Preparation method of irradiation cross-linking polyolefin insulating material for locomotives

Abstract

The invention belongs to the technical field of insulating materials for locomotives, and particularly relates to a preparation method of an irradiation cross-linking polyolefin insulating material for locomotives, wherein the polyolefin insulating material comprises: 40-50 parts of an ethylene-vinyl acetate copolymer, 20-40 parts of metallocene linear low density polyethylene, 15-25 parts of an ethylene-octene copolymer, 10-20 parts of a maleic anhydride grafted ethylene-octene copolymer, 80-150 parts of modified aluminum hydroxide, 50-80 parts of modified magnesium hydroxide, 50-100 parts ofa triazine flame retardant, 1-2 parts of a coupling agent, 3-8 parts of a lubricant, 0.5-2 parts of a high-temperature-resistant antioxidant, 1-3 parts of a light stabilizer, 2-5 parts of a char-forming smoke suppressant, 8-15 parts of modified bentonite, 10-15 parts of active kaolin powder and 2-5 parts of a cross-linking agent. According to the invention, the prepared polyolefin insulating material has characteristics of excellent heat resistance, excellent aging resistance, high mechanical strength, environmental protection and no toxicity.

Description

technical field [0001] The invention belongs to the technical field of insulating materials for locomotives, and in particular relates to a preparation method of irradiation crosslinked polyolefin insulating materials for locomotives. Background technique [0002] In recent years, the rapid development of urban construction and other industries, as well as the strict requirements of the European Union for environmental protection, considering that the future cables have higher and higher requirements for safety, energy saving, flame retardancy, oil resistance, strength, and weather resistance. In addition, low-voltage power cables In the process of laying through the pipe, it is also easy to be pulled apart and cracked. [0003] In the published Chinese patent documents, there are many patents related to oil-resistant halogen-free flame retardants. For example, the Chinese patent with the publication number CN106700561A discloses a halogen-free flame-retardant protective fil...

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Problems solved by technology

[0005] In order to solve the defect that the polyolefin insulating material for locomotives in the prior art cannot take into account high strength and weather resistance, the present invention provides a method for preparing radiation crosslinked polyolefin insulating material for locomotives, and the prepared polyolefin insulating material Good mechanical performance, outstanding electrical insulation performance, environmental protection and flame retardant, can be applied to oil-resistant cable insulation materials

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