Processing Machinery
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PP Outdoor Weather Resistance Modification
Problem Phenomenon
【Problem Phenomenon】PP outdoor products need weather resistance, pure PP is insufficient
Cause Analysis
PP modified with HALS/carbon black/UV absorbers improves weather resistance; outdoor furniture, geotechnical materials, and agricultural products use 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 modified PP for outdoor parts; carbon black grades have the best weather resistance but are black; select the stabilization system according to service years; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PP outdoors relies on weather-resistant modification, carbon black and HALS are the main force; 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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