JP2927878B2 - Disposable diapers - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a diaper for infants, training pants, disposable clothing for incontinent persons or adults, and more particularly to a pants-type disposable diaper.

[Conventional technology]

BACKGROUND ART Conventionally, disposable diapers having a tape fastener (flat diapers) are designed to be easily worn or worn by a wearer in a lying position, but particularly intense movements when the user starts walking. In the case of infants, it is difficult to wear them properly, leaving gaps in the waist and legs, and even if they have gathers to prevent leakage, their functions cannot be exhibited. It was not possible to sufficiently prevent leakage at the part. In addition, a diaper that has a target tape for fastening is provided on the waist flap portion, and it is possible to properly attach the tape fastener so that the diaper can be properly worn, but even in such a diaper, while wearing it, In some cases, the tape fastener may come off, or the tape fastener itself may be removed due to a feeling of oppression, thereby causing leakage.

On the other hand, in recent years, without using a tape fastener, a so-called pants-type diaper in which the side portions have been joined and fixed in advance has been developed. As such a pants-type diaper, for example, a gather portion is provided on a waist portion and a leg portion. (Japanese Unexamined Patent Publication No. Sho 58-115106), wherein the leg hole is deflected to the front side from the center line to eliminate the gap or looseness in the leg portion and improve the absorption performance (Japanese Patent Laid-Open No. Sho 62-115106).
Various publications have been proposed. All of these pants-type diapers are worn in the same standing position as normal underwear, and are intended for use in toilet training for not only infants but also for older children, or for incontinents and adults. is there.

[Problems to be solved by the invention]

However, JP-A-58-115106 and JP-A-62-115106
The pants-type diaper described in JP 231005, the width of the absorber at the crotch portion and the crotch portion like a flat type to be worn in an open leg state in a lying position because the crotch cannot be widened because it is worn in a standing position The gap between the elastic members for gathers on both sides of the garment (hereinafter referred to as "gather pitch") cannot be made sufficiently wide in accordance with leakage, and the distance from the urination and defecation site to the side edge of the leg portion of the diaper Has a problem that the lateral leakage is likely to occur.

In addition, the conventional pants-type diaper has a problem in that, even when leakage is prevented, for example, in a wearing state, the stool that reaches the leg gathers leaks when the diaper is removed.

Therefore, an object of the present invention is that the gathers of the leg portions are in close contact with the groin portion to reliably prevent lateral leakage of excrement and to securely capture and accommodate hardly absorbable components such as stool. An object of the present invention is to provide a pants-type disposable diaper.

[Means for solving the problem]

The present inventors have conducted various studies on the shape of the crotch portion of the pants-type disposable diaper, and have found that the above-described object can be achieved by devising the shape of the crotch portion of the absorbent body.

The present invention has been made based on the above findings, and a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber positioned between these two sheets, and a front and rear portion formed around the absorber. In a pants-type disposable diaper having an elastic elastic member forming a gather at each of the waist portion and the left and right leg portions, and the front and rear waist portions are fixedly joined at both left and right ends, the liquid permeates through the upper surface of the top sheet. Disposable, characterized in that the upper and lower surfaces of the upper surface sheet are overlapped with each other, the front and rear ends of the upper surface sheet are fixed to the top sheet, respectively, and elastic elastic members are disposed on left and right side edges of the upper surface sheet. It provides diapers.

[Action]

ADVANTAGE OF THE INVENTION According to this invention, the gathers of a waist part and a leg part can expand and contract easily, and the gathers of a waist part and a leg part adhere | attach to a waist part and a groin part during wearing, and the excrement To prevent side leakage of
The excrement can be captured by the top sheet of the crotch part.

〔Example〕

Hereinafter, the present invention will be described based on the embodiment shown in FIGS. 1 is a perspective view showing one embodiment of the disposable diaper of the present invention, FIG. 2 is a plan view showing the inside of the disposable diaper of FIG. 1, and FIG. 3 is III in FIG. −I
FIG. 4 is a cross-sectional view showing a cross section taken along the line II, FIG. 4 is a front plan view showing a state in which the disposable diaper shown in FIG. 1 is developed, and FIG. 5 is a cross section showing a curved state taken along the line VV in FIG. FIG. 6, FIG. 6 and FIG. 7 are each a diagram corresponding to FIG. 5 showing another embodiment of the disposable diaper of the present invention, and FIG. 8 is a perspective view showing still another embodiment of the disposable diaper of the present invention. .

