JP2902502B2 - Disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable diapers for infants, adults and incontinent persons, and more particularly to so-called pants-type diapers.

[0002]

2. Description of the Related Art Generally, pants-type diapers are disclosed in
As disclosed in JP-A-207605, a vertically long main body including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these sheets is provided. Are divided into an abdominal part located on the abdominal side of the wearer and a dorsal part located on the dorsal side when worn. Then, in a pair of left and right side flaps formed on both sides along the longitudinal direction of the main body, the abdominal part and the back part are joined and fixed to each other to form a pair of left and right leg openings and one waist opening. .

[0003] This type of pants-type diaper is configured so that a pair of leg openings and a waist opening are formed to be extendable and contractible, respectively, so as to fit the body shape. Since it can be worn in a standing position, it is used for toilet training to promote the "diaper release" of infants, or for incontinent persons or adults who can walk.

[0004] Pants-type diapers are characterized in that they can be easily raised and lowered by themselves and easily worn by a caregiver as in ordinary underwear, compared to so-called flat-type diapers. In order to prevent the excrement from leaking and to make it easy to wear,
Pants-type disposable diapers are required to have excellent fit. Furthermore, it is required that the wearer has sufficient follow-up ability even for active activities of the wearer.

[0005]

However, in the conventional pants-type diaper, when the elastic member (elastic member) is uniformly arranged from the periphery of the waist opening to the periphery of the leg opening, the wearer's body is not provided. Since the shape is not uniform and has a substantially drum-shaped shape depressed between the crotch and the waist, it fits around the waist opening and around the leg opening, but around the torso of the wearer Has the disadvantage that it cannot be fitted sufficiently.

[0006] If the wearer cannot fit the wearer surely, there is a problem that the excrement leaks from a gap between the wearer and the diaper, the followability of the wearer is poor, and the diaper slips down. On the other hand, if the elasticity of the elastic member between the waist opening and the leg opening is uniformly increased according to the most difficult point of fit, the wearer will feel more pressure than necessary. There is a problem that the wearing feeling is remarkably inferior.

[0007] Accordingly, an object of the present invention is to provide a pants-type disposable diaper which is excellent in leakproofness of excrement of an absorbent article and excellent followability to a wearer.

[0008]

SUMMARY OF THE INVENTION The present invention comprises a body having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorber disposed between the two sheets, and The waist opening, a pair of leg openings, and a waist circumference are formed by joining and fixing both side edges of the abdomen located on the abdomen side and the back side located on the back side. In a pants-type disposable diaper in which a gather is formed in at least a part of a peripheral portion of the portion and the pair of leg openings and a peripheral portion of the waist peripheral portion, the waist opening peripheral portion, the leg opening peripheral portion, and the Unlike <br/> stretch stress of the body-surrounding portion around each of the direction, the waist opening periphery, said body-surrounding portion, the
Stress at the time of 20% extension of each part around the leg opening (width 5m
m, per 10mm length)
0g, stress at 50% elongation (5mm width, 10mm length
The maximum value of each is 20-150g, 100% elongation
The maximum value of stress at the time (per 5mm width, 10mm length)
It is obtained by achieving the above objects by providing a disposable diaper, characterized in 30~200g der Rukoto, respectively.

[0009]

According to the pants-type disposable diaper according to the present invention, the stretching stresses at the waist opening peripheral portion, the pair of leg opening peripheral portions, and the waist peripheral portion are different from each other, and the stretching stress is applied according to each portion. Therefore, it is possible to individually fit each body part in accordance with the body shape of the wearer, and to effectively prevent leakage and slipping without pressing the wearer.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred first embodiment of the present invention will be described below in detail with reference to FIGS. As shown in FIG. 1 and FIG. 2, the pants-type diaper 1 has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorber disposed between these two sheets. The body 5 is divided into an abdominal part 6 located on the abdomen of the wearer and a dorsal part 7 located on the dorsal side when worn. The side edges 6a, 6b, 7a, 7b of the back side 7 are joined and fixed to form a pants-type shown in FIG. 3, and a waist opening periphery A and a pair of leg openings periphery C are formed. It has become so.
Further, a waist peripheral portion B is formed between the waist opening peripheral portion A and the pair of leg opening peripheral portions C. The waist opening periphery A and each leg opening periphery C, respectively,
The telescopic members 11a, 11 are spaced apart from the absorber 4 by a certain distance.
b, 12a and 12b are stretched, and a waist gather 13 and leg gathers 14a and 14b are formed. In addition, as in the waist opening peripheral portion A and the leg opening peripheral portion C, the trunk peripheral portion B has elastic members 17a, 17b.
Are stretched to form a waist gather, but one end of the elastic members 17a, 17b extends over the absorber, and the other end extends to both side edges 6a, 6b, 7a, 7b.

