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Problema y solución

Respuestas prácticas a los desafíos comunes de los materiales plásticos

11636 preguntas
Q
Unstable dimensions in EVA extrusion
A
Extrusion dimensional stability depends on feeding precision, temperature control and haul-off synchronization
Extrusion & Post EVA extrusion dimensional stability feeding control temperature PID haul-off synchronization
Q
Warpage deformation in EVA '2079851475616104452
A
Warpage is caused by shrinkage differences and orientation stress; uniform mold temperature and holding pressure are key
Injection Molding EVA injection warpage shrinkage rate holding pressure annealing treatment
Q
Premature gate freezing in EVA '2079851475616104452
A
Premature gate freezing is caused by small gate and low temperature; enlarging gate and raising temperature are fundamental measures
Injection Molding EVA injection gate freezing holding pressure transmission gate size mold temperature
Q
Burning from mold venting in EVA '2079851475616104452
A
Burning is caused by insufficient venting and high speed injection compressing air; increasing venting and reducing speed are key
Injection Molding EVA injection mold burning vent grooves injection speed air compression
Q
Die deposit and carbon buildup in EVA extrusion
A
Die carbon buildup is caused by thermal oxidation and untimely cleaning; PE flushing and timely cleaning are key
Extrusion & Post EVA extrusion die carbon buildup PE flushing stagnation zone thermal oxidation
Q
Delamination of EVA blended with incompatible resins
A
Blends with large polarity difference need reactive compatibilizer to form chemical bonding at the interface
Extrusion & Post EVA blend delamination polarity difference EVA-g-MAH reactive compatibilization interfacial bonding
Q
Connected pellets in EVA extrusion pelletizing
A
Connected pellets are caused by elastic recovery and low temperature pelletizing; high temperature water cutting and fast cutting are key
Extrusion & Post EVA pelletizing connected pellets pelletizing water temperature cutter speed elastic recovery
Q
Severe parison sag in EVA extrusion '2079851475616104457
A
Parison sag is caused by low melt strength; slight crosslinking and wall thickness control are key
Blow Molding EVA '2079851475616104457 parison sag melt strength slight crosslinking wall thickness control
Q
Yellowing of EVA products after processing
A
Yellowing is caused by thermo-photo-oxidation and metal catalysis; completing antioxidant system and UV absorber is key
Production & Quality EVA yellowing thermo-oxidation antioxidant UV absorber metal catalysis
Q
Dimensional change of EVA products during long-term storage
A
Dimensional change is caused by physical aging; annealing treatment and slight crosslinking are measures to stabilize dimensions
Material Analysis EVA dimensional stability physical aging annealing secondary crystallization slight crosslinking
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