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AssigneesDaiwa Can Company, Kansai Paint Co., Ltd.
InventorsMichiyuki Kakimoto, Ryuichi Eguchi, Atsushi Kobayashi, Tadashi Nishimoto, Shozo Iseki, Tsutomu Maruyama
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An electron radiation curing type adhesive which is excellent for adhesion between a polyester film and a metal material, and which is excellent in retort resistance or the like where the adhesive is used for food cans. There is also disclosed a metal plate laminated with a polyester film. The electron radiation curing type adhesive is composed of a resin composition in which 2 to 200 weight part of polyester group oligomer having unsaturated double-bonds, with respect to 100 weight parts of polyester resin, has added thereto 0.5 to 250 PHR of a stress relaxation agent. The polyester film and a metal plate are laminated with each other by means of the above-mentioned adhesive, and then the film and the metal plate are bonded together by heating and curing the adhesive by irradiation using electron radiation.
An electron radiation curing adhesive composition comprising 0.5 to 250 PHR of a stress relaxation agent, and a resin composition having 0.3 to 5.0 mol/kg molecule of polymeric unsaturated double-bonds, said resin composition containing 100 weight parts of a thermoplastic polyester resin having a number-average molecular weight of 7,000 to 40,000 blended with 2 to 200 weight parts of a polyester group oligomer having a number-average molecular weight of 300 to 5,000.
A polyester film laminated metal plate for cans comprising a polyester film laminated over at least one surface of a metal plate by an electron radiation curing adhesive in which 0.5 to 250 PHR of a stress relaxation agent is added to a resin composition having 0.3 to 5.0 mol/kg molecule of polymeric unsaturated double-bond, and containing 100 weight parts of a thermoplastic polyester resin having a number-average molecular weight of 7,000 to 40,000, and 2 to 200 weight parts of polyester group oligomer having a number-average molecular weight of 300 to 5,000.
Dependencies are inferred from the claim text.