JPS62242575A - Recording material and recording method using the same - Google Patents

Abstract

PURPOSE:To provide a moderate surface luster and record images with excellent image density, by setting the void ratio of an ink-transporting layer to within a specified range and setting the thickness of the layer to be not less than a specified value. CONSTITUTION:In use of a recording material, images are recorded in an ink on an ink-transporting layer provided on the recording side, and are observed from the side of an ink-holding layer provided on the observing side. The ink- transporting layer has a void ratio of 0.20-0.75 and a thickness of not less than 2mum, permits liquids to penetrate therethrough, and has the function of rapidly absorbing the ink adhered to the surface thereof and permitting the ink to penetrate therethrough. The ink-holding layer functions to absorb and hold the ink or a recording agent transferred from the ink-transporting layer. To regulate the liquid permeability of the ink-transporting layer, the layer is provided with a porous structure comprising appropriate cracks or open cells therein. An ink-absorbing effect decreases with a decrease in the number of the cracks or open cells in the ink-transporting layer. A higher void ratio causes a lowering in image quality and, further, makes it impossible to form the ink-transporting layer.

Description

[Detailed description of the invention]

(Field of industrial use) Unreleased II is used for felt pens, fountain pens, pen plotters,
Recording materials suitable for recording methods using ink such as inkjet recording devices, especially recording materials with excellent ink absorption and coloring of recorded images, and high-quality recorded images! Concerning recording methods for (Prior Art) Conventionally, recording methods using ink, such as writing with a fountain pen, felt-tip pen, ballpoint pen, etc., pen plotter,
The recording material used for recording with an inkjet recording device or the like is general paper such as high-quality paper, bond paper, writing paper, or art paper. Examples include coated paper such as cast coated paper. However, in recent years, with the development of recording Il''IQ of inkjet recording devices, pen plotters, etc., sufficient recording characteristics cannot be obtained with the above-mentioned conventional recording materials.In other words, with the recent recording methods such as those described above, , because high-speed recording and multi-color recording are performed that are incomparable to conventional methods.
With conventional recording materials, ink absorption, color development when a plurality of inks are attached to the same cylinder, chromaticity, etc. have not reached a satisfactory level. In order to solve these problems, coated paper having a porous ink-absorbing layer on the surface of the base material, such as inkjet paper, has been devised.
JP-214989 discloses a sheet having a porous ink-absorbing resin layer provided on a base material. This ink absorption layer is porous and contains pores and cracks inside, which improves the ink absorption speed. In this way, by providing a porous ink absorption layer,
Although it is possible to increase ink absorption to some extent,
Since the absorbing layer is porous, the recording material has light scattering properties, making it impossible to obtain clear recorded images with high optical density and glossy recorded images. In addition, since the recorded image is transferred from the ink recording surface, the recording agent is left on the surface of the absorbing layer as much as possible, which is said to result in poor durability such as water resistance and abrasion resistance of the image, as well as storage stability. There are drawbacks. One known method for solving this problem is a recording medium disclosed in, for example, Japanese Patent Laid-Open No. 136480/1983. This recording medium has at least one highly white ink-receiving layer provided on a support, and the formed image is observed from the support. In this method, various performances such as water resistance on the viewing surface have been sufficiently resolved, but a warm pigment is used to increase the whitening of the ink-receiving layer, and as a result, although whitening is high,
The attached ink is adsorbed by the pigment, and fewer ink particles reach the interface between the ink-receiving layer and the support, making it impossible to increase the image density on the viewing surface to 1 min, and also reducing the color quality. The disadvantage is that the resolution is also inferior. In addition, recently, as the speed and quality of recording using inkjet recording devices, pen plotters, etc. has increased, there has been a demand for recording materials with dramatic recording performance. In other words, there is a need for recording materials that are significantly superior to conventional recording materials in all aspects of recording performance, including ink absorption, recording agent color development, recorded image quality, resolution, color, recorded image density, and gloss. It's here. As a result of research in order to provide a recording material as described above, the present inventor has discovered a material having a specific structure, which has a liquid-permeable ink transport layer and an ink retention layer, and in which the recording surface and the image observation surface are in a front-back relationship. I previously suggested recording materials. However, in the recording materials of these prior inventions,
The correlation between various required performances such as the ink absorbency and strength of the formed ink transport layer, the relationship with the ink holding layer, and the relationship with the quality of the formed image is not clear, and there is no certain divine performance direction]
