In the production process of plastic pellet machines, the problem of color difference often bothers us. The following is an analysis of the possible causes.
Formulation problems
- Color masterbatch without careful color testing and direct granulation with the plastic pellet machine may lead to color differences.
- Problems in the matching between masterbatch and resin may lead to color inconsistency of granules.
- Inaccurate measurement, over or under dosage of color masterbatch or pigment may cause color difference.
- Insufficient heat resistance of color powder may cause color variation under high temperatures.
plastic pellet machine process problems
- Baking process, too long or too high baking time and temperature may make the base color of the material baked yellow or discolored, causing color differences.
- The mixing process is not a clean material cylinder, the mixing time is not enough or too much, which
- may lead to uneven mixing, resulting in color differences.
- When changing the material for production, not cleaning the cylinder, or drying insufficiently, may lead to color difference problems.
Solution
- Carefully test the color and adjust the formula to ensure the formula is accurate.
- Check color masterbatch and resin to ensure a match.
- Make sure the measurement is accurate to avoid too much or too little color masterbatch and pigment.
- Check the heat resistance of the color powder and choose a suitable heat-resistant color powder.
- During the production process, pay attention to controlling the operation of baking, mixing, and adding materials to ensure a clean and even process.
