JPS62242576A - 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 to within a specified range the void ratio of an ink- transporting layer in which the weight ratio of particles non-dyeable with a recording agent to a binder is set in a specified range. 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 comprises particles non-dyeable with a recording agent and a binder as main constituents, in a weight ratio of the particles to the binder of 1/3-30/1, has a void ratio of 0.20-0.75, 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 the recording agent transferred from the ink-transporting layer. If the quantity of the binder is excessively large, the number of cracks or open cells in the ink- transporting layer is reduced, and an ink-absorbing effect is reduced. If the quantity of the particles is excessively large, though the void ratio is raised, image quality is lowered, and the strength of the ink-transporting layer is lowered or it is impossible to form the film of the layer.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to recording materials suitable for recording methods using ink, such as felt-tip pens, fountain pens, pen plotters, and inkjet recording devices, particularly those having an ink-absorbing property. The present invention also relates to a recording material with excellent color properties of recorded images and a recording method for obtaining high quality recorded images.

(Prior Art) Conventionally, recording methods using ink, such as writing with a fountain pen, felt-tip pen, ballpoint pen, etc., pen plotter,
Examples of the recording material used for recording with an inkjet recording apparatus include general paper such as high-quality paper, bond paper, and writing paper, and coated paper such as art paper and cast coated paper.

However, in recent years, inkjet record M! With the development of recording equipment such as aZl and pen plotters, sufficient recording characteristics cannot be obtained with the above-mentioned conventional recording materials.

In other words, in recent recording methods such as those described above, 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, monochromaticity, 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.
In Japanese Patent No. 214989, two companies have produced sheets in which a porous ink-absorbing resin layer is 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 absorption layer is porous, the recording material has light diffusing properties, making it impossible to obtain clear recorded images with high optical density and glossy recorded images.

In addition, since the recorded image is observed from the ink recording surface, the recording agent is configured to remain as much as possible on the surface of the absorbing layer, which has the disadvantage that the durability and storage stability of the image, such as water resistance and abrasion resistance, are inferior. There is.

As one method for solving such problems, a recording medium disclosed in, for example, Japanese Unexamined Patent Publication No. 136480/1980 is known. 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 large amount of pigment is used to increase the whitening of the ink receiving layer, and as a result, although the white color is high,
The adhered ink is adsorbed by the pigment, and the amount of ink reaching the interface between the ink receiving layer and the support is reduced, making it impossible to make the image density on the viewing surface sufficiently high, and also reducing the color quality. The disadvantage is that the resolution is also inferior.

Furthermore, recently, as the speed and quality of recording using interjet 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 a recording material that is significantly superior to conventional recording materials in all aspects of recording performance, including ink absorption, recording agent color development, uniformity of recorded images, resolution, color, recorded image density, and gloss. It has become.

In order to provide the above-mentioned recording material, the present inventor has conducted research and found 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 viewing 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 of the formed ink transport layer, its strength, its relationship with the ink retaining layer, and its relationship with the quality of the formed image, is not clear, and it is difficult to improve certain types of performance. 0 For example, if the thickness of the ink transport layer is increased to improve ink absorption, the image density will decrease, and if it is too thin, the resolution will decrease. Too many particles may cause cracks in the ink transport layer or severe powder fall-off, while too few particles may cause various problems such as insufficient ink absorbency.

Therefore, the above-mentioned recording materials exhibit excellent ink absorption, water resistance, blocking resistance, etc. during recording, and after recording, they exhibit image quality such as excellent color, high image density, and resolution. There is a demand for a recording material that can provide an image that has the same characteristics as those described above.

(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.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a recording material that has an appropriate gloss on its surface and allows recording images 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.

Another object of the present invention is to provide a recording method that can easily produce high-quality recorded images.

The above object is 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 is non-stainable to the recording agent. particles and a binder, the weight ratio of the particles to the binder is in the range of l/3 to 30/l, and the porosity of the ink transport layer is in the range of 0.20 to 0.20/l. 75.

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, wherein the ink transport layer is in contact with the recording material. It is mainly composed of non-staining particles and a binder, and the weight ratio of the particles to the binder is in the range of 1/3 to 30/1,
The recording method is also characterized in that the ink transport layer has a porosity of 0.20 to 0.75.

In addition, in the present invention, the "porosity (A)" of the ink transport layer is
'' refers to the value expressed by A=(V2-Vl)/V2, where v2 is the apparent volume of the ink transport layer and Vl is the true volume.

Specifically, an ink transport layer is formed on the surface of a substrate that does not absorb solvents, such as a glass plate or aluminum foil, and its apparent volume v2 is measured from the thickness and area. True body avt of the ink transport layer using an inert solvent (e.g. benzene, ethanol etc.)
It can be calculated by measuring.

