JPH10192341A - Surface sheet for absorptive article and manufacture therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a sheet shape in a moist level and to destroy it with the large amount of water by forming a first outer side area provided with synthetic fibers as well on both sides of a center area composed of hydrophilic fibers and pulp fibers and branching and forming the second outer side area of the synthetic fibers only from the boundary with the center area. SOLUTION: A synthetic fiber nonwoven fabric folded into two on a folding line 2 is prepared and at least a part of both side edge parts in a vertical direction of a web composed of the hydrophilic fibers and the pulp fibers is overlapped. The high pressure water jet flow processing of the overlapped part is performed and a vertical direction middle area 1a is formed. The entire synthetic fiber cloth on the upper side of the folding line 2 and the overlapped part of the vertical direction center area 1a of the web are similarly processed and the first outer side area 1b is formed. A flexible elastic body 3 is provided on the side edge and a three-dimensional gather 9 is attained. The second outer side area 1c is formed by the part on the lower side of the folding line 2. By the fiber constitution, the sheet shape is maintained in a moist state and it is destroyed with the large amount of water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a surface sheet for an absorbent article. More specifically, according to the present invention, the center region in the longitudinal direction is formed by hydroentanglement of hydrophilic fibers and pulp fibers, and has a sufficient bonding strength even in a wet state when used, but the web structure may be affected by a large amount of water flow. It is a water-disintegrable nonwoven fabric that disintegrates, and is not only integrated with the synthetic fiber nonwoven fabric that exists on both sides of the water-disintegrable nonwoven fabric,
It is a surface sheet of an absorbent article also having three-dimensional gathers.
The surface sheet of the absorbent article of the present invention can be suitably used for diapers, sanitary napkins, incontinence pads, and the like,
The water-disintegratable nonwoven fabric present in the central region in the longitudinal direction of the topsheet is a topsheet of the absorbent article that can be easily separated from the absorbent article body.

[0002]

2. Description of the Related Art Generally, sanitary goods are disposed of as garbage after use. In particular, in the case of disposable diapers, the disposal method when excrement is
After removing the disposable diaper from the user, taking the disposable diaper to the toilet, and removing and discarding only the stool, the remaining disposable diapers are disposed of as ordinary garbage, which is very troublesome and inconvenient. If you are a young child,
It is very unsanitary because most of the stools are soft stools and it is difficult to remove the stool from the disposable diaper, so the stool is not completely removed and is disposed of with common combustible waste. . In addition, the same applies to sanitary products and incontinence pads, and there are difficulties in disposing them.

[0003] For this reason, it has been conventionally proposed to use a water-disintegrable nonwoven fabric as a surface sheet for absorbent articles such as sanitary articles. At this time, the water-disintegrable nonwoven fabric which can be used as a surface sheet of the absorbent article is in a wet state at the time of its use, so that the sheet-like web structure is maintained in a dry state as well as in a wet state and is sufficiently durable for use. In addition, two properties are required, in which the web structure is collapsed by a very small force with a large amount of water to return to the original fiber shape. Many of the so-called water-disintegrable nonwoven fabrics today contain a water-soluble substance as an adhesive in a part of the nonwoven fabric.
However, when such a nonwoven fabric is used as a surface sheet of a disposable diaper or a sanitary product, the water-soluble substance elutes in a wet state, and not only impairs the feeling during use, but also
Inability to maintain the seat strike web composition.

Further, in order to dispose of used absorbent articles more sanitarily, the topsheet is peeled off from the main body of the absorbent article, and the contaminated topsheet and the main body of the absorbent article are discarded separately. It has been proposed. For example, as described in JP-A-51-38536 and JP-A-58-55201, a sewing machine is provided on a top sheet or a back sheet so that only the absorbent layer in a diaper can be discarded after use. It is proposed to take a look. However, even if the contaminated topsheet is separated from the diaper body, the topsheet must be disposed of as general garbage, which is unsanitary.

