Material Drying
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PA6 Post-Drying Conveying Moisture Protection
Fenómeno do problema
Qualified dried PA6 shows moisture exceeding the standard again after being conveyed to the machine via open conveying
Análise das causas
Dried PA6 above 80°C is in a strongly hygroscopic state, and exposure to humid air for a few minutes can re-absorb a large amount of moisture; open screw conveying or manual transfer causes the dried material to re-absorb moisture
Solução
Dried material is conveyed to the machine via enclosed pipelines with hot-air insulation, or the drying hopper is installed directly above the '2079851475616104452 machine for drying and immediate use; the transfer process is controlled within 10 minutes and uses enclosed containers
Conclusão principal
Post-drying moisture protection is as important as drying itself, and enclosed conveying is the key to preventing moisture re-absorption; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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