JP3242861U - urine pad - Google Patents

Abstract

An object of the present invention is to provide a urine absorbing pad that rapidly absorbs moisture in excrement such as urine. A urine absorbing pad 11 includes a liquid-permeable top sheet 21 arranged on the side directly contacting the user's body, and a liquid-impermeable and air-impermeable back sheet 61 arranged on the side opposite to the user's body, and a single-layer absorbent body 41 is provided between the top sheet 21 and the back sheet 61. - 特許庁A cover sheet 31 is arranged between the top sheet 21 and the absorbent body 41 , and an intermediate sheet 32 is interposed between the cover sheet 31 and the absorbent body 41 . The intermediate sheet 32 is, for example, an air-through nonwoven fabric having a basis weight of 28-42 g/m2 and a thickness of 0.32-0.48 g/m2. The top sheet 21, the cover sheet 31, the intermediate sheet 32 and the absorbent body 41 are each fixed with a hot-melt adhesive. [Selection drawing] Fig. 1

Description

The present disclosure relates to a urine absorbing pad.

The urine absorbing pad is used by putting it in a diaper or undergarments (pants). As sometimes called a urinary leakage pad, it is intended to absorb water in excrement such as leaked urine (hereinafter collectively referred to as "urine").

The urine absorbing pad is arranged between the top sheet and the back sheet so as to wrap the absorbent body.

The top sheet is a liquid-permeable sheet-like member arranged on the side that comes into direct contact with the user's body. The absorbent absorbs urine passing through the topsheet. The back sheet is a liquid-impermeable sheet-like member placed on the opposite side of the user's body, and prevents urine that has passed through the absorbent body or circulated around the absorbent body and leaks to the outside. don't put it out.

In urine absorbing pads, a cover sheet is generally arranged on the top sheet side and a carrier sheet is arranged on the back sheet side, and the absorbent body is wrapped with the carrier sheet and the cover sheet. The carrier sheet and the cover sheet prevent scattering of pulp, superabsorbent polymer (SAP), etc. included in the absorbent body.

As for the absorbent body, an absorbent body having a two-layer structure is also known in order to secure the amount of liquid that can be absorbed. For example, see paragraphs [0002] [0038] and FIG. 3 in the specification of Patent Document 1.

Patent document 1 also discloses interposing an intermediate sheet (25) between the top sheet and the absorbent body (paragraph [0033] of patent document 1, see FIG. 3). The intermediate sheet (25) is provided to prevent backflow of urine absorbed in the two layers of absorbent bodies (upper absorbent body 23A and lower absorbent body 23B). It is desirable to use highly liquid-permeable materials such as various non-woven fabrics and mesh films."

Patent Document 1 also teaches that the absorbers (23A, 23B) can be wrapped with "packaging sheets 26 having liquid permeability and liquid retention properties, such as crepe paper" (paragraph [0041] of Patent Document 1). , Figures 3-4 and 6). The packaging sheet (26) corresponds to the cover sheet and the carrier sheet. When the absorbent body is wrapped with the packaging sheet (26), the intermediate sheet (25) is arranged between the top sheet and the cover sheet (packaging sheet 26) (see FIGS. 3-4 and 6 of Patent Document 1). reference).

In the urine absorption pad (absorbent article) described in Patent Document 2, an absorbent body covering sheet (50) corresponding to a cover sheet is interposed between the top sheet and the absorbent body, and the top sheet and the absorbent body covering are interposed. A second seat (40) is arranged between the seat (50). In this incontinence pad (absorbent article), the absorber is in direct contact with the back sheet, and no carrier sheet is provided.

The absorber covering sheet (50) is described as "anything that has hydrophilicity, preferably a pulp-containing tissue, absorbent paper, or the like, but a hydrophilic nonwoven fabric such as an air-laid nonwoven fabric may also be used" (Patent Document 2, paragraph [0043]).

The second sheet (40) "improves liquid diffusibility and suppresses liquid return from the absorber 30 of bodily fluids", and includes "for example, hydrophilic nonwoven fabrics, etc. Among them, air-through nonwoven fabrics are used. preferable” (see paragraph [0040] of Patent Document 2).

In the urine absorption pad (absorbent article) disclosed in Patent Document 3, an absorbent is arranged between a top sheet and a back sheet, and the absorbent is divided into a cover sheet (upper carrier sheet 208) and a carrier sheet (lower carrier sheet 209). ), and a liquid-diffusing sheet (206) is interposed between the top sheet and the cover sheet (paragraph [0011] of Patent Document 3, see FIG. 2).

