JP2013176895A - Sheet-like material for absorbent article, absorbent article using the same, and method for manufacturing sheet-like material for absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the following problems: it is difficult to manufacture sheet-like materials, materials become unnecessarily thick since large wrinkles are made at a periphery of a pile bundle, gaps formed by the wrinkles decrease permeability of a liquid in a front-back direction, fiber ends project from the pile bundle to stimulate the skin.SOLUTION: A sheet-like material 80 for absorbent article is formed by: arranging a fiber aggregate layer 83 formed by aggregating continuous fiber which is continuous in a predetermined direction in a bundle shape without joining the fiber along the base layer 81, on one side of the base layer 81; fixing the fiber aggregate layer 83 to the base layer 81 intermittently in a predetermined direction; shrinking the base layer 81 to push an unfixed part between base layer fixed parts 82 of the fiber aggregate layer 83 so as to be separated from on side of the shrinkable base layer 81; and forming a pile bundle 84.

Description

  The present invention relates to a sheet-like material for absorbent articles, an absorbent article using the same, and a method for producing the sheet-like material for absorbent articles.

  Generally, an absorbent article has a basic structure in which an absorber is interposed between a liquid-permeable top sheet that forms a body-side surface and a liquid-impermeable sheet that is positioned on the outer surface side. Excreted fluid such as menstrual blood passes through the top sheet and is absorbed and retained by the absorber.

  In such an absorbent article, in order to reduce the contact area between the surface and the skin, improve air permeability, prevent reversion, and the like, it is known to form a large number of irregularities on the entire surface of the top sheet. Yes. As a method for forming irregularities, many methods using embossing have been proposed (see, for example, Patent Document 1).

  However, the formation of irregularities by embossing has a problem that it is inevitable to harden the material. In order to avoid this, the base layer in which the fiber protruding holes penetrating the front and back are arranged throughout, the nonwoven fabric layer disposed on one side of the base layer, and the portion corresponding to the fiber protruding hole in the nonwoven fabric layer are the base layer. A sheet-like material for absorbent articles has been proposed, comprising a pile bundle protruding to the other side of the base layer, which is formed to protrude from the one side to the other side through a fiber protruding hole.

  However, in this prior example, it is necessary to project the non-woven fabric layer disposed on one side of the base layer to the other side through the fiber projecting holes of the base layer, which makes it difficult to manufacture.

  Moreover, in this prior example, since the material which forms a pile bundle is a nonwoven fabric, ie, the fiber assembly which the fiber entangled, when this is extruded and a pile bundle is formed, (a) A pile bundle will become a hard thing. b) Large wrinkles near the pile bundle in the nonwoven fabric layer, and the material becomes unnecessarily thick. (c) The voids formed by the wrinkles reduce the liquid permeability in the front and back directions. (d) Short fiber nonwoven fabric In this case, or even if it is a long-fiber non-woven fabric, there is a problem that when the fiber is cut by the extrusion of the pile bundle, the fiber end protrudes from the pile bundle and the touch is tinged.

JP 2003-126147 A JP-T-2006-512514

  Therefore, a main problem of the present invention is to facilitate the manufacture and solve the problems (a) to (d).

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
On one side of the shrinkable base layer is disposed a fiber assembly layer in which continuous fibers continuous in a predetermined direction along the base layer are gathered in a bundle without joining the fibers,
After the fiber assembly layer is intermittently fixed to the base layer in the predetermined direction, the base layer is contracted, whereby a non-fixed portion between the base layer and the fixed portion in the fiber assembly layer is changed to the base layer. Extruding away from one side of the pile to form a pile bundle,
A sheet-like material for absorbent articles.

(Function and effect)
In the present invention, the bundle of continuous fibers that are not bonded to each other and the base layer are intermittently fixed in the fiber continuous direction, and the unfixed portion is pushed out by contraction of the base layer to form a pile bundle. Thus, since it is not necessary to project the nonwoven fabric layer arranged on one side of the base layer to the other side through the fiber projecting holes of the base layer, it can be manufactured without using a special manufacturing technique.

  In addition, since the material forming the pile bundle is a continuous fiber bundle in which the fibers are not joined to each other, the pile bundle does not become stiff and does not cause large wrinkles around the pile bundle. There is no need for thickening, and voids formed by wrinkles do not reduce the liquid permeability in the front and back direction. Furthermore, it is not necessary to mechanically extrude the fiber assembly layer as in the previous example, and because the fibers are not joined to each other, the fibers are difficult to cut, and the fiber ends protrude from the pile bundle and the skin feels tingling Is unlikely to occur. Of course, the advantage of forming irregularities without embossing (the pile bundle becomes a convex portion and the pile bundle becomes a concave portion) and the advantage of forming the irregularities on the surface are not impaired.

<Invention of Claim 2>
The sheet-like material for absorbent articles according to claim 1, wherein the pile bundle has a shape having a longer diameter in plan view than the height.

(Function and effect)
By making the pile bundle in such a horizontally long shape in advance, the posture of the pile bundle is stabilized on the base layer, and the shape stability of the pile bundle in use before use is improved. In particular, since the fiber assembly is made of continuous fibers, there is a possibility that a force applied to a certain part may act so as to extract a pile bundle of another part. Therefore, such a pull-out preventing action is one of important actions. .

<Invention of Claim 3>
The sheet-like material for absorbent articles according to claim 1 or 2, wherein the pile bundle is lying down.

(Function and effect)
Thus, the shape stability of a pile bundle improves by lying down a pile bundle. In particular, since the fiber assembly is made of continuous fibers, there is a possibility that a force applied to a certain part may act so as to extract a pile bundle of another part. Therefore, such a pull-out preventing action is one of important actions. .

<Invention of Claim 4>
The sheet-like material for absorbent articles according to any one of claims 1 to 3, wherein the pile bundle is a cut pile bundle whose front ends are cut and aligned.

(Function and effect)
By making such a cut pile bundle, a softer and softer feel than the loop pile bundle can be obtained.

<Invention of Claim 5>
The sheet-like material for absorbent articles according to any one of claims 1 to 4, wherein the constituent fibers of the fiber assembly layer are crimped fibers.

(Function and effect)
If the constituent fiber of the fiber assembly layer is a crimped fiber, the fiber itself has a stretching action, so that the fiber is difficult to cut during production, and even after production, the pile bundle does not easily swell and become flat. Become.

<Invention of Claim 6>
The base layer elastically expands and contracts in the predetermined direction, and the fiber assembly layer is intermittently fixed to the base layer in the predetermined direction with the base layer extended in the predetermined direction. By releasing the elongation and shrinking the base layer, a non-fixed portion between the base layer and the fixed portion in the fiber assembly layer is pushed away from one side of the base layer to form a pile bundle. The sheet-like material for absorbent articles according to any one of claims 1 to 5.

