JP3323053B2 - Pants-type disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disposable diaper which can be rolled up and discarded after use.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 5-51327 discloses a stretchable annular body in a pants-type disposable diaper after use, in which a waist opening edge having an elastic member is torn in a circumferential direction. Describes that diapers after use are rolled and discarded. Discarding the diaper in this manner is preferable from the viewpoint of hygiene, since a portion contaminated with excrement is not exposed.

In Japanese Utility Model Laid-Open No. 5-39531, it is described that an adhesive tape is prepared on the outer surface of a back sheet of a diaper, and the diaper is rolled using the tape.

[0004]

The use of an adhesive tape to roll a diaper after use has the advantage of being simple, but on the other hand, if the adhesive surface of the tape becomes dirty, it loses its adhesiveness. The disadvantage is that it is useless. As disclosed in Japanese Utility Model Laid-Open No. 5-51327, there is no such a defect in a method of forming a ring from a diaper after use and rolling the diaper with this, but when removing a dirty pants-type diaper, If the left and right sides of the diaper are cut open, there is a problem that the means cannot be used. If the stool is excreted when wearing a pants-type diaper, the left and right sides of the diaper may be cut open, and the diaper may be removed so as to be peeled from the body.At this time, the annular body cannot be made, It is undesirable that the diaper cannot be rolled.

Accordingly, an object of the present invention is to make it possible to roll up a pants-type diaper even after the left and right sides thereof are cut open.

[0006]

In order to solve the above problems, the present invention is based on the premise that a liquid absorbing core is interposed between a liquid permeable top sheet and a liquid impermeable back sheet, A pants-type disposable diaper in which left and right side edges of a front waist region and a rear waist region are joined to each other to form a waist opening and a pair of left and right leg openings. Under such a premise, the present invention is characterized in that the back sheet has a cross section U toward the outside of the diaper at the substantially vertical center of any of the waist regions over the entire width in the left-right direction of the region. At least one elastic member having elasticity in the waist direction is disposed on the inner surface of the fold, and at the upper and lower base ends of the fold, A perforation extending in the waist direction is performed, and the left and right ends of the fold are overlapped with the left and right edges of any of the waist regions,
That it is stuck.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference to the accompanying drawings, the details of the pants-type disposable diaper according to the present invention will be described below.

A diaper 1 shown in a partially broken perspective view in FIG.
Is from the rear. The diaper 1 is constituted by a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a liquid-absorbent core 4 interposed between these two sheets 2, 3.
It has a front waistline region 6, a rear waistline region 7, and a crotch region 8 located between these two regions 6,7. Front and back sheets 2, 3
Are joined to each other at a portion extending from the peripheral edge of the core 4. The side edge portions 6A of the front and rear waist regions 6 and 7, respectively.
7A extends outwardly of the diaper 1 and overlaps with the topsheet 2 inside, and is joined together at welding areas 9 intermittently arranged in the vertical direction of the diaper 1 to form a united body opening 11 and a pair of left and right sides. An opening 12 around the leg is defined. At the periphery of each of the openings 11 and 12, a waist elastic member 13 is provided.
A leg-surrounding elastic member 14 is disposed.
3 and 14 are joined to the inner surface of one of the front and back sheets 2 and 3 in an extended state.

In the front and rear waist regions 6 and 7 of the diaper 1, there are provided a plurality of elastic members 16 intermittently arranged at predetermined intervals in the vertical direction and extending parallel to each other in the waist direction. . The elastic member 16 is interposed between the back sheet 3 and the core 4 and joined to the inner surface of the back sheet 3 in an extended state. However, the elastic member 16 has a portion extending laterally from the side edge of the core 4 between the front and back sheets 2 and 3.

