JP2957119B2 - Non-slip sheet made of silicone rubber with grain and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a non-slip sheet made of a silicone rubber with a grain and a method of producing a non-slip sheet made of a silicone rubber with a grain. The present invention relates to a non-slip sheet and a method for manufacturing the same.

[0002]

2. Description of the Related Art A silicone-based non-slip sheet using a vulcanized silicone resin layer or a silicone rubber-like layer is used as a slip prevention for electric and electronic parts which are required to be easily fixed and easily peeled. It is often used.

[0003] Such a silicone-based non-slip sheet has conventionally been produced by directly laminating a silicone resin composition or a rubber-like material on a substrate by coating or the like and vulcanizing the same. For this reason, the silicone resin layer or the silicone rubber layer becomes a mirror surface, and when the silicone resin layer or the silicone rubber layer is used for non-slip, there is a disadvantage that the silicone resin layer or the silicone rubber layer comes into close contact with the other party.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned points, and has an embossed silicone rubber non-slip sheet which can be made uneven by providing an uneven surface to prevent adhesion and can be produced by coating, as compared with the prior art, and its production. The aim is to provide a method.

[0005]

Means for Solving the Problems In order to solve the above problems, a non-slip sheet made of embossed silicone rubber according to the present invention is formed by peeling off an embossed release sheet provided with a polyolefin-based release agent. And a base material provided with a silicone-based pressure-sensitive adhesive layer interposed therebetween.

The method for producing a non-slip sheet made of embossed silicone rubber according to the present invention comprises a step of applying a silicone rubber composition onto an embossed release sheet provided with a polyolefin-based release agent and polymerizing the same. Applying a silicone pressure-sensitive adhesive layer to the release sheet and bonding a silicone rubber layer formed on the release sheet so that the silicone rubber composition layer and the silicone pressure-sensitive adhesive layer face each other; The method includes a step of peeling the mold sheet.

According to the present invention, since the silicone rubber layer is formed by using a release sheet with a grain, a non-mirror, non-slip sheet made of a silicone rubber with a grain has an uneven surface. Has the advantage that it does not adhere to the other party. Further, according to the method for producing a non-slip sheet made of a silicone rubber with a grain according to the present invention, a release sheet having a grain coated with a silicone adhesive applied to a substrate and a polyolefin-based release agent prepared in advance is provided. Since a silicone rubber layer is formed on top of each other, a non-slip sheet made of embossed silicone rubber can be manufactured without the need for a separator. There is an advantage that can be provided.

[0008]

DETAILED DESCRIPTION OF THE INVENTION As shown in FIG. 1, a non-slip sheet made of a silicone rubber with a grain is provided with a silicone rubber layer 2 provided on a release sheet 1 with a grain as shown in FIG. The product B provided with the agent layer 4 is attached so that the silicone rubber layer 2 and the pressure-sensitive adhesive layer 4 face each other. Then, the release sheet 1 with the grain is peeled off and the grain 7
(See FIGS. 2 and 3).

According to a second embodiment of the non-slip sheet made of embossed silicone rubber according to the present invention, as shown in FIG. 2, a silicone rubber layer having a smooth surface is provided on the opposite surface of the base material with an adhesive layer 5 interposed therebetween. 6 can also be provided.

[0010] According to the third non-slip sheet made of silicone rubber with a grain according to the present invention, as shown in FIG.
Instead of the smooth silicone rubber layer 6 in the embodiment, an acrylic resin layer or a silicone adhesive layer 8 can be provided.

The release sheet according to the present invention as described above,
This is a release sheet with a grain using a polyolefin-based release agent. Generally, a silicone-based release agent is used as the release agent, but in the present invention, a polyolefin-based release agent is used because the release agent is separated from the silicone rubber layer. This is because if it is a silicone release agent, it will react during polymerization of the silicone rubber or vulcanization of the peroxide, making peeling difficult.

Examples of the polyolefin-based release agent include polypropylene, polyethylene and the like. A release sheet obtained by coating the above-mentioned polyolefin-based release agent on a synthetic resin film, paper or the like can be used. it can.

As the silicone rubber applied to such a release sheet, a silicone polymer conventionally used as a non-slip sheet of this kind can be effectively used. For example, a peroxide-cured silicone polymer and an addition-polymerized silicone polymer can be used. Examples of peroxides used in the peroxide vulcanization type include monochlorobenzoyl peroxide and dichlorobenzoyl peroxide, and addition polymerization type silicone resins include those polymerized by a platinum catalyst.

The thickness of the silicone resin layer 2 as described above is preferably 0.15 to 0.35 mm.
If it is less than 0.15 mm, it is difficult to form the grain 7. On the other hand, if it exceeds 0.35 mm, handling becomes difficult.

Further, as the substrate 3, a substrate conventionally used as a non-slip substrate of this type can be effectively used. For example, a film or sheet such as PET, PPT, Kapton, polyethylene fluoride, polyvinyl fluoride or woven fabric can be effectively used.

The pressure-sensitive adhesive is applied to such a substrate, and the pressure-sensitive adhesive may be basically any as long as it can transfer the substrate and the silicone resin layer 2. As such a silicone-based pressure-sensitive adhesive, for example, there is a pressure-sensitive pressure-sensitive adhesive. Generally, it is composed of a low molecular weight adhesive substance, a high molecular weight film forming substance, a filler, a plasticizer, and the like.

The thickness of the pressure-sensitive adhesive layer is preferably from 50 to 100 μm. If the thickness is less than 50 μm, the adhesion may not be sufficient. On the other hand, if the thickness is more than 100 μm, processing takes time and disadvantages such as displacement of the pressure-sensitive adhesive are caused. May occur.

