JPH11285513A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorptive article such as a disposable diaper which is excellent in leakage preventing property form its side parts and excellent in wearing easiness. SOLUTION: The absorptive article 1 is provided with a top sheet 2, a back sheet and an absorber 4. Sheets 51 for forming gathers are arranged on both right and left sides to form a pair of stereoscopic gathers 5. The absorber 4 consists of cellulosic fiber and highly absorbable polymer and divided into a center part 4a of a large thickness and the side parts 4b, which are positioned on both of the right/left sides of the part 4a and are small in thickness compared with the part 4a. The part 4a contains highly absorptive polymer by high basis weight compared with the parts 4b and bulky nonwoven fabric is arranged between the top sheet 2 and the absorber 4. The sheet 51 is fixed to the top sheet 2 at a fixing part positioned longer then 3 mm away from the bulky nonwoven fabric.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an absorbent article such as a disposable diaper excellent in leak prevention performance.

[0002]

2. Description of the Related Art Conventionally, a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets have been provided. Absorbent articles such as disposable diapers having a pair of three-dimensional gathers formed by disposing a three-dimensional gather forming sheet on both sides are widely used.

[0003] However, conventional absorbent articles are insufficient in terms of leakage prevention from the crotch side, and various proposals have been made to improve leakage prevention.

For example, Japanese Patent No. 2565942 proposes a disposable diaper in which an impermeable side sheet is provided on the side of an absorber. However, in the disposable diaper according to this proposal, since the thickness and rigidity are constant in the width direction of the absorber, resistance is generated particularly at the crotch portion, and the wearability is poor, and it is difficult to fold the diaper and pack it compactly. In addition, they have not yet had sufficient leakage preventing properties from the side portions. Also, Japanese Patent Application Laid-Open No. 61-602 proposes a disposable diaper in which the central portion in the width direction of the absorber has a high density, and Japanese Patent No. 2633837 discloses a highly absorbent polymer in the thickness direction. Disposable diapers having absorbers with different distributions of diapers have been proposed. However, even in the disposable diapers according to these proposals, the capacity at the central part in the width direction of the absorber cannot be increased, and absorption is inhibited due to densification, so that sufficient leakage prevention properties have not yet been obtained. In short, conventional disposable diapers do not have sufficient leakage prevention properties, and there has been a demand for development of absorbent articles that are more excellent in leakage prevention properties from side portions.

[0005] Accordingly, an object of the present invention is to provide an absorbent article such as a disposable diaper which is excellent in preventing leakage from the side portions and excellent in wearability.

[0006]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have found that the thickness of the absorber at the center in the width direction and the basis weight of the superabsorbent polymer are increased. It has been found that an absorbent article in which a bulky nonwoven fabric is disposed between an absorber and a top sheet and a sheet for forming a three-dimensional gather is fixed at a specific position can achieve the above object.

The present invention has been made based on the above findings, and comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets. In an absorbent article in which a three-dimensional gather forming sheet is disposed on both left and right sides to form a pair of three-dimensional gathers, the absorber has a main component of a cellulosic fiber and a highly absorbent polymer, and has a width direction. In, a thick central portion, and is divided into a lateral portion located on the left and right sides of the central portion and thinner than the central portion, the central portion is compared to the side portion A high non-woven fabric having a high basis weight and a high-absorbent polymer, a bulky nonwoven fabric disposed between the top sheet and the central portion of the absorber, and the three-dimensional gather forming sheet being at least 3 mm from the bulky nonwoven fabric. Fixation located at a distance In is fixed to the top sheet, it is intended to provide an absorbent article characterized by.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. FIG. 1 is a perspective view showing a disposable diaper as one form of the absorbent article of the present invention, and FIG.
-II is a sectional view.

As shown in FIG. 1, the disposable diaper 1 of this embodiment comprises a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorber 4 interposed between the sheets 2, 3. And a pair of three-dimensional gathers 5 is formed by disposing three-dimensional gather forming sheets 51 on both left and right sides.

