Research on PP film tape spinning and forming process
Three types of polypropylene(PP)film tape with different cross sectional shapes were prepared by changing the shape of die and post processing technology.The cooling water temperature,stretching temperature,stretching ratio and other parameters in different size were studied to figure out how to affect the mechanical properties of PP film tape monofilaments.The results showed that the breaking strength of PP film tape filament was the greatest when the cooling water temperature was around 30℃,stretching temperature was 130℃and stretching ratio was around 7.0.At the same condition,the breaking strength of membrane rupture filament by cutting the film was greater than that of the PP flat filament extruded by the square die and circular die,and the breaking strength of film tape squeezed by circle die was the least.When the heat setting temperature was controlled in 150℃,PP film tape had the maximum breaking strength.
film tapepolypropylene monofilamentsmechanical properties
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