 62.

More specifically, become and the cross section of the sublayer 6 of the adjacent compact part 61 by sublayer is amplified, the part that the curve in the front, skin side of sublayer 6 is clipped by the region with circular arc as the curved caved in side, non-skin contact face.The cross section in the front, skin side of sublayer becomes the curve concaveconvex shape repeatedly continuous in the curve outstanding to side, skin contact face to side, non-skin contact face depression.On the border of this depressed part and protuberance, the direction of the region bends through roughly becoming straight line changes.The female that border by bending by this straight line with circular arc surrounds is set to depression.

(assay method of the density of sublayer 6)

Following sweep electron microscope is used to carry out amplifying observation (fibre section is adjusted to the multiplying power can measuring 30 to 60, is more than 150 times and less than 500 times), to the quantity in the cross section of the fiber cut off by above-mentioned section of approximately certain area.Then, convert into about 1mm ²the number of cross sections of fiber, it can be used as fibre density (root/mm ²).Mensuration is carried out at three places, as the fibre density of this sample after in addition average.

The JCM-5100(trade name of scanning electron microscope, NEC (strain) society)

Further, about the side, skin contact face of positive dough sheet 1, be preferably if reference in the first embodiment is Fig. 4 illustrates, be concatenated to form front protuberance 78 and front recess 88 matchingly with the fluctuating of back side recess 7 and back side protuberance 8 and the concaveconvex shape that formed.Preferably this concaveconvex shape just carrying on the back one is configured with multiple in the in-plane direction, has been concatenated to form concavo-convex (with reference to Fig. 4) on multi-direction as positive dough sheet l is overall.By the shape of this positive dough sheet 1, the contact area with sublayer 6 can not only be reduced, also can reduce the skin of wearer and the contact area of positive dough sheet 1.By the minimizing of this contact area, effectively suppress soaking skin further, and owing to also improving in jog breathability, therefore also effectively prevent stewing wet sense further.In addition, if positive dough sheet 1 two sides is concaveconvex shape, then three-dimensional activity is followed well, show the resiliency carrying out the solid supported on two sides with point.If the top 78a of front protuberance 78 is the curve form of band circular arc, then combine with this resiliency, soft skin sense of touch can be obtained.

In addition, preferably, the concaveconvex shape of positive dough sheet 1, as shown in Figure 4, is formed from front protuberance 78 towards the downward-sloping sidewall portion 88b(=78b of front recess 88), make front recess 88 become independently mortar shape or cup-shaped.Thus, the catching of discharged liquid and the raising of fluid absorbent more effective.Such as, discharged liquid to compare the top 78a of front protuberance 78 easier along its sidewall portion 78b(=88b) (arrow b downwards ₁) and assemble near the top 88a of front recess 88, and be difficult to move to in-plane.Thereby, it is possible to suppress the diffusibility of the discharged liquid in the side, skin contact face of positive dough sheet 1 further, and this discharged liquid can be made to move to the position away from skin in a thickness direction.

In this case, as shown in figure 28, the discharged liquid of front recess 88 is moved to by the sidewall portion 7b from this 88b(=back side, sidewall portion recess 7) suck (arrow b to recess spatial portion 72w ₂).Then, liquid spreads (arrow b from recess spatial portion 72w to in-plane ₃), and transmit (arrow b to absorbent core 31 ₄) and be immobilized.And, the liquid accumulated in a large number at front recess 88 this part incomplete through and easily produce liquid residue.

But its side, non-skin face, owing to abutting at abutting part 63 with the compact part 61 of sublayer 6 as back side protuberance 8, therefore, it is possible to make the inhalation power of stronger sublayer 6 and the captivation of absorber 3 be combined with each other, thus eliminates liquid residue (arrow b effectively ₅).Like this, the concaveconvex shape of front protuberance 78 and front recess 88 can make the more efficiently performance of effect based on back side protuberance 8 and back side recess 7 and sublayer 6.

About the side, non-skin contact face of positive dough sheet 1, preferably, as first drags in mode illustrated by reference Fig. 6 in fact, each back side protuberance 8 is surrounded by multiple back sides recess 7, separate configuration in the in-plane direction, and the space of each back side recess 7 is interconnected in the in-plane direction.Thus, the discharged liquid being drawn into recess spatial portion 72w hollow arrow as shown in Figure 6,7 can get around the pillar of back side recess 7 and free diffusing like that, thus effectively can absorb with the broader face of absorbent core 31 and keep discharged liquid and make its immobilization.

In the absorption process of the liquid shown in Figure 27 or Figure 28 of diaper 30, preferably, the fibre density of the non-woven fabrics of the positive dough sheet 1 in the recess of the back side has the density contrast from top 7a to bottom 7c or density gradient that increase from.Thereby, it is possible to make liquid from side, skin contact face rapidly through, and liquid more effectively internally to be sucked.This density contrast, density gradient are can such as by by Figure 26-l(b) shown in back side recess 7 institute's uniform section in positive dough sheet 1 from top 7a to bottom 7c with the height (h of back side recess 7 ₁) carry out trisection (A portion, B portion, C portion), and each fibre density (n to divided each portion ₁, n ₂, n ₃) on average compare and represent.The fibre density in A portion, B portion, C portion is preferably (n ₁) < (n ₂) < (n ₃), its ratio (n ₁/ n ₂/ n ₃) be preferably more than 2/6/10, be more preferably more than 3/5/10.In addition, above-mentioned ratio (n ₁/ n ₂/ n ₃) be preferably less than 8/9/10, be more preferably less than 5/7/10.By being set to more than above-mentioned lower limit, the comfort level of skin sense of touch can being guaranteed, by being set to below the above-mentioned upper limit, the liquid residue of positive dough sheet 1 can be reduced.

(assay method of the density of the positive dough sheet 1 in back side recess 7)

Top 7a, the sidewall portion 7b of the positive dough sheet 1 in above-mentioned back side recess 7, the density (n of bottom 7c ₁, n ₂, n ₃) can measure by the following method.

With the degree of depth (h of back side recess 7 ₁) for benchmark is by the part trisection of the positive dough sheet 1 from top 7a to bottom 7b, and various piece is set to A portion, B portion, C portion, (fibre section is adjusted to the multiplying power can measuring 30 to 60 to carrying out amplifying observation by the top 7a of positive dough sheet and the section of bottom 7b to use following sweep electron microscope, be more than 150 times and less than 500 times), the quantity in the cross section of the fiber cut off by above-mentioned section of approximately certain area is counted.Then, convert into about 1mm ²the number of cross sections of fiber, it can be used as fibre density (root/mm ²).Mensuration is carried out at three places, and the average fibre density as this sample in addition.

The JCM-5100(trade name of scanning electron microscope, NEC (strain) society)

(variation of the cross sectional shape of positive dough sheet)

In diaper 30, the cross sectional shape of positive dough sheet 1 is not limited to the concaveconvex shape of the 3rd embodiment, as long as can realize the configuration relation of back side protuberance 8 and back side recess 7 and the sublayer 6 below it, then can be set to arbitrary shape.Such as, the side, skin contact face can enumerated as shown in figure 29 is smooth shape (a), the top of back side protuberance 8 is smooth shape (b) etc.When the shape such as shown in Figure 29 (b), the bottom 7c of back side recess 7 is cross sections of the curved surface of the plane at the 8a place, top of back side protuberance 8 and the sidewall portion 7b of back side recess 7.

In the variation of these positive dough sheets 1, back side protuberance 8 is thicker than back side recess 7.Therefore, the inside of protuberance easily produces liquid residue overleaf.But, even if in this case, because back side protuberance 8 abuts with the compact part 61 of sublayer 6, therefore, it is possible to make the inhalation power of stronger sublayer 6 and the captivation of absorber 3 be combined with each other and effectively eliminate liquid residue.In addition, in this variation, the fibre density of the non-woven fabrics of the positive dough sheet 1 also in preferred recess overleaf has the density contrast from top 7a to bottom 7c or density gradient that increase from.Thereby, it is possible to make liquid from the part of the thinner thickness of positive dough sheet l to recess spatial portion 72w rapidly through, make sublayer 6 strongly to absorber inside transmit liquid.