As a result of intensive research in order to solve the unclear points of the prior invention as described above, the present inventor discovered that a transparent base material is used for recording materials in which recording is performed from the ink transport layer and images are observed from the back side. The formation of the ink transport layer from a specific proportion of particles and binder and the porosity of the ink transport layer are most important for the film strength, ink absorption, and image quality after recording of the ink transport layer. These are important factors, and the ratio of the particles to the binder and the porosity of the formed ink transport layer are determined within a certain range, that is, from 1/3 to 30/l and from 0.20 to 0. By setting the range to .75,
The present invention was completed based on the finding that it is possible to achieve both excellent ink absorption during recording, excellent image quality after recording, and film strength of the ink transport layer before and after recording.

(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 viewing side.

The ink transport layer, which is the first characteristic of the present invention, is formed mainly of one particle and a binder, has liquid permeability, and has the function of quickly absorbing ink attached to its surface and passing it through 'If1. On the other hand, the ink retention layer has a function of absorbing and retaining ink or recording material transferred from the ink transport layer.

At this time, the ink transport layer must have high affinity for the liquid medium in the ink.

On the contrary, it must have a low affinity for recording agents (dyes: (coloring agents such as pigments and materials with color-forming properties).

Therefore, the ink transport layer is constructed by selecting a material 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. There must be.

The above-mentioned effects are achieved by forming the ink transport layer in the recording material of the present invention from particles and binder at a weight ratio of 1/3 to 30/l, and reducing the porosity of the ink transport layer to 0. .20
It is suitably exhibited by adjusting to a range of -0.75.

Unreleased l51t - The second characteristic is that the ink retention layer stably absorbs the ink temporarily absorbed by the ink transport layer.
In order to capture the ink, the absorbency for the ink must be stronger than 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 the base material.
2. substantially absorbs the ink or recording material formed in the
an ink retaining layer for trapping; and an ink retaining layer formed on the ink retaining layer;
The MII is composed of an ink transport layer that directly receives ink, has liquid permeability, and leaves virtually no recording material behind.

However, if the ink transport layer or the ink retention layer also serves 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, and specifically, polyester resin, diacetate resin, triacetate resin, polystyrene resin, polyethylene resin, polycarbonate resin, polymethacrylate resin, cellophane, celluloid. Examples include plastic films, plates, and glass plates such as polyvinyl chloride resin, polyvinylidene chloride resin, and polyimide resin. The thickness of these base materials may be any thickness, but is generally about Ig,m to 5,000 gm.

Note that, as described above, in the present invention, since a recorded image is observed from the side opposite to the recording side, the base material needs to have light-transmitting properties.

In addition, the base material used may be subjected to any processing as long as it ultimately has translucency. For example, the base material may be given a desired pattern, appropriate gloss, or mesh pattern. Is possible. Furthermore, by selecting a base material having water resistance, abrasion resistance, etc., it is also possible to impart water resistance, abrasion resistance, etc. to the image observation surface of the recording material.

The ink transport layer constituting the recording material of the present invention is as follows.

In order to exhibit appropriate liquid permeability and sufficient film strength of the ink transport layer, it is formed from particles and a binder at a weight ratio of l/3 to 30/l, and has voids of 0.20 to 0.75. Appropriate liquid permeability as used in the present invention means that the ink passes through the ink retaining layer in accordance with the ink absorbency, and the recording agent in the ink is substantially absorbed into the ink transport layer. In addition, sufficient film strength of the ink transport layer refers to the property that particles forming the ink transport layer do not fall off during normal handling while having sufficient liquid permeability as described above. A preferred embodiment for achieving both liquid permeability and film strength of the ink transport layer is to adjust the ratio of particles and binder to maintain the film strength of the ink transport layer while maintaining the inside of the ink transport layer. It is to form a porous structure with moderate cracks and pores.

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 diffusing properties.

The ink transport layer satisfies the above characteristics.

Preferably, it mainly consists of particles that do not stain 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., and particularly preferred particles in the present invention are thermoplastic resins with high hydrophobicity, since the dye 4 in ink is generally water-soluble. , organic particles such as thermosetting resins, e.g.
polystyrene.

Polymethacrylate, elastomer, ethylene-vinyl acetate polymer, styrene-acrylic copolymer, polyester, polyacrylic, polyvinyl ether, polyamide,
At least one of resin powders such as polyolefin, guanamine, and SBR, and their emulsions and suspensions may be used as desired. Such resin particles are
Preferably, the particle size is in the range of 0.1 to 100 g,m.

