Q: Why is filler masterbatch used in blown film production?
Filler masterbatch reduces the overall cost of polyethylene (PE) films while improving stiffness and printability. It’s ideal for producing shopping bags, garbage liners, and agricultural films.

Q: Will it affect film transparency?
Yes. Filler content directly impacts clarity. Low loading (5–15%) maintains semi-transparent films, while higher loadings are more suitable for opaque applications.

Q: Does it impact film strength?
When used correctly, it can actually improve film stiffness and heat resistance. However, excessive filler can reduce elongation and tear strength.

Q: How to ensure uniform film thickness?
Use high-dispersion filler masterbatch with a compatible carrier resin. A consistent melt flow index helps maintain thickness control and film uniformity.

Q: What types of filler are commonly used in film blowing?
Calcium carbonate (CaCO₃) is the most popular, followed by talc for better thermal stability and anti-blocking effect.