KOSPRITZGEGOSSENER, STRECKGEBLASENER BEHÄLTER

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: 25 ‰¤ ETb ‰¤ 48 92 ‰¤ SDb ‰¤ 99 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.