Extrusion & Post
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POE extrusion surface rough
Problem Phenomenon
POE extruded product surface roughness Ra>5μm, exceeding requirement
Cause Analysis
Extrusion temperature too low <160°C, melt flow unstable; die inner wall rough or damaged; POE melt elasticity, die swell uneven
Solution
1) Raise extrusion temperature to 160-200°C; 2) Polish die inner wall to Ra<0.4μm; 3) Reduce extrusion rate 10-15%; 4) Add 0.3-0.5wt% external lubricant
Key Takeaway
Surface roughness is caused by low-temperature extrusion and die defects; raising temperature and polishing the die are core countermeasures
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