Molding Process
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Large Compression Set of CMC
Problem Phenomenon
Compression set of CMC products >30%, below the 15% requirement
Cause Analysis
CMC elastic recovery is insufficient; crosslinking degree is low and plastic deformation is unrecoverable; density is low, cell walls are thin and recovery is poor
Solution
1)Increase crosslinking degree to 60-70% to reduce plastic deformation; 2)Select high elastic recovery CMC grade; 3)Add reinforcing filler
Key Takeaway
Large compression set is caused by insufficient crosslinking; increasing crosslinking degree is the key
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