Processing Machinery
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Antioxidant aging of PP products
Problem Phenomenon
PP products used outdoors powder and become brittle.
Cause Analysis
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
Solution
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
Key Takeaway
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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