JPS6130659Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sanitary napkin that absorbs and retains menstrual blood.

Conventionally, the structures of this type of napkin that have been put into practical use can be roughly divided into two types. One method is to place a water-impermeable sheet made of ultra-thin synthetic resin film/waterproof paper on the bottom surface of the absorbent body, roll up both sides of the sheet onto the top surface of both sides of the absorbent body, and then wrap the entire sheet into a water-permeable sheet made of non-woven fabric. Another method is to position the water-impermeable sheet on the lower surface of the absorbent body, and have both sides of the sheet protrude outward from both sides of the absorbent body. The water-permeable sheet is covered with the water-permeable sheet having the same size as the water-impermeable sheet, and the extending portions of both sheets are joined to form a side flap. On the other hand, a napkin has been proposed in which side flaps are provided by extending both sides of a water-impermeable sheet from both sides of a napkin.

However, in the above-mentioned practical napkins, the water-permeable sheet located on the surface is also located at the outer edge of the napkin. Menstrual blood also reaches the outer edge, and as a result, menstrual blood leaks and stains the underwear, causing discomfort to the wearer. In addition, the napkin according to the above-mentioned proposal is made of an ultra-thin synthetic resin film such as polyethylene or waterproof paper that does not have elasticity as a water-impermeable sheet, so it may deform irregularly when worn or fold into the back of the napkin. The side flaps do not function as leak-proof belts because they get caught in the leg laces of the shorts being worn. Incidentally, such a drawback is also recognized in the latter napkin which has been put into practical use.

The purpose of the present invention is to provide a sanitary napkin with side flaps that is improved so that the side flaps can function satisfactorily as a leak-proof band. The gist of the present invention is to provide a sanitary napkin comprising at least a water-permeable top sheet, a water-impermeable back sheet, and an absorbent body located between the two sheets, in which hydrophobic elastic foam sheets are provided on both sides in the width direction of the napkin. are integrally arranged to form a side flap by at least the foam sheet, and the outer edge of the foam sheet is at least 1 length from the outer edge of the top sheet.
The napkin is characterized in that it protrudes by mm.

Further, the present invention will be explained based on the illustrated embodiments as follows.

Each napkin 1 shown in FIGS. 1 to 5 consists of a water-permeable top sheet 2 made of nonwoven fabric, a water-permeable back sheet 3 made of ultra-thin synthetic resin film such as polyethylene, waterproof paper, etc., and a water-permeable back sheet 3 made of water-absorbing paper or defibrated pulp. The absorbent body 4 includes an absorbent body 4 made of the like, and hydrophobic elastic foam sheets 5, 5.

In the napkin 1 shown in FIG.
upper member 6 and lower member 7 which is wider than this.
and a back sheet 3 on the lower surface of the lower member 7.
position the side 3a of the lower member to the side 7a of the lower member.
The foam sheet 5 is folded back to the upper surface, and the foam sheet 5 is positioned between the upper surfaces of the side portion 6a of the upper member 6 and the side portion 6a of the side portion 6 of the lower member 7. While positioning the top sheet 2,
It is constructed by integrally joining the side part 2a of the top sheet 2 and the inner part 5b of the foam sheet 5, and the side part 3a of the back sheet 3 and the outer part 5a of the foam sheet 5, and the side part of the lower member 7 of the absorbent body 4. 7a, the side part 3a of the back sheet 3, and the side part 5 of the foam sheet 5.
A side flap 8 is formed by a. Note that a cotton-like fiber layer 9 with a low density such as rayon, polyester, polypropylene, etc. is interposed between the top sheet 2 and the lower member 7 of the absorbent body 4.

In the napkin 1 shown in FIG.
a and the side part 3a of the back sheet 3 are made to protrude outward, and the sheet is interposed between these side parts 2a and 3a so that the outer part 5a of the foam sheet 5 protrudes outward, so that the foam sheet 5 is integrally formed. The side flaps 9 are constructed by joining together, and the side portions 2a of the top sheet 2, the side portions 3a of the back sheet 3, and the foamed sheet 5 form a side flap 9.

In the napkin 1 shown in FIG.
The upper surface of the top sheet 2 is covered with the side 2a of the top sheet 2.
are located on the lower surface of the side portions of the absorbent body, and the back sheet 3 is located on the entire lower surface of these, and the inner edge 5b of the foam sheet 5 is placed between the side portion 2a of the top sheet 2 and the side portion 3a of the back sheet 3.
The foamed sheet 5 forms side flaps 9 that protrude outward.

In the napkin 1 shown in FIG.
Place the back sheet 3 on the bottom surface of the
a is folded back to the upper surface of the side part of the absorbent body 4, and the whole is covered with the top sheet 2, and the inner part 5a of the foamed sheet 5 is integrally joined to the top sheet 2 located on the lower surface, and A side flap 9 is formed by the protruding foam sheet 5.

In each napkin 1, as is clear from the illustration, the outer edge of the foam sheet 5 protrudes from the outer edge of the top sheet 2 covering the upper surface of the absorbent body 4, and this is the most distinctive feature of the present invention. ,
The protrusion length is 1 mm or more, preferably 3 to 15 mm, and more preferably 5 to 10 mm.

The foam sheet 5 is preferably made of foam polyethylene. The foam type may be either independent or continuous, but preferably independent. In addition, the foam sheet 5 has the required rigidity and
To obtain elasticity, the width is 5 to 20 mm, preferably 10 to 15 mm.
The thickness in mm is 0.3 to 5 mm, preferably 1 to 1.5 mm.

According to the present invention having the above configuration, the outer edge of the foamed sheet 5 forming the side flaps 8 and 9 covers the top surface of the absorbent body 4.
Since the foam sheet is hydrophobic, even if menstrual blood is absorbed and diffused into the top sheet and reaches the outer edge of the napkin 1, the foam sheet protrudes from the outer edge of the napkin 1 by an appropriate length. There is no diffusion in the sheet 5, and the foamed sheet can sufficiently function as a leak-proof band against menstrual blood. Furthermore, since the foam sheet 5 is given the required width and thickness to have the required rigidity and elasticity, the side flaps 8 and 9 may deform irregularly when the napkin 1 is worn, or fold into the back surface of the napkin 1. It is less likely to get caught in the laces of the shorts you are wearing.

[Brief explanation of the drawing]

The drawings show embodiments of the napkin of the present invention, FIG. 1 is a cross-sectional perspective view of the napkin, and FIGS.
FIG. 4 is a cross-sectional view of the side of the napkin in a different aspect from FIG. 1. 1... napkin, 2... top sheet, 3...
Back sheet, 4... absorber, 5... foam sheet.

Claims (1)

[Claims for Utility Model Registration] (1) A sanitary napkin comprising at least a water-permeable top sheet, a water-impermeable back sheet, and an absorbent body located between the two sheets, in which both sides in the width direction of the napkin are made of hydrophobic elastic foam. The napkin characterized in that the sheets are integrally arranged to form a side clap using at least the foam sheet, and the outer edge of the foam sheet projects by at least 1 mm in length from the outer edge of the top sheet. (2) The hydrophobic elastic foam sheet has a width of 5 to 20 mm and a thickness of
The first range of claims for utility model registration is 0.3 to 5 mm.
Sanitary napkins as described in section. (3) The sanitary napkin according to claim 1, wherein the hydrophobic elastic foam sheet is made of foamed polyethylene.