JPH0396950A - Sheet-like optical recording material - Google Patents

Abstract

PURPOSE:To allow the direct formation of recording images with irradiation with a laser beam and to eliminate the need for developing and fixing processing by providing a paint coated layer consisting of a specific color developing compsn. on a sheet-like base body. CONSTITUTION:This optical recording material is provided with the paint coated layer contg. a cation photoreaction initiator (A), a sensitizing dyestuff (B) and a color developing dyestuff (C) as its essential components on the sheet-like base body. A diphenyl halide salt, etc., are usable for the component A; a cyanine dyestuff, etc., for the component B and a triphenyl methane phthalide dyestuff, etc., for the component C, respectively. The optical recording material is formed by preparing a coating liquid contg. such color developing components and a binder resin, and applying the soln. on synthetic paper, etc. The images are formed by exposing the laser beam imagewise to this material.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sheet-like optical recording material. More specifically, the present invention relates to a sheet-like optical recording material useful as an optical recording material that is irradiated with a laser beam.

(Prior Art and Problems to be Solved by the Invention) In recent years, optical information processing technology that applies optical fiber and laser technology has been developed. In this optical information processing technology, optical recording media as data output media use a latent image type or toner to form or fix an image using an electrophotographic method such as a printer using a laser beam. development, toner transfer and fixing processes are required. As a result, the mechanism of the printer becomes complicated, the main body becomes large, and the power consumption increases. Therefore, maintaining and managing the printer requires a great deal of cost and effort.

Therefore, there has been a demand for the development of an optical recording abrasive that does not require toner transfer and fixing processes and can directly record images by laser beam irradiation.

(Means for Solving the Problems) The sheet-like optical recording material according to the present invention comprises a photocationic reaction initiator, a sensitizing dye, and a coloring dye (hereinafter referred to as a coloring composition) formed on at least one surface of a sheet-like substrate. It is characterized by having a paint coating layer containing as a main part.

Furthermore, in the sheet-like optical recording material of the present invention, the paint coating layer may contain a mixture of the coloring composition and a pigment. A sheet-like optical recording material having such a paint coating layer can produce a good recorded image by irradiation with a laser beam.

Next, the effects of each part in the present invention will be explained.

First, the sensitizing dye absorbs light of a predetermined wavelength and becomes excited. Energy is transferred from the excited dye to the photocationic reaction initiator, and the photocationic reaction initiator is decomposed. Acid is generated. Next, the coloring dye develops color upon contact with this acid, and it is understood that an image can be obtained directly without any development or fixing treatment.

Examples of the photocationic reaction initiator that can be used in the present invention include aromatic diazonium salts, triphenylsulfonium salts, halogenated diphenyl salts, sulfonic acid esters, organic halogen compounds, photosensitive dyes, and iron-arene compounds.

Sensitizing dyes that can be used in the present invention include cyanine dyes, styryl dyes, pace styryl dyes, porphyrin dyes, xanthene dyes, thioxanthene dyes, thiazine dyes, coumarin dyes, and ketocoumarin dyes. There are pigments such as biryllium salt pigments, thiopyrylium salt pigments, thiazole pigments, quinoline pigments, penzophenone pigments, and thiobenzophenone pigments, as well as cyanine pigments, xandene pigments, styryl pigments, thiazine pigments, and benzophenone pigments. Particularly preferred are dyes and thiobenzophenone dyes. These sensitizing dyes can be selectively used depending on the wavelength of the laser light source.

In addition, coloring dyes that can be used in the present invention include triphenylmethane dyes, triphenylmethanephthalide dyes, phenothiazine dyes, phenoxazine dyes, fluoran dyes, indolylphthalide dyes, azaphthalide dyes, There are diphenylmethane dyes, clomepyrazole dyes, leucoauramine dyes, rhodamine lactam dyes, azomethine dyes, and leukoisanthene dyes, as well as triphenylmethane phthalide dyes, indolyl phthalide dyes, azaphthalide dyes, Particularly preferred are fluoran dyes, rhodamine lactam dyes and leucoxanthene dyes.

In the sheet-like optical recording material of the present invention, the paint coating layer is constituted by the coloring composition and an adhesive that binds it together. Examples of adhesives include water-soluble adhesives such as polyvinyl alcohol, polyvinylhyloridone, carboxymethyl cellulose, oxidized starch, and casein, as well as styrene-butadiene copolymers, acrylic copolymers,
A polymeric adhesive such as an ethylene-vinyl acetate copolymer can be used.

In order to improve the printability and writability of the sheet-like optical recording material of the present invention, it is preferable to include a pigment together with the color forming material in the paint coating layer. Such pigments include clay, calcium carbonate, aluminum hydroxide, silica, satin white, titanium dioxide, talc, barium sulfate, calcium sulfate, calcium sulfite, etc.
Pigments used in ordinary pigment-coated paper can be used, and these may be used alone or in a mixture of two or more.

