JP2008142264A - Composite material for body surface contact implement and body surface contact implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite material for a body surface contact implement hardly causing uncomfortable feeling due to the displacement of the implement or steaming even using long time because fittedness to a body surface and air permeability are good and the body surface contact implement constituted of the composite material for the body surface contact implement. <P>SOLUTION: The composite material for the body surface contact implement is constituted of a fiber base material having a plurality of holes in the surface and a silicone resin layer formed on the same and having through holes facing the holes and has air permeability of 10 sec or less. The body surface contact implement is constituted of the composite material for the body surface contact implement. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a composite material for a body surface contact device and a body surface contact device formed therefrom. More specifically, it comprises a fiber base material and a silicone resin layer formed thereon, and constitutes a body surface contact device such as a supporter, a prosthetic limb or a lower wrap bandage used in the fields of medicine, sports, etc. And a body surface contact device.

  For the treatment and protection of the affected area, a soft or hard supporter that can be coated in accordance with the shape of the affected area is used. Also, sleeve-like or belt-like appliances are used for under-wrapping such as supporters, artificial limbs, casts, casts, and sprints. These braces are fixed to the wearing site by the elasticity of the brace itself and attached belts, etc., but as the human body moves during wearing, the brace is displaced or loosened from the wearing site. May interfere with protection.

For this reason, the device for preventing these braces from shifting | deviating from a desired mounting | wearing site | part is made | formed.
Patent Document 1 discloses a rubber-like elastic band made of a silicone polymer compound and a reinforcing band for medical treatment or sports, etc., which is provided with surface-to-surface adhesiveness.
Patent Document 2 discloses a knee joint soft convolution device in which a silicone resin is applied to the back surface of a fabric.
According to the techniques of Patent Documents 1 and 2, the slip prevention function is improved by the adhesion of the silicone resin. However, the reinforcement band described in Patent Document 1 and the device described in Patent Document 2 are both poorly breathable, and when used for a long time, dermatitis due to sweat or the like occurs, Sweat accumulates in the meantime, which may impair the function of preventing the skin from slipping.

  Patent Document 3 discloses a laminate composed of a stretchable knitted fabric and a silicone gel porous body, in which silicone gel penetrates into the stitch hole of the knitted fabric but penetrates the stitch hole and reaches the knitted surface. No laminates are disclosed. This laminated body has poor function of preventing the displacement of the brace and has poor air permeability. Therefore, a large amount of perspiration may cause stuffiness and discomfort.

Patent Literature 4 discloses an undersleeve for a joint brace provided with a silicone rubber as a non-slip on a back side of a main body made of a stretchable material in a dot shape.
Further, Patent Document 5 discloses a knee supporter in which silicone rubber is attached to the upper and lower ends of a supporter in a dot shape.
The braces described in Patent Documents 4 and 5 are improved in the air permeability of the devices themselves, but on the other hand, the anti-slip function and the durability as a non-slip are lowered. In addition, when the appliance is displaced, the stress applied to the skin is increased, which may cause discomfort.

Japanese Utility Model Publication No. 58-92978 JP-A 62-102756 No. 4-50110 JP-A-10-99358 JP 2005-54332 A

  Accordingly, an object of the present invention is to provide a composite material for a body surface contact device that has good adhesion and breathability to the body surface, and is less prone to discomfort due to displacement or stuffiness of the device even when worn for a long time, and the body surface It is providing the body surface contact apparatus comprised from the composite material for contact apparatuses.

In order to solve the above-mentioned problems, the present inventor has made extensive studies on means for improving the breathability of the brace. As a result, it has been found that by forming a silicone resin layer having a specific structure on the fiber substrate, it is possible to simultaneously improve the air permeability and the effect of preventing deviation, and to complete the present invention based on this knowledge. It came.
Thus, according to the present invention, it comprises a fiber base material having a plurality of pores on the surface, and a silicone resin layer formed on the fiber base material and having a through-hole facing the pores, and has an air permeability. A composite material for body surface contact orthosis is provided that is 10 seconds or less.
In the composite material for body surface contactor of the present invention, the average cross-sectional area of pores is 0.04 to ² mm ² on the surface of the fiber substrate, and the number of holes is 10 to 500 per cm ^{2 of the} fiber substrate surface. Preferably there is.
The composite material for body surface contactor of the present invention preferably has a tension at 50% elongation of 0.5 to 30 N / 25 mm and an elongation rate at 5 N load of 20 to 85%.
In the composite material for body surface contactor of the present invention, the silicone resin layer preferably contains a silicone oil having a weight average molecular weight of 30,000 to 200,000.

