JP2002102279A - Absorbing article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbing article such as a disposable diaper superior in earing feeling, wearing property, and leakage prevention performance in the waist part. SOLUTION: In this absorbing article which is provided with a liquid- permeable surface sheet 2, a liquid-impermeable rear surface sheet 3, and a liquid holding absorbing body 4, is substantially longitudinally long, is provided with elastic members 51a, 52a in the direction of width in the belly side part 1A, and has a waist three-dimensional guard 52B having an elastic member 52b in the direction of width in a back side part 1B and a pair of fastening tapes 8, 8 in both right and left side fringe parts of the back side part 1B, a ratio (B/A) of elongation stress B in the direction of width of the absorbing article in the back side part 1B to elongation stress A in the direction of width of the absorbing article in the belly side part 1A is 1.5 to 3.5, and a width of the waist three-dimensional guard 52B from its terminal to its free end is 5 to 100 mm.

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 excellent in a feeling of wearing, a wearing property, and a performance of preventing a waist from leaking.

[0002]

2. Description of the Related Art
As a disposable diaper, a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber are provided, and are substantially vertically long, and a three-dimensional guard having an elastic member on a back side in a width direction. Disposable diapers having a pair of fastening tapes on both left and right side edges of the back side are known. However, such conventional disposable diapers have relatively good wearability, and often have insufficient performance to prevent leakage from around the waist, and have excellent leakage prevention performance from around the waist. There is a problem that many of the diapers have inadequate wearability or are inferior in wearability. That is, at present, an absorbent article such as a disposable diaper, which is extremely easy to wear, and has an excellent feeling of wearing and preventing leakage from around the waist, has not yet been provided.

[0003] Accordingly, it is an object of the present invention to provide an absorbent article such as a disposable diaper which is extremely easy to be worn, and is excellent in a feeling of wearing and a performance of preventing leakage from around the waist (hereinafter referred to as a performance of preventing waist leakage). is there.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber, is substantially vertically elongated, and has Absorbent article in which the members are arranged in the width direction, the back side has a waist solid guard having an elastic member in the width direction, and a pair of fastening tapes on the right and left side edges of the back side. , The ratio (B / A) of the stretching stress B in the width direction of the absorbent article on the back side to the stretching stress A in the width direction of the absorbent article on the ventral side is 1.5 to 3.5,
The waist three-dimensional guard achieves the above object by providing an absorbent article having a width from a base end to a free end of 5 to 100 mm.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on a preferred embodiment. A disposable diaper 1 as one embodiment of the present invention includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-retentive absorber 4, is substantially vertically elongated, and has a ventral side. Elastic members 51a, 52a are arranged in the width direction in the portion 1A, and the back side portion 1B
Waist solid guard 52B having an elastic member 52b
Is a so-called deployable disposable diaper having a pair of fastening tapes 8 on the right and left side edges of the back side 1B.

More specifically, the disposable diaper 1 of the present embodiment has a concave shape on both left and right sides at the center in the longitudinal direction, and has an hourglass-like outer shape with the center confined as a whole. The topsheet 2 has a substantially rectangular shape having an outer dimension larger than that of the absorber 4, and a vertically elongated absorber 4 having a substantially rectangular shape is sandwiched and fixed between the topsheet 2 and the backsheet 3.

[0007] The back sheet 3 has a vertically long shape corresponding to the outer shape of the diaper, and both end portions and both side portions in the longitudinal direction of the back sheet 3 are both end portions 4a, 4a and both side portions 4b, 4b of the absorber 4, respectively. End sheet material 6 for forming a diaper end portion and side sheets for forming a diaper side portion are provided at both end portions and both side portions of the extended back sheet 3. Material 7 is stuck. The end sheet materials 6 and 6 and the side sheet materials 7 and 7 are
Are arranged so as to stand away from the topsheet 2 at the site where the waist solid guard 5 is provided on each of the abdominal part 1A and the back part 1B.
2A and 52B are formed in the width direction, and a pair of leg three-dimensional guards 54 and 54 are formed in the diaper 1 on the left and right sides in the longitudinal direction.

