CN107613924B

CN107613924B - Absorbent commodity non-woven fabrics

Info

Publication number: CN107613924B
Application number: CN201580080363.3A
Authority: CN
Inventors: 宇田匡志; 坂口智; 深山拓也
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2015-05-29
Filing date: 2015-08-26
Publication date: 2019-08-02
Anticipated expiration: 2035-08-26
Also published as: TW201700813A; CN107613924A; JP2016220987A; JP6289418B2; WO2016194246A1; TWI675138B

Abstract

The present invention relates to the absorbent commodity non-woven fabrics for including the fibrous layer being made of thermoplastic resin fibre and the fibrous layer being made of thermoplastic resin fibre and cotton, a kind of intensity is provided and flexibility is excellent and for the liquid permeability of the body fluid such as urine, menses also excellent absorbent commodity non-woven fabrics.Absorbent commodity of the invention is constituted with non-woven fabrics (1) by least two fibre layers, and at least two fibre layers include: the 1st fibrous layer (2) for this comprising cotton (2a) and thermoplastic resin fibre (2b)；And the 2nd fibrous layer (3), it is adjacent at least single side of the 1st fibrous layer (2), containing thermoplastic resin fibre (3a) and cotton is not contained, the thermoplastic resin fibre (2b) contained by 1st fibrous layer (2) has the fibre diameter thinner than the fibre diameter of the thermoplastic resin fibre (3a) contained by the 2nd fibrous layer (3), and the non-woven fabrics (1) has the specific construction of multiple protrusions (4) and groove portion (5).

Description

Absorbent commodity non-woven fabrics

Technical field

The present invention relates to non-woven fabrics used in the absorbent commodities such as disposable diaper, sanitary napkin, incontinence pad.

Background technique

In the absorbent commodities such as disposable diaper, sanitary napkin, pacified to obtain by natural material bring Heart sense etc. has studied the non-woven fabrics containing the cotton as natural fiber as non-woven fabrics used in the member of formation such as surface patch.

A kind of staple fiber nonwoven fabric is proposed as such non-woven fabrics, such as in patent document 1, the staple fiber nonwoven fabric Mainly it is laminated in at least single side for the layer being made of the velveteen of fibre length 5mm by the staple fibers structure such as thermoplastic resin fibre At layer, staple fiber each other, velveteen each other and velveteen and staple fiber mutually dimensionally interweave carry out it is integrated made of.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2001-32157 bulletin

Summary of the invention

Problems to be solved by the invention

However, non-woven fabrics is such as disclosed in Patent Document 1, it is including being made of staple fibers such as thermoplastic resin fibres Fibrous layer and the fibrous layer being made of the staple fibers such as thermoplastic resin fibre and cotton stacking non-woven fabrics in, due to staple fiber Difference (for example, hydrophobicity and hydrophily etc.), the difference of physical property (for example, difference of rigidity etc.) with the chemical property of cotton Deng and cause twining between staple fiber and cotton network be weaker, and staple fiber and cotton are easy to dissociate, therefore, by such stacking non-woven fabrics In the case where arriving absorbent commodity etc. along with product as construction variation (deformation), since the construction of product changes (deformation), staple fiber and cotton are possible to dissociate in the fibrous layer containing cotton, induce the fibrous layer division (decomposition), with it is adjacent Fibrous layer between splitting, so as to cause stacking non-woven fabrics strength reduction.Especially, in above-mentioned stacking non-woven fabrics In the case where being used in absorbent commodity, if generating division (decomposition), splitting in the fibrous layer for constituting stacking non-woven fabrics, It fluffs, or is difficult to fully obtain the liquid metastatic of the body fluid such as the urine for being fed into absorbent commodity, menses.

In addition, the rigidity of the fiber of cotton is relatively high, and therefore, if the quantitative change of cotton contained in fibrous layer is more, fibrous layer Flexibility just reduce, it is possible to damage the stacking resiliency of non-woven fabrics containing the fibrous layer, skin sense of touch, relative to body The tracing ability etc. of shape.

Therefore, the present application is related to including the fibrous layer being made of thermoplastic resin fibre and by thermoplastic resin fibre The absorbent commodity non-woven fabrics of the fibrous layer constituted with cotton is, and it is an object of the present invention to provide a kind of intensity and flexibility are excellent, and needle To the liquid permeability of the body fluid such as urine, menses also excellent absorbent commodity non-woven fabrics.

The solution to the problem

The absorbent commodity of a form (form 1) of the invention is the absorption being made of at least two fibre layers with non-woven fabrics Property article non-woven fabrics, which includes: the 1st fibrous layer, contains cotton and thermoplastic resin fibre；And the 2 fibrous layers, it is adjacent at least single side of the 1st fibrous layer, containing thermoplastic resin fibre and do not contain cotton, wherein institute The thermoplastic resin fibre contained by the 1st fibrous layer is stated with the thermoplastic resin contained by than the 2nd fibrous layer The thin fibre diameter of the fibre diameter of rouge fiber, the non-woven fabrics include the 1st face, by other than the 1st fibrous layer Fibrous layer is formed；And the 2nd face, it is formed by the 1st fibrous layer, positioned at the side opposite with the 1st face, the nonwoven Cloth includes multiple protrusions, is extended on the 1st face of the non-woven fabrics along the 1st direction and along with the described 1st Interval setting of the 2nd orthogonal direction of direction to have predefined, the direction towards the 1st face are prominent；And multiple groove portions, It is extended along the 1st direction, and is set between the adjacent protrusion on the 2nd direction, towards the described 2nd The direction in face is recessed, and the groove portion includes the 1st recess portion, has and is located at than the 1st surface side in the top of the protrusion 1st bottom of the position by the position of the 2nd surface side；The multiple second recesses, along the described 1st in the 1st recess portion Direction is discontinuously arranged, and is recessed from the 1st bottom towards the direction in the 2nd face, and the second recesses have: peripheral wall portion, It is extended from the 1st bottom to the direction of the 2nd surface side；And the 2nd bottom, described in the peripheral wall portion The end of 2nd surface side is arranged in a manner of blocking the end, has highest fibre density in the non-woven fabrics.

According to the absorbent commodity non-woven fabrics of the form 1, thermoplastic resin fibre contained by the 1st fibrous layer have than The thin fibre diameter of the fibre diameter of thermoplastic resin fibre contained by 2nd fibrous layer, therefore, contained by the 1st fibrous layer The thinner thermoplastic resin fibre of fibre diameter be easy to contained by the 1st fibrous layer cotton, contained by the 2nd fibrous layer Thermoplastic resin fibre twine network, it is difficult to generate the division of fibrous layer as described above, the splitting of each fiber interlayer, because This can also play the intensity excellent as non-woven fabrics even if non-woven fabrics contains cotton as constituent.

In addition, the absorbent commodity of form 1 is the construction with above-mentioned specific protrusion and groove portion with non-woven fabrics, that is, institute It states groove portion and includes the 1st recess portion, have and be located at the position than the 1st surface side in the top of the protrusion by the 2nd face 1st bottom of the position of side；And second recesses, the second recesses have: peripheral wall portion, to the described 2nd from the 1st bottom The direction of surface side is extended；And the 2nd bottom, the 2nd surface side of the peripheral wall portion end to block the end Mode be arranged, have the non-woven fabrics in highest fibre density, therefore, fibre density is compared with the 1st recess portion in the protrusion It is lower, in addition, can be applied by the 1st recess portion to the 2nd surface side flexure buffering from the 1st surface side of the non-woven fabrics Thickness direction on stress therefore even containing non-woven fabrics of the cotton as constituent, can also ensure that sufficient softness Property.

Moreover, the fibre density for the 2nd bottom being configured between the protrusion is relatively higher, to make the 1st fibre Tie up the thinner thermoplastic resin fibre of fibre diameter contained by layer and the cotton contained by the 1st fibrous layer, the 2nd fiber Thermoplastic resin fibre contained by layer more closely twines network, therefore, in the 2nd bottom, can more be difficult to generate it is above-mentioned that The division of the fibrous layer of sample, each fiber interlayer splitting.By being locally provided with multiple such be more difficult in non-woven fabrics The part (that is, the 2nd bottom) of the division of fibrous layer, the splitting of each fiber interlayer is generated, even thus local real estate The division of fibrous layer as described above, each fiber interlayer splitting, do not generated in the 2nd bottom yet fibrous layer point It splits, the splitting of each fiber interlayer, non-woven fabrics strength reduction on the whole can be effectively prevented.

Also, the absorbent commodity of form 1 non-woven fabrics has in a thickness direction from relatively low convex of fibre density To the 2nd bottom of the highest second recesses of fibre density, there are the constructions of density gradient in portion, therefore, from the 1st face of the non-woven fabrics The body fluid such as urine, the menses that side supply comes are easy to introduce via the 2nd bottom to the 2nd surface side from the protrusion of the 1st surface side of non-woven fabrics, energy It is enough to play the absorbability (especially, infiltration rate, liquid metastatic etc.) excellent as absorbent commodity non-woven fabrics.

