JPS6223792A - Dye transfer body - Google Patents

Abstract

PURPOSE:To enable the prevention of damage of the surface of an image- receiving body with runs at relative speeds of a transfer body and the image- receiving body by a construction wherein a coloring material layer formed of subliming dye, particles having lubricity or thermal releasing characteristics and a binder binding there substances is provided on a substrate. CONSTITUTION:A dye transfer body has a construction wherein a coloring material layer 12 formed at least of subliming dye, lubricative particles 11 having lubricity or thermal releasing characteristics and a binder binding these substances is provided on a substrate 10 and the lubricative particles 11 are made to project from a reference plane 13. The transfer body thus constructed does not quite closely contact with the image-receiving body, since the former contacts with the latter with the lubricative particles 11 working as contacting points, and neither welding nor excessive frictional force is caused between the transfer body and the image-receiving body, since the lubricity and release characteristics of the contacting points are large. Therefore, stable relative-speed recording can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dye transfer member for multiple thermal transfer recording using a relative speed method using a sublimable dye.

As a method of realizing multiple recordings in conventional technology thermal transfer recording,
"Recording method using thermal transfer ink film"
-129196) has been proposed. In this recording method, as shown in FIG. 6, a porous network structure 1 is provided on a substrate, and the running speed of a transfer body 3 impregnated with a hot-melt ink 2 is set to v/v/2 with respect to the running speed of an image receptor 40. n (n≧1)
The recording is performed by making the image small, suppressing it with a platen 6, and applying heat with a thermal head 6. As a dye transfer material using a sublimable dye, "dye transfer material" (Japanese Patent Application Laid-Open No. 69-88
No. 981) has been proposed. As shown in FIG. 7, this dye transfer body is provided with a coloring material layer 9 consisting of a sublimable dye, non-sublimable particles 8, and a binder that binds them together on a substrate 7. It is made to protrude from the coloring material layer reference plane, and is intended to prevent direct contact between the sublimable dye and the image receptor to obtain good halftone image quality.

Problems to be Solved by the Invention When applying a dye transfer body using a conventional sublimable dye to multi-time recording using a relative speed method, the slipperiness or thermal releasability of non-sublimable particles that are in direct contact with the image receptor are taken into account. Otherwise, excessive frictional force or fusion may occur between the dye transfer body and the image receptor.
A problem arises in that an image cannot be reproduced with good image quality if the image receptor surface is seriously damaged by non-sublimable particles even if a specified relative speed cannot be maintained, or if a specified relative speed cannot be maintained.

Means for Solving the Problems The present invention provides, on a substrate, a coloring material layer consisting of at least a sublimable dye, particles having slipperiness or thermal release properties, and a binder for binding these; The above-mentioned problem is solved by making particles having slipperiness or thermal release properties protrude from the reference surface of the coloring material layer.

Function The present invention employs the above-mentioned configuration, so that the transfer member and the image receptor come into contact with each other using particles having lubricity or thermal releasability as contact points. Therefore, while maintaining the conventional function of preventing direct contact between the sublimable dye and the image receptor and obtaining good halftone image quality, the contact area between the transfer body and the image receptor is small, and the contact point has smoothness and heat releasability. This reduces the fusion and frictional force between the transfer body and image receptor, and ensures good image quality and stable running performance even when performing transfer recording at a relative speed between the transfer body and image receptor. maintain. Further, the damage caused to the surface of the image receptor is also small.

Example Embodiments of the present invention will be described based on the drawings.

In FIG. 1, a coloring material layer 12 consisting of at least a sublimable dye, slippery particles 11 having slipping or thermal release properties, and a binder for bonding these is provided on a substrate 10, and the slippery particles 11 are This is a case where the particle size of the slippery particles 11 is larger than the thickness from the substrate to the coloring material layer reference surface 13 in a dye transfer body that is projected from the reference surface 13 of the coloring material layer 12 . Similarly, FIG. 2 shows the slippery particles 11.
This is the case when the particle size of ' is smaller than the thickness from the substrate to the coloring material layer reference surface.

