JP3746883B2 - Sanitary items - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sanitary product that can realize the softness per skin of both side parts hitting the inner crotch and remove the discomfort that is a concern at the time of wearing.
[0002]
[Prior art]
As a conventional sanitary product, as shown in FIGS. 14 and 15 , a body fluid absorber (c) is disposed between a water-permeable top sheet (a) and a water-impermeable back sheet (b), It is known that the peripheral edges of the sheets (a) and (b) are brought into contact with each other on the outer periphery of the body fluid absorber (c) and heat-sealed, and then the outer periphery is cut into a predetermined product form ( In FIG. 14 , the shaded portion indicates the heat-sealed portion).
[0003]
However, when the top sheet (a) and the back sheet (b) are heat-fused in this way, the peripheral edges of both sheets (a) and (b) are cured by the fusion. Therefore, even when the outer periphery is cut and shaped after heat-sealing, the side edge portion that has become hard when the product is worn may hit the inner crotch and cause discomfort.
[0004]
[Problems to be solved by the invention]
This invention intends to provide a sanitary product that can soften the skin contact of both side edges that hit the inner crotch and can avoid discomfort during wearing.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention adopts a back sheet ( 3 ) in which both side edges along the longitudinal direction are folded inward to form a bag-shaped side edge ( 5 ) , and the top sheet ( 2 ) peripheral and by Taise' the outer circumference of the body fluid absorbent member (4), the peripheral edge to form a (10) consisting of side edges along the longitudinal direction (8) edges along the transverse direction (9), The outer peripheral edge of the side edge ( 8 ) that contacts the inner crotch is used as a non-heated fusion part, and the peripheral parts (10) of both sheets ( 2 ) and ( 3 ) excluding the non-heated fusion part are heated and fused. And
[0007]
Further, the present invention provides a method of folding back the side edge of the back sheet inward before polymerization of the body fluid absorber and the top sheet, and sandwiching the folded edge between the back sheet and the body fluid absorber, or after polymerization of the body fluid absorber. Before the polymerization of the back sheet, the side edge of the back sheet is folded inward, and the folded edge is sandwiched between the body fluid absorber and the top sheet, or the side edge of the back sheet is folded inward after the body fluid absorber and the top sheet are polymerized. The folded edge can be polymerized on the side edge surface of the top sheet, and a string-like elastic body can be held inside the bag-shaped side edge of the back sheet formed by folding. The body fluid absorber is composed of a laminate of an aggregate of pulverized pulp and an absorber holding a polymer absorbent.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. 1 to 5 showing a first preferred embodiment of a sanitary product according to the present invention, (1) shows a sanitary product according to the present invention, and a water-permeable top sheet (2) and a water-impermeable back sheet (3 ) Between which the body fluid absorber (4) is disposed, and is formed in a substantially rectangular shape as a whole. The top sheet (2) is formed of a material such as a non-woven fabric that gives a comfortable feeling to the wearer's skin, and can pass through the body fluid discharged to the surface and move to the body fluid absorber (4). . The back sheet (3) is composed of a resin sheet such as a polyethylene sheet that can prevent leakage of bodily fluid absorbed by the bodily fluid absorber (4), and an adhesive for attaching the sanitary product (1) to the underwear on the outer surface. An agent is applied.
[0009]
In the present invention, when the sanitary product (1) is constituted, both side edges along the longitudinal direction of the back sheet (3) are folded inward to form the bag-like side edges (5). The peripheral edges of the back sheet (3) and the top sheet (2) are brought into contact with each other on the outer periphery of the body fluid absorber (4), and at least the outer periphery of the contact portion with the inner crotch as shown by the shaded portion in FIG. The body fluid absorber (4) is held between the sheets (2) and (3) by heat-sealing the sheets (2) and (3) at the side edges excluding the edges and the edges along the short direction. I am letting.
[0010]
Therefore, even if the fused part is hardened by heat-sealing of both sheets (2) and (3), heat-sealing is not performed at the part of the outer periphery of the side edge corresponding to the wearer's inner crotch. The softness of the is ensured. For this reason, at the time of wearing, the non-fused portion hits the inner crotch, and the discomfort that is a concern at the time of wearing is avoided.
