Processing Machinery
5 조회수
Product aging yellowing and discoloration
문제 현상
The product appears dark yellow to brown, and transparency is significantly reduced
원인 분석
Processing temperature exceeds the safe upper limit (>400°C), thermo-oxidative degradation occurs generating chromophoric groups; material stays in the barrel too long; heat stabilizer system insufficient
해결 방법
Control the processing window of melt temperature at 350-390°C; shorten residence time to <5 minutes; increase the proportion of antioxidants and heat stabilizers
핵심 요약
The thermo-oxidative stability of PEI needs to be guaranteed through a reasonable processing window and additives
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!