Processing Machinery
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TPU product surface oil gloss
Problem Phenomenon
Oily bright patches appear on the product surface.
Cause Analysis
Additives in the formulation exude to the surface; excessive temperature accelerates the exudation process; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry materials and should be confirmed first during troubleshooting
Solution
①control processing temperature; ②evaluate the additive system; ③observe recurrence after wiping; ④confirm the formulation with the supplier; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Oil gloss points to additive exudation; temperature control and formulation confirmation are the solution path; 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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