Extrusion & Post 8 views

EVA film blocking is severe

Problem Phenomenon

EVA film interlayer blocking >8N/15mm, cannot be slit

Cause Analysis

High VA content with strong surface adhesion; insufficient cooling, winding at >40°C

Solution

1) 0.3-0.5wt% erucamide antiblocking agent; 2) Winding <25°C; 3) 0.2wt% oleamide slip agent

Key Takeaway

EVA film blocking is caused by high VA tackiness and high-temperature winding; antiblocking agent and cooling are key

EVA film blocking antiblocking agent winding temperature erucamide

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