JPS61188181A - Recording material - Google Patents

Abstract

PURPOSE:To obtain an ink jet recording material having excellent ink receptivity, water resistance and clearness of recorded images, by forming an ink- receiving layer of a polymer complex of a basic polymer and an acidic polymer. CONSTITUTION:A basic polymer and an acidic polymer having molecular weights of not less than 500 are used for forming an ink-receiving layer having excellent ink receptivity, water resistance and clearness of images. The basic polymer is a homopolymer or copolymer of N-vinylpyrrolidone, N- vinylpiperidone, N-vinyl-5-methyl-2-oxazolidone or the like, and the acidic polymer is a copolymer of an alkyl vinyl ether and maleic anhydride or the like. The polymers are used in a weight ratio of basic polymer to acidic polymer of 20/1-1/10. If the amount of the basic polymer is too large, water resistance is low, whereas if the amount of the acidic polymer is too large, ink receptivity is low.

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 has excellent ink receptivity, sharpness of recorded images, and water resistance. Regarding recorded recording materials.

(Prior Art) The 4-jet recording method uses various ink (recording liquid) discharge methods, such as an electrostatic suction method, and a piezoelectric element to apply mechanical vibration or displacement to the ink. A method in which ink is heated and foamed, and the resulting pressure is used to generate and break small droplets of ink and oxide, and a portion of them or 1. I use liquid fertilizer such as paper for everything.

It is used to record by attaching it to the recording material, but 1. It is noisy! .

It is possible to perform high-speed printing and multi-color printing with less occurrence of blemishes.

It is attracting attention as a recording method.

Ink and jet recording ink are mainly water-based in terms of safety and recording properties.
Polyhydric alcohols are often added to prevent nozzle clogging and improve discharge stability.
.

The recording material used in this inkjet recording method has conventionally been liquid fertilizer 4, which is made by providing a porous ink-receiving layer on a base material called regular paper or inkjet recording paper.
# has been used.

However, ink such as faster recording or multi-colored ink is needed.

■ With the improvement and spread of 1-jet recording equipment.

Recording materials are increasingly being required to have more sophisticated and wide-ranging properties.

In other words, the recording material for inkjet recording in order to obtain high-resolution, high-quality recorded images must: (1) be able to absorb ink into the recording material as quickly as possible; (3) Even in the case of overlap, the ink droplets deposited later do not flow into the dots deposited earlier; (3) the ink droplets do not spread on the recording material and the diameter of the ink dots does not become larger than necessary; 4) The shape of the ink dot should be close to a perfect circle, and the circumference should be smooth.

(5) The OD (optical density) of the ink dots is high.

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

Furthermore, in order to obtain a high-resolution recorded image quality comparable to that of a color photograph using a multicolor inkjet recording method, in addition to the above-mentioned required performance.

(6) The coloring components of the ink should have excellent coloring properties.

(7) The ink fixation properties are particularly excellent since the same number of droplets as the number of ink colors may adhere to the same spot, (8) The surface must be glossy, (9) White A high level of performance, etc., is required with emphasis on performance.

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 has improved and become more widespread, recorded images have become suitable for purposes other than surface uniformity observation. There is a growing demand for materials.

Applications of the recording material other than surface image observation include those used to project the recorded R image 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, the diffused light of the recorded image is mainly observed, whereas for recording materials used in these applications, the problem is mainly the transmitted light of the recorded image. Therefore, it has excellent translucency, especially for the vehicle ahead in a straight line.
This requirement is added to the performance requirements of the recording material for general inkjet recording described above.

(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, many conventional recording materials for surface image observation have a porous ink-receiving layer on one surface, and the ink is received in the porous voids to fix the recording material. The surface of the recording material was not glossy due to the nature of the recording material.

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. However, if they come into contact with the recorded image, they stain clothing or damage the recorded image.

