Flame-retardant PP (polypropylene) pipe

Abstract

The invention discloses a flame-retardant PP (polypropylene) pipe which comprises a body. The body comprises an inner layer, a composite reinforcement layer and a flame-retardant layer sequentially from inside to outside. The inner layer is prepared from 2-4 parts of a calcium-zinc stabilizing agent, 4-5 parts of ACR, 2-3 parts of PE wax, 10-15 parts of nitrile rubber, 6-8 parts of chlorinated polyethylene, 2-3 parts of graphite, 2-3 parts of microcrystalline wax, 8-10 parts of nano calcium carbonate, 4-5 parts of titanium dioxide, 160-180 parts of PP resin and 3-4 parts of calcium stearate. The flame-retardant layer is prepared from 5-10 parts of vinyl acetate, 0.2-0.3 part of stearic acid and 20-25 parts of light calcium carbonate. The flame-retardant PP pipe has advantages that flame resistance is improved by the flame-retardant layer, high heat resistance, ageing resistance and impact resistance of the PP pipe are achieved due to the inner layer and the composite reinforcement layer, toughness improvement of the PP pipe is realized, and the service life of the PP pipe is prolonged.

Description

technical field [0001] The invention relates to a PP pipe, in particular to a flame-resistant PP pipe. Background technique [0002] As we all know, polypropylene (PP) has the advantages of wide sources, excellent comprehensive performance, and wide application range. It is widely used in pipe production, but at the same time, its flame retardancy, rigidity, and poor thermal insulation characteristics restrict its further application. For example, the pipes used in coal mines and plastic pipes used in electrical engineering have very strict requirements for flame retardancy, and they need to be under a hoop stress of 20 degrees and 35 MPa to ensure that the pipes have no leakage and damage. Therefore, it is necessary to improve the PP pipe so that He is more in line with the requirements of flame retardancy and compression resistance. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art,...

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Problems solved by technology

[0002] As we all know, polypropylene (PP) has the advantages of wide sources, excellent comprehensive performance, and wide application range. It is widely used in pipe production, but at the same time, its characteristics of insufficient flame retardancy, weak rigidity, and poor thermal insulation restrict its further application. For example, the pipes used in coal mines and plastic pipes used in electrical engineering have very strict requirements for flame retardancy, and they need to be under a hoop stress of 20 degrees and 35 MPa to ensure that the pipes are free from leakage and damage. Therefore, it is necessary to improve the PP pipe so that He is more in line with the requirements of flame retardant and pressure resistance

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