JP2924663B2 - Rug and its manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rug suitable for preventing bedsores and a method for producing the same.

[0002]

2. Description of the Related Art Recently, the average life expectancy has been prolonged, and the aging society has been approached. With this, the problem of medical nursing when sick has become noticed. In particular, various problems have occurred in nursing for bedridden patients, one of which is the problem of bedsores.

[0003] Bedsores become bedridden due to various illnesses and injuries, and the weight of the person's skin is in contact with the floor,
Pressure is applied to blood vessels and muscles, capillaries are crushed and blood flow is obstructed, blood flow gradually loosens, finally stops, and if blood flow is interrupted for a long time, the site turns black. It is caused by necrosis and is inevitable when bedridden.

[0004] As a countermeasure against this bedsore, a nursing person has conventionally changed the body direction or laid a rug such as an air mat, a water mat, a sponge cushion or the like.

[0005] However, changing the body orientation imposes a heavy burden on the nursing person, and the air mat and the water mat have problems such as an increase in size and cost, and a sponge cushion prevents bedsores. Effect is insufficient.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rug effective for preventing bedsore and a method of manufacturing the same.

[0007]

Means and Action for Solving the Problems The present inventors have
As a result of intensive studies to achieve the above object, the hydrogel of the water-swelled superabsorbent resin and the addition-curable liquid silicone rubber composition were stirred and mixed to uniformly disperse the hydrogel in the liquid silicone rubber composition. A silicone hydrosol is obtained by sealing the sol with a soft packaging material and then curing the liquid silicone rubber composition to obtain a silicone hydrogel in which the silicone gel is sea and the hydrogel is islands. The rug, which is sealed in a soft packaging material, can follow the load with good deformability, receive the body pressure softly, disperse it appropriately, and have a very high bedsore prevention effect. As the water and silicone gel make up the silicone hydrogel, even if the packaging material is broken, Since the drogels form islands, there is little danger of the contents flowing out, and there is a degree of freedom in the shape, and it is possible to create a rug of any shape. It has been found that the present invention has been accomplished.

Accordingly, the present invention provides a rug comprising a silicone hydrogel obtained by uniformly dispersing a water-swellable hydrogel of a water-absorbent resin in a silicone rubber matrix and sealing it with a soft packaging material. After sealing a silicone hydrosol obtained by uniformly mixing a hydrogel obtained by swelling a water-absorbent resin with water and an addition-curable liquid silicone rubber composition with a soft packaging material, the silicone rubber composition is gelled. A method for producing a rug is provided.

Hereinafter, the present invention will be described in more detail. The rug according to the present invention is, as described above, a silicone hydrogel obtained by uniformly dispersing a hydrogel of a water-swelling superabsorbent resin in a silicone rubber matrix. It is sealed with a material.

The superabsorbent resin that can be used in the present invention is not particularly limited as long as it can substantially absorb water and swell to form a hydrous gel. It is better to absorb water twice or more. Specific examples of such a superabsorbent resin include neutralized starch-acrylic acid graft polymer, saponified acrylate-vinyl acetate copolymer, cross-linked polyvinyl alcohol modified product, and partially neutralized polyacrylate. A crosslinked product, a crosslinked isobutylene-maleic anhydride copolymer and the like can be mentioned, and one of these can be used alone or two or more can be used in combination.

The superabsorbent resin is generally in the form of powder, granule, flake, sheet, film, etc.
The powdery form is preferred for absorbing water and causing swelling, and the average particle size is preferably in the range of 1 to 5000 μm, particularly preferably 5 to 500 μm.

In the present invention, a hydrogel obtained by swelling such a superabsorbent resin with water is uniformly dispersed in a silicone rubber matrix. In this case, the silicone rubber matrix may be an addition-curable liquid silicone rubber. A cured (gelled) composition is preferred. Such an addition-curable liquid silicone rubber composition is a diorganopolysiloxane containing an alkenyl group such as a vinyl group, an organohydrogenpolysiloxane containing a hydrogen atom bonded to a silicon atom, a platinum-based catalyst, If necessary, the composition contains a control agent as a main component.

In this case, the alkenyl group-containing diorganopolysiloxane preferably has at least two alkenyl groups directly bonded to silicon atoms in one molecule, and the position of the alkenyl group is desirably at the terminal. The viscosity at 25 ° C. is 500 cs or more, especially 10 cs.
The range of 00 to 50000 cs is preferred. If the viscosity is too low, separation of the uniformly dispersed silicone hydrosol may occur.

