Polyester film

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber

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525437, 524222, 524323, 524375, 524413, 428402, 2642101, 264291, D02G 300

Patent

active

055629849

ABSTRACT:
A polyester film contains a polyester having an intrinsic viscosity (IV) in the range from 0.65 to 0.8 and an antioxidant. The polyester has an endothermic high temperature peak at a temperature of (A).degree.C. and an endothermic low temperature peak at a temperature of (B).degree.C., both peaks being measured by differential scanning calorimetry (DSC), and the value of (A-B) is in the range from 25.degree. C. to 50.degree. C. The polyester film is suitable for use an insulation film, exhibiting improved ageing properties.

REFERENCES:
patent: 5124388 (1992-06-01), Pruett et al.
Japanese Abstract Publication No. JP 04316829/A dated Nov. 9, 1992.
Research Disclosure 14434 (Apr. 1976).
WO 92/13021 (Aug. 1992).

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