Extrusion & Post
6 مشاهدة
Sharkskin on the surface of PET extruded pipes
ظاهرة المشكلة
Regular sharkskin-like rough texture appears on the surface of PET extruded pipes, with a rough hand feel.
تحليل الأسباب
Excessive extrusion speed causes melt fracture; die head temperature is on the low side and skin viscosity is high; the die head inner wall is rough.
الحل
Reduce extrusion speed or increase die head temperature; reduce melt viscosity (appropriately increase temperature); polish the die head inner wall.
الخلاصة الأساسية
PET pipe sharkskin is a typical manifestation of melt fracture.
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!