Patent ID: 6592700
Filing Date: 2003-07-15
Classification: G02B

Abstract:
A method of producing a retro-reflective sheet with high abrasion resistance comprising the steps of:coating a first coating layer, of one component type polyurethane resin mixed with reflective particles, on a pattern releasing paper having embossed grain; drying the first coating layer; coating a second coating layer, of two component polyurethane resin interface agent containing colorant, on the first coating layer; drying the second coating layer; coating an adhesive paste on the second coating layer; placing a substrate on the adhesive paste; drying and curing the adhesive paste; removing the pattern releasing paper, leaving the first coating layer and second coating layer on the substrate; using solvent to dissolve the one component type polyurethane resin of the first coating layer, leaving reflective particles exposed; and hardening the polyurethane resin, forming the retro-reflective sheet with high abrasion resistance.