The disposable diaper has a pair of fastening tapes 6, 6 on both sides in the width direction of the back portion B for fastening the abdominal portion A and the back portion B when the disposable diaper 1 is mounted. 'Has been arranged. On the surface of the back sheet 3 at the abdominal part A of the disposable diaper 1, a landing tape (not shown) as a fastening part of the fastening tape 6, 6 'is provided. 6 'is configured to be fixed to the landing tape.

The absorber 4 has a rectangular shape, and the top sheet 2 is arranged so as to cover the surface and side surfaces of the absorber 4 and is fixedly joined to the back sheet 3 on the side of the absorber 4. . A waist elastic member 71 and a leg elastic member 81 are arranged on the waist 7 on the abdomen and the back and the left and right legs 8 located around the absorber 4. Then, the waist elastic member 71 and the leg elastic member 81 contract in a free state, and form a waist gather and a leg gather at the waist and the crotch of the wearer as shown in FIG. 7, 7 and the crotch C can be fitted.

To explain each member constituting the disposable diaper 1, the top sheet 2 is preferably a liquid-permeable sheet that allows excrement to pass through the absorbent body 4, and has a feeling similar to underwear. As such a liquid permeable sheet, for example, a woven fabric, a nonwoven fabric, a porous film and the like are preferably mentioned. In addition, a method of applying a hydrophobic compound such as a silicone oil agent or paraffin wax to the periphery of the top sheet 2 or a method of applying a hydrophilic compound such as an alkyl phosphate ester on the entire surface in advance and washing the periphery with warm water, etc. Accordingly, a material in which the periphery of the top sheet 2 is subjected to a water-repellent treatment to prevent leakage due to bleeding of urine or the like at the periphery can also be preferably used. In order to absorb high-viscosity excrement such as loose stool and menstrual blood, nonwoven fabric and woven fabric may be perforated.

The back sheet 3 is preferably a moisture-permeable liquid-impermeable sheet that does not allow liquid to permeate but allows vapor to permeate and has a feeling similar to underwear. The liquid impermeable sheet is obtained, for example, by adding a filler to a thermoplastic resin and stretching the same. In particular, as the liquid-impermeable sheet, a porous film having moisture permeability, a non-porous moisture-permeable sheet such as some ester-based or urethane-based sheets, and a composite material of the porous film and a nonwoven fabric are preferable. Can be used.

As the waist elastic member 71 and the leg elastic member 81, thread rubber, flat rubber, film-type rubber, or film-like foamed polyurethane is preferably used.

Thus, in the disposable diaper 1 of the present embodiment, as shown in FIGS. 1 and 2, the absorbent body 4 is mainly composed of the cellulosic fiber 41 and the superabsorbent polymer 42 and has a widthwise direction. A thick central portion 4a and a central portion 4;
a, which is located on the left and right sides of the center portion 4a and is divided into side portions 4b having a smaller thickness than the center portion 4a.
b, which contains the superabsorbent polymer 42 with a higher basis weight than the bulky nonwoven fabric 9 between the top sheet 2 and the absorber 4.
The three-dimensional gather forming sheet 51 has a top sheet at a fixing portion 52 which is located at a distance of 3 mm or more, preferably 10 to 100 mm, more preferably 20 to 70 mm (L in FIG. 2) from the bulky nonwoven fabric. 2 is fixed.
If the thickness of the central portion 4a is smaller than that of the side portions 4b, the rigidity of the crotch portion where the force is concentrated is insufficient, so that the rate of occurrence of twisting and leakage increases. When the basis weight of the superabsorbent polymer 42 is lower in the central portion 4a than in the side portions 4b, the liquid cannot be concentrated and absorbed in the central portion in the width direction of the absorber, and the leakage also increases. If the position of the fixing portion is less than 3 mm from the bulky nonwoven fabric, the space created by the bulky nonwoven fabric and the sheet for forming a three-dimensional gather is narrow, and a sufficient liquid holding force is not generated.

