The pigment carbon black generally can color the plastic well, and the pigment carbon black can be selected according to the coloring property or the physicochemical property, and the selection of the coloring carbon black is basically determined by the necessity of the blackness of the waste. Very fine pigment carbon black can be used to achieve particularly high coloration of blackness; PE garbage bags, plastic bags, cable materials and other products only need a medium level of blackness, can use a lower carbon content than the outer surface, higher structure Variety; when plastic coloring, the slight error of carbon black weighing and compounding will lead to obvious chromatic aberration. Therefore, it is better to use low-color carbon black with large particle size and poor tinting strength, so that the amount of carbon black can be used. Slightly larger, the weighing error is relatively small, and has the advantages of better dispersion and lower price.
For gray plastics, the use of fine-grained pigment black tends to appear brownish gray, while the coarse-particle pigmented carbon black can produce blue-phase gray.
Compared with other organic pigments, carbon black has better performance in addition to dispersion. The scientific amount of carbon black can provide better antistatic or electrical conductivity.
Carbon black is basically non-toxic but relatively easy to fly and pollute. Therefore, it is often used in the form of masterbatch for the plastics industry to eliminate the pollution and improve the dispersion of carbon black in plastics.
Carbon black is used as a pigment for plastics, and the usual dosage forms are powdery and granular. Granular carbon black is less flying, but it is difficult to disperse, so powdered carbon black is used in plastic coloring.