JP2004083876A - Porous molded product of silicone rubber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a porous molded product of a silicone rubber, capable of being utilized as an artificial mamma, another skin-analogous molded product, the other medical part for the human body, such as a mask, a bandage, and a cover, and a filter or the like. <P>SOLUTION: This porous molded product is obtained by uniformly mixing a powdery material of a water-soluble material and a liquid material of a water-soluble organic material and further uniformly mixing the materials with a room-temperature curable silicone rubber to which a curing agent is added, so as to form a cured molded material, then soaking the cured molded material in water to make the water-soluble material and the water-soluble organic material flow out, and further drying the soaked material to form the open-cell porous product. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a silicone rubber porous molded article that can be used for artificial breasts, other artificial skin-applied products, medical parts for human bodies such as masks, bandages, covers, filters, and the like.
[0002]
[Prior art]
Conventionally, among room temperature vulcanization type silicone rubbers (hereinafter, referred to as RTV silicone rubbers), foaming type ones cannot accurately form a fixed volume cast-cured mold, cannot adjust the pore size of continuous foaming, and has great flexibility. However, there were drawbacks such as not being able to be obtained.
Further, conventionally, as an example of a formation similar to human skin using silicone rubber, there is an artificial breast made of silicone rubber as a prosthesis to be attached to a breast position of the chest that has been lost due to breast cancer, and this is a so-called foam. The foam type is an artificial breast made of silicone rubber mixed with a large amount of silicone oil.The balloon type is an artificial breast formed with a silicone rubber film and air is injected into the breast. The properties, elasticity, shape retention, strength, etc. are satisfied to some extent.However, the former has a large amount of silicone oil mixed in, so the silicone oil oozes out and the surface is sticky and sticky. In addition to the necessity of covering the whole with a film, there is a drawback that it becomes heavy. The latter has the properties of rubber itself, and has drawbacks different from the human skin feel.
Therefore, during molding of silicone rubber, an attempt was made to mix granules of sodium chloride, harden, and elute the salt with water to make the silicone rubber molded body porous, but it was attempted to use sodium chloride as a water-soluble substance. It was confirmed that it was practically difficult to form a fine continuous porous material similar to human skin by diluting water into a silicone rubber and curing it, then immersing it in water and flowing it out. .
[0003]
[Problems to be solved by the invention]
The present invention provides a silicone rubber porous molded body that can be formed into a fine continuous porous molded body without adding a foaming agent and without a change in volume after molding.
In addition, the present invention provides a silicone rubber porous molding which imparts surface properties, texture, lightness, flexibility, elasticity, shape retention, strength, and the like similar to human skin, and is easy to produce and excellent in moldability. In addition to providing a body, in addition to mannequins, dolls, medical training dummies, traffic accident test dummies, etc., artificial breasts (including pads), other forms and masks similar to human skin, masks, bandages, covers, etc. An object of the present invention is to provide a silicone rubber porous molded article suitable for manufacturing parts, filters, and the like.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the silicone rubber porous molded article of the present invention is a room-temperature vulcanizable silicone rubber obtained by uniformly mixing a water-soluble substance granular material and a water-soluble organic substance liquid and adding a curing agent. The mixture is uniformly mixed and molded, and the cured compact is immersed in water to allow the water-soluble substance and the water-soluble organic substance to flow out, dried, and formed into a continuous porous molded body.
Further, in order to achieve the above object, the silicone rubber porous molded article of the present invention uses sucrose as a granular material of the water-soluble substance and uses ethylene glycol, propylene glycol, etc. as a liquid substance of the water-soluble organic substance. Using polyhydric alcohols.
Further, in order to achieve the above object, the silicone rubber porous molded body of the present invention uses urea for the granular material of the water-soluble substance, and uses ethylene glycol, propylene glycol or the like for the liquid substance of the water-soluble organic substance. It uses polyhydric alcohols.
