Extrusion & Post
6 مشاهدة
Metallocene linear low density polyethylene film blocking/poor opening（Variant: Seasonal Change Scenario）
ظاهرة المشكلة
The film layers stick together and are difficult to separate, affecting subsequent processing and use.
Poor opening is particularly prominent in film winding and automatic packaging, reducing production efficiency.In particular, when the environment changes during seasonal alternation, this problem is more prominent and requires key attention.
تحليل الأسباب
（1） Metallocene linear low density polyethylene film has high surface tension and large interlayer adhesion\
（2） Film wound up at too high temperature, cooling insufficient\
（3） Winding tension too large\
（4） Lack of anti-blocking agent\
（5） Film thickness too thin, more prone to blocking\
（6） When the environment changes during seasonal alternation, process parameter fluctuations or equipment status changes aggravate this problem
الحل
（1） Add an appropriate amount of anti-blocking agent （such as silica fine powder 0.1-0.5%）\
（2） Ensure the film is fully cooled before winding, winding temperature not exceeding 40°C\
（3） Appropriately reduce winding tension\
（4） Add an appropriate amount of slip agent （such as oleamide 0.1-0.3%） to reduce surface friction\
（5） Control film thickness within a reasonable range\
（6） And adjust parameters according to the environment, paying special attention to parameter stability when the environment changes during seasonal alternation
الخلاصة الأساسية
Film blocking is caused by surface tension and temperature, and needs to be solved by adding anti-blocking agents and controlling winding conditions.Targeted preventive measures need to be taken in different production scenarios.
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