Extrusion & Post
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EVOH Internal Delamination Cracking
Fenómeno del problema
EVOH products delaminate internally, cracking along the interface
Análisis de la causa
Poor interfacial adhesion between EVOH and incompatible fillers or blend components; cooling shrinkage differences causing interlayer stress
Solución
1) Use compatibilizer to improve interfacial adhesion; 2) Uniform cooling to reduce interlayer stress; 3) Reduce addition of incompatible components
Conclusión clave
Internal delamination is caused by poor interface and shrinkage differences; compatibilizer and uniform cooling are key
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