The details will be described below. The central portion 4a and the side portions 4b are integrally formed, and are respectively formed over the entire region of the absorber 4 in the longitudinal direction. Central part 4a
Preferably has a width w1 of 10 to 150 mm.
More preferably, it is set to 0 to 100 mm. Further, the width w2 of the side portion 4b is preferably set to 10 to 100 mm, and more preferably set to 20 to 70 mm. Central part 4
If the width w1 of a is less than 10 mm, the effect of concentrating the liquid at the center and the effect of preventing kinks will not be sufficiently exhibited, and if it exceeds 150 mm, the fit of the crotch portion will be poor, which is not preferable. The width w2 of the side part 4b is less than 10 mm or 100 mm
When the value exceeds, the effect of central concentration of the liquid and the effect of preventing the liquid from being distorted are not sufficiently exhibited, which is not preferable. The thickness of the central portion 4a is preferably 0.5 to 20 mm,
The thickness of the side portion 4b is preferably set to 0.2 to 3 mm. Further, the thickness of the central portion 4a is set such that the thickness of the side portion 4b is 1
It is preferable that the thickness is set so that the ratio when the ratio is set to 1: 1.3 to 5.0. The thickness of the central portion 4a is 0.5
If it is less than mm, the ability to stock a large amount of urine, menstrual blood, etc. is not sufficient, and if it exceeds 20 mm, it becomes uncomfortable and is not preferable. If the thickness of the side portion 4b is less than 0.2 mm, the capacity as an absorber is insufficient, and if it exceeds 3 mm, a compact absorbent article is not obtained, which is not preferable.

The basis weight of the superabsorbent polymer 42 in the central portion 4a is preferably 50 to 500 g / m ² ,
More preferably, it is set to 300 g / m ² . Further, the basis weight of the superabsorbent polymer 42 in the side portion 4b is 0 to 200 g.
It is preferable to be / m ^2, even more preferably a 0~100g / m ^2. That is, the side portion 4b may not contain the superabsorbent polymer 42. When the basis weight of the superabsorbent polymer in the central portion 4a is less than 50 g / m ² , the capacity of the absorber is indispensable, and when it exceeds 500 g / m ² , the polymer moves in the absorber, It is not preferable because the water-absorbing polymer does not work efficiently and wastes. The ratio of the basis weight of the cellulosic fiber 42 in the side portion 4b to the basis weight of the cellulosic fiber 42 in the central portion 4a (the basis weight of the cellulosic fiber in the side portion 4b: the basis weight of the cellulosic fiber in the central portion 4a). ) Is preferably from 1: 1.3 to 5.0, more preferably from 1: 1.3 to 3.0.

The bulky nonwoven fabric 9 has the same width as the width of the central portion 4a, and is disposed on the central portion 4a.
It is preferably 5 mm.

The three-dimensional gather forming sheet 51 is
The side portion of the disposable diaper is adhered to the back sheet 3 using an adhesive, and the leg portion elastic member is sandwiched and fixed between the back sheet 3 and the three-dimensional gather forming sheet 51 in an extended state. And it is fixed to the top sheet 2 at the fixing portion 52. Also, the fixing part 52
Is formed by bonding a top sheet and a three-dimensional gather forming sheet via an adhesive. An elastic member (a string-like rubber member) is arranged on a free edge portion of the three-dimensional gather forming sheet to form a three-dimensional gather 5.

The cellulosic fibers used as a main component in the absorbent 4 include pulp materials such as wood pulp, regenerated cellulosic fibers such as rayon, and treated fibers such as CM pulp.の も の 25 mm is preferred. Particularly, a pulp material is preferable.
The basis weight of the cellulosic fiber 41 is 50 to 500 g / m ^2.
And more preferably 100 to 300 g / m ² .

As the high-absorbency polymer 42 used as a main component, a polymer having a liquid absorption of 20 w / w or more can be preferably used. In addition, the superabsorbent polymer 42 has a cross-sectional area of 4.91 with 0.5 g.
cm ² were filled with cylindrical physiological saline (internal diameter 25 mm), the saline by the high-absorbent polymer is swollen to reach saturation, swollen saline after the high absorbent polymer 42 had settled the It is desirable that the liquid passage time when passing 50 ml is 20 seconds or less.

