Material Drying
3 Aufrufe
Transparency decline and fogging of PETG injection molded products
Problembeschreibung
The transparency of PETG products declines significantly, becoming translucent or foggy, failing to achieve the transparent packaging effect.
Ursachenanalyse
Insufficient drying with excessive moisture produces bubbles and foggy scattering during processing; processing temperature on the high side produces degradation products; mold roughness is insufficient.
Lösung
Dry at 65-70°C for 4-6h to moisture <0.01%; control processing temperature at 220-250°C; polish the mold to a mirror finish Ra≤0.05μm.
Wichtigste Erkenntnis
The core of PETG high transparency lies in full drying and precise temperature control.
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