Application of titanium dioxide in PVC profile

PVC profile is used as outdoor products, and weather resistance is one of the most important properties. Its weather resistance mainly depends on titanium dioxide, so high weather resistance is the most basic requirement of titanium dioxide. Of course, titanium dioxide also plays the role of pigment in the profile, and it is also necessary to provide good appearance and color. The formula of rigid PVC profile is very complex, and the processing is difficult and high. It is required that titanium dioxide will not affect the processing performance of other components, and meet the requirements of high-temperature processing on the heat resistance of titanium dioxide.

It can be said that the weather resistance is the most basic requirement for titanium dioxide. Therefore, the hard PVC profile uses rutile titanium dioxide with high weather resistance. The molding process of plastic processing mainly includes injection molding, extrusion, calendering, film blowing, hollow molding and so on, among which the hard PVC profile is extrusion molding. Various molding processes must heat and shear the raw and auxiliary materials during processing, and the components are evenly mixed. Therefore, the common requirements are that titanium dioxide should meet the basic heat resistance requirements, be easy to disperse, and do not affect the processing performance of other components. The difference is mainly the different impact on the later application performance of the products.

Titanium dioxide plays an important role in the development of rigid PVC profile market. Hard PVC doors and windows have outstanding comprehensive properties, but PVC itself is not weather resistant. It is titanium dioxide that gives PVC good weather resistance, so that it can be used as outdoor products. If titanium dioxide can provide more efficient weather and discoloration resistance for profiles and appropriately reduce the cost, the share of PVC profiles in the door and window market will be significantly improved. In the past 20 years, the domestic rutile and rutile plastics industry has not only provided a huge opportunity for the average annual growth rate of high-end users, but also provided a double-digit growth rate for the domestic rutile and rutile plastics industry.