JPS58155994A - Heat transfer sheet for heat transfer recording apparatus - Google Patents

Abstract

PURPOSE:To prevent the adhesion defects and the thickness irregularity of an ink layer, by coating on recesses formed on the ink coating side on a base sheet with resin or roughening the surface of said base sheet. CONSTITUTION:An endless base sheet 1 comprising a polyester film or a polyimide film is recirculated and conveyed by conveyor rollers 2, 3 while a heat meltable ink 5 in a heated ink tank is pumped up by a heated roller 6 to coat the base sheet 1 with said ink to form an ink layer 7. This heat transfer sheet is conveyed to a heat sensitive head 8 to carry out the transfer recording of the ink with respect to an object 9 to be recorded such as plain paper separately supplied to said heat sensitive head 8. An intermediate layer comprising resin is provided to the surface of the ink layer coating side of the base sheet or one surface of the base sheet is roughened and the ink layer is applied to the intermediate layer or the roughened surface side to prevent the fluidization of the ink layer of the heat transfer sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thermal transfer sheet used in a thermal transfer recording device in which a heat-melting ink is applied to a heat-resistant paste sheet in the form of a dress, and the ink layer is transferred to a recording medium by a thermal head. It is related to.

The conventional thermal recording method is a thermal recording method in which a recording layer that develops color with heat is placed on a base paper, a heating resistor is provided on a thermal recording paper, and a thermal head is pressed to form a layer on the recording layer. Compared to other methods, the thermal transfer recording method has the advantage of not being able to resist printing on plain paper when it gets hot. In the thermal transfer recording method, a coloring material such as carbo black or dye is mixed with the photoreceptor shown in step 1 so that it becomes liquid or fluid (by heating with O2, such as wax), and a heat-fusible colorant that is solid at room temperature is used. A polyester film, a two-dimensional film, and a paper type base sheet of 10 mK are coated in advance using a hot melt method, etc., and then a 9-heat transfer sheet is used.
O-shito Oi/! The ink layer is brought into close contact with the body to be recorded, such as plain paper, and the ink layer is liquefied and transferred to the recording medium to infiltrate the image by applying heat-sensitive heat. It is O. ζ
The thick sheet has an ink layer other than the one image area after the use of -1 and can be discarded and collected as needed.

Attempts have also been made to regenerate the ink layer using a kama device. For this purpose, an endless base sheet 1 such as a positive ester film or a polyimide film 5 is conveyed by conveying rollers 1 and 2 in the direction indicated by the arrow 4, for example, and is heated and placed in a tank. Heat meltable I/RI S of heat roller 6
This thermal transfer sheet is conveyed and transferred to a recording medium 9 such as plain paper, which is separately fed by a thermal head 80 and is then transferred and recorded. is to be done. 12 is a tension rod for winding the recording medium, and 13 is a gm-7 for applying tension to the recording medium 9.
-114 is a rubber low two that is pressed against the head. Therefore, in this case, the consumables are used as the recording medium instead of the image. Only 9 useful pieces of information are transcribed, and none of them are wasted. The above-mentioned coating layer 7 is naturally cooled when the endless thermal transfer sheet is conveyed, becomes a solid, and is sent to the end of the thermal head, where it is recorded at the mouth of the thermal head. corresponds to picture II (there is no I/D layer in the 9th part), and is reproduced in the painted part.

However, the conventional configuration has the following drawbacks. In other words, if the adhesion force of the heat-decomposable ink to the base sheet 1 at the coating part is m-, the coating may leak or the ink layer may peel off during conveyance of the thermal transfer sheet. This is a flaw to discuss. The 1st sheet of 0 heat transfer after the 9th grade sickle has an exposed -ks portion of the 9th base sheet corresponding to the image area, and an unrecorded ink layer portion other than the image area, and is directly transferred to the coating area. When ink is applied to the 0th part of the 9th corner being transported, uneven adhesion of inks and rims, uneven thickness, etc. are likely to occur. To avoid this uneven adhesion, the 171 layer is heated directly as it is transported to the coating section in a round shape, and the 171 layer is rubbed off with a round blade or the like. However, this would complicate the configuration of the device. Further, the thermal transfer sheet is conveyed to the coating section, where it is naturally cooled and rolled up to room temperature, and then heated to a temperature sufficiently higher than the melting point or softening point of the layer to be coated in its own field, that is, the base. From the viewpoint of the heat resistance of the sheet T, if the heat resistance is 1 kIA, then the transport speed of the thermal transfer sheet is II! If this occurs, or if there is less liquid ink on the thermal transfer sheet compared to its conveyance speed, the amount of liquid ink present on the thermal transfer sheet may be less than that of the thermal transfer sheet.
The adhesive tends to solidify, making it difficult to obtain sufficient adhesion to the thermal transfer sheet. For this solution.