(Function and effect)
By making the base layer elastically expand and contract in this way, a pile bundle can be formed by contracting the base layer using the expansion and contraction. Such a manufacturing process can be easily realized by existing technology.

<Invention of Claim 7>
The base layer is thermally contracted in the predetermined direction, and the fiber aggregate layer is intermittently fixed to the base layer in the predetermined direction, and then the base layer is heated and contracted to thereby shrink the fiber aggregate. The absorption according to any one of claims 1 to 5, wherein a pile bundle is formed by extruding a non-fixed portion between the base layer and the fixed portion of the layer so as to be separated from one side of the base layer. Sheet material for functional articles.

(Function and effect)
By making the base layer heat shrink in this way, a pile bundle can be formed by shrinking the base layer using the heat shrinkage of the base layer. Such a manufacturing process can be easily realized by existing technology.

<Invention of Claim 8>
The sheet-like material for absorbent articles according to any one of claims 1 to 7, which is a top sheet of the absorbent article, wherein the surface from which the pile bundle protrudes forms a skin contact surface.

(Function and effect)
The skin contact surface of such a top sheet has a pile bundle as a convex part and a gap between the pile bundles as a concave part, so that the contact area between the surface and the skin can be reduced, air permeability can be improved, and reversion can be prevented. it can.

<Invention of Claim 9>
A liquid-permeable top sheet forming a body-side surface, a liquid-impermeable sheet located on the back side thereof, and an absorbent body disposed between the liquid-permeable top sheet and the liquid-impermeable sheet. In the absorbent article provided,
As the top sheet, the sheet-like material for absorbent articles according to any one of claims 1 to 7 is provided so that the pile bundle is on the front side.
An absorbent article characterized by the above.

(Function and effect)
The same effects as those of the invention of the eighth aspect can be achieved.

<Invention of Claim 10>
On one side of the shrinkable base layer is disposed a fiber assembly layer in which continuous fibers continuous in a predetermined direction along the base layer are gathered in a bundle without joining the fibers,
After the fiber assembly layer is intermittently fixed to the base layer in the predetermined direction, the base layer is contracted, whereby a non-fixed portion between the base layer and the fixed portion in the fiber assembly layer is changed to the base layer. Extruding away from one side of the pile to form a pile bundle,
The manufacturing method of the sheet-like raw material for absorbent articles characterized by the above-mentioned.

(Function and effect)
Each effect similar to that of the first aspect of the invention can be achieved.

  As described above, according to the present invention, the above problems (a) to (d) are solved.

It is a top view in the state where the diaper was developed showing the inner surface of a tape type disposable diaper. It is a top view in the state where the diaper was developed showing the outer surface of a tape type disposable diaper. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 1. FIG. 9 is a sectional view taken along line 9-9 in FIG. 1. FIG. 5 is a sectional view taken along line 5-5 of FIG. It is a perspective view showing roughly the sheet-like material for absorbent articles. It is a longitudinal cross-section (cross section of a surface parallel to XZ plane of FIG. 8) along the continuous direction of the fiber of the sheet-like material for absorbent articles. It is a longitudinal cross-section (cross section of a surface parallel to XZ plane of FIG. 8) along the continuous direction of the fiber of the sheet-like material for absorbent articles. It is a longitudinal cross-section (cross section of a surface parallel to the YZ plane of FIG. 8) in alignment with the direction orthogonal to the continuous direction of the fiber of the sheet-like material for absorbent articles. It is a longitudinal cross-section (cross section of a surface parallel to the YZ plane of FIG. 8) in alignment with the direction orthogonal to the continuous direction of the fiber of the sheet-like material for absorbent articles. It is a longitudinal cross-section (cross section of a surface parallel to the YZ plane of FIG. 8) in alignment with the direction orthogonal to the continuous direction of the fiber of the sheet-like material for absorbent articles. It is a longitudinal cross-section (cross section of a surface parallel to XZ plane of FIG. 8) along the continuous direction of the fiber of the sheet-like material for absorbent articles. It is a top view of the sheet-like material for absorbent articles. It is a longitudinal cross-section (cross section of a surface parallel to XZ plane of FIG. 8) along the continuous direction of the fiber of the sheet-like material for absorbent articles.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<Examples of absorbent articles>
1-7 has shown an example of the tape type disposable diaper, the code | symbol X in a figure has shown the full width of the diaper except a fastening tape, the code | symbol L has shown the full length of the diaper, and it is in sectional drawing. The dot pattern portion indicates a hot melt adhesive application portion.

  This tape-type disposable diaper is a part that extends from the lower abdomen through the crotch part to cover the buttocks along the center in the width direction, and the liquid-permeable top sheet 30 that forms the body side surface, and the outer surface An absorbent main body 10 which is a part where the absorbent element 50 is interposed between the liquid-impermeable sheet 11 located on the side and a part extending to the front side and the rear side of the absorbent main body part 10 respectively. And a ventral end flap portion EF and a dorsal end flap portion EF, which are portions that do not have the absorption element 50.

  Moreover, this tape-type disposable diaper has a pair of side flap parts SF and SF extending laterally from the side edge of the absorber, and the fastening tape 13 is provided on the side flap parts SF and SF on the back side. Are provided.

  More specifically, the entire outer surface of the absorbent main body 10 and the side flap portions SF, SF is formed by the exterior sheet 12. In particular, in the absorbent main body 10, a liquid-impermeable sheet 11 is fixed to the inner surface side of the exterior sheet 12 with an adhesive such as a hot-melt adhesive, and an absorbent element is further disposed on the inner surface side of the liquid-impermeable sheet 11. 50, the intermediate sheet 40, and the top sheet 30 are laminated in this order. The top sheet 30 and the liquid-impermeable sheet 11 are rectangular in the illustrated example, have slightly larger dimensions in the front-rear direction and the width direction than the absorbent element 50, and are eaten from the side edges of the absorbent element 50 in the top sheet 30. The peripheral edge that protrudes and the peripheral edge that protrudes from the side edge of the absorbent element 50 in the liquid-impermeable sheet 11 are fixed by a hot melt adhesive or the like. The liquid-impermeable sheet 11 is made of a moisture-permeable polyethylene film or the like and is formed to be slightly wider than the top sheet 30.

