We find that steel is the most commonly used material for screens in the extrusion process. Stainless steel may be slightly more expensive, but has the added benefit that it will not rust.

Rust can cause a big problem if it ends up in your extrudate or worse still, a rusted screen is more likely to break and let contamination through.

It can be avoided if you ensure your screen is stored away from moisture or better still, wrapped in plastic bags or rust-preventing paper.

If you are extruding fluropolymers or PVC, we recommend using our Monel metal. It’s an alloy of nickel and copper that combines strength with excellent resistance to acids and alkalis, making it corrosion free.

If you’d like more specific advice on what screen you should use in your extrusion process, speak to one of our technical advisers by getting in touch with us.