Material Drying
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Transparency decline and fogging of PETG injection molded products
Fenómeno del problema
The transparency of PETG products declines significantly, becoming translucent or foggy, failing to achieve the transparent packaging effect.
Análisis de la causa
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.
Solución
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.
Conclusión clave
The core of PETG high transparency lies in full drying and precise temperature control.
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