JP2608380B2 - Sanitary items - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary product which is worn locally at the time of menstruation of a woman.

[0002]

2. Description of the Related Art A so-called sanitary product worn locally by a woman during menstruation usually has a liquid-absorbing capacity inside a bag-like covering made of a woven product or a non-woven fabric made of natural fibers or synthetic resin fibers. A liquid absorber made of excellent compressed cotton or fiber products made of natural or synthetic resin, porous sheet products, or the like is internally provided and basically configured. Current,
A great number of such sanitary products have been proposed and put to practical use.

[0003] Sanitary products must be worn regularly, and once worn, it is preferable to continue wearing them comfortably for as long as possible. In addition, attention is paid to the functional aspect that the ability to absorb the discharged blood is large, and various measures are taken to obtain a comfortable wearing feeling such as preventing reverse leakage.

[0004] As a device that is properly maintained in a state of attachment, a sanitary product (napkin) in which an adhesive layer for sticking to shorts is formed on a part thereof (Japanese Utility Model Laid-Open No. 4-58232).
No. 4,831,231) or a napkin having a projection formed at the center of the surface thereof to prevent the movement of the napkin by using the projection (Japanese Utility Model Application Laid-Open No. 59-19).
No. 6218) and the like.

[0005] In terms of function, the use of a water-absorbing polymer having a large ability to absorb blood (Japanese Patent Laid-Open No. 5-15 / 1993).
No. 4177), a water-repellent band is disposed at an appropriate position in an absorber to prevent reverse leakage (Japanese Patent Application Laid-Open No. 61-31156), and coated with a non-woven fabric having reverse permeability. Examples thereof include those employed as a body. Further, in order to prevent lateral leakage, a napkin is provided with projections for preventing lateral leakage and side gathers on both sides (Japanese Patent Laid-Open No. 4-152946, Japanese Utility Model Application Laid-Open No. H05-152946).
-5118).

As mentioned above, the main products which have been put on the market in recent years are listed. In addition to these, many sanitary products with various ideas have been proposed.

[0007]

By the way, many sanitary products have been proposed in recent years as described above. However, once the sanitary products are attached, their surfaces are in close contact with the skin for at least several hours. Despite the deciding factor of the feeling of wearing, whether or not this close contact is comfortable, there is no suggestion from that aspect, and only the pursuit from the functional aspect has preceded the current situation. It is.

For example, at present, it is very common that a woven product or a non-woven fabric made of a synthetic resin is used as a covering material for covering the absorber. However, such a synthetic resin product has an uncomfortable touch. However, it is not necessarily suitable for long-time wear. In the worst case, it causes skin irritation and often damages the skin.

Therefore, it is conceivable to apply a woven product made from natural fibers which are familiar to the skin as a raw material as the above-mentioned coating.
Cotton products have poor liquid holding power, cannot effectively prevent reverse leakage of blood, and have a problem that the skin becomes sticky as a whole. In addition, wool products have a problem in that they have high water repellency and it is difficult to introduce blood into an internal absorbent.
Silk products, on the other hand, have moderate moisture retention and water repellency, and have very good texture, and are therefore the most suitable material for forming the surface of sanitary products, but they are very expensive Has the disadvantage that

The present invention has been made to solve the above-mentioned problems, and has an appropriate water repellency in spite of its excellent water retention, and has an effect on the skin. An object of the present invention is to provide a sanitary product provided with a coating that is extremely well-adapted and does not cause skin irritation.

[0011]

[0012]

The sanitary product according to claim 1 of the present invention comprises a flexible sheet-like liquid material absorber having flexibility and a covering material covering at least one surface of the absorber. In the sanitary product, the covering is formed of a nonwoven fabric made of silk, and the absorbent body is configured such that a plurality of sheet-shaped unit absorbent bodies having different surface dimensions form ridges upward. The present invention is characterized in that the ridges are laminated and the peaks are covered with the covering.

A sanitary product according to a second aspect of the present invention is a sanitary product comprising a flexible sheet-like liquid material absorber having flexibility and a covering material covering at least one surface of the absorbent material. The above-mentioned cover is constituted by a nonwoven fabric made of silk, and the above-mentioned absorber has a plurality of sheet-like unit absorbers in which through-holes having different dimensions are drilled in the center, and forms a wall around them. It is characterized by being laminated so as to form a concave portion downward, and the concave portion is covered by the covering so as to form a closed space at the lower portion.

