White masterbatches are additives used in the plastics industry to impart a white colour to plastic products. They are typically in the form of a concentrated mixture of titanium dioxide (TiO2) or other white pigments dispersed in a carrier resin. The carrier resin can be compatible with the base plastic material in which the masterbatch is intended to be incorporated.
White masterbatches are commonly used in various plastic applications where a white colour is desired, such as in films, sheets, fibres, moulded parts, and extruded profiles. By using masterbatches, manufacturers can avoid the need to directly incorporate large amounts of white pigments into their plastic formulations, which can be costly and difficult to achieve uniformly.
The masterbatch is usually added to the base polymer during the manufacturing process. It is blended with the base resin to achieve the desired colour and opacity. The concentration of the masterbatch added depends on the desired shade of white and the opacity required. Different grades of white masterbatches are available to meet specific application requirements.
In addition to providing a white colour, white masterbatches can also offer other properties such as UV stability, heat resistance, or specific functional characteristics. These additives can help improve the performance and appearance of plastic products, making them more suitable for their intended applications.
It’s worth noting that while white masterbatches are commonly used, there are also other methods to achieve white colour in plastics, such as using pre-coloured resins or compounding white pigments directly into the base polymer. The choice of method depends on factors like cost, manufacturing process, and specific product requirements.