Extrusion & Post
6 مشاهدة
Excessive polyolefin plastomer POP blending ratio causes film stickiness (Variant: strengthened measures)
ظاهرة المشكلة
When the blending ratio of POP and PE is too high, the film surface becomes sticky and the winding sticks, affecting opening and subsequent processing.
The higher the POP content, the more prominent the problem.
Especially on the original basis, additional attention is needed, and this problem is more prominent and requires key attention.
تحليل الأسباب
(1) POP has high octene content, material soft, surface tack large
(2) POP addition ratio exceeds 30%, surface sticky
(3) Slip agent and antiblock agent added insufficiently
(4) Winding temperature too high or winding tension too large
(5) Cooling insufficient, film temperature high at winding
(6) On the original basis, additional attention is needed: process parameter fluctuations or equipment state changes aggravate this problem
الحل
(1) Control POP addition ratio within 10-30%
(2) Add sufficient slip agent (0.2-0.5%) and antiblock agent (0.1-0.3%)
(3) Fully cool the film, winding temperature not exceeding 35°C
(4) Appropriately reduce winding tension
(5) Select POP grades with higher density (density ≥0.885g/cm³)
(6) And strengthen process monitoring; on the original basis, additional attention is needed, paying special attention to parameter stability
الخلاصة الأساسية
POP blending stickiness needs to be solved by controlling the ratio, adding additives and optimizing winding conditions.
Targeted preventive measures need to be taken in different production scenarios.
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