Environment-friendly light heat-insulating material and manufacturing method thereof

Abstract

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.

Description

technical field [0001] The invention relates to a heat-insulating and fire-proof material, in particular to an environment-friendly light-weight heat-insulating material that can be used for fire-proof doors, wall insulation and partitions. Background technique [0002] Existing lightweight heat insulation materials used as fire door cores generally use expanded perlite, expanded vermiculite sheets and magnesium oxychloride foamed sheets with water glass as the adhesive. Expanded perlite and expanded vermiculite have good high temperature resistance , but the energy consumption of the raw material production process is high, the density of the board produced is too high, brittle, easy to break, and easy to drop slag; the foamed magnesium oxychloride can reduce the density of the board, but the production cycle is long, and the water and moisture absorption is strong. Free chlorine ions are corrosive to metal plates, and the high temperature resistance is not ideal. Harmful c...

AI Technical Summary

Problems solved by technology

[0002] Existing lightweight heat insulation materials used as fire door cores generally use expanded perlite, expanded vermiculite sheets and magnesium oxychloride foamed sheets with water glass as the adhesive. Expanded perlite and expanded vermiculite have good high temperature resistance , but the energy consumption of the raw material production process is high, the density of the board produced is too high, brittle, easy to break, and easy to drop slag; the foamed magnesium oxychloride can reduce the density of the board, but the production cycle is long, and the water and moisture absorption is strong. Free chlorine ions are corrosive to metal plates, and the high temperature resistance is not ideal. Harmful chlorine gas will be produced during high temperature pulverization, and like perlite and vermiculite, magnesium chloride and magnesium oxide are limited mineral resources; currently used as Most of the lightweight insulation materials for wall insulation are polystyrene, polyurethane and other organic foam boards, which have the advantages of small thermal conductivity and low density, but they are all flammable materials. Polystyrene produces molten droplets when burned, and polyurethane burns to produce a large amount Thick smoke poses a serious fire hazard, and its waste pollutes the environment; the production of organic foam materials also consumes increasingly depleted and non-renewable fossil resources, which is energy-consuming and not environmentally friendly; most of the existing frame-filled walls and partitions Cement or magnesium oxychloride is used as cementing material, and expanded perlite, expanded vermiculite, hollow ceramsite and / or floating beads are used as fillers, with high density and insufficient toughness

Chinese patent 200810197751.1 provides a "fireproof and environmentally friendly wallboard" containing plant straw, which adds 2%-20% expanded vermiculite, 8%-32% plant powder, 5%-20 % fly ash, 2%-8% refractory agent and 1%-10% composite additive, the refractory agent contains water glass, which enhances the fire resistance, water resistance and moisture resistance and toughness of the wallboard, but because it is made of cement or chlorine Magnesium oxide is used as the cementing agent, and the straw is powder. During the long-term cementation process, the space between the straw powder and the filler and between the fillers is almost filled with glue. Although the toughness has improved, the density has not decreased much. The production cycle It is also longer, and the effect of heat insulation and heat preservation needs to be improved.

Sodium silicate is an environmentally friendly, cheap adhesive with good flame retardant effect, and its fully cured film layer has a certain waterproof effect, but because the adhesive film structure is mesh-shaped, it not only affects the fire resistance, After being damp, due to the capillary action of the mesh of the film layer, the molecules of the inorganic active ingredients dissolve and migrate, and the waterproof, insect-proof and mildew-proof effects are also difficult to guarantee

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