CN107613924A

CN107613924A - Absorbent commodity non-woven fabrics

Info

Publication number: CN107613924A
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: 2018-01-19
Anticipated expiration: 2035-08-26
Also published as: TWI675138B; CN107613924B; JP6289418B2; TW201700813A; JP2016220987A; WO2016194246A1

Abstract

The present invention relates to the fibrous layer including being made up of thermoplastic resin fibre and the absorbent commodity non-woven fabrics for the fibrous layer being made up of thermoplastic resin fibre and cotton, there is provided a kind of intensity and flexibility is excellent and liquid permeability for the body fluid such as urine, menses also excellent absorbent commodity non-woven fabrics.The absorbent commodity of the present invention is formed with non-woven fabrics (1) by least two fibre layers, and at least two fibre layers include for this：1st fibrous layer (2), it includes cotton (2a) and thermoplastic resin fibre (2b)；And the 2nd fibrous layer (3), it is adjacent with least one 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) possesses the specific construction of multiple convex portions (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 technology

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

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 At least one side of the layer mainly formed in the velveteen by fibre length 5mm is laminated with by the chopped fiber structure such as thermoplastic resin fibre Into layer, chopped fiber each other, velveteen each other and velveteen and chopped fiber mutually dimensionally interweave to carry out integrated form.

Prior art literature

Patent document

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

The content of the invention

Problems to be solved by the invention

However, non-woven fabrics is such as disclosed in Patent Document 1, including being made up of chopped fibers such as thermoplastic resin fibres Fibrous layer and the fibrous layer being made up of the chopped fibers such as thermoplastic resin fibre and cotton stacking non-woven fabrics in, due to chopped 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 chopped fiber and cotton network be weaker, and chopped fiber and cotton are easy to dissociate, therefore, by such stacking non-woven fabrics In the case of to absorbent commodity etc. along with product as construction change (deformation), due to the construction change of product (deformation), chopped 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 be laminated non-woven fabrics intensity decreases.Especially, in above-mentioned stacking non-woven fabrics In the case of being used in absorbent commodity, if producing division (decomposition), splitting in the fibrous layer for forming stacking non-woven fabrics, Fluff, or be difficult to the liquid metastatic for fully obtaining the body fluid such as the urine for being fed into absorbent commodity, menses.

In addition, the ratio of rigidity of the fiber of cotton is higher, 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 Tracing ability of shape etc..

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

The solution used to solve the problem

The absorbent commodity of the form (form 1) of the present invention is the absorption that is made up of at least two fibre layers with non-woven fabrics Property article non-woven fabrics, at least two fibre layers include for this：1st fibrous layer, it contains cotton and thermoplastic resin fibre；And the 2 fibrous layers, it is adjacent with least one side of the 1st fibrous layer, containing thermoplastic resin fibre and does 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 fat fiber, the non-woven fabrics have：1st face, it is by addition to 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 has：Multiple convex portions, it is extended and along with the described 1st on the 1st face of the non-woven fabrics along the 1st direction Interval setting of the 2nd orthogonal direction of direction to have predefined, protruded towards the direction in the 1st face；And multiple groove portions, It is extended along the 1st direction, and is located on the 2nd direction between the adjacent convex portion, towards the described 2nd The direction depression in face, the groove portion have：1st recess, it possesses the 1st surface side described in ratio in the top of the convex portion 1st bottom of the position by the position of the 2nd surface side；The multiple second recesses, it is in the 1st recess along the described 1st Direction is discontinuously set, and is recessed from the 1st bottom towards the direction in the 2nd face, and the second recesses possess：Surrounding wall portion, It is extended from the 1st bottom to the direction of the 2nd surface side；And the 2nd bottom, it is described in the surrounding wall portion The end of 2nd surface side is set 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, the 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 the cotton contained by the 1st fibrous layer, the 2nd fibrous layer contained by Thermoplastic resin fibre twine network, it is difficult to produce the dividing of fibrous layer as described above, the splitting of each fiber interlayer, because This, even if non-woven fabrics contains cotton as constituent, can also play the intensity excellent as non-woven fabrics.

In addition, the absorbent commodity of form 1 is to have the above-mentioned specifically construction of convex portion and groove portion with non-woven fabrics, i.e. institute Stating groove portion has：1st recess, it possesses the position of the 1st surface side described in ratio in the top of the convex portion and leans on the 2nd face 1st bottom of the position of side；And second recesses, the second recesses possess：Surrounding wall portion, it is from the 1st bottom to the described 2nd The direction of surface side is extended；And the 2nd bottom, it is in the end of the 2nd surface side of the surrounding wall portion to block the end Mode set, have the non-woven fabrics in highest fibre density, therefore, fibre density is compared in the convex portion with the 1st recess It is relatively low, apply in addition, can be bent by the 1st recess to the 2nd surface side to buffer 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 of the 2nd bottom between being configured at the convex portion is relatively higher, so that the described 1st is fine The cotton contained by the thinner thermoplastic resin fibre of fibre diameter and the 1st fibrous layer contained by dimension layer, the 2nd fiber Thermoplastic resin fibre contained by layer more closely twines network, therefore, in the 2nd bottom, can more be difficult to produce it is above-mentioned that The dividing of the fibrous layer of sample, the splitting of each fiber interlayer.By being locally provided with multiple such be more difficult in non-woven fabrics The dividing of fibrous layer, the part of the splitting of each fiber interlayer (that is, the 2nd bottom) are produced, even so as to local real estate The dividing of fibrous layer as described above, the splitting of each fiber interlayer, point of fibrous layer is not produced in the 2nd bottom yet Split, the splitting of each fiber interlayer, can effectively prevent non-woven fabrics intensity decreases on the whole.

Also, the absorbent commodity of form 1 non-woven fabrics has in a thickness direction from relatively low convex of fibre density There is the construction of density gradient to the 2nd bottom of fibre density highest second recesses in portion, therefore, from the 1st face of the non-woven fabrics The body fluid such as the next urine of side supply, menses are easy to introduce to the 2nd surface side via the 2nd bottom from the convex portion 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) of the present invention is absorbability thing according to the form 1 with non-woven fabrics Product non-woven fabrics, wherein, the surrounding wall portion has along a pair of the 1st surrounding wall portions in the 1st direction and along the 2nd direction A pair of the 2nd surrounding wall portions, be provided with least one of the pair of 1st surrounding 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 utilize the hole portion of the 1st surrounding wall portion make to be formed it is adjacent Convex portion fiber tension force release, therefore, make convex portion entirety or formed convex portion fiber movement the free degree improve and The flexibility of the convex portion can be made more to improve.