In addition, in the case of recording materials that use water-soluble polymers to form the ink-receiving layer in order to improve affinity with ink and ink receptivity, the surface of this ink-receiving layer becomes sticky under high humidity conditions. Therefore, when it is installed in a printer, it adheres to the printer's feed roller, etc., making it impossible to convey the recording material, and also causing blocking of the recording materials when stacked.

Therefore, an object of the present invention is to provide a recording material for inkjet recording that is particularly excellent in ink receptivity, water resistance, and clarity of recorded images6. Excellent performance, sharpness of recorded images, and surface gloss.
An object of the present invention is to provide a recording material for full-color inkjet recording that does not cause stickiness or blocking on one surface even under high humidity and temperature conditions.

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 for 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 an inkjet recording material comprising an ink-receiving layer provided on a base material, wherein the ink-receiving layer is made of a polymer complex of a basic polymer and an acidic polymer. This is an inkjet recording material.

To explain the present invention in detail, 1. The recording material of the present invention is characterized in that its ink-receiving layer is composed of a polymer complex of a basic polymer and an acidic polymer. It is something that

The recording material of the present invention generally comprises a base material as a support and a recording surface provided on the surface thereof, that is, an ink receiving layer, and is, for example, a particularly preferred embodiment.

Examples include (1) an embodiment in which both the base material and the ink-receiving layer are translucent and the recording material as a whole is translucent; and (2) an embodiment in which the surface of the ink-receiving layer is smooth and glossy.

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 the above preferred embodiments as representative examples.

The polymer complex that mainly characterizes the present invention is composed of a basic polymer and an acidic polymer, and is already known per se, for example, in Japanese Patent Publication No. 51-37017 and Japanese Patent Publication No. 55-42744.

In the present invention, preferred basic polymers include, for example, the following.

N-vinylpyrrolidone, N-vinyl-3-methylpyrrolidone, N-vinyl-5-methylpyrrolidone, N-vinyl-3,3,5-)limethylpyrrolidone, N-vinyl-3
-Benzylpyrrolidone, N-vinylpiperidone, N-vinyl-4-methino, reviberidone, N-vinyl-caprolactam, N-vinylcapryllactam, N-vinyl-
Homopolymers of 3-morpholine, N-vinylthiopyrrolidone, N-vinyl-2-pyridone, etc., or random copolymers, block copolymers, graft copolymers, etc. with other common heptamers: N -vinyl-2-oxazolidone, N-vinyl-5-methyl-2-oxazolidone, N-vinyl-5-ethyl-
2-oxazolidone, N-vinyl-4-methyl-2-oxazolidone, N-vinyl-2-thioxazolidone,
Homopolymers such as N-vinyl-2-mercaptobenzothiazole or random copolymers, block copolymers, graft copolymers, etc. with other nine common monomers; N-vinylimidazole, N-vinyl-2- Homopolymers of methylimidazole, N-vinyl-4-methylimidazole, etc., or random copolymers and block copolymers with other common heptamers.

Graft copolymers, etc.: Examples include homopolymers such as 2- or 4-vinylpyridine, random copolymers with other common monomers, block copolymers, graft copolymers, etc. Other copolymerizable monomers that may be used include methacrylate, acrylate, acrylamide, acrylonitrile, vinyl ether, vinyl acetate, vinylimidazole,
Ethylene, styrene and other common heptamers are particularly useful in the present invention, such as N-vinylpyrrolidone, N-vinylpiperidone, N-vinylcaprolactam, N-vinylmorpholine, N-vinyl-2-
Oxazolidone, a homopolymer of N-vinyl-5-methyl-2-oxacylidone.

Copolymers, etc. In the case of a copolymer, it is preferable that the above-mentioned nitrogen-containing polymer is included in an amount of 50 mol % or more.

In addition, an axial polymer that can form a polymer complex with the above basic polymer (in the present invention, "acidic polymer, -" means a sulfonic acid group, a carboxylic acid group, a sulfuric acid ester group, a phosphoric acid ester group, etc. in the molecule) Examples of the group (which includes not only those having a phenolic hydroxyl group but also those having an alcoholic hydroxyl group) include the following.

