Material Drying
4 조회수
ASA hygroscopic characteristics and drying necessity
문제 현상
[Problem phenomenon] ASA product surface silver streaks and bubbles, mistakenly believing low hygroscopicity allows skipping drying for direct production
원인 분석
Although ASA has slightly lower hygroscopicity than ABS, it is still a hygroscopic material; moisture adsorbed on the pellet surface vaporizes during processing at 230-260°C; Plasthub clearly states ASA hygroscopicity requires light drying at 80°C×2-4h, otherwise residual moisture causes silver streaks
해결 방법
Dry at 80°C×2-4h before molding; in humid environments or long-opened bags, extend to 4h; desiccant dryer dew point below -30°C guarantees the endpoint; after adjustment, continuously sample to verify the effect, and resume mass production after confirming stability
핵심 요약
ASA light hygroscopicity is not a reason to skip drying, 80°C×2-4h is the silver streak defense line; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!