JP2577976Y2 - Sanitary napkin - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a sanitary napkin. More specifically, the present invention relates to a so-called double napkin in which two napkins are vertically overlapped.

[0002]

2. Description of the Related Art Conventionally, a double napkin in which two napkins are vertically overlapped to prevent lateral leakage of menstrual blood due to deformation, displacement, wrinkles, etc. of the napkin is known. For example, Japanese Unexamined Patent Publication No. Hei 5-84261 discloses a double napkin in which one side edge of a connection sheet is joined to both sides of the upper surface of a lower napkin and the lower surface of an upper napkin is joined to the upper surface of a portion folded outward. Have been. In this napkin, the folded portion of the connection sheet is easy to move in the width and length directions, and accordingly, the relative movement of the upper and lower napkins is free. Therefore, since one movement of the upper and lower napkins does not affect the other, even if one of the napkins is displaced or wrinkled, the other napkin can prevent leakage. In a double napkin, menstrual blood is preferentially absorbed by the upper napkin, and excess menstrual blood not absorbed by the upper napkin is absorbed and held by the lower napkin.

[0003]

The folded portion of the connection sheet of the prior art covers a part of the upper surface of the lower napkin, so that it takes time to transfer menstrual blood from the upper napkin to the lower napkin. In short, the possibility of side leakage from the upper napkin increases. Also, napkins can generally prevent lateral leakage by being in close contact with a local area, but if the tightness is loosened and a gap is created between the skin and the napkin, the known napkin may cause a gap from the gap. Leaks cannot be prevented.

[0004] In view of the above, the present invention provides a double napkin in which a connecting piece made of an elastic sheet is provided on the outer side of a lower napkin facing a liquid-absorbing core, and an upper napkin is joined to the connecting piece. The solution is to prevent leakage of menstrual blood that cannot be prevented.

[0005]

Means for solving the above problems The present invention is as follows to solve the above problems.

In the present invention, a lower napkin having a liquid-absorbent core interposed between a liquid-permeable topsheet and a liquid-resistant backsheet, and an upper part having at least the liquid-absorbent core covered with a liquid-permeable topsheet. And a sanitary napkin having a fastening means for wearing shorts on the lower surface of the lower napkin.

On this assumption, the width of the upper napkin is formed larger than the width of the liquid-absorbent core of the lower napkin.
Further, a side flap made of at least a back sheet is formed on the outer side of the lower napkin facing the liquid-absorbing core, and a connecting piece made of a strip-shaped elastic sheet extending in the longitudinal direction is provided on the upper surface thereof. In this invention, both ends and one of the inner and outer edges are joined and fixed to the side flap, and the lower surface of the upper napkin is joined to the upper surface of the free edge between both ends of the other side edge. It is a feature.

[0008]

In the sanitary napkin constructed as described above, since the connecting piece for the upper napkin is provided on the side flap of the lower napkin, the connecting piece does not cover the core of the lower napkin. It does not hinder the transfer of menses between menstrual blood.

[0009] The connecting piece made of the elastic sheet is joined under elongation, and when the lower napkin curves inward in the longitudinal direction, the free edge of the connecting piece contracts and rises from the side flap to lift the upper napkin. Push it up and move it in the direction of close contact with the skin.

[0010]

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

FIG. 1 is a partially broken perspective view showing a napkin 1 which is vertically separated into a lower napkin 3 and an upper napkin 2. The lower napkin 3 has a surface sheet 6 made of a liquid-permeable nonwoven fabric, a back sheet 4 made of a liquid-impermeable plastic film, and a liquid-absorbent material made of a mixture of pulverized pulp and a superabsorbent polymer interposed between these sheets. And a core 5. The front and back sheets 6 and 4 extend from both side edges and both end edges of the core 5, and are joined to each other at the extending portions to form a side flap 10 and an end flap 11.

On the upper surface 10A of the side flap 10, a connecting piece 12 is provided. The connecting piece 12 is formed by joining a strip-shaped elastic sheet made of a thermoplastic elastomer to the upper surface 10A under elongation, folding the outer sheet along the outer edge of the core 5 outward, and stacking the two. It is formed by joining the combined sheets with a hot melt adhesive 18. The upper portion of the folded sheet has a free edge portion 14 having a contraction tendency in the longitudinal direction between both end portions 13, and an adhesive 16 is applied to the upper surface of the edge portion 14 in the central portion in the longitudinal direction. It is.

The upper napkin 2 is formed by covering an absorbent core 20 made of pulverized pulp with a surface sheet 21 made of a liquid-permeable nonwoven fabric and fusing the surface sheets 21 extending from both ends to each other. is there. The width of the upper napkin 2 is larger than the width of the core 5 of the lower napkin 3. When the two napkins 2 and 3 are overlapped, the two napkins 2 and 3 can be bonded to each other by the adhesive 16.

