Molding Process
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HDPE product low-temperature brittle cracking
Problem Phenomenon
HDPE products crack when used in winter.
Cause Analysis
HDPE has high crystallinity and reduced low-temperature toughness; notch-sensitive, sharp corners easily crack at low temperature.
Solution
①Select high-impact grades for low-temperature applications; ②eliminate sharp corners in the structure; ③conduct low-temperature drop verification; ④avoid large deformation assembly at low temperature.
Key Takeaway
Low-temperature applications: grade selection + rounded corners as double insurance.
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