FIG. 3 and FIG. 4 are diagrams showing examples of slippery particles in the present invention. Fig. 3 shows a particle 14 covered with a layer 16 having lubricity or heat releasability (hereinafter referred to as a lubricity layer), and Fig. 4 shows a particle 14 having an internal liquid state or a lubricity or heat release property that melts with heat. Substance (hereinafter referred to as liquid or heat-melting slippery substance) 16
This includes:

The substrate of the transfer body used in the present invention is not particularly limited, and is, for example, polyethylene terephthalate.

Ester polymers such as polyethylene naphthalate and polycarbonate, amide polymers such as nylon, cellulose derivatives such as 7-cetylcellulose and cellophane, imide polymers such as polyimide, polyamideimide, and polyetherimide can be used. . Further, a heat-resistant layer or a slippery layer is provided on the surface of the substrate that is in direct contact with the thermal head, if necessary.

Examples of dyes include disperse dyes, basic dyes, and diformers of basic dyes.

As the binder for the coloring material layer, for example, polysulfone is used.

Polycarbonate, polyphenylene oxide, cellulose derivatives, etc. are used.

Examples of particles having lubricity or thermal release properties (lubricity particles) include so-called solid lubricants or anti-stick particles,
Specifically, graphite and molybdenum disulfide.

Tungsten disulfide, boron nitride, lead oxide, zinc oxide,
Six basic resins such as gold, lead, zinc, molybdenum selenide, tungsten selenide, niobium selenide, talf, mica, ethylene tetrafluoride, polyamide, polyacetal, melamine resin, urea resin.

Examples include guanamine resin, cellulose resin, starch and its derivatives.

The slippery layer covering the particles may consist only of slippery particles, a liquid or heat-melting slippery substance, or a surfactant having slipperiness or heat-releasing properties, or it may be composed of slippery particles, a liquid or heat-melting slippery substance, a surfactant having slipperiness or heat-release properties, or a case in which these are dispersed in various resins. Examples include various configurations of things. Of course, commonly used secondary means such as refinement may also be used.

Examples of liquid or thermally meltable substances with lubricity or heat-releasing properties (liquid or heat-melting lubricious substances) and surfactants with lubricity or heat-releasing properties include petroleum-based lubricants such as liquid paraffin. oil, halogenated hydrocarbon, diester oil, silicone oil.

Synthetic lubricating oils such as fluorosilicone oil, various modified silicone oils (epoxy-modified, amine-modified, alkyl-modified, polyether-modified, etc.), silicone-based lubricating substances such as copolymers of silicone and organic compounds such as polyoxyalkylene glycol, Various fluorine-based surfactants such as fluoroalkyl compounds, fluorine-based lubricating substances such as trifluorochloroethylene low polymers.

Waxes such as paraffin wax and polyethylene wax, higher aliphatic alcohols, higher alcohols, higher fatty acid amides, and higher fatty acid esters.

Examples include higher fatty acid salts.

The transfer body configured as described above comes into contact with the image receptor using the slippery particles as contact points, so the transfer body and the image receptor do not come into complete contact with each other, and the contact points have high lubricity and releasability. Even when thermal transfer recording is performed with a relative velocity between the image receptor and the image receptor, stable relative velocity recording is possible without causing fusion or excessive frictional force. In addition, since the sublimable dye and the binder do not come into direct contact with the image receptor, non-uniform transfer does not occur, and damage caused by particles on the surface of the image receptor due to the relative speed movement between the transfer body and the image receptor can be caused by slipping particles. By using this method, a good gradation image can be reproduced without any occurrence.

Further explanation will be given below based on specific examples.

Example 1 A dye transfer body was prepared as follows. The thickness of the transfer substrate is 6μ
A coating solution having the composition shown in Table 1 was applied to the back side of the polyimide film No. 1 with a wire bar, dried with hot air, and then cured with a high-pressure mercury lamp.

(The following is a blank space) In Table 1, sublimable dyes and 1-, a magenta dye having the following structural formula I was used in common.

For the OH color material layer, each particle shown in Table 2 was dissolved in monochlorobenzene along with 4 parts by weight of polysulfone and 2 parts by weight of sublimable dyestuff.
Each transfer body was formed by coating the surface of the transfer substrate with a wire bar so that the weight of the dispersed diameter coating dye was about 0.397 m''.

