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What are the various methods of dyeing of plastics

2021.08.10dyeing of plastics

  Speaking dyeing of plastics, it is a very common link in the processing of plastic products. For different plastic products, after dyeing, products with the same type but different needs can be distinguished, and ordinary dyeing of plastics can be transformed into colorful products. So generally speaking, what are the methods dyeing of plastics?

  There are three main dyeing methods for thermoplastics:

  1. Dry staining. Put a certain proportion of dye and plastic pellets into the rotating drum, and add 0.01% ~ 0.1% zinc stearate or white mineral oil as wetting agent to make the plastic easy to bond with the dye. Rotate the drum to completely mix the plastic and dye evenly.

  2. Extrusion dyeing. The method is to mix the dye and plastic according to the dry dyeing method, then squeeze them into a thin strip with a special extruder and cut them into granules. The method has good color mixing and is helpful to disperse poor pigments.

  3. Dry dense staining. This method is basically the same as the extrusion dyeing method. The difference is that the proportion dyeing of plastics is more than 10 times higher than usual. Multiple primary color plastics can be added to dilute during injection molding.

key words:dyeing of plastics Chinese dyeing of plastics

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