1. Polymer having a carboxylic acid group Polyhydric carboxylic acid such as citric acid, tartaric acid, phthalic acid,
Polyesters with terminal carboxyl groups obtained by reacting polyhydric alcohols such as ethylene glycol, 1,4-butanediol, and diethylene glyconyl with excess acid; Acidic cellulose derivatives modified with each i polyhydric carboxylic acid (
(Refer to Japanese Patent Publication No. 3'5-5093); homopolymers such as vinyl ether ester monomers of polyhydric carboxylic acids, random isomolymers with other common monomers, block copolymers, graft copolymers, etc. Tokuko Sho 35-849
(Refer to Publication No. 5); A heptamer homopolymer such as acrylic acid or methacrylic acid or a random copolymer with other common monomers,
Block copolymers, graft copolymers, etc.: Homopolymers of α, β-unsaturated vinyl monomers such as maleic anhydride and itaconic acid, or random copolymers and block copolymers with other common monomers. , graft copolymers, etc. (Citrus, Bengami, Tani eds., Synthetic polymers (m) P, 25
0-257 JC BiP, 374-380, Breakfast Bookstore (1
971); 2. Polymers with sulfonic acid groups 0-ethylcellulose hydrogen acetate hydrogen sulfate phthalate, cellulose hydrogen acetate hydrogen sulfate phthalate, ethylcellulose hydrogen-〇-sulfobenzoate ester, 0-P-sulfonebenzylcellulose acetic acid ester, 0-ethyl-
〇-P-Sulfoethyl cellulose Cellulose derivatives such as nistyl acetate (see Japanese Patent Publication No. 35-5093)
: Sulfonic acid compound of polyvinyl alcohol or vinyl alcohol copolymer (e.g. O-sulfobenzoic acid,
3. Polymers with hydroxyl groups Ethylcellulose, benzylcellulose, hydroxyethylcellulose, hydroxyethyl/benzylcellulose, hydroxyethyl/benzyl Cellulose, etc.; Homopolymers of monomers containing other sulfonic acid or phenol groups, or random copolymers, block copolymers, graft copolymers, etc. with other common monomers;
'Other carboxyl groups are acidic modified products of various polymers with sulfonic acid groups or phenol group-containing compounds; Although any of the above acidic polymers can be used, □One particularly preferred in the present invention is: α, β−
The unsaturated acids are also homopolymers, random copolymers, block copolymers, and graft copolymers, and particularly preferred are copolymers of alkyl vinyl ether and maleic anhydride.

The present inventor has been conducting various research on mixtures of basic polymers and acidic polymers as described above, and found that
``By mixing these polymers in solution,
Both polymers interact in some way to form a polymer complex that is different from either polymer, and if both polymers are mixed in a relatively good solvent, the polymer complex will precipitate; It has been found that this results in a significant increase in viscosity, etc., resulting in properties different from those of a mere mixture of the two polymers used.

Therefore, the polymer complex used in the present invention means a polymer complex made of the above-mentioned polymers (details of the basic polymer □, the acidic polymer, and the polymer complex made of these polymers are given in Japanese Patent Publication No. 1973). Please refer to Publication No. 3'7017 and Japanese Patent Publication No. 55-42744.)
.

The present inventors have further researched seven different uses of the polymer complexes of Hire et al., and have found that these polymer complexes are extremely water resistant and moisture resistant, despite being extremely hydrophilic. The wood used to form the ink-receiving layer of the jet recording material exhibits ink receptivity equivalent to that of conventional water-soluble polymers and provides clear images.
It was discovered that the surface did not become sticky even under high humidity conditions.

