Production & Quality
6 مشاهدة
Stress cracking of PBT products (ESC)
ظاهرة المشكلة
PBT products crack after contacting oils and organic solvents.
تحليل الأسباب
PBT is sensitive to certain chemicals (such as gasoline and brake fluid) and undergoes environmental stress cracking (ESC) in the presence of stress; excessive internal stress in the product aggravates cracking.
الحل
Avoid contact with sensitive chemicals; fully anneal the product at 120°C/2h to reduce internal stress; select chemical-resistant grades.
الخلاصة الأساسية
PBT chemical resistance is limited, and environmental stress cracking requires special attention.
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