Elastic members 52a, 52b for forming gathers are provided on the waist solid guards 52A, 52B formed on the abdomen 1A and the back 1B, respectively.
Each of the elastic members 52a and 52b has a thread-like shape, and the free ends 56 of the three-dimensional guards 52A and 52B respectively.
Along the free end 56 in the vicinity. Also, a pair of leg three-dimensional guards 54 formed on the left and right sides in the longitudinal direction are respectively provided with elastic members 5 for forming gathers.
4a, 54a are provided, and each elastic member 54a, 5a is provided.
4a has a thread-like form, and is disposed near the free ends of the waist solid guards 54, 54 along the free ends.

In the present disposable diaper 1, the abdominal part 1
A, a waist solid guard 52 having an elastic member 52a
Since A is provided in the width direction, leakage from around the waist can be effectively prevented. Further, by having the waist solid guard 52A, it is possible to prevent the underwear of the wearer from accidentally entering the diaper and touching the excrement or the absorber, thereby making the wearer dirty. Further, it is possible to prevent the wearer from putting his / her hand in the diaper worn. Especially when the wearer is an infant, he often wants to put his hand in the diaper that is worn, but even in such a case, it is difficult to put his hand, so the hand does not touch the excrement or absorber Does not become unsanitary.

The abdominal part 1 of the disposable diaper 1
A and the waist opening edge portions (portions forming the peripheral edge of the waist opening portion when worn) 11 of the back side portion 1B include:
Elastic members 51a and 51b for forming waist gathers are arranged to form waist gathers 51A and 51B. Elastic members 51a, 51 for forming waist gathers
Each of b has a band-like form, and is fixed between the back sheet 3 and the end sheet material 6 at the waist opening edge 11 respectively. In addition, the edge of the leg opening (the part forming the peripheral edge of the leg opening when worn) 12
Is provided with an elastic member 53a for forming leg gathers, and the leg gathers 53 are formed. A plurality of elastic members 53a for forming leg gathers are provided at each of the left and right leg opening edges 12, and are fixed between the back sheet 3 and the side sheet material 7, respectively.
The elastic member 51a and the elastic member 52a of the present embodiment
Are arranged in the width direction on the ventral side 1A.

In the disposable diaper 1 of the present embodiment, the ratio (B) of the stretching stress B in the width direction of the diaper on the back side to the stretching stress A in the width direction of the diaper on the abdominal portion.
/ A) is from 1.5 to 3.5. The ratio of this elongation stress (B
If / A) is less than 1.5, the diaper cannot be sufficiently prevented from slipping or leaking from around the waist when urinating a large amount of urine, or the abdomen of the wearer is tightened to prevent them. The need arises and the wearer feels cramped or uncomfortable while wearing. The ratio of elongation stress (B / A)
If it is more than 3.5, the landing area (not shown) for fastening the fastening tapes 8, 8 provided on the outer surface of the abdominal part 1A may be curved or wrinkled.
Due to the shape collapse of the leg solid guard and the absorber,
It becomes difficult for a caregiver or the like to wear the diaper when wearing the diaper on the wearer. In the present specification, the “wearing feeling” means that no burden is applied so that the wearer can wear comfortably while wearing the diaper, and the “wearability” means that the parent or caregiver wears the wearer. This means that the diaper can be easily worn when worn.

From the viewpoint of obtaining particularly excellent wearing feeling, wearing properties, and performance of preventing waist leakage, the ratio of the elongation stress (B
/ A) is preferably from 2.0 to 3.0. Also,
From the viewpoint of obtaining particularly excellent wearing feeling, wearability, and performance of preventing waist leakage, the elongation stress in the width direction of the diaper in the abdominal portion 1A is preferably 50 to 500 gf,
The tensile stress in the width direction of the diaper at the back side 1B is 10
It is preferably from 0 to 1500 gf.

Here, the extensional stress A in the width direction of the diaper (absorbent article) in the abdominal part 1A and the extensional stress B in the width direction of the diaper (absorbent article) in the back part 1B are as follows. Measured.