The absorbent commodity of the another form (form 3) of the present invention is absorbability according to the form 1 or 2 with non-woven fabrics Article non-woven fabrics, wherein, the 1st face of the non-woven fabrics is formed by the fibrous layer in addition to 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 in addition to the 1st fibrous layer containing cotton, therefore, it is possible to prevent as caused by cotton The deterioration of skin sense of touch, reduction of flexibility etc., the skin sense of touch and flexibility excellent as non-woven fabrics can be kept.

The absorbent commodity of the another form (form 4) of the present 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 below 1.5mm.

According to the absorbent commodity non-woven fabrics of the form 4, the spacing on the 2nd direction of the second recesses is Below 1.5mm, therefore, the cotton in the 1st fibrous layer are easy to be held in the 2nd bottom of the second recesses, can this 2 bottoms are more difficult to produce the dividing of fibrous layer as described above, the splitting of 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 the another form (form 5) of the present 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：1st fibrous layer, it forms the 2nd face；2nd fiber Layer, it is adjacent with the face of the 1st surface side of the 1st fibrous layer；And the 3rd fibrous layer, itself and 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 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 of cotton raw material is carried out, is easy to the most cotton block of the non-shredding of remaining, Such cotton block turns into twines the reason for network bursts forth between the fiber of surrounding, as a result, being possible to the intensity for causing fibrous layer Reduce.However, according to the absorbent commodity non-woven fabrics of above-mentioned form 5, non-woven fabrics is formed as follows：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 the change of 2nd face (that is, from the 3rd fibrous layer to the 1st fibrous layer) fibre weight (number of fiber) is more (or from 1st face to the 2nd face (from the 3rd fibrous layer to the 1st fibrous layer) fibre density increase as fibre density gradient) construction, because This, is supplied to the body fluid such as the urine menses in 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

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

Brief description of the drawings

Fig. 1 is the stereogram 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 the III-III ' lines shown in Fig. 2 Section amplification view.

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

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

Fig. 6 is the manufacture device possessed size enlargement apparatus for schematically showing the absorbent commodity non-woven fabrics of the present invention A pair of figuration rollers major part amplification stereogram.

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

Fig. 8 is the engagement for representing the upper side figuration roller in a pair of figuration rollers shown in Fig. 6 and lower side figuration roller Major part enlarged diagram.

Embodiment

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

Fig. 1~4 are the figures for the absorbent commodity non-woven fabrics 1 for schematically showing one embodiment of the present invention.In addition, In this manual, will be from upper surface side along thickness direction D as long as no special declaration_TObserve the nothing for the state deployed Cloth is spun referred to as " to overlook ".

As shown in figures 1-4, the absorbent commodity of first embodiment of the invention has by the use of non-woven fabrics 1 is used as the 1st face The upper surface 1a and lower surface 1b in the 2nd face as the side opposite with upper surface 1a, is made up of two fibre layers stack, should Two fibre layers stack includes：1st fibrous layer 2, it is the fibrous layer to form the lower surface 1b, contains cotton 2a and thermoplastic resin Fat fiber 2b；And the 2nd fibrous layer 3, it is adjacent with the face of the upper surface 1a sides of the 1st fibrous layer 2, is to form the upper table Face 1a fibrous layer, containing thermoplastic resin fibre 3a and cotton is not contained, moreover, the non-woven fabrics 1 is with described later specific Sag and swell, i.e. have：Multiple convex portions 4, it is on the upper surface 1a along the 1st direction D₁Be extended, and along with institute State the 1st direction D₁The 2nd orthogonal direction D₂With the interval setting predefined, protruded towards the direction of the upper surface 1a；With And multiple groove portions 5, it is along the 1st direction D₁It is extended, and in the 2nd direction D₂It is upper to be located at the adjacent convex portion 4 Between, it is recessed towards the direction of the lower surface 1b, the groove portion 5 has：1st recess 51, it possesses positioned at than the convex portion 4 Top 41 in the 1st face 1a sides position by the 2nd face 1b sides position the 1st bottom 51a；And multiple 2 Recess 52, it is in the 1st recess 51 along the 1st direction D₁Discontinuously set, from the 1st bottom 51a directions The direction depression of the 2nd face 1b, moreover, the second recesses 52 have specific sag and swell, the specific sag and swell tool It is standby：Surrounding wall portion 52a, it is extended from the 1st bottom 51a to the direction of the 2nd face 1b sides；And the 2nd bottom 52b, It is set in the end of the 2nd face 1b sides of the surrounding wall portion 52a in a manner of blocking the end, has the non-woven fabrics 1 Middle highest fibre density.

The absorbent commodity that the absorbent commodity of the present invention is applicable with non-woven fabrics is not particularly limited, and can be included Such as the various absorbent commodities such as the disposable diaper of banding pattern or pants type, sanitary napkin, panty liner.The suction of the present 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 rightly be used as surface patch, leakage preventing wall of the absorbent commodities such as disposable diaper, sanitary napkin etc. to exist with wearing The sheet material of the possibility of the skin contact for the person of wearing.

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

The absorbent commodity for forming one embodiment of the present invention is folded with the fibrous layer stack of non-woven fabrics 1 by two fibre layers Body is formed, and the two fibre layers stack includes：1st fibrous layer 2, it 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 1a sides of the 1st fibrous layer 2, 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 Layered product or the fibre lay-up being made up of more than 3 layers 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, can be using fiber number In the range of 1.0dtex~15dtex, fibre length be cotton in the range of 5mm~40mm etc..Wherein, it is for fibre length More than 20mm cotton, when the 1st fibrous layer and the 2nd fiber layer stackup described later are got up (that is, form fibrous layer stack it Border), a part for cotton fiber is easily entered in the 2nd fibrous layer, can improve the liquid permeability of non-woven fabrics, therefore, it is possible to Rightly use.In addition, for being that more than 20mm cotton, fibre length are that below 10mm cotton mixes by fibre length Cotton is mixed, can be that more than 20mm cotton improves the liquid permeability of non-woven fabrics using fibre length, and fiber can be utilized to grow Degree is that below 10mm cotton increases the volume of non-woven fabrics, therefore, it is possible to particularly preferably use.

