摘要:
A polyamide resin composition contains a resin component containing at least a polyamide (X) and a fatty acid metallic salt having from 10 to 50 carbon atoms, and contains arbitrarily an additive (A) and/or an additive (B). The polyamide (X) is obtained through melt polycondensation of a diamine component containing 70% by mol or more of m-xylylenediamine and a dicarboxylic acid component containing 70% by mol or more of an ±,É-linear aliphatic dicarboxylic acid. The additive (A) is at least one compound selected from the group consisting of a diamide compound obtained from a fatty acid having from 8 to 30 carbon atoms and a diamine having from 2 to 10 carbon atoms, a diester compound obtained from a fatty acid having from 8 to 30 carbon atoms and a diol having from 2 to 10 carbon atoms, and a surfactant, and the additive (B) is at least one compound selected from the group consisting of a metallic hydroxide, a metallic acetate salt, a metallic alkoxide, a metallic carbonate salt and a fatty acid.
摘要:
A gas-barrier multilayer structure which comprises at least one gas-barrier layer and at least one resin layer. The gas-barrier layer comprises a composite resin (C) comprising: a polyamide resin obtained by condensation-polymerizing m-xylylenediamine and a linear aliphatic α,ω-dicarboxylic acid; and a phyllosilicate treated with an organic swelling agent. The resin layer comprises a thermoplastic resin (D) having a lower glass transition temperature than the composite resin (C). The gas-barrier multilayer structure is obtained by subjecting an unstretched layered product to stretching/thermoforming under specific conditions. The stretching/thermoforming under specific conditions is effective in inhibiting fine cracks which may be present in the resins from causing blushing or a decrease in gas-barrier properties. Thus, a multilayer structure excellent in transparency and gas-barrier properties is obtained.