Coinjection stretch blow molded container

Details Coinjection stretch blow molded container Coinjection stretch blow molded container

B - Operations, Transporting

29

C

B29C 49/22 (2006.01) B29C 49/00 (2006.01) B32B 27/08 (2006.01) B32B 27/36 (2006.01) B65D 1/02 (2006.01) B29C 49/06 (2006.01)

Patent

CA 2267878

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 (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.

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