CN104703567A

CN104703567A - Disposable diaper

Info

Publication number: CN104703567A
Application number: CN201380050640.7A
Authority: CN
Inventors: 藤中知子; 福田优子; 佐藤信也; 一万田俊明
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2012-10-31
Filing date: 2013-10-01
Publication date: 2015-06-10
Anticipated expiration: 2033-10-01
Also published as: RU2636916C2; RU2015120553A; TW201424704A; CN104703567B; WO2014069142A1; TWI604833B

Abstract

This disposable diaper (1) has a side panel (3) which extends outward in the X direction attached to each of both sides (2S) of one end side of an absorbent body (2) in the Y direction which comprises an absorbent (23) with liquid retention properties, and a fastening tape (4) which extends outward in the X direction attached to an exterior side (3S) that extends along the Y direction of the side panel (3). The fastening tape (4) is bonded to one side of the side panel (3) via a bonding region (6). The bonding region (6) comprises a first bonding region (6S) which is bonded by an adhesive and a non-bonded region (7) or a second weak bonding region (6W) which is disposed adjacent to the first bonding region (6S) on the exterior side in the X direction and has a bonding strength that is weaker than that of the first bonding region (6S).

Description

Disposable diaper

Technical field

The present invention relates to a kind of flat type disposable diaper.

Background technology

Always, there will be a known the disposable diaper with the flank sheet extended from the both side edges of absorbent main body respectively.As the disposable diaper with flank sheet (retractility flank sheet), the applicant had previously proposed just like upper disposable diaper: arrange non-telescoping portion at the lateral part along main body long side direction of retractility flank sheet, in this non-telescoping portion will not form the elastomeric element of retractility flank sheet and form the tab member joint (with reference to patent documentation 1) of flank sheet (retractility flank sheet).According to the diaper described in patent documentation 1, do not engage above-mentioned elastomeric element and above-mentioned tab member in above-mentioned non-telescoping portion, therefore the flexibility of the lateral part of retractility flank sheet improves, and the stability maintenance of above-mentioned elastomeric element also improves.

In addition, as the disposable diaper with flank sheet (retractility flank sheet), the applicant had previously proposed just like upper disposable diaper: be formed with separating in body width direction: the 1st set portion, and it is fixed with the hook side band forming magic tape and the plate substrate forming magic tape; With the 2nd set portion, it is fixed with magic tape and retractility waist panel, wherein, the lower ora terminalis of the main body long side direction in the 2nd set portion is positioned at the lower ora terminalis position by the top of the main body long side direction than the 1st set portion, and leaves (with reference to patent documentation 2) from the lower ora terminalis of the main body long side direction of the plate substrate of formation magic tape.According to the diaper described in patent documentation 2, according to the configuration relation in above-mentioned 1st set portion and above-mentioned 2nd set portion, the hook side band forming magic tape is not easily peeled off from the plate substrate forming magic tape, thus use sense improves.

Prior art document

Patent documentation

Patent documentation 1: Japanese Patent Laid-Open 2012-135446 publication

Patent documentation 2: Japanese Patent Laid-Open 2012-120663 publication

Summary of the invention

But in the diaper described in patent documentation 1, the band base material forming magic tape is fixed via the engaging zones of uniform adhesive strength with the tab member forming retractility flank sheet.So, if fix via the engaging zones of uniform adhesive strength, then when wearing diaper when with pull stretch magic tape and excessive hot strength is applied to this engaging zones time, cause wood destruction sometimes and be difficult to maintain the wearing effect of diaper.The side edge part of this wood destruction easily in the magic tape side of this engaging zones produces, and the two ends of the side edge part of the especially easy magic tape side at this engaging zones produce.So, in the diaper described in patent documentation 1, with regard to the viewpoint that the use sense with regard to maintaining the wearing effect of diaper improves, there is the leeway of improvement.In addition, in the diaper described in patent documentation 2, magic tape and retractility waist panel are also fixed via the 2nd set portion of uniform adhesive strength, therefore cause wood destruction in the same manner as the diaper described in patent documentation 1 sometimes, have the leeway of improvement with regard to the viewpoint that use sense improves.

Therefore, the invention provides a kind of when wearing diaper, magic tape and flank sheet are not easily damaged because causing wood destruction, thus the disposable diaper that use sense improves.

In addition, in the diaper described in patent documentation 1, the band base material forming magic tape is fixed from the lateral border of the tab member forming retractility waist panel with the width of regulation.So, if band base material and the lateral border of tab member are as one man fixed, then when wearing diaper, when with pull stretch magic tape and retractility waist panel is extended time, have the edge, periphery of retractility waist panel towards the situation of non-skin opposite face side bending.Under the state to non-skin opposite face side bending, by the set portion pressing being positioned at the magic tape of the dorsal part of wearer be positioned at wearer veutro take sheet carrying out set time, such as on diaper, easily tangle clothes in habited situation, with regard to the viewpoint that use sense improves, have the leeway of improvement.In the diaper described in patent documentation 2, the 2nd set portion being fixed with magic tape and retractility waist panel is also as one man formed with the lateral border of retractility waist panel, therefore there is the situation of edge, periphery towards non-skin opposite face side bending of retractility waist panel in the same manner as the diaper described in patent documentation 1, with regard to the viewpoint that use sense improves, have the leeway of improvement.

Therefore, problem of the present invention is to provide one when wearing diaper, and the edge, periphery of retractility waist panel is easy to towards skin opposite face side, thus the disposable diaper that use sense improves.

For the technical scheme of dealing with problems

The present invention is a kind of disposable diaper, it comprises the absorbent main body of lengthwise, this absorbent main body comprises the absorber of liquid retainability, the back sheet of the positive dough sheet being configured at the skin opposite face side of this absorber and the non-skin opposite face side being configured at this absorber, and this absorbent main body is divided into the veutro portion of the veutro being positioned at wearer when wearing, in drosal part and the crotch that is configured between this veutro portion and this drosal part of dorsal part, the retractility flank sheet extended outside width is separately installed with in the both sides of the end side of the long side direction of above-mentioned absorbent main body, at the lateral part along main body long side direction of this retractility flank sheet, the magic tape extended outside width is installed.Above-mentioned magic tape is installed on the non-skin opposite face of above-mentioned retractility flank sheet.Above-mentioned magic tape is spaced apart to above-mentioned absorbent main body side from the lateral border along main body long side direction of above-mentioned retractility flank sheet, and via the 1st engaging zones utilizing bonding agent to engage and the chip bonding of above-mentioned retractility flank.Between above-mentioned engaging zones and the lateral border of above-mentioned retractility flank sheet, throughout main body long side direction formed continuously endlong non-set out region that above-mentioned magic tape and above-mentioned retractility flank sheet do not engage or than above-mentioned 1st engaging zones by configure adjacently outside width and bond strength is weaker than the 2nd weak engaging zones of above-mentioned 1st engaging zones.

Accompanying drawing explanation

Fig. 1 is the top view of the state after launching as the flat type disposable diaper of the present embodiment of the present invention's (the 1st invention) of observing from positive dough sheet side.

Fig. 2 is the amplification plan view of the state launched by the retractility flank sheet included by the flat type disposable diaper of Fig. 1 and make it extend.

Fig. 3 is the profile of the state of the contraction of the I-I line section of Fig. 1.

Fig. 4 is the figure of the state of retractility flank sheet when representing the flat type disposable diaper wearing Fig. 1.

Fig. 5 is the amplification plan view (being equivalent to the figure of Fig. 2) of the state launched by the retractility flank sheet included by the flat type disposable diaper of the 2nd embodiment as the present invention's (the 1st invention) and make it extend.

Fig. 6 is the top view of the state from the observation of positive dough sheet side, the flat type disposable diaper as the 1st embodiment of the present invention's (the 2nd invention) being extended and launch.

Fig. 7 is the amplification plan view of the retractility waist panel included by flat type disposable diaper of Fig. 6.

Fig. 8 is the I-I line profile of Fig. 7.

Fig. 9 is the amplification plan view of the state of retractility waist panel when representing the flat type disposable diaper wearing Fig. 6.

Figure 10 is the amplification plan view (being equivalent to the figure of Fig. 7) as the retractility waist panel included by the flat type disposable diaper of the 2nd embodiment of the present invention's (the 2nd invention).

Figure 11 is the amplification plan view (being equivalent to the figure of Fig. 7) as the retractility waist panel included by the flat type disposable diaper of the 3rd embodiment of the present invention's (the 2nd invention).

Figure 12 is the amplification plan view (being equivalent to the figure of Fig. 7) as the retractility waist panel included by the flat type disposable diaper of the 4th embodiment of the present invention's (the 2nd invention).

Figure 13 is the amplification plan view (being equivalent to the figure of Fig. 7) as the retractility waist panel included by the flat type disposable diaper of the 5th embodiment of the present invention's (the 2nd invention).

Figure 14 is the amplification plan view (being equivalent to the figure of Fig. 7) as the retractility waist panel included by the flat type disposable diaper of the 6th embodiment of the present invention's (the 2nd invention).

Detailed description of the invention

Below, for the disposable diaper of the present invention's (the 1st invention), based on its preferred present embodiment, be described with reference to Fig. 1 ~ Fig. 4.

As shown in Figure 1, the disposable diaper 1 (hereinafter also referred to " diaper 1 ") of present embodiment comprises the absorbent main body 2 of lengthwise, this absorbent main body 2 is longer at main body long side direction (Y-direction), the absorber 23 comprising liquid retainability, be configured at absorber 23 skin opposite face side positive dough sheet 21 and be configured at the back sheet 22 of non-skin opposite face side of absorber 23, and to be divided into when wearing at the veutro portion A of the veutro of wearer, at the drosal part B of dorsal part and the crotch C that is configured between veutro portion A and drosal part B.Diaper 1 as shown in Figure 1, in the end side of the long side direction (Y-direction) of absorbent main body 2, specifically be separately installed with the flank sheet 3 extended to width (X-direction) outside at the both sides 2S of drosal part B, the magic tape 4 extended to width (X-direction) outside is installed at the lateral part 3S along main body long side direction (Y-direction) of this flank sheet 3.

Diaper 1 is formed as symmetrical relative to centre line C L as shown in Figure 1.Therefore, in the following description, about symmetrical part, be described mainly for right side.

In addition, in this manual, the face of the skin side of wearer when so-called " skin opposite face " refers to wearing in the both sides of each parts forming diaper 1, is configured at, and the face identical with the face of " P " side in Fig. 3.In addition, towards the face of the opposition side of the skin side of wearer when so-called " non-skin opposite face " refers to wearing in the both sides of each parts forming diaper 1, and the face identical with the face of " Q " side in Fig. 3.

In addition, " Y " direction shown in each figure is the long side direction (main body long side direction) of the absorbent main body 2 of diaper 1, and be the direction parallel with centre line C L, " X " direction shown in each figure is the width (body width direction) of the absorbent main body 2 of diaper 1, and is the direction vertical with centre line C L.Below, particularly diaper 1 is described.

As shown in Figure 1, absorbent main body 2 has oblong-shaped longer in the Y direction, and comprises the back sheet 22 of the positive dough sheet 21 of liquid permeability, opaque liquid or difficult liquid permeability (comprising water-repellancy) and be arranged at the absorber 23 of the liquid retainability between above-mentioned two panels 21,22.As shown in Figure 1, positive dough sheet 21 and back sheet 22 cover whole of the skin opposite face of absorber 23 and whole of non-skin opposite face respectively, extend from the periphery of absorber 23, fixed by weldings such as bonding agent or heat sealing such as hot melts in the part of extending.Positive dough sheet 21 is identical with the length of back sheet 22 in the Y direction, but is formed as shorter than back sheet 22 in the X direction.It is identical with absorbent main body 2 that back sheet 22 is formed as plan view shape.

In addition, respectively at the both sides 2S along Y-direction of absorbent main body 2, sidepiece sheet 24 is configured with across positive dough sheet 21.Sidepiece sheet 24 arranges the whole region of the sidepiece 2S along Y-direction of the skin opposite face side be fixed as throughout positive dough sheet 21.Inner side (near the centre line C L) end of the X-direction of sidepiece sheet 24 becomes free end, three-dimensional fold formation elastomeric element 25 is fixed near the free end of crotch C with the state of extending in the Y direction arranging, when wearing, utilize the contractility of this elastomeric element 25, from free end, the part of Rack is left from positive dough sheet 21 and forms three-dimensional fold.

In addition, engage the sidepiece sheet 24 that extends outside X-direction and back sheet 22 at the both sides 2S along Y-direction of absorbent main body 2 respectively and be formed with wing flap portion.In diaper 1, as shown in Figure 1, leg creases formation elastomeric element 26 arranges the wing flap portion being fixed on crotch C with the state of extending in the Y direction, when wearing, utilizing the contractility of this elastomeric element 26 and forming leg creases.

As mentioned above, distinguish as shown in Figure 1 at the both sides 2S of the drosal part B of absorbent main body 2, the flank sheet 3 extended to width (X-direction) outside is installed, the magic tape 4 extended to width (X-direction) outside is installed at the lateral part 3S of this flank sheet 3.In diaper 1, as shown in Figure 3, being configured at the non-skin opposite face of back sheet 22 of sidepiece 2S, by various known method, flank sheet 3 is fixed with in the mode of extending outside X-direction from the lateral margin 2S1 of absorbent main body 2.Moreover in diaper 1, flank sheet 3 is fixed on the non-skin opposite face of back sheet 22, but also configurable be fixed on sidepiece 2S configure sidepiece sheet 24 and back sheet 22 between, in addition, also can be fixed on the skin opposite face of sidepiece sheet 24.In addition, in diaper 1, flank sheet 3 is the retractility flank sheets in X-direction with retractility.

As shown in Figures 2 and 3, retractility flank sheet 3 is formed at the skin lateral plate 31 in skin opposite face side and the multiple thread elastomeric element 33 fixing the state of extending in X direction between the non-skin lateral plate 32 of non-skin opposite face side in diaper 1.In addition, the length of the lateral part 3s along Y-direction of retractility flank sheet 3, is formed as the length of the Y-direction at engaging zones 6 of being longer than following magic tape 4.If describe in detail, then as shown in Figure 2, the retractility flank sheet 3 of diaper 1 is formed as rectangle expanding under plane state, and the skin lateral plate 31 and the non-skin lateral plate 32 that form retractility flank sheet 3 are also expanding under plane state, are formed as plan view shape identical with retractility flank sheet 3.Multiple elastomeric element 33 configures substantially in parallel along the X-direction of diaper 1 respectively, extends in X-direction.In addition, the multiple elastomeric elements 33 in retractility flank sheet 3 arrange roughly equal compartment of terrain configuration along Y-direction in diaper 1.Moreover in diaper 1, retractility flank sheet 3 is formed as rectangle, if but the length of the lateral border along Y-direction of retractility flank sheet 3, be formed as the length of the Y-direction at engaging zones 6 of being longer than magic tape 4, then also can be trapezoidal or comprise the shape of curve.

As mentioned above, the flank sheet 3 of diaper 1 is retractility flank sheet, but also can be the flank sheet without retractility.In addition, the retractility flank sheet 3 of diaper 1 between two non-woven fabrics (skin lateral plate 31 and non-skin lateral plate 32), arranges fixing multiple thread elastomeric element 33 and formed, but retractility flank sheet 3 also can be used in the complex arranging fixing elastomer film or the net that is made up of elastomer between two non-woven fabrics (skin lateral plate 31 and non-skin lateral plate 32) and replace thread elastomeric element 33.Moreover, when using thread elastomeric element 33, except its section is circular, foursquare elastomeric element, also comprise the elastomeric element of the narrow band shapes such as rectangle.

In addition, in the retractility flank sheet 3 of diaper 1, as shown in Figures 2 and 3, the skin lateral plate 31 and the non-skin lateral plate 32 that form retractility flank sheet 3 are formed as identical shape and identical size, but the size that skin lateral plate 31 and non-skin lateral plate 32 also can be different for the development length extended from the lateral margin 2S1 of absorbent main body 2.So, when using the different skin lateral plate 31 of the development length from lateral margin 2S1 to X-direction and non-skin lateral plate 32 to form retractility flank sheet 3, formed by a skin lateral plate 31 or non-skin lateral plate 32 outside the X-direction of the lateral part 3S of retractility flank sheet 3.Therefore, the pliability of the lateral part 3S of retractility flank sheet 3 improves.

About the thread elastomeric element 33 being configured at retractility flank sheet 3, with regard to the flexibility raising of retractility flank sheet 3 or the viewpoint guaranteed of retractility, its width (size of Y-direction) or diameter are preferably more than 0.1mm below 2mm, are more preferably more than 0.1mm below 1mm.In addition, the number being configured at the thread elastomeric element 33 of retractility flank sheet 3 is preferably about more than 1 less than 25, is more preferably more than 3 less than 20.In addition, percentage elongation can from existing known suitably select, stress when being stretched to percentage elongation 100% is arrange under the preferred state of extending in the scope of percentage elongation less than more than 50% 300% of 1 thread elastomeric element 33 of more than 0.1N below 1N to fix, and then under the state of preferably extending more than 100% and in the scope of less than 250%, arranging is fixed.Such as, moreover the length of the amount that percentage elongation is elongation and increases is relative to naturally long ratio, and when the elastomeric element of length 10cm being stretched to 20cm, its percentage elongation is 100%.

Moreover, when the fixing elastomer film of arranging or the net be made up of elastomer replace thread elastomeric element 33 and form retractility flank sheet 3, preferably the stress of every 25mm width when being stretched to percentage elongation 100% be more than 3N/25mm and arrange fixing formation under the net of the 25N/25mm state of extending in the scope of percentage elongation less than more than 50% 300%, so preferably more than 100% less than 250% scope in arrange fixing under the state of extending and formed.In addition, use elastomer film or the net be made up of elastomer replace thread elastomeric element 33 and form the situation of retractility flank sheet 3, also comprise by elastomer film or net are fixed on the arranging of non-elongate state the situation forming flank sheet between skin lateral plate 31 and non-skin lateral plate 32.In this case, in subsequent step, in order to give the extensibility to width to skin lateral plate 31 and non-skin lateral plate 32, implement stretch process in the width direction and form retractility flank sheet 3.The scope that the degree stretched is used elastomer film or the unbroken degree of net, the preferably scope of less than more than 50% 300%.

