JP2000254169A - Absorptive article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a absorptive article such as a throw-away diaper which has a property to sufficiently prevent leakage and reduces the amount of the component materials of the absorptive article to be used. SOLUTION: This absorptive article includes a liquid permeable front surface sheet 2, a liquid impermeable leakproof sheet and a liquid holdable absorber 4 and is formed with three-dimensional guards 6 by disposing sheet materials 61 for forming the three-dimensional guards on both right and left side marginal parts in the longitudinal direction of the absorber 4. The leakproof sheet is so deposition as to exist on both right and left side marginal parts on the front surface side of the absorber 4 in such a manner that both right and left side marginal parts in the longitudinal direction thereof cover both right and left side marginal parts of the absorber 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorbent article such as a disposable diaper which is excellent in leakage prevention, uses a small amount of constituent materials, and can be manufactured at low cost.

[0002]

2. Description of the Related Art Absorbent articles such as disposable diapers have been made more compact and more convenient to carry because of improvements in the structure and materials used. However, the weight of a package containing a plurality of absorbent articles is still quite heavy, sometimes exceeding 3 kg, and it is quite a burden for mothers and caregivers to hold such a package. Further, in order to obtain a sufficient leak-proof property in absorbent articles such as disposable diapers, Japanese Patent Application Laid-Open No.
As in the invention described in Japanese Patent No. 309940, there is a proposal for improving the leakage prevention property of the lower part of the absorber, but no particularly effective proposal has been found for preventing leakage from the side of the absorber. Also, as another proposal, it is common to arrange a member other than the absorber and the leak-proof sheet on the side of the absorber, so in a conventional disposable diaper, if the leakage prevention property is improved, the disposable diaper is disposable. It was common for diaper weight to increase.

[0003] In short, conventionally, there have been considered various configurations of disposable diapers in which the amount of materials used in the disposable diapers is reduced. However, the components are reduced to ensure sufficient leak-proofing properties, and furthermore, to improve the air permeability. At the present time, one that has added flexibility and has not been proposed yet.

[0004] Accordingly, an object of the present invention is to provide a sufficient leak-proof property and reduce the amount of constituent materials of an absorbent article.
An object of the present invention is to provide an absorbent article such as a disposable diaper.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a liquid-permeable top sheet, a liquid-impermeable leak-proof sheet, and a liquid-retentive absorber, and is provided on both left and right sides in the longitudinal direction of the absorber. In an absorbent article in which a sheet material for forming a three-dimensional guard is arranged to form a three-dimensional guard, the leak-proof sheet has the left and right side edges in the longitudinal direction covering the left and right side edges of the absorber. The above object has been achieved by providing an absorbent article which is arranged so as to be located on both left and right side edges on the surface side of the absorber.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the absorbent article of the present invention will be described in detail. As shown in FIGS. 1 and 2, a disposable diaper 1 as an absorbent article according to the first embodiment has a liquid-permeable top sheet 2, a liquid-impermeable leak-proof sheet 3, and a liquid-retentive absorber. The three-dimensional guard 6 is formed by arranging a sheet material 61 for forming a three-dimensional guard on the left and right side edges of the absorber 4 in the longitudinal direction. The disposable diaper 1 of the present embodiment is a so-called deployable disposable diaper in which fastening tapes 11 for fastening during use are arranged on both left and right side edges B1 and B2 of the back side portion B. And, at the time of use, a waist portion 8 located around the waist of the wearer and a leg portion 7 located around the legs.
Are provided with a waist elastic member 81 and a leg elastic member 71, respectively, to form a waist gather and a leg gather. A three-dimensional guard elastic member 64 is disposed at a free end 63 of the three-dimensional guard 6. Such a configuration is the same as a conventional deployable disposable diaper.

[0007] In the disposable diaper 1 of the present embodiment, the leak-proof sheet 3 is formed on both left and right side edges 3a in the longitudinal direction.
Are arranged so as to cover the left and right side edges 4 a of the absorber 4 and to be located on the left and right side edges on the surface side of the absorber 4.

More specifically, the three-dimensional guard 6 is formed such that the base end 60 is located on the inner side of the disposable diaper with respect to the side edge 4 a of the absorber 4. 3D guard 6
Is provided on the absorber 4, more preferably, over the entire longitudinal direction of the absorbent article. In a portion where the absorber 4 does not exist, that is, in the waist portion 8 of the abdominal portion A and the back portion B of the diaper, the entire surface of the sheet material 61 is
It is stuck to. The absorber 4 includes a main body 41 obtained by mixing an absorbent polymer with pulp, and a diffusion sheet 42 disposed on the upper surface of the main body 41.