Table 2 Particles were prepared as follows. Glass beads with an average particle size of 6 μm were mixed with 10 parts by weight of epoxy resin (Epicote 828° manufactured by Shell Chemical Co., Ltd.), 1 part by weight of triethylenetetramine as a curing agent, and polyoxyalkylene silicone copolymer (L-7500, manufactured by Nippon Unicar Co., Ltd.). ) 0.6 parts by weight, silica (MuXRO3II).

A coating solution consisting of 3 parts by weight of R972 (manufactured by Nippon Aerosil Co., Ltd.) and 100 parts by weight of methyl ethyl ketone was coated using a sufficiently dispersed diameter fluid coating device to give a coating film thickness of about 1 μm.

Particles ■ were prepared as follows. Melamine resin (Sumitex Resin M-3, manufactured by Sumitomo Chemical Co., Ltd.) 20 parts by weight, curing agent (Sumitex Accelerator 50X, manufactured by Sumitomo Chemical Co., Ltd.) 2 parts by weight, silicone oil (L-45, Japan) Unicar Co., Ltd. 1 part by weight.

A mixture of 40 parts by weight of water was sufficiently stirred using a high-speed stirrer, then granulated into spheres using a spray dryer, and heated in a constant temperature bath for 12 hours.
After curing at 0° C. for 2 hours, it was classified to prepare particles with an average particle size of 7 μm.

The image receptor used for recording is made of white pigment layer-coated synthetic paper with a polypropylene base, and a coating liquid consisting of 16 parts by weight of an aqueous polyester resin (Pyronal MD1200 Toyobo Co., Ltd.) and 30 parts by weight of water as the first layer. Approximately 6μ with wire bar
The second layer was 8 parts by weight of an oligoester acrylate resin.

2'-Hydroxy-2-methylpropiophene 0.4
A coating solution consisting of 60 parts by weight of ethyl acetate and 60 parts by weight of ethyl acetate was applied onto the first layer, dried with hot air, and then cured with a high-pressure mercury lamp to form a coating solution of about 16 parts by weight.
A dyed layer was used in which a second layer of .mu.m was formed.

The recording conditions were as follows.

Main scanning, sub-scanning line density: 8 dots/IIIB recording speed:
Thermal head fixed image receptor running speed: 1 ems/line Transfer body running speed: In the same direction as the image receptor running speed, the running speed is less than the running speed of the image receptor Recording electric crab 17.5 W/parrot 2 Recording pulse width: 0 ~3. ems Table 3 shows the results regarding runnability, halftone image quality, and damage to receiver paper.

Table 3 As can be seen from Table 3, when particles are not included, the transfer body and image receptor are fused together, and even when particles are included, alumina has poor running properties and causes great damage to the image receiving paper. However, in the case of particles having slipperiness or thermal release properties, both the running properties and the image quality are good, and there is no damage to the receiving paper.

FIG. 6 shows still another embodiment of the present invention. On the substrate 10 are at least a sublimable dye, lubricant particles 11 having lubricating properties or heat releasing properties, a lubricating substance 17 consisting of a liquid or heat-melting substance or surfactant having slipping properties or heat releasing properties, and A coloring material layer 18 made of a binding material for binding these particles is provided, and the slippery particles 11 protrude from the coloring material layer reference surface 13. Note that secondary means such as linearization, which is commonly used, may be used in combination with the coloring material layer in order to increase lubricity and heat release properties.

By adopting the above configuration, in the halftone density region where the recording heat energy is relatively small, particles with slipping or thermal release properties can make the gap between the image receptor and the coloring material layer smoother and improve the halftone image quality. In the saturated concentration range where the recording thermal energy is large, even when the surface of the coloring material layer comes into direct contact with the surface of the image receptor due to wear and softening of the particles or softening of the image receptor, it remains in a liquid state with slipperiness or heat releasability or melts at high temperatures. By preventing fusion using a semi-solid substance or surfactant, stable relative velocity can be maintained over the entire density range and excellent halftone image quality can be achieved.

