Material Drying
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POE film moisture barrier insufficient
Problem Phenomenon
POE WVTR>20g/m²·24h, below the <5 requirement
Cause Analysis
POE octene branches increase intermolecular spacing, promoting water vapor transmission
Solution
1) Thicken 0.1-0.15mm to reduce WVTR; 2) POE/HDPE co-extrusion; 3) PVDC coating
Key Takeaway
POE moisture barrier insufficiency requires thickening, co-extrusion and coating to improve
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