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 e) 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 (1) 92 ~ SDb ~ 99 (2) 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.