JPS6110483A - Recording material - Google Patents

Abstract

PURPOSE:To record images with excellent ink receptivity, ink color forming property, resolution and water resistance, by producing an ink jet recording material by incorporating a cation-modified polyvinyl alcohol. CONSTITUTION:A coating liquid obtained by dissolving or dispersing a cation- modified polyvinyl alcohol or a mixture thereof with another polymer in an appropriate solvent is applied to a base by a roll coating method or the like, and is dried to provide an ink-receiving layer, thereby obtaining the ink jet recording material. The base may be a transparent or opaque one, e.g., a film, a glass sheet, a paper or a cloth. The cation-modified polyvinyl alcohol is a polyvinyl alcohol having a cationic group such as primary - tertiary amino groups and a quaternary ammonium salt group in a main chain or a side chain thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a recording material suitably used in an inkjet recording method, and in particular a recording material that has excellent ink receptivity and excellent clarity of recorded images. Regarding.

(Prior art) The inkjet recording method uses various ink (recording liquid) ejection methods, such as an electrostatic suction method, a method that applies mechanical vibration or displacement to the recording liquid using a piezoelectric element, and a method that uses a method that applies mechanical vibration or displacement to the recording liquid using a piezoelectric element, and a method that generates foam by heating the recording liquid. In this method, small droplets of ink are generated and made to fly, and some or all of them adhere to a recording material such as paper to perform recording.
It is attracting attention as a recording method that generates little noise and allows for high-speed printing and multicolor printing.

Ink for inkjet recording is mainly composed of water for safety and recording characteristics, and polyhydric alcohols are added to prevent nozzle clogging and improve ejection stability. In many cases.

The recording material used in this inkjet recording method has conventionally been a recording material that is made by providing a porous ink-receiving layer on a base material called ordinary paper or inkjet recording paper. . However, as the performance of inkjet recording apparatuses increases and becomes more widespread, such as faster recording speeds and multicolor recording, more advanced and wide-ranging properties are being required of recording materials. In other words, the recording material for inkjet recording to obtain high-resolution, high-quality recorded images must (1) be able to receive ink as quickly as possible on the recording material, and (2) have overlapping ink dots. (3) Even if the ink that adheres later does not flow into the dot that was previously deposited, and (3) the ink droplet spreads on the recording material and the diameter of the ink dot does not become larger than necessary. , (4) The shape of the ink dot is close to a perfect circle, and its inner radius is smooth. (5) The OD (optical density) of the ink dot is high.

The area around the dot should not be blurred, It is necessary to satisfy basic requirements such as:

Furthermore, in order to obtain high-resolution recorded image quality comparable to color photography using multicolor inkjet recording, in addition to the above-mentioned required performance, (6) the coloring components of the ink must have excellent color development; 7) The ink fixation properties are particularly poor, as the same number of droplets as the number of ink colors may overlap on the same spot, (8) The surface must be glossy, ( 9) High whiteness.

etc. are required in a weighted manner.

In addition, images recorded by the inkjet recording method have traditionally been used exclusively for surface image observation, but as the performance of inkjet recording devices improves and becomes more widespread, images that are recorded using the inkjet recording method have become suitable for purposes other than surface image observation. Recording materials are in demand.

Applications of recording materials other than surface image observation include those used to project recorded images onto a screen etc. using an optical device such as a slide or OHP (overhead projector) and observe those images, and color recording materials. Examples include color separation plates used to create positive plates for printing, and CMF (color mosaic filters) used in color displays such as liquid crystals.

When a recording material is used for surface image observation, mainly the diffused light of the recorded image is observed, whereas for recording materials used in these applications, the main problem is the transmitted light of the recorded image. Become. Therefore, it is required to have excellent light transmittance, especially linear light transmittance, in addition to the above-mentioned performance requirements of the general recording material for inkjet recording.

(The problem that the invention is trying to solve) However,
The reality is that there is still no known recording material that satisfies all of these required performances.

In addition, most conventional recording materials for surface image observation use a method in which a porous ink-receiving layer is provided on the surface, and the recording liquid is received in the porous voids to fix the recording agent. Due to its porous nature, the surface of the recording material lacked gloss. On the other hand, when the surface of the ink-receiving layer is non-porous, non-volatile components such as polyhydric alcohols in the ink remain on the surface of the recording material for a long time after recording, and the drying and fixing time of the ink is long. There are disadvantages in that clothing may get dirty or the recorded image may be damaged if it comes into contact with the recorded image.

