JPS62160273A - Material to be recorder - Google Patents

Abstract

PURPOSE:To provide a material to be recorded for full-color ink jet recording excellent in ink receptivity, imparting a recording image excellent in sharpness and surface glass and generating no surface stickiness or blocking even under a high humidity condition, by containing a polymer complex consisting of a basic polymer and a ketone resin in an ink receiving layer. CONSTITUTION:As one component forming a polymer complex containing a basic polymer, a ketone resin is selected to obtain an ink receiving layer wherein the film of an ink receiving part is strong even at an area where ink dots are concentrated and no blocking or color transfer is generated even when films are stacked within a short time after printing. As the pref. basic polymer, there are a homopolymer and a copolymer of N-vinyl pyrrolidone, N-vinyl piperidone, N-vinyl caprolactam, N-vinyl morpholine, N-vinyl-2-oxazolidone and N-vinyl-5-methyl-2-oxazolidone.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording material suitably used in an inkjet recording method, particularly in terms of ink receptivity, clarity of recorded images, water resistance, blocking resistance, etc. Regarding excellent recording materials.

(Prior Art) Inkjet recording methods include various ink (recording liquid) ejection methods, such as an electrostatic suction method, a method that applies mechanical vibration or displacement to the ink using a piezoelectric element, and a method that heats the ink to foam it. This method utilizes the pressure to generate and fly ink droplets, and some or all of them adhere to a recording material such as paper to perform recording, but it generates little noise and It is attracting attention as a recording method that allows 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 consisting of a base material called ordinary paper or inkjet recording paper on which a porous ink receiving layer is provided.

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) Ink droplets do not spread on the recording material and the diameter of the ink dot does not become larger than necessary, ( 4) Satisfies basic requirements such as the shape of the ink dot being close to a perfect circle and its circumference being smooth; (5) the 00 (optical density) of the ink dot being high and the periphery of the dot not being blurred; There is a need.

Furthermore, in order to obtain high-resolution recorded image quality comparable to color photography using a multicolor inkjet recording method, 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 excellent, as the same number of droplets as the number of ink colors may adhere to the same spot, (8) The surface must be glossy, (9) Whiteness A high level of performance, etc., is required.

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, recording materials suitable for purposes other than surface image observation have become available. is becoming required.

Applications of recording materials other than surface image observation include those used to project recorded images onto a screen etc. using optical equipment such as slides and OHP (overhead projectors) for observation, and color printing. Examples include color separation plates used to create positive plates, 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. 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, many conventional recording materials for surface image observation use a method in which a porous ink-receiving layer is provided on the 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. 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.

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 g quality of recorded images.

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, and surface gloss, and does not cause surface stickiness, blocking, etc. even under high humidity conditions. It is in.

Another object of the present invention is to use an optical device such as a slide or 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 color separation plate for liquid crystal display. C used for display
An object of the present invention is to provide a recording material for inkjet recording that can be used for observation of transmitted light such as MF.

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

(Disclosure of the Invention) That is, the present invention provides an inkjet recording material in which an ink-receiving layer is provided on a base material, wherein the ink-receiving layer contains a polymer complex of a basic polymer and a ketone resin. This is an inkjet recording material.

To explain the present invention in detail, the recording material of the present invention is mainly characterized in that its ink-receiving layer is composed of a polymer complex of a basic polymer and a ketone resin, and the object of the present invention is mainly achieved thereby. It is something that will be done.

The recording material of the present invention generally consists of a base material as a support and a recording surface provided on the surface of the base material, that is, an ink receiving layer. For example, as a particularly preferred embodiment, (1) the base material and the ink receiving layer. Examples include (2) an embodiment in which all of the recording materials 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 primarily characterizes the present invention is composed of a basic polymer and a ketone resin.

Traditionally, polymer complexes containing basic polymers are
For example, Japanese Patent Publication No. 51-37017 and Japanese Patent Publication No. 51-37017
It is publicly known in Japanese Patent No. 5-42744.