The upper carrier sheet (208) is exemplified by "a wood pulp sheet or a sheet formed by supporting zeolite or zeolite containing metal ions (Cu ions, Ag ions, etc.) in wood pulp fibers" ( See paragraph [0020] of Patent Document 3).

As the liquid-diffusing sheet (206), hydrophilic nonwoven fabrics such as air-through nonwoven fabrics, point-bonded nonwoven fabrics, and spun-bonded nonwoven fabrics can be used, and it is stated that air-through nonwoven fabrics with low liquid return are suitable. (See paragraph [0017] of Patent Document 3). According to Patent Document 3, provision of the liquid-diffusing sheet (206) promotes the diffusion of body fluids in the planar direction, and suppresses a decrease in absorption rate during repeated absorption even if the absorbent layer 210 is thin. (See paragraph [0016] of Patent Document 3).

JP 2017-140251 A JP 2022-067373 A JP 2015-154881 A

The intermediate sheet (25) of Patent Document 1, the second sheet (40) of Patent Document 2, and the liquid-diffusing sheet (206) of Patent Document 3 are all composed of a top sheet and a cover sheet (packaging sheet 26 of Patent Document 1, It is arranged between the absorber covering sheet 50 of Patent Document 2 and the upper carrier sheet 208 of Patent Document 3), and is formed of a material different from that of the cover sheet. It is believed that such arrangement and combination of materials may affect the rate of urine absorption.

An object of the present disclosure is to obtain a urine absorbing pad having a high urine absorption rate.

One aspect of the urine absorbing pad consists of a liquid-permeable top sheet placed on the side that directly contacts the user's body, and a liquid-impermeable and air-impermeable back placed on the side opposite to the user's body. a sheet, a single-layer absorbent body disposed between the topsheet and the backsheet, and a coversheet disposed between the topsheet and the absorbent body, wherein the coversheet and the absorbent body are disposed between the coversheet and the absorbent body. An intermediate sheet made of the same material as the cover sheet is interposed between the absorber and the absorbent body.

It is possible to obtain a urine absorbing pad that absorbs urine at a high speed, and can improve comfort when worn.

1 is a schematic exploded perspective view of a urine absorbing pad according to an embodiment; FIG. The schematic diagram which makes a urine absorption pad the vertical cross section and shows it.

An embodiment of a urine absorbing pad will be described based on the drawings. The explanation follows along the lines of the following items.

1. Structure (1) Basic structure (2) Top sheet (3) Three-dimensional gathers (4) Cover sheet (5) Intermediate sheet (6) Absorber (7) Carrier sheet (8) Back sheet (9) Bonding between sheets 2. Action and effect (1) Basic action and effect (2) Absorption rate of urine (3) Others 3. Modification

1. Configuration (1) Basic Configuration The urine absorbing pad 11 holds the absorbent body 41 between the top sheet 21 and the back sheet 61 so as to wrap it. These top sheet 21, absorbent body 41, and back sheet 61 have a rectangular shape with long sides and short sides. The absorbent body 41 and the back sheet 61 have constricted side portions on the long sides, and the width on the central portion side is narrower than that on both end portions.

A cover sheet 31 and an intermediate sheet 32 are interposed between the top sheet 21 and the absorbent body 41 . The cover sheet 31 is arranged on the top sheet 21 side. The intermediate sheet 32 is arranged on the absorber 41 side. These cover sheet 31 and intermediate sheet 32 also have a rectangular shape with long sides and short sides.

A carrier sheet 51 is interposed between the absorbent body 41 and the back sheet 61 . The carrier sheet 51 also has a rectangular shape with long sides and short sides.

A pair of three-dimensional gathers 22 are attached to the top sheet 21 . These three-dimensional gathers 22 are fixed by adhesion to both sides of the top sheet 21, and are also fixed by adhesion to the back sheet 61 so as to wrap the cover sheet 31, the intermediate sheet 32, the absorbent body 41, and the carrier sheet 51. there is As a result, the cover sheet 31 , the intermediate sheet 32 , the absorbent body 41 and the carrier sheet 51 are held between the top sheet 21 and the back sheet 61 so as to be wrapped.

(2) Top Sheet The top sheet 21 is a liquid-permeable sheet-like member arranged on the side that comes into direct contact with the user's body. As an example, it has the following specifications.
- Type: Air-through non-woven fabric - Basis weight: 20 to 30 g/m ² . preferably 25 g/m ²
- Thickness: 0.3 mm ± 20%. preferably 0.3 mm
- Density: 0.083 g/m ³ ±20%. preferably 0.083 g/m ³
・Material: PE-PET
- Fiber thickness: ±20% of 2.2 dtex. preferably 2.2 dtex

(3) Three-dimensional gathers For the three-dimensional gathers 22, non-woven fabric is used, for example. A region of the three-dimensional gathers 22 from the bonding margin with the top sheet 21 to the inner edge portion is a freely deformable region, and rubber threads 23 are incorporated in this region.

