Processing Machinery
6 visualizações
PVDF Melt Temperature Degradation
Fenómeno do problema
The product discolors and turns yellow, produces black specks, accompanied by a pungent odor.
Análise das causas
PVDF begins thermal decomposition and releases HF when the processing temperature exceeds about 300℃; loss of temperature control or excessive residence accelerates decomposition.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Solução
①Control the melt temperature within the 230~290℃ window; ②strictly prohibit exceeding 300℃; ③shorten the residence time; ④immediately lower the temperature, clean the machine, and ventilate after decomposition.
Conclusão principal
PVDF thermal decomposition releasing HF poses both quality and safety risks; 300℃ is an insurmountable red line.; After confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!