Processing Machinery
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PPSU melt temperature management
Problem Phenomenon
PPSU products discolor or performance declines; melt temperature exceeds 385℃ or long-term high-temperature residence.
Cause Analysis
PPSU melt temperature 343~385℃; too high causes thermal degradation; long-term residence accumulates; transparent parts are color sensitive; mechanical properties decline.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solution
①Melt temperature 343~385℃ control; ②shorten residence time; ③actual temperature measurement and calibration; ④clean the machine after degradation; ⑤lower limit control for transparent applications.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
The 385℃ upper limit of PPSU is the degradation red line; transparent parts are managed more strictly; actual measurement prevents display errors.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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