| abstract |
The invention belongs to the technical field of heat insulation, and discloses a heat insulation board and a preparation method thereof. The heat-insulating board includes a base material layer, a heat-insulating flame-retardant coating, and a panel layer, the heat-insulating flame-retardant coating is sprayed on the upper surface of the base material layer, and the panel layer is attached to the upper surface of the heat-insulating flame-retardant coating; Wherein, the base material layer is aerogel felt, the heat-insulating flame-retardant coating is composed of hot melt adhesive, flame retardant, aerogel powder, short fibers and water, and the panel layer is a fiber-reinforced resin-based composite sheet. Preparation steps: according to the composition of the thermal insulation and flame retardant coating, take each raw material, stir and mix evenly to obtain thermal insulation and flame retardant slurry; clean the surface of the aerogel felt, remove the floating powder on the surface, and obtain the felt body A; The heat-insulating and flame-retardant slurry is sprayed on the upper surface of the felt body A, and then covered with a panel layer to obtain a composite felt body, which is hot-pressed to obtain a heat-insulating board. The heat-insulating board prepared by the invention adopts the method of coating the aerogel felt with the heat-insulating flame-retardant slurry and then forming it integrally with the panel layer by hot pressing. The molding process is simple and the operation is convenient. |