Extrusion & Post
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DSTDP film poor print adhesion
Problem Phenomenon
DSTDP film ink adhesion after printing <2 grade, cross-cut test large-area peeling off
Cause Analysis
DSTDP surface polarity has poor affinity with ink; corona treatment effect decays fast; ink system not matched with DSTDP
Solution
1) Print immediately after corona treatment within 24h; 2) use DSTDP-specific ink; 3) increase corona power to 15-20kW/m² to ensure surface tension >42mN/m; 4) flame treatment to assist surface polarization
Key Takeaway
Poor print adhesion is caused by insufficient surface polarity; corona treatment and special ink are key
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