As shown in Figure 3, flank sheet 3 in diaper 1 has the bond layer be fixed on by multiple thread elastomeric element 33 between skin lateral plate 31 and non-skin lateral plate 32, this bond layer comprise the end side of absorbent main body 2 side of fixing each elastomeric element 33 main body side bond layer 35, fix the end side of the lateral part 3S side of the flank sheet 3 of this each elastomeric element 33 outside bond layer 36 and be configured at this main body side bond layer 35 and fix the middle bond layer 37 of two sheets 31,32 between bond layer 36 outside this.The middle region of bond layer 37 between main body side bond layer 35 and outside bond layer 36 is provided with multiple.Middle bond layer 37 width in diaper 1 is less than any one in above-mentioned two bond layers 35,36, and configures discontinuously in X direction at zone line 30.As shown in Figure 2, main body side bond layer 35, outside bond layer 36 and middle bond layer 37 and each elastomeric element 33 extend along Y-direction across, and the total length of Y-direction throughout retractility flank sheet 3.Therefore, the multiple thread elastomeric element 33 of elongation state is fixed between skin lateral plate 31 and non-skin lateral plate 32 via main body side bond layer 35, outside bond layer 36 and middle bond layer 37.Retractility flank sheet 3 is as following and formed, namely, by various known method, any one or both in skin lateral plate 31 and non-skin lateral plate 32 apply the bonding agent forming main body side bond layer 35, outside bond layer 36 and middle bond layer 37, make sheet above 31,32 overlapping after coating and pressurize, fixing the thread elastomeric element 33 of multiple elongation state thus.

Retractility flank sheet 3, as shown in Figure 3, is not arranging the position of elastomeric element 33, and skin lateral plate 31 and non-skin lateral plate 32 directly engage via main body side bond layer 35, outside bond layer 36 and middle bond layer 37 each other.Therefore, between main body side bond layer 35 and middle bond layer 37 adjacent with it, adjacent middle bond layer 37 each other and outside bond layer 36 and following between its middle bond layer 37 adjoined, being formed with skin lateral plate 31 does not respectively have bonding non-adhesive region 38 with non-skin lateral plate 32.Non-adhesive region 38 also intersects with all multiple elastomeric elements 33 as shown in Figure 2 in the same manner as bond layer 35,36,37, throughout the extending in the Y direction endlong of Y-direction of flank sheet 3.

In the flank sheet 3 of the diaper 1 formed in mode as above, elastomeric element 33 is fixed at main body side bond layer 35, front bond layer 36 and middle bond layer 37 with elongation state, under the naturalness that this elastomeric element 33 shrinks, as shown in Figure 3, multiple pleat is formed with on the two sides of flank sheet 3.Each pleat is formed extended at both sides along Y-direction in the mode of intersecting with multiple elastomeric element 33.As shown in Figure 3, be formed at the pleat of flank sheet 3, it is the contraction utilizing elastomeric element 33 between main body side bond layer 35 and front bond layer 36, two sheets 31,32 swell for convex in each non-adhesive region 38 to the direction left from elastomeric element 33, in each middle bond layer 37, become concavity towards elastomeric element 33 on the other hand to be formed, there is concaveconvex shape.This kind of pleat also not exclusively disappears under the wearing effect of diaper.

As shown in Figures 2 and 3, each elastomeric element 33 in the retractility flank sheet 3 so formed comprises by side (near centre line C L) anchor portion 33I in the fixing X-direction of main body side bond layer 35 with by the fixing foreign side anchor portion 33O of outside bond layer 36.

The length of the X-direction of foreign side anchor portion 33O, under the naturalness of the retractility flank sheet 3 shown in Fig. 2, is preferably the scope of less than more than 3% 20% of the total length of the X-direction of thread elastomeric element 33, and then is preferably the scope of less than more than 5% 15%.The length of the X-direction of interior side anchor portion 33I is also identical with the length of the X-direction of foreign side anchor portion 33O.Moreover, retractility flank sheet 3 except utilize bond layer 35,36,37 fixing except, also can combine and utilize melting of heat sealing etc. fixedly to implement to fix.

In diaper 1, the skin lateral plate 31 of retractility flank sheet 3 as shown in Figures 2 and 3, have the extension 31S extended outside X-direction than the foreign side anchor portion 33O of the X-direction of multiple thread elastomeric element 33, non-skin lateral plate 32 has the extension 32S extended outside X-direction than the foreign side anchor portion 33O of the X-direction of multiple elastomeric element 33 too.Extension 31S, 32S engage via following multiple involution junction surface 61 each other, and the plurality of involution junction surface 61 is formed by the crimping processing that utilizes embossing and carry out or heat sealing, ultrasonic sealing function.Extension 31S, 32S each other fixing also can impose bonding agent and replace above-mentioned involution junction surface 61, with regard to the viewpoint that the lateral part 3S of retractility flank sheet 3 is in use not easily curling, also can combine them.

Magic tape 4 is engaged in the one side of flank sheet 3 via engaging zones 6, in diaper 1, is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3 as shown in Figure 3.Specifically, in diaper 1, as shown in Figure 3, the interior side of the X-direction of magic tape 4 (near centre line C L) side is only installed on the extension 32S of foreign side anchor portion 33O by X-direction foreign side of the thread elastomeric element 33 of ratio in the non-skin lateral plate 32 forming retractility flank sheet 3, and is installed on the non-skin opposite face (face of Q side) of extension 32S.Magic tape 4, in diaper 1, is mounted near the end of being partial to the drosal part B side of the Y-direction of retractility flank sheet 3 as shown in Figure 2.Moreover in diaper 1, magic tape 4 is only installed on the non-skin opposite face of flank sheet 3, but also only can be installed on the skin opposite face of flank sheet 3.

If be described in detail the magic tape 4 of the lateral part 3S being arranged at retractility flank sheet 3, then magic tape 4 comprises band substrate sheets 41 and has the hook side part 42 of multiple engaging protrusion in the outside of the X-direction of band substrate sheets 41.Magic tape 4 is folded up before use, uses after launching as shown in Figure 3 in use.The magic tape 4 of diaper 1 is at the longer rectangle of X-direction as shown in Figure 2 in the deployed state.Magic tape 4 fixes hook side part 42 in the outside of the X-direction being formed as the band substrate sheets 41 identical with the plan view shape of magic tape 4 and formed.Moreover, at the outer surface of the veutro portion A of diaper 1, as shown in Figure 1, be provided with make hook side part 42 set of magic tape 4 take sheet 5.

As shown in Figure 2, engage magic tape 4 and the engaging zones 6 of flank sheet 3 comprise the 1st engaging zones 6S that engaged by bonding agent and than the 1st engaging zones 6S by width (X-direction) outside configure adjacently and bond strength is weaker than the 2nd weak engaging zones 6W of the bond strength of the 1st engaging zones 6S.Engaging zones 6 is formed at the whole region in magic tape 4 region overlapping with flank sheet 3.Engaging zones 6 comprises the 1st engaging zones 6S and the 2nd weak engaging zones 6W that adjoin each other.1st closes the two ends that region 6S and the 2nd weak engaging zones 6W is formed as the Y-direction throughout the magic tape 4 overlapping with flank sheet 3.And the 2nd weak engaging zones 6W that the 1st engaging zones 6S adjoins is formed between the lateral border 3S1 of the 1st engaging zones 6S and retractility flank sheet 3 as shown in Figure 2.Herein, the 1st engaging zones 6S such as has the bond strength that magic tape 4 is firmly fixed to cause the degree of wood destruction with the junction surface of flank sheet 3 when being stretched in X direction by magic tape 4.In addition, 2nd weak engaging zones 6W has the bond strength more weak than the bond strength of the 1st engaging zones 6S, such as, have the bond strength that magic tape 4 is fixed with the degree peeled off before causing wood destruction with the junction surface of flank sheet 3 when being stretched in X direction by magic tape 4.If have above-mentioned bond strength, then concrete bond strength indefinite, the firmly bond strength causing the degree of wood destruction of the 1st engaging zones 6S, be worth according to the intensity of base material and change, exemplarily, when flank sheet 3 be spun-bonded non-woven fabrics with the base material of the engagement side of magic tape 4, bond strength in material be about to destroy before hot strength, be more than 15N/25mm, below 40N/25mm left and right.

In addition, concrete bond strength indefinite, preferably the bond strength of the 2nd weak engaging zones 6W is less than more than 5% 70% relative to the bond strength of the 1st engaging zones 6S, is more preferably less than more than 20% 50%.

Below, record the assay method of the bond strength of the 1st engaging zones 6S and the engaging zones of the 2nd weak engaging zones 6W, but in the present invention's (the 1st invention), as long as have the relation of above-mentioned bond strength, other assay methods are also not particularly limited.

< bond strength assay method >

There is the sample of the 1st engaging zones 6S and the 2nd weak engaging zones 6W as measuring sample using at magic tape 4 and the coincidence part of flank sheet 3, utilize cupping machine (RTC-1150 that Orientec joint-stock company manufactures) to be that 300mm/min stretches with draw speed, the 2nd weak engaging zones 6W peels off at first.Using the bond strength of hot strength now as the 2nd weak engaging zones 6W.Maintain this state continued extension, using the hot strength that is about to cause before the material damage of flank sheet 3 or magic tape 4 as the 1st bond strength 6S.

In the 1st engaging zones 6S of diaper 1, as shown in Figure 2, engaged by bonding agent, and via the crimping processing utilizing embossing to carry out or by heat sealing, ultrasonic sealing function and multiple involution junction surface 61 of being formed and engage.In the 2nd weak engaging zones 6W of diaper 1, as shown in Figure 2, only via the crimping processing utilizing embossing to carry out or by heat sealing, ultrasonic sealing function and multiple involution junction surface 61 of being formed and engage.So, in diaper 1, the 1st engaging zones 6S is formed by bonding agent and involution, and the 2nd weak engaging zones 6W is formed by means of only involution, and therefore the 2nd weak engaging zones 6W has the bond strength more weak than the bond strength of the 1st engaging zones 6S.Moreover, in diaper 1, the 1st engaging zones 6S that bond strength is higher is formed by bonding agent and involution, the 2nd weak engaging zones 6W that bond strength is lower is formed by means of only involution, if but the 2nd weak engaging zones 6W has the bond strength more weak than the bond strength of the 1st engaging zones 6S, then such as the 1st engaging zones 6S and the 2nd weak engaging zones 6W can all be formed by means of only bonding agent, and the 1st engaging zones 6S and the 2nd weak engaging zones 6W also can all be formed by means of only involution.

Specifically, all formed by means of only bonding agent to make the 1st engaging zones 6S and the 2nd weak engaging zones 6W, such as make the adhesive applicating grammes per square metre of the 1st engaging zones 6S be less than the coating grammes per square metre of the 2nd weak bonding region 6W, make the coating grammes per square metre of the 1st engaging zones 6S be 10 ~ 50g/m ², the coating grammes per square metre of the 2nd weak engaging zones 6W is reduced to less than 50% relative to the coating grammes per square metre of the 1st engaging zones 6S, is preferably less than 20%.Or the 1st engaging zones 6S carries out the coating of whole of bonding agent, the 2nd weak engaging zones 6W will be coated with on width as the painting wiring of the bonding agent of linearity arranges multiple discontinuously along long side direction and be applied as striated.As the 3rd method, also can apply the bonding agent of general thermoplastic resin such as styrene butadiene styrene block copolymer (SBS) (SBS), styrene isoprene styrene block copolymer (SIS) (SIS) ldpe resin, vinyl acetate resins etc. as the coating of the 2nd weak engaging zones 6W, apply firmly copolyamide thermoplastic resin as the bonding agent being coated on the 1st engaging zones 6S.

When forming the 1st engaging zones 6S and the 2nd weak engaging zones 6W by means of only bonding agent, such as can change the coating method applying the 1st engaging zones 6S by entire surface, apply the such bonding agent of the 2nd weak engaging zones 6W discontinuously, or change the coating amount of bonding agent and formed.

In addition, when forming the 1st engaging zones 6S and the 2nd weak engaging zones 6W by means of only the involution such as heat sealing or ultrasonic sealing function, such as can by the fusing point of the 1st engaging zones 6S at the fiber with the skin lateral plate 31 or non-skin lateral plate 32 that form flank sheet 3, or carry out involution under the temperature conditions that matches of the fusing point of fiber forming band substrate sheets 41 and formed, 2nd weak engaging zones 6W is low by about 0 ~ 20% at the fusing point of the fiber than the skin lateral plate 31 or non-skin lateral plate 32 that form flank sheet 3, or carry out involution under the temperature conditions of the fusing point low about 0 ~ 20% of the fiber of ratio formation band substrate sheets 41 and formed.

In addition, also the crimping carried out can be processed and the involution portion formed for formation the 1st engaging zones 6S and the 2nd weak engaging zones 6W by utilizing embossing.Such as, under the state of the temperature below the fusing point of the fiber of the fusing point and formation band substrate sheets 41 that knurling rolls homoiothermic are extremely formed the skin lateral plate 31 of flank sheet 3 or the fiber of non-skin lateral plate 32, each component parts stacked after, embossing is implemented to the part corresponding with the 1st engaging zones 6S and the 2nd weak engaging zones 6W and processes.The involution portion utilizing crimping to be formed can be formed thus.

As shown in Figure 2, the involution junction surface group 61G that the involution junction surface 61 that the engaging zones 6 comprising the 1st engaging zones 6S and the 2nd weak engaging zones 6W has multiple little shape arranges regularly in the Y direction, involution junction surface group 61G is arranged with multiple in X-direction, the adjacent involution junction surface 61,61 forming another involution junction surface group 61G each other with X-direction not mode be side by side in staggered configuration.If describe in detail, then as shown in Figure 2, the involution junction surface 61 of diaper 1 comprises the 1st involution junction surface 611 relative to the angled lengthwise of Y-direction tool and the 2nd involution junction surface 612 made towards the lengthwise relative with the 1st involution junction surface 611.Herein, what is called makes towards relatively, is that to instigate the 1st involution junction surface 611 relative to the angle relative to Y-direction at the imaginary 1st involution junction surface 611 with the 1st imaginary line IL1 that centre line C L extends abreast (with reference to Fig. 2) balanced configuration, with the angle relative to Y-direction at the 2nd involution junction surface 612 be unanimously identical angle.As shown in Figure 2, the involution junction surface group 61G of diaper 1 comprises the 1st involution junction surface group 611G that the 1st involution junction surface 611 arranges regularly in the Y direction at spaced intervals and the 2nd involution junction surface group 612G that the 2nd involution junction surface 612 arranges regularly in the Y direction at spaced intervals.And, the engaging zones 6 of diaper 1, as shown in Figure 2,1st involution junction surface group 611G and the 2nd involution junction surface group 612G alternately respectively arranges two row in X-direction, is arranged with the 1st involution junction surface group 611G and the 2nd involution junction surface group 612G respectively at the 1st engaging zones 6S and the 2nd weak engaging zones 6W.Therefore, the 1st adjacent involution junction surface 611 forming another involution junction surface group 61G (the 1st involution junction surface group 611G or the 2nd involution junction surface 612) is not configured in parallel position with the 2nd involution junction surface 612 in X-direction and is in staggered configuration in the Y direction.

2nd weak engaging zones 6W is in diaper 1, as shown in Figure 2, comprise multiple involution junction surface 61 (the 1st involution junction surface 611 and the 2nd involution junction surface 612) and be configured at adjacent involution junction surface 61 (the 1st involution junction surface 611 and the 2nd involution junction surface 612) non-involution junction surface 62 each other.Specifically, in diaper 1,2nd weak engaging zones 6W only engages via multiple involution junction surface 61 as shown in Figure 2, and therefore adjacent involution junction surface 61 (the 1st weld portion 611 and the 2nd weld portion 612) becomes the disengaged portion 62 that magic tape 4 does not engage with flank sheet 3 each other.So, have disengaged portion 62 at the 2nd weak engaging zones 6W, therefore flexibility is excellent.

Moreover as mentioned above, the 1st engaging zones 6S, in diaper 1, engages via multiple involution junction surface 61 as shown in Figure 2, and engages via the bonding agent junction surface 63 utilizing bonding agent to be formed.Bonding agent junction surface 63 in X-direction to comprise the width of the width of two row involution junction surface group 61G (the 1st involution junction surface group 611G and the 2nd involution junction surface group 612G), parallel with centre line C L, along Y-direction continuously throughout the formation endlong of the Y-direction of magic tape 4.Moreover the bonding agent junction surface 63 of diaper 1 is formed as the width of the width comprising two row involution junction surface group 61G, but also can be formed as the width consistent with the width of two row involution junction surface group 61G.So, at the 1st engaging zones 6S, each other by bonding agent and fixing, therefore there is not at the 1st engaging zones 6S the disengaged portion 62 that magic tape 4 do not engage with flank sheet 3 in adjacent involution junction surface 61 (the 1st involution junction surface 611 and the 2nd involution junction surface 612).At the 1st engaging zones 6S, magic tape 4 and retractility flank sheet 3 are fixed by welding and bonding agent, therefore adhesive strength raising compared with the 2nd weak engaging zones 6W.