A sanitary product according to a third aspect of the present invention is a sanitary product comprising a flexible sheet-like liquid material absorber having flexibility and a covering material covering at least one surface of the absorber. The above-mentioned cover is constituted by a nonwoven fabric made of silk, and the above-mentioned absorber is integrally formed so as to form a wall at the peripheral portion of the surface and to form a recess at the center, and the recess is formed by the cover. , So as to form a closed space at the lower portion.

The sanitary product according to claim 4 of the present invention is the sanitary product according to any one of claims 1 to 3, wherein the nonwoven fabric made of silk is made of a natural fiber and a non-woven fabric that does not impair the feel of silk. One or both of the synthetic fibers are mixed.

[0016]

According to the sanitary products according to the first to third aspects of the present invention, since the covering for covering the inner absorbent is made of a nonwoven fabric made of silk, the water retention that silk originally possesses. In addition to its properties and moderate water repellency, the natural fiber has good compatibility with the skin, as well as the ability to absorb and remove odors and the sterilization performance, making the sanitary products extremely hygienic and comfortable to wear. It will be good and will not cause skin irritation.

In addition, since nonwoven fabrics are used instead of silk woven products, inexpensive materials such as lint and scraps produced by-product in the weaving process of silk fabrics and defective cocoons such as selected cocoons are used. It can be used as a raw material, and it is possible to manufacture an inexpensive sanitary product having an expensive silky feel.

According to the sanitary product according to the first aspect of the present invention, the ridge formed by laminating a plurality of sheet-shaped unit absorbers is formed at the center of the absorber. Closely adheres to the local cleft and reliably absorbs the drained blood.

According to the sanitary product of the second aspect, a wall is formed around the central portion of the absorber formed by laminating a plurality of sheet-shaped unit absorbers, and a concave portion is formed downward. Since the concave portion is covered with the covering to form a closed space below, the space functions as a buffer, and the blood once absorbed by the absorber leaks out of the absorber. Even if it does, it will stay in this space and effectively prevent leakage to the outside.

Further, according to the sanitary product according to the third aspect, the absorbent body is integrally formed so as to form a wall at the peripheral edge of the surface and to form a concave portion at the central portion, and the concave portion is provided with the cover. Is covered so as to form a closed space at the bottom, so that this space acts as a buffer, and even if blood once absorbed by the absorber leaks back from the absorber, this space is And effectively prevent leakage to the outside.

According to the sanitary product of the fourth aspect, even if the raw material of silk is short fiber and it is difficult to produce a non-woven fabric, the silk fiber is short fiber by mixing natural fiber or synthetic fiber. The disadvantage can be compensated for and the nonwoven fabric can be easily manufactured. Further, since the mixing ratio of the natural fibers or the synthetic fibers is suppressed to the extent that the feel of the silk is not impaired, the advantage of the silk is not impaired. In addition, by performing such mixing, it is possible to manufacture a nonwoven fabric at low cost.

Furthermore, since synthetic fibers are materials having excellent heat welding properties such as melting at a relatively low temperature when heated, if synthetic fibers having a low melting point are contained in silk, the heat welding properties will be reduced. It is possible to easily manufacture a nonwoven fabric by utilizing the same. Further, in processing the obtained nonwoven fabric, it is possible to bond the nonwoven fabrics by thermocompression bonding without using an adhesive.

[0023]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of a sanitary product according to the present invention, and FIG.
It is a line sectional view. As shown in these figures, in this embodiment, a napkin is used as a sanitary product. A sanitary napkin 1 has an absorbent body 2 formed of a flexible and flexible sheet-like material for absorbing a liquid material (blood), and a covering body for covering the surface of the absorbent body 2. And 3.

