Material Drying
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PCABS PC component hygroscopic characteristics
Fenómeno del problema
【Problem Phenomenon】Drying PC/ABS lightly according to the ABS approach, silver streaks and strength decline coexist in parts
Análisis de la causa
The PC component in PC/ABS is highly hygroscopic and easily hydrolyzed at high temperature, the ABS component also needs drying; the alloy drying requirement is executed according to the stricter PC side, light drying is enough only for ABS but not for PC
Solución
Dry according to PC-side standard: 100-120℃×3-4h, moisture content ≤0.02%; dehumidifying dryer preferred; keep the dried material hopper warm at 80℃ to prevent moisture regain
Conclusión clave
PC/ABS drying follows PC, 100-120℃×3-4h is the benchmark; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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