Processing Machinery
5 مشاهدة
POM product chemical resistance decline
ظاهرة المشكلة
Products swell and crack after contacting fuel or solvents; the material itself has qualified chemical resistance but the processed parts fail.
تحليل الأسباب
Processing internal stress makes chemical media more likely to invade, triggering environmental stress cracking; degradation also lowers molecular weight, weakening the material's inherent chemical resistance.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
الحل
①Reduce internal stress (high mold temperature, low holding pressure); ②control processing thermal history; ③avoid sharp corner stress concentration design; ④perform compatibility verification according to the actual medium.
الخلاصة الأساسية
Chemical resistance failure is often related to the superposition of internal stress; mild processing technology and fillet design can maximize retention of POM's chemical resistance advantages.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!