Architectural high-insulativity low-smoke halogen-free flame-retardant cable material and preparation method thereof

The invention relates to an architectural high-insulativity low-smoke halogen-free flame-retardant cable material which is prepared from the following raw materials in parts by weight: 0.9-1.1 parts of hollow glass microsphere, 1-1.5 parts of silane coupling agent KH-550, 0.5-1 part of molybdenum disulfide, 20-25 parts of magnesium hydroxide, 20-25 parts of aluminum hydroxide, 9-10 parts of polyacrylonitrile, 6-7 parts of polylactic acid, 3-4 parts of polyoxyethylene, a right amount of dimethylformamide, a right amount of double solvent composed of dimethylformamide and dichloromethane in a volume ratio of 1:1, a right amount of methyl methacrylate, a right amount of isopropyl thioxanthene ketone, 50-55 parts of crosslinked polyethylene and 4-5 parts of metallocene polyethylene. The hollow glass microsphere enhances the insulativity, heat resistance and lubricating property of the cable material, so that the cable material can be extruded and processed more easily. The silane coupling agent KH-550 is added to enhance the binding force between the hollow glass microsphere and resin. The technique solves the problem of the phenomenon of agglomeration due to nonuniform dispersion of the inorganic filler.