Patent ID: 6551951
Filing Date: 2003-04-22
Classification: B32B,B64C,D04H,E04B,F16L,Y10T

Abstract:
A burn through resistant fire barrier for use in a thermal and/or acoustical insulation blanket system, comprising:a burn through resistant nonwoven mat comprising from about 74.5% to about 98.9% by weight base fibers having a mean diameter between 6 microns and 12 microns and a service temperature of at least 1100Â° C., from about 1% to about 10% by weight biosoluble glass microfibers having a mean diameter between about 0.7 microns and about 1.5 microns, and from about 0.1% to about 0.5% by weight lubricant sizing with a water repellent additive; the base fibers and the biosoluble glass microfibers being randomly oriented and entangled together to form the nonwoven mat; the nonwoven mat being capable of retaining its integrity and dimensional stability for at least four minutes during exposure to a 1100Â° C. temperature and pulsating high pressure flame front in accordance with the FAA medium scale burn through test; and the nonwoven mat having a basis weight between about 30 g/m2 and about 100 g/m2.