Processing Machinery
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PA66 product blooming
Problem Phenomenon
White exudation on the surface, affecting appearance.
Cause Analysis
Additive exudation; formula or process mismatch; high temperature speeds migration; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience; during troubleshooting, confirm item by item around key factors such as blooming and additives to avoid misjudgment.
Solution
①Check formula and additive system with the material supplier; ②adjust the process; ③check formula and processing window with the material supplier; ④perform additive exudation test evaluation; ⑤control processing and use temperature to reduce migration exudation.
Key Takeaway
PA66 blooming='additive': formula compatibility is the root cause; additive exudation is a gradual process, formula and process must match; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence.
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