Material Drying
4 조회수
PA6 Poor Coating Adhesion
문제 현상
After spray coating of PA6 product surfaces, the paint film adhesion is poor, peeling off in the cross-cut test
원인 분석
PA6 surface energy is moderate and release agent residue blocks paint film wetting; surface moisture after moisture absorption also affects adhesion, and incomplete pretreatment is the main cause; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based only on experience
해결 방법
Wipe with solvent before spraying to remove release agent and dry to remove moisture; use flame or plasma treatment to raise surface energy; use PA6-specific primer; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
핵심 요약
Spray coating adhesion is guaranteed by pretreatment, and degreasing, dehumidifying plus surface activation are all indispensable; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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