Coinjection stretch blow molded container

摘要

Coinjection stretch blow molded containers comprising a thermoplastic polyester resin and an EVOH resin are obtained, which have greatly improved impact delamination resistance. The containers comprise a thermoplastic polyester layer (layer a) and an ethylene-vinyl alcohol copolymer layer (layer b), with the layer a being kept in direct contact with the both surfaces of the layer b, wherein the ethylene-vinyl alcohol copolymer satisfies the following formulae (1) and (2) and its differential scanning calorimetry (DSC) gives a single peak for crystal fusion: $$ $ wherein\; ETb\; indicates\; the\; ethylene\; content\; (mol\%)\; of\; the\; ethylene-vinyl\; alcohol\; copolymer,\; and\; SDb\; indicates\; the\; degree\; of\; saponification\; (\%)\; of\; the\; ethylene-vinyl\; alcohol\; copolymer.$$$