▎ 摘　　要

NOVELTY - An oxidation-resistant polyethylene composite pipe comprises a core pipe that is provided with an aluminum sheet layer. The aluminum sheet layer is provided with an outer layer pipe. The core pipe and the outer layer pipe are made of same material comprising 180-190 pts. wt. polyethylene, 35-40 pts. wt. chlorinated polyethylene, 8-9 pts. wt. dibutyltin dilaurate, 7-10 pts. wt. zinc stearate, 10-15 pts. wt. graphene, carbon black, barium laurate, alkyl phosphoric acid, fluorine grease, bisphenol A type phosphate oligomer, glycidyl methacrylate, monoalkoxy titanate coupling agent, polyethylene terephthalate, hydroquinone, diisodecyl adipate, and masterbatch additive. The oxidation-resistant polyethylene composite pipe is prepared by fixing the core pipe in a processor, winding an aluminum sheet on a surface of the core pipe, leveling by a flat mechanism to form the aluminum sheet layer, forming the outer layer pipe on a surface of the aluminum sheet layer, and cooling. USE - Oxidation-resistant polyethylene composite pipe. ADVANTAGE - The polyethylene composite pipe enhances the anti-UV performance, flame retardance, abrasion resistance, and oxidation resistance of the core tube and outer tube. The service life of the oxidation-resistant polyethylene composite pipe is enhanced. DETAILED DESCRIPTION - An oxidation-resistant polyethylene composite pipe comprises a core pipe that is provided with an aluminum sheet layer. The aluminum sheet layer is provided with an outer layer pipe. The core pipe and the outer layer pipe are made of same material comprising 180-190 pts. wt. polyethylene, 35-40 pts. wt. chlorinated polyethylene, 8-9 pts. wt. dibutyltin dilaurate, 7-10 pts. wt. zinc stearate, 10-15 pts. wt. graphene, 7-9 pts. wt. carbon black, 6-8 pts. wt. barium laurate, 8-10 pts. wt. alkyl phosphoric acid, 5-9 pts. wt. fluorine grease, 10-13 pts. wt. bisphenol A type phosphate oligomer, 6-7 pts. wt. glycidyl methacrylate, 10-15 pts. wt. monoalkoxy titanate coupling agent, 11-16 pts. wt. polyethylene terephthalate, 13-15 pts. wt. hydroquinone, 10-15 pts. wt. diisodecyl adipate, and 9-11 pts. wt. masterbatch additive. The oxidation-resistant polyethylene composite pipe is prepared by fixing the core pipe in a processor, winding an aluminum sheet on a surface of the core pipe, leveling by a flat mechanism to form the aluminum sheet layer, forming the outer layer pipe on a surface of the aluminum sheet layer, and cooling. An INDEPENDENT CLAIM is included for a preparation method of oxidation-resistant polyethylene composite pipe, which involves (1) weighing the above-mentioned raw materials, (2) adding to a high-speed kneader, kneading for 10 minutes at 170 degrees C, feeding the raw materials into a cold mixing machine, stirring until the temperature is 35 degrees C, and blanking, (3) putting the raw materials obtained in the step (2) into the core pipe screw extruder and outer layer pipe screw extruder in the hopper according to the proportion, respectively extruding the forming material into the core pipe mold by the core pipe screw extruder to form, vacuum-sizing and cooling to obtain the core pipe, (4) fixing the core pipe in the fixing mechanism of the processor, putting the rolled aluminum sheet into an unreeling mechanism, winding one end of the aluminum sheet on the core pipe, starting a fifth motor, driving the core pipe to rotate pressing the aluminum sheet by the pressing mechanism, coating the temperature-resistant epoxy glue through a gluing mechanism, heating the aluminum sheet by a heating mechanism, winding on the core pipe, and flattening by a leveling mechanism to form the aluminum sheet layer, and (5) extruding the forming material into the outer layer pipe mold by the outer layer pipe screw extruder, forming the outer layer pipe on a surface of the aluminum sheet layer, and cooling.