| abstract |
Coinjection stretch blow molded containers containing 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: n 25≦ETb≦48 (1) n 92≦SDb≦99 (2) n 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. |