A kind of chlorine peroxide-resistant cross-linked polyethylene pipe and its preparation method

Abstract

The invention discloses a chlorine-resistant peroxide crosslinked polyethylene tubular product and a preparation method thereof. By adding an acid remover, chlorine ions in water can be fully removed, so that a strong oxidation action on the plastic tubular product by chlorine ions in water is avoided, and the service life of the tubular product is prolonged; and by mixing two types of high density polyethylene resin, the two types of high polyethylene resin are complemented in performance and fully exert the excellent characteristics of the raw materials, so that the degree of crosslinking and the oxidation induction time of the tubular product can be taken into consideration at the same time. According to the preparation method, consumption of free radicals captured by an antioxidant is accelerated through high-temperature and high-speed production, so that the purposes of high degree of crosslinking and high chlorine-resistant performance are achieved. The peroxide crosslinked polyethylene tubular product disclosed by the invention can meet the demands on national standards GB / T 18992.2-2003 and Australian standards AS / NZS 2492:2007 at the same time, and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a chlorine peroxide-resistant cross-linked polyethylene pipe and a preparation method thereof. Background technique [0002] Plastic pipes have the advantages of energy saving and environmental protection, light weight and high strength, corrosion resistance, smooth inner wall without scaling, easy construction and maintenance, and long service life. They are widely used in construction and municipal water supply and drainage, gas, heating and other fields. The design service life of plastic pipes is generally 50 years, and the aging resistance test generally only considers the thermal oxygen aging environment of the pipes. However, in the actual use environment of the pipe, the water transported may be disinfected with liquid chlorine, chlorine dioxide, chloramine, etc., and the disinfectant reacts with water to produce hypochlorous acid with strong oxidizing properties, w...

AI Technical Summary

Problems solved by technology

However, in the actual use environment of the pipe, the water transported may be disinfected with liquid chlorine, chlorine dioxide, chloramine, etc., and the disinfectant reacts with water to produce hypochlorous acid with strong oxidizing properties, which kills bacteria and at the same time, It also has a strong oxidation effect on the pipe, which will greatly shorten the service life of the pipe

[0003] At present, in order to improve the chlorine resistance of polyethylene plastic pipes, the amount of antioxidants will be increased, but for peroxide crosslinked polyethylene, antioxidants will capture free radicals generated by the decomposition of peroxide crosslinking agents, resulting in The cross-linking efficiency of the product decreases, and too low cross-linking will reduce the pressure resistance of the pipe

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