Further, in order to enhance the whiteness of the ink transport layer, a white inorganic pigment may be added to an extent that does not impede the ink permeability of the ink transport layer.

Further, the binder used has a 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.

As the material 4 preferable as a binder, any conventionally known material can be used as long as it has the above-mentioned function, such as polyvinyl alcohol, acrylic resin, styrene, etc.
Acrylic copolymer, ethylene-vinyl acetate copolymer, starch, polyvinyl butyral, gelatin, casein,
Ionomer.

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 improve the function as an ink transport layer, various additives 1 such as surfactants, penetrants, etc. may be added to the ink transport layer as necessary.

The mixing ratio (weight ratio) of the particles and the binder is preferably in the range of 1 particle/binder = l/3 to 30/l, more preferably in the range of 3/1 to 20/l. . 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 particles and the ink retaining layer becomes insufficient, resulting in a decrease in the strength of the ink transport layer and the inability to form a film.

Although the thickness of the ink transport layer depends on the amount of ink droplets, it is preferably 2 μm or more, more preferably 3 to 80 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 stays in the ink transport layer, so that the ink permeates and diffuses laterally within the ink transport layer at the interface between the ink transport layer and the ink retention layer. As a result, the resolution of the recorded image decreases, making it impossible to form a high-quality recorded image.

Furthermore, as described above, since the recorded image is observed from the side opposite to the recording surface, the ink retaining layer is preferably light-transmissive.

An ink retaining layer that satisfies the above requirements is a light-transmitting resin that adsorbs the recording agent and/or is soluble in the ink.
Preferably, it is made of a light-transmitting resin that has swelling properties.

For example, when a water-based ink containing an acid dye or a direct dye is used as the recording material, the ink-retaining layer is made of a resin that has adsorption properties for the dye, such as a water-soluble resin that has swelling properties for the water-based ink. It is preferable that the ink retaining layer is made of a lignophilic polymer.The material constituting the ink retaining layer is not particularly limited as long as it has the function of absorbing and trapping ink and can form a non-porous layer. It's not something you can do.

The thickness of the ink retaining layer may be sufficient as long as it absorbs and captures ink, and although it varies depending on the amount of ink droplets, it is preferably 1 to 501 Lm, more preferably 3 to 2 Lm.
It is 0Bm.

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. Examples of such water-soluble or hydrophilic polymers, which are preferably formed from hydrophilic polymers, include:

Albumin, gelatin, casein, starch, cationic starch, gum arabic, natural resins such as sodium alginate, carboxymethyl cellulose.

Hydroxyethylcellulose, polyamide, polyacrylamide, polyethyleneimine, polyvinylpyrrolidone, quaternized polyvinylpyrrolidone, polyvinylbilicylium halide, melamine resin, phenolic resin, alkyd resin, polyurethane.

Synthetic resins such as polyvinyl alcohol, ion-modified polyvinyl alcohol, polyester, and sodium polyacrylate, preferably hydrophilic polymers made by crosslinking these polymers to make them water-insoluble, and hydrophilic and water-insoluble polymers made of two or more types of polymers. Examples include polymer complexes, hydrophilic and water-insoluble polymers having wood-philic segments, and the like.

As a method for forming an ink retaining layer and an ink transport layer on a base material, a coating solution is prepared by dissolving or dispersing the materials preferably mentioned above in a suitable solvent, and the coating solution is coated with, for example,
Preferably, the material is coated on a substrate by a known method such as a roll coating method, a rot bar coat ink method, a spray coating method, an air knife coating method, etc., and then quickly dried. Alternatively, a method may be used in which a single sheet is first formed from the material and then the sheet is laminated onto a base material.

However, when providing the ink retaining layer on the base material, 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.

Means for recording images using the recording material of the present invention include fountain pens, ballpoint pens, and felt-tip pens.

Examples include recording instruments and recording devices that use ink containing a recording agent, such as pen plotters, ink misters, ink jets, and various types of printing.

Inkjet recording from the viewpoint of high speed image recording! a
A '2t or pen plotter is suitable.

The ink used in the recording method of the present invention can be a conventionally known water-based and/or pongee thread ink, but in order to quickly penetrate the ink transport layer and be quickly absorbed and captured by the ink retention layer, Ink viscosity is 500cp
It must be 5 or less. Preferably, the viscosity is 1
00 cps or less, preferably 50 cps or less.

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. , Reactive Dye 1 Water-soluble dyes typified by food coloring and the like are preferred.

