Batting thermal insulation with fire resistant properties
AssigneeThe Dow Chemical Company
InventorsKyung W. Suh, Burton D. Brubaker, William G. Stobby, Francis P. McCullough, R. Vernon Snelgrove
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Abstract
A fibrous thermal insulation comprising an intimate blend of A) an effective amount of non-graphitic carbonaceous fibers having an LOI value greater than 40, a percent char value greater than 65, and a thermal conductivity less than 1 BTU hr ft.sup.2 /.degree.F. for providing a synergistic improvement in fire resistance, and B) hollow thermoplastic fibers.
Claims11
A fibrous thermal insulation comprising an intimate blend of A) about 20 to 75% by weight of non-graphitic polymeric carbonaceous fibers having an LOI value greater than 40, a carbon content of less than 85 percent, a percent char value greater than 65, and a thermal conductivity less than 1 BTU ft/hr ft.sup.2 .degree. F. for providing a synergistic improvement in fire resistance, and B) crazed hollow thermoplastic fibers.
A fibrous thermal insulation comprising an intimate blend of A) 20 to 75% by weight of non-electrically conductive carbonaceous fibers derived from oxidized polyacrylonitrile fibers for providing fire resistance and B) hollow styrenic fibers having about 6 to 12 crazes, said carbonaceous fibers have an LOI value greater than 40, a percent char value greater than 65, a carbon content of less than 85 percent and a thermal conductivity less than 1 BTU ft/hr ft.sup.2 .degree. F.
Dependencies are inferred from the claim text.