Injection Molding
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Barrel corrosion of PET '2079851475616104452 machine
Fenómeno del problema
When processing halogen-containing flame retardant PET, corrosion pits appear on the barrel and screw, shortening their life.
Análisis de la causa
Halogen flame retardants decompose at high temperature to produce acidic corrosive gases HCl/HBr; the screw and barrel materials are not corrosion-resistant.
Solución
Use corrosion-resistant bimetallic screws and barrels (containing nickel-chromium alloy); select non-halogen flame retardant systems (phosphorus-based, nitrogen-based); control processing temperature.
Conclusión clave
Flame retardant PET processing needs to be matched with corrosion-resistant equipment.
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