In addition, the involution junction surface 61 of the part in multiple weld portion 61, in diaper 1, extends to width (X-direction) outside across the lateral border 3S1 along main body long side direction (Y-direction) of retractility flank sheet 3.Specifically, the multiple 2nd involution junction surfaces 612 being configured at formation the 2nd involution junction surface group 612G in the 1st involution junction surface group 611G of the 2nd weak engaging zones 6W and the 2nd involution junction surface group 612G are crossed the lateral border 3S1 of flank sheet 3 from the 2nd weak engaging zones 6W respectively and extend outside X-direction.In other words, the multiple 2nd involution junction surfaces 612 being configured at formation the 2nd weld portion group 612G of the 2nd weak engaging zones 6W across flank sheet 3 lateral border 3S1 configure.So, the involution junction surface 61 of a part in above-mentioned multiple involution junction surface 61 is stepped up the lateral border 3S1 along main body long side direction that states flank sheet 3 and is extended to width foreign side, suppress the border that the lateral border 3S1 along magic tape 4 from flank sheet 3 extends thus, flank sheet 3 is from magic tape 4 projection.

The length in the Y direction of the retractility flank sheet 3 in the region (engaging zones 6) that retractility flank sheet 3 is overlapping with magic tape 4, is longer than the length in the Y direction of the magic tape 4 of this overlapping region (engaging zones 6).Herein, so-called above-mentioned length in the Y direction, refers to the length on the widest position in the part of retractility flank sheet 3 or the part of magic tape 4 comprising retractility flank sheet 3 region overlapping with magic tape 4 (engaging zones 6).Make with regard to harmless wearing feeling operability improve and skin opposite face side acted on to the viewpoint of the power making it inside, the length in the Y direction of the retractility flank sheet 3 in the region (engaging zones 6) of above-mentioned overlap is preferably more than 1.2 times less than 3.5 times of the length in the Y direction of the magic tape 4 in the region (engaging zones 6) of this overlap, and then is preferably more than 1.4 times less than 3.0 times.

With regard to the viewpoint of adhesive strength, the region (engaging zones 6) of above-mentioned overlap is preferably the scope of less than more than 10% 50% relative to the gross area of the retractility flank sheet 3 during the retractility flank sheet 3 overlooked under naturalness, and then is preferably the scope of less than more than 10% 40%.

The area of the 1st engaging zones 6S its area preferred and the 2nd weak engaging zones 6W is in a ratio of same degree or is greater than the area of the 2nd weak engaging zones 6W.

With regard to harmless wearing feeling and adhesive strength improve viewpoint with regard to, 1st engaging zones 6S is preferably the scope of less than more than 40% 80% relative to the area in the region (engaging zones 6) of above-mentioned overlap, and then is preferably more than 50% and the scope of less than 70%.

With regard to identical viewpoint, the 2nd weak engaging zones 6W is preferably the scope of more than 20% and less than 60% relative to the area in the region (engaging zones 6) of above-mentioned overlap, and then is preferably more than 30% and the scope of less than 50%.

As the shape of the weld portion 61 (the 1st weld portion 611 and the 2nd weld portion 612) at involution junction surface, there is no particular restriction, except the ellipse of the lengthwise as diaper 1, it also can be arbitrary shape such as such as circle, rhombus, triangle, polygon etc.With regard to harmless wearing feeling and adhesive strength improve viewpoint with regard to, the involution pattern area of 1 involution junction surface 61 (the 2nd involution junction surface 612,1 611 or 1, the 1st involution junction surface) is preferably 2mm ²above and 30mm ²below, so be preferably 2mm ²above and 20mm ²below.With regard to identical viewpoint, the 1st weld portion 611 that Y-direction is adjacent or adjacent the 2nd interval each other, involution junction surface 612 of Y-direction are preferably more than 1mm and below 8mm, and then are preferably below 6mm.With regard to identical viewpoint, immediate adjacent interval each other, involution junction surface 61 (interval at the 1st involution junction surface 611 and the 2nd involution junction surface 612) is preferably more than 1mm and below 8mm, and then is preferably below 6mm.In addition, with regard to identical viewpoint, the number that involution junction surface 61 (the 1st involution junction surface 611 and the 2nd involution junction surface 612) configures is preferably 1/cm ²above and 16/cm ²below, so be preferably 2/cm ²above and 10/cm ²below.And then, with regard to identical viewpoint, total involution pattern area of multiple involution junction surface 61 (the 1st involution junction surface 611 and the 2nd involution junction surface 612) is preferably more than 10% relative to the ratio of the area in the region (engaging zones 6) of above-mentioned overlap and less than 70%, and then is preferably more than 10% and less than 50%.

In diaper 1, as shown in Figure 2, the end that magic tape 4 is partial to the drosal part B side of flank sheet 3 is mounted neighbouringly.Therefore, when wearing when stretching magic tape 3, being configured in multiple weld portion 61 leans on width (X-direction) outside most and the angle of inclination leaning on 1 involution junction surface 61 of crotch C side most, roughly consistent with the angle of inclination of the 2nd imaginary line IL2 linking intersection point PD1 and intersection point PD2, wherein, intersection point PD1 is the intersection point of the crotch C side of flank sheet 3 and magic tape 4, and intersection point PD2 is the intersection point of the crotch C side of flank sheet 3 and absorbent main body 2.Namely, in diaper 1, when worn stretching magic tape 3 when, be configured at and be configured at by the angle of inclination of 1 the 2nd weld portion 612C of crotch C side in multiple 2nd involution junction surfaces 612 of formation the 2nd involution junction surface group 612G of the 2nd weak engaging zones 6W of engaging zones 6, roughly consistent with the angle of inclination of the 2nd imaginary line IL2.In diaper 1, be configured at the 1st engaging zones 6S of engaging zones 6 respectively all consistent with the angle of inclination of the 2nd involution junction surface 612C with the angle of inclination at multiple 2nd involution junction surfaces 612 of formation the 2nd involution junction surface group 612G of the 2nd weak engaging zones 6W.Moreover what is called is configured at leans on the 2nd weld portion 612C of crotch C side to refer to the involution junction surface of the weak engaging zones 6W of covering over half 2nd of its area most.

In addition, in diaper 1, as shown in Figure 3, engaging zones 6 is overlapping with a part of the foreign side anchor portion 33O in the outside of the elastomeric element 33 in retractility flank sheet 3.If describe in detail, then in diaper 1, the 1st engaging zones 6S of engaging zones 6 is overlapping with the part that namely a part of the foreign side anchor portion 33O of elastomeric element 33 forms the outside bond layer 36 of the foreign side anchor portion 33O of elastomeric element 33.The overlapping area of the 1st engaging zones 6S and outside bond layer 36 is preferably the scope of more than 5% and less than 50% relative to the area of outside bond layer 36, and then is preferably more than 15% and the scope of less than 30%.

When wearing diaper 1, magic tape 4 being launched, stretching magic tape 4 to pull and under the state that flank sheet 3 is extended, the hook side part 42 of this magic tape 4 taken on sheet 5 by being pressed in and being fixed.

The constituent material of diaper 1 is described.

As the positive dough sheet 21, back sheet 22, the absorber 23 that form absorbent main body 2, can use with no particular limitation respectively always for the material etc. of the absorbent commodity such as disposable diaper, sanitary napkin.Such as, as positive dough sheet 21, hydrophilic can be used and the non-woven fabrics of liquid permeability or three-dimensional apertured film etc.As back sheet 22, film or the non-woven fabrics (such as spunbond-melt blown-spunbond non-woven fabrics, hot-wind nonwoven cloth, spun-bonded non-woven fabrics, spun-laced nonwoven fabric, needle punched non-woven fabrics etc.) of opaque liquid or difficult liquid permeability can be used.Or, also can use as the composite sheet that they are laminated.In addition, as absorber 23, the aggregation of the fibers such as the coated paper pulp fiber of clad sheet formed with water penetration thin paper or non-woven fabrics (also can be non-woven fabrics) can be used or make the material etc. of the absorbent core keeping water-absorbent polymer particles in the aggregation of above-mentioned fiber.As the sidepiece sheet 24 forming stereo enclosure, film, non-woven fabrics, fabric or their lamination sheets etc. can be used.

As forming the skin lateral plate 31 of retractility flank sheet 3 and non-skin lateral plate 32, can use with no particular limitation always for the various sheet materials of the absorbent commodity such as disposable diaper, sanitary napkin.

Such as, as skin lateral plate 31, non-skin lateral plate 32, non-woven fabrics, fabric, film or their lamination sheets etc. can be used.

As forming the thread elastomeric element 33 of retractility flank sheet 3, forming elastomeric element 25, the leg elastic members 26 of stereo enclosure, the elastomeric element of the thread or wire be made up of polyethylene-alphaolefin copolymers etc. such as natural rubber, polyurethane, polystyrene-poly isoprene copolymer, polystyrene-polybutadiene copolymer, ethyl acrylate-ethylene can be used.With regard to the viewpoint such as summary of manufacturing cost or manufacturing process, the material that the multiple elastomeric elements 33 being configured at retractility flank sheet 3 are preferably identical type configures with identical percentage elongation.

As the main body side bond layer 35 to form retractility flank sheet 3, the bonding agent of outside bond layer 36 and middle bond layer 37 is the preferred material for engaging the bonding agent between each parts of representative, can enumerate: amorphous polyolefins, vinyl-vinyl acetate copolymer (EVA), vinyl-acrylate copolymer (EEA), styrene butadiene styrene block copolymer (SBS) (SBS), styrene isoprene styrene block copolymer (SIS) (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), the thermoplastic polymers such as styrene-ethylene/propylene-styrene block copolymer (SEPS) and their mixture etc.The preferred heat molten type of bonding agent.

Moreover, the application pattern forming the bonding agent of each bond layer 35,36,37 preferably uses spray gun, painting rifle etc. to carry out the coating of whole of what is called as adhesive applicating machine, but as adhesive applicating machine, bead spray gun (bead gun), spiral spray gun, Ω shape spray gun, transfer roll etc. also can be used to carry out the pattern coating of linearity, helical form, Ω shape, point-like etc.

When flank sheet 3 is not retractility flank sheet, can uses always for the various sheet materials of the absorbent commodity such as disposable diaper, sanitary napkin with no particular limitation, such as, can use non-woven fabrics, film or their lamination sheets etc.

As long as the hook side part 42 and the band substrate sheets 41 that form magic tape 4 are usual for can be used for the material of the absorbent commodities such as disposable diaper, then can use with no particular limitation.Such as, as hook side part 42, the sunny side parts etc. in " Magic Tape (registered trade mark) " (manufacture of KURARAY company), " Quicklon (registered trade mark) " (manufacture of YKK company), " Magi Cloth (registered trade mark) " (manufacture of Kanebo Bell-Touch company) etc. can be used.As band substrate sheets 41, the synthetic resin such as polyethylene, polypropylene or polyethylene terephthalate can be used and comprise the sheet of composite of two or more above-mentioned synthetic resin or non-woven fabrics etc.

Action effect when using the disposable diaper 1 (hereinafter also referred to " diaper 1 ") of the above-mentioned present embodiment as the present invention's (the 1st invention) is described.

Diaper 1, as shown in Figures 2 and 3, engage magic tape 4 and the engaging zones 6 of flank sheet 3 be by the 1st engaging zones 6S engaged by bonding agent and than the 1st engaging zones 6S by width (X-direction) outside configure adjacently and the 2nd weak engaging zones 6W that bond strength is weaker than the bond strength of the 1st engaging zones 6S formed.Therefore, as shown in Figure 4, when wearing diaper with pull stretch magic tape 4 and excessive hot strength applied to engaging zones 6, than the 2nd weak engaging zones 6W of lateral border 3S1 side of the 1st engaging zones 6S by flank sheet 3, magic tape and flank sheet are easily peeled off not cause the degree of wood destruction.So, the 2nd weak engaging zones 6W of the lateral border 3S1 side of flank sheet 3 is easy to peel off, and therefore in the 1st engaging zones 6S, magic tape 4 and flank sheet 3 not easily produce wood destruction and damaged, can maintain the wearing effect of diaper 1, use sense raising.

In addition, diaper 1, as shown in Figures 2 and 3, owing to being configured with the 2nd weak engaging zones 6W than the 1st engaging zones 6S adjacently by width (X-direction) outside, therefore, when the wearing of diaper 1 or in using, lateral border the 3S1 not easily curling or bending of flank sheet 3, use sense improves.Particularly, in diaper 1, as shown in Figures 2 and 3, flank sheet 3 is retractility flank sheet, and then magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3, therefore plays above-mentioned effect further.In addition, owing to being configured with the 2nd weak engaging zones 6W than the 1st engaging zones 6S by width (X-direction) outside, therefore in the manufacture conveying of diaper 1, lateral border the 3S1 also not easily curling or bending of flank sheet 3, production efficiency is improving.

In addition, diaper 1, as shown in Figures 2 and 3, the 1st engaging zones 6S is formed by bonding agent and involution, and the 2nd weak engaging zones 6W is formed by means of only involution.So, the 2nd of adhesive-applying the weak engaging zones 6W is not being had by being configured with outside width (X-direction) than the 1st engaging zones 6S, when therefore forming the 1st engaging zones 6S at adhesive-applying, expose the lateral border 3S1 of flank sheet 3 and be difficult to be applied to magic tape 4.So, be difficult to produce adhesive applicating to the situation of magic tape 4, therefore not easily produce the joint with joint that is miscellaneous part or to skin or clothes that is that cause because of the spilling of bonding agent, use sense improves further.

In addition, diaper 1, as shown in Figure 2, a part of involution junction surface 61 comprised in multiple involution junction surfaces 61 of the engaging zones 6 of the 1st engaging zones 6S and the 2nd weak engaging zones 6W is crossed the lateral border 3S1 of flank sheet 3 and extends to width (X-direction) outside.In other words, the multiple 2nd involution junction surfaces 612 being configured at formation the 2nd involution junction surface group 612G of the 2nd weak engaging zones 6W across flank sheet 3 lateral border 3S1 configure.Therefore, when the wearing of diaper 1 or in using, lateral border the 3S1 more not easily curling or bending of flank sheet 3, use sense improves further.

In addition, diaper 1, as shown in Figure 2, be mounted near the end that magic tape 4 is partial to the drosal part B side of flank sheet 3, when wearing when stretching magic tape 3, being configured at being configured in multiple 2nd weld portion 612 of formation the 2nd weld portion group 612G of the 2nd weak engaging zones 6W of engaging zones 6 and leaning on the angle of inclination of 1 the 2nd weld portion 612C of crotch C side roughly the most consistent with the angle of inclination of the 2nd imaginary line IL2 most.When wearing when stretching magic tape 3, load is applied to the direction along the 2nd imaginary line IL2.When be positioned at the starting point becoming this load position create stripping by the 2nd weld portion 612C of crotch C side, angle of inclination is roughly consistent with the 2nd imaginary line IL2, therefore peels off required workload maximization.Magic tape 4 and flank sheet 3 not cracky, can maintain the wearing effect of diaper 1, and use sense improves.

In addition, diaper 1, as shown in Figure 3, the 1st engaging zones 6S of engaging zones 6 is overlapping with the part that namely a part of the foreign side anchor portion 33O of elastomeric element 33 forms the outside bond layer 36 of the foreign side anchor portion 33O of elastomeric element 33.That is, magic tape and elastomeric element 33 directly link.Therefore, the stretching magic tape 4 when wearing and apply impact, also not easily produce destruction because elastomeric element 33 carries out cushioning at engaging zones 6, damage use sense probability reduce.

The disposable diaper of the present invention's (the 1st invention), not by any restriction of diaper 1 of above-mentioned present embodiment, can suitably change.

Such as, in the diaper 1 of above-mentioned embodiment, as shown in Figure 2, flank sheet 3 has retractility, but also can be non-telescoping.In addition, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of flank sheet 3, but also only can be installed on the skin opposite face (face of P side) of flank sheet 3.

In addition, in the diaper 1 of above-mentioned embodiment, as shown in Figure 2, the weld portion 61 of the part in multiple weld portion 61 of engaging zones 6 is crossed the lateral border 3S1 of flank sheet 3 and extends to width (X-direction) foreign side, but also can not extend.

In addition, in the diaper 1 of above-mentioned embodiment, as shown in Figure 2, the angle of inclination being configured at multiple 2nd weld portion 612 of formation the 2nd weld portion group 612G of engaging zones 6 is roughly consistent with the angle of inclination of the 2nd imaginary line IL2, but also can be inconsistent.

In addition, in the diaper 1 of above-mentioned embodiment, as shown in Figure 2, engaging zones 6 is overlapping with a part of the foreign side anchor portion 33O in the outside of the elastomeric element 33 in flank sheet 3, but also can be configured at than foreign side anchor portion 33O by width (X-direction) outside.

In addition, in the diaper 1 of above-mentioned embodiment, as shown in Figure 2, the angle of inclination being configured at multiple 2nd weld portion 612 of formation the 2nd weld portion group 612G of engaging zones 6 is all identical, but also can not be identical.Such as, in the diaper 1A of another embodiment shown in Fig. 5, except the form of diaper 1, when wearing when stretching magic tape 3, being configured at by width (X-direction) outside and 1 involution junction surface 61 of most backrest sidepiece B side only in multiple weld portion 61, namely the angle of inclination being configured at 1 the 2nd involution junction surface 612B of most backrest sidepiece B side in multiple 2nd involution junction surfaces 612 of formation the 2nd involution junction surface group 612G of the 2nd weak engaging zones 6W of engaging zones 6 is configured at, roughly consistent with the angle of inclination of the 3rd imaginary line IL3 linking intersection point PU1 and intersection point PU2, wherein, intersection point PU1 is the intersection point of the drosal part B side of flank sheet 3 and magic tape 4, intersection point PU2 is the intersection point of the drosal part B side of flank sheet 3 and absorbent main body 2.Moreover the 2nd involution junction surface 612B that what is called is configured at most backrest sidepiece B side refers to the involution junction surface being covered in the 2nd weak engaging zones 6W over half of its area.