In the present invention, the room temperature vulcanization type silicone rubber includes all of the so-called known one-component type RTV silicone rubbers and all of the so-called known two-component type RTV silicone rubbers. Including. Molding also includes casting or application of liquid RTV silicone rubber or paste-like RTV silicone rubber.
Further, in the present invention, before the RTV silicone rubber is cured and molded, the silicone oil can be uniformly mixed to reduce the hardness of the molded article after the curing and molding.
Further, in the present invention, the granular material of the water-soluble substance includes crystals of salt and other water-soluble inorganic substances, and all the crystals of the organic substance soluble in water, but sucrose granular powder having high water solubility, Urea granules and the like are preferred.
Usually, the particle size of the water-soluble substance is preferably in the range of about 30 to about 500 microns, so that a continuous porous compact having a small diameter or a large diameter is formed.
Further, in the present invention, the liquid matter of the water-soluble organic substance does not react with the RTV silicone rubber, and includes all the known liquid substances of the water-soluble organic substance which promote the outflow of the granular material of the water-soluble substance. If the water-soluble substance granules are uniformly mixed with the water-soluble organic substance liquid and coated with the water-soluble organic substance liquid, after molding and curing, the water-soluble substance granules can be water-soluble organically. Along with the liquid substance, it can easily flow out of the RTV silicone rubber molding. As the liquid substance of the water-soluble organic substance, polyhydric alcohols such as ethylene glycol, propylene glycol, dipropylene glycol, triethylene glycol, 2-methyl-2, 4-pentanediol, and glycerin are preferable.
[0005]
Embodiment 1 of the present invention
Embodiment 1 of the present invention is shown in FIG.
A female mold 50 of the human breast is uniformly mixed with 80 to 70% by weight of powdered sugar having an average particle size of 30 microns and 20 to 30% by weight of propylene glycol, and a small amount of a coloring material for nipple surface color is mixed. 100 parts by weight of a two-component type RTV silicone rubber (TSE3453TA · B manufactured by GE Toshiba Silicone Co., Ltd .; 25 kgf / cm in tear strength after curing), and the mixture was cast and applied to form an artificial breast papillary layer 1; A two-component RTV silicone rubber (GEE) in which 200 to 400% by weight of a homogeneous mixture of 80 to 70% by weight of powdered sugar having an average particle size of 30 μm and 20 to 30% by weight of propylene glycol, and a small amount of a coloring material for breast surface color are mixed. Toshiba Silicone Co., Ltd.'s TSE3453TA • B, tear strength after curing 25 kgf / cm) 100% by weight A mold is applied to form an artificial breast surface layer 10, and on the inner surface of the surface layer 10, 300 to 600% by weight of a uniform mixture of 95 to 80% by weight of granulated sugar having an average particle size of 200 μm and 5 to 20% by weight of propylene glycol, 25 to 50% by weight of a two-component RTV silicone rubber (TSE3453TA · B manufactured by GE Toshiba Silicone Co., Ltd .; 25 kgf / cm in tear strength after curing) and 75 to 50% by weight of silicone oil (TSF451-50 manufactured by GE Toshiba Silicone Co., Ltd.) And 100% by weight of the same were uniformly mixed and injected to form an artificial breast inner layer 20, and 80-70% by weight of powdered sugar having an average particle size of 30 microns and 20-30% by weight of propylene glycol were uniformly mixed. Two-component RTV silicone with 200-400% by weight of the product and a small amount of a breast surface colorant 100% by weight of rubber (TSE3453TA · B, manufactured by GE Toshiba Silicone Co., Ltd., tear strength after curing 25 kgf / cm), and then uniformly apply the mixture to form an artificial breast bottom layer 30 and heat at a low temperature of 150 ° C. or lower. To form an artificial breast molded body, immersed in water at 100 ° C. for 6 hours to allow sugars and propylene glycol to flow out, and then dried the molded body at about 100 ° C. for 4 hours to obtain a volume after molding. The artificial breast papillary layer 1, the artificial breast surface layer 10, and the artificial breast bottom layer 30 have a small-diameter continuous porous body and the artificial breast inner layer 20 bonded to them has a large-diameter continuous porous silicone with almost no change in volume. An artificial breast of a silicone rubber porous molded product of a continuous porous molded product was obtained. The artificial breast papillary layer 1, the artificial breast surface layer 10, and the artificial breast bottom layer 30 of the completed artificial breast of the silicone rubber porous molded body have a fine continuous porous layer, and are excellent in sweat absorption and breathability, and are close to human skin. The entire layer including the artificial breast papillary layer 1, the artificial breast surface layer 10, the artificial breast inner layer 20, and the artificial breast bottom layer 30 is similar to the human body skin, while having the surface property of the appearance and the feel of touch similar to human skin. An artificial breast of a silicone rubber porous molded body having feel, flexibility, elasticity, shape retention, strength and the like was obtained.