  Further, on both sides of the absorbent main body 10, side solid gathers 60, 60 that protrude (stand up) toward the wearer's skin are provided, and the gather sheets that form the side solid gathers 60, 60 are provided. 62 and 62 are fixed in a range from the both side portions of the top sheet 30 to the inner surfaces of the side flap portions SF and SF.

Hereinafter, the material and the characteristic part of each part are demonstrated in order.
(Exterior sheet)
The exterior sheet 12 is a part that supports the absorbent element 50 and is attached to the wearer. The exterior sheet 12 has an hourglass shape in which the center part in the front-rear direction on both sides is constricted, and this is a part into which the wearer's leg is placed.

The exterior sheet 12 is preferably a non-woven fabric, but is not limited thereto. The type of the nonwoven fabric is not particularly limited, and as the material fiber, for example, synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester or polyamide, recycled fibers such as rayon or cupra, and natural fibers such as cotton are used. As a processing method, a spunlace method, a spunbond method, a thermal bond method, an air-through method, a needle punch method, or the like can be used. However, a long-fiber nonwoven fabric such as a spunbond nonwoven fabric, an SMS nonwoven fabric, or an SMMS nonwoven fabric is preferable in that both the touch and strength can be achieved. In addition to using a single nonwoven fabric, a plurality of nonwoven fabrics can be used. In the latter case, the nonwoven fabrics are preferably bonded to each other with a hot melt adhesive or the like. When using a nonwoven fabric, the fabric weight is preferably 10 to 50 g / m ² , particularly 15 to 30 g / m ² .

(Liquid impervious sheet)
The material of the liquid-impermeable sheet 11 is not particularly limited. For example, the liquid-impermeable sheet 11 is substantially made of an olefin resin such as polyethylene or polypropylene, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet, or a waterproof film. Non-woven fabrics that ensure liquid impermeability (in this case, liquid impervious sheets are composed of waterproof films and non-woven fabrics). Of course, in addition to this, a liquid-impermeable and moisture-permeable material that has been used and used in recent years from the viewpoint of preventing stuffiness can also be exemplified. As the sheet of the material having liquid impermeability and moisture permeability, for example, an inorganic filler is kneaded in an olefin resin such as polyethylene or polypropylene, and the sheet is formed, and then stretched in a uniaxial or biaxial direction. Examples of the microporous sheet obtained in this way can be given. In addition, non-woven fabric using micro-denier fiber, strengthening leak-proofing by reducing the voids of the fiber by applying heat or pressure, and applying water-absorbing resin or hydrophobic resin or water repellent. A sheet that is liquid-impermeable without using a film can also be used as the liquid-impermeable sheet 11.

(Top sheet)
In the form shown in FIG. 1, a sheet-like material for an absorbent article, which will be described later, is used as the top sheet 30. However, the top sheet 30 only needs to have liquid permeability, for example, a porous or non-porous nonwoven fabric. Alternatively, a porous plastic sheet can be used. Of these, the nonwoven fabric is not particularly limited as to what the raw fiber is. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated. Furthermore, the nonwoven fabric may be manufactured by any processing. Examples of the processing method include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method. For example, the spun lace method is a preferable processing method for obtaining flexibility and drapeability, and the thermal bond method is for obtaining bulkiness and softness.

  The top sheet 30 may be composed of a single sheet or a laminated sheet obtained by bonding two or more sheets. Similarly, the top sheet 30 may be composed of one sheet or two or more sheets in the planar direction.

(Intermediate sheet)
An intermediate sheet (also referred to as a second sheet) 40 can be provided between the top sheet 30 and the absorbent element 50 in order to move excrement that has passed through the top sheet 30 to the absorbent body and prevent reversal. This intermediate sheet 40 not only quickly transfers the excrement to the absorber to enhance the absorption performance by the absorber, but also prevents the excretion of the absorbed excrement from returning from the absorber and improves the feel of the top sheet 30 surface. To do. The intermediate sheet 40 can be omitted.

  As the intermediate sheet 40, the same material as the top sheet 30 can be used. The intermediate sheet 40 is preferably bonded to the top sheet 30. When heat embossing or ultrasonic welding is used for the bonding, the material of the intermediate sheet 40 preferably has the same melting point as the top sheet 30. Further, considering the permeation of the solid content in the stool, the fineness of the fiber used for the intermediate sheet 40 is preferably 5.0 to 7.0 dtex, but the liquid residue in the top sheet 30 increases. On the other hand, when the fineness of the fiber used for the intermediate sheet 40 is 1.0 to 2.0 dtex, the liquid residue of the top sheet 30 hardly occurs, but the solid content of the stool is difficult to permeate. Therefore, it is preferable that the fiber of the nonwoven fabric used for the intermediate sheet 40 has a fineness of about 2.0 to 5.0 dtex.

  The intermediate sheet 40 in the illustrated form is arranged in the center shorter than the width of the absorbent element 50, but may be provided over the entire width. The length in the longitudinal direction of the intermediate sheet 40 may be the same as the entire length of the diaper, may be the same as the length of the absorbent element 50, or may be within a short length range centered on the region that receives the liquid.

(Side three-dimensional gather)
In order to prevent urine and soft stool that move laterally on the top sheet 30 and prevent side leakage, side solid gathers 60 and 60 that protrude (stand up) on the use surface side are provided on both sides of the product. Is preferred.

  The side three-dimensional gather 60 includes a gather sheet 62 that is substantially continuous in the width direction, and an elongated elastic elastic member 63 that is fixed to the gather sheet 62 in a stretched state along the front-rear direction. As the gather sheet 62, a water-repellent nonwoven fabric can be used, and as the elastic elastic member 63, rubber thread or the like can be used. As shown in FIGS. 1 and 2, a plurality of elastic elastic members can be provided in addition to a plurality of elastic expansion members.

  The inner surface of the gather sheet 62 has a fixing start end in the width direction on the side portion of the top sheet 30, and a portion on the outer side in the width direction from the fixing start end is on the side portion of the liquid-impermeable sheet 11 and on the outer side in the width direction. It fixes to the side part of the exterior sheet | seat 12 located with the hot-melt-adhesive agent etc. Out of the fixing portions, on the outer side in the width direction near the fixing start end, elastic elastic members 64 around the legs made of rubber thread or the like are provided along the front-rear direction between the sheets where the gather sheet 62 and the exterior sheet 12 face each other. It has been.

  Around the legs, the width direction inner side from the fixing start end of the side three-dimensional gather 60 is fixed on the top sheet 30 at both ends in the product front-rear direction, but the portion between them is an unfixed free part. The portion comes to stand by the contraction force of the rubber thread 63. When the diaper is worn, the diaper is attached to the body in the shape of a boat, and the contraction force of the rubber thread 63 acts. Therefore, the side three-dimensional gather 60 stands up due to the contraction force of the rubber thread 63 and comes into close contact with the legs. . As a result, so-called side leakage from around the legs is prevented.

