SOUND INSULATOR AND SOUND INSULATING STRUCTURE

摘要

PURPOSE: To provide a sound insulator having sound insulating performance for controlling sounds resulting from vibration. CONSTITUTION: The sound insulator 1 as a flexible laminated body controlling sounds propagating through solids is provided having a pair of base layers 1a made from a thermoplastic resin material, and an intermediate layer 2 made from a thermoplastic resin material with the addition of ligneous material grains and which is formed into a porous structure. The sound insulator contains as the thermoplastic resin material a polyolefin such as polypropylene to which EPDM is added as rubber material, and the wood material grains added to the intermediate layer are kenaf cores with grain diameters of about 3 to 6 mm, and a foaming agent is added to the laminated body to provide the sound insulator with good sound insulating performance and control sounds propagating through solids.