JPH0631722U - Sanitary napkin - Google Patents

Abstract

(57) [Summary] [Purpose] An annular ridge is provided on the absorber to prevent menstrual blood leakage. [Structure] Absorbent body 2 of a sanitary napkin contains 20 to 90% by weight of thermoplastic synthetic fiber, and has an annular raised portion 13 on its skin contacting surface 12 side. Surface 1
One side is depressed toward the ridge, and the inside surrounded by the ridge 13 is a recess 14 capable of holding menstrual blood. The sanitary napkin is used by pressing the annular raised portion 13 around the vaginal opening.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a sanitary napkin.

[0002]

[Prior art]

 Conventionally, there has been a technique for preventing leakage of menstrual blood by providing an absorbent body of a sanitary napkin with a cushioning property to improve the adhesion around the vaginal opening. For example, in the napkin disclosed in Japanese Utility Model Laid-Open No. 58-160032, the absorbent body is made up of absorbent paper, and the crepe is applied only to the central area in the width direction of the absorbent paper, so that this central area is provided more than other areas. It is formed in a thick layer to give the napkin cushioning properties and to improve the adhesion to the vaginal circumference.

[0003]

[Problems to be solved by the device]

 In the above-mentioned known technique, since the absorbent paper that has become wet due to menstrual blood loses its cushioning property, there is a problem that the adherence of the worn napkin deteriorates with time and menstrual blood easily leaks. Further, according to this technique, the absorbent paper with the crepe has a larger surface area and volume than the absorbent paper without the crepe, and it is possible to quickly absorb and retain a large amount of menstrual blood. However, when a large amount of menstrual blood is excreted at one time, but the absorption rate is not so fast as to match it, there is a problem that menstrual blood tends to leak.

Therefore, in the present invention, the absorbent body contains the thermoplastic synthetic fiber and the skin contact surface side thereof is bulged in an annular shape, and the absorbent body exhibits particularly excellent cushioning property in the bulged portion even in a wet state. Therefore, it is an object to solve the above-mentioned problems of the prior art.

[0005]

[Means for Solving the Problems]

 The points that this device uses as means for solving the above problems are as follows.

This invention is premised on a sanitary napkin having an absorbent body therein, in which the absorbent body contains 20 to 90% by weight of thermoplastic synthetic fiber. A feature of the present invention is that the central area between the two edges on the skin contact surface side has an annular ridge that is long in the front-rear direction, and the non-skin contact surface side of the ridge is recessed in the ridge direction. is there.

[0007]

[Action]

 With the sanitary napkin configured in this way, when the annular ridge of the absorbent body is pressed against the ostium of the vagina and used, menstrual blood can be temporarily retained inside the ridge, so that it is excreted at once. Even if the amount of menstrual blood is large, menstrual blood does not leak beyond the annular ridge. The absorbent body contains thermoplastic synthetic fibers, and its elastic modulus does not decrease even in a wet state.Since the bumps that are a part of such absorbent body are recessed on the non-skin contact surface side, the recesses are deformed. It is especially easy to elastically deform as a margin, and it adheres well to the vaginal opening.

[0008]

【Example】

 Details of the sanitary napkin according to the present invention will be described below with reference to the accompanying drawings.

1 and 2 are a partially cutaway perspective view of the sanitary napkin 1 and a sectional view taken along the line AA. The napkin 1 includes a vertically long absorbent body 2, a liquid-impervious sheet 3 that covers the non-skin contact surface 11 side of the absorbent body 2, and both side edges of the skin contact surface 12 side. It is composed of a liquid-permeable topsheet 4 that covers the body 2 and the liquid-impermeable sheet 3. In the surface sheet 4, both longitudinal end portions 5 extending from the absorbent body 2 are heat-sealed, and the widthwise both side edge portions 6 are overlapped with each other on the non-skin contact surface side and bonded with an adhesive 7. There is.