As mentioned above, polymer complexes generally contain water,
Since it does not dissolve in relatively poor solvents such as alcohols, esters, hydrocarbons, etc., the polymer complex used in the present invention can be prepared by dissolving both polymers in these poor solvents and mixing the re-solutions. Can be isolated. Alternatively, a solution of the polymer complex can be obtained by mixing in a relatively good solvent such as dimethylformamide, dimethylacetamide, dimethylsulfoxide, or the like.

Preferred basic polymers and acidic polymers for forming the above polymer complexes each have a molecular weight of 500 or more, preferably t,ooo or more, and by using both polymers with these molecular weights, It is possible to form an ink-receiving layer that has high strength and excellent ink-receptivity, image clarity, and water resistance.

The ratio of both polymers used is within a range of 20/1 to 1/10 (basic polymer/acidic polymer) in terms of weight ratio, preferably a ratio where the basicity and acidity of each polymer are approximately equal. It is. If the weight ratio deviates from the above range, the bonding between both polymers will be insufficient, making it impossible to fully achieve the objects and objectives of the present invention. That is, if the basic polymer is too large, the water resistance will be reduced, and if the acidic polymer is too large, the ink receptivity will be reduced.

The ink-receiving layer of the recording material of the present invention is formed using the above-mentioned polymer complex, but in the present invention, in addition to the above-mentioned polymer complex, other light-transmitting polymers, such as It may also be used in combination with polymer complexes.

Preferred examples of such other polymers include albumin, gelatin, casein, starch, cationic starch, arabicum, natural resins such as sodium alginate, polyvinyl alcohol, polyamide, polyacrylamide, quaternized polyvinylpyrrolidone, polyethyleneimine,
Synthetic resins such as polyvinylpyricillium halide, melamine resin, polyurethane, polyester, and sodium polyacrylate can be mentioned, and one or more of these materials can be used in combination if desired.

Furthermore, in order to reinforce the strength of the ink-receiving layer and/or improve the adhesion with the base material, SBR latex, NBR latex, polyvinyl formal, polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile, polyvinyl chloride may be added as necessary. , polyvinyl acetate, phenol resin, al-q-7d resin, etc. may be used in combination.

In addition, in order to improve the ink absorbency of the ink receiving layer, various fillers such as silica, clay, etc. are added to the ink receiving layer.
Talc, diatomaceous earth, calcium carbonate, calcium sulfate 1. Fillers such as barium sulfate, heptaluminium silicate, synthetic zeolite, aluminium, mina, zinc oxide, lithopone, satin white, and the like can also be dispersed in the ink-receiving layer.

Furthermore, 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.
For example, films or plates of polyester resin, diacetate resin, triacetate resin, acrylic resin, polycarpo, nate resin, polyvinyl chloride resin, polyimide resin, cellophane, celluloid, etc., and glass plates. etc. are listed. In addition, examples of preferred materials for the opacity base material include general paper, cloth, wood, metal plates, synthetic paper, etc. Examples include those obtained by processing a highly transparent base material to make it opaque by known means.

Although the recording material of the present invention is formed using the above-mentioned main materials, the preferred embodiment of the above (1) includes the base material, the ink receiver, and! Both layers are translucent and have a linear transmittance of 1.
0% or more, and the recording material as a whole is translucent.

The recording material of this embodiment is particularly excellent in translucency, and is used in OHP applications in which recorded images are projected onto a screen or the like using an optical device.
It is mainly used in cases such as the following, and is useful as a recording material for transmitted light observation.

Such a translucent recording material can be formed by forming a translucent ink-receiving layer on the translucent base material using the above-mentioned polymer complex alone or a mixture with other translucent polymers. It can be prepared by

As a method for forming such an ink-receiving layer, a coating solution is prepared by dissolving or dispersing the above-mentioned polymer complex alone or a mixture with other suitable polymers in a suitable solvent, and the coating solution is prepared by: For example, coating on a transparent substrate by a known method such as roll coating method, rod bar coating method, spray coating method, air knife coating method, etc. and then drying immediately, or using a solution of basic polymer or acidic polymer. A preferred method is to apply one of the solutions and then apply the other solution to form a polymer complex on the substrate.
Alternatively, a method of hot-melt coating the above-mentioned polymer complex alone or a mixture with other polymers, or a method of forming a single film for an ink-receiving layer from the above-mentioned materials and then laminating the film on the above-mentioned substrate. Other methods may also be used.

