A carbon black masterbatch is a type of color masterbatch that uses carbon black pigment dispersed in a polymer carrier resin. It is primarily used to impart deep black color, improve UV resistance, and enhance the mechanical and conductive properties of plastic products.
1. Composition
- Carbon black pigment (high concentration, typically 20–50%)
- Carrier resin (such as PE, PP, PS, or other compatible polymers)
- Additives (like dispersing agents or stabilizers to improve processing and performance)
2. Key Functions
- Coloration: Provides a uniform, deep black shade to plastics.
- UV Protection: Carbon black absorbs UV radiation, protecting plastics from degradation and extending product life.
- Conductivity (special grades): Certain carbon black masterbatches are designed to make plastics electrically conductive or antistatic.
- Opacity & Coverage: Even in low dosage, it gives excellent coverage and masking ability.
3. Applications
- Packaging films (shopping bags, garbage bags, agricultural films)
- Pipes & cables (protection from UV and weathering)
- Automotive parts (interior and exterior components)
- Electrical & electronics (cable sheathing, conductive plastics)
- Household products (containers, furniture, appliances)
4. Advantages
- Cost-effective black coloration compared to dry pigments.
- Easy to handle, dust-free, and provides consistent dispersion.
- Improves plastic durability against sunlight, heat, and chemicals.
? In short: A carbon black masterbatch is a concentrated black pigment formulation used in plastics to provide strong black coloring, UV protection, and sometimes conductivity, making it one of the most widely used masterbatches in the plastics industry.