  Unlike the illustrated embodiment, the front and rear direction end portions of the gather sheet 62 on the inner side in the width direction are divided into a base end side portion extending inward in the width direction from an outer portion in the width direction and a center side in the width direction of the base end side portion. It is also possible to fix in a double-folded state having a distal end side portion that is folded back from the edge toward the body side and extends outward in the width direction, and the portion in between can be an unfixed free portion.

(Absorption element)
The absorption element 50 is a part that absorbs and holds liquid such as urine and loose stool. The absorbent element 50 includes an absorbent body 56 and a packaging sheet 58 that wraps at least the back and side surfaces of the absorbent body 56. The packaging sheet 58 can be omitted. The absorbent element 50 can be adhered to the inner surface of the liquid-impermeable sheet 11 via an adhesive such as a hot melt adhesive on the back surface.

(Absorber)
The absorber 56 can be formed of an aggregate of fibers. As this fiber assembly, a filament assembly obtained by opening, as necessary, synthetic fiber tows (fiber bundles) such as cellulose acetate as well as short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber basis weight can be set to, for example, about 100 to 300 g / m ² when cotton-like pulp or short fibers are stacked, and in the case of a filament aggregate, for example, about 30 to 120 g / m ^2. Can do. The fineness in the case of a synthetic fiber is 1-16 dtex, for example, Preferably it is 1-10 dtex, More preferably, it is 1-5 dtex. In the case of a filament aggregate, the filament may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used.

(Superabsorbent polymer particles)
The absorbent body 56 preferably includes superabsorbent polymer particles. In particular, at least in the liquid receiving region, the superabsorbent polymer particles (SAP particles) are dispersed substantially throughout the thickness direction with respect to the aggregate of fibers. Is desirable.

  If there is no SAP particle in the upper part, the lower part, and the middle part of the absorber 56, or if there is very little, it cannot be said that the "absorbed throughout the thickness direction". Therefore, “distributed in the entire thickness direction” means “distributed unevenly in the upper part, the lower part, and / or the middle part of the aggregate of fibers in addition to the form“ uniformly ”distributed in the entire thickness direction. However, it is still included in the form of being dispersed in the upper, lower and middle portions. Further, a form in which some SAP particles do not enter the fiber assembly and remain on the surface thereof, and a form in which some SAP particles pass through the fiber assembly and are on the packaging sheet 58 are also excluded. It is not something.

  Superabsorbent polymer particles include “powder” in addition to “particles”. As the particle diameter of the superabsorbent polymer particles, those used in this type of absorbent article can be used as they are, and those having a particle size of 1000 μm or less, particularly 150 to 400 μm are desirable. The material of the superabsorbent polymer particles can be used without any particular limitation, but those having a water absorption of 40 g / g or more are suitable. High-absorbent polymer particles include starch-based, cellulose-based, and synthetic polymer-based starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and sodium carboxymethylcellulose crosslinks. Or an acrylic acid (salt) polymer can be used. As the shape of the superabsorbent polymer particles, a commonly used granular material is suitable, but other shapes can also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 40 seconds or less are preferably used. When the water absorption speed exceeds 40 seconds, so-called reversion in which the liquid supplied into the absorber 56 returns to the outside of the absorber 56 is likely to occur.

The basis weight of the superabsorbent polymer particles can be appropriately determined according to the amount of absorption required for the use of the absorber 56. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the amount of polymer is less than 50 g / m ^2, it is difficult to secure the absorption amount. When it exceeds 350 g / m ² , not only the effect is saturated, but also the sensation of incongruity due to the excess of the superabsorbent polymer particles is given.

(Packaging sheet)
When the packaging sheet 58 is used, as the material, tissue paper, particularly crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used. However, it is desirable that the superabsorbent polymer particles be a sheet that does not escape. When a nonwoven fabric is used in place of the crepe paper, a hydrophilic SMMS (spunbond / meltblown / meltblown / spunbond) nonwoven fabric is particularly suitable, and polypropylene, polyethylene / polypropylene, etc. can be used as the material. The fiber basis weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  As shown in FIG. 3, the packaging sheet 58 may wrap only the back surface and the side surface of the layer in addition to the form for wrapping the entire absorbent body 56. Although not shown, only the upper and side surfaces of the absorbent body 56 are covered with crepe paper or a nonwoven fabric, and the lower surface is covered with a liquid-impermeable sheet such as polyethylene, and the upper surface of the absorbent body 56 is covered with crepe paper or a nonwoven fabric. For example, the lower surface may be covered with a liquid-impermeable sheet such as polyethylene (each of these materials is a component of the packaging sheet). If necessary, the absorbent body 56 may be sandwiched between two upper and lower sheets or disposed only on the lower surface, but this is not desirable because it is difficult to prevent the movement of the superabsorbent polymer particles.

(Fastening tape)
As shown in FIG. 1, FIG. 2 and FIG. 5, the fastening tape 13 is attached to the diaper with the end portion of a sheet base material made of nonwoven fabric, plastic film, polylaminated nonwoven fabric, paper or a composite material thereof as a tape attachment portion 13C. The hook part of the mechanical fastener is provided in the tape main-body part 13B which is the front end side part which protrudes from the diaper side edge as the latching | locking part 13A with respect to a stomach side. The tape attachment portion of the fastening tape is sandwiched between the gather sheet forming the inner layer and the exterior sheet forming the outer layer in the side flap portion, and is bonded to both the sheets 62 and 30 by a hot melt adhesive. The hook material 13A is joined to the sheet base material 13C with an adhesive so as not to be peeled off.

  In the baby diaper, among the dimensions of the tape attachment portion 13C, the length X1 of the diaper in the width direction is preferably 10 to 50 mm, particularly 20 to 40 mm, and the length Y1 in the front-rear direction is 20 to 100 mm, particularly It is preferable that it is 40-80 mm. Of the dimensions of the tape body 13B, the length of the diaper in the width direction is preferably 30 to 80 mm, particularly 40 to 60 mm, and the length (height) in the front-rear direction is 20 to 70 mm, particularly 25 to 25 mm. 50 mm is preferred. In addition, when a part or all of the fastening tape 13 has a substantially tapered shape, for example, and the length in the front-rear direction and the length in the width direction are not constant, the numerical range is determined by an average value. The fastening tape 13 may have a symmetrical shape such as a rectangular shape. However, if the fastening tape 13 is a convex shape composed of a wide attachment portion and an elongated tip side portion, the grip portion on the tip side portion can be easily picked and This is preferable because the tension between the bases of this region acts over a wide range. The hook member 13A has a large number of engaging protrusions on the outer surface side. The shape of the engaging protrusion is (A) Le-shaped, (B) J-shaped, (C) Mushroom-shaped, (D) T-shaped, (E) Double J-shaped (J-shaped And the like may be any shape. Instead of the hook material 13 </ b> A, an adhesive material layer can be provided as a locking portion of the fastening tape 13.