(variation of absorber)

And then, in diaper 30, the shape forming the absorbent core of absorber does not limit the slab-sided shape of skin contact with the 3rd embodiment, can adopt arbitrarily and can make to enter into inner liquid long range diffusion and promptly kept by absorption and make its immobilized shape.Such as, can enumerate as illustrated like that with reference to Figure 10 in the first embodiment, recess 91, absorbent core 90(Figure 10 (a) that formed by the outstanding absorbent portion 93 of the bulk of this recess differentiation and the recess absorbent portion 94 connecting the one side side of this outstanding absorbent portion 93 corresponding to recess 91 by channel-shaped), 90a(Figure 10 (b)) etc.

When adopting this absorbent core 90 or 90a, be preferably configured to: at least in the crotch bottom C comprising excretory portion corresponding region, recess 91 or recess absorbent portion 94 father heavy with the recess spatial portion 72w of back side recess 7.Thus, the liquid being in recess spatial portion 72w easily moves to recess 91 or recess absorbent portion 94, and easily diffusion also immobilization rapidly.

(the formation method of back side recess 7, back side protuberance 8 and abutting part 63)

The absorbent commodity with back side recess 7, back side protuberance 8 and abutting part 63 as shown in Figure 26-2 can obtain in the common manufacturing process of this kind of article.Such as, can be formed in the following way: in the assembling process of diaper in the stacked stage of absorber and positive dough sheet, the mode being connected to the backer roll being formed with jog with positive dough sheet 1 above-mentioned sandwich is directed into above-mentioned backer roll and and the backing roll that is oppositely disposed of this backer roll between, carry out pressurized.But the object of this pressurization and heating is, the figuration of positive dough sheet 1 and the formation of abutting part 63, therefore firmness not carries out the degree of membranization as fixed in the crimping between sheet.Pressurized conditions in this situation is preferably more than 0.2MPa, is more preferably more than 0.3MPa.In addition, above-mentioned pressurization is preferably below 0.8MPa, is more preferably below 0.6MPa.In addition, when implementing heating while pressurizeing, this heating-up temperature is preferably more than room temperature, is more preferably more than 40 DEG C.In addition, above-mentioned heating-up temperature is preferably less than 100 DEG C, is more preferably less than 80 DEG C.

And, when utilizing above-mentioned backer roll to form back side recess, the figuration sheet of the concaveconvex shape had in advance as shown in Figure 4 if use or concaveconvex shape as shown in figure 29, then make the more reliable with the formation of the abutting part 63 of sublayer 6 of back side protuberance 8, now, the portion concave that can form the sublayer 6 in abutting part 63 becomes the part that the density of concavity is high, therefore preferably.

The manufacture of above-mentioned figuration sheet can be undertaken by the method illustrated in the first embodiment.

As the formation material of positive dough sheet 1, sublayer 6, back sheet 2, absorber 3 and lateral plate 4, the material be generally used in absorbent commodity can be used.Specifically, raw material etc. illustrated in the first embodiment can be enumerated.

In addition, as sublayer 6, such as can play if consider the diffusion of aforesaid liquid, through function this point, be then preferably and use non-woven fabrics or fluffy paper pulp sheet.As the concrete example of non-woven fabrics, can enumerate: hot-wind nonwoven cloth, spun-laced nonwoven fabric, spun-bonded non-woven fabrics, melt spraying non-woven fabrics etc.When these non-woven fabrics are made up of hydrophobic fibre, preferably use hydrophilic agent and make its hydrophiling.The grammes per square metre of sublayer 5 is preferably 20g/m ²above, 30g/m is more preferably ²above.In addition, above-mentioned grammes per square metre is preferably 100g/m ²below, 80g/m is more preferably ²below.

Absorbent commodity of the present invention can obtain following excellent action effect, that is: the absorbent properties of existing absorbent commodity are improved further, suppress back the humidity of liquid or article inside, and reduce the liquid residue of the side, issuable skin face according to using state or excretion etc. further, thus further can alleviate the burden to wearer skin.

In absorbent commodity of the present invention, keep liquid as long as absorber has to absorb therein and make its immobilized function, being then not limited to above-mentioned embodiment, such as, also can be the slim absorber of lamellar.In addition, in absorbent commodity of the present invention, as long as the function that liquid transmits to this absorber by the side, at least skin contact face that sublayer has the above-mentioned absorber of covering, being then not limited to above-mentioned embodiment, being also not limited to monolayer, can be multilamellar.

Absorbent commodity of the present invention is not limited to the flat type disposable diaper of above-mentioned embodiment, comprises the diaper of above-mentioned relation with positive dough sheet, sublayer and absorber.Such as, also or can be pull-on disposable diaper and make part fracture just can be used as the diaper of banding pattern for pull-on disposable diaper, also can be urine absorbent pad or sanitary napkin, protective pad, light incontinence pad in addition.In addition, absorbent commodity of the present invention is not limited to menses effective, also effective to other urine, leucorrhea, soft stool etc.In addition, absorbent commodity of the present invention also suitably can assemble other parts according to purposes or function in the diaper of the 3rd embodiment person.

About above-mentioned embodiment, the present invention discloses following absorbent commodity further.

< 1 > absorbent commodity, it has the positive dough sheet of the liquid permeability being configured at side, skin contact face, the back sheet being configured at side, non-skin contact face and the absorber arranged between these two sheets,

Above-mentioned positive dough sheet is made up of non-woven fabrics, and above-mentioned absorber has absorbent core and covers the emulsion sheet of this absorbent core,

In the side, non-skin contact face of above-mentioned positive dough sheet, multiple back side recess to side, skin contact face depression is adjacent to be distributed, and above-mentioned emulsion sheet enters into this back side recess, between this emulsion sheet entered and above-mentioned absorbent core, have spatial portion.

The absorbent commodity of < 2 > described in above-mentioned < 1 >, the side, non-skin contact face of above-mentioned positive dough sheet becomes concaveconvex shape by the periodic arrangement of above-mentioned back side recess.

The absorbent commodity of < 3 > described in above-mentioned < 1 > or < 2 >, the side, skin contact face of above-mentioned positive dough sheet is concaveconvex shape.

The absorbent commodity that < 4 > is described any one of above-mentioned < 1 > ~ < 3 >, the side, skin contact face of above-mentioned absorbent core is smooth shape.

The absorbent commodity that < 5 > is described any one of above-mentioned < 1 > ~ < 4 >, the cup depth of the depth ratio above-mentioned back side recess 7 of the inlet portion that a part for above-mentioned emulsion sheet enters into above-mentioned back side recess and formed is shallow.

The absorbent commodity that < 6 > is described any one of above-mentioned < 1 > ~ < 5 >, the penetration depth of the above-mentioned emulsion sheet in the above-mentioned back side recess of above-mentioned positive dough sheet is more than 50% of the cup depth of above-mentioned back side recess.

The absorbent commodity that < 7 > is described any one of above-mentioned < 1 > ~ < 6 >, in the entirety of above-mentioned back side recess, the penetration depth of the above-mentioned emulsion sheet in the above-mentioned back side recess of above-mentioned positive dough sheet is that the quantity of the above-mentioned back side recess of more than 50% of the cup depth of above-mentioned back side recess preferably exists more than 50%, is more preferably more than 70%.

The absorbent commodity that < 8 > is described any one of above-mentioned < 1 > ~ < 7 >, in the recess of the above-mentioned back side, between above-mentioned positive dough sheet and the entering part of above-mentioned emulsion sheet, there is clearance portion.