The absorber 2 includes a thick base sheet 21 formed in a vertically long rectangular shape, and the base sheet 21.
And a plurality of sheet-shaped unit absorbers 22 having different surface dimensions, which are disposed in a stacked state on the upper surface. These unit absorbers 22 are sequentially laminated on the base sheet 21 in ascending order of size. As a result, base sheet 2
In this state, a ridge 23 made up of a plurality of unit absorbers 22 is formed on the surface of one. In the present embodiment, the peak 23 is covered with the cover 3.

The base sheet 21 is set to be considerably longer than the lowermost unit absorber 22, and the unit absorber 22
Attachment portions 24 are formed on both sides in the longitudinal direction that protrude from the attachment portions. An adhesive is applied to the surface of the sticking portion 24, and the mounted napkin 1 is fixed to the skin by the adhesive effect of the adhesive, so that the mounted napkin 1 does not shift. Has become.

As the base sheet 21, a sheet body made of a material that blocks liquid permeation is used.
Made of compressed cotton or natural or synthetic resin sponge or pad material with countless fine pores inside,
The bottom surface of which is subjected to a waterproof treatment may be applied. The unit absorber 22 is made of compressed cotton or fiber made of natural or synthetic resin having excellent liquid absorbing ability, a porous product, or the like. In particular, as the unit absorber 22, a unit in which a high-molecular-weight water-absorbing material is installed may be used in order to prevent reverse leakage of the absorbed blood.

In the present invention, the coating 3
Is formed by a silk non-woven fabric. As a raw material of the nonwoven fabric, ordinary silk is used, but sub-silk may be used. As the auxiliary silk, the originally selected cocoons removed as defective in the sericulture process, raw silk waste generated in the refining process and weaving process at the crepe manufacturing factory, etc., and scraps generated in the cutting process of silk woven fabric etc. Such as those that are subject to disposal.

The reason why the nonwoven fabric made of silk is used for the coating 3 is that silk is a natural fiber and has an extremely good touch, and the presence of polar amino acids contained in fibroin constituting silk. Also, the presence of many pores generated by the dehydration operation after the refining process described later makes the moisture absorption / desorption function of the silk excellent, and a very good sensation can be obtained when the napkin 1 is attached. Because.

The production of a nonwoven fabric using silk as a raw material will be briefly described below. First, a refining process is performed in which the silk thread is immersed in a weak alkali soap solution and rinsed, boiled in an alkali solution, or saponified and fermented (saponified kneading). By this treatment, sticky sericin and fats and oils in the fibroin constituting the silk fibers are leached out. Thereafter, a dehydration treatment by drying is performed.

The lump of smelted product obtained in this manner includes:
Dust and pupal debris remain, which is removed by tapping or loosening with a machine with sharp hooks. This is combed and cut to a certain size to obtain a raw material suitable for producing a nonwoven fabric.

The method for producing a nonwoven fabric using the raw material thus obtained is not particularly limited, and the smelted product is immersed in a solution in which a binder is dissolved, and the smelted product is made in the same manner as papermaking, and then heated. It is possible to apply a wet method of crimping, a bonding method of forming a cloth with a card for spinning without using a liquid and then performing emulsion bonding, and a needle punching method of forming a cloth with a card for spinning and then forming a felt shape with a needle punch. is there.

In the present invention, the nonwoven fabric manufactured as described above is first cut slightly larger than the base sheet 21 to form the cover 3. Thereafter, the cover 3 is covered on the crest 23 of the absorber 2 including the unit absorber 22 laminated on the upper portion of the base sheet 21, and the edge of the cover 3 protruding from the base sheet 21 is formed as shown in FIG. As shown in FIG. 1, it is folded back and bonded with an adhesive to obtain a sanitary napkin 1 as shown in FIG.

FIG. 3 is a partially cutaway perspective view showing a second embodiment of the sanitary product according to the present invention, and FIG.
It is a line sectional view. Also in this embodiment, a napkin is mentioned as a sanitary product. In this example, the absorber 2a is formed by laminating a plurality of unit absorbers 22a each having a through hole 22b having a different size at the center. The dimensions of the through holes 22b are set so as to gradually decrease from the upper unit absorber 22a toward the lower side, and the plurality of unit absorbers 22a are disposed on the base sheet 21a at the lowermost position. In the laminated state, a concave portion 25 is formed at the center of the surface.

