Easily delaminatable laminate and resin composition for use...

B - Operations – Transporting – 32 – B

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B32B 7/12 (2006.01) B32B 9/00 (2006.01) C09J 7/00 (2006.01) C09J 7/02 (2006.01)

Patent

CA 2359025

A laminate comprising (A) a substrate, (B) an adhesive which is reduced in adhesiveness upon exposure to a type of energy, to render the laminate to be delaminated with ease, and (C) an adhesive which is not reduced in adhesiveness upon exposure to the type of energy, the three types of materials being laminated in the above order; and a resin composition for use in the laminate comprising an epoxy resin and/or a modified silicone resin and a blowing agent. The laminate exhibits high adhesiveness during use, and after use the substrate can be separated from the laminate with ease through irradiating the laminate with the above type of energy.

La présente invention concerne un stratifié comprenant (A) un substrat, (B) un adhésif dont l'adhérence est réduite par une exposition à une énergie d'un type défini, et (C) un adhésif dont l'adhérence n'est pas réduite par l'exposition à l'énergie de ce même type, les trois types de matériaux étant stratifiés dans l'ordre A, B, C ci-dessus. L'invention concerne également une composition de résine convenant à un stratifié fait d'une résine époxy et/ou d'une résine siliconée modifiée, et d'un agent d'expansion. Ce stratifié fait preuve d'un bon pouvoir adhésif pendant l'utilisation, mais après l'utilisation, le substrat se détache facilement du stratifié par exposition à une énergie du type désigné.

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