Further, according to the present invention, the fiber base material having a plurality of pores on the surface and the silicone resin layer having a through hole facing the pores formed on the fiber base material, the pores The average cross-sectional area of the fiber base surface is 0.04 to ² mm ² , the number of pores is 10 to 500 per 1 cm ^{2 of the} fiber base surface, and the silicone resin layer has a weight average molecular weight of 30,000 to 200,000. Thus, a composite material for body surface contactor is provided, which contains the silicone oil.

Furthermore, according to this invention, the body surface contact apparatus comprised from the said composite material for body surface contact apparatuses is provided.
The body surface contactor of the present invention is suitable for a sleeve-like bandage for lowering a prosthetic limb.

  The composite material for body surface contactor of the present invention has a continuous silicone resin layer as a body surface contact surface, and thus has excellent adhesion and followability to the body surface, and the silicone resin layer has a large number of penetrations. Since the hole is formed, it has high air permeability. Therefore, the body surface contact device constituted by the device does not deviate from the wearing site even if it is used for a long time. Absent.

  The composite material for body surface contactor of the present invention comprises: a fiber base material having a plurality of holes on the surface; and a silicone resin layer formed on the fiber base material and having a through hole facing the holes. Become.

The fiber substrate used in the present invention is a planar substrate composed of fibers. The form is not particularly limited, and examples thereof include a knitted fabric, a woven fabric, a nonwoven fabric, and a net, but a knitted fabric that can easily form pores on the surface of the fiber base material is preferable.
These fiber base materials may be used alone or may be a base material having a laminated structure in which a plurality of base materials having the same or different types of forms are laminated.
As the knitted fabric, various knitting structures such as warp knitting and weft knitting can be used. Particularly suitable knitted fabrics are plain knitted fabric, rubber knitted fabric, tricot fabric, raschel fabric and double raschel fabric.
The woven fabric may be any of plain weave, twill weave and satin weave.
The nonwoven fabric may be any one of a dry method, a wet method, and a spunbond method as a fleece forming method, and the fiber bonding is a spunlace method, a needle punch method, a chemical bond method, a point seal method, a thermal method It may be formed by any method such as a bond method.
The net can be formed by arranging a plurality of long fibers at appropriate intervals so that a mesh is formed, and bonding the fibers together by a bonding means such as heat fusion or adhesive.

Monofilaments, multifilaments, twisted yarns, covered yarns, core yarns, and the like can be used as the yarns constituting the fiber base material, and yarns subjected to expansion / contraction processing, bulky processing, or the like may be used.
The type of fiber is not particularly limited, and polyester fiber, acrylic fiber, polyamide fiber, polyurethane fiber, cellulosic fiber (cotton, rayon, polynosic, lyocell), polyolefin fiber, polyvinyl chloride fiber, polychlorinated fiber. Vinylidene fibers, glass fibers, carbon fiber fibers and the like can be used.
Particularly preferred fiber materials are thermoplastic polyester fibers, acrylic fibers and polyamide fibers.

  The thickness of the fiber substrate is preferably 0.5 mm or more. When the thickness is less than 0.5 mm, when the silicone resin layer is formed on the fiber base material, the pores of the fiber base material may be blocked by the silicone resin and the air permeability may be lowered.