The grain of the grained silicone rubber non-slip sheet having the above-described structure can be provided with a non-slip property by selecting a mold release sheet having a different grain density or grain depth depending on the application. Can be adjusted. The density and depth of the grain can be expressed by measuring the surface roughness, and the anti-slip property can be grasped by measuring the frictional force.

The present invention provides a method for producing the above-mentioned non-slip sheet made of silicone rubber with a grain.

As shown in FIG. 4, the release sheet roll R1
The silicone rubber composition 10 is applied by a doctor knife 9 or the like onto the embossed release sheet 1 provided with the polyolefin-based release agent wound on the mold. Thereafter, the coating material enters the heating chamber 11, is polymerized and cured, and is taken up by the winding roll R.
2 is wound up. Since the rate of curing or vulcanization of the silicone rubber composition is sufficiently high, it is not necessary to insert and wind up a device such as a separator, and the production cost can be reduced.

After the cured product A provided with the cured silicone rubber layer 2 on the release sheet 1 is set on the silicone rubber sheet roll R3 of FIG. 5, the base material 3 wound on the base material roll R4 is used. Is coated with a silicone adhesive 4 by a doctor knife 9 and heated in a heating chamber 12 to disperse the solvent. Then, the silicone rubber layer 2 is provided on the release sheet 1 set on the silicone rubber sheet roll R3. The release sheet A is adhered and the release sheet 1 is peeled off by a release sheet take-up roll R5, and the anti-slip sheet from which the release sheet has been peeled off is taken up by a take-up roll R6.

As described above, in the present invention, the silicone rubber layer is adhered to the silicone-based pressure-sensitive adhesive layer at the same time or with little time when the silicone-based pressure-sensitive adhesive is applied to the substrate. For this reason, it is not necessary to provide a separator in the pressure-sensitive adhesive layer, and the production cost can be reduced.

The vulcanization temperature of the heating chamber 11 is preferably 120 to 160 ° C. When the temperature is lower than 120 ° C., the silicone rubber layer may not be sufficiently vulcanized. On the other hand, when the temperature exceeds 160 ° C., some of the substrates and films used for the release sheet may deteriorate.

Further, the vulcanization time is preferably 2 minutes to 10 minutes. If the time is less than 2 minutes, the vulcanization may not be sufficient. On the other hand, if the time exceeds 10 minutes, the base or the film used for the release sheet may deteriorate.

Such a series of steps can be continuously performed by using a long release sheet and a base material.

[0026]

EXAMPLE A release sheet (AR-7; trade name; Asahi Roll Co., Ltd.) coated with polypropylene was coated with a silicone rubber composition (KE-1,935; trade name; Shin-Etsu Chemical Co., Ltd.) to a thickness of 150 μm. And 133
Polymerization was performed at 4 ° C. for 4 minutes.

This is set on a silicone rubber roll R3 shown in FIG. 5, and a solvent-soluble silicone-based pressure-sensitive adhesive (KR-120; trademark) is used on a 50 μm thick polyester film (Lumilar; trade name; Toray Industries, Inc.) as a base material. (Shin-Etsu Chemical Co., Ltd.) was applied to a thickness of 55 μm, and the solvent was scattered.

[0028]

As described above, according to the non-slip sheet made of silicone rubber with a grain according to the present invention and the method of manufacturing the same, the silicone rubber layer is formed using the release sheet with the grain. A non-mirror, non-slip sheet made of embossed silicone rubber having an uneven surface can be provided, which is advantageous in that it does not adhere to the mating side. Further, according to the method for producing a non-slip sheet made of a silicone rubber with a grain according to the present invention, a mold having a grain coated with a silicone-based pressure-sensitive adhesive applied on a substrate and a polyolefin-based mold release agent prepared in advance is provided. Since the sheet with the silicone rubber layer formed on the sheet is adhered to each other, a non-slip sheet made of embossed silicone rubber can be manufactured without the need for a separator. There is an advantage that a sheet can be provided. Further, it can be used as a non-slip for a cooking table, a table cloth, a non-slip for wind surfing, surfing, and a non-slip sheet for a computer keyboard, which require high-temperature heat treatment.

Further, it is possible to adjust the anti-slip property by selecting the grain density and the grain depth of the release sheet.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a configuration example of a non-slip sheet made of a silicone rubber with a grain according to the present invention.

FIG. 2 is a cross-sectional view of another example of the configuration of the non-slip sheet made of embossed silicone rubber according to the present invention.

FIG. 3 is a cross-sectional view of another configuration example of a non-slip silicone rubber sheet with a grain according to the present invention.

FIG. 4 is an explanatory view for explaining a method for producing a non-slip sheet made of embossed silicone rubber according to the present invention.

FIG. 5 is an explanatory view for explaining a method of manufacturing a non-slip sheet made of silicone rubber with a grain according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 release sheet with grain 2 silicone rubber layer 3 base material 4 silicone-based pressure-sensitive adhesive layer 5 pressure-sensitive adhesive layer

Claims (2)

(57) [Claims] 1. A silicone rubber layer formed by peeling off a release sheet with a grain provided with a polyolefin-based release agent,
An embossed silicone rubber non-slip sheet comprising a substrate provided with a silicone-based pressure-sensitive adhesive layer interposed therebetween. 2. A step of applying and polymerizing a silicone rubber composition on a textured release sheet provided with a polyolefin release agent, applying a silicone pressure-sensitive adhesive layer to a base material, and Bonding a silicone rubber layer formed on the silicone rubber composition layer and the silicone-based pressure-sensitive adhesive layer so that they face each other, and peeling off the release sheet. Manufacturing method of rubber non-slip sheet.