Low-smoke zero-halogen and highly-flame-retardant electric wire and preparation method thereof

Abstract

The invention provides a low-smoke zero-halogen and highly-flame-retardant electric wire. The wire comprises conductors. Shielding layers are arranged outside the conductors, flame-retardant insulation layers are arranged outside the shielding layers, refractory layers are arranged outside the flame-retardant insulation layers, heat-resisting layers are arranged outside the refractory layers, and rock wool ropes fill the portions among the conductors. A flame-retardant belt is arranged outside the conductors and the rock wool ropes, an inner flame-retardant layer is arranged outside the flame-retardant belt, an armor layer is arranged outside the inner flame-retardant layer, an outer flame-retardant layer is arranged outside the armor layer, an anticorrosive coating is arranged outside the outer flame-retardant layer and coated with an ultraviolet-proof layer, and the ultraviolet-proof layer is coated with a protection wax layer. The invention further provides a preparation method of the electric wire. By arranging the flame-retardant insulation layers, the refractory layers, the rock wool ropes, the inner flame-retardant layer and the outer flame-retardant layer, the flame retardance of the electric wire is much better than that of similar products. Meanwhile, the electric wire and the flame-retardant layers are made of zero-halogen substances, so that the electric wire is low in smoke, free of halogen and highly flame-retardant.

Description

technical field [0001] The invention relates to a wire and cable and a preparation method thereof, in particular to a low-smoke, halogen-free, high flame-retardant wire and cable and a preparation method thereof. Background technique [0002] Wire and cable is a wire product used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. The quality of wire and cable directly affects the quality of the project and the safety of consumers' lives and property. Although the wire and cable industry is only a supporting industry, it accounts for 1 / 4 of the output value of China's electrical industry. It has a wide variety of products and a wide range of applications, involving industries such as electric power, construction, communications, and manufacturing, and is closely related to various sect...

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Problems solved by technology

However, PVC contains halogen elements, so it releases corrosive and toxic gases when burned

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