Masterbatch Production And Titanium Dioxide

Masterbatch Plastic masterbatch is a highly concentrated, high-efficiency color preparation, that is, the pigment is evenly distributed in the carrier resin at an extraordinary concentration and forms particles of a certain particle size. It is mainly composed of a core layer (pigment), a coupling layer (coupling agent or surfactant), a dispersion layer (lubricant or dispersant) and a blending layer (carrier resin). It is widely used as a dye in plastics. It is used in the production of plastic products such as film blowing, injection molding, hot pressing, injection molding, etc. The masterbatch has excellent coloring effect, is easy to use, saves energy, and is free of dust and sewage when used, so it is favored by users.

The development speed of masterbatch is very fast. In addition, the production process of masterbatch is simple and the investment is low. Currently, there are hundreds of masterbatch factories in China, with varying production scale and technical level. The annual output of small ones is tens of tons, and the large ones are high. million tons, product competition is becoming increasingly fierce, the profits of manufacturing companies are on a downward trend, and the quality of most masterbatch products is low. According to incomplete statistics, 20,000 to 30,000 tons of titanium dioxide are used for masterbatch production every year. The rutile used is divided into three grades: high, medium and low. The high-grade uses imported rutile, the mid-grade uses domestic rutile, and the low-grade uses domestic anatase. type titanium white. Due to fierce competition, the use of anatase titanium dioxide masterbatch has an increasing trend.

Masterbatch can be used to color PVC, polyethylene, polypropylene, polystyrene and ABS plastics. Its main ingredients include pigments, resins, dispersants, intrinsic pigments, fluorescent whitening agents, antioxidants, anti-UV agents, antistatic agents, toughening agents, brighteners, etc. Titanium dioxide is used as a white pigment and has non-toxic properties. It has the advantages of toxicity, stable chemical properties, high covering power and good dispersion.

There are several masterbatch production processes, typical ones are:

High-speed mixer for pigments, resins, dispersants, volume pigments, and other additives

Twin screw machine extrusion masterbatch

Masterbatch is used as an industrial raw material, and its performance is usually reflected in subsequent product applications (such as film blowing or injection molding). Therefore, the performance of titanium dioxide in masterbatch is also mainly reflected in the application process of the masterbatch. . Mainly reflected in the following aspects:

1) The coloring ability of titanium dioxide: determines the amount of titanium dioxide used in the color of the same plastic product,

2) The whiteness of titanium dioxide: determines the appearance of light-colored (white) plastic products with the same titanium dioxide content:

3) The dispersion of titanium dioxide: affects the production cost of masterbatch and the appearance, gloss and other indicators of plastic products

4) The processing performance of titanium dioxide: affects the production cost of masterbatch.