| 摘要 |
<p>FOAM PLASTIC FILLED DOUBLE WALLED SOUND INSULATING PANEL. Containing divided compartments of high-density material, e.g. sand, fine gravel, between outer walls and insulating layer, combines following features; a) insulating layer is corrugated, the peaks being firmly attached externally to one outer wall and the troughs likewise to other outer wall. b) stiffness of insulating layer with regard to forces normal to panel is 0.05-3 (pref. 0.2) Kp/cm3. c) stiffness of insulating layer in concave parts of its indulations is not greater than 3 Kp/cm2 with regard to forces normal to the layer.</p> |
