Double-layer coextruded insulation LED ultraviolet crosslinking colored low-smoke halogen-free flame-retardant cable material and preparation method thereof

Abstract

The invention discloses a double-layer coextruded insulation LED ultraviolet light crosslinking colored low-smoke halogen-free flame-retardant cable material. The cable material is composed of an inner-layer insulating material and an outer-layer insulating material, and the inner-layer insulating material is composed of a maleic anhydride grafted ethylene-octene copolymer, polyethylene, an ethylene-octene copolymer, a flame retardant, a flame retardant synergist, an antioxidant, a metal deactivator, a lubricant, a photoinitiator, a multifunctional group cross-linking agent and a color masterbatch; and the outer-layer insulating material is composed of maleic anhydride grafted polyethylene, an ethylene-vinyl acetate copolymer, syndiotactic 1,2-polybutadiene, the flame retardant, the flameretardant synergist, the antioxidant, the lubricant, the photoinitiator, the multifunctional crosslinking agent and the color master batch. The double-layer coextruded inner-layer insulating materialand the outer-layer insulating material are extruded, and then can be fast crosslinked online through LED irradiation equipment, various properties of cables can meet JG / T 441-2014, the mechanical properties and the electrical properties of the cable are excellent, the flame retardant property is good, and the service life of the cable can reach 70 years or longer.

Description

technical field [0001] The invention relates to the field of radiation cross-linked double-layer co-extruded cable material, and more specifically relates to a double-layer co-extruded insulating LED ultraviolet light cross-linked color low-smoke halogen-free flame-retardant cable material and a preparation method thereof. Background technique [0002] With the progress and development of the times, the power and variety of household appliances continue to increase, and the overload operation of wires is normalized. Due to the limitations of the technology, process, materials and other factors at that time, the traditional PVC cloth wire has a low temperature resistance level and is difficult to use. The short life span is only 25 years, and the halogen-free flame retardant used in the new single-layer low-smoke halogen-free insulation material is very easy to absorb moisture, resulting in a decrease in its insulation resistance. [0003] The safety of building wires is rela...

AI Technical Summary

Problems solved by technology

Due to the thermal action of the insulating layer of the wire during normal operation, thermal oxidation and cracking of the insulating material will occur, eventually aging and causing safety accidents such as leakage and fire. Due to the high price of the cable, changing the line midway will cause damage to the building structure. The power supply cables under the road are often overused, and it is imminent to realize the long life of the wires

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