  When the diaper is mounted, the fastening tape is locked at a suitable position on the outer surface of the abdominal side F with the back side flap portion SF overlapped with the outside of the abdominal side flap portion SF. The position and size of the fastening portion of the fastening tape 13 can be arbitrarily determined. In diapers for infants, the locking location is a rectangular range of 20 to 80 mm in the front-rear direction and 150 to 300 mm in the width direction, and the distance in the height direction between the upper edge and the ventral upper edge is 0 to 60 mm, particularly 20 to 50 mm. And the center in the width direction of the product.

  When the fastening tape 13 is attached so that the tape attachment portion 13C of the fastening tape 13 overlaps the boundary line between the back end flap portion EF and the absorbing element 50, the fastening tape 13 is placed between the attachment portions of the left and right fastening tapes 13 when the diaper is attached. This is preferable because the back end portion of the absorbent element 50 is firmly pressed against the body by the tension acting on the body. Moreover, if the attachment part of the fastening tape 13 is too far from the back side end part (rear end part) of the diaper, the tension acting between the tape attachment parts 13C of the left and right fastening tapes 13 when the diaper is mounted is on the back side of the diaper. Since it does not reach the end, a gap is likely to occur between the back end of the diaper and the body surface. Therefore, the length in the front-rear direction of the back end flap portion EF is preferably the same as or shorter than the length in the front-rear direction of the tape attachment portion 13 </ b> C of the fastening tape 13.

(Target sheet)
It is preferable to provide a target sheet 12T having a target for facilitating the locking at the locking position of the fastening tape 13 on the ventral side F. As the target sheet 12T, when the hook portion is the hook material 13A, a target sheet 12T can be used in which a large number of loop yarns are formed on the surface of a sheet base material made of a plastic film or nonwoven fabric so that the hook material engagement protrusions are entangled. In the case of an adhesive material layer, a sheet base material made of a plastic film having a smooth surface that is rich in adhesiveness can be used. Further, when the fastening portion of the fastening tape 13 on the ventral side F is made of a nonwoven fabric, for example, when the exterior sheet 12 of the illustrated form is made of a nonwoven fabric and the fastening portion of the fastening tape 13 is a hook material 13A, The target sheet 12T can be omitted, and the hook material 13A can be entangled with the nonwoven fabric of the exterior sheet 12 and locked. In this case, the target sheet 12T may be provided between the exterior sheet 12 and the liquid-impermeable sheet 11.

(End flap)
The end flap part is a part that extends to the front side and the rear side of the absorbent main body part 10 and does not have the absorbent element 50, and the front side extension part is the ventral end flap part EF. The rear extended portion is the back end flap portion EF.

  The length in the front-rear direction of the back end flap EF is preferably the same as or shorter than the length in the front-rear direction of the attachment portion of the fastening tape 13 for the reason described above. If it is too close, a gap is likely to occur between the back end of the diaper and the body surface due to the thickness and stiffness of the absorbent element 50, so that it is preferably 10 mm or more.

  The length in the front-rear direction of the ventral end flap portion EF and the back end flap portion EF is preferably about 5 to 20% of the length L in the front-rear direction of the entire diaper. In diapers for infants, 10-60 mm, In particular, a thickness of 20-50 mm is appropriate.

(Back elastic sheet)
In the illustrated form, a belt-like back-side elastic sheet 70 that elastically expands and contracts in the width direction is provided between the fastening tapes 13 to improve the fit in the diaper back side. Both end portions of the back-side elastic sheet 70 are preferably extended to a portion that overlaps with the attachment portions of both fastening tapes 13, but may be separated to the center in the width direction. The back-and-forth stretchable sheet 70 has a front-rear dimension that is approximately the same as the front-rear dimension of the attachment portion of the fastening tape 13, but may have a dimensional difference of about ± 20%. In addition, when the back side elastic sheet 70 is arranged so as to overlap the boundary line between the back side end flap portion EF and the absorbent element 50 as shown in the figure, the back side end portion of the absorbent element 50 is firmly pressed against the body. Therefore, it is preferable. The back-side elastic sheet 70 may use a sheet-like elastic member such as a rubber sheet, but it is preferable to use a nonwoven fabric or paper from the viewpoint of air permeability. In this case, a sheet-like elastic member having air permeability such as a stretchable nonwoven fabric can be used. However, as shown in FIG. 5, the sheet base material 71 such as two nonwoven fabrics is bonded with an adhesive such as a hot melt adhesive. Preferably, the elastic stretch member 72 such as a perforated sheet, net, or elongated (thread or string) is fixed in a stretched state in the width direction between the sheet bases 71. Used. As the sheet base 71 in this case, the same one as the exterior sheet 12 can be used. It is preferable that the elastic expansion / contraction member 72 has an extension ratio of about 150 to 250%. In addition, when an elongated (stretch or string-like) member is used as the elastic elastic member 72, it is preferable to provide about 5 to 15 members having a thickness of 420 to 1120 dtex at intervals 72d of 3 to 10 mm.

  In addition, it is preferable that a part of the elastic expansion / contraction member 72 is arranged so as to cross the absorbent element 50 as shown in the figure because the fitting property of the absorption element 50 is improved. If the contraction force is prevented from acting on a part or all of the overlapping portion by means such as cutting, the back end of the absorbent element 50 does not contract in the width direction, so that the fit is further improved.

  The elastic elastic member 72 may be fixed over the entire length of the sheet base material 71 in the longitudinal direction of the sheet (width direction of the diaper). In the range of about 5 to 20 mm at the end in the front-rear direction (diaper width direction), it is preferable that the contraction force does not work or the elastic elastic member 72 does not exist.

