JPS61164892A - Image-receiving material for transfer-type thermal recording - Google Patents

Abstract

PURPOSE:To provide an image-receiving layer which gives clear and stable images through efficient adsorption of a dye sublimed with less energy, development of color, and fixation of the images, by a construction wherein the second dyeable layer with a porous structure is provided on a base, and the first dyeable layer comprising a dyeable high molecular weight substance is provided thereon. CONSTITUTION:The base 1 is a synthetic paper, an ordinary paper, a coated paper or a transparent film, which has an excellent surface smoothness. The second dyeable layer 2 has a porous structure, and can be provided by applying a solution of a resin such as an AS resin and an ABS resin in a solvent comprising a solvent having a low boiling point of 50-100 deg.C. When a plasticizer is added to the resin, a further effect is obtained in providing the porous structure. An addition of a fine inorganic powder of a metallic oxide such as SiO2, TiO2 and CaCO3 or the like to the resin accelerate the formation of the porous structure and imparts heat resistance to the layer 2. The second dyeable layer 3 is a thin layer with a thickness of 1-3mum comprising a dyeable high molecular weight substance, which is a polyester, a polyamide, an acylic resin, an acetate resin or the like.

Description

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Conventional technology Transfer type thermal recording is attracting attention as it provides full-color hardcopy, which is close to color photography.
It is one. In this type of recording, when a sublimable dye is used as a coloring material for the transfer sheet, the surface of the image receptor is dyed to absorb the sublimable dye that sublimates from the transfer sheet in response to the image signal and develop color. There are layers. Especially in the case of sublimable disperse dyes, JP-A-57-107885
, JP-A-58-148794 has proposed an image receptor provided with a dyed layer of saturated polyester resin or saturated polyester resin containing finely powdered silica or the like. On the other hand, the inventors proposed an image receptor provided with a dyeing layer containing a dyeable polymeric substance and a polymeric substance incompatible therewith, as shown in Japanese Patent Application No. 68-230811.

Problems to be Solved by the Invention The image receptor having the dyed layer as described above is insufficient for efficiently adsorbing dye, developing and fixing the dye with a small amount of recording energy.

The present invention solves these problems by efficiently adsorbing sublimated dye with less recording energy.
The purpose of the present invention is to provide an image receptor that develops and fixes color to give a clear and stable image.

Means for Solving the Problems In order to solve the above problems, the present invention provides a second dyeing layer having a porous structure on a base material, and contains a dyeable polymeric substance thereon. A first dyed layer is formed.

Function: With the above-described structure, the dye sublimated from the transfer sheet by the applied recording energy is adsorbed to the thin first dyed layer and diffused into the second dyed layer having a porous structure. Penetrates deeper into the interior through capillary action. Therefore, color can be efficiently developed with less recording energy, and since the dye penetrates deeply into the interior, an image with high color density, clarity, and stability can be obtained.

Embodiment The basic structure of the image receptor of the present invention is shown in FIG. 1 is a base material, and synthetic paper, plain paper, coated paper, or a transparent film with excellent surface smoothness, such as polypropylene or polyester, is used. 2 is a second dyeing layer having a porous structure as shown by 5. This porous material is human S resin,
Resins such as MuBS resin, polyester, polyvinyl chloride, polyvinyl acetate, polystyrene, polypropylene, polyethylene, acrylic resin, acetate resin, etc.
This can be achieved by dissolving it in a solvent containing a low boiling point solvent at 0°C and applying it. Adding various plasticizers to the above resin is effective in making the resin more porous.

As the plasticizer, esters such as phthalic acid, phosphoric acid, and glycolic acid, and rubber-based plasticizers are used. For example, 5i02
By including inorganic fine particles such as various metal oxides such as , TiO2, OaCO5, etc., porosity can be promoted and heat resistance can also be imparted.

3 is a first dyeing layer, which is a thin layer containing a dyeable polymer substance and having a thickness of 1 to 3 μm.

As the dyeable polymer substance, polyester, polyamide, acrylic resin, acetate resin, etc. are used.

FIG. 2 shows another embodiment in which the first dyeing layer contains, in addition to the dyeable polymeric material, a polymeric material that is incompatible with this, or contains particulate material shown in 4. The structure is such that the dye adhered to the surface can easily diffuse into the interior by incorporating it into a fine network structure. Examples of incompatible polymer substances include polyethylene,
Hydrocarbon resins such as polypropylene, polystyrene, polyvinyl chloride, polyvinyl acetate, 5BFt, fluororesins, silicone resins, etc. are used. In addition, as particulate materials, silica, alumina, titanium oxide, talc, calcium carbonate, molypide/disulfide, lead oxide, etc. with a particle size of 100
Inorganic fine particles of deer, organic fine particles of fluorinated hydrocarbons such as fluorinated carbon and Teflon, etc. are used.

The first dyeing layer may contain an ultraviolet absorber, an antioxidant, a centering agent, and the like.

In the above explanation, examples were mainly given using sublimable (dispersed) dyes, but the present invention can also be applied to cases where a melt transfer type transfer sheet is used.

Effects of the Invention As described above, the image receptor of the present invention has excellent color density, sharpness, and stability because it adsorbs dye well and diffuses it to the inside of the dyed layer with less recording energy in the transfer type thermal recording method. gives an excellent image.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of one embodiment of the image receptor of the present invention, and FIG.
The figure is a schematic cross-sectional view of another embodiment. 1... Base material, 2... Second dyed layer, 3...
...First dyed layer, 4...Particulate matter.

Claims (4)

[Claims] (1) An image receptor for transfer type thermal recording, in which a second dye layer having a porous structure is provided on a base material, and a first dye layer containing a dyeable polymer substance is formed thereon. (2) The image receptor for transfer type thermal recording according to claim 1, wherein the second dyed layer contains a resin and inorganic fine particles. (3) The image receptor for transfer type thermosensitive recording according to claim 1, wherein the first dyeing layer contains a polymeric substance incompatible with the dyeable polymeric substance and has a fine network structure. (4) The image receptor for transfer type thermal recording according to claim 1 or 2, wherein the first dyeing layer contains a granular material and has a fine network structure.