A waste polyethylene composition and a preparation method thereof belong to the technical field of waste plastic recycling and processing. It is prepared from the following components in parts by weight: 75~85 parts of PE cap material, 10~20 parts of PE pipe material, 4~5 parts of carbon black masterbatch, 0~0.2 parts of processing aid, 0.05~0.25 parts of crosslinking agent, and 0.18~0.35 parts of antioxidant. The composition of the present invention has high flexural modulus, elongation at break and good processability. The melt strength is 10 times that of recycled cap material, the tensile strength is 25.4~29.4 MPa, and the oxidation induction time is 38~71 min, ensuring good thermal stability and service life of the pipe composition. Besides directly manufacturing pipes, the composition can also be added as a raw material to commercially available special materials for double-wall corrugated pipes to produce large-caliber double-wall corrugated pipes and winding pipes for drainage and sewage with different specifications and calibers, reducing production cost by more than 10%.

Area Code: CN

Application Number: CN201610235809.1