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