Methods of producing oriented high density polyethylene

Details Methods of producing oriented high density polyethylene Methods of producing oriented high density polyethylene

1978-07-24

1980-01-15

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Reshaping running or indefinite-length work

B29C 1702

Patent

active

041838939

ABSTRACT:
In a method of producing uniaxially oriented polymer material, particularly a uniaxially oriented film, from a high density polyethylene, in which the material is put under tension and is drawn from a transverse heated portion with a draw ratio of 5:1 or higher (preferably 7:1 to 20:1), the drawing temperature is selected to be between 80.degree. C. and 110.degree. C., and preferably below 105.degree. C., whereby excellent gas barrier characteristics are obtained in the drawn material.

REFERENCES:
patent: 2547763 (1951-04-01), Land et al.
patent: 3141912 (1964-07-01), Goldman et al.
patent: 3396216 (1968-08-01), Yumoto et al.
patent: 3962205 (1976-06-01), Ward et al.

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