JPS6336002Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a disposable diaper to be worn by infants, the elderly, sick people, etc. who are unable to dispose of their own excrement, and in particular to an improvement in its elastic member.

Conventionally, various types of disposable diapers that do not require a diaper cover have been proposed and put into practical use.
In general, these known diapers consist of at least a water-permeable top sheet that comes into contact with the skin when worn, an impermeable back sheet that does not come into contact with the skin, an absorbent body interposed between the two sheets, and a longitudinal axis on both sides of the absorbent body. and a water-impermeable elastic member attached to be able to expand and contract in the direction.

However, in these publicly known diapers that are generally in practical use, ordinary rubber is used as the elastic member, so the wearer's leg area is compressed locally in a linear manner, and the leg area is compressed tightly. Pressure marks around the circumference are inevitable, and wearing such diapers for a relatively long period of time can cause pain to the wearer.

On the other hand, in order to eliminate such drawbacks, it has been proposed to use a relatively wide elastic member, but this elastic member is also made of ordinary rubber. Even if it is possible to prevent the wearer's leg circumference from being compressed locally by making the elastic member relatively wide, since it is made of ordinary rubber, its thickness may be limited. Since it needs to be formed very thin and its soft elasticity in the thickness direction is poor, it cannot be said to be suitable for bringing the both sides of the diaper into soft pressure contact with the leg area.
Moreover, it only has the function of pressing both sides of the diaper against the leg area. Therefore, even though this telescoping member is made relatively wide, it is
To keep the pressure on the leg area to the minimum necessary level so as not to cause pain to the wearer by applying tight local pressure to the leg area in a linear manner, and to increase the area of pressure contact with the leg area and absorb excretory fluid. According to
This invention does not intend or teach an effect of effectively preventing such leakage.

The main purpose of this invention is to attach a relatively wide tape-shaped water-absorbent elastic member with excellent soft elasticity in the thickness direction, which allows the side edges of the diaper to be softly pressed against the legs and has a relatively wide pressure area. To provide a disposable diaper which can be made to fit tightly together and which can effectively prevent leakage of excrement fluid from around the legs by imparting absorbency to both sides of the diaper.

The configuration of the present invention for achieving the above-mentioned object will be described below based on the illustrated embodiments.

1 and 2, the diaper 1 has a front side part 2, a back side part 3, a crotch area 4, and waist circumferences 5, 6.
The diaper 1 is attached to the wearer's body by bonding tapes 7 attached to both ends of the waist surround 6 to both ends of the waist surround 5. Furthermore, the diaper 1 includes a water permeable top sheet 8 that comes into contact with the skin when worn, an impermeable back sheet 9 that does not come into contact with the skin, an absorbent body 10 interposed between the two sheets, both side flaps 11, and the both sides. It is provided with a water-absorbing elastic member 12 for expanding and contracting the surface flap in the longitudinal direction.

As shown in FIGS. 1 and 2, the top sheet 8 and the back sheet 9 have the same shape and are formed larger than the absorbent body 10, and have notches 1 on both sides.
3, and their outer peripheral edges are joined by adhesive, welding, or other means to completely cover the absorbent body 10. As the material for the top sheet 8, a water-permeable sheet commonly used in disposable diapers is used, but preferably a nonwoven fabric without a fiber binder is used, and particularly preferably a nonwoven fabric made by the present applicant in Japanese Patent Application Laid-Open No. No. 71853, No. 55-68367, No. 57
A nonwoven fabric produced by the high-speed liquid jet treatment method already proposed in No. 39268 is used. This nonwoven fabric is obtained by jetting a high-speed liquid onto a fiber web to entangle the fibers, and since it does not contain a fiber binder and is flexible and bulky, it is suitable for the soft and sensitive skin of infants. It is suitable for contacting. As a material for the back sheet 9, a thin flexible plastic film such as polyethylene, which has been commonly used in the past, is used.

As shown in FIG. 3, an absorbent body 10 is formed by covering a defibrated pulp layer 14 with a hydrophobic net-like sheet 15, and the hydrophobic net-like sheets 15 are located on the upper and lower surfaces of the absorbent body. glue,
It is joined to the inner surfaces of the top sheet 8 and the back sheet 9 by means such as welding, so that it is located between the two sheets and does not move in any direction. Tissue paper may be interposed between the upper surface and/or lower surface of the absorbent body 10 and the hydrophobic net-like sheet 15 located on that surface in order to improve the water absorption and diffusion properties of the defibrated pulp layer 14. be.

In FIGS. 1 and 3, an example is shown in which the absorbent body 10 is formed into a rectangular shape, but it may also be formed into a so-called hourglass shape that becomes narrower in the crotch area 4. The present invention is not limited to the illustrated example.

The hydrophobic net-like sheet 15 is made by adding a foaming agent to a hydrophobic resin such as polypropylene, polyethylene, vinyl chloride, etc. alone or in a mixture, and
It is obtained by melting and extruding these in an extrusion molding machine and simultaneously foaming and molding, and is known under the trade name "Noinet" and can be obtained from Mitsui Toatsu Co., Ltd. This sheet 15 has each fiber 16 as shown in FIG.
It has the shape of a continuous filament, which is partially connected to form countless eyes 17, is thin and lightweight, and has elasticity in the direction crossing the lines of each filament 16, that is, in the width direction. . This sheet 15
covers the absorbent body 10.
acts to press down on the surface of the absorbent body 10 when subjected to bending or tensile stress while handling or wearing the diaper 1, effectively preventing the absorbent body 10 from losing its shape, and furthermore, absorbing into the absorbent body 10. This function effectively prevents the excreted liquid from seeping into the top sheet 8. Although it is preferable that this sheet 15 covers the entire absorbent body 10, it may simply cover the upper and lower surfaces of the absorbent body 10, and may also be located inside the absorbent body 10. It is more preferable to be present.

