What are the limitations of using PP special black masterbatches for coloring plastic products?

PP special black masterbatch is a kind of polymer material with carbon black content up to 35% and adding ratio of 1%-4%.PP special black masterbatch can be applied in PP injection molding, compression film, pelleting and other processes for plastic coloring, and in these fields, PP special black masterbatch coloring is undoubtedly excellent, but it has its limitations as well.

Unstable color

Black masterbatch for PP is mainly composed of three components: carbon black, carrier and additives. As a natural pigment, carbon black is more stable than other pigments. However, under the influence of certain factors, such as light, oxygen, humidity, etc., the color of PP black masterbatch will be unstable. In addition, there is a slight color difference between each batch of PP black masterbatches.

Wear and tear of product surface

PP special black masterbatch coloring is generally colored on the surface of the products, PP special black masterbatch pigment particle size is large, coloring the finished products are subjected to abrasion or cuts, the pigment is easy to fall off from the surface. This will lead to uneven coloring or complete shedding, thus reducing the coloring effect.

Not all raw materials are suitable

Most of the PP special black masterbatches are only suitable for some plastic products with the same plastic material as the base material, while some products with glass and metal as the base material, PP special black masterbatches can't be attached to the coloring.

Limitations in the field of application

In the medical field, some medical equipments often need to be sterilized, which will reduce the coloring ability of PP special black masterbatch, so PP special black masterbatch is not applicable to the field of medical equipments.

PP black masterbatch coloring plays an important role in some fields, but it also has its limitations. These limitations include color instability, abrasion, unchangeable color, inapplicability to certain substrates, and inapplicability to certain applications. Understanding these limitations can help people better choose the right coloring method and avoid unnecessary losses due to poor coloring results.