Production & Quality
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PPSU product internal stress cracking
Problem Phenomenon
PPSU products stress crack during use or sterilization.
Cause Analysis
PPSU has high modulus, generates internal stress during processing and is relatively sensitive to stress cracking, especially in sterilization environments.
Solution
Increase mold temperature to 160-180°C; anneal at 200-220°C/1-2h.
Key Takeaway
PPSU internal stress control is a long-term reliability requirement.
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