Saturated preform and method for preparation thereof

Details Saturated preform and method for preparation thereof Saturated preform and method for preparation thereof

1983-06-20

1984-01-17

McCamish, Marion

Stock material or miscellaneous articles

Article of intermediate shape

264 50, 428 35, B32B 904

Patent

active

044264275

ABSTRACT:
Presaturated plastic preforms suitable for use in preparing molecularly oriented hollow articles from thermoplastic materials are obtained by adding controlled amounts of a saturant gas, under pressure, into a molten polymer stream residing in the screw channels of a screw plasticizer in a preform injection molding machine. The polymer so treated is then injected into cooled preform molds to obtain the desired article.

REFERENCES:
patent: 3144493 (1964-08-01), Santelli
patent: 3225127 (1965-12-01), Scott, Jr.

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