PURPOSE: To obtain a film superior in mold release properties, process stability and aging in a quality, by a method wherein a layer obtained through a mixed body of a swellable, inorganic layer silicate, water-soluble resin or water dispersible resin and water-soluble oil or water-dispersible oil whose weight ratio is specific is provided on the surface of a plastic film.
CONSTITUTION: A film for mold release is manufactured by a method wherein fine particle piece dispersion base in a non-agglomerated state is made by dispersing swellable, inorganic layer silicate (a) in water or in a water souble organic solvent, with which water-soluble resin or water-dispersible resin (b) and water-soluble or water-dispersible oil (c) are added and mixed up each other, and an obtained dispersion solution is applied onto at least one surface of a plastic film. Water, alcohol or their mixture are preferable as a solvent. In this case, a weight ratio (a/b) between the (a) and (b) is made 1/103W2/1, and mixing is performed by making a weight ratio (a/c) between the (a) and (c) and a weight ratio (c/b) between the (c) and (b) respectively 1/20W50/1 and 1/100W5/1.
TSUNASHIMA KENJI
MIMURA TAKASHI
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