Patent ID: 8967331
Filing Date: 2015-03-03
Classification: B32B,B64C,C08K,D21H,Y10T

Abstract:
1. A multilayered sheet comprising a release paper having a first and a second outer surface and an inorganic refractory layer adjacent to at least one surface of the release paper wherein the inorganic refractory layer has a dry areal weight of from 15 to 50 gsm and a residual moisture content of no greater than 10 percent by weight, wherein the release paper (i) comprises a blend of cellulose and cotton fibers, (ii) is hydrophilic (iii) has a wet tensile strength of at least 5 lb/in in a first direction and at least 2 lb/in in a second direction, the second direction being transverse to the first direction, (iv) has a dry tensile strength of at least 10 lb/in in a first direction and at least 5 lb/in in a second direction, the second direction being transverse to the first direction, (v) has a surface smoothness on at least one outer surface of no greater than 150 Sheffield units, (vi) has a surface release value from at least one outer surface of from 0.25 to 1.5 lb/in, (vii) has a thickness of from 5 to 12 mil, (viii) has a density of from 0.9 to 1.1 g/cc, and (ix) has an air permeability no greater than 1200 Gurley Air Resistance (sec/100cc, 20 oz. cyl.).