Production & Quality
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PETG product toughness decline at low temperature
Fenómeno del problema
In use environments below 0°C, the impact strength of PETG products decreases significantly and they become brittle.
Análisis de la causa
At low temperature, the movement of PETG molecular chain segments is restricted and there is a low-temperature embrittlement tendency; internal stress in the product aggravates low-temperature brittleness.
Solución
Design the product to avoid notches and sharp corners; increase mold temperature to reduce internal stress; use toughened modified grades if necessary.
Conclusión clave
PETG low-temperature toughness is better than PET, but product design and internal stress management still need attention.
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