  In the illustrated embodiment, the back-side stretchable sheet 70 is sandwiched between the gather sheet 62 and the exterior sheet 12 on both sides in the width direction of the liquid-impermeable sheet 11 and overlaps with the liquid-impermeable sheet 11. Although provided so as to be sandwiched between the permeable sheet 11 and the absorbent element 50, it may be provided between the liquid-impermeable sheet 11 and the exterior sheet 12, or provided on the outer surface of the exterior sheet 12. Alternatively, it may be provided between the top sheet 30 and the absorbent element 50. Further, the back-side elastic sheet 70 may be provided on the top sheet 30. In this case, the back-side elastic sheet 70 may be provided on the gather sheet 62 on both sides in the width direction of the liquid-impermeable sheet 11. Further, when the exterior sheet 12 is formed by stacking a plurality of sheet base materials, the entire back side elastic sheet 70 may be provided between the sheet base materials of the exterior sheet 12.

(Sheet-like material for absorbent articles)
FIGS. 8-16 has shown an example of the sheet-like raw material 80 for absorbent articles, and this absorbent sheet-like raw material 80 is predetermined along the base layer 81 on one side of the shrinkable base layer 81. A fiber assembly layer 83 in which continuous fibers continuous in a direction (in the illustrated example, the front-rear direction is assumed, but may be other directions such as a width direction and an oblique direction) are gathered in a bundle without joining each other. After the fiber assembly layer 83 is intermittently fixed to the base layer 81 in a predetermined direction, the base layer 81 is contracted, so that between the base layer fixing portion 82 and the base layer fixing portion 82 in the fiber assembly layer 83 The unfixed portion is extruded so as to be separated from one side of the base layer 81 to form a pile bundle 84. The pile bundle 84 has a loop shape in which continuous fibers are not joined to each other, and each fiber can be freely deformed and swells away from the base layer. If the tip of the loop pile bundle 84 is cut, a cut pile bundle 84C as shown in FIG. 14 can be formed. By using such a cut pile bundle 84, a softer and softer feel than that of the loop pile bundle 84 can be obtained. However, the loop pile bundle 84 is superior in elasticity and resilience. Of course, the cut pile bundle 84 and the loop pile bundle 84 may be mixed.

  In the sheet material 80 for absorbent articles, at least the continuous fibers constituting the pile bundle 84 are not joined to each other, and individual fibers can be freely deformed. There is no large wrinkle around the bundle 84. Therefore, the material is not unnecessarily thickened, and the void formed by the wrinkles does not reduce the liquid permeability in the front and back direction. Furthermore, unlike the preceding example, it is not necessary to mechanically extrude the fiber assembly layer 83 and the fibers are not joined to each other. Therefore, the fibers are difficult to cut, and the fiber ends protrude from the pile bundle 84 and the touch is tingling. It is hard to happen. Of course, the advantage of forming irregularities without embossing (the pile bundle 84 becomes a convex portion and the space between the pile bundles 84 becomes a concave portion) and the advantage of forming irregularities on the surface are not impaired.

  In addition, a large number of pile bundles 84 can be easily manufactured only by a combination of intermittently fixing the base layer 81 and the fiber assembly layer 83 and contracting the base layer 81 after fixing. One preferable method is that the base layer 81 is elastically expanded and contracted at least in the predetermined direction described above, and the fiber assembly layer 83 is intermittently fixed to the base layer 81 in the predetermined direction with the base layer 81 extended in the predetermined direction. Later, by releasing the extension of the base layer 81 and shrinking the base layer 81, the unfixed portion between the base layer fixing portions 82 in the fiber assembly layer 83 is pushed away from one side of the base layer 81 to pile up the pile bundle. 84 is formed. In this case, the pile bundle 84 can be formed by contracting the base layer 81 using the elastic expansion and contraction of the base layer 81. More specifically, in the production line, the base layer 81 is stretched in the line flow direction by line drawing (tensile force in the flow direction) of the base layer 81 and bonded to the fiber assembly layer 83 and then cut individually. The base layer 81 can be contracted with respect to the fiber assembly layer 83 by opening the draw. Such a manufacturing process can be easily realized by existing technology.

  Another preferable method is that the base layer 81 is thermally contracted at least in the predetermined direction described above, and the fiber aggregate layer 83 is intermittently fixed to the base layer 81 in the predetermined direction, and then the base layer 81 is heated and contracted. The pile bundle 84 is formed by extruding a non-fixed portion between the base layer fixing portions 82 in the fiber assembly layer 83 so as to be separated from one side of the base layer 81. In this case, the pile bundle 84 can be formed by utilizing the heat shrinkage of the base layer 81. More specifically, after the base layer 81 and the fiber assembly layer 83 are intermittently fixed, they are heated through a contact heating device such as a hot air treatment device or a heating roll that heats the both in a non-contact manner with hot air. Thus, the base layer 81 can be thermally contracted. Such a manufacturing process can be easily realized by existing technology.

The material of the base layer 81 is not particularly limited as long as it can shrink after intermittent fixation with the fiber assembly layer 83. When using elastic expansion / contraction as the contraction principle, the base layer 81 is a stretch sheet formed by fixing rubber or a stretch nonwoven fabric in a predetermined direction to a sheet material such as a nonwoven fabric or a film in a predetermined direction. A material having rubber elasticity such as a stretchable nonwoven fabric itself or a rubber sheet itself is preferably used. In addition, when the pile bundle 84 may be small, it is possible to use a material having an elastic deformation region even slightly in a tensile test, such as a porous or non-porous nonwoven fabric or a resin film. As this unemployed fabric, olefins such as polyethylene and polypropylene, synthetic fibers such as polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, etc., and two or more of these were used. Interwoven fibers, composite fibers, and the like that are entangled by a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air-through method, a point bond method, or the like can be suitably used. In this case, the fineness of the fiber is preferably about 1.0 to 5.0 dtex, and the basis weight is preferably about 10 to 50 g / m ² .

  On the other hand, when heat shrinkage is used as the shrinkage principle, a known heat-shrinkable nonwoven fabric or heat-shrinkable resin sheet can be used as the base layer 81.

The fiber assembly layer 83 is not particularly limited as long as it is a bundle of continuous fibers. For example, 3,000 to 1,000,000, preferably about 5,000 to 1,000,000 single fibers are used. A tow formed by bundling is preferably opened as necessary. The basis weight of the fiber assembly layer 83 can be, for example, about 10 to 50 g / m ² , preferably about 18 to 30 g / m ² , and the thickness (when the pressure is 0.5 g / cm ² ) is, for example, 1 to 10 mm, preferably Can be about 2 to 5 mm.

  The fineness of the continuous fibers can be, for example, about 1.0 to 7.0 dtex, preferably about 1.5 to 3.3 dtex. The continuous fiber may be a non-crimped fiber, but is preferably a crimped fiber. The crimped degree of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably about 15 to 50 per inch. Further, a crimped fiber that is uniformly crimped is often used. When crimped fibers are used, the fibers themselves have a stretching action, so that the fibers are difficult to cut during production, and even after production, the pile bundle does not swell and become flat. The cross-sectional shape of the continuous fiber is not particularly limited, and may be any of, for example, a circular shape, an oval shape, an irregular shape (for example, a Y shape, an X shape, an I shape, an R shape) or a hollow shape. Good.

