Oriented laminated polyester film for pasting on car window
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United States of America Patent
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Jun 5, 2001
Grant Date -
N/A
app pub date -
Apr 16, 1999
filing date -
Dec 17, 1996
priority date (Note) -
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Abstract
The present invention relates to an oriented laminated polyester film for pasting on car windows, comprising at least three layers including intermediate layer(s) being incorporated with a dye, which laminated polyester film satisfies the following conditions simultaneously: the ratio of the dye concentration (%) in the outermost layers on both sides (CA) to the dye concentration (%) in the intermediate layer (CB) being not more than 0.5, the ratio of the sum of the thicknesses (.mu.m) of the outermost layers (DA) to the overall thickness (.mu.m) of the whole layers (DZ) being 0.02 to 0.8, the heat shrinkage (%) in the machine direction and transverse direction of the film when heat-treated at 180.degree. C. for 5 minutes (SMD and STD) being 1.0 to 5.0% and not more than 2.0%, respectively, the center line average roughness (.mu.m) of the film surface (Ra) being 0.005 to 0.05 .mu.m, and the film haze (H, %) being not more than 5%. This laminated film is free from the problem of contamination by the dye during manufacture thereof, shows excellent workability when applied curved glass of an automobile, and also has excellent transparency.
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