Record receiver having plural interactive leaves or a colorless – Having plural interactive leaves
Patent
1984-02-07
1988-01-26
Louie, Won H.
Record receiver having plural interactive leaves or a colorless
Having plural interactive leaves
8471, 428195, 4285375, 428913, 428914, 428413, 4284755, 4284796, 428481, 428535, 428536, B41M 526
Patent
active
047217030
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a printing paper suitable for color copying by the sublimation transfer of sublimation dye.
BACKGROUND ART
It is possible that an ink made by dispersing or dissolving a sublimation dye into a resinous liquid is coated and dried on a paper to form a dye carrier ribbon, this dye carrier ribbon is heated on its back surface by a thermal print head to sublimate the dye contained in the ink, and the dye then is transferred to a suitably surface treated printing paper which is suitably to be superposed to the dye carrier paper, whereby a color copy can be obtained. In this case, since in general a temperature of the thermal print head reaches 200.degree. C. or above, a resin in the dye carrier ribbon (hereinafter referred to as a binder) and a resin which is coated in the surface treating layer of the printing paper are both softened by heat and then adhered to each other by melt. To avoid this, the binder and the coating resin are cross-linked so as to have a heat resisting property. This, however, could not achieve satisfactory effect.
As the resin used in a coating composition which is coated on the surface of the printing paper, there is used a thermo-plastic resin, for example, saturated linear polyester resin, epoxy resin and the like which can excellently adsorb and diffuse a sublimation dye.
Since these resins are melted or softened inherently by heat generated from a thermal print head and the sublimated dye is effectively transferred and diffused on that portion so as to be colored, these resins are apt to be adhered by melt with the binder contained in the dye carrier ribbon. To solve this problem, it has been done to improve the heat resisting property of the coating resin by cross-linking made by addition reaction using isocyanate group and the like, or cross-linking made by condensation reaction using melamine resin or the like. This could not provide a satisfactory heat resisting property so that the adherence by melt could not be avoided. On the other hand, a coating layer having excellent heat resisting property was provided by the cross-linking using the amine-series curing agent of epoxy resin. This coating layer could not be prevented from being adhered by melt with the dye carrier ribbon.
DISCLOSURE OF INVENTION
The present invention relates to a printing paper which can solve these problems and which can not only keep effective transferring and coloring property of the sublimation dye but also prevent the dye carrier ribbon from being adhered by melt with the printing paper perfectly.
Namely, the present invention relates to a printing paper made by coating and hardening on the surface of a paper a coating composition which contains a resin adsorbing a sublimation dye excellently and a compound partially substituting the resin which compound having more than two radically polymerizable unsaturated double bonds in one molecule. Without lowering the coloring property by the transfer of the sublimation dye, the sublimation transfer system color copying printing paper of the present invention can effectively prevent the dye carrier ribbon from being adhered by melt therewith so that the dye can be transferred sufficiently with satisfactory coloring property.
More in detail, the sublimation transfer system color hard copying printing paper of the present invention is formed such that a composition material consisting of 20 to 98 parts by weight of thermo-plastic resin having a transferring property to a dispersing dye and 80 to 2 parts by weight of a compound having more than 2 radically polymerizable unsaturated double bonds in one molecule is formed on the surface of a base material and this composition material is cross-linked.
BEST MODE FOR CARRYING OUT THE INVENTION
It is considered that a coating resin used in the present invention can effectively achieve a satisfactory cross-linking to thereby improve the heat resisting property, without losing satisfactory transferring property of a thermo-plastic resin suitable for the transfer
REFERENCES:
patent: Re28789 (1976-04-01), Chang
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patent: 4091122 (1978-05-01), Davis et al.
patent: 4097230 (1978-06-01), Sandhu
patent: 4117198 (1978-09-01), Power et al.
patent: 4237185 (1980-12-01), Lombardi et al.
patent: 4288479 (1981-09-01), Brack
patent: 4316952 (1982-02-01), Wendling
patent: 4388387 (1983-06-01), Tsuboi
patent: 4505975 (1985-03-01), Majima
Abe Tetsuya
Fujiwara Yoshio
Kobayashi Naotake
Louie Won H.
Sony Corporation
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