Polyolefin containers having improved gas barrier properties

Details Polyolefin containers having improved gas barrier properties Polyolefin containers having improved gas barrier properties

1977-04-26

1978-07-25

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

260 4256, 260 4257, 260889, 260897C, 264331, B29D 2301

Patent

active

041029747

ABSTRACT:
Polyolefin containers having improved gas barrier properties are prepared by forming a billet comprised of a particle mixture of a polyolefin resin, such as polyethylene, an inorganic filler such as CaCO.sub.3 and at least about 13.5% by volume of a vinylidene chloride polymer having a median particle diameter greater than 150 microns. The billet is heated to a temperature of about 25.degree. to 40.degree. F above the melting temperature of the vinylidene chloride polymer and then molded into a hollow container.

REFERENCES:
patent: 3075946 (1963-01-01), Zupic
patent: 3234313 (1966-02-01), Miller
patent: 3694402 (1972-09-01), Essam
patent: 3891598 (1975-06-01), Marzolf
patent: 3923190 (1975-12-01), Roth
patent: 4012348 (1977-03-01), Chelland

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