JP3343189B2 - Disposable pants-type body fluid-absorbing wearing article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the close adhesiveness of the vicinal part of the end edge of a core by making the arranging interval dimension of elastic members in a first girth region demarcated within a specific dimension range becoming the boundary of the front end edge of the core smaller than that of the elastic members in a second girth region. SOLUTION: A front region 7B has a girth region 7B1 demarcated within respective upper and lower max. 20mm ranges becoming the boundary of the front end edge 4A of a core 4, the girth region 7B2 demarcated by the girth region 7B and both side opening parts 12 and the girth region 7B3 demarcated between the girth region 7B and a body opening edge 17. A large number of elastic members 15 extend in a peripheral direction in the girth regions 7B1 , 7B2 , 8B3 to be arranged so as to leave an interval in a vertical direction and fixed to the inner surface of the surface sheet 2 and the inner surfaces of upper and rear surface sheets 2, 3 in a stretched state. The arranging interval dimension of the elastic members 15b in the girth region 7B1 is set smaller than that of the elastic members 15c in the girth region 7B2 .

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to disposable pants-type body fluid-absorbing wearing articles such as disposable pants-type diapers, training pants and incontinence pants.

[0002]

2. Description of the Related Art Conventionally, a pants-type body fluid-absorbing wearing article of this kind has elastic members disposed at a waist opening edge and a pair of left and right leg opening edges, and a circumferential direction is provided at each opening edge. It has elasticity. In addition, an elastic member is arranged widely in the vertical direction from the waist direction opening edge to the crotch region, and a pressing force is applied from outside to a required portion where the liquid-absorbent core of the wearing article is located, and the inside of the portion is worn. There is also known an article which is brought into close contact with the body of a person.
50, 4-289201.

[0003]

In order to prevent leakage of bodily fluids based on the above-mentioned known articles by closely contacting a required portion where a core is located with a body, an elastic member around the torso widens the circumference of a wearer's torso. It may be overwhelmed and impair the wearing feeling of the article. However, in order to prevent leakage of bodily fluids, instead of tightly contacting the entire area where the core is located, only the peripheral edge thereof may be tightly contacted, and in such a case, the feeling of wearing is reduced.

Accordingly, an object of the present invention is to improve the adhesion at least in the vicinity of the edge of the core.

[0005]

According to the present invention, there is provided a liquid absorbing core having front and rear edges and both side edges, and both end edges and both side edges of the core covering both surfaces of the core. A laminate is formed from a liquid-permeable top sheet and a liquid-impermeable backsheet extending from the front side area, the rear side area, and the crotch area extending between the front and rear side areas. Having both sides of the front and rear side regions joined in a state in which the laminate is folded in the longitudinal direction, a trunk opening,
A pair of leg openings are defined, and a number of elastic members are arranged in the front and rear side regions including the trunk opening and the leg openings in a direction around them and spaced apart in the vertical direction. To improved disposable pants-type body fluid-absorbing wearing articles.

[0006] One feature of the present invention is that at least the front side region of the front and rear side regions is defined by a first waist region defined by a maximum of 20 mm in each of the upper and lower regions bordering the front edge of the core, A second waist region defined between the first waist region and the two leg openings, and a third waist region defined between the first waist region and the torso opening And the arrangement spacing of the elastic members in the first waist region is smaller than the arrangement spacing of the elastic members in the second waist region, and the elasticity in the first waist region is reduced. Material
Elastic members in the second waist region
And the cross-sectional area and elongation stress of each of the elastic members in the third waist region are made larger than each of the elastic members in the first and second waist regions. Is to be.

Another feature of the present invention is that the elastic members in the first and second waist regions are substantially equal to each other with respect to their cross-sectional area and elongation stress.

[0008]

Still another feature of the present invention is that
Its longitudinal dimension including the leading edge of said core at least 10
The thickness of the core in the front end region of mm decreases gradually toward the front end edge.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disposable pants-type diaper will be described as an example of a disposable pants-type body fluid-absorbing wearable article according to the present invention with reference to the accompanying drawings.

