Patent ID: 8636076
Filing Date: 2014-01-28
Classification: A62C,C04B,D02J,D04H,F16L,H02G

Abstract:
1. A method of firestopping a through-penetration, comprising: providing a fusible inorganic blended-fiber web at least partially within the through-penetration, wherein the through-penetration does not comprise a firestop sealant, wherein the fusible inorganic blended-fiber web comprises inorganic fibers with air-filled interstitial spaces therebetween, and wherein the web comprises a blend of at least first, low melting inorganic fibers with a melting point of between 1300° F. and 2000° F., and second, high melting inorganic fibers, which second, high melting inorganic fibers do not exhibit a melting point within 200 degrees F. above the melting point of the first, low melting inorganic fibers.