Molding Process
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EEA Large Compression Set
Problem Phenomenon
EEA product compression set >30%, lower than the 15% requirement
Cause Analysis
EEA elastic recovery insufficient; crosslinking degree low, plastic deformation unrecoverable; density low, cell walls thin, recovery poor
Solution
1) Increase crosslinking degree to 60-70% to reduce plastic deformation; 2) Select high-elastic-recovery EEA grades; 3) Add reinforcing fillers
Key Takeaway
Large compression set is caused by insufficient crosslinking; increasing crosslinking degree is key
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