| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet transperentized by sensing heat only a heated part of which is transparentized by adding resin particles reducing the opacifying properties and transparentized by heating, to the inside or coating the resin particles on the front surface and/or the back surface of a fibrous base material without carrying out a special beating treatment of a pulp or without impregnating the base material with a resin or the like. SOLUTION: The sheet transperentized by sensing the heat is obtained by adding the resin particles of waxes reducing the opacifying properties by melting when heated, and having 40-300°C melting point to the inside or coating the resin particles on the front surface and/or the back surface of the fibrous base material, and is constituted so that only the heated part may be transparentized. COPYRIGHT: (C)2005,JPO&NCIPI
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