JPH0777831B2 - Dye transfer body - Google Patents

Description

TECHNICAL FIELD The present invention relates to a dye transfer body for thermal transfer multi-time recording by a relative speed method using a sublimable dye.

Conventional technology As a method of realizing multiple recording in thermal transfer recording,
"Recording method using a thermal transfer ink film" (JP-A-59)
No. 129196) has been proposed. This recording method is
As shown in FIG. 6, a porous network structure 1 is provided on the substrate,
The traveling speed of the transfer body 3 impregnated with the heat-meltable ink 2 is set to V / n (n ≧ 1) smaller than the traveling speed v of the image receiving body 4, the platen 5 presses the heat, and the thermal head 6 heats it. It is applied to perform recording. As a dye transfer pair using a sublimable dye, a "dye transfer body" (JP-A-59-88981) has been proposed. As shown in FIG. 7, in this dye transfer body, a coloring material layer 9 is provided on the substrate 7 from the sublimable dye, the non-sublimable particles 8 and the binder that binds them, and the non-sublimable particles 8 are colored. The material is projected from the reference surface of the material layer, and is intended to prevent direct contact between the sublimable dye and the image receptor to obtain a good halftone image quality.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention When a conventional dye transfer material using a sublimable dye is applied to a large number of recordings of a relative speed method, the slipperiness or thermal releasability of non-sublimable particles in direct contact with an image receptor is considered. If not, it causes excessive frictional force or fusion between the dye transfer body and the image receptor, and the running speed is such that the specified relative speed cannot be fiber, or even if the specified relative speed can be maintained, the surface of the image receiver is not sublimated. There is a problem that the image is not reproducible with good image quality due to the large damage caused by the functional particles.

Means for Solving the Problems In the present invention, a color material layer comprising at least a sublimable dye, particles having a slipping property or a heat releasing property, and a binder for binding them is provided on a substrate, Having heat-releasing properties or particles having a surface covered with a layer having active or heat-releasing properties, or particles containing a liquid or a substance having active or heat-releasing properties that melts by heat inside In addition, the above problem is solved by making the color material layer protrude beyond the reference surface.

Operation In the present invention, by adopting the above-mentioned constitution, the transfer body and the image receiving body are brought into contact with each other with particles having a sliding property or a thermal releasing property as a contact point,
Since the contact points have lubricity and thermal release properties,
The fusion between the image receivers and the frictional force are alleviated.

Embodiment (Embodiment 1) An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows that a coloring material layer 12 comprising at least a sublimable dye, a slippery particle 11 having a slipping property or a heat releasing property, and a binder for binding them is provided on a substrate 10. 3 is a cross-sectional view of a dye transfer body in which the particle size of the slippery particles 11 is larger than the thickness from the substrate to the reference surface 13 of the color material layer, the dye transfer body protruding from the reference surface 13 of the color material layer 12. FIG.

The slippery particles 11 in this embodiment have an average particle size of 7 μm.
Ethylene tetrafluoride particles were used.

The color material layer 12 is composed of a sublimable dye and a binder. As the sublimable dye, a magenta dye having the following structural formula was used.

The binder having the composition shown in Table 1 was used.

Ethylene tetrafluoride particles together with 4 parts by weight of polysulfone and 2 parts by weight of sublimable dye were dissolved and dispersed in monochlorobenzene, and after mixing with the binder shown in Table 1, about 0.3 g / m ² (film thickness about 1 μm) Was coated with a wire bar on the surface of a base material 10 made of a polyimide film having a thickness of 6 μm, dried with hot air, and then cured with a high pressure mercury lamp.

In the conventional example, an alumina abrasive having an average particle size of 3 μm was used in place of the ethylene tetrafluoride particles of this example.

In order to clarify the effect of this example, a dye transfer body containing no slippery particles was prepared as Comparative Example 1 and the characteristics were compared.

(Example 2) Instead of the tetrafluoroethylene particles of Example 1, an average particle size of 4.7
Carbon fluoride particles of μm were used.

(Example 3) As shown in FIG.
Is a case where molybdenum disulfide particles having an average particle diameter of 0.4 μm are used as the particles, and the particle diameter of the slippery particles is smaller than the thickness up to the color layer material reference surface 13, but there are slippery particles on the surface.

