Printed matter – Having revealable concealed information – fraud preventer or... – Having plastic laminate
Patent
1992-06-08
1993-09-14
Rosenbaum, Mark
Printed matter
Having revealable concealed information, fraud preventer or...
Having plastic laminate
283 75, 283112, 283904, 8471, 503227, 428195, 428914, B42D 1502, B41M 526, B41M 5035
Patent
active
052442349
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a recording material, more particularly to an image receiving medium made of a polyvinyl chloride which can form easily and sharply a complicated image such as a picture of a face, and the like, to be formed on an ID card according to a heat transfer system.
BACKGROUND ART
In the prior art, many cards such as identification certificates, driving licenses, membership cards, etc. have been used, and on these cards is recorded various information for clarifying identification, and the like, of the owner. Particularly, on ID cards, and the like, a face photograph is the most important feature.
A classical method for imparting face photographs on to various cards is a method of securing a face photograph to a predetermined portion of a card substrate by use of an adhesive, but this method is very cumbersome in its operation, and also has the drawback that unevenness is created on the card surface.
Whereas, in the prior art, there has been developed an image forming method according to the sublimation transfer method. The sublimation transfer method is a method in which a sublimation transfer sheet, having a layer containing a dye which is sublimation transferred by heat on the surface of a substrate film and an image receiving sheet are superposed, and a desired image is formed on the image receiving sheet by heating with a thermal head according to an image information from the back of the sublimation transfer sheet, and there is the advantage that it can be practiced by a simple heat transfer printer.
Whereas, when the sublimation transfer system is applied to a card medium such as an ID card, the card substrate is demanded to have sufficient dyeability for a sublimable dye. However, most of the card substrates of the prior art have no sufficient dyeability for sublimable dyes, and therefore no image formation can be effected thereon as such. As the method for solving such drawback, a method of previously forming an image receiving layer excellent in dyeability for a sublimable dye may be conceivable, but formation of such image receiving layer on a card substrate is cumbersome in steps, whereby there is the problem of increasing the production cost of the card substrate. Further, when an image receiving layer is provided separately on the surface of a card substrate, there will ensue such problems that the card substrate may be curled or the image receiving layer may be peeled off as caused by the heat applied during image formation.
DISCLOSURE OF THE INVENTION
The present invention has been accomplished in view of the problems of the prior art as described above, and its object is to provide an image receiving medium which is not required to provide separately an image receiving layer on a card substrate, can effect image formation of a face photograph according to the heat transfer system sharply and quickly, and yet generates no curls which otherwise tend to be caused by heat transfer printing.
For accomplishing the object as mentioned above, the image receiving medium is an image receiving medium to be used in combination with a heat transfer sheet, characterized in that the image receiving medium comprises a laminate of at least one polyvinyl chloride resin sheets, and at least a layer of the image receiving medium superposed on the heat transfer sheet which receives the dye from the heat transfer sheet comprises a polyvinyl chloride resin composition containing 0.1 to 10 parts by weight of a plasticizer based on 100 parts by weight of the polyvinyl chloride resin.
The image receiving medium of the present invention uses a polyvinyl chloride vinyl resin as the main agent, and yet a plasticizer is incorporated in the main agent and its amount contained is made to be controlled strictly, and therefore an image receiving medium excellent in both image forming characteristic and image quality is obtained also without requiring separate formation of an image receiving layer.
Particularly, in the present invention, by making the structure of the image receiving
REFERENCES:
patent: 3582439 (1971-06-01), Thomas
patent: 3930924 (1976-01-01), Oka et al.
patent: 4133926 (1979-01-01), Vorrier et al.
patent: 4395434 (1983-07-01), Imada et al.
patent: 4402887 (1983-09-01), Kuriyama et al.
patent: 4519632 (1985-05-01), Parkinson et al.
patent: 4626256 (1986-12-01), Kawasaki et al.
patent: 4720480 (1988-01-01), Ito et al.
patent: 4738949 (1988-04-01), Sethi et al.
patent: 4837200 (1989-06-01), Kondo et al.
patent: 4853365 (1989-08-01), Jongewaard et al.
patent: 4869941 (1989-09-01), Ohki
patent: 4889749 (1989-12-01), Ohashi et al.
patent: 4916007 (1990-04-01), Manning et al.
patent: 4923848 (1990-05-01), Akada et al.
patent: 4985397 (1991-01-01), Uemura et al.
patent: 5095001 (1992-03-01), Miles et al.
Ando Jitsuhiko
Fujimura Hideo
Oshima Katsuyuki
Dai Nippon Insatsu Kabushiki Kaisha
Hughes S. Thomas
Rosenbaum Mark
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