Processing Machinery
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PA6 UV Chalking
Fenómeno del problema
After one year of outdoor use, PA6 products show surface whitening, chalking and strength decline
Análisis de la causa
UV rays cause photo-oxidative scission of PA6 molecular chains, and the surface layer degrades and chalks; natural-color material without an anti-UV system has insufficient outdoor weatherability; during on-site troubleshooting, verify item by item according to this mechanism, avoiding blind machine adjustment based only on experience
Solución
Select carbon black filled or anti-UV additive grades for outdoor products; apply surface coating protection for light-colored outdoor parts; periodically replace load-bearing outdoor parts; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Outdoor applications must solve UV protection, and carbon black is the most economical and effective anti-UV means; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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