Method for producing pressure-sensitive adhesive sheet having ultraviolet-ray curing-type acrylic pressure-sensitive adhesive layer

A manufacturing method and a technology for an adhesive layer, which are applied in the directions of adhesives, ester copolymer adhesives, graft polymer adhesives, etc., can solve the problems of low adhesion force on rough surfaces, long polymerization reaction time, and poor productivity. , to achieve the effect of broadening the molecular weight distribution, excellent productivity, and preventing the reduction of adhesion

Inactive Publication Date: 2013-07-17
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned method does not solve the problem of low adhesion to rough surfaces. In addition, since low-intensity ultraviolet rays are irradiated until most of the polymerization reaction is completed, compared with the case of irradiating high-intensity ultraviolet rays, there will be a polymerization reaction. The problem of long time and poor productivity

Method used

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  • Method for producing pressure-sensitive adhesive sheet having ultraviolet-ray curing-type acrylic pressure-sensitive adhesive layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] (Preparation of UV-curable acrylic adhesive composition)

[0077] After adding 0.04 parts by weight of 1,6-hexanediol diacrylate to 100 parts by weight of the above-mentioned acrylic polymer slurry 1, this was uniformly mixed to prepare an ultraviolet curable acrylic adhesive composition.

[0078] (Preparation of adhesive sheets)

[0079] On the peeled surface of a 38 μm thick polyester film (trade name: MRF, manufactured by Mitsubishi Chemical Polyester Co., Ltd.) that has been peeled with silicone on one side, apply the above-mentioned ultraviolet-curable acrylic adhesive with an applicator. agent composition to form a coating layer with a final thickness of 60 μm. After that, a polyester film (trade name: MRN, manufactured by Mitsubishi Chemical Polyester Co., Ltd.) with a thickness of 38 μm, which was treated with silicone on one side and manufactured by Mitsubishi Chemical Polyester Co., Ltd., was covered on the surface coated with the ultraviolet curable acrylic ...

Embodiment 2

[0081] The ultraviolet lamp is an LED lamp (trade name: LC-L5, manufactured by Hamamatsu Hotonics Co., Ltd.) with a peak wavelength of 365 nm, and the irradiation light amount of ultraviolet rays for one transfer is 600 mJ / cm 2 , repeat this transfer 10 times, so that the amount of ultraviolet radiation is 6000mJ / cm 2 , except that, it carried out similarly to Example 1, and produced the adhesive sheet.

Embodiment 3

[0083] The acrylic polymer slurry 1 was changed to the acrylic polymer slurry 2, the ultraviolet lamp was set to a metal halide lamp (manufactured by Harison Toshiba Lighting Co., Ltd.), and the irradiation light amount of ultraviolet rays for one transfer was 600 mJ / cm 2 , repeat this transfer 10 times, so that the amount of ultraviolet radiation is 6000mJ / cm 2 , except that, it carried out similarly to Example 1, and produced the adhesive sheet.

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Abstract

Provided is a method for producing an pressure-sensitive adhesive sheet having an ultraviolet-ray curing-type acrylic pressure-sensitive adhesive layer that can undergo, about one or more monomers therefor, high rate-polymerization to be excellent in productivity, and is also excellent in balance between pressure-sensitive adhesive performances. The method includes: applying, onto a substrate, an ultraviolet-ray curing-type acrylic pressure-sensitive adhesive composition including a photopolymerization initiator, and a monomer-component set that is / includes an alkyl (meth)acrylate; and radiating ultraviolet rays to the composition, thereby curing the composition to form a pressure-sensitive adhesive layer. In the method, the irradiance of the rays radiated in the pressure-sensitive adhesive layer forming step is 25 mW / cm<2> or more. When the radiation dose of the radiated ultraviolet rays is 600 mJ / cm<2> and is 2,400 mJ / cm<2>, the polymerization rate of the monomer-component set is 30% or less, and 70% or more, respectively.

Description

[0001] technology area [0002] The present invention relates to a method for producing an adhesive sheet having an ultraviolet-curable acrylic adhesive layer. Background technique [0003] Conventionally, an acrylic adhesive has been prepared by solution-polymerizing a monomer component mainly composed of an alkyl acrylate. An adhesive sheet having an adhesive layer is produced by applying a solvent-based adhesive to a base material and drying it. [0004] In recent years, in consideration of air pollution and environmental problems, a method of photopolymerizing the above-mentioned monomer components with ultraviolet rays to produce an adhesive sheet having an acrylic adhesive layer has been known. This method is particularly advantageous in terms of safety and the environment because the adhesive sheet can be produced without using a solvent. [0005] As a production method for producing an adhesive sheet or adhesive tape (hereinafter referred to as "adhesive sheet") by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/02C09J7/04C09J151/00
CPCC09J133/08C09J7/0207B05D3/067C09J7/0217C08F2/48B05D5/10C09J2201/622C09J2205/31C09J7/385C09J2301/312C09J2301/416
Inventor 秋山淳福永元
Owner NITTO DENKO CORP
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