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 the mass % of e.g. 1 mass %~70, in the range of the mass % of preferably 2 mass %~30.

In the present invention, as long as the thermoplastic resin fibre contained by the 1st fibrous layer is made up of thermoplastic resin Fiber, be just not particularly limited, as the thermoplastic resin, can include, for example, polyethylene (PE), polypropylene (PP), second The olefin-based resins such as alkene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), PLA (PLA) etc. Resin known to polyamide series 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 formed is not particularly limited, can include, 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 fonts etc. are different Tee section fiber type；It is potential to crispatura or the apparent three-dimensional crinkled fibre crispaturaed；Because the physics of current, heat, embossing processing etc. is born Lotus and segmentation fiber for splitting etc., 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 the 2nd fibrous layer described later 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 1.5dtex~4.6dtex scope 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 typically 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 include and for example make use of The processing of surfactant, hydrophilizing agent etc. is (for example, mixing of the surfactant to fibrous inside, surfactant are to fiber table The coating in face etc.) 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 the mass % of e.g. 30 mass %~99, the mass % of preferably 70 mass %~98 scope It is interior.

In addition, in the range of the effect of the present invention is not hindered, the 1st fibrous layer can also contain the cotton and thermoplastic Fiber, arbitrary additive beyond property fiber etc..

Then, the absorbent commodity for forming the present invention is illustrated with the 2nd fibrous layer of non-woven fabrics.Described 2nd Thermoplastic resin fibre contained by fibrous layer is except the fibre with than the thermoplastic resin fibre contained by the 1st fibrous layer Tie up beyond the thick fibre diameter of diameter, be not particularly limited, arbitrary thermoplastic resin fibre can be used, but for fiber Mutual difficulty for twining network etc. considers, in addition to fibre diameter (fiber number), preferably uses and 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) form, have same fibre length fiber).

In addition, the 2nd fibrous layer can also contain thermoplasticity fibre in the range of the effect of the present invention is not hindered Fiber, arbitrary additive beyond 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 is 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 dividing of fibrous layer as described above, the splitting of each fiber interlayer is produced, therefore, even if non-woven fabrics It is the non-woven fabrics for containing cotton as constituent, can also keeps the intensity excellent as non-woven fabrics.

In the present invention, form absorbent commodity and be not limited to above-mentioned embodiment with the fibrous layer stack of non-woven fabrics Two-layer laminate body, the stacking that can also be formed according to desired absorbability, flexibility etc. but by more than 3 layers of fibrous layer Body.In addition, the absorbent commodity number of plies of the non-woven fabrics regardless of fibrous layer stack of the present invention, the of preferably described non-woven fabrics 1 face is formed by the fibrous layer beyond the 1st fibrous layer containing cotton.If the skin abutment face as wearer of absorbent commodity 1st face is formed by the fibrous layer in addition to 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., can keep the skin sense of touch and flexibility excellent as non-woven fabrics.

In addition, in the absorbent commodity non-woven fabrics of the present invention, in addition to the 1st fibrous layer and the 2nd fibrous layer Other fibrous layers be not particularly limited, such as can include 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 the effect of the present invention.

In the present invention, form absorbent commodity to be not particularly limited with the grammes per square metre of each fibrous layer of non-woven fabrics, but go out Consider in intensity, flexibility, absorbability of non-woven fabrics etc., be respectively at such as 1g/m²~60g/m²In the range of, preferably It is 10g/m²~30g/m²In the range of.It is not particularly limited as absorbent commodity with the grammes per square metre of non-woven fabrics, but is typically 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 absorbent commodity of the present invention is not particularly limited with the thickness of non-woven fabrics, typically 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：Described 1st is fine Layer is tieed up, it forms the 2nd face of the non-woven fabrics；2nd fibrous layer, it 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 does not contain cotton, 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, it is possible to make the intensity of the 1st fibrous layer containing cotton more improve.In addition, such non-woven fabrics has 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 be present Fibre weight gradients as (number of fiber) change is more (or from the 1st face to the 2nd face (from the 3rd fibrous layer to the 1st fiber Layer) fibre density increase as fibre density gradient) construction, therefore, be 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 to the 2nd surface side from the 1st surface side of the non-woven fabrics, can play and be used as absorbent commodity The more excellent absorbability of non-woven fabrics (especially infiltration rate, liquid metastatic etc.).

Then, to form the present invention absorbent commodity non-woven fabrics, concavo-convex figuration processing before (formed sag and swell it Before) the manufacture method of fibrous layer stack illustrate.

In the present invention, the means for manufacturing the fibrous layer stack are not particularly limited, and can include following method：Make With the fiber for forming above-mentioned each fibrous layer (that is, for the cotton for forming the 1st fibrous layer and thermoplastic resin fibre, for shape Thermoplastic resin fibre into the 2nd fibrous layer etc.) form the mesh corresponding with each fibrous layer (pile mesh respectively (fleece) fiber in each mesh between mesh), is made physically or chemically to combine each other.

Specifically, two layers of fiber of the 1st fibrous layer and the 2nd fibrous layer can be included according to following order manufacture Layered product.

(1) manufacture device is prepared, the manufacture device possesses：Conveying device, it conveys flat member to a direction；1st Level carding apparatus, it is configured at the upstream side of conveying direction above the conveying device；2nd grade of carding apparatus, it is described The downstream (that is, than the 1st grade carding apparatus downstream) of conveying direction is configured above conveying device；And hot blast mode Heater, it is configured at the downstream of the 2nd grade of carding apparatus.

(2) thermoplastic resin fibre for forming the 2nd fibrous layer is supplied to the 1st grade of carding apparatus, 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 Into the 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 Send the downstream in direction to convey, while cotton and thermoplastic resin for forming the 1st fibrous layer are supplied to the 2nd grade of carding apparatus Fat fiber, fibrillation is carried out to each fiber using the pin of the rotating roller in the carding apparatus, and in conveying with it is the described 2nd fine Tie up and form the 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 the mesh corresponding with the 2nd fibrous layer On the stacking mesh that forms conveyed to the heater of the hot blast mode, in the heater, 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 manufacture that the 1st fibrous layer and the 2nd fibrous layer are laminated two layers Fibrous layer stack.

