Patent ID: 9428864
Filing Date: 2016-08-30
CPC Classification: D21H,Y10T

Claim Text:
1. A layered sheet comprising a nonwoven paper carrier having a first and second surface and an inorganic refractory layer comprising 100 percent platelets of vermiculite adjacent to at least one surface of the nonwoven paper carrier wherein the refractory layer has a dry areal weight of from 15 to 50 gsm, the bond strength between the refractory layer and the surface of the nonwoven paper carrier is no less than 0.25 lb/in, and wherein the nonwoven paper carrier (i) comprises from 70 to 90 weight percent of aramid fibers and from 10 to 30 weight percent of polymeric binder, (ii) is hydrophilic (iii) has a wet tensile strength of at least 3 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 7 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 an air permeability no greater than 100 Gurley Air Resistance (sec/100cc, 20 oz. cyl.). (vii) has a thickness of from 0.025 to 0.175 mm, (viii) has a density of from 0.25 to 1.1 g/cc, and (ix) has a basis weight of from 20 to 70 gsm and wherein the layered sheet is a component of a flame barrier for a thermal and acoustic blanket.