The absorbent commodity of another form (form 2) the of the invention absorbability object that non-woven fabrics is according to the form 1 Product non-woven fabrics, wherein the peripheral wall portion has along the 1st peripheral wall portion of a pair in the 1st direction and along the 2nd direction The 2nd peripheral wall portion of a pair, be equipped at least one of the pair of 1st peripheral wall portion and lead to the hole portion in the 2nd face.

According to the absorbent commodity non-woven fabrics of the form 2, can make to be formed using the hole portion of the 1st peripheral wall portion adjacent Protrusion fiber tension release, therefore, make the entirety of protrusion or formed protrusion the mobile freedom degree of fiber improve and The flexibility of the protrusion can be made more to improve.

The absorbent commodity of another form (form 3) the of the invention absorbability that non-woven fabrics is according to the form 1 or 2 Article non-woven fabrics, wherein the 1st face of the non-woven fabrics is formed by the fibrous layer other than the 1st fibrous layer.

According to the absorbent commodity non-woven fabrics of the form 3, the skin abutment face as wearer of absorbent commodity 1st face of non-woven fabrics is formed by the fibrous layer other than the 1st fibrous layer containing cotton, therefore, can be prevented as caused by cotton Deterioration, reduction of flexibility of skin sense of touch etc. are able to maintain the skin sense of touch and flexibility excellent as non-woven fabrics.

The absorbent commodity of another form (form 4) of the invention with non-woven fabrics is absorbed according to any of form 1~3 Property article non-woven fabrics, wherein the spacing on the 2nd direction of the second recesses is 1.5mm or less.

According to the absorbent commodity non-woven fabrics of the form 4, the spacing on the 2nd direction of the second recesses is 1.5mm hereinafter, therefore, the cotton in the 1st fibrous layer is easy to be held in the 2nd bottom of the second recesses, can this 2 bottoms are more difficult to generate the splitting of the division of fibrous layer as described above, each fiber interlayer.Thus, it is possible to obtain strong Degree and the especially excellent non-woven fabrics of liquid permeability.

The absorbent commodity of another form (form 5) of the invention with non-woven fabrics is absorbed according to any of form 1~4 Property article non-woven fabrics, wherein the non-woven fabrics includes: the 1st fibrous layer, forms the 2nd face；2nd fiber Layer is adjacent with the face of the 1st surface side of the 1st fibrous layer；And the 3rd fibrous layer, with the 1st surface side of the 2nd fibrous layer Face is adjacent, containing thermoplastic resin fibre and does not contain cotton, and the grammes per square metre of the thermoplastic resin fibre of each fibrous layer is identical, and described the Thermoplastic resin fibre contained by 3 fibrous layers has the fiber with the thermoplastic resin fibre contained by the 2nd fibrous layer Diameter is identical or fibre diameter more than it.

In general, the fibrous layer containing cotton when the shredding for carrying out cotton raw material, is easy to the most cotton block of the non-shredding of remaining, Such cotton block, which becomes, twines the reason of network is burst forth between the fiber of surrounding, as a result, being possible to cause the intensity of fibrous layer It reduces.However, constituting non-woven fabrics as follows according to the absorbent commodity non-woven fabrics of above-mentioned form 5: the heat of each fibrous layer The grammes per square metre of plastic resin fiber is identical, and the 2nd fibrous layer and thermoplastic resin fibre's tool contained by the 3rd fibrous layer There is the fibre diameter bigger than the fibre diameter of the thermoplastic resin fibre contained by the 1st fibrous layer, therefore, for described 1 fibrous layer, the fibre weight (number of fiber) of the thermoplastic resin fibre contained by the 1st fibrous layer than the 2nd fibrous layer and The fibre weight (number of fiber) of thermoplastic resin fibre contained by 3rd fibrous layer is more, can make the described 1st containing cotton The intensity of fibrous layer improves.In addition, the absorbent commodity of form 5 with non-woven fabrics have in a thickness direction exist from the 1st face to Fibre weight gradients as (that is, from the 3rd fibrous layer to the 1st fibrous layer) fibre weight (number of fiber) change in 2nd face is more (alternatively, from 1st face to the 2nd face (from the 3rd fibrous layer to the 1st fibrous layer) fibre density increases such fibre density gradient) construction, because This, is supplied to the body fluid such as the urine menses in the face of the 1st surface side of the non-woven fabrics and is easy to from the 1st surface side of the non-woven fabrics to the 2nd Surface side introduces, and as absorbent commodity non-woven fabrics, can play more excellent absorbability (especially, infiltration rate, liquid Metastatic etc.).

The effect of invention

It is to include by thermoplastic resin fibre's structure in accordance with the invention it is possible to provide a kind of absorbent commodity non-woven fabrics At fibrous layer and the fibrous layer being made of thermoplastic resin fibre and cotton absorbent commodity non-woven fabrics, intensity and softness Property it is excellent also, also excellent for the liquid permeability of the body fluid such as urine, menses.

Detailed description of the invention

Fig. 1 is the perspective view of the absorbent commodity non-woven fabrics of one embodiment of the present invention.

Fig. 2 is the top view of the absorbent commodity non-woven fabrics of one embodiment of the present invention.

Fig. 3 is the absorbent commodity non-woven fabrics of one embodiment of the present invention along III-III ' line shown in Fig. 2 Section enlarged cross-sectional view.

(a) of Fig. 4 is the absorbent commodity non-woven fabrics of one embodiment of the present invention along IV-IV ' shown in Fig. 2 The enlarged cross-sectional view in the section of line, (b) of Fig. 4 are the main portions in the section of absorbent commodity non-woven fabrics shown in Fig. 4 (a) Divide enlarged diagram.

Fig. 5 is the schematic diagram for an example for illustrating the manufacturing device of absorbent commodity non-woven fabrics of the invention.

Fig. 6 is the size enlargement apparatus for schematically showing the manufacturing device of absorbent commodity non-woven fabrics of the invention and having A pair of of figuration roller major part amplification stereogram.

Fig. 7 is the major part amplification for indicating the configuration of pin of the lower side figuration roller in a pair of of figuration roller shown in fig. 6 Schematic diagram.

Fig. 8 is the meshing state for indicating upper side figuration roller and lower side figuration roller in a pair of of figuration roller shown in fig. 6 Major part enlarged diagram.

Specific embodiment

Hereinafter, the preferred embodiment of absorbent commodity non-woven fabrics of the invention is described in detail with reference to accompanying drawings.

Fig. 1~4 are the figures for schematically showing the absorbent commodity non-woven fabrics 1 of one embodiment of the present invention.In addition, It in the present specification, will be from upper surface side along thickness direction D as long as no special declaration_TObserve the nothing for the state being unfolded Woven fabric referred to as " is overlooked ".

As shown in figures 1-4, the absorbent commodity of first embodiment of the invention uses non-woven fabrics 1 to have as the 1st face The lower surface 1b of upper surface 1a and the 2nd face as the side opposite with upper surface 1a, are made of two fibre layers stack, should Two fibre layers stack includes: the 1st fibrous layer 2, is the fibrous layer to form the lower surface 1b, contains cotton 2a and thermoplastic resin Rouge fiber 2b；And the 2nd fibrous layer 3, it is adjacent with the face of the upper surface side 1a of the 1st fibrous layer 2, it is to form the upper table The fibrous layer of face 1a containing thermoplastic resin fibre 3a and does not contain cotton, moreover, the non-woven fabrics 1 is with aftermentioned specific Sag and swell, that is, multiple protrusions 4 are included, along the 1st direction D on the upper surface 1a₁Be extended, and along with institute State the 1st direction D₁The 2nd orthogonal direction D₂It is prominent towards the direction of the upper surface 1a with the interval setting predefined；With And multiple groove portions 5, along the 1st direction D₁It is extended, and in the 2nd direction D₂It is upper to be set to the adjacent protrusion 4 Between, it is recessed towards the direction of the lower surface 1b, the groove portion 5 includes the 1st recess portion 51, has and is located at than the protrusion 4 Top 41 in the 1st face side 1a position by the 2nd face side 1b position the 1st bottom 51a；And multiple 2 Recess portion 52, along the 1st direction D in the 1st recess portion 51₁Discontinuously it is arranged, from the 1st bottom 51a direction The direction of the 2nd face 1b is recessed, moreover, the second recesses 52 have specific sag and swell, the specific sag and swell tool Standby: peripheral wall portion 52a is extended from the 1st bottom 51a to the direction of the 2nd face side 1b；And the 2nd bottom 52b, It is arranged in a manner of blocking the end in the end of the 2nd face side 1b of the peripheral wall portion 52a, has the non-woven fabrics 1 In highest fibre density.

