Stretch blow receptacle and molding method of the same

Details Stretch blow receptacle and molding method of the same Stretch blow receptacle and molding method of the same

2005-05-10

2005-05-10

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

C428S035700, C428S036910, C428S156000, C428S213000, C428S218000, C428S220000, C264S520000, C264S521000, C264S532000

Reexamination Certificate

active

06890621

ABSTRACT:
Improve the strength of the stretch blow receptacle and make the heat resistant treatment easier, by making the receptacle wall cross-section multi-layered in view of crystalline density, and the crystalline density of the surface layer high density. The inventions concerns a thin plastic receptacle2molded by stretch blowing of a bottomed preform1in the longitudinal and transversal directions. The wall cross-section is composed of inside and outside surface layers2awhose crystalline density is high by stretching, a core layer2bpresenting a lower density than the surface layers2a, and an intermediate layer2cpresenting a graduated density between both layers2a,2b.

REFERENCES:
patent: 3864444 (1975-02-01), Johnson
patent: 5364585 (1994-11-01), Takeuchi
patent: 6139934 (2000-10-01), Hettinga
patent: 4-214322 (1992-08-01), None
patent: 5-131529 (1993-05-01), None
patent: 2000-43130 (2000-02-01), None

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