Process for producing mono- or biaxially drawn polyketone films

Details Process for producing mono- or biaxially drawn polyketone films Process for producing mono- or biaxially drawn polyketone films

1991-01-11

1991-12-17

Tentoni, Leo 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

264DIG73, B29C 5508, B29C 5512

Patent

active

050733273

ABSTRACT:
Processes for producing mono- and biaxially drawn polyketone films from linear polymers of carbon monoxide, ethylene, and at least one ethylenically unsaturated hydrocarbon having a melting point of at least 214.degree. C., including drawing of a linear polymer sheet along one or two axes, respectively, at a draw temperature of from about 4.degree. to 15.degree. C. below the melting point of the terpolymer, and at a draw ratio of between 4 to 20. Also disclosed are the products which have and exhibit good properties of strength and stiffness, even at low draw ratios, produced by these processes.

REFERENCES:
patent: 2495286 (1950-01-01), Brubaker
patent: 3694412 (1972-09-01), Nozaki
patent: 4698372 (1987-10-01), Moss
patent: 4842741 (1989-06-01), Coughlin et al.

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