Molding Technology and Fire-retardant Properties of LDPE/LLDPE/APP/Sb_2O_3 Systems

Low density polyethylene and linear low density polyethylene were used as basic materials,ammonium polyphosphate and diantimony trioxide were added into them as fire-retardant agent content to prepare fire-retardant system.The molding technological parameters and fire-retardant performance of the fire-retardant systems were tested.The results showed that with increase of fire-retardant agent content,the rotational speed of main screws needed decreases gradually and the pulling speed decreases accordingly;small change of the rotational speed of main screw causes the pressure of die increases sharply,and the real extrusion temperature increases accordingly;when the fire-retardant addition dosage is 40%,the fire-retardant level can reach FV-0.