As shown in FIGS. 1 to 3, the disposable diaper 1 of the present embodiment includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorber 4 located between these two sheets 2, 3. And elastic elastic members 7 and 8 forming gathers at front and rear waist portions 5 and 5 and left and right leg portions 6 and 6 formed around the absorber 4, respectively. The left and right ends of 5 are joined and fixed by an adhesive, ultrasonic welding, heat welding, or the like, respectively, to form a pants-type diaper.

As shown in FIG. 3, the disposable diaper 1 has a liquid-permeable top sheet 9 superposed on the top sheet 2 and both front and rear ends of the top sheet 9.
9A and 9B are bonded and fixed to the waist portions 5 and 5 of the top sheet 2 by an adhesive, ultrasonic welding, heat welding, or the like. In a state where the disposable diaper 1 is developed, as shown in FIG. 4, the top sheet 9 is formed to have a width smaller than the interval between the elastic members 8 of the leg portions 6.
Elastic elastic members 10 and 10 are provided on both left and right side edges of the top sheet 9, respectively.
10 and 10 are contracted to form gathers on both left and right side edges of the top sheet 9 and to rise from the top sheet 2 to form pocket portions 11 (fifth embodiment).
See figure).

Thus, the top sheet 9 used in the disposable diaper 1 of the present embodiment is preferably a liquid permeable sheet such as a woven fabric, a nonwoven fabric, a mesh sheet, and a porous film. The elastic elastic member 10 used in the disposable diaper 1 of the present embodiment is preferably made of natural rubber, polyurethane, polyurethane foam, or the like.
Further, a yarn or the like which exhibits elasticity when wet with water or the like may be used.

Further, the top sheet 2 used in the disposable diaper 1 of the present embodiment is preferably a liquid-permeable sheet that allows liquid to pass through the absorber 4 and has a feeling similar to underwear, and such a liquid-permeable sheet is , For example, woven fabric, non-woven fabric,
A porous film or the like is preferred. Also, a method of applying a hydrophobic compound such as a silicone oil agent or paraffin wax to the periphery of the leg portions 6 and 6 of the top sheet 2 or a method of applying a hydrophilic compound such as an alkyl phosphate ester in advance and warming the periphery with warm water By the washing method, a water-repellent treatment can be performed to prevent leakage of urine or the like at the leg portions 6 and 6 around the periphery.

Further, the back sheet 3 used in the disposable diaper 1 of the present embodiment is preferably a liquid-impermeable sheet having a liquid-impermeable property that does not allow a liquid to permeate and a moisture-permeable property that allows a vapor to permeate.
Those having a feeling close to underwear are more preferable. As such a liquid impermeable sheet, for example, a composite material of a film and a woven fabric or a composite material of a film and a nonwoven fabric is preferable.

Absorber 4 used in disposable diaper 1 of the present embodiment
Is preferably a combination of a high-molecular-weight water-absorbing polymer mainly composed of defibrated pulp, and a heat-treated thermoplastic resin, cellulose fiber, and a high-molecular-weight water-absorbing polymer.

The elastic elastic members 7 and 8 used in the disposable diaper 1 of the present embodiment may be in the form of a thread or a band, and are preferably made of a material according to the elastic elastic member 10 described above.

Since the disposable diaper 1 of the present embodiment has the above configuration, when the disposable diaper 1 is worn, the gathers of the waist portions 5, 5 and the leg portions 6, 6 can be easily extended and worn, and When worn, the flexible top sheet 9 is securely caught in the crotch part by elastic elastic members 10, 10 so that the excrement is wrapped around the pocket 11 formed by gathers rising from the top sheet 2. Can be made, and the legs 6 and 6 that adhere to the groin
In combination with the function of the gathers, lateral leakage of excrement can be reliably prevented. In addition, the disposable diaper 1 in which the periphery of the leg portions 6 of the top sheet 2 is subjected to a water-repellent treatment,
There is no bleeding of the urine and the like at the leg portions 6 and 6 and the leakage of the urine and the like can be reliably prevented.

