Material Analysis
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PA66 UV aging protection
Problem Phenomenon
Outdoor PA66 parts are powdered and whitened on the surface after two years, and natural-color material embrittlement is especially severe
Cause Analysis
UV light excites photo-oxidative fracture of PA66 molecular chains, the surface powders and expands inward; unprotected natural-color material has short outdoor life, and black parts are significantly better than natural-color parts
Solution
①Select carbon black filled black grades for outdoor parts; ②Add UV stabilizers or evaluate weather-resistant materials for long-term exposure scenarios; ③Regular appearance inspection and early replacement; after adjustment, take continuous samples to verify the effect, confirm stability before resuming mass production
Key Takeaway
Carbon black is the most economical and effective UV protection for PA66; material substitution should be evaluated at the material selection stage for high-requirement outdoor scenarios; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence
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