Saturated preform and method for preparation thereof

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

1982-07-19

1984-03-06

McCamish, Marion

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

428910, 4285428, 428 36, 264 50, B65D 8700, B65D 8900, B32B 904

Patent

active

044354533

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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