Titanium dioxide coating is widely used in plastic packaging, mainly by its excellent hiding power, ultraviolet resistance and durability. As an ideal white pigment, titanium dioxide can give plastic packaging good hiding power and bright white effect, making the packaging appearance more attractive.

Selection of Titanium Dioxide Coating Type

Solvent-based titanium dioxide coating: It has good film-forming property and adhesion to plastic surface, and can form a uniform and compact coating on the surface of plastic packaging. It is suitable for plastic packaging with high requirements on water resistance and chemical resistance, such as some cosmetic plastic bottles and plastic packaging of industrial products. In the drying process, the solvent volatilizes to solidify the coating into a film, and the titanium dioxide is uniformly fixed on the plastic surface.

Waterborne titanium dioxide coating: Water is used as solvent, which has the advantages of environmental protection and low VOC (volatile organic compounds) emission. It is suitable for food, medicine and other plastic packaging with strict environmental protection requirements, such as food plastic packaging bags and drug plastic bottles. It forms a coating by evaporation of water and aggregation of polymer particles, and titania tio2 is evenly dispersed in the coating to provide the required functions.

Powdered titanium dioxide coating is a kind of solid powder coating, which is attached to the surface of plastic packaging by electrostatic spraying or fluidized bed dip coating, and then heated, melted and solidified to form a film. Powder coating has the advantages of high utilization rate, no solvent volatilization, thick coating, enhanced protective performance and decorative effect of plastic packaging, and is often used in large plastic containers, plastic trays and other packaging.

Technology of Titanium Dioxide Coating for Coating

Spraying: use a spray gun to evenly spray tinox tio2 paint on the surface of plastic packaging. The coating amount and coating thickness can be controlled by adjusting the parameters such as the pressure of the spray gun, the size of the nozzle and the spraying distance. This method is suitable for plastic packaging of various shapes and sizes, and can realize rapid and efficient coating, such as surface coating of plastic bottles and plastic buckets.

Flow coating: Plastic packaging products pass through the coating curtain, so that the coating is evenly sprayed on the plastic surface to form a coating. Flow coating process can obtain a uniform and flat coating, which is suitable for the coating of large-area and regular-shaped plastic packaging, such as plastic films and plastic sheets.

Roller coating: titanium dioxide coating is transferred to the surface of plastic packaging by coating roller. The thickness and uniformity of the coating can be controlled by adjusting the speed and pressure of the roller and the viscosity of the coating. Roller coating technology is often used for continuous coating of plastic films, with high production efficiency and stable coating quality.

Dip coating: the plastic packaging products are completely immersed in the titanium dioxide coating tank, so that the coating is evenly attached to the plastic surface, and then the excess coating is taken out and dried and solidified to form the coating. Dip coating is suitable for plastic packaging with complex shape and inner cavity, such as some special-shaped plastic containers, which can ensure that the coating covers every corner.