Absorbent commodity of the invention is not particularly limited with the absorbent commodity that non-woven fabrics is applicable in, and can be enumerated Such as the various absorbent commodities such as disposable diaper, sanitary napkin, panty liner of banding pattern or pants type.Suction of the invention The property received article can also act as the sheet material in the face of the outward side of the tergite such as being pasted on disposable diaper with non-woven fabrics, especially It is that can properly be used as surface patch, the leakage preventing walls of absorbent commodities such as disposable diaper, sanitary napkin etc. to exist and wear Person skin contact a possibility that sheet material.

In addition, absorbent commodity non-woven fabrics of the invention be suitable for absorbent commodity surface patch when, out From the aspect of skin sense of touch, flexibility, the 1st face for being preferably provided with protrusion is arranged in a manner of the skin in face of wearer.

The fibrous layer stack for constituting the absorbent commodity non-woven fabrics 1 of one embodiment of the present invention is folded by two fibre layers Body is constituted, which includes: the 1st fibrous layer 2, contains cotton 2a and thermoplastic resin fibre 2b；And the 2nd is fine Layer 3 is tieed up, it is adjacent with the face of the upper surface side 1a of the 1st fibrous layer 2, it is the fibrous layer to form the upper surface 1a, contains Thermoplastic resin fibre 3a and cotton is not contained, but in the present invention, the fibrous layer stack is not limited to above-mentioned two layers of fiber Laminated body is also possible to the fibre lay-up being made of 3 layers or more of the fibrous layer containing the 1st fibrous layer and the 2nd fibrous layer Body.

In the present invention, the cotton contained by the 1st fibrous layer is not particularly limited, for example, being able to use fiber number is In the range of 1.0dtex~15dtex, fibre length be cotton in the range of 5mm~40mm etc..Wherein, it is for fibre length The cotton of 20mm or more, when the 1st fibrous layer and aftermentioned 2nd fiber layer stackup are got up (that is, form fibrous layer stack it Border), a part of cotton fiber easily enters in the 2nd fibrous layer, and the liquid permeability of non-woven fabrics can be made to improve, therefore, can Properly use.In addition, being that 10mm cotton below mixes by fibre length for the cotton that is 20mm or more, fibre length Cotton is mixed, can be that the cotton of 20mm or more improves the liquid permeability of non-woven fabrics, and fiber can be utilized long using fibre length Degree is that 10mm cotton below increases the volume of non-woven fabrics, therefore, can particularly preferably be used.

The content of cotton in 1st fibrous layer is not particularly limited, but for the side of water imbibition, water-retaining property, flexibility etc. Face considers, in the range of e.g. 1 mass of mass %~70 %, in the range of preferably 2 mass of mass %~30 %.

In the present invention, as long as the thermoplastic resin fibre contained by the 1st fibrous layer is made of thermoplastic resin Fiber, be just not particularly limited, as the thermoplastic resin, can enumerate, for example, polyethylene (PE), polypropylene (PP), second The olefin-based resins such as alkene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), polylactic acid (PLA) etc. Resin well known to polyamide resins such as polyester based resin, 6- nylon etc., both can be used alone these resins, can also be simultaneously Use two or more resins.

In addition, the construction for the fiber that such thermoplastic resin is constituted is not particularly limited, can enumerate, for example, core The composite fibres such as sheath fiber type, bilateral fibre, island/sea fiber；The fiber of hollow type；Flat, Y-shaped, C font etc. are different Tee section fiber type；The potential three-dimensional crinkled fibre crispaturaed or apparently crispaturaed；Since the physics of water flow, heat, embossing processing etc. is negative Lotus and the segmentation fiber etc. divided both can be used alone the fiber with these constructions, can also be simultaneously using two or more Fiber.

The fiber number (fibre diameter) of the thermoplastic resin fibre is as long as thermoplasticity contained by than aftermentioned 2nd fibrous layer The fibre diameter of resin fibre is thin, is not just not particularly limited, for the intensity of non-woven fabrics, flexibility, skin sense of touch, transparent liquid Property etc. consider, be generally in the range of 1.1dtex~8.8dtex, be preferably in the range of 1.5dtex~4.6dtex It is interior.

In addition, the fibre length of the thermoplastic resin fibre is not particularly limited, but for the intensity of non-woven fabrics, soft Soft, liquid permeability etc. considers, in the range of usually 20mm~100mm, in the range of preferably 35mm~65mm.It is described Thermoplastic resin fibre can also be carried out hydrophilicity-imparting treatment, as such hydrophilicity-imparting treatment, can enumerate and for example be utilized The processing of surfactant, hydrophilic agent etc. is (for example, surfactant is to the mixing of fibrous inside, surfactant to fiber table The coating etc. in face) etc..

The content of thermoplastic resin fibre in 1st fibrous layer is not particularly limited, for the intensity of non-woven fabrics, softness Property etc. consider, in the range of e.g. 30 mass of mass %~99 %, the preferably range of 70 mass of mass %~98 % It is interior.

In addition, in a range that does not hinder the effect of the present invention, the 1st fibrous layer can also contain the cotton and thermoplastic Fiber, arbitrary additive etc. other than property fiber.

Then, the 2nd fibrous layer for constituting absorbent commodity non-woven fabrics of the invention is illustrated.Described 2nd Thermoplastic resin fibre contained by fibrous layer is in addition to having the fibre than the thermoplastic resin fibre contained by the 1st fibrous layer It ties up other than the thick fibre diameter of diameter, is not particularly limited, is able to use arbitrary thermoplastic resin fibre, but for fiber Mutual difficulty for twining network etc. considers, other than fibre diameter (fiber number), it is preferable to use with the 1st fibrous layer institute The same fiber of the thermoplastic resin fibre contained is (that is, same as the thermoplastic resin fibre contained by with the 1st fibrous layer Material (resin) constitute, with same fibre length fiber).

In addition, the 2nd fibrous layer in a range that does not hinder the effect of the present invention can also be fine containing the thermoplasticity Fiber, arbitrary additive other than dimension etc..

In the present invention, the thermoplastic resin fibre contained by the 1st fibrous layer has than contained by the 2nd fibrous layer The thin fibre diameter of the fibre diameter of some thermoplastic resin fibres, therefore, the fibre diameter contained by the 1st fibrous layer are thin Thermoplastic resin fibre be easy to and the cotton contained by the 1st fibrous layer, the thermoplastic resin contained by the 2nd fibrous layer Fiber twines network, it is difficult to the division of fibrous layer as described above, the splitting of each fiber interlayer is generated, therefore, even if non-woven fabrics It is the non-woven fabrics for containing cotton as constituent, is also able to maintain the intensity excellent as non-woven fabrics.

In the present invention, the fibrous layer stack for constituting absorbent commodity non-woven fabrics is not limited to above-mentioned embodiment Two-layer laminate body, can also as expected absorbability, flexibility etc. but the stacking that is made of 3 layers or more of fibrous layer Body.In addition, the number of plies of absorbent commodity of the invention with non-woven fabrics regardless of fibrous layer stack, the of the preferably described non-woven fabrics 1 face is formed by the fibrous layer other than the 1st fibrous layer containing cotton.If the skin abutment face as wearer of absorbent commodity 1st face is formed by the fibrous layer other than the 1st fibrous layer containing cotton, then can prevent the evil of the skin sense of touch as caused by cotton Change, reduction of flexibility etc. are able to maintain the skin sense of touch and flexibility excellent as non-woven fabrics.

In addition, in absorbent commodity non-woven fabrics of the invention, other than the 1st fibrous layer and the 2nd fibrous layer Other fibrous layers be not particularly limited, such as can enumerate by regenerated fibers such as the natural fibers such as wool, artificial silk, inorganic The fibrous layer of the compositions such as the synthetic resin fibers such as fiber, thermoplastic resin fibre.In addition, other fibrous layers can also not hinder Contain arbitrary additive etc. in the range of effect of the invention.

In the present invention, the grammes per square metre for constituting each fibrous layer of absorbent commodity non-woven fabrics is not particularly limited, but is gone out Consider in intensity, flexibility, absorbability of non-woven fabrics etc., is respectively at such as 1g/m²~60g/m²In the range of, preferably It is 10g/m²~30g/m²In the range of.Grammes per square metre as absorbent commodity non-woven fabrics is not particularly limited, but is usually 10g/m²~100g/m²In the range of, preferably 15g/m²~75g/m²In the range of, it is further preferred that 20g/m²~50g/m² In the range of.

In addition, the thickness of absorbent commodity of the invention non-woven fabrics is not particularly limited, usually 0.1mm~5mm In the range of, in the range of preferably 0.5mm~3mm, it is further preferred that in the range of 0.8mm~2mm.

In the absorbent commodity non-woven fabrics of another embodiment of the present invention, the non-woven fabrics includes: the described 1st fine Layer is tieed up, the 2nd face of the non-woven fabrics is formed；2nd fibrous layer is adjacent with the face of the 1st surface side of the 1st fibrous layer；With And the 3rd fibrous layer, it is adjacent with the face of the 1st surface side of the 2nd fibrous layer, containing thermoplastic resin fibre and cotton is not contained, respectively The grammes per square metre of the thermoplastic resin fibre of fibrous layer is identical, and the thermoplastic resin fibre contained by the 3rd fibrous layer has and institute State the thermoplastic resin fibre contained by the 2nd fibrous layer fibre diameter is identical or the fibre diameter more than fibre diameter it is (fine Degree).

