Abstract
The film coated by tabular inorganic filler with water-soluble resin is known as a gas barrier film for the food packaging. The gas barrier of the film rises when the aspect ratio of filler is higher. Sodium Tetrasilisic mica particle has a high aspect ratio. When the coated film was observed by SEM, high aspect ratio particles of Sodium Tetrasilisic mica were arranged to parallel for surface.