JPS58208093A - Heat transfer ink sheet - Google Patents

Abstract

PURPOSE:To conserve required energy, by using synthetic resin having a filler good in heat conductivity uniformly dispersed therein as an ink sheet base. CONSTITUTION:An ink 2 is applied onto a film like ink sheet base 8 wherein a filler good in heat conductivity is uniformly dispersed in synthetic resin. Said ink sheet 8 is obtained, for example, by a method wherein carbon black is mixed in polyester resin as the filler to prepare a mixture which is in turn melted to be formed into a film. Therefore, as compared to a conventional ink sheet base comprising only polyester resin, heat conductivity is remarkably increased. In addition, as the filler 7, other than carbon black as a nonmetal, a fine powder comprising iron, copper or Al as a metal is used.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-transfer ink sheet for use in a heat-transfer printing device.

As shown in Figure 1, which explains the principle of thermal transfer printing, the ink sheet of this post is made of a film-like ink sheet base 1 made of polyester and having a thickness of 10 μW.
The ink on the top was stolen by two ovens, each several micrometers thick. In the same figure, the heater 5 in the optical path of the thermal head 4 is shown at '26(,).
When heat is generated by a human input signal to printing #c, the heat is transferred from point A on the contact area between heater 5 and ink sheet base 1 to contact point F between ink sheet base 1 and ink 2! ! [! if
The heat is transmitted to point B on j, and to point 0 on the contact part of ink 2 and printing press J3, and ink 2 is melted by this heat.
Printed? ! Transfer is completed by fusing layer at step 3.

However, in this method, the heat of the ink 2 is generated from the heater 5 via the ink sheet base 1, so in the case of a piggyback ink sheet for thermal transfer, the heater 5
Most of the heat generated by the ink sheet base 1 is consumed by increasing the temperature of the ink sheet base 1, which is inefficient, and it is necessary to supply energy several times the amount of heat needed to melt the ink 2 to the heater 5. I rarely scored.

Not only is this a waste of energy, but it also limits printing speed. That is, in order to increase the printing speed and shorten the heating time of the heater 5, it is necessary to
I have to offer my strength, and this has a similar effect on Kotobuki of Heater 5. In addition, since the temperature of the mermaid is extremely high, the ink sheet base 1 made of synthetic resin becomes soft and staining is likely to occur. For this reason, a large force can be applied to the cutting edge, and this is what limits the speed.

Ink sheet base 1 is one solution to the above problem.
It is conceivable to reduce the thickness of the ink sheet in order to reduce the amount of thermoelectricity involved, but there are limits to this in terms of the strength of the ink sheet and the ease with which it can be handled.

The present invention has been developed with an eye to the intermixing point of qw rice, and has been developed to provide a flexible ink sheet base that has significantly better heat transfer properties than the conventional ink sheet base (4) for thermal transfer. P when using heat transfer printing
It is an object of the present invention to provide an ink sheet for thermal transfer that has extremely low yre energy and shrinks.

@2 Figure is an example of an ink sheet for thermal transfer that would be uninvented ν
This is shown in the T-bladder diagram ν). Figure 2 shows the inside of Sosei Kobo 6.
The ink 2 is shown disposed on a film-like ink sheet base 8 on which a heat transferable filler 7 is uniformly coated. This kind of ink sheet base is made by mixing carbon black as filler 7 in polyester resin and melting it to form a film, which is significantly different from conventional ink sheet bases made only of polyester resin. It has increased thermal conductivity. For the filler 7, fine powders of metals such as iron, copper, and aluminum are used in addition to carbon black as a nonmetal.

Next, an example of a simulation conducted to examine the effect of increasing the thermal conductivity of the ink sheet base will be described based on FIG.

Figure 3 uses a one-dimensional heat conduction model. was determined by calculation.

The third place is a conventional ink sheet (A, I: l).

The degree of 0 points is indicated by nal, bl, and C1, respectively, and $
Figure 3 IBI g 1 book@machi thermal transfer ink sheet is shown with a2 and b2.02 curved axes in 1 company.
1μ'' Both take a warm vertical position and take time for +v4@. However, Fig. 3 IBI assumes that the ink sheet base of the thermal transfer ink sheet according to the present invention has a thermal conductivity 10 times that of the conventional one, and the power applied to the heater, etc. The conditions are the same as in the third position.

In Fig. 3, the difference between the curves a1 and bl'j6 is below tax+b due to the ink sheet base φ.

Compared to the third position, in Figure 3 (B), the difference in mellowness between the two is smaller, and while the conventional ink sheet base 1 consumes a large amount of heat, the ink of the present invention In the sheet base 8, the heat of the heater is efficiently transferred to the ink 2.The 19+ time t2 at IBI in Figure 3 is 1/ compared to P)r4i4μ11 at the third position.
2 or less, the printing time may be shortened 71+). The temperature of the helium at that time is T1 in Figure 31, and n in Figure 3 (Bi), but the temperature of the ink sheet base is 1 (lower temperature). This means that the front part of the heater will last longer and the occurrence of sticking will be reduced, which is a major 9YJ coming.

Furthermore, although not shown in the figure, the results of tt calculations assuming printing using a thermal transfer ink sheet made by an uninvented company and with the absorption time set at 1° show that the applied power is approximately equal to the conditions of the three apparatuses. It has been confirmed that it is sufficient to print with 1/2 or less.

In this way, this ink sheet for thermal transfer can efficiently transmit the heat of the heater to the ink, reducing energy loss, so it is possible to significantly reduce the PJR energy during heat transfer printing. Therefore, it is possible to increase the printing speed by up to 9 violets of power consumption on the side floor, and it is also possible to increase the printing speed to a low level when increasing the printing speed is not essential.
1. It became possible to print by force. The benefits include miniaturization of the monument device and longer moxibustion life of the heater.

[Brief explanation of the drawing]

Figure 1 shows the principle behind the thermal transfer ink sheet, Figure 4 and Figure 2 are explanatory diagrams showing one implementation of the inventive heat transfer ink sheet, and Figure 3 shows the placement of the heat transfer ink sheet. FIG. 2 is an explanatory diagram of calculation results of temperature rise. 1 and 8--ink sheet base, 2-Φ ink, 3... stamped yuzu 1-an, 4... thermal head, 5... heater, 6--O combination, m fat, 7
...filler. N11 people with special liver disease ToM Choki-Kisa Co., Ltd. 1 6 7 8

Claims (1)

[Claims] In an ink sheet in which an ink is applied to a film-like ink sheet base made of a synthetic resin, the ink sheet base is characterized by using -8-containing resin in which a thermally conductive and attractive filler is uniformly dispersed. Ink sheet for thermal transfer.