TPU melt fracture causing surface defects

문제 현상

Periodic irregular wrinkles on the extrusion and injection surfaces

원인 분석

The shear stress at the die exit exceeds the critical value, elastic instability

해결 방법

Reduce the extrusion speed, raise the die temperature, increase the gap

핵심 요약

A typical rheological problem in extrusion processing

TPU、melt fracture

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