The color-forming composition is formulated in such a way that the amount of sensitizing dye is 0.00% per mole of photocationic reaction initiator. 1 to 10 mol, preferably 0.
5 to 5 moles, and the coloring pigment is 0.1 to 10 moles,
Preferably it is 0.5 to 5 mol.

The amount of coloring composition and adhesive in the paint coating layer is as follows:
The amount of the adhesive is 50 to 2,000 parts by weight, preferably 100 to 1,000 parts by weight, per 1 mol of the photocationic reaction initiator.
Parts by weight.

In addition, when blending a pigment in order to impart printability, etc., the pigment is added in an amount of 10 to 10 parts by weight of the composition.
000 parts by weight, preferably 50 to 300 parts by weight.

The sheet-like substrate used in the optical recording material of the present invention includes porous substrates such as paper, nonwoven fabric, and cloth, laminated paper, polymer film, metal foil, and the like. These may be used alone or in the form of a stack of these.

In the sheet-like optical recording material of the present invention, the coating RFI layer may not contain a reaction accelerator, a reaction modifier, a leakage agent, a film-forming agent, a diluting solvent, etc., as long as the purpose of use is not impaired. Good too.

In order to form a coating layer containing a color-forming composition on a sheet-like substrate, a coating solution having a predetermined composition is applied according to a conventional method.
It may be applied onto a sheet-like substrate using a roll coater or the like, and then dried and cured. Further, as long as the quality of the formed paint coating layer is not impaired, drying and curing may be carried out using an ultraviolet curing device or an electron beam curing device.

As the laser light source according to the present invention, an argon ion laser, a helium-cadmium laser, a krypton ion laser, a helium neon laser, a semiconductor laser, etc. can be used.

The sheet-like optical recording material according to the present invention can directly record an image by irradiating it with a laser beam from a laser printer. Furthermore, the sheet-like optical recording material according to the present invention can provide clear prints or printed images.

〔Example〕

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

Example 1 NK-1056 (Japan), a cyanine dye, was added as a sensitizing dye to 1 mole of 4,4'-di-tert-butyl-diphenyliodonium fluoroantimonate, which is a halogenated diphenyl salt, as a photocationic reaction initiator. (manufactured by Photosensitive Color Research Institute) 1 mol, truffle as a coloring pigment
One mole of crystal violet lactone, an enylmethane phthalide dye, was dispersed and dissolved in methyl ethyl ketone, and an acrylic copolymer LR-347 (manufactured by Mitsubishi Rayon Co., Ltd.) was added as an adhesive to initiate a photocation reaction. Add 200 parts by weight to 1 mole of the agent to prepare a coating solution.

On the other hand, plywood paper (thickness 110 μm, trade name: "YUPO FPG-110J, manufactured by Oji Powder Paper Co., Ltd.)" was used as a sheet-like substrate, and the above coating solution was coated with a roll coater at a coating amount of 5 g/m.
(solid content) and dried at 100°C for 2 minutes.

When the surface of the paint coating layer of the sheet-like optical recording material thus obtained was irradiated with a laser beam from an argon ion laser according to a predetermined image pattern, a good blue recorded image was obtained.

Example 2 For 1 mol of iodoform, an organic halogen compound, as a photocationic reaction initiator, 1 mol of thiomichler ketone, a thiobenzophenone dye, as a sensitizing dye, and ○DB, a fluoran dye, as a coloring dye. Yamamoto Kaoru Co., Ltd.) 1 mole was dispersed and dissolved in methyl ethyl ketone, and further mixed and dispersed with 100 parts by weight of precipitated calcium carbonate per 100 parts by weight of this blend. Similarly, 500 parts by weight of an acrylic copolymer adhesive (trade name: "Coponil 4025J, manufactured by Nippon Goo Kagaku Kogyo Co., Ltd.") was added to prepare a coating solution.

On the other hand, a PET film (thickness 50μ
> using a roll coater to apply the above coating solution to a coating amount of 5g.
/m2 (liQ type) and dried at 100°C for 2 minutes.

When the coating layer of the sheet-like optical recording material thus obtained was irradiated with a laser beam from a semiconductor laser light source (oscillation wavelength: 780 nm) according to a predetermined image pattern, a good black recorded image was obtained. It was also possible to print using normal offset printing or office writing instruments.

(Effects of the Invention) The sheet-like optical recording material of the present invention can directly obtain a good recorded image by irradiating it with a laser beam from a laser light source, and does not require development or fixing operations.

Claims (1)

[Claims] 1. A sheet-like optical recording material, characterized in that a paint coating layer containing a photocationic reaction initiator, a sensitizing dye, and a coloring dye as main components is provided on at least one surface of a sheet-like substrate.