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Method For Manufacturing Pressure-sensitive Adhesive Sheet Having Ultraviolet-curable Pressure-sensitive Acrylic Adhesive Agent Layer

A manufacturing method and adhesive layer technology, applied in the direction of non-polymer organic compound adhesives, film/sheet adhesives, adhesives, etc., can solve problems such as poor productivity and long polymerization reaction time, and achieve production Excellent properties, suppression of low molecular weight, and effects of preventing reduction in cohesive force

Inactive Publication Date: 2014-10-15
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above method, low-intensity ultraviolet rays are irradiated until most of the polymerization reaction is completed, so compared with the case of irradiating high-intensity ultraviolet rays, the problems of long polymerization reaction time and poor productivity cannot be solved.

Method used

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  • Method For Manufacturing Pressure-sensitive Adhesive Sheet Having Ultraviolet-curable Pressure-sensitive Acrylic Adhesive Agent Layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] (Preparation of ultraviolet curable acrylic adhesive composition)

[0089] 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, the mixture was uniformly mixed to prepare an ultraviolet curable acrylic adhesive composition.

[0090] (production of adhesive sheet)

[0091] On the peeled surface of a polyester film (trade name: MRF, manufactured by Mitsubishi Chemical Polyester Co., Ltd.) with a thickness of 38 μm that has been peeled with silicone on one side, the above-mentioned ultraviolet-curable acrylic film was coated with an applicator. An adhesive composition was used to achieve a final thickness of 60 μm to form a coating layer. After that, a polyester film (trade name: MRN, Mitsubishi Chemical Polyester Co., Ltd. system), so that the release-treated surface of the film was the coating layer side. Thereby, the coating layer of the ultraviolet curable acrylic pressure-sensitive ad...

Embodiment 2

[0093] The bright period time is 0.2 seconds, and the dark period time is 0.2 seconds. Repeat this light-dark cycle until the total light exposure reaches 1500mJ / cm 2 , thereby photopolymerizing the monomer components contained in the above-mentioned ultraviolet curable acrylic pressure-sensitive adhesive composition to obtain a polymer with a polymerization rate of 91%. Then, it dried in 130 degreeC environment for 90 second, and obtained the adhesive sheet of 99% of polymerization rate, it carried out similarly to Example 1, and produced the adhesive sheet.

Embodiment 3

[0095] The bright period time is 0.05 seconds, and the dark period time is 0.5 seconds. Repeat this light-dark cycle until the total light exposure reaches 1500mJ / cm 2 , thereby photopolymerizing the monomer components contained in the above-mentioned ultraviolet curable acrylic pressure-sensitive adhesive composition to obtain a polymer with a polymerization rate of 98%. Then, it dried in 130 degreeC environment for 90 second, and obtained the adhesive sheet of 99% of polymerization rate, it carried out similarly to Example 1, and produced the adhesive sheet.

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Abstract

The present invention provides a method for manufacturing a pressure-sensitive adhesive sheet having an ultraviolet-curable pressure-sensitive acrylic adhesive agent layer that is high in unit light quantity, excellent in productbility and excellent in balance performance of the adhesion properties, such as the retentivity, etc., at a high temperature. The manufacture method comprises a step of coating an ultraviolet-curable pressure-sensitive acrylic adhesive agent composition on a substrate, wherein the ultraviolet-curable pressure-sensitive acrylic adhesive agent composition at least comprises a monomer component containing methacrylic acid alkyl ester and a photopolymerization initiator; a step of curing the ultraviolet-curable pressure-sensitive acrylic adhesive agent composition by irradiating ultraviolet lights to form the adhesive agent layer, wherein an ultraviolet radiator for irradiating the ultraviolet light in the step of forming the adhesive agent layer is an LED lamp, the ultraviolet light irradiates intermittently, and the bright time of irradiating the ultraviolet light is more than 1*10-3 seconds and less than one second, and the dark time of not irradiating the ultraviolet light is 0.1-20 times of the bright time.

Description

technical field [0001] The present invention relates to a method for producing an adhesive sheet having an ultraviolet-curable acrylic adhesive layer. Background technique [0002] Conventionally, an acrylic adhesive has been prepared by solution-polymerizing a monomer component mainly composed of an alkyl acrylate. The pressure-sensitive adhesive sheet having the pressure-sensitive adhesive layer is produced by applying a solvent-based pressure-sensitive adhesive to a base material and drying it. [0003] In recent years, in consideration of air pollution and environmental problems, a method of photopolymerizing the above-mentioned monomer components with ultraviolet light to produce a PSA sheet having an acrylic PSA layer has been known. Since this method can manufacture this adhesive sheet without using a solvent, it is especially advantageous in terms of safety and environment. [0004] As a method for producing an adhesive sheet or adhesive tape (hereinafter referred ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J4/02C09J4/06C08J3/28
CPCC09J4/00C09J7/20
Inventor 秋山淳中岛淳
Owner NITTO DENKO CORP
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