JPS5966501A - Disposable diaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in disposable diapers for treating excreta.

Conventionally, so-called pants-type disposable diapers that do not require a diaper cover have been put into practical use. Such a diaper has stretchable elastic members on both sides of its absorbent core, so it has good adhesion to the wearer's swelling and bending.
This is effective in preventing the leakage of excrement from the bulge.

However, the stretchable elastic member does not function to bring the center part of the diaper into elastic contact with the wearer's crotch, so that it is difficult for the center part of the diaper to fit tightly against the wearer's crotch when worn. Therefore, when the wearer is sleeping on his or her back, urine flows along the wearer's skin to the buttocks.

When it flows like this, urine is absorbed only in the part from the crotch of the baby to the back, and the part going to the front is not effectively used for suction, so a relatively small amount of urine is produced. However, it has the disadvantage that it irritates the wearer's back or causes discomfort due to leakage from the back.

Akira Honhi's 1" target is that when wearing a diaper, the central part located under the user's crotch elastically conforms to the crotch.
1- It is an object of the present invention to provide a disposable diaper which can eliminate the above-mentioned drawbacks by being configured as follows.

The gist of the present invention to achieve the objects stated above is at least a water-permeable top sheet, a water-impermeable back sheet, an absorbent core integrally interposed between the curves of both sheets, and a water-permeable top sheet; A disposable diaper comprising a first stretchable elastic part extending and contracting freely in the longitudinal direction near each opposing side g1 of the core, wherein the first stretchable elastic part is located between the two first stretchable elastic parts. and an arbitrary number of second stretchable elastic members are attached between the backsheet and the core so as to be freely stretchable in the longitudinal direction.

Further, the present invention will be explained based on the illustrated embodiments as follows.

In FIGS. 1 to 3, a diaper 1-1 front area 2,
A tape fastener 7 provided at each opposite side end of the waist part 5 of the back side area 3 is connected to each opposite side end of the waist part 6 of the front side area 2. K], the diaper 1 is assembled and each waist part 5 and 6 are fastened.

Furthermore, the diaper 1 is made up of a water-permeable top sheet 8, an impermeable bank sheet 9, and both sheets)8. The absorbent core 1o that is integrally interposed in llJ, and the outside from each opposing side end of the core 1o ((longitudinal length in each of the side flaps 11 formed by both sheets 8 and 9 extending to and joining 11) It consists of a first stretchable elastic member 12 attached to be extendable in the direction.The diaper 1 having such a structure is
J (<excluding the structure of the synthetic core 10, which is generally known in the past.

The side edges of the top sheet 8 and the back sheet 9Vi are cut off so that a concave notch 13 is formed at each opposing side edge in the central portion. The topsheet 8 is generally made from a non-woven fabric, preferably a non-woven fabric without fiber binders.

The backsheet 9 is generally made from plastic film. The core 10 is made of Furanofu Palf 0 as a main material, is formed smaller than the contours of the top sheet 8 and the back sheet 9, is interposed between the top sheet 8 and the back sheets 1 and 9, and is bonded with an adhesive. It is fixed in place. core 10
The parts of the top sheets 1 and 8 and the back sheet 9 that protrude outward from the outer peripheral edge of the top sheets 1 and 8 and the back sheet 9 are joined to each other with a beaching agent, and by this joining, the parts of the top sheets 1 and 8 and the back sheet 9 that protrude outward from the outer peripheral edge of the The first stretchable elastic member 12 is glued to Ii! 5
It's been cured.

A second elastic member 14 is provided between the elastic members 12 of both cylinders 1 and between the back sheet 9 and the core 10.
is attached in a state where it is stretched in the longitudinal direction. The second elastic member 14 is attached to the bank sheet 9 and/or the core 10 using an adhesive.

In the illustrated example, one first elastic member 12 is attached to each side end of the core 10, while the second elastic member 12 is attached to each side end of the core 10.
4, three pieces are taken at regular intervals,
The number and interval of these can be arbitrary, and one, two, or several dozen can be taken at appropriate intervals. In particular, in the case of the second telescopic bullet 11: member 14, if it is 1/I, it is preferable that it be placed in the center of the male Mutsu 1, but it is possible to ask if there are multiple pieces. In some cases, the spacing need not be constant; for example, it may become narrower in stages toward the center of the diaper 1, and in some cases it may not be in a ski row. I don't mind. Furthermore, there is no need for a space between each of the cores, and a plurality of the cores may be in contact with each other. ψ, the number and spacing of the rods should be determined by considering the material, thickness or width of the rod, □ cross-sectional shape, elasticity □ force, and rigidity of the back sheet 9 and core 10, etc. The area is appropriately selected to be most preferable for closely fitting the wearer's crotch. The length of the second stretchable elastic member 14 acting on the diaper 1 is similarly selected appropriately, but in the present invention, at least the part located under the crotch of the diaper 1 when worn is Stretched in the longitudinal direction t・i
It is necessary to be able to do 4se□
It is.

Said 1st and 2nd Nakahani 1 [Sex Buraku 12.14 Toga may be made of natural comb, synthetic rubber, urethane foam, etc., or any combination thereof, and its cross-sectional shape may also be 1
〉, either square or round, or its shape,
It may be referred to by any name such as tape, thread, string, etc. In addition, each year 1, the second elastic member 12
．． If there are a plurality of 14, a tape-like material with a relatively wide IM made of urethane foam and a plurality of thread-like material made of rubber may be used in combination. .

