VISCOELASTIC MULTILAYER BODY FOR PREPARING COMPOSITE TYPE DAMPING MATERIAL

摘要

PURPOSE:To enhance damping capacity, by constituting the viscoelastic resin of a center layer of a polyester resin or a mixture of the polyester resin and a resin other than the polyester resin and setting the resin of an outside layer to a thermoplastic polyester resin. CONSTITUTION:In a viscoelastic multiplayer body for preparing a composite type damping material formed into a multilayer membrane having a three-layered structure consisting of a center layer formed from a viscoelastic resin having glass transition temp. of -30-60 deg.C and loss tangent of 0.5 or more at the glass transition temp. and outside layers provided to both surfaces of the center layer and formed of a thermoplastic resin having no stickiness at ambient temp. but having film forming capacity, the viscoelastic resin of the center layer is composed of a polyester resin or a mixture of the polyester resin and a resin other than the polyester resin and each of the outside layers is composed of a thermoplastic polyester resin. By this method, an intermediate layer used as the viscoelastic intermediate layer of the composite type damping material and imparting excellent damping capacity and having good adhesiveness to a metal material and hard to flow out even in the vicinity of paint baking temp. can be formed.