The fiber substrate used in the present invention needs to have a plurality of pores on its surface.
Here, the term “hole” refers to a portion recessed from the surface of the surrounding fiber base material, but it may be a through hole penetrating the fiber base material.
The average cross-sectional area of the plurality of holes that the fiber base has on the surface thereof is preferably 0.04 to ² mm ² per hole on the surface of the fiber base, and preferably 0.04 to 1 mm ^2. Further preferred. When the average cross-sectional area is smaller than 0.04 mm ² , when the silicone resin layer is formed on the fiber base material, the silicone resin penetrates into the pores of the fiber base material, and it is difficult to form through holes in the silicone resin layer. Breathability may be deteriorated. On the other hand, if the average cross-sectional area of the pores is larger than 2 mm ² , the strength of the fiber base material may be reduced, or a sufficient contact area between the silicone resin layer and the body surface may not be obtained, resulting in reduced adhesion. is there.
In the fiber base material of the present invention, the number of pores is preferably 10 to 500 per 1 cm ^{2 of the} fiber base surface, and more preferably 15 to 450. When the number of pores is more than 500, when the silicone resin layer is formed on the fiber base material, the silicone resin penetrates into the pores of the fiber base material, and it becomes difficult to form the through holes in the silicone resin layer. May get worse.
A particularly suitable fiber substrate is a fiber substrate in which the area of one hole is 0.04 to ² mm ² and the number of holes is 10 to 500 / cm ² .

In the present invention, the hole area ratio per 1 cm ^{2 of the} fiber substrate surface calculated from the average cross-sectional area of the holes and the number of holes per 1 cm ^{2 of the} fiber substrate is 5 to 50%. Preferably, it is 5 to 20%. If the pore area ratio is less than 5%, the air permeability is not sufficient, and if it is more than 50%, it is difficult to form a continuous planar silicone resin layer when the silicone resin layer is formed on the fiber substrate. As a result, the adhesion between the body surface contact device and the body surface is lowered, the adhesiveness between the silicone resin layer and the fiber substrate is lowered, and the buffering action may be lowered.

  The arrangement of the pores on the surface of the fiber substrate is not particularly limited, and may be randomly scattered, arranged in a line, lattice, wavy or other pattern. Although a combination of patterns may be used, it is preferable that the pores are arranged substantially uniformly on the surface of the fiber base so that uniform air permeability can be easily obtained over the entire fiber base.

The pores on the surface of the fiber base material include through-holes due to the stitches of the knitted fabric, pores generated on the fabric surface due to the balance of the fiber structure (including yarn thickness, density, etc.), between the warp and weft of the woven fabric It may be what the fiber base material originally has, such as a gap to be formed, or may be formed by embossing or the like on the surface of the fiber base material not having pores.
Among these, the holes formed on the surface of the fabric due to the balance of the through-holes and the knitting structure (including yarn thickness, density, etc.) due to the loop of the knitted fabric have a good fit to the human body in the fiber base material itself, This is preferable because a silicone resin layer having pores can be easily formed.
Preferable examples of such a fiber base material include a knitted fabric having a bulky knitted structure such as a knitted fabric made of rubber knitting, a raschel fabric, and a double raschel fabric. Since the former can form a ridge part on the surface of the fabric, the groove part formed between the ridge parts can be used as a linearly arranged hole, and the latter is formed by its three-dimensional structure. Can be used as a hole.

The composite material for body surface contactor of the present invention has a silicone resin layer formed on a fiber substrate. The silicone resin is preferably cured by crosslinking or the like. The curing method of the silicone resin is not particularly limited, and can be easily crosslinked by heating or the like.
The silicone resin for forming the silicone resin layer is not particularly limited, and any of addition reaction type, peroxide reaction type and condensation reaction type may be used, but addition reaction type silicone is preferable.
The addition reaction type silicone is formed by chlorinating an organopolysiloxane having an alkenyl group bonded to a silicon atom (alkenyl group-containing organopolysiloxane) and an organopolysiloxane having a hydrosilyl group (Si-H) (hydrogen organopolysiloxane). This is an addition reaction (hydrosilylation reaction) using a platinum compound catalyst such as platinum acid.
The addition reaction type silicone polymer can adjust the crosslink density by changing the amount of organohydrogenpolysiloxane used for the synthesis and the amount of hydrosilyl group (Si-H) in the organohydrogenpolysiloxane molecule. it can. Thereby, the hardness and tack | tuck of the silicone resin layer used by this invention can be adjusted easily.
In the present invention, the addition reaction type silicone is preferably an addition reaction product of vinyl group-substituted polydimethylsiloxane and organohydrogenpolysiloxane.
Moreover, a silicone resin may be used individually by 1 type, or may be used in combination of 2 or more types.

