Flame-retardant PVC cable pipeline and preparation method thereof

Abstract

The invention discloses a flame-retardant PVC cable pipeline and a preparation method thereof. The flame-retardant PVC cable pipeline comprises a flame retardant sleeve layer, which is prepared from the following materials in parts by weight: 30-55 parts of polyvinyl chloride, 6 to 12 parts of polypropylene, 3 to 8 parts of a phenolic resin, 4 to 10 parts of diethyl hexyl peroxydicarbonate, 5 to 7parts of azobisisoheptonitrile, 2 to 6 parts of azodiisobutyronitrile, 1 to 3 parts of barium sulfate whisker, 0.5 to 1 part of nano calcium carbonate, 0.7 to 1.4 parts of nano ceramic powder, 3 to 12 parts of glass fiber, 1 to 1.6 parts of a coupling agent, 6 to 12 parts of a flame retardant, 0.6 to 1.2 parts of an antioxidant, 0.6 to 1.2 parts of a dispersing agent, 0.2 to 0.5 part of a lubricant and 0.4 to 0.8 part of a surfactant, and 0.4-0.8 part of a pigment. According to the invention, the flame-retardant sleeve layer designed by the invention has efficient flame-retardant effect; andthe barium sulfate whiskers, the nano calcium carbonate, the nano ceramic powder, the glass fibers and other inorganic materials are ground into powder, and the powder is mixed and processed, so thatthe overall flame-retardant effect is improved, wherein the raw material cost is low, the processing method is simple, and the flame-retardant sleeve layer is worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of cable duct processing, in particular to a flame-retardant PVC cable duct and a preparation method thereof. Background technique [0002] Polyvinyl chloride, referred to as PVC (Polyvinyl chloride), is a vinyl chloride monomer (vinyl chloridemonomer, referred to as VCM) in peroxides, azo compounds and other initiators; or under the action of light and heat, it can be polymerized according to the mechanism of free radical polymerization. made polymer. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC is a white powder with an amorphous structure, the degree of branching is small, the relative density is about 1.4, the glass transition temperature is 77-90°C, it begins to decompose at about 170°C, and it has poor stability to light and heat. When exposed to sunlight, it will decompose to produce hydrogen chloride, and further autocatalyze t...

AI Technical Summary

Problems solved by technology

[0003] Cables are often used in the power communication industry. At present, more PVC is used to make the protective sheath of cables in China. However, PVC has good insulation, water resistance and stability, but its flame retardancy is poor. Once a fire occurs, it is easy to cause a large number of fires. damage, therefore, here we propose a flame retardant PVC cable duct and its preparation method