Also, JP-A-48-92140, JP-A-49-94450, JP-A-50-83115, JP-B-3-64137, and JP-B-4-5377.
As described in Japanese Patent Publication No. 9 and other publications, it has a two-layer structure composed of a sheet whose top sheet is separable. Separately, it has been proposed to dispose as garbage. However, these are also inconvenient because the topsheet must be discarded as general garbage.

[0006]

In view of such circumstances, the present inventors have developed a nonwoven fabric in which a water-disintegratable nonwoven fabric and a synthetic fiber nonwoven fabric are integrated, and the water-disintegratable nonwoven fabric is easily separated from the synthetic fiber nonwoven fabric. Not only that, but also a method for producing a surface sheet of an absorbent article having three-dimensional gathers was intensively studied. As a result, the present inventors formed a web by mixing hydrophilic fibers and pulp fibers to form a web without using any adhesive when manufacturing the longitudinal center region of the nonwoven fabric. After overlapping at least a part of the synthetic fiber non-woven fabric with both side edges in the vertical direction, a high-pressure water jet stream is jetted, and the hydrophilic fibers and pulp fibers located in the central region in the vertical direction are entangled with each other to form a water-disintegrable non-woven fabric. In addition, the non-woven fabric obtained by integrating the water-disintegrable nonwoven fabric and the synthetic fiber nonwoven fabric located on both side edges thereof has a three-dimensional gather, and the water-disintegrable nonwoven fabric can be easily separated from the synthetic fiber nonwoven fabric. Further, the separated water-disintegratable nonwoven fabric has excellent wet strength, and the sheet-like form is maintained when it is wetted with a liquid. Shape and have completed the present invention found that the destruction.

An object of the present invention is to provide a water-disintegratable nonwoven fabric located in the central region of a topsheet having three-dimensional gathers, which can be easily separated from a synthetic fiber nonwoven fabric. In the wet state by, the sheet shape is maintained, and it is extremely easy to immerse in a large amount of water,
An object of the present invention is to provide a surface sheet of an absorbent article which can be rapidly disintegrated into a fibrous form, and a method for producing the same.

[0008]

Means for Solving the Problems In a topsheet of an absorbent article composed of a nonwoven fabric mainly composed of hydrophilic fibers, pulp fibers and synthetic fibers, the central region in the longitudinal direction of the topsheet is made of hydrophilic fibers and pulp fibers. The first outer region made of hydrophilic fibers, pulp fibers, and synthetic fibers is formed outside both side edges of the longitudinal central region of the topsheet, and the first outer region of the topsheet is formed. A stretchable elastic body is disposed in an extended state at a side edge along the longitudinal direction of the region, and further a second outer region branched from a boundary between the central region and the first outer region, and made of synthetic fiber is provided. It exists in the surface sheet of the absorbent article characterized by being formed.

A third outer region made of synthetic fiber is formed outside the first outer region of the topsheet, and a stretchable elastic body is provided on a side edge along a longitudinal direction of the third outer region. The absorbent article has a surface sheet that is disposed in an extended state.

[0010] Further, there is provided a top sheet for an absorbent article, wherein cut lines are formed at both side edges of a central region in the longitudinal direction of the top sheet.

[0011] Further, a web is formed by mixing a hydrophilic fiber having a fiber length of 4 to 20 mm and a pulp fiber, and both sides of the web in the longitudinal direction and a synthetic fiber nonwoven fabric folded at a bending line along the longitudinal direction are formed. After overlapping the portions existing above the folding line, the web and the synthetic fiber nonwoven fabric are placed on a transfer conveyor made of mesh, and then a high-pressure water jet stream is jetted onto the web and the synthetic fiber nonwoven fabric. hand,
While the fibers are entangled with each other, the web and the synthetic fiber non-woven fabric are integrated and dried to form a sheet.Furthermore, the web and the synthetic fiber non-woven fabric are stretched to a side edge along a longitudinal direction of the overlapped portion. The present invention resides in a method for manufacturing a topsheet of an absorbent article, wherein an elastic body is provided in an extended state, and the overlapped portion is bent so as to wrap the elastic body inward.

