Toppan Printing Co., Ltd.

Yasuo Sugishita

Godai Fukunaga

Takehito Yamato

Yoko Hirai

Akihiko Ito

Yasunori Ono

Ken Oshinomi

Makiko Nitanai

Emi Ando

The heat-sensitive transfer recording medium of the invention is such that an equilibrium moisture absorption rate at 23&#xb0; C./50% of an undercoating layer containing a water-soluble polymer as a main component is about 15% or less, preferably 13% or less, and more preferably, a mean value (&#x3b1;) of the surface roughness (root mean square deviation Sq) of the heat-resistant lubricating layer is about 0.05-0.40 &#x3bc;m, a mean value (&#x3b2;) of the surface roughness (root mean square deviation Sq) of the heat-resistant lubricating layer after being allowed to stand for 10 minutes at 150&#xb0; C. is about 0.00-0.70 &#x3bc;m, and a difference between the mean value (&#x3b1;) and the mean value (&#x3b2;) is about 0.00-0.30 &#x3bc;m.

Heat-sensitive transfer recording medium, producing method thereof and heat-sensitive transfer recording method

Provided is a heat-sensitive transfer recording medium having a base material, and an undercoating layer and a dye layer sequentially laminated and formed on the base material. The undercoating layer is formed by applying and then drying an undercoating layer-forming application liquid containing polyvinyl pyrrolidone and polyvinyl alcohol whose tensile strength measured based on JIS K 7113 is not lower than 8 kg/mm. The dye layer is formed by applying and then drying a dye layer-forming application liquid containing an anthraquinone compound as a thermal migratory dye.

Heat-sensitive transfer recording medium

There is provided a thermal transfer recording medium capable of obtaining high transfer sensitivity during high-speed printing, that is, decreasing the amount of a dye used in a dye layer; and preventing abnormal transfer during printing even after storage in a high-temperature and high-humidity environment. The thermal transfer recording medium () contains: a heat-resistant sliding layer () that is formed on one surface of a substrate (); and an undercoat layer () and a dye layer () that are sequentially laminated on the other surface of the substrate (), in which the undercoat layer () contains, as major components, a polyvinyl pyrrolidone and a polyvinyl alcohol having a crystallinity degree of 15% or higher, and the dye layer () contains an anthraquinone-based thermal transfer dye.

Thermal transfer recording medium

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Tokyo, Japan

Yasuo Sugishita