JPH0515934U - Disposable diapers - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent exudate from seeping out and leaking from the inner sheet of the waist of disposable diapers. [Structure] A hydrophobic exudation preventing sheet 5 is overlaid and joined to the surface of an inner sheet around the waist of a diaper.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disposable diaper, and more particularly to a means for preventing exudate from seeping out from the inner surface of the waist circumference.

Conventionally, in a disposable diaper, in order to prevent the excretory liquid from seeping out from the inner sheet in the waist circumference and leaking to the outside or wetting the underwear of the wearer, a hydrophobic sheet is used in the waist circumference. It is known that the inner sheet is joined to the surface.

[0003]

[Problems to be solved by the device]

 However, since the exudation-preventing sheet in the known diaper is entirely bonded to the surface sheet, the bonding area becomes rigid even though the surface sheet is made of a flexible fibrous nonwoven fabric. .. Moreover, the excretion liquid may run over the surface from the inner edge of the exudation preventive sheet, but if this is done, the excess excretion liquid will not be reabsorbed inside the diaper and will therefore leak to the outside. Alternatively, the underwear of the wearer may be wet, and the effect of providing the exudation prevention sheet will be halved.

The present invention aims to solve the above problem by how to bond the exudation prevention sheet to a surface sheet, and in particular, how to relate it to the waist circumference. To do.

[0005]

[Means to be solved by the device]

 The present invention for solving the above-mentioned problems is to provide an absorbent panel between a liquid-permeable inner surface sheet and a liquid-impermeable outer surface sheet, and to extend laterally on the surface of the inner surface sheet in the waist area. Disposable diaper with bonded exudation prevention sheet.

In the structure according to the above premise, the present invention joins the exudation-preventing sheet with the inner sheet by a seal line extending in the length direction between the inner edge and the outer edge of the exudation-preventing sheet. It is characterized by being done.

In this preferred embodiment, an elastic member that expands and contracts in the surrounding direction is attached to the waist area.

[0008]

[Action]

 In the diaper according to the present invention having the above-mentioned configuration, when the excreted liquid absorbed inside the diaper exudes to the top sheet or diffuses in the top sheet to reach the waist circumference, the exudates the surface thereof. It does not seep out because it is covered with a protective sheet. Moreover, since the inner edge of the exudation preventive sheet is not joined to the surface of the topsheet, excretion liquid does not penetrate from the inner edge of the exudation preventive sheet to the surface of the exudation preventive sheet and penetrates between the surface sheet and the exudation preventive sheet. Is absorbed from the top sheet again into the diaper. In particular, when an elastic member is attached to the waist, the contraction force of the elastic member causes some wrinkles on the inner side of the exudation preventing sheet to form a plurality of openings with the top sheet. Infiltration is accelerated. The diffusion of the excretion liquid that has infiltrated between the topsheet and the exudation prevention sheet to the outer edge side of the waist circumference is prevented by the seal line joining the sheets.

[0009]

【Example】

 The diaper according to the present invention will be described in more detail with reference to the illustrated embodiment.

1 and 2 show an assembled perspective view and an exploded inner perspective view of an example of a diaper to which the present invention is applied. The diaper 1 includes first and second cuffs 2 and 3 extending in the lengthwise direction, which are made of a material different from the diaper body, on both sides of the inner surface of the diaper 1, and the front waist of the diaper 1 and the second cuffs 2. Tape fasteners 4 for connecting to the enclosure are attached respectively. Further, exudation prevention sheets 5 intended by the present invention are attached to the inner surfaces of the waist circumferences on the front and rear sides of the diaper 1, respectively. Elastic members (not shown) that expand and contract in the respective length directions are attached inside the free edges of the first and second cuffs 2 and 3 and inside the waist surroundings on the front and rear sides.

FIG. 3 is a plan view of the inside of a front waist portion of the diaper 1 in the vicinity of the waist, and FIG. 4 is a sectional view taken along the line AA of FIG. The back waist circumference is the same as the front waist circumference, so it is omitted in the following description, but the exudation prevention sheet 5 is joined to at least the back waist circumference on the front and rear sides. It is necessary. The structure of the main body of the diaper 1 is basically the same as the known one, and an absorbent panel 8 is interposed between the liquid-permeable inner sheet 6 and the liquid-impermeable outer sheet 7, and Is a non-woven fabric, the outer sheet 7 is a plastic sheet, and the panel 8 is a mixture of ground pulp and superabsorbent polymer powder. Although not shown, the panel 8 is generally covered with tissue paper at least on its upper and lower surfaces.

