Extrusion & Post
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CEF internal delamination cracking
Problem Phenomenon
The CEF product delaminates internally and cracks along the interface
Cause Analysis
The interface adhesion between CEF and incompatible fillers or blending components is poor; the cooling shrinkage difference causes interlayer stress
Solution
1) Use a compatibilizer to improve the interface adhesion; 2) Uniform cooling to reduce interlayer stress; 3) Reduce the amount of incompatible components added
Key Takeaway
Internal delamination is caused by poor interface and shrinkage differences; compatibilizer and uniform cooling are the key
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