Lintec Corporation

Daisuke Tomita

Takuo Nishida

A pressure-sensitive adhesive articleincludes a release sheetconstituted from a releasing agent layerand a base material, and a pressure-sensitive adhesive sheetconstituted from a pressure-sensitive adhesive layerand a pressure-sensitive adhesive sheet base. Such a pressure-sensitive adhesive articlehas a structure in which the pressure-sensitive adhesive sheetis laminated on the release sheetso that the pressure-sensitive adhesive layeris in contact with the releasing agent layer. The releasing agent layeris composed of a material containing substantially no silicone compound. The releasing agent layeris mainly composed of an elastomer and has a Young's modulus of 1.5 GPa or less. Preferred examples of the elastomer include polybutadiene rubber (especially, 1,4-polybutadiene rubber), polyisoprene rubber, and ethylene propylene rubber. The release sheethas excellent releasability and has little adverse effect on electric components and the like.

Release sheet and pressure-sensitive adhesive article

There are disclosed a releasing sheet comprising a substrate and a releasing agent layer which is installed by coating the substrate with a releasing agent liquid containing 1,4-polybutadiene and an antioxidant, and irradiating the coated layer with ultraviolet ray so that the layer is cured; and also a releasing sheet comprising in turn a substrate, an undercoat layer which is formed thereon and is composed of an elastic body, and a releasing agent layer which is installed on the undercoat layer by coating the same with a releasing agent liquid containing 1,4-polybutadiene and an antioxidant, and irradiating the layers with ultraviolet ray so that the layers are cured. Being of non-silicone base, the releasing sheets are excellent in releasability from a tacky adhesive agent layer and adhesiveness to the substrate.

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Saitama, Japan

Daisuke Tomita