HIGH FLAME RETARDANCY COMPOSITE MATERIAL FOR HIGH VOLTAGE CABLE OF NEW ENERGY AUTOMOBILE, AND PREPARATION METHOD THEREOF

摘要

The present invention relates to a high flame retardancy composite material for a high voltage cable of a new energy automobile, the high flame retardancy composite material comprising the following raw materials in parts by weight: 5-25 parts of polyethylene resin; 25-50 parts of polyolefin elastomer; 30-50 parts of ethylene-vinyl acetate copolymer; 8-20 parts of chlorinated polyethylene; 30-60 parts of composite flame retardant; 0.2-15 parts of wear-resistant flame retardant synergist; 0.7-2.5 parts of antioxidant; 1-2 parts of lubricant; and 1.5-3 parts of cross-linking sensitising agent. The formulation of the present invention is improved, for example by using a mixture of bimodal polyethylene and high melt index high density polyethylene as a polyethylene resin and chlorinated polyethylene as a modifier, adding polyolefin elastomer and ethylene-vinyl acetate copolymer, and additionally adding a composite flame retardant, a flame retardant synergist, and an antioxidant, such that the composite material of the present invention has better flame retardancy properties and burns at a UL94 V0 grade whilst retaining the flexibility, high temperature resistance, oil resistance, and flame retardancy of high voltage cable material for use in a new energy automobile, and having excellent extrusion processing properties.