Patent ID: 10016962

Abstract:
The multilayer structure includes a polyamide resin layers (A) and (B), wherein the layer (A) is composed of a polyamide resin (A1) containing at least any constituent unit of a constituent unit derived from a lactam having from 10 to 12 carbon atoms and a constituent unit derived from an aminocarboxylic acid having from 10 to 12 carbon atoms, or a composition (a) containing the resin (A1), the layer (B) is composed of a composition (b) containing a polyamide resin (B1) in which a diamine unit thereof includes a constituent unit derived from a metaxylylenediamine in an amount of 70 mol % or more and a dicarboxylic acid unit thereof includes a constituent unit derived from an aliphatic dicarboxylic acid having from 4 to 8 carbon atoms in an amount of 70 mol % or more, and a polyamide resin (B2) in which a diamine unit thereof includes a constituent unit derived from a xylylenediamine in an amount of 70 mol % or more and a dicarboxylic acid unit thereof includes a constituent unit derived from an aliphatic dicarboxylic acid having from 9 to 12 carbon atoms in an amount of 70 mol % or more, and the ratio by mass (B1/B2) is from 55/45 to 85/15.