In addition, in the case of the fibrous layer stack that is made up of more than 3 layers of fibrous layer of manufacture, can use be configured with 3 The manufacture device of level above carding apparatus manufactures in the same manner as said sequence.

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

For the fibrous layer stack being so manufactured into, processed by concavo-convex figuration described later above-mentioned specific to be endowed Sag and swell, obtain the present invention absorbent commodity non-woven fabrics.

Then, the sag and swell of the absorbent commodity non-woven fabrics of the present invention is illustrated in further detail referring to the drawings.

As shown in figures 1-4, the absorbent commodity of one embodiment of the present invention is turned into non-woven fabrics 1 forms the of convex portion 4 The knot for the shape that the direction of 1 face 1a region and the 2nd face 1b face 1b sides of region bends Cheng Cong 2 towards the 1st face 1a sides is protruded Structure.On the other hand, the 1st recess 51 of groove portion 5 turns into the 1st face 1a region and the 2nd face 1b region for forming the 1st recess 51 Bend to the structure for the shape that the direction from the 1st face 1a sides towards the 2nd face 1b sides is protruded.Thus, the non-woven fabrics 1 turns into bumps With extending the 1st direction D provided with the convex portion 4₁The 2nd orthogonal direction D₂On section substantially waveform alternately repeatedly piece Shape.

1st direction D of the convex portion 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 of cloth) multiple row is equipped with the interval predefined.In the present embodiment, each convex portion 4 is with the 1st side of direction To D₁Mode that is continuous and being parallel to each other with other convex portions 4 is extended.

In the absorbent commodity non-woven fabrics of the present invention, the interval preferably between convex portion and adjacent another convex portion is 0.25mm~5mm, it is further preferred that 0.5mm~3mm, more preferably 0.75mm~2mm.Here, " between adjacent convex portion Interval " refers to the 2nd direction D in each convex portion₂On the distance between substantial middle position (top of substantive upper convex portion).

If the distance at the interval between adjacent convex portion is less than 0.25mm, the sag and swell of non-woven fabrics is excessively fine, nothing Spin the contact area between the convex portion of cloth and the skin of wearer and less reduce, accordingly, there exist the surface the (the 1st of non-woven fabrics Face) the possibility that reduces of skin sense of touch, and if the distance at interval between adjacent convex portion more than 5mm, with concavo-convex figuration The difference on the construction between non-woven fabrics (that is, fibrous layer stack) before processing is tailed off, and concavo-convex structure has been applied flexibly accordingly, it is difficult to obtain The soft skin sense of touch made.

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

As shown in figures 1-4, for the absorbent commodity non-woven fabrics 1 of one embodiment of the present invention, in the 2nd direction D₂In space between upper adjacent convex portion 4,4, groove portion 5 is with along the 1st direction D₁The mode of extension is set, and the groove portion 5 has Have：1st recess 51, it possesses the position by the 2nd face 1b direction positioned at the position than the 1st face 1a in the top 41 of convex portion 4 The 1st bottom 51a；And multiple second recesses 52, it is in the 1st recess 51 along the 1st direction D₁Discontinuously set Put, be recessed from the 1st bottom 51a towards the direction of the 2nd face 1b.

The absorbent commodity non-woven fabrics of the present invention possesses such construction with specific convex portion and groove portion, i.e. tool It is standby to be constructed as below：The groove portion has the 1st recess and second recesses, and the 1st recess possesses in the top than the convex portion By the 1st bottom of the position of the 2nd surface side, the second recesses possess surrounding wall portion and the 2nd bottom for the position of 1st surface side, the surrounding wall portion from 1st bottom is risen and is extended to the direction of the 2nd surface side, and the 2nd bottom is in the 2nd surface side of the surrounding wall portion End is set in a manner of blocking the end, therefore, it is possible to by the 1st recess to the 2nd surface side bend buffer 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, it also can 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, overall On it is prominent to the lower surface 1b sides of the non-woven fabrics 1 and possess the inner space of approximately parallelepiped body shape.In addition, the edge of second recesses 52 Length direction (that is, the 1st direction D of each groove portion 5₁Or the 1st recess 51 length direction) arranged with constant interval, it is described Each second recesses 52 are formed as the state separate with other second recesses 52.

In addition, in the present embodiment, the multiple second recesses 52 possess respectively：The surrounding wall portion 52a of wall shape, its With the 1st bottom 51a it is continuous in the state of towards lower surface 1b sides extend；And the 2nd above-mentioned bottom 52b, it is located at the perisporium Portion 52a lower end side.The surrounding wall portion 52a possesses：A pair of the 1st surrounding wall portion 52a₁、52a₁, it is with along the 1st direction D₁'s Mode extends；And a pair of the 2nd surrounding wall portion 52a₂、52a₂, it is with along the 2nd direction D₂Mode extend, a pair the 1st week Wall portion 52a₁、52a₁Mutually relative position, a pair of the 2nd surrounding wall portion 52a are disposed in each other₂、52a₂Also it is disposed in each other mutually mutually To position.

Also, as shown in figures 1 and 3, in a pair of the 1st surrounding wall portion 52a₁、52a₁It is respectively formed with out of the 1st recess 51 The 2nd face 1b hole portion 53 is led in space in portion.In the present embodiment, hole portion 53 is in a pair of the 1st surrounding wall portion 52a₁、52a₁It is each respectively Provided with 1, these hole portions 53 are formed at the 1st surrounding wall portion 52a₁Close to the 2nd bottom 52b position (thus, in 1 the 1st recess 51 there are two hole portions 53.).On the other hand, in a pair of the 2nd surrounding wall portion 52a₂、52a₂And in the absence of the portion equivalent to hole portion 53 Position, each 2nd surrounding wall portion 52a₂As the state all directly linked up with the 2nd bottom 52b of lower end side.

