Patent ID: 6680087
Filing Date: 2004-01-20
Classification: C09D,Y10S,Y10T

Abstract:
A method for manufacturing a decorative floor covering which is comprised of a backing layer, a substrate layer, and a surface layer, in which the backing layer is comprised of one of a foaming sub-layer and a mechanical foaming sub-layer, and a sizing sub-layer, and wherein the surface layer is comprised of one of a foaming sub-layer and a non-forming sub-layer, a printing sub-layer, and a skin sub-layer, comprising the processes of:(A) air-knife coating a surface treatment composition comprising 40 weight parts of urethaneacrylate oligomer; acrylate based monomer comprised of 7 to 11 weight parts of single functional group monomer, 34 to 43 weight parts of bi-functional group monomer, and 0 to 5 weight parts of tri-functional group monomer; 4 weight parts of acetophenone photoinitiator; 1 weight part of reactive silicon additive; and 5 weight parts of silica matting agent, wherein the air-knife coating applies the surface treatment composition to a thickness of 10 to 40 &mgr;m on the skin sub-layer; and (B) curing the coated surface treatment composition at a line speed of 5 to 30 m/min using 4 to 8 middle pressure mercury lamps having an output of 200 to 300 watt/in2.