For example, if the thickness of the ink transport layer is increased to improve ink absorption, the per-image resolution may decrease, and if the layer is made thin, the resolution may decrease. If too many particles are added, cracks will occur in the ink transport layer and powder will fall off too much, and if too few particles are added, the ink absorption will be insufficient. occured. Therefore, the above-mentioned recording material exhibits excellent ink absorption, water resistance, blocking resistance, etc. during recording, and after recording, image quality such as excellent color, high image density, resolution, etc. There is a need for a recording material that can provide an image having the following characteristics. (Problems to be Solved by the Invention) However, at present, a recording material that simultaneously satisfies all of these recording characteristics has not yet been obtained. Accordingly, one object of the present invention is to provide a recording material that has an appropriate level of gloss on one surface and allows a recorded image with excellent image density to be obtained. A further object of the present invention is to provide a recording material from which recorded images can be obtained that are excellent in water resistance, abrasion resistance, storage stability, visibility, and the like. Still another object of the present invention is to provide a recording method that allows the above-mentioned high-quality recorded images to be easily obtained. The objects mentioned above are achieved by the present invention as follows. (Means for Solving the Problems) That is, the first aspect of the present invention is a recording material having an ink transport layer and an ink retention layer, wherein the ink transport layer has a porosity of 0.20 to 0. 75, and the thickness of the ink transport layer is 2 μm or more. Furthermore, a second aspect of the present invention is a recording method for recording with ink on the recording surface of a recording material having an ink transport layer and an ink holding layer, the porosity of the ink transport layer of the recording target being is 0.20 to 0.75,

This recording method is characterized in that the thickness of the ink transport layer is 2 μm or more. Note that the porosity (A) of the ink transport layer in the present invention is
'' refers to the value expressed by A=(V2-Vl)/V2, where v2 is the apparent volume of the ink transport layer and Vt is the true volume. Specifically, an ink transport layer is formed on the surface of a substrate 1 that does not absorb solvents, such as a glass plate or aluminum foil, the apparent volume v2 is measured from the thickness and area, and then the ink transport layer is Ink transport layer authentic MiV using an inert solvent (e.g. benzene, ethanol etc.)
It can be calculated by measuring t. As a result of intensive research in order to resolve the unclear points of the prior invention as described above, the present inventors have found that the transparency of the recording material, in which recording is performed from the ink transport layer and one image is observed from the back side, has been improved. The porosity of the formed ink transport layer is the most important factor for ink absorption and image quality after recording.
The porosity is set within a certain range, i.e., 0.2
By setting the thickness of the ink transport layer to 21 Lm or more, it is possible to achieve both excellent ink absorption during recording and excellent image quality after recording. The present invention was completed by discovering that this can be done. (Function) The recording material of the present invention is different from conventional recording materials in which the recording surface and the viewing surface are the same, and the recording surface and the viewing surface are in a front-back relationship. That is, in the recording material of the present invention, recording is basically performed using ink on the ink transport layer, which is the recording side, and the recorded image is observed from the ink retaining layer side, which is the observation side. The ink transport layer, which is the first feature of the present invention, has liquid permeability and has the function of quickly absorbing and transmitting ink attached to its surface, while the ink retaining layer transfers the ink from the ink transport layer. It has the function of absorbing and retaining ink or recording material. At this time, the ink transport layer must have high affinity for the liquid medium in the ink, and at the same time, the recording agent (dye,
On the contrary, it must have a low affinity for colorants such as pigments and color-forming materials I'l). Therefore, for the ink transport layer, a material 1 is selected that has properties such as wetting, penetration, and diffusion for the ink medium, but does not have properties such as adsorption, penetration, and reaction for the recording material. Must be configured. The above effect 1- can be achieved by adjusting the porosity of the ink transport layer in the range of 0.20 to 0.75 and setting the thickness of the ink transport layer to 2 gm or more in the recording material of the present invention. It is suitably demonstrated. The ink retaining layer, which is the second feature of the present invention, must have a stronger ability to absorb ink than the ink transport layer in order to stably absorb and capture the ink temporarily absorbed by the ink transport layer. Therefore, the ink retaining layer must have high affinity for the recording agent as well as for the ink medium. Hereinafter, the present invention will be explained in more detail based on preferred embodiments. The recording material of the present invention includes a base material as a support, and a material that substantially absorbs ink or recording agent formed on the material.