  In the production of the composite material for body surface contactor of the present invention, it is preferable to cure the silicone resin by crosslinking or the like. However, the addition reaction type silicone uses either an open type or a sealed type as a reaction device for crosslinking. In addition, it is advantageous in that both normal temperature curing and heat curing are possible, and an organic solvent is not required as a solvent for the polymer and no by-product is generated after the reaction.

As for the silicone resin used by this invention, it is preferable that the surface hardness of the hardened | cured material exists in the range of A0-A30 (or C1-C60 in durometer hardness) in durometer hardness, and A0-A10 in durometer hardness. (Or durometer hardness of C5 to C35) is particularly preferable.
When the hardness of the silicone resin is within the above range, the adhesion to the body surface, the feeling of wearing, the durability and the like are good.

The silicone resin layer preferably contains a silicone oil having a weight average molecular weight of 30,000 to 200,000, and more preferably contains a silicone oil having a weight average molecular weight of 50,000 to 200,000.
Although content of silicone oil is not specifically limited, It is preferable that it is the range of 1-45 weight part with respect to 100 weight part of silicone resins, and it is especially preferable that it is the range of 5-40 weight part.
The silicone oil is not particularly limited, and specific examples thereof include a silicone oil composed only of a siloxane structure and an alkyl group, such as linear, branched, or cyclic dimethylpolysiloxane; phenyl-modified silicone oil, amino-modified Examples include silicone oils in which an alkyl group is modified with various functional groups, such as silicone oil, polyether-modified silicone oil, carboxyl-modified silicone oil, alcohol-modified silicone oil, and methacryl-modified silicone oil. Among these, a silicone oil composed only of a siloxane structure and an alkyl group is preferable, and dimethylpolysiloxane is more preferable.
The viscosity of the silicone oil added to the silicone resin layer is preferably 2,000 to 1,000,000 mPa · s, and more preferably 10,000 to 1,000,000 mPa · s.
When the viscosity and molecular weight of the silicone oil are within the above ranges, the viscosity of the silicone resin solution before curing is in an appropriate range, and the silicone resin layer having through-holes is not formed on the fiber base without allowing the silicone resin to penetrate from the fiber substrate. It becomes easy to form on the material.
In addition, since the silicone oil having the above viscosity and molecular weight range and the cured silicone resin have good compatibility, the silicone oil does not bleed from the silicone resin layer, and the silicone resin layer feels good and the body surface Adhesiveness to is also excellent.

In the present invention, the silicone resin layer may contain a plasticizer and a filler such as silica. This makes it easy to adjust the hardness and tack of the silicone resin layer after curing and the viscosity of the silicone resin stock solution before curing.
The content of the filler in the silicone resin layer is not particularly limited, but is preferably in the range of 1 to 40 parts by weight, particularly in the range of 1 to 15 parts by weight, with respect to 100 parts by weight of the silicone resin. preferable.
In the silicone resin layer, various adjusting agents such as various agents, surfactants, powders, antibacterial agents, and coloring agents can be appropriately blended as long as the object of the present invention is not impaired.
Examples of the drug may include substances that adjust the physiological function of the skin for the purpose of moisturizing, preventing aging, and whitening, and substances that promote wound healing. Specific examples thereof include ceramide, sodium hyaluronate, amino acid, hydrolyzed peptide, urea, vitamins, coenzyme Q10, polyphenol and the like.

In the composite material for body surface contactor of the present invention, the silicone resin layer preferably has an integrated value of surface tack force in the range of 3.5 to 15 mN · sec / 5 mmΦ, and the maximum surface tack force of the silicone resin layer is 10 to 10. It is preferably 150 mN / 5 mmΦ.
Moreover, it is preferable that a silicone resin layer has a surface static friction coefficient of 3-8, and it is preferable to have a dynamic friction coefficient of 1-5.
When the silicone resin layer has these characteristics, the adhesion to the body surface is excellent.

