JPS61191359A - Sanitary napkin - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a sanitary napkin, which has a thin form that significantly improves fluid retention and prevents leakage of menstrual blood. It is.

Conventional technology Conventional sanitary napkins consist of an absorbent layer made of a crushed pulp layer, tissue paper, etc., a polymer absorbent layer, a moisture-proof layer, etc. Menstrual blood absorbed by the absorbent layer is concentrated into the polymer absorbent layer and turned into a gel. [−
1. A method of fixing is used to prevent backflow.

Pulverized pulp has excellent absorbency and has the advantage of rapidly absorbing menstrual blood through capillary absorption by cellulose fibers, keeping the side that comes into contact with the human body dry, but this absorption is extremely limited. Since the napkin is applied in a dotted manner within the same area, the entire surface of the sanitary napkin is not effectively utilized as an absorber for menstrual blood, and menstrual blood concentrates only in a part of the polymer absorbent layer, resulting in dermal formation. It exceeds its capacity, and menstrual blood accumulates in a part of the absorbent layer, and when external pressure is applied, the menstrual blood flows back from the absorbent surface, or the accumulated menstrual blood presses on the leak-proof layer and penetrates. It was easy to cause accidents such as putting it away.

Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems. , the advantage of pulverized pulp that can be kept in a dry state *
By dispersing menstrual blood over the entire surface of the sanitary napkin, the menstrual blood is dispersed without concentrating only on a part of the polymer absorbent layer, and the gelling ability of the entire surface of the polymer absorbent layer is fully utilized. This prevents menstrual blood from accumulating in a portion of the absorbent layer, thereby preventing backflow of menstrual blood from the absorbing surface and accidents of menstrual blood permeating through the leak-proof layer.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an absorbent layer having at least a pulverized pulp layer, a polymer absorbent layer, a leak-proof layer, etc. formed into a sheet shape. The absorbent diffuser is formed by embossing a large number of concave portions at appropriate intervals on absorbent cotton and is positioned closer to the human body contact side than the polymer absorbent layer.

Function Since the present invention is configured as described above, the menstrual blood that intermittently flows out from the human body is first absorbed in the absorbent layer, and then a large number of four parts are embossed into a sheet of absorbent cotton. It is absorbed into the polymer absorption layer through absorbing diffusers provided at appropriate intervals, and is fixed by delta. The pulverized pulp that makes up the absorbent layer has excellent absorbency, and has the advantage of rapidly absorbing menstrual blood through capillary absorption by cellulose fibers, keeping the side that comes into contact with the human body in a dry state. This absorption occurs in a point-like manner within an extremely limited area of the menstrual blood that comes into contact with it, and causes the menstrual blood to move in a convoluted manner in the thickness direction.
Before contacting the polymeric absorption layer, menstrual blood comes into contact with an absorbing/diffusing material with strong absorption/diffusion properties, and after being diffused over a wide area, it comes into contact with the polymeric absorption layer and is absorbed. can be used effectively. The absorbing diffuser may be located closer to the human body contact side than the polymer absorbing layer, and even if it is in contact with the polymer absorbing layer, the absorbing layer may not be located in a space between the polymer absorbing layer and the absorbing layer. It is sufficient if the menstrual blood can be guided to the polymer absorption layer in a diffused state without being concentrated in one part.

EXAMPLE Below, one example of the present invention will be explained with reference to the drawings. (1)
is a moisture-proof layer, which is made of a material formed by laminating the surface of a non-woven fabric with a polyethylene sheet, and is molded with 7 lunges (3) protruding from the opening edge of the storage compartment (2), which has a U-shaped cross section, and has a planar shape. , both ends in the length direction bulge out in an arc shape, and arc-shaped recesses (4) are formed from both ends on both sides of the central part. The opening of the storage part (2) of the leak-proof layer (1) is covered with a surface layer (5) formed of a nonwoven fabric made of polypropylene fibers and polyethylene fibers by welding and fixing it to the surface of the 7 rank (3). . Absorbent paper (7) made of pulverized pulp is placed on the inner surface of this surface layer (5) with a tie layer (6) made of quilted cotton interposed therebetween, so that there is a space between the surface layer (5) and the absorbent paper (7). A tether layer (6) made of quilted cotton prevents the formation of a patch and interruption of menstrual blood flow. In addition, a relatively thick pulverized pulp layer (8) is placed on the inner surface of the absorption #(7), and this pulverized pulp layer (8)
, the absorbent paper (7), the tie layer (6), and the surface layer (5) form an absorbent layer (10), and this absorbent layer (10)
A polymer absorbent layer (12) is placed on the inner surface of the absorbent cotton sheet through an absorbent diffuser (11) in which a large number of recesses (9) are embossed at appropriate intervals. Polymer absorption 1tlF fil / 19
)/r%1 pL g t-kai fr Hh m M
/ 1 1 lecture (h) Also, from the tie layer (6) to the polymer absorption layer (12), a plurality of embossments (13) of a certain length are formed at a certain interval. Each embossment (13) is applied so as not to reach the outer peripheral edge of the material forming the embossment (13).

