Extrusion & Post
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EVOH Internal Delamination Cracking
Fenómeno do problema
EVOH products delaminate internally, cracking along the interface
Análise das causas
Poor interfacial adhesion between EVOH and incompatible fillers or blend components; cooling shrinkage differences causing interlayer stress
Solução
1) Use compatibilizer to improve interfacial adhesion; 2) Uniform cooling to reduce interlayer stress; 3) Reduce addition of incompatible components
Conclusão principal
Internal delamination is caused by poor interface and shrinkage differences; compatibilizer and uniform cooling are key
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