The side edge 3a of the leakproof sheet 3 is located on the inner side of the disposable diaper with respect to the base end 60, and is sandwiched between the side edge of the topsheet 2 and the absorber 4. . The outer layer nonwoven fabric 5 is disposed on the back side of the leak-proof sheet 3, and both the outer layer nonwoven fabric 5 and the sheet material 61 extend outward from the side edge 4 a of the absorber 4 toward the outer side of the disposable diaper. Issued
The extended outer nonwoven fabric 5 and the sheet material 61 are laminated to form the leg portion 7 and thus the leg gather. That is, the leg elastic member 71 is held and fixed by the outer nonwoven fabric 5 and the sheet material 61. Further, the outer layer nonwoven fabric 5 has an hourglass shape in which a central portion is constricted, and forms a planar shape of a diaper. The absorber 4 whose back surface side and side edges are covered with the leak-proof sheet 3 is rectangular, and is disposed at the center of the outer layer nonwoven fabric 5. The topsheet 2 also has a rectangular shape, and extends outward from the diaper from both longitudinal edges of the absorber 4 and is laminated with the outer nonwoven fabric 5 to form a waist portion 8. For this reason, the waist elastic member 81 is held and fixed by the outer nonwoven fabric 5 and the topsheet 2.

The top sheet 2 is located on the front side of the leak-proof sheet 3 and its side edge 2a is located at the side edge 4a of the absorber 4.
The base end 60 is formed by fixing a sheet material 61 to the topsheet 2 so as not to be located outside the disposable diaper. In the present embodiment, the side edge 2a of the topsheet 2 is disposed so as to be located at substantially the same position as the side edge 4a of the absorber 4. In FIG. 2, for clarity of the base end 60, for convenience, the sheet material 61 is described as being fixed to the topsheet 2 only at the base end 60. Outside 60, the entire surface is preferably fixed to the topsheet 2 and the leakproof sheet 3. The position and distance in the above description are the position and distance when the disposable diaper is viewed in a plan view, respectively.

The fastening tape 11 is fixed to the outer layer nonwoven fabric 5 at a fixing portion 11a. In the present embodiment, as shown in FIG. 1, a reinforcing sheet 12 is provided for reinforcement. ing. Reinforcement sheet 1
Numeral 2 is sandwiched and fixed between the outer layer nonwoven fabric 5 and the sheet material 61 via an adhesive.

The material for forming each component of the disposable diaper of the present embodiment will be described. As the top sheet 2, the leak-proof sheet 3, and the fastening tape 11, those usually used for disposable diapers are not particularly limited. Can be used. The main body 41 of the absorber 4 is made of a mixture of ordinary pulp and a water-absorbing polymer. Examples of the water-absorbing polymer used in this case include paragraphs [0010], [0011], [0012] and [001] in JP-A-10-118117.
3] and paragraphs [0014], [0015], [0016] and [0] of the same publication.
[037] and the like, and these may be used in combination to further improve leakage prevention. When these are used in combination, the compounding ratio may be the one described in paragraph [0019] of the same publication. Also, in the absorber, if it is at a level that does not hinder the absorption performance, in order to stabilize the shape of the absorber,
A hydrophilic long fiber (rayon, cotton, polyvinyl alcohol fiber, wool, or the like) or a thermoplastic fiber may be appropriately mixed and used.

The sheet material 61 and / or the outer nonwoven fabric 5 each have a CD strength of 1000 cN / 5.
0 mm or more, preferably 1200 to 2000 c
More preferably, it is N / 50 mm. CD intensity 10
By setting the thickness to 00 cN / 50 mm or more, the fastening tape does not break from the base. Where CD
The strength is measured as described below. <CD strength> A test piece having a width of 50 mm in the flow direction (MD) of the raw material and a length of 150 mm in a direction (CD) perpendicular to the flow direction was cut out. The test piece was subjected to a tensile test using a Tensilon tensile tester (manufactured by Orientec Co., Ltd.) at a chuck distance of 50 mm and a tensile speed in the CD direction of 300 mm / min, and the strength at break was measured. Strength.

The sheet material 61 and / or the outer layer nonwoven fabric 5 preferably has a water pressure resistance of 30 mm or more.
More preferably, it is 0 mm or more. Water resistance 30mm
In this way, any excrement that has passed over the three-dimensional guard will not leak onto the sheet.

