| abstract |
(57) [Summary] [Purpose] To provide excellent vibration damping and high rigidity over a wide temperature range on a large area substrate that is easily vibrated by the vehicle and has low robustness. [Structure] It is composed of three layers, a spacer layer made of a foamable thermosetting resin sheet, a damping material sheet layer, and a restraining material sheet layer, and the contact surfaces of these sheets and the vibration substrate are fused and integrated by heating and foamed. To do. The spacer layer is composed of a methacrylic resin, a curing agent for epoxy resin, a foaming agent, and a surfactant, and the damping material sheet layer is formed by adding a tackifier such as polybutene to butyl rubber, The restraint material sheet is an aliphatic hydrocarbon resin sheet, a thermosetting plastic sheet or a metal sheet. |