PVC profiles are 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 for titanium dioxide. Of course, titanium dioxide also plays a role of pigment in the profile, and it is also necessary to provide a good appearance of color. The formula of rigid PVC profile is very complicated and difficult to process, requiring titanium dioxide does not affect the processing performance of other components, and meet the requirements of high temperature processing on the heat resistance of titanium dioxide and so on.
The requirement for titanium dioxide for profiled materials can be said to be the most basic requirement for weatherability. Therefore, a hard weathering rutile type titanium dioxide is used for the hard PVC profile. The molding process of plastic processing mainly includes injection molding, extrusion, calendering, blown film, hollow molding, etc. Among them, rigid PVC profile extrusion molding. All kinds of molding processes must heat and shear the raw and auxiliary materials during processing, and the components are uniformly mixed. Therefore, the common requirement is that the titanium dioxide should meet the basic heat resistance requirements and should be easily dispersed without affecting other components. The processing performance, etc., are different mainly because of the different effects on the later application performance of the product.
Titanium dioxide plays a very important role in the development of rigid PVC profile market. Hard PVC doors and windows have outstanding comprehensive performance, but PVC itself is not weatherproof, it is titanium dioxide to give PVC a good weather resistance, so that it can be used as outdoor products. If titanium dioxide can provide more efficient weather-resistant discoloration properties for profiled materials and reduce costs appropriately, then the market share of PVC profiles in the window and door market will increase even more significantly. At present, rigid PVC profile is one of the main users of high-end rutile titanium dioxide in the plastics industry. The industry has achieved an average annual growth rate of nearly double-digit in the past two decades, not only demanding domestically produced high-end rutile titanium dioxide. It also provides tremendous space for development and opportunities.