The material for forming the sheet material 61 and the outer layer nonwoven fabric 5 satisfying the above conditions is a heat roll nonwoven fabric, a spunbond nonwoven fabric, a spunbond-meltblown-spunbond (SMS), a spunbond-meltblown-meltblown. -Spunbond (SMM
S) and the like are preferably used. Thus, the sheet material 6
As the outer layer nonwoven fabric 1 and the outer layer nonwoven fabric 5, it is preferable to use a nonwoven material having air permeability (high air permeability). The basis weight of the sheet material 61 and the outer layer nonwoven fabric 5 are each, is preferably from 10 to 40 g / m ^2, and even more preferably 18~30g / m ^2. By setting the basis weight to 10 g / m ² or more, necessary strength and water pressure resistance can be exhibited, and 40 g / m ²
By doing the following, a flexible and lightweight diaper that does not require cost can be provided.

The sheet for reinforcement is not particularly limited, but the following sheets are preferably used.
For example, in addition to the above-mentioned heat roll nonwoven fabric, spunbond nonwoven fabric, SMS, SMMS, foams such as air-through nonwoven fabric or urethane foam, polyolefin, urethane film, paper and the like.

As the diffusion sheet 42, those commonly used for disposable diapers can be used without any particular limitation. Examples of particularly preferred diffusion sheets are paper and nonwoven fabric. In particular, when a nonwoven fabric is used, the constituent fibers preferably have a fineness of 1.5 to 10 d and a basis weight of 15 to 60 g / m ² , but can be appropriately selected. A sheet mixed with not only synthetic fibers but also rayon or cotton may be used.

Since the disposable diaper 1 of the present embodiment is configured as described above, the amount of constituent materials used can be reduced as compared with the conventional disposable diaper, and the leak-proof sheet is disposed as described above. As a result, it is also excellent in the prevention of leakage from the side portions, and is excellent in the prevention of leakage.

If the disposable diaper 1 of the present embodiment has the above-described configuration, it can be manufactured using a method used for manufacturing a conventional disposable diaper without any particular limitation.

Next, a disposable diaper according to another embodiment of the absorbent article of the present invention will be described in detail. In the following description, points different from the disposable diaper of the first embodiment will be particularly described. The points that are not described in detail are the same as those in the first embodiment, and the above description is appropriately applied.

In the disposable diaper 1 of the second embodiment shown in FIG. 3, the side edge 3a of the leak-proof sheet 3 is located on the outer side of the disposable diaper 1 than the base end 60.

In the disposable diaper 1 of the third embodiment shown in FIG. 4, the side edge 3a of the leak-proof sheet 3 is located on the side edge of the top sheet 2, and the side edge 3a of the leak-proof sheet 3 Is located on the outer side of the disposable diaper 1 than the base end 60.

In the disposable diaper 1 of the fourth embodiment shown in FIG. 5, the side edge 3a of the leak-proof sheet 3 is located on the side edge of the top sheet 2, and the side edge 3a of the leak-proof sheet 3 However, it is located on the inner side of the disposable diaper with respect to the base end 60. The distance between the side edge 3a of the leak-proof sheet 3 and the side edge 4a of the absorber 4 is not particularly limited, and the side edge 3a and the base end 6 of the leak-proof sheet 3 are not limited.
The distance between 0 and 0 is preferably 0 to 20 mm.

In the disposable diaper 1 according to the fifth embodiment shown in FIG. 6, only the sheet material 61 for forming the three-dimensional gathers extends outward from the side edge 4 a of the absorber 4. Are folded back so as to be pinched and fixed by the top sheet 2 and the leakage prevention sheet 3. Thus, the leg portion 7 is formed only of the sheet material 61. Except for this point, the third embodiment is the same as the first embodiment.

In the disposable diaper 1 of the sixth embodiment shown in FIG. 7, the sheet material 61 is folded back and the leg portion 7 is formed only of the sheet material 61 as in the fifth embodiment. The edge 61 a is arranged so as to be located on the side of the absorber 4 and on the back side of the leak-proof sheet 3. Except for this point, the third embodiment is the same as the third embodiment.

