Extrusion & Post 9 Aufrufe

EVA and HDPE blend delamination

Problembeschreibung

In EVA/HDPE cross-section, EVA concentrates in the inner layer

Ursachenanalyse

Large viscosity difference; low-viscosity EVA migrates toward the pipe wall

Lösung

1) VA15-18% EVA with viscosity closer to HDPE; 2) Blending at 170-185°C to enhance compatibility; 3) EVA-g-MAH 1-2wt%

Wichtigste Erkenntnis

EVA/HDPE delamination is driven by viscosity difference; viscosity matching and compatibilizer are key

EVA/HDPE delamination viscosity difference VA content compatibilizer

War das hilfreich?

0 Personen fanden dies hilfreich