Processing Machinery
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PP Weathering Aging
Problem Phenomenon
【Problem Phenomenon】PP outdoor parts powder and crack, insufficient weather resistance
Cause Analysis
PP has poor UV resistance and is prone to photo-oxidation and chalking; outdoor applications must add UV stabilizers or select weather-resistant grades; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
Select weather-resistant grades for outdoor parts (with HALS/carbon black); xenon lamp aging verification; avoid long-term exposure without protection; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PP fears UV, outdoor parts must add stabilizers or weather-resistant grades; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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