	US 11,794,456 B2
	Laminated stretched polyamide film
Takuro Endo, Inuyama (JP); and Kosuke Hama, Inuyama (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 17/441,191
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Mar. 10, 2020, PCT No. PCT/JP2020/010311 § 371(c)(1), (2) Date Sep. 20, 2021, PCT Pub. No. WO2020/195795, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-063701 (JP), filed on Mar. 28, 2019.
Prior Publication US 2022/0153007 A1, May 19, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 27/34 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01)

CPC B32B 27/34 (2013.01) [B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2270/00 (2013.01); B32B 2307/518 (2013.01); B32B 2307/558 (2013.01); B32B 2307/7265 (2013.01); B32B 2307/732 (2013.01); B32B 2439/46 (2013.01)]

20 Claims

1. A laminated stretched polyamide film that is a biaxially stretched polyamide film comprising three layers including layer B, layer A: a base layer, and layer C in this order, wherein

the layer A contains not lower than 65% by mass of polyamide 6,

the layer B contains 0 to 40% by mass of polyamide 6 and 60 to 100% by mass of a polyamide 6 copolymer in which a ratio of a copolymerization component in the copolymer is 3 to 35% by mass, and

the layer C contains not lower than 70% by mass of polyamide 6 and 0.05 to 1% by mass of fine particles having an average particle diameter of 0.1 to 10 μm.