The common problems and solutions in the production of color masterbatch

Color masterbatch is an aggregate prepared by uniformly loading a super-constant amount of pigment into the resin. As a new type of special colorant for polymer materials, color masterbatch have widely applications in many industries. But there are also some common problems during the production of colour master batch. This article will introduce the common problems and the solutions in the production of color masterbatch.

The influence of injection molding machine and mold factors

To choose an injection molding machine with the same capacity as the main product of injection molding, if the injection molding machine has problems such as material and angle, it is better to replace the equipment. For the cause of chromatic aberration such as casting system, exhaust groove, etc., it can be solved by maintaining the corresponding parts of the mold. Injection molding machine and mold problems must be addressed before production can be organized to reduce the complexity of the problem.

The influence of raw resin and masterbatch

Controlling raw materials is the key to completely solving chromatic aberration. Therefore, especially in the production of light-colored products, the significant influence of the thermal stability difference of the raw resin on the color fluctuation of the product cannot be ignored. Since most injection molding manufacturers do not produce plastic color masterbatch or color masterbatches themselves, the focus should be on production management and raw material inspection. That is to strengthen the inspection of incoming raw materials. The same product in production should be produced by the same color masterbatch manufacturer, the same brand of color masterbatch, a sampling test must be carried out before mass production, which is the same as the last proofreading. In this comparison, if the color masterbactch of difference is not large, it can be considered qualified. At the same time, we also need to pay attention to the thermal stability of raw material resin and color plastic masterbatch. For poor thermal stability, we recommend replacement by the manufacturer.

The influence of uneven mixing

Poor mixing of plastic masterbatch and masterbatch will also change the color of the product. After mechanically mixing the color masterbatch, when the hopper is fed into the hopper through the lower suction port, the color masterbatch is separated from the color masterbatch due to the action of static electricity, and is easily adsorbed on the hopper wall. During the injection molding cycle, there must be changes in the amount of masterbatch, resulting in chromatic aberration. In this case, the raw material can be sucked into the hopper and stirred by hand. Now, many companies use the feeder to add color masterbatch, which saves a lot of manpower and helps a lot in color difference control. However, due to improper use, many companies are often unsatisfactory. The weight of the feeder added to the masterbatch at a fixed rate depends on the plasticizing time, and the plasticizing time itself fluctuates and sometimes fluctuates, so in order to ensure a constant feed rate, the feeder must be fixed. Feed time. And the setting time is less than the minimum plasticizing time. When using the feeder, it should be noted that due to the small outlet of the feeder, after a period of use, the raw material powder accumulated in the feeder screw may be inaccurate, or even the feeder may stop running. Regular cleaning is required.

Ningbo Colour Master Batch is a professional color masterbatch supplier that  founded in 1985, which is one of the earliest engaged in research, production and main drafting unit of the national industry standards of color master batch. If you want to find the high quality color masterbatch, you can consider to consult NIngbo Colour Master Batch, offering the custom color masterbatch, white color masterbatch, black color masterbatch, color functional masterbatch and so on.