| abstract |
The invention discloses a sound-absorbing heat-insulating polyolefin foamed sheet and a preparation method thereof, wherein the foamed sheet comprises, by weight, 110-140 parts of a component A, 20-170 parts of a component B, 1-20 parts of a foaming agent, 0.01-8 parts of a foam hole regulator and 0.1-20 parts of a filler, wherein the component A consists of 100 parts of polyethylene and 10-40 parts of a polyethylene copolymer, and the component B consists of 10-30 parts of a thermoplastic elastomer, 10-80 parts of polyolefin resin and 0-60 parts of rubber. Weighing polyethylene resin, thermoplastic elastomer, polyolefin resin, rubber, a foaming agent, a foam hole regulator and a filler according to the weight part ratio; then, the foamed sheet is obtained through mixing granulation, sheet extrusion, irradiation crosslinking and free foaming. The foamed sheet prepared by the method has the functions of sound absorption and heat insulation, the aperture ratio reaches 5-70%, the sound absorption coefficient reaches 0.2-0.5, and the heat conductivity coefficient reaches 0.026-0.035. |