As described above, the top sheet 9 in the present disposable diaper 1 is already in an ideal wearing form in a product state, is extremely easy to wear, and has a wide design range of the gathering force of the gathers, so that the leakage prevention property is improved. Can be further enhanced. On the other hand, when the liquid-permeable top sheet is provided in the flat type diaper, the fitting property and the leakage prevention property can be improved by increasing the stretching force of the gathers of the top sheet, but the top sheet is not. The top sheet must be spread and mounted, and depending on the fastening position of the tape fastener, the front and rear side flaps come into contact with the top sheet and the top sheet is twisted and the waist and groin of the wearer May not be in close contact.

FIG. 6 is a view showing another embodiment of the present invention. In the disposable diaper 1 of the present embodiment, as shown in FIG. 2
All parts are configured in the same manner as in the above embodiment except that linear fixing parts 12, 12 are continuously joined and fixed from the front end part to the rear end part at points. According to this embodiment, since the top sheet 9 is fixed by the two linear fixing portions 12, 12, the top sheet 9 is stably used to remove excrement such as stool by the top sheet 9 during use. It can be wrapped securely, and lateral leakage can be more reliably prevented.

FIG. 7 is a view showing another embodiment of the present invention. As shown in FIG. 7, the disposable diaper 1 of this embodiment has a top sheet 9 having one center at both side edges and a rear end from a front end. All the components are configured in the same manner as in the above-described embodiment except that a broken-line-shaped fixing portion 12 is discontinuously joined and fixed over the end portion. In this embodiment as well, the same operational effects as in the disposable diaper 1 of the embodiment shown in FIG. 6 can be expected.

Moreover, the disposable diaper of the present invention may be one in which the fixing portion 12 of the top sheet 9 is partially joined and fixed in a dotted shape instead of a linear or broken line shape.

FIG. 8 is a view showing another embodiment of the present invention. As shown in FIG. 8, the disposable diaper 1 of this embodiment has elasticity along the joint fixing portions at the front and rear waist portions 5 and 5 at both ends. The elastic member 13 is attached to provide elasticity, and all other components can be configured according to the above embodiments.
The elastic elastic member 13 is interposed between the top sheet 2 and the back sheet 3. According to this embodiment, in addition to the functions and effects that can be achieved in each of the above embodiments, the elastic elastic members 13, 13 expand and contract following changes in body shape around the waist, and a stable wearing feeling can be obtained.

Further, the disposable diaper of the present invention may be one in which the top sheet 9 is loosely fixed to the top sheet 2 so as to be detachable from the top sheet 2 in each of the above embodiments. Needless to say, both the top sheet 9 and the top sheet 2 are fixed to the extent that they are not damaged during removal.

It should be noted that the present invention is not limited to the above-described embodiment at all, and is entirely included in the present invention unless departing from the gist of the present invention.

Next, the following leakage test was performed on the disposable diaper of the present invention using a specific invention product, and the effect of preventing leakage was observed.

(Test example)

The following leak test was performed using the following disposable diaper (invention product).

Test Example 1 In this test, the invention material 1 shown in FIGS. 1 and 5 was produced by using the following materials and providing the top sheet 9 in a state where the intermediate portion was not fixed.

Next, the following leak test was performed using the product 1 of the present invention, and the results are shown in Table 1 below.

・ Top sheet 2 Non-woven fabric made of polypropylene fiber (35g / m ² ) ・ Back sheet 3 Polyethylene film (40μ thickness) ・ Absorber 4 Fluff pulp and high absorbent polymer (polyacrylic acid)
Composite with Na crosslinker) ・ Top sheet 9 Heat-fused nonwoven fabric (30 g / m ² ) made of polyethylene / polypropylene composite fiber Leak test In this test, the invention product was mounted on a baby model 20 weighing 10 kg and laid down. After the state, the following artificial soft stool is supplied from the tubes 22 and 23 so that the discharge speed from the discharge unit 21 is 4 g / sec, and the test is performed to observe the effect of the absorber 4 to prevent leakage until leakage occurs. is there.

