Patent ID: 8007873

Claim:
A method for producing a coated thermal contracting film, comprising the following steps: a) providing a thermal contracting film; b) providing a water-based adhesive layer on a surface of the thermal contracting film; c) providing a water-based emulsion layer on the water-based adhesive layer; d) drying the water-based adhesive layer and the water-based emulsion layer by microwaves sufficient to crystallize and homogeneously crosslink so as to form an abrasion-resistant and oxygen and water obstructive surface layer on the surface of the thermal contracting film, wherein the step b) is performed by applying a water-based polyurethane or an adhesive PVDC (poly(vinylidene chloride)) emulsion on the surface of the thermal contracting film; wherein the step c) is performed by applying a water-based PVDC emulsion comprising 2-10% by weight of slip agent, 0.1-0.8% by weight of anti-adhesion agent and 79.2-97.9% by weight of PVDC emulsion on the water-based adhesive layer, and wherein the step d) is performed at 30-60° C. for 12-120 hours.