PMMA Optical Part Birefringence

Fenómeno do problema

Rainbow patterns under polarized light.

Análise das causas

High injection speed and high holding pressure produce orientation stress.

Solução

①Low-speed injection and low holding pressure; ②High mold temperature; ③Annealing.

Conclusão principal

Rainbow patterns = stress optical image.

PMMA; birefringence; rainbow patterns; stress

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