JP2553363Y2 - Sanitary napkin - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary napkin (or sanitary pad) for absorbing and retaining menstrual blood, and more particularly, to a wing for enclosing and fixing a crotch part of worn pants. The present invention relates to a sanitary napkin having mold flaps extending from both side edges.

[0002]

2. Description of the Related Art Conventionally, in a sanitary napkin, a liquid-absorbing core is interposed between a liquid-permeable top sheet and a liquid-impermeable backing sheet, and the core is disposed outside both side edges of the core in the longitudinal direction. It is known that the front and back sheets are extended in a direction to form a wing-type flap.

[0003] A napkin provided with such a wing-type flap is used by folding the flap to the back of the shorts to be worn and fixing it with an adhesive applied to the back of the flap, but the flap has low rigidity, in other words, flexibility. Is high (so-called low waist), so that the flap is often twisted during the fixing operation. In such a case, the flaps cannot be used because the depressed portions are bonded to each other by the adhesive on the back surface.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned disadvantage by reinforcing the flap.

[0005]

According to the present invention, a liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable backsheet, and the liquid-absorbent core is separated from both side edges at the longitudinal center of the core. A sanitary napkin having a flap having a wing portion formed from the back sheet portion extended in the direction and an upper surface sheet joined to at least an upper surface of the back sheet portion, wherein at least a back surface of the wing portion is coated with an adhesive. And the following features.

By providing a reinforcing layer on the wing portion,
The stiffness of the region of the wing portion where the reinforcing layer is provided is higher than the stiffness of the wing portion where the reinforcing layer is not provided.

In an embodiment, the reinforcing layer is interposed between the back sheet portion and the top sheet. The top sheet is formed of a part of the top sheet or a liquid separate from the top sheet. Formed from barrier sheet.

[0008]

In the napkin according to the present invention having the above-mentioned structure, the back surface of the napkin is brought into contact with the inner surface of the crotch portion of the wearing pants, and the flap is folded back to the back surface of the crotch portion and fixed with the adhesive. At this time, the wing portion has an appropriate rigidity in the reinforcing layer, and is not twisted or fixed while being twisted.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. In FIG. 1 to FIG.
Are a liquid-permeable top sheet 11 and a liquid-impermeable back sheet 12
And a flap 1 having a liquid-absorbent core 13 and a wing portion 14 which are smaller in length and width dimension than these, so that these outer extension portions 11a and 12a are formed.
5.

The back sheet 12 is formed to be larger in width than the top sheet 11, so that the back sheet 12 is formed.
Is extended outward from the edge of the laterally extending outer portion 11a of the topsheet 11 in the lateral direction. The outer extending portions 11a and 12a are joined to each other with an adhesive (not shown). Further, the back sheet 12
Is located approximately at the center in the longitudinal direction, preferably a napkin 1.
A second outer extension 12b is formed outwardly from both outer extensions 12a in the lateral direction at a position deviated toward the front end 10a.

The flap 15 having the wing portion 14 is
Liquid barrier sheets 17 arranged on both sides of napkin 10
And the outer extending portions 11a, 12 of the front and back sheets 11, 12
a. That is, the inner portion 17a that covers the respective portions of the top sheet 11 near the both side edges of the core 13 and the upper surface of the outer extension 12a of the back sheet 12, and the upper surface of the second outer extension 12b of the back sheet 12 The outer peripheral edge of the liquid barrier sheet 17 having the outer extending portion 17b to be folded and the folded portion 17c to the back surface is joined to the upper surface of the lower surface sheet 12 located on the lower surface by fusion bonding means, and the liquid barrier sheet 17 is formed by folding. 17d inside edge
Is bonded to the upper surface of the topsheet 11 along the side edge of the core 13 under heat and pressure (reference numeral 18 indicates the bonding line), and thereby, the liquid barrier sheet is formed. A bonding line 18 and a pocket 19 (see FIG. 5) are formed between the inner portion 17a of the base 17 and the topsheet 11. The joining line 18 is preferably curved outward at a portion where the wing portion 14 faces, as indicated by reference numeral 18a, in order to deepen the pocket 19 at that portion.

