Extrusion & Post 9 Aufrufe

Poor interfacial bonding or delamination in multi-material molding

Problembeschreibung

Ursachenanalyse

Poor compatibility between cellulose acetate butyrate and co-injection material, weak interfacial bonding Large processing temperature difference between the two materials, process window difficult to match Large shrinkage rate difference, interfacial stress concentration Melt flow rates not matched during co-injection Material degradation or chemical reaction at the interface

Lösung

Select co-injection materials with good compatibility with cellulose acetate butyrate Reasonably set each runner temperature to match the two materials Consider shrinkage rate difference in design Adjust injection speed to match flow rates Verify interfacial bonding strength

Wichtigste Erkenntnis

Co-injection needs to be addressed from compatibility and process matching

co-injectioncompatibilityinterfaceshrinkage rate difference

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Poor interfacial bonding or delamination in multi-material molding

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