In FIG. 1, the diaper comprises a laminate 1. The laminate 1 is composed of a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-absorbent core 4 disposed between these sheets. The core 4 is formed in an hourglass or I shape, and has front and rear edges 4A, 4B and both side edges 4C. The front and back sheets 2, 3 are formed in such a size that their peripheral edges extend from the peripheral edge of the core 4, and their extended portions are joined to each other so that the side flaps 6 are formed.
A, 6B and both end flaps 6C, 6D are formed. Such a laminated body 1 is located substantially at the center thereof and has front and rear side regions 7B, 7 via a narrow crotch region 7A.
C. The laminate 1 is folded in the crotch region 7A so that the topsheet 2 is located on the inner surface of the diaper, and is joined by the joining means 10 on both side edges of the front and rear side regions 7B and 7C. ,
A pair of leg openings 12 are defined. Body opening 11
Elastic members 15 and 16 are attached to the front side region 7B and the leg opening 12 so as to expand and contract in the circumferential direction.

In FIG. 2, the core 4 in the front side region 7B is shown.
Is near its front edge 4A, including its front edge 4A.
Is formed in a shape in which the thickness of the front end region of at least 10 mm gradually decreases toward. Such a shape is obtained by reducing or compressing the material at the relevant portion of the core 4 toward the front edge 4A. The front and back sheets 2 and 3 extending from the front edge 4A are joined to each other to form a trunk opening edge 17. Although not shown, it should be understood that the rear area 7C is similarly configured.

[0013] front zone 7B are upper and lower maximum 20mm to boundary front edge 4A of the core 4, preferably the waist regions 7B1, defined in the range of 15～10Mm, waist region 7B ₁ and two leg openings the waist region 7B ₂ defined between the 12,
And a waist region 7B ₃ defined between the waist regions 7B ₁ and cylinder opening edge 17. Around the waist 7B ₁ , 7B ₂ ,
The 7B _3, a large number of elastic members 15 extend to their surrounding direction, are arranged at intervals to their longitudinal direction, the inner surface of the inner or the top- and backsheets 2, 3 topsheet 2 in a stretched state Fixed. Each of the elastic member 15a in the waist region 7B _3, the elastic member 15b in the waist region _7B 1, 7B _2, than each of 15c, is set to be larger with respect to their cross-sectional area and tensile stress. 7B around the waist
Each of the elastic members 15b and 15c in ₁ , 7B ₂
Have been substantially equal to each other with respect to their cross-sectional area and the tensile stress, the elastic member 1 in the waist region 7B ₁
SEQ spacing dimension of each 5b is set smaller than the arrangement interval dimensions of each of the elastic members 15c in the waist region 7B _2, therefore, with respect to the surface pressure per given area, waist region 7B ₁ has waist regions 7B _It is larger than ₂ .
Elastic member 15 in waist circumference regions 7B ₁ , 7B ₂ , 7B ₃
The b, 15c, and 15a have a 50% elongation stress per 150 mm in length of 5 to 50 g, and are mounted at an elongation ratio of 1.1 to 2.5 times.

Regarding the surface pressure per fixed area, the waist area 7
In the embodiment B ₁ is larger than waist region 7B _2, during wear of the diaper, the front edge 4A and proximity thereof of the core 4 located on waist regions 7B ₁ is the stiffness of the core 4 Hence there is no departing from the skin of the wearer, in other words, despite the rigidity of the core 4, the advantage of strong adhesion to the skin than the waist region 7B _2. However, on the other hand, increasing the surface pressure in only a part of the area may give the wearer an uncomfortable feeling. Therefore, with respect to surface pressure per given area, while equal waist region 7B _1, 7B ₂ are substantially, with respect to adhesion to the skin, that waist region 7B ₁ is better than waist region 7B ₂ preferable. To accomplish this, as in the above examples to less than that of the elastic member 15c of the array spacing dimension of each waist region 7B ₂ of the elastic member 15b of the waist region 7B _1, waist region each of the extension stress of the elastic member 15b of 7B ₁ may be decreased appropriately than that of each of the elastic member 15c of the waist region 7B _2. To this way small, waist region _7B 1, 7B ₂ of resilient members 15b, 15
with substantially equal respective material and cross-sectional area of the c, or each of the extension magnification of the elastic member 15b of the waist regions 7B ₁ is made smaller than that of each of the elastic member 15c of the waist region 7B _2, Elastic member 15 of waist area 7B ₁ , 7B ₂
b, and the cross-sectional area of each of the elastic members 15b of the waist regions 7B ₁ may be decreased as appropriate than that of the elastic member 15c of the waist region 7B ₂ with substantially equal material and elongation magnification 15c.