As shown in FIGS. 1 and 3, the side flaps 11 are formed by a top sheet 8 and a back sheet 9 extending outward from both side edges of the absorbent body 10. These both side flaps 11 may not be formed depending on the type of diaper, and even if they are formed, they are simply the top sheet 8 and back sheet 9.
Sometimes it is formed narrow enough to join both side edges of the. Therefore, in the present invention, it is not necessarily a condition that both side flaps 11 are formed.

As shown in FIGS. 1 and 5, the elastic member 12 is formed into a tape shape, and when it is in contact with both side edges of the absorbent body 10 and is stretched in the longitudinal direction, it extends in a line along both sides of the lower surface. It is adhered to the inner surface of the back sheet 9 by an applied adhesive 18, and is also adhered to the inner surface of the top sheet 8 by an adhesive 19 applied in a line at the center of the upper surface. In the illustrated example, the elastic members 12 are in contact with both side edges of the absorbent body 10, but they may be attached so as to overlap the side edges of the absorbent body 10, or they may be attached to overlap the side edges of the absorbent body 10.
They may be attached at appropriate intervals outward from the side edge of 0. The material of the elastic member 12 is as follows:
In addition to flexible and water-absorbing materials used for bandages, etc., preferably flexible spongy materials, and more preferably spongy materials in which water-absorbing fibers are implanted. As the material, foamable urethane is suitable.
The present applicant has already proposed a fiber-embedded foam sheet in JP-A-56-11243, which is
As shown in the figure, a group of water-absorbing fibers 21 are intertwined with each other and implanted in a foamable urethane 20 by a high-speed liquid jetting process, which has excellent water absorption retention properties and is suitable for the elastic member 12. It is. The width of the extensible member 12 is 10 to 60 mm, preferably 15 to 45 mm. If the width is less than 10 mm, the desired effect will not be sufficiently exhibited, and if the width is more than 60 mm, it will be uneconomical. Further, the desired effect can be sufficiently exhibited if the thickness is about 0.5 to 3 mm, but it is not particularly limited to this.

When the elastic member 12 is stretched in the longitudinal direction as described above, both edges of the lower surface and the center of the upper surface are attached to the back sheet by linearly applied adhesives 18 and 19, as shown in FIG. 9 and surface sheet 8
Since the elastic member 12 is bonded to each inner surface of the elastic member 12, when the elastic member 12 is in a contracted state, it curves upward and expands in the thickness direction, increasing soft elasticity, that is, cushioning properties, as shown in FIG.

According to the diaper according to the present invention, since the relatively wide tape-shaped water-absorbing elastic member 12 having soft elasticity in the thickness direction is attached as described above, this elastic member 12 is attached to both sides of the diaper 1. can be brought into close contact with the wearer's leg area in a soft manner and with a relatively wide pressure contact area. Furthermore, since the elastic member 12 has water absorption properties, it absorbs the excretory liquid that has reached both sides of the diaper 1. Therefore, leakage of excretory fluid from the leg area can be prevented and the intended purpose can be achieved.

Although the elastic member 12 has a relatively wide width of 10 to 60 mm, the both edges of the lower surface and the center of the upper surface of the member are bonded with a linear adhesive, so the adhesive does not make it rigid. Not only that, but you can save on adhesive.

Further, since the elastic member 12 is bonded in this manner, in the contracted state, it curves upward and expands, thereby increasing cushioning properties and relieving the feeling of pressure around the legs. Moreover, the curved, bulging, and flattened states are repeated due to body movements and body pressure. Therefore, the elastic member 12
When steam enters the inside of its curved and bulging shape, it is forced to flow in the longitudinal direction of the diaper, that is, in the direction of the waist circumference of the diaper, and is discharged from the waist circumference to the outside. As a result, there is less stuffiness inside the diaper.

As described above, the diaper according to the present invention provides effects that cannot be expected from conventional diapers.
It is extremely useful for practical use.

[Brief explanation of the drawing]

The drawings show one embodiment of the diaper according to the present invention. Figure 1 is a developed plan view seen from the top sheet side. FIG. 2 is a perspective view of the worn state. FIG. 3 is an enlarged sectional view taken along line XX in FIG. 1. FIG. 4 is an enlarged plan view of the net-like sheet. FIG. 5 is a partially enlarged perspective view of the telescopic member in an attached state. FIG. 6 is an enlarged sectional view of an example of the material of the expandable member. FIG. 7 is an enlarged sectional view of the expandable member in a contracted state. DESCRIPTION OF SYMBOLS 1... Diaper, 8... Top sheet, 9... Back sheet, 10... Absorber, 11... Side flap, 12... Elastic member, 15... Net-like sheet, 18, 19... Adhesive.

Claims (1)

[Claims for Utility Model Registration] (1) A water-permeable top sheet, a water-impermeable back sheet, an absorbent body interposed between the two sheets, and both sheets extending outward from both side edges of the absorbent body. A disposable diaper comprising an elastic member attached to be elastically extended in the longitudinal direction in a side flap to be formed, wherein the elastic member has a width of 10 to 60 mm.
It is made of a foamed material that has water absorption and air permeability of 1.5 mm and is flexible and elastic, and is attached to the inner surface of the back sheet by an adhesive applied in a longitudinal direction on both sides of the lower surface of the member. The diaper is bonded to the inner surface of the topsheet by an adhesive applied in a linear manner in the longitudinal direction at the center of the top surface. (2) The disposable diaper according to claim 1, wherein the elastic member is made of urethane.