What causes the unstable color of plastic products?

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Nowadays, the application of plastic products has been widely used. In life, we are very common, such as: electrical housing, and our usual washbasins are plastic, but when plastic products are processed, the color Instability is a common problem.

1. First of all, the temperature of the injection molding machine should be checked. The color is unstable, which is related to the temperature of the injection molding machine. Therefore, it must be checked first when processing plastic products.

2. Sometimes the back pressure is too large, the production cycle is unstable, the production cycle is unstable, and the color is changed when it is opened and stopped.

3. The mixer does not mix the toner and raw materials in accordance with the mixing process, such as insufficient time, inconsistent feeding methods, or inconsistent order of feeding, resulting in uneven color separation. This is also one of the reasons for the unstable color. Therefore, during processing, It is also important to check when the case is injection molded.

4. Because the humidity of the raw material is too high, the viscosity inside has not spread, which will cause the color of plastic products to be unstable.

5. The re-use amount of sprue material is more and less, which has a greater impact on light-colored plastic products.

6. The brands of raw materials are inconsistent. Because the background color of each raw material is different, the color of the same toner plastic products will be different. Sometimes the same supplier with different batch numbers of raw materials will have some deviation in the background color. Therefore, for products with high color deviation requirements, even the background color of each batch of incoming materials must be controlled to be consistent.

7, the toner quality is too poor, not heat-resistant, or using the wrong toner is not suitable for the raw material, will make the color unstable.