Production & Quality
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Poor EAA fatigue resistance
Problem Phenomenon
EAA product fatigue life <10⁴ cycles below the 10⁵ cycle requirement
Cause Analysis
EAA elastic recovery insufficient, plastic deformation accumulating with each cycle; crosslinking degree too low, fatigue crack propagation fast
Solution
1) Increase crosslinking degree to improve recovery and reduce accumulated deformation; 2) Select high molecular weight grade to raise the fatigue threshold; 3) Product design to reduce stress concentration
Key Takeaway
Poor fatigue resistance is caused by insufficient recovery and fast crack propagation; increasing crosslinking is key
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