In addition, silicone oil (TSF-451-50 manufactured by GE Toshiba Silicone Co., Ltd.) mixed into the artificial breast inner layer 20 oozes on the surface of the artificial breast papillary layer 1, the surface of the artificial breast surface layer 10, and the surface of the artificial breast bottom layer 30. There is no. The artificial breast papillary layer 1 and the artificial breast surface layer 10 are completely similar in touch and feel to human skin, and training such as injection of injection needles, insertion of acupuncture needles, and acupressure can be practiced similarly to human skin.
[0006]
Embodiment 2 of the present invention
Embodiment 2 of the present invention is shown in FIG.
200-400% by weight of 80-70% by weight of powdered sugar having an average particle size of 30 microns and 20-30% by weight of propylene glycol in a female mold 50B of a human breast, and a small amount of a coloring material for nipple surface color. 100% by weight of a two-component RTV silicone rubber (KE1311T manufactured by Shin-Etsu Chemical Co., Ltd .; tear strength after curing: 25 kgf / cm (base agent to curing agent ratio: 10: 1)); A nipple layer 1B is formed, 200 to 400% by weight of a homogeneous mixture of 80 to 70% by weight of powdered sugar having an average particle size of 30 microns and 20 to 30% by weight of propylene glycol, and a small amount of a coloring material for breast surface color 2 100% by weight of a liquid type RTV silicone rubber (KE1311T manufactured by Shin-Etsu Chemical Co., Ltd .; tear strength after curing 25 kgf / cm (base agent to curing agent ratio 10: 1)). One mixture is cast-coated to form an artificial breast surface layer 10B, and a uniform mixture of 80-70% by weight of powdered sugar having an average particle size of 30 microns and 20-30% by weight of propylene glycol is 200-400% by weight. Liquid RTV silicone rubber (KE1311T, manufactured by Shin-Etsu Chemical Co., Ltd .; tear strength after curing 25 kgf / cm (base agent to curing agent ratio: 10: 1)) and 100% by weight, and uniformly mixed to form columnar material 40B. The lower end thereof is bonded to the inner surface of the artificial breast surface layer 10B near the artificial breast papillary layer 1B, and at the same time, 95-80% by weight of granulated sugar having an average particle size of 300 microns and 5-20% by weight of propylene glycol are uniformly mixed. Wt% and two-component RTV silicone rubber (KE1311T manufactured by Shin-Etsu Chemical Co., Ltd .; tear strength after curing 25 kgf / cm (based on base agent) 10: 1)) 25 to 50% by weight and 100% by weight of a homogeneous mixture of 75 to 50% by weight of silicone oil (RTV thinner manufactured by Shin-Etsu Chemical Co., Ltd.) are mixed and injected. A breast inner layer 20B is formed, buried around the column 40B, and 200 to 400% by weight of 80 to 70% by weight of powdered sugar having an average particle size of 30 microns and 20 to 30% by weight of propylene glycol are uniformly mixed. 100% by weight of a two-component RTV silicone rubber (KE1311T manufactured by Shin-Etsu Chemical Co., Ltd., with a tear strength of 25 kgf / cm after curing (10: 1 ratio of base agent to curing agent)) in which a small amount of the same colorant as the breast surface color is mixed. The mixture is uniformly mixed and injected and applied to form an artificial breast bottom layer 30B, which is combined with the upper end of the columnar material 40B, and is cured by heating at a low temperature of 150 ° C. or less at a low temperature. This was immersed in water at 100 ° C. for 6 hours to allow sugars and propylene glycol to flow out, and then the molded article was dried at about 100 ° C. for 4 hours. , The nipple 1B, the artificial breast surface layer 10B, the artificial breast bottom layer 30B, and the columnar material 40B have a small-diameter continuous porous body, and the artificial breast inner layer 20B bonded to them has a large-diameter continuous porous silicone continuous-porous molded article multilayer silicone. An artificial breast of a porous rubber molded body was obtained.
