JPH1119127A - Disposable body fluid absorbing pad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a body fluid from being exuded from a side part by permitting a core to contain pulverized pulp and high absorption polymer particles, forming fluid holding part in the peripheral edge parts of the core which contains a prescribed quantity of polymer particles so as to form a gel block and forming a fluid permeable part by which the fluid passes through between fluid permeable sheets in a remaining part. SOLUTION: This pad is constituted of a fluid permeable upper surface sheet 6 positioned at the skin side of a wear in a diaper 2, the fluid permeable lower surface sheet 7 positioned at the side of the diaper 2 and a fluid absorbing core 8 held between the upper and lower surface sheets 6 and 7. Then, the core 8 contains at least pulverized pulp and high absorption polymer particles and the belt-shaped first fluid holding parts 21 containing 40-98 wt.% polymer particles are extended in both side edge parts 11. The belt-shaped second holding part 22 containing the polymer particles in a same way is formed between the first fluid holding parts 21. Besides, the fluid permeable part 23 by which a body fluid passes through the upper and the lower sheets 6 and 7 with the core 8 is formed in the remaining part except the first and the second fluid holding parts 21 and 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable body fluid-absorbing pad which can be used in combination with a body fluid-absorbing article such as a disposable diaper to improve the absorption capacity of the article.

[0002]

2. Description of the Related Art Japanese Utility Model Registration No. 251443 discloses a disposable diaper including a diaper main body and an auxiliary absorbent pad to be used on the diaper main body. By using this auxiliary absorbent pad, the body fluid absorption capacity of the diaper is increased. Such an auxiliary absorbent pad is generally smaller than the contour shape of the diaper main body, and when overlapped on the diaper main body, each of both side portions in the width direction of the pad is located at each of the bonding portions on both widthwise side portions of the diaper main body. It is formed in width. The pad also extended a liquid-permeable top sheet, a liquid-permeable or liquid-impermeable bottom sheet, a liquid-absorbing core interposed between the upper and lower sheets, and outwardly from both side edges of the core. And a flap formed by a part of the upper and lower sheets.

[0003]

In the above-mentioned known diaper, when the upper and lower sheets of the auxiliary absorbent pad are liquid-permeable, the body fluid also passes through the pad to the absorbent core on the diaper main body side. Since it is absorbed, there is an advantage that the absorption capacity of the diaper is a relatively large capacity of that of the pad and that of the core. However, since this pad has no means to prevent the absorbed body fluid from seeping out of the pad, the body fluid, which should have been absorbed once, seeps out from the side of the pad and causes discomfort to the wearer, It is unavoidable to cause body fluid leakage from the diaper.

Accordingly, an object of the present invention is to prevent the exudation of bodily fluid from the sides of an absorbent pad whose upper and lower surfaces are covered with a liquid-permeable sheet.

[0005]

In order to solve the above-mentioned problems, the present invention is based on the premise that a disposable bodily fluid absorbent having a liquid-absorbent core interposed between liquid-permeable sheets that are vertically stacked. It is a pad.

Under such a premise, the present invention is characterized in that the core comprises at least ground pulp and superabsorbent polymer particles, and at least a part of a portion along the periphery of the core has A liquid-retaining portion containing polymer particles of 40 to 98% by weight and capable of forming a gel block when absorbing body fluid is formed, and the remaining portion except for the above-mentioned portion receives the body fluid through the core. That is, a liquid-permeable portion capable of transmitting between liquid-permeable sheets is formed.

[0007] Preferred embodiments of the present invention are as follows. (1) The liquid retaining portion has a width of 5 to 30 mm and a thickness occupying 30 to 100% of the thickness of the core. (2) The upper and lower sheets are joined to each other outside the peripheral edge of the core, and at least one of the sheets extends to the side of the core, so that a flap is formed on the peripheral edge of the pad. ing. (3) A hydrophobic sheet is bonded to at least one peripheral edge of the upper and lower sheets, and the hydrophobic sheet extends outside the peripheral edge of the core, so that at least a part of the flap is formed. I have. (4) On one surface of the flap, a fastening area where the pad can be attached to an article worn with the pad is formed. (5) The core comprises 5 to 40% by weight of the thermoplastic synthetic fiber.
Contains. (6) The thermoplastic synthetic fibers are welded to each other.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a disposable body fluid absorbing pad according to the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 are a perspective view showing a use state of a disposable diaper absorbent pad 1 which is an example of a disposable body fluid absorbent pad, and a sectional view taken along line II-II. In these FIGS. 1 and 2, the pad 1 indicated by a solid line
Is placed on the inner surface of the disposable diaper 2 indicated by a virtual line.

