Anti-aging and antibacterial PE (Polyethylene) water service pipe

Abstract

The invention relates to an anti-aging antibacterial PE (Polyethylene) water service pipe. The anti-aging and antibacterial PE water service pipe comprises an inner layer, a middle layer and an outerlayer which are arranged in sequence from inside to outside, wherein the inner layer, the middle layer and the outer layer are formed by three-layer coextrusion; the inner layer is prepared from the following raw material components in parts by weight: 50 to 150 parts of PE particles, 1 to 10 parts of a dispersing agent, 1 to 10 parts of first color masterbatch and 1 to 20 parts of nano-zinc oxide; the middle layer is prepared from the following raw material components in parts by weight: 50 to 150 parts of the PE particles and 1 to 10 parts of second color masterbatch; the outer layer is prepared from the following raw material components in parts by weight: 50 to 150 parts of the PE particles, 0.5 to 10 parts of hindered amine free radical scavenger, 1 to 10 parts of third color masterbatch and 1 to 10 parts of the dispersing agent. The sufficient mixing and uniformity of the raw material components in all the layers can be ensured, so that tubes can directly be exposed to sunlight for two years and the appearance has no change or blushing.

Description

technical field [0001] The invention belongs to the field of pipelines and relates to a water supply pipe, in particular to an anti-aging and antibacterial PE water supply pipe. Background technique [0002] Since the application of plastic pipes such as HDPE in the last century, after decades of development, the performance has been continuously improved. HDPE water supply pipe has good hygienic performance, excellent corrosion resistance, and long service life. HDPE material is an inert material. Except for a small amount of strong oxidant, it can resist the erosion of many kinds of chemicals, which is better than other water pipes. The advantages of low energy consumption, small water flow resistance, light weight, simple and fast installation, long life, low cost, and thermal insulation performance have rapidly achieved rapid development in the construction of municipal pipe networks. [0003] my country's water supply pipes have also experienced a stage of single quali...

AI Technical Summary

Problems solved by technology

However, after many years of excavation of the PE pipe network, even though the inner wall of the plastic pipe is smoother than the metal pipe and has better self-purification energy, it is still found that a large amount of biological sludge and microorganisms have deposited on the inner wall of the pipe, which has caused secondary pollution to the water quality in the pipe and affected people. drinking water quality

When PE plastic is used and stored outdoors, it is inevitable that the pipe will age due to climatic factors such as light, wind, and rain, and lose its use value.

However, from processing to soil application, pipes have to go through multiple units of processing-purchasing-construction, and their storage environment is complex, and it is difficult to meet the conditions stipulated by the state for covering, storage, transportation and avoiding direct sunlight.

After long-term tracking by our company, it was found that the outer wall of the PE water supply pipe began to change color after being stored outdoors for one year, and the physical performance test performance dropped by 10-20% after two years, which greatly shortened its service life.

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