Vibration damper material comprising a vicso elastic layer of unvulcanized rubber

Abstract

The vibration damper material comprises a laminate of a viscoelastic layer and a hardenable pressure sensitive adhesive layer, and a release liner applied onto the hardenable pressure sensitive adhesive layer. The viscoelastic layer is intended to form a vibration damping layer, and contains a viscoelastic material mainly comprised of unvulcanized rubber to which a vulcanizing agent (crosslinking agent) has been added. The hardenable pressure sensitive adhesive layer comprises a hardenable pressure sensitive adhesive which has adhesive properties in the uncured state but has a strong adhesive strength when it is cured by heating, irradiation with light or by being blocked from air for example. This hardenable pressure sensitive adhesive layer contains a sticking polymer, a reactive oligomer and a polymerization initiator. The release liner which is utilized has a silicone layer formed on the surface of a base material thereof. This vibration damper material has an excellent ability to follow curved surfaces, a reliable adhesivity, and provides a high degree of vibration damping property without impairing the efficiency in the operation in which the vibration damper material is applied onto an adherend.

Dependencies are inferred from the claim text.