A compound capable of improving the quality and processability of PVC-M pipes and its preparation method

Abstract

The invention discloses a compound capable of improving quality and processability of a PVC-M pipe and a preparation method of the compound. The compound is prepared from raw materials in parts by weight as follows: 100-120 parts of PVC resin, 0.4-1.0 part of a heat stabilizer, 3-8 parts of an impact modifier, 1.0-3.0 parts of a lubricant, 3.0-8.0 parts of a filling agent and 0.2-1.0 part of a colorant. During preparation, all components are added in a specific order at different temperature intervals step by step, and the prepared compound is stable in performance, short in plasticizing time, low in balance torque and uniform in material dispersity, and volatile matter is more thoroughly volatized. The impact-resistant PVC pipe made from the compound and used for water supply has high physical and mechanical performance, mechanical performance is greatly improved, the performance of the pipe can be kept stable, the compound has the appearance density of 0.55-0.60 g / ml, and the pipe has the tensile strength of 47.3-48.3 MPa, impact strength of 77.8-81.8 KJ / m<3>, plasticizing time of 39.0-42.5 S and balance torque of 42.1-44.8 Nm. The preparation method of the compound is simple and easy to control and facilitates actual production, and the production can be kept stable and efficient.

Description

Technical field [0001] The invention belongs to the technical field of high molecular polymer materials, and specifically relates to a mixed ingredient capable of improving the quality and processability of PVC-M pipes and a preparation method thereof. Background technique [0002] In recent years, PVC-M pipes have been widely used in urban and rural water supply and building water supply due to their lighter materials and saving materials, and they can also be adapted to more demanding geographical environments. However, the product quality and performance of various PVC-M pipe manufacturers are uneven, and the quality and mechanical properties of each batch of products of each manufacturer also fluctuate greatly. Tracing the root cause is that each manufacturer has failed to fundamentally To solve the problem of mixing ingredients, the one-pot mixing process is adopted. It is believed that as long as the kneading temperature is controlled, the product molding is difficult, the ...

AI Technical Summary

Problems solved by technology

However, the product quality of various PVC-M pipe manufacturers is uneven, and the performance is also very different. The quality and mechanical properties of each batch of products of each manufacturer also fluctuate greatly. To solve the problem of mixing ingredients, adopt a one-pot mixing process. It is believed that as long as the kneading discharge temperature is controlled, the product is difficult to form, unstable in performance, and low in quality. This practice seriously affects and restricts the market for PVC-M pipes. value

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