POROUS THIN PAPER FOR ORIGINAL PAPER FOR HEAT-SENSITIVE STENCILE PRINTING AND PREPARATION THEREOF

摘要

PURPOSE: To obtain the title thin paper with neither white drop-out on the solid image part nor setoff by a method wherein a paper is made of a fiber wherein a polyvinyl acetal synthetic fiber being swellable and dissolvable in hot water is a main ingredient and it is brought into a specified water content and adhesion between fibers is formed within a specified thickness from the surface of one side by bringing the one surface into contact with a heating body. ;CONSTITUTION: A fiber wherein a polyvinyl acetal synthetic fiber with a thickness of at most 2.0 denier and a length of 2-10mm and being swelled or dissolved with hot water of at least 80°C is a main ingredient is made into a paper by means of a paper-manufacturing machine 2. Then, water content is controlled to 50-80wt.% by means of a press roll 3 and adhesion between fibers is formed within 65% from the surface of one side by heating it for a short time at 80°C or higher by means of a heating drum. A thermoplastic resin film with a thickness of at least 4μm is laminated on the side of the porous thin paper wherein there exists no adhesion between fibers. As the result, the title thin paper with high printing durability, less white drop-out on solid image parts and less setoff and good imaging properties can be obtd.;COPYRIGHT: (C)1993,JPO&Japio