How to reduce TPE elastomer products and the original color difference
Color difference in our daily life, meaning the color difference, that is, after the product comes out, the product and the original color difference, dark or light difference. Many users in the use of TPE color production, production products often reflect the color difference.
1 TPE raw materials produced by different manufacturers or batches may vary due to different formulations; Or the same manufacturer, different batches of raw materials, due to the process or quality control instability, may lead to different color matching performance, adding the same proportion of toner or color master, there may be color difference.
Solution: try to use raw materials from one supplier and ask the supplier to control the quality of the product.
2 The dispersibility of toner is bad be caused by, toner and main material agitate unevenness, toner is in screw when dispersive may produce agglomeration, or match mix system (if did not add diffuser) itself is not conducive to dispersive toner, produce chromatic aberration thereby.
Solution: stir evenly during operation; Choose the color powder with surface activity to reduce agglomeration; Add diffuser to help disperse toner.
3 Color master weighing is not accurate, some products, the established ratio, color master one or two, may lead to the product of greater color.
Solution: strictly weigh the number of color master. Try to mix the color masterbatch and main material well before blanking.
4 Large temperature variation leads to color difference. Heavy metals in inorganic toner tend to exceed the standard, while organic toner does not contain heavy metals. However, a large temperature difference (more than 10℃) easily leads to degradation and discoloration of toner.
Solution: try to control the stability of molding temperature.
5 Material degradation discoloration, resulting in color difference, material in the screw retention time is long, shut down, the next injection without washing machine production.
Solution: clean the screw before each stop.