Molding Process
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POE surface stress whitening
Problem Phenomenon
POE product stressed area surface stress whitening, affecting appearance and strength
Cause Analysis
POE under local stress, molecular orientation causes refractive index difference and whitening; product internal stress concentration areas
Solution
1) Reduce injection speed to reduce orientation stress; 2) Annealing treatment 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 key
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