Material Drying
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Mechanical properties, appearance, and dimensions change after aging
Fenómeno del problema
Mechanical properties, appearance, and dimensions change after aging
Análisis de la causa
UV exposure causes cellulose acetate butyrate yellowing and embrittlement (PA type has poor UV resistance)
Thermal-oxidative aging, molecular chain breakage, strength decrease
Cellulose acetate butyrate absorbs moisture, repeated dry-wet cycling fatigue (PA type)
Long-term contact erosion by chemical media
Stress relaxation, deformation after long-term loading
Solución
Add UV absorbers and antioxidants
Select cellulose acetate butyrate grades with high weather resistance
Control humidity changes in the use environment
Evaluate long-term compatibility with chemical media
Consider stress relaxation margin in design
Conclusión clave
Long-term aging needs to be addressed from formulation and use environment
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