An object of the present invention is to provide a recording material for inkjet recording that is particularly excellent in ink receptivity and the clarity of recorded images.

Another object of the present invention is to provide an inkjet recording material having a porous ink-receiving layer on the surface, which can form a recorded image particularly excellent in ink receptivity, ink color development, resolution, and water resistance. The goal is to provide recording materials.

Another object of the present invention is to provide a recording material for full-color inkjet recording that has excellent ink receptivity, sharpness of recorded images, water resistance, and surface gloss.

Still another object of the present invention is to use an optical device such as a slide or an OHP to project a recorded image onto a screen for observation, a color separation plate when creating a positive plate for color printing, or a liquid crystal display. An object of the present invention is to provide a recording material for inkjet recording that can be used for transmitted light observation such as CMF used in color displays.

The above and other objects of the invention are achieved by the following invention.

(Disclosure of the Invention) That is, the present invention provides polyvinyl alcohol (hereinafter referred to as PV
This is a recording material for ink-side recording characterized by containing a cation-modified product of (abbreviated as A).

To explain in detail what has not yet been invented, the recording material of the present invention is mainly characterized in that its recording surface contains a cationically modified product of PVA, and the object of the present invention is mainly achieved thereby. be.

The recording material of the present invention generally consists of a base material as a support and an ink-receiving layer provided on the surface thereof.For example, as a particularly preferred embodiment, (1) both the base material and the ink-receiving layer are transparent. A mode in which the recording material is light-transparent as a whole.

Examples include (2) an aspect in which the surface of the ink-receiving layer is smooth, and (3) an aspect in which the ink-receiving layer is porous.

Further, each ink receiving layer may also function as a support at the same time.

The present invention will be explained in more detail using some preferred embodiments as shown in 1- below as representative examples.The cationic modified product of PVA that mainly characterizes the present invention includes primary to tertiary amine 7 groups and quaternary ammonium bases. This refers to PVA that has a cationic group such as in the main chain or side chain. Generally, PVA is obtained by saponifying polyvinyl acetate using an acid saponification method or an alkali saponification method, but PVA is used in the present invention,
The 11 cationic modified products of PVA that mainly characterize the present invention are vinyloxyethyltrimethylammonium chloride, 2.3
-dimethyl-1-vinylimidazolinium chloride,
Trimethyl-(3-acrylamido-3,3-dimethylpropyl)ammonium chloride, trimethyl-(3
quaternary ammonium salts (or their precursors, such as or o-5m-1p-aminostyrene or their monoargyl or dialkyl derivatives or their Pf
44th class ammonium salt; o-1m-1P-vinylbenzylamine or their monoalkyl or dialkyl derivatives or their quaternary ammonium salts; N-(vinylbenzyl)pyrrolidine, N-(vinylbenzyl)piperidine; N-vinyl Pyrrolidones: α-1β-vinylpyridines or their quaternary ammonium Ij! :α-1
β-piperidine or their quaternary ammonium l
li, 2-. 4-vinylquinoline or their quaternary
Vinyl acetate is copolymerized with vinyl compound monomers that can be easily converted into cationic groups, such as other nitrogen-containing heterocyclic vinyl compounds such as grade ammonium+11, or their nitro derivatives, and the resulting copolymer is quenched by a conventional method. It can be obtained by converting Alternatively, vinyl acetate and a monomer having other reactive groups may be copolymerized, and after saponification, such reactive groups may be used to react with a cationic group-containing compound to cationically modify PVA. good. Furthermore, by utilizing the hydroxyl groups in PVA, PVA can be directly cationized using a compound that simultaneously has a group that can react with the hydroxyl groups and a primary to tertiary amine group or a quaternary ammonium group, such as glycidyltrimethylammonium chloride. may be converted into

The amount of cationic groups present in such a cationically modified PVA is expressed as the median mole fraction of the monomers in the polymer, where the cationic groups account for 0.05 to 1 unit of the total monomers.
The amount ranges from 20 mol%, more preferably from 0.1 to 10 mol%. When the amount of cationic modified groups is less than 0.05 mol%, the inkjet recording physical properties such as water resistance, resolution, and color development of the ink-receiving layer are not sufficiently effective compared to unmodified ones; % or more is not preferable because the adhesive strength of the ink-receiving layer to the base material and the film formability become poor. The degree of saponification of PVA, which is the backbone polymer, should be selected depending on the intended use of the recording material, but generally when it is used as a binder for fillers, etc., which will be described later, added to the ink-receiving layer, the degree of saponification is 85 mol%. When the above-mentioned materials are used as 1=materials for the ink-receiving layer, it is preferable to use about 80 to 93 mol%. The degree of polymerization of the cationically modified PVA is preferably 500 to 5,000, more preferably 800 to 3,000. Furthermore, in any case, materials having different degrees of polymerization and saponification may be mixed and used.

