Material Drying
3 조회수
PPO Low Water Absorption Still Requires Standardized Drying
문제 현상
【Problem Phenomenon】Drying is omitted because PPO's water absorption rate is low, and silver streaks and unsmooth phenomena appear on the product surface, with batch appearance defects
원인 분석
PPO's water absorption rate is only about 0.06%, a low water absorption material, but trace moisture causes surface silver streaks and other unsmooth defects; GTX974 data clearly states that trace moisture is the culprit of silver streaks, and drying treatment is best performed
해결 방법
Appearance parts are dried according to specifications before molding; moisture content is accepted at an upper limit of 0.02%; material in intact sealed packaging can be used directly, material exposed after bag opening must be re-dried
핵심 요약
Low water absorption of PPO does not mean no drying is needed; 0.02% moisture content is the appearance bottom line; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!