In the recording method of the present invention, since the recording surface and the viewing surface are front and back, when printing one character, it is necessary to use a device that can print the #11 character, unlike the conventional method. However, in the recording material of the present invention, the ink transport layer can be made transparent by heating after recording, and in such a case, the recording surface can also be used as an observation surface. Therefore, in such a case, characters etc. may be recorded in a normal state.

(Examples) Hereinafter, the present invention will be explained in detail based on Examples.
In the text, % or parts are by weight unless otherwise specified.

Example 1 A polyethylene terephthalate film (thickness 100 #Lm, manufactured by Toshi) was used as a translucent base material, and the following composition A was coated on this base material using a bar coater method so that the dry film thickness was 84 m. It was coated and dried in a drying oven at 120°C for 15 minutes.

1 package per place Polyvinylpyrrolid 7 (PVPK-90, GAF!1
! .

10% [1MF solution) 88
W novolak type phenolic resin (Resitop PSK-2
320, Gunei Chemical! 1i110%, DMF solution)
Furthermore, 12 parts of the following composition B was added thereon to a dry film thickness of 1
Coated by bar coater method to 5 parts m and heated at 80°C.
, and dried in a drying oven for 10 minutes.

1 place 1J Acrylic resin (MP-4000SD, Soken Kagaku! 1) 1
00 parts ethylene-vinyl acetate copolymer resin (Chemipearl V-10
0, manufactured by Oui Petrochemical Industries, solid content 40%) 750 parts perfluoroalkyl carboxylate (S-111).

(manufactured by Asahi Glass) 1.3 parts The thus obtained recording material of the present invention was white and opaque.

Examples 2 to 4 White and opaque recording materials of the present invention were obtained in the same manner as in Example 1 except that the following compositions were used in place of composition B in Example 1.

C-shi 2 Acrylic resin (MP-4000S mouth, Soken Kagaku gI) 1
00 parts Ionomer resin (Chemipearl SA-100, manufactured by Mikata Petrochemical Industries, solid content 35%) 286 parts Perfluoroalkylcarboxylic acid is! (S-111.

Asahi Glass 11) 0, 6 parts water
80 parts polymethyl methacrylate resin (Microsphere-Pure, manufactured by Matsumoto Yushi Seiyaku) 100aB ionomer resin (Chemipearl SA-100, manufactured by Mikata Petrochemical Industries, solid content 35%) 29 parts perfluoroalkyl carboxylate (S-111) , manufactured by Asahi Glass)
0.45 parts water
40 parts polyethylene resin (w-to
o, manufactured by Mikata Petrochemical Industry, solid content 40%)
100 parts styrene-butadiene copolymer resin (L-1
838, manufactured by Asahi Kasei, solid content 48%) 7 parts perfluoroalkyl carboxylate (s-11t).

(manufactured by Asahi Glass) 0.14 parts Comparative Examples 1 to 4 In place of Composition B in Example 1, the following compositions were used, and in the same manner as in Example 1, white opaque comparative examples were recorded. I got the material.

, F 1 acrylic resin (MP-4000SO1 Soken Kagaku! 100 parts ethylene-vinyl acetate copolymer resin (Chemipearl V-10
0, manufactured by Mikata Petrochemical Industries, solid content 40%) 1250 parts perfluoroalkyl carboxylate (S-111).

Asahi Glass) 2 parts water
20 parts polyethylene resin (W-1oo, manufactured by Mikata Petrochemical Industries, solid content 40%) 100 parts ionomer resin (
Chemipearl SA-100, Mikata Petrochemical Industry Chi, solid content 35%) 2, 39 perfluoroalkyl carboxylate (S-111, manufactured by Asahi Glass)
0.13 parts H.3 Polystyrene resin (LX303, manufactured by Nippon Zeon, solid content 45%) 100 parts Ionomer resin (Chemipearl SA-tGo, manufactured by Mikata Petrochemical Industries, 1 g A type content 35%) 43 parts Perfluoroalkyl carboxylic acid Salt (S-111.

Asahi Glass) 0.2 parts ■
゛ 4 Polystyrene resin (L-8801, manufactured by Denkasei.

Solid content 48%) 100 parts Styrene-butadiene copolymer resin (L-1838, manufactured by Denkasei, solid content 48%) 5 parts Perfluoroalkyl carboxylate (S-Ot, manufactured by Asahi Glass)
0.16 parts Example 5 and Comparative Example 5 Using the following four types of ink on the recording materials of the above Examples and Comparative Examples, bubbles were generated with a heating resistor, and the pressure was applied to the recording materials. On-demand inkjet recording for ejecting ink was performed using a recording device having two types of inkjet recording. 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.