Thermoplastic resin fibre's contained by the 1st fibrous layer of the absorbent commodity non-woven fabrics of the embodiment Fibre weight of the fibre weight (number of fiber) than the thermoplastic resin fibre contained by the 2nd fibrous layer and the 3rd fibrous layer (number of fiber) is more, therefore, the intensity of the 1st fibrous layer containing cotton can be made more to improve.In addition, such non-woven fabrics has There is the 1st face to the 2nd face (that is, from the 3rd fibrous layer to the 1st fibrous layer) fibre weight from the non-woven fabrics in a thickness direction (number of fiber) becomes more such fibre weight gradients (alternatively, from the 1st face to the 2nd face (from the 3rd fibrous layer to the 1st fiber Layer) fibre density increases such fibre density gradient) construction be therefore supplied to the face of the 1st surface side of the non-woven fabrics The body fluid such as urine, menses are easy to introduce from the 1st surface side of the non-woven fabrics to the 2nd surface side, can play and use as absorbent commodity The more excellent absorbability of non-woven fabrics (especially infiltration rate, liquid metastatic etc.).

Then, to before constituting absorbent commodity non-woven fabrics of the invention, concave-convex figuration processing (formed sag and swell it Before) the manufacturing method of fibrous layer stack be illustrated.

In the present invention, the means for manufacturing the fibrous layer stack are not particularly limited, and the following methods can be enumerated: making Be used to form above-mentioned each fibrous layer fiber (that is, be used to form the 1st fibrous layer cotton and thermoplastic resin fibre, for shape At the thermoplastic resin fibre etc. of the 2nd fibrous layer) it is respectively formed mesh (pile mesh corresponding with each fibrous layer (fleece)) fiber in each mesh between mesh is combined physically or chemically each other.

Specifically, two layers of fiber including the 1st fibrous layer and the 2nd fibrous layer can be manufactured according to sequence below Laminated body.

(1) prepare manufacturing device, which has: conveying device conveys flat member to a direction；1st Grade carding apparatus, is configured at the upstream side of conveying direction above the conveying device；2nd grade of carding apparatus, described The downstream side (that is, than the 1st grade carding apparatus downstream) of conveying direction is configured above conveying device；And hot wind mode Heating device, be configured at the downstream side of the 2nd grade of carding apparatus.

(2) supply of the 1st grade of carding apparatus of Xiang Suoshu is used to form the thermoplastic resin fibre of the 2nd fibrous layer, using described The pin of rotating roller in carding apparatus carries out fibrillation, the shape on the conveyor surface of the conveying device to the thermoplastic resin fibre At mesh corresponding with the 2nd fibrous layer.

(3) by the mesh corresponding with the 2nd fibrous layer formed on the conveyor surface of the conveying device to defeated It send the downstream side in direction to convey, while being used to form cotton and the thermoplastic resin of the 1st fibrous layer to the 2nd grade of carding apparatus supply Rouge fiber carries out fibrillation to each fiber using the pin of the rotating roller in the carding apparatus, and in conveying with it is the described 2nd fine It ties up and forms mesh corresponding with the 1st fibrous layer in the corresponding mesh of layer.

(4) mesh layer corresponding with the 1st fibrous layer is laminated to mesh corresponding with the 2nd fibrous layer Stacking mesh made of upper is conveyed to the heating device of the hot wind mode, in the heating device, make in each mesh and Fiber between mesh is interlaced with one another, and arbitrarily makes thermoplastic resin fibre thermal welding each other, and fix cotton welding In the surface of thermoplastic resin fibre, so as to two layers for manufacturing that the 1st fibrous layer and the 2nd fibrous layer are laminated Fibrous layer stack.

In addition, being able to use in the case where the fibrous layer stack that manufacture is made of 3 layers or more of fibrous layer configured with 3 Grade or more the manufacturing device of carding apparatus manufacture in the same manner as said sequence.

The forming method of mesh corresponding with each fibrous layer is not limited to above-mentioned method, such as can also use Damp process etc..In addition, the combination method of mesh is not limited to above-mentioned method, for example, can also using water flow intertexture method, Needle point method etc..

For the fibrous layer stack caused by so make, it is endowed by aftermentioned concave-convex figuration processing above-mentioned specific Sag and swell, obtain absorbent commodity non-woven fabrics of the invention.

Then, illustrate the sag and swell of absorbent commodity non-woven fabrics of the invention in further detail referring to attached drawing.

As shown in figures 1-4, the absorbent commodity of one embodiment of the present invention is become with non-woven fabrics 1 constitutes the of protrusion 4 The knot for the shape that the direction of the 2 face side 1b region bends Cheng Cong towards the 1st face side 1a in the region and the 2nd face 1b of 1 face 1a is protruded Structure.On the other hand, the 1st recess portion 51 of groove portion 5 becomes the region in the region and the 2nd face 1b that constitute the 1st face 1a of the 1st recess portion 51 Bend to the structure for the shape that the direction from the 1st face side 1a towards the 2nd face side 1b is protruded.Thus, the non-woven fabrics 1 becomes bumps In the 1st direction D for being equipped with the protrusion 4 with extension₁The 2nd orthogonal direction D₂On section substantially waveform alternately repeatedly piece Shape.

1st direction D of the protrusion 4 towards the face (piece surface) of the non-woven fabrics 1₁(for example, the length side of non-woven fabrics To) be extended, and along the 1st direction D in the face with the non-woven fabrics 1₁The 2nd orthogonal direction D₂(for example, nonwoven The width direction of cloth) multiple row is equipped with the interval predefined.In the present embodiment, each protrusion 4 is with the 1st side of direction To D₁Mode that is continuous and being parallel to each other with other protrusions 4 is extended.

In absorbent commodity non-woven fabrics of the invention, the interval preferably between protrusion and adjacent another protrusion is 0.25mm~5mm is further preferred that 0.5mm~3mm, more preferably 0.75mm~2mm.Here, " between adjacent protrusion Interval " refers to the 2nd direction D in each protrusion₂On the distance between substantial middle position (top of substantive upper convex portion).

If the distance at the interval between adjacent protrusion is less than 0.25mm, the sag and swell of non-woven fabrics is excessively fine, nothing Contact area between the protrusion of woven fabric and the skin of wearer is simultaneously less reduced, and accordingly, there exist the surfaces the (the 1st of non-woven fabrics Face) skin sense of touch reduce a possibility that, and if the distance at the interval between adjacent protrusion is more than 5mm, with concave-convex figuration The difference structurally between non-woven fabrics (that is, fibrous layer stack) before processing tails off, and has applied flexibly concave-convex structure accordingly, it is difficult to obtain The soft skin sense of touch made.

In addition, in absorbent commodity non-woven fabrics of the invention, for protrusion, from the 1st bottom of the 1st recess portion Length (that is, height of protrusion) until the height to the height at the top of protrusion of 1st surface side is preferably 0.25mm~5mm, into One step is preferably 0.5mm~3mm, more preferably 0.75mm~2mm.If the height of the protrusion is less than 0.25mm, protrusion is dashed forward It is too small out, accordingly, it is difficult to obtain the soft skin sense of touch for having applied flexibly sag and swell, and if the height of protrusion is more than 5mm, it is convex The protrusion in portion is excessive and becomes sharp construction, accordingly, it is difficult to obtain soft skin sense of touch.

As shown in figures 1-4, for the absorbent commodity of one embodiment of the present invention non-woven fabrics 1,2 direction Yu D₂In space between upper adjacent protrusion 4,4, groove portion 5 is along the 1st direction D₁The mode of extension is arranged, and the groove portion 5 has Have: the 1st recess portion 51 has and is located at the position than the 1st face 1a in the top 41 of protrusion 4 by the position in the direction of the 2nd face 1b The 1st bottom 51a；And multiple second recesses 52, along the 1st direction D in the 1st recess portion 51₁Discontinuously set It sets, is recessed from the 1st bottom 51a towards the direction of the 2nd face 1b.

Absorbent commodity non-woven fabrics of the invention has such construction with specific protrusion and groove portion, that is, tool Standby following construction: the groove portion has the 1st recess portion and second recesses, and the 1st recess portion, which has, to be located in the top than the protrusion By the 1st bottom of the position of the 2nd surface side, which has peripheral wall portion and the 2nd bottom for the position of 1st surface side, the peripheral wall portion from 1st bottom is risen to the direction of the 2nd surface side and is extended, and the 2nd bottom is in the 2nd surface side of the peripheral wall portion End is arranged in a manner of blocking the end, therefore, can by the 1st recess portion to the 2nd surface side flexure buffering from The stress for the thickness direction that 1st surface side of the non-woven fabrics applies, therefore, even containing nonwoven of the cotton as constituent Cloth can also fully ensure flexibility.

