Injection molding grade PVC composite material high in mobility and melt strength

Abstract

The invention relates to an injection molding grade PVC composite material high in mobility and melt strength and belongs to the technical field of macromolecules. The composite material comprises, by weight parts, 30-60 parts of low molecular weight PVC resin powder, 5-20 parts of crosslinking PVC resin powder, 10-30 parts of main plasticizer, 10-20 parts of secondary plasticizer, 0.5-20 parts of nano calcium carbonate, 0.5-2 parts of high melt strength processing agent, 0.4-1.5 parts of lubricant, 0.5-4 parts of heat stabilizer, 0.1-1 part of light stabilizer, 0.1-0.3 part of antioxidant and 1-3 parts of other auxiliaries. Melt strength and mechanical properties of the PVC composite material are improved while high mobility is guaranteed. The injection molding grade PVC composite material can adapt to injection molding products of various sizes and shapes and can meet requirements of low plastic temperature and short plastic cycle.

Description

technical field [0001] The invention relates to an injection molding grade PVC composite material with high fluidity and high melt strength, which belongs to the technical field of macromolecules. Background technique [0002] PVC is the English abbreviation of polyvinyl chloride. PVC modified materials are cheap, rich in raw materials, and easy to process. They are widely used in industries such as automobiles, construction, home appliances, and cables. They are currently one of the most produced plastics in the world. Injection molding technology is the most commonly used means of plastic processing and molding. With the continuous development of injection molding technology, injection molding technology is constantly pursuing lower injection molding temperature and shorter injection molding cycle to reduce energy consumption and increase production capacity. Therefore, the requirements for injection molding materials are also constantly increasing to meet low temperature ...

AI Technical Summary

Problems solved by technology

With the complexity of auto parts and other injection molding products, the size and shape of the products are varied, especially some extra-small or extra-large products (such as ultra-small triangular windows and super-large triangular windows) and the design of product variable cross-section, Coupled with the pursuit of low injection molding temperature and short molding cycle, it brings many challenges to PVC injection molding materials

Simply by improving fluidity or adjusting mold design, it is difficult to solve the appearance defects of injection molding and ensure production stability

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