Thermoplastic resin film and a method for producing the same

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof

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528323, 428 98, 428221, B32B 2734

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active

055741193

ABSTRACT:
A thermoplastic resin film at least oriented in the transverse direction with minimized bowing phenomenon is provided. The thermal shrinkage stress in the transverse direction of the film satisfies the following formula I, and the thermal shrinkage factor of said film in the transverse direction at a temperature that is 40.degree. C. higher than the glass transition temperature of said resin is 5% or less:

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AGFA-Gevaert AG, "Biaxial Orient Polymer Film Reduce Anistrope Preparation Cooling Film After Stretch Rapid Heat Set," RD245023 (Oct. 9, 1984).
Nakayama, Pol. Dig. (Feb. 1984) 27-35 (translation).
Yamada, "New Film Membrane," (Jul. 25, 1990) 251-255 (translation).
Osaki, J. App. Phys. 64 (8) (1988) 4181.

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