Conventionally, when an ink-receiving layer is formed from a mixture of general PVA and a cationic surfactant or a cationic polymer, the compatibility of both components in the mixture is insufficient, resulting in a decrease in adhesion. and opacity due to lack of compatibility,
Long-term storage often caused deterioration in ink-end recording performance. In contrast, in the present invention,
Since the cationic modified PVA used in the present invention has a cationic group in its molecular chain or side chain, it can be mixed with a cationic surfactant or a cationic polymer to form an ink-receiving layer. In addition, the cationically modified PVA used in the present invention has a cationic group in its molecular chain or side chain, so the crystallization of PVA is controlled, and when used in an ink-receiving layer. This has the effect of improving ink receptivity and maintaining transparency. Furthermore, conventional recording materials such as polyethyleneimine and polyvinylpyridinium halide (
It is known that cationic polymers such as JP-A No. 56-84992) and dimethyl diallylammonium chloride (JP-A No. 59-20696) are incorporated into the recording material to make the dye waterproof. However, when dyes are made water-resistant, they have the disadvantage that their light resistance decreases.

However, unlike conventional cationic polymers, cationically modified PVA does not show any decrease in light resistance even after being made water resistant.

In addition, as the base material used as the support for the ink receiving layer in the present invention, any conventionally known base material such as transparent or opaque can be used, and suitable examples of the transparent base material include, for example, polyester resin. , diacetate resins, triacetate resins, acrylic resins, polycarbonate resins, polyvinyl chloride resins, polyimide resins, films or plates of cellophane, celluloid, and glass plates. Preferred opaque substrates include, for example, general paper, cloth, wood, metal plates, synthetic paper, etc., as well as the transparent substrates listed below that have been treated to make them opaque by known means. .

The recording material of the present invention is formed using the following main materials (1). In a preferred embodiment of (1), both the base material and the ink-receiving layer are translucent, and the recording material This is a mode in which the material as a whole is translucent. This type of recording material has particularly excellent light transmittance, and is mainly used in OHP applications where a recorded image is projected onto a screen or the like using an optical device, and is useful as a recording material for transmitted light observation. be.

Such a translucent recording material has the above-mentioned translucency,
(It can be prepared by forming a translucent ink-receiving layer on a material from a cationically modified PVA alone or a mixture of a cationically modified PVA and another translucent polymer.

The horns for forming such an ink-receiving layer are as follows:
A coating solution is prepared by dissolving or dispersing the cationically modified PVA described in Section 1 or a mixture of this and other polymers in an appropriate solvent, and the coating solution is applied to a side-light roll coating method, a rod bar coating method, etc. It is preferable to coat the transparent base on Murakami by a known method such as a method, a spray coating method, an air knife coating method, etc., and then dry it immediately. Hot melt the mixture! - A method of coating or another method such as forming a single sheet for an ink-receiving layer from the materials described below and then laminating the sheet to the above-mentioned substrate may be used.

Preferred examples of other polymers that can be used in combination with the cationically modified PVA in the above method include:
Albumin, gelatin, casein, starch, cationic starch, gum arabic, natural resins such as alginate sorta, polyamide, polyacrylamide, polyhinylpyrrolidone, quaternized polyhinylpyrrolidone, polyethyleneimine, polyvinylbilicylium halide, Melamine resin, polyurethane, carboxymethyl cellulose, polyvinyl alcohol, polyester.

Polyacrylic acid sorter, SBR latex, NBR latex, polyvinyl formal, polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile,
Synthetic resins such as polyvinyl chloride, polyvinyl acetate, phenol resin, and alkyd resin are mentioned, and one or more of these materials may be used as desired. When such a translucent polymer is used in combination with the cationically modified PVA, the weight ratio of the cationically modified PVA to the other polymer is 20:1 to 1:20, preferably 15:1. l
Use in the range of ~1:10.

In addition, in order to improve the ink receptivity of the ink receptive layer in the method as described in i-1, for example, silica, clay, talc, etc.
Fillers such as diatomaceous, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, synthetic zeolites, alumina, zinc oxide, lithopone, satin white, and the like can also be dispersed in the ink-receiving layer.