In the absorbent commodity non-woven fabrics of the present invention, the settings of second recesses reason for this is that, reduce the groove of groove portion as far as possible The chance of the skin contact of bottom, the more specifically wearer of the 1st bottom of the 1st recess and absorbent commodity, also, it is even if false If the 1st bottom and the skin contact of wearer, also its contact area is reduced as far as possible.That is, absorbent commodity of the invention There is the structure being easy to according to the order of convex portion, the 1st bottom of following 1st recess with the skin contact of wearer with non-woven fabrics Make, there is the flexibility highest convex portion in the non-woven fabrics to be easy to the skin contact with wearer compared to the 1st bottom So desired construction, moreover, in the absorbent commodity non-woven fabrics of the present invention, consideration connects with the skin contact of wearer Contacting surface accumulates less way and is easy to feel flexibility the fact, is formed by setting above-mentioned second recesses in the absence of the 1st The part of recess, makes the part of the skin contact with wearer in the 1st bottom of the 1st recess less, reduces as far as possible and flesh The chance and contact area of skin touching.

In addition, in the present invention, in order to be difficult to produce indisposed sense, foreign body sensation as caused by being contacted with the second recesses, the 2nd Recess is located at the 1st bottom of the 1st recess, reduces the second recesses and the chance of the skin contact 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 Highly to second recesses the 2nd bottom the 1st surface side height untill length be 0.05mm~2mm, be 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 that The rigidity for the 2nd bottom stated, the intensity of the thickness direction of non-woven fabrics are easy to deficiency.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 deficiency, in addition, when it have compressed, there is a possibility that to produce stiff sense.

In addition, the depth for the second recesses and the relation between the height of the convex portion, preferably described second recesses Depth (that is, from the height of the 1st surface side of the 1st bottom of the 1st recess to the height of the 1st surface side of the 2nd bottom of second recesses Length) be the height of the convex portion (that is, from the height of the 1st surface side of the 1st bottom of the 1st recess to the height at the top of convex portion Length untill degree) 10%~80%, be further preferred that 15%~70%, more preferably 20%~60%.If the described 2nd The depth of recess is less than the 10% of the height of the convex portion, then can not fully ensure the hole in the surrounding wall portion of the second recesses The formation space in portion, therefore, if hole portion is formed or can not formed in the form of insufficient, be difficult to obtain as non-woven fabrics and Excellent flexibility.If on the contrary, the depth of the second recesses exceedes the 80% of the height of the convex portion, hole portion is caused to be formed It is too much, therefore, the intensity decreases of the surrounding 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 a possibility that fully obtain the above-mentioned effect played by the second recesses. It is and flat if the length in the 1st direction of the second recesses more than 5mm, causes the second recesses long on the 1st direction Non-woven fabrics, the non-woven fabrics in the absence of recess are compared, and are difficult in terms of flexibility differential, it is difficult to obtain the skin sense of touch of softness.

On the other hand, the length in the 2nd direction of second recesses is not particularly limited, but preferably 0.25mm~5mm, is entered 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 cause the second recesses too small, the formation of particularly the 2nd bottom becomes insufficient, and accordingly, there exist can not be abundant Ground obtains the possibility for the above-mentioned effect played by the second recesses.If the length in the 2nd direction of the second recesses exceedes 5mm, then cause the second recesses excessive, be possible to easily produce indisposed sense, foreign body sensation when contacting with non-woven fabrics.

In addition, the spacing (that is, the adjacent mutual distance of second recesses on the 2nd direction) on the 2nd direction of second recesses is simultaneously It is not particularly limited, preferably below 1.5mm.If the spacing on the 2nd direction of the second recesses is below 1.5mm, nothing is formed The 2nd bottom that the cotton in the 1st fibrous layer of cloth is easy to be held in the second recesses is spun, therefore, in the 2nd bottom In, it can more be difficult to produce the dividing of fibrous layer as described above, the splitting of each fiber interlayer.

In the present invention, for the hole portion of the surrounding wall portion formation in the second recesses, the length of the largest portion of the hole portion The size of (in the case of present embodiment, the length in the 1st direction) depending on the second recesses, but preferably 0.25mm~ 5mm, it 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, can not fully ensure the flexibility of the second recesses, and, it is difficult to described in reduction The pulling force of fiber at convex portion, it can not fully ensure the flexibility of the convex portion.If the length of the largest portion of the hole portion More than 5mm, then hole portion just becomes too much, and the peripheral part of the hole portion is easy to fluff, and is easy to produce when contacting with non-woven fabrics Indisposed sense, foreign body sensation, it is possible to make the skin sense of touch of non-woven fabrics reduce.

On the other hand, hole portion short transverse (that is, the 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, can not fully ensure described The flexibility of second recesses, and, it is difficult to the pulling force of the fiber at the convex portion is reduced, also can not fully ensure the convex portion Flexibility.If the maximum length of the short transverse of the hole portion, more than 5mm, hole portion just becomes too much, the periphery of the hole portion Portion is easy to fluff, and is easy to produce indisposed sense, foreign body sensation when contacting with non-woven fabrics, it is possible to makes the skin sense of touch of non-woven fabrics Reduce.

In the present invention, the hole portion makes the pulling force of the fiber at convex portion discharge and make convex portion overall or form convex portion The free degree of fiber movement improves, and makes the flexibility, more specifically soft on the thickness direction of the non-woven fabrics at convex portion of convex portion It is soft and soft when 1st direction (length direction), 2nd direction (width) of the skin along non-woven fabrics has been slided Soft (flexibility especially on width) improves and ensures smooth sense of touch, therefore, the only located at the second recesses 1 surrounding wall portion.By the way that formed with hole portion, it is (excellent on the thickness direction of non-woven fabrics excellent soft or hard sense can be assigned to convex portion 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 Different smoothness) both, 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, to make skin along nothing Spin cloth the 1st direction (that is, the direction that convex portion and groove portion are extended) slided when be difficult to be hooked in skin it is recessed by the described 2nd The step that portion is formed, hole portion is not formed in the 2nd surrounding wall portion of the second recesses.

That is, described 2nd surrounding wall portion and the 1st bottom of the 1st recess and the 2nd bottom of the second recesses are continuous, do not have Seam it is integrally formed, therefore, when 1st direction of the skin along non-woven fabrics has been slided, skin simultaneously less feels institute The step of second recesses is stated, is easy to successfully move along convex portion, groove portion.Thereby, it is possible to ensure to have applied flexibly convex portion flexibility, Smoothness on 1st direction of the non-woven fabrics of the flexibility of fiber.