The liquid passage time is a measure of the occurrence of the gel blocking phenomenon of the superabsorbent polymer 42. When the liquid passage time exceeds 20 seconds, the amount of the superabsorbent polymer 42 used is reduced by the absorption. If the total weight of the body 4 is 45% by weight or more, a gel blocking phenomenon occurs, and the absorption performance of the superabsorbent polymer is impaired. The shorter the liquid passage time is, the better, but a practical range is 2 to 20.
Seconds are preferred, and 2 to 15 seconds are more preferred.

Examples of the superabsorbent polymer 42 include, specifically, sodium polyacrylate and acrylic acid-
Powders such as vinyl alcohol copolymer, crosslinked sodium polyacrylate, starch-acrylic acid graft polymer, isobutylene-maleic anhydride copolymer or a saponified product thereof, potassium polyacrylate, and cesium polyacrylate are preferred. . In addition, the above-mentioned absorber may consist only of the above-mentioned main components, and may add suitably the ingredient used for the absorber of other usual absorbent articles.

The absorbent body 4 having the above-described structure can be manufactured according to a conventional method. In the manufacturing process, a step of adding water can be performed. By adding water in advance in this way, the shape of the absorber at the time of drying and at the time of absorbing body fluid can be stably maintained. The amount of water added at this time is desirably less than 30 parts by weight based on 100 parts by weight of the absorber. When water is added in this way, it is desirable that the water activity value of the absorber at the time of equilibrium is less than 0.6. If the water activity value exceeds 0.6, not only the occurrence of mold is concerned, but also the absorber becomes too hard and the texture becomes poor. For the other steps, a method known per se can be adopted without any particular limitation.

The bulky nonwoven fabric 9 is, for example, a layer formed by stacking nonwoven fabrics having a high porosity or the like in a sheet shape, and serves as a temporary stock layer for excrement and an isolation layer for isolating the excrement from the skin. Thereby, the absorption performance (quick absorption and liquid return resistance) can be improved.

Examples of the bulky nonwoven fabric 9 include cellulosic fibers, modified cellulosic fibers, synthetic fibers, and mixtures of two or more of these. Examples of the cellulosic fibers include natural fibers such as wood pulp and cotton, and cellulosic chemical fibers such as viscose rayon and acetate. Examples of the synthetic fibers include polyethylene fibers, polypropylene fibers, polyester fibers, polyamide fibers, polyacrylonitrile fibers, polyvinyl alcohol fibers, and a composite of at least two of these synthetic fibers in a core-sheath type or the like. And fibers obtained by mixing at least two of these synthetic fibers. Among these fibrous base materials, the surface of the synthetic fiber is preferably hydrophilized by corona treatment, plasma treatment, application of a hydrophilic agent for a surfactant, or the like.

In particular, the bulky nonwoven fabric 9 has a porosity of
Nonwoven fabric made of high synthetic fiber is stacked in a sheet shape
Are preferred. The nonwoven fabric at this time has a basis weight of 15 to 70 g.
/ M ^Two, Preferably 20 to 60 g / m^TwoHaving a non-woven fabric
Fibers used for polyethylene, polypropylene,
Fiber diameter of PET, rayon, etc. 3-10d, length 38-7
5 mm is preferred. Also, pulp fiber and binder
-For dry pulp sheets mainly composed of ingredients
May be. Furthermore, porous films and foams (urethane
System, olefin system) can be used.

Further, as a material for forming the above-mentioned three-dimensional gather forming sheet, a generally used hydrophobic nonwoven fabric or the like can be used.

