Production & Quality
14 visualizações
Surface micro-cracks of PU
Fenómeno do problema
0.05-0.2mm micro-cracks appear on PU product surface, affecting appearance and strength
Análise das causas
Internal stress of PU products too large, exceeding material yield stress; environmental stress cracking; product design stress concentration
Solução
1) Annealing treatment to release internal stress; 2) Product design avoiding sharp corners and stress concentration; 3) Select high molecular weight PU to improve crack resistance
Conclusão principal
Micro-cracks are caused by excessive internal stress; annealing and crack-resistant design are key
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!