Process for coloring a textile substrate
View Patent ↗The present invention relates to methods of imparting color and ultraviolet protection to synthetic yarns or substrates. More specifically, the present invention is directed to a method of solution dyeing a polymeric material during polymerization to form a base color shade, and subsequently dyeing the polymeric material by either yarn dyeing or piece dyeing. Ultraviolet protection is also provided in the solution dyeing step, by introducing an ultraviolet stabilizing agent into the polymer. The base shade may then be transformed into a useful color pallet with enhanced lightfastness properties by applying a final color shade late in the fabric formation process.
1. A method of dyeing synthetic material, said method comprising the steps of:
internally dyeing a polymeric material by means of introducing a colorant into a melt of said polymeric material, wherein said colorant provides a base color shade for said polymeric material:
producing yarn from said internally dyed polymeric material; and
externally dyeing said yarn to form a final color shade thereon.
2. The method set forth in claim 1 , further including the step of impregnating said polymeric material with an ultraviolet stabilizing agent.
3. The method set forth in claim 1 , said base color shade provides between 70% and 90% of the total depth of color of said final color shade.
4. A fabric treated in accordance with claim 1 .