Processing Machinery
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Insufficient LDPE Film ESCR
Fenómeno do problema
Packaging film in contact with contents such as detergents shows environmental stress cracking.
Análise das causas
The material's environmental stress crack resistance (ESCR) grade is insufficient; internal stress and the medium act together to induce cracks.; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience.
Solução
①Select a high-ESCR grade; ②Reduce processing internal stress; ③Conduct medium compatibility verification; ④Evaluate blend modification.; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusão principal
ESCR is a mandatory test item for medium-contact packaging; advancing material selection verification can avoid batch failure.; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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