In one embodiment of the present invention, the second recesses 52 have the opening for overlooking shape in the form of a substantially rectangular, whole On it is prominent to the lower surface side 1b of the non-woven fabrics 1 and have the inner space of substantially rectangular parallelepiped.In addition, 52 edge of second recesses Each groove portion 5 length direction (that is, the 1st direction D₁Or the 1st recess portion 51 length direction) be arranged with constant interval, it is described Each second recesses 52 are formed as and the mutually independent state of other second recesses 52.

In addition, in the present embodiment, the multiple second recesses 52 have respectively: the peripheral wall portion 52a of wall shape, With the 1st bottom 51a it is continuous in the state of towards the lower surface side 1b extend；And the 2nd above-mentioned bottom 52b, it is set to the peripheral wall The lower end side of portion 52a.The peripheral wall portion 52a has: the 1st peripheral wall portion 52a of a pair₁、52a₁, along the 1st direction D₁'s Mode extends；And the 2nd peripheral wall portion 52a of a pair₂、52a₂, along the 2nd direction D₂Mode extend, a pair of 1st week Wall portion 52a₁、52a₁It is disposed in mutually opposite position, the 2nd peripheral wall portion 52a of a pair each other₂、52a₂It is also disposed in each other mutually mutually Pair position.

Also, as shown in figures 1 and 3, in the 1st peripheral wall portion 52a of a pair₁、52a₁It is respectively formed with out of the 1st recess portion 51 The hole portion 53 of the 2nd face 1b is led in space in portion.In the present embodiment, hole portion 53 is in the 1st peripheral wall portion 52a of a pair₁、52a₁It is each respectively Equipped with 1, these hole portions 53 are formed in the 1st peripheral wall portion 52a₁Close to the 2nd bottom 52b position (thus, in 1 the 1st recess portion There are two hole portions 53 for 51 presence.).On the other hand, in the 2nd peripheral wall portion 52a of a pair₂、52a₂And there is no the portions for being equivalent to hole portion 53 Position, each 2nd peripheral wall portion 52a₂The state all directly linked up with the 2nd bottom 52b as lower end side.

In absorbent commodity non-woven fabrics of the invention, the settings of second recesses reason for this is that, reduce the slot of groove portion as far as possible Bottom, the chance that more specifically the 1st bottom of the 1st recess portion is contacted with the skin of the wearer of absorbent commodity, also, even if it is false If the skin of the 1st bottom and wearer contact, its contact area is also reduced as far as possible.That is, absorbent commodity of the invention There is the structure for being easy to contact with the skin of wearer according to the sequence of protrusion, the 1st bottom of following 1st recess portion with non-woven fabrics It makes, is easy to contact with the skin of wearer compared to the 1st bottom with the highest protrusion of flexibility in the non-woven fabrics Construction desired in this way, moreover, consideration connects with what the skin of wearer contacted in absorbent commodity non-woven fabrics of the invention The lesser way of contacting surface product is easy to feel flexibility the fact, forms that there is no the 1st by the way that above-mentioned second recesses are arranged The part of recess portion keeps the part contacted with the skin of wearer in the 1st bottom of the 1st recess portion less, as far as possible reduction and flesh The chance and contact area of skin touching.

In addition, in the present invention, in order to be difficult to generate indisposed sense, foreign body sensation caused by contacting with the second recesses, the 2nd Recess portion is set to the 1st bottom of the 1st recess portion, reduces the chance that the second recesses are contacted with the skin of wearer as far as possible.

In the present invention, it is preferred to the depth of second recesses, i.e., from the 1st face (upper surface) side of the 1st bottom of the 1st recess portion Length of the height until the height of the 1st surface side of the 2nd bottom of second recesses is 0.05mm~2mm, is further preferred that 0.075mm~1.5mm, more preferably 0.1mm~1mm.If the depth of the second recesses is less than 0.05mm, after being difficult to ensure The rigidity for the 2nd bottom stated, the intensity of the thickness direction of non-woven fabrics are easy to insufficient.On the other hand, if the depth of the second recesses More than 2mm, then when being bonded with other components (for example, absorber, non-woven fabrics, film etc.) of absorbent commodity, thickness direction Intensity is easy to insufficient, in addition, there is a possibility that generating stiff sense when having compressed.

In addition, the depth for the second recesses and the relationship between the height of the protrusion, the preferably described second recesses Depth (that is, the height of the 1st surface side from the height of the 1st surface side of the 1st bottom of the 1st recess portion to the 2nd bottom of second recesses Length) be the height of the protrusion (that is, the height at the top from the height of the 1st surface side of the 1st bottom of the 1st recess portion to protrusion Length until degree) 10%~80%, be further preferred that 15%~70%, more preferably 20%~60%.If the described 2nd The depth of recess portion is less than the 10% of the height of the protrusion, then ensures the hole in the peripheral wall portion of the second recesses with being unable to fully The formation space in portion, therefore, if hole portion is formed or can not be formed in the form of insufficient, be difficult to obtain as non-woven fabrics and Excellent flexibility.On the contrary, causing hole portion to be formed if the depth of the second recesses is more than the 80% of the height of the protrusion It is too much, therefore, the strength reduction of the peripheral wall portion of the second recesses and be easy to fluff, the skin sense of touch of non-woven fabrics is possible to drop It is low.

In addition, the length in the 1st direction of second recesses is not particularly limited, preferably 0.25mm~5mm is further excellent Choosing is 0.5mm~3mm, more preferably 0.75mm~2mm.If the length in the 1st direction of the second recesses is less than 0.25mm, Cause the second recesses too small, there is obtain the above-mentioned effect played by the second recesses with being unable to fully a possibility that. If the length in the 1st direction of the second recesses is more than 5mm, cause the second recesses too long on the 1st direction, and it is flat Non-woven fabrics, there is no the non-woven fabrics of recess portion to compare, and is difficult in terms of flexibility differential, it is difficult to obtain soft skin sense of touch.

On the other hand, the length in the 2nd direction of second recesses is not particularly limited, but preferably 0.25mm~5mm, into One step is preferably 0.5mm~3mm, more preferably 0.75mm~2mm.If the length on the 2nd direction of the second recesses is less than 0.25mm then causes the second recesses too small, and the formation of especially the 2nd bottom becomes inadequate, and accordingly, there exist be unable to fully Ground obtains a possibility that above-mentioned effect played by the second recesses.If the length in the 2nd direction of the second recesses is more than 5mm, then cause the second recesses excessive, is possible to easily generate indisposed sense, foreign body sensation when contacting with non-woven fabrics.

In addition, the spacing (that is, mutual distance of second recesses adjacent on the 2nd direction) on the 2nd direction of second recesses is simultaneously It is not particularly limited, preferably 1.5mm or less.If the spacing on the 2nd direction of the second recesses be 1.5mm hereinafter, if constitute nothing Cotton in the 1st fibrous layer of woven fabric is easy to be held in the 2nd bottom of the second recesses, therefore, in the 2nd bottom In, it can more be difficult to generate the splitting of the division of fibrous layer as described above, each fiber interlayer.

In the present invention, for the hole portion of the peripheral wall portion formation in the second recesses, the length of the largest portion of the hole portion The size of (in the case where present embodiment, the length in the 1st direction) depending on the second recesses, but preferably 0.25mm~ 5mm is further preferred that 0.5mm~3mm, more preferably 0.75mm~2mm.If the length of the largest portion of the hole portion is less than 0.25mm, then the formation of hole portion is insufficient, ensures the flexibility of the second recesses with being unable to fully, also, is difficult to decrease described The pulling force of fiber at protrusion ensures the flexibility of the protrusion with being unable to fully.If the length of the largest portion of the hole portion More than 5mm, then hole portion just becomes excessive, and the peripheral part of the hole portion is easy to fluff, and is easy to generate when contacting with non-woven fabrics Indisposed sense, foreign body sensation, it is possible to which making the skin sense of touch of non-woven fabrics reduces.

On the other hand, hole portion short transverse (that is, thickness direction of non-woven fabrics) although maximum length depend on it is described The depth of second recesses, but preferably 0.1mm~5mm, are further preferred that 0.25mm~3mm, more preferably 0.5mm~2mm. If the maximum length of the short transverse of the hole portion is less than 0.1mm, the formation of hole portion is insufficient, ensures with being unable to fully described The flexibility of second recesses, also, it is difficult to decrease the pulling force of the fiber at the protrusion, ensure the protrusion with being also unable to fully Flexibility.If the maximum length of the short transverse of the hole portion is more than 5mm, hole portion just becomes excessive, the periphery of the hole portion Portion is easy to fluff, and is easy to generate indisposed sense, foreign body sensation with non-woven fabrics when contacting, it is possible to make the skin sense of touch of non-woven fabrics It reduces.

