Halogen-free flame-retardant and anti-static polyethylene material, pipe and preparing method thereof

A halogen-free flame-retardant and anti-static polyethylene material, a pipe and a preparing method thereof belong to the processing field of plastic pipes. The present invention aims to provide a halogen-free flame-retardant and anti-static polyethylene material and a pipe prepared from the material. The halogen-free flame-retardant and anti-static polyethylene material is prepared from 70 to 99 shares of polyethylene, 1 to 30 shares of expanded graphite (EG)/ polyethylene (PE) superfine composite powder, 1 to 30 shares of synergistic flame retardant and 1 to 5 shares of conductive black by the steps of melting and blending at a temperature of 160 DEG C to 200 DEG C, extruding, granulating and drying. The EG/ PE superfine composite powder is made by simultaneously grinding PE and EG with a millstone type mechanochemical reactor, and the granularity of the powder is 1000 meshes. The halogen-free flame-retardant and anti-static polyethylene pipe made from the halogen-free flame-retardant and anti-static polyethylene material prepared according to the present invention has the characteristics of halogen-free flame retardation, high flame-retardant efficiency and excellent comprehensive mechanical properties. Besides, the raw material cost of the halogen-free flame-retardant and anti-static polyethylene pipe can be largely reduced, and the pipe is simply processed and conveniently made.