Polymer Compounding
Optimizing Materials in a Targeted Manner
What is compounding?
Compounding refers to the targeted mixing and processing of materials to produce specific properties. In this process, base polymers are combined with additives, fillers, fibers, pigments, or functional components. The goal is to specifically influence the mechanical, thermal, electrical, or chemical properties of the end product.
Why is compounding done?
Compounding can be used to influence properties:
- Strength
- Flexibility
- Electrical Conductivity
- Temperature Resistance
- Flame Retardancy
- Color
Typical Additives Used in Compounding
- Dyes and Pigments
- Reinforcing fibers
- Mineral fillers
- Flame retardants
- Antistatic agents
- Conductive Additives
- Stabilizers
- Active Pharmaceutical Ingredients
Why are twin-screw extruders used for compounding?
Twin-screw extruders provide excellent mixing action and ensure uniform distribution of all components. Thanks to the modular design of the screws, feeding, mixing, kneading, and degassing zones can be optimally combined. This makes it possible to reproduce even complex formulations.
From the Lab to Production
Compounding often begins on a laboratory scale. Once development is complete, the process is scaled up to pilot and production facilities.
A controlled scale-up process plays a crucial role in this.