The ink retaining layer captures the ink, and the ink transport layer formed on the ink retaining layer-1- directly receives the ink, has liquid permeability, and leaves substantially no recording material. However, if the ink transport layer or the ink retention layer also functions as a base material, the base material is not necessarily required. As the base material used in the present invention, any conventionally known base material can be used, specifically, polyester resin, diacetate resin, and triacetate resin. Polystyrene resin, polyethylene resin, polycarbonate resin, polymethacrylate resin, cellophane, celluloid, polyvinyl chloride resin, polyvinylidene chloride resin,
Examples include plastic films such as polyimide resin, plates, glass plates, and the like. The thickness of these base materials may be any thickness, but generally, the thickness is between 1 m and 5,000 pLm.
That's about it. As described above, in the present invention, the recorded image is recorded from the side opposite to the recording side m1! Therefore, the base material needs to have translucency. Furthermore, as long as the base material to be used finally has translucency, any addition may be applied to the base material. For example, a desired pattern, an appropriate gloss, or a set Furthermore, by selecting a material that has water resistance and abrasion resistance, it is possible to add water resistance and abrasion resistance to the image observation surface of the recording material. You can also. The ink transport layer forming the recording material of the present invention is as follows. In order to exhibit appropriate liquid permeability, it is necessary to have a porosity of 0.20 to 0.75 and a thickness of 21 Lm or more.
Appropriate liquid permeability as used in the present invention refers to a property that allows ink to pass through the ink holding layer in accordance with the ink absorbency thereof, and does not substantially leave the recording agent in the ink within the ink transport layer. A desirable aspect for adjusting the liquid permeability of the layer is to form a porous structure having appropriate cracks and communicating pores inside the ink transport layer. Further, as described above, in the present invention, in order to observe a reflective recorded image from the opposite side of the recording surface, it is preferable that the ink transport layer has light scattering properties. The ink transport layer that satisfies the characteristics described in item 1-1 is preferably composed mainly of particles that are non-stainable to the recording material and a binder. Such particles include the recording agent in the ink, that is,
Any particles may be used as long as they do not substantially adsorb dyes, etc. Particularly suitable particles in the present invention include highly hydrophobic thermoplastic resins, thermoplastic resins, etc., since dyes in inks are generally water-soluble. 4441 pigments such as curable resins, e.g. polystyrene, polymethacrylates, elastomers,
Ethylene-vinyl acetate composite, styrene-acrylic composite, polyester, polyacrylic, polyvinyl ether, polyamide, polyolefin, guanamine, SBR
': At least one of the resin powders of J and their emulsions and suspensions may be used as desired. Further, in order to increase the degree of ink transport layer, white inorganic pigment 1 may be added to an extent that does not impede the ink permeability of the ink transport layer. Furthermore, the binder used has the function of binding the particles to each other and/or to the ink retaining layer, and is preferably non-staining to the recording material like the particles. . Any material that is preferable as a binder may be any conventionally known material as long as it has the functions described in 1iij, such as polyvinyl alcohol, acrylic resin, styrene-acrylic copolymer, ethylene-vinyl acetate. Copolymers, starches, polyvinyl butyral, gelatin, casein, ionomers. One or more resins such as gum arabic, carboxymethyl cellulose, polyvinylpyrrolidone, polyacrylamide, phenol, melanin, epoxy, styrene-butadiene rubber, urea resin, phenol resin, α-olefin resin, chloroprene, nitrile rubber, etc. can be used as desired. . Furthermore, in order to enhance the function as an ink transport layer, various additives such as surfactants, penetrants, etc. may be added to the ink transport layer as necessary. The mixing ratio (by weight) of the particles and the binder is preferably in the range of particles/binder = 1/3 to 50/1, more preferably in the range of 3/l to 20/l. It is. If there is too much binder in this mixing ratio, there will be fewer cracks and communicating pores in the ink transport layer, reducing the ink absorption effect, and if there are too many particles in this mixing ratio, the porosity will be high. However, the image quality deteriorates, and furthermore, the adhesion between the particles or between the ink retaining layer and the particles becomes insufficient, making it impossible to form an ink transport layer. The thickness of the ink transport layer also depends on the ink droplet size, and
r is preferably 2 μm or more, more preferably 3 to 80
It is μm. Next, the non-porous ink retention layer that substantially captures the ink or recording agent absorbs and captures the recording agent in the ink that has passed through the ink transport layer, and substantially permanently retains the recording agent. The ink retaining layer needs to have a stronger ink absorption ability than the ink transport layer. This is because when the absorption power of the ink retention layer is weaker than the absorption strength of the ink transportation layer, the ink applied to the surface of the ink transportation layer passes through the ink transportation layer, and the tip of the ink reaches the ink retention layer. When the ink reaches the ink, the ink stagnates in the ink transport layer, causing the ink to permeate and diffuse laterally within the ink transport layer at the interface between the ink transport layer and the ink retaining layer. As a result, the resolution of the recorded image decreases, making it impossible to form a high-quality recorded image. Furthermore, as mentioned above, since the recorded image is observed from the side opposite to the recording surface, the ink retaining layer must be light-transmissive.
