Method for impregnating decorative papers
AssigneeKronospan Technical Company Ltd.
InventorDieter Döhring
Life of this patent
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Abstract
A method for impregnating decorative papers which are used for producing highly abrasion-proof laminate floor materials. The decorative paper is first moistened with an amino resin and is thus impregnated. The amount of resin applied is controlled using dosing rollers. In addition, a layer including an amino resin is sprayed with a special dispersion onto the moistened decorative paper. The final mass per unit area with regard to the dry mass of the base paper ranges from 100% to 250%.
Claims6
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.
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;
- wherein the final area density relative to the dry mass of raw paper amounts to 100% to 250%;
- wherein the abrasive substance comprises at least one of aluminium oxide and silicon carbide having a mean particle size of 60 to 160 μ-m;
- 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.
Dependencies are inferred from the claim text.