Molding Process
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DSTDP surface stress whitening
Problem Phenomenon
DSTDP product surface stress whitening in stressed regions, affecting appearance and strength
Cause Analysis
Under local stress, DSTDP molecular orientation causes refractive index difference and whitening; product internal stress concentration regions
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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