Extrusion & Post
10 조회수
Transverse Ripples on EVOH Extruded Film
문제 현상
EVOH extruded film surface shows transverse periodic ripples with wavelength 5-10mm
원인 분석
Haul-off roller vibration or unstable rotation speed producing periodic stretching changes; chill roll eccentricity or out-of-round surface causing periodic contact pressure changes
해결 방법
1) Overhaul haul-off rollers to eliminate vibration; 2) Re-round chill roll with eccentricity <0.02mm; 3) Install pressure stabilizing device on extruder to eliminate pressure fluctuations; 4) Stably control haul-off speed ±0.5%
핵심 요약
Transverse ripples are caused by haul-off vibration and roll eccentricity; equipment overhaul and stable control are key
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