[0012] Further, both edges of the web in the longitudinal direction and at least a part of the portion above the folding line of the synthetic fiber nonwoven fabric folded at the folding line along the longitudinal direction, including the folding line, are overlapped. Thereafter, a high-pressure water jet stream is jetted to form a sheet, which is dried to form a sheet. Further, a stretchable elastic body is disposed in an extended state on a side edge along a longitudinal direction of the synthetic fiber nonwoven fabric, and the stretchable elastic body is provided. The present invention provides a method for producing a topsheet of an absorbent article, wherein the synthetic fiber nonwoven fabric is bent so as to wrap the body inside. A method for producing a topsheet for an absorbent article, comprising a step of making a cut line in a portion of the web adjacent to a portion where the web and the synthetic fiber nonwoven fabric overlap.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The surface sheet of the absorbent article of the present invention is composed of a nonwoven fabric mainly composed of hydrophilic fibers, pulp fibers and synthetic fibers. The hydrophilic fiber used in the present invention is not particularly limited as long as it is hydrophilic, and examples thereof include regenerated cellulose fiber and cotton.

The length of the hydrophilic fiber is preferably 4 to 20 mm. When the length of the fiber is less than 4 mm, the hydrophilic fiber has too weak entanglement between the fibers, so that sufficient sheet strength cannot be obtained. Conversely, if the fiber length exceeds 20 mm, the entanglement of the hydrophilic fibers becomes too strong, and it becomes difficult to disintegrate the web structure of the nonwoven fabric in a large amount of water flow. The fineness is
0.5 to 10 denier is preferred. If it exceeds 10 denier, the fibers themselves become hard, and the fibers become difficult to move due to the high-pressure water jet flow, so that the entanglement of the fibers becomes difficult and the flexibility of the nonwoven fabric is impaired. Fineness is 0.5
Fibers of less than denier are difficult to manufacture and are not suitable.

As the pulp fiber, it is preferable to use a chemical pulp or a waste paper pulp obtained by digesting wood such as softwood or hardwood by the kraft method, the soda method, the polysulfite method or the like, alone or in combination.

In order to prepare the topsheet of the present invention,
First, a web composed of hydrophilic fibers and pulp fibers is prepared. The method of laminating the pulp fibers and the hydrophilic fibers for making the web is a wet papermaking method, a card method, an airlaid method,
There is no particular limitation as long as a uniform web can be formed. The basis weight of the web is a matter that can be arbitrarily determined, but is 15 to 200.
g / m ² by weight, more preferably 20 to 60 g / m ^2. When the basis weight is less than 15 g / m ² , the strength of the web becomes weak, and the sheet cannot be obtained because it cannot withstand the high-pressure water jet flow. Conversely, if the grammage exceeds 200 g / m ² , the obtained web becomes hard and unsuitable for use as a surface sheet for sanitary articles.

The mixing ratio of the fibers is from 40 to 85 hydrophilic fibers.
% By weight and 15 to 60% by weight of pulp fibers. If the blending ratio of the hydrophilic fibers exceeds 85% by weight, the amount of the pulp fibers that form bonds by hydrogen bonding between the fibers and play a role as an adhesive decreases, and the loosening of the entanglement of the hydrophilic fibers cannot be prevented. A stable sheet cannot be obtained.
Conversely, if the proportion of the hydrophilic fibers is less than 40% by weight, the amount of entanglement of the hydrophilic fibers decreases, and the sheet strength of the obtained water-disintegrable nonwoven fabric becomes weak, which is not suitable.

The synthetic fibers used in the synthetic fiber non-woven fabric used in the present invention include polyolefin fibers such as polypropylene, polyethylene and polystyrene, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate and copolymers thereof, and nylon 6 Polyamide-based fibers such as nylon 66, polyvinyl alcohol-based fibers, polyacrylonitrile-based fibers such as acrylic fibers, polylactic acid, biodegradable fibers such as fatty acid polyesters, and the like. Used as a mixture. The length of the synthetic fiber may be a continuous fiber or a discontinuous fiber, as long as it is laminated to form a sheet. Synthetic fiber non-woven fabrics are first wet-laid,
By card method, air laid method, spun bond method, etc.
The synthetic fibers are laminated to form a uniform web. Next, in order to fix the fibers to form a sheet, a needle punching method, an adhesive application method, a high-pressure water jet treatment method, a hot embossing method, or the like may be used alone or in combination, and there is no particular limitation.

