What Is Carbon Black Masterbatch? A Practical Guide
Carbon black masterbatch is a concentrated dispersion of carbon black pigment — typically 8% to 49% by weight — pre-mixed into a carrier resin such as PE, EVA, SAN, PC or PA.
Added to virgin or recycled polymer at 1–4% during processing, it gives plastics uniform black color, opacity, UV protection and, at higher loadings, antistatic or conductive properties.
Using a masterbatch instead of raw carbon black powder means cleaner handling, far better dispersion and consistent, repeatable results across blown film, injection molding and extrusion.
Choosing a grade comes down to three questions: which base resin you run, how much opacity and jetness you need, and whether the part faces UV, heat, food contact or mechanical stress. Match the carrier resin to your polymer, then select CB content and additive package accordingly.