The artificial breast papillary layer 1B, artificial breast surface layer 10B, and artificial breast bottom layer 30B of the completed artificial breast of the silicone rubber porous molded body are formed with a fine continuous porous layer, and have a surface property similar to human skin and a human skin. And the entire layer including the artificial breast papillary layer 1B, the artificial breast surface layer 10B, the artificial breast inner layer 20B, and the artificial breast bottom layer 30B has a feeling, flexibility, and elasticity similar to human skin. , An artificial breast of a silicone rubber porous molded body having shape retention, strength and the like was obtained.
The silicone oil (RTV thinner manufactured by Shin-Etsu Chemical Co., Ltd.) mixed into the artificial breast inner layer 20B does not exude to the surface of the artificial breast papillary layer 1B, the surface of the artificial breast surface layer 10B, and the surface of the artificial breast bottom layer 30B.
Further, in the embodiment of the present invention, since the centers of the nipple layer 1B and the breast bottom layer 30B are directly connected by the pillars 40B, the sensation near the nipple is directly transmitted to the chest, and a skin sensation similar to that of a human breast is obtained. be able to.
The artificial breast papillary layer 1B and the artificial breast surface layer 10B are close to the surface of the human skin, and training such as injection of injection needles, insertion of acupuncture needles, and acupressure can be practiced in the same manner as human skin.
[0007]
Third Embodiment of the Invention
Third Embodiment A third embodiment of the present invention is shown in FIGS.
A two-pack RTV silicone rubber (Asahi Kasei Co., Ltd.) prepared by uniformly mixing 90% by weight of urea powder having an average particle size of 30 microns and 10% by weight of ethylene glycol in an artificial breast type 50C and 300% by weight and a small amount of a teat colorant. 100% by weight of Wacker Silicone ELASTOSIL M8520 (base agent to curing agent ratio: 100: 4)), uniformly cast and coated to form a thin film papillary layer 1C, 90% by weight of urea powder having an average particle size of 30 microns and 90% by weight of ethylene. 100% by weight of a two-part RTV silicone rubber (Asahi Kasei Wacker Silicone ELASTOSIL M8520 (100: 4 ratio of base agent to curing agent)) in which 300% by weight of a uniform mixture of 10% by weight of glycol and a small amount of a colorant for breast surface color are mixed. % And uniformly cast and applied to form a breast surface layer 10C having an average particle size of 300 microns. 350% by weight of a uniform mixture of 90% by weight of granular urea and 10% by weight of ethylene glycol, and 100% by weight of a two-component RTV silicone rubber (Asahi Kasei Wacker Silicone ELASTOSIL VP7550 (base agent: hardener ratio 100: 6)) Uniformly mix and inject to form inner breast layer 20C, uniformly mix 90% by weight of urea powder with an average particle size of 30 microns and 10% by weight of ethylene glycol, 300% by weight, and a small amount of the same colorant as the surface color of the breast 100 parts by weight of the mixed two-component RTV silicone rubber (Asahi Kasei Wacker Silicone ELASTOSIL M8520 (base agent to curing agent ratio 100: 4)) is uniformly mixed and cast and applied to form the breast bottom layer 30C and the bottom surface. Layer 30C is provided with a so-called magic tape having a large number of small hook-like threads protruding on the surface. The back surface of the annular cloth 40C (or the annular cloth 40C with a so-called magic tape having a large number of small loop-shaped yarns protruding on the surface) is adhered and cured at room temperature for 24 hours to produce an artificial breast molded body. After the urea and ethylene glycol were immersed in water at 23 ° C. for 4 hours to drain urea and ethylene glycol, the molded body was dried at about 100 ° C. for 2 hours. 1C, the breast surface layer 10C and the breast bottom layer 30C obtained an artificial breast of a silicone continuous porous molded body having a small-diameter continuous porous body and a breast inner layer 20C bonded to them having a large-diameter continuous porous body.
