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Most polyolefins exhibit a degree of ‘tackiness’ which cannot readily be processed into packaging films without the presence of special additives. Many current polyolefin film formulations contain fatty acid amides (slip agents) and inorganic materials (antiblock agents) to reduce friction...
Control of the sequential orientation (tenter) process for optical films is one of the most important factors in developing the retardation films which are needed for large sized liquid crystal displays (LCD). Analysis to predict the thickness distributions and bowing phenomenon during the...
Plastics have become a major factor in modern life and the massive volume of plastics in use has a significant effect on the environment. Major efforts are underway to reduce the impact of plastics on the environment and to make them more eco-friendly. Such efforts include the use of...
In film casting, a polymer melt is extruded through a flat die before rapid cooling on a chill roll. In this article, the effects of process conditions on polypropylene (PP) film formation in the air gap have been studied. Process variables investigated include draw ratio (DR) and die...
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