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Thermal transfer sheet
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A technology of thermal transfer sheets and thermoplastic resins, applied in printing, printing devices, copying/marking methods, etc., capable of solving problems such as insufficient heat resistance and instability
Active Publication Date: 2007-10-10
DAI NIPPON PRINTING CO LTD
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Problems solved by technology
The undercoat layer described in Patent Document 6 has problems in that it has insufficient heat resistance because it has an organic chain derived from the above-mentioned copolymer, and it is easily hydrolyzed and unstable because it uses the above-mentioned inorganic main chain.
In addition, regarding silicate, Patent Document 6 only cites silicon as a Group IVb metal without any more specific description, and there is no description at all of mixing silicate with other oxides.
Method used
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Embodiment 1
[0176] On a polyethylene terephthalate [PET] film with a thickness of 4.5 μm as a base material, the substrate layer coating solution 1 of the following composition is coated by the gravure coating method so that the dry coating amount is 0.06 g / m 2 , to form a substrate layer after drying.
[0177] Utilize the gravure coating method to coat the dye layer coating solution of the following composition on the top of this base layer, make the dry coating amount be 0.7g / m 2 , formed a dye layer after drying, and made the thermal transfer sheet of Example 1.
[0178] In addition, on the surface of the other side of the above-mentioned substrate, a heat-resistant slippery layer was formed in advance in such a manner that a heat-resistant slippery layer coating liquid having the following composition was coated by a gravure coating method so that the dry coating amount was 1.0g / m 2 , forms a heat-resistant slippery layer after drying.
[0196] The thermal transfer sheet of Example 2 was produced in the same manner as in Example 1 except that the substrate layer in the thermal transfer sheet produced in Example 1 was changed to the following composition.
[0203] The thermal transfer sheet of Example 3 was produced in the same manner as in Example 1, except that the substrate layer in the thermal transfer sheet produced in Example 1 was changed to the following composition.
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Abstract
This invention provides thermal transfer sheets that have excellent strength of adhesion between a dye layer and a base material, have high reflection density, have good releasability from an image receiving sheet at the time of printing even after storage under high temperature and high humidity conditions, can produce thermally transferred images with high sharpness and can produce satisfactory prints. Specifically, there are provided a thermal transfer sheet characterized in that an undercoating layer formed of a thermoplastic resin and colloidal inorganic pigment ultrafine particles and a dye layer are provided in that order on one side of a base material, and a thermal transfer sheet characterized in that an undercoating layer formed of colloidal inorganic pigment ultrafine particles and silicate or aluminum alcoholate, and a dye layer are provided in that order on one side of a base material.
Description
technical field [0001] The present invention relates to a thermal transfer sheet, which forms a substrate layer and a dye layer sequentially on the surface of one side of a base material; , printing) high transfer sensitivity, especially high-density printing can be obtained. Background technique [0002] As a method of forming an image by thermal transfer, there is known a thermal diffusion type transfer method (sublimation type thermal transfer method) in which a thermal transfer sheet and a thermal transfer image sheet are superimposed on each other to form a full-color image. The thermal transfer sheet carries a thermal diffusion dye (sublimation dye) as a recording material on a substrate sheet such as a plastic film, and the thermal transfer image sheet is provided with the above-mentioned dye on another substrate such as paper or plastic film. Dye-receiving layer. Because this method uses heat-diffusing dyes as colorants, the density and grayscale can be adjusted fr...
Claims
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Application Information
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