Molding Process
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MP large compression set
Problem Phenomenon
MP product compression set >30%, below the 15% requirement
Cause Analysis
MP elastic recovery insufficient; crosslinking degree low, plastic deformation unrecoverable; density low, cell walls thin, poor recovery
Solution
1) increase crosslinking degree to 60-70% to reduce plastic deformation; 2) select a high elastic recovery MP grade; 3) add reinforcing filler
Key Takeaway
large compression set is caused by insufficient crosslinking; increasing crosslinking degree is key
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