JPS60229791A - Dye transfer body - Google Patents

Abstract

PURPOSE:To obtain a dye transfer body which is excellent in the color reproducibility with a better black image by arranging at least one kind of specified sublimating dyes to be contained in each color material layer in the dye transfer body in which three coloring material layers different in the color are arranged sequentially. CONSTITUTION:Three color inks (cyane, yellow and magenta) which at least kind of sublimating dyes selected from among naphthoquinone of formula I presenting cyane color, an anilin derivative of formula II presenting yellow color and an anilin derivative of formula III presenting magenta color (in the formulas I, II and III, X represents hydrogen atom or a methyl group and R and R' each represent 1-4C alkyl group), a high-melting-point or high-softening-point resin and a solvent are prepared. These inks are applied sequentially on the surface of a substrate made of a heat resistant high polymer film or the like to form a three-side coloring material layer.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dye transfer member used for thermal transfer recording, and is particularly applicable to high-speed recording using electronic devices such as thermal heads and laser beams.

Structure of the conventional example and its problems Conventionally, this recording method has used a transfer body containing a highly stable dye for transfer printing of polyester fibers, but such a transfer body has a low sublimation property of the dye. The coloring power was poor, and it was difficult to obtain sufficient color density using the thermal energy of a normal thermal head. Furthermore, although ionic dyes containing highly sublimable color formers can provide sufficient color density, they have problems with storage stability.

In addition, with conventional transfer materials, the consistency of the density characteristics of the three colors cyan, magenta, and yellow was poor, and not only was it not possible to obtain a sufficient black image in halftones and saturation density, but the color reproducibility of other colors was also poor. However, it was also insufficient compared to color printing.

Purpose of the Invention The present invention uses cyan, magenta, and yellow sublimable dyes that are stable and have excellent sublimation ability to obtain color recording with black intermediate tones and sufficient saturation density, and with excellent color reproducibility. The object of the present invention is to provide a dye transfer member from which an image can be obtained.

Structure of the Invention The present invention provides the following general formula (1), (FD,
(It is a dye transfer material in which three color material layers each containing at least one type of sublimable dye represented by 110 and having different hues are sequentially arranged, and the color reproducibility of each color including black is can provide excellent images.

NHR (In the formula, or a hydrogen atom or a methyl group, R and R' each represent a methyl group, an ethyl group, a linear or branched propyl group, or a butyl group) Description of Examples The general formula (+ > , (IQ, (Specific examples of sublimable dyes represented by l include the following.

(1) exhibiting a cyan color 1.6-bis(methylamine)-4,8-naphthoquinone, 1,6-bis(ethylamino)-4°8-naphthoquinone, 1,6-
Bis((fI)-propylamino)-4,8-naphthoquinone, 1,6-bis((iso)-propylamino)-
4,8-naphthoquinone, 1,6-bis((→-butylamino)-4°8-naphthoquinone, 1,6-bis((ig
o)-butylamino)', e-naphthoquinone, 1-methylamino-6-ethylamino-4,8-naphthoquinone, 1-methylamino-6-(→-propylamino-4,
8-naphthoquinone, 1-methylamino-5-(→-butylamino-4,8-naphthoquinone, 1-methylamino-
5-(igo)-propylamino-4,8-naphthoquinone, ethylamino-5-(n)-propylamino-4
, 8-naphthoquinone, 1-ethylamino-6-(→-butylamino-4,8-naphthoquinone, 1-(→-propylamino-5-(111)-butylamino-4,8-naphthoquinone.

4-(2,2
-dicyanovinyl)-N,N-dimethylaniline, 4-
(2,2-dicyanovinyl)-N,N-diethylaniline, 4-(2,2-dicyanovinyl)-NyN”(
→-Glopylaniline, 4-(2,2-dicyanovinyl)-N,N-di(iso)-propylaniline, 4-(
2,2-dicyanovinyl) -N, N-di(→-butylaniline, 4-(2,2-dicyanovinyl)-N,
N-di(1so)-butylaniline, 4-(2,2-dicyanovinyl)-N, N-di(sea)-butylaniline, 3-methyl-4-(2,2-dicyanovinyl)-N, N-dimethylaniline, 3-methyl-4-(2
,2-dicyanovinyl)-N,N-diethylaniline,
3-Methyl-4-(2,2-dicyanovinyl) -N
, N-di(→-globylaniline, 3-methyl-4-
(2,2-dicyanovinyl)-N.