Since the absorbent article of this embodiment is configured as described above, the absorbed liquid concentrates on the central portion 4a, so that the absorbent article has a high ability to prevent leakage from the side end portions of the absorbent article, Since the side portion of the article is soft, the wearability is good and the diaper can be easily folded. In addition, since it is possible to impart appropriate rigidity (strength) to the crotch portion while being a thin absorber (an absorber having a high polymer concentration), leakage due to kinks is prevented. Further, since the bulky nonwoven fabric 9 is provided, the liquid once absorbed can be separated from the skin, and the liquid return prevention property is excellent. Furthermore, even if a large amount of excreted liquid is absorbed, the absorber 4 is three-dimensionally formed and the three-dimensional gathers 5 are located at specific positions, so that an effective liquid storage area can be secured, and leakage prevention is further improved. You.

The absorbent article of the present embodiment can be manufactured as follows. The central part 4a is thick and the central part 4a
The absorbent body 4 is manufactured so that the basis weight of the superabsorbent polymer 42 becomes large, and the respective members are arranged in the form shown in FIG.

The absorbent article of the present invention is preferably applied to disposable diapers, and also to other absorbent articles such as sanitary napkins, incontinence pads and breast milk pads, diapers for pets, sheets for pets and the like. Is also good.

Next, another embodiment of the absorbent used in the absorbent article of the present invention will be described with reference to FIG.
Here, FIG. 3 is a cross-sectional view in the width direction showing an absorbent body according to another embodiment of the absorbent article of the present invention.

In this embodiment, the absorber 4 includes a flat lower layer 40a and the lower layer 40a placed on the lower layer 40a.
It has a three-layer structure including an intermediate layer 40b having a smaller width and an upper layer 40c having substantially the same width as the intermediate layer 40b placed on the intermediate layer 40b.
The intermediate layer 40b is formed by a portion on which the intermediate layer 40b and the upper layer 40c are placed. The intermediate layer 40b has a higher content of the superabsorbent polymer than the lower layer 40a and the upper layer 40c. Note that the absorbent body of this embodiment is the same as the embodiment shown in FIGS. 1 and 2 described above (can be used for an absorbent article having a configuration, for example, the position of the fixing portion 52, the three-dimensional gather forming sheet, the top sheet, and the back. The relationship with the sheet, the arrangement position of the bulky nonwoven fabric 9, the width and thickness of the central portion 4a, and the width and thickness of the side portions 4b are appropriately applied to the same absorbent article as the absorbent article shown in FIGS. Is done.

In the present embodiment, the lower layer 40a is formed by laminating the cellulosic fibers 41 on a mount in a layered manner.
The intermediate layer 40b is formed by laminating a mixed material obtained by mixing the cellulosic fiber 41 and the superabsorbent polymer 42 on the lower layer, and the upper layer 40c is formed by laminating the cellulosic fiber 41 on the intermediate layer 40b. It is formed by lamination. That is,
In the present embodiment, the superabsorbent polymer 4 is provided on the side portions 4b.
2 is not blended. The thickness of the lower layer 40a is
The thickness is preferably 0.2 to 3 mm, the layer thickness of the intermediate layer 40b is preferably 0.5 to 20 mm, and the layer thickness of the upper layer 40c is preferably 0.2 to 3 mm.

It should be noted that the absorbent article of the present invention is not limited to the above-described example, and can be variously modified without departing from the spirit of the present invention. For example, the central portion 4a may not be provided over the entire region in the longitudinal direction of the absorber. That is, as shown in FIG. 4 (A), the diaper is provided only at the crotch portion, as shown in FIG. 4 (A), at one of the lengthwise front end and the rear end of the diaper, or as shown in FIG. The diaper may be provided at both the front end and the rear end in the length direction. Further, FIG. 4 (C)
As shown in the figure, the central portion 4a may be provided in a plurality of blocks. In this case, since a groove is formed between the central portions 4a, 4a, a fold is easily formed at the center, and the body is formed. Fit to fit increases. Further, the arrangement shape of the bulky nonwoven fabric can be made similar.

[0036]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto.

