The invention relates to an environment-friendly light heat-insulating material for fireproof
doors and buildings, and a manufacturing method thereof. The manufacturing method is characterized by comprising the following steps of: pretreating
plant hollow core bodies and / or flexible porous fillers by using a water glass
adhesive; mixing with inorganic fire-resistant hollow particles; and performing mould pressing, shaping and
drying to obtain the environment-friendly light heat-insulating material. The
hollow core bodies and the flexible porous fillers are arranged multidirectionally; one layer of water glass
adhesive is arranged at least on the surfaces of the
hollow core bodies and the flexible porous fillers; and discontinuous holes are reserved between the hollow core bodies and / or the flexible porous fillers and the inorganic fire-resistant hollow particles. Preferably, the hollow core bodies are rice husks and
straw sections; and the flexible porous fillers are foam and fibers. Renewable
plant resources and recovered foam and
fiber waste are adopted, so the environment-friendly light heat-insulating material is energy-saving and environment-friendly; and a large number of sealed holes are formed among the material particles through the penetration and
coating of the modified water glass
adhesive, and a heat-insulating hydrophobic
corrosion-resistant multi-effect protective layer is provided, so the environment-friendly light heat-insulating material has good fireproof, heat-insulating and heat-preserving effects, high
weather resistance, combined rigidity and
toughness,
low density and low cost.