Processing Machinery
4 조회수
ASA processing equipment cross-contamination
문제 현상
After ASA shares equipment with halogen-containing materials such as PVC, the product shows black specks and accelerated degradation; investigation finds that previous material residue triggers catalytic degradation.
원인 분석
Residual decomposition products of halogen-containing materials such as PVC have a catalytic degradation effect on ASA; equipment dead corners hide previous material that continuously releases harmful substances at high temperature; ordinary purging is difficult to completely remove.
해결 방법
①ASA and halogen-containing materials preferably produced on dedicated lines; ②thoroughly purge and verify when sharing lines; ③regularly dismantle and clean screw and barrel dead corners; ④establish a material switching contraindication table.
핵심 요약
ASA is sensitive to previous halogen-containing residue; dedicated line production is the most reliable isolation; the material switching contraindication table is a basic management tool for error-proofing.; 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!