JPS61170461A - Absorbing body of tampon - 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 [Field of Industrial Application] The present invention relates to an absorbent body for sanitary tampons, and more particularly to a tampon absorbent body that reduces the number of fibers shed into the vagina during or after use.

[Conventional technology and problems]

The absorbent material of conventional sanitary tampons generally has a basis weight of 300~
A method in which a tightening piece such as a fibrous web of about 1000 g/nf is compressed as it is or folded in the diametrical and longitudinal directions, or a thin fibrous web with a basis weight of about 40 g/rrl is spirally shaped and compressed in the diametrical direction. Manufactured by etc. However, the absorbent material of such tampons generally contains large amounts of microfibers (fiber waste) and short fibers of less than 20m5+, and when the tampon is removed after use, these fibers fall off and remain in the vagina. There were drawbacks. More specifically, due to the contact between the tampon inserted into the vagina, which swells by absorbing menstrual blood, and the vaginal wall, and the frictional resistance during removal, some of the fibers that make up the absorbent body of the tampon, especially the outer circumferential surface of the tampon, are damaged. The drawback was that some of the constituent fibers fell off and remained in the vagina.

[Means for solving problems]

The present inventors have completed the present invention as a result of intensive research to solve the above-mentioned problems.

That is, the present invention provides a tampon absorbent body characterized by comprising fibers in which 20% by weight or less of fibers having a length of less than 20+w− and 70% by weight or more of fibers having a length of 20 to 90−. It is.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a front view showing one embodiment of a tampon according to the present invention, in which the fibers constituting the absorbent body 1 have a fiber length of 20 m.
20% by weight or less of fibers less than m, fiber length 20-90m
It is blended so that the fiber content of m is 70% by weight or more.

For example, as shown in FIG. 2, the tampon absorbent body of the present invention is made by laminating two rectangular fiber sheets 4 in a cross shape and attaching a string 3 to the central part 5. However, after protruding to form the rear end 2, it is compressed and molded as shown in FIG.

Using the method described above, absorbers were experimentally produced under the following conditions by varying the type and mixing ratio of fibers, and the following measurements were taken: (1) the amount of fallen fibers, (2) the absorption rate, and (2) the amount of absorption.

(1) Absorber prototype conditions Size: Diameter 11mm Length 50IIIm Weight: 2.
2g (2) Measurement method Ministry of Health and Welfare Notification No. 303 dated August 10, 1970, 1972
Conforms to the menstrual treatment tampon standards revised by the Ministry of Health and Welfare Notification No. 251 dated September 21, 2019. However, for items (■) and (■), horse defibrinated blood was used in order to evaluate the liquid with physical properties as close as possible to menstrual blood.

The results are shown in Table 1 (inventive examples) and Table 2 (comparative examples).

As is clear from Tables 1 and 2, the selection of fibers constituting the absorbent body is important in order to obtain a tampon that reduces shedding material and also has an excellent absorption rate. If the fibers with a fiber length of less than 20 mm exceed 20% by weight, the amount of fallen substances will be extremely large, and if the fibers with a fiber length of 20 to 90 s+m are less than 70% by weight and the proportion of fibers of 90a+- or higher is high (see Table 2). !lh9.10.11), the absorption rate becomes slow. Absorption speed is important for tampons because if the absorption speed is slow, menstrual blood will not be absorbed easily and may leak through the sides of the absorbent body. In addition, Tables 1 and 2 also show the measured values of the amount of absorption, and there was no significant difference between the inventive example and the comparative example in terms of the amount of absorption, and overall values that were satisfactory for a tampon were obtained. Ta.

In order to obtain the tampon absorbent body of the present invention, it is important that the fiber composition of the fibrous web or fibrous sheet to be compression molded is in the above-mentioned ratio as described above. Regardless of the composition, it would be inconvenient if the fibers were damaged or cut and shortened when producing a fibrous web or fibrous sheet, so careful consideration should be given to these production methods. Should.

Next, an example of a means for producing a fiber sheet material suitable for the absorbent body of the tampon of the present invention will be described.

Such a fibrous sheet-like product can be obtained, for example, by a method as shown in FIG. That is, a water-absorbing fibrous web 6 made of rayon, absorbent cotton, or a mixture thereof is produced using a spinning card, garnet, or other equipment, and a liquid is applied to this fibrous web 6 from the direction of the arrow 7 shown in FIG. After spraying, a fiber sheet-like material 9 is obtained by drying with a drying device 8. Note that lO is a belt. The liquid used here is generally water,
Since the purpose of the present invention is to reduce shedding fibers,
It is better for the fibers of the fiber web to be entangled with each other, and it is better to wash away fine fibers (fiber waste) such as damaged fibers contained in the fiber web, so the liquid injection pressure is 10 kg. /cd or more is desirable. Further, the more times the liquid is ejected, the more effective it is.

In addition, as another method for producing a fibrous sheet-like product, as shown in FIG.
An example of this method is to immerse the material in a water tank 11 containing water, press and wash it, and then dry it appropriately. In this method as well, fine fibers can be removed by washing many times, and the absorbent material for the tampon of the present invention having the specific fiber composition as described above can be obtained. It is easier to handle the web if it is passed between rolls or lightly needle-bunched beforehand.

Furthermore, if the fiber diameter of the fibers used in the tampon absorbent body of the present invention is the same as that of fibers generally used in tampon absorbent bodies, that is, in the range of 1 to 8 deniers, it will not affect the amount of shed fibers. .

〔Effect of the invention〕

As mentioned above, the absorbent body of the tampon of the present invention is characterized by the fiber length of the fibers that make up the absorbent body, and since there are few microfibers (fiber waste) and fibers with a fiber length of less than 20 Il 111, it is possible to avoid It has the advantage that fewer fibers fall out.

It goes without saying that the present invention also includes a tampon in which the absorbent body of the present invention is loaded into a so-called applicator (insertion tool).

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of a tampon according to the present invention;
FIG. 2 is a perspective view showing the state during compression molding of the fibrous sheet-like product according to the present invention, and FIGS. 3 and 4 are means for producing the fibrous sheet-like product used in the tampon absorbent body of the present invention. FIG. 1: Absorbent body 2: Back end 3: Retrieval string 4.9: Fiber sheet-like material 5: Center part 6: Fiber web 7: Arrow indicating the direction of liquid injection 8: Drying device 10: Belt 11: Water tank 12: Water Figure 1 1=-1-1IIJ Figure 2

Claims (1)

[Claims] 1. Fibers with a length of less than 20 mm are 20% by weight or less, length 2
An absorbent body for a tampon, characterized in that the absorbent body is made of fibers in which 70% by weight or more of fibers have a diameter of 0 to 90 mm.