CPC B32B 27/34 (2013.01) [B29C 48/0018 (2019.02); B29C 48/022 (2019.02); B29C 48/21 (2019.02); B29C 55/005 (2013.01); B29C 55/143 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 37/153 (2013.01); B32B 38/0012 (2013.01); B29K 2077/00 (2013.01); B29L 2007/002 (2013.01); B32B 2038/0028 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2264/1021 (2020.08); B32B 2264/303 (2020.08); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/558 (2013.01); B32B 2307/581 (2013.01); B32B 2307/7265 (2013.01); B32B 2307/732 (2013.01); B32B 2439/46 (2013.01); B32B 2439/70 (2013.01); B32B 2553/00 (2013.01)] | 4 Claims |
1. A multilayered stretched polyamide film which is biaxially stretched, and comprises at least three layers composed of a polyamide resin composition and comprising layer B as an easily adhesive layer, layer A as a base layer, and layer C as an easily slippery layer in this order, wherein the film satisfies the following (1) to (6):
(1) the layer A contains 50 to 90% by mass of polyamide 6 and 10 to 50% by mass of a polyamide 6 copolymer in which a ratio of a copolymerization component in the copolymer is 3 to 35% by mass;
(2) the layer B contains 0 to 40% by mass of polyamide 6 and 60 to 100% by mass of the polyamide 6 copolymer in which a ratio of the copolymerization component in the copolymer is 3 to 35% by mass;
(3) the layer C contains 70% by mass or more of polyamide 6 and 0.05 to 1% by mass of fine particles having an average diameter of 0.1 to 10 μm;
(4) the film has tensile strength at break of 150 MPa or more both in MD direction and TD direction;
(5) the film has laminate strength of 3.3 N/15 mm or more; and
(6) the polyamide 6 copolymer contained in the layer B is a polyamide 6/66 copolymer or a polyamide 6-12 copolymer.
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