Intumescent halogen-free flame retardant pp/eva composite wire and cable and preparation method thereof

Abstract

The invention provides an expansion halogen-free flame-retardant PP / EVA (polypropylene / ethylene-vinyl acetate) wire and cable composition which comprises conductors. A shielding layer is arranged on the outside of each conductor, a PP / EVA composite insulating layer is arranged on the outside of each shielding layer, a high-temperature-resistant layer is arranged on the outside of each PP / EVA composite insulating layer, an expansion layer is arranged on the outside of each high-temperature-resistant layer, spaces among the conductors are filled with a filler rope made of flame-retardant glass fibers, a flame-retardant belt is arranged on the outsides of the integral conductors and the filler rope made of the flame-retardant glass fibers, an expansion belt is arranged on the outside of the flame-retardant belt, a PP / EVA composite protection layer is arranged on the outside of the expansion belt, a waterproof and anticorrosion layer is arranged on the outside of the PP / EVA composite protection layer, a radiation-resistant layer is coated on the outside of the waterproof and anticorrosion layer, and an abrasion-resistant layer is arranged on the outside of the radiation-resistant layer. The invention further provides a method for manufacturing the expansion halogen-free flame-retardant PP / EVA wire and cable composition. The expansion halogen-free flame-retardant PP / EVA wire and cable composition and the method have the advantage that the expansion halogen-free flame-retardant PP / EVA wire and cable composition is provided with the multiple expansion layers, the expansion belt and flame-retardant layers.

Description

technical field [0001] The invention relates to a wire and cable and a preparation method thereof, in particular to an expandable halogen-free flame-retardant PP / EVA composite 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 ...

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Problems solved by technology

[0007] At present, expansion cables are used more and more in daily life, but the research on its halogen-free flame retardant is still relatively lacking.

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