The basis weight of the synthetic fiber nonwoven fabric thus obtained can be arbitrarily determined.
00 g / m ² is preferred. When the grammage is less than 8 g / m ² , the web is not uniform because it is not preferable. Conversely, when the grammage exceeds 100 g / m ² , the nonwoven fabric becomes slightly hard, and gathers on which a stretchable elastic body and the like are arranged may not be formed. It becomes hard and unsuitable.

[0020]

EXAMPLES Hereinafter, the surface sheet of the absorbent article of the present invention and the disposable diaper using the same will be described more specifically with reference to examples, but of course, the present invention is not limited to these examples. .

FIG. 1 is a perspective view of the topsheet of the absorbent article of the present invention, and FIGS. 2 and 3 are cross-sectional views of the topsheet of the absorbent article of the present invention. FIG. 4 is a perspective view of a disposable diaper using the topsheet of the absorbent article of the present invention, and FIG. 5 is a sectional view of a disposable diaper using the topsheet of the absorbent article of the present invention. Is shown.

Reference numeral 1 denotes a liquid-permeable top sheet, 1a
Is a vertical center region, 1b is a first outer region, 1c is a second outer region, 1d is a third outer region, 2 is a folded line, 3 is an elastic elastic body, 4 is a cut line, and 5 is liquid impermeable. A back sheet, 6 is an absorber, 7 is a side flap, 8 is a tape fastener, and 9 is a three-dimensional gather.

In order to obtain the topsheet 1 of the absorbent article shown in FIGS. 1 and 2 of the present invention, first, a synthetic fiber nonwoven fabric folded in two at the folding line 2 is prepared. The position of the fold line 2 is located parallel to the flow direction of the synthetic fiber non-woven fabric, and may be at the center of the non-woven fabric, or may be shifted to the left or right.
Next, at least a part of both longitudinal edges of the web composed of the hydrophilic fiber and the pulp fiber is superimposed on the bi-folded synthetic fiber nonwoven fabric. At this time, it is preferable that the folded line 2 of the synthetic fiber nonwoven fabric be positioned inward of the web, and that the web be overlaid on the synthetic fiber nonwoven fabric.

The central portion of the web formed of the hydrophilic fiber and the pulp fiber, that is, the region where the synthetic fiber nonwoven fabric and the web do not overlap with each other is subjected to high-pressure water jet flow treatment to form a longitudinal central region 1a. Will be done. It is preferable that the width of the vertical central region 1a be 5 cm or more. When a nonwoven fabric having a width in the vertical center region 1a of less than 5 cm is used as the topsheet 1, the absorption region becomes narrow, and excrement leaks to the outside of the absorbent article during use. Further, in the region where the entire synthetic fiber nonwoven fabric present above the folding line 2 and the central longitudinal region 1a of the web are overlapped, the first outer region 1b is formed by performing a high-pressure water jet flow treatment. . Since the three-dimensional gathers 9 are formed by the first outer region 1b,
The width of the first outer region 1b is preferably 1 to 6 cm. If it is less than 1 cm, the height of the three-dimensional gathers 9 is too low, and the leakage prevention effect is poor. Conversely, if it is larger than 6 cm, the height of the three-dimensional gathers 9 is too high, resulting in poor mounting, and also poor leakage prevention effect.

In the present invention, a web made of a hydrophilic fiber and a pulp fiber is overlaid on a folded synthetic fiber nonwoven fabric, and then placed on a transfer conveyor made of a woven fabric such as a wire mesh, and the web is placed from above the web. A water jet flow treatment is performed so that a high-pressure water jet flow is jetted and passes through the synthetic fiber nonwoven fabric. The high-pressure water jet flow treatment uses the above-mentioned transfer conveyor, injects water at a high pressure of 10 to 250 kg / cm ² through a plurality of nozzles having nozzle holes with a fine diameter of 0.01 to 0.30 mm, It can be applied by moving the transfer conveyor at 5-150 m / min.

