A kind of high-efficiency halogen-free flame retardant cable material and preparation method thereof

Abstract

The invention discloses a high-efficiency halogen-free flame-retardant cable material and a preparation method thereof. The high-efficiency halogen-free flame-retardant cable material comprises the following components in terms of mass fraction: ethylene-vinyl acetate copolymer: 15% to 30%, and polyethylene resin: 30%-50%, high-efficiency halogen-free flame retardant 30%-40%, organosilicon compound 1%-3%, anti-aging agent 2%-5%. Among them, the high-efficiency halogen-free flame retardant is composed of diethylphosphinate (poly)amino polyalkylene aluminum phosphate and nitrogen-based compounds. The high-efficiency halogen-free flame retardant used in the invention replaces the traditional aluminum hydroxide flame retardant, and has the characteristics of low filling amount and good flame retardant effect, and does not release a large amount of corrosive gas during combustion, and meets the mechanical requirements of wire and cable. performance requirements. The wire prepared with the cable material of the present invention has the properties of high temperature resistance of 150°C and low temperature of -40°C, and also has the characteristics of halogen-free environmental protection, scratch resistance and high mechanical properties, and meets the standard requirements of UL VW-1 high flame retardant performance. , the market application prospect is broad.

Description

technical field [0001] The invention relates to the technical field of irradiation cross-linked halogen-free flame-retardant XLPE materials, in particular to a high-efficiency halogen-free flame-retardant cable material that meets the UL VW-1 grade standard and a preparation method thereof. Background technique [0002] XLPE is the abbreviation of the English name of cross-linked polyethylene. Polyethylene is a linear molecular structure that is easily deformed at high temperatures. Cross-linked polyethylene is cross-linked by a cross-linking agent, and the linear structure is transformed into a network structure. The XLPE of the net-like three-dimensional structure has excellent heat resistance, strong deformation resistance, good insulation, good mechanical and strong chemical resistance. The product after adding flame retardant can effectively prevent, delay and terminate the flame when attacked by external fire source, so as to achieve the purpose of flame retardant. ...

AI Technical Summary

Problems solved by technology

[0004] At present, the most widely used halogen-free flame retardants on the market are generally inorganic flame retardants such as magnesium hydroxide and aluminum hydroxide, which have the advantages of low price, abundant sources, good smoke suppression effect, and no corrosive gas and other Harmful substances and other advantages, but the addition of such flame retardants is generally 50%-70%, otherwise the flame retardant effect is poor

However, as the amount of addition increases, the mechanical properties of the product will decrease and the processing performance will be relatively poor. The tensile strength of the cable material will not reach 13.8mpa, and the elongation will not reach the requirement of 300%. Wire gauge wire can pass the VW-1 test standard, and small wire gauge wire products with a small outer diameter still cannot pass the VW-1 test standard, and cannot meet the requirements of product structure, wire gauge size and flame retardancy at the same time

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