JPH022064A - Thermal transfer recording member - Google Patents

Abstract

PURPOSE:To obtain a high sensitivity transfer image having good storage stability by providing a photothermal converting layer containing a polymer having a specific structure as a near infrared absorbing dye on a transparent support to semiconductor laser beam having a specific oscillation wavelength region. CONSTITUTION:A support to be used may be transparent to semiconductor laser beam having an oscillation wavelength region at 900-700nm and is com posed of an inorg. material such as glass or quartz glass, a thermoplastic resin such as polymethylmethacrylate or polycarbonate or a thermosetting resin such as an epoxy resin and the near infrared absorbing dye due to the photother mal converting layer provided on the support is represented by formula I or II. In this near infrared absorbing dye, as examples of the anion X<-> of an elec trolyte having an isothianaphthene or pyrrole structure, Cl<->, Br<->, I<-> and CIO4<-> can be designated. A polymer material layer containing said near infrared absorbing dye can be provided on a transparent support by a coating method or an electrolytic polymerization method and, if necessary, a binder such as a urea-melamine resin may be used.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a thermal transfer recording member, and more specifically,
The present invention relates to a thermal transfer recording member for efficiently performing thermal transfer recording using semiconductor laser light.

[Conventional technology]

Conventionally, as a printing method using a thermal transfer printer, a method is generally used in which ink applied to an ink film is thermally melted by a thermal head, and then transferred to an object to be transferred for printing. However, when using a thermal head, the printing speed is limited because the printing Oo pulse period cannot be made shorter than 2 m5ec in order to maintain thermal characteristics and protect the heating resistor.

[Problem to be solved by the invention]

In order to solve this problem, Japanese Patent Application Laid-Open No. 58-87073
It has been proposed to use a heat storage layer. However, this method is not necessarily effective for semiconductor lasers. Currently, high output power can be obtained with semiconductor lasers at 900 nm.
~700 nm, and thus dyes that absorb in this wavelength range are effective heating elements. A method for high-speed printing by directly melting ink applied to an ink film using laser light was developed in Japanese Patent Application Laid-Open No. 59-143.
657, etc., however, a high-output laser is required to directly melt the ink at high speed, and it is difficult to increase the speed with a compact light source such as a semiconductor. In order to solve these problems, methods have been proposed such as using a light bulb or a heat storage layer using carbon or the like.
These methods are insufficient to obtain clear images at low energies. Also, in JP-A-61-291184,
Attempts to obtain clear transferred images using leuco dyes in combination with color developers have been proposed, but since the resulting transferred images are based on leuco dyes, they are not suitable for long-term storage.

Accordingly, an object of the present invention is to provide a thermal transfer recording member capable of obtaining transferred images with high sensitivity and good storage stability at high speed.

[Means to solve the problem]

In order to solve the above problems, the present invention aims to solve the above problems.
On a support transparent to semiconductor laser light having an oscillation wavelength range in nm, as a near-infrared absorbing dye, the following formula, y- [In the above formula, R3 and R2 are each independently hydrogen or a carbon number of 1 to 5 represents a hydrocarbon group, X- represents an anion of the electrolyte, y is a number from 0.1 to 1 indicating the proportion of anion per mole of monomer, and n represents the degree of polymerization from 5 to 5.
00], or a polymer having an isothianaphthene structure represented by the following formula, z- [In the above formula, R3 and R4 each independently represent hydrogen or a hydrocarbon group having 1 to 5 carbon atoms; , Y- represents an anion of the electrolyte, 2 is a number from 0.1 to 1 indicating the proportion of anion per mole of monomer, and n is 5 to 5 indicating the degree of polymerization.
Provided is a thermal transfer recording member using a semiconductor laser beam, which is provided with a light-heat exchange layer containing a polymer having a virole structure, which is represented by the number 00].

[For production]

That is, the present invention provides a thermal transfer recording member for efficiently performing thermal transfer recording by providing a near-infrared absorbing dye layer on a support transparent to semiconductor laser light to form a light-to-heat conversion layer. It is. By efficiently converting semiconductor laser light into heat using this member and heating the thermal transfer film, it becomes possible to obtain a good transferred image on the receptor.

The support used in the member of the present invention may be any material as long as it is transparent to semiconductor laser light, and may include inorganic materials such as glass and quartz glass, polymethyl methacrylate, polycarbonate, polystyrene, polyethylene terephthalate, polyamide, acetal resin, and polyphenylene. sulfide,
Polyphenylene oxide, polyimide resin, polyether sulfone, polysulfone, wholly aromatic polyester,
It may be made of thermoplastic resin such as wholly aromatic polyamide or polyacrylate, or thermosetting resin such as epoxy resin or diallyl phthalate resin.

The near-infrared absorbing dye of the light-to-heat conversion layer provided on such a transparent support has the above general formula. In these near-infrared absorbing dyes, examples of the anion X- of the electrolyte with isothianaphthene structure or pyrrole structure include CI-, Br-
, I −, ClO4, −, BP4PF, −, AsF, −
,SbP,-,AlCl4-, 8IBICI-
.

FeCl4-. Examples include 5nCI3- + CF35O:l-.