The absorbent commodity that < 9 > is described any one of above-mentioned < 1 > ~ < 8 >, has at the above-mentioned back side recess part that above-mentioned emulsion sheet is engaged with above-mentioned positive dough sheet.

The absorbent commodity that < 10 > is described any one of above-mentioned < 1 > ~ < 9 >, above-mentioned back side recess is the depression of the non-skin contact side of above-mentioned positive dough sheet, and being formed from top towards the sidewall portion of bottom of being formed by the positive dough sheet caved in along this.

The absorbent commodity of < 11 > described in above-mentioned < 10 >, in the recess of the above-mentioned back side, the cross sectional shape of this back side recess 7 that above-mentioned sidewall portion is formed in the shape similar with Throwing thing line, the spatial form of this back side recess in above-mentioned top with the circular cone of circular arc or the similar shape of the frustum of a cone.

The absorbent commodity of < 12 > described in above-mentioned < 10 > or < 11 >, the sidewall portion being formed with above-mentioned back side recess abuts and the junction surface be engaged with above-mentioned inlet portion.

The absorbent commodity of < 13 > described in above-mentioned < 12 >, above-mentioned junction surface makes the fiber of above-mentioned emulsion sheet and above-mentioned positive dough sheet put joint each other by spray Tu bonding agent.

The absorbent commodity that < 14 > is described any one of above-mentioned < 1 > ~ < 13 >, the side, non-skin contact face of above-mentioned positive dough sheet is configured with multiple back sides recess and multiple back sides protuberance, each above-mentioned back side protuberance is surrounded and separate configuration by multiple above-mentioned back sides recess, and the space of above-mentioned back side recess is interconnected.

The absorbent commodity that < 15 > is described any one of above-mentioned < 1 > ~ < 14 >, above-mentioned back side recess have be made up of positive dough sheet top, sidewall portion and bottom, and the density of the non-woven fabrics fiber of this positive dough sheet has the density contrast or density gradient that increase to bottom from above-mentioned top.

The absorbent commodity that < 16 > is described any one of above-mentioned < 1 > ~ < 15 >, above-mentioned absorbent core has the density structure of fibre density, has the part that the sparse part of the density of this absorbent core is overlapping with above-mentioned spatial portion.

The absorbent commodity that < 17 > is described any one of above-mentioned < 1 > ~ < 16 >, above-mentioned emulsion sheet and above-mentioned absorbent core are engaged by phased manner by hot-melt adhesive.

The absorbent commodity that < 18 > is described any one of above-mentioned < 1 > ~ < 17 >, in the cross section of above-mentioned back side recess, fibre density becomes large from side, skin face to side, non-skin face.

The absorbent commodity that < 19 > is described any one of above-mentioned < 1 > ~ < 18 >, above-mentioned absorbent commodity has end laminated section, this end laminated section is by outside the long side direction end of above-mentioned absorber, between above-mentioned positive dough sheet and above-mentioned back sheet, this absorber is not set and make above-mentioned positive dough sheet and above-mentioned back sheet directly or indirectly stacked and laminating form

Multiple one variant parts that the opposite face that above-mentioned end laminated section has above-mentioned positive dough sheet and above-mentioned back sheet is out of shape to convex integratedly in a thickness direction, the plurality of one variant part is distributed on the in-plane of above-mentioned end laminated section.

The absorbent commodity of < 20 > described in above-mentioned < 19 >, above-mentioned positive dough sheet in the laminated section of above-mentioned end and the opposite face of above-mentioned back sheet, when the cross-section of long side direction, the distortion formed by above-mentioned one variant part has shape of crawling in a thickness direction.

The absorbent commodity of < 21 > described in above-mentioned < 19 > or < 20 >, in the side, non-skin contact face of above-mentioned positive dough sheet, multiple back side recess to side, skin contact face depression is adjacent to be distributed, above-mentioned back sheet enters into the above-mentioned back side recess of above-mentioned end laminated section, forms above-mentioned one variant part.

The absorbent commodity of < 22 > described in above-mentioned < 21 >, the above-mentioned back side recess in the laminated section of above-mentioned end is the depression of roughly cone shape.

The absorbent commodity that < 23 > is described any one of above-mentioned < 19 > ~ < 22 >, above-mentioned positive dough sheet is made up of the non-woven fabrics on two sides with concaveconvex shape.

The absorbent commodity that < 24 > is described any one of above-mentioned < 19 > ~ < 23 >, in the laminated section of above-mentioned end, between above-mentioned positive dough sheet and above-mentioned back sheet, be configured with elastomeric element in the direction of the width.

The absorbent commodity that < 25 > is described any one of above-mentioned < 19 > ~ < 24 >, in the laminated section of above-mentioned end, between above-mentioned positive dough sheet and above-mentioned back sheet, be configured with the sheet be made up of non-woven fabrics.

The absorbent commodity that < 26 > is described any one of above-mentioned < 19 > ~ < 25 >, the penetration depth that the part of above-mentioned back sheet enters into the protrusion of this back side recess is more shallow than the cup depth of the above-mentioned back side recess of above-mentioned end laminated section.

The absorbent commodity of < 27 > described in above-mentioned < 26 >, the penetration depth of the above-mentioned back side recess in the laminated section of above-mentioned end is more than 0.4mm and below 4mm.

The absorbent commodity that < 28 > is described any one of above-mentioned < 1 > ~ < 27 >, in the side, non-skin contact face of above-mentioned positive dough sheet, there is formation concaveconvex shape in back side protuberance dispersion, the sublayer of liquid permeability is configured with between this positive dough sheet and above-mentioned absorber, this sublayer contacts in abutment portion with the back side protuberance of above-mentioned positive dough sheet

The fibre density of the above-mentioned sublayer of above-mentioned abutment portion is higher than the fibre density of other parts of this sublayer.

The absorbent commodity of < 29 > described in above-mentioned < 28 >, the peripheral part of the above-mentioned back side protuberance of the side, non-skin contact face of above-mentioned positive dough sheet forms the back side recess from side, side direction skin contact face, non-skin contact face depression, between this back side recess and above-mentioned sublayer, be formed with recess spatial portion, the fibre density being positioned at the above-mentioned sublayer of the position of this recess spatial portion is lower than the fibre density of the above-mentioned sublayer abutted with above-mentioned back side protuberance.

The absorbent commodity of < 30 > described in above-mentioned < 28 > or < 29 >, in the fibrous structure that the interfibrous gap that the above-mentioned back side protuberance of above-mentioned positive dough sheet and the abutment portion of above-mentioned sublayer are two parts is maintained.

The absorbent commodity that < 31 > is described any one of above-mentioned < 28 > ~ < 30 >, to mix with the abutment portion of above-mentioned sublayer at the back side protuberance of above-mentioned positive dough sheet and has bonding portion and non-adhesive part.

The absorbent commodity that < 32 > is described any one of above-mentioned < 28 > ~ < 31 >, in the back side protuberance of above-mentioned positive dough sheet and the abutment portion of above-mentioned sublayer, above-mentioned sublayer forms the recess to side, non-skin contact face depression, and the back side protuberance of above-mentioned positive dough sheet enters the recess of this sublayer and contacts with it.

The absorbent commodity that < 33 > is described any one of above-mentioned < 28 > ~ < 32 >, the region area of the abutment portion of above-mentioned sublayer and back side protuberance is more than 1/20 relative to the ratio of the area of the sheet of above-mentioned sublayer and is less than 2/5.

The absorbent commodity that < 34 > is described any one of above-mentioned < 28 > ~ < 33 > is 15/mm with the fibre density of the sublayer in the abutment portion of the back side protuberance of above-mentioned positive dough sheet ²above and be 120/mm ²below.

The absorbent commodity that < 35 > is described any one of above-mentioned < 28 > ~ < 34 >, above-mentioned sublayer is made up of hot-wind nonwoven cloth.

