Material Drying
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PMMA Haze (Clouding)
Fenómeno del problema
Transparent parts are hazy, and light transmittance decreases.
Análisis de la causa
Moisture degradation, shear overheating or mold surface contamination/insufficient polishing; PMMA transparency is extremely sensitive to moisture and temperature.
Solución
①Strict drying (moisture <0.1%); ②Control melt temperature and shear heat; ③Cavity mirror polishing and cleaning; ④Mold temperature 70~90℃.
Conclusión clave
Haze = three answers: water, heat, mold surface.
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