The present inventor has discovered that the above polymer complex is soluble in good solvents such as dimethylformamide and dimethyl sulfoxide, is useful for forming an ink receiving layer of recording materials, and has various properties such as ink fixability and water resistance. It was discovered that an excellent recording material could be obtained (Patent Application No. 60-2633)
(See specification No. 3).

However, the ink-receiving layer obtained in this way has low durability against the polyhydric alcohol contained in the ink, and the surface of the ink-receiving area that has received high-density ink dots becomes sticky under hot and humid conditions. Phenomena such as stickiness and stickiness appeared, and a new problem arose in that blocking and color transfer occurred when the films were stacked unless they were dried for a considerable period of time after printing.

As a result of further research to solve the above-mentioned problems while retaining various advantages of the prior invention, the present inventors found that, in particular, when a ketone resin was selected as one of the components forming the polymer complex. We discovered that even in areas where ink dots are concentrated, the film in the ink-receiving area is strong, and that an ink-receiving layer without blocking or color transfer can be obtained even when the films are overlapped for a short time after printing, leading to the present invention. It is something.

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-bivinipiberidone, N-vinyl-4-methylpiperidone, N-vinyl-caprolactam, N-vinylcapryllactam, N-vinyl-3-
Morpholine, N-vinylthiopyrrolidone, N-vinyl-
Homopolymers such as 2-pyridone or random copolymers with other common monomers, block covalent polymers, graft copolymers, etc.; N-vinyl-2-oxazolidone, N-vinyl-5-methyl- 2-Oxacylidone, 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 with other common monomers, block copolymers, graft copolymers, etc.; N-vinylimidazole, N-vinyl-2- Homopolymers such as methylimidazole and N-vinyl-4-methylimidazole, or random copolymers with other common monomers, block copolymers, graft copolymers, etc.; 2- or 4-vinylpyridine, etc. Examples include homopolymers and random copolymers, block copolymers, graft copolymers, etc. with other common monomers.Other copolymerizable monomers that may be used in the above include methacrylates, acrylates, etc. , acrylamide, acrylonitrile, vinyl ether, vinyl acetate, vinylimidazole, ethylene, styrene and other common heptamers.

Particularly useful in the present invention are N-vinylpyrrolidone, N-vinylpiperidone, N-vinylcaprolactam, N-vinylmorpholine, N-vinyl-2-oxazolidone, and N-vinyl-5-methyl-2-oxazolidone. These include combinations, copolymers, etc. In the case of copolymers,
It is preferable that 50 mol % or more of the above-mentioned nitrogen-containing additives are included.

The basic polymers used above have a molecular weight of 500 or more, preferably 1,000 or more.

Among the above-mentioned basic polymers, particularly preferred in the present invention are those having tertiary amine groups, especially homopolymers and copolymers of vinylpyrrolidone having a molecular weight of 40,000 or more, particularly 300,000 or more. .

Further, the ketone resin capable of forming a polymer complex with the above-mentioned basic polymer is a light-colored thermoplastic resin obtained by addition and/or condensation of ketones and aldehydes such as formalin. Raw material ketones include methyl ethyl ketone, methyl isobutyl ketone,
Common ketones such as acetophenone, cyclohexanone, methylcyclohexanone are used.

These ketone resins themselves are known and can be easily produced by known methods, and various grades of ketone resins are readily available on the market, and any of them can be used in the present invention.

Particularly suitable in the present invention are those having an average molecular weight of about 10,000 or more, preferably 100,000 or more.

The present inventor further conducted various studies on the uses of these polymer complexes, and found that although these polymer complexes are extremely hydrophilic, they do not have water resistance,
It is moisture resistant, and when used to form an ink-receiving layer of an inkjet recording material, it showed ink receptivity equivalent to that of conventional water-soluble polymers, and gave an image of 1 g.
It was discovered that even under high humidity conditions, the surface did not become sticky at all, and the strength of the part of the ink-receiving layer that received ink was even stronger, making it difficult for the film to peel or break even when touched by fingers or objects. This is what I did. On the other hand, when a ketone resin is used alone, although the water resistance and alcohol resistance are good, only a hard and brittle layer with no ink receptivity can be formed, and it cannot be used as an ink receptive layer at all. Furthermore, terpene resins and olefin resins are relatively similar to ketone resins.