The temperature of the thermal transfer sheet being conveyed to the application section is maintained at a level that does not fluidize the layer, and the thermal transfer sheet is preheated just before the application section, or the surface of the roller 2 is heated to preheat the sheet. It is also possible that you are overheating. However, this also requires a complicated device configuration.

From the above points, the present invention improves the adhesion of the Y/R layer to the base sheet during the coating process in the device and the subsequent sheet conveyance, and reduces coating leakage and the thickness of the Y/R layer. Mura, I/
To provide a thermal transfer recording cap that realizes recycled coating without peeling of the coating layer, and does not require manual steps such as scraping off the coating layer or preheating the sheet immediately before coating. It is something to do.

In other words, this paste sheet is an improved version of the endless base sheet, and has an intermediate layer made of K such as resin on the side of the paste sheet on which the I/layer is applied. It is characterized in that one side is rough and an ink layer is applied to the intermediate layer or the rough side.

Below, the present @O embodiment will be explained in detail based on the drawings.

The structure of the thermal transfer stamping device is the same as that shown in FIG.

The structure of the coating part may be the pumping method using the roller 6 shown in Fig. 1, or alternatively, a liquid heat-fusible material may be used between the base sheet and the heated Cl-2-. 4IL <, 9i/! It may be constructed so that nine slit-shaped O holes or bt-shaped ink provided on the side wall of the paddle are supplied onto the base sheet and applied.

Figures II and 5iii show an example of the processed/dressed O base sheet 0sXa used in the present invention, which is coated on the sheet in a layer-7 or 27t-device, and is one of the thermal transfer sheets. t showing a cross section.

JllE! Sono has established a precedent for using an etres-like O-base sheet as having an intermediate layer 10 such as V-vinylbutytool Jumaryu on an O-sheet 11 such as a polyester film or a polyelectrolyte film. K11l on this middle layer 1・O
An ink layer 17 is formed in the internal coating section. 1. For the intermediate layer 100# material, a material that has adhesive properties to the sheet 11 and the ink layer 17 is selected.

Figure 1 is an example in which one side of the same film as the sheet 11 is roughened by the Glazmaet/G method and bound to the base sheet 97-121. Further, in the present invention, a synthetic paper made so that one side is roughened to form a backing may be used as the base sheet.

In any of the above cases, even when recording is performed with the thermal head 8 of the thermal transfer recording device, the ink layer 17 or 27 does not peel off from the interface with the base sheet, but due to the splitting of the ink layer within the ink layer itself. The Y/R on the surface of the Y/R layer can be transferred to the recording medium. This is related to the thermal melting ic O drag strength of the solid state.

Thermal transfer sheet 7, which is made up of nine base sheets and has an interlayer, passes through the thermal head I after death and receives the heat from the thermal head I. The surface adheres to the recording medium 9, such as plain paper, and is cooled and solidified in good condition. In this state, the thermal transfer plate 7 and the recording medium 9 are separated, and the image processing department's Y/R is the recording medium! transcribed into. Therefore, the splitting of lI in the I/I layer is determined by the correlation between the tensile strength of the heat-melting ink O in the solid state and the adhesion force between the I/I layer and the base sheet and the recording medium. be done. The heat-melting inter-component increases the tensile strength! ! Since it can be done at 1, it is set at 4 so that splitting occurs within the ink layer itself.

Therefore, the recorded object! The thermal transfer sheet separated from the
! Layer Of! , ms, although there is a difference in thickness between Miki Brass SOX,
Since the gold painting has an ink layer, afIm
The heat-melting resin that is heated and coated in a TK2 shape is bonded to form a K11L shape that blocks the surface of the OI/R layer on the KI [heat transfer Nv-] layer. And, it is possible to repaint the I/I layer with 0 sheets @O with the above configuration and use an endless base sheet with h-cm and Ki-brass-) Ie
As a result, we were able to obtain a nice stormy image, and the measurement part, which was conventionally considered to be an O fine point, was Oyy! There is no layer O adhesion leakage or thickness unevenness, and the I/O layer does not peel off even during transportation.

4ailli [Okahaya Denmu] The length of 1m is Peng @Gunl! ―Stomachotomy■ shows an example of the device.

1 and 1 are partial cross-sectional views of a thermal transfer sheet formed by forming an ink layer on a textured/dressed base sheet, which is applied to the present invention. Base sheet 7, 17.27 is an ink layer.

Claims (2)

[Claims] (1) Heat-resistant ratio Apply heat-melting I/RI to the base sheet,
A thermal transfer sheet for a thermal transfer recording device in which the ink is transferred to a recording medium by a thermal head, characterized in that the ink path cloth -〇m on the pace sheet is coated with a resin or roughened. . (2) A thermal transfer sheet for a thermal transfer recording device according to claim 7, wherein the pace sheet is made of synthetic paper.