Material for sound insulation consists of layer of leather fiber material coated on at least one side with layer of water-insoluble polymer material

摘要

The sound insulation material consists of a layer of leather fiber material, coated on one side or on both sides with a layer of water-insoluble polymer material. The leather fiber layer should be 5-15 mm thick and should have a specific gravity of not more than 1.00 g/cm 3>. It may consist of several individual layers glued together.