N-di(iso)-propylaniline, 3-methyl-4
-(2,2-dicyanovinyl)-N,N-di(ro)-butylaniline, 3-methyl-4-(2,2-dicyanovinyl)-N,N-di(iso)-butylaniline, 3 -Methyl-a-(2,2-dicyanovinyl) -N
, N-di(sec)-butylaniline, 4-(2,
2-dicyanovinyl)-N-ethyl-N-(→-propylaniline, 4-(2,2-dicyanovinyl)-N-ethyl-N-(→-phthylaniline, 4-(2,2-dicyanovinyl) -N-methyl-N-(→-propylaniline, 4-(2,2-dicyanovinyl)-N-methyl-N-(→-butylaniline, 3-methyl-4-(2,
2-dicyanovinyl)-N-methyl-N-(n)-furohylaniline, 3-methyl-4-(2,2-dicyanovinyl)-N-mef-N-(→-phthylaniline, 3-
Methyl-4-(2,2-dicyanovinyl)-N-ethyl-N-(→-propylaniline, 3-methyl-4-(2
, 2-dicyanovinyl)-N-ethyl-N-(→-butylaniline, 4-tricyanovinyl-N, N-dimethylaniline, 4-tricyanovinyl-N, which exhibits a magenta color represented by a seagull) , N-diethylaniline, 4-tricyanovinyl-N,N-cy(→-prohylaniline, 4-tricyanovinyl-NN-di(i8)-propylaniline,
4-tricyanovinyl-N,N-di(Xll)-butylaniline, 4-tricyanovinyl-N,N-di(i g
o)-Butylaniline, 4-tricyanobi= /L/
-N, N-di(8ec)-butylaniline, 3-methyl-4-tricyanovinyl-N, N-dimethylaniline, 4-tricyanovinyl-N-mef-N-(→-propylaniline, 4 -Tricyanovinyl-N-methyl-
N-(fl)-phthylaniline, 4-tricyanovinyl-N-ethyl-N-(→-propylaniline, 4-tricyanovinyl-N-ethyl-N-(=)-butylaniline, 4-tricyanovinyl -N-ethyl-N-(
1so) -phthylaniline, 4-tricyanovinyl-
N-ethyn, -N-(sea)-butylaniline,
4-Dolycyanovinyl-N-(n)-propyl-N-
(n)-Butylaniline, 3-methyl-4-tricyanovinyl-N-)f-N-ethylaniline.

As a method for producing an ink for forming a coloring material layer, a dye represented by the general formula (1), (U) or (I[D) is mixed with a resin having a high melting point or softening point and a solvent such as a solvent or water. and non-sublimable particles.

The resin used to prepare the above ink may be those used in ordinary printing inks, such as rosin, phenol, xylene, petroleum, vinyl, polyamide, alkyd, nitrocellulose, Oil-based resins such as alkyl cellulose, alkyl celluloses, ethyl-based, ester-based resins, or water-based resins such as maleic acid-based, acrylic acid-based, casein, shellac, and glue can be used, but more specifically melting point or softening point Particularly effective are polycarbonate, folysulfone, polyphenylene oxide, polyarylate, cellulose derivative, etc., which have a high carbon content.

Solvents for ink preparation include methanol, ethanol, furopanol, butanol, etc.
-/l/, cellosolves such as methyl cellosolve and ethyl cellonorb, aromatics such as benzene, toluene and xylene, esters such as butyl acetate, acetone,
Ketones such as methyl ethyl ketone and cyclohexanone, hydrocarbons such as ligroin, cyclohexane, and kerosene, and halogenated hydrocarbons such as dimethylformamide, methylene chloride, chlorobenzene, and riqoform can be used, but when using water-based resins, It is also possible to use water or a mixture of water and the above-mentioned solvents.

