Extrusion & Post
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PA6 Product Surface Blooming
Problem Phenomenon
White precipitation on the surface after placement, affecting appearance and coating.
Cause Analysis
Additive (lubricant/nucleating agent) precipitation; formula or process mismatch; high temperature and fast migration; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solution
①Evaluate the compatibility of the additive system with the material;②adjust the material temperature to a reasonable range;③check with the material supplier whether the formula and additive system match;④perform additive precipitation test evaluation;⑤control the use environment temperature to reduce migration and precipitation.
Key Takeaway
PA6 blooming = 'additive precipitation': formula compatibility is the root; additive precipitation is a gradual process, and formula and process must match; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence.
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