Material Analysis
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Modified cellulose acetate butyrate weather resistance not up to standard
Problem Phenomenon
Modified cellulose acetate butyrate weather resistance not up to standard, yellowing, embrittlement, or significant performance decline after outdoor use
Cause Analysis
No UV absorber added or addition amount insufficient
Antioxidant system incomplete
Poor compatibility between UV absorber and cellulose acetate butyrate
Antioxidant consumed and degraded during processing
Unreasonable formulation design
Solution
Add an appropriate amount of UV absorber (0.2-0.5%)
Improve the antioxidant system, primary/secondary antioxidant combination
Select UV absorbers with good compatibility
Avoid high-temperature degradation of antioxidants during processing
Optimize formulation design
Key Takeaway
Weather resistance needs to be addressed from UV absorbers and antioxidants
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