Patent ID: 6835421
Filing Date: 2004-12-28
Classification: B44C,D21H,Y10T

Abstract:
A method of impregnating paper used for the production of wear-resistant laminate flooring material comprising:a) taking paper; b) damping and impregnating said paper with an amino resin by the use of metering rollers; and c) additionally spraying onto said damped wet paper an additional layer of amino resin in a dispersion containing an abrasive substance and a flow-promoting agent; and wherein the final area density relative to the dry mass of raw paper amounts to 100% to 250%; and wherein the dispersion comprises 100 parts of the amino resin, 20 to 95 parts of the abrasive substance, 0.5 to 2.5 parts of a silane adhesion promoter, 5 to 25 parts of a flow-promoting agent, 0.1 to 0.4 parts of a wetting agent, 0.05 to 0.4 parts of a separating agent and of an amino resin hardener.