Black Masterbatch For Injection

High dispersion
Black masterbatch is produced using carbon black. Raw carbon black is a very difficult and dirty mixture, it is dusty, light and fluffy. Unless large-scale treatment measures are taken, it will dirty machines and workers and make the working environment dirty. Because of this, casters generally choose to pre-disperse carbon black on a resin carrier, that is, black masterbatch. This resin carrier is clean, free-flowing and easy to use. In addition, in addition to being dirty, carbon black has another characteristic that is difficult to disperse.

Strong covering power
The second factor that determines the quality of black masterbatch is covering power, which is particularly important for masterbatches used for waste or recycled polymers. In these cases, the role of black is to cover other colors in the waste. Large particle carbon black has poor coloring ability and is not easy to cover all other underlying colors, resulting in the final product only getting a deviated color. During the melting process, the ability to correctly select carbon black with high coloring power to cover the existing color is called covering power.

Good flowability
The third factor that determines the quality of black masterbatch is rheology and flowability. If a masterbatch itself has good dispersion, but it cannot flow into the material to be molded, the production effect will not be ideal. Generally speaking, the primer resin used to produce masterbatch has a high rheology. In order to save costs, some masterbatch manufacturers use reused materials, waste materials or recycled materials as resin carriers. The flow performance of the masterbatch produced in this way will be significantly reduced. If the rheology is not good, the molder will have trouble with cycle time and appearance processing. It is worth noting that if the dispersion and rheology are not high, some end users will compensate by increasing the dilution ratio, but this practice will only increase the cost of using the masterbatch. Masterbatches with the minimum dilution ratio can produce uniform, well-dispersed black.

Choosing the best does not necessarily mean the more expensive the better. For example, some masterbatches are very black on ABS, but not necessarily on PP.

The most important performance of black masterbatches is dispersibility. It is better to choose a masterbatch with good dispersion and add more than the so-called masterbatch with high blackness but poor dispersion.

Compatibility with raw materials. Masterbatches with different base materials are used in incompatible plastics, which will cause the products to delaminate and peel.

Add the right amount. If the amount is too small, the dyeing will be uneven. If the amount is too large, it will affect the physical properties and may also increase the cost. The designed color of the product can be achieved according to the proportion during processing.

Mix evenly with the raw materials. It is best to choose a masterbatch with the same particle size as the raw material, otherwise some parts will arrive and some parts will remain in the original color.

The processing temperature should not be too high or too low, otherwise it may lead to poor plasticization effect of the masterbatch. Affect the surface smoothness of the product and the shrinkage ratio of the product.

Choose a qualified, honest, quality-conscious and control-capable supplier with development strength.