JPH02178091A - Thermal transfer recording medium - Google Patents

Abstract

PURPOSE:To perform pluritime transfer by forming the coating layer of heat- melting ink applied to a base material from aggregate of fine cracks. CONSTITUTION:A large number of cracks are confirmed in the surface of the heat-meltable ink 101 applied to a base material 102. There is no special limit in the base material coated with the heat-meltable ink if a material subjected to a usual thermal transfer base material composed of polyethylene terephthalate, polyimide, aromatic polyamide, aliphatic polyamide, polyether sulfone, condenser paper or the like is used. No special limit is also necessary with respect to the size and shape of cracks. The cracks are controlled according to a coating condition. By this method, the passing-through of the heat- meltable ink becomes well at the time of transfer and pluritime transfer becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a thermal transfer recording medium used in a thermal transfer printer, and particularly to a heat-melting ink that can be transferred multiple times.

[Prior Art] As shown in Figure 2, conventional thermal transfer recording media have no intentionally created cracks in the coating layer, and the layer is coated with the aim of making it as uniform as possible. there were.

[Problem to be Solved by the Invention 1] However, the above-mentioned conventional technology has a problem in that it is difficult to obtain good transfer in multiple transfers.

The present invention is intended to solve these problems, and its purpose is to provide a thermal transfer recording medium that achieves good transfer even in multiple transfers by providing minute cracks in heat-melting ink. It's there to do.

[Means for Solving the Problems] The thermal transfer recording medium of the present invention is characterized in that the coating layer of the heat-melting ink consists of an aggregate of minute cracks.

[Function] According to the above-mentioned structure of the present invention, there is an effect that the hot-melt ink can be easily removed during transfer, making it possible to perform multiple transfers.

[Examples] The present invention will be explained in detail below using Examples and Comparative Examples.

An example is shown in FIG. 1, and FIG. 1 fa) shows the surface state of a hot melt ink lot coated on a base material 1O2. 1st
Reference numeral 111 in Figure (b) is an enlarged view of the main part of the heat-melting ink 1O1. From No. 111, many minute cracks are observed in the hot-melt ink.

Reference numeral 112 is an enlarged view of the base material 102, showing the base material to which the hot-melt ink is applied. The base material in the present invention is made of polyethylene terephthalate, polyimide, aromatic polyamide, aliphatic polyamide, etc. There are no special restrictions as long as the material is made of polyamide, polyether sulfone, capacitor paper, etc. that can be used as a normal thermal transfer base material, and there are no special restrictions on the size or shape of cracks.

Next, as a comparative example, a surface coated with a conventional heat-melting ink is shown in FIG. 2. In FIG. 2(a), 201 is the heat-melting ink and 202 is the base material. In addition, 21 shown in FIG. 2(b)
1.212. are the heat-melting ink 201 and the base material 2, respectively.
02 is an enlarged view of the main parts. There are no cracks on 211 like there were on 111.

Table 1 shows the composition of the hot melt ink used in the present invention.

In addition, in the present invention, thermal transfer recording media coated with cracked hot-melt ink having the same composition are described as examples.
A recording medium without this was used as a comparative example. Of course, since the present invention relates to the state of the coating layer, it is not limited to the composition shown in Table 1. The presence or absence of cracks was controlled by the coating conditions.

Table 2 shows changes in reflection density during multiple full solid transfers. In Example-1, the OD for one transfer is stable at 1.7.5 for five transfers, whereas in Comparative Example-1, most of the transfer is performed in the first and second transfers. End, 3
After that, it is no longer possible to transcribe.

Table 3 is a visual evaluation of transfer quality. In most of the examples, low print quality is not recognized.

Table 1 (Effects of the Invention) As described above, according to the present invention, the thermal transfer is characterized in that the coating layer of the heat-melting ink coated on the base material is composed of an aggregate of minute cracks. The recording medium has the effect of allowing multiple transfers.

Solid content/triene; l/9 Table 2 n=5 average Table 3

[Brief explanation of the drawing]

FIG. 1(a) is an embodiment of the present invention and is a schematic diagram of a heat-melting ink 101 coated on a base material 102. FIG. 1(b) is also an enlarged view of the main part of FIG. 1(a). FIGS. 2(a) and 2(b) are diagrams showing comparative examples, and are schematic diagrams of coating surfaces of conventional heat-melting ink, 201 is the heat-melting ink, 202 is the base material, and 211 and 212 are respectively 2
Enlarged view of the main parts of 01,202. E: excellent G: Good
P: Poor transfer paper: Mitsubishi Paper Mills TTR Applicant Seiko Epson Co., Ltd. Agent Patent attorney Kizobe Suzuki (and 1 other person) b)

Claims (1)

[Claims] (1) A thermal transfer recording medium characterized in that the coating layer of heat-melting ink consists of an aggregate of minute cracks.