JPS61222448A - Napkin for menses - 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] This invention relates to a menstrual napkin used during menstruation.

[Conventional technology]

In conventional menstrual napkins, the main constituent material of the menstrual blood absorber is pulverized wood pulp fibers instead of absorbent cotton.

[Problem that the invention seeks to solve]

Wood pulp is cheaper than expensive absorbent cotton, but when it is used for menstrual napkins, it is necessary to crush a dense and hard plate to obtain a cotton-like material, which requires powerful machinery and large quantities of wood. It requires more power and is therefore more expensive.

In addition, the pulp-pulverized fibers have poor diffusibility of the absorbed menstrual blood, and because it partially absorbs the blood, the absorption capacity exceeds the limit, and the entire absorbent body cannot be effectively utilized in many cases.

Furthermore, since pulp-pulverized fibers have fewer fiber entanglements,
The fibers easily slip into each other, lack the ability to retain their shape, and are often crushed by pressure after absorbing menstrual blood, causing them to lose their shape.

is a napkin for menstrual blood in which short cotton fibers are the main constituent material of the menstrual blood absorber.

Another aspect of the present invention is a medical napkin in which the material is a combination of short cotton fibers and a polymeric absorbent material.

Still another aspect of the present invention is a menstrual napkin in which the material is a mixture of short cotton fibers and pulverized wood pulp fibers.

[Effect]

Short silk fibers are twisted and fluffy in a laminated state, with gaps between the fibers, which retain liquid.

In addition, the short silk fibers are combined with a polymeric absorbent material, and the menstrual blood retained between the fibers is sucked and gelled by the strong absorption power of the polymeric absorbent material.

The twisted short silk fibers are mixed with pulverized wood pulp fibers exhibiting a linear shape, so that electric charge reduction properties due to pressurization are obtained compared to the case of only short silk fibers.

〔Example〕

FIG. 1 shows an example of a menstrual napkin according to the present invention,
Short cotton fibers were laminated on an underlay paper 1 made of 100% pulp paper with good air permeability and a width of 160%, and this shortened fiber layer 2 was further interspersed with a polymeric absorbent material such as CMC1 superabsorbent polymer. After layer 3 was formed, both sides were folded inward so that the width was 65%, and the length was cut to 160%.
A liquid egg-permeable leakage preventive material 4 was attached to the folded side, and this was covered with a liquid-permeable nonwoven fabric 5 to obtain a napkin with a total volume of 6y.

Short silk fibers include the short fibers left in cotton seeds.

Cotton waste is the residual fiber after long fibers are collected from cotton, or short fibers derived from the process of cutting long fibers, etc. Conventionally, it was produced during the long fiber cotton manufacturing process and was disposed of by incineration. , the amount is not small, and it should be used effectively.

The cotton waste mentioned above is used after being degreased, bleached, washed, and dried.

In the figure, 6 is absorbent paper, 7 is a cushioning material, and 8 is an adhesive tape for attachment to shorts, and although not shown, there is a layer of release paper on the surface.

FIG. 2 shows an enlarged view of the shortened fiber layer 2 in FIG. 1, and this layer consists only of short silk fibers 9.

FIG. 3 shows the other side of the shortened fiber layer, this layer 2a being a mixture of short silk fibers 9 and pulverized wood pulp fibers 10.

A comparison of the menstrual blood absorption ability of the above-mentioned napkins on each side and conventional napkins is shown below.

Comparative Example 1 The main constituent material (hereinafter simply referred to as material) of the test sample diameter absorber was 65
% x 160%, and was wrapped with a liquid-permeable nonwoven fabric to make the total amount 6y.

Sample C: The material is short fibers made of cotton Sample C: The material is a mixture of cotton short fibers and pulverized wood pulp fibers Sample C: The material is pulverized wood pulp fibers (Sample A,
B is a product of the present invention, sample C is a conventional product) Test method: Immerse in a water tank for 1 minute to completely absorb water, then leave for 1 minute on a 1° mesh wire mesh to measure the absolute absorption amount and absorption capacity (absolute absorption amount). /test sample weight) was determined.

Table 1 Results: Both Samples A and B according to the present invention absorb more in absorption capacity than the conventional product (Sample C).

Comparative Example 2゜Test sample Same test method as Comparative Example 1 A 4% hole was made in the acrylic plate, a 20φ sample liquid guide tube was installed in the hole, and 10ml! A 0.2% Congo Red test solution was poured into the container, and the absorption time was measured.

Results: As shown in Table 2, the product of the present invention is absorbed faster than the conventional product.

Comparative Example 3゜The test sample material was made 65% x 160%, and one was wrapped with liquid-permeable nonwoven fabric and the other was combined with 0.3 y of polymer absorbent material inside, and the total amount of each was 6 y. I did it like that.

Sample D = Short fiber made of cotton Sample E: Made of a combination of short cotton fiber and polymeric absorbent material Sample F: Made of pulverized pulp fiber Sample G: Made of a combination of pulverized pulp fiber and polymeric absorbent material Combined (Samples D and E are products of the present invention, Sample F.

(G is a conventional product) Test method: Drop 10 mA of 0.2% Congo Red test solution into the center of the test sample using a burette, leave it for 1 minute, place a filter paper on it, apply pressure with IK9 for 1 minute, and remove the sample solution on the filter paper. The amount of reverse leakage was calculated from the difference in weight before and after absorption.

Table 3 Results: The combination of polymeric absorbent materials reduces the amount of back leakage during pressurization, increases water retention capacity, and improves the performance of the product of the present invention (short fiber material).

〔effect〕

(1) This invention uses short cotton fibers as the main constituent material (hereinafter simply referred to as main constituent material) of the menstrual blood absorber in menstrual blood napkins, and these short silk fibers are used in a considerable amount during the cotton manufacturing process. Even though it is produced, only a portion of it is used for explosives, and most of it is discarded, but it is used, and the cost is significantly lower than that of crushed wood pulp fiber.

(2) This main constituent material has natural twists and rips unique to cotton, so the laminated state is not dense like wood pulp crushed fibers, but has a fluffy and soft feel, and there are sufficient gaps between the fibers. Because of the excellent absorbency of the fibers themselves, the absorbency is significantly improved compared to that of wood pulp pulverized fibers.

(3) Since this main constituent material is a combination of a short cotton fiber layer and a polymer absorbent material, its water retention capacity for menstrual blood is significantly higher than that of a combination of a pulp pulverized fiber layer and a polymer absorbent material.

(4) Since the main constituent material is a mixture of short silk fibers and pulp-pulverized fibers, the bulkiness and drawbacks of short silk fibers alone are eliminated.

[Brief explanation of drawings]

FIG. 1 is an enlarged vertical cross-sectional view of an embodiment of the menstrual blood napkin according to the present invention, and FIG. 2 and FIG. It is a diagram. 2.2a...Main constituent material, 3...Polymer absorbent material, 9
... Short silk fiber, 10 ... Wood pulp crushed fiber.

Claims (3)

[Claims] (1) A napkin for menstrual blood, characterized in that the main constituent material of the menstrual blood absorber is short cotton fibers. (2) A napkin for menstrual blood, characterized in that the main constituent material of the menstrual blood absorber is a combination of short cotton fibers and a polymeric absorbent material. (3) A napkin for menstrual blood, characterized in that the main constituent material of the menstrual blood absorber is a mixture of short cotton fibers and crushed wood pulp fibers.