  Since continuous fibers have weak entanglement between fibers, a binder having an action of adhering or fusing the contact portion of the fibers to a portion excluding the pile bundle can be used mainly for the purpose of maintaining the shape. Examples of binders include ester plasticizers such as triacetin, triethylene glycol diacetate, triethylene glycol dipropionate, dibutyl phthalate, dimethoxyethyl phthalate, and triethyl citrate, as well as various resin adhesives, especially thermoplastic resins. Can be used.

  Examples of continuous fiber materials include polysaccharides or derivatives thereof (cellulose, cellulose ester, chitin, chitosan, etc.), synthetic polymers (polyethylene, polypropylene, polyamide, polyester, polylactamamide, polyvinyl acetate, etc.), A mixed fiber, a composite fiber, or the like in which two or more of these are used can be used.

  As the cellulose, plant-derived cellulose such as cotton, linter and wood pulp, bacterial cellulose and the like can be used, and regenerated cellulose such as rayon may be used. Examples of cellulose esters include organic acid esters such as cellulose acetate, cellulose butyrate, and cellulose propionate; mixed acid esters such as cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, and cellulose nitrate acetate; and polycaprolactone Cellulose ester derivatives such as grafted cellulose ester can be used. These cellulose esters can be used alone or in admixture of two or more. The viscosity average degree of polymerization of the cellulose ester is, for example, about 50 to 900, preferably about 200 to 800. The average substitution degree of the cellulose ester can be, for example, about 1 to 3, preferably 1 to 2.15, and more preferably about 1.1 to 2.0. The average degree of substitution of the cellulose ester can be selected from the viewpoint of enhancing biodegradability.

  As the cellulose ester, an organic acid ester (for example, an ester with an organic acid having about 2 to 4 carbon atoms), particularly cellulose acetate is suitable. The degree of acetylation of cellulose acetate is often about 43 to 62%, but about 30 to 50% is particularly preferable because it is excellent in biodegradability.

  The continuous fiber may contain various additives such as a heat stabilizer, a colorant, an oil agent, a yield improver, a whiteness improver, and the like.

  The shape of the pile bundle 84 can be determined as appropriate, but the shape of the pile bundle 84 is higher than that of a shape having a height 84h higher than a diameter 84w in plan view (a long diameter if not a perfect circle) as shown in FIGS. When the diameter 84w in plan view as shown in FIGS. 12 and 13 is longer than the height 84h, the posture of the pile bundle 84 is stabilized on the base layer 81, and the pile bundle 84 in use before and during use. This is preferable because the shape stability is improved. Describing in more detail, the form shown in FIG. 9 is a loop pile bundle 84 in the form of Ω or mushroom having a height 84 h lower than the horizontal length 84 w when viewed in a longitudinal section along the continuous direction of the continuous fibers. The form shown in FIG. 10 is the same as the form shown in FIG. 9 except that the height 84h is higher than the lateral length 84w. On the other hand, the form shown in FIG. 11 is a form in which the pile bundle 84 is not lying down when viewed in a longitudinal section along the direction orthogonal to the continuous direction of the continuous fibers, and the form shown in FIG. 13 is a form in which the pile bundle 84 is cracked in two in the middle in the lateral direction and is lying down. In this way, the pile bundle 84 can be ensured in shape stability by lying down beforehand. The presence or absence of such a fall can be changed by the presence or absence of the process which crushes or falls the pile bundle 84 between a pair of rolls.

  The dimensions of the pile bundle 84 can be determined as appropriate. In a normal case, the height 84h of the pile bundle 84 can be about 4 to 7 mm, and the diameter (major axis) 84w in plan view can be about 4 to 12 mm. Moreover, although the fiber amount (fiber weight of a non-fixed part) of the pile bundle 84 can also be determined suitably, it can be about 16-420 mg normally. These elements can be changed by selecting the material of the fiber, the fiber length of the non-fixed part, the size / interval of the base layer fixed part, and the presence / absence of processing to crush or collapse the pile bundle 84 between a pair of rolls. is there.

  The shape of the base layer fixing portion 82 can be determined as appropriate, such as a circle, an ellipse, a triangle, a quadrangle, and a line. The dimension of the base layer fixing portion 82 may be determined as appropriate, but it is desired that the length 82w in the fiber continuous direction (shrink direction) is short, and in the normal case, it is preferably about 2 to 15 mm. The dimension 82w may be set such that the pile bundle 84 is separated in addition to the pile bundle 84 being in contact. Moreover, although the space | interval (length of a non-fixed part) 82d between the base layer fixed parts 82 in a fiber continuation direction can be suitably determined according to the dimension of the pile bundle 84, in order to make the shape stability of the pile bundle 84 favorable. In addition, it is preferable that it is configured to be about 1/2 to 5/8 before contraction due to contraction. Specifically, the interval 82d between the base layer fixing portions 82 in the fiber continuous direction is 4 to 30 mm before shrinkage, particularly 4 to 20 mm, and 2.5 to 15.0 mm after shrinkage, particularly 2.5 to 10.0 mm. It is preferable to be about. In addition to being uniform in the fiber continuation direction, the interval 82d can be partially widened (or narrowed).

  Further, as shown in FIGS. 15B and 15C, in order to improve the shape stability of the pile bundle 84 when the base layer fixing portion 82 is intermittently provided in the direction orthogonal to the fiber continuous direction. The length 82y of the base layer fixing portion 82 in the direction is preferably 2.5 to 15.0 mm, particularly about 2.5 to 10.0 mm, and the interval 82s ( The maximum value in the case of changing in the fiber continuous direction as in the example of FIG. 15 (c) is preferably about 2.5 to 15.0 mm, particularly about 2.5 to 10.0 mm.

  The arrangement of the base layer fixing portions 82 may be irregular or regular, but in the case of regular arrangement, as shown in FIG. 15 (a), horizontal stripes (base layer fixing continuous in the width direction) Portion 82 is provided at a predetermined interval in the front-rear direction), a staggered pattern as shown in FIG. 15B, or a slanted grid pattern as shown in FIG. 15C. . Further, the base layer fixing portion 82 (that is, the pile bundle 84) is preferably provided over the entire sheet, but can also be provided locally, such as at the center in the width direction of the sheet.

