Processing Machinery
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PMMA Painting Precautions
Fenómeno do problema
After painting, the paint film cracks and peels, or solvent attack causes stress cracks in the substrate
Análise das causas
Solvents in the paint excessively attack PMMA and cause stress cracks; gasoline- or toluene-based paints are relatively compatible; warm storage before painting helps reduce painting defects; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solução
①Choose compatible gasoline- or toluene-based paints; ②anneal before painting to eliminate internal stress; ③warm-storage pretreatment of the material before painting; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability
Conclusão principal
The core of PMMA painting is paint compatibility; compatible paint plus annealing plus warm storage, three defenses against paint cracking; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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