Abstract: An acoustical insulation laminate having a porous polyolefin layer and a process for making the laminate. The laminate preferably includes a porous multiple density polyolefin film, a sound absorbing material and may include a face cloth on one or both sides of the laminate. The porous polyolefin film is preferably disposed between a sound source and the sound absorbing material improving the total noise reduction coefficient of the sound absorbing material alone while reducing the weight of laminates having similar noise reduction capabilities.

Abstract: An acoustical insulation laminate having a porous polyolefin layer and a process for making the laminate. The laminate preferably includes a porous multiple density polyolefin film, a sound absorbing material and may include a face cloth on one or both sides of the laminate. The porous polyolefin film is preferably disposed between a sound source and the sound absorbing material improving the total noise reduction coefficient of the sound absorbing material alone while reducing the weight of laminates having similar noise reduction capabilities.

Abstract: An acoustical insulation laminate having a porous polyolefin layer and a process for making the laminate. The laminate preferably includes a porous multiple density polyolefin film, a sound absorbing material and may include a face cloth on one or both sides of the laminate. The porous polyolefin film is preferably disposed between a sound source and the sound absorbing material improving the total noise reduction coefficient of the sound absorbing material alone while reducing the weight of laminates having similar noise reduction capabilities.

Abstract: A thermal and acoustical insulation product prepared from a mixture of fiberglass, scrap nylon of less than 0.25" in length and a thermo-setting resin. The insulation product is in a ductliner or molded form. The fiberglass will generally be in a concentration of from 20 to 80 percent by weight of the product; the nylon will be from 1 to 30 percent by weight of the product; and the thermo-setting resin will be from 5 to 35 percent by weight of the product.

Abstract: A thermal and acoustical insulation product prepared from a mixture of fiberglass, scrap nylon of less than 0.25" in length and a thermo-setting resin. The insulation product is in a ductliner or molded form. The fiberglass will generally be in a concentration of from 20 to 80 percent by weight of the product; the nylon will be from 1 to 30 percent by weight of the product; and the thermo-setting resin will be from 5 to 35 percent by weight of the product.