PVC (polyvinyl chloride) composite water drainage tube

Abstract

The invention discloses a PVC (polyvinyl chloride) composite water drainage tube, relates to the field of water drainage tubes for building water supply and drainage, and aims to solve the problem that performances such as strength, corrosion resistance and the like are not ideal. The tube wall of the PVC composite water drainage tube is a composite structure consisting of an inner layer, a middle layer and an outer layer, wherein the thickness of the middle layer is greater than or equal 5 / 8 of the total thickness of the tube wall but less than or equal to 3 / 4 of the total thickness of the tube wall; each of the inner layer and the outer layer is prepared from the following raw materials comprising the following components in parts by weight: 80-120 parts of PVC, 30-45 part of activate calcium carbonate, 0.7-1 part of PE (polyethylene) wax, 0.6-0.9 part of stearic acid and 4-6 parts of a stabilizer; and the middle layer is prepared from the following raw materials comprising the following components in parts by weight: 45-120 parts of ASA (acrylonitrile styrene acrylate) reclaimed materials, 0.4-1 part of PE wax, 0.3-1 part of stearic acid and 2-4.8 parts of a stabilzier. The tube has extremely good performances such as corrosion resistance, ageing resistance and the like, and the manufacturing cost is reduced by at least 50% in comparison with that of similar products.

Description

technical field [0001] The invention relates to the technical field of drainage pipes for building water supply and drainage, in particular to a PVC drainage pipe with a composite structure. Background technique [0002] With the continuous progress of new material technology, the alternative technology of "replacing steel with plastic" has become the development trend of the application materials of building water supply and drainage engineering in my country. The heavy cast iron drainage pipes that have been used in building water supply and drainage engineering for nearly a century have gradually been eliminated and replaced. It's a plastic drain. Among the plastic drainage pipes, PVC drainage pipes are the most widely used, and its consumption has been far ahead of the plastic drainage pipes, and it is still increasing year by year with a growth rate of 8%. [0003] PVC drainage pipe is also called polyvinyl chloride drainage pipe. It is usually a single-layer pipe made ...

AI Technical Summary

Problems solved by technology

At present, most of the domestic PVC drainage pipes are processed and manufactured according to the production methods of the 1990s. The raw materials used to make the pipes are divided into two types, one is to use PVC plus ordinary calcium carbonate as the main raw material, and the other is to use recycled PVC and calcium carbonate are the main raw materials; the cost of PVC drainage pipes manufactured with the former as the main raw material is relatively high, and its strength, toughness, corrosion resistance, heat resistance and other physical and chemical properties are average; the latter is the main raw material Although the cost of the manufactured PVC drainage pipe is low, its color is not white, the internal and external finish is rough, and its physical and chemical properties such as strength, toughness, corrosion resistance, and heat resistance are poor, and it has impact resistance and UV resistance. And antifreeze, high temperature resistance and other aspects of performance are also relatively poor

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