JP2605963B2 - Receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sublimation thermal transfer recording receiver.

[0002]

2. Description of the Related Art In OA terminals such as facsimile machines, printers, and copiers, which have been rapidly spreading in recent years, there is an increasing demand for visually easy-to-see color recording, and further development of technology for color recording of television images is desired. It is rare.

At present, color recording techniques based on electrophotography, ink jet, thermal transfer recording and the like are being studied for these purposes. Among these, the thermal transfer recording method is considered to be more advantageous than other methods because the maintenance and operability of the apparatus are easy and the apparatus and consumables are inexpensive.

In the thermal transfer recording system, the ink-coated surface of a color sheet in which an ink containing a dye binder or the like is applied on a sheet-like substrate is superimposed on an image receiving body, and the back surface of the color sheet is heated by a thermal head. The recording is performed by transferring the dye in the color sheet to the image receiving member.

The thermal transfer recording system includes a melt transfer system using a color sheet coated with a heat-meltable ink and a sublimation transfer system using a color sheet coated with an ink containing a sublimable dye. Since the amount of dye sublimation transfer can be controlled by adjusting the energy applied to the color image, the gradation expression is easy, which is particularly advantageous for full-color recording.

[0006]

In the sublimation transfer recording system, the image receiving body needs to dye the dye sublimated from the color sheet onto the image receiving body. Although it has a layer containing a high thermoplastic resin as a main component (hereinafter referred to as an image receiving layer), the temperature of the thermal head is generally 200 ° C. or more, so that the ink binder of the color sheet and the thermoplastic resin of the image receiving layer are used. There is a problem that the color sheet is softened or melted by heat, the color sheet and the image receiving body are fused, and peeling after recording becomes difficult.

As a method for preventing the fusion between the color sheet and the image receiving member, a method of improving heat resistance by using a crosslinkable resin for the image receiving layer (Japanese Patent Laid-Open No. 58-2153)
98, JP-A-58-212994) or a method of roughening the surface of an image-receiving layer by adding a pigment to the resin of the image-receiving layer (JP-A-57-107885).

An object of the present invention is to provide an image receiver having good releasability after transfer recording between an image receiver and a color sheet in the above-described sublimation thermal transfer recording.

[0009]

That is, according to the present invention, an image receiving layer formed on the surface of a substrate of an image receiving body for sublimation thermal transfer recording contains a thermoplastic resin as a main component and a fluorine-substituted long-chain alkyl group added thereto. hydrocarbons having, alcohols, carboxylic acids, sulfonic acids, sulfonic acid salts, and at least one fluorine compound selected from sulfonamides
The image receptor characterized by comprising formed by a by blending as a release agent composition is to its gist.

The image receiving body of the present invention is produced by applying a thermoplastic resin having a good affinity for a sublimable dye on a substrate of the image receiving body to form an image receiving layer. In order to contain a mold agent, a release agent is added to the resin solution,
It is carried out by a coating method.

The fluorine-based compound used as the release agent of the present invention includes a liquid, semi-solid or solid fluorocarbon-based compound, such as hydrocarbons, alcohols, and carboxylic acids having a fluorine-substituted long-chain alkyl group. Acids,
Sulfonic acids, sulfonates, sulfonamides and the like can be mentioned. They can be used alone or in mixtures
can do.

The above-mentioned release agent can be used as it is by adding it to the resin solution as it is, but it can be used in the form of an organic solvent or water solution, or an emulsion with water.
It can also be used in the form of a suspension. The release agent may be used in an amount of 0.1 to 150% by weight based on the thermoplastic resin used for forming the image receiving layer. small,
If the addition amount is too large, problems such as deterioration of the foaming properties of the dye and the storage stability of the recording are caused. Therefore, the addition amount of 1 to 80% by weight is appropriate.

As the thermoplastic resin used for forming the image receiving layer, a disperse dye is generally used as the sublimable dye. Therefore, a thermoplastic resin having a high affinity for the dye is selected. , Polyethylene terephthalate, saturated linear polyester resin containing polybutylene terephthalate as a main component, acrylic resin such as polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polybutyl acrylate, polystyrene resin, AS resin, polycarbonate resin, Examples thereof include polyarylate resin, polysulfone resin, polyvinylpyrrolidone, ethylcellulose, acetylcellulose, etc., which have good affinity with saturated linear polyester resin and acrylic resin disperse dye (dye).

When the above-mentioned thermoplastic resin is coated on an image receiving body, when the resin is a solid or a liquid having a high viscosity, for example, the resin is dissolved in an appropriate solvent to an appropriate concentration to obtain a resin. A method of applying the obtained solution on an image receiving body and then removing the solvent can be adopted.

