Parison and blow-molded containers and processes for...

B - Operations – Transporting – 29 – C

Patent

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Details

18/514, 18/687,

B29C 49/22 (2006.01) B29C 45/16 (2006.01) B32B 27/08 (2006.01) B65D 1/02 (2006.01) B65D 1/40 (2006.01) B29C 49/00 (2006.01) B29C 49/06 (2006.01)

Patent

CA 1288912

Abstract of the Disclosure A parison, as a precursor of a container, composed at least of a thermoplastic resin (resin A) and another thermoplastic resin having excellent gas-barrier property (resin B) and containing a multilayered resin layer at least in an intermediate layer between an outer- most layer and an innermost layer each composed of resin A at parts other than the open end part of the mouth portion of the parison, or wholly in the parison, said multilayered resin layer being formed by using an injec- tion-molding machine equipped with a static mixing-stir- ring device provided in a nozzle portion of an injection cylinder, or in a mold, or in a resin flow passage between the nozzle portion and a mold, and injecting the resins A and B through the static mixing-stirring device so that flows of the resins A and B are divided in a plurality of thin layers parallel to the flowing direction; and a process for production thereof. A container obtained by biaxially stretching and blow-molding the said parison has excellent transparency, gas-barrier property and mechanical strength.

558054

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