Molding Process
7 조회수
EMA surface stress whitening
문제 현상
Stress whitening appears on the surface of stressed areas of EMA products, affecting appearance and strength
원인 분석
Under local stress, EMA molecular orientation causes refractive index differences and whitening; areas of internal stress concentration in the product
해결 방법
1) Reduce injection speed to reduce orientation stress; 2) Annealing treatment at 80°C/2h to release stress; 3) Product design avoids stress-concentrating sharp corners
핵심 요약
Stress whitening is caused by orientation and internal stress; reducing orientation and annealing are key
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