The amount of the silicone resin layer formed on the fiber substrate is preferably 0.005 to 0.5 g per 1 cm ² of one surface of the fiber substrate. If the amount is less than 0.005 g / cm ^2, it is difficult to form a uniform silicone resin layer on the fiber base material, when it is more than 0.5 g / cm ^2, a silicone resin is choked pore portion As a result, through holes may not be formed in the silicone resin layer, or the silicone resin may fall through the fiber base material, resulting in deterioration of air permeability.

The method for forming the silicone resin layer on the fiber substrate is not particularly limited, but the following transfer method is preferred.
In this method, first, a silicone resin before curing is applied to a release sheet, and then a fiber substrate having pores is bonded onto the applied silicone resin. At this time, by appropriately adjusting the composition and viscosity of the silicone resin, a part of the silicone resin penetrates into the fiber substrate from the contact surface with the fiber substrate, but completely covers the side wall and bottom of the pore portion. Do not.
Next, the silicone resin is heated and cured in a state where the silicone resin and the fiber base material are bonded together. Thereafter, by removing the release sheet, a fiber base material in which the silicone resin layer is not transferred to the hole portions and the silicone resin is transferred to the other portions is obtained. That is, a planar silicone resin layer that has a through hole in a portion facing the pores of the fiber substrate and covers a portion other than the pores is formed on the fiber substrate.
Thus, the composite material for body surface contact device of the present invention, comprising a fiber base material having a plurality of pores on the surface and a silicone resin layer having a through hole facing the pores formed thereon. Is obtained.

  The size and the number of through-holes on the silicone resin side surface of the composite material for body surface contactor of the present invention can be determined by forming a silicone resin layer on the surface of the fiber substrate by the method described above. This is approximately the same as the size and number of holes.

In addition, as a release sheet, a release paper, a release film, or a film of polycarbonate, polyvinyl alcohol, cellophane, urethane, or the like treated with a silicone-based or fluorine-based release agent can be used.
The method for applying the silicone resin to the release sheet is not particularly limited, and the coating weight or the like can be controlled using a known coating method such as comma direct, knife coater, or gravure direct.

  In the composite material for body surface contactor of the present invention, it is preferable that at least a part of the silicone resin layer penetrates (invades) the fiber base material. However, it is preferable that the silicone resin does not permeate (penetrate) into the fiber base or is partially permeated (penetrated) at the bottom of the hole portion of the fiber base to ensure air permeability.

  In the composite material for body surface contactor of the present invention, the silicone resin layer may be formed on at least one surface of the fiber base material, but the silicone resin layer may be formed on both surfaces of the fiber base material. When a silicone resin layer is provided on both surfaces, it can be used as an undersleeve for an orthosis or a prosthetic limb when preventing the orthosis or the prosthesis from being displaced.

The composite material for body surface contactor of the present invention has an air permeability of preferably 10 seconds or less, and more preferably 1 second or less, in order to prevent stuffiness and discomfort.
The composite material for body surface contactor of the present invention has a tension at 50% elongation of 0.5 to 30 N / 25 mm so as not to excessively suppress the mobility when it is worn and to apply stress to the skin. It is preferable to have.
Moreover, in order to improve the adhesiveness to the body surface at the time of skin expansion-contraction, it is preferable that the elongation rate at the time of 5N load is 20 to 85%.
It is particularly preferable that the composite material for body surface contactor of the present invention has a tension at 50% elongation of 0.5 to 30 N / 25 mm and an elongation ratio at 5 N load of 20 to 85%.

