Material Analysis
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ASA outdoor yellowing beyond expectation
Fenómeno do problema
ASA outdoor products show yellowing and fading after one or two years of use, shorter than expected weathering life, with yellowing more obvious on light-colored parts.
Análise das causas
ASA has excellent weathering resistance but does not never age; strong ultraviolet, high temperature and high humidity synergistically accelerate photo-oxidation; when the pigment system weathering grade does not match, color deteriorates first; differences in radiation due to product orientation cause uneven aging.
Solução
①Select high weathering grade grades and matched color powder systems; ②evaluate radiation dose differences according to installation orientation; ③regular appearance inspections and establish replacement standards; ④accelerated aging data guides life expectation management.
Conclusão principal
ASA weathering is a significant advantage relative to ABS, not absolute immunity; the color system and resin weathering must be matched in design; life expectation should be based on accelerated aging data rather than feeling.
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