The substrate used in the present invention is not particularly limited, but polymer films are particularly useful. For example, ester polymers such as polyethylene terephthalate, polyethylene naphthalate, and polycarbonate, amide polymers such as nylon, cellulose derivatives such as acetyl cellulose and cellophane, polyvinylidene fluoride, and ethylene tetrafluoride-67) propylene copolymers. , fluorine-based polymers such as Teflon, ether-based polymers such as polyoxymethylene, polyacetal, olefinic polymers such as polystyrene, polyethylene, polypropylene, methylpentene polymers, imide-based polymers such as polyimide, polyamideimide, polyetherimide, etc. Polyester-based polymers are particularly useful because they are thin, have a certain degree of heat resistance, and are inexpensive.

In addition, imide-based, amide-based, and other polymers whose substrates are more heat resistant than polyester polymers are useful because they have excellent heat resistance when the transfer body is used repeatedly or at high speeds.

This will be explained using more specific examples.

6 parts by volume of dyes represented by the following structural formulas (1), (Kon, and (3)) and 4 parts by volume of polysulfone were dissolved in 100 parts by volume of methylene chloride.On the other hand,
A divinylbenzene-based polymer composition, spherical particles made of glass or iron with an average particle size of 8 μm2 and a standard deviation of 0.6 μm, were separately added to the above solution in α4 volume parts and dispersed ultrasonically to form a polyimide with a thickness of 13 μm. Film I/c3
Three color dye transfers were made by casting milled stainless steel wire with a wire bar.

ONHC3H, (n) The coated portions of these transfer bodies and an image receptor having a coat layer containing polyester and inorganic fine particles were brought into close contact with each other so as to face each other, and a recorded dye image was drawn using a thermal head. The recording conditions were as follows.

Linear density of main scanning and sub-scanning: 4 dots/state Recording power: 0
．． 7W/dot head heating time = 8m crown At this time, the cyan, magenta, and yellow reflection recording densities were 1.6.1 and 4.0.9, respectively, and when the head heating time was varied from 0 to 5m5ec. The concentration characteristics are shown in FIG. Further, when a black image was recorded by using three color transfer bodies of cyan, magenta, and yellow and superimposed on the same image receptor, the same black density characteristics as shown in FIG. 1 were obtained. Furthermore, when each density of black was plotted on the chromaticity diagram shown in FIG. 2, all of the densities were concentrated near the point indicated by B. Further, when cyan, yellow, and magenta colors were appropriately superimposed to produce a mixed color, the chromaticity points of each color as shown in FIG. 2 were obtained. As described above, the image produced using the dye having the chemical structure of the present invention was able to provide black and color reproducibility of each color, saturation density, and halftone comparable to color printing.

Note that among the dyes used in the above examples, the sublimable dye represented by the formula (1) was replaced by the following formula (1).

(4, (The results are also similar to those of the above example using (1) - 2 parts by volume, (→ = 2 parts by volume, and (ni) = 1 part by volume of the dye represented by ee). there were.

Below is the margin (KIH7C3HN OH5C2HN 0(1)(→ The same result can be obtained as well.

Furthermore, when the sunlight fastness of these dye images was tested in accordance with the standard of T Is, LO841, a value of 'G~6 class was obtained, and it was determined that the dye images were sufficiently durable for practical use.

Effects of the Invention As described above, the dye transfer material of the present invention can obtain the image quality of a color printing plate in terms of color reproducibility, saturation density, and intermediate tones of each color including black, and has excellent sunlight resistance and other properties. Stability can also be imparted.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams illustrating the characteristics of a dye transfer body in an embodiment of the present invention. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] (1) The following general formula (1), (IQ, (
A dye transfer body in which three coloring material layers each containing at least one kind selected from sublimable dyes represented by IID and having different hues are sequentially arranged. (In the formula, X represents a hydrogen atom or a methyl group, R and R' each represent a methyl group, an ethyl group, a linear or branched propyl group, or a butyl group)
, (II) or (Kon), the dye transfer material according to claim 1, wherein one color material layer is composed of two or more sublimable dyes having different substituents. ), (II) t (llf), and the coloring material layers on three sides each containing at least one sublimable dye selected from t (llf), and the general formulas (1) and (11).
, (The dye transfer material according to claim 1 or 2, characterized in that the fourth coloring material layer selected from at least one type from each of the songs is arranged in a plane-sequential manner.