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 preferably exhibits a linear transmittance of at least 2%, preferably 10% or more.

If the in-line transmittance is 2% or more, it is possible to project the recorded image onto a screen and observe it using an OHP, and furthermore, in order to clearly observe the details of the recorded image,
It is desirable that the in-line transmittance is 10% or more.

The linear transmittance T (%) here refers to the incident perpendicular 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 line of the incident optical path separated by more than cm and is received by the detector is measured using, for example, the 323-type Hitachi self-recording spectrophotometer (manufactured by Hitachi, Ltd.). The Y value of the tristimulus value of the color is determined from the measured spectral transmittance, and the value is determined from the following formula. - T=Y/Y, (An integrating sphere is placed 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.

Since linear behavior is a problem with devices that use optical technology, it is important to evaluate the linear transmittance of the recording material when evaluating the translucency of the recording material to be used in these devices. 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;
That is, the in-line transmittance of the 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 linear transmittance of the recording material should be 2% or more, and in order to obtain a clearer image, preferably 10% or more. something is required. Therefore, a recording material suitable for this purpose must have an in-line transmittance of 2% or more.

The preferred embodiment of (2) above is also one of the embodiments of (1) above, in which the surface of the ink receiving layer is smooth and JISZ
It is characterized by a 45 degree specular gloss based on 8741 of 30% or more.

This type of recording material has particularly excellent surface gloss, and is particularly useful 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. 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 form an opaque ink-receiving layer as long as the surface of the ink-receiving layer can maintain smoothness. It may be used to the extent that

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

In the present invention as described above, the thickness of the ink receiving layer formed on the substrate is usually about 1 to 200 ILm, preferably about 3 to 1100 ILm, and more preferably about 5 to 30 ILm.

Furthermore, in the present invention, fine organic or inorganic powder is applied to the recording surface of the recording materials of various embodiments as described above at a rate of about 0.01 to about 1.0 g/ln. By doing so, it is possible to further improve the transportability in the printer, the blocking resistance during stacking, the fingerprint resistance, etc. of the obtained liquid fertilizer electrical material.

The present invention has been explained above by illustrating 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. Also, 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.

The recording material of the present invention as described above exhibits excellent ink receptivity similar to those in which the ink receptive layer is formed from a conventional water-soluble polymer, provides recorded images with excellent clarity, and furthermore, under high humidity conditions. However, the surface does not become sticky or sticky.

Therefore, when recording monochrome as well as full-color images, even if ink of different colors adheres to the same spot repeatedly within a short period of time, there is no ink flow or seepage phenomenon, and high-resolution, clear recording is possible. An image is obtained.

Moreover, unlike conventional recording materials using water-soluble polymers, the recording material of the present invention does not cause the surface of the ink-receiving layer to become sticky or sticky even when the above-mentioned recording is performed under extremely high humidity conditions. Since this does not occur at all, there is no problem in the printer, and even when stacked, there is no blocking or color transfer.

The excellent effect under such high humidity conditions is due to the fact that the two types of polymers used to form the ink-receiving layer have strong bonds between their molecules, such as interionic electrostatic force, hydrogen bonding, van der's bond, etc.
It is thought that some kind of weak bond occurs due to Waalska, partial movement of electric charges, etc., forming a polymer complex, which shows excellent water resistance even under high humidity conditions while maintaining high ink receptivity.

