Flexible duct insulation having improved flame resistance
AssigneeOwens Corning Fiberglas Technology, Inc.
InventorPatrick F. Aubourg
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Abstract
A flame resistant insulation product comprises a fibrous mineral material that has been rotary fiberized, preferably a fibrous glass. The composition of the mineral material has a softening point of at least about 699° C. An insulated duct includes a tubular wall that defines a hollow interior for conducting a fluid, and a layer of the insulation product wrapped about the wall. The mineral material reduces the number of samples of the insulated duct failing the flame penetration test of a UL 181 Standard compared to the same insulated duct with a mineral material having a softening point of less than 699° C.
Claims14
An insulated duct for conducting a fluid comprising a tubular wall defining a hollow interior for conducting a fluid, and a layer of insulation product wrapped about the wall, the insulation product comprising fibrous mineral material that has been rotary fiberized, the composition of the mineral material having a softening point of at least about 699° C., the mineral material reducing the number of samples of the insulated duct failing a flame penetration test of a UL 181 Standard compared to the same insulated duct with a mineral material having a softening point of less than 699° C.
A method of improving the flame penetration resistance of an insulated duct, the insulated duct comprising a tubular wall defining a hollow interior for conducting a fluid, and a layer of insulation product wrapped about the wall, the insulation product comprising fibrous mineral material that has been rotary fiberized, the method comprising providing the mineral material with a softening point of at least about 699° C., the mineral material reducing the number of samples of the insulated duct failing the flame penetration test of a UL 181 Standard compared to the same insulated duct with a mineral material having a softening point of less than 699° C.
Dependencies are inferred from the claim text.