Even if a petroleum resin or the like is used in the same manner as in the present invention, the object of the present invention cannot be achieved, and an ink-receiving layer that is uniquely excellent in water resistance, ink-receptivity, etc. is obtained only with a ketone resin. there were.

Polymer complexes such as those described above generally do not dissolve in relatively poor solvents such as water, alcohols, esters, hydrocarbons, etc., so both polymers are dissolved in these poor solvents and the re-solutions are mixed. by 1
Polymer complexes for use in the present invention 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.

Therefore, the polymer complex used in the present invention means a polymer complex consisting of the above-mentioned components. (It can be prepared by a method similar to that described in the above publication.)

The present inventor further conducted various studies on the uses of these polymer complexes, and found that although these polymer complexes are extremely wood-friendly, they do not have water resistance,
When used to form an ink-receiving layer of an inkjet recording material, it exhibited ink-receptivity equivalent to that of conventional water-soluble polymers, giving clear images, and
It was discovered that even under high humidity conditions, the surface does not become sticky at all, and the strength of the part of the ink-receiving layer that receives ink is even stronger, and blocking phenomenon does not occur even when the films are stacked together within a short time after printing. This is what I did.

Further, the ratio of both polymers used is in a range such that the weight ratio of basic polymer/ketone resin is 20/1 to 1/10, and preferably, the basicity and acidity of each polymer are approximately equal. It is a percentage. If the weight ratio deviates from the above range, the bond between the components of one stroke will be insufficient, and the object of the present invention will not be fully achieved. That is, if there is too much basic polymer, water resistance will be reduced, and if too much ketone resin is used, ink receptivity will be reduced. In the above usage ratio, it is possible to form an ink-receiving layer that has particularly high strength and excellent ink-receptivity, image clarity, water resistance, ink resistance, and blocking resistance.

Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 59-174382, D
- Condensation products of sorbitol and benzaldehyde may be added in proportions of 0.1 to 50% by weight of the polymer complex.

The ink-receiving layer of the recording material of the present invention is formed using one or more polymer complexes such as those described above, but in the present invention, in addition to the polymer complexes described above, 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, gum arabic, natural resins such as sodium alginate, polyvinyl alcohol, modified polyvinyl alcohol, polyamide, polyacrylamide, quaternized polyvinylpyrrolidone, Polyethyleneimine, polyvinyl bilicylium halide, melamine resin, polyurethane, polyester,
Examples include synthetic resins such as sodium polyacrylate, and one or more of these materials may 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, alkyd 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.
Fillers such as talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, silicone aluminum, synthetic zeolite, alumina, zinc oxide, lithopone, satin white, and the like can also be dispersed in the ink-receiving layer.

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 examples of the opaque substrate include, for example, general paper, cloth, wood, metal plates, synthetic paper, and the like, as well as the above-mentioned transparent substrates treated to make them opaque by known means.

The recording material of the present invention is formed using the above-mentioned main materials, and the preferred embodiment of (1) is as follows.

Both the base material and the ink-receiving layer are translucent, and the in-line transmittance is 105 or more, and the entire recording material 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 is produced by forming a translucent ink-receiving layer on the translucent base layer from the above-mentioned polymer complex alone or a mixture with other translucent polymers. It can be prepared.

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, a method in which a transparent substrate is coated on the Murakami surface by a known method such as a roll coating method, a rod bar coating method, a spray coach ink method, an air knife coating method, etc., and then quickly dried, or a method in which a solution of a basic polymer or ketone resin is applied is applied. It is preferable to apply one of the solutions and then apply the other solution to form a polymer complex on the substrate.Also, a method of hot melt coating the above polymer complex alone or a mixture with other polymers, or a method of hot melt coating the above polymer complex alone or a mixture with other polymers, or Other methods may also be used, such as forming a single film for the ink-receiving layer from a material such as, and then laminating the film to the above-mentioned base material.

