Patent ID: 6242081
Filing Date: 2001-06-05
Classification: B32B,Y10T

Abstract:
An oriented laminated polyester film for pasting on car windows, comprising at least three layers including at least one intermediate layer being incorporated with a dye, which the laminated polyester film satisfies the following formulae 1 to 6 simultaneously:CA/CB .ltoreq. 0.5 1 0.02 .ltoreq. DA/DZ .ltoreq. 0.8 2 1.0 .ltoreq. SMD .ltoreq. 5.0 3 STD .ltoreq. 1.5 4 0.005 .ltoreq. Ra .ltoreq. 0.05 5 H .ltoreq. 5 6wherein CA represents a dye concentration (%) in the outermost layers on both sides, in case where the dye concentrations in the outermost layers are different, CA represents a dye concentration the outermost layer with a higher dye concentration; CB represents a dye concentration (%) in the intermediate layer, in case where there exist plural intermediate layers, CB represents an average of the dye concentrations in the layers excluding the outermost layers on both sides; DA represents a sum of the thicknesses (.mu.m) of the outermost layers; DZ represents an overall thickness (.mu.m) of the whole layers; SMD represents a heat shrinkage (%) in the machine direction of the film when heat-treated at 180.degree. C. for 5 minutes; STD represents a heat shrinkage (%) in the transverse direction of the film when heat-treated at 180.degree. C. for 5 minutes; Ra represents a center line average roughness (.mu.m) of the film surface; and H represents film haze (%).