US 12,459,232 B2
Laminated steel sheet for both-sided resin-coated container
Norihiko Nakamura, Tokyo (JP); Yasuhide Oshima, Tokyo (JP); Junichi Kitagawa, Tokyo (JP); Hiroki Nakamaru, Tokyo (JP); and Yoichiro Yamanaka, Tokyo (JP)
Assigned to JFE Steel Corporation, Tokyo (JP)
Appl. No. 15/781,605
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Oct. 21, 2016, PCT No. PCT/JP2016/081294
§ 371(c)(1), (2) Date Jun. 5, 2018,
PCT Pub. No. WO2017/098818, PCT Pub. Date Jun. 15, 2017.
Claims priority of application No. 2015-240141 (JP), filed on Dec. 9, 2015.
Prior Publication US 2020/0262183 A1, Aug. 20, 2020
Int. Cl. B32B 15/09 (2006.01); B32B 15/18 (2006.01); B65D 65/40 (2006.01)
CPC B32B 15/09 (2013.01) [B32B 15/18 (2013.01); B65D 65/40 (2013.01); B32B 2250/04 (2013.01); B32B 2255/06 (2013.01); B32B 2255/26 (2013.01); B32B 2307/704 (2013.01); B32B 2439/00 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A laminated steel sheet for a both-sided resin-coated container, comprising:
a steel sheet;
a first polyester resin layer formed on a surface of the steel sheet serving as an inner side of a container after the container is formed; and
a second polyester resin layer formed on a surface of the steel sheet serving as an outer side of the container after the container is formed,
wherein the first polyester resin layer includes a polyethylene terephthalate content of 100% by weight with no copolymerized component and has a degree of crystallinity in a range of 10% to 25%, and
the second polyester resin layer includes polyethylene terephthalate and polybutylene terephthalate and has a proportion of polybutylene terephthalate in a range of 40% by weight to 80% by weight.