초록 ▼

Non-woven mat including basalt and amorphous refractory ceramic fibers, bio-soluble ceramic fibers, and/or heat-treated silica fibers. Embodiments of the non-woven mat surprisingly have a Resiliency Value after three thermal cycles from 25° C. to 700° C./400° C. of the Real Condition Fixture Test at

Non-woven mat including basalt and amorphous refractory ceramic fibers, bio-soluble ceramic fibers, and/or heat-treated silica fibers. Embodiments of the non-woven mat surprisingly have a Resiliency Value after three thermal cycles from 25° C. to 700° C./400° C. of the Real Condition Fixture Test at least 1.1 times greater than the Resiliency Value of a comparable non-woven mat consisting of any individual type of fibers of the non-woven mat. The non-woven mats are useful, for example, in pollution control devices and other thermal insulation applications.

대표청구항 ▼

1. A non-woven mat comprised of a blend comprised of at least 25 percent by weight basalt fibers and at least 10 percent by weight fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof, based on

1. A non-woven mat comprised of a blend comprised of at least 25 percent by weight basalt fibers and at least 10 percent by weight fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof, based on the total weight of the mat, and wherein the non-woven mat is collectively comprised of at least 80 percent by weight of said basalt fibers and said fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof, based on the total weight of the mat. 2. The non-woven mat according to claim 1 collectively comprising at least 80 percent by weight of said basalt fibers and said amorphous refractory ceramic fibers. 3. The non-woven mat according to claim 1, wherein the basalt fibers and the fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof present in the blend collectively provide non-woven mat with a Resiliency Value after three thermal cycles from 25° C. to 700° C./400° C. of the Real Condition Fixture Test at least 1.1 times greater than the Resiliency Value of a comparable non-woven mat consisting of any individual basalt fibers, amorphous refractory ceramic fibers, bio-soluble ceramic fibers, and heat-treated silica fibers, present in the non-woven mat comprised of the blend of fibers. 4. The non-woven mat according to claim 1, wherein the mat comprises at least 15 percent by weight of the fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof based on the total weight of the mat. 5. The non-woven mat according to claim 4, wherein the non-woven mat as-made prior to heating above 500° C. contains not greater than 5 percent by weight organic material, based on the total weight of the mat. 6. A pollution control device comprising a pollution control element mounted in a casing with the mat according to claim 1. 7. An exhaust system comprising a double walled exhaust component and the mat according to claim 1, wherein the mat is positioned in a gap between the walls of the double wall exhaust component. 8. The exhaust system according to claim 7, wherein the double walled exhaust component is an exhaust pipe. 9. The exhaust system according to claim 7, wherein the double walled exhaust component is an end cone of a pollution control device. 10. The exhaust system according to claim 7, wherein the double walled exhaust component is an exhaust manifold. 11. The non-woven mat according to claim 3, wherein the basalt fibers and the fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof present in the blend collectively provide non-woven mat with a Resiliency Value after three thermal cycles from 25° C. to 700° C./400° C. of the Real Condition Fixture Test at least 1.25 times greater than the Resiliency Value of a comparable non-woven mat consisting of any individual basalt fibers, amorphous refractory ceramic fibers, bio-soluble ceramic fibers, and heat-treated silica fibers, present in the non-woven mat comprised of the blend of fibers. 12. The non-woven mat according to claim 3, wherein the mat comprises at least 15 percent by weight of the fibers selected from the group consisting of amorphous refractory ceramic fibers, bio-soluble ceramic fibers, heat-treated silica fibers, and mixtures thereof based on the total weight of the mat. 13. The non-woven mat according to claim 12, wherein the non-woven mat as-made prior to heating above 500° C. contains not greater than 5 percent by weight organic material, based on the total weight of the mat. 14. The non-woven mat according to claim 3, wherein the non-woven mat is suitable for being used in mounting a pollution control element in a casing of a pollution control device or for being disposed between an inner metal wall and an outer metal wall of an exhaust pipe, an end cone of a pollution control device, or an exhaust manifold of an internal combustion engine. 15. The non-woven mat according to claim 3, wherein the non-woven mat is suitable for being used in mounting a pollution control element in a casing of a pollution control device. 16. The non-woven mat according to claim 3, wherein the non-woven mat is suitable for being disposed between an inner metal wall and an outer metal wall of an exhaust pipe, an end cone of a pollution control device, or an exhaust manifold of an internal combustion engine. 17. The non-woven mat according to claim 11, wherein the non-woven mat is suitable for being used in mounting a pollution control element in a casing of a pollution control device or for being disposed between an inner metal wall and an outer metal wall of an exhaust pipe, an end cone of a pollution control device, or an exhaust manifold of an internal combustion engine. 18. The non-woven mat according to claim 11, wherein the non-woven mat is suitable for being used in mounting a pollution control element in a casing of a pollution control device. 19. The non-woven mat according to claim 11, wherein the non-woven mat is suitable for being disposed between an inner metal wall and an outer metal wall of an exhaust pipe, an end cone of a pollution control device, or an exhaust manifold of an internal combustion engine.