Oriented polyester film

Details Oriented polyester film Oriented polyester film

2011-01-18

2011-01-18

Chen, Vivian (Department: 1787)

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

C428S212000, C428S213000, C428S215000, C428S332000, C428S339000, C428S480000, C428S910000, C428S847000, C428S847300, C428S847500, C428S847700

Reexamination Certificate

active

07871691

ABSTRACT:
An object of the invention is to provide such an oriented polyester film that has a constant thickness, and is excellent in dimensional stability at a high temperature and dimensional stability to temperature change in a working temperature range. The invention relates to an oriented polyester film containing as a major component of a substrate layer polyethylene -2,6-naphthalene dicarboxylate, being stretched at least in one direction, and having a film thickness of from 12 to 250 μm, wherein(1) a coefficient of linear thermal expansion αt at a temperature of from 30 to 100° C. is from 0 to 15 ppm/° C. in both longitudinal and width directions of the film, and(2) a thermal shrinkage rate at 100° C. for 10 minutes is 0.5% or less in both longitudinal and width directions of the film.

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English Translation of JP 2001-191405A.

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