The above-mentioned top sheet 2 absorbs excrement from the absorbent 4
It is preferable that the liquid-permeable sheet having a feel close to underwear is used as such a liquid-permeable sheet.
For example, a woven fabric, a nonwoven fabric, a porous film and the like are preferable.
Also, a method of applying a hydrophobic compound such as a silicone oil agent or paraffin wax to the peripheral portion of the top sheet 2 or a method of applying a hydrophilic compound such as an alkyl phosphate ester in advance and washing the peripheral portion with warm water are used. Water treatment,
Leakage due to bleeding of urine or the like at the peripheral portion can be prevented.

As the back sheet 3, a liquid-impermeable and vapor-permeable sheet which is made by adding a filler to a thermoplastic resin and stretched is used, and has a feeling similar to underwear, for example, a film and a nonwoven fabric. And a composite material of a film and a woven fabric. Absorber 4
Is preferably formed in an hourglass shape with a constricted substantially center, and the length L1 in the longitudinal direction is preferably 300.
The width L2 of the constricted portion is preferably 80 mm to 110 mm, and in this embodiment, about 90 mm. The width L3 on the ventral and back sides of the absorber 4 is preferably about 120 mm to 350 mm and about 160 mm in the present embodiment, and the width L4 of the side flap extending from the absorber 4 is preferably about 10 mm to 150 mm and about 100 mm in the present embodiment. The side edges L5 are preferably 5 mm to 30 mm, in this embodiment about 10 mm.

The material of the absorber 4 is preferably made of fibrillated pulp as a main material and combined with a high-molecular-weight water-absorbing polymer. In addition, a heat-treated thermoplastic resin, cellulose fiber, or a mixture of high-molecular-weight water-absorbing polymers Is preferred. The location of the high-molecular-weight water-absorbing polymer may be any of the upper layer, the middle layer, and the lower layer, and may be a mixture with pulp. The high-molecular water-absorbing polymer has a performance of absorbing and retaining a liquid at least 20 times its own weight, and is preferably in the form of particles having a gelling property. (Salt) A saponified product of a graft copolymer, a crosslinked product of sodium carboxymethyl cellulose, an acrylic acid (salt) polymer and the like are preferable.

In the main body 5, a pair of waist flaps 15a and 15b extending outward from both ends in the longitudinal direction of the absorber 4 and extending outward in the width direction from both edges of the absorber 4. A pair of left and right side flaps 16 are provided. Each waist flap 15a, 15b
Each of the above-mentioned elastic members 1 around the waist opening A
1a and 11b are stretched, and elastic members 12a and 12b of the periphery C of the leg opening are stretched on the pair of left and right side flaps 16 and 16, respectively.

Further, an elastic member 17 is provided between the waist opening periphery A and the leg opening periphery C at the trunk periphery B.
a and 17b are stretched. Then, the back flaps 16a and 16b are partially joined and fixed at both side edges of the side flaps 16a and 16b, and as shown in FIG. 3, a waist opening periphery A, a pair of left and right leg openings C, and a waist periphery. B is formed.

The waist flaps 15a and 15b and the side flaps 16 and 16 are respectively connected to the top sheet 2
And the backsheet 3 are formed integrally with the main body 5. Elastic members 11a, 11b, 12 stretched around waist opening periphery A and leg opening periphery C
a and 12b have a stretching ratio of 200% or more, and natural rubber,
It is continuously joined to the top sheet 2 and the back sheet 3 as a plurality of thread-like bodies or belt-like bodies made of synthetic rubber, polyurethane foam, or the like.

Accordingly, the elastic members 11a and 11b of the waist opening peripheral portion A are continuously arranged along the periphery of the waist opening peripheral portion A to form the waist gather 13. On the other hand, the elastic member 12a around the leg opening,
12b forms the leg gathers 14a and 14b when the leg opening peripheral portion C is formed. Also,
The elastic members 17a and 17b around the waist are also configured in the same manner as the elastic members 11a, 11b, 12a and 12b around the waist opening peripheral portion A and the leg opening peripheral portion C. It is formed so as to fit the waist circumference B around the wearer's waist.

The elastic member 11a around the waist opening A,
11b, and the elastic members 12a, 12 around the leg opening C
b and the elastic members 17a and 17b around the torso at the time of elongation of 20%, 50% and 100%, respectively. The same applies hereinafter) of 10 g to 120 g, 20 g to 150 g, and 30 g
It is preferable to use a material that exhibits an expansion stress of about 60 g, 140, and 220 g when the stretchable member of the present example elongates at 20%, 50%, and 100%, respectively.

