Extrusion & Post
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MP extrusion screen frequent clogging
Problem Phenomenon
MP extrusion requires screen replacement every 2-3h, clogging causes pressure surge and output decrease
Cause Analysis
raw material contains many gel particles and impurities; screen mesh too high intercepting many particles; filler or color masterbatch agglomeration clogging the screen
Solution
1) select raw material 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 key
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