Extrusion & Post
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MP film blocking, difficult delamination
Problem Phenomenon
MP film interlayer blocking, delamination force >5N/15mm, automatic slitting machine cannot separate the layers
Cause Analysis
MP surface adhesion strong; film temperature too high >40°C during winding; low molecular species migrate to the surface forming an adhesive layer
Solution
1) add 0.3-0.5wt% antiblocking agent erucamide; 2) fully cool to <25°C before winding; 3) add 0.2wt% slip agent to synergistically reduce blocking; 4) reduce winding tension to reduce interlayer pressure
Key Takeaway
film blocking is caused by surface tackiness and high-temperature winding; antiblocking agent and full cooling are effective countermeasures
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