The pad 1 comprises a liquid-permeable upper sheet 6 located on the skin side of the wearer of the diaper 2, a liquid-permeable lower sheet 7 located on the side of the diaper 2, and upper and lower surfaces thereof. And a liquid absorbing core 8 interposed between the sheets 6 and 7. The core 8 is substantially rectangular and has a pair of side edges 11 and a pair of end edges 12 which are parallel to each other. Each of the upper and lower sheets 6, 7 extends laterally from the side edge 11 and the end edge 12 of the core 8, and is joined by the inner surfaces of the extended portions to form a pair of side edge flaps 13.
And an edge flap 14. On the lower surface of the side edge flap 13, a fastening area 16 is formed, which can be peelably or non-peelably fastened to the upper surface of the diaper 2.

FIG. 3 is a perspective view of the core 8. Core 8
Contains at least the pulverized pulp 17 and the superabsorbent polymer particles 18, and in each of the both side edges 11,
A strip-shaped first liquid retaining portion 21 containing polymer particles 18 in an amount of 40 to 98% by weight extends between both end portions 12. Similarly, between the first liquid retaining portions 21, 4
A band-shaped second liquid retaining portion 22 containing 0 to 98% by weight is formed. There are cases where the second liquid retaining section 22 has reached both ends 12 and where it has not. First and second
Each of the liquid retaining portions 21 and 22 has a width of 5 to 30 mm extending toward the side edge portion 11 and a thickness occupying 30 to 100% of the thickness of the core 8. In the state where the portion 21 occupies about 100%, the second liquid holding portion 22
It is shown as occupying 0%. These first and second liquid retaining parts 21 and 22 can contain the pulverized pulp 17 and the thermoplastic synthetic fiber in the range of 60 to 2% by weight. These pulp 17 and fibers not only serve to connect the polymer particles 18 to each other to maintain the shape of the liquid retaining portions 21 and 22, but also to promote penetration of body fluid into the liquid retaining portions 21 and 22. Useful.

The remaining portion excluding the first and second liquid retaining portions 21 and 22 contains a liquid permeable portion containing 80 to 100% by weight of pulverized pulp 17 and 20 to 0% by weight of thermoplastic synthetic fibers and polymer particles 18. 23 are formed. The liquid permeation part 23 includes
It may extend to the upper surface side and / or the lower surface side of the two liquid retaining portions 21 and 22. The second liquid holding unit 22 in FIG. 2 is in such a state. The thickness of the core 8 in the portion covered in this way is the sum of the thicknesses of the liquid permeable portion 23 and the first or second liquid retaining portions 21 and 22.

The core 8 can be compressed to an appropriate density in order to maintain its shape, more preferably compressed in a water-absorbing state of 3 to 10% by weight, and then dried if necessary. In order to maintain the shape, the thermoplastic synthetic fibers included in the core 8 may be welded to each other. Furthermore, the core 8 is coated with tissue paper by a well-known and conventional means to maintain the shape,
Dispersion of the polymer particles 18 can be prevented.

The pad 1 thus formed is shown in FIG.
As shown in FIG. 2, the core 8 is placed on the absorbent core 31 from above the liquid-permeable top sheet 33 of the disposable diaper 2,
The fastening area 16 of the side edge flap 13 is joined to the upper surface of the flap 32 of the diaper 2. The bodily fluid excreted on the pad 1 penetrates into the pad 1 and a part of the bodily fluid is retained in the first and second liquid retaining portions 2.
It is absorbed by 1,22 polymer particles 18. A part is absorbed by the pulverized pulp 17 of the liquid permeation part 23 and the like.

The polymer particles 18 of the first liquid retaining portion 21 are in a state of being in contact with each other or in a state of being easily in contact with each other, and swell after absorbing the liquid to form a gel block. 11 to suppress the exudation of body fluids. Therefore, even if the pad 1 does not have a leakage prevention means such as a leakage prevention sheet on the side edge portion 11, lateral leakage of body fluid can be prevented. The first liquid retaining portion 21 may be formed only on a part of the side edge 11 of the core 8, or may be formed on the entire periphery of the core 8. The second liquid retaining part 22 contributes to improving the absorption capacity of the core 8.

