Characterization of Flow Instabilities to avoid surface defects during extrusion of polymers

Surface defects during polymer extrusion? The problem often starts earlier than you might think.

The so-called Shark Skin effect occurs when flow instabilities arise at higher shear rates. The surface becomes rough, the process unstable and throughput is limited.

The challenge is that by the time the defect becomes visible, the instability is already fully developed.

With our Shark Skin Add-on, these instabilities become measurable before they appear on the surface. High-frequency pressure measurement enables you to identify early when the stable operating window is reaching its limit.

What does this mean for you in practice?
• Define the maximum stable process window
• Safely explore higher throughput
• Compare materials in a targeted way
• Evaluate the impact of additives
• Avoid costly production trials