The height of the three-dimensional gathers 22 is, for example, 35-60 mm, preferably 50 mm.

(4) Cover Sheet The cover sheet 31 is a sheet-like member for preventing scattering of pulp and the like provided in the absorber 41 . As an example, it has the following specifications.
- Type: air-through nonwoven fabric - Basis weight: 28 to 42 g/m ² . preferably 35 g/m ²
- Thickness: 0.4 mm ± 20%. preferably 0.4 mm
- Density: 0.088 g/m ³ ±20%. preferably 0.088 g/m ³
・Material: PE-PP
- Fiber thickness: ±20% of 5.6 dtex. preferably 5.6 dtex

(5) Intermediate Sheet The intermediate sheet 32 is a sheet-like member made of the same material as the cover sheet 31 . The cover sheet 31 has the following specifications, for example.
- Type: air-through nonwoven fabric - Basis weight: 28 to 42 g/m ² . preferably 35 g/m ²
- Thickness: 0.4 mm ± 20%. preferably 0.4 mm
- Density: 0.088 g/m ³ ±20%. preferably 0.088 g/m ³
・Material: PE-PP
- Fiber thickness: ±20% of 5.6 dtex. preferably 5.6 dtex

(6) Absorber The absorber 41 is made of a single pulp layer. The pulp layer may contain superabsorbent polymer (SAP), which is a hydrophilic polymer with a framework structure.

(7) Carrier Sheet The carrier sheet 51 is a sheet-like member made of nonwoven fabric, for example.

(8) Backsheet The backsheet 61 is a sheet-like member made of a liquid-impermeable and air-impermeable material that is placed on the opposite side of the user's body. A material used for the back sheet 61 is, for example, a resin film such as polyethylene (PE) or polyester (PEs).

The basis weight of the backsheet 61 is, for example, 15 to 25 g/m ² , such as 20 g/m ² .

(9) Bonding Between Sheets The top sheet 21, the cover sheet 31, the intermediate sheet 32, the absorbent body 41, the carrier sheet 51, and the back sheet 61 are each fixed with a hot-melt adhesive.

The amount of hot melt adhesive between the topsheet 21 and the coversheet 31 is for example 2.62-3.94 g/m ² , preferably 3.28 g/m ² .

The amount of hot melt adhesive between the cover sheet 31 and the intermediate sheet 32 is for example 1.4-2.1 g/m ² , preferably 1.75 g/m ² .

The amount of hot melt adhesive between the intermediate sheet 32 and the absorbent body 41 is for example 1.4-2.1 g/m ² , preferably 1.75 g/m ² .

2. Function and effect (1) Basic function and effect The urine absorption pad 11 is placed in a diaper or underwear (pants) with the top sheet 21 on the inner side with the three-dimensional gathers 22 applied to the user's skin. use. When the user leaks urine, urine passes through the top sheet 21 and is absorbed by the pulp layer of the absorbent body 41 . At this time, the three-dimensional gathers 22 suppress urine from flowing to both sides of the urine absorbing pad 11 .

Urine that the absorbent body 41 has not fully absorbed or urine that has flowed in from both sides of the absorbent body 41 is blocked by the liquid-impermeable and air-impermeable back sheet 61 , and the urine-absorbing pad 11 is kept on the outer side of the urine absorbing pad 11 . , that is, leakage into diapers and underwear is suppressed.

(2) Urine Absorption Speed In the present embodiment, an intermediate sheet 32 made of the same material as the cover sheet 31 is interposed between the cover sheet 31 and the absorber 41 . Moisture in excrement such as urine diffuses in the cover sheet 31 and the intermediate sheet 32 under the same conditions and is absorbed by the absorber 41, so that the absorption rate is increased. As a result, comfort during wearing can be improved.

The following configuration also contributes to the increase in urine absorption speed.

(2-1)
(a) An air-through nonwoven fabric is used for the intermediate sheet 32. (b) Under these conditions, the basis weight of the intermediate sheet 32 is 28 to 42 g/m ² .
(c) Under these conditions, the thickness of the intermediate sheet 32 should be 0.32 to 0.48 g/m ² .

