Parison and blow-molded container and processes for production t

Details Parison and blow-molded container and processes for production t Parison and blow-molded container and processes for production t

1989-08-15

1991-02-19

Seidleck, James

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

215 16, 215 121, 4284244, 4284752, 428480, 4285428, B65D 100

Patent

active

049943138

ABSTRACT:
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 outermost 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 injection-molding machine equipped with a static mixing-stirring 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.

REFERENCES:
patent: 4501781 (1985-02-01), Kushida
patent: 4535901 (1985-08-01), Okudaira et al.
patent: 4550043 (1985-10-01), Beck
patent: 4564541 (1986-01-01), Taira et al.
patent: 4728549 (1988-03-01), Shimizu et al.
Patent Abstracts of Japan, vol. 11, No. 135 (M-585) [2582], Apr. 28, 1987, Abstract of JP-A-61 274 912.

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