How to solve the black plastic masterbatch with striped pigment bands.In the sunlight, there are striped bands of pigment.
This problem needs to be considered from the physical and black plastic masterbatch mechanical properties of plastics and plastic molding process:
1. The temperature of injection molding equipment is not well controlled, and the color masterbatch cannot be fully mixed with resin after entering the mixing chamber.
2. Injection molding machine does not add a certain back pressure, screw mixing effect is not good.Increase the storage quantity of machine barrel.
3. Poor dispersion of color masterbatch or poor plasticization of resin.
The black plastic masterbatch process can be adjusted as follows:
1. Slightly increase the temperature of mixing chamber by the blanking port.
2. Apply some back pressure to the injection molding machine.If the above debugging is still not good, it may be color masterbatch, resin dispersion or matching problems, and color masterbatch manufacturing department contact to solve.