FIG. 3 is a perspective view of the absorbent body 2 with the skin contact surface 12 facing upward. The absorbent body 2 has an annular ridge 13 which is long in the longitudinal direction at the center in the width direction on the skin contact surface 12 side, and the inside of the ridge 13 is a recess 14. A cutting line BB for showing a cross section in the thickness direction of the raised portion 13 is located at the same position as the cutting line AA in FIG. 1, and its cross section is as shown in FIG. As is clear from FIG. 2, the absorbent body 2 has a uniform thickness, and the non-skin contact surface 11 side of the raised portion 13 is recessed in the raised direction to form an annular groove portion 15.

The absorbent body 2 having such a shape is composed of 20 to 90% by weight of thermoplastic synthetic fibers, 80 to 10% by weight of hydrophilic natural fibers such as pulp and rayon fibers and regenerated fibers, and, if necessary, both of these fibers. 5 to 50% by weight of the total amount of the super absorbent polymer is used as a raw material. It is preferable that these fibers and superabsorbent polymer are uniformly mixed and used, but it is also possible to form each of them into a layer or to use only the superabsorbent polymer in a layer with respect to the fiber mixture. For example, the polymer can be dispersed on the surface of the fiber layer, or a polymer dispersion layer can be provided between the fiber layers. For thermoplastic synthetic fibers, in addition to polyolefin-based fibers such as polyethylene, polypropylene, nylon and polyester, polyamide-based and polyester-based fibers, heat-crimpable composite fibers composed of these fibers are crimped and used. If necessary, the fibers can be used after being hydrophilized. These fibers preferably have a length of 5 to 50 mm and a wire diameter of 2 to 20 d.

In order to obtain the shape of the absorbent body 2, for example, the fiber mixture is evenly dispersed on a mesh screen having a concave shape corresponding to the raised portion 13, while a vacuum suction force is applied from below the screen. Is applied so that the fiber mixture closely follows the shape of the recess and the required density is achieved. Further, by performing the spraying at the softening temperature of the thermoplastic synthetic fiber, the fiber can be bent or crimped to be bulky, and the absorbent body 2 having good cushioning property can be obtained. The super absorbent polymer may be sprayed at an appropriate stage of this process.

The sanitary napkin 1 having the absorbent body 2 configured in this manner has a large annular protrusion 13 and is pressed against the vaginal ostium so that a large amount of menstrual blood is discharged at one time. Even if it is excreted, the menstrual blood can be received and held in the central recess 14, and even if the absorbent body 2 cannot absorb a large amount of menstrual blood promptly, menstrual blood leakage occurs. There is no. Since the absorbent body 2 contains the thermoplastic synthetic fiber, the elastic modulus is not significantly reduced even in a wet state, and the raised portion 13 has a groove 15 on the non-skin contact surface 11 side, which is a groove 15 on the skin. When pressed, it deforms particularly supplely.

In the sanitary napkin 1, a non-woven fabric or a perforated plastic film can be used for the top sheet 4, and a plastic film can be used for the back sheet 3.

[0015]

[Effect of device]

 In this sanitary napkin, since the absorbent body contains the thermoplastic synthetic fiber, the elastic modulus does not decrease even when wet, and it has cushioning properties, and the annular ridge is dented on the non-skin contact surface side and deforms particularly supplely. Good adhesion around the vaginal opening. In addition, since menstrual blood can be retained in the concave portion inside the raised portion, menstrual blood does not leak even if a large amount of menstrual blood is excreted at one time.

[Brief description of drawings]

FIG. 1 is a perspective view of a sanitary napkin according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a perspective view of an absorber.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Absorber 11 Non-skin contact surface 12 Skin contact surface 13 Annular ridge

Claims (1)

[Scope of utility model registration request] 1. A sanitary napkin having an absorbent body inside, wherein the absorbent body contains 20 to 90% by weight of a thermoplastic synthetic fiber, and a central area between both edges on the skin contacting surface side in the longitudinal direction. The napkin has a long annular ridge, and the non-skin contact surface side of the ridge is recessed in the ridge direction.