Material Drying
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PA6 Color Masterbatch Carrier Drying
Fenómeno do problema
PA6 products with color masterbatch added show silver streaks, while natural-colored material produces normally
Análise das causas
The hygroscopic characteristics of the color masterbatch carrier resin and pigments differ from the base material; some color masterbatch is not fully dried or absorbs moisture during storage, and the moisture brought in after addition is released in the cavity; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solução
Color masterbatch is dried according to supplier requirements, generally under the same conditions as the base material for 1-2 hours; use up small packages of color masterbatch as soon as possible after opening, and dry damp color masterbatch before use; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
Conclusão principal
The moisture brought in by color masterbatch is often overlooked, and synchronous drying with the base material is a necessary measure; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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