Nontoxic chlorinated polyvinyl chloride pipe and preparation thereof

Abstract

The invention discloses a novel nontoxic chlorinated polyvinyl chloride tube that has high strength, high temperature resistance, corrosion resistance and flame retardance and is applied to drinking water or hot water delivery. The tube consists of the following ingredients according to parts by weight: 100 parts of CPVC resin, 3-8 parts of stabilizer, 1-3 parts of lubricant, 1-4 parts of processing modified additive, 5-12 parts of impact modifier and 5-20 parts of filling agent. The invention also provides a method for preparing the chlorinated polyvinyl chloride tube, which comprises the steps of: kneading all the ingredients and uniformly dispersing the ingredient into a mixture, and implementing extrusion, plasticization and molding to obtain the tube. The tube has the vicat softening temperature not lower than 110 DEG C, good corrosion resistance, ageing resistance and flame retardance, not only resists the corrosion of strong acid, strong alkali and salt water, but also has higher mechanical strength and tenacity and is not chloridized and corroded by remaining chlorine in water. The novel nontoxic chlorinated polyvinyl chloride tube is widely applicable to chemical corrosion resistance and hot water or drinking water delivery in daily life and has wide application prospect.

Description

technical field [0001] The invention relates to a non-toxic chlorinated polyvinyl chloride pipe and a preparation method thereof, in particular to a non-toxic chlorinated polyvinyl chloride pipe which can be used for transporting drinking water and a preparation method thereof. Background technique [0002] The commonly used plastic pipes in the hot water delivery in the prior art are aluminum-plastic composite pipes and random copolymerized polypropylene pipes (PPR) or PE-RT pipes, because these pipes have poor corrosion resistance and poor flame retardancy , pipe wall thickness and other shortcomings, it is difficult to adapt to the growing economic requirements, so the demand for developing new high-quality plastic hot water pipes is very urgent. [0003] Chlorinated Polyvinyl Chloride (CPVC) is a material with excellent performance, which can be used to manufacture high-temperature corrosive medium transportation, hot water supply systems and pipelines with fire protecti...

AI Technical Summary

Problems solved by technology

However, its processing is very difficult. During extrusion processing, a secondary mixing system is required. The temperature control accuracy is 3-5°C. The screw must have a cooling device, the mandrel of the machine head must also have a cooling device, and the parts in contact with the material must be Chromium plating or stainless steel, small compression angle, good streamlined shape, high power equipment and many other harsh conditions that affect production efficiency

In the