Polymer alloy for manufacturing plastic pipeline insert

Abstract

The invention relates to a polymer alloy for manufacturing a plastic pipeline insert, mainly comprising the following components of poly-2, 6 dimethyl-1,4 phenylate, graft-type impact strength heat-resistant polystyrene, a liquid crystal polymer, styrene / ethylene-butylene / styrene segmented copolymer, a metallocene polyolefin elastomer, as well as auxiliaries, polyvinylidene fluoride, calciumstearate, liquid paraffin and antioxidant for improving the processability of the polymer alloy. The polymer alloy provided by the invention has high heat distortion temperature, melting point temperature and decomposition temperature, low low-temperature brittle temperature, low and constant forming shrinkage ratio, low density, light weight and good mechanical property and processability; the plastic pipeline insert manufactured by adopting the polymer alloy provided by the invention has the production cost of only 1 / 8 that of a copper insert, 1 / 6 of that a stainless steel insert and 1 / 5 that of a cast iron insert, is free from corrosion and pollution, can bear water pressure below 5MPa, can be used for a long time under the conditions of cold and hot water and has the service life up to 50 years and an extremely high application value.

Description

technical field [0001] The invention belongs to the technical field of engineering plastic alloy preparation, and more specifically relates to a polymer composite material used for processing and manufacturing plastic pipe inserts. Background technique [0002] The existing plastic pipe inserts are all metal inserts, such as copper alloy inserts, stainless steel inserts and cast iron inserts, mainly copper alloy inserts. Metal inserts are prone to rust and breed microorganisms during use. Most copper alloy inserts contain a large amount of lead, zinc and other metals. When used in tap water pipes, they will pollute the water quality and be harmful to human health. The growth of microorganisms will easily cause pipe blockage , In the copper alloy insert, when the metal content such as lead and zinc is too large, the strength of the insert is greatly reduced, the insert is easily damaged, and the pipeline leaks. In addition, the specificity of the metal insert is large, and th...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this polymer alloy material is that it is not suitable for water supply pipe inserts because glass fiber is harmful to health, and when the glass fiber content is low, the dimensional stability of these plastic inserts is not easy to meet the requirements for use. When the water is supplied to the pipeline, its inserts are affected by thermal expansion and contraction, causing the pipeline to leak

In addition, the polymer alloy material uses polyphenylene sulfide as the base material, and the price of polyphenylene sulfide is relatively expensive, so the cost of producing the polymer alloy material is relatively high, so the price of the remanufactured insert is also relatively expensive

Images