As shown in FIG. 5, the waist opening periphery A, the waist periphery B, and the leg opening periphery C shown in FIG. 2 and FIG. It is provided corresponding to the vicinity c of the base of the crotch. Since the perimeter of the leg opening perimeter C passes over the groin of the wearer, it is greatly affected by activity and posture. That is, the infant's body generally has a waist portion b, a waist portion a, and a cylindrical shape (substantially drum-shaped) that is narrower than the c portion near the base of the crotch. , Waist opening periphery A> leg opening periphery C> torso periphery B, and the maximum change amount (ΔA, ΔB, ΔC) of waist opening periphery A, torso periphery B, and leg opening periphery C due to posture and activity )
Is △ A> △ C> △ B. At the same time, the stress applied to each of the above-described portions of the disposable diaper has a relationship of waist opening peripheral portion A> leg opening peripheral portion C> trunk peripheral portion B.

Depending on the posture, activity and wearing, the perimeter of each part in the disposable diaper of the present invention can be up to 20%,
At this time, as the physical properties of elasticity, each elasticity stress is 10% at the waist opening periphery A.
g to 120 g, preferably 10 to 120 g, and the periphery C of the leg opening is 20 g to 150 g, preferably 20 to 150 g.
g, trunk circumference B is 30 g to 300 g, preferably 30 g
If it is ~ 200 g, the wearer does not feel a feeling of oppression and is easy to wear, and there is no gap in the waist opening peripheral portion A and the leg opening peripheral portion C, and excellent slip and leak prevention performance. Can be demonstrated.

When the disposable diaper of the present embodiment is worn, the joints 6a, 6
b, 7a and 7b are overlapped and joined to form a pants-type as shown in FIG. In this pants-type state, the wearer wears the leg of the wearer by pulling it up through the waist opening periphery A and subsequently the leg opening periphery C. In the worn state, the waist opening a is located around the waist a of the wearer, the waist opening B is located near the waist of the wearer, the leg opening C is located near the crotch base c, and the waist opening is located around the waist. A, a waist gather 13, leg gathers 14a and 14b, and a waist gather 17 are formed at A, a pair of leg opening surroundings C, and a waist surrounding B, respectively.

In this case, each of the gathers 13, 14a, 14
Since b and 17 apply elastic stress to the corresponding body peripheral lengths so as to properly fit according to the characteristics at the time of wearing, etc., the wearer may feel a feeling of oppression. There is no. In addition, since it has elastic properties in accordance with the posture and activity of the infant, there is no gap between the waist opening peripheral portion A and the leg opening peripheral portion C, and excellent slip and leak prevention performance is exhibited. .

The circumference of the waist opening periphery A is:
In general, it is known that a maximum of about 5 cm changes depending on the posture of the wearer. However, since the circumference of the torso perimeter B passes from above the hipbone to the buttocks, it is not significantly affected by the posture of the wearer. Further, in the first embodiment described above, no elastic elastic member is interposed between the gathers 14a, 14b of the leg opening peripheral portion C and the gather 17 of the trunk peripheral portion B, that is, the leg opening peripheral portion. C elastic members 12a, 12b;
No other elastic member is arranged between the elastic members 17a and 17b of the torso peripheral portion B.

The width of the area where such an elastic member does not exist is 10 to 100 mm, preferably 10 to 70 mm. Thus, the gathers 14a and 14
b and the gathers 17 of the torso periphery B do not hinder the function of the wearer's leg by the elastic member, and further, the gathers 17 of the torso periphery B and the leg opening periphery Since the gathers 14a and 14b of C operate independently without being affected by others, the elastic properties of the gathers 17, 14a and 14b are not damaged. Therefore, according to the disposable diaper of the first embodiment, an excellent fit can be obtained.

Next, a second preferred embodiment of the present invention will be described. In the second embodiment, the expansion and contraction stresses of the back side and the abdomen in the waist opening peripheral portion A are different from those of the first embodiment described above, and the other points are the same as those of the first embodiment. The configuration is substantially the same as that of the first embodiment. That is, the elastic stress of the elastic member 17b on the back side and the elastic member on the ventral side in the waist opening peripheral portion A are set to be different from each other, but the elastic member 17b on the back side is set.
The degree of the difference between the stretching stress of the stretching member 17a on the abdominal side and
Different types of diapers, for example, for infants and adults, and for thin and obese types, etc., so they are not specified unequivocally. Is convenient in fit and handling. This is because the change in abdominal circumference due to posture is mainly caused by expansion and contraction of the abdominal part.To follow this, it is necessary to increase the stress on the abdominal part, On the other hand, when the caregiver wears and removes the swaddling, the operation is easier if the stress on the abdomen is higher. Specifically, it is desirable that the stress of the gathers on the abdominal part is set higher than that on the dorsal part by 10 to 140 g, preferably 10 to 90 g, on the abdominal part.

