Material Analysis
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HDPE anti-UV modification
Fenómeno del problema
Outdoor HDPE products chalk and embrittle on the surface after two years, especially natural color material
Análisis de la causa
HDPE has poor UV resistance, and natural color material without stabilizers rapidly photo-oxidatively degrades outdoors; carbon black is the most effective UV shielding agent, and black parts have significantly better weather resistance than natural color
Solución
①Select carbon black filled black grades for outdoor parts; ②add UV stabilizers to natural color outdoor parts; ③perform aging verification for long-term exposure scenarios; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Carbon black is the most economical weather-resistant solution for HDPE; natural color material for outdoor applications must have a UV stabilization system; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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