JP2526762Y2 - Disposable diapers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper. More specifically, the present invention relates to a disposable diaper having good crotch fit.

[0002]

2. Description of the Related Art In a conventional disposable diaper, a plurality of elastic elastic members provided at a portion in contact with a crotch portion are generally arranged in parallel in a longitudinal direction. This is because the fit is good at the crotch when wearing, but the front and back of the crotch is not sufficiently fit, and when the child is lying on his back or face down, the front of the crotch or It causes urine and stool leakage from the rear side.

Conventionally, various proposals have been made to deform the crotch gathers in order to improve the fit of the crotch, the front side of the crotch, and the rear side of the crotch. For example,
A method of improving the fit by installing a crotch elastic body parallel to the side edge of the diaper
No. 7306) or a method of installing a crotch elastic body in a curved shape (Japanese Patent Laid-Open No. 62-207607) has been proposed, but is not yet complete.

[0004]

[Problems to be Solved by the Invention] At present, disposable diapers are not perfect in fitting property of a crotch and followability to movement, and incomplete prevention of leakage from the crotch.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, the elastic elastic bodies of the crotch gather portion are crossed at one point with each other, and the crossing angle is defined. It has been found that the above problem can be solved by this. That is, in a disposable diaper including a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets, the crotch elasticity provided on both longitudinal side edges of the absorber, respectively. The part is composed of a first elastic elastic body and a second elastic elastic body that intersect each other at one point.
Becomes, and found to be able to solve the above problems by the crossing angle is in the range of 5 degrees to 30 degrees.

Hereinafter, the present invention will be described in detail. The materials used in the present invention are all commonly used materials. Usually, as the top sheet, a hydrophilic nonwoven fabric made of polypropylene, polyester, or the like, and as the back sheet, a waterproof film made of polyethylene, or
A gas permeable microporous film containing a fine particle pigment is used.

[0007] The absorber is composed of a single or a mixture of water-absorbing paper, fluff pulp, superabsorbent polymer and the like, and the stretchable elastic body is made of natural rubber thread rubber, elastic polyurethane rubber (spantex), polyurethane film and the like. Any of stretchable foam sheets such as stretchable films and urethane foams can be used. Also, a plurality of thin elastic bodies such as thread rubbers arranged in parallel may be used as the elastic elastic body.

Here, when viewed from the top sheet side of the diaper, and when the back side of the diaper is viewed upward and the abdomen side is viewed downward, the first stretchable elastic body extends from right to left, Conversely, the portion extending from left to right is referred to as a second elastic elastic body. Also, it may be the same kind of material or different materials. Then, they intersect each other at one point, and the intersection angle is appropriately 5 to 30 degrees. When the crossing angle is appropriate, the gathers are arranged along the diaper side edges, and the fit is improved. Further, when the gathers intersect, the crotch front and rear sides become double gathers, thereby preventing leakage of urine and stool. The first elastic elastic body and the second elastic elastic body are each composed of one or more elastic bodies. When a plurality of elastic bodies are used, the distance between the elastic bodies is suitably 2 to 15 mm. An appropriate width for attaching the elastic elastic body and the second elastic elastic body is 10 to 30 mm. When the width of the elastic body is 10 mm or less, the contact with the skin becomes strong, and the marks of gathers are easily formed. Conversely, when the width of the elastic elastic body is 30 mm or more, there is no adverse effect on the performance of the diaper itself, but it is not preferable because it leads to an increase in cost.

Further, as a method of attaching the elastic elastic body to both sides of the diaper in the longitudinal direction, a hot melt adhesive is intermittently applied to a predetermined position of a back sheet on both sides of the diaper in the longitudinal direction, and a guide is provided at a predetermined interval. The stretched elastic body guided to is bonded. As a method for applying the hot melt adhesive, there are methods such as solid coating, spray coating and spiral coating.

When the elastic elastic body is attached to both sides in the longitudinal direction of the diaper, it is desirable to attach the elastic elastic body in a state of being stretched to 30 to 200% in order to improve the fit to the crotch part.

Next, the present invention will be described with reference to the drawings.
FIG. 1 is a plan view of the disposable diaper of the present invention having a partially cut-away portion viewed from the top sheet side. Reference numeral 1 denotes a top sheet, 2 denotes an absorber, 3 denotes a back sheet, and 4 denotes a first elasticity on the right side. Elastic body, 5 is the second elastic elastic body on the right, 6 is the first elastic elastic body on the left, 7 is the second elastic elastic body on the left, 8 is the hot melt adhesive applied portion on the right, and 9 is the left 3 shows a hot melt adhesive applied portion. A hot-melt adhesive is applied to the position where the elastic elastic body corresponding to the diaper crotch part of the back sheet is installed (portions 8 and 9 in FIG. 1).

Next, the first elastic elastic body and the second elastic elastic body are provided on both side edges of the absorber at a distance from the back side of the diaper of the hot-melt-adhesive-applied portion in the longitudinal direction of the diaper.
The two elastic lines are attached so that the two lines intersect at a length of 3 and the angle at which the two lines intersect is 20 degrees. An absorber and a topsheet are put on it and adhered. Finally, cut between the mats to create individual diapers.

[0013]

[Effect of the invention] The first attached to both sides of the diaper in the longitudinal direction
And the second elastic body intersect each other at one point, and the intersection angle is attached in an angle range of 5 degrees to 30 degrees, so that the fit of the crotch portion is good and the crotch front side portion,
A disposable diaper capable of preventing leakage from the rear side can be provided.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a disposable diaper of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top sheet 2 Absorber 3 Back sheet 4 Right first elastic elastic body 5 Right second elastic elastic body 6 Left first elastic elastic body 7 Left second elastic elastic body 8 Right hot melt Adhesive application part 9 Hot melt adhesive application part on left side

Claims (1)

(57) [Scope of request for utility model registration] 1. A disposable diaper comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between the two sheets, provided on both longitudinal edges of the absorber. Crotch elastic parts, one point each other
In the first stretchable elastic member and the second stretchable elastic member or <br/> Rannahli intersect, and, disposable diaper, characterized in that the crossing angle is 30 degrees 5 degrees.