Extrusion & Post 8 views

Insufficient EMA transparency

Problem Phenomenon

EMA film haze >20%, below the 5% transparent packaging requirement

Cause Analysis

EMA methyl methacrylate content too low with crystalline region scattering; extrusion cooling rate too fast

Solution

1) High MMA content EMA with MMA>20% to lower crystallinity; 2) Lower cooling rate; 3) 0.3wt% nucleating agent for uniform crystallization

Key Takeaway

EMA transparency is affected by MMA content and crystallization scattering

EMA film transparency haze MMA content nucleating agent

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