In the liquid-permeable portion 23, the body fluid is applied to the top sheet 6,
The light passes through the core 8 and the lower sheet 7 and shifts to the diaper 2. In order to facilitate the transfer, the polymer particles 18 of the liquid-permeable portion 23 are uniformly dispersed in the portion 23 so as not to form a gel block between the particles, and are separated from each other. Is preferred.

FIG. 4 shows an embodiment of the present invention.
FIG. In the illustrated pad 1, the width of the liquid-permeable upper and lower sheets 6 and 7 is relatively narrow and ends near the side edge 11 of the core 8. The side edge flap 13 of the pad 1 is formed of a sheet 38, and the inner edge of the sheet 38 is joined to the side edges 36, 37 of the upper and lower sheets 6, 7, respectively. The sheet 38 is hydrophobic, and no body fluid penetrates the sheet 38. In the pad 1 of FIGS. 1 and 2, the bodily fluid absorbed by the liquid-permeable upper and lower sheets 6 and 7 diffuses in the sheets 6 and 7 and oozes out from the side edge flaps 13, where the wearer's legs Although there is a risk of soiling the surroundings, the pad of the embodiment of FIG. 4 does not have such a risk.

In the pad 1, nonwoven fabric is preferably used for the liquid-permeable upper and lower sheets 6, 7, but an apertured plastic film or the like may be used. In order to join these sheets 6 and 7 or to join these sheets 6 and 7 with the hydrophobic sheet 38, an adhesive such as a hot melt adhesive is used, or welding such as ultrasonic welding is used. Technology.

The disposable body fluid-absorbing pad according to the present invention can be widely used for improving the absorption capacity of various body fluid-absorbing articles in addition to the disposable diapers exemplified.

[0020]

According to the disposable body fluid absorbing pad of the present invention, since the upper and lower sheets are liquid-permeable, if they are used in a disposable diaper, the absorbent capacity of the diaper can be improved.

The liquid retaining portion formed on the side edge of the liquid absorbing core of the pad contains superabsorbent polymer particles of 40 to 98%.
% By weight and absorbs bodily fluids to form a gel block to prevent exudation of bodily fluids from the side edges of the core.

When each of the upper and lower sheets of the pad is a liquid-permeable nonwoven fabric and the flap of the pad is formed of a hydrophobic sheet, the body fluid absorbed by the pad may ooze out of the flap. Absent.

In the embodiment in which the fastening area is formed on the flap of the pad, the pad can be securely fixed to an appropriate portion of a worn article such as a diaper.

[Brief description of the drawings]

FIG. 1 is a perspective view of a body fluid absorbing pad in a use state.

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

FIG. 3 is a perspective view of a core.

FIG. 4 is a drawing similar to FIG. 2 showing an example of the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pad 6,7 Liquid-permeable sheet 8 Core 11,12 Peripheral part 13,14 Flap 16 Fixing area 17 Pulp 18 Polymer particles 21,22 Liquid retention part 23 Liquid-permeable part

Claims (7)

[Claims] 1. A disposable body fluid-absorbing pad having a liquid-absorbent core interposed between liquid-permeable sheets that are vertically stacked, the core comprising at least ground pulp and superabsorbent polymer particles. At least a portion of the portion along the periphery of the core, wherein the polymer particles comprise 40 to 98% by weight;
A liquid retaining portion capable of forming a gel block when absorbing a body fluid is formed, and in a remaining portion other than the portion, a fluid through which the body fluid can pass between the upper and lower liquid-permeable sheets via the core is provided. The pad, wherein a liquid part is formed. 2. The pad according to claim 1, wherein the liquid retaining portion has a width of 5 to 30 mm and a thickness occupying 30 to 100% of the thickness of the core. 3. The upper and lower sheets are joined to each other outside a peripheral portion of the core, and at least one of the sheets extends to the side of the core, so that a flap is formed on the peripheral portion of the pad. The pad according to claim 1, wherein the pad is formed. 4. A hydrophobic sheet is bonded to at least one peripheral portion of the upper and lower sheets, and the hydrophobic sheet extends outside the peripheral portion of the core to form at least a part of the flap. The pad according to claim 3, wherein the pad is formed. 5. The pad according to claim 1, wherein a fastening area is formed on one surface of the flap so that the pad can be attached to an article worn with the pad. 6. The core according to claim 5, wherein said core is made of thermoplastic synthetic fibers.
The pad according to any one of claims 1 to 5, comprising 0% by weight. 7. The pad according to claim 6, wherein the thermoplastic synthetic fibers are welded to each other.