How to solve the white problem of the products produced by the masterbatch machine for injection mol

Cool down, or add more masterbatches.

Common problems of masterbatch machine.

1. After using a certain masterbatch, the product appears to be more prone to rupture This may be due to the poor diffusion miscibility caused by the poor quality of the dispersant or additive selected by the manufacturer, which affects the physical and mechanical properties of the product.

2. After using according to the proportion on the masterbatch manual, the color is too dark (too light) Although this problem is simple, there are many possibilities, specifically:

The masterbatch has not been carefully tested, and there is too little or too much pigment.

The measurement is not accurate when it is used, and there are a large number of domestic enterprises, especially small and medium-sized enterprises.

There is a problem with the matching of masterbatch and resin, which may be due to the improper selection of the carrier of the masterbatch, or it may be that the manufacturer changes the resin variety at will.

The temperature of the machine is improper, and the masterbatch stays in the masterbatch machine for too long.

3. The same masterbatch, resin and formula, why the color of the products injected by different masterbatch machines is often caused by the injection molding machine. Different injection molding machines have different mechanical conditions due to different manufacturing, use time or maintenance conditions, especially the degree of closeness between the heating element and the barrel.

4. Whether the pigment migration phenomenon of masterbatch during the storage process of masterbatch machine will affect the quality of the product Some masterbatches have a high pigment content (or dye), in this case, it is normal for migration to occur. In particular, masterbatches with added dyes will have serious migration.

5. After changing to another brand of resin, the same masterbatch and formula, but the color has changed, why is this? Different grades of resin will have different densities and melt indexes, so the properties of the resin will be different, and the compatibility with the masterbatch will also be different, resulting in color changes.

Summary. The cycle time is shortened, the cooling is shortened according to each product, and the flow rate of unlocking and clamping is accelerated!

The cycle time is shortened, the cooling is shortened according to each product, and the flow rate of unlocking and clamping is accelerated!

If you are sure that the rubber masterbatch will not melt during the injection molding process, it can only mean one thing: you are using the wrong material. The main components of the masterbatch:

Binders, pigment powders LDPE is usually used as a base material, because LDPE is cheap, soft, and has a low processing temperature. If it is a special high-temperature masterbatch, it may be PA as the base material. In addition to the temperature of the binder, there is also a problem of compatibility, although LDPE and most plastics are compatible well, but there are still incompatible.

It is estimated that when you use ordinary materials (PP, PE), you use high-temperature masterbatches, and the normal production and processing temperature is 200, but the high-temperature masterbatch can be more uniformly plasticized until about 250, of course, there is a problem.