(2-2)
(a) An air-through nonwoven fabric is used for the cover sheet 31 and the intermediate sheet 32 .
(b) Under these conditions, the basis weight of the cover sheet 31 should be 28 to 42 g/m ² and the basis weight of the intermediate sheet 32 should be 28 to 42 g/m ² .
(c) Under these conditions, the thickness of the cover sheet 31 should be 0.32 to 0.48 g/m ² and the thickness of the intermediate sheet 32 should be 0.32 to 0.48 g/m ² .

(2-3)
(a) The top sheet 21, the cover sheet 31 and the intermediate sheet 32 are made of air-through nonwoven fabric.
(b) Under these conditions, the basis weight of the top sheet 21 is 20 to 30 g/m ² , the basis weight of the cover sheet 31 is 28 to 42 g/m ² , and the basis weight of the intermediate sheet 32 is 28 g/m 2 . ~42 g/ ^m2 .
(c) Under these conditions, the thickness of the top sheet 21 is 0.24 to 0.36 g/m ² , the thickness of the cover sheet 31 is 0.32 to 0.48 g/m ² , and the thickness of the intermediate sheet 32 is 0.32 to 0.48 g/m 2 . thickness should be 0.32 to 0.48 g/m ² .

(2-4)
(a) The top sheet 21, the cover sheet 31, the intermediate sheet 32 and the absorbent body 41 are fixed with a hot-melt adhesive.
(b) At this time, the amount of hot-melt adhesive applied between the top sheet 21 and the cover sheet 31 should be 2.62 to 3.94 g/m ² .
(c) At this time, the amount of hot-melt adhesive applied between the cover sheet 31 and the intermediate sheet 32 should be 1.4 to 2.1 g/m ² .
(d) At this time, the amount of hot-melt adhesive applied between the intermediate sheet 32 and the absorbent body 41 should be 1.4 to 2.1 g/m ² .

(2-5)
(a) The top sheet 21, the cover sheet 31, the intermediate sheet 32 and the absorbent body 41 are fixed with a hot-melt adhesive.
(b) At this time, the amount of hot melt adhesive applied between the top sheet 21 and the cover sheet 31 is 2.62 to 3.94 g/m ² , and the amount of the hot melt adhesive between the cover sheet 31 and the intermediate sheet 32 is The application amount of the hot-melt adhesive is 1.4-2.1 g/m ² , and the application amount of the hot-melt adhesive between the intermediate sheet 32 and the absorbent body 41 is 1.4-2.1 g/m 2 . be ^m2 .

(3) Others In the urine absorbing pad 11 of the present embodiment, the three-dimensional gathers 22 are provided on the side of the top sheet 21, and the height of the three-dimensional gathers 22 is 35 to 60 mm. It is possible to increase the regulated amount of urine that has come around and prevent leakage of urine from both sides of the urine absorbing pad 11 .

According to the present embodiment, since the carrier sheet 51 is arranged between the back sheet 61 and the absorbent body 41, scattering of the pulp layer and SAP constituting the absorbent body 41 can be prevented.

3. Modifications Various modifications and changes are possible in practice.

For example, in the above-described embodiment, the specifications of each part of the urine absorbing pad 11, such as the cover sheet 31 and the intermediate sheet 32, are mentioned, but these are only examples, and different specifications may be applied to each part in practice. good.

In addition, all variations and modifications are allowed in implementation.

The inventors of this application conducted an experiment to verify the rate of absorption of urine. Experiments were carried out under the following conditions.
(Adoption of artificial urine)
Artificial urine containing 0.9% sodium oxide and 0.5% thickening powder was prepared and used in the experiment.
(dropping height and position)
The artificial urine was dripped onto the urine absorbing pad 11 from a height of 50 mm. The dropping position is the central position in the length direction (long side direction) and width direction (short side direction) of the urine absorbing pad 11 .
(Drip amount)
100 cc of artificial urine was dripped for 10 seconds.

In the experiment, samples having the specifications shown in Table 1 were prepared as the urine absorbing pad 11 of the present embodiment. Two types of comparative examples (Comparative Example 1 and Comparative Example 2) shown in Table 1 were also prepared. Comparative Examples 1 and 2 are different from the present embodiment in that the intermediate sheet 32 is not provided, and only the cover sheet is provided between the top sheet and the absorbent body.

The meanings of the terms in Table 1 are as follows.