In the structure as described above, menstrual blood that intermittently flows out from the human body is first absorbed by the absorbent layer (10) and then absorbed by the absorbent paper (7) via the tie layer (6). ,
It is led to a pulverized pulp layer (8). The crushed pulp layer (8) constituting the absorbent layer (10) has excellent absorbency and rapidly absorbs menstrual blood through capillary absorption by cellulose fibers. It has the advantage of keeping the side that comes into contact with the human body, such as (7), in a saran state, but this absorption only absorbs menstrual blood that comes into contact with it through the absorbent paper (7) in an extremely limited range. Do it in dots to move the menstrual blood in dots in the thickness direction. This menstrual blood is absorbed by the polymer absorption layer (
12) Before contacting the absorbent cotton sheet,
It comes into contact with an absorbing/diffusing body (11) with a strong absorption/diffusion property in which a large number of four parts (9) are provided at appropriate intervals by embossing, is diffused over a wide area, and then comes into contact with and absorbed by the polymer absorbing layer (12). Therefore, the entire surface of the polymer absorption layer (12) can be effectively utilized.

By providing a large number of four parts (9) at appropriate intervals on this sheet-shaped absorbent cotton by embossing, in addition to the strong absorbency that absorbent cotton does not have before, the W-degree The high recess (9) disperses menstrual blood in the surface direction within the mouth (9).

Since the absorbent diffuser (11) is formed by providing a large number of these four parts (9) at appropriate intervals on the absorbent cotton sheet, the menstrual blood that comes into contact with a part of the absorbent diffuser (11) can be spread over a wide area. It becomes something that spreads. By using this absorbent diffuser (11) with strong absorbing and diffusing properties, the entire surface of the polymer absorbing layer (12) can be effectively used, and part of the menstrual blood is concentrated into the crushed pulp layer (8). No stagnation occurs.

Further, the shape of the four parts (9) formed by embossing on the absorbent cotton sheet formed in a sheet shape can be selected from any shape, but in one embodiment, as shown in FIG. By increasing the area of the fourth part (9), it is possible to increase the diffusion rate of menstrual blood. In another embodiment, the recesses (9) are formed in a dotted manner as shown in FIG. 4, and in another embodiment, groove-shaped recesses (9) are formed at appropriate intervals as shown in FIG. By providing a large number of these, an absorbing diffuser is formed.

Further, the absorption diffuser (11) has a polymer absorption layer (12).
) as long as it is located closer to the human body contact side than the polymer absorbing layer (12), as shown in the drawing, it may be in contact with the polymer absorbing layer (12), or in other different embodiments, the polymer absorbing layer (12)
The absorbent layer (10) may be located at a distance from the polymer absorbent layer (12) as long as the menstrual blood can be guided to the polymer absorbent layer (12) in a diffused state without being concentrated in one part.

Further, from the tie layer (6) to the polymer absorption layer (12), a plurality of embossments (13) of a certain length are formed at certain intervals. By forming this emboss (13), the density of the part where the emboss (13) is formed becomes higher than other parts, so the absorption speed of menstrual blood becomes faster and menstrual blood flows along the emboss (13). Therefore, within the absorbent layer (10), menstrual blood flows not only in the thickness direction but also in the length direction, and the dispersion of menstrual blood can be maintained. In addition, since menstrual blood flows even if it follows the emboss (13), the emboss (13) extends to the outer peripheral edge of the emboss (13) forming material.
) is undesirable because menstrual blood will leak from this outer periphery, so the embossment (13) is designed so that it does not reach the outer periphery of the material forming the embossment (13).

In addition, the moisture-proof layer (1) is formed by providing a storage part (2) with a U-shaped cross section, and by storing the material constituting the sanitary napkin in this storage part (2), it is possible to prevent menstrual blood from leaking from the side. It is possible to prevent leakage from. In addition, the planar shape of the storage part (2) of the moisture-proof layer (1) is divided into four arc-shaped parts (4) in which both ends in the length direction bulge out in an arc shape, and both sides of the central part are continuous from both ends.
If so, it will conform to the shape of the human groin area, provide a comfortable wearing experience, and will not cause any slippage while being worn, helping to prevent leakage of menstrual blood.

Effects of the Invention Since the present invention is configured as described above, the pulverizer has excellent absorbency and can rapidly absorb menstrual blood through capillary absorption by cellulose fibers, keeping the side that comes into contact with the human body dry. While taking advantage of the advantages of pulp,
By dispersing menstrual blood over the entire surface of the sanitary napkin, the menstrual blood is dispersed without concentrating only on a part of the polymer absorbent layer, and by fully utilizing the delifying ability of the entire surface of the polymer absorbent layer, absorption is increased. Since menstrual blood is prevented from accumulating in a part of the layer, backflow from the absorbing surface of menstrual blood or permeation from the leak-proof layer will not occur.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view, Fig. 2 is a plan view, Fig. 3 is a cross-sectional view, and Figs. 4 and 5 show absorbers with different four-part shapes. FIG. 3 is a plan view showing an example of a diffuser. (1)・・・・・・・・・Leakage prevention layer (8)・・・・Crushed pulp layer (10)・・・・Absorption layer (11)・・・・Absorption Diffuser (12)...Polymer absorption layer 1 Figure 12

Claims (1)

[Claims] In the case of an absorbent layer having at least a pulverized pulp layer, a polymer absorbent layer, a leakage prevention layer, etc., an absorbent diffuser with a large number of recesses formed at appropriate intervals by embossing on a sheet of absorbent cotton is used. A sanitary napkin characterized by being located closer to the human body contact side than the molecular absorption layer.