Surface defects in polymer extrusion?
Surface defects in polymer extrusion?
Have you ever experienced surface defects in 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 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 are visible on the surface.
High-frequency pressure measurement makes it possible to identify early on when the stable operating window is reaching its limit.
Oleinitec’s supplier GÖTTFERT has released yet another add-on to its rheometers for optimising the extrusion process.
With our Shark Skin add-on, these instabilities become measurable before they are visible on the surface. High-frequency pressure measurement makes it possible to identify early on when the stable operating window reaches its limit.
An important advantage: our improved solution can be used by all manufacturers and supports both new and recycled materials, making it perfectly suited to today’s changing and sustainable needs in polymer processing.
Our new Shark Skin Addon can be integrated with
- GÖTTFERT capillary rheometers,
- GÖTTFERT laboratory extruders
and
- laboratory extruders from other manufacturers
Our enhanced Addon solution provides a powerful basis for improved extrusion quality, reproducible results and higher process reliability.
Thanks to its modular architecture, it enables precise, data-driven process optimisation and supports R&D and quality assurance teams regardless of the material being processed.
We look forward to continuing on this innovative path – together with everyone who is shaping the future of efficient, sustainable and highly accurate polymer extrusion.
The so-called Shark Skin effect occurs when flow instabilities arise at higher shear rates. The surface becomes rough, the process unstable and throughput 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 are visible on the surface. High-frequency pressure measurement makes it possible to identify early on when the stable operating window reaches its limit.
What does this mean for you in real terms?
- Define the maximum stable process window.
- Safely explore higher throughput.
- Compare materials in a targeted manner.
- Evaluate the effect of additives.
- Avoid costly production trials.
The Shark Skin attachment can be used with both GÖTTFERT capillary rheometers and standard laboratory extruders.
Read more on Göttfert’s website
Contact us at Oleinitec Nordic AB, which represents Göttfert throughout the Nordic region, if you would like to know more.