In diaper 1A, when wearing when stretching magic tape 3, load is applied to the direction along the 2nd imaginary line IL2, and also load is applied to the direction along the 3rd imaginary line IL3.But, be positioned at the position of the starting point becoming this load by the 2nd weld portion 612C of crotch C side and the 2nd weld portion 612B angle of inclination separately of most backrest sidepiece B side and the angle of inclination of the 2nd imaginary line IL2 and the angle of inclination of the 3rd imaginary line IL3 roughly consistent.Therefore, magic tape 4 and flank sheet 3 more not cracky, can maintain the wearing effect of diaper 1, use sense improves further.

Below, for the disposable diaper of the present invention's (the 2nd invention), based on its preferred 1st embodiment, be described with reference to Fig. 6 ~ Fig. 9.

As shown in Figure 6, the disposable diaper 1B (hereinafter also referred to " diaper 1B ") of present embodiment, at the lateral part 3S along main body long side direction (Y-direction) of the retractility flank sheet 3 extended respectively from the both sides 2S of drosal part B of rectangular absorbent main body 2 of the absorber 23 comprising liquid retainability, is provided with magic tape 4.

As shown in Figure 6, diaper 1B is formed as symmetrical relative to centre line C L.Therefore, in the following description, about symmetrical part, be described mainly for right side.

In addition, in this manual, so-called " skin opposite face " refers to the face being configured at the skin side of wearer when wearing in the both sides of each parts forming diaper 1B, and the face identical with the face of " P " side in Fig. 8.In addition, so-called " non-skin opposite face " refer in the both sides of each parts forming diaper 1B when wearing towards the face of the opposition side of the skin side of wearer, and the face identical with the face of " Q " side in Fig. 8.

In addition, " Y " direction shown in each figure is the long side direction (main body long side direction) of the absorbent main body 2 of diaper 1B, the direction parallel with centre line C L, " X " direction shown in each figure is the width (body width direction) of the absorbent main body 2 of diaper 1B, is the direction vertical with centre line C L.Below, particularly diaper 1B is described.

As shown in Figure 6, absorbent main body 2 has oblong-shaped longer in the Y direction, and comprise the veutro being positioned at wearer when wearing veutro portion A, be positioned at the drosal part B of the dorsal part of wearer and be positioned at the crotch C of crotch part.The mode of extending outside X-direction with both side edges 2S1, the 2S1 respectively from absorbent main body 2 along both sides 2S, 2S of Y-direction of the absorbent main body 2 of retractility flank sheet 3,3 in drosal part B is installed.

As shown in Figure 6, absorbent main body 2 is parts of lengthwise longer in the Y direction, it comprise liquid retainability absorber 23, be configured at the positive dough sheet 21 of the skin opposite face side of absorber 23 and be configured at the outer composite sheet of non-skin opposite face side of absorber 23, and be divided into veutro portion A, in the drosal part of dorsal part and the crotch that is configured between this veutro portion and this drosal part.That is, absorbent main body 2 comprises the outer composite sheet 22 of the positive dough sheet 21 of liquid permeability, opaque liquid or difficult liquid permeability (comprising water-repellancy) as shown in Figure 6 and is arranged at the absorber 23 of the liquid retainability between above-mentioned two panels 21,22.As shown in Figure 6, positive dough sheet 21 and outer composite sheet 22 cover whole of the skin opposite face of absorber 23 and whole of non-skin opposite face respectively, extend from the periphery of absorber 23, the part of extending, fixed by weldings such as bonding agent or heat sealing such as hot melts.Positive dough sheet 21 is identical with the length of outer composite sheet 22 in the Y direction, but is formed shorter than outer composite sheet 22 in the X direction.Outer composite sheet 22 is formed as identical with absorbent main body 2 plan view shape.

In addition, at the sidepiece 2S along Y-direction of absorbent main body 2, sidepiece sheet 24 is configured with across positive dough sheet 21.Sidepiece sheet 24 arranges the whole region of sidepiece 2S along Y-direction be fixed as throughout the skin opposite face side of positive dough sheet 21.Interior side (near the centre line C L) end of the X-direction of sidepiece sheet 24 becomes free end, arrange with the state of extending in the Y direction near the free end of crotch C and be fixed with three-dimensional fold formation elastomeric element 25, when wearing, by the contractility of this elastomeric element 25, from free end, the part of Rack is left from positive dough sheet 21 and forms three-dimensional fold.

In addition, at the sidepiece 2S along Y-direction of absorbent main body 2, be bonded to sidepiece sheet 24 and outer composite sheet 22 that the foreign side to X-direction extends and be formed with wing flap portion.In diaper 1B, as shown in Figure 6, leg creases formation elastomeric element 26 arranges the wing flap portion being fixed on crotch C with the state of extending in the Y direction, when wearing, form leg creases by the contractility of this elastomeric element 26.

As shown in Figure 6, at both sides 2S, 2S of the drosal part B of absorbent main body 2, be separately installed with the retractility flank sheet 3,3 extended to width (X-direction) foreign side, in width (X-direction) outside of retractility flank sheet 3,3, magic tape 4 be installed.If be described with reference to the configuration relation of diaper 1B to retractility flank sheet 3 and magic tape 4, then as shown in Figure 7, above the Y-direction of drawing intersection point PU1 and retractility flank sheet 3 and magic tape 4 above the Y-direction linking absorbent main body 2 and retractility flank sheet 3 during the imaginary line IL2 of intersection point PU2, cross the mode of the region T1 of this imaginary line IL2 to have top in the Y direction, at retractility flank sheet 3, magic tape 4 is installed.Or, as shown in Figure 7, below the Y-direction of drawing intersection point PD1 and retractility flank sheet 3 and magic tape 4 below the Y-direction linking absorbent main body 2 and retractility flank sheet 3 during the imaginary line IL3 of intersection point PD2, cross the mode of the region T2 of this imaginary line IL3 to have below in the Y direction, at retractility flank sheet 3, magic tape 4 is installed.

Moreover, in diaper 1B, as shown in Figure 7, with have the region T1 that crosses of top in the Y direction and in the Y direction below the mode in two regions of region T2 of crossing, fixing retractility flank sheet 3 and magic tape 4, as long as but to have the region T1 that crosses of top in the Y direction and any one mode in the region T2 that crosses of below in the Y direction, fix retractility flank sheet 3 and magic tape 4.

In diaper 1B, as shown in Figure 8, being configured at the non-skin opposite face of outer composite sheet 22 of sidepiece 2S, by various known method, to be fixed with retractility flank sheet 3 from both side edges 2S1, the 2S1 of absorbent main body 2 to the mode that X-direction foreign side extends.Moreover in diaper 1B, retractility flank sheet 3 is fixed on the non-skin opposite face of outer composite sheet 22, but also can configure be fixed on sidepiece 2S configure sidepiece sheet 24 and outer composite sheet 22 between.

Retractility flank sheet 3 is at the skin lateral plate 31 in skin opposite face side and fix multiple elastomeric elements 33 of the state that X-direction is extended and formed between the non-skin lateral plate 32 of non-skin opposite face side in diaper 1B.In addition, the length of the lateral part 3s along main body long side direction (Y-direction) of retractility flank sheet 3, is formed as the length of the main body long side direction (Y-direction) at the 1st engaging zones 6 being longer than following magic tape 4.If describe in detail, then as shown in Figure 7, retractility flank sheet 3 in diaper 1B is rectangle expanding under plane state, if or the length of the lateral border along main body long side direction (Y-direction) of retractility flank sheet 3, be formed as the length of the main body long side direction (Y-direction) at the 1st engaging zones 6 being longer than magic tape 4, then also can for trapezoidal or comprise the shape of curve, form the skin lateral plate 31 of retractility flank sheet 3 and non-skin lateral plate 32 be also formed as expand under plane state identical with retractility flank sheet 3 plan view shape.Multiple elastomeric element 33 configures along the X-direction of diaper 1B respectively, extends in X-direction.In addition, the multiple elastomeric elements 33 in retractility flank sheet 3 arrange roughly equal compartment of terrain configuration in the Y direction in diaper 1B.

As mentioned above, the retractility flank sheet 3 of diaper 1B between two non-woven fabrics (skin lateral plate 31 and non-skin lateral plate 32), arranges fixing multiple thread elastomeric element 33 and formed, but retractility flank sheet 3 can be used in the complex arranging fixing elastomer film or the net that is made up of elastomer between two non-woven fabrics (skin lateral plate 31 and non-skin lateral plate 32) and replace thread elastomeric element 33.Moreover, when using thread elastomeric element 33, except comprising parts that section is circular, square shape, also comprise the parts of the narrow band shapes such as rectangle.

In addition, in the retractility flank sheet 3 of diaper 1B, as shown in Figure 7 and Figure 8, the skin lateral plate 31 and the non-skin lateral plate 32 that form retractility flank sheet 3 are formed as identical shape and identical size, but the size that skin lateral plate 31 and non-skin lateral plate 32 also can be different for the development length extended from the lateral margin 2S1 of absorbent main body 2.So, when the skin lateral plate 31 using the development length that extends from lateral margin 2S1 different and non-skin lateral plate 32 form retractility flank sheet 3, formed by a skin lateral plate 31 or non-skin lateral plate 32 outside the X-direction of the lateral part 3S of retractility flank sheet 3.Therefore, the pliability of the lateral part 3S of retractility flank sheet 3 improves.

Be configured at the thread elastomeric element 33 of retractility flank sheet 3, with regard to the flexibility raising of retractility flank sheet 3 and the viewpoint guaranteed of retractility, its width (size of Y-direction) or diameter are preferably more than 0.1mm and below 2mm, are more preferably more than 0.1mm and below 1mm.In addition, the number being configured at the thread elastomeric element 33 of retractility flank sheet 3 is preferably more than 1 and less than 25 degree, is more preferably more than 3 and less than 20.In addition, percentage elongation can from existing known suitably select, stress when being stretched to percentage elongation 100% is more than 0.1N and 1 thread elastomeric element 33 of below 1N preferably arranges fixing with the state of extending in the scope of percentage elongation more than 50% and less than 300%, and then preferably arrange fixing with the state of extending more than 100% and in the scope of less than 250%.Moreover the length of the amount that percentage elongation is elongation and increases is relative to naturally long ratio, and such as, if the parts of length 10cm to be stretched to 20cm, then its percentage elongation is 100%.

Moreover, when arranging fixing elastomer film or the net that is made up of elastomer replaces thread elastomeric element 33 and forms retractility flank sheet 3, preferably the stress of every 25mm width when being stretched to percentage elongation 100% is more than 3N/25mm and the net of 25N/25mm arranges with the state of extending in the scope of percentage elongation more than 50% and less than 300% and fixingly forms retractility flank sheet 3, so preferably with more than 100% and the state that the scope of less than 250% is extended arrange fixing and form retractility flank sheet 3.

The multiple thread elastomeric element 33 of elongation state intersects via each elastomeric element 33 and is fixed between skin lateral plate 31 and non-skin lateral plate 32 along multiple bonding agents (not shown) that Y-direction extends, and do not arranging the position of elastomeric element 33, skin lateral plate 31 and non-skin lateral plate 32 directly engage via each above-mentioned bonding agent (not shown) each other.Multiple bonding agent (not shown) preferably all extends along Y-direction with all thread elastomeric element 33 extended in X direction across, and then preferably throughout the total length of the Y-direction of retractility flank sheet 3.Bonding agent (not shown) arranges roughly equal compartment of terrain in the X direction and is configured with multiple.Retractility flank sheet 3 applies multiple bonding agent (not shown) by any one or both of various known method in skin lateral plate 31 and non-skin lateral plate 32, make sheet above 31,32 overlapping after coating and pressurize, fix the thread elastomeric element 33 of multiple elongation state thus and to be formed.As shown in Figure 7 and Figure 8, elastomeric element 33 in the retractility flank sheet 3 of formation like this has interior side (near centre line C L) the anchor portion 33I and foreign side anchor portion 33O of X-direction, at interior side (near centre line C L) anchor portion 33I and foreign side anchor portion 33O, not there is contractility, and become non-telescoping state.The length of the X-direction of foreign side anchor portion 33O is under the naturalness of the retractility flank sheet 3 shown in Fig. 7, be preferably thread elastomeric element 33 more than 10% of X-direction total length and the scope of less than 40%, and then be preferably more than 15% and the scope of less than 35%.The length of the X-direction of interior side anchor portion 33I is also identical with the length of the X-direction of foreign side anchor portion 33O.Moreover, retractility flank sheet 3 except utilize bonding agent (not shown) to realize fixing except, also can combine the welding utilizing heat sealing etc. to carry out and fixedly implement.

In diaper 1B, the skin lateral plate 31 of retractility flank sheet 3 has the extension 31S extended to X-direction foreign side than the foreign side anchor portion 33O of the X-direction of multiple thread elastomeric element 33 as shown in Figure 7 and Figure 8, and non-skin lateral plate 32 has the extension 32S extended to X-direction foreign side than the foreign side anchor portion 33O of the X-direction of multiple elastomeric element 33 too.Extension 31S, 32S are each other by utilizing various known method integrally carry out pressurizeing after adhesive-applying and fix.With regard to the viewpoint that the lateral part 3S of retractility flank sheet 3 is in use not easily curling, extension 31S, 32S each other fixing except utilize bonding agent to realize fix except, the welding also can implementing to utilize involution to carry out is fixed, and also can combine them.

If be described in detail the magic tape 4 of the lateral part 3S being arranged at retractility flank sheet 3, then magic tape 4 comprises band substrate sheets 41 and outside the X-direction of band substrate sheets 41, has the hook side part 42 of multiple engaging protrusion.Magic tape 4 folds before use, launches as shown in Figure 8 in use to use.The magic tape 4 of diaper 1B is at the longer rectangle of X-direction as shown in Figure 7 in the deployed state.Magic tape 4 is being formed as fixing hook side part 42 outside the X-direction of the band substrate sheets 41 identical with the plan view shape of magic tape 4 and being formed.Moreover, at the outer surface of the veutro portion A of diaper 1B, be provided with make hook side part 42 set of magic tape 4 take sheet 5.

If to being fixedly described in detail of magic tape 4 and retractility flank sheet 3, then magic tape 4 is installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3 as shown in Figure 8.Specifically, in diaper 1B, as shown in Figure 8, the interior side of the X-direction of magic tape 4 (near centre line C L) side is only installed on the extension 32S of foreign side anchor portion 33O by X-direction foreign side of the thread elastomeric element 33 of ratio in the non-skin lateral plate 32 forming retractility flank sheet 3, and is only installed on the non-skin opposite face (face of Q side) of extension 32S.

In addition, as shown in Figure 7 and Figure 8, magic tape 4, from the lateral border 3S1 along Y-direction of retractility flank sheet 3 to absorbent main body 2 side S spaced apart, engages with retractility flank sheet 3 via the 1st engaging zones 6.Therefore, as shown in Figure 7 and Figure 8, between the 1st engaging zones 6 and the lateral border 3S1 of retractility flank sheet 3, the non-set out region 7 that magic tape 4 does not engage with retractility flank sheet 3 is formed in the Y direction continuously.If specifically describe the 1st engaging zones 6, then the 1st engaging zones 6 is formed by heat sealing or ultrasonic sealing function as shown in Figure 8 and passes through bonding agent and formed in diaper 1B.So, when being formed by heat sealing or ultrasonic sealing function, easily carry out the adjustment of the 1st engaging zones 6, magic tape 4 easily improves with the adhesive strength of retractility flank sheet 3.In addition, when being formed by bonding agent, the flexibility of the 1st engaging zones 6 is excellent.In diaper 1B, because magic tape 4 and retractility flank sheet 3 are fixed by welding and bonding agent, so magic tape 4 improves further with the adhesive strength of retractility flank sheet 3.

More specifically, the 1st engaging zones 6 comprises as shown in Figure 7 and Figure 8: use heat sealing or the ultrasonic sealing function welding weld portion 61 of magic tape 4 and retractility flank sheet 3; With the non-weld portion 62 not having welding magic tape 4 and retractility flank sheet 3.The weld portion group 61G that the weld portion 61 that 1st engaging zones 6 comprises multiple little shape as shown in Figure 7 arranges regularly in the Y direction, weld portion group 61G is arranged with multiple in body width direction (X-direction), the adjacent weld portion 61,61 forming another weld portion group 61G each other with body width direction (X-direction) not mode be side by side in staggered configuration.If describe in detail, then the weld portion 61 of diaper 1B comprises the 1st weld portion 611 relative to the angled lengthwise of Y-direction tool and the 2nd weld portion 612 made towards the lengthwise relative with the 1st weld portion 611 as shown in Figure 7.Herein, what is called makes towards relatively, is that to instigate the 1st weld portion 611 relative to the angle relative to Y-direction of imaginary 1st weld portion 611 configured symmetrically with the imaginary line IL1 that centre line C L extends abreast (with reference to Fig. 7) with the angle relative to Y-direction of the 2nd weld portion 612 be unanimously identical angle.As shown in Figure 7, the weld portion group 61G of diaper 1B comprises: the 1st weld portion group 611G of the 1st weld portion 611 arrangement spaced apart in the Y direction regularly; With the 2nd weld portion group 612G of the 2nd weld portion 612 arrangement spaced apart in the Y direction regularly.And as shown in Figure 7, in the 1st engaging zones 6 of diaper 1B, the 1st weld portion group 611G and the 2nd weld portion group 612G alternately respectively arranges two row in X-direction.Therefore, the 1st adjacent weld portion 611 forming another weld portion group 61G (the 1st weld portion group 611G or the 2nd weld portion 612) is not configured in parallel position with the 2nd weld portion 612 in X-direction, and is in staggered configuration in the Y direction.Moreover as shown in Figure 7, adjacent weld portion 61 (the 1st weld portion 611 and the 2nd weld portion 612) becomes non-weld portion 62 each other.So, the flexibility by having non-weld portion the 62,1st engaging zones 6 is excellent.And by having non-weld portion 62, be difficult to easily produce folding line in weld portion 61, the flexibility of the 1st engaging zones 6 is excellent.