Moreover, in the present invention, in order to be easy to far as possible from skin the convex portion of contact, the 1st recess the 1st bottom, make The chance that the skin of wearer contacts with hole portion is reduced as far as possible, it is difficult to produces indisposed sense, foreign body sensation, hole portion is formed at the described 2nd The position of close 2nd bottom in 1st surrounding wall portion of recess.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 possesses and not made contained by the non-woven fabrics 1 Thermoplastic resin fibre melts but the peripheral part 53a by forming thermoplastic resin fibre fracture.It is more specific and Speech, as shown in figure 3, the peripheral part 53a of hole portion 53 is included with logical in the thermoplastic resin fibre contained by the non-woven fabrics 1 Broken ends 54a in the fracture fiber 54 for the broken ends 54a for crossing fracture and being formed.

Thus, the peripheral part 53a of hole portion 53 is completely absent the part that thermoplastic resin fibre is hardened due to melting, and Be by softness thermoplastic resin fibre a part formed, or by with thermoplastic resin fibre by fracture and shape Into broken ends 54a fracture fiber 54 formed.Thus, even if the skin of the wearer of absorbent commodity and the week of hole portion 53 Edge 53a is contacted, and the thermoplastic resin fibre that is hardened due to melting is also not present, therefore, feel non-woven fabrics hardness, The situation of roughness is suppressed as far as possible.

Here, fracture fiber 54 is to form the 1st surrounding wall portion 52a₁Thermoplastic resin fibre a part of fiber, have logical Cross the thermoplastic resin fibre and alongst to stretch or physically cut off and be broken the broken ends 54a to be formed.

Thus, broken ends 54a is not the end fusing of the fiber as making the situation that thermoplastic resin fibre melted And be rounded, fibre diameter becomes big, but becomes tapering form as having been crushed due to fiber or be nearly free from fiber The form of the change of diameter.Thus, even in the case that the skin of wearer and the peripheral part 53a of hole portion 53 are contacted, production Life is as hardening, the situation of indisposed sense caused by the hook of fiber is also suppressed.

Moreover, as shown in figure 3, a part of fibre in having thermoplastic resin fibre is set up in the inner space 53b of hole portion 53 Dimension 55.In addition, the fracture fiber 54 of a part turns into the state that its broken ends 54a extends to the inner space 53b of hole portion 53.

Thus, turn into and set up to inner space 53b fiber 55 and a part of fiber to extend out in hole portion 53 The state to be mixed in the 53b of inner space, without as completely unlimited space.Turn into if so empty in the inside of hole portion A structure of an essay is provided with the structure of the part of thermoplastic resin fibre, even if then assuming is contacted in skin and the hole portion of wearer In the case of, sense of touch between the side face of recess, bottom, hole portion can also be made not by being set up in the thermoplastic resin fibre of inner space With reducing as far as possible, can enable a wearer to be difficult to produce indisposed sense.That is, it is set up in the thermoplastic resin fibre of the inner space of hole portion Hole portion will not be passed completely through by the skin of wearer and play function in a manner of reaching the 2nd surface side (lower face side) of non-woven fabrics, Therefore, the step in the line of demarcation between the surrounding wall portion or the 2nd bottom and hole portion diminishes in sense of touch, thus, the flesh of non-woven fabrics Skin sense of touch becomes smoother, even in the case that the skin of wearer contacts with hole portion, can also enable a wearer to be difficult to Produce 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 Flexibility too low that convex portion to the fiber imparting free degree at convex portion, convex portion, can not fully ensure.If the hole portion Inner space percent opening more than 50%, then the surrounding wall portion provided with hole portion (is in this case the 1st surrounding wall portion 52a₁) intensity be easy to reduce, also, there is a possibility that the line of demarcation of the peripheral part of hole portion is readily identified in sense of touch.No Cross, the percent opening of the inner space of hole portion can also be according to the species of the absorbent commodity using non-woven fabrics, purposes etc. Beyond above-mentioned scope, 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 Manufacture method.

Fig. 5~Fig. 8 is an example for representing to manufacture the manufacture device of absorbent commodity non-woven fabrics 1, and manufacture device 6 is Used for the fibrous layer being made up of two fibre layers stack 7 to be processed into the absorbent commodity with above-mentioned specific sag and swell The device of non-woven fabrics 1, the two fibre layers include：1st fibrous layer 2, it includes cotton 2a and thermoplastic resin fibre 2b；And the 2 fibrous layers 3, it is adjacent with the one side of the 1st fibrous layer 2, containing thermoplastic resin fibre 3a and does not contain cotton.The manufacture Device 6 possesses：Discharge device 61, the fibrous layer stack 7 before processing are 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, it extends the fibrous layer stack 7 for implementing preheating and carries out being used to form convex portion and groove portion (including the 1st recess and second recesses.) concavo-convex figuration processing.

Preheating device 62 possesses a pair of heating rollers 62a, 62b up and down in present embodiment, can be will be by from the releasing The fibrous layer stack 7 that the processing object come was released and conveyed to device 61 is wound in the heating roller 62b for the lower section being rotating and carried out After heating, join 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 possesses a pair of extensions roller 63a, 63b up and down, as shown in fig. 6, the extension roller 63a tools of top It is standby：Lug, nib 63a₁, it is arranged along roller width with constant interval, along this above extension roller 63a outer peripheral face phase Mutually abreast it is provided with multiple row；And multiple row groove 63a₂, it is located at 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 face 63b₂Provided with the groove 63a of the extension roller 63a with top₂Nibble Multiple pin 63b that the mode of conjunction is set₁.As shown in figure 8, these pins 63b₁With the not extension with top on the width of roller Roller 63a lug, nib 63a₁The mode of contact is arranged with constant interval, also, along outer peripheral face 63b in the circumference of roller₂With perseverance Fixed interval arranges in substantially linear.In addition, as shown in fig. 7, the extension roller 63b of the lower section in present embodiment turns into multiple Sell 63b₁It is serrated and is disposed in the outer peripheral face 63b for extending roller 63b of lower section₂Structure.

In the case where implementing the manufacture of absorbent commodity non-woven fabrics 1 using the manufacture device 6 so formed, successively The fibrous layer stack 7 for carrying out the processing object to being released from discharge device 61 is implemented the preheating procedure of preheating, made via preheating The fibrous layer stack 7 of process extends and carries out the figuration process of concavo-convex figuration processing.

