Improved high performance composite damping material

摘要

The vibration damping material functions to absorb and block various vibrations and noises, and the present inventor of the present invention has 8 layers of restraint layers, which were filed on May 4, 1996, but the sufficient vibration occurred and the productivity was not good.;The present inventors' filed on May 4, 1996 disclose a sound absorbing sheet in which a metal foil and a sound absorbing layer are integrated with a polymer adhesive, a vibration and noise scattering layer coated with a polymer adhesive on a high strength porous fiber layer, a vibration damping composition layer and a polymer film Layered vibration damping layer and vibration damping layer are laminated in this order. The vibration damping and sound damping ability are superior to those of any vibration damping material, but the sufficient vibration phenomenon occurs or the manufacturing cost is increased Even though the superiority of the performance is acknowledged because the workability is low, there are obstacles to generalization. Accordingly, the present invention is directed to manufacturing a vibration damping material having improved performance and economical efficiency, in spite of simplifying the structure composed of eight layers while maintaining the basic structure of the prior art as a three-layer structure .;In the present invention, the sound insulating layer (1) and the vibration damping sheet layer (3) are laminated on the upper and lower portions of the vibration and noise scattering layer (2), thereby simplifying the restraint layer to three layers. In the case of using two sound insulation layers as the third figure and using more emphasis on vibration attenuation, a double vibration damping sheet layer is constructed as shown in Fig. 4, so that the vibration damping performance can be improved to a higher level, The sound-insulating layer 1 and the vibration-damping sheet layer 3 were made almost identical in function even if they were piled upwards and downwards. As a result, productivity is improved dramatically and workability in the field is increased.