The recording material of the embodiment (1) formed as described above is a light-transmitting recording material having sufficient light-transmitting properties.

In the present invention, sufficient light transmittance means that the recording material exhibits a linear light transmittance of at least 2% or more, and preferably a linear light transmittance of 10% or more.

If the linear light transmittance is 2% or more, it is possible to project the recorded image onto a screen and observe it using OHP, for example, and in order to clearly observe the details of the recorded image, it is necessary to It is desirable that the light rate is 10% or more.

The linear transmittance T (%) here refers to the amount of light incident perpendicularly to the sample, transmitted through the sample, and at least 8
The spectral transmittance of the straight light that passes through the light-receiving side slit on the extension of the incident optical path and is received by the detector is measured using, for example, a 323-type self-recording spectrophotometer (manufactured by Hitachi, Ltd.). The Y value of one color is determined from the measured spectral transmittance using the following formula.

T=Y/Y, rate (install an integrating sphere behind the sample to determine the transmittance including diffused light), opacity (
The white and black backings are placed on the back of the sample and the ratio is calculated. ), which evaluates translucency using diffused light.

The problem with devices that use optical technology is the behavior of straight-line light, so when evaluating the light transmittance of the recording material to be used in those devices, it is important to check the straight-line transmittance of the recording material. It is particularly important to seek

For example, when observing a projected image on an OHP, in order to obtain a clear and easy-to-see image with high contrast between recorded and non-recorded areas, the non-recorded areas in the projected image must be bright;
In other words, the linear light transmittance of the non-recording material is required to be at a certain level or higher. In an OHP test chart test, in order to obtain an image suitable for the above purpose, the in-line transmittance of the recording material must be 2% or more, and in order to obtain a clearer image, it is preferably 10%. -L is required. Therefore, a recording material suitable for this purpose must have an in-line transmittance of 2% or more.

The preferred embodiment (2) above is also one of the embodiments (1) above, and is characterized in that the surface of the ink-receiving layer is smooth. This type of recording material has particularly excellent surface gloss, and is particularly suitable for 4F as a recording material for observing surface images in full color and excellent clarity. The recording material in this embodiment may be transparent or opaque, and either the above-mentioned transparent or opaque base materials can be used. Further, the ink receiving layer formed on these base materials may also be transparent or opaque. The materials and methods used to form the ink-receiving layer are the same as those in embodiment (1) above, but the filler, etc., can be used to make the ink-receiving layer opaque as long as the surface of the ink-receiving layer can maintain smoothness. You may use it to the extent that it suits you.

Furthermore, if necessary, in addition to the above-mentioned coating method, a cast coating method or glossing using a gloss roll may be used.

The preferred embodiment (3) above is characterized in that the ink-receiving layer of the recording material of the present invention is a porous ink-receiving layer, and the ink-receiving layer of the recording material has particularly high ink-receptivity. It is also useful for observing surface images with excellent water resistance and full-color clarity.

In addition, as an ink-receiving layer that also has the function of a support, there is a method in which a sizeless paper is impregnated with a cationic modified product of PVA using a size press or the like, or the method described in (1) or (2) above.
In some embodiments, the ink retaining layer is thickened and the base material is peeled off.

The material and method for forming the ink-receiving layer in this embodiment are substantially the same as those in embodiments (1) and (2) above, but in this embodiment, when forming the ink-receiving layer, the ink-receiving layer is It is characterized by the fact that it contains fillers that allow it to quickly accept ink. Preferred examples of such fillers include the above-mentioned (1).
In addition to the fillers mentioned in the embodiment, there are organic filler particles such as polystyrene, polyethylene, urea-formalin resin, polyvinyl chloride, polymethyl methacrylate, etc., and these inserts may be used. The filler that improves ink receptivity is preferably used in the ink-receiving layer in a proportion that accounts for about 10 to 90% of the weight of the ink-receptive layer. The properties of the ink-receiving layer are not significantly improved, and if the amount used is more than that, the physical and mechanical strength of the ink-receiving layer becomes insufficient.

When using relatively large amounts of such fillers, PVA
Since sufficient J& film properties may not be obtained only with the cationically modified product of PVA, it may be desirable to use other polymers as the binding resin in addition to the above-mentioned cationically modified product of PVA. In such cases, PVA
The cationic modified product of is 1 to 90% by weight in the ink-receiving layer,
It is preferably used at a ratio of 2 to 50%.

In the present invention as described above, the thickness of the ink receiving layer formed on the base material is usually about 11-2007i, &f
Preferably, it is about 5 to IQOpm.

