An insulation product includes a fibrous layer and a facing layer. The fibrous layer includes synthetic fibers, has first and second opposing major surfaces, and has an average denier of less than about 3.0. The facing layer includes a paper-backed facing adhered to one of the first and second major
An insulation product includes a fibrous layer and a facing layer. The fibrous layer includes synthetic fibers, has first and second opposing major surfaces, and has an average denier of less than about 3.0. The facing layer includes a paper-backed facing adhered to one of the first and second major surfaces of the fibrous layer. The insulation product has: a flame spread index of no greater than 25 and a smoke developed index of no greater than 50 as measured in accordance with ASTM E84; a thickness of between about 0.5 and 2 inches; and a thermal conductivity of less than about 0.3 Btu-in./ft2-hr-° F.
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1. An insulation product, consisting essentially of: a fibrous layer comprising synthetic fibers, the fibrous layer having first and second opposing major surfaces, the fibrous layer having an average denier of less than about 3.0; anda paper-backed facing layer comprising a paper layer and a metall
1. An insulation product, consisting essentially of: a fibrous layer comprising synthetic fibers, the fibrous layer having first and second opposing major surfaces, the fibrous layer having an average denier of less than about 3.0; anda paper-backed facing layer comprising a paper layer and a metallic layer, the paper layer adhered to only one of the first and second major surfaces of the fibrous layer, wherein the facing layer is a Foil/Scrim/Kraft (FSK) facing layer, and wherein the facing layer has a thickness of about 0.01 inches and a weight of about 0.35 osf;wherein the insulation product has a flame spread index of no greater than 25 and a smoke developed index of no greater than 50 as measured in accordance with ASTM E84, wherein the insulation product has a thickness of between about 0.5 and about 2 inches, wherein the insulation product has a density at least about 1.27 pcf, and wherein the insulation product has a thermal conductivity of less than about 0.3 Btu-in./ft2-hr-° F. 2. The insulation product of claim 1, wherein the fibrous layer comprises PET fibers. 3. The insulation product of claim 1, wherein the fibrous layer has an average denier of less than about 2.5. 4. The insulation product of claim 1, wherein the fibrous layer has an average denier of no greater than 2.1. 5. The insulation product of claim 1, wherein the metallic layer is an aluminum foil layer. 6. The insulation product of claim 1, wherein the facing layer further includes a reinforcing layer disposed between the paper layer and the metallic layer. 7. The insulation product of claim 1, wherein the insulation product has a thermal resistance of between about 2 and about 8.5 hr-ft2-° F./Btu. 8. The insulation product of claim 1, wherein the insulation product has a weight of between about 1 and about 4 osf. 9. The insulation product of claim 1, wherein the insulation product has a density of less than about 2 pcf. 10. The insulation product of claim 1, wherein the fibrous layer comprises PET fibers, the PET fibers being between about 20% and about 70% by weight standard staple fibers, between about 0% and about 50% flame retardant staple fibers and between about 20% and about 40% by weight bicomponent fibers. 11. The insulation product of claim 1, wherein the facing layer is adhered to the fibrous layer by a thermoplastic adhesive. 12. An insulation product, consisting essentially of: a synthetic fibrous layer comprising PET fibers, the fibrous layer having first and second opposing major surfaces, the fibrous layer having an average denier of less than about 2.5; anda paper-backed facing layer comprising a paper layer and a metallic layer, the paper layer adhered to only one of the first and second major surfaces of the synthetic fibrous layer, wherein the facing layer is a Foil/Scrim/Kraft (FSK) facing layer, the facing layer has a thickness of about 0.01 inches and a weight of about 0.35 osf;wherein the insulation product has a flame spread index of no greater than 25 and a smoke developed index of no greater than 50 as measured in accordance with ASTM E84, wherein the insulation product has a product thickness of between about 0.5 and about 2 inches, wherein the insulation product has a weight of between 1 and 4 osf, wherein the insulation product has a density at least about 1.27 pcf, and wherein the insulation product has a thermal conductivity of less than about 0.3 Btu-in./ft2-hr-° F. 13. The insulation product of claim 12, wherein the facing layer further includes a reinforcing layer disposed between the paper layer and the metallic layer. 14. The insulation product of claim 13, wherein the reinforcing layer comprises fiberglass. 15. The insulation product of claim 12, wherein the PET fibers are between about 20% and about 70% by weight standard staple fibers, between about 0% and about 50% flame retardant staple fibers and between about 20% and about 40% by weight sheath-core bicomponent fibers. 16. The insulation product of claim 12, wherein the facing layer is adhered to the fibrous layer by a thermoplastic adhesive. 17. An insulation product, consisting essentially of: a synthetic fibrous layer comprising PET fibers, the fibrous layer having first and second opposing major surfaces, the fibrous layer having an average denier of less than about 3.0; anda paper-backed Foil/Scrim/Kraft (FSK) facing layer comprising a paper layer and a metallic layer, the paper layer adhered to only one of the first and second major surfaces of the synthetic fibrous layer by a thermoplastic adhesive;wherein the insulation product has a flame spread index of no greater than 25 and a smoke developed index of no greater than 50 as measured in accordance with ASTM E84, wherein the insulation product has a product thickness of between about 0.5 and about 2 inches, wherein the insulation product has a weight of between about 1 and about 4 osf, wherein the insulation product has a density at least about 1.27 pcf, and wherein the insulation product has a thermal conductivity of less than about 0.3 Btu-in./ft2-hr-° F., wherein the facing layer has a thickness of about 0.01 inches and a weight of about 0.35 osf. 18. The insulation product of claim 1, wherein the insulation product is duct liner insulation.
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