Production & Quality
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MP stress cracking
Problem Phenomenon
MP products crack in <100h under stress + chemicals
Cause Analysis
under stress, MP molecular chains are accelerated attacked by chemicals; environmental stress cracking is a typical failure mode of polyolefins
Solution
1) reduce product internal stress by annealing; 2) select high molecular weight MP to improve ESC resistance; 3) avoid contact with aggressive chemicals
Key Takeaway
stress cracking is caused by stress-accelerated chemical attack; annealing and high MW are key
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