The invention discloses a modified weather-resistant high-density
polyethylene sheathing compound for bridge cables. A method for preparing the modified weather-resistant high-density
polyethylene sheathing compound includes mixing ultrahigh-molecular-weight
polyethylene, high-density polyethylene, linear low-density polyethylene, low-density polyethylene, antioxidants and
polyethylene wax with one another in high-speed mixers at normal temperatures to obtain mixtures, discharging the mixtures into parallel double-screw
granulation units, melting and extruding the mixtures, granulating the mixtures under
underwater conditions to obtain particles, dehydrating the particles, and then
drying the particles to obtain modified high-density polyethylene particles; mixing the obtained modified high-density polyethylene particles, high-density polyethylene,
carbon black parent materials, antioxidants and
silicone parent materials with one another in the high-speed mixers at normal temperatures to obtain mixtures, discharging the mixtures into the parallel double-screw
granulation units, melting and extruding the mixtures, granulating the mixtures under
underwater conditions to obtain particles, dehydrating the particles, and
drying the particles to obtain the modified weather-resistant high-density polyethylene black sheathing compound for the bridge cables. The modified weather-resistant high-density polyethylene sheathing compound and the method have the advantages that the sheathing compound is excellent in physical and mechanical properties, in particular, the
ultraviolet resistance property and the
environmental stress cracking resistance property, and various indexes of manufactured products conform to requirements of standards CJ / T297-2008 of
housing construction departments.