In the present invention, the hole portion makes the pulling force of the fiber at protrusion discharge and keep protrusion whole or form protrusion The mobile freedom degree of fiber improves, and makes the flexibility, more specifically soft on the thickness direction of the non-woven fabrics at protrusion of protrusion It is soft and soft when having slided skin along the 1st direction (length direction), the 2nd direction (width direction) of non-woven fabrics Soft (flexibility especially in width direction) improves and ensures smooth sense of touch, therefore, only set on the of the second recesses 1 peripheral wall portion.By being formed with hole portion, it is (excellent on the thickness direction of non-woven fabrics that excellent soft or hard sense can be assigned to protrusion Flexibility) and the 2nd direction of non-woven fabrics on excellent fine and smooth sense (in-plane (especially the 2nd direction) of non-woven fabrics it is excellent Both different smoothness), it can be ensured that non-woven fabrics excellent soft or hard sense and fine and smooth sense on the whole, further, it is possible to obtain softness Skin sense of touch.

In addition, in the present invention, in order to ensure the smoothness on the 1st direction of non-woven fabrics, so as to make skin along nothing The 1st direction (that is, direction that protrusion and groove portion are extended) of woven fabric is difficult to be hooked in skin recessed by the described 2nd when having slided The step that portion is formed, does not form hole portion in the 2nd peripheral wall portion of the second recesses.

That is, the 2nd peripheral wall portion and the 1st bottom of the 1st recess portion and the 2nd bottom of the second recesses are continuous, do not have It is integrally formed to seam, therefore, when having slided skin along the 1st direction of non-woven fabrics, skin simultaneously less feels institute The step for stating second recesses is easy to successfully move along protrusion, groove portion.Thereby, it is possible to ensure to have applied flexibly the flexibility of protrusion, Smoothness on 1st direction of the non-woven fabrics of the flexibility of fiber.

Moreover, in the present invention, in order to be away as far as possible the 1st bottom that skin is easy to the protrusion of contact, the 1st recess portion, making The chance that the skin of wearer is contacted with hole portion reduces to the greatest extent, it is difficult to generate indisposed sense, foreign body sensation, hole portion is formed in the described 2nd The position close to the 2nd bottom in 1st peripheral wall portion of recess portion.Thereby, it is possible to more stably ensure to make skin along nonwoven The in-plane of cloth slided when smoothness.

In the absorbent commodity non-woven fabrics of present embodiment, hole portion 53 has and does not make contained by the non-woven fabrics 1 Thermoplastic resin fibre melting but by make the thermoplastic resin fibre be broken and formed peripheral part 53a.It is more specific and Speech, as shown in figure 3, the peripheral part 53a of hole portion 53 includes with logical in the thermoplastic resin fibre contained by the non-woven fabrics 1 Cross fracture and the broken ends 54a in the fracture fiber 54 of the broken ends 54a of formation.

Thus, the peripheral part 53a of hole portion 53 is completely absent the part that thermoplastic resin fibre is hardened due to melting, and It is to be formed by a part of soft thermoplastic resin fibre, or by with passing through fracture shape in thermoplastic resin fibre At broken ends 54a fracture fiber 54 formed.Even if the week of the skin of the wearer of absorbent commodity and hole portion 53 as a result, Edge 53a is contacted, also there is no the thermoplastic resin fibre that is hardened due to melting, feel non-woven fabrics hardness, The case where roughness, is inhibited as far as possible.

Here, fracture fiber 54 is to form the 1st peripheral wall portion 52a₁Thermoplastic resin fibre a part of fiber, have logical It crosses and the thermoplastic resin fibre is alongst stretched or physically cuts off and be broken the broken ends 54a to be formed.

Thus, the end fusing of fiber the case where broken ends 54a is not as melted thermoplastic resin fibre And be rounded, fibre diameter becomes larger, but becomes and be crushed due to fiber and become tapering form or be nearly free from fiber The form of the variation of diameter.Even being produced in the case that the skin of wearer and the peripheral part 53a of hole portion 53 are contacted as a result, It is raw as hardening, indisposed sense caused by the hook of fiber the case where be also suppressed.

Moreover, as shown in figure 3, being provided with a part of fibre in thermoplastic resin fibre in the inner space 53b of hole portion 53 Dimension 55.In addition, the fracture fiber 54 of a part becomes the state that its broken ends 54a extends to the inner space 53b of hole portion 53.

Thus, become and sets up to the fiber 55 of inner space 53b and a part of fiber to extend out in hole portion 53 The state to mix in the 53b of inner space, without becoming complete open space.Become empty in the inside of hole portion if so Between be provided with thermoplastic resin fibre a part structure, even if then assuming is contacted in the skin and hole portion of wearer In the case of, the thermoplastic resin fibre for being set up in inner space can also make the circumferential surface of recess portion, bottom, the sense of touch between hole portion not With minimizing, can enable a wearer to be difficult to generate indisposed sense.That is, being set up in the thermoplastic resin fibre of the inner space of hole portion By the skin of wearer will not pass completely through hole portion reach the 2nd surface side (lower face side) of non-woven fabrics in a manner of function, Therefore, the step in the line of demarcation between the peripheral wall portion or the 2nd bottom and hole portion becomes smaller in sense of touch, as a result, the flesh of non-woven fabrics Skin sense of touch becomes smoother, even can also enable a wearer to be difficult in the case that the skin of wearer and hole portion contact Generate indisposed sense.

In the present invention, it is preferred to which the percent opening of the inner space of the hole portion is 1%~50%, it is further preferred that 1.5%~35%, more preferably 2.5%~20%.If the percent opening of the inner space of the hole portion is less than 1%, percent opening It is too low and can not to the fiber at protrusion, protrusion assign freedom degree, ensure the flexibility of protrusion with being unable to fully.If the hole portion The percent opening of inner space be more than 50%, then the peripheral wall portion equipped with hole portion (is in this case the 1st peripheral wall portion 52a₁) intensity be easy to reduce, also, there are the lines of demarcation of the peripheral part of hole portion a possibility that readily identified in sense of touch.No It crosses, the percent opening of the inner space of hole portion can also be according to type, purposes of the absorbent commodity for using non-woven fabrics etc. Other than above-mentioned range, can arbitrarily it set.

Hereinafter, the absorbent commodity non-woven fabrics 1 with above-mentioned specific sag and swell is described in detail with reference to accompanying drawings Manufacturing method.

Fig. 5~Fig. 8 is an example for indicating the manufacturing device of manufacture absorbent commodity non-woven fabrics 1, and manufacturing device 6 is Fibrous layer stack 7 for will be made of two fibre layers is processed into the use of the absorbent commodity with above-mentioned specific sag and swell The device of non-woven fabrics 1, the two fibre layers include: the 1st fibrous layer 2 comprising cotton 2a and thermoplastic resin fibre 2b；And the 2 fibrous layers 3, it is adjacent with the single side of the 1st fibrous layer 2, containing thermoplastic resin fibre 3a and do not contain cotton.The manufacture Device 6 has: discharge device 61, and the fibrous layer stack 7 before processing is rolled into web-like, and discharge device 61 is by the fibrous layer Stack 7 is released towards conveying direction MD；Preheating device 62, it is real to the fibrous layer stack 7 released by the discharge device 61 Apply preheating；And size enlargement apparatus 63, so that the fibrous layer stack 7 for implementing preheating is extended and is carried out being used to form protrusion and groove portion (including the 1st recess portion and second recesses.) concave-convex figuration processing.

Preheating device 62 has a pair of of heating roller 62a, 62b up and down in present embodiment, can be will be by from the releasing The fibrous layer stack 7 that device 61 releases and conveys the processing object come is wound in the heating roller 62b for the lower section being rotating and carries out After heating, joins to the heating roller 62a for the top being rotating, using the heating roller 62a fibrous layer stack 7 is carried out Heating.

In addition, size enlargement apparatus 63 has a pair of of extension roller 63a, 63b up and down, as shown in fig. 6, the extension roller 63a of top has It is standby: lug, nib 63a₁, it is arranged along roller width direction with constant interval, along the outer peripheral surface phase of the extension roller 63a above this It is mutually equipped with multiple row in parallel；And multiple row groove 63a₂, it is set to two adjacent lug, nib 63a₁、63a₁Between.On the other hand, As shown in Figure 6 and Figure 7, the extension roller 63b of lower section is in outer peripheral surface 63b₂Equipped with the groove 63a of the extension roller 63a with top₂It nibbles Multiple pin 63b that the mode of conjunction is arranged₁.As shown in figure 8, these pins 63b₁With the extension not with top in the width direction of roller The lug, nib 63a of roller 63a₁The mode of contact is arranged with constant interval, also, along outer peripheral surface 63b in the circumferential direction of roller₂With perseverance Fixed interval is arranged in substantially linear.In addition, as shown in fig. 7, the extension roller 63b of the lower section in present embodiment becomes multiple Sell 63b₁It is serrated and is disposed in the outer peripheral surface 63b of the extension roller 63b of lower section₂Structure.

In the case where implementing the manufacture of absorbent commodity non-woven fabrics 1 using thus configured manufacturing device 6, successively It carries out implementing the preheating procedure of preheating to the fibrous layer stack 7 for the processing object released from discharge device 61, make via preheating The fibrous layer stack 7 of process extends and carries out the figuration process of concave-convex figuration processing.

