Process Features
The key to masterbatch production is pigment pre-dispersion. Pigment agglomerates are hard to break directly in twin-screw extruders; high-concentration pre-dispersion in a kneader (pigment content 50%+) precedes dilution and pelletizing.
- Pre-dispersion concentration: 50%+ pigment, paste-like high-viscosity system
- Shear intensity: strong Z-blade shear effectively opens agglomerates
- Uniformity: ensures downstream color consistency
Recommended Models
- Horizontal kneader: large-capacity pre-dispersion
- Hydraulic tilting: convenient discharge for viscous systems
Typical Options
- Reinforced blades
- Heating/cooling jacket
- Vacuum system (optional)