Material Drying
6 Aufrufe
PET Sheet Extrusion Crystallization Haze
Problembeschreibung
PET sheet has poor transparency and haze.
Ursachenanalyse
Improper chill roll temperature causes sheet crystallization; or insufficient drying hydrolysis haze.
Lösung
①Optimize chill roll temperature (quickly pass through the crystallization temperature zone); ②fully dry; ③stable extrusion temperature.
Wichtigste Erkenntnis
Sheet haze = cooling rate and moisture.
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