JP2544909Y2 - 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 having an air-permeable slit in a liquid-impermeable backing sheet.

[0002]

2. Description of the Related Art Conventionally, as one of the techniques for relieving stuffiness when a disposable diaper is worn, there is a technique of providing air-permeable through holes in a back sheet or a wing piece joined thereto. For example, in Japanese Utility Model Laid-Open Publication No. 3-111324, each wing piece extending from the opposite side of the back side area of the diaper is formed of a sheet having a large number of through holes, and the ventilation of the diaper is improved through these through holes. I'm sorry.

[0003]

[Problem to be Solved by the Invention]
In the technique disclosed in Japanese Patent No. 324, a wing piece provided with a through-hole is made of a plastic film or a nonwoven fabric, and this is joined to a back area of the diaper by welding or the like. Although this technique does not disclose anything about the method of providing a through hole, in order to provide a large number of fine through holes in a material such as a plastic film or a nonwoven fabric, it is possible to employ a method of mechanical punching or a method of thermally melting the material. Many. However, punching has a problem in that it is difficult to clean the material cleanly, so that the periphery of the through-hole is crushed, which is not preferable in appearance. In the case of heat melting, there is a problem that the melted and solidified material remains around the through-hole, which stimulates the wearer's skin.

[0004] In view of the above, an object of the present invention is to improve the breathability of a diaper while solving the above-mentioned problems by providing a slit in at least the back sheet around the waist of the flap.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the gist of the present invention is to provide a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber interposed between these two sheets. Comprising a disposable diaper in which at least the back sheet extends outward from each side edge of the absorber to form a flap, in such a diaper,
At least a waist portion of the flap of the back sheet is provided with a number of slits along the length of the diaper,
In a state where no tension is applied in a direction perpendicular to the longitudinal direction, the slits are closed.

[0006]

In the disposable diaper configured as described above, when the waist around the flap is pulled in the waist direction in order to fit the diaper to the wearer, the slit is also pulled in the lateral direction to open the hole. The opened slit acts as a ventilation hole, and can prevent the diaper from becoming stuffy. The slit can clean the cut by using a slitter with a sharp edge, and such a cut does not irritate the wearer's skin.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of this invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a disposable diaper 1 according to the present invention.
Is a plan view as viewed from the back side, and a part is cut away. The diaper 1 includes a gas-permeable liquid-permeable topsheet 2, a liquid-impermeable backsheet 3, an absorber 4 interposed between these two sheets 2, 3, and the like. The top sheet 2 and the back sheet 3 are extended, and the extended sheets 2 and 3 are intermittently joined to each other to form a flap 5. The longitudinal direction of the diaper 1 includes a front body 6, a crotch part 7, and a back body 8, and the front and rear bodies 6, 8 have edges 12,13. Flap 5
8, a waist flap 5 whose extension is relatively large
A and 5B, and a leg flap 5C having a relatively small extension at the crotch region 7. At both side edges of the waist-around flap 5B of the back body 8, one end of a tape fastener 9 for connecting the front and rear bodies 6, 8 when the diaper 1 is worn is fixed to the back sheet 3. Between the front and back sheets 2 and 3, these two sheets 2 and 3
In the vicinity of the leg elastic members 10 adhered to the front and back, and near the edges 12, 13 of the front and rear bodies 6, 8, both sheets 2,
A waist elastic member 11 attached between the three is provided. In the waist-around flaps 5A and 5B, the back sheet 3 is provided with a number of slits 15 along the longitudinal direction of the diaper 1, and the slit 15 is in a closed state when no tension acts in a direction perpendicular to the longitudinal direction. .

FIG. 2 is a perspective view of the diaper 1 in a worn state. The diaper 1 overlaps the waist flaps 5A and 5B on the left and right sides, and then sticks the free end of the tape fastener 9 to the back sheet 3 of the front body 6 while gently pulling the free end in the waist direction. 8 are connected. In the diaper 1 worn in this manner, the waist-direction tension acts on the waist portion of the back sheet 3, and the slit 15 provided on the waist flaps 5 </ b> A and 5 </ b> B is pulled in the lateral direction together with the top sheet 2 by the tension. The diaper 1 is opened through the diaper 1 through the air-permeable topsheet 2.

In the diaper 1, the topsheet 2 is made of nonwoven fabric or an apertured plastic film having a large number of openings of an appropriate size, the backsheet 3 is made of a plastic film, and the absorber 4 is made of pulverized pulp or pulverized pulp. Mixtures with water-absorbing polymers can be used. The flap 5 may be the back sheet 3 alone, but if the top sheet 2 is permeable, it can be extended from the side edge and integrally joined with the back sheet 3. In addition, the back sheet 3 can be reinforced and the feel of the top sheet can be improved.

The slit 15 is selected at a site where the diaper 1 is to be provided so as not to cause the diaper 1 to leak. The waist-around flaps 5A and 5B are the most suitable portions, and the back sheet 3 near the edges 12, 13 is also a preferable portion.

The slit 15 can be provided in the plastic film for the back sheet 3 flowing through this step by a slitter incorporated in the continuous production process of the diaper 1. If a sharp slitter is used, the cut is clean and the wearer can wear it. A slit that does not irritate the skin is easily obtained.

[0013]

[Effect of the Invention] The vent of the disposable diaper according to the invention is a slit, so that the appearance of the cut can be made clean and the cut does not irritate the wearer's skin. The slit can be easily obtained by a slitter.

[Brief description of the drawings]

FIG. 1 is a plan view of a diaper according to the present invention.

FIG. 2 is a perspective view of the diaper in a worn state.

[Description of Signs] 1 Diaper 2 Top sheet 3 Back sheet 4 Absorber 5 Flap 5A, 5B Waist circumference flap 5C Leg circumference flap 15 Slit

Claims (1)

(57) [Scope of request for utility model registration] 1. A liquid-permeable topsheet, a liquid-impervious backsheet, and an absorber interposed between these two sheets, at least the backsheet being outwardly from each side edge of the absorber. In the disposable diaper that extends to form a flap, at least a waist portion of the flap of the back sheet is provided with a number of slits along a longitudinal direction of the diaper, and tension in a direction orthogonal to the direction does not act. The disposable diaper, wherein the slit is in a closed state in a state.