▎ 摘　　要

NOVELTY - Preparing polyethylene mixture containing polyurethane modified powder rubber comprises e.g. adding fluorinated graphene to a perfluoroalkane as a solvent and performing ultrasonic at room temperature, then adding polyurethane, stirring to obtain a polyurethane solution, adding nitrile latex, soft water, polyurethane solution to the container, stirring uniformly, adding anti-aging agent and stirring uniformly, adding demulsifier and stirring uniformly, adding release agent and coagulant, heating and stirring, then washing, dehydrating and drying to obtain nitrile rubber, and adding nitrile rubber, polyethylene, silane coupling agent and phenolic resin, montmorillonite and uniformly mixing, and carrying out the granulation in a twin-screw extruder. USE - The polyethylene mixture containing polyurethane modified powder rubber is useful for 3D printing (claimed). ADVANTAGE - The polyurethane modified powder rubber has excellent tensile yield stress, and tensile fracture stress. DETAILED DESCRIPTION - Preparing polyethylene mixture containing polyurethane modified powder rubber comprises (i) adding fluorinated graphene to a perfluoroalkane as a solvent and performing ultrasonic at room temperature for 15-20 hours, then adding polyurethane, stirring at 20-100 degrees C for 12-24 hours to obtain a polyurethane solution, where the ratio of fluorinated graphene to perfluoroalkane is 0.1-0.6 g/ml, and the ratio of polyurethane to perfluoroalkane is 1-30 g/ml; (ii) adding 100 pts. wt. nitrile latex, 50-80 pts. wt. soft water, 90-110 pts. wt. polyurethane solution to the container, stirring uniformly, adding 0.1-0.6 pts. wt. anti-aging agent and stirring uniformly at 0-10 degrees C, adding 50-100 pts. wt. demulsifier and stirring uniformly, adding 10-30 pts. wt. release agent and 10-40 pts. wt. coagulant, heating to 60-90 degrees C and stirring for 1-3 hours, then washing, dehydrating and drying to obtain nitrile rubber; and (iii) adding 5-10 pts. wt. nitrile rubber, 100 pts. wt. polyethylene, 0.2-0.5 pts. wt. silane coupling agent and 0.1-0.5 pts. wt. phenolic resin, 0.1-0.5 pts. wt. montmorillonite and uniformly mixing at 150-200 degrees C, and carrying out the granulation in a twin-screw extruder.