Processing Machinery
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PA6 Outdoor UV Aging
Fenómeno do problema
Outdoor PA6 parts show surface chalking and whitening and brittle fracture after one or two years, with natural-colored material being especially severe
Análise das causas
Ultraviolet rays trigger photo-oxidative breakage of PA6 molecular chains, with surface chalking gradually extending inward; natural-colored material without a stabilization system has a very short outdoor life; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solução
①For outdoor parts, select carbon black filled black grades or add UV stabilizers; ②for long-term exposure scenarios, evaluate switching to weather-resistant materials such as ASA; ③regular appearance inspection and early replacement
Conclusão principal
PA6's UV intolerance is a molecular nature; carbon black is the most economical and effective protection, and material replacement should be considered for high-requirement scenarios; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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