Processing Machinery
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PET vs PP meal box selection
Fenómeno do problema
PET meal boxes deform after microwave heating
Análise das causas
PET's heat resistance temperature is lower than the peak temperature of microwave heating, and oily food is locally overheated; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solução
Switch microwave meal boxes to PP; label PET meal boxes as microwave-prohibited; select materials according to heating method and label them; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusão principal
Microwave scenarios are PP's territory; PET must be clearly marked as prohibited; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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