JPH10179634A - Disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper which shows reliable fitting properties in preventing the diaper from slipping down even after the absorption of excreta and is free from the twisting of an absorber and further is exceedingly moistureproof. SOLUTION: This diaper 1 is equipped with a front sheet 2, a back sheet 3 and an absorber 4. In addition, waist gathers are formed of a waist part elastic member 7 arranged on a pair of front/back waist parts C, C' and the waist part elastic member 7 is arranged linearly. Pleural body part elastic members 10 for forming body part gathers are arranged between the waist part elastic member 7 positioned on the back waist part C' and the end part of the absorber 4. The body part elastic members 10 are arranged, individually in a curved form, so that the intervals between individual body part elastic members 10 are narrowest almost in the center of the longitudinal direction of each of the members 10. At least, the body part elastic member 10a in closest proximity to the absorber 4 is arranged in such a manner that both end parts 10a' of the member 10a are positioned alongside of the absorber 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper for infants or adults, and more particularly, to a diaper that does not slip off and that an absorbent body does not sway.
The present invention relates to a disposable diaper having excellent fit.

[0002]

2. Description of the Related Art Conventionally, as a disposable diaper, a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these two sheets have been used. Disposable diapers having a pair of front and rear waist gathers, which are provided with a pair of front and rear waist gathers, respectively, are provided on a pair of front and rear waist portions located at the waist of the wearer when worn. In such a disposable diaper, in order to improve the fit of the diaper, a waist gather is formed by disposing an elastic member so as to overlap with the absorber at a portion positioned around the wearer's waist. However, even in a disposable diaper having such waist gathers, it has been desired to improve fit so that the diaper does not slip down even after absorbing excrement. Also, in order to improve the fit to satisfy such requirements,
When the elastic force of the elastic member forming the waist gathers is increased, there is a problem that the absorber tends to be twisted.

[0003] Accordingly, an object of the present invention is to provide an excellent fit so that the diaper does not slip down even after absorbing excrement, and furthermore, the absorbent is not distorted and the leakproofness is excellent. To provide disposable diapers.

[0004]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, have bent the elastic member so that both ends are located in the region where the absorber is arranged.
In addition, it has been found that a disposable diaper in which the central portion is located in a region where the absorber is not disposed so that the elastic member is not disposed substantially overlapping with the absorber can achieve the above object.

[0005] The present invention has been made based on the above findings, and comprises a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these two sheets. In a disposable diaper having a waist gather formed at least at a rear waist in a pair of front and rear waist parts located at a wearer's waist when worn, the waist gather is formed, The body elastic member is linearly arranged, and a body elastic member for forming a body gather is provided between the waist elastic member provided at the rear waist and an end of the absorber. Are arranged, and the plurality of body elastic members are arranged in a curved manner so that the interval between the body elastic members becomes substantially narrow at a substantially central portion in a longitudinal direction thereof. In other words, at least the trunk elastic member provided at the position closest to the absorber is disposed so that both ends thereof are located on the sides of the absorber, and the disposable diaper is provided. .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the disposable diaper of the present invention will be described below in detail with reference to the drawings. Here, FIG.
1 is a developed plan view showing one mode of the disposable diaper of the present invention. FIG. 2 is a perspective view showing an aspect when the disposable diaper shown in FIG. 1 is used.

The disposable diaper 1 of the present embodiment shown in FIG.
Liquid permeable top sheet 2 and liquid impermeable back sheet 3
And an absorber 4 interposed between the two sheets 2 and 3. Both the pair of front and rear waist portions C and C ′ located at the waist of the wearer when worn are provided for forming waist gathers. The waist elastic members 7, 7 are arranged to form waist gathers. In FIGS. 1 and 2, waist gathers and a torso gather, which will be described later,
It is abbreviated.

The disposable diaper 1 shown in FIG. 1 will be described in further detail. As shown in FIGS. 1 and 2, the disposable diaper 1 is formed by constricting a central portion in a longitudinal direction.
It is made like an hourglass overflowing as a whole. That is, the top sheet 2 and the back sheet 3 have an overflowing hourglass shape. The absorber 4 has a rectangular shape. In addition, the absorber 4 is provided with the topsheet 2.
The front sheet 2 and the back sheet 3 are fixed via an adhesive or the like.

[0009] Fastening tapes 5 for fastening diapers are provided on both left and right side edges of the back portion B located on the back side of the wearer when worn, and are positioned on the abdomen of the wearer when worn. At a substantially central part of the abdominal part A, a landing tape 6 for attaching the fastening tape 5 is provided. In addition, leg part E located around the leg when worn
Is provided with a leg elastic member 8 made of a normal elastic member to form a leg gather (see FIG. 2). These configurations are the same as those of a generally known disposable diaper.

As a material for forming the top sheet 2, the back sheet 3 and the absorber 4, a known material can be used without any particular limitation. Examples of the fastening tape 5 include a tape in which a normal adhesive is applied on a normal tape base material to form a fastening portion 5a, a "magic tape" (trade name, manufactured by Kuraray Co., Ltd.), and the like. A tape or the like in which the male member of the mechanical fastener is disposed and the fastening portion 5a is formed is used. In the case where the fastening portion 5a is formed of the adhesive portion, a tape that has been subjected to a normal peeling process is used as the landing tape 6; When formed by a male member, a female member of a normal mechanical fastener is used.

As shown in FIG. 1, in the disposable diaper 1 of the present embodiment, the waist elastic member 7 is
A torso elastic member 10 for forming a torso gather is provided between the waist elastic member 7 and the end of the absorber 4, which are linearly arranged, and are arranged at the rear waist C ′. Are arranged, and the plurality of body elastic members 10 are arranged so as to be curved so that the interval between the body elastic members 10 becomes the narrowest at a substantially central portion in the longitudinal direction. The body elastic member 10a provided at least by the absorber is disposed such that both ends 10a 'are located on the sides of the absorber 4.