The body surface contact device of the present invention can be constituted using the composite material for body surface contact device of the present invention.
Specifically, the body surface contact device can be produced by a conventionally known sewing method using the composite material for body surface contact device.
The body surface contact device of the present invention can be in the form of a sleeve, a band, a sheet, or the like that conforms to the shape of the body surface. In that case, it forms so that a silicone resin layer may become the surface which contacts a body surface.
Moreover, a hook-and-loop fastener, a belt, etc. may be suitably installed in the brace as auxiliary means for fixing the brace to the body surface.
The body surface contactor of the present invention is suitable for mounting on joints, muscles and the like that are likely to cause trauma such as ankle, knee, calf, thigh, waist, chest, shoulder, wrist, and neck.
In the body surface contact device of the present invention, the planar silicone resin layer is in close contact with the skin of the body surface to prevent the device from being displaced, and many through holes formed in the silicone resin layer are displaced from the device due to steam or sweat. To prevent.
Specific product examples of the body surface contactor of the present invention include muscle and joint supporters, artificial limbs, undersleeves for artificial limbs and external fixation materials, socks, stockings, tights, swimwear, underwear, etc. .
In addition to the above products, the body surface contact device is a variety of devices that are required to have a function of preventing displacement and cushioning when worn, such as a wound dressing applied to a body surface with a wound such as a burn, an ulcer, or an absorbent pad. The present invention can also be suitably applied to various wound care materials.
The body surface contact device of the present invention is particularly suitable as a sleeve-shaped device with one end closed for lower winding of a prosthesis. Prosthetic limbs tend to cause dermatitis due to stuffiness because the skin is almost sealed for a long time, and friction and impact due to prosthetic limbs are applied to the skin, so the device of the present invention excellent in breathability, adhesion and shock buffering It is preferable to apply.

Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited thereto. In addition, unless otherwise indicated, the part and% in each example are a basis of weight.
Moreover, each characteristic regarding the composite material for orthosis of this invention was measured with the following method.

[Average cross-sectional area of pores on the fiber substrate surface (unit: mm ² )]
The surface of the fiber substrate is magnified 25 times from directly above in the vertical direction and observed with a microscope, and the cross-sectional area of the five holes in the fiber substrate surface is measured, and the average value is obtained.

[Number of pores on the fiber substrate surface]
The surface of the fiber base material is visually observed under a microscope from directly above in the vertical direction, and the number of holes included in a 1 cm × 1 cm range on the surface of the fiber base material is counted at any five locations to obtain an average value. .

[Fiber base thickness]
According to JIS L 1096 “General Textile Test Method”, the fiber base material thickness before forming the silicone resin layer is measured.

[Coating amount of silicone resin layer (unit: g / cm ² )]
The weight (W1) of the fiber base material before forming the silicone resin layer and the weight (W2) of the composite material for body surface contact equipment after forming the silicone resin layer on the fiber base material are measured. This weight difference (W2-W1) is divided by the surface area of the fiber substrate.

[Air permeability of brace composite material (unit: seconds / 100ml)]
The air permeability (air permeability resistance) of the composite material for body surface contact equipment is measured according to JIS P 8117 “Paper and paperboard—Air permeability test method—Gurley test machine method”. The air permeability is the number of seconds required for 100 ml of air to pass through the body surface contact device composite material having an area of 642 mm ² .

[Tension at 50% elongation of composite material for body surface contactor]
In accordance with JIS Z 0237 “Tensile strength and elongation”, the load at the time of 50% displacement (N / 25 mm) of the composite material for body surface contact equipment was measured on a tensile tester (25 mm wide × 150 mm long). Using a Shimadzu Corporation product name “Autograph AG-I”), the distance between chucks is 50 mm and the tensile speed is 100 mm / min.

[Elongation rate at 5N load of composite material for body surface contactor]
In accordance with JIS Z 0237 “Tensile strength and elongation”, the elongation rate (%) of a composite material for body surface contact equipment at 5N load is measured for a tensile tester (Shimadzu Corporation). Using a trade name “Autograph AG-I” manufactured by the company, measurement is performed under conditions of a distance between chucks of 50 mm and a tensile speed of 100 mm / min.

[Surface tack of silicone resin layer]
The surface tack force integral value (mN · sec / 5 mmΦ) and the maximum surface tack force (mN / 5 mmΦ) of the silicone resin layer are measured using a probe tack tester (trade name “Tackiness Tester” manufactured by Reska Corporation).
The tack force in the process of bringing a 5 mm diameter probe into contact with the silicone resin layer side of the composite material for body surface contactor at 120 mm / min, pushing in for 0.1 sec at a load of 98 mN, and pulling away at a speed of 120 mm / min. The maximum value is the maximum surface tack force (mN / 5 mmΦ). Further, the integrated value of the tack force in the entire pulling process is defined as the integrated value of the surface tack force (mN · sec / 5 mmΦ).

