Production formula for improving flatness of inner wall of PVC (polyvinyl chloride) pipe

Abstract

The invention discloses a production formula for improving the flatness of the inner wall of a PVC (polyvinyl chloride) pipe. The production formula comprises components in parts by mass as follows: 100 parts of PVC resin, 1-2 parts of a silicon modified processing aid, 4-5 parts of a stabilizer, 15-20 parts of activated calcium carbonate, 2-4 parts of titanium dioxide, 0.2-0.4 parts of an internal lubricant and 0.6-0.8 parts of an external lubricant. The production formula for improving the flatness of the inner wall of the PVC (polyvinyl chloride) pipe is safe, non-toxic and pollution-free and has higher environmental protection and safety, with adoption of the PVC-affinity organosilicon processing aid with high degree of polymerization, the physical properties are improved substantially, the melt viscosity can be reduced effectively, the surface glossiness of the pipe is improved, by means of matched use with the internal lubricant and the external lubricant, the friction coefficient of the surface is reduced to a great extent, the anti-abrasion performance of the pipe is improved, and the production quality of the PVC pipe is improved while the problems of low flatness of the inner wall of the pipe, low surface glossiness and high probability of dirt accumulation after long-time use in the prior art are solved.

Description

【Technical field】 [0001] The invention relates to the technical field of PVC pipe production, in particular to a production formula for improving the flatness of the inner wall of the PVC pipe. 【Background technique】 [0002] In recent years, with the development of the economy and the improvement of people's living standards, the biggest hot spot of building water supply and drainage is the wide application of new pipes. People have higher and higher requirements for building functions and sanitary conditions, especially the reasonable selection of pipes plays a vital role in ensuring the use of buildings. At present, the commonly used pipes for building water supply and drainage mainly include plastic pipes, metal pipes and composite pipes. There is an increasing demand for non-polluting new water supply and drainage pipes in the market. [0003] The plastic pipes often used in building drainage pipes are hard polyvinyl chloride pipes, also known as UPVC pipes, which hav...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a production formula for improving the flatness of the inner wall of PVC pipes, which aims to solve the problem of low flatness of the inner wall of the pipe in the prior art, low surface finish, and dirt after long-term use. Easy to accumulate technical problems