It was completely unexpected that such excellent effects as described above could be achieved by a water-insoluble polymer complex.
This is because the ink is a mixture of water and polyhydric alcohol, so the applied ink temporarily dissolves or swells the ink-receiving layer of the recording material to promote ink reception, and after receiving the ink, the water evaporates. This is believed to be because the ink-receiving layer returns to its original water-insoluble polymer complex through absorption and evaporation. It should be noted that such a theory is just imagination and does not limit the present invention in any way.

With the present invention, it is possible to provide an excellent surface gloss that has not been seen with conventional inkjet recording materials, and it is also possible to provide recorded images by projecting them onto a screen or the like using an optical device such as a slide or OHP. It can be applied to applications other than conventional surface image observation, such as those used for observation, color separation plates when creating a positive plate for color printing, or CMF used for color displays such as liquid crystals.

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

Example 1 10% aqueous solution of polyvinylpyrrolidone (PVPK-90,
GAF) and 66 parts of methyl vinyl ether/maleic anhydride copolymer (GANTREZ AN-189, GAF
34 parts of a 10% aqueous solution (manufactured by Manufacturer Co., Ltd.) were mixed therein. The mixed solution gels to form a polymer complex, but 100 parts of N,N-dimethylformamide is added to this mixed solution, and 90 parts of N,N-dimethylformamide is added.
When heated to ℃, it becomes a solution, which is used as a coating liquid.

A polyethylene terephthalate film (manufactured by Toshi) with a thickness of 100 ILs was used as a translucent base material, and a coating solution with the above composition was applied onto this film with a bar so that the film thickness after drying was 81 parts. It was coated by a coater method and dried at 80° C. for 10 minutes to obtain a translucent recording material of the present invention.

The thus obtained recording material of the present invention was colorless and transparent.

Examples 2 to 5 and Comparative Examples 1 to 3 A coating solution was prepared in the same manner as in Example 1 using the following composition, and applied to the same polyethylene terephthalate film as used in Example 1. An ink-receiving layer was provided in the same manner as above to obtain four types of translucent recording materials of the present invention and three types of recording materials for comparison.

1 1” Polyvinylpyrrolidone (manufactured by PVPK-90GAF) <i
o% aqueous solution> 66 parts methyl vinyl ether/maleic anhydride monoethyl ester copolymer (GANTREZ E S 425, manufactured by GAF) <1
Diluted in 0% ethanol solution> 34 parts crushed Polyvinylpyrrolidone (manufactured by PVPK-90GAF) (i
o% aqueous solution) 75 parts Isobutylene/maleic anhydride copolymer (isopan 1O, manufactured by Clarei Soprene) (10% DMF solution) 25 parts Branch 1
” Polyvinylpyrrolidone (manufactured by PVPK-90GAF) <1
0% aqueous solution) 66 parts Tannin ugliness <10% aqueous solution) 34 parts Length J 1j Polyvinylpyrrolidone/vinyl acetate copolymer (Ruviskol 73E, manufactured by Yuka Badish)゛<5%
50 parts Hydroxyethylcellulose (HECAG-15, manufactured by Fuji Chemical) (5% ethanol solution) 50 parts Poly-N-vinylimidazole (1.0% ethanol solution) 66 parts Methyl vinyl ether/ Maleic acid monoethyl ester (10% ethanol solution) 34 parts 1 Poly-N-vinyl-5-methyl-2-oxazolidone (5% ethanol solution) 50 parts Hydroxyethylcellulose (5% aqueous solution) 50 parts ” Polyvinylpyrrolidone <10% aqueous solution> 56 parts Methyl vinyl ether/maleic acid monoethyl ester (10% ethanol solution> 19 parts D-sorbitol/benzaldehyde condensate <Gelol D, manufactured by Shin Nippon Rika, 10% DMF solution> 25 parts ``Kaihuang'' Polyvinyl alcohol (PVA-217, manufactured by Kuraray) 10 parts water

90 parts ratio: Polyvinylpyrrolidone (PVPK-90, manufactured by GAF) 10 parts water

90 parts ratio' Komaro 1dan polyvinylpyrrolidone (manufactured by PVPK-90GAF) <1
0% aqueous solution) 50 parts Polyvinyl alcohol (PVA-220, manufactured by Kuraray) 50 parts The following four types of ink were used to eject ink using a piezo vibrator onto the recording materials of the above examples and comparative examples. On-demand inkjet recording head (discharge orifice diameter 60IL, piezo vibrator drive voltage 70V,
Inkjet recording was performed using a recording device having a frequency of 2 KHz).