[Friction coefficient of silicone resin layer surface]
JIS P 8147 “Friction coefficient test method for paper and paperboard—horizontal method” and JIS K 7125 “Plastic film and sheet—Friction coefficient test method”.
First, a test piece taken from the composite material for body surface contact equipment is attached to a contact surface of a weight of 1 kg in weight and a contact area of 40 cm ² with a double-sided tape so that the silicone resin layer becomes a contact surface for measuring the friction coefficient (contact with the weight). Attaching the fiber base layer to the side). A weight is placed on a foamed polyethylene plate (trade name “Bell Pollen” manufactured by Tatsuta Chemical Co., Ltd.) so that the silicone resin layer attached to the weight contacts the plate, and a tensile tester (trade name “INSTRON 5564” manufactured by Instron Co., Ltd.) is used. Then, slide the weight at a pulling speed of 100 mm / min, calculate the static friction coefficient from the maximum load measured, and calculate the dynamic friction coefficient from the average value of the load measured during the moving distance of 30 mm after the weight starts moving. Is calculated.

FIG. 1 shows an embodiment of the composite material for body surface contactor of the present invention. (A) is a perspective view of the composite material for body surface contact orthosis of this invention, (b) is sectional drawing which follows the bb line of (a).
In the composite material 1 for an orthosis of the present invention, a silicone resin layer 3 is formed on a fiber base material 2, and the silicone resin layer 3 becomes a surface in contact with the body surface. The fiber base material 2 has a large number of pores 4 on the surface thereof, and the silicone resin covers the fiber base material other than the pore 4 portions. Accordingly, the silicone resin layer 3 having a large number of through holes 5 is formed on the surface of the fiber base material. In other words, the numerous through holes 5 of the silicone resin layer 3 are formed in portions of the fiber base 2 facing the numerous holes 4 without closing the holes 4 with the silicone resin.
In FIG. 1B, in order to clarify the positions of the holes 4 and the through holes 5 and their distinction, one of the holes 4 is a broken trapezoid and one of the through holes 5 is a broken rectangle. Is shown.

[Example 1]
Two-component addition-reactive silicone polymer mainly composed of vinyl group-substituted polydimethylsiloxane, organohydrogenpolysiloxane and platinum catalyst (trade name “DOW CORNING 7-9800” manufactured by Dow Corning). 35 parts by weight, a two-component addition-reactive silicone polymer mainly composed of vinyl group-substituted polydimethylsiloxane, organohydrogenpolysiloxane, and platinum catalyst (manufactured by Dow Corning Co., Ltd., trade name “DOW CORNING C6-540”) "Hereinafter referred to as" silicone resin B ") 35 parts by weight, dimethyl silicone oil having a weight average molecular weight of 60,000 and a viscosity of 12,500 mPa · s (trade name“ SH200 Fluid 12,500 CS ”manufactured by Dow Corning) ) 30 parts by weight Mixed.
The resulting mixture was coated on a silicone release sheet, then this, the number 28 of the average cross-sectional area 0.25 mm ^2, 1 cm ² per cavity of the pores, pore area ratio per 1 cm ² A 7% fiber base material was bonded and heated in this state at 110 ° C. for 10 minutes to cure the silicone resin. After that, the release sheet is removed, and the body surface contact is formed on the fiber substrate with a planar silicone resin layer that has a through hole in the portion facing the pore of the fiber substrate and covers the portion other than the pore A composite material for the brace was obtained.
An enlarged photograph of the fiber base material used at this time is shown in FIG. 2, and an enlarged photograph of the obtained composite material for body surface contact equipment on the silicone resin layer side is shown in FIG.
Table 1 shows the results of evaluation of each characteristic of the composite material for body surface contact orthosis.

[Example 2]
Example 1 except that a fiber base material having a pore average cross-sectional area, a number of holes and a hole area ratio (these are shown in Table 1) different from the fiber base material used in Example 1 was used. In the same manner, a composite material for body surface contactor was obtained. Table 1 shows the results of evaluating the characteristics of the composite material for body surface contactor as in Example 1.

