Injection Molding
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LLDPE '2079851475616104452 ESCR application
Fenómeno del problema
LLDPE containers holding detergent do not crack in long-term use, while HDPE containers fail
Análisis de la causa
LLDPE's ESCR is the best among the three major polyethylenes; short-chain branch structure provides excellent environmental stress cracking resistance; LLDPE is the first choice for media contact scenarios such as detergents and greases
Solución
①Prefer LLDPE for media-contact containers; ②perform long-term immersion verification with actual media; ③use high-ESCR grades for harsh conditions; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
ESCR is LLDPE's core competitiveness; LLDPE should have a default seat in the material selection list for media contact scenarios; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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