Good work! (Composition) c, r, Direct Yellow 86 2 parts diethylene glycol 20 parts polyethylene glycol #
200 10 parts water
70 parts (composition) C, 1, Acid Red 35 2 parts diethylene glycol 20 parts polyethylene glycol #
200 10 parts water
70 parts 1 Eeno (composition) C, 1, Direct Blue 86 2 parts diethylene glycol 20 parts polyethylene glycol #2
00 10 parts water
70 parts Ri 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 materials of the Examples and Comparative Examples are shown in Table 1.

Each evaluation item in Table 1 was measured according to the following method.

(1) The ink fixation time is the time when the ink dries and sticks to the finger when the recording material after recording is left at room temperature (20°C, 65% RH) and the recorded image is touched with the finger. The time it took to disappear was measured.

(2) The dot density was calculated using Sakura Microdensidometer PD by applying JISK7505 to the 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.
Judging by visual observation, 0 indicates that the non-recorded area is bright, the OD (optical density) of the recorded image is high, and a clear and easy-to-see projected image with high contrast is obtained, while the non-recorded area is slightly dark and recorded. If the OD of the image is rather low and the line with a pitch width of 0.5 mm and a thickness of 0.25 mm cannot be clearly distinguished, Δ is used. Sa0-3
A sample in which the mm line could not be clearly distinguished or a non-recorded area and a recorded image could not be distinguished was rated as "×".

(4) Linear transmittance was measured using a 3-part 3-type Hitachi self-recording spectrophotometer (manufactured by Hitachi, Ltd.), keeping the distance from the sample to the light-receiving side approximately 9 cm, and measuring the 1-minute transmittance. It was determined using equation (1).

(5) Transportability: When the recording material is installed in the printer under the conditions of 35°C and 85% RH, the ink receiving layer surface is sticky, so it cannot be transported by the printer's feed roller and recording cannot be performed. Those that are are marked as X, and those that are not are marked as O.

(6) For blocking, after 12 hours of printing, high-quality paper was brought into close contact with the printed surface and stored for 12 hours. After storage, the case where no adhesion occurred between the recording material and the high-quality paper was rated 0, and the case where no adhesion occurred was rated x.

(7) Regarding the formation of a polymer complex, when the basic polymer and acidic polymer solutions were mixed, those in which there was a rapid increase in viscosity or gel formation were designated as O, and those in which no gel was formed were designated as X.

(Left below) 2. L≦L” Knee Example - 1. Overflowing 45 Dan.
to minute 5 minutes 3 minutes lO minute 3 minutes 5 minutes 5 minutes 2 minutes hill 2 j JIJ
1.1 1.1 1.1 1.2 1.0 1.1
1.0 1.10HP OOOOOOOOOO '-74%73%78%78%74%78%78%78
%L New Upper No. 00000000 ffl:”;”' OOOOOOOOOO -Comparison example- 4y illusion 3 minutes 5 minutes 1 minute-L-axis JLJ 1.1 1.1 1-11-
"Shi-1 ××× Patent Applicant Canon Co., Ltd. Agent Patent Attorney Yoshi 1) Katsuhiro Shi2゛Benipaku1.
G'x-

Claims (1)

[Claims] An inkjet recording material comprising an ink-receiving layer provided on a base material, wherein the ink-receiving layer is made of a polymer complex of a basic polymer and an acidic polymer.