This artificial breast can exhibit the same characteristics as the operation and effect of the above-described embodiments of the present invention, and is a so-called ring-shaped cloth 50C with a so-called magic tape having a large number of small loop-like projections protruding on its surface. A human breast having one or more breasts removed from a breast having one or more breasts (shown with a so-called magic tape-like annular cloth 50C having a large number of small hook-like threads protruding on the surface) having substantially the same shape as the annular cloth 40C (shown) As shown in FIG. 4, an adhesive surface 52C from which the release film 51C of the annular cloth 50C has been removed is attached to the small loop-shaped thread 531C (or a large number) that protrudes from the surface of the annular cloth portion 53C. Entangled with the small needle-like thread (or small loop-like thread) 41C of the annular cloth 40C, the artificial breast adheres to the human chest, and is extremely lightweight, so that even when intense exercise is performed, To It can be lifting.
[0008]
【The invention's effect】
The present invention differs from foam casting in that, without a change in volume, a continuous porous molded body can be manufactured substantially according to the volume of the mold, and its manufacture is extremely easy. Porosity, pore size, hardness, lightness, Elasticity, coloring, etc. can be freely adjusted depending on the particle size and blending amount of the water-soluble substance, and the heat resistance, cold resistance, chemical and oil resistance, weather resistance, impact resistance, electrical insulation of the original silicone rubber And safety and hygiene.
In addition, since the product of the present invention is mainly composed of a continuous porous molded body, it is extremely light, and can exhibit functions that are not inferior to human skin in terms of breathability and sweat absorption, and can be used for artificial breasts, artificial legs, artificial hands and other artificial human body parts, and mannequins. It is expected that the accuracy of products such as dummy dolls for medical training and traffic accident experiments will be improved.
In addition, products such as filters, masks, bandages, and therapeutic covers can be molded freely and have the advantage of being easily and easily manufactured.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a cross-sectional view of an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a cross-sectional view of another embodiment of the present invention.
FIG. 3 is an explanatory view showing another embodiment of the present invention in a sectional view.
FIG. 4 is an explanatory view showing a so-called magic tape cloth used in FIG. 3 in a partial sectional view.
[Explanation of symbols]
1, 1B, 1C Artificial breast papillary layer 10, 10B, 10C Artificial breast surface layer 20, 20B, 20C Artificial breast inner layer 30, 30B, 30C Artificial breast bottom layer 40B Column 40C So-called magic tape cloth 50C So-called magic tape cloth

Claims (3)

A water-soluble substance powder and a water-soluble organic substance liquid are uniformly mixed, uniformly mixed with a room temperature vulcanizable silicone rubber to which a curing agent has been added, and molded, and the cured molded body is immersed in water. Wherein the water-soluble substance and the water-soluble organic substance are allowed to flow out, dried and formed into a continuous porous molded article. 2. The silicone according to claim 1, wherein sucrose is used as the water-soluble substance granular material, and polyhydric alcohols such as ethylene glycol and propylene glycol are used as the water-soluble organic substance liquid. Rubber porous molded body. 2. The silicone rubber according to claim 1, wherein urea is used for the granular material of the water-soluble substance, and polyhydric alcohols such as ethylene glycol and propylene glycol are used for the liquid substance of the water-soluble organic substance. Porous molded body.

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