| 摘要 |
PURPOSE:To enhance the adhesive power between a recording layer and a protective layer and to improve repetitive rewriting resistance by forming the protective layer by coating in a soln. state contg. a solvent capable of solving the high-polymer liquid crystal of the recording layer. CONSTITUTION:The recording layer of the initialized thermosensitive recording medium is heated to a proper recording set temp. of a glass transition temp. (Tg) or above by a thermal printing means, such as thermal printer. The transparent and opaque liq-crystal state is than obtd. This recording medium is cooled down to the glass transition temp. or below to immobilize the high-polymer liquid crystal in the heated part and to discriminate the heated part from a base region which is the non-heated part, by which the recording image is formed. The protective layer is formed by coating the surface of the recording layer with the protective layer coating liquid prepd. by adding proper inorg. pigments and fillers, such as wax, further to the material soln. for which the solvent capable of dissolving the high- polymer liquid crystal is used, and drying the coating in the case of provision of the protective layer on the recording layer. Then, the respective layers are mingled with each other at the boundary between the recording layer and the protective layer, by which the continuous layer is formed. The adhesive power between the recording layer and the protective layer is therefore increased. |