The absorbent commodity that < 36 > is described any one of above-mentioned < 28 > ~ < 35 >, in above-mentioned sublayer, the thickness of the part of rarefaction that the thickness of the compact part that the fibre density of above-mentioned abutment portion is high is low relative to fibre density compared with this compact part is more than 30% and less than 90%.

The absorbent commodity that < 37 > is described any one of above-mentioned < 28 > ~ < 36 >, the fibre density of the non-woven fabrics of the above-mentioned positive dough sheet in the recess of the above-mentioned back side has the density contrast or density gradient that increase to bottom from top.

The absorbent commodity that < 38 > is described any one of above-mentioned < 1 > ~ < 37 >, above-mentioned positive dough sheet is made up of hydrophilic non-woven fabrics.

The absorbent commodity that < 39 > is described any one of above-mentioned < 1 > ~ < 38 >, above-mentioned back sheet is by having water proofing property and the porous membrane with poisture-penetrability and breathability is formed.

The absorbent commodity that < 40 > is described any one of above-mentioned < 1 > ~ < 39 >, above-mentioned absorbent core is made up of paper pulp fiber and superabsorbent polymer.

The absorbent commodity that < 41 > is described any one of above-mentioned < 1 > ~ < 40 >, above-mentioned emulsion sheet is made up of hydrophilic thin paper.

The absorbent commodity that < 42 > is described any one of above-mentioned < 1 > ~ < 41 >, absorbent commodity is flat type disposable diaper.

The absorbent commodity that < 43 > is described any one of above-mentioned < 1 > ~ < 41 >, absorbent commodity is pull-on disposable diaper.

The absorbent commodity that < 44 > is described any one of above-mentioned < 1 > ~ < 41 >, absorbent commodity is pull-on disposable diaper and when by can as the diaper of banding pattern during one portion fractures.

Embodiment

Below, based on embodiment, the present invention will be described in more detail, but the present invention not separates Taishaku with being defined by these embodiments.

About the first embodiment, represent following embodiment 1 and 2 and comparative example 1 and 2.

［ embodiment 1 ］

Make to be fixed on fibre web size enlargement apparatus by the fibre web of core to be polyethylene terephthalate and sheath the be sheath-core type conjugate fiber that polyethylene is formed, to the fibre web blowing hot-air on its pedestal, along the projection in said base, figuration is carried out to fibre web, and make each fiber fusion, form the positive back side therefrom and be the concaveconvex shape (pitch (w between the top 7a-7a of back side recess ₁) degree of depth (h of 5mm and back side recess ₁) 2mm) and the figuration sheet of the shape shown in Fig. 4, it can be used as positive dough sheet and use.Sequentially stacked liquid-impermeable back sheet, (paper pulp grammes per square metre is for 200g/m to cover absorbent core with hydrophilic paper ², superabsorbent polymer grammes per square metre is 286g/m ²) absorber, positive dough sheet, by heat fusing, each several part is bonding.Back sheet, absorber shape, structure be set to identical with the diaper that corresponding Kao Corp manufactures " Merries dry and comfortable vapor-permeable type M code " (trade name) Existing commercial product.Now, the bonding agent between positive dough sheet and emulsion sheet is coated with density (q ₁) be 15g/m ², the coating density (q of the hot-melt adhesive between emulsion sheet and absorbent core ₂) be 5g/m ².By this laminated samples is pressed suitable condition lower seal and room temperature preservation 1 month encapsulating with diaper product, form the inlet portion of emulsion sheet.

The degree of depth (the h of this back side recess ₁) be average 1.5mm.In addition, the penetration depth (h of inlet portion ₂) be average 1.3mm.(h ₂)/(h ₁) ratio that becomes the back side recess of more than 50% is 95%.In addition, (h ₂)/(h ₁) become in the back side recess of more than 50%, the ratio that (100%) enters completely is 60%.

［ embodiment 2 ］

The laminated samples of embodiment 1 is pressed suitable condition lower seal and the room temperature preservation sample of 3 days is set to the sample of embodiment 2 encapsulating with diaper product.

(1) degree of depth (h of this back side recess ₁) be average 2.0mm.

(2) in addition, the penetration depth (h of inlet portion ₂) be average 0.8mm.

(3) (h ₂)/(h ₁) ratio that becomes the back side recess of more than 50% is 30%.

(4) (h ₂)/(h ₁) become in the back side recess of more than 50%, the ratio that (100%) enters completely is 5%.

［ comparative example 1 ］

Commercially available disposable diaper (trade name " Merries dry and comfortable vapor-permeable type M the code ") same specification manufactured with Kao Corp is not only carried the sample of hand work as comparative example 1 of sublayer.

［ comparative example 2 ］

To be polyethylene terephthalate by core and the smooth hot-wind nonwoven cloth that sheath is poly sheath-core type conjugate fiber to be formed as positive dough sheet, with embodiment 1,2 same, sequentially stacked liquid-impermeable back sheet, (paper pulp grammes per square metre is for 200g/m to cover absorbent core with hydrophilic paper ², superabsorbent polymer grammes per square metre is 286g/m ²) absorber, positive dough sheet, by the bonding each several part of heat fusing.Only take out the pedestal of the device above-mentioned fibre web being carried out to figuration, be placed on the positive dough sheet of sample pressurizes in the mode of pedestal projection and positive dough sheet side contacts and staticly place l month, form the sample of the comparative example 2 being formed with the one-piece type concaveconvex shape of positive dough sheet, absorber.

[performance evaluation]

For the sample (disposable diaper) of embodiment and comparative example, measure the liquid diffusion area in each layer of positive dough sheet, emulsion sheet, absorbent core.As determination test, undertaken by two kinds of tests of following (1) and (2).In addition, the diffusion of liquid in absorbent core places projection arrangement below sample, when irradiating light through and the diffusion zone of the artificial urine of redness that obtains.

(test 1)

First, for each sample of embodiment 1,2 and comparative example 1,2, the absorber width central part from veutro absorber end to back end 155mm on long side direction of the sample of planar development is set to liquid injection point, uses pump to inject 40g artificial urine with the speed of 5g/sec.The composition of artificial urine is carbamide 1.94 % by weight, sodium chloride 0.795 % by weight, magnesium sulfate 0.11 % by weight, calcium chloride 0.062 % by weight, potassium sulfate 0.197 % by weight, Amaranth (dyestuff) 0.010 % by weight, water 96.88 % by weight and polyoxyethylene laurel ether (about 0.07%) and surface tension is adjusted to 53 ± 1dyne/cm(23 DEG C).After 10 minutes in static placement, peel off positive dough sheet and take, the diffusion area of artificial urine is described to OHP sheet.For the absorber top coversheet peeled off after positive dough sheet, take too, and the diffusion area of artificial urine is described to OHP sheet.Sample is placed in projection table, irradiate from back sheet side light and through, the diffusion zone of artificial urine obtained is described to OHP sheet.Obtain the image of OHP sheet by scanner and use image analysis software Image-ProPlus(NIPPONROPER to manufacture) calculate diffusion area.

(test 2)

For each sample of embodiment 1 and comparative example 1, the absorber width central part from veutro absorber end to back end 155mm on long side direction of the sample of planar development is set to liquid injection point, uses pump to inject 40g artificial urine with the speed of 5g/sec.After 10 minutes, take from top in static placement, inject 40g artificial urine with the speed of 5g/sec from this decanting point further.After 10 minutes, the analysis of diffusion area is carried out in the same manner as test 1 further in static placement.In test 2, the analysis of the diffusion area after injecting 40g cannot be realized.In test 2, the photograph image according to shooting before second time artificial urine is injected confirms: the artificial urine disperse state injected by first time artificial urine on the positive dough sheet presented is identical with the above-mentioned sample of test l.

