How to solve the problem of color difference in the color matching of TPE raw materials?
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- Unsolveddestoon
- 2021-08-16 14:56
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- 1Flooranonymity
- 2021-08-17 15:19
1. Large temperature changes of TPE raw materials cause color difference
Inorganic toners are prone to heavy metals exceeding the standard, while organic toners do not contain heavy metals, but the large temperature difference (greater than 10°C) can easily cause the toner to degrade and discolor.
Solution: Try to control the stability of the molding temperature.
2. TPE raw materials from different manufacturers or batches
TPE raw materials from different manufacturers may have different color matching properties due to different formulations; or raw materials from the same manufacturer and different batches may have different color matching properties due to unstable process or quality control. Adding toner or masterbatch in the same proportion may cause color difference.
Solution: Try to use raw materials from one supplier and ask the supplier to control the quality of the product.
3. Degradation and discoloration of TPE raw materials will cause color difference.
The residence time of the material in the screw is longer. After shutdown, the next injection can be performed without a washing machine.
Solution: Clean the screw before each shutdown.
4. Poor dispersion of TPE pigments
When the toner and the host material are not uniformly mixed, the toner may agglomerate when dispersed in the screw, or the mixing system itself is not conducive to the dispersion of the toner, causing chromatic aberration.
Solution: Stir evenly during operation, choose surface-active toner to reduce agglomeration, and then add diffusion additives to facilitate the dispersion of the toner.
5. Inaccurate weighing of TPE raw material masterbatch
For some products, the color difference of the masterbatch is 1:2 at a given ratio, which may cause the color difference of the product.
For some products, the color difference of the masterbatch is 1:2 at a given ratio, which may cause the color difference of the product.
Solution: Strictly weigh the amount of masterbatch. Try to mix the masterbatch with the main ingredient before cutting.
Inorganic toners are prone to heavy metals exceeding the standard, while organic toners do not contain heavy metals, but the large temperature difference (greater than 10°C) can easily cause the toner to degrade and discolor.
Solution: Try to control the stability of the molding temperature.
2. TPE raw materials from different manufacturers or batches
TPE raw materials from different manufacturers may have different color matching properties due to different formulations; or raw materials from the same manufacturer and different batches may have different color matching properties due to unstable process or quality control. Adding toner or masterbatch in the same proportion may cause color difference.
Solution: Try to use raw materials from one supplier and ask the supplier to control the quality of the product.
3. Degradation and discoloration of TPE raw materials will cause color difference.
The residence time of the material in the screw is longer. After shutdown, the next injection can be performed without a washing machine.
Solution: Clean the screw before each shutdown.
4. Poor dispersion of TPE pigments
When the toner and the host material are not uniformly mixed, the toner may agglomerate when dispersed in the screw, or the mixing system itself is not conducive to the dispersion of the toner, causing chromatic aberration.
Solution: Stir evenly during operation, choose surface-active toner to reduce agglomeration, and then add diffusion additives to facilitate the dispersion of the toner.
5. Inaccurate weighing of TPE raw material masterbatch
For some products, the color difference of the masterbatch is 1:2 at a given ratio, which may cause the color difference of the product.
For some products, the color difference of the masterbatch is 1:2 at a given ratio, which may cause the color difference of the product.
Solution: Strictly weigh the amount of masterbatch. Try to mix the masterbatch with the main ingredient before cutting.