Although not shown, the three-dimensional guard 6 is not shown.
Is a form in which two or more bent portions are formed, and at the time of use, two or more pocket portions formed by the three-dimensional guard are arranged side by side on the surface side of the three-dimensional guard; A three-dimensional guard elastic member is provided between the base end and the free edge of the three-dimensional guard and at the free edge, and a plurality of three-dimensional guards are provided on the surface of the three-dimensional guard by the three-dimensional guard. A form in which a pocket portion is formed may be employed. By adopting the above-mentioned configuration, the leakage prevention effect can be further enhanced. Specifically, even if the excrement exceeds the three-dimensional guard, the excrement is collected by these pocket portions, and leakage from the leg portion can be effectively prevented. Further, the sheet material 61 may be folded outward from the base end 60 inside the disposable diaper and fixed at both longitudinal ends of the disposable diaper. In this case, the three-dimensional guard 6 has a U-shaped shape in which the bent portion is located inside the disposable diaper. Further, after being turned outward in this way, it may be turned further inward. In this case, the three-dimensional guard 6 becomes Z-shaped. If you do these things,
Since the three-dimensional guard stands up satisfactorily, the height of the three-dimensional guard at the time of use is maintained, and leakage prevention is improved.

In the above-described embodiment, the deployment type disposable diaper has been described as an example. However, the present invention is applicable to a pants type disposable diaper, a sanitary napkin, an incontinence pad, and the like. In the above-described embodiment, an example in which the leg elastic members are disposed has been described. However, the leg elastic members need not be provided. Further, although not shown, the leg elastic member may be arranged on the back side (back sheet side) of the side edge of the absorber, and may be fixedly held between the leak-proof sheet and the outer nonwoven fabric.

[0028]

As described above, the absorbent article of the present invention has a sufficient leak-proof property, is reduced in the amount of material used for the absorbent article, and is compact and lightweight.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a disposable diaper as an absorbent article according to the present invention.

FIG. 2 is a sectional view schematically showing a section taken along line XX of FIG. 1;

FIG. 3 is a sectional view (corresponding to FIG. 2) schematically showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view (corresponding to FIG. 2) schematically showing a third embodiment of the present invention.

FIG. 5 is a cross-sectional view (corresponding to FIG. 2) schematically showing a fourth embodiment of the present invention.

FIG. 6 is a sectional view (corresponding to FIG. 2) schematically showing a fifth embodiment of the present invention.

FIG. 7 is a cross-sectional view (corresponding to FIG. 2) schematically showing a sixth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 11 Fastening tape 12 Reinforcement sheet 2 Top sheet 3 Leak-proof sheet 4 Absorber 41 Main body 42 Diffusion sheet 5 Outer nonwoven fabric 6 Solid gather 60 Base end 61 Sheet material 63 Free end 64 Solid gather elastic member 7 Leg gather 71 Leg Elastic member 8 Waist part 81 Waist elastic member A Abdominal part B Back part

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) A61F 5/44 // A61F 13/515 F-term (Reference) 3B029 BC02 BC07 BD12 BD13 BD14 BD15 BD17 BD18 4C003 AA02 BA02 CA01 DA01 4C098 AA09 CC02 CC10 CC12 DD05 DD10

Claims (6)

[Claims] 1. A liquid-permeable topsheet, a liquid-impermeable leakproof sheet, and a liquid-retentive absorber, and a sheet material for forming a three-dimensional guard is provided on both left and right sides in the longitudinal direction of the absorber. In the absorbent article in which a three-dimensional guard is formed, at least the left and right side edges in the longitudinal direction cover the left and right side edges of the absorber, and the left and right sides of the surface side of the absorber are provided. An absorbent article arranged to be located on an edge. 2. The absorbent article according to claim 1, wherein the three-dimensional guard is formed such that a base end thereof is located on an inner side of the absorbent article with respect to a side edge of the absorber. 3. The absorbent article according to claim 1, wherein a side edge of the leakproof sheet is located on an inner side of the absorbent article relative to the base end. 4. An outer nonwoven fabric is disposed on the back side of the leak-proof sheet, and the outer nonwoven fabric and the sheet material are
2. The leg gather is formed by extending the outer layer nonwoven fabric and the sheet material both extending toward the outer side of the absorbent article than the side edge of the absorbent body. 3. ~
4. The absorbent article according to any one of 3. 5. The absorbent article according to claim 1, wherein each of the sheet material and / or the outer layer nonwoven fabric has a CD strength of 1000 cN / 50 mm or more. 6. The topsheet is disposed so as to be located on the surface side of the absorber and so that its side edge is not located outside the absorbent article than the side edge of the absorber. The absorbent article according to any one of claims 1 to 5, wherein the sheet material is fixed to the topsheet on a side portion of the absorber.