Above-mentioned evaluation result is represented in following table 1 and 2.In addition, the range of scatter of the liquid of the sample used in aforesaid liquid diffusion test is represented by Figure 11 and 12.Table 1 and Figure 11 represent the measurement result of above-mentioned (test 1).Table 2 and Figure 12 represent the measurement result of above-mentioned (test 2).The value of the injection 40g in table 2 and Figure 12 is enumerated in order to the respective value comparing the embodiment 1 and comparative example 1 implemented in test 1.In Figure 11 and 12, the range of scatter of the liquid of positive dough sheet be in captured replacement figure photo, mark black circle part represented by, the liquid range of scatter of emulsion sheet and absorbent core is expressed as the part of being surrounded by black line.

The difference of the change of the liquid diffusion area of each interlayer in each sample shown in Figure 11 and 12, the area further between embodiment 1,2 and comparative example 1,2 is corresponding with the measurement result of table 1 and 2.

Table 1

From the result shown in table 1 and Figure 11, embodiment 1 with 2 disposable diaper compared with comparative example l, inhibit the diffusion of the liquid of positive dough sheet, on the other hand, liquid is fully spread, no less than comparative example in internal structure below emulsion sheet or the such positive dough sheet of absorbent core.And then from the result shown in table 2 and Figure 12, about the disposable diaper of embodiment 1, twice liquid in test 2 injects and injects with the only liquid of 1 time of test l, and the liquid diffusion area of positive dough sheet is suppressed to the identical size of essence.In addition, although the disposable diaper of embodiment 1 inhibits the liquid of positive dough sheet to spread, still fully spread according to its accumulation of fluid amount in absorber inside.In contrast, in comparative example, the liquid diffusion area of the positive dough sheet after twice liquid in test 2 injects the becomes test 1 only area of about 2 times of liquid diffusion area that injects of the liquid of 1 time.

From above-mentioned situation, the disposable diaper of embodiment can obtain following excellent action effect: no matter the amount of liquid such as excretion repeatedly number, all can suppress the diffusion of the liquid at positive dough sheet, and promptly suck liquid and make it effectively absorb maintenance in absorber diffusion inside, thus, inhibit soaking of skin, bring good wearing feeling.

About the second embodiment, represent following embodiment 21 and comparative example 21 ~ 23.

[embodiment 21]

Make to be fixed on fibre web size enlargement apparatus by the fibre web of core to be polyethylene terephthalate and sheath the be sheath-core type conjugate fiber that polyethylene is formed, to the fibre web blowing hot-air on its pedestal, along the projection in said base, figuration is carried out to fibre web, and make each fiber fusion, form the positive back side therefrom and be the concaveconvex shape (pitch (w between the top 7a-7a of the back side, end recess 7w ₁) degree of depth (h of 5mm and the back side, end recess 7w ₁) 1.3mm) and the figuration sheet of the shape shown in Fig. 4, it can be used as positive dough sheet.

The positive dough sheet of the diaper " Merries dry and comfortable vapor-permeable type M code " (trade name) Kao Corp manufactured changes in above-mentioned operation the positive dough sheet obtained into and is also engaged.In addition, the drosal part of this diaper and the part by end not being configured with absorber in veutro portion are set to the stepped construction of above-mentioned positive dough sheet, back sheet and outer non-woven fabrics.Then, make the part by end not configuring absorber in the drosal part of this diaper and veutro portion by pressurizeing between backer roll and backing roll, form the end laminated section shown in Figure 14 or Figure 15 with one skin side variant part and one non-skin side variant part, be set to the test body 1A of embodiment 21.

In this end laminated section, the degree of depth (h of the back side, the end recess 7w of positive dough sheet ₁) be average 1.0mm.In addition, the penetration depth (h of the protrusion of back sheet ₄) be average 0.8mm.(h ₄)/(h ₁) ratio that becomes the back side, the end recess 7w of more than 50% is 90%.In addition, (h ₄)/(h ₁) become in the back side, the end recess 7w of more than 50%, the ratio that (100%) enters completely is 50%.

Then, for the drosal part of above-mentioned diaper test body 1A, cut with long side direction 40mm, width 70mm from diaper end portion side, it can be used as the test body 1B of embodiment 21.And then, for the drosal part of above-mentioned diaper test body 1A, different from test body 1B, cut with long side direction 45mm, width 130mm from diaper end portion side, it can be used as the test body 1C of embodiment 21.The cross sectional shape of test body 1B and 1C is the sag and swell as medelling in Figure 23 (a) represents.

[comparative example 21]

Not forming the one skin side variant part and one non-skin side variant part that realize by pressurizeing in the test body 1A of embodiment 21, obtaining the test body of diaper back sheet being kept flat condition.At this end laminated section, the degree of depth (h of the back side, the end recess 7w of positive dough sheet ₁) be average 1.0mm.In addition, the penetration depth (h of the protrusion of back sheet ₄) be average 0mm.It can be used as the test body 11A of comparative example 21.In addition, for the drosal part of test body 11A, cut with long side direction 40mm, width 70mm from diaper end portion side, it can be used as the test body 11B of comparative example 21.Further, for the drosal part of test body 11A, differently cut with long side direction 45mm, width 130mm from diaper end portion side with test body 11B, it can be used as the test body 11C of comparative example 21.The cross sectional shape of test body 11B and 11C is the sag and swell as medelling ground in Figure 23 (b) represents.

[comparative example 22]

Using the hand work as described below test body 12A as comparative example 22, this hand work is that commercially available disposable diaper (trade name " Merries dry and comfortable vapor-permeable type M the code ") part this Kao Corp manufactured changes, do not configure the elastomer outside the long side direction back end being configured at absorber that commercially available product possesses and buffering non-woven fabrics, and directly fit positive dough sheet and back sheet and formed.In its end laminated section, the degree of depth (h of the back side, the end recess 7w on the upper strata of double-deck positive dough sheet ₁) be average 0.4mm.In addition, the penetration depth (h of the protrusion of back sheet ₄) be 0mm.In addition, for the drosal part of test body 12A, cut with long side direction 40mm, width 70mm from diaper end portion side, it can be used as the test body 12B of comparative example 22.Further, for the drosal part of test body 12A, with test body 12B differently, cut with long side direction 45mm, width 130mm from diaper end portion side, it can be used as the test body 12C of comparative example 22.The cross sectional shape of test body 12B and 12C is the sag and swell as medelling ground in Figure 23 (c) represents.In addition, the positive dough sheet of this test body is the two-layer structure of irregular upper strata and smooth lower floor, is expressed as upper strata 11 and lower floor 12 in the schematic diagram of Figure 23 (c).

［ comparative example 23 ］

In the test body 11A of comparative example 21, obtain the test body of the smooth diaper positive dough sheet being changed into no concave-convex.It can be used as the test body 13A of comparative example 23.At this end laminated section, there is not recess in the back side of positive dough sheet, therefore the degree of depth (the h of recess ₁) and the penetration depth (h of protrusion of back sheet ₄) be 0mm.In addition, for the drosal part of test body 13A, cut with long side direction 40mm, width 70mm from diaper end portion side, it can be used as the test body 13B of comparative example 23.And then, for the drosal part of test body 13A, different from test body 13B, cut with long side direction 45mm, width 130mm from diaper end portion side, it can be used as the test body 13C of comparative example 23.The cross sectional shape of test body 13B and 13C is the structure as medelling ground in Figure 23 (d) represents.

[evaluation]

For each disposable diaper test body of above-mentioned middle making, by following method evaluation liquid fluidity, retractility.Its result is shown in 3 and represents.

[method of liquid flow test]

Use can apply the acrylic panel on arbitrarily angled making inclined-plane.Make this acrylic panel keep level, the mode above being positioned at positive dough sheet thereon loads and fixation test body 1B and 11B ~ 13B.Then, acrylic panel is made to keep level, for test body 1B and 11B ~ 13B, from be equivalent to the drosal part before cutting diaper long side direction end (the end 20a of the diaper 20 of Figure 13) part leave 30mm part the artificial urine of the redness of 500 μ l is slowly dripped with the speed of 100 μ l/s.Thereafter, static placement 1 minute, measures diffusion length now, and the profile spread by liquid is described to transparent OHP sheet.Diffusion length express liquid is from dripping a little to the displacement of end (side of inclination).