Liquid or thermally meltable substances or surfactants (lubricious substances) that have lubricity or thermal release properties include:
Examples include petroleum-based lubricating oils such as liquid paraffin, synthetic lubricating oils such as halogenated hydrocarbons, diester oils, silicone oils, and fluorosilicone oils, and various modified silicone oils (epoxy-modified, amino-modified, etc.).

(alkyl-modified, polyether-modified, etc.), silicone-based lubricating substances such as copolymers of silicone and organic compounds such as polyoxyalkylene glycol, and various fluorine-based surfactants such as fluoroalkyl compounds.

Fluorine-based lubricating substances such as trifluorochloroethylene low polymers, waxes such as paraffin wax and polyethylene wax, higher fatty acids, higher aliphatic alcohols, higher alcohols, and higher fatty acid amides.

Examples include higher fatty acid esters and higher fatty acid salts.

Further explanation will be given below based on specific examples.

Example 2 A dye transfer body was prepared as follows. The same transfer substrate and sublimable dye as in Example 1 were used in common.

The coloring material layer was prepared by dissolving the composition shown in Table 4 in monochlorobenzene together with 4 parts by weight of polysulfone and 2 parts by weight of sublimable dye I.
Each transfer body was formed by coating the surface of the transfer substrate with a wire bar so that the weight of the dispersed diameter coating dye was approximately 0.39/d.

(Left below) Polyoxyalkylene silicone copolymer is L-75
00, Nippon Unicar Co., Ltd. M, silicone oil L-
46 Manufactured by Nippon Unicar Co., Ltd., tetrafluoroethylene resin is L
-5, manufactured by Daikin Industries, Ltd. was used.

The image receptor used for transfer recording was a white pigment layer coating type synthesis of a polypropylene base, and a water-based polyester resin (Pyronal MDI 200, Toyobo Co., Ltd.) 16 as the first layer.
Approximately 6 parts by weight and 30 parts by weight of water were added to the coating solution using a wire bar.
μm coating and 8 parts by weight of oligoester acrylate resin as the second layer.

A coating solution consisting of 0.4 parts by weight of 2'-hydroxy-2-methylpropiofuf and 50 parts by weight of ethyl acetate was applied onto the first layer, dried with hot air, and then cured with a high-pressure mercury lamp to give a coating of approximately 1.5 parts by weight.
A dyed layer was used in which a second layer of .mu.m was formed.

The recording conditions were as follows.

Main scanning and sub-scanning line density: 28 dots/recording speed: thermal head fixed image receptor traveling speed: 16 m5/line As is clear from the above, in the dye transfer body, at least the sublimable dye and the lubricating or It has a coloring material layer consisting of particles having heat releasability and a binder that binds them together, and the particles having slipperiness or heat releasability are made to protrude from a reference surface of the coloring material layer. As a result, stable relative speed running between the transfer member and image receptor and excellent halftone image quality can be obtained in multiple recordings using the relative speed method.

[Brief explanation of drawings]

1, 2, and 5 are cross-sectional views showing the structure of a dye transfer body in an embodiment of the present invention, FIGS. 3 and 4 are enlarged cross-sectional views of the main parts thereof, and FIGS. 6 and 7. is a sectional view showing the configuration of a conventional example. 1o...Base, 11...Slippery particles, 1
2...Coloring material layer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 6 Figure 7

Claims (4)

[Claims] (1) A coloring layer comprising at least a sublimable dye, particles having lubricity or thermal release properties, and a binder that binds them together on a substrate, and having the lubricity or heat release properties. A dye transfer material, characterized in that the particles protrude from the reference surface of the coloring material layer. (2) The dye transfer material according to claim 1, wherein the particles having slipperiness or heat release properties are particles whose surfaces are covered with a layer having slipperiness or heat release properties. . (3) Claim 1, characterized in that the particles having lubricity or heat release properties are particles containing therein a substance having lubricity or heat release properties that is liquid or melts by heat. Dye transfer material as described. (4) At least a sublimable dye, particles having slipperiness or thermal release properties, liquid or thermally meltable substances or surfactants having slipperiness or heat release properties, and a binder that binds them together on the substrate. 1. A dye transfer material comprising a coloring material layer comprising a coloring material, wherein the particles having lubricity or heat releasability protrude from a reference surface of the coloring material layer.