Extrusion & Post
10 مشاهدة
EVA extruded film has gel particles
ظاهرة المشكلة
Transparent gel particles of 0.1-0.5mm appear on the surface of EVA extruded film
تحليل الأسباب
High molecular weight components in EVA are not fully melted during extrusion, forming local highly crystalline regions; extrusion temperature too low or insufficient mixing
الحل
1) Increase extrusion temperature by 5-10°C to ensure full melting; 2) Increase the length of the screw mixing section; 3) Inspect raw material to ensure consistent grade; 4) Replace with a finer 120-mesh screen to intercept unmelted particles
الخلاصة الأساسية
Gel particles are caused by insufficient melting; increasing temperature and mixing are key
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