Processing Machinery
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Antioxidant aging of PP products
Fenómeno do problema
PP products used outdoors powder and become brittle.
Análise das causas
PP has poor weather resistance, and ultraviolet rays break the molecular chains; aging accelerates when the antioxidant and light stabilization systems are insufficient.; during on-site investigation, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solução
①Select anti-UV stabilized grades; ②add carbon black or light stabilizers; ③control the processing heat history; ④perform aging test verification.; after adjustment, continuously sample and verify the effect, and resume mass production after confirming stability
Conclusão principal
PP outdoor applications must be equipped with a stabilization system; protecting the molecular weight at the processing end is the foundation.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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