-Artificial loose stool: Bentonite 3 wt% suspension adjusted to a viscosity of 10 c.p. with carboxyethylene cellulose Test Example 2 In this test, a fine hole (1 mm
Perforated polyethylene film (thickness: 00 pieces / cm ² )
30 μ), and the same as the invention product 1 except that thread rubber (elongation rate: 150%) is attached to both side edges of the top sheet 9 and is continuously fixed in two lines inside the both side edges. Inventive product 2 shown in FIG. 6 was manufactured using the above materials, and then the above-described leak test was performed using Inventive product 2.
It is shown in the table.

Test Example 3 In this test, a flat rubber (elongation rate: 180%) was attached to both side edges of the top sheet 9 using a nonwoven fabric (20 g / m ² ) made of polyester fiber prepared by a water needling method as the top sheet 9. Inventive product 3 shown in FIG. 7 was prepared using the same material as inventive product 1, except that the material was fixed in a single line discontinuously at the center of both side edges. 3 was used for the above-mentioned leak test, and the results are shown in Table 1 below.

Test Example 4 In this test, all were the same as in Invention product 1 except that stretch elasticity was imparted by urethane spunbond (50 g / m ² ) 13 along the joint fixing portions at both ends of the waist portions 5 and 5. Inventive product 4 shown in Table 1 was prepared, and the above-mentioned leak test was performed using the inventive product 4, and the results are shown in Table 1 below.

Comparative Test Example 1 In this test, a comparative product 1 was produced using the same material as the invention product 1 without using the top sheet 9, and the same test as in the test example 1 was performed using the comparative product 1. The results are shown in Table 1 below.

Evaluation of leak test According to the results shown in Table 1 below, the products of the present invention 1 to 4
It can be seen that, compared to Comparative Product 1, all of them absorb a large amount of artificial soft stool and are excellent in leakproofness.

[Effects of the Invention] In the disposable diaper of the present invention, the gathers of the legs closely adhere to the inguinal region to reliably prevent lateral leakage of excrement and to securely capture and accommodate hardly absorbable excrement such as stool. It is a pants-type diaper that can be used.

[Brief description of the drawings]

1 is a perspective view showing an embodiment of the disposable diaper of the present invention, FIG. 2 is a plan view showing the inside of the disposable diaper of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. 4 is a cross-sectional view, FIG. 4 is a plan view of the front side showing a state in which the disposable diaper shown in FIG. 1 is developed, FIG. 5 is a cross-sectional view showing a curved state taken along line VV in FIG. 4, and FIG. And FIG. 7 is a diagram corresponding to FIG. 5 showing another embodiment of the disposable diaper of the present invention,
FIG. 8 is a perspective view showing still another embodiment of the disposable diaper of the present invention, and FIG. 9 is a front view showing a baby model used for a leak test. 1; disposable diaper, 2; top sheet 3; back sheet, 4; absorber 5; waist, 6; leg 7, 8, 10; elastic elastic member, 9; top sheet 9A; front end, 9B; rear end Department

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61F 13/15

Claims (3)

(57) [Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorber located between these two sheets, and front and rear waist portions and left and right leg portions formed around the absorber. In a pants-type disposable diaper having an elastic elastic member forming a gather and having front and rear waist portions bonded and fixed at both left and right ends, a liquid-permeable top sheet is placed on the top surface of the top sheet in an overlapping manner. A disposable diaper, characterized in that both front and rear ends of the top sheet are fixed to the top sheet, and elastic members are provided on both right and left side edges of the top sheet. 2. The top sheet is fixed to the top sheet from the front end to the rear end at two positions inside the front and rear end portions and the left and right side edge portions thereof. The disposable diaper described. 3. The disposable diaper according to claim 1, wherein said top sheet is detachably fixed to said top sheet.