Material Drying
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PC Transparent Part Optical Standards
Fenómeno del problema
The light transmittance of optical lenses and lamp covers fluctuates, and the color difference and haze exceed the standard between different batches
Análisis de la causa
PC light transmittance is about 88-90%, lower than PMMA's 92%, and is more sensitive to process fluctuations; slight changes in melt temperature, mold temperature and moisture content are all reflected in the optical performance
Solución
①Dedicated batch management of optical-grade raw materials; ②dehumidification drying at 110-120°C×4-6h; ③establish a first-piece inspection system for light transmittance and haze, with process parameters locked
Conclusión clave
Optical-grade PC is the highest standard of process control; parameter locking plus first-piece optical inspection eliminates fluctuations before mass production; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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