Extrusion & Post
10 조회수
Rough Surface in PU Extrusion
문제 현상
PU extruded product surface roughness Ra>5μm, exceeding the requirement
원인 분석
Extrusion temperature too low <60°C, melt flow unstable; die inner wall rough or damaged; PU melt elasticity, extrusion swell uneven
해결 방법
1) Increase extrusion temperature to 60-120°C; 2) Polish die inner wall Ra<0.4μm; 3) Reduce extrusion rate by 10-15%; 4) Add 0.3-0.5wt% external lubricant
핵심 요약
Surface roughness is caused by low-temperature extrusion and die defects; increasing temperature and polishing the die are the core countermeasures
이 정보가 도움이 되었나요?
0 명이 도움이 되었다고 합니다
의견 주셔서 감사합니다!