| abstract |
The flame-retardant insulating sheath material is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin; 28-52 parts of a high and low temperature resistant plasticizer; 6-10 parts of a calcium-zinc composite stabilizer; 5-30 parts of chlorinated polyethylene; 50-70 parts of an inorganic flame retardant; 8-15 parts of antimony trioxide; 8-12 parts of a flame-retardant synergist; 0.4-0.8 part of antioxidant; and 0.6-1.6 parts of lubricant, putting the raw materials into a high-speed kneader, mixing, transferring the mixture into a double-screw extruder, melting and extruding, cooling and granulating to obtain a finished product. The composite material has the advantages of simple preparation, good flame retardance, good carbon shell forming performance, self-extinguishing performance, low heat release amount and good low-temperature resistance. |