The Dispersion Of Black Masterbatches 

The dispersion should be high: Black masterbatches are produced using carbon black. Raw carbon black, being covered with dust, light in weight and fluffy, will make the working environment dirty unless large-scale treatment measures are adopted. Because of this, casters commonly choose black masterbatches to complete the pre-dispersion of carbon black. This resin carrier is clean, free flowing and easy to use. The difficult dispersion properties of carbon black also plague masterbatch manufacturers. Highly loaded black masterbatches produced with single or double screw extruders have very poor dispersion properties. When these black masterbatches are blended or molded by the end user, they perform only slightly better than carbon black, but the results are equally unsatisfactory. To achieve a consistently high level of dispersion, a high level of shear mixer must be used to blend carbon blacks, such as FCM or Banbury blends. Using sufficient strength, these mixers allow the carbon black and the base resin to be completely mixed together. The type of carbon black used also affects the dispersion. The smaller the carbon black particles, the more difficult the dispersion will be.

The Covering Power Of Black Masterbatches

The second factor that determines the quality of the black masterbatch is the covering power. Large particles of carbon black have a poor coloring ability and do not easily cover all other colors in the lower layers, resulting in the final product getting only deviated colors. In the melting process, the ability to cover the existing color by correctly selecting the carbon black with high coloring ability first is the covering power.

Flowability Of Black Masterbatches 

Good flowability, If the masterbatch itself has good dispersion, but it cannot flow into the material to be molded, the production effect is not ideal. Generally speaking, the priming resin used to produce masterbatches has high rheology. In order to save costs, some masterbatch manufacturers use reused materials, scrap or recycled materials as resin carriers. The flow properties of the masterbatches produced in this way will be significantly reduced, and if the rheology is not good, the caster will have trouble with cycle times and appearance handling. Masterbatches with minimum dilution ratio can produce uniform and good dispersion of black.

Compatibility Of Black Masterbatches

Compatibility should be large Compatibility is the fourth factor that determines the quality of black masterbatches. If the masterbatch is produced using chips or recycled material, then it may contain contaminants or other non-melting polymers. In this case, a priming resin can be used to produce a high quality masterbatch, and the masterbatch will only be compatible during the melting process. High quality masterbatches can be produced using LLDPE, LDPE, HDPE, PP, PS, SAN, PA and other materials.

Stability Of Black Masterbatches

Stability should be consistent

A major manifestation of stability is a smooth carbon black ratio. If the percentage of carbon black is fluctuating, then the number of masterbatches that need to be melted is not the same, and it is impossible to produce the same shade of product. Of course, other factors such as the fluidity and dispersion of the injected melt should be consistent with the feeding quantity of each batch.

Lightness Of Black Masterbatches

The final factor that determines the quality of the black masterbatch is the lightness of the color. There are various types of carbon black available in the market for coloring masterbatches, but the color and price of each type are also very different. Large grain carbon blacks have lower coloration and different base colors than small grain carbon blacks. Large particle masterbatches are suitable for applications such as garbage bag film production, but not for products where aesthetics are important, such as TV signs or where UV protection is needed, such as agricultural films or exterior pipes. For these products, the more expensive small particle carbon black can be used.