Patent ID: 6914022
Filing Date: 2005-07-05
Classification: B32B,B64G,D04H,Y10S,Y10T

Abstract:
1. A flexible layered thermal insulation, comprising: a felt comprised at least partially of needled polybenzazole (PBZ) fibers, such felt having an outer mold line (OML) surface and an inner mold line (IML) surface; a layer of fabric comprised of ceramic fibers, affixed to the OML surface of the felt; and, a ceramic coating applied to the fibers of the fabric layer, wherein the felt comprises PBZ fibers in combination with fibers of poly(1,3-phenylene isophtalamide) and wherein the felt has a higher percentage of PBZ fibers in the region adjacent the OML surface of the felt than the region adjacent the IML surface of the felt.