JPH0771567B2 - Disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is directed to a portion of a flap having an elastic elastic member attached to the opposite side of the crotch region, which is bent outward to cause leakage of excrement from around the legs. The present invention relates to a disposable diaper configured to effectively prevent the above.

[Conventional technology]

Conventionally, in a disposable diaper, a flap that is more flexible than the central portion between them is formed on the opposite side, and a stretchable elastic member is attached to the outer side, and the flap is folded back inward and each end of this folded back portion is attached. By fixing
It is known that a pocket (bag) is formed on the opposite side.

[Problems to be solved by the invention]

The known diaper is intended to prevent the leakage of excrement from the wearer's inseam or around the legs by forming the pocket portion. However, at the time of wearing, the inner edge of the flap to which the elastic elastic member is attached is always given a tendency to be pulled toward the wearer's thigh by the contracting action of the elastic elastic member. Therefore, not only is the center portion between the flaps on the opposite side bent to the front side significantly to give a bad appearance and wearing feeling, but also the range of the body portion covered by the diaper is significantly reduced, and the opening of the pocket portion is significantly reduced. Is closed and the part does not work very effectively.

[Means for solving problems]

A main object of the present invention is to provide a disposable diaper capable of solving the above problems by a relatively simple means.

The present invention for achieving the above object is to form a side flap by forming an absorbent core between a water-permeable topsheet and a water-impermeable backsheet from the outer peripheral edge of the core so that the front and backsheet portions extend outward. In the disposable diaper in which the elastic elastic member is attached near the outer edge of the side flap in the crotch region of the diaper, the side flap is folded back inward between the outer edge and the outer edge of the core. The folded portion is further folded outward to form a fold portion, the fold portion is fixed in the front side region and the back side region of the diaper to form a pocket portion on the opposite side of the crotch region, and the elastic elastic member is It is characterized in that it is attached to the second outwardly folded portion and a recessed portion is formed at the outer edge of the pocket portion.

〔Example〕

The present invention will be described below based on the illustrated embodiments.

As shown in FIGS. 1 and 2, a water-permeable surface sheet 1, and
The water-impermeable backsheet 2 and the water-permeable backsheet 2 are formed by cutting these raw sheets into squares of appropriate size. Front and back sheet 1,
Between the two, the absorbent core 3 formed in a rectangular shape smaller than these is formed so that the front and back sheet portions extend outward from the outer peripheral edge of the core to form the end flaps 4 and the side flaps 5. Intervened. In this case, at least the outer peripheral region where the front and back sheets 1 and 2 meet and the region where the front and back sheets and the core 3 are in contact with each other, for example, are joined with a hot melt adhesive applied in a stripe shape.

The elastic elastic member 9 is attached to the opposite side of the crotch region 6 thus joined, that is, the outer portion 5a of the flap 5, the outer portion is folded back inward, and the folded portion is joined by the adhesive or the welding means. Naturally, the elastic elastic member 9 is formed in a size slightly extending from the opposite side edge of the topsheet 1 of the backsheet 2, and is covered by folding back the extended portion inside. You may intervene between.

As shown in FIGS. 2 to 4, the portion 5b of the flap 5 is folded back inward through the first folding line 10 between the outer edge of the core 3 and the elastic member 9, and the folded portion 5b A fold portion 11 is formed by folding back a portion having substantially the same width as the portion 5a located on the inner side, and the fold portion 11 is fixed in the front region 7 and the back region 8 with the adhesive or welding means. As a result, the pocket portion 12 is formed on the opposite side of the crotch region 6. Thus formed is the outermost edge of the diaper, which is a substantially central portion along the first fold line 10, that is, the outer edge of the pocket portion 12 in the crotch region 6 is formed to form the recessed portion 12a and the outer edge thereof. It is joined by the adhesive or the welding means. Further, a concave portion 13 is formed by arcuating a central portion along the outer end of the front side region 7 inwardly, and the central portion along the outer end of the back side region 8 faces the concave portion 13. Convex part of the same shape and size as the concave part 13 so that the part extends outward in an arc shape
14 is formed. Further, the outer edges of the corners of the regions 6, 7 and 8 are formed by curves. In this case, in order to use the materials of the front and back sheets 1 and 2 without waste, when the front and back sheets can be cut from those raw sheets, the recessed portion 13 and the protruding portion 14 are It may be formed. By the way, the recessed part 12 improves compatibility, the recessed part 13 prevents the diaper from hitting the navel of the newborn baby, and the protruding part 14 prevents excrement from leaking from the central part of the dorsal region. Are provided to prevent the above. Further, the outer edge of the diaper is formed in a curved line except for a part thereof in order to improve appearance and wearability. An adhesive tape 15 is attached to the opposite side of the back side region 8 so as to extend outward.