Delicious. The ink retaining layer that satisfies the requirements in item 1- is preferably made of a light-transparent resin that adsorbs the recording agent and/or a light-transparent resin that is soluble and swellable with respect to the ink. For example, when a water-based ink containing an acid dye or a direct dye is used as the recording agent, the ink-retaining layer is made of a resin that is adsorbent to the dye, such as a resin that is swellable to the water-based ink. It is preferable that the ink retaining layer is made of a water-soluble or hydrophilic polymer.The material constituting the ink retaining layer is particularly limited as long as it has the function of absorbing and trapping ink and can form a non-porous layer. It is not something that will be done. The thickness of the ink-retaining layer only needs to be sufficient to absorb and trap ink, and varies depending on the amount of ink droplets, but it is preferable! 504 m to 504 m, more preferably 3 to 20 m
It is μm. The material constituting the ink retaining layer may be any material as long as it can absorb water-based ink and retain the coloring material in the ink, but since the ink is mainly water-based, water-soluble or hydrophilic materials may be used. Examples of such water-soluble or hydrophilic polymers that are preferably formed from polymers include: Albumin, gelatin, casein, starch, cationic starch, gum arabic, natural resins such as alginate sorta, carboxymethylcellulose, hydroxyethylcellulose, polyamide, polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, quaternized polyvinylpyrrolidone, polyvinylbilicylium halide, Synthetic resins such as melamine resin, phenol resin, alkyd resin, polyurethane, polyvinyl alcohol, ion-modified polyvinyl alcohol, polyester, and sodium polyacrylate, preferably hydrophilic polymers made by crosslinking these polymers to make them water-insoluble. Examples include a hydrophilic [[water-insoluble polymer complex] consisting of the polymer 1-, a hydrophilic 1-water-insoluble polymer having a hydrophilic segment, and the like. ), (As a method for forming an ink retaining layer and an ink transport layer on a material, a coating solution is prepared by dissolving or dispersing the materials preferably mentioned above in a suitable solvent, and the coating solution is For example, it is preferable to apply the coating to the base material L- by a known method such as a roll coating method, a lot bar coach ink method, or a spray coating method. 1 by hot melt coating method or from the above materials,
A conventional method may also be used in which a single sheet is formed and the sheet is laminated onto a base material. However, when providing the ink retaining layer on the base material I-, it is preferable to strengthen the adhesion between the base material and the ink retaining layer by, for example, forming an anchor coat layer, and to eliminate spaces. If a space exists between the base material and the ink retaining layer, the surface of the recorded image will reflect diffusely, which will substantially lower the optical density of the image, which is not preferable. Examples of child actors that record images using the recording material of the present invention include fountain pens, ballpoint pens, felt pens, and pen plotters.
