▎ 摘　　要

NOVELTY - Preparing antibacterial recycled plastic involves washing the the recycled plastic to remove large-scale debris on the surface of the recycled plastic, and then crushing the washed recycled plastic. The crushed recycled plastic is washed with detergent, then rinsed with clean water, drained and dried after rinsing, and iron is removed by an electromagnetic iron remover to obtain recycled plastic raw materials. The recycled plastic raw material prepared in the first step is added to the extruder for extrusion granulation to obtain plastic raw material particles, and the plastic raw material particles are added to the mixer. The compatibilizer, antioxidant and light stabilizer are then added, mixed for 20-35 minutes and then extruded and granulated through extruder to obtain recycled mixed plastic particles. USE - Method for preparing antibacterial recycled plastic. ADVANTAGE - The method reduces silver nitrate to produce nano-silver and then fixed on the nano-talc powder, so that the nano-talc powder has antibacterial and antibacterial effects, and then polyurethane is used as an adhesive, fixed the antibacterial filler particles on the surface of graphene oxide, and then reduced the graphene oxide to graphene, and a uniform composite structure of antibacterial filler particles and graphene is prepared, and finally the composite structure is mixed with polypropylene and then extruded and pelletized to obtain an antibacterial masterbatch, and when preparing antibacterial recycled plastics, the antibacterial masterbatch is mixed with recycled plastics and then melted, extruded and pelletized to obtain finished antibacterial particles, and improves the strength and toughness of the antibacterial recycled plastic, and the nano-silver and graphene fixed on the talc powder have a good antibacterial effect and not harm human health. DETAILED DESCRIPTION - Preparing antibacterial recycled plastic involves washing the the recycled plastic to remove large-scale debris on the surface of the recycled plastic, and then crushing the washed recycled plastic. The crushed recycled plastic is washed with detergent, then rinsed with clean water, drained and dried after rinsing, and iron is removed by an electromagnetic iron remover to obtain recycled plastic raw materials. The recycled plastic raw material prepared in the first step is added to the extruder for extrusion granulation to obtain plastic raw material particles, and the plastic raw material particles are added to the mixer. The compatibilizer, antioxidant and light stabilizer are then added, mixed for 20-35 minutes and then extruded and granulated through extruder to obtain recycled mixed plastic particles. The recycled mixed plastic particles, antibacterial masterbatch and lubricant are uniformly mixed according to a certain weight ratio and then added to the six-zone twin-screw extruder for melt extrusion and granulation. The temperature of the first to sixth zones of the extruder is 170 degrees C, 190 degrees C, 210 degrees C, 230 degrees C, 240 degrees C, 200 degrees C, and the screw speed is 140-180 revolutions/minute.