Production & Quality
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PETG product toughness decline at low temperature
Problem Phenomenon
In use environments below 0°C, the impact strength of PETG products decreases significantly and they become brittle.
Cause Analysis
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.
Solution
Design the product to avoid notches and sharp corners; increase mold temperature to reduce internal stress; use toughened modified grades if necessary.
Key Takeaway
PETG low-temperature toughness is better than PET, but product design and internal stress management still need attention.
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