When making engineering plastics, use toner or masterbatch, what are their advantages and disadvanta
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- Unsolveddestoon
- 2021-08-09 11:45
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- 1Flooranonymity
- 2021-08-14 17:22
1. Toner coloring
The method of coloring plastic particles directly with toner (pigment or dye) and adding an appropriate amount of powdery additives, also known as dry coloring.
advantage:
1. Good dispersion.
2. Suitable for small batch plastic processing.
3. The cost is low, which saves the manpower and material resources in the process of color masterbatch and color paste.
shortcoming:
1. Fly dust pollution, the pigments will fly during transportation, storage, weighing, and mixing, causing pollution and seriously affecting the working environment.
2. The hopper of the extruder is not easy to clean. The toner used for coloring is attached to the inner wall of the barrel (or even on the screw) under the action of a wetting agent such as white oil. When the material needs to be changed, cleaning the barrel becomes a problem for the on-site operators.
3. Blown film and spinning products are not practical. Toner is used for coloring. Because the pigment powder is evenly distributed in the resin to be colored, its dispersibility is better. This conclusion can only be applied to injection molded products, especially thick-walled products. In other words, it is a different story for blown film and spinning products. Because the toner generally has not been pre-treated, when it is mixed with the resin, only the distance from the feed port, screw, and discharge port of the extruder and such a short plasticizing and mixing time are required to make the pigment powder The molecules of the pigment and the pigment molecules to be colored work well together-the full combination is completely impossible to guarantee, and there will be a phenomenon of "sandwiching". But this kind of "pinning" phenomenon will be concealed in thick-walled products, and it is obvious in blown film and spinning products. Therefore, the latter's coloring method is still based on masterbatch.
The method of coloring plastic particles directly with toner (pigment or dye) and adding an appropriate amount of powdery additives, also known as dry coloring.
advantage:
1. Good dispersion.
2. Suitable for small batch plastic processing.
3. The cost is low, which saves the manpower and material resources in the process of color masterbatch and color paste.
shortcoming:
1. Fly dust pollution, the pigments will fly during transportation, storage, weighing, and mixing, causing pollution and seriously affecting the working environment.
2. The hopper of the extruder is not easy to clean. The toner used for coloring is attached to the inner wall of the barrel (or even on the screw) under the action of a wetting agent such as white oil. When the material needs to be changed, cleaning the barrel becomes a problem for the on-site operators.
3. Blown film and spinning products are not practical. Toner is used for coloring. Because the pigment powder is evenly distributed in the resin to be colored, its dispersibility is better. This conclusion can only be applied to injection molded products, especially thick-walled products. In other words, it is a different story for blown film and spinning products. Because the toner generally has not been pre-treated, when it is mixed with the resin, only the distance from the feed port, screw, and discharge port of the extruder and such a short plasticizing and mixing time are required to make the pigment powder The molecules of the pigment and the pigment molecules to be colored work well together-the full combination is completely impossible to guarantee, and there will be a phenomenon of "sandwiching". But this kind of "pinning" phenomenon will be concealed in thick-walled products, and it is obvious in blown film and spinning products. Therefore, the latter's coloring method is still based on masterbatch.