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What is Sharkskin Defects in Polymer Extrusion about?
The document discusses different types of extrusion instabilities that can occur during polymer processing as the flow rate increases. At low flow rates, the extrudate is smooth but sharkskin defects can occur at higher rates. Further increasing the flow can cause stick-slip instability. Superflow may exist at very high rates where the extrudate is smooth again. Methods to minimize sharkskin include modifying the die surface, using die exit curvature, and adding additives. Melt fracture can occur at even hi
- Author
- Diksha Singla
- Language
- EN