Patent ID: 8592002
Filing Date: 2013-11-26
Classification: B05C,D21H,Y10T

Abstract:
1. A process for the production of singly and/or multiply coated paper and/or board, which are particularly suitable for printing, packaging and inscription, comprising coating the substrate with a coating liquid of a free-falling liquid curtain, wherein the coating liquid has an extensional viscosity, measured by the CaBER method, of from 1 to 1000 Pa·s at a Hencky strain of from 6 to 15, the coating liquid has a solid content of from 40% to 75% by weight, the coating liquid has a Brookfield viscosity of from 0 to 5000 mPa·s, a coat weight of a coating slip is from 0.1 g/m the coating liquid comprises polyacrylamides which have a molecular weight Mw of from 20 to 50 million.