There are also common problems in the use process, and there are also problems in the production process, so today we will learn about the common problems of color masterbatch?

1、 Under the sunlight, there are stripes in the products. This problem should be considered from two aspects: the physical and mechanical properties of the plastic and the plastic forming process

1. The temperature of the injection molding equipment is not well controlled, and the color masterbatch cannot be fully mixed with the resin after entering the mixing chamber.

2. The mixing effect of screw is not good without certain back pressure.

3. The dispersion of color masterbatch is not good or the resin plasticization is not good.

The color masterbatch process can be debugged as follows:

1. Slightly increase the temperature of the mixing chamber against the blanking port

2. Apply a certain back pressure to the injection molding machine.

If the above debugging is not good, it may be the dispersibility or matching problem of color masterbatch and resin, which should be solved by contacting the manufacturer of color masterbatch.









2、 When a certain color masterbatch is used, the product is easy to crack



This may be due to the poor diffusion and mutual solubility caused by the poor quality of dispersant or auxiliary selected by the manufacturer, which affects the physical and mechanical properties of the products.



3、 The color is too dark (too light) after use according to the proportion in the color master manual



Although the problem is simple, there are many possibilities, specifically:



1. Too few or too many pigments without careful color test



2. The measurement is not accurate when it is used, and a large number of domestic enterprises, especially small and medium-sized enterprises, measure at will



3. There is a problem in the matching of color masterbatch and resin, which may be due to improper carrier selection of Color Masterbatch, or the manufacturer may change the resin variety at will



4. Improper temperature of the machine, too long stay of color masterbatch in the machine



Processing procedures: first, check whether the resin type matches the color masterbatch and whether the measurement is accurate, then adjust the temperature or rotation speed of the machine, if there are still problems, contact the color masterbatch manufacturer.



4、 With the same color masterbatch, resin and formula, why are the products injected by different injection molding machines dark and light?



This is often caused by the injection molding machine. Different injection molding machines have different mechanical states due to different manufacturing, service time or maintenance conditions, especially the difference in the tightness between the heating elements and the barrel, which makes the dispersion state of the color masterbatch in the barrel different, and the above phenomenon will appear.



5、 After changing the resin of another brand, the color of the same color masterbatch and formula has changed. Why?



The density and melt index of different brands of resin will be different, so the performance of resin will be different, and the compatibility with color masterbatch will also be different, resulting in color change. Generally speaking, as long as the difference between density and melt index is not big, the color difference will not be too big. You can adjust the amount of color masterbatch to correct the color.