As such an alkenyl group-containing diorganopolysiloxane, those represented by the following formula are particularly preferred.

[0015]

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The organohydrogenpolysiloxane must have at least two hydrogen atoms bonded to a silicon atom in one molecule, and the addition reaction with the diorganopolysiloxane results in a diorganopolysiloxane. It can extend the chain length of the siloxane molecule, reduce the hardness of the cured product, and increase the strength. In addition,
When an organohydrogenpolysiloxane having three or more hydrogen atoms is used, the elasticity of the cured product after gelation can be controlled. The viscosity of the organohydrogenpolysiloxane is not particularly limited, but may be 25%.
It is preferably 300 cs or less at ° C.

As such an organohydrogenpolysiloxane, those represented by the following formula can be used.

[0018]

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The amount of the organohydrogenpolysiloxane is 0.5 to 5.0 equivalents, preferably 0.8 to 3.0 equivalents, per alkenyl group contained in the diorganopolysiloxane. It is an amount that is in the range.

The platinum-based catalyst is a catalyst for the reaction between the diorganopolysiloxane and the organohydrogenpolysiloxane. Examples thereof include chloroplatinic acid, alcohol-modified chloroplatinic acid, chloroplatinic acid and olefins, aldehydes, and vinylsiloxanes. Compounds usually used in addition-curable silicone compositions, such as complexes with, and platinum alone can be used, and the compounding amount is a catalytic amount. Specifically, as a platinum metal, diorganopolysiloxane and organohydrogen are used. 1 to 1000 based on the total amount of genpolysiloxane
It is preferably in the range of ppm.

The control agent is a component for adjusting the gel time from the viewpoint of workability, and examples thereof include acetylene alcohol and methylvinyltetracyclosiloxane. The compounding amount of the control agent is preferably in the range of 0 to 2 parts, particularly 0.01 to 1 part, based on the total amount of diorganopolysiloxane and organohydrogenpolysiloxane.

The addition-curable liquid silicone rubber composition according to the present invention may contain, in addition to the above components, a filler such as fumed silica or wet silica for adjusting strength, viscosity and the like.

The rug of the present invention incorporates a silicone hydrogel in which the hydrogel of the superabsorbent resin is uniformly dispersed in a silicone rubber matrix. The rubber composition and the hydrogel of the superabsorbent resin swollen with water are mixed with stirring to prepare a silicone hydrosol.

In this case, the silicone rubber matrix is desirably mixed so as to form a so-called sea-island structure in which the water-absorbent resin hydrogel (water) forms an island. For that purpose, it is preferable to mix 1 to 500 parts, especially 50 to 250 parts, of the hydrogel of the superabsorbent resin with respect to 100 parts (parts by weight, hereinafter the same) of the liquid silicone rubber composition. Here, the hydrogel contains water, and the amount of the water is such that the water content in the final silicone hydrogel is 1 to 80% by weight, particularly 30 to 70% by weight. For this reason, it is preferable to use a hydrogel obtained by adding water to the superabsorbent resin and swelling so as to achieve such a water content.

The method of mixing the silicone rubber composition and the hydrogel of the superabsorbent resin is as follows: a homogenizer,
An ordinary stirrer such as agitator can be used.

The silicone hydrosol solution obtained by stirring in this manner is sealed with a soft packaging material, and then the sol is gelled to obtain the rug of the present invention.

In this case, the shape and size of the package, the filling amount of the sol, and the like can be appropriately selected depending on the application. For example, a rectangular mat shape or a donut shape for a rug of a hip can be used. It can be. Also,
For example, it is also possible to make the shape curved so as to make the air flow better by making the surface uneven, thereby preventing sweat. In this case, the sol molded into a predetermined shape may be sealed with a packaging material, the gel sealed with a packaging material may be molded into a predetermined shape, and further cured in a mold having a predetermined shape at the time of curing. You may do so.

