Processing Machinery
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TPU product low-temperature hardening
Problem Phenomenon
The product hardens and elasticity decreases in cold environments.
Cause Analysis
Soft segment crystallization or vitrification of TPU at low temperature affects elasticity; low-temperature performance varies greatly between grades; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①select low-temperature resistant grades; ②do low-temperature test verification; ③evaluate formulation influence; ④manage the use temperature range; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
For low-temperature applications, select materials according to the grade's low-temperature performance; test verification is indispensable; 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 similar problems later
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