Extrusion & Post
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DSTDP film blocking, difficult to delaminate
Problem Phenomenon
DSTDP film interlayer blocking, delamination force >5N/15mm, automatic slitting machine cannot delaminate
Cause Analysis
DSTDP surface adhesion strong; film temperature too high >40°C during winding; low-molecular substances migrate to the surface forming an adhesive layer
Solution
1) Add 0.3-0.5wt% anti-blocking 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; anti-blocking agent and sufficient cooling are effective countermeasures
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