Molding Process
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CEF surface stress whitening
Problem Phenomenon
The surface of the stressed area of the CEF product shows stress whitening, affecting the appearance and strength
Cause Analysis
The molecular orientation of CEF under local stress causes refractive index differences and whitening; the internal stress concentration area of the product
Solution
1) Reduce the injection speed to reduce orientation stress; 2) Annealing treatment at 80°C/2h to release stress; 3) Product design to avoid stress concentration sharp corners
Key Takeaway
Stress whitening is caused by orientation and internal stress; reducing orientation and annealing are the key
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