The elastic member 1 around the waist opening A
Each of the stresses 7a and 17b is caused by the elastic member 11b on the back side and the elastic member 1 on the abdominal part around the waist opening periphery A.
The maximum value of stress (per 5 mm in width and 10 mm in length) at 20% elongation of 1a is 10 to 120 g, preferably 1 to 120 g, respectively.
0-60g, stress at 50% elongation (width 5mm, length 10mm
Per) is 20 to 150 g, preferably 20 to 100 g, and the maximum value of stress (per 5 mm in width and 10 mm in length) at 100% elongation is 30 to 200 g, respectively.
Preferably, the one in the range of 30 to 150 g is used.

According to the pants-type disposable diaper according to the second embodiment, at the periphery of the waist opening,
Since the stretching stress on the abdomen and back is different and the stretching stress is applied according to each part, it fits each part of the body according to the wearer's body shape or activity, without pressing the wearer Leakage and slippage can be effectively prevented.

When the disposable diaper according to the second embodiment is used as an adult diaper, even when the wearer is bedridden, the stretching stress on the abdominal side is higher than that on the back side, so that the diaper can be put on and taken off. It's easy to do. The present invention is not limited to the above-described embodiment, and can be variously modified without departing from the gist of the present invention.

For example, the elastic member 17
The arrangement of a and 17b is not limited to a part, but may be arranged over the entire periphery as shown in a development view in FIG. Also, the waist opening periphery A and the leg opening periphery C may be partially or intermittently arranged with the elastic member.

[0030]

The disposable diaper of the present invention is excellent in the basic performance of the absorbent article, that is, the excrement leakage prevention and followability to the wearer. Furthermore, even when worn by a caregiver, since the elastic properties of the side portions are not uniform, the operation is easy even when worn.

[Brief description of the drawings]

FIG. 1 is a development view of a disposable diaper according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view showing substantially half of the disposable diaper shown in FIG.

FIG. 3 is a perspective view showing a disposable diaper shown in FIG. 1 in a worn state.

FIG. 4 is a development view of a disposable diaper according to another embodiment of the present invention.

FIG. 5 is a diagram showing a location corresponding to a wearer of a disposable diaper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pants type diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Main body 6 Abdominal part 7 Back side 6a, 6b, 7a, 7b Side edges A A waist opening B B waist C leg opening

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A61F 13/15-13/64 A61F 5/44

Claims (6)

(57) [Claims] 1. An abdominal portion located on the abdomen of a wearer, comprising a main body having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the two sheets. And the both side edges of the back side located on the back side are joined and fixed to form a waist opening, a pair of leg openings and a waist circumference, and the waist opening and the pair of leg openings respectively. In a pants-type disposable diaper having gathers formed in at least a part of the periphery of the opening and at least a part of the periphery of the waist, the waist opening, the leg opening, and the periphery of the torso stretch stress Ri is Do different, the waist opening periphery, said body-surrounding portion, the leg opening
Stress at the time of 20% elongation of each part around the mouth (width 5 mm, length 1
(Per 0 mm) are 10 to 120 g, 50
Maximum value of stress (per 5mm width and 10mm length) at% elongation
Are 20 to 150 g, respectively, and the stress (width
5mm, 10mm in length) 30 ~ 2 each
Disposable diapers characterized by 00g der Rukoto. 2. The stress at the time of 50% elongation of each part in the waist opening peripheral part, the torso peripheral part, and the leg opening peripheral part is as follows: waist opening peripheral part> leg opening peripheral part> body peripheral part. The disposable diaper according to claim 1, wherein the diaper has a relationship. 3. The maximum value of stress (per 5 mm in width and 10 mm in length) at the time of elongation of 20% in each of the periphery of the waist opening, the periphery of the torso, and the periphery of the leg opening is 10.
６０60 g, maximum stress at 50% elongation (per 5 mm in width and 10 mm in length) is 20 そ れ ぞ れ 100 g, and maximum stress at 100% elongation (per 5 mm in width and 10 mm in length) is 30１００150 g, respectively 2. The method according to claim 1, wherein
Or the disposable diaper described in 2. 4. A gather is formed at each of the leg opening peripheral portion and the trunk peripheral portion, and a region between the gather at the leg opening peripheral portion and the gather at the trunk peripheral portion includes: The disposable diaper according to any one of claims 1 to 3 , wherein no elastic elastic member is present. 5. The area not the resilient and elastic members are present along the body-surrounding portion, claim 1 to a disposable diaper according to any one of 4, characterized in that it is formed with a width of 10 to 100 mm. 6. 50% elongation at the stress of the dorsal and the ventral in the waist opening periphery portion, different disposable diaper according to any one of claims 1 to 5, characterized in.