Production & Quality
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PTFE Cooling Crystallization Control
Problem Phenomenon
Improper PTFE cooling rate affects crystallinity, physical properties fluctuate, strain cracking.
Cause Analysis
Cooling rate relates to sheet crystallinity and is an important parameter affecting physical properties; too fast cooling easily causes strain and cracking; generally cooling at a rate of ≤50℃/h is more appropriate.
Solution
①Control cooling rate ≤50℃/h; ②Monitor crystallinity and performance correlation; ③Strain cracking inspection; ④Cooling curve records.; After adjustment, continuously sample to verify the effect, confirm stability before resuming mass production
Key Takeaway
PTFE cooling manages the dual goals of crystallinity and stress; 50℃/h is the balanced rate; curve records support quality traceability.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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