JP2553363Z - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a sanitary napkin (or sanitary pad) for absorbing and retaining menstrual blood.
More particularly, the present invention relates to a sanitary napkin having wing-shaped flaps extending from both side edges for wrapping around and fixing to a crotch portion of worn pants. 2. Description of the Related Art Conventionally, in a sanitary napkin, a liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and both sides of a central portion in the longitudinal direction of the core. It is known that the front and back sheets are extended outward from an edge to form a wing-type flap. A napkin provided with such a wing-type flap is used by folding the flap to the back surface of the shorts to be worn and fixing it with an adhesive applied to the back surface of the flap. 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] An object of the present invention is to eliminate the above-mentioned defect by reinforcing the flap. [0005] The present invention is based on the idea that a liquid-absorbent core is interposed between a liquid-permeable topsheet and a liquid-impermeable backsheet, and both sides of a central portion in the longitudinal direction of the core. A flap having a wing portion formed from the back sheet portion extended outward from an edge and at least a top sheet joined to the upper surface of the back sheet portion, and an adhesive is applied to at least the back surface of the wing portion. Assuming a sanitary napkin, it has the following features. A reinforcing layer is provided independently on each of the wing portions, and each of the reinforcing layers is provided with a reinforcing layer.
A side edge is separated from each side edge of the core, and the rigidity of the region of the wing portion provided with the reinforcing layer is higher than the rigidity of the wing portion without the reinforcing layer. In an embodiment, the reinforcing layer is interposed between the back sheet portion and the top sheet. The top sheet is a part of the top sheet or a liquid different from the top sheet. Formed from barrier sheet. The napkin according to the present invention having such a configuration has its back surface abutted on 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. The present invention will be described below with reference to the drawings. 1 to 3, the napkin 10 includes a liquid-permeable top sheet 11, a liquid-impermeable back sheet 12,
These outer extensions 11a, 12a are smaller in length and width than these.
And a flap 15 having a wing portion 14. The back sheet 12 is formed so as to be wider in width than the top sheet 11, so that the outer extension 12 a in the lateral direction of the back sheet 12 is separated from the edge of the outer extension 11 a in the lateral direction of the top sheet 11. It extends outward. Outer extension 11
a and 12a are joined to each other by an adhesive (not shown). Further, the back sheet 12
The second outwardly extending portion 12a extends outwardly from both laterally outwardly extending portions 12a in a substantially central portion in the longitudinal direction thereof, preferably at a position offset toward the front end 10a of the napkin 10.
b is formed. The flap 15 having the wing portion 14 includes a liquid barrier sheet 17 disposed on both sides of the napkin 10 and outer extension portions 11 a and 12 a of the front and back sheets 11 and 12. 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 rear surface is joined to the upper surface of the lower surface sheet 12 located on the lower surface by fusion means, and the liquid barrier sheet 17 is formed.
A portion separated outward from the inner edge 17d generated by the folding 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), In this way, a joining line 18 and a pocket 19 (see FIG. 5) are formed between the inner portion 17a of the liquid barrier sheet 17 and the topsheet 11. The joining line 18 is preferably curved outward at a portion where the wing portion 14 faces as shown by a reference numeral 18a in order to deepen the pocket 19 at that portion. Each reinforcing layer 2 is integrally formed between the outer extending portion 17b of the liquid barrier sheet 17 and the second outer extending portion 12b of the back sheet 12 constituting each wing portion 14.
7 is interposed. When the reinforcing layer 27 is provided on each wing portion 14 in this manner, each wing portion is easily bent along the inner edge of each reinforcing layer 27, and the folded edge when used later becomes neat. Further, the reinforcing layer 27 may be provided on the outer surface of the back sheet 12. The reinforcing layer 27 can be formed by paper, nonwoven fabric, synthetic resin film, synthetic resin foam sheet, hot melt (including those having foaming), or the like, but has higher rigidity than each of the front and back sheets 11 and 12. A wrinkle-prone one (with relatively strong bending stress), for example, a synthetic resin foam sheet is preferable. It is preferable that such a wing portion 14 is biased toward the front end side of the napkin 10 as shown in FIG. An adhesive 20 is formed on the outer surface of the central area of the back sheet 12 in a belt shape in parallel with the length direction thereof.
An adhesive 21 is applied in a square shape to the outer surface of the central area of the second outer extension 12b of the back sheet 12, and the adhesives 20, 21 are covered with release sheets 22, 23, respectively, to protect them. . In FIG. 4, a string 24 is interposed along the inside of the folded inner edge 17 d of the liquid barrier sheet 17, and at least both ends in the length direction of the liquid barrier sheet 17
It is fixed to 7. 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. The napkin 10 having the above-described structure is prepared by first releasing the release sheet 22 and releasing the adhesive 20.
Then, the central region of the napkin 10 is adhered to the inner surface of the crotch portion 25 (see FIG. 5) of the wearing pants, then the release sheet 23 is peeled off, and the wing portion 14 is folded back to the outer surface of the crotch portion 25 and the adhesive 21 is used. Used by bonding. In addition, when the napkin 10 is fixed to the wearing pants in this way, as shown in FIG.
The inner portion 17a of the flap 15 facing the portion is pulled outward, the inner edge 17d is lifted, and the pocket 19 is opened. Although not shown, the napkin does not have to be configured as in the illustrated embodiment in order to solve only the intended problem of the present invention. For example, the top sheet 11 is formed in the same size and shape as the back sheet 12 having the second outside extension 12b without using the liquid barrier sheet 17, and the second outside extension 12b of the back sheet 12 is formed.
The wing portion 14 may be formed from the surface sheet portion having the same size and shape. 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 stiffened and the wings are bonded to each other. There is no failure to use the napkin without sticking to it and making it impossible to use it, or sticking to the shorts worn out and making it difficult to fix the napkin easily due to insufficient fixation can do.

[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   FIG. 3 is a rear perspective view of the napkin.     FIG. 3   FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 1.     FIG. 4   FIG. 4 is an enlarged cross-sectional view of a napkin according to another embodiment at a site equivalent to FIG. 3.     FIG. 5   FIG. 4 is an enlarged cross-sectional view showing a state in which the napkin shown in FIG. [Explanation of symbols]   11 Surface sheet   12 Back sheet   13 core   14 Wing section   15 flaps   17 liquid barrier sheet   27 Reinforcement layer

Claims (1)

[Claim 1] A liquid-absorbent core is interposed between a liquid-permeable top sheet and a liquid-impermeable back sheet, and both side edges at substantially the center in the length direction of the core. A flap having a wing portion formed from the back sheet portion extending outward from the upper portion and an upper sheet joined 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. In the napkin, a reinforcing layer is provided independently on each of the wing portions.
The inner edge of each of the reinforcing layers is separated from each side edge of the core, and the rigidity of the wing portion provided with the reinforcing layer is reduced by the rigidity of the wing portion when the reinforcing layer is not provided. The napkin according to claim 1, wherein the napkin is higher than the napkin. 2. The napkin according to claim 1, wherein the reinforcing layer is interposed between the back sheet portion and the top sheet. 3. The napkin according to claim 1, wherein the top sheet is a part of the top sheet. 4. The liquid crystal sheet according to claim 1, wherein the top sheet is a liquid barrier sheet separate from the top sheet.
The napkin described in the above.