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, a 323-type Hitachi self-recording spectrophotometer (Hitachi made rupture). The Y value of the tristimulus value of the color is determined from the measured spectral transmittance, and is determined by the following equation.

T = Y/Y, X100 (1) T: Linear transmittance Y; Y value of sample Y, Y value of blank Place a planting bulb behind the bulb and calculate the transmittance including the diffused light.
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 the behavior of straight-line light is a problem with devices that use optical technology, it is important to evaluate the straight-line transmittance of the recording material when evaluating the translucency of the recording material to be used in these devices. Asking is especially important.

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 the test using the OHP test chart.

In order to obtain an image suitable for the above purpose, the in-line transmittance of the recording material needs to be 2% or more, and in order to obtain a clearer image, it is preferably 10% or more. 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 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.

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 base material is usually about 0.5 to 100 pm, preferably about 1 to 50 pm, more preferably 3 to 30 pm.
That's about it.

Furthermore, in the present invention, in the recording material of various embodiments such as one or more, fine organic or inorganic powder is applied to the recording surface of the recording material in an amount of about 0. By applying it at a rate of O1 to about 1.0 g/rr1', it is possible to further improve the transportability of the obtained recording material in the printer, blocking resistance during stacking, fingerprint resistance, etc.

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 H11 moderators, 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 full-color images as well as monochrome images, even if ink of different colors adheres repeatedly to the same location within a short period of time, there will be no ink flow or seepage phenomenon, and the strength of the ink-receiving layer will be reduced. Clear recorded images with high resolution can be obtained without any deterioration.

Moreover, unlike recording materials using conventional 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.

This superior performance under high humidity conditions is due to the intermolecular forces (e.g., intermolecular electrostatic forces, hydrogen bonds, van der Waalska, charge It is thought that some kind of weak bonding occurs to form a polymer complex, which exhibits excellent water resistance, blocking resistance, etc. even under high humidity conditions while maintaining high ink receptivity.

It was completely unexpected that the above-mentioned excellent effects could be achieved using a water-insoluble polymer complex.
This is because the ink is a wood-polyhydric alcohol mixture, so the applied ink temporarily dissolves or swells the ink-receiving layer of the recording material without reducing its film strength, making it easier to accept the ink. This is believed to be because the ink-receiving layer returns to its original water-insoluble polymer complex by absorption and evaporation of water after receiving the water. 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 1 part or % in the text is based on weight unless otherwise specified.

Examples 1 to 4 When a solution of polyvinylpyrrolidone (manufactured by GAF) and a solution of ketone resin were mixed in the formulation shown below, the mixed solution thickened and a polymer complex was formed. When this mixed solution is stirred for several minutes, it becomes a solution, which is used as a coating solution.

A polyethylene terephthalate film (manufactured by Toshi) with a thickness of 1,100 IL was used as a translucent base material, and a coating solution with the above composition was applied onto this film using a bar coater method so that the film thickness after drying was full m. 10% at 100°C.
The film was dried under conditions of 1 minute to obtain a translucent recording material of the present invention.

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

1" Polyvinyl vinyl OIJ ton (PVPK-90, manufactured by GAF)
10% [IMF solution IOO part Ketone resin (Hilac 9011 manufactured by Hitachi Chemical) 10% toluene solution 30 parts Polyvinylpyrrolidone (PVPK-90) 10% DMF
Solution 100 parts Ketone resin (Hilac TXT, manufactured by Hitachi Chemical) 10% toluene solution
20 Part Bunho 1” Polyvinylpyrrolidone (PVPK-90) 10% DNF
Solution 100 parts Ketone resin (Ketone resin -90, manufactured by Arayo Kagaku) 10% xylene solution 40 parts Comparative example 1
~3 A coating solution was prepared in the same manner as in the example using the following composition,
An ink-receiving layer was provided on the same polyethylene terephthalate film as used in the example in the same manner as in the example to obtain three types of recording materials for comparison.

