Processing Machinery
3 조회수
PVC Processing Window 160-195℃
문제 현상
PVC products yellow and discolor, degradation signs appear when barrel temperature is slightly high, process adjustment space extremely small
원인 분석
PVC is the general-purpose plastic with the worst thermal stability, processing window only 160-195℃, absolute upper limit 200℃; exceeding it starts the de-HCl degradation chain reaction, temperature tolerance only ±5-10℃
해결 방법
①Melt temperature rigid 175-195℃, soft 160-180℃; ②Absolutely not exceeding 200℃; ③Temperature control precision ±3℃ and regularly calibrate thermocouples
핵심 요약
PVC temperature discipline is the strictest among general-purpose plastics; 200℃ is an untouchable red line, the narrow window determines dual high requirements for equipment and management; 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!