In the preheating procedure, make to be released from discharge device 61, convey the processing object of coming along conveying direction MD Fibrous layer stack 7 contacted with a pair of heating rollers 62a, 62b up and down for being rotating of preheating device 62 outer peripheral face, so as 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 species of thermoplastic resin fibre is suitably set, but is polyethylene terephthalate in such as thermoplastic resin fibre (PET) and in the case of the composite fibre of the core-sheath-type of high density polyethylene (HDPE) (HDPE), the preferred temperature of the outer peripheral face 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 Between entering a pair of extension roller 63a, the 63b up and down being rotating while engagement, make the fibrous layer stack 7 in the top of engagement Extension roller 63a lug, nib 63a₁With groove 63a₂With the extension roller 63b of lower section pin 63b₁Between extend and carry out figuration.This Outside, when figuration process is implemented, preferably enter while upper and lower a pair of extensions roller 63a, 63b are heated into 60 DEG C~120 DEG C one side 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 extension roller 63b of side direction press-in, thus, convex portion 4 is by figuration.On the other hand, the extension roller 63b of lower section circumferentially row Arrange into multiple pin 63b of a row₁Will be with pin 63b₁Tip portion contact fibrous layer stack 7 extension roller 63a upward Corresponding groove 63a₂Interior press-in.Now, in fibrous layer stack 7, with pin 63b₁Non-contacting state is pulled into groove 63a₂Interior part turns into the 1st recess 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 and prolong with the direction being extended along convex portion 4 and groove portion 5 The 1st surrounding wall portion 52a stretched₁, along roller width extend the 2nd surrounding wall portion 52a₂And the 2nd bottom 52b second recesses 52.

In addition, for the 2nd bottom 52b of second recesses 52, when it is formed, extension roller 63a up and lower section are prolonged Stretch in the state of roller 63b bites fibrous layer stack 7, sell 63b₁Tip portion by the abutment portion of fibrous layer stack 7 to recessed Groove 63a₂Interior strength press-in, therefore, substantial fibre density uprises than the fibre density of the other parts of non-woven fabrics.Match somebody with somebody if so The fibre density for the 2nd bottom 52b being placed between two adjacent convex portions 4 is relatively higher, then forms the upper of the non-woven fabrics 1 Contained by the thinner thermoplastic resin fibre 2b of the fibre diameter contained by the 1st fibrous layer 2 stated and the 1st fibrous layer 2 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 dividing of fibrous layer as producing above-mentioned prior art, the splitting of each fiber interlayer.Pass through It is locally provided with non-woven fabrics and multiple is difficult to produce the dividing of such fibrous layer, the part of the splitting of each fiber interlayer (that is, the 2nd bottom), even if so as to assume partly to generate the dividing of fibrous layer as described above, the interlayer of each fiber interlayer Peel off, also do not produce the dividing of fibrous layer, the splitting of each fiber interlayer in the 2nd bottom, can effectively prevent nothing Spin cloth intensity decreases on the whole.

Also, the non-woven fabrics 1 has in thickness direction D_TOn from the relatively low convex portion 4 of fibre density to fibre density There is the construction of density gradient in the 2nd bottom 52b of highest second recesses 52, therefore, from the upper surface 1a (of the non-woven fabrics 1 1 face) side the supply urine, the body fluid such as menses that come is easy to from the convex portion 4 of the upper surface 1a sides of the non-woven fabrics 1 via the 2nd bottom 52b Introduced to lower surface 1b (the 2nd face) side, 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 (width of roller) two The part of ends contact, form the 1st surrounding wall portion 52a₁Thermoplastic resin fibre in pin 63b₁Effect and lug, nib 63a₁By fibre Separated when tieing up the extension roller 63b of layered product 7 downwards direction press-in under the booster action of caused tension force, or fracture and Form the fracture fiber 54 with broken ends 54a.Thus, the broken ends for including fracture fiber 54 are formed in second recesses 52 54a hole portion 53.In addition, a part of thermoplastic resin fibre is remained with being set up in the inner space 53b of hole portion 53 state, separately Outside, the broken ends 54a of part fracture fiber 54 turns into the state extended in the 53b of inner space.

Here, hole portion 53 is formed at the 1st surrounding wall portion 52a₁, the 1st surrounding wall portion 52a₁Along following direction, the direction is edge The conveying direction MD of the fibrous layer stack 7 of processing object direction, i.e. extension roller 63a, 63b direction of rotation, and be The direction being extended along convex portion 4 and groove portion 5.

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

Hereinafter, the absorbent commodity of 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 that is made up of 3 layers of fibrous layer with non-woven fabrics Stack, fibrous layer stack (non-woven fabrics) include：3rd fibrous layer, it forms the 1st face of non-woven fabrics, contains thermoplastic resin fibre And cotton is not contained；2nd fibrous layer (intermediate 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, contains cotton.In the absorbent commodity non-woven fabrics so formed It is described when being used as the surface patch of absorbent commodity in a manner of the skin opposite face that the 1st face of the non-woven fabrics turns into wearer 2nd fibrous layer is as 3rd fibrous layer of the intermediate 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, urine of cotton absorb, remained to the 1st fibrous layer etc. Body fluid is difficult to the 3rd fibrous layer transmission, and then is difficult to the skin transmission to wearer, is enabled a wearer to accordingly, it is difficult to produce Perceive the state of humidity or enable a wearer to feel sultry etc. and enable a wearer to situation as producing sense of discomfort.

As the specific structure of 3 layers of fibrous layer stack in another embodiment, include 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 fibers

[intermediate layer] (the 2nd fibrous layer)

[the 2nd face (non-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 fibers, fiber number 1.7dtex, fibre length 45mm and grammes per square metre 1g/m²PET/PE sheath-core type conjugate fibers and grammes per square metre 1g/m²Cotton mixing Thing

In addition, in another embodiment of the invention, absorbent commodity is the fibre that is made up of 3 layers of fibrous layer with non-woven fabrics Layered product is tieed up, fibrous layer stack (non-woven fabrics) includes：2nd fibrous layer, it forms the 1st face of non-woven fabrics；1st fiber Layer (intermediate layer), it is adjacent with the face of the 2nd surface side of the 2nd fibrous layer, contains cotton；And the 3rd fibrous layer, itself and it is the 1st fine It is adjacent to tie up the face of the 2nd surface side of layer, containing thermoplastic resin fibre and does not contain cotton.The absorbent commodity nonwoven so formed Cloth by the 1st face of the non-woven fabrics turn into wearer skin opposite face in a manner of be used as absorbent commodity surface patch when, As the 3rd fibrous layer between the 1st fibrous layer containing cotton and the 2nd surface side of the convex portion in the 1st face for being located at the non-woven fabrics Construction between the space part of (non-skin is with respect to surface side), therefore, by 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 caused moisture absorption, be maintained in the cotton of the 1st fibrous layer, and And can enclose in the space part and the 3rd fibrous layer (in addition, the space part as make from absorber release it is wet The space that gas is stopped with the state of moisture plays function, the auxiliary that the 3rd fibrous layer is enclosed as the moisture that will be discharged from absorber Space plays function.).As a result, the moisture discharged from absorber can be effectively sealing into than the 1st fibrous layer By that in the region of the 2nd surface side, 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 include it is for example following that The structure of sample.

