Cold-resistant anti-UV low-smoke halogen-free flame-retardant sheath material

Abstract

The invention provides a cold-resistant anti-UV low-smoke halogen-free flame-retardant sheath material which contains the following components in parts by weight: 100 parts of polyethylene resin, 50-150 parts of EVA, 15-25 parts of a compatilizer, 35-50 parts of a flame retardant, 0.1-0.4 part of an antioxidant, 0.5-1 part of a dispersing agent, 0.03-0.08 part of an anti-UV absorption agent, 2-3 parts of carbon black, 0.1-0.4 part of a metallic ion inhibitor and 0.1-0.6 part of a lubricant. In the invention, the components are mixed in a plastic high-speed mixer, plasticized and granulated in a plastic extruder and then subject to secondary processing by a wire and cable plant to finally obtain the wire and cable products. The obtained wire and cable products have the advantages of excellent heat resistance, high mechanical strength, stress-crack resistance, flame retardance, thermal deformation resistance, weather resistance and other comprehensive performances as well as environmental protection and no pollution, thus protecting health of production personnel and prolonging the service life of the product. The product of the invention can be used as a civil building input wire, a mine cable, a wire for a nuclear power station, an automotive ignition wire, a control cable, a signal cable and a communication cable.

Description

technical field [0001] The invention relates to a sheath material for wires and cables, in particular to a cold-resistant, ultraviolet-resistant, low-smoke, halogen-free, and flame-retardant sheath material, which belongs to the technical field of cable sheath materials. Background technique [0002] There are two types of polymer materials currently used for cables: halogen-containing rubber and plastic materials, represented by polyvinyl chloride. The other is halogen-free rubber and plastic materials, such as polyethylene, cross-linked polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene rubber, butyl-propylene rubber, and nitrile rubber. Relevant data show that 80% of the people killed in fire accidents were not killed by fire, but were poisoned to death by smoke or poisonous gas produced during the burning process. Although halogen-containing materials have good flame retardancy, they will produce highly corrosive and toxic hydrogen halide and other gases...

AI Technical Summary

Problems solved by technology

Although halogen-containing materials have good flame retardancy, they will produce highly corrosive and toxic hydrogen halide and other gases when burned, and the smoke is very large, which affects people's escape in fire and pollutes the environment

Non-flame retardant, halogen-free materials, once burned, will lead to the spread of fire

However, under normal circumstances, the flame retardant properties of thermoplastic halogen-free low-smoke flame-retardant cable materials are often inversely proportional to their physical and mechanical properties and extrusion processing technology.

Due to the addition of a large amount of inorganic flame retardant fillers to meet its flame retardant properties, the original physical and mechanical properties and flexibility of the polymer are greatly reduced, making the cable show various defects, such as easy cracking, tensile strength elongation Low rate, low temperature resistance, etc.