Patent ID: 8574318
Filing Date: 2013-11-05
Classification: C08J,D06P

Abstract:
1. A process for preparing an optical colored polyester film using microwave technique comprising the following steps: (1) conveying a non-colored polyester film into a disperse dye suspension with a steady water phase and simultaneously dyeing at the heating temperature of 80-85° C. for 10-120 seconds using microwave technique; (2) rinsing the colored film with a water solution containing the mass ratio of 0.1-5 percent of surfactant until a thickener on the surface of the film is thoroughly rinsed off; (3) re-rinsing the colored film after water rinsing with a solvent which includes ethanol, acetone or ethyl acetate; and (4) drying the colored film after solvent rinsing at the temperature of 130-170° C. for 10-120 seconds.