The present invention has been described above by exemplifying typical aspects of the recording material of the present invention, but of course the recording material of the present invention is not limited to these aspects. In addition, in any embodiment, the ink receiving layer contains a dispersant, fluorescent dye, p
Various known additives such as H regulators, antifoaming agents, lubricants, preservatives, and surfactants can be included.

Note that the recording material of the present invention does not necessarily have to be colorless, and may be a colored recording material.

Furthermore, as already proposed by the present inventor (Japanese Patent Application No. 59-94)
No. 429, No. 94430, No. 94431), the surface (excluding the aspect (2) above) and/or the back surface of the recording material of the present invention as described in By forming the recording material, it is possible to improve the fixing properties, color development, and stability of the recording liquid of the recording material of the present invention, as well as the prevention of blocking between the recording materials and other properties.

According to the recording material of the present invention containing the cationically modified PVA as described above, even when recording liquids of different colors are repeatedly deposited on the same cylinder within a short period of time, the recording liquid may flow out or seep out. You can obtain high-resolution, clear, water-resistant images with excellent color development. Furthermore, it is possible to provide excellent surface gloss that has not been seen with conventional inkjet recording materials, and it is also possible to provide
For conventional surface image observation, such as those used for observation by projecting the recorded image onto a screen etc. using optical equipment such as, color separation plate when creating a positive plate for color printing, or CMF used for color display such as liquid crystal. It can be applied to other uses.

Hereinafter, the method of the present invention will be explained in more detail according to Examples. Note that parts in the text are based on weight.

Example 1 A polyethylene terephthalate i film (manufactured by Toshi) with a thickness of 100 gm was used as a translucent base material, and a coating liquid having the composition shown in F was applied onto this film so that the film thickness after drying was 15 μm.
Coat using the percoater method so that
It was dried for 0 minutes to obtain a translucent recording material of the present invention.

Coating liquid composition: Cation modified PVA (PVA-C-318AA
(manufactured by Kuraray) 10 parts water
9
0 parts The thus obtained recording material of the present invention was colorless and transparent. For this recording material, the following 4
On-demand inkjet recording head that uses seed ink to eject ink using a piezoelectric vibrator (discharge orifice diameter 60 μm, piezoelectric vibrator drive voltage 70V)
, a frequency of 2 KHz).

Trade ink (composition) C, 1, Direct Yellow 86 2 parts diethylene glycol 20 parts polyethylene glycol #
200 10 parts water
70 parts Red ink (composition) C, 1, Acid Red 35 2 parts diethylene glycol 20 parts polyethylene glycol #
200 10 parts water
70 parts Blue ink (composition) C, 1, Direct Blue 86 2 parts diethylene glycol 20 parts polyethylene glycol #2
00 10 parts water
70 parts black ink (composition) c, r, food black 2 2 parts diethylene glycol 20 parts polyethylene glycol #
200 10 parts water
70 copies The evaluation results of the recording material of this example are shown in Table 1. Each evaluation item in Table 1 was measured according to the following method.

(1) Ink fixation time was measured by leaving the recording material at room temperature after recording and measuring the time taken for the ink to dry and stop adhering to the finger when touching the recorded image with the finger.

(2) Dont concentration is determined using Sakura Microdensidometer PD by applying JISK7505 to printed microdots.
The black dots were measured using M-5 (manufactured by Konishiroku Photo Industry Co., Ltd.).

(3) OHP suitability was measured as a representative example of optical equipment, and the recorded image was projected onto a screen using OHP.
Judgment was made by observing with 11 eyes, the non-recorded area is bright, the OD (optical density) of the recorded image is high,
A projection image that is clear and easy to see with high contrast is obtained. O1 The non-recorded area is slightly dark, the OD of the recorded image is slightly low, and the line with pitch dlo of 5 mm and thickness of 0.25 mm cannot be clearly distinguished. The non-recording area is quite dark,
The OD of the recorded image is quite low, pitch Ill 1 mm
, Those in which the line with a thickness of 0.3 mm could not be clearly distinguished, or in which the non-recorded area and the recorded image could not be distinguished, were marked as x.

(4) Linear light transmittance is measured using a 323-type Hitachi self-recording spectrophotometer (manufactured by Hitachi, Ltd.), keeping the distance from the sample to the light-receiving side at approximately 9c+*, and measuring the spectral transmittance as described above. It was determined using equation (1).

(5) Gloss was measured by measuring the 45° specular gloss of the surface of the recording material based on JIS Z8741.

