A kind of high flame-retardant composite material for new energy high-voltage line and preparation method thereof

Abstract

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.

Description

technical field [0001] The invention relates to a high flame-retardant composite material for new energy high-voltage lines and a preparation method thereof. Background technique [0002] With the rapid development of my country's new energy vehicle production and sales, the demand for polymer composite products related to automotive wiring harnesses is becoming more and more urgent. Materials for high-voltage wires are selected according to different customer needs. Different standards, such as ISO6722, GB / T 1037 etc. Performance requirements such as flame retardant, tear resistance, oil resistance, high temperature resistance, high-speed extrusion and other technical characteristics have become the focus and trend of this type of product development. At present, the materials of high-voltage cables in vehicles mainly include radiation cross-linked polyolefin (XLPO) and thermoplastic elastomer (TPE). Compared with thermoplastic elastomers, radiation cross-linked polyolefin m...

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Problems solved by technology

The Chinese patent with the publication number CN104262883A discloses a low-smoke halogen-free flame-retardant silane cross-linked cable material that can be cross-linked at room temperature. The raw material formula of the cable material includes 30-50 parts of polyolefin elastomer, linear low-density poly 10-30 parts of vinyl resin, 15-30 parts of ethylene-vinyl acetate copolymer resin, 5-15 parts of functional polyolefin resin, 120-160 parts of flame retardant, 1.2-3 parts of unsaturated silane, 0.06-3 parts of grafting initiator 0.3 parts, 0.5-2 parts of antioxidant, 1.5-6 parts of processing aid, a large amount of flame retardant is added to the cable material, so that the product has good flame retardancy, but the addition of a large amount of flame retardant will affect other performance, and the oil resistance and softness of the cable material can not be guaranteed to meet the performance of high-voltage cables

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