▎ 摘　　要

NOVELTY - Modified polymer composite material comprises 45-55 pts. wt. polypropylene, 12-20 pts. wt. high-density polyethylene, 10-30 pts. wt. alkali-free glass fiber, 0.1-1 pts. wt. graphene, 2-6 pts. wt. toughening agent, 2-6 pts. wt. grafting agent, 0.1-0.5 pts. wt. antioxidant, 0.1-0.5 pts. wt. anti-ultraviolet agent, and 3.5-4.4 pts. wt. lubricant. USE - The composite material is useful for bearing seat. ADVANTAGE - The composite material has good comprehensive performance, good advantages and application prospects. The roller bearing seat has engineering plastic grade high strength, low manufacturing cost, easy injection molding, light weight, low requirements on the extruder and wear resistance, and can meet various size requirements through injection molding. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing modified polymer composite material for bearing seats comprising mixing and stirring a formula amount of polypropylene and high-density polyethylene as pellets, mixing graphene, toughening agent, grafting agent, antioxidant, anti-ultraviolet agent and lubricant, stirring as a powder, adding the pellets and powder to the twin-screw extruder for extrusion, adding alkali-free glass fiber to the fibering port of the fourth section of the twin-screw extruder to obtain a modified polymer composite material for bearing seat.