Extrusion & Post
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Fast Pressure Differential Rise of LDPE Extrusion Filter Screen
Problem Phenomenon
Frequent screen changes.
Cause Analysis
LDPE easily oxidizes into gels, and cross-linked matter intercepted by the screen accumulates; regrind has many impurities.
Solution
①Standardize shutdown to prevent gels; ②control regrind; ③screen gradient configuration; ④automatic screen changer.
Key Takeaway
Fast pressure differential rise = dual sources of gel + impurities.
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