At substantially the center in the vertical direction of the rear waist region 7, the back sheet 3 is bent toward the outside of the diaper 1 in its entire width to form a fold 17 having a substantially U-shaped cross section. are doing. The fold 17 has side edges 7A of the rear waistline region 7 with its left and right end portions 18 with the top 19 of the fold facing downward.
And is fixed in the welding area 9 and is not easily separated from the outer surface. Upper and lower proximal ends 21 of fold 17
A, 21B (see FIG. 2 to be described later), the back sheet 3 has a cutting slit 22 extending intermittently in the waist direction.
A, 22B. Note that the slits 22A, 2A
2B may extend to the side end 18 of the fold or may not extend. In addition, the length of each of the slits 22A and 22B arranged in the waist direction is preferably larger than the length of a portion located between the slits in view of the separating operation. When the back sheet 3 is made of or includes a fibrous non-woven fabric, the slits are preferably oriented so as to intersect the fiber direction of the non-woven fabric from the standpoint of the separating operation.

FIG. 2 is a sectional view taken along the line II-II of FIG. The fold 17 formed by the back sheet 3 being bent in a substantially U-shape in the horizontal direction has at least one elastic member 26 extending in the waist direction joined to the inner surface near the top 19 in an extended state, and the inner surfaces overlapping each other. The two are joined by a hot melt adhesive (not shown). Except for the left and right end portions 18, the fold 17 thus configured can be separated from the outer surface of the rear waistline region 7 at the slits 22A and 22B. FIG. 2 shows the separated folds 17 in phantom lines.
The separated folds 17 have left and right ends 18 at the rear waist region 7.
And forms one ring with the region 7. The folds 17 can be separated after the worn diaper 1 is cut open back and forth in the welding areas 9 on both the right and left sides. The folds 17 at that time also form one ring with the rear waist area 7. can do.

FIG. 3 is a perspective view of the diaper 1 which has been rolled up by the user using the folds 17. The dirty diaper 1 may be removed by pulling it down as it is, or the left and right sides may be cut open to remove it.
7 is separated from the waist area. Next, the diaper 1 is rolled so that the folds 17 are located on the outside, and the folds 17 are wrapped around the diapers 1 to obtain the state shown in the figure. Since the fold 17 has elasticity due to the presence of the elastic member 26, it is convenient to fasten the rolled diaper 1 so that the mouth is not opened.
The elastic member 26 may be the same as the elastic member 16 disposed in the front and rear waist regions 6 and 7, or may have a different expansion / contraction characteristic. The fold 17 may be located in any of the front and rear waist regions 6 and 7, but it is more preferable that the fold 17 be located in the rear waist region 7 and hard to reach for an infant wearing the diaper 1.

In the diaper 1 according to the present invention, conventional materials can be used for the front and back sheets 2 and 3 and the core 4, and those materials can be joined with an adhesive such as a hot melt type adhesive, If those materials are heat-meltable, they can be joined by a welding technique. The welding area 9 in the illustrated example is an example of the latter bonding. These joining techniques can also be used to secure the side end 18 of the fold 17.

[0014]

The underpants-type disposable diaper according to the present invention has an elasticity in which the left and right ends are fixed to one of the front and rear waist regions and the side ends can be separated from the region. Since the diaper has folds, the diaper can be rolled up and discarded even when the left and right sides are cut open when the diaper is taken off.

[Brief description of the drawings]

FIG. 1 is a partially broken perspective view of a disposable diaper.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a perspective view of a rolled diaper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Top sheet 3 Back sheet 4 Core 6 Front waist area 7 Rear waist area 8 Inseam area 11 Waist opening 12 Leg opening 13,14 Elastic member 17 Fold 21A, 21B Base end 22A, 22B Separation slit 26 Elastic member

Continued on the front page (51) Int.Cl. ⁷ Identification code FI A61F 13/551

Claims (1)

(57) [Claims] 1. A liquid absorbing core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and left and right side edges of a front waist region and a rear waist region are joined to each other to form a body. A pants-type disposable diaper that forms a peripheral opening and a pair of left and right leg openings, wherein the back sheet covers the entire width in the left-right direction substantially at the center in the vertical direction of any of the front and rear waist regions. The diaper has a single fold bent outwardly in a U-shaped cross section, and at least one elastic member having elasticity in the waist direction is disposed on an inner surface of the fold. The upper and lower base ends of the fold are provided with cutting slits extending intermittently in the waist direction, and the left and right side edges of the fold are formed on the right and left side edges of any of the waist regions. The diaper according to claim 1, wherein the diaper is stacked and fixed.