The top sheet 1 is made of a porous non-woven fabric, a porous plastic film or the like, and the back sheet is made of a breathable waterproof plastic film or a laminate of this with a non-woven fabric.
Each is made.

The core 3 is made of cotton-like pulp, a mixture of the pulp and superabsorbent polymer particles, and the like.
The outer peripheral edge of 2 is formed to extend to a predetermined length, and is displaced to the front region 7 in order to increase the absorption capacity of excrement in the back region 8 and prevent its leakage. is there. In the illustrated example, it is formed in a rectangular shape, but in some cases, the front back regions 7 and 8 may be wider than the crotch region 6 and may be formed in a so-called hourglass.

The diaper thus formed has a form as shown in FIGS. 5 to 8. That is, the flap 5 in the crotch region
Stands up in the upward direction by the expansion and contraction action of the elastic elastic member 9, and at the upper part of the standing portion, the elastic elastic member 9
The second outwardly folded-back portion in which is located maintains the folded-back state and has a tendency to warp outward. Therefore, it can be said that the diaper has a boat shape as a whole. The diaper has such a shape that the flap 5 has a very high flexibility as compared with the core 3, the elastic elastic member 9 expands and contracts relatively strongly, and the second folded portion is provided. Is directed to the outside.

In the figure, reference numeral 16 denotes a second adhesive tape, which is for allowing reuse of the first adhesive tape 10 without damaging the surface sheet 1, and the non-adhesive surface is It is temporarily attached to the adhesive surface of the first adhesive tape 15. Incidentally, the use of the second adhesive tape 16 is known.
Further, a part or all of the flap 5 may be formed by appropriately adding a flexible sheet to the outside of the topsheet 1 and / or the backsheet 2.

〔The invention's effect〕

According to the diaper of the present invention having the above-described structure, the contracting action of the elastic elastic member causes the flap on the opposite side of the crotch region to stand up, and the upper portion of the flap where the elastic elastic member is located is the outside. When the diaper is worn, the part where the elastic elastic member is located is not pulled toward the wearer's thigh root side when wearing the diaper, and the part is pressed against the part as far as possible from the thigh root part to widely cover the inseam. In addition, the opening of the pocket portion formed in the crotch region is not closed. Therefore, not only the natural wearing condition but also the pocket portion can effectively receive the excrement and prevent the leakage around the legs.

[Brief description of drawings]

The drawings show one embodiment of the diaper of the present invention. FIGS. 1 to 3 are development plan views of the diaper forming process, and FIG.
FIG. 5 is a developed plan view of a completed state, FIG. 5 is a perspective view of the completed state, FIG. 6 is a sectional view taken along line XX of FIG. 5, and FIG. 7 is Y of FIG.
-Y line sectional drawing, FIG. 8 is FIG. 5 ZZ sectional drawing. 1 ... Front sheet, 2 ... Back sheet 3 ... Core, 5 ... Side flaps 6 ... Inseam area, 7 ... Front area 8 ... Dorsal area, 9 ... Elastic elastic member 12 ... Pocket area , 12a ...... recessed part

Claims (1)

[Claims] 1. An absorbent core is interposed between a water-permeable topsheet and a water-impermeable backsheet so that the front and backsheet portions extend outward from the outer peripheral edge of the core to form side flaps. In a disposable diaper in which a stretchable elastic member is attached near the outer edge of the side flap in the crotch region of the diaper, the side flap is folded inward between the outer edge and the outer edge of the core, and the folded portion is further outward. And folding back to form a fold portion, fixing the fold portion in the front side region and the back side region of the diaper to form a pocket portion on the opposite side of the crotch region, and the elastic elastic member extends to the second outside. The diaper is characterized in that the diaper is attached to a folded-back portion of the diaper and a recessed portion is formed on an outer edge of the pocket portion.