, ink mist, inkjet, various types of printing, and other recording devices and recording apparatuses that use ink containing a recording agent. From the viewpoint of high-speed image recording, inkjet recording devices and pen plotters are suitable. The ink used in the recording method for unreleased IJ1 can be a conventionally known water-based and/or oil-based ink, but in order to quickly penetrate the ink transport layer and be quickly absorbed and captured by the ink retention layer, The ink viscosity is 500
It is necessary that it is less than cps. Preferably, the viscosity is less than 100 cps, preferably less than 50 cps. In addition, water-based inks are preferable in consideration of safety against fire and stain resistance against the environment. As the recording agent contained in the ink, conventionally known coloring agents such as dyes and pigments and/or materials having color-forming properties can be used.For example, recording agents used in inkjet recording include direct dyes, basic dyes, etc. Water-soluble dyes such as , reactive dyes, and food colorings are preferred. In the recording method of the present invention, when printing one character, since the recording surface and the viewing surface are in a front-back relationship. Unlike conventional methods, it is necessary to use a device that can print mirror letters. However, in the recording material of the present invention, the ink transport layer can also be made transparent by heating after recording, and in such a case, the recording surface can also be used as an observation surface at the same time. Therefore, in such a case, characters etc. may be recorded in a normal state. (Examples) Hereinafter, the present invention will be specifically described based on Examples. Note that % or parts in the text are based on weight criteria unless otherwise specified. Example 1 A polyethylene terephthalate film (thickness 100 μm, manufactured by Toshi) was used as a translucent base material, and the following composition A was coated on this film using a bar coater method so that the dry film thickness was 4 μm. Then, it was dried in a drying oven at 120°C for 5 minutes. Polyvinylpyrrolid 7 (PVPK-i9G, manufactured by GAF, 10% DMF solution) 88
12 parts of novolac type phenol 4!11111 (Regitop PSK-2320, n-'x: chemical 1to%, ONF solution) Furthermore, the following composition B was added thereon so that the dry film thickness was 2.0 μm. It was coated using a bar coater υS and dried in a drying oven at 80°C for 10 minutes. 1 place 1 J Low density polyethylene resin (Chemi Pearl N-200 manufactured by Mitsui Petrochemical Industries, solid content 40%) 100 parts ethylene
110 parts of vinyl acetate copolymer resin (Chemipar V-100, manufactured by Ei Petrochemical Co., Ltd., solid content 40%) 0.5 parts of polyoxyethylene octylphenyl ether (Emulken 810, manufactured by Kao) The recording material of the present invention is white and opaque1) and has the following characteristics. Ink transport layer film thickness: 2.0 μm Ink transport layer porosity: 0.20 Example 2 In Example 1, the dry film thickness of composition B was 10, and the OIL
A white opaque recording material of the present invention was obtained in the same manner as in Example 1, except that it was coated so as to obtain m. Ink transport layer thickness: 10.0 μm Ink transport layer porosity: 0.20 Example 3 The same polyethylene terephthalate film as in Example 1 was used as the light-transmitting base material, and the following composition was applied to the smooth surface -L of this base material. Product C was coated using a bar coater method to give a dry film thickness of 44 m at 110°C. It was dried in a drying oven for 10 minutes. Kokamono S polyvinyl pyro IJ ton (PVPK-80, made by GaP,
10% DNF solution) 84 parts styrene/acrylic acid resonance body (Oxirac SH-2
100, Kuchimoto Shokubai Kagaku Chi, 10% Mouth MF solution) 16 parts and then the following composition to give a dry film thickness of 2. Coated by bar coater method to obtain Op, m, 100℃, 1
Dry in a drying oven for 0 minutes. 1 imaginary 1" Polystyrene resin (L-8801, Asahika 1&, I, solid content 48%) 100 parts Ionomer resin (Chemipearl SA-100, manufactured by Mikata Petrochemical Industries, solid content 35%) 13 parts Sodium dioctyl sulfate 0.15 parts of fusuccinate (Perex 0T-P, Kakochi, solid content 70%) The recording material of the present invention thus obtained was white and opaque. Ink transport layer film thickness: 2.0 m Final ink transport layer porosity: 0.54 Example 4 In Example 3, the film thickness of the ink transport layer was 10, 0 m.
A white opaque recording material of the present invention was obtained in the same manner as in Example 3, except for the following. Ink transport layer film thickness: 10.0 final m Ink transport layer porosity: 0.54 Example 5 The polyethylene terephthalate film used in Example 1 was used as a translucent base material, and the following composition A was applied onto this base material.
was coated using a bar coater method to a dry film thickness of IO μm, and dried in a drying oven at 100° C. for 12 minutes. Kokamono J Comb-shaped polymer (25% methyl cellosolve solution) 60 parts Methyl vinyl ether/maleic anhydride monoethyl ester (Gantrez ES-425, manufactured by GaP, 1
0% water/ethanol solution) 40i,
The above comb-shaped polymer is a combination of 20 parts of methyl methacrylate macromer to 80 parts of main E (a copolymer of 64 parts of 2-hydroxyethyl methacrylate and 16 parts of dimethyl acrylamide). The following Composition F was applied thereon by a bar coater method to a dry film thickness of 2.OILm, and dried in a drying oven at 70°C for 10 minutes. 1000sD, Soken Chemical Co.) 100f'll Ionomer resin (Chemivar 5A-100, Mikata Petrochemical Industry Chi, solid content 35%) 25 parts polyoxyethylene (Emulgen A-500, Kako Co., Ltd.)
