Across global plastics processing — PP, PE, ABS, PA, PBT, PC, EVA, TPU, PVDF — most manufacturers still rely on conventional rubber-grade carbon blacks (N330, N550, N660, N772, N990) because they are widely available and inexpensive.
These conventional grades were never designed for plastics.
They were formulated decades ago for rubber reinforcement, not:
Conductive & ESD furnace blacks
Semi-, non-reinforcing + thermal-type blacks for
flow & UV performance
Low-odor, low-volatility plastics blacks
Premium jetness / aesthetic pigment blacks
balanced reinforcement & controlled viscosity