[0011]
In the above-described embodiment, only the inner side leaving the outer peripheral edge is fused with a narrow width at the contact portion with the inner crotch to prevent peeling of both sheets (2) and (3). In the case where the body fluid absorber (4) can be reliably positioned and held by fusing the side edges sandwiching the contact portion, the whole area of the portion that hits the inner crotch can be non-fused.
[0012]
In the first embodiment, both sheets (2) and (3) are heat-sealed on the entire circumference of the body fluid absorber (4). However, heat-sealing of the side edges can be omitted. That is, FIG. 6 shows an example in which the heat fusion is omitted . In this example , both side edges along the longitudinal direction are not heat fused, and both sheets (2 ) (3) is heat-sealed. Therefore, in this embodiment, since the side edges of both sheets (2) and (3) are not heat-sealed at all, the side edges that are not melted always hit the inner crotch when worn. For this reason, even when a deviation occurs in the wearing position, the fused part that has become hard should not hit the inner crotch, and there is no possibility of causing discomfort.
[0013]
If the side edge fusion is omitted as in this embodiment, the body fluid absorber (4) may be misaligned or the body fluid absorbed by the body fluid absorber may be leaked. Since the side edge of the sheet (3) is a bag-like side edge (5) folded inward, the function of preventing displacement of the body fluid absorber (4) and prevention of leakage of body fluid absorbed by the body fluid absorber (4) There is no risk of functional degradation.
[0014]
In both the first and second embodiments, the width of the top sheet (2) is narrower than the width of the back sheet (4), but both sheets as in the third embodiment shown in FIG. (2) (3) may be the same width.
[0015]
Further, in any of the first to third embodiments, the body fluid absorber (4) and the top sheet (2) are polymerized after folding both side edges of the back sheet (3) inward to form the back sheet (3). By sandwiching the folding edge between the back sheet (3) and the body fluid absorber (4), the folding edge of the back sheet is pressed down by the weight of the body fluid absorber (4) superimposed on the back sheet (3). Thus, the reduction in production efficiency due to folding is prevented, but the time of folding is not limited to that of the above embodiment.
[0016]
That is, as in the fourth embodiment shown in FIG. 8, after the body fluid absorber (4) is polymerized, both side edges of the back sheet (3) are folded inward, and then the top sheet (2) is polymerized to form the back sheet. By sandwiching the folded edge of (3) between the body fluid absorber (4) and the top sheet (2), the so-called horizontal leakage prevention effect is enhanced, or as in the fifth embodiment shown in FIG. After the body fluid absorber (4) and the top sheet (2) are polymerized, the side edge of the back sheet (3) is folded inward, and the folded edge is polymerized on the surface of the side edge of the top sheet (2) to prevent side leakage Can be made higher.
[0017]
FIG. 10 shows a sixth preferred embodiment of the sanitary product according to the present invention. In the sixth embodiment, the elastic body (6) is formed by sandwiching the elastic body (6) having a string shape inside the bag-like side edge (5) of the back sheet (3) formed by folding. A three-dimensional gather can be formed by utilizing the contraction action of. Accordingly, in the case of the sixth embodiment, a three-dimensional gather is formed on the side edge of the back sheet (3) by the contracting action of the elastic body (6) when worn, so that a more effective transverse leakage prevention effect can be obtained. . FIGS. 11 to 13 show a preferred modification of the absorbent body of the present invention, which is absorbed on both sides of the crushed pulp holding the polymer absorbent body on the upper part of the absorbent body (4) mainly composed of aggregates of crushed pulp. An absorbent body (7) sandwiched with paper is arranged. The absorbent body (7) is arranged at a slightly smaller area at the center of the ground pulp absorbent body (4).
[0018]
In each of the embodiments, the case where the present invention is applied to a sanitary product has been described. However, the present invention can also be applied to a cage sheet or an incontinence pad.