These near-infrared absorbing polymer material layers can be provided on a transparent support by a coating method, an electrolytic polymerization method, etc., and a binder may be used if necessary. Binders that can be used include urea-melamine resin,
Urea-formalin resin, epoxy resin, urethane resin,
Examples include acrylic resin, polyester resin, polyimide resin, polyether resin, and polysulfone resin. Furthermore, in order to prevent damage to the light-to-heat conversion layer due to contact with the thermal transfer film, a coating layer made of butyral resin, nitrocellulose resin, silicone overcoat agent, or the like may be further applied thereon.

〔Example〕

The present invention will be further explained below with reference to Examples.

Example 1 To 2.0 g of a 20% solution of Byron 200 (Toyobo (+ Xun Co., Ltd., polyester) in methyl ethyl ketone,
1.0 g of polyisosothianaphthene and 1.0 g of methyl ethyl ketone were dispersed using a paint conditioner, and this dispersion was coated on a 25 mm x 751 square x 2 crane glass plate using a coater so that it would have a thickness of 5 mm after drying. Coated. This was designated as sample 1.

Polymethyl methacrylate in methyl ethyl ketone 20
1.0 g of poly(5-methoxyisothianaphthene) and 1.0 g of methyl ethyl ketone in 2.0 g of wt% solution.
was dispersed using a paint conditioner, and this dispersion was coated on a 25 mm x 75 m x 2 ml glass plate using a coater so that it had a thickness of 5 mm after drying. This was designated as sample 2.

Disperse 1.0 g of poly(5,6-dinitoxyisothianaphthene) in 1.0 g of a 20% by weight solution of epoxy resin in methyl ethyl ketone using a paint conditioner. A coater was used to coat a polycarbonate plate to a thickness of 5 mm after drying.

This was designated as sample 3.

20% polyimide varnish in dimethylformamide
Disperse poly(5,6-cyoxymethyleneisothianaphthene) in the solution using a paint conditioner, and apply this to a 25+n x 75m x 2n glass plate using a coater so that the thickness after drying is 5-. did. This was designated as sample 4.

Poly (5,6-dibutoxyisothianaphthene) was dissolved in dimelformamide, and this was
Using a coater on a 2m glass plate, the thickness after drying is 5-
It was applied so that This was designated as sample 5.

Poly(5,6-medoxyvirol) was dissolved in dimethylformamide, and this was coated on a 25 mm x 75 ms x 2 glass plate using a coater so that the thickness after drying would be five lines. This was designated as sample 6.

Using the sample of the thermal transfer recording member obtained above, it was combined with a commercially available thermal transfer ink ribbon, and a semiconductor laser (Dekani 10100O, wavelength: 830 nm, manufactured by Sony, 5LD304) was passed through the optical system to create a spot with a diameter of 50 voices. A good transferred image was obtained by irradiating for 5 m5ec.

Figures 1 to 6 show 30 times enlarged views of the resulting transfer image. 1 to 6 correspond to samples 1 to 6, respectively. For comparison, 30 times enlarged views of images transferred by commercially available word processors, Toshiba Lupo 70GX (24 dots) and Canoward Mini Alpha 10 (32 dots) are shown in Figures 7 and 8, respectively.

Also, the dot space is 60 horizontally and 80 vertically, and 8
4111s6 matrix of 0 dots x 100 dots
Table 1 shows the results of continuous transfer using a Macbeth reflection densitometer.

Jeng no 1 Sat number anti ■ 4 degrees 1 . 1 2.0 3.2 4.1 5.4 6.0 From the above results, it can be seen that by using the thermal transfer recording member of the present invention, an extremely clear transferred image with good print quality can be obtained.

〔Effect of the invention〕

By using the thermal transfer recording member of the present invention, it is possible to efficiently obtain a transferred image with high sensitivity, clarity, and good storage stability.

[Brief explanation of the drawing]

FIGS. 1 to 6 are 30 times enlarged views of transferred images of samples 1 to 6 of the example, respectively. 7 and 8 are 30 times enlarged views of images transferred by commercially available word processors, Toshiba Lupo 70GX (24 dots) and Canoward Mini Alpha 10 (32 dots), respectively.・Φ Figure 1 4. . To. Kyouro rumors 0 No. 3 1 mm Turtle bone custom No. 5 mm ・ ・ ・ ・ ・ Broom 70 lnnm ・ ψ Tatami No. 2 1, I・ Jishayu 4 1 mm Excuse・ Parable ・ 弗 6 Commm -・ Ai Sochi -9 Chuutei 8 imm

Claims (1)

[Claims] 1. On a support transparent to semiconductor laser light having an oscillation wavelength range of 900 to 700 nm, as a near-infrared absorbing dye, there are the following formulas, ▲ mathematical formulas, chemical formulas, tables, etc. ▼ and /or ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [In the above formula, R_1 and R_2 each independently represent hydrogen or a hydrocarbon group having 1 to 5 carbon atoms, X^- represents an anion of the electrolyte, and y is a number from 0.1 to 1 indicating the proportion of anions per mole of monomer, and n is a number from 5 to 500 indicating the degree of polymerization] A polymer having an isothianaphthene structure, or The following formula, ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ and/or ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [In the above formula, R_3 and R_4 each independently represent hydrogen or a hydrocarbon group having 1 to 5 carbon atoms. [ A thermal transfer recording member using semiconductor laser light, which is provided with a light-to-heat conversion layer containing a polymer having a pyrrole structure.