JPH03151268A - Heat transfer recording method - Google Patents

Abstract

PURPOSE:To make it possible to obtain a transfer with an excellent printing grade even after many times of transfers are performed while stabilizing cohesive failure by generating a slippage between a heat transfer recording material and recording paper by a method wherein transfer is performed in such a manner that the transfer length of a heat transfer recording material becomes shorter than the transfer length on a recording paper. CONSTITUTION:Carrying of a recording paper 31 in the Fp direction is performed by rotating a platen 22 in the (a) direction. At this time, by controlling a force to feed the recording paper 31, Fp; a force to take up a heat transfer recording material, Fr; and a force to pull the heat transfer material, Fb; the relative feeding quantity is changed. The carrying speed for the heat transfer recording material is made slower than that of the recording paper 31. Transfer is performed in such a manner that the transfer length of the heat transfer material becomes shorter than the transfer length on the recording paper. Thus, by generating a slippage between the heat transfer material and the recording paper 31 at the time of transfer, cohesive failure is stabilized, and a transfer with an excellent printing grade, even after many times of transfers are performed, becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a thermal transfer recording method for recording characters or visual images on recording paper using a thermal transfer recording material capable of multiple transfers and a thermal transfer recording device.

[Prior Art] In recent years, thermal transfer recording methods have been developed into facsimile machines, computer terminals, and recorders because they are non-impact, noiseless, maintenance-free, low-cost, can be made smaller and lighter, and can be printed in color. Used in many fields such as;i'i
, ``What is the thermal transfer recording method like 1-Iri11.-?
- The surface of the recording material is heated with Maruhatsu 1ζ, or the ink is melted and transferred onto the transfer paper by heating the current-carrying head 1': current-carrying heat-generating resistive layer, and printing is performed by [i]. The structure of the thermal transfer recording material used includes a base material,
It consists of a heat-resistant layer that protects the base material from the heat of the thermal head and a heat-melting ink. .

However, in general thermal transfer recording materials, when the ink layer is transferred once, the ink layer in that area is transferred onto the recording paper, making it impossible to transfer the same area multiple times. Therefore, such one-time type thermal transfer recording materials are extremely uneconomical.

Therefore, JP-A-56-89984 and JP-A-57-366
By providing an intermediate layer mainly composed of a resin on a base material to strengthen the adhesion with the ink layer as seen in 98Ji5 and others, and providing a heat-melting ink layer with a small cohesive force thereon, A technique has been devised that allows the ink shoe to be used multiple times by sequentially causing cohesive failure from the surface. A thermal transfer recording method in which this thermal transfer recording material is used to transfer images to a recording paper at a relative speed of 1:1 has been common.

1 RM and Objectives to be Solved by the Invention 1 However, even if the thermal transfer recording material described above is used for multiple transfers, it is difficult to control the coagulation rod breakage and the print quality deteriorates as the number of transfers increases. had.

Therefore, the present invention was made in order to solve the above-mentioned problems, and its purpose is to provide a recording method that can transfer images with excellent print quality using a thermal transfer recording material that can be used many times. It is about providing.

1 Measures for Solving the Problem 8J As a means for solving the above nM, the thermal transfer recording method of the present invention includes a thermal transfer recording method in which a thermal transfer recording material capable of multiple transfers is used to transfer onto a recording paper. It is characterized in that the transfer is performed so that the transfer length of the recording material is shorter than the transfer length on the recording paper.

That is, the present invention provides a transfer method that stabilizes cohesive failure by generating misalignment between the thermal transfer recording material and the recording paper during transfer, and allows transfer with excellent print quality even after multiple transfers.

1 Example 1 Examples of the present invention will be described in detail below, but the present invention is not limited thereto.

FIG. 1 shows a structural diagram of a thermal transfer recording device and a thermal transfer recording material, and the thermal transfer recording method of the present invention will be explained.

First, as the base material 11 of the thermal transfer recording material, any known film or paper can be used as is, for example, a polyethylene/nterephthalate film with a thickness of about 6 μm is used.Next, the ink layer 13 A coloring material, a resin component, and a wax are dispersed and mixed as components and coated on a base material to form an ink layer.

y, base material 1 so that the ink layer is stable and prone to cohesive failure.
1 and the ink layer 13 6 Further, on the base material 11 on the opposite side from the ink layer 13, a heat-resistant Jl 11 is provided to prevent sticking due to the mulchette 21.
4 was established. Note that the thermal transfer recording material uses ink N13 during transfer.
We use a type that undergoes cohesive failure and is sequentially peeled off from the surface.

This thermal transfer recording material and recording paper 31 are transferred to a thermal head 21.
The ink layer 13 is melted by pressing and heating the thermal transfer recording material placed between the platen 22 and the thermal head 21, and the ink layer 13 is transferred onto the recording paper 31. Furthermore, recording paper 3
The conveyance in the Fp force direction of 1 can be performed by rotating the platen 22 in the direction a in the figure by a drive means (not shown). At this time, by setting the force for feeding the recording paper 31 (denoted as Fp), the force for winding up the thermal transfer recording material (denoted as Fr), and the force for pulling the thermal transfer recording material (denoted as Fb) to l1i111, the recording paper 31 and the thermal transfer recording material The relative feed amount can be changed. That is, while the conveyance speed of the recording paper 31 is constant, the conveyance speed of the thermal transfer recording material is made slower than the conveyance speed of the recording paper 31 by controlling Fr and Fb.

Thermal transfer recording device, thermal transfer recording material and description II under the following conditions
! Using paper, Example 1-3E as shown in the table below! The transfer test of Comparative Example 1 was conducted.

Thermal head Number of recording electrodes 1728 Main R@Pitch Q, 125 Thermal transfer recording material Base material thickness 6μ Intermediate layer thickness 2 It Ink layer thickness 12μ Heat-resistant layer thickness 0. 1μ Platen hardness 60 degrees Recording speed Approx. 12cm/sec Recording pitch 125μ Recording paper
General high-quality paper surface Transfer test conditions The results of the transfer density on the recording paper obtained in the above transfer test are shown in FIG. As shown in the figure, although the transfer density slightly decreased as the number of rotations increased, by generating misalignment between the thermal transfer recording materials and the recording paper, the decrease in density was reduced and the print quality was improved.

[Effect of the Invention 1] As explained above, the present invention reduces the distance between the thermal transfer recording material and the recording paper during transfer by transferring the thermal transfer recording material so that the transfer length is shorter than the transfer length on the recording paper. This has the effect of stabilizing cohesive failure and making it possible to obtain transfer with excellent print quality even after multiple transfers.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the principle of thermal transfer recording. Figure 2 shows
1 is a graph obtained from an example of the present invention and a conventional thermal transfer recording method. 11... Base material 12... Intermediate layer 13... Ink layer 14... Heat-resistant protective layer 21... Thermal head 22... Platen 31... Recording paper or more

Claims (1)

[Claims] A thermal transfer recording method in which a thermal transfer recording material capable of multiple transfers is used to transfer onto a recording paper, the thermal transfer recording method being characterized in that the transfer is performed so that the transfer length of the thermal transfer recording material is shorter than the transfer length on the recording paper. .