Patent ID: 6316531
Filing Date: 2001-11-13
Classification: D06P

Abstract:
A process for dyeing of UV stabilized polyester film of a thickness about 12 to 250 .mu.m, with controlled shrinkage properties, comprising the steps of:dyeing a UV stabilized polyester film in a bath comprising at least one dye and at least one polyhydric alcohol at a temperature above a glass transition temperature of the polyester film to obtain a dyed film;cleaning the dyed film in a solvent, followed by mechanically scrubbing the cleaned film to remove undissolved particles from the film; andpassing the cleaned and scrubbed film held by tenter means through an oven to produce a colored polyester film having controlled shrinkage in machine and transverse directions, with shrinkage of 0.4% to 8% in machine direction and 0 to 10% in transverse direction.