METHOD FOR MOLDING HIGHLY HEAT-RESISTANT SOUND ABSORBING AND SCREENING MATERIAL

摘要

The present invention relates to a method for molding a highly heat-resistant sound absorbing and screening material, and more specifically, to a method for molding a highly heat-resistant sound absorbing and screening material, which uses a sound absorbing material comprising 20 to 80 parts by weight of a fiber material of which the limiting oxygen index (LOI) is at least 25% and of which the heat resistance temperature is at least 200?, and 20 to 80 parts by weight of a thermosetting binder resin of which the heat resistance temperature is at least 200?, wherein the highly heat-resistant sound absorbing and screening material is installed on an engine cylinder block and a vehicle body panel above a muffler of a vehicle. The method for molding the highly heat-resistant sound absorbing and screening material comprises: a releasing agent coating step of coating a releasing agent inside a hot die; a hot compression molding step of fixing a shape; and a cold compression step of stabilizing the shape. The highly heat-resistant sound absorbing and screening material molded according to the method can reduce noise inside a vehicle by blocking radiated noise, which is generated from an engine and an exhaust system, from being transferred into the inside of the vehicle through the panel of the vehicle body, can maintain the shape even in high heat over 200? generated from the engine and the exhaust system, and can satisfy flame retardant properties of UL 94V-0.