In polymer processing and rheology, melt fracture (also called extrudate distortion) is a family of viscoelastic flow instabilities that appear when a polymer melt is extruded through a die above a critical throughput, distorting the surface or the bulk of the emerging strand. The Reynolds number in such flows is essentially zero, but the elasticity of the melt is sufficient to drive instability.
In polymer processing and rheology, melt fracture (also called extrudate distortion) is a family of viscoelastic flow instabilities that appear when a polymer melt is extruded through a die above a critical throughput, distorting the surface or the bulk of the emerging strand. The Reynolds number in such flows is essentially zero, but the elasticity of the melt is sufficient to drive instability.
Source: Wikipedia "Melt fracture" · CC BY-SA 4.0
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