Extrusion & Post
9 Aufrufe
Poor Thickness Uniformity of PU Extruded Film
Problembeschreibung
PU extruded film transverse thickness deviation ±15%, exceeding the ±5% industry standard
Ursachenanalyse
Die flow channel design unreasonable causing uneven melt flow in the wide die; PU melt elasticity large, extrusion swell uneven; air ring cooling uneven
Lösung
1) Use coat-hanger die design to ensure uniform transverse flow; 2) Fine-tune die gap ±0.02mm; 3) Optimize air ring air volume and angle for uniform cooling; 4) Add a small amount of low-elasticity resin to reduce swell difference
Wichtigste Erkenntnis
Film thickness uniformity requires coordinated optimization from three aspects: die design, gap adjustment and cooling
War das hilfreich?
0 Personen fanden dies hilfreich
Vielen Dank für Ihr Feedback!