发明名称 |
METHOD OF MANUFACTURING EASILY OPENABLE CAN LIDS OF RESIN LAMINATED METAL PLATE, EASILY OPENABLE CAN LID, AND RESIN LAMINATED METAL PLATE FOR EASILY OPENABLE CAN LIDS. |
摘要 |
<p>A method of manufacturing an easily openable can lid of a resin laminated metal plate, consisting of the steps of subjecting a resin laminated metal plate for easily openable can lids, which is composed of a metal plate or a surface-treated metal plate one or both surfaces of which are laminated with a crystalline saturated polyester resin film of a thickness of 10-100 mu m, elongation of not less than 150 % and crystal melting heat at a crystallinity of not more than 10 % of not less than 10 joule/g to composite extrusion molding using upper and lower metal molds having a radius of round shoulders of 0.1-1.0 mm so as to form a cut guide groove of a thickness of its remaining uncut bottom portion of not more than 1/2 of the thickness of the raw metal plate, and thereafter heat treating the crystalline saturated polyester resin layer around the cut guide groove at a temperature not lower than the cold crystallization starting temperature and lower than the melting point thereof; and easily openable can lid obtained by this method; and a resin laminated metal plate used to obtain the can lid. <IMAGE></p> |
申请公布号 |
EP0630703(A1) |
申请公布日期 |
1994.12.28 |
申请号 |
EP19940903057 |
申请日期 |
1993.12.24 |
申请人 |
NIPPON STEEL CORPORATION |
发明人 |
NISHIDA, HIROSHI, NIPPON STEEL CORPORATION;OYAGI, YASHICHI, NIPPON STEEL CORPORATION;NAKAMURA, KIYONORI, NIPPON STEEL CORPORATION |
分类号 |
B21D51/38;(IPC1-7):B21D51/44;B32B15/08 |
主分类号 |
B21D51/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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