Gas-barrier multi-layer structure

摘要

A gas-barrier multi-layer structure comprises gas-barrier layer(s) A and thermoplastic resin layer(s) B. The gas-barrier layer A comprises a crystallizable polyamide resin produced by polycondensing a diamine component containing >=70 mole% m-xylylenediamine with a dicarboxylic acid component containing 80-97 mole% 4-20C alpha ,omega -linear aliphatic dicarboxylic acid and 3-20 mole% isophthalic acid. A gas-barrier multi-layer structure comprises gas-barrier layer(s) A and thermoplastic resin layer(s) B. The gas-barrier layer A comprises a crystallizable polyamide resin produced by polycondensing a diamine component containing >=70 mole% m-xylylenediamine with a dicarboxylic acid component containing 80-97 mole% 4-20C alpha ,omega -linear aliphatic dicarboxylic acid and 3-20 mole% isophthalic acid. The crystallizable polyamide resin has a minimum half crystallization time of 40-2000 seconds in a measuring temperature range from a glass transition point to less than a melting point when measured by isothermal crystallization according to depolarization photometry.