0.3 parts water
20 parts The thus obtained recording material of the present invention was white and opaque. Ink transport layer thickness H2, 0 μm Ink transport layer porosity, 0.75 Example 6 In Example 5, the ink transport layer thickness was 10.0 μm.
A white, opaque recording material of the present invention was obtained in the same manner as in Example 5 except for the following. Ink transport layer thickness, IO, 0 m Ink transport layer porosity - 0,75 Comparative Example 1 The same procedure as Example 2 was carried out except that 1 composition B in Example 2 was changed to the following composition G. A white and opaque recording material of a comparative example was obtained. Ink transport layer thickness: 10.0 μm Ink transport layer porosity: 0.18 Composition G Low-density polyethylene resin (Chemipart 200° manufactured by Shogatsu Petrochemical Co., Ltd., solid content 40%) 100Fm ethylene-vinyl acetate copolymer resin ( Chemipearl V-200, manufactured by E-kata Petrochemical Industries, IJJ type 40%) 150 parts Polyoxyethylene octylphenyl ether (manufactured by Epurgen 81O1 Kacho) 0.6 parts Comparative Example 2 In Example 1, the film of the ink transport layer A white opaque recording material of a comparative example was obtained in the same manner as in Example 1 except that the thickness was 1.8 gm. Ink transport layer thickness: 1.8 final m Ink transport layer porosity: 0.20 Comparative Example 3 The same procedure as in Example 3 was carried out except that the thickness of the ink transport layer was 1.8 μm. White F'1! A comparative example recording material of N-light was obtained. Ink transport layer thickness: 1.8 ILm Ink transport layer porosity: 0.54 Comparative Example 4 In Example 5, the ink transport layer thickness was 1.8 ILm.
A white opaque recording material of a comparative example was obtained in the same manner as in Example 5 except that Ink transport layer film thickness: 1.8 final m Ink transport layer porosity: 0.75 Comparative Example 5 The same procedure as Example 6 was carried out except that composition F in Example 6 was changed to composition H below. A white and opaque recording material of a comparative example was obtained. Ink transport layer thickness; IO, OILm Ink transport layer porosity, 0.77 Composition H Acrylic ultrafine powder (+ (MP-1000SD, Soken Kagaku 9s) 100 parts Ionomer resin (Chemi Pearl S^-100, Mikata Petrochemical) Industrial product, solid content 35% > 15 parts polyoxyethylene (Emulgen A-500, Kajo Co., Ltd.)
0.3 parts water
Part 2o Example 7 and Comparative Example-1-The following four types of ink were used to form bubbles with a heating resistor on the recording materials of the Example and Comparative Example.
Solid inkjet recording was performed using a recording device having an on-demand type inkjet recording system that generates pressure and ejects ink using the generated pressure. The compositions of the four types of inks used are shown below, and the recorded matter thus obtained was tested and evaluated in accordance with the following method to determine whether they were sufficiently suitable for the purpose of the present invention. The evaluation results are shown in Table 1 below. Sako U (composition) c, [,7 Sifted Yellow 23 2 parts diethylene glycol 15 parts water
85 parts Licozl (composition) C, 1, Acid Red 92 2 parts diethylene glycol 1 s m water
85 parts 1 soil U (composition) C, 1, Direct Blue 86 2 parts diethylene glycol 15 parts water
85 parts 1 work 2 no (group IJt,) C, 1, Direct black 19 2 parts diethylene glycol 1s PII water
85aB (1) Ink absorption after inkjet recording. The recorded matter was left at room temperature, and the time required for the ink to sufficiently dry and fix without adhering to the finger even when the recorded area was touched with a finger was measured. (2) Image optical density (0,0,) is Macbeth C degree meter T
Image observation side A for black ink recording area using R524
and measured from recording surface B. (3) The dot shape is determined by observing the printed dots with a stereomicroscope.
, Irregular shapes were marked as ×. (4) The degree of bleeding was determined by measuring the diameter of the printed dot using a stereomicroscope, and was expressed by whether the diameter of the printed dot was the same as that of the ink droplet. (5) Color! ! t# Brightness is determined by comparing the color sharpness of the inkjet recorded image using 11 views, and selecting the best one as B1.