The cross-sectional shape of the elastic member 15 may be any of a circular shape and a square shape, but it is preferable that the cross-sectional shape be larger in width (diameter) than in thickness (diameter).

In the above description, the front area 7B is described. However, it is needless to say that the rear area 7C may have the same configuration as the front area 7B or a slightly different configuration.

In the diaper constructed as described above, the elastic members 15 are arranged closely and narrowly above and below the front edge 4A of the core, and the core 4 is reliably placed in the skin where the front edge 4A and its vicinity are located. The body fluids that are excreted
It does not leak out from the front edge 4A. Body circumference area 7B ₃
The elastic member 15a extends in the entire width direction of the front and rear side regions 7B and 7C so as to be substantially continuous in the waist direction.

[0018] Instead of the elastic member 15b of the waist region 7B _1,
It is possible to use one or more relatively wide band-like elastic members to improve the adhesion between the front end edge 4A of the core and the vicinity thereof, but in order not to hinder the air permeability inside and outside the diaper. It is preferable to use a material having moisture permeability.

In the present invention, a non-woven fabric or a perforated plastic film is used for the top sheet 2 and the back sheet 3 is used.
For example, a plastic film such as polyethylene can be used. The core 4 may be formed by pulverized pulp or a mixture of pulverized pulp and superabsorbent polymer powder formed into a required shape by a known or well-known technique. A material having rubber elasticity such as rubber or plastic elastomer can be used for the elastic members 15 and 16.

[0020]

In the wearing article according to the present invention, the arrangement intervals of the elastic members in the vicinity of the edge of the core are smaller than those of the elastic members in other parts of the core. The portion where the edge and the vicinity thereof are located can be securely brought into close contact with the body of the wearer, and body fluid can be prevented from leaking from the edge without impairing the wearing feeling of the article. Also, when the thickness in the vicinity of the edge of the core is gradually reduced toward the edge, the step generated between the core and the body is smaller than in the case where the core is not so, and the appearance when worn is good. is there.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a pants-type diaper.

FIG. 2 is an end view taken along line II-II of FIG.

[Explanation of symbols]

Reference Signs List 1 laminated body 2 top sheet 3 back sheet 4 core 4A front edge 7A inseam area 7B front side area 7C rear side area 7B ₁ first waist area 7B ₂ second waist area 7B ₃ third waist area 15 elastic member 16 elasticity Element

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61F 13/15-13/84

Claims (3)

(57) [Claims] 1. A liquid-absorbent core having front and rear edges and both side edges, a liquid-permeable top sheet and a liquid-impermeable back surface which cover both sides of the core and extend from the both ends and both side edges of the core. A laminate is formed from the sheet, and the laminate has a front side area, a rear side area, and a crotch area extending between the front and rear side areas, and the laminate is folded in its longitudinal direction. By being joined at both sides of the front and rear side area in the state, the trunk opening,
A pair of leg openings are defined, and a number of elastic members are arranged in the front and rear side regions including the trunk opening and the leg openings in a direction around them and spaced apart in the vertical direction. In the disposable pants-type bodily fluid-absorbing wearing article, at least the front side region of the front and rear side regions is defined by a first waist region defined by a range of a maximum of 20 mm at each of upper and lower borders of a front edge of the core. A second waist region defined between the first waist region and the two leg openings; and a third trunk defined between the first waist region and the waist opening. A peripheral region, wherein the arrangement intervals of the elastic members in the first waist region are smaller than the arrangement intervals of the elastic members in the second waist region, and the first waist region. In
Elongational stress of the elastic member in the second waist area
And the cross-sectional area and the elongation stress of each of the elastic members in the third waist region are lower than those of the elastic members in the first and second waist regions. The said article characterized by being enlarged. 2. The article of claim 1, wherein each of the elastic members in the first and second waist regions is substantially equal to each other with respect to their cross-sectional area and elongational stress. 3. The thickness of the core in a front end region having a longitudinal dimension of at least 10 mm including a front end edge of the core,
3. Article according to claim 1 or 2, wherein the article tapers towards the leading edge.