Abstract
We describe the formation of microporous coating layers using a mechanical stirring method of introducing and dispersing air bubbles in resin-containing liquids. These microporous coating layers have been characterized in terms of their surface structure and optical property. The key technology in obtaining successful microporous layers is how to control the pore size of the microporous coating layers. Therefore, in our own research program, we have made intensive studies for obtaining a lot of fine air bubbles and stabilizing them in resin-containing liquids in order to obtain a large number of fine pores on the surface of the coating layers.In the toner-based marking application, both non-printed and printed areas of the paper having microporous layer exhibit matte tone. There is little change of the gloss of the matte paper by increasing the solid fill area unlike a plain or pigment-coated paper. And print qualities and line qualities are improved and high quality picture is obtained.
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