A kind of non-phthalic PVC pellets and preparation method thereof

Abstract

A phthalate-free PVC granule and manufacturing method thereof. The PVC granule comprises a PVC powder, a modifier, and a regulator, wherein the mass fraction of the PVC powder in the PVC granule is 49-51%, more preferably 50%; the mass fraction of the modifier in the PVC granule is 19-21%, more preferably 20%; and the remainder comprises the regulator. The modifier selected for the invention is a matting resin. The modifier does not include calcium carbonate, does not increase the specific weight of a product, has a simple formula, is applicable for a matching phthalate-free PVC granule, and can guarantee performance indicators such as hardness and tensile strength. The modifier can enhance a matting effect and a delustering effect, and does not influence a product characteristic. A formula of the phthalate-free PVC granule and the manufacturing method thereof are both capable of ensuring that a product has high quality, excellent performance, and can be used in a wide range of applications.

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.

Images