As the solvent, methanol, ethanol,
Alcohols such as propanol, cellosolves such as methyl cellosolve and ethyl cellosolve, aromatic solvents such as benzene, toluene, xylene and chlorobenzene, esters such as ethyl acetate and butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone Ketones, chlorine solvents such as chloroform, methylene chloride and trichloroethylene, and various solvents such as dimethylformamide and N-methylpyrrolidone may be appropriately used.

In the image receiving layer, in addition to the thermoplastic resin and the release agent, silica in the form of fine particles is usually added in order to improve the coloring and fixing properties of the dye. Agents, antioxidants, fluorescent whitening agents and the like may be added. The image receiving layer can be formed by applying a liquid in which a releasing agent and the above additives are mixed with a resin liquid on an image receiving substrate. The coating method can be carried out using a reverse roll coater, a gravure coater, a rod coater, an air doctor coater, etc. (Yuji Harazaki, Maki Shoten, “Coating method” published in 1977).

The thickness of the image receiving layer formed on the substrate after drying is in the range of 6.1 to 10 μm, particularly preferably 1 to 5 μm.
The range of m is appropriate. As the base of the image receiving body, plain paper formed of cellulose fiber, synthetic paper formed of synthetic resin, plastic film, or the like is used.

Hereinafter, the present invention will be described in detail with reference to examples, but the examples do not limit the present invention.

Examples 1 to 3 a) Preparation of color sheet CI Disperse Blue 14 dye 2 g Ethyl cellulose 8 g Isopropanol 90 g １００ Total 100g Ink prepared by treating the mixture of the above composition with a paint conditioner using glass beads for about 30 minutes is applied to condenser paper (10μm) using a gravure proofing machine (plate depth 30μm) and dried. Then, a color sheet was manufactured.

Polyester resin (trade name: Byron 20)
0, manufactured by Toyobo Co., Ltd.) 20 g of methyl ethyl ketone
Dissolve in 100 ml, mix 5 g of release agent shown in Table 1 ,
The prepared liquid was applied to art paper weighing 104.7 g / m ^{2 using} a bar coater No. 3 (wet film thickness 24μm)
It was dried with hot air using a dryer to produce an image receiving body.

[0021]

[Table 1] Table 1 * Product name: F-Top EF-121 (manufactured by Shin-Akita Chemical Co., Ltd.)

C) Result of transfer recording The ink-coated surface of the color sheet is superimposed on the image receiving layer of the image receiving body, and a power of 0.6 W / dot is applied by using a thermal head having a heating resistor density of 4 dots / mm. , 4, 6, 8, and 10 milliseconds for recording. At the time of recording, the color sheet and the image receiving member could be easily peeled off after recording without fusing the color sheet and the image receiving member. The obtained recording had good gradation and a clear cyan color, and the resolution of each dot was also good.

The color density was measured by a densitometer RD-514 manufactured by Macbeth Co., USA (filter: Wratten No. 2).
It measured using 5). The color density is calculated by the following equation. Color density = log ₁₀ (I ₀ / I) I ₀ = Intensity of light reflected from standard white reflector I = Intensity of light reflected from test object

COMPARATIVE EXAMPLE 1 a) Production of Image Receiver The production was carried out in the same manner as in Examples 1 to 3 , except that no release agent was added. b) Transfer recording results Examples 1 to 3 using the image receiving body and the color sheet described above.
As a result of performing transfer recording in the same manner as in the above, the color sheet and the image receiving body were fused at the application time of 6, 8 and 10 seconds, and it was difficult to peel off after recording.

[0025] Another without the addition of Comparative Example 2 release agent, a transfer recording in the same manner as in Example 1-3 using the image receiving body manufactured in the same manner as in Examples 1 to 3 the color sheet As a result, the color sheet and the image receiving body were fused, and it was difficult to peel off after recording.

[0026]

By using the image receiving body of the present invention,
The color sheet can be easily peeled off after recording without fusing the color sheet and the image receiving member during recording, and a clear recorded matter with good gradation and resolution can be obtained.

Claims (1)

(57) [Claims] 1. A sublimation thermal transfer recording image receiving body having a substrate and an image receiving layer on the surface thereof, wherein the image receiving layer is mainly composed of a thermoplastic resin, and has a fluorine-substituted long-chain alkyl group-containing hydrocarbon or alcohol. features like, carboxylic acids, sulfonic acids, sulfonic acid salts, and to become formed by distribution <br/> combined comprising the composition of at least one as a release agent of fluorine-based compound selected from sulfonamides Receiver.