In the following examples, each evaluation was performed according to the following evaluation method. -Evaluation method-[Liquid spreading] 40 g of artificial urine was repeatedly injected into the center of the diaper four times at 10-minute intervals. The state of liquid spreading after completion of the injection treatment was observed, and the liquid spreading property was evaluated according to the following criteria. Small: The liquid concentrates at the center of the diaper and hardly reaches the end of the absorber. Middle: The liquid tends to concentrate at the center of the diaper, but reaches the end of the absorber by repeated absorption. Large: The liquid easily diffuses and reaches the end of the absorber.
(Based on the level of commercially available diapers.) [Wearability] Have the diapers obtained (10 persons) wear the obtained diapers and observe the diaper condition (especially the crotch area) immediately after wearing and 1 hour after wearing. The mother's impression was evaluated, and the evaluation was performed based on the evaluation according to the following criteria. The criteria are as follows. ：: There is little twisting and looseness, and it fits well on the thigh. Δ: There is no twist, but lacks fit to the thigh. X: Twisting or looseness occurs.

[Liquid return] 100 × 100c on diaper surface
Over an area of m, 150 g of artificial urine was injected (a rectangular parallelepiped cylinder of 100 × 100 mm was placed on the absorber and injected therein). Ten minutes later, 20 pieces of filter paper cut into 100 × 100 mm were placed, and a load of 3.43 kPs was applied for 2 minutes.
The amount of artificial urine absorbed by the filter paper was measured as a liquid return amount. When the amount of liquid returned to the filter paper was 1.0 g or less, it was judged as "small liquid return", and when it exceeded 1.0 g, it was judged as "large liquid return". [Leakage rate] For each of the disposable diapers of Examples 1 to 5 and Comparative Examples 1 to 4, a total of 2 for 20 general monitors
A use test of 00 sheets was conducted, and the ratio of diapers having urine leakage to all diapers was determined.

[Examples 1 to 3] A fibrillated pulp material and a superabsorbent polymer were laminated on a tissue having a basis weight of 15 g / m ² and then wrapped with the tissue. Absorbents each having a part width, a pulp material and a basis weight of the superabsorbent polymer were obtained. A non-woven fabric having a basis weight of 30 g / m ² made of “ESC5d” (trade name, manufactured by Chisso) fiber as a bulky non-woven fabric was applied to the obtained absorbent, and the non-woven fabric was 100 mm wide.
In addition, a nonwoven fabric made of polyethylene fibers having a basis weight of 25 g / m ² is used as the top sheet, a polyethylene sheet is used as the back sheet, and a spunbonded nonwoven fabric made of polyethylene is used as the three-dimensional gather forming sheet (basis weight 22 g / m2). ² ) was used to obtain a disposable diaper as the absorbent article of the present invention shown in FIGS. 1 and 2 (in Example 1, the bulky nonwoven fabric was larger than the width from the central portion. 2 is slightly different).

Example 4 Basis weight 15 g / m^TwoThe Tissi
The defibrated pulp fiber is weighed 50 g / m ^TwoMultiply by
It was woven to obtain the lower layer. Pulp fibers defibrated on this lower layer
Uniform 60 parts by weight of fiber and 100 parts by weight of superabsorbent polymer
The weight of the mixture is 100mm in width and the entire weight of the absorber
400g / m^TwoTo obtain an intermediate layer. Furthermore, the intermediate
The pulp fiber defibrated on the layer has a basis weight of 30 g / m.^TwoAnd
Laminated over the entire length of the absorber with a width of 100 mm to form an upper layer
Then, an absorber having the form shown in FIG. 3 was obtained. The obtained absorber
Except for using, the embodiment shown in FIG.
I got a disposable diaper.

Example 5 The upper layer and the intermediate layer in Example 4 were placed at a position 100 mm from the front end of the absorber with a length of 20 mm.
0 mm, the center is 200 mm in length, 100 mm apart from the front end of the absorber and 60 mm from the rear of the absorber.
A disposable diaper shown in FIG. 1 was obtained in the same manner as in Example 4, except that the diapers were positioned at an interval of mm.