(6) Water resistance is determined by immersing the recording material in running water for 1 hour and measuring the optical density (OD) using a Macbeth degree meter after immersion.
was evaluated by comparing it with the OD value before immersion.

(7) Light resistance is xenon fade meter FAL-2
The sample was irradiated for 100 hours using Model 5AX-HC (manufactured by Suga Test Instruments), and the color difference (Lab) from the unirradiated sample was measured using NP-10010P (+'i Hondenshoku).

Example 2 The polyester film used in Example 1 was used as a translucent base material, and this film-L was coated with the following composition.
The liquid was coated by a percoater method so that the thickness of the ink-receiving layer after drying was 20 μm, and was dried by heat treatment at 60° C. for 20 minutes to obtain a translucent recording material of the present invention.

Coating liquid composition: Cation modified PVA (PVA-C-418A, manufactured by Kuraray) 10 parts water
90 parts The thus obtained recording material of the present invention was colorless and transparent.

Inkjet recording similar to that in Example 1 was also performed on this recording material, and the recording characteristics were evaluated in the same manner as in Example 1. The results are also shown in Table 1.

Example 3 Using quality paper as a base material, a coating liquid having the following composition dispersed with a sand mill was applied onto the quality paper using a percoater method so that the thickness of the ink-receiving layer after drying was approximately 20 pm. The opaque recording material of the present invention was obtained by drying by heat treatment at 120° C. for 10 minutes.

Coating liquid composition: Cation modified PVA (PVA C-118AA manufactured by Kuraray) 3 parts fine powder silica (
Thyroid 620 (manufactured by Fuji Davison) 12 parts water

85 parts The thus obtained recording material of the present invention was white and opaque. Inkjet recording similar to that in Example 1 was performed on this recording material, and the recording characteristics were evaluated in the same manner as in Example 1.

The results are shown in Table 1.

Example 4 A recording material of the present invention was obtained in the same manner as in Example 2, except that art paper was used as the substrate. The obtained recording material was white and opaque. Inkjet recording similar to that in Example 1 was performed on this recording material, and the recording characteristics were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 5 Multilayer inkjet paper (IJ paper, manufactured by Mitsubishi Paper Industries)
cation-modified PVA (PVA C-118AA
(manufactured by Kuraray) at a ratio of 0.5 g/m' to obtain the recording material of the present invention. Table 1 shows the evaluation results of the recording characteristics of this recording material in the same manner as in Example 1.

Comparative Example 1 Inkjet recording was carried out in the same manner as in Example 1, using only the polyester film used in Example 1 as a recording material. Table 1 also shows the results of evaluating the recording characteristics of this recording material in the same manner as in Example 1.

Comparative Example 2 A recording material was obtained in the same manner as in Example 3, except that polyvinyl alcohol PVA-117 was used instead of the cationically modified PVA. The obtained recording material was white and opaque. Example 1 for this recording material
Inkjet recording was carried out in the same manner as in Example 1, and the recording characteristics were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 3 Inkjet recording was carried out in the same manner as in Example 1, using the art paper used in Example 1 as it was as a recording material. Table 1 shows the results of evaluating the recording characteristics of this recording material in the same manner.

Comparative Example 4 A recording material was obtained in the same manner as in Example 3, except that the following composition was used as the coating composition.

Polyvinyl alcohol (PVA-117,') manufactured by Iy) 3
Part polyethyleneimine (P-1000, Nippon Shokubai Chemical System) 0.1 part Fine powder silica (Syroid 620 manufactured by Fuji Devin) 12 parts Wood

85 copies of this recording material was subjected to inkjet recording in the same manner as in Example 1, and the recording characteristics were evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 5 A recording material was obtained in the same manner as in Example 5, except that the cation-modified PVA was not impregnated. Inkjet recording was performed on this recording material in the same manner as in Example 1, and the recording characteristics thereof were evaluated in the same manner as in Example 1. The results are shown in Table 1.

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% 5%-Taiichiichiichikiichiichiseiichi (Y) -137% -
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-98% (BK) -
se% -92% resistance--uniformity (Y) AE=0.5% 0.7% 0.9%
0.6% 0.4% (M) 3.5%
3.8% 5.8% 3.4% 3.0% (
C) 1.8% 1.5% 3.7%
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101% 2% ((1:) -2
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-15% 10% 80%
18% chu-resistance (-m-resistance)

Claims (1)

[Claims] A recording material for inkjet recording characterized by containing a cationically modified polyvinyl alcohol.