The high-pressure water jet impinges on the web and the synthetic fiber non-woven fabric, and then moves horizontally at the intersection of the yarns of the fabric, ie, at the knuckle where the weft and warp intersect. At this time, the hydrophilic fibers and the pulp fibers in the central region of the web are entangled and entangled with each other, are formed into a sheet, and the longitudinal central region 1a is formed. On the other hand, in the region where the web and the synthetic fiber nonwoven fabric overlap, the hydrophilic fiber and the pulp fiber in the web are entangled with the synthetic fiber nonwoven fabric, and the web and the synthetic fiber nonwoven fabric are integrated to form the first outer region 1b. At this time, the synthetic fiber nonwoven fabric existing above the folding line 2, that is, the synthetic fiber nonwoven fabric superimposed just below the web and the web are integrated. However, the integrated web and the synthetic fiber nonwoven are not integrated with the underlying synthetic fiber nonwoven. Therefore, the folding line 2
The synthetic fiber non-woven fabric existing below the diverges from the boundary between the longitudinal central region 1a and the first outer region 1b to form a second outer region 1c. As a result, a single composite nonwoven fabric including the vertical central region 1a, the first outer region 1b, and the second outer region is formed.

A stretchable elastic body 3 is disposed in an extended state on a side edge along the longitudinal direction of the first outer region 1b.
The elastic elastic body 3 is wrapped inside by bending the first outer region 1b. At this time, the first outer region 1b is separated from the diaper surface by the contraction of the elastic elastic body 3, and the three-dimensional gathers 9 are formed.

In order to obtain a sheet as shown in FIG. 3, at the time of performing the high-pressure water jet treatment, at least a part of the portion of the synthetic fiber nonwoven fabric existing above the folding line 2 and the hydrophilic fiber and the pulp fiber are used. The processing is performed after both side edges of the web are overlapped. The width of the portion where the synthetic fiber nonwoven fabric and the web are overlapped is preferably 0.5 cm or more. If it is less than 0.5 cm, the strength at the overlapped portion is weak, and the web and the synthetic fiber nonwoven fabric are not completely integrated. Also, the width of the overlapped part is
It may be symmetrical or asymmetrical. In the composite nonwoven fabric thus obtained, the longitudinal central region 1a is formed of a web made of hydrophilic fibers and pulp fibers, and the first outer regions 1b located on both side edges of the longitudinal central region 1a.
Is formed of a nonwoven fabric in which a hydrophilic fiber and a pulp fiber are entangled with a synthetic fiber nonwoven fabric. The third outer region 1d located outside the first outer region 1b is formed of a synthetic fiber non-woven fabric. It is formed of a synthetic fiber nonwoven fabric. As a result, the vertical center region 1a,
First outer region 1b, second outer region 1c, third outer region 1
Thus, one composite nonwoven fabric made of d is formed.

A stretchable elastic body 3 is provided in an extended state on a side edge along the longitudinal direction of the third outer region 1d,
The elastic elastic body 3 is wrapped inside by bending the third outer region 1d. Therefore, the first outer region 1b and the third outer region 1d rise from the longitudinal central region 1a by the force of contraction from the elastic elastic body, and the three-dimensional gather 9 is formed. At this time, the total width of the first outer region 1b and the third outer region 1d is preferably 1 to 6 cm. If it is less than 1 cm, the height of the three-dimensional gathers 9 is too low, and the leakage prevention effect is poor. Conversely, if it is larger than 6 cm, the height of the three-dimensional gathers 9 is too high, resulting in poor mounting, and also poor leakage prevention effect.