More specifically, the waist elastic members 7, 7 are provided two at each of the front and rear waist portions, and the waist elastic members 10 (10a, 10b, 10c,
10d) is provided four. In the present invention, the waist portions C and C ′ are portions that form a waist opening when the diaper is assembled as shown in FIG. 2 and have a range of 5 to 20 mm from the longitudinal end of the diaper. Means inside. The torso D is a portion located around the wearer's waist (lower abdomen) at the time of wearing, and is within a range of about 100 mm from the lower ends of the waist parts C and C ′ (a belt-like part having such a width). Area).

Further, the four body elastic members 10a, 1
0b, 10c, and 10d are arranged with different curvatures. In the present embodiment, the body elastic members 10a provided closest to the absorber are arranged so that the curvature rate decreases in order. By arranging with a different curvature as in the present embodiment, both ends of the body elastic member can be arranged over a wide area as shown in FIG. 1, thereby improving the fit. Becomes Specifically, the curvature of each trunk elastic member 10 is preferably 0.03 to 0.2, and the curvature of the trunk elastic member 10a is 0.03 to 0.2.
5 to 0.2, and the trunk elastic member 1
The relationship of 0a, 10b, 10c, and 10d is that the curvature of the trunk elastic member 10a> the curvature of the trunk elastic member 10b> the curvature of the trunk elastic member 10c> the curvature of the trunk elastic member 10d. preferable. The curvature is a value obtained by dividing the maximum amplitude value S of the trunk elastic member by the arrangement length L of the trunk elastic member. In addition, each trunk elastic member 10a, 10b, 10
c, 10d, the intervals d at the substantially central portions in the longitudinal direction are almost equally spaced, and preferably 2 to 7 mm.

In this embodiment, the body elastic member 10
The curvature of “a” is 0.08, the curvature of the trunk elastic member 10b is 0.06, the curvature of the trunk elastic member 10c is 0.05, and the curvature of the trunk elastic member 10d is 0.05. The curvature is 0.03, and the distance d between the body elastic members is 4 mm.

In the present embodiment, the two body elastic members of the body elastic member 10a provided closest to the absorber 4 and the body elastic member 10b adjacent to the body elastic member 10a are: The two ends 10a 'and 10b' are
It is arranged so that it may be located beside. As used herein, the term “side” refers to a side of the absorber in a region located on the absorber 4 side by both ends in the longitudinal direction of the absorber 4 (a dashed line portion shown in FIG. 1), as shown in FIG. Means

Here, as the waist elastic member 7, a rubber thread or a band-shaped elastic member can be used, and a normal elastic material can be used without any particular limitation as a forming material. The body elastic member 10 is made of thread rubber, and a normal rubber material can be used without any particular limitation. Further, the body elastic members 10a, 10b, 10c,
The extension rate of 10d and the waist elastic member 7 is 1.3 to
It is preferably 2.0. Here, the extension ratio is obtained by dividing the length of the elastic member in the extended state (arranged state) by the length in the contracted natural state (initial length).

The disposable diaper 1 of the present embodiment can be used in the same manner as a normal unfoldable disposable diaper. Since the body elastic member 10 is provided as shown in FIG. There is an effect of lifting the diaper, and the absorber 4 is not distorted by the body elastic member 10 and is excellent in fit. Further, since the waist elastic member 7 and the body elastic member 10 are arranged so as to be connected to the fastening tape 5, the elasticity of the body elastic member 10 is interlocked with the fastening tape 5,
This further improves the fit. Furthermore, since the trunk | drum elastic member 10 is arrange | positioned densely between the waist part C 'and the absorber 4, the fitting property is improved more and the leak prevention function is further improved.

The disposable diaper 1 of the present embodiment is shown in FIGS.
Except that the trunk elastic member is provided as curved as shown in
It can be manufactured in the same manner as a normal disposable diaper.

It should be noted that the disposable diaper of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the spirit of the present invention. For example, the torso elastic members 10 may be arranged to be curved at the same curvature. Further, the trunk elastic member 10 can be provided not only on the back side B but also on the abdominal side A. Further, the number of the body elastic members 10 is not limited to four, but may be two, three, or five or more. As for the waist elastic member 7, the number when using the thread rubber is not two at each of the front and rear,
The number can be one, three, four or more, and the number provided at the front and rear waist portions can be changed.

[0020]

Industrial Applicability The disposable diaper of the present invention has an excellent fit so that the diaper does not slip down even after absorbing excrement, and furthermore, the absorbent is not distorted and the leakage is excellent. It is a thing.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing an aspect when the disposable diaper shown in FIG. 1 is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Absorber A Abdominal part B Back part C, C 'Waist part D Body 5 Fastening tape 5a Fastening part 6 Landing tape 7 Waist elastic member 8 Leg elastic member 10 Torso elastic member

Claims (1)

[Claims] 1. A front and rear pair comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these two sheets, which are located on the waist of a wearer when worn. In a disposable diaper in which a waist gather is formed at least at a rear waist portion of the waist portion and a waist gather is formed, the waist elastic member is linearly arranged. A plurality of torso elastic members for forming a torso gather are disposed between the waist elastic member disposed at the rear waist and the end of the absorber, and a plurality of torso portions are provided. The elastic members are arranged so as to be curved so that the interval between the body elastic members is substantially the smallest at the substantially central portion in the longitudinal direction, and at least the elastic member is provided at the position closest to the absorber. The waist elastic member, disposable diaper, characterized in that both end portions are arranged so as to be positioned on the side of the absorber, it.