Biaxially oriented films of butene-1 homopolymer and copolymers

Details Biaxially oriented films of butene-1 homopolymer and copolymers Biaxially oriented films of butene-1 homopolymer and copolymers

1982-09-30

1985-11-05

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263486, D01D 512

Patent

active

045515140

ABSTRACT:
A process for making a film of butene-1 homopolymer and copolymers of improved strength and clarity and the film made thereby. Such a film is produced by quenching an extruded poly(butene-1) homopolymer or copolymer while in the amorphous state, preferably at temperatures below 0.degree. C., and biaxially stretching the quenched film before substantial crystallization occurs. Subsequent heat setting of the film at a temperature above the stretching temperature, but below its melting point, produces a heat stable film of high break strength and clarity, suitable as a food wrap or food container overwrapping material.

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patent: 4385022 (1983-05-01), Rohn
Stein et al., Photographic Light Scattering by Polyethylene Films, Nov. _1960, vol. 31, No. 11, (1873), Journal of Applied Physics.

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