Injection Molding
4 조회수
PETG injection molded product optical birefringence
문제 현상
Transparent products show colored stripes under polarized light (stress birefringence).
원인 분석
Uneven internal stress distribution causes refractive index anisotropy, produced by uneven filling flow and cooling.
해결 방법
Increase the mold temperature to reduce the cooling rate; anneal to eliminate stress; optimize gate position to improve flow.
핵심 요약
PETG birefringence is the optical manifestation of uneven stress.
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