Chlorine-resistant PE (polyethylene) water supply pipe as well as preparation method and application thereof

Abstract

The invention discloses a chlorine-resistant composition, a PE (polyethylene) water supply pipe prepared from the chlorine-resistant composition and a preparation method of the PE water supply pipe. The chlorine-resistant composition consists of the following components in percentage by weight: 60-80% of A and 20-40% of B, wherein the structural formula of A and the structural formula of B are shown in the specification. The PE water supply pipe consists of the following components in parts by weight: 100 parts of high-density polyethylene, 2-3 parts of carbon black, 0.2-0.5 part of an antioxidant and 0.2-0.6 part of the chlorine-resistant composition. The preparation method of the PE water supply pipe comprises the following steps: stirring at a high speed to mix the high-density polyethylene, the carbon black, the antioxidant and the chlorine-resistant composition in a mixer, and extruding and granulating by using a two-screw extruder; and then delivering a granular mixed material to a single-screw extruder to perform extrusion, and forming in a mold. The PE water supply pipe provided by the invention has very good aging resistance and chlorine resistance, so as to be helpful for prolonging the service life of a PE pipe which is continuously in contact with chlorine-containing tap water.

Description

technical field [0001] The invention relates to the technical field of PE water supply pipes, in particular to a chlorine-resistant PE water supply pipe and its preparation method and application. Background technique [0002] PE pipes have become the second largest consumption of plastic pipes in the world after PVC pipes. Compared with traditional metal pipes and other plastic pipes, PE pipes have the characteristics of low density, high strength-to-mass ratio, low embrittlement temperature, good toughness, good corrosion resistance and insulation, and easy construction and installation. They are widely used in municipal and Building water supply and gas and other fields. [0003] As an urban water supply pipe, its water source generally comes from a water supply plant. The free chlorine in the water may cause certain corrosion to the PE pipe. In long-term use, it will degrade PE and affect the life of the PE water supply pipe. It has been documented that the presence of...

AI Technical Summary

Problems solved by technology

[0003] As an urban water supply pipe, its water source generally comes from a water supply plant. The free chlorine in the water may corrode the PE pipe to a certain extent. In long-term use, it will degrade PE and affect the life of the PE water supply pipe.

It has been documented that the presence of chlorine in water accelerates the plastic destruction process