The invention relates to a cable material and in particular relates to an inorganic modified
high heat-resistant low-shrinkage low-
smoke halogen-free
flame retardant
polyolefin cable material and a preparation method thereof. The formula of the inorganic modified
high heat-resistant low-shrinkage low-
smoke halogen-free
flame retardant
polyolefin cable material comprises 100 parts of matrix resin, 120-160 parts of
fire retardant, 10-30 parts of inorganic imvite, 1-4 parts of
lubricant and 1-3 parts of
antioxidant; the preparation method of the cable material comprises the steps of firstly, stirring the raw materials in a high-speed mixer evenly, secondly, banburying in a temperature interval from 110 to 130 DEG C by use of a Banbury mixer, and then feeding by use of a twin-screw feeder, extruding by use of double screws, molding by use of a single screw, hot
cutting and pelleting by use of a
grinding surface, conveying by use of a
cyclone separator, sieving by use of a vibrating
sieve and then packaging to obtain the finished inorganic modified
high heat-resistant low-shrinkage low-
smoke halogen-free
flame retardant
polyolefin cable material. Compared with a common low-smoke halogen-free flame retardant polyolefin cable material, the
thermal aging resistance of the inorganic modified high heat-resistant low-shrinkage low-smoke halogen-free flame retardant polyolefin cable material is improved and the shrinkage performance of the cable material is greatly improved, and therefore, the problem of easy shrinkage of the low-smoke halogen-free polyolefin cable materials at high temperatures is solved.