1.After using a certain color masterbatch, the product appears to be more likely to break.
This may be due to poor diffusion and miscibility caused by the poor quality of the dispersants or additives selected by the manufacturer, which affects the physical and mechanical properties of the product.
2. After using the masterbatch according to the proportion in the instructions, the color is too dark (too light). Although this problem is simple, there are many possibilities, specifically:
The color masterbatch has not been carefully tested, and the pigment is too little or too much.
Inaccurate measurement during use, and a large number of domestic enterprises, especially small and medium-sized enterprises, use arbitrary measurement.
There is a problem with the matching of color masterbatch and resin. This may be due to improper selection of the carrier of the color masterbatch, or it may be that the manufacturer changes the resin variety at will.
The machine temperature is improper and the masterbatch stays in the volumetric color doser for too long.
Processing procedures: First, check whether the resin type matches the masterbatch and whether the measurement is accurate. Secondly, adjust the machine temperature or speed. If there are still problems, please contact the masterbatch manufacturer.
3. With the same masterbatch, resin and formula, why do the products injected by different volumetric color doser have different colors?
This is often caused by the injection molding machine. Different injection molding machines have different mechanical conditions due to different manufacturing, usage time or maintenance conditions, especially the difference in the close contact between the heating element and the barrel, resulting in different dispersion states of the masterbatch in the barrel.
4. Will the pigment migration of the masterbatch during storage in the volumetric color doser affect the quality of the product?
Some color masterbatches have a high pigment (or dye) content, in which case migration is normal. Especially when dye is added to the masterbatch, serious migration will occur. But this does not affect the quality of the product, because after the masterbatch is injected into the product, the pigment is at a normal color concentration in the product. “
5. After changing to another brand of resin, the color of the same masterbatch and formula has changed. Why is this?
The density and melt index of different brands of resin will be different, so the performance of the resin will be different, and the compatibility with the masterbatch will also be different, resulting in color changes. Generally speaking, as long as the density and melt index are the same If it is large, the color difference will not be too big. The color can be corrected by adjusting the amount of color masterbatch. “