Then, acrylic panel is made to keep the part being equivalent to drosal part end (the end 20a of the diaper 20 of Figure 13) to tilt the state of 30 ° downwards, static placement 3 minutes.Again measure diffusion length now, and the profile spread by liquid is described to transparent OHP sheet.Diffusion area is image by scanner scanning OHP sheet and uses image analysis software Image-ProPlus(NIPPONROPER to manufacture) calculate.Then, using after diffusion length and diffusion area dripping separately with tilt after difference as flow distance and flow area.

Above-mentioned measurement respectively carries out 6 times, the evaluation result that its meansigma methods is tested as liquid flow is represented in following table 3.In addition, the state of the expansion of the liquid after the dripping of each test body and after tilting is represented with in photo at the replacement figure of Figure 24.Figure 24 is the photo taking each test body from positive dough sheet side.The scope of the expansion of liquid is the region being expressed as the low-light level such as black or Lycoperdon polymorphum Vitt color relative to the positive dough sheet of white background.

In addition, above-mentioned diffusion area and diffusion length be when placing projection arrangement and irradiate light below sample through and the diffusion zone of the artificial urine of redness that obtains.In addition, diffusion length is to artificial urine to the length of front end of partial-flow being equivalent to drosal part end 20a from the central point that drips.The composition of the artificial urine used is carbamide 1.94 quality %, sodium chloride 0.795 quality %, magnesium sulfate 0.11 quality %, calcium chloride 0.062 quality %, potassium sulfate 0.197 quality %, Amaranth (dyestuff) 0.010 quality %, water 96.88 quality % and polyoxyethylene laurel ether EO add molal quantity 41(about 0.07%), surface tension is adjusted to 53 ± 1dyne/cm(23 DEG C).

[method of retractility test]

For test body 1C and 11C ~ 13C, by the end winding support that is equivalent on the direction in the diaper width direction (X-direction) before cutting, at autoplotter (autograph), (Shimadzu Seisakusho Ltd. manufactures: on the chuck at trade name AG-X1KN) two ends, to make to become 70mm between chuck.Operation 5 circulation of initial point is back to after repeating the speed tensile that divides with 300mm/ to the stress reaching 6N.Measure in first time circulation go in journey (during load-elongation) and return (when removing force is shunk) process with 1,2,3, elongation that each stress of 4N is corresponding, when being recorded in each stress go journey and return poor as " first circulate go the variable of journey and return poor ".In addition, equally, measure corresponding with each stress first and circulate and the 5th elongation going journey circulate, the difference of record two circulation is as " first circulate and the 5th circulates go the displacement of journey poor "." first circulation go the variable of journey and return poor " is less be when representing elongation and contraction time the deformation of end laminated section of diaper less and restorative well.Therefore, make diaper extend and be clothed to waist place at first if represent, then laxly lessly can obtain good conformability." first circulation with the 5th circulate go the displacement of journey poor " even if less is represent repeatedly to stretch, flexible response is also good.Therefore, also still follow even if represent to change at waist because of the activity etc. of wearer after diaper is dressed, good conformability can be obtained.

The evaluation result of " first circulation go the variable of journey and return poor " is represented in following table 4, " first circulate and the 5th circulates go the displacement of journey poor " is represented in table 5.

[table 3]

(diffusion length: mm)

[table 4] (first circulation go the variable of journey and return poor)

［ table 5 ］ (first circulation with the 5th circulate go the displacement of journey poor)

From the result of the diffusion length of table 3, after dripping, (keep the state without external force of level), the test body of embodiment 21 is with comparative example 21 compared with comparative example 22,23, and diffusion length is very short, and liquid is difficult to mobile.In comparative example 22, after just dripping, liquid is long range diffusion immediately, even arrives end thus produce to leak.Also be after just dripping, just can see that liquid diffuses to situation near end and liquid even arrives end and produces the situation of leakage in comparative example 23.In addition, after tilting be applied with external force when, the enlarged degree that the test body of embodiment 21 spreads from the liquid of (keeping the state without external force of level) after dripping is less, and liquid does not arrive end, does not produce leak of liquid.On the other hand, spread in relatively little comparative example 21 after dripping and only reach in the test body near end in the diffusion of comparative example 23, all produce leakage and arrive end.

In addition, from the result of the diffusion area of table 3, in the test body of embodiment 21, be difficult to spread easily comparatively greatly to the resistance of flowing, the retentivity of liquid is larger.On the other hand, known in comparative example 21, though keeping the retentivity of the liquid under level comparatively large, less to the resistance of flowing, easily make diffusion be easy to expand by distortion during applying external force or inclination.In addition, in comparative example 22,23, back sheet is smooth, therefore less to the resistance of liquid diffusion, therefore from just long range diffusion immediately after dripping.

Consequently, the black of diffusion of express liquid in the replacement figure photo of Figure 24 or the pattern of the low-light level of Lycoperdon polymorphum Vitt also display clearly.No matter in any situation of the test body 1B of embodiment 21 after dripping and after tilting, above-mentioned pattern is all less and do not arrive end side.In contrast, in comparative example 21, after dripping, pattern is less, but after tilting, liquid diffuses to end side, and in comparative example 22, after dripping, above-mentioned pattern just arrives end side immediately.In comparative example 23, above-mentioned pattern also arrives near end.Particularly in comparative example 22 and 23, after dripping, pattern just expands on a large scale.

And, from the result of table 4 and table 5, in the test body of embodiment 21, " first circulation go the variable of journey and return poor " and " first circulate and the 5th circulates to go the position Yi of journey to measure poor " is all less, and the test body of comparative example 21 no less than use fibre web figuration sheet.Known accordingly, the test body of embodiment 21 does not hinder the telescopicing performance of fibre web figuration sheet, less by the deformation of extending the sheet caused, and flexible response is good.Therefore known, comprise this test body structure end laminated section diaper in, even if from the state next to the skin when dressing because of the postural change of wearer or to have a meal etc. and make abdominal circumference produce variation, the waistline of diaper is also easily followed, and not easily occurs gap.

About the 3rd embodiment, following embodiment 31 and comparative example 31 ~ 33 are disclosed.

［ embodiment 31 ］

Make to be fixed on fibre web size enlargement apparatus by the fibre web of core to be polyethylene terephthalate and sheath the be sheath-core type conjugate fiber that polyethylene is formed, to the fibre web blowing hot-air on its pedestal, along the projection in said base, figuration is carried out to fibre web, and make each fiber fusion, form the positive back side therefrom and be the concaveconvex shape (pitch (w between the top 8a-8a of back side recess ₁) degree of depth (h of 5mm and back side recess ₁) 2mm) and the figuration sheet of the shape shown in Fig. 4, and it can be used as positive dough sheet to use.As sublayer, use grammes per square metre 40g/m ²hydrophilic hot-wind nonwoven cloth.Stack gradually liquid-impermeable back sheet, (paper pulp grammes per square metre is for 200g/m to cover absorbent core with hydrophilic paper ², superabsorbent polymer grammes per square metre is 286g/m ²) absorber, sublayer, positive dough sheet, by the bonding each several part of heat fusing.Bonding between sublayer with positive dough sheet is the spiral pattern using heat fusing, and the abutting part of sublayer and positive dough sheet back side protuberance is mixed by the part of bonding part and non-adhesive and exists.By this laminated samples is being pressed suitable condition lower seal with the diaper that Kao Corp manufactures " the Merries dry and comfortable vapor-permeable type M code " encapsulation that (trade name) Existing commercial product are identical and room temperature preservation 1 month, forming the concaveconvex structure of sublayer and the density structure of fiber.

Fibre density (the m of the compact part of this sublayer ₆₁) and the fibre density (m of part of rarefaction ₆₂) ratio (m ₆₁/ m ₆₂) be 1.65.