[0019]
【The invention's effect】
According to the invention described in claim (1) and claim (2), the both sides of the back sheet are folded inward to form the bag-like side edges, and the top portion is excluded from the contact portion with the inner crotch. Since the sheet and the back sheet are heat-sealed, the softness per skin of both side portions hitting the inner crotch is ensured and wearing discomfort is avoided.
[0020]
In addition, according to the invention described in claim (3), the return of the folded edge of the back sheet can be prevented by utilizing the pressing action of the body fluid absorber, so that it is possible to prevent a decrease in production efficiency due to folding. it can.
[0021]
Furthermore, according to the invention described in claim (4) and claim (5), since the side edge of the body fluid absorber can be positioned on the bag-like side edge formed by folding the back sheet, According to the invention described in claim (6), since a three-dimensional gather can be formed at the bag-like side edge of the back sheet, a higher horizontal leakage prevention effect can be achieved. Can be obtained.
[Brief description of the drawings]
FIG. 1 is a plan view showing a first preferred embodiment of a sanitary product according to the present invention. FIG. 2 is a cross-sectional view showing a state before heat fusion of the first embodiment shown in FIG. FIG. 4 is an enlarged cross-sectional view taken along the line AA in FIG. 1. FIG. 5 is an enlarged cross-sectional view taken along the line BB in FIG. 6 is a plan view showing an example in which the side edge is not heat-sealed . FIG. 7 is a plan view showing a third preferred embodiment of the sanitary product according to the present invention. FIG. 8 is a fourth preferred sanitary product according to the present invention. FIG. 9 is a plan view showing a fifth preferred embodiment of the sanitary product according to the present invention. FIG. 10 is a plan view showing a sixth preferred embodiment of the sanitary product according to the present invention. FIG. 12 is a plan view showing a preferred variant of the absorbent body for sanitary products according to the present invention. FIG. 13 is a cross-sectional view showing a state before heat-sealing according to the embodiment. FIG. 13 is a perspective view before heat-sealing according to the embodiment shown in FIG. 15] Cross-sectional view of the conventional example shown in FIG. 11 before heat-sealing [Explanation of symbols]
(1) Sanitary products
(2) Top sheet
(3) Back sheet
(4) Body fluid absorber
(5) Bag-shaped side edge
(6) Elastic body
(7) Absorber holding polymer absorbent
( 8 ) Side edge
( 9 ) Edge
(10) Perimeter

Claims (6)

In the sanitary product ( 1 ) in which the body fluid absorber ( 4 ) is disposed between the water-permeable top sheet ( 2 ) and the non-water-permeable backsheet ( 3 ) , both side edges along the longitudinal direction are folded inward to form a bag shape. The back sheet ( 3 ) on which the side edge ( 5 ) is formed is brought into contact with the periphery of the top sheet ( 2 ) at the outer periphery of the body fluid absorber ( 4 ) , and the side edge ( 8 ) along the longitudinal direction is short. A peripheral edge (10) consisting of an edge ( 9 ) along the hand direction is formed, the outer edge of the side edge ( 8 ) in contact with the inner crotch is used as a non-heated fusion part, and the non-heated fusion part is excluded. A sanitary product characterized in that the peripheral portions (10) of both sheets ( 2 ) and ( 3 ) are heat-sealed. The sanitary product according to claim 1, wherein the side edge of the back sheet is folded inward before the body fluid absorber and the top sheet are polymerized, and the folded edge is sandwiched between the back sheet and the body fluid absorber. 2. The physiology according to claim 1, wherein the side edge of the back sheet is folded inward and the folded edge is sandwiched between the body fluid absorbent and the top sheet after polymerization of the body fluid absorber and before polymerization of the top sheet. Supplies. The sanitary product according to claim 1, wherein after the body fluid absorber and the top sheet are polymerized, the side edge of the back sheet is folded inward and the folded edge is polymerized on the side edge surface of the top sheet. The sanitary product according to any one of claims 1 to 4, wherein an elastic body having a string shape is sandwiched inside a bag-like side edge of the back sheet formed by folding. The sanitary product according to any one of claims 1 to 5 , wherein the body fluid absorber comprises a laminate of an aggregate of pulverized pulp and an absorbent body holding a polymer absorbent.

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