VIBRATION-DAMPING MULTILAYER FILM

摘要

PROBLEM TO BE SOLVED: To provide a vibration-damping film which is excellent in a vibration- damping performance and improved in adhesion to a metal sheet and which is constituted of a viscoelastic composition containing an isobutylene block copolymer. SOLUTION: The present vibration-damping multilayer film has a layer of the composition constituted mainly of the isobutylene block copolymer and the loss tangent (tanδ) thereof at 20 deg.C and 500 Hz is 0.3 or above. The film is constituted by laminating a thermally welding type adhesive layer on at least one surface of the layer of the composition.