［ comparative example 31 ］

After the laminated samples being made embodiment 31 and the sample preserved of unsealing as the sample of comparative example 31.The sublayer of this sample is that the density being set to sag and swell and the fiber do not had as the sample of embodiment 31 constructs and keeps smooth shape.

［ comparative example 32 ］

By in the formation of the laminated samples of embodiment 31, not stacked sublayer and direct stacked absorber and positive dough sheet between absorber and positive dough sheet, and the sample of unsealing preservation is as the sample (without sublayer) of comparative example 32.

［ comparative example 33 ］

The commercially available disposable diaper (trade name " Merries dry and comfortable vapor-permeable type M code ") Kao Corp manufactured is as the sample of comparative example 33.This sample uses that the side, skin face of figuration is side, concavo-convex and non-skin face by heat seal is the smooth positive dough sheet of bilayer, and be configured with the diaper of sublayer.

[performance evaluation]

For the sample (disposable diaper) of embodiment and comparative example, measure and return liquid measure and soak time, liquid residue at positive dough sheet when segmentation under pressurized conditions is injected.As determination test, undertaken by two kinds of tests of following (1) and (2).

(test 1)

First, for each sample of embodiment 31 and comparative example 31 ~ 33, the absorber width central part from veutro absorber end to back end 155mm place on long side direction of the sample of planar development is set to liquid injection point.The acrylic panel of the injection unit of subsidiary cylindrical shape is placed on sample in the mode of the liquid injection point of sample in the central authorities of injection unit, and then places counterweight on this acrylic panel, apply 2.0kPa(20gf/cm ²) load.Cylinder (the being highly 53mm) shape of the injection unit being arranged on acrylic panel to be internal diameter be 36mm, at acrylic panel, be formed the part of the central axis of this cylindric injection unit and 1/3 of long side direction, width central shaft consistent, the internal diameter be communicated with between the inside of this cylindric injection unit and the positive dough sheet opposite face of acrylic panel is the through hole of 36mm.

Maintain the liquid height of 10mm and inject 40g artificial urine from injection unit.Using from be injected into artificial urine from the time till positive dough sheet disappears as soak time.The composition of artificial urine is carbamide 1.94 quality %, sodium chloride 0.795 quality %, magnesium sulfate 0.11 quality %, calcium chloride 0.062 quality %, potassium sulfate 0.197 quality %, Amaranth (dyestuff) 0.0l0 quality %, water 96.88 quality % and polyoxyethylene laurel ether EO add molal quantity 41(about 0.07%), and surface tension is adjusted to 53 ± 1dyne/cm(23 DEG C).

With 10 minutes for the injection of 4 these artificial urine is carried out and static placement after 10 minutes in interval, removal counterweight and acrylic panel, overlapping placement 16 filter paper (ADVANTEC5C10mm × 10mm) on sample, and then place counterweight thereon, apply 3.4kPa(35gf/cm ²) load.Placing after 2 minutes in this case, measuring the quality of the artificial urine absorbed by filter paper, using this amount as returning liquid measure.

(test 2)

For each sample of embodiment 31 and comparative example 31 ~ 33, the absorber width central part from veutro absorber end to back end 155mm on long side direction of the sample of planar development is set to liquid injection point.In advance centered by decanting point around it (10mm × 20mm) positive dough sheet on engrave vestige, use pump to inject 80g artificial urine with the speed of 5g/sec.In static placement after 10 minutes, slowly peel positive dough sheet quality measurement.Draw the artificial urine absorbed by positive dough sheet with absorbent paper etc., positive dough sheet placed and makes for 1 evening it dry, using deduct from above-mentioned quality dry after the weight that obtains of quality as liquid residue.

Above-mentioned evaluation result is represented in following table 6.In addition, the sample used in aforesaid liquid residue test is represented by Figure 30 and 31.Figure 30 represents the state after the test enforcement of the positive dough sheet of the test body of embodiment 31, and Figure 31 represents the state after the test enforcement of the positive dough sheet of the test body of comparative example 31.Any one in Figure 30 and Figure 31 is all that (a) represents the side, skin contact face of positive dough sheet, (b) represents side, non-skin contact face, (c) is the replacement accompanying drawing photo represented by (b) partial enlargement.Replacing arbitrarily in accompanying drawing photo, the equal express liquid of black part remains.

(table 6)

From the result shown in table 6, in the diaper (comparative example 33) by the positive dough sheet of bilayer of heat seal and figuration, even if under an increased pressure, the concavo-convex of side, positive dough sheet skin face does not also enter sublayer and maintains space, therefore infiltration rate is fast, but be held in the amount of liquid of positive dough sheet inside as liquid residue and return liquid measure, the disposable diaper of embodiment 31 and comparative example 31,32 is less.This is because, in the disposable diaper of embodiment 31 and comparative example 31,32, be concaveconvex shape due to positive dough sheet and be 1 layer, thus particularly under an increased pressure thickness reduce, and the back side protuberance of this positive dough sheet enters into absorber or the sublayer of more lower.

And, if to having the embodiment 31 of sublayer and comparative example 31 to compare with the disposable diaper without the comparative example 32 of sublayer, then known, sublayer is suppressing back to play larger effect in liquid measure, particularly when segmentation of pressurizeing is injected, liquid measure is made back significantly to reduce because there is sublayer.In addition, according to becoming fluffy (volume is large) because there is sublayer and temporarily keeping liquid to carry out the effect of spreading in the in-plane direction, known compared with the comparative example 32 without sublayer soak time fast.

In addition, the disposable diaper of embodiment 31 is compared with comparative example 31, and reduce back liquid measure further, soak time shortens to the degree no less than comparative example 33, thus improves the original function in sublayer.In addition, compared with comparative example 31, liquid residue is inhibited.This situation is according to following state aware, that is, the black of the liquid residue in Figure 30 (embodiment 31) is obviously than shallow in Figure 31 (comparative example 31).The result that the liquid residue of this embodiment 31 suppresses represents, " if having sublayer; then to become distance absorber comparatively far away and make less than the water absorbing force of absorber has because positive dough sheet; be easy to make the liquid residue quantitative change of positive dough sheet many " this problem (comparative example 31) can be overcome, liquid residue is suppressed lower, the level equal with the comparative example 32 without sublayer can be reached.That is, the disposable diaper of the concavo-convex sublayer of known use embodiment 31 realizes having the advantage of sublayer and the diaper without the excellence of the advantage of sublayer.

The present invention and embodiment thereof are together illustrated, as long as but the present inventor etc. do not specify, then illustrated arbitrary details does not all limit the present invention, and thinks and should broadly can make an explanation under the spirit not departing from the invention shown in the scope of the application and scope Qing Condition.

The application be based on July 7th, 2011 the Patent 2011-151210 in Japanese publication patent, the Patent 2011-258874 in Japanese publication patent and 2012 on November 28th, the 2011 Patent 2012-025123 of 8, on February in Japanese publication patent and CLAIM OF PRIORITY, at this, these to be applied for etc. all using the form of reference during the part that its content is recorded as this description is incorporated herein.

Claims (38)

1. an absorbent commodity, it has the positive dough sheet of the liquid permeability being configured at side, skin contact face, the back sheet being configured at side, non-skin contact face and the absorber arranged between these two sheets, it is characterized in that:

Described positive dough sheet is made up of non-woven fabrics, and described absorber has absorbent core and covers the emulsion sheet of this absorbent core,

In the side, non-skin contact face of described positive dough sheet, multiple back side recess to side, skin contact face depression is adjacent to be distributed, and described emulsion sheet enters into this back side recess, between this emulsion sheet entered and described absorbent core, have spatial portion,

Described absorbent commodity has end laminated section, this end laminated section is by outside the long side direction end of described absorber, between described positive dough sheet and described back sheet, this absorber is not set and make described positive dough sheet and described back sheet directly or indirectly stacked and laminating form, multiple one variant parts that the opposite face that described end laminated section has described positive dough sheet and described back sheet is out of shape to convex integratedly in a thickness direction, the plurality of one variant part is distributed on the in-plane of described end laminated section.