The topsheet of the present invention represented by FIG. 2 or FIG. 3 has a plurality of properties as described below and can be suitably used for an absorbent article. The longitudinal center region 1a is a nonwoven fabric in which constituent hydrophilic fibers and pulp fibers are entangled, and has water-disintegrable properties. The nonwoven fabric obtained by entanglement without adhering the fibers has sufficient strength for use when wet with a small amount of water, but when immersed in a large amount of water for a long time, the entanglement of the fibers loosens, Collapse easily. The first outer region 1b is a nonwoven fabric in which a hydrophilic fiber and a pulp fiber are entangled with a synthetic fiber nonwoven fabric, and the nonwoven fabric itself has a slight water absorbing property. In other words, due to the presence of synthetic fibers without water absorption, hydrophilic fibers and pulp fibers having water absorption, they absorb a small amount of water, but do not absorb a large amount of water. Trace amounts of water can be absorbed.
For this reason, when used as the topsheet 1 or the three-dimensional gather 9, not only does the effect of preventing stuffiness increase, but also due to the presence of the synthetic fiber nonwoven fabric, the effect of increasing excretion leakage and exudation increases.

The second outer region 1c is formed of a synthetic fiber non-woven fabric, and is preferably hydrophobic. When the nonwoven fabric of this portion is used as the topsheet 1 on the side flaps 7, not only the feeling of salat is good but also the effect of excrement leakage and seepage is enhanced. The third outer region 1d is formed of a synthetic fiber nonwoven fabric, and is preferably hydrophobic. The nonwoven fabric in this portion is particularly preferably used as the three-dimensional gather 9, and the three-dimensional gather 9 that is effective in excrement leakage and exudation can be formed. Thus, the topsheet 1 of the present invention is a composite nonwoven fabric having four properties.

Further, at both side edges of the vertical central region 1a,
In addition, the cut line 4 may be formed along the longitudinal direction of a portion located inside the first outer region 1b. The shape of the cut line 4 may be discontinuously arranged and may be a dot shape, a linear shape, or the like, as long as it does not break when used as the top sheet 1 of the absorbent article and can be easily broken at the time of disposal.

FIGS. 4 and 5 show a disposable diaper using the topsheet 1 of the absorbent article of the present invention. It has a top sheet 1 and a back sheet 5 of the present invention, an absorber 6 disposed therebetween, and side flaps 7 extending outward from both longitudinal edges of the absorber 6. The side flap 7 is formed by laminating the top sheet 1 and the back sheet 5, and furthermore, the elastic elastic body 3 is disposed between the two sheets. Tape fasteners 8 are attached to both lateral edges of the back side absorbent body 6, and are used when worn. A longitudinal central region 1a of the topsheet 1 is present on the upper surface of the absorber 6, and three-dimensional gathers 9 are formed by the first outer region 1b and the third outer region 1d of the topsheet 1 near both edges of the absorber 6. The three-dimensional gathers 9 are raised and separated from the diaper surface by the contraction of the elastic elastic body 3 arranged in the third outer region. Further, a second outer region 1c of the topsheet 1 exists on the upper surface of the side flap 7. At this time, it is preferable that the longitudinal center region 1a of the topsheet 1 is very weakly or not bonded to the absorber 6. In addition, a dotted cut line 4 is formed on both side edges of the longitudinal center region 1a of the topsheet 1.
Are formed.

In such a disposable diaper, since the center region 1a in the longitudinal direction of the topsheet 1 is a hydrophilic fiber, it absorbs water-containing excrement such as loose stool well. In addition, since the three-dimensional gathers 9 are formed by the first outer region 1b and the third outer region 1d, it is effective in preventing excretion from leaking. It can be absorbed and is also effective in preventing stuffiness. In addition, since the elastic elastic body 3 is arranged in the third outer region that is a soft sheet, the texture of the formed three-dimensional gather 9 is improved. In addition, since the second outer region 1c is water repellent, it is effective to prevent exudation from seeping out and leaking by disposing the second outer region 1c on the side flap 7 of the disposable diaper.

After use of the disposable diaper, the central longitudinal region 1a of the topsheet 1 can be easily broken along the cut line 4 and can be separated from the diaper body. Since the vertical central region 1a of the separated topsheet 1 is a non-woven fabric having water disintegration properties, the vertical central region 1a of the topsheet 1 contaminated with the excrement can be flushed to the flush toilet.