Sael (composition) C, 1, Acid Yellow 23 2 parts diethylene glycol 15 parts water
85 parts Riku U (composition) C, 1, Acid Red 92 2 parts diethylene glycol 15 parts water
85 parts BiF 9C composition) G, 1. Direct Blue 86 2 parts diethylene glycol 15 parts water
85 parts Elel (composition) C, 1, Direct Black 19 2 parts diethylene glycol 15 parts water
85 parts (1) Ink absorption was measured by leaving the recorded matter at room temperature after inkjet recording, and measuring the time until the ink sufficiently dried and fixed without adhering to the finger even if the recorded area was touched with the finger.

(2) The image optical density (0,0,) is the Macbeth densitometer T
Image observation side A for black ink recording area using R524
and measured from recording surface B.

(3) The dot shape was determined by observing the printed dots with a stereomicroscope from the image observation surface side, and 01 round dots were marked as Δ if the shape was slightly distorted, and × was marked as irregularly shaped dots.

(4) Color sharpness is determined by visually comparing the color sharpness of the inkjet recorded image from the image viewing surface side, and the best one is rated as O and the worst one is graded as x.

Ranking was done as O, o, Δ, and ×.

(5) The coating film strength was evaluated as 0 if powder did not come off when the ink transport layer surface of the recording material was rubbed with a finger, and × if powder did come off.

The above results are shown in Table 1.

(effect) The recording material of the present invention is configured as described above.

Although it is not impossible to observe the recorded image from the side recorded with ink, as with ordinary paper, it is possible to observe the recorded image from the side opposite to the recorded side, that is, from the ink-retaining layer or base material side. It has been observed that it has excellent effects that were not available in the past.

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, by adjusting the proportion of particles and binder used in the ink transport layer that serves as the recording surface, it has an appropriate film strength and contains cracks and communicating pores with an appropriate porosity. The liquid permeability of the ink transport layer is suitably controlled, the ink absorbency and the density of the recorded image are improved, and images with excellent clarity, resolution, color, etc. can be provided.

Furthermore, when a translucent substrate is used as the substrate, in addition to the above-mentioned effects based on the substrate's optical transparency, the recorded image has gloss, water resistance, weather resistance, and abrasion resistance. Granted.

The recording material of the present invention is superior in terms of the optical density of the recorded image and the operability when creating the recorded image, compared to the conventional method of laminating a transparent film on the surface of the recorded image. be.

(Margins below) -na'5 1 = -12 pairs JJL (Recording material) Yu ヱ
] 4±Otsu outer ridge 0.25
0.30 G, 41 0.41 grain j
City city frog L mouth 1Σ 1/3 1/1 t
o/1 30/1 Koji Niyo Ai J←Sex 3
Minutes 1 minute 2 seconds 1 second or less
1.87 1.548 O,80
0,8130,500,42-2-1st history
000 Δcolor-Biao-Rainbow Uniformity
00@0ooo.

1 ru' L-Ki L (Recording material) 1234 Cyl)' = 0.25 0.4
7 0.18 0.77R'-,1!
115 50/1 3/1 20/I
A O,881,28G,97 1
．． 118 O, 800, 51G, 73
0.52 neem”211 Δ××
×mu m standing Δ OX
”L-Once o x o
x Patent applicant Canon Corporation...-) XF! Agent Patent Attorney Notification…Katsu Hiro;Bo 4 Procedures 11
) Masaki (voluntary) 1012, 1986

Claims (11)

[Claims] (1) A recording material having an ink transport layer and an ink retention layer, wherein the ink transport layer is mainly composed of particles that are non-stainable to the recording material and a binder, A recording material characterized in that the weight ratio to the binder is in the range of 1/3 to 30/1, and the porosity of the ink transport layer is in the range of 0.20 to 0.75. (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 recording material according to claim (1), wherein the ink retaining layer is non-porous. (6) The recording material according to claim (1), wherein the ink retaining layer is mainly composed of a water-soluble or hydrophilic polymer. (7) The ink transport layer is light-diffusing, and the ink-retaining layer is more light-transmissive than the ink transport layer.
The recording material described in item 1). (8) The recording material according to claim (1), wherein the ink retaining layer has a stronger ink absorption ability than the ink transport layer. (9) The recording material according to claim (1), wherein the ink transport layer has communication holes. (10) The recording material according to claim (1), wherein the ink transport layer includes cracks. (11) A recording method in which recording is performed using ink on the recording surface of a recording material having an ink transport layer and an ink retention layer, the ink transport layer being non-stainable to the recording material. The ink transport layer is mainly composed of particles and a binder, the weight ratio of the particles to the binder is in the range of 1/3 to 30/1, and the porosity of the ink transport layer is 0.20 to 0.75. A recording method characterized by: