HIGH TEMPERATURE RESISTANT INSULATION MAT

Methods of forming insulation mats including: providing a mixture of fibers comprising first inorganic fibers and second inorganic fibers， wherein the first inorganic fibers shrink by no more than about 2 percent and the second fibers shrink by about 5 to about 15 percent when the mixture of fibers is heat treated; wet-forming a web of fibers from the mixture of fibers; entangling the web of fibers to form an insulation mat; heat-treating the insulation mat; and drying the web of fibers and/or the insulation mat after said wet-forming and prior to or during said heat treating; and wherein the insulation mat includes substantially no non-fibrous binder material prior to said heat treating the insulation mat at a temperature of from about 500°C to about 800°C， optionally for at least about 3 minutes. Insulation mats manufactured according to the above methods. Methods of forming insulation mats including: providing a mixture of fibers comprising first inorganic fibers and second inorganic fibers， wherein the first inorganic fibers shrink by no more than about 2 percent and the second fibers shrink by about 5 to about 15 percent when the mixture of fibers is heat treated; wet-forming a web of fibers from the mixture of fibers; entangling the web of fibers to form an insulation mat; heat-treating the insulation mat; and drying the web of fibers and/or the insulation mat after said wet-forming and prior to or during said heat treating; and wherein the insulation mat includes substantially no non-fibrous binder material prior to said heat treating the insulation mat at a temperature of from about 500°C to about 800°C， optionally for at least about 3 minutes. Insulation mats manufactured according to the above methods.