The worst one was marked as ×, and the results were ranked as Olo, Δ, and ×. A comprehensive evaluation was made based on the above results. The results are shown in Table 1. In addition, in the overall evaluation, the ink absorption is quick, the suitability for inkjet recording is excellent, the glossiness of the image viewing surface, the image density, the resolution, the color quality, and the operability during image creation are good. 0, inkjet suitability, image V & detection image 1 among density, resolution, color quality,
In addition, if there were still some defects, it was marked as ×. (Effects) The recording material of the present invention configured as described above, like ordinary paper, can print a recorded image from the side recorded with ink.
Although it is not impossible to detect the recorded image from the side opposite to the recording surface, that is, from the ink retaining layer or substrate side,
81, it has excellent effects that could not be obtained with conventional methods. That is, since the ink retaining layer has translucency,
Diffuse reflection on the image viewing surface is reduced, and a high image optical density that cannot be achieved when recording with ink on a porous sheet such as paper can be obtained. In addition, the ink transport layer serving as the recording portion has an appropriate thickness,
[By including cracks and communicating pores with appropriate porosity, the liquid permeability of the ink transport layer is suitably controlled, and the ink absorbency and density of the recorded image are adjusted to -1, sharpness, and resolution. , it is possible to provide images with excellent color properties and the like. Furthermore, when a translucent base material is used as the base material, in addition to the above-mentioned effects based on the light transmittance of the base material, the recorded image has gloss, water resistance, weather resistance, and abrasion resistance. Attached, to be done. The recording material of the present invention is significantly superior to the conventional method of laminating a transparent film on the surface of the recorded image in terms of the optical density of the recorded image and the operability when creating the recorded image. . (Left below) -n% 1 2 and Niko and Mukuko Gamble Hiroto 0.20 0.20 G,
54 0.54 0.75 0.75iy'-,
-m 2.0 1G, 0 2.0 10.
0 2.0 10.0 Technique
15 10 10 5 8 3 strokes JL
L1” 1 degree A 1.41 1.22 1.
48 1.19 1.44 1.11B
1.03 G, 80 1.10
0.74 1.05 0. B1 neem "2" L lin
0 Δ OΔ OΔDou-ichi”L-Once
4.8 4.0 4.1 3.5 3.
3 2.7'l/lL standing 000000 : i o o o o o o
. = Old JJL 1 Z Dan 4 All 4y9'bet,' 0.18 0.20
0.54 0.75 0.7finl)',
, m +0.0 1.8 1.8
1.8 1G, 0Cy9 Row L40
45 40 35 5-cho i and 1'' 1ro A O, 871, 231, 251, 14
0.58B 0.66 1.14
1.10 0.95 0.55 balls × Δ Δ Δ ×
Iwao--JL--Melon 4.4 5.0 4
．． 7 3.9 2.1 animal 2m standing Δ
× Δ × ΔRainbow-U-Value
xxxxxx Patent applicant: Canon Co., Ltd. 6] - n/n 1 person V interdict procedure Ne city official letter (spontaneous) October 2, 1986

Claims (12)

[Claims] (1) A recording material having an ink transport layer and an ink retention layer, wherein the ink transport layer has a porosity of 0.20 to 0.
．． 75, and the thickness of the ink transport layer is 2 μm or more. (2) The recording material according to claim (1), wherein the ink transport layer and the ink retention layer are laminated on a base material. (3) The recording material according to claim (2), wherein the base material is translucent. (4) Claim No. 2, wherein the ink transport layer is porous (
The recording material described in item 1). (5) The ink transport layer is mainly composed of particles that do not stain the recording material and a binder.
The recording material described in item 1). (6) The recording material according to claim (1), wherein the ink retaining layer is non-porous. (7) The recording material according to claim (1), wherein the ink retaining layer is mainly composed of a water-soluble or hydrophilic polymer. (8) The ink transport layer is light-dispersing, and the ink retaining layer is more light-transmissive than the ink transport layer.
The recording material described in item 1). (9) The recording material according to claim (1), wherein the ink retaining layer has a stronger ink absorption ability than the ink transport layer. (10) The recording material according to claim (1), wherein the ink transport layer has communication holes. (11) The recording material according to claim (1), wherein the ink transport layer includes cracks. (12) A recording method for recording with ink on the recording surface of a recording material having an ink transport layer and an ink holding layer, wherein the porosity of the ink transport layer of the recording material is 0.20.
0.75 and the thickness of the ink transport layer is 2 μm
A recording method characterized by the above.