Molding Process
6 مشاهدة
LDPE Film Longitudinal Splitting (Splitty)
ظاهرة المشكلة
The film tears very easily along the longitudinal direction, and TD strength is low.
تحليل الأسباب
Too small blow-up ratio and too large draw ratio cause excessive longitudinal molecular orientation; improper frost line height also aggravates it.
الحل
①Increase the blow-up ratio; ②reduce the draw ratio; ③optimize frost line height; ④select grades with wider molecular weight distribution.
الخلاصة الأساسية
Longitudinal splitting = orientation imbalance; adjust the blow-up ratio.
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