And the 1st engaging zones 6 comprises the bonding agent junction surface 63 using bonding agent to engage magic tape 4 and retractility flank sheet 3 as shown in Figure 8 in diaper 1B.Bonding agent junction surface 63 is consistent with the width of four row weld portion group 61G (two arrange the 1st weld portion group 611G and two arranges the 2nd weld portion group 612G) in X-direction, is formed continuously abreast with centre line C L along Y-direction throughout the total length of the Y-direction of magic tape 4.Therefore, the non-set out region 7 having fixing width (and interval S-phase length together) is formed along Y-direction abreast continuously with centre line C L.Moreover the bonding agent junction surface 63 of diaper 1B is consistent with the width of four lines weld portion group 61G in X-direction, but if non-set out region 7 can be guaranteed, then also can be consistent with the width of four lines weld portion group 61G.

The length of the Y-direction of the retractility flank sheet 3 in the region (making the region that the 1st engaging zones 6 is combined with non-set out region 7) that retractility flank sheet 3 is overlapping with magic tape 4, is longer than the length of the Y-direction of the magic tape 4 of this overlapping region.Herein, the length of so-called above-mentioned Y-direction, refers to the length on the widest position in the part of retractility flank sheet 3 or the part of magic tape 4 comprising retractility flank sheet 3 region overlapping with magic tape 4.Operability is made to improve with regard to harmless wearing feeling and for the viewpoint that the power inwardly in skin opposite face side is played a role, the length of the Y-direction of the retractility flank sheet 3 of above-mentioned overlapping region is preferably more than 1.2 times of the length of the Y-direction of the magic tape 4 of this overlapping region and less than 3.5 times, and then is preferably more than 1.4 times and less than 3.0 times.

With regard to the viewpoint of adhesive strength, the region of above-mentioned overlap is preferably the scope of more than 10% and less than 50% relative to the gross area of the retractility flank sheet 3 during the retractility flank sheet 3 overlooked under naturalness, and then is preferably more than 10% and the scope of less than 40%.

With regard to the viewpoint guaranteeing with adhesive strength of non-set out region 7, the 1st engaging zones 6 is preferably the scope of more than 40% and less than 90% relative to the area of above-mentioned overlapping region, and then is preferably more than 50% and the scope of less than 85%.

With regard to the viewpoint of the degree of freedom maintenance of the side edge part of the retractility flank sheet 3 during with regard to wearing, non-set out region 7 is preferably the scope of more than 10% and less than 50% relative to the area of above-mentioned overlapping region, and then is preferably more than 15% and the scope of less than 40%.

There is no particular restriction for the shape of weld portion 61 (the 1st weld portion 611 and the 2nd weld portion 612), except the ellipse of the lengthwise as diaper 1B, also can be arbitrary shape such as such as circle, rhombus, triangle, polygon etc.With regard to harmless wearing feeling and adhesive strength improve viewpoint with regard to, the involution pattern area of 1 weld portion 61 (1 the 1st weld portion, 611 or 1 the 2nd weld portion 612) is preferably 2mm ²above and 30mm ²below, so be preferably 2mm ²above and 20mm ²below.With regard to identical viewpoint, the 1st weld portion 611 that Y-direction is adjacent or adjacent the 2nd weld portion 612 interval each other of Y-direction are preferably more than 1mm and below 8mm, and then are preferably below 6mm.With regard to identical viewpoint, immediate adjacent weld portion 61 interval each other (interval of the 1st weld portion 611 and the 2nd weld portion 612) is preferably more than 1mm and below 8mm, and then is preferably below 6mm.In addition, with regard to identical viewpoint, the number that weld portion 61 (the 1st weld portion 611 and the 2nd weld portion 612) configures is preferably 1/cm ²above and 16/cm ²below, so be preferably 2/cm ²above and 10/cm ²below.And then, with regard to identical viewpoint, total involution pattern area of multiple weld portion 61 (the 1st weld portion 611 and the 2nd weld portion 612) is preferably more than 10% relative to the ratio of the area of the 1st engaging zones 6 and less than 70%, and then is preferably more than 10% and less than 50%.

The constituent material of diaper 1B is described.

As the positive dough sheet 21, outer composite sheet 22, the absorber 23 that form absorbent main body 2, the material etc. that the always absorbent commodity such as disposable diaper, sanitary napkin uses can be used respectively with no particular limitation.Such as, as positive dough sheet 21, hydrophilic can be used and the non-woven fabrics of liquid permeability or three-dimensional apertured film etc.As outer composite sheet 22, the sheet etc. of the non-woven fabrics (such as, hot-wind nonwoven cloth, spun-bonded non-woven fabrics, spun-laced nonwoven fabric, needle punched non-woven fabrics etc.) that the stacked favourable various method for making of resin molding that can be used in opaque liquid or difficult liquid permeability (comprising water-repellancy) is formed.In addition, as absorber 23, the aggregation of the fibers such as the coated paper pulp fiber of clad sheet formed with water penetration thin paper or non-woven fabrics (also can be non-woven fabrics) can be used or make water-absorbent polymer particles be held in the material etc. of the absorbent core in the aggregation of the fibers such as pulp fibres.As the sidepiece sheet 24 forming stereo enclosure, film, non-woven fabrics, fabric or their lamination sheets etc. can be used.

As the band base material 42 of the skin lateral plate 31 and non-skin lateral plate 32 and magic tape 4 that form retractility flank sheet 3, can use with no particular limitation always for the various sheet materials of the absorbent commodity such as disposable diaper, sanitary napkin.

Such as, as skin lateral plate 31, non-skin lateral plate 32, band base material 42, non-woven fabrics, fabric, film or their lamination sheets etc. can be used.

As the preferred material being used for the bonding agent engaged between each parts being representative with the bonding agent forming the bonding agent junction surface 63 fixed with retractility flank sheet 3 by magic tape 4, can enumerate: amorphous polyolefins, vinyl-vinyl acetate copolymer (EVA), vinyl-acrylate copolymer (EEA), styrene butadiene styrene block copolymer (SBS) (SBS), styrene isoprene styrene block copolymer (SIS) (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), the thermoplastic polymers such as styrene-ethylene/propylene-styrene block copolymer (SEPS) and their mixture etc.The preferred heat molten type of bonding agent.

As long as the hook side part 42 and the band substrate sheets 41 that form magic tape 4 are usual for can be used for the material of the absorbent commodities such as disposable diaper, then can use with no particular limitation.Such as, as hook side part 42, the sunny side parts etc. in " Magic Tape (registered trade mark) " (manufacture of KURARAY company), " Quicklon (registered trade mark) " (manufacture of YKK company), " Magi Cloth (registered trade mark) " (manufacture of Kanebo Bell-Touch company) etc. can be used.As band substrate sheets 41, the synthetic resin such as polyethylene, polypropylene or polyethylene terephthalate can be used and the sheet that is made up of above-mentioned synthetic resin composite of more than two kinds or non-woven fabrics etc.

Action effect when using the disposable diaper 1B (hereinafter also referred to " diaper 1B ") of above-mentioned the 1st embodiment as the present invention's (the 2nd invention) is described.

Diaper 1B, as shown in Figure 7 and Figure 8, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3, close between region 6 and the lateral border 3S1 of retractility flank sheet 3 the engage magic tape 4 and retractility flank sheet 3 the 1st, be formed with non-set out region 7 continuously along Y-direction.Owing to being formed with this kind of non-set out region 7, be used in when wearing diaper 1B, stretch magic tape 4 to pull, when retractility waist panel 3 is extended, the edge, periphery of retractility waist panel 3 is easy towards skin opposite face (face of P side) side as shown in Figure 9.Like this towards under the state of skin opposite face (face of P side) side, by the hook side part 42 of the magic tape 4 of drosal part B side by be pressed in A side, veutro portion take set on sheet 5 time, on diaper 1B in habited situation, be not easy the edge, periphery tangling retractility waist panel 3, use sense improves.

Then, the disposable diaper of the 2nd ~ 6th embodiment of the present invention's (the 2nd invention) is described.The magic tape 4 of the disposable diaper 1C ~ 1G of the 2nd ~ 6th embodiment is different from the diaper 1B of the 1st embodiment with the aspect of the fixing of retractility flank sheet 3.About the diaper 1C ~ 1F of the 2nd ~ 6th embodiment, be described mainly for the aspect different from the diaper 1B of the 1st embodiment, the attached identical symbol of identical aspect mark is omitted the description.In not mentioning especially, suitably application is about the explanation of the diaper 1B of the 1st embodiment.

To the magic tape 4 of diaper 1C and being fixedly described in detail of retractility flank sheet 3.

In diaper 1C, in the same manner as diaper 1B, as shown in Figure 10, the foreign side anchor portion 33O of the elastomeric element 33 that the ratio that the interior side of the X-direction of magic tape 4 (near centre line C L) side is only installed in the non-skin lateral plate 32 forming retractility flank sheet 3 via the 1st engaging zones 6 is thread by the extension 32S of X-direction foreign side, and is only arranged on the non-skin opposite face (face of Q side) of extension 32S via the 1st engaging zones 6.So, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3.

In addition, in diaper 1C, in the same manner as diaper 1B, magic tape 4 and retractility flank sheet 3 are fixed by welding and bonding agent.

As shown in Figure 10, the 1st engaging zones 6 of diaper 1C comprises weld portion 61 and non-weld portion 62 in the same manner as diaper 1B.

As shown in Figure 10, the weld portion 61 of diaper 1C only comprises the 1st weld portion 611 relative to the angled lengthwise of Y-direction tool.In diaper 1C, at the 1st engaging zones 6, the 1st weld portion 611 is configured discontinuously along Y-direction and formed along Y-direction extend the 1st weld portion group 611G be formed with two row in X-direction.The 1st adjacent weld portion 611 and the 1st weld portion 611 that form another adjacent the 1st weld portion group 611G of X-direction are not in staggered configuration, and are configured in the parallel position of X-direction.Moreover as shown in Figure 10, adjacent weld portion 61 becomes non-weld portion 62 each other.

And the 1st engaging zones 6 comprises the bonding agent junction surface 63 using bonding agent to engage magic tape 4 and retractility flank sheet 3 in diaper 1C in the same manner as diaper 1B.Bonding agent junction surface 63 is roughly consistent with the width of two row weld portion group 611G in X-direction, is formed continuously abreast with centre line C L along Y-direction throughout the total length of the Y-direction of magic tape 4.Therefore, the non-set out region 7 having fixing width (and interval S-phase length together) is formed along Y-direction abreast continuously with centre line C L.

If be described action effect when using above-mentioned diaper 1C, then the effect of diaper 1C is identical with the effect of diaper 1B.

Then, to the magic tape 4 of diaper 1D and being fixedly described in detail of retractility flank sheet 3.

In diaper 1D, the 1st engaging zones 6 is overlapping with a part of the foreign side anchor portion 33O of the thread elastomeric element 33 in retractility flank sheet 3 as shown in figure 11.In diaper 1D, the interior side of the X-direction of magic tape 4 (near centre line C L) side via the ratio elastomeric element 33 of the 1st engaging zones 6 in the part and non-skin lateral plate 32 of the position of the non-skin lateral plate 32 of formation retractility flank sheet 3 corresponding to the position of the foreign side anchor portion 33O with elastomeric element 33 foreign side anchor portion 33O by X-direction foreign side extension 32S and install.And interior side (near the centre line C L) side of the X-direction of magic tape 4 is only installed on a part and the extension 32S non-skin opposite face (face of Q side) separately of the position of the non-skin lateral plate 32 corresponding with the position of foreign side anchor portion 33O via the 1st engaging zones 6.So, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3.

In addition, in diaper 1D, in the same manner as diaper 1B, magic tape 4 and retractility flank sheet 3 are fixed by welding and bonding agent.

As shown in figure 11, the 1st engaging zones 6 of diaper 1D comprises weld portion 61 and non-weld portion 62 in the same manner as diaper 1B.

As shown in figure 11, the weld portion 61 of diaper 1D only comprises the 1st weld portion 611 relative to the angled lengthwise of Y-direction tool.In diaper 1D, at the 1st engaging zones 6, the 1st weld portion 611 is configured discontinuously along Y-direction and formed along Y-direction extend the 1st weld portion group 611G form two row in X-direction.The 1st adjacent weld portion 611 and the 1st weld portion 611 that form another adjacent the 1st weld portion group 611G of X-direction are not in staggered configuration, and the position that configuration is parallel in the X direction.Moreover as shown in figure 11, adjacent weld portion 61 becomes non-weld portion 62 each other.

And the 1st engaging zones 6, in diaper 1D, comprises the bonding agent junction surface 63 using bonding agent to engage magic tape 4 and retractility flank sheet 3 in the same manner as diaper 1B.Bonding agent junction surface 63 is roughly consistent with the width of two row weld portion group 611G in X-direction, is formed continuously abreast with centre line C L along Y-direction throughout the total length of the Y-direction of magic tape 4.Therefore, the non-set out region 7 having fixing width (and interval S-phase length together) is formed along Y-direction abreast continuously with centre line C L.

Action effect when using above-mentioned diaper 1D is described.

About the effect of diaper 1D, the aspect different from the effect of diaper 1B is described.Not specified aspect is identical with the effect of diaper 1B, suitably the explanation of the effect of application diaper 1B.

In diaper 1D, the 1st engaging zones 6 is overlapping with a part of the foreign side anchor portion 33O of the thread elastomeric element 33 in retractility flank sheet 3 as shown in figure 11.Therefore, it is possible to improve the bond strength of the foreign side anchor portion 33O of elastomeric element 33.

Then, to the magic tape 4 of diaper 1E and being fixedly described in detail of retractility flank sheet 3.

In diaper 1E, in the same manner as diaper 1B, as shown in figure 12, the foreign side anchor portion 33O of the elastomeric element 33 that the ratio that the interior side of the X-direction of magic tape 4 (near centre line C L) side is only installed in the non-skin lateral plate 32 forming retractility flank sheet 3 via the 1st engaging zones 6 is thread by the extension 32S of X-direction foreign side, and is only installed on the non-skin opposite face (face of Q side) of extension 32S via the 1st engaging zones 6.So, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3.

In addition, in diaper 1E, magic tape 4 and retractility flank sheet 3 are fixed by means of only welding.

As shown in figure 12, the 1st engaging zones 6 of diaper 1E comprises weld portion 61 and non-weld portion 62 in the same manner as diaper 1B.

As shown in figure 12, the weld portion 61 of diaper 1E only comprises the 3rd weld portion 613 of the lengthwise extended abreast with X-direction.In diaper 1E, at the 1st engaging zones 6, by the 3rd weld portion 613 along Y-direction configure discontinuously and be formed as towards X-direction foreign side protrude the 3rd weld portion group 613G be formed with two row in the X direction.Moreover as shown in figure 12, adjacent weld portion 61 becomes non-weld portion 62 each other.As shown in figure 12, the 1st engaging zones 6 of diaper 1E by two row weld portion group 613G, and becomes the convex protruded towards X-direction foreign side becoming summit in the position of the centre line C L 3 along long side direction extension of magic tape 4.Therefore, the non-set out region 7 of diaper 1E becomes the spill towards X-direction foreign side depression.Specifically, the non-set out region 7 of diaper 1E is formed as going and the interval of X-direction expands gradually from the bottom of the centre line C L 3 being positioned at magic tape 4 towards the above-below direction of centre line C L 3.The non-set out region 7 of the diaper 1E of formation like this is formed continuously along Y-direction, and both ends 7E, 7E of being interposed between the Y-direction in non-set out region 7 between non-set out region 7 expand.

With regard to the viewpoint guaranteeing with adhesive strength of non-set out region 7, the 1st engaging zones 6 of diaper 1E is preferably the scope of more than 40% and less than 90% relative to the area of above-mentioned overlapping region, and then is preferably more than 50% and the scope of less than 85%.

With regard to the viewpoint of the degree of freedom maintenance of the side edge part of the retractility flank sheet 3 during with regard to wearing, the non-set out region 7 of diaper 1E is preferably the scope of more than 10% and less than 50% relative to the area of above-mentioned overlapping region, and then is preferably more than 15% and the scope of less than 40%.

There is no particular restriction for the shape of weld portion 61 (the 3rd weld portion 613), except the ellipse of the lengthwise as diaper 1E, also can be arbitrary shape such as such as circle, rhombus, triangle, polygon etc.About the 3rd weld portion 613 weld portion 61, the number of its 1 involution pattern area, interval that Y-direction is adjacent, configuration, the ratio of total involution pattern area are identical with the weld portion 61 (the 1st weld portion 611 and the 2nd weld portion 612) of diaper 1B.

Action effect when using above-mentioned diaper 1E is described.

About the effect of diaper 1E, the aspect different from the effect of diaper 1B is described.Not specified aspect is identical with the effect of diaper 1B, suitably the explanation of the effect of application diaper 1B.

In diaper 1E, both ends 7E, 7E of the Y-direction of interval as shown in figure 12 in non-set out region 7 of non-set out region 7 expand.Therefore, when wearing diaper 1E, stretch magic tape 4 to pull, when retractility waist panel 3 is extended, the edge, periphery of retractility waist panel 3 is easier towards skin opposite face (face of P side) side, and therefore use sense improves further.

In addition, the 1st engaging zones 6 of diaper 1E becomes the convex protruded towards X-direction foreign side as shown in figure 12.Therefore, when wearing diaper 1E, when stretching magic tape 4 to pull, easily can make the tensile force dispersion putting on the 1st engaging zones 6, preventing breakage.

Then, to the magic tape 4 of diaper 1F and being fixedly described in detail of retractility flank sheet 3.