[0036]

As described above, the topsheet of the absorbent article of the present invention has a three-dimensional gather, and the water-disintegratable nonwoven fabric located in the central region in the longitudinal direction of the nonwoven fabric is easily separated from the synthetic fiber nonwoven fabric. The separated water-disintegratable nonwoven fabric can maintain the sheet shape when wet with a liquid, and can be easily and quickly disintegrated into a fibrous form when immersed in a large amount of water. For this reason, in the absorbent article using the topsheet of the present invention, the topsheet contaminated by excrement at the time of disposal can be separated from the main body of the absorbent article, discarded in a flush toilet, and disposed of sanitarily. Became possible.

[Brief description of the drawings]

FIG. 1 shows a perspective view of a top sheet of an absorbent article of the present invention.

FIG. 2 is a cross-sectional view taken along line xx ′ of the topsheet of FIG.

FIG. 3 is a cross-sectional view of the topsheet of FIG. 1 taken along line xx ′, showing another embodiment different from FIG. 2;

FIG. 4 is a perspective view of a disposable diaper using the topsheet of the absorbent article of the present invention.

5 is a sectional view taken along line yy 'of the disposable diaper of FIG.

[Explanation of symbols]

 1. Liquid permeable surface sheet 1a. Longitudinal central area 1b. First outer area 1c. Second outer area 1d. Third outer area 2. Fold line 3. Elastic elastic body 4. Cut line 5. Liquid impermeable Back sheet 6. Absorber 7. Side flap 8. Tape fastener 9. Solid gather

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI A61F 13/18 310Z

Claims (6)

[Claims] 1. A topsheet of an absorbent article comprising a nonwoven fabric mainly composed of hydrophilic fibers, pulp fibers and synthetic fibers, wherein a longitudinal central region of said topsheet is formed of hydrophilic fibers and pulp fibers. A first outer region made of a hydrophilic fiber, a pulp fiber, and a synthetic fiber is formed outside both side edges of a longitudinal center region of the topsheet, and a longitudinal direction of the first outer region of the topsheet. A stretchable elastic body is arranged in an extended state on a side edge along the line, and a second outer region branched from a boundary between the central region and the first outer region and made of synthetic fiber is formed. A surface sheet for an absorbent article, characterized by that: 2. Outside the first outer region of the topsheet,
A third outer region made of a synthetic fiber is formed, and a stretchable elastic body is disposed in a stretched state on a side edge along a longitudinal direction of the third outer region.
A surface sheet of the absorbent article according to the above. 3. The topsheet of an absorbent article according to claim 1, wherein cut lines are formed at both side edges of a central region in the longitudinal direction of the topsheet. 4. A synthetic fiber nonwoven fabric formed by mixing a hydrophilic fiber having a fiber length of 4 to 20 mm and pulp fiber to form a web, and bending both side edges of the web in a longitudinal direction and a bending line along the longitudinal direction. After overlapping the portions existing above the folding line, the web and the synthetic fiber nonwoven fabric are placed on a transfer conveyor made of mesh, and then a high-pressure water jet stream is jetted onto the web and the synthetic fiber nonwoven fabric. The fibers are entangled with each other, and the web and the synthetic fiber non-woven fabric are integrated and dried to form a sheet.Furthermore, the web and the synthetic fiber non-woven fabric are overlapped on a side edge along a longitudinal direction of the overlapped portion. A surface of the absorbent article, wherein a stretchable elastic body is disposed in an extended state, and the overlapped portion is bent so as to wrap the stretchable elastic body inside. Sheet manufacturing method. 5. A longitudinal portion of the web is overlapped with at least a portion of the portion of the synthetic fiber nonwoven fabric which is bent at the bending line along the longitudinal direction and which includes at least a part of the portion present above the bending line. Thereafter, a high-pressure water jet stream is jetted to form a sheet, which is then dried to form a sheet. Further, an elastic elastic body is disposed in an extended state on a side edge along the longitudinal direction of the synthetic fiber nonwoven fabric, and the elastic elastic The method for producing a topsheet of an absorbent article according to claim 4, wherein the synthetic fiber nonwoven fabric is bent so as to wrap the body inside. 6. The surface sheet for an absorbent article according to claim 4, further comprising a step of making a cut line in a portion of the web adjacent to the overlapping portion of the web and the synthetic fiber nonwoven fabric. Manufacturing method.