Extrusion & Post
6 مشاهدة
HDPE film gel (fisheye)
ظاهرة المشكلة
HDPE blown film has gel spots and fisheyes, and the film surface of high-strength shopping bags is defective.
تحليل الأسباب
Unplasticized particles, degraded crosslinked material or impurities; HDPE has high molecular weight and is difficult to plasticize, and gel is more obvious when the screen is insufficient.
الحل
①Increase plasticization temperature and mixing (barrier screw + mixing section); ②densify the screen; ③clean the dead corners of the head; ④control regrind quality.
الخلاصة الأساسية
Plasticization of high molecular weight material is the foundation of gel prevention and control.
هل كان هذا مفيدًا؟
0 شخص وجدوا هذا مفيدًا
شكرًا لك على ملاحظاتك!