Processing Machinery
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TPU Winter Compensation
Problem Phenomenon
TPU products in winter have high hardness and are brittle
Cause Analysis
Low temperature makes the hard segments of TPU fully crystallize, changing the feel and toughness of the product; when troubleshooting on site, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solution
Appropriately increase mold temperature in winter; store products at constant temperature; include hardness testing in first-piece inspection; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
TPU performance changes in winter require process compensation; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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