In the process of using Masterbatch, color difference may occur due to various factors. The following are some common reasons.
First of all, the quality and stability of Masterbatch itself is one of the key factors. If the pigment is not evenly dispersed during the production process of Masterbatch, or the pigment is of poor quality and purity, it may cause color difference when used. For example, inconsistent pigment particle size may be unevenly distributed in plastic products, resulting in inconsistent color performance.
Changes in processing conditions can also cause color difference. Fluctuations in processing parameters such as processing temperature, pressure, and time may affect the dispersion and fusion of Masterbatch. Too high temperature may cause pigment decomposition or discoloration, while too low temperature may prevent Masterbatch from being fully dispersed, resulting in color difference.
Differences in plastic raw materials should not be ignored. Plastic raw materials from different batches and manufacturers may have subtle differences in performance and composition, which will affect the compatibility and dispersibility of Masterbatch in them. For example, the different crystallinity of some plastics may cause deviations in the color development effect of Masterbatch.
Inaccurate addition ratios of Masterbatch are a common problem. If too much or too little is added, the expected color effect cannot be achieved. This may be caused by reasons such as metering equipment failure and operator error.
The cleanliness of the equipment will also affect the color difference. If there are materials or impurities of other colors left in the production equipment, mixed contamination is likely to occur when using the new Masterbatch, resulting in color difference.
In addition, environmental factors may also play a role. For example, a humid environment may affect the performance of the pigment, or during storage, the Masterbatch may be affected by factors such as light and oxidation, causing its color to change.
In actual production, process adjustments and improvements may also cause color differences. For example, changing the mold, adjusting the injection speed or screw speed, etc. may change the distribution and integration of Masterbatch in plastic products.
Take a plastic product factory as an example. Due to the replacement of the plastic raw material supplier, the new raw material has poor compatibility with the original Masterbatch, resulting in obvious color difference in the products produced. The formula and addition ratio of Masterbatch have to be readjusted to solve the problem.
In summary, the color difference of Masterbatch during use is the result of the combined action of multiple factors. In order to reduce the occurrence of color difference problems, it is necessary to strictly control the quality of Masterbatch, optimize the processing technology, accurately measure the addition ratio, keep the equipment clean, and pay attention to the impact of environmental and process changes.
