Electrophotography – Image formation – Transfer
Patent
1997-07-16
1998-06-23
Brase, Sandra L.
Electrophotography
Image formation
Transfer
399342, 399390, 428914, 503227, G03G 1516, G03G 1520
Patent
active
057714312
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention generally relates to an image-receiving sheet for sublimation thermal transfer recording, and a method for producing the sheet.
More particularly, the invention relates to a thermal transfer image-receiving sheet for sublimation thermal transfer recording, and to a white, powdery coating composition suitable for use for forming the dye-receiving layer in such an image-receiving sheet for sublimation thermal transfer recording. The dye-receiving layer is hereinafter simply referred to as a receiving layer.
In particular, the invention relates to an image-receiving sheet for sublimation thermal transfer recording, which comprises a base sheet, preferably common paper, and a single receiving layer with good releasability and in which high-density transfer images can be formed on the layer, and also relates to a white, powdery coating composition for the image-receiving sheet and a method for producing the coating composition.
Further, the invention relates to a method for producing such an image-receiving sheet for sublimation thermal transfer recording, which comprises applying a white, powdery coating composition onto a base-sheet, preferably common paper, to thereby form a receiving layer partially or wholly thereon. More particularly, the invention relates to a simple and inexpensive method for producing such an image-receiving sheet for sublimation thermal transfer recording, on which sheet can be formed high-quality transfer images through thermal transfer recording.
BACKGROUND ART
For electrophotographic image formation, a method is known for forming multi-color images which comprises selectively exposing a photoreceptor through an original image via a color separator capable of separating the original image into predetermined primary colors, thereby forming a latent image on the photoreceptor, followed by developing the latent image into a visible image corresponding to the primary color with transferring the thus developed visible image on an image-receiving sheet one after another to give a multi-color image on the sheet. For example, with successively transferring the developed visible images of three colors of yellow, magenta and cyan, so-called full-color transfer image duplications can be formed on common paper. This system is a multi-color image-forming system using a so-called dye-transferring full-color printer.
To such full-color duplication, popularly applied is sublimation thermal transfer recording, for which, for example, employed is a thermal transfer recording system comprising preparing a thermal transfer sheet that has a sublimable dye layer as formed on a suitable support, such as a polyethylene terephthalate film (this sheet is generally referred to as an ink sheet or an ink file in the art, and will be hereinafter referred to as the former, ink sheet), while, on the other hand, separately preparing a thermal transfer image-receiving sheet having on its surface a receiving layer capable of receiving the sublimed dyes, thereafter laying the ink sheet onto the image-receiving sheet in such a manner that the surface of the dye layer of the former faces the surface of the receiving layer of the latter, then heating the ink sheet with a heating means such as a thermal head in accordance with image information to be transferred onto the image-receiving sheet to thereby thermally transfer the dyes from the ink sheet onto the receiving layer of the image-receiving sheet in accordance with the image information.
The conventional thermal transfer image-receiving sheet for such sublimation thermal transfer recording is generally produced through wet-coating of a plurality of resin layers on a base, such as common paper, synthetic paper, or suitable synthetic resin sheets, for example, in such a manner that a receiving layer made of resins to which the dyes existing on an ink sheet can be diffused or transferred under heat, and a release layer made of resins which acts to prevent the thermal fusion between the receiving layer and the ink sheet are lami
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Arai Toshio
Matsui Fumio
Mitsuhata Takanori
Bando Chemical Industries Ltd.
Brase Sandra L.
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