Processing Machinery
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LDPE Stress Cracking
Fenómeno do problema
LDPE containers crack after holding detergent
Análise das causas
LDPE has limited resistance to environmental stress cracking, and active agents induce it; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solução
Select high-ESCR grades; reduce stress in the structure; compatibility verification; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes, so as to locate the effective measure
Conclusão principal
LDPE stress cracking selects material according to ESCR; after confirming effectiveness, solidify 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 in the future
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