Example 4 FIG. 3 is a cross-sectional view of the slippery particles I used in this example.

In the figure, 14 is a glass bead having an average particle size of 5 μm, on the surface of which 10 parts by weight of an epoxy resin (Epicoat 828, Shell Chemical Co., Ltd.), 1 part by weight of a curing agent triethylenetetramine, and a polyoxyalkylene silicone polymer are used. (L
-7500, Nippon Unicar Co., Ltd. 0.5 part by weight, silica (AE
ROSILR972 (manufactured by Nippon Aerosil Co., Ltd.) 3 parts by weight and 100 parts by weight of methyl ethyl ketone were sufficiently dispersed, and then the slipping layer 15 was coated with a fluidized coating device to a film thickness of about 1 μm.

The cross section of the dye transfer body using the above-mentioned slippery particles is the same as in Example 1.

Example 5 FIG. 4 is a cross-sectional view of the slippery particles II used in this example.

The slippery particles are made of melamine resin (Sumitex Resin M
-3, Sumitomo Chemical Co., Ltd. 20 parts by weight, curing agent (Sumitex Accelerator ACX, Sumitomo Chemical Co., Ltd.) 2 parts by weight, silicone oil (L-45, Nippon Unicar Co., Ltd.)
1 part by weight and 40 parts by weight of water were thoroughly mixed with a high-speed stirrer, and then granulated into a spherical shape with a spray dryer.
Cured in a constant temperature bath at 120 ° C for 2 hours and then classified to an average particle size of about 7
The liquid silicone oil 16 has a thickness of μm.

The cross section of the dye transfer body using the above-mentioned slippery particles is the same as in Example 1.

The composition of the slippery particles of Examples 1 to 5, Conventional Example and Comparative Example 1 is summarized in Table 2.

The image receptor used for recording with respect to the dye transfer body is a polypropylene-based white pigment layer-coated synthetic paper, the first layer of which is an aqueous polyester resin (Vylonal MD1200 Toyobo Co., Ltd. 15 parts by weight, water 30 parts by weight). Part of the coating solution with a wire bar to a thickness of about 5 μm, and the second layer consists of 8 parts by weight of oligoester acrylate resin, 0.4 parts by weight of 2'-hydroxy-2-methylpropiophene, and 50 parts by weight of ethyl acetate. The liquid was applied onto the first layer, dried with hot air, and then cured with a high pressure mercury lamp to form a second layer of about 1.5 μm, which was used as a dyeing layer.

The recording conditions are as follows.

Main scanning and sub-scanning Line density: 8 dots / mm Recording speed: Thermal head fixed Receiver speed: 16 ms / line Transfer member speed: 1/3 of the receiver speed in the same direction as the receiver speed Running speed Recording power: 17.5 w / mm ² Recording pulse width: 0 to 3.6 ms Table 3 shows the comparison results of the running properties, halftone image quality, and image receptor damage of the dye transfer body shown in Table 2.

As can be seen from Table 3, the transfer body and the image receiving body are fused when the slippery particles are not contained, and in the case of the conventional example, the running property is poor and the image receiving body is greatly damaged. In the case of particles having moldability, all of them have good runnability, good image quality, and no damage to the image receptor.

(Embodiment 6) FIG. 5 shows another embodiment of the present invention.

The present embodiment is different from the embodiment 1 shown in FIG. 1 in that the color material layer 18 contains a lubricant 17 made of silicone oil.

By adopting the above-mentioned constitution, in the halftone density region where the recording heat energy is relatively small, the slippery particles between the image receptor and the color material layer and the good halftone are provided by the slippery particles having the slipperiness or the heat releasing property. Achieve image quality.

Example 7 In the dye transfer body of the present invention, molybdenum disulfide particles having an average particle size of 2 μm were used in place of the ethylene tetrafluoride particles of Example 6, and paraffin wax having a melting point of 55 ° C. was used in place of silicone oil.

(Example 8) The dye transfer member of this example is a graphite particle having an average particle size of 1 µm in place of the ethylene tetrafluoride particles of Example 6, and a polyoxyalkylene silicone polymer (Nippon Unicar Co., Ltd.) in place of silicone oil. Manufactured by L-7500) was used.

