Material Drying
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PA6 Accelerated Conditioning Standard
Problem Phenomenon
The natural conditioning cycle lasts several weeks, the interior of thick-walled parts cannot be fully penetrated for a long time, and performance test data are scattered
Cause Analysis
PA6 moisture absorption diffuses slowly from the surface to the interior; a 4mm thick part takes more than one year to reach equilibrium at 23°C/50%RH; natural conditioning of thick-walled parts is extremely inefficient and uneven inside and out
Solution
①Use accelerated conditioning at 70°C/62%RH according to ISO1110; ②Store thick-walled parts sealed after conditioning to prevent surface water loss; ③Test mechanical property specimens only after unifying the conditioning state
Key Takeaway
Accelerated conditioning compresses the PA6 moisture absorption process measured in years into a few days; the ISO1110 conditions are equivalent to the standard atmosphere, and thick-walled parts need sealing to prevent re-drying
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