Color difference in the production process of color masterbatch can be said to be a relatively common problem, and its color difference will not only affect product quality, but also affect the later use effect. Now many manufacturers have mastered some methods to strictly control their color quality in the production process, so as to avoid color difference. So the following Xiaobian will talk about those methods, so that everyone can understand this in many aspects.
1. The way to solve the unstable quality of the color masterbatch is to strictly check the factory. The grade of the ink method scraping paper sheet inspected by the pigment factory can be used as the acceptance standard, and the approximate grade, the very similar grade, the slight similar grade, and the more similar grade return.
2. The degree of dispersion of the color masterbatch in the hot period plastic medium is related to the wetting effect of the pigment on the plastic and the shear force during dispersion, if the pigment is not well dispersed, it will cause the coloring strength to deteriorate. For this purpose, the operating steps should be checked to stabilize the kneading or mixing process.
4. There are deviations in calculation, weighing and blending of raw and auxiliary materials, so the measuring instrument should be checked regularly to correctly master the formula calculation and weighing technology.
5. The color difference of many color masterbatches is caused by the yellowing and darkening of the carrier, rather than the pigment problem, which is especially obvious for light color and low pigment content. Therefore, choose a good carrier resin and try to keep the carrier discolored without changing the processing and use conditions (stabilizers can be added to the resin, etc.).
6. The degree of influence of various additives on the color of the final product should be confirmed in advance.
In fact, in summary, in order to master the quality of the color masterbatch and avoid the phenomenon of color production, it is necessary to strictly control each operation step in the production process, so as to avoid too many or too few auxiliary materials affecting its color quality.
