▎ 摘　　要

NOVELTY - Material for high-strength photovoltaic panel cleaning brush roll comprises 18-22 pts. wt. high-density polyethylene, 16-20 pts. wt. polyurethane resin, 2-4 pts. wt. dipropylene glycol monomethyl ether, 3-5 pts. wt. glass fiber, 3-4 pts. wt. basalt fiber, 1-3 pts. wt. titanium dioxide, 1-1.4 pts. wt. graphene, 2-4 pts. wt. white carbon black, 1-1.8 pts. wt. nitrocellulose, 1-2 pts. wt. calcium carbonate, 0.8-1.2 pts. wt. dicumyl peroxide, 2-3 pts. wt. polyvinyl acetate, 1-2 pts. wt. furan resin, 1-3 pts. wt. plasticizer, 0.6-1 pt. wt. dispersing agent and 1-3 pts. wt. antioxidant. USE - As material for a high-strength photovoltaic panel cleaning brush roll. ADVANTAGE - The material has improved strength and low density, and is lightweight and not easy to break. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the material comprising (i) mixing high-density polyethylene and polyurethane resin in a high-pressure reaction kettle for high-temperature and high-pressure modification treatment, adding graphene and calcium carbonate to the reaction kettle to obtain the modified base material, (ii) cooling the modified base material, grinding the modified base material through 80-100 mesh, adding distilled water, glass fiber, basalt fiber and nitrocellulose in an ultrasonic oscillator for homogenization to obtain a homogeneous solution, (iii) adding the homogeneous solution to dipropylene glycol monomethyl ether, titanium dioxide and white carbon black in a grinding machine and grinding and mixing at 100-120 degrees C to obtain a mixed slurry, and (iv) adding the mixed slurry to polyvinyl acetate, furan resin, dicumyl peroxide, plasticizer, dispersing agent and antioxidant in a reaction kettle, uniformly stirring, introducing supercritical carbon dioxide, carrying out heat preservation at 20-22 MPa for a period of time, continuously mixing by mixing machine, and carrying out extrusion molding.