| 摘要 |
A composite sound damping member for attachment to a sound-emitting/transmitting structure such as a vehicle body. The member includes a plate (2) made of a rigid material, e.g. metal, the structure-engaging side of which is coated with and bonded to a plastic layer (3) made of a visco-elastic material, which may be intrinsically adhesive, such as a synthetic rubber. Said rigid plate (2) consists of at least one flexible metal sheet no thicker than 0.5 mm and thinner than the plastic layer (3), and said visco-elastic material has the consistency of putty and, in the temperature range between -40 DEG C and +60 DEG C, combines the properties of retaining its essential physical and chemical properties, in particular its visco-elasticity, having a sound damping capacity of at least 10 and preferably 60 dB/s per m<2> for 1 kg of the member, when bonded to the metal sheet (2), and having an adhesiveness of at least 40 N/dm<2>, expressed as the tensile force required to dislodge the member when it is bonded to the metal sheet (2). |