In the preheating procedure, make the processing object released from discharge device 61, come along conveying direction MD conveying Fibrous layer stack 7 and preheating device 62 a pair of of up and down heating roller 62a, 62b for being rotating periphery face contact, thus to institute Fibrous layer stack 7 is stated to be heated and implement to preheat.Preheating temperature in the preheating procedure can be according to composition fibrous layer stack 7 The type of thermoplastic resin fibre is suitably set, but is polyethylene terephthalate in such as thermoplastic resin fibre (PET) and in the case where the composite fibre of the core-sheath-type of high density polyethylene (HDPE) (HDPE), the preferred temperature of the outer peripheral surface of heating roller It is 60 DEG C~120 DEG C or so.

In the figuration process, make to convey the fibrous layer stack 7 come via preheating procedure and insert in size enlargement apparatus 63 Enter between a pair of of up and down extension roller 63a, the 63b being rotating while engagement, makes the fibrous layer stack 7 in the top of engagement Extension roller 63a lug, nib 63a₁With groove 63a₂With the pin 63b of the extension roller 63b of lower section₁Between extend and carry out figuration.This Outside, when implementing figuration process, preferably a pair of extend while roller 63a, 63b are heated into 60 DEG C~120 DEG C on one side by upper and lower and enter Row figuration, to be convenient to carry out figuration.

In the figuration process, the extension roller 63a of top is by lug, nib 63a₁The part contacted with fibrous layer stack 7 is downward The direction indentation of the extension roller 63b of side, protrusion 4 is by figuration as a result,.On the other hand, the circumferentially row of the extension roller 63b of lower section Arrange multiple pin 63b of Cheng Yilie₁It will be with pin 63b₁Tip portion contact the extension roller 63a upwards of fibrous layer stack 7 Corresponding groove 63a₂Interior indentation.At this point, in fibrous layer stack 7, with pin 63b₁Non-contacting state is pulled into groove 63a₂Interior part becomes the 1st recess portion 51 of groove portion 5.In addition, with pin 63b₁The part that contacts of tip portion be strongly pressed into (push-in) groove 63a₂It is interior and by figuration, therefore, be consequently formed have prolong along the direction that protrusion 4 and groove portion 5 are extended The 1st peripheral wall portion 52a stretched₁, along roller width direction extend the 2nd peripheral wall portion 52a₂And the 2nd bottom 52b second recesses 52.

In addition, for the 2nd bottom 52b of second recesses 52, in its formation, extension roller 63a above and lower section are prolonged It stretches in the state that roller 63b bites fibrous layer stack 7, sells 63b₁Tip portion by the abutment portion of fibrous layer stack 7 to recessed Slot 63a₂Interior strength indentation, therefore, substantial fibre density is got higher than the fibre density of the other parts of non-woven fabrics.Match if so The fibre density for being placed in the 2nd bottom 52b between two adjacent protrusions 4 is relatively higher, then constitutes the upper of the non-woven fabrics 1 Contained by the thinner thermoplastic resin fibre 2b of fibre diameter and the 1st fibrous layer 2 contained by the 1st fibrous layer 2 stated Thermoplastic resin fibre 3a contained by cotton 2a, the 2nd fibrous layer 3 more closely twines network, therefore, in the 2nd bottom 52b In, it can more be difficult to the division of fibrous layer as generating the above-mentioned prior art, the splitting of each fiber interlayer.Pass through Non-woven fabrics be locally provided with multiple divisions for being difficult to generate such fibrous layer, each fiber interlayer splitting part (that is, the 2nd bottom), so that even if hypothesis locally produces the interlayer of the division of fibrous layer as described above, each fiber interlayer Removing, does not generate the division of fibrous layer, the splitting of each fiber interlayer in the 2nd bottom yet, can be effectively prevented nothing Woven fabric strength reduction on the whole.

Also, the non-woven fabrics 1 has in thickness direction D_TOn from the relatively low protrusion 4 of fibre density to fibre density There are the constructions of density gradient by 2nd bottom 52b of highest second recesses 52, therefore, from the upper surface 1a (of the non-woven fabrics 1 1 face) the supply body fluid such as urine, menses that come in side are easy to the protrusion 4 from the upper surface side 1a of the non-woven fabrics 1 via the 2nd bottom 52b It is introduced to (the 2nd face) side lower surface 1b, the absorbability excellent as the non-woven fabrics of absorbent commodity can be played (especially, Infiltration rate, liquid metastatic etc.).

Also, in fibrous layer stack 7 with pin 63b₁Tip portion width direction (width direction of roller) two The part of end contact, forms the 1st peripheral wall portion 52a₁Thermoplastic resin fibre in pin 63b₁Effect and lug, nib 63a₁It will be fine Separated under the booster action of the tension generated when the direction indentation of dimension laminated body 7 extensions roller 63b downwards, or be broken and Form the fracture fiber 54 with broken ends 54a.The broken ends comprising fracture fiber 54 are formed in second recesses 52 as a result, The hole portion 53 of 54a.In addition, a part of thermoplastic resin fibre is remained with the state for being set up in the inner space 53b of hole portion 53, separately Outside, the broken ends 54a of a part fracture fiber 54 becomes the state extended in the 53b of inner space.

Here, hole portion 53 is formed in the 1st peripheral wall portion 52a₁, the 1st peripheral wall portion 52a₁Along following direction, the direction is edge The direction of the conveying direction MD of the fibrous layer stack 7 of processing object, that is, the direction of rotation for extending roller 63a, 63b and is The direction being extended along protrusion 4 and groove portion 5.

Above-mentioned protrusion 4 is formed with by the fibre lay-up body that figuration has sag and swell via the figuration process and including The groove portion 5 of 1 recess portion 51 and second recesses 52 is completed as absorbent commodity non-woven fabrics 1.The absorbent commodity with non-woven fabrics 1 it It is used in surface patch, the leakage preventing wall etc. of the absorbent commodities such as disposable diaper, sanitary napkin afterwards.

Hereinafter, the absorbent commodity to another embodiment of the present invention is illustrated with non-woven fabrics.

In another embodiment of the present invention, absorbent commodity is the fibrous layer being made of 3 layers of fibrous layer with non-woven fabrics Stack, fibrous layer stack (non-woven fabrics) include: the 3rd fibrous layer, form the 1st face of non-woven fabrics, contain thermoplastic resin fibre And cotton is not contained；2nd fibrous layer (middle layer), it is adjacent with the face of the 2nd surface side of the 3rd fibrous layer；And the described 1st Fibrous layer, it is adjacent with the face of the 2nd surface side of the 2nd fibrous layer, contain cotton.In thus configured absorbent commodity non-woven fabrics It is described when being used as the surface patch of absorbent commodity in such a way that the 1st face of the non-woven fabrics becomes the skin opposite face of wearer 3rd fibrous layer of 2nd fibrous layer as middle layer between the skin opposite face for forming surface patch and the described 1st containing cotton Between fibrous layer, the 3rd fibrous layer and the 1st fibrous layer are isolated, and are absorbed, the urine of cotton for remaining to the 1st fibrous layer etc. Body fluid is difficult to transmit to the 3rd fibrous layer, and then is difficult to transmit to the skin of wearer, enables a wearer to accordingly, it is difficult to generate It perceives moist state or enables a wearer to feel sultry etc. and enable a wearer to generate the such situation of sense of discomfort.

As the specific structure of 3 layers of fibrous layer stack in another embodiment, enumerate for example following such Structure.

[the 1st face (skin opposite face) side fibrous layer] (the 3rd fibrous layer)

Fiber number 2.8dtex, fibre length 45mm and grammes per square metre 10g/m²PET/PE sheath-core type conjugate fiber [middle layer] ( 2 fibrous layers)

Fiber number 2.8dtex, fibre length 45mm and grammes per square metre 10g/m²PET/PE sheath-core type conjugate fiber [the 2nd face (non-flesh Skin opposite face) side fibrous layer] (the 1st fibrous layer)

Fiber number 2.2dtex, fibre length 44mm and grammes per square metre 8g/m²PET/PE sheath-core type conjugate fiber, fiber number 1.7dtex, fibre length 45mm and grammes per square metre 1g/m²PET/PE sheath-core type conjugate fiber and grammes per square metre 1g/m²Cotton mixing Object

In addition, absorbent commodity is the fibre being made of 3 layers of fibrous layer with non-woven fabrics in another embodiment of the invention Laminated body is tieed up, fibrous layer stack (non-woven fabrics) includes: the 2nd fibrous layer, forms the 1st face of non-woven fabrics；1st fiber Layer (middle layer), it is adjacent with the face of the 2nd surface side of the 2nd fibrous layer, contain cotton；And the 3rd fibrous layer, with the 1st fibre The face for tieing up the 2nd surface side of layer is adjacent, containing thermoplastic resin fibre and does not contain cotton.Thus configured absorbent commodity nonwoven Cloth by the 1st face of the non-woven fabrics become wearer skin opposite face in a manner of be used as absorbent commodity surface patch when, As the 3rd fibrous layer between the 2nd surface side of the 1st fibrous layer containing cotton and the protrusion in the 1st face for being set to the non-woven fabrics Construction between the space part of (non-skin is with respect to surface side) therefore will be due to from the 2nd surface side for being configured to the 3rd fibrous layer The evaporation of body fluid such as urine of absorber release etc. and the moisture that generates is absorbed, is maintained in the cotton of the 1st fibrous layer, and And it can enclose in the space part and the 3rd fibrous layer (in addition, the space part is wet as making to discharge from absorber Gas is functioned with the space that the state of moisture stops, the auxiliary that the 3rd fibrous layer is enclosed as the moisture that will be discharged from absorber Space functions.).As a result, it is possible to the moisture released from absorber is effectively sealing into than the 1st fibrous layer In the region of the 2nd surface side, it can be difficult to enable a wearer to feel sultry etc..

