Molding Process
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PETG transparent part optical distortion
Problem Phenomenon
When viewing objects through PETG products, distortion and deformation occur (optical distortion).
Cause Analysis
The product surface is uneven or thickness non-uniform causing uneven light refraction, internal stress causes local refractive index changes.
Solution
Optimize the flatness of the injection molded surface; uniform wall thickness; fully anneal to reduce internal stress.
Key Takeaway
PETG optical distortion is a serious defect for transparent packaging.
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