The surface unit absorber 22a 'laminated on the uppermost part is set to have a longer dimension than that of the lower part.
The both sides in the longitudinal direction are the lower unit absorber 22
It protrudes from a.

The surface of the absorbent body 2a thus constructed is covered with a covering body 3a made of silk non-woven fabric, and the surface of the covering body 3a covering the protruding portion of the surface unit absorbent body 22a '. An adhesive is applied to the napkin 1 to form an adhesive portion 24, and the sanitary napkin 1 as shown in FIG.
a is completed. When the napkin 1a is completed, a closed space 26 closed by the cover 3a is formed in the concave portion 25 formed in the absorber 2a.

The materials of the absorber 2a and the cover 3a constituting the napkin 1a of the second embodiment are the same as those of the napkin 1 of the first embodiment.

FIG. 5 is a partially cutaway perspective view showing a third embodiment of the sanitary product according to the present invention, and FIG. 6 is a sectional view taken along line CC of FIG. Also in this embodiment, a napkin is mentioned as a sanitary product. In this example, the absorber 2b is formed of a compression molded product of natural cotton or synthetic resin cotton. A weir portion (wall portion) 27 swelling upward on the upper outer peripheral edge.
Is provided, and a concave portion 25 is formed in a portion surrounded by the weir portion 27.

The surface of such an absorber 2b is covered with a cover 3b made of silk non-woven fabric, and a napkin 1b as shown in FIG. 5 is completed. This napkin 1
When b is completed, a closed space 26 closed by the cover 3b is formed in the recess 25.

The material of the cover 3b, which is a component of the napkin 1b of the third embodiment, is the same as that of the napkin 1 of the first embodiment.

FIG. 7 is a perspective view showing a fourth embodiment of the sanitary product according to the present invention. In the case of this example, the napkin 1c
A commercially available absorbent sheet is usually used for the absorber constituting the inside, and its outer peripheral surface is covered with a covering 3c made of a silk nonwoven fabric. The material of the cover 3c is the same as that of the first embodiment.

FIG. 8 is a partially cutaway perspective view showing a fifth embodiment of the sanitary product according to the present invention. In the case of the napkin 1d of this embodiment, the napkin 1c of the fourth embodiment shown in FIG. 7 is used as a base, and side wings 31 of the same length as a pair of left and right main bodies formed by flexible bodies are provided on both sides thereof. It is attached. The long side wings 31, which did not exist in the related art, can more effectively prevent lateral leakage.

As described in detail above, in the sanitary napkin according to the present invention, since the covering for covering the inner absorbent body is formed of a nonwoven fabric made of silk, which is a natural fiber,
The napkin feels extremely soft and has excellent moisture absorption and moisture release properties.Since the napkin is effectively utilized, the wearing of the napkin effectively suppresses the stuffiness of the skin and gives a very good fit. It becomes something.

Further, if the above-mentioned sub-silk which is originally subjected to disposal is used as a raw material of the covering, it is extremely inexpensive. Thus, it becomes possible to supply the napkin as the final product at a low cost.

Also, as in the first embodiment, the napkin 1
By forming a peak 23 at the center of the surface, the peak 23 comes into close contact with a local portion, which advantageously increases the blood absorption effect.

On the other hand, as in the second and third embodiments, a concavity 25 is provided in the center of the surface of the napkins 1a and 1b, and the concavities 25 and the covering members 3a and 3b for closing the concavity 25. If the closed space 26 is formed, the closed space 26 functions as a buffer, and blood can be retained in this portion, and the blood holding capacity of the napkins 1a and 1b can be increased. it can.

In the above embodiment, a napkin is described as an example of a sanitary napkin. However, the sanitary napkin of the present invention is not limited to a napkin. It is also applicable to a tampon or the like inserted into the vagina.

Hereinafter, for reference, the test results of the test based on the medical nonwoven fabric test method of the nonwoven fabric used in this example are shown in Table 1, and the test results of the gauze test based on the Japanese Pharmacopoeia are shown. It is shown in Table 2.