As the specific structure of 3 layers of fibrous layer stack in another embodiment, can enumerate it is for example following that The structure of sample.

[the 1st face (skin opposite face) side fibrous layer] (the 2nd fibrous layer)

Fiber number 2.8dtex, fibre length 45mm and grammes per square metre 10g/m²PET/PE sheath-core type conjugate fiber

[middle layer] (the 1st fibrous layer)

[the 2nd face (non-skin opposite face) side fibrous layer] (the 3rd fibrous layer)

In addition, there is no special by the thermoplastic resin fibre contained by the 3rd fibrous layer in above-mentioned each embodiment It does not limit, it is fine to be able to use thermoplastic resin same as the thermoplastic resin fibre contained by the 1st fibrous layer or the 2nd fibrous layer Dimension.Moreover, in these embodiments, it is preferred that the grammes per square metre of the thermoplastic resin fibre of each fibrous layer is identical, and the described 2nd Thermoplastic resin fibre contained by fibrous layer and the 3rd fibrous layer is respectively provided with the thermoplasticity contained by than the 1st fibrous layer The big fibre diameter (fiber number) of the fibre diameter (fiber number) of resin fibre.If non-woven fabrics (fibrous layer stack) has such knot Structure, then the fibre weight (number of fiber) of the thermoplastic resin fibre contained by the 1st fibrous layer is necessarily than the 2nd fibrous layer It is more with the fibre weight (number of fiber) of the thermoplastic resin fibre contained by the 3rd fibrous layer, therefore, it can make containing cotton The intensity of 1st fibrous layer further increases.In addition, the thermoplastic resin fibre of the 1st fibrous layer of such non-woven fabrics be easy to The thermoplastic resin fibre of 2nd fibrous layer or the 3rd fibrous layer twines network, therefore, even if containing cotton in the fibrous layer for constituting non-woven fabrics In that case of, it is also difficult to generate the splitting of each fiber interlayer.

In addition, one embodiment of the present invention absorbent commodity in non-woven fabrics 1, the hole portion of the second recesses 52 53 are set to along the 1st direction D₁The 1st peripheral wall portion 52a of a pair that is formed of mode₁, but in absorbent commodity nothing of the invention In woven fabric, it is not limited to such form, for example, hole portion can both be set to the 1st peripheral wall portion 52a of a pair₁In a peripheral wall Portion can also be set to along the 2nd direction D₂The 2nd peripheral wall portion of a pair that is formed of mode, or any one week can also be set to Wall portion.

Moreover, above embodiment absorbent commodity in non-woven fabrics 1, hole portion 53 is set to the second recesses 52 The position close to the 2nd bottom 52b in peripheral wall portion 52a, but in absorbent commodity non-woven fabrics of the present invention, it is not limited to this The form of sample, the hole portion can be set to arbitrary position in the range of not damaging the flexibility of non-woven fabrics.

In addition, above embodiment absorbent commodity in non-woven fabrics 1, in the inner space 53b of the hole portion 53 A part of fiber 55 being inside provided in thermoplastic resin fibre, but in absorbent commodity non-woven fabrics of the invention, it sets up Fiber in the inner space of such hole portion can also be not present.In addition, in the present invention, it can also be unlike above-mentioned embodiment party Formula extends the broken ends for being broken fiber into the inner space of hole portion.

Above embodiment absorbent commodity in non-woven fabrics 1, the second recesses 52 are shaped generally as cuboid Shape, but in absorbent commodity non-woven fabrics of the invention, the shape of second recesses is not particularly limited, and can be set as cylinder The arbitrary shape such as shape, prism-shaped.

Moreover, in the above-described embodiment, protrusion 4 along the non-woven fabrics 1 the 1st direction D₁Continuously extend, but In absorbent commodity non-woven fabrics of the invention, protrusion may not can also continuously extend along the 1st direction of non-woven fabrics, separately Outside, it is also possible to discontinuous.But, for second recesses, be preferably disposed to the 1st recess portion is sandwiched in protrusion continuous part Between the 1st bottom, protrusion is easy to first contact with the skin of wearer as a result, and the skin of wearer is difficult to and the second recesses Therefore contact can more be difficult to generate indisposed sense, foreign body sensation caused by contacting with the second recesses.

Absorbent commodity of the invention is not restricted to above-mentioned embodiment etc. with non-woven fabrics, of the invention not departing from In the range of purpose, purport, appropriately combined, change etc. can be carried out.In addition, in the present specification, the ordinal numbers such as " the 1st ", " the 2nd " are used It is distinguished in the item for being labeled with the ordinal number, is not intended to sequence, priority, different degree of each item etc..

Description of symbols

1, absorbent commodity non-woven fabrics；2, the 1st fibrous layer；2a, cotton；2b, thermoplastic resin fibre；3, the 2nd fibrous layer； 3a, thermoplastic resin fibre；4, protrusion；41, top；5, groove portion；51, the 1st recess portion；51a, the 1st bottom；52, second recesses； 52a, peripheral wall portion；52b, the 2nd bottom；53, hole portion；6, manufacturing device；61, discharge device；62, preheating device；63, figuration fills It sets.

Claims

1. a kind of non-woven fabrics of absorbent commodity is the nonwoven for the absorbent commodity being made of at least two fibre layers Cloth, at least two fibre layers include: the 1st fibrous layer for this, contain cotton and thermoplastic resin fibre；And the 2nd fibrous layer, with At least single side of 1st fibrous layer is adjacent, containing thermoplastic resin fibre and does not contain cotton, wherein

The thermoplastic resin fibre contained by 1st fibrous layer has the heat contained by than the 2nd fibrous layer The thin fibre diameter of the fibre diameter of plastic resin fiber,

The non-woven fabrics has the 2nd face in the 1st face and the side opposite with the 1st face, and the non-woven fabrics includes multiple protrusions, It is extended along the 1st direction on the 1st face of the non-woven fabrics and along 2nd side orthogonal with the 1st direction It is arranged to the interval predefined, the direction towards the 1st face is prominent；And multiple groove portions, along the 1st side To be extended, and on the 2nd direction be set to the adjacent protrusion between, towards the 2nd face direction be recessed,

The groove portion includes the 1st recess portion, has and is located at the position than the 1st surface side in the top of the protrusion by institute State the 1st bottom of the position of the 2nd surface side；And multiple second recesses, do not connect in the 1st recess portion along the 1st direction It is arranged continuously, is recessed from the 1st bottom towards the direction in the 2nd face,

The second recesses have: peripheral wall portion, are extended from the 1st bottom to the direction of the 2nd surface side；And 2nd bottom is arranged in a manner of blocking the end in the end of the 2nd surface side of the peripheral wall portion, has the nonwoven Highest fibre density in cloth.

2. non-woven fabrics according to claim 1, wherein

The peripheral wall portion has the 1st peripheral wall portion of a pair along the 1st direction and a pair the 2nd week along the 2nd direction Wall portion is equipped with the hole portion for leading to the 2nd face at least one of the pair of 1st peripheral wall portion.

3. non-woven fabrics according to claim 1 or 2, wherein

1st face of the non-woven fabrics is formed by the fibrous layer other than the 1st fibrous layer.

4. non-woven fabrics according to claim 1 or 2, wherein

Spacing on the 2nd direction of the second recesses is 1.5mm or less.

5. non-woven fabrics according to claim 1 or 2, wherein

The 1st fibrous layer that the non-woven fabrics includes forms the 2nd face, the 2nd fibrous layer that the non-woven fabrics includes It is adjacent with the face of the 1st surface side of the 1st fibrous layer, and the non-woven fabrics includes the 3rd fibrous layer, the 3rd fibrous layer and the 2nd The face of 1st surface side of fibrous layer is adjacent, containing thermoplastic resin fibre and does not contain cotton, the thermoplastic resin fibre of each fibrous layer Grammes per square metre it is identical, thermoplastic resin fibre contained by the 3rd fibrous layer has the thermoplastic contained by with the 2nd fibrous layer The fibre diameter of property resin fibre is identical or fibre diameter more than it.