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发明公开
CN104023974A 层压金属板及食品用罐装容器 有权

层压金属板及食品用罐装容器
摘要：
本发明提供一种层压金属板，其中，形成于容器成型后成为容器外面侧的所述金属板的表面的第一聚酯树脂层以30质量％以上且60质量％以下的比例含有聚对苯二甲酸乙二醇酯或共聚成分的含有率低于6摩尔％的共聚聚对苯二甲酸乙二醇酯，并以40质量％以上且70质量％以下的比例含有聚对苯二甲酸丁二醇酯，形成于容器成型后成为容器内面侧的所述金属板的表面的第二聚酯树脂层为共聚成分的含有率低于14摩尔％的共聚聚对苯二甲酸乙二醇酯，第一及第二聚酯树脂层的残留取向度在2％以上且50％以下的范围内，第一及第二聚酯树脂层层压后的厚度为6μm以上。
摘要（英）：

A first polyester resin layer that is formed on a surface of a metal plate, said surface forming the outer surface of a container after the molding of the container, contains from 30% by mass to 60% by mass (inclusive) of a polyethylene terephthalate or a copolymerized polyethylene terephthalate that has a content of the copolymerization component of less than 6 mol% and from 40% by mass to 70% by mass (inclusive) of a polybutylene terephthalate. A second polyester resin layer that is formed on a surface of the metal plate, said surface forming the inner surface of the container after the molding of the container, is formed of a copolymerized polyethylene terephthalate that has a content of the copolymerization component of less than 14 mol%. The first and second polyester resin layers have a degree of residual orientation within the range of from 2% to 50% (inclusive), and the first and second polyester resin layers have a thickness of 6 mum or more after the lamination.

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