Blow Molding
4 조회수
Severe Parison Sag in PU Extrusion '2079851475616104457
문제 현상
PU extrusion '2079851475616104457 parison sag 20-40mm, causing bottle bottom wall thickness only 0.3-0.4mm
원인 분석
PU melt strength low, parison stretched thin under gravity; parison extrusion speed slow increasing sag time; parison temperature too high, viscosity low, aggravating sag
해결 방법
1) Add slight crosslinking agent 0.3-0.5wt% to increase melt strength; 2) Increase parison extrusion speed to shorten sag time; 3) Reduce parison temperature by 10-15°C to increase viscosity; 4) Wall thickness controller to compensate sag
핵심 요약
Parison sag is caused by low melt strength; slight crosslinking and wall thickness control are key
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!