In diaper 1F, in the same manner as diaper 1B, as shown in figure 13, the foreign side anchor portion 33O of the elastomeric element 33 that the ratio that the interior side of the X-direction of magic tape 4 (near centre line C L) side is only installed in the non-skin lateral plate 32 forming retractility flank sheet 3 via the 1st engaging zones 6 is thread by the extension 32S of X-direction foreign side, and is only installed on the non-skin opposite face (face of Q side) of extension 32S via the 1st engaging zones 6.So, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3.

In addition, in diaper 1F, magic tape 4 and retractility flank sheet 3 are fixed by means of only bonding agent.

1st engaging zones 6 of diaper 1F comprises the bonding agent junction surface 63 using bonding agent to engage magic tape 4 and retractility flank sheet 3.Bonding agent junction surface 63 is formed throughout the total length of the Y-direction of magic tape 4 continuously along Y-direction.And then specifically, as shown in figure 13, the 1st engaging zones 6 of diaper 1F becomes the convex protruded towards X-direction foreign side becoming summit in the position of the centre line C L 3 along long side direction extension of magic tape 4 by bonding agent junction surface 63.Therefore, the non-set out region 7 of diaper 1F becomes the spill towards X-direction foreign side depression.Specifically, the non-set out region 7 of diaper 1F is formed as going and the interval of X-direction expands gradually from the bottom of the centre line C L 3 being positioned at magic tape 4 towards the above-below direction of centre line C L 3.The non-set out region 7 of the diaper 1F of formation like this is formed continuously along Y-direction, and both ends 7E, 7E of being interposed between the Y-direction in non-set out region 7 between non-set out region 7 expand.

With regard to the viewpoint of adhesive strength, the 1st engaging zones 6 of diaper 1F is preferably the scope of more than 50% and less than 90% relative to the area of above-mentioned overlapping region, and then is preferably more than 60% and the scope of less than 90%.

With regard to the viewpoint of the degree of freedom maintenance of the side edge part of the retractility flank sheet 3 during with regard to wearing, the non-set out region 7 of diaper 1F is preferably the scope of more than 10% and less than 50% relative to the area of above-mentioned overlapping region, and then is preferably more than 10% and the scope of less than 40%.

Action effect when using above-mentioned diaper 1F is described.

About the effect of diaper 1F, the aspect different from the effect of diaper 1B is described.Not specified aspect, identical with the effect of diaper 1B, the suitably explanation of the effect of application diaper 1B.

In diaper 1F, both ends 7E, 7E of the Y-direction of interval as shown in figure 13 in non-set out region 7 of non-set out region 7 expand.Therefore, when wearing diaper 1F, stretch magic tape 4 to pull, when retractility waist panel 3 is extended, the edge, periphery of retractility waist panel 3 is easier in skin opposite face (face of P side) side, and therefore use sense improves further.

In addition, 1st engaging zones 6 of diaper 1F is formed by means of only bonding agent, therefore pliability improves, and, as shown in figure 13, become the convex protruded towards X-direction foreign side, therefore when wearing diaper 1F, when stretching magic tape 4 to pull, easily can make the tensile force dispersion putting on the 1st engaging zones 6, prevent breakage.

Then, to the magic tape 4 of diaper 1G and being fixedly described in detail of retractility flank sheet 3.

In diaper 1G, in the same manner as diaper 1B, as shown in figure 14, the foreign side anchor portion 33O of the elastomeric element 33 that the ratio that the interior side of the X-direction of magic tape 4 (near centre line C L) side is only installed in the non-skin lateral plate 32 forming retractility flank sheet 3 via the 1st engaging zones 6 is thread by the extension 32S of X-direction foreign side, and is only installed on the non-skin opposite face (face of Q side) of extension 32S via the 1st engaging zones 6.So, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3.

In addition, in diaper 1G, magic tape 4 and retractility flank sheet 3 are fixed by means of only bonding agent.

1st engaging zones 6 of diaper 1G comprises the bonding agent junction surface 63 using bonding agent to engage magic tape 4 and retractility flank sheet 3.Bonding agent junction surface 63 is formed throughout the total length of the Y-direction of magic tape 4 continuously along Y-direction.More specifically, the 1st engaging zones 6 of diaper 1G as shown in figure 14, by bonding agent junction surface 63, and becomes in the convex protruded towards X-direction foreign side becoming summit along centre line C L 3 position by the top that long side direction extends than magic tape 4.Therefore, the non-set out region 7 of diaper 1G becomes the spill towards X-direction foreign side depression.Specifically, the non-set out region 7 of diaper 1G is formed as having in centre line C L 3 position by the top than magic tape 4 bottom, and to go and the interval of X-direction expands gradually from bottom this towards the above-below direction of centre line C L 3.The non-set out region 7 of the diaper 1G of formation like this is formed continuously along Y-direction, and the centre line C L 3 being interposed between specific viscosity cingulum 4 between non-set out region 7 becomes the narrowest in place by the top.

With regard to the viewpoint of adhesive strength, the 1st engaging zones 6 of diaper 1G is preferably the scope of more than 50% and less than 90% relative to the area of above-mentioned overlapping region, and then is preferably more than 60% and the scope of less than 90%.

With regard to the viewpoint of the degree of freedom maintenance of the side edge part of the retractility flank sheet 3 during with regard to wearing, the non-set out region 7 of diaper 1G is preferably the scope of more than 10% and less than 50% relative to the area of above-mentioned overlapping region, and then is preferably more than 10% and the scope of less than 40%.So, as the scope of the 1st engaging zones 6 of diaper 1G, identical with the scope of the 1st engaging zones 6 of diaper 1F.

Action effect when using above-mentioned diaper 1G is described.

About the effect of diaper 1G, the aspect different from the effect of diaper 1B is described.Not specified aspect is identical with the effect of diaper 1B, suitably the explanation of the effect of application diaper 1B.

In diaper 1G, the interval of non-set out region 7 becomes the narrowest in place by the top in the centre line C L 3 than magic tape 4 as shown in figure 14.Therefore, when wearing diaper 1G, stretch magic tape 4 to pull, when retractility waist panel 3 is extended, the especially below of the edge, periphery of retractility waist panel 3 is easier towards skin opposite face (face of P side) side, and therefore use sense improves further.

In addition, 1st engaging zones 6 of diaper 1G is formed by means of only bonding agent, therefore pliability improves, and become the convex protruded towards X-direction foreign side as shown in figure 14, therefore when wearing diaper 1G, when stretching magic tape 4 to pull, easily can make the tensile force dispersion putting on the 1st engaging zones 6, prevent breakage.

The disposable diaper of the present invention's (the 2nd invention), not by any restriction of diaper 1B of above-mentioned present embodiment, can suitably change.

The disposable diaper of the present invention's (the 2nd invention), not by any restriction of diaper 1B ~ 1G of above-mentioned 1st ~ 6th embodiment, can suitably change.In addition, each formation major part in the diaper 1B ~ 1G of above-mentioned 1st ~ 6th embodiment can be appropriately combined and implement in the scope of the purport of harmless the present invention (the 2nd invention).

Such as, in the diaper 1B ~ 1G of above-mentioned 1st ~ 6th embodiment, as shown in Fig. 7, Figure 10, Figure 11, Figure 12, Figure 13 or Figure 14, as retractility flank sheet 3, be used in the multiple thread elastomeric element 33 fixing the state that X-direction is extended between skin lateral plate 31 and non-skin lateral plate 32 and the parts formed, but also can replace, use the non-woven fabrics of the film of such as retractility, retractility, the fabric of retractility or their lamination sheets etc.

In addition, in the diaper 1B ~ 1G of above-mentioned 1st ~ 6th embodiment, as shown in Figure 8, magic tape 4 is only installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3, as long as but be at least installed on the non-skin opposite face (face of Q side) of retractility flank sheet 3.

The part that only an above-mentioned embodiment has all suitably mutually can utilize between this invention in each invention (the 1st and the 2nd invention) or respectively.

About above-mentioned embodiment, and then disclose following disposable diaper.

＜1＞

A kind of disposable diaper, it comprises the absorbent main body of lengthwise, this absorbent main body comprise liquid retainability absorber, be configured at the positive dough sheet of the skin opposite face side of this absorber and be configured at the back sheet of non-skin opposite face side of this absorber, and to be divided into when wearing in the veutro portion of the veutro of wearer, in the drosal part of dorsal part and the crotch that is configured between this veutro portion and this drosal part

The retractility flank sheet extended to width foreign side is separately installed with in the both sides of the end side of the long side direction of above-mentioned absorbent main body, at the lateral part along main body long side direction of this retractility flank sheet, the magic tape extended to width foreign side is installed

Above-mentioned magic tape is installed on the non-skin opposite face of above-mentioned retractility flank sheet,

Above-mentioned magic tape from the 1st bonding land that the lateral border along main body long side direction of above-mentioned retractility flank sheet engages through bonding agent at spaced intervals in above-mentioned absorbent main body side with the chip bonding of above-mentioned retractility flank,

Between above-mentioned engaging zones and the lateral border of above-mentioned retractility flank sheet, the non-set out region do not engaged throughout the above-mentioned magic tape of continuous formation and the above-mentioned retractility flank sheet endlong of main body long side direction or the 2nd weak engaging zones, above-mentioned 2nd weak engaging zones is more configuring by outside width adjacently than above-mentioned 1st engaging zones, and bond strength is weaker than above-mentioned 1st engaging zones.

＜2＞

As the disposable diaper of < 1 >, wherein, above-mentioned 1st engaging zones is engaged by bonding agent, and engaged by multiple involution junction surface, above-mentioned involution junction surface is formed by any one in the crimping processing carried out with embossing, heat sealing or ultrasonic sealing function.

＜3＞

As the disposable diaper of < 1 > or < 2 >, wherein, above-mentioned flank sheet is retractility flank sheet.

＜4＞

As the disposable diaper any one of < 1 > to < 3 >, wherein, above-mentioned magic tape is only installed on the non-skin opposite face of above-mentioned flank sheet.

＜5＞

As the disposable diaper any one of < 1 > to < 4 >, wherein, at above-mentioned 2nd weak engaging zones, the multiple involution junction surface only formed through embossing processing, heat sealing or ultrasonic sealing function and engaging.

＜6＞

As the disposable diaper of < 5 >, wherein, above-mentioned 2nd weak engaging zones comprises above-mentioned multiple involution junction surface and is configured at disengaged portion each other, this adjacent junction surface.

＜7＞

As the disposable diaper of < 5 > or < 6 >, wherein, a part of junction surface in above-mentioned multiple involution junction surface is stepped up the lateral border at main body long side direction of stating flank sheet and is extended to width foreign side.

＜8＞

As the disposable diaper any one of < 5 > to < 7 >, wherein, stretch when wearing above-mentioned magic tape, being configured at by outside width and by 1 involution junction surface of crotch side in above-mentioned multiple involution junction surface, the angle of inclination of the 1st imaginary line of its angle of inclination and the above-mentioned flank sheet of link and the intersection point of crotch side of above-mentioned magic tape and the intersection point of the crotch side of above-mentioned flank sheet and above-mentioned absorbent main body is roughly consistent.

＜9＞

As the disposable diaper any one of < 3 > to < 8 >, wherein, above-mentioned retractility flank sheet is the skin lateral plate that is fixed on by the multiple thread elastomeric element of the state of extending in body width direction in skin opposite face side and is formed between the non-skin lateral plate of non-skin opposite face side, and above-mentioned engaging zones is overlapping with a part for the anchor portion in the outside of the above-mentioned elastomeric element in above-mentioned retractility flank sheet.

＜10＞

As the disposable diaper of < 9 >, wherein, above-mentioned retractility flank sheet arranges fixing multiple thread elastomeric element and is formed between the skin lateral plate formed by non-woven fabrics and non-skin lateral plate.

＜11＞

As the disposable diaper of < 9 > or < 10 >, wherein, the thread elastomeric element Usage profile in above-mentioned retractility flank sheet is the parts of any number of narrow band shape in circular, square, rectangle.

＜12＞

As the disposable diaper any one of < 9 > to < 11 >, wherein, the width or the diameter that are configured at the thread elastomeric element of above-mentioned retractility flank sheet are preferably more than 0.1mm and below 2mm, are more preferably more than 0.1mm and below 1mm.

＜13＞

As the disposable diaper any one of < 9 > to < 12 >, wherein, the number being configured at the thread elastomeric element of above-mentioned retractility flank sheet is preferably more than 1 and less than 25, is more preferably more than 3 and less than 20.

＜14＞

As the disposable diaper any one of < 9 > to < 13 >, wherein, above-mentioned thread elastomeric element be stretched to percentage elongation 100% time stress be more than 0.1N and 1 thread elastomeric element of below 1N preferably arranges fixing with the state of extending in the scope of percentage elongation more than 50% and less than 300%, and then preferably with more than 100% and the state that the scope of less than 250% is extended arranges fixing.

＜15＞

As the disposable diaper any one of < 3 > to < 8 >, wherein, above-mentioned retractility flank sheet is used in two non-woven fabrics and arranges the complex of the net securing elastomer film or be made up of elastomer between skin lateral plate and non-skin lateral plate.

＜16＞

As the disposable diaper of < 15 >, wherein, arrange the above-mentioned retractility lateral plate of the net being fixed with elastomer film or be made up of elastomer, the stress of every 25mm width when being stretched to percentage elongation 100% is more than 3N/25mm and the net of 25N/25mm arranges fixing formation with the state of extending in the scope of percentage elongation more than 50% and less than 300%, preferably with more than 100% and the state that the scope of less than 250% is extended arrange and fix and formed.

＜17＞

As the disposable diaper any one of < 9 > to < 14 >, wherein, above-mentioned flank sheet has the bond layer be fixed on by multiple thread elastomeric element between skin lateral plate and non-skin lateral plate, this bond layer comprises the fixing main body side bond layer of the end side of the absorbent main body side of each elastomeric element, the outside bond layer that the end side of the lateral part side of the flank sheet of this each elastomeric element is fixed and the middle bond layer being configured at this main body side bond layer and fixing between bond layer and by two sheets outside this.

＜18＞

As the disposable diaper of < 17 >, wherein, the above-mentioned region of middle bond layer between main body side bond layer and outside bond layer is provided with multiple, middle bond layer is in diaper, width is less than any one in above-mentioned two bond layers, and configures discontinuously at width at zone line.

＜19＞

As the disposable diaper of < 17 > or < 18 >, wherein, aforementioned body side bonds oxidant layer, outside bond layer and middle bond layer and each elastomeric element extend along long side direction across, and the total length of long side direction throughout retractility flank sheet.

＜20＞

As the disposable diaper any one of < 3 > to < 19 >, wherein, in above-mentioned flank sheet, under the naturalness of above-mentioned elastic components contract, multiple pleat is formed on the two sides of flank sheet, each pleat is formed extended at both sides at long side direction in the mode of intersecting with multiple elastomeric element, be formed at the pleat of flank sheet, it is the contraction by elastomeric element between main body side bond layer and front bond layer, two sheets swell for convex in each non-adhesive region to the direction left from elastomeric element, be formed as concavity at each middle bond layer towards elastomeric element on the other hand to be formed, and there is concaveconvex shape.

＜21＞

As the disposable diaper any one of < 3 > to < 20 >, wherein, the length at long side direction of the retractility flank sheet in the engaging zones that above-mentioned retractility flank sheet is overlapping with magic tape, is longer than the length at long side direction of the magic tape in the engaging zones of this overlap.

＜22＞

As the disposable diaper of < 21 >, wherein, the engaging zones of above-mentioned overlap is more than 1.2 times of the length of the long side direction of magic tape and less than 3.5 times, is preferably more than 1.4 times and less than 3.0 times.

＜23＞

As the disposable diaper of < 21 > or < 22 >, wherein, the engaging zones of above-mentioned overlap is the scope of more than 10% and less than 50% relative to the gross area of the retractility flank sheet during retractility flank sheet overlooked under naturalness, is preferably more than 10% and the scope of less than 40%.

＜24＞

As the disposable diaper any one of < 1 > to < 23 >, wherein, the shape at above-mentioned involution junction surface is ellipse, circle, rhombus, triangle, polygonal shape.

＜25＞

As the disposable diaper of < 24 >, wherein, the involution pattern area at above-mentioned involution junction surface is 2mm ²above and 30mm ²below, 2mm is preferably ²above and 20mm ²below.

＜26＞

As the disposable diaper of < 24 > or < 25 >, wherein, above-mentioned involution junction surface each other be spaced apart more than 1mm and below 8mm.

＜27＞

As the disposable diaper any one of < 3 > to < 26 >, wherein, the magic tape being arranged at the lateral part of above-mentioned retractility flank sheet comprises band substrate sheets and has the hook side part of multiple engaging protrusion in the outside of the width of band substrate sheets, magic tape folds before use, launch in use to use, magic tape is at the longer rectangle of width X-direction in the deployed state, magic tape is fixed hook side part in the outside of the width being formed as the band substrate sheets identical with the plan view shape of magic tape and is formed.

＜28＞

As the disposable diaper any one of < 1 > to < 27 >, wherein, the outer surface in the veutro portion of above-mentioned disposable diaper be provided with make the hook side part set of magic tape take sheet.

＜29＞

As the disposable diaper any one of < 1 > to < 28 >, wherein, sidepiece sheet is configured with across positive dough sheet respectively in the both sides along long side direction of absorbent main body.

＜30＞

As the disposable diaper of < 29 >, wherein, above-mentioned sidepiece sheet arranges fixing throughout the whole region of sidepiece along long side direction in the skin opposite face side of positive dough sheet, the medial end of the width of sidepiece sheet becomes free end, arrange with the state of extending at long side direction near the free end of crotch and be fixed with three-dimensional fold formation elastomeric element, when wearing, by the contractility of this elastomeric element, from free end, the part of Rack is left from positive dough sheet and forms three-dimensional fold.And then, be bonded to sidepiece sheet and back sheet that the foreign side to width extends in the both sides along long side direction of absorbent main body respectively and form wing flap portion, in diaper, the elastomeric element that leg creases is formed arranges the wing flap portion being fixed on crotch with the state of extending at long side direction, when wearing, form leg creases by the contractility of this elastomeric element.

