VIBRATION-ABSORBING AND NOISE-SUPPRESSING MATERIAL AND METHOD FOR MANUFACTURE THEREOF Russian patent published in 2002 - IPC

FIELD: insulation materials. SUBSTANCE: sheet material designed for application, in particular in motor car and tractor equipment for insulation of driver's or passenger compartment of vehicle against engine vibration and noise, is made from bitumen-based composition containing, wt parts: bitumen 100, graphite 8,0-12.0, and talc 40-60. Effective thickness of material is 1.5- 2.5 mm. Material can additionally include fibrous cotton manufacture waste in amounts 3-5 wt parts per 100 wt parts of bitumen and also aluminum foil facing layer with thickness, for example, 100 mcm. To facilitate mounting of material on application place, material can further include adhesive interconnecting layer with constant pastiness, in particular based on aqueous acrylic dispersion, protected by release insert. Manufacture procedure: dispersed bitumen composition with filler is first prepared in crusher, in particular rotor-type crusher, and then homogenized at temperature above bitumen softening temperature and then calendered into sheet. EFFECT: optimized manufacture procedure. 10 cl, 2 tbl