US 12,391,827 B2
Biaxially stretched polyamide film
Kazushige Ueda, Inuyama (JP); Takamichi Goto, Inuyama (JP); and Takuro Endo, Inuyama (JP)
Assigned to TOYOBO CO., LTD., Osaka (JP)
Appl. No. 17/906,313
Filed by TOYOBO CO., LTD., Osaka (JP)
PCT Filed Mar. 24, 2021, PCT No. PCT/JP2021/012304
§ 371(c)(1), (2) Date Sep. 14, 2022,
PCT Pub. No. WO2021/200489, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. 2020-060681 (JP), filed on Mar. 30, 2020; application No. 2020-097913 (JP), filed on Jun. 4, 2020; and application No. 2020-122061 (JP), filed on Jul. 16, 2020.
Prior Publication US 2023/0340261 A1, Oct. 26, 2023
Int. Cl. C08L 77/06 (2006.01); B32B 1/00 (2024.01); B32B 27/08 (2006.01); B32B 27/18 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B65D 65/40 (2006.01); C08J 5/18 (2006.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); C09J 177/06 (2006.01)
CPC C08L 77/06 (2013.01) [B32B 1/00 (2013.01); B32B 27/08 (2013.01); B32B 27/18 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B65D 65/40 (2013.01); C08J 5/18 (2013.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); C09J 177/06 (2013.01); B32B 2250/24 (2013.01); B32B 2250/40 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2270/00 (2013.01); B32B 2307/414 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/558 (2013.01); B32B 2307/581 (2013.01); B32B 2439/06 (2013.01); B32B 2439/70 (2013.01); C08J 2377/06 (2013.01); C08J 2467/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A biaxially stretched polyamide film comprising a functional layer (layer B) laminated on at least one surface of a base layer (layer A), wherein
the base layer (layer A) consists of, as a resin, (a) 70 to 99% by mass of a polyamide 6 resin, (b) 1 to 20% by mass of an aliphatic or aromatic-aliphatic polyester resin, and (c) optionally a polyamide resin other than the polyamide 6 resin,
the polyamide resin other than the polyamide 6 resin, when present, is a polyamide resin selected from a polyamide 11 resin, a polyamide 410 resin, a polyamide 610 resin, a polyamide 1010 resin, a polyamide 12 resin, a polyamide 66 resin, a polyamide 6/12 copolymer resin, a polyamide 6/66 copolymer resin, a polyamide MXD6 resin, a polyamide MXD10 resin, and a polyamide 11/6T copolymer resin, and
the functional layer (layer B) contains at least 70% by mass or more of a polyamide 6 resin.