| 摘要 |
<p>PURPOSE:To obtain the composite vibration-dampening material excellent in weldability, vibration-dampening property and spot weldability by a method in which when the intermediate layer composed of thermoplastic resin, crosslinking agent and conductive material are clamped between two metallic sheets and are stuck mutually under heating, the gel molecular fraction of the resin on the metallic sheet before being mutually stuck under heating, is limited to at most specified value. CONSTITUTION:The resin composition composed of thermoplastic resin and crosslinking agent is prepared, and at least one surface to be laminated of a metallic sheet, and preferably both surfaces to be laminated thereof are directly coated with said resin composition and conductive filler, and then they are heated at room temperature or at the temperature of 100-200 deg.C and solvent is removed. Then, continuously or after said materials have been left as they are, they are laminated under heating, and thus composite vibration-dampening material is produced, The gel molecular fraction of the resin on the metallic sheet before being mutually stuck under heating is limited to at most 70%, and more preferably to at most 60%. If is exceeds 70%, the weldability is reduced. Thus, since conductive metallic powder, carbon and solvent, etc., may be easily added to the resin composition, the vibration-dampening material capable of spot welding is obtained.</p> |