[0048]

[Table 1]

[0049]

[Table 2]

In the present invention, natural fibers or synthetic fibers may be mixed in the raw material of the nonwoven fabric made of silk. These natural fibers and synthetic fibers are mixed for the following reasons. That is, as raw materials of the nonwoven fabric of the present invention, selected cocoons removed as defective in the sericulture process as described above, raw silk debris generated in a refining process or a weaving process in a crepe manufacturing factory or the like, and cutting of silk woven fabric. In the case of applying the cut off generated in the process, the length of the fiber may be so short that it is not suitable for producing the nonwoven fabric. This is because long fibers are required as auxiliary materials.

In such a case, ordinary silk fibers may be used as the auxiliary material. However, if ordinary silk fibers are used, one problem of the present invention that provides a silk nonwoven fabric at low cost must be sacrificed. For this reason, in the present invention, one or both of natural fibers and synthetic fibers having a considerable length are added to the raw material as auxiliary materials.

When fibers other than silk are applied to the nonwoven fabric material of the present invention as an auxiliary material as described above, the feel is extremely soft, the skin does not rash even when worn for a long time, and the sterilization performance is improved. This raises a new problem to be solved in that the inherent characteristics of the silk provided with the same are lost.

Therefore, there is a trade-off problem that the non-woven fabric can be easily manufactured without impairing the characteristics of the silk and using the above-mentioned selected cocoons as a raw material. As a solution, the present inventor has prepared various types of nonwoven fabrics having various mixing ratios of silk and natural fibers or synthetic fibers, and manufactured a sanitary product on a trial basis with the nonwoven fabrics.
It was found from test results obtained by performing a fitting test.

That is, selected cocoons and the like are used as a raw material of the nonwoven fabric. As a result, when the silk is all short fibers, at least 10% by weight of long fibers (auxiliary material) is not mixed, and the nonwoven fabric is excellent. Was found to be impossible to manufacture.

On the other hand, a try-on product of the above-mentioned sanitary product was manufactured using a nonwoven fabric having a mixing ratio of the auxiliary material of 10% by weight or more, and as a result of a try-on test performed by several panelists for a predetermined period, the mixing ratio of the auxiliary material was slight. 20% by weight on average although there is variation
If it is below, it turned out that the advantage of the said silk is not spoiled at all, and very favorable touch is obtained. That is, if the mixing ratio of the auxiliary material is 10 to 20% by weight on average, the production of the nonwoven fabric is easy and the obtained nonwoven fabric is silk even if the silk fibers are considerably short fibers. The quality of the is not impaired.

As described above, the present invention has been completed in which one or both of natural fibers and synthetic fibers which do not impair the feel of silk are mixed in a nonwoven fabric made of silk. . In the present invention, the mixing ratio of the auxiliary material is not limited to 10% by weight or more.
Because if silk is a long fiber, the auxiliary material is 10% by weight
The following may be sufficient, and further, it is not necessary to particularly mix an auxiliary material.

In the present invention, the mixing ratio of the auxiliary material is not limited to 20% by weight or less. This is because, depending on the type of the sanitary product, even when the mixing ratio of the auxiliary material is 20% by weight or more, the feeling of silk may not be required so strongly.

Regarding the specific mixing ratio of the auxiliary material, the conditions of the raw silk short fiber, the method of producing the nonwoven fabric,
What is necessary is just to consider the characteristics etc. of each sanitary product, and to set each time from the feeling of the actual product.

As the above-mentioned natural fiber, wool, cotton and the like are applied, and wool is preferable from the viewpoint of feel. Examples of the synthetic fiber include rayon, acetate, nylon, polyester, promix fiber, benzoate, spandex, vinylon, polyclar, acrylic fiber, and polypropylene fiber. Rayon is preferred in terms of softness.

[0060]

As described in detail above, the sanitary product of the present invention comprises a flexible sheet-like liquid material absorber having flexibility,
A sanitary article comprising a covering for covering at least one surface of the absorbent body, wherein the covering comprises a non-woven fabric made of silk.

[0061] Therefore, in addition to the good water retention and moderate water repellency inherently possessed by silk, the familiarity to the skin, which is a characteristic of natural fiber, is sufficiently exhibited, and the sanitary products are extremely worn. It will be nice and convenient.