FIG. 2 is a side view showing a state in which the bonded upper and lower napkins 2 and 3 are worn. In the figure, the lower napkin 3 is fixed to the inside of the crotch portion of the shorts 26 shown by a virtual line by an adhesive fastening portion 25 provided on the lower surface thereof, and is curved inward together with the shorts 26. The free edge portion 14 of the elastic connecting piece 12 contracts and floats from the upper surface 10A of the side flap, and pushes up the upper napkin 2 so as to adhere to the local portion 27.

Since the upper and lower napkins 2 and 3 are adhered to each other via the adhesive 16 applied to a limited area in the center of the free edge 14 in the longitudinal direction, the free edge 14 expands and contracts on the upper napkin 2. It is not hindered by adhesion. But,
When the upper napkin 2 is thin and has relatively low rigidity, the range of application of the adhesive 16 can be extended in the longitudinal direction of the free edge portion 14 to expand the range of adhesion with the upper napkin 2. By doing so, it is possible to prevent menstrual leakage from between the lower surface of the upper napkin 2 and the free edge portion 14 over a wide range in the longitudinal direction. At this time, the upper napkin 2 gathers as the free edge portion 14 contracts.

FIG. 3 is an end view taken along line XX in FIG. As shown in the figure, even when the shorts 26 are separated from the skin 27 and the lower napkin 3 is at a lower position, the connecting piece 12 pushes up the upper napkin 2 to make it adhere to the skin 27, so that menstrual blood does not leak. The top sheet 6 and the back sheet 4 and the top sheet 6 and the connecting piece 12 are joined by a hot melt adhesive 17.

FIG. 4 is an end view similar to FIG. 3 (A).
(C) show various aspects of the connecting piece 12.
3A, a connecting piece 12 having a width approximately half that of the connecting piece 12 of FIG. 3 is used, the inner edge thereof is joined to the upper surface 10A of the flap, and the outer edge is joined to the upper napkin 2.
In (B), the connecting piece 12 is folded inward along the outer edge of the flap 10. The connecting piece 12 forms a pocket 29 inward, and the topsheet 6
Menstrual blood flowing in the width direction on the top can be accommodated here to prevent lateral leakage effectively. In (C), the connecting piece 12 having a width approximately half of that of the connecting piece 12 in (B) is used.
The outer edge is joined to the flap upper surface 10A, and the inner edge is joined to the upper napkin 2. Also in this case, the connecting piece 1
A pocket 19 can be formed between 2 and flap 10. In any of the cases (A) to (C),
Although not shown, both ends 13 of the connecting piece 12 are joined to the flap upper surface 10A.

In the napkin 1, the elastic connecting pieces 12
In addition to the elastomer, a rubber sheet, a stretchable nonwoven fabric, or the like can be used. The liquid-permeable topsheet has
Non-woven fabrics and perforated plastic sheets can be used. A liquid-resistant back sheet is a sheet that is liquid-impermeable or does not have the same liquid permeability as a top sheet, and is made of a liquid-impermeable plastic film, a gas-permeable / liquid-impermeable plastic film, Liquid-impermeable plastic film,
A hydrophobic nonwoven fabric or the like can be used. In joining the materials, in addition to an adhesive technology using a hot-melt adhesive or the like, a fusion technology can be used if the material is a heat-meltable material.

[0019]

In the napkin according to the present invention, an elastic connecting piece is provided on the side flap of the lower napkin, and the upper napkin is joined to the connecting piece, so that the lower napkin can be separated from the local area. In addition, the connecting piece pushes the upper napkin up to make it tightly adhere to the local portion, thereby preventing lateral leakage of menstrual blood. In the lower napkin, the connecting piece is outside the core side edge and does not cover the core surface,
There is no hindrance to the liquid absorption speed.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a napkin showing an upper and lower napkin separated.

FIG. 2 is a side view showing a worn state of the bonded upper and lower napkins.

FIG. 3 is an end view taken along line XX of FIG. 2;

FIG. 4 is an end view similar to FIG. 3, illustrating various aspects of a connecting piece according to (A) to (C).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Upper napkin 3 Lower napkin 4 Back sheet 5 Core 6 Top sheet 10 Flap 12 Connecting piece 13 End 14 Free edge 16 Fastening part (adhesive) 20 Core 21 Top sheet 25 Fastening means

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower napkin having a liquid-absorbent core interposed between a liquid-permeable topsheet and a liquid-resistant backsheet, and an upper napkin having the liquid-absorbent core covered by at least a liquid-permeable topsheet. In the sanitary napkin, wherein the lower napkin is provided with fastening means for wearing shorts on the lower surface of the lower napkin, the width of the upper napkin is formed to be larger than the width of the liquid-absorbent core of the lower napkin. A side flap made of at least the back sheet is formed on the outer side facing the liquid-absorbent core, and a connecting piece made of a strip-shaped elastic sheet extending in the longitudinal direction is provided on the upper surface thereof. Any one of the outer edges is joined to the side flap, and the lower surface of the upper napkin is joined to the upper surface of the free edge between both ends of the other side edge. The napkin.