Non-phthalic PVC aggregate and preparation method thereof

Abstract

The invention provides a non-phthalic PVC aggregate and a preparation method thereof. The non-phthalic PVC aggregate comprises, by mass, 49-51% of PVC powder and is characterized by further comprising, by mass, 19-21% of a modifier and the balance of a regulator. The non-phthalic PVC aggregate comprises, by mass, 49-51%, preferably 50% of the PVC powder and 19-21%, preferably 20% of the modifier, matting resin is selected as the modifier, and calcium carbonate does not need to be added, so that specific gravity of the non-phthalic PVC aggregate is not increased; performance indexes like hardness and tensile strength can be guaranteed when the non-phthalic PVC aggregate is properly proportioned. Matting effect can be improved, and characteristics of the non-phthalic PVC aggregate are unaffected. Both a formulation and the preparation method of the non-phthalic PVC aggregate can ensure high quality and good performance, and the non-phthalic PVC aggregate has wide application range.

Description

technical field [0001] The invention relates to the field of PVC materials, in particular to a non-phthalic PVC pellet. Background technique [0002] At present, the world's o-phthalic PVC types account for about 80%, while non-o-phthalic plasticizers only account for 20%. PVC is ubiquitous in people's production and life. China has become the world's largest producer, consumer and importer of PVC. Moreover, China's PVC market has been dominated by o-phthalic plasticizers for many years. According to statistics, PVC is currently the most used medical plastic. In order to increase the elasticity of PVC, commonly used PVC products contain the most economical and widely used plasticizers - dioctyl phthalate (DOP) plasticizer or diisononyl phthalate Esters (DINP). [0003] In recent years, there have been many negative reports about ortho-phthalic PVC, causing consumers to lose confidence in such products, and some researchers have also begun to question ortho-phthalic PVC. ...

AI Technical Summary

Problems solved by technology

The PVC pellets of this technical scheme are suitable for the medical industry, but it is very impractical for general civilian use or other industries. The details are difficult to control, the product quality is unreliable, and there is no matting effect and matte effect required by the industry

[0008] In addition, it has been reported that PVC can be added with inorganic powder to obtain a matte effect, but this method will lead to an increase in the proportion of PVC pellets, which will affect the mechanical properties and chemical stability of PVC.

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