Different color masterbatch, the performance is also different when choosing pigments, the following are introduced separately, how to choose pigments for color masterbatch:
The pigments used for heat-resistant color masterbatch are basically required to withstand the temperature in the production process of polypropylene fiber and maintain its stable performance. The temperature resistance temperature is generally required to be above 270 ~ 280 ℃.
The pigment for dispersible masterbatch should be excellent in dispersibility and should be uniformly dispersed in the masterbatch, and the dispersant used will not reduce the quality of the polypropylene fiber. Otherwise, it is impossible to produce good-quality stock colored fibers, and the operation is unstable, and it is easy to break or produce abnormal fibers when drawing the fibers.
Bright polypropylene stock solution coloring has a variety of uses, among which are used for bed cover base fabrics and knitted fabrics, which require bright tones. Because organic pigments are bright and bright, and easy to color, organic pigments are required for those used in the above applications.
Light resistance Under the action of light, some pigments have a photosensitizing effect, which makes the colored fibers fade and embrittlement. The light resistance of the pigment is basically related to its chemical structure. When the pigment needs to be used, consider adding an ultraviolet absorber.
The pigment used in the stable color masterbatch should have excellent stability to the colored polypropylene fiber. This means that the colored fiber polymer will not react with the fiber when exposed to heat, light, or high temperatures for long periods of time, forming new chemical groups that will lower the polymer's performance.