The invention belongs to the technical field of composite materials, and particularly relates to an
epoxy resin composition. The decorative plate comprises
epoxy resin
layers and a filling layer, thenumber of the
epoxy resin
layers is two, and the filling layer is located between the two epoxy resin
layers. The side, close to the filling layer, of each epoxy resin layer is fixedly connected withglass
fiber cloth. The filling layer comprises a supporting frame and sound absorption
sponge. The supporting frame is of a honeybee-worm-shaped structure. The supporting frame
honeycomb is filled with the sound absorption
sponge. Rubber bags which are uniformly distributed are fixedly connected to the interior of the sound absorption
sponge. The rubber bags are filled with water. Micropores are formed in the surfaces of the rubber bags and are closed in an initial state. According to the invention,
sodium bicarbonate filling the sound absorption sponge is self-decomposed in a high-temperatureenvironment, so that the
sodium bicarbonate is matched with water in the rubber bags to cool the whole plate, and meanwhile, the
sodium bicarbonate reacts with a compound in epoxy resin to generate
calcium carbonate to play a role in supporting and reinforcing while the temperature is reduced.