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

[intermediate layer] (the 1st fibrous layer)

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

In addition, in above-mentioned each embodiment, the thermoplastic resin fibre contained by the 3rd fibrous layer does not have spy Do not limit, the thermoplastic resin same with the thermoplastic resin fibre contained by the 1st fibrous layer or the 2nd fibrous layer can be used fine 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 has the thermoplasticity contained by than the 1st fibrous layer respectively The big fibre diameter (fiber number) of the fibre diameter (fiber number) of resin fibre.If non-woven fabrics (fibrous layer stack) possesses 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 is possible to make containing cotton The intensity of 1st fibrous layer further improves.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, contains cotton even in the fibrous layer for forming non-woven fabrics In that case of, it is also difficult to produce the splitting of each fiber interlayer.

In addition, one embodiment of the present invention absorbent commodity with non-woven fabrics 1, the hole portion of the second recesses 52 53 are located at along the 1st direction D₁A pair of the 1st surrounding wall portion 52a being formed of mode₁, but in the absorbent commodity nothing of the present invention Spin in cloth, such form is not limited to, for example, hole portion can both be located at a pair of the 1st surrounding wall portion 52a₁In a perisporium Portion, it can also be located at along the 2nd direction D₂A pair of the 2nd surrounding wall portions being formed of mode, or any one week can also be located at Wall portion.

Moreover, above-mentioned embodiment absorbent commodity with non-woven fabrics 1, hole portion 53 is located at the second recesses 52 The position of close 2nd bottom 52b in surrounding 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 located at arbitrary position in the range of the flexibility of non-woven fabrics is not damaged.

In addition, above-mentioned embodiment absorbent commodity with non-woven fabrics 1, in the inner space 53b of the hole portion 53 Internal frame is provided with a part of fiber 55 in thermoplastic resin fibre, but in the absorbent commodity non-woven fabrics of the present invention, sets up Fiber in the inner space of such hole portion can also be not present.In addition, in the present invention, can also be unlike above-mentioned embodiment party Formula makes the broken ends of fracture fiber extend into the inner space of hole portion like that.

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

Moreover, in the above-described embodiment, 1st direction D of the convex portion 4 along the non-woven fabrics 1₁Continuously extend, but In the absorbent commodity non-woven fabrics of the present invention, convex portion may not can also continuously extend along the 1st direction of non-woven fabrics, separately It is outer or discontinuous.But, for second recesses, be preferably disposed to the 1st recess is sandwiched in convex portion continuous part Between the 1st bottom, thus, convex portion is easy to first with the skin contact of wearer, and the skin of wearer is difficult to and the second recesses Contact, therefore, it is possible to more be difficult to produce indisposed sense, foreign body sensation as caused by contacting with the second recesses.

The absorbent commodity of the present invention is not restricted to above-mentioned embodiment etc. with non-woven fabrics, is not departing from the present invention's In the range of purpose, purport, appropriately combined, change etc. can be carried out.In addition, in this manual, the ordinal number such as " the 1st ", " the 2nd " is used Distinguished in the item for being labeled with the ordinal number, be not intended to the order of each item, relative importance value, importance etc..

Description of reference numerals

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

Claims

1. a kind of absorbent commodity non-woven fabrics, it is the absorbent commodity non-woven fabrics being made up of at least two fibre layers, should At least two fibre layers include：1st fibrous layer, it contains cotton and thermoplastic resin fibre；And the 2nd fibrous layer, its with it is described At least one 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 of the 1st face and the side opposite with the 1st face, and the non-woven fabrics has：Multiple convex portions, It is extended and along 2nd side orthogonal with the 1st direction on the 1st face of the non-woven fabrics along the 1st direction To the interval setting to have predefined, protruded towards the direction in the 1st face；And multiple groove portions, it is along the 1st side To be extended, and on the 2nd direction be located at the adjacent convex portion between, towards the 2nd face direction be recessed,

The groove portion has：1st recess, it possesses the position of the 1st surface side described in ratio in the top of the convex portion and leans on institute State the 1st bottom of the position of the 2nd surface side；And multiple second recesses, it does not connect in the 1st recess along the 1st direction Set, be recessed from the 1st bottom towards the direction in the 2nd face continuously,

The second recesses possess：Surrounding wall portion, it is extended from the 1st bottom to the direction of the 2nd surface side；And 2nd bottom, it is set in the end of the 2nd surface side of the surrounding wall portion in a manner of blocking the end, has the nonwoven Highest fibre density in cloth.

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

The surrounding wall portion has along a pair of the 1st surrounding wall portions in the 1st direction and a pair the 2nd week along the 2nd direction Wall portion, the hole portion for leading to the 2nd face is provided with least one of the pair of 1st surrounding 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 in addition to the 1st fibrous layer.

4. according to non-woven fabrics according to any one of claims 1 to 3, wherein,

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

5. according to non-woven fabrics according to any one of claims 1 to 4, wherein,

The non-woven fabrics includes：1st fibrous layer, it forms the 2nd face；2nd fibrous layer, itself and the 1st fiber The face of 1st surface side of layer is adjacent；And the 3rd fibrous layer, it is adjacent with the face of the 1st surface side of the 2nd fibrous layer, contains thermoplasticity Resin fibre and cotton is not contained, the grammes per square metre of the thermoplastic resin fibre of each fibrous layer is identical, the heat contained by the 3rd fibrous layer Plastic resin fiber have with the fibre diameter of the thermoplastic resin fibre contained by the 2nd fibrous layer it is identical or its more than Fibre diameter.