Polyvinyl alcohol (PVA-217, manufactured by Kuraray) (
10% aqueous solution) Comparison 1λ Polyvinylpyrrolid y (PVPK-90, manufactured by GAF)
(10% aqueous solution) Polyvinylpyrrolidone (PVPK-90, manufactured by GAF) (
10% DMF solution) 100 parts Petroleum resin (0 stone Neopolymer 120, manufactured by Nippon Petrochemical) (10% toluene solution) 40 parts For the recording materials of the above examples and comparative examples, the following 4
On-demand inkjet recording head that uses seed ink to eject ink using a piezoelectric vibrator (discharge orifice diameter 60 m, piezoelectric vibrator drive voltage 70V)
, frequency 2 KHz).

Nami Eeno (composition) C, 1, Direct Yellow 86 2 parts diethylene glycol 25 parts polyethylene glycol #200 15 parts water
6 parts Riohjo no (composition) C, X, Acid Red 35 2 parts diethylene glycol 25 parts polyethylene glycol #200 15 parts water
60 parts LLU (composition) C, 1, Direct Blue 86 2 parts diethylene glycol 25 parts polyethylene glycol #200 15 parts water
Part 6 Part Evil Worker Z (composition) C, 1, Food Black 2 2 parts diethylene glycol 25 parts polyethylene glycol #200 15 parts water
Table 1 shows the evaluation results of the recording materials of 60 copies Examples, Comparative Examples, and Reference Examples.

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

(1) Ink fixation time is determined by leaving the recording material after recording at room temperature (20°C, 65% RH) and touching the recorded image with your finger, the ink will dry and will no longer stick to your finger. The time 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.
Judgment is made by visual observation. 0 indicates that the non-recorded area is bright, the recorded image has a high 00 (optical density), and a clear and easy-to-see projected image with high contrast is obtained, and 0 indicates that the non-recorded area is slightly dark and the recorded image is high. If the OD of the image is slightly low, the pitch width is 0.5@Peng, and the line with a thickness of 0.25 mm cannot be clearly distinguished, Δ, the non-recorded area is quite dark, the OD of the recorded image is quite low, and the pitch width is 1■ , Those in which a line of 0.3 cm in thickness could not be clearly distinguished, or in which it was impossible to distinguish between a non-recorded area and a recorded image, were marked as x.

(4) Linear transmittance was 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 9c11, and measuring the spectral transmittance as described in (1) above. ) was calculated using the formula.

(5) Machine runability is measured under the conditions of 35°C and 85% RH, when the recording material is loaded into the printer, the printer's feed roller cannot run due to the stickiness of the surface of the ink-receiving layer. Items that could not be evaluated were marked with an x, and items that were not were marked with an O.

(6) Fingerprint resistance was determined visually after wiping off the fingerprint-attached area on the film surface with a cloth. 20 points were measured, and fingerprint marks were visually confirmed at 12 or more points even after wiping.
, those less than that were set as 0.

(7) Water insolubility was determined by testing water resistance to water at a water temperature of 25° C. based on the water resistance test of JIS K5400.7.2. Those that were water resistant were judged to be insoluble in water, and those that were not water resistant were rated x.

(8) For blocking, after 1 hour of printing, high-quality paper was brought into close contact with the printed surface and stored for 12 hours. After storage, those in which no adhesion occurred between the recording material and the high-quality paper were rated as O, and those in which no adhesion occurred were rated as ×. Further, when a similar test was conducted 20 minutes after printing, those in which no adhesion occurred were rated as 0.

(Margin below) -n5-1-jyani

Claims (2)

[Claims] (1) An inkjet recording material comprising an ink-receiving layer provided on a base material, wherein the ink-receiving layer contains a polymer complex of a basic polymer and a ketone resin. (2) The inkjet recording material according to claim (1), wherein the basic polymer is polyvinylpyrrolidone.