Patent ID: 9527260
Filing Date: 2016-12-27
CPC Classification: B31B

Claim Text:
1. A method of forming a coated porous sheet, comprising the steps of: a) providing a porous sheet, wherein said porous sheet comprises an extensible (E) paper with a machine direction (MD) stretch in the range of from 7 to 9% and a grammage in range of from 100 to 120 g/m b) providing a coating composition consisting essentially of an aqueous dispersion consisting essentially of at least one polyolefin, water, one or more stabilizers, optionally one or more plasticizers, optionally one or more fillers, optionally one or more tackifiers, and optionally one or more pigments; c) applying said aqueous dispersion on at least one surface of said sheet; d) optionally, heating said sheet to a temperature above the melting temperature of said at least one polyolefin; and e) thereby forming said coated porous sheet, wherein said coated porous sheet has a water vapour transmission rate (WVTR), measured according to TAPPI 448, in the range of less 670 g/m