Resin-coated metal sheet for container
AssigneeJfe Steel Corporation
InventorsYuya Kawai, Junichi Kitagawa, Yasuhide Oshima, Katsumi Kojima
Life of this patent
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Abstract
A resin-coated metal sheet for a container includes: a metal sheet; a first resin coating layer provided on an inner face of the metal sheet after forming; and a second resin coating layer provided on an outer face of the metal sheet after forming, wherein a polar component of surface free energy of the second resin coating layer is 3.5 mN/m or more, after the second resin coating layer is subjected to heat treatment at a melting point of the second resin coating layer plus 8° C. for 2 minutes, and a static friction coefficient of the second resin coating layer, at 145° C., is 0.16 or less.
Claims17
A resin-coated metal sheet for a container, comprising:
- a metal sheet;
- a first resin coating layer provided on an inner face of the metal sheet;
- and
- a second resin coating layer provided on an outer face of the metal sheet, wherein
- a polar component of surface free energy of the second resin coating layer is 3.6 mN/m to 5.2 mN/m, after the second resin coating layer is subjected to heat treatment at a melting point of the second resin coating layer plus 8° C. for 2 minutes, and
- a static friction coefficient of the second resin coating layer, at 145° C., is 0.16 or less.
A resin-coated metal sheet for a container, comprising:
- a metal sheet;
- a first resin coating layer provided on an inner face of the metal sheet;
- and
- a second resin coating layer provided on an outer face of the metal sheet,
- the second resin coating layer containing:
- polyester resin having a melting point of 230° C. to 254° C. as a main component;
- and
- 0.010% by mass to 1.0% by mass of a lubricant component, the lubricant component being an acid-modified polyolefin or an oxidized polyolefin and has a weight average molecular weight of 2,500 or more and less than 80,000 and an acid value of 1.0 mg KOH/g to 100 mg KOH/g.
Dependencies are inferred from the claim text.