Material Drying
4 조회수
PA6 Dew Point -40°C Control
문제 현상
The dryer runs normally but PA6 products still have fine silver streaks; testing finds the drying air dew point is only -20°C
원인 분석
The dew point of the drying air determines the dehydration capacity; at a dew point of -20°C, the residual moisture in the air still causes PA6 to reach an absorption-desorption equilibrium in the later stage of drying, with the moisture content stuck at about 0.3% and unable to decrease further
해결 방법
Overhaul the dryer molecular sieve, confirm that the regeneration temperature and regeneration cycle are normal, use a dew point meter to actually measure the drying air dew point which should be stable below -40°C, and replace the molecular sieve in time when it powders and fails
핵심 요약
Dew point is the first indicator of PA6 drying effectiveness; regularly testing the dew point is more effective than extending the drying time; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!