▎ 摘　　要

NOVELTY - Preparing environmentally-friendly modified polyurethane photovoltaic cable with high weather resistance and cracking resistance involves using cable core, insulation layer and protective layer. The insulation layer pellets and the protective layer pellets are extruded through a double-layer co-extruder, then wrapped on the surface of the cable core, formed, air-cooled, winded, then wires are irradiated to obtain the environmentally-friendly modified polyurethane photovoltaic cable with high weather resistance and crack resistance. The multi-walled carbon nanotubes weighed are treated with a coupling agent, then graphene and nano aluminum hydroxide are loaded on the multi-walled carbon nanotubes, the graphene and nano aluminum hydroxide are loaded on the multi-walled carbon nanotubes with polyoxyethyl benzoate. USE - Method for preparing environmentally-friendly modified polyurethane photovoltaic cable with high weather resistance and cracking resistance. ADVANTAGE - The method has good toughness, no cracking phenomenon and good fire resistance, meets the use requirement of the user, prolongs the service life of the photovoltaic cable, provides good weather resistance for the photovoltaic cable, reduces the damage generated by the processing of the protective layer and ensures the environment-friendly performance of the photovoltaic cable. DETAILED DESCRIPTION - Preparing environmentally-friendly modified polyurethane photovoltaic cable with high weather resistance and cracking resistance involves using cable core, insulation layer and protective layer. The insulation layer pellets and the protective layer pellets are extruded through a double-layer co-extruder, then wrapped on the surface of the cable core, formed, air-cooled, winded, then wires are irradiated to obtain the environmentally-friendly modified polyurethane photovoltaic cable with high weather resistance and crack resistance. The multi-walled carbon nanotubes weighed are treated with a coupling agent, then graphene and nano aluminum hydroxide are loaded on the multi-walled carbon nanotubes, the graphene and nano aluminum hydroxide are loaded on the multi-walled carbon nanotubes with polyoxyethyl benzoate. The intermediate is obtained by coating the multi-walled carbon nanotubes of nano aluminum hydroxide. The intermediate is mixed with polymethyl methacrylate and processing aids and then cross-linked and extruded with an extruder to obtain polymethyl methacrylate. The protective layer weighs the following raw materials, added polyurethane, environmentally friendly stabilizer, impact modifier, reinforcing fiber, lubricant, antioxidant and light stabilizer weighed to the mixer for mixing to obtain mixture A, added to mixture A and processing auxiliary agent, magnesium hydroxide and phosphorus-based flame retardants, mixed to obtain mixture B, and finally added color masterbatch and mix to obtain product.