<Extensional stress A in the width direction of the absorbent article in the abdominal part 1A> Measured using a Tensilon tensile tester (manufactured by Orientec Co., Ltd.). The distance between the initial chucks is set to a length obtained by subtracting 20 mm from the natural contraction length in the width direction of the abdominal portion 1A (the width in the natural state where the diaper is not extended), and the elastic member 5 disposed on the waist solid guard 52A.
2A (elastic members 51a for forming waist gathers), the both side edges 13A, 13A of the abdominal portion 1A located outside in the longitudinal direction of both elastic members 52a, 51a).
(See FIG. 3) A portion of a predetermined width is sandwiched between the chucks, and then the SS curve is measured by elongating the sample by 50 mm or more under the condition of a crosshead moving speed of 300 mm / min. The load obtained by subtracting the diaper load applied between the chucks before measurement is the abdominal part 1A.
In the width direction of the diaper (absorbent article). The width sandwiched between the chucks is desirably the maximum width of the portion where the elastic member is disposed, but the width may be arbitrary as long as the measured load does not change.

<Extensional stress B in the width direction of the absorbent article at the back side 1B> Measured using a Tensilon tensile tester (manufactured by Orientec Co., Ltd.). The space between the initial chucks is the natural contraction length in the width direction of the back side portion 1B (the length in the width direction in a natural state where the diaper is not extended), and the elastic member 52b or the waist gather formed on the waist solid guard 52B is formed. When the elastic member 51b is provided, the back side located outside in the longitudinal direction of the elastic member (in the case where both elastic members 52b, 51b are included, the outer side in the longitudinal direction of both elastic members 52b, 51b). Side edges 13B, 13 of portion 1B
B (see FIG. 3) except that a predetermined width portion (width in the direction along the longitudinal direction of the diaper, about 10 mm) is sandwiched between chucks.
The measurement is performed in the same manner as the measurement of the elongation stress in the width direction of the absorbent article in the abdominal part 1A.

In the disposable diaper 1, the back 1
B, the waist solid guard 52B has a width W from its base end 55 to its free end 56, as shown in FIG.
Is 5 to 100 mm, preferably 15 to 80 mm, and particularly preferably 20 to 60 mm. When the width W of the three-dimensional guard 52B is less than 5 mm, the effect of preventing leakage is insufficient or the wearing feeling is deteriorated. When the width W is more than 100 mm, the wearer lies on his back. The three-dimensional guard covers the upper surface of the absorber part below, so that the absorber is not effectively used, and the leak performance is reduced and the feeling of wearing is deteriorated. The waist solid guard 52B is
The base end 55 has a distance from the edge of the waist opening edge 11 in the back portion 1B of 100 mm or less, particularly 80 mm.
It is preferable to be in the area within.

The waist solid guard 52A formed on the abdominal side 1A has a width from the base end to the free end of 5 to 5 mm.
It is preferably 80 mm, more preferably 10 to
70 mm, particularly preferably 15 to 50 mm. It is preferable that the base end of the waist solid guard 52A be in a region where the distance from the edge of the waist opening edge 11 in the abdominal part 1A is within 80 mm, more preferably within 50 mm.

The waist solid guards 52A, 52B
Is preferably configured to cover each of the elastic members 52a and 52b with a sheet-like material such as a nonwoven fabric, a woven fabric, and a film, but may be formed by the elastic member alone. If the elastic member is in the form of a sheet having expansion and contraction, a desired effect can be exerted by itself, the amount of constituent members used can be reduced, and it is economical. In addition, a part of the waist solid guard has a thickness of 1 mm or more or has a space of 1 mm or more even in a state where the wearer is sleeping and crushed by the weight of the wearer. Is preferred. Thereby, the leak prevention effect can be effectively exhibited.

Also, when the disposable diaper 1 is unfolded in a plane as shown in FIGS.
The length L1 (see FIG. 3) of the elastic member 52b for forming the gather in B is longer than the length L2 (see FIG. 3) of the elastic member 51a for forming the waist gather disposed on the abdominal side 1A. Is preferred. When the length L1 of the elastic member 52b is longer than the length L2 of the elastic member 51a, the above-described desired effect is easily exerted, and the fit of the back side portion 1B is further improved.

In the present disposable diaper 1, the elastic members 52b arranged on the waist solid guard 52B on the back side 1B are connected at both ends to the fastening tapes 8, 8 or operatively. It is arranged at a position where it can interlock with the fastening tapes 8,8. That is, both ends of the elastic member 52b for gather formation are fixed to the fixing portions 8a, 8a of the fastening tapes 8, 8.
Or the distance from the fixing portions 8a, 8a in the width direction is within 50 mm.

