Patent ID: 9492955
Filing Date: 2016-11-15
CPC Classification: B29C,B29K,B29L,B60R,D04H,G10K,Y10T

Claim Text:
1. A method for molding a highly heat-resistant sound absorbing and insulating material, comprising: i) a releasing agent coating step of coating a releasing agent inside a hot die; ii) a hot compression molding step of fixing a shape of a sound absorbing material by installing a sound absorbing material comprising, based on 100 parts by weight of the sound absorbing material, 20-80 parts by weight of a fiber material having a limiting oxygen index (LOI) of 25% or greater and a heat resistance temperature of 200° C. or greater and 20-80 parts by weight of a thermosetting binder resin having a heat resistance temperature of 200° C. or greater on the hot die coated with the releasing agent; and iii) a cold compression step of stabilizing the fixed shape of the compressed sound absorbing material, wherein the sound absorbing material comprises a nonwoven fabric comprising a fiber material and a thermosetting binder resin which is located in the same layer as the nonwoven fabric and is impregnated in the nonwoven while maintaining a three-dimensional structure inside the nonwoven fabric, the thermosetting binder resin being distributed uniformly on the entire fiber yarn of the nonwoven fabric and forming smaller-sized vent holes as compared to before the impregnation of the binder.