The plastics industry is the second largest user of titanium dioxide.

China Coatings Network
News: With the expansion of the scope of applications in the plastic products industry, many external plastic products, such as plastic doors and windows, building materials and other outdoor plastic products, weather resistance is also very high requirements, in addition to the use of redstone
titanium dioxide
in addition to the need for surface treatment.
surface treatment is generally not zinc, only silicon, aluminum, vanadium and so on. Silicon has a hydro-humidification effect, to prevent plastic high temperature extrusion due to evaporation of water and the production of pores, but the amount of these surface treatment agents is generally not too much.
Because plastic products are much thicker than
paints
and ink coatings, it does not need to be too high pigment volume concentration, coupled with its high covering force, strong coloring force, the general dosing is only 3% to 5%. It is used in almost all thermostate and thermoplastic plastics, such as polyolefins (mainly low-density polyethylene), polystyrene, abs, PVC, etc., which can be mixed with resin dry powder, can also be mixed with liquid containing plasticizers, and some of the titanium dioxide is processed into mastermission before use.
The composition of plastics include resins, fillers, plasticizers and other additives (e.g. colorants, anti-agents, flame retardants, etc.), according to the product processing method can be divided into plastic film extrusion blow molding process, plastic sheet extrusion molding process and plastic injection molding process.
Most plastics with titanium white powder particle size is relatively fine, usually
coating
with titanium white powder particle size of 0.2 to 0.4 m, and plastic with titanium white powder particle size of 0.15 to 0.3 m, so that you can obtain the blue background phase, most of the resin with yellow phase or easily yellow resin has a masking effect.
plastics industry is the second largest user of titanium dioxide, is the fastest growing field in recent years, the average annual growth rate of 6%, the world's more than 500 titanium dioxide brand, there are more than 50 brands are dedicated to plastic. The application of titanium dioxide in plastic products, in addition to the use of its high cover, high coloration and other pigment properties, it can also improve the resistance of plastic products heat, light, weather resistance, so that plastic products from UV light attack, improve the mechanical and electrical properties of plastic products.