Method for molding multi-layered vessels

Details Method for molding multi-layered vessels Method for molding multi-layered vessels

1986-12-12

1988-09-27

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

2643288, 264255, 425130, B29C 4516, B29C 4520

Patent

active

047740477

ABSTRACT:
A method of forming a multi-layered vessel by injection molding a multi-layered parison and subsequently blow-molding the parison to form the multi-layered vessel. The parison is formed having inner and outer wall layers and an intermediate gas barrier layer. The intermediate layer is positioned between the inner and outer wall layers such that the ratio of the wall thickness of the outer layer to that of the inner layer is most preferably in the range of 1:3.50.

REFERENCES:
patent: 4525134 (1985-06-01), McHenry et al.
patent: 4609516 (1986-09-01), Krishnakumar et al.

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