The material of the packaging material may be a soft material such as plastic or rubber which can follow the load of the human body with good deformability. For example, the plastic may be polyethylene, polypropylene, polystyrene, polyester (polyethylene terephthalate, Polybutylene terephthalate, polyethylene naphthalate, etc.), polyamide, soft polyvinyl chloride, polyethylene-vinyl acetate copolymer, and the like. Examples of the rubber include natural rubber, isoprene rubber, butyl rubber, nitrile rubber, and ethylene-propylene rubber. (EPR, EPDM) and the like, and it is also effective to reinforce these plastics, rubbers, and the like with cloth, paper, nonwoven fabric, or the like. Although the thickness of the packaging material can be appropriately selected, the thickness is preferably in the range of 100 μm to 1 mm from the viewpoint of following the body pressure as described above.

Next, the liquid silicone rubber composition of the matrix is cured to convert the silicone hydrosol into a silicone hydrogel, which can be given a desired shape by imparting shape retention.

In this case, the curing can be carried out by leaving at room temperature for 4 to 16 hours, or by heating at a temperature of 40 to 80 ° C. for 10 minutes to 1 hour.

The rug of the present invention thus obtained is
Since it has an excellent function of appropriately dispersing body pressure and can be formed into an arbitrary shape, it is particularly useful as a bed sores prevention device for bedridden persons. In addition, it is inexpensive because water is used, and even if the bag breaks, the silicone gel is sea and the island is hydrogel (water), and the water is absorbed by the highly water-absorbent resin. There is very little risk of escaping.

[0032]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following examples.

Example: Both ends of the molecular chain were blocked with a dimethylvinyl group at a viscosity of 5,000 cs and a vinyl group content of 0.1.
008 mol / 100 g of dimethylpolysiloxane 1
00 parts by weight, ² parts by weight of fumed silica having a specific surface area of 300 m ² / g (surface-treated with trimethylchlorosilane), 0.2 part by weight of a 1% isopropyl alcohol solution of chloroplatinic acid, 0.05 part by weight of acetylene alcohol Department,
Further, 2.1 parts by weight of dimethylpolysiloxane having a viscosity of 3 cs, both ends of which are blocked with a dimethylhydrogen group, and 0.6 part by weight of methylhydrogenpolysiloxane having a viscosity of 100 cs having 30 mol% of methyl hydrogen siloxane units are added. The mixture was stirred and mixed with a homogenizer to obtain a liquid silicone rubber composition.

Next, 70 parts by weight of hydrogel obtained by preliminarily absorbing and swelling 1 part by weight of super water absorbent resin powder SP-510 (manufactured by Sumitomo Chemical Co., Ltd., product number) having a particle size of about 10 μm in 100 parts by weight of water. Was added to the above liquid silicone rubber composition, and similarly stirred and mixed with a homogenizer to obtain a silicone hydrosol solution.

On the other hand, the polybutylene terephthalate 0.1.
400 mm × 400 mm × 40 1 mm sheet with one side reinforced with polyester knit fabric
mm bags were made.

The above silicone hydrosol solution was poured into the bag, the inlet was heat-sealed and hermetically sealed, and allowed to stand at room temperature for 4 hours to be gelled to prepare a bedsore preventing rug.

FIG. 1 shows a cross section of the prepared bedsore prevention rug. In this figure, a bedsore preventing rug 1 has a structure in which a silicone hydrogel 2 is heat-sealed 3 and sealed in a packaging material 4.

[0038]

The rug of the present invention has an excellent function of appropriately dispersing body pressure and can be formed into an arbitrary shape, so that it is particularly useful as a bedsore prevention tool for bedridden persons.

According to the method of manufacturing a rug of the present invention,
Such a gel built-in rug can be efficiently and reliably manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a bedsore preventing rug obtained in an example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rug 2 Silicone hydrogel 3 Heat fusion 4 Packaging material

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A47C 27/00 A61G 7/05

Claims (4)

(57) [Claims] 1. A rug, wherein a silicone hydrogel obtained by uniformly dispersing a hydrogel of a superabsorbent resin swollen in water in a silicone rubber matrix is sealed with a soft packaging material. 2. The water content of the silicone hydrogel is from 1 to 8.
The rug according to claim 1, which is 0% by weight. 3. The rug according to claim 1, which is for preventing bedsores. 4. A silicone hydrosol obtained by uniformly mixing a hydrogel obtained by swelling a superabsorbent resin with water and an addition-curable liquid silicone rubber composition is sealed with a soft packaging material, and then the silicone rubber composition is cured. A method for producing a rug, wherein the rug is gelled.