＜31＞

As the disposable diaper any one of above-mentioned < 1 > to < 30 >, wherein, the length of the edge, outside along main body long side direction of above-mentioned retractility flank sheet, is formed as the length of the main body long side direction in the 1st engaging zones being longer than above-mentioned magic tape.

＜32＞

As the disposable diaper any one of above-mentioned < 1 > to < 31 >, wherein, above-mentioned 1st engaging zones is formed by heat sealing or ultrasonic sealing function.

＜33＞

As the disposable diaper any one of above-mentioned < 1 > to < 33 >, wherein, above-mentioned 1st engaging zones comprises: the weld portion of above-mentioned magic tape and the welding of above-mentioned retractility flank sheet; With the non-weld portion not having the above-mentioned magic tape of welding and above-mentioned retractility flank sheet.

＜34＞

As the disposable diaper any one of above-mentioned < 1 > to < 33 >, wherein, the weld portion that above-mentioned 1st engaging zones has multiple little shape is arranged in the weld portion row of main body long side direction regularly, this weld portion is listed in body width direction and is arranged with multiple, and adjacent weld portion is not each other to be in staggered configuration in body width direction mode side by side.

＜35＞

As the disposable diaper any one of above-mentioned < 1 > to < 34 >, wherein, above-mentioned 1st engaging zones is formed by bonding agent.

＜36＞

As the disposable diaper any one of above-mentioned < 1 > to < 35 >, wherein, above-mentioned retractility flank sheet is the skin lateral plate that is fixed on by multiple elastomeric elements of the state of extending in body width direction in skin opposite face side and is formed between the non-skin lateral plate of non-skin opposite face side

Above-mentioned 1st engaging zones is overlapping with a part for foreign side's anchor portion of the above-mentioned elastomeric element in above-mentioned retractility flank sheet.

＜37＞

As the disposable diaper any one of above-mentioned < 1 > to < 36 >, wherein, above-mentioned retractility flank sheet is arranged fixing complex as the elastomer film of elastomeric element and the net that is made up of elastomer with extended configuration formed by overlapping between two non-woven fabrics

＜38＞

As the disposable diaper any one of above-mentioned < 1 > to < 37 >, wherein, above-mentioned retractility flank sheet is the skin lateral plate that is fixed on by multiple elastomeric elements of the state of extending in body width direction in skin opposite face side and is formed between the non-skin lateral plate of non-skin opposite face side, or arranging fixing complex as the elastomer film of this elastomeric element and the net that is made up of elastomer with extended configuration by overlap is formed

Above-mentioned skin lateral plate is different from the development length of the sidepiece from above-mentioned absorbent main body of above-mentioned non-skin lateral plate.

＜39＞

As the disposable diaper any one of above-mentioned < 1 > to < 38 >, wherein, the both ends being interposed between main body long side direction between above-mentioned non-set out region expand.

＜40＞

As the disposable diaper any one of above-mentioned < 1 > to < 39 >, wherein, be interposed between above-mentioned non-set out region than above-mentioned magic tape long side direction extend centrage become the narrowest in place by the top.

＜41＞

As the disposable diaper any one of above-mentioned < 1 > to < 40 >, wherein, above-mentioned positive dough sheet and above-mentioned outer composite sheet cover whole of the skin opposite face of above-mentioned absorber and whole of non-skin opposite face respectively, extend from the periphery of this absorber, the part of extending, is fixed by weldings such as bonding agent or heat sealing such as hot melts.

＜42＞

As the disposable diaper any one of above-mentioned < 1 > to < 41 >, wherein, at the sidepiece along main body long side direction (Y-direction) of above-mentioned absorbent main body, be configured with sidepiece sheet across above-mentioned positive dough sheet.

＜43＞

As the disposable diaper of above-mentioned < 42 >, wherein, above-mentioned sidepiece sheet arranges fixing in the skin opposite face side of above-mentioned positive dough sheet throughout the ground, sidepiece whole region along main body long side direction (Y-direction),

The medial end in the body width direction (X-direction) of above-mentioned sidepiece sheet becomes free end, arrange with the state of extending at main body long side direction (Y-direction) near this free end of crotch and be fixed with three-dimensional fold formation elastomeric element, when wearing, by the contractility of this elastomeric element, from this free end, the part of Rack is left from above-mentioned positive dough sheet and forms three-dimensional fold.

＜44＞

As the disposable diaper of above-mentioned < 42 > or < 43 >, wherein, at the sidepiece along main body long side direction (Y-direction) of above-mentioned absorbent main body, engage the above-mentioned sidepiece sheet and above-mentioned outer composite sheet that extend to the outside of body width direction (X-direction), and form wing flap portion.

＜45＞

As the disposable diaper of above-mentioned < 44 >, wherein, in above-mentioned disposable diaper, leg creases formation elastomeric element arranges the above-mentioned wing flap portion being fixed on crotch with the state of extending at main body long side direction (Y-direction), when wearing, form leg creases by the contractility of this elastomeric element.

＜46＞

As the disposable diaper any one of above-mentioned < 1 > to < 45 >, wherein, above-mentioned retractility flank sheet is rectangle, trapezoidal or comprise the shape of curve expanding under plane state.

＜47＞

As the disposable diaper any one of above-mentioned < 1 > to < 46 >, wherein, be configured with thread elastomeric element at above-mentioned retractility flank sheet,

The width or the diameter that are configured at the thread above-mentioned elastomeric element of above-mentioned retractility flank sheet are more than 0.1mm and below 2mm.

＜48＞

As the disposable diaper of above-mentioned < 47 >, wherein, be configured with thread elastomeric element at above-mentioned retractility flank sheet,

The number being configured at the above-mentioned elastomeric element of above-mentioned retractility flank sheet is more than 1 and less than 25.

＜49＞

As the disposable diaper any one of above-mentioned < 1 > to < 48 >, wherein, above-mentioned retractility flank sheet is the skin lateral plate that is fixed on by the multiple thread elastomeric element of the state of extending in body width direction in skin opposite face side and is formed between the non-skin lateral plate of non-skin opposite face side

The multiple bonding agent extended at main body long side direction (Y-direction) that above-mentioned elastomeric element intersects via this elastomeric element and be fixed between above-mentioned skin lateral plate and above-mentioned non-skin lateral plate, and do not arranging the position of this elastomeric element, this skin lateral plate and this non-skin lateral plate directly engage via above-mentioned bonding agent each other.

＜50＞

As the disposable diaper of above-mentioned < 49 >, wherein, multiple above-mentioned bonding agent, all intersect with all elastomeric elements extended in body width direction (X-direction), the total length of the Y-direction in main body long side direction (Y-direction) extension and throughout above-mentioned retractility flank sheet.

＜51＞

As the disposable diaper of above-mentioned < 49 > or < 50 >, wherein, above-mentioned retractility flank sheet fixing except utilize above-mentioned bonding agent to carry out fixing except, also combine the welding utilizing heat sealing to carry out and fixedly implement.

＜52＞

As the disposable diaper any one of above-mentioned < 1 > to < 51 >, wherein, the above-mentioned skin lateral plate of above-mentioned retractility flank sheet has the extension extended to body width direction (X-direction) outside than foreign side's anchor portion in the body width direction (X-direction) of multiple thread above-mentioned elastomeric element, above-mentioned non-skin lateral plate has the extension extended to body width direction (X-direction) outside than foreign side's anchor portion in the body width direction (X-direction) of multiple thread above-mentioned elastomeric element similarly.

＜53＞

As the disposable diaper any one of above-mentioned < 1 > to < 52 >, wherein, above-mentioned magic tape comprises band substrate sheets and has the hook side part of multiple engaging protrusion in the outside in the body width direction (X-direction) of band substrate sheets

Above-mentioned magic tape folds before use, launches in use to use.

＜54＞

As the disposable diaper of above-mentioned < 24 >, wherein, above-mentioned magic tape is at body width direction (X-direction) longer rectangle in the deployed state, and

The outside in the body width direction (X-direction) of the above-mentioned band substrate sheets be identically formed at the plan view shape with above-mentioned magic tape is fixed above-mentioned hook side part and is formed,

Be provided with at the outer surface in the veutro portion of above-mentioned disposable diaper make the above-mentioned hook side part set of above-mentioned magic tape take sheet.

＜55＞

As the disposable diaper any one of above-mentioned < 1 > to < 54 >, wherein, above-mentioned magic tape is only installed on the non-skin opposite face of above-mentioned retractility flank sheet.

＜56＞

As the disposable diaper any one of above-mentioned < 1 > to < 55 >, wherein, the inner side in the body width direction (X-direction) of above-mentioned magic tape is only installed on foreign side's anchor portion of the ratio elastomeric element in the non-skin lateral plate forming above-mentioned retractility flank sheet more by the extension in outside, body width direction (X-direction), and is only installed on the non-skin opposite face of this extension.

＜57＞

As the disposable diaper of above-mentioned < 33 >, wherein, above-mentioned weld portion comprises the 1st weld portion relative to the angled lengthwise of main body long side direction (Y-direction) tool and the 2nd weld portion made towards the lengthwise relative with the 1st weld portion.

＜58＞

As the disposable diaper of above-mentioned < 33 > or < 28 >, wherein, the shape of above-mentioned weld portion is ellipse, circle, rhombus, triangle, the polygon of lengthwise.

＜59＞

As above-mentioned < 33 >, < 57 disposable diaper of > or < 58 >, wherein, the involution pattern area of above-mentioned weld portion is 2mm ²above and 30mm ²below.

＜60＞

As the disposable diaper any one of above-mentioned < 1 > to < 59 >, wherein, the length in main body long side direction (Y-direction) of this retractility flank sheet in the region that above-mentioned retractility flank sheet is overlapping with above-mentioned magic tape, is more than 1.2 times of the length at main body long side direction (Y-direction) of this magic tape in this overlapping region and less than 3.5 times.

＜61＞

As the disposable diaper of above-mentioned < 60 >, wherein, above-mentioned overlapping region is the scope of more than 10% and less than 50% relative to the gross area of this retractility flank sheet during the above-mentioned retractility flank sheet overlooked under naturalness.

＜62＞

As the disposable diaper of above-mentioned < 60 > or < 61 >, wherein, above-mentioned 1st engaging zones is the scope of more than 40% and less than 90% relative to the area of above-mentioned overlapping region.

＜63＞

As the disposable diaper any one of above-mentioned < 60 > to < 62 >, wherein, above-mentioned non-set out region is the scope of more than 10% and less than 50% relative to the area of above-mentioned overlapping region.

＜64＞

As the disposable diaper of above-mentioned < 33 >, wherein, above-mentioned weld portion only comprises the 1st weld portion relative to the angled lengthwise of main body long side direction (Y-direction) tool,

At above-mentioned 1st engaging zones, 1st weld portion to be configured discontinuously at main body long side direction (Y-direction) and the weld portion group extended at main body long side direction (Y-direction) formed forms two row in body width direction (X-direction)

Adjacent above-mentioned weld portion becomes non-weld portion each other.

＜65＞

As the disposable diaper of above-mentioned < 33 >, wherein, above-mentioned weld portion only comprises the 3rd weld portion of the lengthwise extended abreast with body width direction (X-direction),

At above-mentioned 1st engaging zones, by above-mentioned 3rd weld portion main body long side direction (Y-direction) configure discontinuously and be formed as to body width direction (X-direction) outside protrude weld portion group form two row in body width direction (X-direction)

Above-mentioned 1st engaging zones, becomes by the two above-mentioned weld portion groups of row the shape protruded to body width direction (X-direction) outside becoming summit in the position of the centrage along long side direction extension of above-mentioned magic tape,

Above-mentioned non-set out region becomes the shape to body width direction (X-direction) outside depression,

Above-mentioned non-set out region goes to the interval in body width direction (X-direction) to expand gradually from the bottom of the centrage being positioned at above-mentioned magic tape towards the above-below direction of centrage,

Above-mentioned non-set out region is formed continuously at main body long side direction (Y-direction), and the both ends being interposed between the main body long side direction (Y-direction) of this non-set out region between this non-set out region expand.

＜66＞

As the disposable diaper of above-mentioned < 1 > or < 31 >, wherein, above-mentioned magic tape and above-mentioned retractility flank sheet are fixed by means of only bonding agent,

Above-mentioned 1st engaging zones comprises the bonding agent junction surface using bonding agent to engage above-mentioned magic tape and above-mentioned retractility flank sheet,

Above-mentioned bonding agent junction surface at main body long side direction (Y-direction) continuously throughout the total length of the main body long side direction (Y-direction) of above-mentioned magic tape,

Above-mentioned 1st engaging zones, by above-mentioned bonding agent junction surface, becomes the shape protruded to body width direction (X-direction) outside becoming summit in the position of the centrage along long side direction extension of above-mentioned magic tape,

＜67＞

Above-mentioned 1st engaging zones by above-mentioned bonding agent junction surface, and becomes in the shape protruded to body width direction (X-direction) outside becoming summit along the centrage position by the top that long side direction extends than above-mentioned magic tape,

Above-mentioned non-set out region has bottom in the position by the top of the centrage than above-mentioned magic tape, and goes to the interval in body width direction (X-direction) to expand gradually from bottom this towards the above-below direction of centrage,

Above-mentioned non-set out region is formed continuously at main body long side direction (Y-direction), and the centrage being interposed between specific viscosity cingulum between above-mentioned non-set out region becomes the narrowest in place by the top.

＜68＞

As the disposable diaper any one of above-mentioned < 1 > to < 67 >, wherein, the bond strength of above-mentioned 2nd weak engaging zones be the bond strength of above-mentioned 1st engaging zones more than 5% and less than 70%, be more preferably more than 20% and the bond strength of less than 50%.

＜69＞

As the disposable diaper any one of above-mentioned < 1 > to < 68 >, wherein, the area in the region that above-mentioned non-set out region is overlapping with above-mentioned magic tape relative to above-mentioned retractility flank sheet is more than 10% and less than 50%, is preferably more than 15% and less than 40%.

Industrial utilizability

According to the present invention (the 1st invention), provide a kind of when wear diaper magic tape and flank sheet not easily produce wood destruction and damaged, the disposable diaper of use sense raising.

According to the present invention, provide a kind of when wear diaper, the edge, periphery of retractility waist panel easily towards skin opposite face side, the disposable diaper of use sense raising.

Claims

1. a disposable diaper, is characterized in that:

Comprise the absorbent main body of lengthwise, the absorbent main body of this lengthwise comprise liquid retainability absorber, be configured at the positive dough sheet of the skin opposite face side of this absorber and be configured at the back sheet of non-skin opposite face side of this absorber, and to be divided into when wearing in the veutro portion of the veutro of wearer, in the drosal part of dorsal part and the crotch that is configured between this veutro portion and this drosal part

The retractility flank sheet extended outside width is separately installed with in the both sides of the end side of the long side direction of described absorbent main body, at the lateral part along main body long side direction of this retractility flank sheet, the magic tape extended outside width is installed

Described magic tape is installed on the non-skin opposite face of described retractility flank sheet,

Described magic tape from the lateral border along main body long side direction of described retractility flank sheet in described absorbent main body side at spaced intervals via the 1st engaging zones utilizing bonding agent to engage and the chip bonding of described retractility flank,

Between described engaging zones and the lateral border of described retractility flank sheet, the non-set out region do not engaged throughout the described magic tape of continuous formation and the described retractility flank sheet endlong of the main body long side direction of described retractility flank sheet or the 2nd weak engaging zones, described 2nd weak engaging zones is more configuring by outside width adjacently than described 1st engaging zones, and bond strength is weaker than described 1st engaging zones.

2. disposable diaper as claimed in claim 1, is characterized in that:

Described 1st engaging zones utilizes bonding agent to engage, and is engaged by multiple involution junction surfaces, and described multiple involution junction surface is formed by any one utilizing in the crimping processing of embossing, heat sealing or ultrasonic sealing function.

3. disposable diaper as claimed in claim 1 or 2, is characterized in that:

Described flank sheet is retractility flank sheet.

4. the disposable diaper according to any one of claims 1 to 3, is characterized in that:

Described magic tape is only installed on the non-skin opposite face of described flank sheet.

5. the disposable diaper according to any one of Claims 1 to 4, is characterized in that:

At described 2nd weak engaging zones, engage by means of only the multiple involution junction surfaces formed with embossing processing, heat sealing or ultrasonic sealing function.

6. disposable diaper as claimed in claim 5, is characterized in that:

Described 2nd weak engaging zones comprises described multiple involution junction surface and is configured at disengaged portion each other, this adjacent junction surface.

7. the disposable diaper as described in claim 5 or 6, is characterized in that:

A part of junction surface in described multiple involution junction surface extends outside width across the lateral border along main body long side direction of described flank sheet.

8. the disposable diaper according to any one of claim 5 ~ 7, is characterized in that:

Stretch when wearing described magic tape, being configured at by outside width and by 1 involution junction surface of crotch side in described multiple involution junction surface, its angle of inclination is roughly consistent with the angle of inclination of the 1st imaginary line, wherein, described 1st imaginary line links the intersection point of the intersection point of the crotch side of described flank sheet and described magic tape and the crotch side of described flank sheet and described absorbent main body.

9. the disposable diaper according to any one of claim 3 ~ 8, is characterized in that:

Described retractility flank sheet the skin lateral plate in skin opposite face side and between the non-skin lateral plate of non-skin opposite face side the multiple thread elastomeric element of fixing state of extending along body width direction formed, described engaging zones is overlapping with a part for the anchor portion in the outside of the described elastomeric element in described retractility flank sheet.

