Molding Process
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PPS thermal stability is good but processing is not unlimited
Fenómeno do problema
PPS has good thermal stability (continuous use at 220°C) but this does not mean it can be processed arbitrarily.
Análise das causas
Long residence time at processing temperature still causes oxidative degradation.
Solução
Strictly control barrel time; during production reduction keep equipment at holding temperature rather than production temperature.
Conclusão principal
PPS has good thermal stability but this does not mean processing has no limits.
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