Each of the wing portions 14 comprises an outer extending portion 17b of the liquid barrier sheet 17 and a second
Each reinforcement layer 27 is interposed integrally with the outer extension 12b. Thus, each wing section 14
When the reinforcing layer 27 is provided, each wing portion is
Although it is easy to bend along the inner edge of the wing and the folded edge at the time of use described below is neat, the reinforcing layer 27 may be continuous between the wing portions 14. Also,
The reinforcing layer 27 may be provided on the outer surface of the back sheet 12. The reinforcing layer 27 is made of paper, nonwoven fabric, synthetic resin film,
It can be formed by applying a synthetic resin foam sheet, hot melt (including foam), or the like. Strong), for example, a synthetic resin foam sheet. Such a wing part 14
Is preferably deviated toward the front end of the napkin 10 as shown in FIG.

The outer surface of the central region of the back sheet 12 has a band-shaped adhesive 20 parallel to the length direction thereof, and the adhesive 2 has a rectangular shape on the outer surface of the central region of the second outer extension 12b of the back sheet 12.
1 are respectively applied, and the pressure-sensitive adhesives 20, 21 are covered with release sheets 22, 23, respectively, to protect them.

In FIG. 4, a cord 24 is interposed along the inside of the folded inner edge 17d of the liquid barrier sheet 17, and at least both ends in the longitudinal direction thereof are fixed to the liquid barrier sheet 17. The cord-like material 24 preferably has elasticity in its length direction or cushioning property in its thickness direction, but may have non-stretching or non-cushioning properties. If it has elasticity, it will be attached under extension in its length direction.

In the napkin 10 having the above-mentioned structure, first, the release sheet 22 is peeled off, and the central area of the napkin 10 is adhered to the inner surface of the crotch abutment 25 (see FIG. 5) of the wearing pants with the adhesive 20. 23 is peeled off and the wing portion 14
Is folded back on the outer surface of the crotch portion 25 and adhered with the adhesive 21. When the napkin 10 is fixed to the wearing pants in this way, as shown in FIG.
4, the flap 15 facing the part
Of the inner edge 17a of the inner edge 17a is pulled outward.
d is lifted, and the pocket 19 is opened.

Although not shown, the napkin does not have to have the structure shown in the illustrated embodiment in order to solve only the intended problem of the present invention. For example, without using the liquid barrier sheet 17, the second outer extension 12b
Backsheet 12 having the same size and shape as backsheet 12 having
Is formed from the second outer extending portion 12b of the back sheet 12 and the top sheet portion having the same size and shape as the wing portion 1.
4 may be formed.

[0017]

In the present invention having the above-described structure and operation, the wings are not reinforced by the reinforcing layer, so that the wings are not swayed. It is possible to use napkins without worrying that there is no failure that it becomes impossible to use and that it adheres to the shorts worn out and it is not fixed enough to this and the napkin easily slips it can.

[Brief description of the drawings]

FIG. 1 is a top perspective view of a sanitary napkin according to an embodiment of the present invention, with a portion cut away.

FIG. 2 is a rear perspective view of the napkin.

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is an enlarged cross-sectional view of a napkin according to another embodiment at a site equivalent to FIG. 3;

FIG. 5 is an enlarged cross-sectional view showing a state in which the napkin shown in FIG. 3 is fixed to a crotch abutment portion of wearing pants.

[Explanation of symbols]

 11 Top sheet 12 Back sheet 13 Core 14 Wing part 15 Flap 17 Liquid barrier sheet 27 Reinforcing layer

Claims (4)

(57) [Scope of request for utility model registration] 1. A liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and extends outward from both side edges substantially at the center in the length direction of the core. A sanitary napkin having a flap having a wing portion formed from the back sheet portion and an upper sheet bonded to at least the upper surface of the back sheet portion, wherein at least the back surface of the wing portion is coated with an adhesive, By providing the reinforcing layer, the stiffness of the region of the wing portion provided with the reinforcing layer is higher than the stiffness of the wing portion when the reinforcing layer is not provided. napkin. 2. The napkin according to claim 1, wherein said reinforcing layer is interposed between said back sheet portion and said top sheet. 3. The napkin according to claim 1, wherein said top sheet is a part of said top sheet. 4. The napkin according to claim 1, wherein said top sheet is a liquid barrier sheet separate from said top sheet.