Extrusion & Post
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Frequent screen clogging in EAA extrusion
Problem Phenomenon
EAA extrusion requires screen replacement every 2-3h, clogging causes sudden pressure rise and output decline
Cause Analysis
Many gel particles and impurities in the raw material; screen mesh too high, intercepting a large number of particles; filler or color masterbatch agglomeration clogs the screen
Solution
1) Select raw materials with low gel content; 2) Use stepped screens 40/80/120 mesh; 3) Add filler and color masterbatch by the masterbatch method to reduce agglomeration; 4) Install an automatic screen changer to reduce downtime
Key Takeaway
Screen clogging is caused by impurities and improper configuration; raw material control and stepped screens are the key
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