Extrusion & Post
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Unstable film bubble in PLA blown film process
Problembeschreibung
The film bubble swings and breaks during the PLA blown film process.
Ursachenanalyse
The PLA melt strength is low, the film bubble is greatly affected by the air flow and is unstable, and the cooling is uneven.
Lösung
Use melt strength enhanced PLA (branched PLA); stabilize the cooling air ring.
Wichtigste Erkenntnis
PLA blown film needs to enhance the melt strength.
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