Processing Machinery
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PPO High Heat Resistance and Thermal Decomposition Temperature
Problem Phenomenon
【Problem Phenomenon】Worrying about PPO thermal stability and excessively lowering the processing temperature, causing filling difficulty
Cause Analysis
PPO thermal decomposition temperature reaches 350℃, with no obvious thermal degradation within 300℃; barrel temperature is usually controlled at 260-290℃ with ample safety margin, no need to excessively lower temperature
Solution
Set barrel temperature normally at 260-290℃; use the stability window within 300℃ to ensure flow; only above 300℃ is vigilance against degradation needed; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Key Takeaway
PPO is thermally stable within 300℃; no need to sacrifice flow for safety; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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