Table 4 shows the measurement results of the running properties, halftone image quality, and image receptor damage of Examples 6 to 8 described above.

The method for producing the dye transfer material and the image receiving material, and the recording conditions are described in Examples 1 to 1.
It was the same as the case of 5.

As can be seen from Table 4, comparing with the conventional example of Table 3,
The use of the slippery particles improves the damage to the image receptor and the running property. Further, by adding a slipping substance to the color material layer, the running property in the high concentration region is further improved. The image quality and sensitivity of the active substance in the color material layer were not affected at all.

It should be noted that, in the examples, the description has been given of carbon fluoride particles, molybdenum disulfide particles, graphite particles, glass beads whose surface is coated with a slipping layer, and liquid silicone oil as the slipping particles, but the present invention is not limited to this. As the substance having a slipping property or a thermal releasing property, solid lubricants or anti-adhesion particles, specifically, tungsten disulfide, boron nitride, lead oxide, zinc oxide,
Examples include gold, lead, zinc, molybdenum selenide, tungsten selenide, niobium selenide, talc, mica, polyamide, polyacetal, melamine resin, urea resin, guanamine resin, cellulosic resin, starch and its derivatives.

In addition to silicone oil and polyoxyalkylene silicone polymer, liquid lubricants include liquid paraffin and other petroleum-based lubricating oils, halogenated hydrocarbons, diester oils,
Silicone oils, synthetic lubricating oils such as fluorosilicone oils, various modified silicone oils (epoxy modified, amino modified, alkyl modified, polyether modified, etc.), silicone based lubricants such as polyoxyalkylene glycol and other organic compounds and silicone copolymers Substances, various fluorochemical surfactants such as fluoroalkyl compounds, fluorochemical lubricants such as low-polymerized trifluoroethylene chloride, waxes such as paraffin wax and polyethylene wax, higher aliphatic alcohols, higher alcohols, higher fatty acids Examples include amides, higher fatty acid esters, and higher fatty acid salts.

In addition to magenta dyes, sublimable dyes include disperse dyes, basic dyes, and dye formers of basic dyes.

As the binder for the color material layer, polysulfone, polycarbonate, polyphenylene oxide, cellulose derivative or the like may be used.

EFFECTS OF THE INVENTION As is clear from the above, the present invention has a coloring material layer comprising at least a sublimable dye, a slippery particle having a slipping property or a heat releasing property, and a binder for binding them. However, since the slippery particles having the slipping property or the heat releasing property are projected from the reference surface of the coloring material layer, a stable relative distance between the transfer body and the image receiving body can be obtained in the multiple recording by the relative speed method. High-speed driving and excellent halftone image quality can be obtained.

[Brief description of drawings]

1, 2 and 5 are sectional views showing the constitution of the dye transfer body in the embodiment of the present invention, and FIGS. 3 and 4 are enlarged sectional views of the slippery particles, FIG. 6 and FIG. [FIG. 6] is a cross-sectional view showing a configuration of a conventional example. 10 ... Substrate, 11 ... Lubricant particles, 12 ... Color material layer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Nobuyoshi Taguchi, No. 1006, Kadoma, Kadoma City, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. (56) References JP 59-218892 (JP, A) JP 59-131496 (JP, A) JP 59-131495 (JP, A) JP 59-101399 (JP, A) JP 59-101398 (JP, A) JP 59-79788 (JP, A)

Claims (2)

[Claims] 1. A color material layer comprising at least a sublimable dye, particles having a slipping property or a heat releasing property, and a binder for binding them on a substrate, wherein the slipping property or the heat releasing property is provided. Particles having a surface is covered with a layer having a slip property or a heat releasing property, or a particle containing a substance having a slip property or a heat releasing property that is melted by a liquid or heat inside, A dye transfer body, which is projected from a reference surface of the color material layer. 2. At least a sublimable dye, particles having a slipping property or a heat releasing property, a liquid having a slipping property or a heat releasing property, or a substance that melts by heat or a surface-active material, and a binder for these substances, on a substrate. And a binder having a coloring material layer, wherein the particles having the slipping property or the heat releasing property are projected from the reference surface of the coloring material layer.