Flocculent fiber powder mixed core material and preparation method thereof

The invention discloses a flocculent fiber powder mixed core material and a preparation method thereof, belonging to the technical field of thermal insulation materials. The flocculent fiber powder mixed core material comprises 1-20 parts of chopped strands, 20-50 parts of fumed silica, 15-40 parts of a heat insulation filler, 0-20 parts of an opacifying agent and 1-10 parts of an adhesive, and isprepared through the processes of mixing of fiber powder, preparation of a flocculent blank, preparation of a pressed blank, and demolding and pushing-out of the pressed blank. According to the method, the chopped strands are scattered through high-speed stirring, other materials are bound in a fiber strand network through the winding effect among fibers, and fiber strand interweaving points arefixed through the adhesive, so the flocculent blank is formed; and the flocculent blank is poured into a metal mold, the blank is heated and pressurizied for 0.1-5 min at a temperature of 150-250 DEGC and under a pressure of 0