10. disposable diaper as claimed in claim 9, is characterized in that:

Described retractility flank sheet arranges fixing multiple thread elastomeric element and is formed between the skin lateral plate formed by non-woven fabrics and non-skin lateral plate.

11. disposable diapers as described in claim 9 or 10, is characterized in that:

Thread elastomeric element Usage profile in described retractility flank sheet is the parts of any number of narrow band shape in circular, square, rectangle.

12. disposable diapers according to any one of claim 9 ~ 11, is characterized in that:

The width or the diameter that are configured at the thread elastomeric element of described retractility flank sheet are more than 0.1mm below 2mm.

13. disposable diapers according to any one of claim 9 ~ 12, is characterized in that:

The number being configured at the thread elastomeric element of described retractility flank sheet is more than 1 less than 25.

14. disposable diapers according to any one of claim 9 ~ 13, is characterized in that:

Described thread elastomeric element be stretched to percentage elongation 100% time stress be that 1 thread elastomeric element of more than 0.1N below 1N arranges fixing with the state of extending in the scope of percentage elongation more than 50% and less than 300%.

15. disposable diapers according to any one of claim 3 ~ 8, is characterized in that:

Described retractility flank sheet is used in the complex arranging the net being fixed with elastomer film or be made up of elastomer between skin lateral plate and non-skin lateral plate formed by non-woven fabrics.

16. disposable diapers as claimed in claim 15, is characterized in that:

Arranging the described retractility flank sheet of net being fixed with elastomer film or being made up of elastomer, is the stress of every 25mm width when being stretched to percentage elongation 100% is more than 3N/25mm and the net of below 25N/25mm arranges to fix with the state of extending in the scope of percentage elongation more than 50% and less than 300% and formed.

17. disposable diapers according to any one of claim 9 ~ 14, is characterized in that:

Described flank sheet has the bond layer be fixed on by multiple thread elastomeric element between skin lateral plate and non-skin lateral plate, and this bond layer comprises: the main body side bond layer fixing by the end side of the absorbent main body side of each elastomeric element; The outside bond layer fixing by the end side of the lateral part side of the flank sheet of this each elastomeric element; And the middle bond layer being configured at this main body side bond layer and fixing between bond layer and by two sheets outside this.

18. disposable diapers as claimed in claim 17, is characterized in that:

The described region of middle bond layer between main body side bond layer and outside bond layer is provided with multiple, and middle bond layer width in diaper is less than any one in described two bond layers, and configures discontinuously at width at zone line.

19. disposable diapers as described in claim 17 or 18, is characterized in that:

Described main body side bond layer, outside bond layer and middle bond layer and each elastomeric element extend at long side direction across, throughout the total length of the long side direction of retractility flank sheet.

20. disposable diapers according to any one of claim 3 ~ 19, is characterized in that:

In described flank sheet, under the naturalness of described elastic components contract, multiple pleat is formed on the two sides of flank sheet, each pleat is formed extended at both sides at long side direction in the mode of intersecting with multiple elastomeric element, be formed at the pleat of flank sheet, between main body side bond layer and front bond layer, swell for convex in each non-adhesive region to the direction left from elastomeric element by contraction two sheets of elastomeric element, be formed as concavity at each middle bond layer towards elastomeric element to be formed, there is concaveconvex shape.

21. disposable diapers according to any one of claim 3 ~ 20, is characterized in that:

The length at long side direction of being longer than the magic tape in the engaging zones of this overlap in the length of long side direction of the retractility flank sheet in the engaging zones that described retractility flank sheet is overlapping with magic tape.

22. disposable diapers as claimed in claim 21, is characterized in that:

The engaging zones of described overlap is more than 1.2 times of the length at long side direction of magic tape and less than 3.5 times.

23. disposable diapers as described in claim 21 or 22, is characterized in that:

The engaging zones of described overlap is the scope of more than 10% and less than 50% relative to the gross area of the retractility flank sheet during retractility flank sheet overlooked under naturalness.

24. disposable diapers according to any one of claim 1 ~ 23, is characterized in that:

The shape at described involution junction surface is ellipse, circle, rhombus, triangle, polygonal shape.

25. disposable diapers as claimed in claim 24, is characterized in that:

The involution pattern area at described involution junction surface is 2mm ²above and 30mm ²below.

26. disposable diapers as described in claim 24 or 25, is characterized in that:

Described involution junction surface each other be spaced apart more than 1mm and below 8mm.

27. disposable diapers according to any one of claim 3 ~ 26, is characterized in that:

The magic tape being arranged at the lateral part of described retractility flank sheet comprises band substrate sheets and has the hook side part of multiple engaging protrusion in the outside of the width of band substrate sheets, magic tape folds before use, launch in use to use, magic tape is at the longer rectangle of width X-direction in the deployed state, and magic tape is fixed hook side part in the outside of the width being formed as the band substrate sheets identical with the plan view shape of magic tape and formed.

28. disposable diapers according to any one of claim 1 ~ 27, is characterized in that:

Be provided with at the outer surface in the veutro portion of described disposable diaper make the hook side part set of magic tape take sheet.

29. disposable diapers according to any one of claim 1 ~ 28, is characterized in that:

In the both sides along long side direction of absorbent main body, be configured with sidepiece sheet across positive dough sheet respectively.

30. disposable diapers as claimed in claim 29, is characterized in that:

Described sidepiece sheet arranges fixing throughout the whole region of sidepiece along long side direction in the skin opposite face side of positive dough sheet, the medial end of the width of sidepiece sheet becomes free end, arrange with the state of extending at long side direction near the free end of crotch and be fixed with three-dimensional fold formation elastomeric element, when wearing, by the contractility of this elastomeric element, from free end, the part of Rack is left from positive dough sheet and forms three-dimensional fold, and then, in the both sides along long side direction of absorbent main body, be bonded to the sidepiece sheet and back sheet that extend outside width respectively and form wing flap portion, leg creases formation elastomeric element arranges the wing flap portion being fixed on crotch with the state of extending at long side direction, when wearing, leg creases is formed by the contractility of this elastomeric element.

31. disposable diapers according to any one of claims 1 to 30, is characterized in that:

The length of the edge, outside along main body long side direction of described retractility flank sheet, is formed as the length of the main body long side direction be longer than in the 1st engaging zones of described magic tape.

32. disposable diapers according to any one of claims 1 to 31, is characterized in that:

Described 1st engaging zones is formed by heat sealing or ultrasonic sealing function.

33. disposable diapers according to any one of claim of right1~32, is characterized in that:

Described 1st engaging zones comprises: welding has the weld portion of described magic tape and described retractility flank sheet; With the non-weld portion not having magic tape described in welding and described retractility flank sheet.

34. disposable diapers according to any one of claim of right1~33, is characterized in that:

The weld portion row that the weld portion that described 1st engaging zones has multiple little shape arranges regularly at main body long side direction, this weld portion is listed in body width direction and is arranged with multiple, adjacent weld portion each other with in body width direction not mode be side by side in staggered configuration.

35. disposable diapers according to any one of claims 1 to 34, is characterized in that:

Described 1st engaging zones is formed by bonding agent.

36. disposable diapers according to any one of claims 1 to 35, is characterized in that:

Described retractility flank sheet is the skin lateral plate that is fixed on by multiple elastomeric elements of the state of extending in body width direction in skin opposite face side and is formed between the non-skin lateral plate of non-skin opposite face side,

Described 1st engaging zones is overlapping with a part for the outside anchor portion of the described elastomeric element in described retractility flank sheet.

37. disposable diapers according to any one of claims 1 to 36, is characterized in that:

Described retractility flank sheet be by between two non-woven fabrics using the elastomer film as elastomeric element and the net that is made up of elastomer overlapping and arrange fixing complex with extended configuration and formed,

Described 1st engaging zones is overlapping with a part for foreign side's anchor portion of the described elastomeric element in described retractility flank sheet.

38. disposable diapers according to any one of claims 1 to 37, is characterized in that:

Described retractility flank sheet the skin lateral plate in skin opposite face side and between the non-skin lateral plate of non-skin opposite face side multiple elastomeric elements of fixing state of extending along body width direction formed, or by using the elastomer film as this elastomeric element and the net that is made up of elastomer overlapping and arrange fixing complex with extended configuration and formed

Described skin lateral plate and described non-skin lateral plate, the development length extended from the sidepiece of described absorbent main body is different.

39. disposable diapers according to any one of claims 1 to 38, is characterized in that:

The both ends being interposed between main body long side direction between described non-set out region expand.

40. disposable diapers according to any one of claims 1 to 39, is characterized in that:

Be interposed between described non-set out region than described magic tape long side direction extend centrage become the narrowest in place by the top.

41. disposable diapers according to any one of Claims 1 to 40, is characterized in that:

Described positive dough sheet and described outer composite sheet cover whole of the skin opposite face of described absorber and whole of non-skin opposite face respectively, and extend from the periphery of this absorber, the part of extending, is fixed by weldings such as bonding agent or heat sealing such as hot melts.

42. disposable diapers according to any one of Claims 1 to 41, is characterized in that:

At the sidepiece along main body long side direction (Y-direction) of described absorbent main body, be configured with sidepiece sheet across described positive dough sheet.

43. disposable diapers as claimed in claim 42, is characterized in that:

Described sidepiece sheet is the skin opposite face side of described positive dough sheet, arranges fixing throughout the ground, sidepiece whole region along main body long side direction (Y-direction),

The medial end in the body width direction (X-direction) of described sidepiece sheet becomes free end, arrange with the state of extending at main body long side direction (Y-direction) near this free end of crotch and be fixed with three-dimensional fold formation elastomeric element, when wearing, by the contractility of this elastomeric element, from this free end, the part of Rack is left from described positive dough sheet and forms three-dimensional fold.

44. disposable diapers as described in claim 42 or 43, is characterized in that:

At the sidepiece along main body long side direction (Y-direction) of described absorbent main body, the described sidepiece sheet that the outside to body width direction (X-direction) is extended engages with described outer composite sheet, and is formed with wing flap portion.

45. disposable diapers as claimed in claim 44, is characterized in that:

In described disposable diaper, leg creases formation elastomeric element arranges the described wing flap portion being fixed on crotch with the state of extending at main body long side direction (Y-direction), when wearing, by the contractility of this elastomeric element, and form leg creases.

46. disposable diapers according to any one of Claims 1 to 45, is characterized in that:

Described retractility flank sheet is rectangle, trapezoidal or comprise the shape of curve expanding under plane state.

47. disposable diapers according to any one of Claims 1 to 46, is characterized in that:

Thread elastomeric element is configured with at described retractility flank sheet,

The width or the diameter that are configured at the thread described elastomeric element of described retractility flank sheet are more than 0.1mm and below 2mm.

48. disposable diapers as claimed in claim 47, is characterized in that:

The number being configured at the described elastomeric element of described retractility flank sheet is more than 1 and less than 25.

49. disposable diapers according to any one of Claims 1 to 48, is characterized in that:

Described retractility flank sheet is the skin lateral plate that is fixed on by the multiple thread elastomeric element of the state of extending in body width direction in skin opposite face side and is formed between the non-skin lateral plate of non-skin opposite face side,

The multiple bonding agents extended at main body long side direction (Y-direction) that described elastomeric element intersects via this elastomeric element are fixed between described skin lateral plate and described non-skin lateral plate, and do not configuring the position of this elastomeric element, this skin lateral plate and this non-skin lateral plate directly engage via described bonding agent each other.

50. disposable diapers as claimed in claim 49, is characterized in that:

Multiple described bonding agent all intersects with all elastomeric elements extended in body width direction (X-direction), the total length of the Y-direction in main body long side direction (Y-direction) extension and throughout described retractility flank sheet.

51. disposable diapers as described in claim 49 or 50, is characterized in that:

Described retractility flank sheet fixing except utilize described bonding agent fixing except, also combination utilizes the welding of heat sealing fixedly to implement.

52. disposable diapers according to any one of Claims 1 to 51, is characterized in that:

The described skin lateral plate of described retractility flank sheet has the extension extended to body width direction (X-direction) outside than the outside anchor portion in the body width direction (X-direction) of multiple thread described elastomeric element, and described non-skin lateral plate has the extension extended to body width direction (X-direction) outside than the outside anchor portion in the body width direction (X-direction) of multiple thread described elastomeric element too.

53. disposable diapers according to any one of Claims 1 to 52, is characterized in that:

Described magic tape comprises band substrate sheets and has the hook side part of multiple engaging protrusion in the outside in the body width direction (X-direction) of band substrate sheets,

Described magic tape folds before use, launches in use to use.

54. disposable diapers as claimed in claim 24, is characterized in that:

Described magic tape is at body width direction (X-direction) longer rectangle in the deployed state, and

The outside in the body width direction (X-direction) of the described band substrate sheets be identically formed at the plan view shape with described magic tape is fixed described hook side part and is formed,

Be provided with at the outer surface in the veutro portion of described disposable diaper make the described hook side part set of described magic tape take sheet.

55. disposable diapers according to any one of Claims 1 to 54, is characterized in that:

Described magic tape is only installed on the non-skin opposite face of described retractility flank sheet.

56. disposable diapers according to any one of Claims 1 to 55, is characterized in that:

The inner side in the body width direction (X-direction) of described magic tape is only installed on foreign side's anchor portion of the ratio elastomeric element in the non-skin lateral plate forming described retractility flank sheet more by the extension in outside, body width direction (X-direction), and is only installed on the non-skin opposite face of this extension.

57. disposable diapers as claimed in claim 33, is characterized in that:

Described weld portion comprises the 1st weld portion relative to the angled lengthwise of main body long side direction (Y-direction) tool and the 2nd weld portion made towards the lengthwise relative with the 1st weld portion.

58. disposable diapers as described in claim 33 or 57, is characterized in that:

The shape of described weld portion is ellipse, circle, rhombus, triangle, the polygon of lengthwise.

59. disposable diapers as described in claim 33,57 or 58, is characterized in that:

The involution pattern area of described weld portion is 2mm ²above and 30mm ²below.

60. disposable diapers according to any one of Claims 1 to 59, is characterized in that:

The length in main body long side direction (Y-direction) of this retractility flank sheet in the region that described retractility flank sheet is overlapping with described magic tape, is more than 1.2 times of the length at main body long side direction (Y-direction) of this magic tape in this overlapping region and less than 3.5 times.

61. disposable diapers as claimed in claim 60, is characterized in that:

Described overlapping region is the scope of more than 10% and less than 50% relative to the gross area of this retractility flank sheet during the described retractility flank sheet overlooked under naturalness.

62. disposable diapers as described in claim 60 or 61, is characterized in that:

Described 1st engaging zones is the scope of more than 40% and less than 90% relative to the area of described overlapping region.

63. disposable diapers according to any one of claim 60 ~ 62, is characterized in that:

Described non-set out region is the scope of more than 10% and less than 50% relative to the area of described overlapping region.

64. disposable diapers as claimed in claim 33, is characterized in that:

Described weld portion only comprises the 1st weld portion relative to the angled lengthwise of main body long side direction (Y-direction) tool,

At described 1st engaging zones, 1st weld portion to be configured discontinuously at main body long side direction (Y-direction) and the weld portion group extended at main body long side direction (Y-direction) formed forms two row in body width direction (X-direction)

Adjacent described weld portion becomes non-weld portion each other.

65. disposable diapers as claimed in claim 33, is characterized in that:

Described weld portion only comprises the 3rd weld portion of the lengthwise extended abreast with body width direction (X-direction),

At described 1st engaging zones, by described 3rd weld portion main body long side direction (Y-direction) configure discontinuously and be formed as to body width direction (X-direction) outside protrude weld portion group form two row in body width direction (X-direction)

Described 1st engaging zones by the described weld portion group of two row, and becomes the shape protruded to body width direction (X-direction) outside becoming summit in the position of the centrage along long side direction extension of described magic tape,

Described non-set out region becomes the shape to body width direction (X-direction) outside depression,

Described non-set out region goes to the interval in body width direction (X-direction) to expand gradually from the bottom of the centrage being positioned at described magic tape towards the above-below direction of centrage,

Described non-set out region is formed continuously at main body long side direction (Y-direction), and the both ends being interposed between the main body long side direction (Y-direction) of this non-set out region between this non-set out region expand.

66. disposable diapers as described in claim 1 or 31, is characterized in that:

Described magic tape and described retractility flank sheet are fixed by means of only bonding agent,

Described 1st engaging zones comprises the bonding agent junction surface using bonding agent to engage described magic tape and described retractility flank sheet,

Described bonding agent junction surface at main body long side direction (Y-direction) continuously throughout the total length of the main body long side direction (Y-direction) of described magic tape,

Described 1st engaging zones, by described bonding agent junction surface, becomes the shape protruded to body width direction (X-direction) outside becoming summit in the position of the centrage along long side direction extension of described magic tape,

67. disposable diapers as described in claim 1 or 31, is characterized in that:

Described 1st engaging zones, by described bonding agent junction surface, becomes in the shape protruded to body width direction (X-direction) outside becoming summit along the centrage position by the top that long side direction extends than described magic tape,

Described non-set out region has bottom in the position by the top of the centrage than described magic tape, bottom this, go to the interval in body width direction (X-direction) to expand gradually towards the above-below direction of centrage,

Described non-set out region is formed continuously at main body long side direction (Y-direction), and the centrage being interposed between specific viscosity cingulum between described non-set out region becomes the narrowest in place by the top.

68. disposable diapers according to any one of claim 1 ~ 67, is characterized in that:

The bond strength of described 2nd weak engaging zones be described 1st engaging zones more than 5% of bond strength and the bond strength of less than 70%.

69. disposable diapers according to any one of claim 1 ~ 68, is characterized in that:

The area in the region that described non-set out region is overlapping with described magic tape relative to described retractility flank sheet is more than 10% and less than 50%.