JPH0214912B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fixing method for fixing a printed image on a printing paper.

Printing using ribbon coated with disperse dyes
As shown in FIG. 1, the ribbon R and the printing paper P are interposed between the thermal head 1 and the platen 2, and the platen 2 is rotated counterclockwise, and the ribbon R and the printing paper P are moved in the directions of arrows a and b. The disperse dye of the ribbon R is sublimated by the printing signal applied to the thermal head 1 and transferred to the printing paper P coated with the coating material C such as polyester or acetate, and the image PI is transferred onto the printing paper P. was forming.

However, since the application time of the print signal to the thermal head 1 during printing is short, ranging from several μs to several tens of ms, the disperse dye is not sufficiently diffused into the printing paper P and recrystallizes to the surface and adheres as a residual disperse dye. do. Therefore,
Disperse dyes have poor coloring properties, and the disperse dyes recrystallized on the surface of the printing paper P are likely to peel off. In addition, the printing paper P
The surface of the dye is uneven so that the disperse dye can be diffused, but there is a problem in that the color purity is reduced due to diffuse reflection caused by the uneven surface.

The present invention has been made in view of the above points, and provides a fixing method for fixing an image on the printed paper by heating and bonding the printed paper and the laminate film. The present invention will be explained below based on the drawings.

Figure 2 is a schematic diagram showing an embodiment of the present invention, Figures 3a and b are explanatory diagrams of operation, Figures 4a and b are enlarged sectional views of the printing paper and laminate film, and Figure 5 is an explanatory diagram. It is.

In FIG. 2, 11 and 12 are upper and lower guides forming an insertion opening, and 13 is a guide 15 for guiding the heater 14.
16 is a cam, 17 is a pressing piece 17a pressed by the cam 16, and a stopper piece 17b protruding from the hole 12a of the lower guide 12.
A stopper 18 is provided with the stopper piece 17b.
19 is the upper guide; 20 is an aluminum heater roller having an internal heat source and whose surface is coated with Teflon (trade name); 21 is the heater roller 20;
Backup rollers 22 and 23 made of silicone rubber mixed with alumina powder that rotate while being pressed against the roller reflect the heat of the heater roller 20 in the direction of the heater roller 20 and the backup roller 21, and
The lower reflector 24 is a peeling piece whose other end is brought into contact with the back-up roller 21 by a weight 25 provided at one end, and 26 is a lower guide serving as a discharge port.

In Fig. 4, P is a printing paper coated and impregnated with coating material C such as polyester or acetate that diffuses dyes, F is a laminate film provided with a thermosetting adhesive layer A, and laminate film F and Adhesive layer A allows dye to diffuse,
It remains colorless or white and transparent even when heated.

The adhesion of the laminate film F to the printing paper P and the diffusion of the dye will be explained with reference to FIGS. 1 to 5.

As shown in FIG. 1, the printed surface of the printed paper P is brought into contact with the adhesive layer A, and the laminate film F is stacked on top of the other, and then inserted into the insertion opening of the fixing device in the state shown in FIG. The printing paper P and the laminate film F are guided by the upper and lower guides 11 and 12 to the stopper piece 17b.
I run into it. In this state, the arm 13 rotates counterclockwise as shown in FIG.
4 is pressed against the lower guide 12, and the printing paper P and laminate film F are heated and bonded together with the adhesive layer A. Then, as shown in FIG. 3b, rotate the arm 13 clockwise to return the heater 14 to its original position, rotate the cam 16 1/4 turn, and then
The stopper piece 17b is positioned below the lower guide 12 by the urging force. This completes the adhesion of the printing paper P and the leading end of the laminate film F. By bonding the tip portions in this manner, both can be transported as one to the next process.

From the state shown in FIG. 3b, the printing paper P and the laminate film F are conveyed by an appropriate method between the heater roller 20 and the back-up roller 21. Since the heater roller 20 is rotating counterclockwise, the back-up roller 21 The printing paper P and the laminate film F are heated, pressurized, and conveyed. During this heating, as shown in FIG. 5, the printing paper P and the laminate film F are adhered by the adhesive layer A, and the residual disperse dye recrystallized on the printing paper P is transferred to the coating material C, the adhesive layer A, and the laminate film. Diffusion to F. The heating temperature differs depending on the material used to diffuse the disperse dye, but as an example, if the heating temperature is higher than the glass transition temperature of coating material C, adhesive layer A, and laminate film F, the disperse dye will diffuse into coating material C, adhesive layer A, and laminate film F. and diffused into laminate film F. Furthermore, if a chelating agent is mixed into the laminate film F, the hue can be controlled, and if an ultraviolet absorber is mixed, fading can be prevented.

In this way, apply the laminating film F to the printing paper P.
By adhering , the color development, density and color purity of the disperse dye that forms the image PI on the printing paper P improves,
The surface becomes flat and diffused reflection can be prevented.

In the process of adhering the printing paper P and the laminate film F, when the printing paper P comes into pressure contact with the back-up roller 21 and rolls together, the peeling piece 24, which is pressed against the back-up roller 21 with the weight 25, Thus, the paper P to be printed can be peeled off from the back up roller 21, thereby preventing it from being wrapped around the back up roller 21.

When the series of strokes is completed, the cam 16 rotates 1/4 turn to project the stopper piece 17b onto the lower guide 12 in preparation for the next operation.

As explained above, in the fixing method of the present invention, the adhesive layer and the laminate film are heat-treated at a temperature higher than the glass transition temperature, so that the laminate film is adhered to the printing paper and diffused reflection can be prevented. Furthermore, the dye remaining on the printing paper is vaporized by the heating process and diffused into the coating material, adhesive layer and laminate film, which has the advantage of improving color development, density and color purity.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a printing device, Fig. 2 is a schematic diagram showing an embodiment of the present invention, Figs. 3 a and b are explanatory diagrams of operation, and Figs. The enlarged sectional view and FIG. 5 are explanatory views. In the figure, 20 is a heater roller, 21 is a back-up roller, P is a printing paper, C is a coating material,
F is a laminate film, and A is an adhesive layer.

Claims (1)

[Claims] 1. A printing paper that has been transfer printed by heating and sublimating a disperse dye and a laminate film provided with a thermosetting adhesive layer are stacked, and the stacked printing paper and laminate film are bonded to the adhesive layer and the laminate film. By heating and pressurizing the laminate film at a temperature equal to or higher than the glass transition point temperature, the laminate film is fixed to the surface of the printing paper, and the residual disperse dye transferred to the printing paper is transferred to the printing paper, and a fixing method, characterized in that the adhesive is diffused into the laminate film from the adhesive layer.