Comparative Example 1 A mixture of 60 parts by weight of defibrated pulp fibers and 100 parts by weight of a superabsorbent polymer was uniformly mixed on a tissue having a basis weight of 15 g / m ^{2 and} a basis weight of 250 g.
/ M ² and wrapped in the same tissue as used in Example 1 to obtain an absorbent. The obtained absorbent was made to have a basis weight of 30 g / m made of "ESC5d" fiber as a bulky nonwoven fabric.
^A disposable diaper was obtained in the same manner as in Example 1 except that the nonwoven fabric of No. 2 was arranged at the same width as the entire width of the absorber.

Comparative Example 2 The same procedure as in Example 2 was carried out except that the absorber prepared in Example 2 was compressed with a press roll so that the thickness in the width direction was constant (the density at the center was increased). ,
An absorbent for disposable diapers was obtained.

[Comparative Example 3] In the absorbent body prepared in Example 2, except that the fixing portion of the three-dimensional gather forming sheet was located at a position almost 0 mm from the side edge of the central portion, the same procedure as in Example 2 was performed. I got a disposable diaper.

Comparative Example 4 Example 2 was repeated except that no sublayer was provided in the absorber prepared in Example 2.
In the same manner as described above, a disposable diaper absorbent was obtained.

[0046]

[Table 1]

[0047]

As described above, the absorbent article of the present invention is excellent in prevention of leakage from the side portions and excellent in wearability. Specifically, the following effects are obtained. 1. Since the excreted liquid concentrates on the central part of the absorber, leakage from the side end of the absorbent article is prevented. 2. The side portions are soft, have excellent wearability, and the absorbent article can be easily folded and can be individually packaged in a compact manner. 3. Even a thin absorber (having a high concentration of a superabsorbent polymer) can provide an appropriate rigidity (strength) to the crotch part and is excellent in preventing leakage due to kinks. 4. Since it has a bulky nonwoven fabric, the liquid can be separated from the skin, and is excellent in liquid return prevention. 5. Even if the excreted liquid becomes large and the excreted liquid is diffused, an effective liquid storage area can be secured because the absorber is three-dimensionally formed and the three-dimensional gathers are provided at specific positions.
Excellent leak prevention.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a disposable diaper as one mode of the absorbent article of the present invention.

FIG. 2 is a sectional view taken along the line II-II.

FIG. 3 is a cross-sectional view in the width direction showing an absorbent body according to another embodiment of the absorbent article of the present invention.

FIG. 4A, FIG. 4B and FIG.
It is a perspective view showing other forms of an absorptive article of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber 4a Central part 4b Side part 40a Lower layer 40b Intermediate layer 40c Upper layer 41 Pulp material 42 Superabsorbent polymer 43 Side edge 5 Solid gather 51 Solid gather forming sheet 52 Fixed part Reference Signs List 6 fastening tape 7 waist 71 waist elastic member 8 leg 81 leg elastic member 9 bulky nonwoven fabric

Claims (2)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets, and three-dimensional gather forming sheets are arranged on both left and right sides. In an absorbent article in which a pair of three-dimensional gathers is formed, the absorbent body includes a cellulose-based fiber and a superabsorbent polymer as main components, and has a thick central portion in a width direction thereof; It is located on both left and right sides and is divided into side portions having a smaller thickness than the center portion, and the center portion contains a high absorbent polymer with a higher basis weight than the side portions. A bulky nonwoven fabric is arranged between the top sheet and the central portion of the absorber; and the three-dimensional gather forming sheet is 3 mm from the bulky nonwoven fabric.
An absorbent article, wherein the absorbent article is fixed to the top sheet at a fixed portion located at a distance from the above. 2. The absorber according to claim 1, wherein the absorber is a flat lower layer, an intermediate layer mounted on the lower layer, the intermediate layer being narrower than the lower layer, and a width substantially equal to the intermediate layer mounted on the intermediate layer. 3 consisting of the upper layer
The central portion is formed by a portion where the intermediate layer and the upper layer are placed on the lower layer, and the intermediate layer has a higher absorption compared to the lower layer and the upper layer. 2. The absorbent article according to claim 1, wherein the content of the absorbent polymer is high.