Inner and outer sheets 6 and 7 extend from the outer peripheral edge of the panel 8 to form flaps, and FIG. 4 shows the flap 9 extending from one longitudinal edge of the panel 8. A band-shaped elastic member 12 that expands and contracts in the waist-surrounding direction is attached between the flaps 9 via a hot melt adhesive 13.

The exudation prevention sheet 5 is made of a hydrophobic fibrous non-woven fabric or a plastic sheet and extends between both sides of the waist circumference of the diaper 1 and from the outer edge of the flap 9 to one end of the panel 8. It is formed in a strip shape having a size extending to and is joined to the surface of the inner sheet 6 in such a region. The length dimension of the exudation preventing sheet 5 needs to be at least smaller than the width dimension of the core 8, and it goes without saying that depending on the type of the diaper 1, it may extend over the entire length of the waist circumference. Nor.

The exudation preventing sheet 5 is joined to the surface of the inner surface sheet 6 by a plurality of seal lines 10 extending in a wavy shape in the lengthwise direction approximately at the center between the inner edge 5a and the outer edge 5b of the exudation preventing sheet 5. It's done. The seal line 10 is made of hot melt adhesive or welding (heat or ultrasonic waves), but as shown in FIG. 5A, the inner edge 5a of the exudation preventing sheet is left and the peripheral edge thereof is surrounded by a continuous line. Alternatively, as shown in FIG. 5B, it is preferable to leave the inner edge 5a of the exudation-preventing sheet and to surround the peripheral edge with an intermittent (dot) line. In the joining by the hot melt adhesive, the adhesive is impregnated between the fibers of the seal line 10 to integrate the material of the exudation preventing sheet 5 and the inner surface sheet 6, and even in the joining by the welding, the exudation preventing The materials of the sheet 5 and the inner sheet 6 are welded and integrated. Therefore, the seal line 10 functions as a barrier against the permeation and diffusion of excreted liquid.

The present invention having the above-mentioned constitution should not be evaluated as simply bonding the exudation preventing sheet 5 to the surface of the inner sheet 6. This invention is designed so that the inner edge 5a and most of the outer edge 5b of the exudation-preventing sheet 5 are not joined, that is, the inner edge 5a and the surface of the inner sheet 6 are not joined to each other, so that the diaper is surrounded by the waist area from the central area. The excretion liquid flowing and diffusing into the vicinity of the inner wall 5a is allowed to infiltrate between the inner edge 5a and the surface of the exudation preventive sheet 5, and particularly when the elastic member 12 is contracted, Since wrinkles are generated in the vicinity including the inner edge 5a, the inner edge 5a rises in a wave shape from the surface of the inner surface sheet 6 and forms a plurality of openings between the inner edge 5a and the surface to further promote the above function. Because. The excreted liquid that has entered between the exudation prevention sheet 5 and the inner surface sheet 6 is not blocked by the seal line 10 and does not permeate and spread to the side of the outer edge 5b.

[0016]

[Effect of the device]

 According to the diaper according to this invention, as described above, the exudation prevention sheet is given a unique function to effectively prevent the exudate from exuding near the waist of the diaper and leaking from the vicinity to the outside. be able to. Moreover, even though the exudation preventing sheet is superposed and joined to the inner sheet, the superposed region does not become uncomfortable due to the rigidity of the superposed region.

[Brief description of drawings]

FIG. 1 is an assembled perspective view of a disposable diaper to which the present invention is applied.

FIG. 2 is a perspective view of the inside of the diaper shown in FIG.

FIG. 3 is a plan view of the waist area around the front side of the diaper of FIG. 2;

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 5A and FIG. 5B are plan views showing respective aspects of the seal line with respect to the inner surface sheet of the exudation preventing sheet.

[Explanation of symbols]

 5 Exudation prevention sheet 5a Inner edge 5b Outer edge 10 Seal line

Claims (2)

[Scope of utility model registration request] 1. An absorbent panel is interposed between a liquid-permeable inner sheet and a liquid-impermeable outer sheet, and a hydrophobic exudation-preventing sheet extending in the lateral direction is joined to the surface of the inner sheet in the waist area. In the disposable diaper, between the inner edge and the outer edge of the exudation prevention sheet,
The diaper, wherein the exudation prevention sheet is joined to the inner sheet by a seal line extending in the lengthwise direction. 2. The diaper according to claim 1, wherein an elastic member that expands and contracts in the surrounding direction is attached to the waist area.