Antiblocking efficiency of mineral additives in Polyethylene film has long been associated to the performance of theparticles relative to their size, distribution, placement in the film, and optical performance. The effectiveness of theantiblock is directly related to the roughness they impart on the film while minimizing loss in optical properties.New hybrid clarity antiblocks provide the necessary roughness and optical quality required in today’s high clarityfilms when compared to alternative synthetic and natural silica.Polyethylene films containing antiblock (patented) mineral additives were characterized with the Atomic ForceMicroscope (AFM). The AFM provides quantitative surface topography data that is used to compare the roughnessand surface morphology among LLDPE films containing several types of antiblock fillers. In addition totopography, AFM images collected using TappingMode? imaging yields information about the film chemicaldifferences such as crystallinity and filler location.
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