Processing Machinery
7 visualizações
ABS discoloration yellowing
Fenómeno do problema
[Problem Phenomenon] ABS product yellowing and hue drift
Análise das causas
Melt temperature too high and residence too long causing butadiene oxidation; regrind ratio fluctuation; insufficient color masterbatch temperature resistance; during on-site troubleshooting, verify item by item according to this mechanism, avoid blindly adjusting the machine based only on experience
Solução
Measure actual melt temperature and shorten residence; fix regrind; use temperature-resistant color masterbatch; after adjustment, continuously sample to verify the effect, resume mass production only after confirming stability; change only one variable each time and record parameter changes to facilitate locating effective measures
Conclusão principal
For ABS yellowing check heat history, butadiene oxidation is the root; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems later
Isto foi útil?
0 pessoas acharam isto útil
Obrigado pelo seu comentário!