In addition, since the coated body is not a silk woven product but a nonwoven fabric, inexpensive products such as lint or cut off by-products in the weaving process of the silk fabric and defective cocoons such as selected cocoons. It is possible to use an expensive material as a raw material, and it is possible to make a very expensive inexpensive sanitary product having a silky feel, which is advantageous in putting it on the market.

If the above-mentioned absorber is formed of a plurality of sheet-shaped unit absorbers having different surface dimensions, and the unit absorbers are laminated so as to form a ridge upward, the ridge becomes a local portion. Because it adheres to the cleft, it is effective in improving blood absorption performance.

If a concave portion is formed downward at the center of the surface of the absorber, and the concave portion is covered with the cover to form a closed space at the lower portion,
This space functions as a buffer, and even if blood once absorbed by the absorber leaks back from the absorber, it stays in this space, effectively preventing leakage to the outside. It is convenient.

Furthermore, if one or both of natural fibers and synthetic fibers that do not impair the feel of silk are mixed into a nonwoven fabric made of silk, even if the silk is a short fiber, the production of the nonwoven fabric becomes difficult. Even if difficult, natural fibers or synthetic fibers are mixed to compensate for the shortcomings of silk as short fibers,
A nonwoven fabric can be easily manufactured. Further, since the mixing ratio of the natural fibers or the synthetic fibers is suppressed to the extent that the feel of the silk is not impaired, the advantage of the silk is not impaired. Further, by performing such mixing, a nonwoven fabric can be manufactured at a low cost, which is convenient for supplying a sanitary product having a silky feel to a user.

Also, since synthetic fibers are materials having excellent heat welding properties such as melting at a relatively low temperature when heated, if synthetic fibers having a low melting point are contained in silk, the heat welding properties will be reduced. It is possible to easily produce a nonwoven fabric by utilizing the method, which is convenient in terms of production. Further, in processing the obtained non-woven fabric, the non-woven fabrics can be bonded to each other by thermocompression bonding without using an adhesive, which is also useful on a processed surface.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of a sanitary product according to the present invention.

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

FIG. 3 is a partially cutaway perspective view showing a second embodiment of the sanitary product according to the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a partially cutaway perspective view showing a third embodiment of the sanitary product according to the present invention.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is a perspective view showing a fourth embodiment of the sanitary product according to the present invention.

FIG. 8 is a perspective view showing a fifth embodiment of the sanitary product according to the present invention.

[Explanation of symbols]

 1, 1a, 1b, 1c, 1d Napkin 2, 2a, 2b Absorber 21, 21a Base sheet 22, 22a Unit absorber 23 Crest portion 24 Adhering portion 25 Depressed portion 26 Closed space portion 27 Weir portion (wall portion) 3, 3a, 3b Coated body 31 Side wing

Claims (4)

(57) [Claims] 1. A sanitary product comprising a flexible sheet-like liquid material absorber having flexibility and a covering material covering at least one surface of the absorbent material, wherein the covering material is made of silk. The absorbent body is constituted by a nonwoven fabric, and the plurality of sheet-shaped unit absorbers having different surface dimensions are stacked so as to form a peak upward, and the peak is covered with the coating. A sanitary product characterized by the fact that: 2. A sanitary product comprising a flexible sheet-like liquid material absorber having flexibility and a covering material covering at least one surface of the absorbent material, wherein the covering material is made of silk. The absorbent body is constituted by a nonwoven fabric, and the plurality of sheet-shaped unit absorbent bodies in which through-holes having different dimensions are perforated in the central portion form a wall around the periphery and form a concave portion downward. are stacked, raw Riyo products you characterized in that it is coated to the closed space portion at the bottom is formed the recess by the covering body. 3. A sanitary product comprising a flexible sheet-like liquid absorbent body having flexibility and a covering body covering at least one surface of the absorbent body, wherein the covering body is made of silk. The absorbent body is formed of a nonwoven fabric, and the absorber is integrally formed so as to form a wall at the peripheral edge of the surface and to form a recess at the center, and the recess forms a closed space at the lower portion by the covering. it raw Riyo products it wherein is coated as. 4. A non-woven fabric made of silk, wherein one or both of natural fibers and synthetic fibers are mixed so as not to impair the feel of silk. The sanitary product according to any one of the above.