According to the present invention, although the structure of the core 10 is not fixed, the first objective of the present invention can be more effectively achieved.
For j7:I, it is preferable to have a configuration as in the embodiment. The configuration of A 10 of the actual hhm is illustrated in most detail in FIGS. 3 to 7. That is, the core 10 is composed of a first core part 15 and a '@2 core member 16.

The lower surface of the first yarn thread material 15*' and the opposite side edges of the fluff pulp layer 17 are covered with a hydrophobic net-like sheet 18, and the upper surface thereof is covered with tissue paper 1.
9, diagonal slits 20 are made on both sides, and the outer trapezoidal portions 2'1 formed by twisting are folded inwardly toward each other. Therefore, in the first core member 15, the width I of the folded portion 22 located in the crotch area 4 of the diaper 1 is the narrowest. The second core part 16 is formed wider than the width of the folded part 2 of the first core part 15 and narrower than the non-folded part of the first core part 15, and is formed in the fluff pulp layer 23. The top surface and each opposing side edge are covered with a hydrophobic sheet 24, and as shown in FIGS.
Core member j1.5. On the top of: Huh, uh, tsu? Valve layer 2
The core 10 thus configured has a diaper 1., l = inseam area 4.
The area has a width of 1 S and is thicker than other areas. .

Said 31'aqueous net'1'-1"°・"0.・For 7 and 0, a blowing agent is added to a hydrophobic auxiliary such as polypropylene, polyvinyl chloride, vinyl monochloride, etc. alone or in a mixture, and this is extruded, melted and extruded in a molding machine, and then expanded and packaged into the same II+. It is obtained by molding,
It can be obtained under the trade name ``Noine Soto''. ,
Kome sheet 18. 24 consists of countless filaments, which form a continuous filament shape and are partially in contact with each other, and have long gaps in their longitudinal direction. has holes, is thin and lightweight, and has elasticity in the width direction. Therefore, sheet 1. I3; 1st core portion covered by 24 *A' 15, 2nd: J
When the diaper 1 is subjected to bending or tensile stress during handling or wearing, the inner cavity 16 acts to press down the surface of these core members, and the fluff pulp layer 17 in these core members. Effectively prevents '23 from losing its shape by 5.9,
And the pressure cracks absorbed in these layers'-7□N'Q□
Hega□o,. It fulfills the function of luj JJ.

□ According to the present invention having the above-mentioned configuration, the force of each opposing side end of the diaper 1 is elastically fitted and tightly fitted to the head of the wearer's legs by the action of the first elastic member 1217). The leakage of urine from the chest area is caused by the action of the leakage member 14 in the central part of the chest area.

Since the diaper fits elastically and tightly against the wearer's crotch, urine is absorbed in the center of the diaper 1 and diffused to the periphery of the diaper 1, thereby eliminating the conventional drawbacks mentioned above. and ε Atsumi imaginary ILIS 6sξ, 1 absorbent core 10
In the crotch area A (diaper '1, which is narrower and thicker than other areas), the shape of the core 10 and the action of the stretchable elastic rtls material J2.1.4 combine to ensure the conforming fit. The properties of the disposable diapers are now even better, and the disadvantages that disposable diapers generally have, i.e., 1;
Compared to cloth diapers and flexible diaper covers, disposable diapers have the disadvantages of being difficult to form a good seal on the body due to their porcelain nature, and also being prone to slipping when worn. It can be erased and is no inferior to conventional covers and diapers.

[Brief explanation of the drawing]

Fig. 1 is a developed plan view of a diaper according to the present invention with a portion of the top sheet cut out by 9J, Fig. 2 is a perspective view of the assembled diaper, and Fig. 3 is a diagram of Fig. 1-1. 1i1 design; omitted hII diagram, 4th V is a plan view of the core member, 51st is a plan view of the second core member,
Figures 6 and 7 are Xl-■ in Figure 4 and ■- in Figure 5.
V] They are respective inflection 1τi+ plane views on the l line. Construction: Diaper 2: Front area 3: Back area 4: Inseam area: 8 (Top sheet), 9-7 Back seat: 10: Core
]2...First axially elastic member 14...Second elastic member

Claims (1)

[Claims] (1) At least a water-permeable top sheet, a water-impermeable back sheet, an absorbent core interposed integrally between the two sheets, and each opposing side of the core. A disposable diaper comprising a first elastic member elastically attached in the longitudinal direction near the end, wherein both the first elastic members have the backsheet and the core: The diaper as described above, wherein an arbitrary number of second stretchable elastic members are attached between the ends of the diaper so as to be stretchable in the longitudinal direction. (2) The disposable diaper according to claim 1, wherein the second stretchable elastic member is fixed to the back sheet and/or the core in a stretched state. -(3) The core is such that both sides of the crotch area are folded inward in an M shape, thereby forming the crotch/TIK area to be narrower and thicker than other areas. The disposable diaper according to item 1. (4) A patent claim in which the first and/or second stretchable elastic member is a combination of a tape-shaped member made of urethane foam material and a thread-shaped member made of rubber. Range of □Disposable diapers described in item 1.