The material for forming each member of the disposable diaper will be described. As a material for forming the top sheet 2, the back sheet 3, the absorber 4, the end sheet materials 6, 6, the side sheet materials 7, 7, and the fastening tapes 8, 8, a known material is appropriately selected without particular limitation. Can be used.

As the elastic members 52a, 52b, 54a disposed on the three-dimensional guards 52A, 52B, 54 and the elastic members 51a, 51b for forming waist gathers, various known elastic members can be used. As a form of the elastic member, in addition to a linear shape such as thread rubber,
A wide band (including flat rubber), a thin film, and a foam material can be used. Examples of the material for forming the elastic member include various known materials such as natural rubber, synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene (registered trademark), EVA, elastic polyolefin, and urethane. Can be used.

The elastic member 52b disposed on the waist solid guard of the back side 1B and the elastic member 51b for forming the waist gather of the back side 1B have different elastic characteristics from each other. It is preferable from the viewpoint of the performance of preventing the waist from leaking.

The disposable diaper 1 of the present embodiment can be used in the same manner as a normal deployable disposable diaper. Since the disposable diaper has the above-described configuration, the disposable diaper is excellent in a feeling of wearing, a wearing property, and a performance of preventing waist leakage. That is, the diaper does not slip off and the fit does not worsen, so that the wearer does not tighten the stomach unnecessarily while fitting the wearer appropriately, so that the wearer feels cramped when wearing the diaper. Does not cause discomfort such as discomfort. Since the landing areas provided on the outer surface of the abdomen 1A for fastening the fastening tapes 8 and 8 are curved, the areas are wrinkled, and the leg three-dimensional guard and the absorber are less likely to lose their shape. Caregivers and the like can easily wear the diaper on the wearer. In addition, since it is possible to provide solid gathers in which the diaper hardly slips off, has good fit, and has good fit to the skin, it is possible to effectively prevent leakage of excrement from around the waist.

Although a preferred embodiment of the present invention has been described above, the absorbent article of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. It is. For example, an elastic member for forming waist gathers may not be provided on the back side 1B, and only an elastic member for forming waist gathers or an elastic member for waist solid guard is provided on the abdominal side A. May be. Only leg gathers or leg three-dimensional guards may be disposed on both sides in the longitudinal direction of the diaper.

Further, the waist solid guard on the back side 1B and the elastic member arranged in the width direction of the abdomen 1A may be made of a stretchable sheet material.
In addition, by fitting the elastic members 51a, 51b, 52a, and 52b in a wavy shape, an arc shape, or the like, the fit around the waist or the waist can be improved. In addition, the present invention can be applied to inflatable disposable diapers for infants, infants and adults, as well as incontinence pads and sanitary napkins.

[0027]

The absorptive article of the present invention is extremely easy to wear, and is excellent in a feeling of wearing and performance of preventing waist leakage.

[Brief description of the drawings]

FIG. 1 is a plan view of a disposable diaper as one embodiment of the present invention, as viewed from a top sheet in an unfolded state.

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

FIG. 3 is a plan view of a diaper for explaining a method of measuring elongation stress.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Absorbent article (disposable diaper) 1A Abdominal part 1B Back part 1C Inseam 2 Top sheet 3 Back sheet 4 Absorbent 51A Abdominal waist gather 52A Abdominal waist solid guard 51B Back waist gather 52B Waist solid guard on back side 53 Leg gather 54 Leg solid guard 8 Fastening tape

Claims (3)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retentive absorber, are substantially vertically long, and have an elastic member arranged in a width direction on a ventral side. In an absorbent article having a waist solid guard having an elastic member on the back side in the width direction and having a pair of fastening tapes on both left and right side edges of the back side, the absorbent article has The ratio (B / A) of the stretching stress B in the width direction of the absorbent article to the stretching stress A in the width direction of the article is 1.5 to 3.5. The width from the edge to the free edge is 5 to 100
mm. 2. The absorbent article according to claim 1, wherein a waist three-dimensional guard having an elastic member is provided on the abdominal side in the width direction. 3. An elastic member for forming waist gathers is disposed at an edge of a waist opening on the abdominal side, and a length L1 of the elastic member on the back side is set to be equal to the elasticity for forming waist gathers. 3. The absorbent article according to claim 1, wherein the length is longer than a length L2 of the member.