1. Why use filler masterbatch instead of raw powder in extrusion?

Filler masterbatch provides better dispersion, reduces dust in production, and improves processing stability compared to directly mixing talc or calcium carbonate powders. It also ensures consistent mechanical properties in extruded products.

2. How much calcium carbonate can be added in blown film extrusion?

Typically, 5–20% of calcium carbonate filler masterbatch can be used in PE blown film. Ultrafine grades help maintain transparency and strength, while reducing production costs.

3. What are the benefits of using talc in compounding and pelletizing?

Talc acts as a nucleating agent in polypropylene (PP), improving stiffness, heat resistance, and dimensional stability. It also helps in smoother pelletizing by reducing melt stickiness.

4. Can filler masterbatch improve cycle time in injection and extrusion?

Yes. Talc-filled masterbatch shortens cooling and crystallization time in PP, reducing overall cycle time in both injection molding and extrusion processes. This increases productivity while lowering costs.

5. What is the difference between coated and uncoated filler in pelletizing?

Coated fillers (with stearic acid or silane) enhance polymer compatibility and melt flow during pelletizing. Uncoated fillers are more economical but may cause higher energy consumption and poor dispersion in extrusion.