Ultraviolet light cross-linked high flame-retardant low-smoke halogen-free polyolefin cable material and preparation method thereof

Abstract

The invention discloses an ultraviolet light cross-linked high flame-retardant low-smoke halogen-free polyolefin cable material and a preparation method thereof. The ultraviolet light cross-linked high flame-retardant low-smoke halogen-free polyolefin cable material comprises the following raw material components in parts by mass: 100 parts of a base material, 100-130 parts of a low-smoke halogen-free flame retardant, 5-15 parts of a synergistic flame retardant, 1-3 parts of a cationic initiator, 1-3 parts of a free radical initiator, 1-5 parts of an assistant crosslinking agent, 0.5-1.5 partsof a compound antioxidant, and 1-3 parts of a lubricant. The combination of two different photo-initiation mechanisms is utilized, the crosslinking efficiency is significantly improved, and wire andcable products have shorter production cycle, and more stable heat resistance and mechanical properties. At the same time, the low-smoke halogen-free flame retardant and the flame-retardant synergistare used, so that relatively good flame retardancy can be obtained and the mechanical properties of the material can be improved in the case of a relatively small total amount of the flame retardant.The base material with a specific composition and the lubricant with a specific composition are selected, so that the mechanical properties of the cable material are further improved, the processing performance of the material is improved, and the preparation efficiency is improved.

Description

technical field [0001] The invention relates to an ultraviolet light cross-linked highly flame-retardant low-smoke halogen-free polyolefin cable material and a preparation method thereof, belonging to the field of low-smoke, halogen-free flame-retardant cable materials. Background technique [0002] In recent years, with the development of society, the application occasions of wires and cables have become more and more extensive. At the same time, the requirements for flame retardancy, mechanical properties, electrical properties and environmental protection of wires and cables have also gradually increased. As a substitute for halogen-containing flame-retardant cable materials, low-smoke halogen-free cable materials have a wider range of applications and are more environmentally friendly, but their flame-retardant and mechanical properties face greater challenges. [0003] In the use of general low-smoke halogen-free polyolefin cable materials, due to the low melting point ...

AI Technical Summary

Problems solved by technology

The irradiation crosslinking process is to form free radicals through the electron current irradiated by the sensitizer to cause crosslinking. During the irradiation crosslinking process, due to the large fluctuation of the electron current, it is easy to cause crosslinking. The degree is not uniform, and the cost of irradiation equipment is high, which is not conducive to cost control

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