Hard polyvinyl chloride (PVC) pipe for feeding water and production method of hard PVC pipe

Abstract

The invention discloses a hard polyvinyl chloride (PVC) pipe for feeding water and a production method of the hard PVC pipe. The production method comprises the following steps of (1) weighting all raw materials in parts by weight: 80-120 parts of PVC, 0.3-0.8 part of calcium stearate, 0.8-2.0 parts of basic lead sulfate, 0.4-1.0 part of stearic acid, 0.6-1.0 part of dibasic lead phosphite, 0.2-1.2 parts of carbon black and 0.2-0.6 part of lead stearate; (2) after kneading the raw materials in the step (1), carrying out double-roller mixing, smashing and extrusion molding as well as cooling shaping under the conditions that the temperature is 160-180 DEG C, the compression ratio is 2-4, and the length to diameter ratio is 20-25; (3) cutting a cooled product treated in the step (2) to obtain the hard PVC pipe for feeding water. Compared with the prior art, the hard PVC pipe has the following advantages of low price, relatively few raw materials, simple production process, relatively high strength, relatively stable physical property even if at relatively high water pressure, environment friendliness, no pollution and relative safety when used as a water pipe.

Description

technical field [0001] The invention relates to the field of material science, in particular to a rigid polyvinyl chloride pipe for water supply and a production method thereof. Background technique [0002] A pipeline is a device used to transport gas, liquid or fluid with solid particles connected by pipes, pipe connectors and valves. Usually, after the fluid is pressurized by blowers, compressors, pumps and boilers, it flows from the high-pressure part of the pipeline to the low-pressure part, and it can also be transported by the pressure or gravity of the fluid itself. Pipes are widely used, mainly in water supply, drainage, heat supply, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering and various industrial devices. Generally, pipes do not require high toughness, but pipes used in water supply systems have high requirements for toughness, and must maintain good physical properties under high water pressure...

AI Technical Summary

Problems solved by technology

At present, the existing pipes for water supply are not strong enough or not environmentally friendly. When the water pressure is too high, the water pipes are easy to break, and the safety cannot be guaranteed.