2. absorbent commodity as claimed in claim 1, is characterized in that:

The side, non-skin contact face of described positive dough sheet becomes concaveconvex shape by the periodic arrangement of described back side recess.

3. absorbent commodity as claimed in claim 1, is characterized in that:

The side, skin contact face of described positive dough sheet is concaveconvex shape.

4. absorbent commodity as claimed in claim 1, is characterized in that:

The side, skin contact face of described absorbent core is smooth shape.

5. absorbent commodity as claimed in claim 1, is characterized in that:

The cup depth of the depth ratio above-mentioned back side recess of the inlet portion that a part for described emulsion sheet enters into described back side recess and formed is shallow.

6. absorbent commodity as claimed in claim 1, is characterized in that:

The penetration depth of the described emulsion sheet in the described back side recess of described positive dough sheet is more than 50% of the cup depth of described back side recess.

7. absorbent commodity as claimed in claim 1, is characterized in that:

In the recess of the described back side, between described positive dough sheet and the entering part of described emulsion sheet, there is clearance portion.

8. absorbent commodity as claimed in claim 1, is characterized in that:

There is the part that described emulsion sheet and described positive dough sheet are engaged in the recess of the described back side.

9. absorbent commodity as claimed in claim 5, is characterized in that:

Above-mentioned back side recess is the depression of the non-skin contact side of above-mentioned positive dough sheet, and being formed from top towards the sidewall portion of bottom of being formed by the positive dough sheet caved in along this.

10. absorbent commodity as claimed in claim 9, is characterized in that:

The sidewall portion being formed with above-mentioned back side recess abuts and the junction surface be engaged with above-mentioned inlet portion.

11. absorbent commodities as claimed in claim 10, is characterized in that:

Above-mentioned junction surface makes the fiber of above-mentioned emulsion sheet and above-mentioned positive dough sheet put joint each other by spray Tu bonding agent.

12. absorbent commodities as claimed in claim 1, is characterized in that:

Be configured with multiple back sides recess and multiple back sides protuberance in the side, non-skin contact face of described positive dough sheet, back side protuberance described in each is surrounded and separate configuration by multiple described back sides recess, and the space of described back side recess is interconnected.

13. absorbent commodities as claimed in claim 1, is characterized in that:

Described back side recess have be made up of positive dough sheet top, sidewall portion and bottom, and the density of the non-woven fabrics fiber of this positive dough sheet has the density contrast or density gradient that increase to bottom from described top.

14. absorbent commodities as claimed in claim 1, is characterized in that:

Described absorbent core has the density structure of fibre density, and the part that the sparse part of the density with this absorbent core is overlapping with described spatial portion.

15. absorbent commodities as claimed in claim 1, is characterized in that:

Described emulsion sheet is engaged by hot-melt adhesive discontinuously with described absorbent core.

16. absorbent commodities as claimed in claim 1, is characterized in that:

In the cross section of described back side recess, become large from side, skin face to side, non-skin face fibre density.

17. absorbent commodities as claimed in claim 1, is characterized in that:

Described positive dough sheet in the laminated section of described end and the opposite face of described back sheet, when the cross-section of long side direction, the distortion formed by described one variant part has shape of crawling in a thickness direction.

18. absorbent commodities as claimed in claim 1, is characterized in that:

In the side, non-skin contact face of described positive dough sheet, multiple back side recess to side, skin contact face depression is adjacent to be distributed, and described back sheet enters into the described back side recess of described end laminated section, forms described one variant part.

19. absorbent commodities as claimed in claim 1, is characterized in that:

Described back side recess in the laminated section of described end is the depression of roughly cone shape.

20. absorbent commodities as claimed in claim 1, is characterized in that:

Described positive dough sheet is made up of the non-woven fabrics on two sides with concaveconvex shape.

21. absorbent commodities as claimed in claim 1, is characterized in that:

In the laminated section of described end, between described positive dough sheet and described back sheet, be configured with elastomeric element in the direction of the width.

22. absorbent commodities as claimed in claim 1, is characterized in that:

In the laminated section of described end, between described positive dough sheet and described back sheet, be configured with the sheet be made up of non-woven fabrics.

23. absorbent commodities as claimed in claim 1, is characterized in that:

In the side, non-skin contact face of described positive dough sheet, protuberance dispersion in the back side exists and forms concaveconvex shape, and between this positive dough sheet and described absorber, be configured with the sublayer of liquid permeability, this sublayer contacts in abutment portion with the back side protuberance of described positive dough sheet,

The fibre density of the described sublayer of described abutment portion is higher than the fibre density of other parts of this sublayer.

24. absorbent commodities as claimed in claim 23, is characterized in that:

The peripheral part of the described back side protuberance of the side, non-skin contact face of described positive dough sheet forms the back side recess from side, side direction skin contact face, non-skin contact face depression, between this back side recess and described sublayer, be formed with recess spatial portion, the fibre density being positioned at the described sublayer of the position of this recess spatial portion is lower than the fibre density of the described sublayer abutted with described back side protuberance.

25. absorbent commodities as described in claim 23 or 24, is characterized in that:

The described back side protuberance of described positive dough sheet and the abutment portion of described sublayer be, the fibrous structure that the interfibrous gap of two parts is maintained.

26. absorbent commodities as claimed in claim 23, is characterized in that:

To mix with the abutment portion of described sublayer at the back side protuberance of described positive dough sheet and have bonding portion and non-adhesive part.

27. absorbent commodities as claimed in claim 23, is characterized in that:

In the back side protuberance of described positive dough sheet and the abutment portion of described sublayer, described sublayer forms the recess to side, non-skin contact face depression, and the back side protuberance of described positive dough sheet enters the recess of this sublayer and contacts with it.

28. absorbent commodities as claimed in claim 23, is characterized in that:

The region area of the abutment portion of described sublayer and back side protuberance is more than 1/20 relative to the ratio of the area of the sheet of described sublayer and is less than 2/5.

29. absorbent commodities as claimed in claim 23, is characterized in that:

Be 15/mm with the fibre density of the sublayer in the abutment portion of the back side protuberance of described positive dough sheet ²above and be 120/mm ²below.

30. absorbent commodities as claimed in claim 23, is characterized in that:

Above-mentioned sublayer is made up of hot-wind nonwoven cloth.

31. absorbent commodities as claimed in claim 23, is characterized in that:

In above-mentioned sublayer, the thickness of the part of rarefaction that the thickness of the compact part that the fibre density of above-mentioned abutment portion is high is low relative to fibre density compared with this compact part is more than 30% and less than 90%.

32. absorbent commodities as claimed in claim 23, is characterized in that:

The fibre density of the non-woven fabrics of the above-mentioned positive dough sheet in the recess of the above-mentioned back side has the density contrast or density gradient that increase to bottom from top.

33. absorbent commodities as claimed in claim 1, is characterized in that:

Above-mentioned positive dough sheet is made up of hydrophilic non-woven fabrics.

34. absorbent commodities as claimed in claim 1, is characterized in that:

Above-mentioned back sheet is by having water proofing property and the porous membrane with poisture-penetrability and breathability is formed.

35. absorbent commodities as claimed in claim 1, is characterized in that:

Above-mentioned absorbent core is made up of paper pulp fiber and superabsorbent polymer.

36. absorbent commodities as claimed in claim 1, is characterized in that:

Above-mentioned emulsion sheet is made up of hydrophilic thin paper.

37. absorbent commodities as claimed in claim 1, is characterized in that:

Absorbent commodity is flat type disposable diaper.

38. absorbent commodities as claimed in claim 1, is characterized in that:

Absorbent commodity is pull-on disposable diaper.