  The fixing means 85 for intermittently fixing the base layer 81 and the fiber assembly layer 83 to form the base layer fixing portion 82 includes, for example, a hot melt adhesive as shown in the figure, heat seal, ultrasonic seal, etc. Well-known joining means such as those obtained by welding these materials can be used.

  Further, when the sheet material 80 for absorbent articles is used as the top sheet 30 in which the protruding surface of the pile bundle 84 forms a skin contact surface, as shown in FIG. If the fiber amount of the pile bundle 84 in both side portions EP is larger than the fiber amount of the pile bundle 84 in the intermediate portion MP among the EP and the intermediate portion MP between them, the damming action by the pile bundle 84 is achieved. It is preferable because the height can be increased at both side portions EP, and the so-called side leakage prevention effect is excellent. In addition to or instead of this, when the fiber amount of the pile bundle 84 at the front and rear end portions of the front sheet front and rear end portions and the intermediate portion therebetween is larger than the fiber amount of the pile bundle 84 at the intermediate portion, This is preferable because the so-called front / rear leakage prevention effect is excellent.

  In this case, as shown in FIG. 16, it is also a preferable form that the height of the pile bundle 84 at both side portions EP is higher than the height of the pile bundle 84 at the intermediate portion MP. However, if the height of the pile bundle 84 at a specific portion is simply increased, the shape and posture of the pile bundle 84 may be difficult to stabilize. It is preferable that the interval between the base layer fixing portions 82 in the direction orthogonal to the direction is relatively large and the neck portion of the pile bundle 84 is thickened to improve the shape and posture stability. In addition, when the space between the base layer fixing portions 82 is large and small as described above, the amount of fibers in the pile bundle 84 increases even if the pile height is the same or small, so that the manufacturing becomes extremely easy.

<Explanation of terms>
The term “front-rear direction (vertical direction)” means the direction connecting the ventral side (front side) and the back side (rear side), “width direction” means the direction (left-right direction) orthogonal to the front-rear direction, The “vertical direction” means a wearing state of the diaper, that is, a direction orthogonal to the width direction when the diaper is folded in two at the crotch portion so that the abdomen portion and the back portion of the diaper are overlapped.

  Further, the term “elongation rate” means a value when the natural length is 100%.

  The term “pile bundle fiber amount” means the fiber weight of the pile bundle portion.

  The present invention can be used as the sheet-like material 80 for absorbent articles, and the top sheet 30, the intermediate sheet 40, the gather sheet 62, the exterior sheet 12, and the target in the absorbent article as shown in FIGS. Although it can be used as an aggregate of fibers constituting the sheet 12T or the absorbent body 56, it is particularly preferable to use it as the top sheet 30 in which the protruding surface of the pile bundle 84 forms a skin contact surface. In this case, on the skin contact surface of the top sheet 30, the pile bundle 84 becomes a convex portion, and the space between the pile bundles 84 becomes a concave portion, so that the contact area between the surface and the skin is reduced, air permeability is improved and reversion is prevented. Can be planned.

  DESCRIPTION OF SYMBOLS 11 ... Liquid impervious sheet, 12 ... Exterior sheet, 13 ... Fastening tape, 13A ... Locking part, 13B ... Tape body part, 13C ... Tape attachment part, 30 ... Top sheet, 40 ... Intermediate sheet, 50 ... Absorbing element 56 ... Absorber, 58 ... Packaging sheet, 60 ... Side gathers, 62 ... Gather sheet, 70 ... Back elastic sheet, 12T ... Target sheet, 80 ... Sheet material for absorbent articles, 81 ... Base layer, 82 ... base layer fixing part, 83 ... fiber assembly layer, 84 ... pile bundle, 84C ... cut pile bundle, 85 ... fixing means.

Claims (10)

On one side of the shrinkable base layer is disposed a fiber assembly layer in which continuous fibers continuous in a predetermined direction along the base layer are gathered in a bundle without joining the fibers,
After the fiber assembly layer is intermittently fixed to the base layer in the predetermined direction, the base layer is contracted, whereby a non-fixed portion between the base layer and the fixed portion in the fiber assembly layer is changed to the base layer. Extruding away from one side of the pile to form a pile bundle,
A sheet-like material for absorbent articles.   The sheet-like material for absorbent articles according to claim 1, wherein the pile bundle has a shape having a longer diameter in plan view than the height.   The sheet-like material for absorbent articles according to claim 1 or 2, wherein the pile bundle is lying down.   The sheet-like material for absorbent articles according to any one of claims 1 to 3, wherein the pile bundle is a cut pile bundle whose front ends are cut and aligned.   The sheet-like material for absorbent articles according to any one of claims 1 to 4, wherein the constituent fibers of the fiber assembly layer are crimped fibers.   The base layer elastically expands and contracts in the predetermined direction, and the fiber assembly layer is intermittently fixed to the base layer in the predetermined direction with the base layer extended in the predetermined direction. By releasing the elongation and shrinking the base layer, a non-fixed portion between the base layer and the fixed portion in the fiber assembly layer is pushed away from one side of the base layer to form a pile bundle. The sheet-like material for absorbent articles according to any one of claims 1 to 5.   The base layer is thermally contracted in the predetermined direction, and the fiber aggregate layer is intermittently fixed to the base layer in the predetermined direction, and then the base layer is heated and contracted to thereby shrink the fiber aggregate. The absorption according to any one of claims 1 to 5, wherein a pile bundle is formed by extruding a non-fixed portion between the base layer and the fixed portion of the layer so as to be separated from one side of the base layer. Sheet material for functional articles.   The sheet-like material for absorbent articles according to any one of claims 1 to 7, which is a top sheet of the absorbent article, wherein the surface from which the pile bundle protrudes forms a skin contact surface. A liquid-permeable top sheet forming a body-side surface, a liquid-impermeable sheet located on the back side thereof, and an absorbent body disposed between the liquid-permeable top sheet and the liquid-impermeable sheet. In the absorbent article provided,
As the top sheet, the sheet-like material for absorbent articles according to any one of claims 1 to 7 is provided so that the pile bundle is on the front side.
An absorbent article characterized by the above. On one side of the shrinkable base layer is disposed a fiber assembly layer in which continuous fibers continuous in a predetermined direction along the base layer are gathered in a bundle without joining the fibers,
After the fiber assembly layer is intermittently fixed to the base layer in the predetermined direction, the base layer is contracted, whereby a non-fixed portion between the base layer and the fixed portion in the fiber assembly layer is changed to the base layer. Extruding away from one side of the pile to form a pile bundle,
The manufacturing method of the sheet-like raw material for absorbent articles characterized by the above-mentioned.

Images