Example 3
The ratio of silicone resin A, silicone resin B and silicone oil was changed as shown in Table 1, and a composite material for body surface contactor was obtained in the same manner as in Example 1 except that 5 parts of silica was further mixed. .
Table 1 shows the results of evaluating the characteristics of the composite material for body surface contactor as in Example 1.

[Comparative Example 1]
70 parts by weight of silicone resin B and 30 parts by weight of hexane were mixed. The obtained mixed liquid was applied to a silicone release sheet, and then the fiber base material was bonded together and heated at 110 ° C. for 10 minutes to evaporate and remove hexane and cure the silicone resin. Thereafter, the release sheet was removed to obtain a composite material for body surface contact equipment in which the surface of the fiber base material was uniformly coated with a silicone resin layer. Table 1 shows the results of evaluating the characteristics of the composite material for body surface contactor as in Example 1.

[Comparative Example 2]
The same addition reaction type silicone polymer (silicone resin B) as used in Example 1 was dropped on the same fiber substrate as used in Example 1, and then heated at 110 ° C. for 10 minutes to form the fiber substrate surface. A composite material for body surface contactor, in which silicone resin was present in the form of dots, was obtained. The area of one point of the silicone resin was 2 mm ² , and the ratio of the total area of the dotted silicone resin to the area of the entire fiber substrate was 30%. Table 1 shows the results of evaluating the characteristics of the composite material for body surface contactor as in Example 1.

As shown in the results of Table 1, the composite material for body surface contactor of the present invention has an air permeability, tack force, friction coefficient, tension, elongation rate suitable for satisfying adhesion to the body surface and air permeability. Etc.
Therefore, it is possible to form a body surface contact device that does not cause discomfort due to slippage or stuffiness even when worn for a long time using the composite material for body surface contact device of the present invention.

The figure which shows one Embodiment of the composite material for body surface contact appliances of this invention. (A) is a perspective view of the composite material for body surface contact orthosis of this invention, (b) is a cross-sectional schematic drawing in alignment with the bb line of (a). 3 is a surface photograph of the fiber substrate used in Example 1. FIG. In the figure, the dark black part is a hole. The length of the line segment is 1 cm. The surface photograph of the silicone resin layer of the composite material for body surface contact equipment used in Example 1. FIG. In the drawing, the dark black portion is a through hole of the silicone resin layer. The length of the line segment is 1 cm.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Composite material for body surface contact equipment 2 Fiber base material 3 Silicone resin layer 4 Air hole 5 Through-hole

Claims (7)

  A body surface comprising a fiber base material having a plurality of pores on the surface and a silicone resin layer formed on the fiber base material and having a through hole facing the pores, and having an air permeability of 10 seconds or less Composite material for contact braces. ^2. The body surface contact device according to claim 1, wherein the average cross-sectional area of the pores is 0.04 to ² mm ² on the surface of the fiber base material, and the number of pores is 10 to 500 per 1 cm ^{2 of the} fiber base surface. Composite material.   The composite material for body surface contact orthosis according to claim 2, having a tension at 50% elongation of 0.5 to 30 N / 25 mm and an elongation ratio at 5 N load of 20 to 85%.   The composite material for body surface contact device according to any one of claims 1 to 3, wherein the silicone resin layer contains a silicone oil having a weight average molecular weight of 30,000 to 200,000. It consists of a fiber base material having a plurality of pores on the surface and a silicone resin layer having a through hole facing the pores formed thereon, and the average cross-sectional area of the pores is 0 on the fiber base surface. 0.04 to ² mm ² , the number of pores is 10 to 500 per 1 cm ^{2 of the} fiber substrate surface, the silicone resin layer contains a silicone oil having a weight average molecular weight of 30,000 to 200,000, and the ventilation A composite material for body surface contact orthosis having a degree of 10 seconds or less.   A body surface contact device comprising the composite material for body surface contact device according to any one of claims 1 to 5.   The body surface contact device according to claim 6, wherein the body surface contact device is a sleeve-like bandage for lowering the artificial limb.