"Bulk air-through" means an air-through nonwoven fabric.
"Hydrophilic spun" means a hydrophilic spunbond nonwoven.
"Topsheet HM" means the amount of hot melt adhesive applied between the topsheet and the coversheet.
"HM under the top sheet" refers to the amount of hot-melt adhesive applied between the cover sheet 31 and the intermediate sheet 32 in this embodiment, and the amount of hot-melt adhesive applied between the cover sheet and the absorbent body in Comparative Examples 1 and 2. Each means the amount of adhesive applied.
“Intermediate sheet lower HM” means the amount of hot-melt adhesive applied between the intermediate sheet 32 and the absorbent body 41 .

From the experimental results shown in Table 1, it can be seen that the sample of the present embodiment significantly improves the urine absorption rate as compared with Comparative Examples 1 and 2. Specifically, the sample of the present embodiment succeeded in shortening the average absorption speed, which took 600 seconds or more in Comparative Examples 1 and 2, to 67.3 seconds.

As for the average amount of urine absorbed, the samples of the present embodiment also gave better values than those of Comparative Examples 1 and 2.

As described above, according to the urine absorbing pad 11 of the present embodiment provided with the intermediate sheet 32, the urine absorption speed can be greatly reduced as compared with the comparative examples 1 and 2 in which the intermediate sheet 32 is not provided. and can also increase urine absorption.

11 urine absorption pad 21 top sheet 22 three-dimensional gathers 31 cover sheet 32 intermediate sheet 41 absorbent body 51 carrier sheet 61 back sheet

Claims (18)

a liquid-permeable top sheet disposed on the side that directly contacts the user's body;
a liquid-impermeable and air-impermeable backsheet positioned opposite the user's body;
a single layer absorbent disposed between the topsheet and the backsheet;
a cover sheet disposed between the top sheet and the absorbent body;
with
An intermediate sheet made of the same material as the cover sheet is interposed between the cover sheet and the absorbent body.
urine pad. An air-through nonwoven fabric is used for the intermediate sheet,
The urine absorbing pad according to claim 1. The basis weight of the intermediate sheet is 28-42 g/m ² ,
The urine absorbing pad according to claim 2. The intermediate sheet has a thickness of 0.32 to 0.48 g/m ² ,
The urine absorbing pad according to claim 3. An air-through nonwoven fabric is used for the cover sheet and the intermediate sheet,
The urine absorbing pad according to claim 1. The basis weight of the cover sheet is 28 to 42 g/m ² ,
The basis weight of the intermediate sheet is 28-42 g/m ² ,
The urine absorbing pad according to claim 5. The cover sheet has a thickness of 0.32 to 0.48 g/m ² ,
The intermediate sheet has a thickness of 0.32 to 0.48 g/m ² ,
The urine absorbing pad according to claim 6. An air-through nonwoven fabric is used for the top sheet, the cover sheet, and the intermediate sheet.
The urine absorbing pad according to claim 1. The basis weight of the top sheet is 20 to 30 g/m ² ,
The basis weight of the cover sheet is 28 to 42 g/m ² ,
The basis weight of the intermediate sheet is 28-42 g/m ² ,
The urine absorbing pad according to claim 8. The thickness of the top sheet is 0.24 to 0.36 g/m ² ,
The cover sheet has a thickness of 0.32 to 0.48 g/m ² ,
The intermediate sheet has a thickness of 0.32 to 0.48 g/m ² ,
The urine absorbing pad according to claim 9. Three-dimensional gathers are provided on the side of the top sheet,
The urine absorbing pad according to claim 1. The height of the three-dimensional gathers is 35 to 60 mm,
The urine absorbing pad according to claim 11. A carrier sheet disposed between the backsheet and the absorbent body,
The urine absorbing pad according to claim 1. The top sheet, the cover sheet, the intermediate sheet and the absorbent body are fixed with a hot-melt adhesive,
The urine absorbing pad according to any one of claims 1 to 13. The applied amount of hot melt adhesive between the top sheet and the cover sheet is 2.62-3.94 g/m ² ,
The urine absorbing pad according to claim 14. The application amount of the hot melt adhesive between the cover sheet and the intermediate sheet is 1.4-2.1 g/m ² ,
The urine absorbing pad according to claim 14. The application amount of the hot-melt adhesive between the intermediate sheet and the absorbent body is 1.4-2.1 g/m ² ,
The urine absorbing pad according to claim 14. The amount of hot melt adhesive applied between the top sheet and the cover sheet is 2.62 to 3.94 g/m ² ,
The coating amount of the hot melt adhesive between the cover sheet and the intermediate sheet is 1.4 to 2.1 g/m ² ,
The application amount of the hot-melt adhesive between the intermediate sheet and the absorbent body is 1.4-2.1 g/m ² ,
The urine absorbing pad according to claim 14.

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