Biaxially stretched polyamide film
AssigneeToyobo Co., Ltd.
InventorsKazushige Ueda, Takamichi Goto, Takuro Endo
Life of this patent
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Abstract
It is provided that a biaxially stretched polyamide film that has excellent resistance to pinhole formation due to bending, has excellent resistance to pinhole formation due to repeated contact, has excellent piercing resistance, and further can suppress generation of foreign matter during film formation. A biaxially stretched polyimide 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) contains at least (a) 70 to 99% by mass of a polyamide 6 resin, and (b) 1 to 20% by mass of an aliphatic or aromatic-aliphatic polyester resin, and the functional layer (layer B) contains at least 70% by mass or more of a polyamide 6 resin.
Claims9
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.
Dependencies are inferred from the claim text.