JP3188596B2 - Recording material, method for producing the same, ink jet recording method, and method for producing printed matter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method using an ink, particularly to a recording material suitably used for an ink jet recording method, and more particularly, to a recording material having a sufficient surface gloss, a coloring property of a printed image, and an ink. A recording material having excellent receptivity and drying property of the surface after printing, hardly causing bending after printing drying, and hardly causing whitening phenomenon after forming an ink receiving layer, a method for producing the same, and an inkjet using the recording material. The present invention relates to a recording method and a method for manufacturing a printed matter.

[0002]

2. Description of the Related Art Ink jet recording methods include various ink (recording liquid) discharge methods, for example, an electrostatic suction method, a method in which a recording liquid is mechanically vibrated or changed using a piezoelectric element, and a method in which a recording liquid is heated and foamed. This is a recording method in which small droplets of ink are generated and made to fly by a method that uses the pressure, and a part or all of them are attached to a recording material such as paper. And recording methods capable of multicolor printing. The ink used in the ink jet recording method is mainly composed mainly of water from the viewpoints of safety and recording characteristics, and polyhydric alcohol or the like is used for preventing nozzle clogging and improving ejection stability. Is often added.

[0003] As a recording material conventionally used in a recording method using an ink (particularly, an ink jet recording method), a porous ink receiving material is used on ordinary paper or a substrate called an ink jet recording paper. A recording material provided with a layer is used.

[0004] However, with the improvement and spread of the performance of ink jet recording apparatuses and the like, such as high-speed recording and multi-color recording, recording materials are required to have higher and wider characteristics. That is, in order to obtain a high-resolution and high-quality recorded image, the recording material must: (1) be able to accept ink into the recording material as quickly as possible; (2) Even when ink dots overlap, ink that has adhered later does not flow into the dots that have adhered earlier. (3) The ink droplets do not diffuse on the recording material and the diameter of the ink dots does not become larger than necessary. (4) The shape of the ink dot is close to a perfect circle, and its circumference is smooth. (5) The OD (optical density) of the ink dot is high and the periphery of the dot is not blurred. It is necessary to satisfy basic requirements such as.

[0005] Furthermore, an optical device such as a slide or an OHP (overhead projector) is used to project a recorded image onto a screen or the like to observe the image, and a color separation for producing a positive plate for color printing. In a recording material used for a purpose such as a color mosaic filter (CFM) used for a color display such as a plate or a liquid crystal, mainly, transmitted light of a recorded image is a problem. Therefore, (6) excellent in light transmittance, especially in linear transmittance. Is required in consideration of the required performance of the above-described general recording material (particularly, a recording material for ink jet recording).

Many conventional recording materials for observing surface images are provided with a porous ink-receiving layer on the surface thereof, particularly for the purpose of increasing the ink absorption speed, and the recording liquid is received and fixed in the porous voids. Was used. However, the surface of the recording material was not glossy because of its porosity.

On the other hand, attempts have been made to use a water-absorbing polymer such as polyacrylic acid for the ink receiving layer. In particular, a water-absorbing polymer composed of polyacrylic acid and a neutralized salt of polyacrylic acid has a good film-forming property, a large amount of water absorption, and excellent transparency, and almost satisfies the acceptability and gloss of water in the ink. . However, many of these water-absorbing polymers are generally water-soluble, and the surface of the recording material swells at the time of receiving ink, and the surface layer of the recording material peels off when coming into contact with the recorded image, and the recorded image is damaged. There is a point.
When a polymer alone is used for the surface layer, the surface is likely to be non-porous, and non-volatile components such as polyhydric alcohol in the ink remain on the surface of the recording material for a long time after recording, and the ink is dried and fixed. Since the time is prolonged, bleeding of the ink occurs, and the recorded image is damaged if the recorded image comes into contact with the recorded image in the same manner as described above. In addition, polyacrylic acid has a problem that it is likely to bend after printing because of a large volume shrinkage upon evaporation of water.

On the other hand, there is a method in which a resin such as polyvinyl alcohol having excellent water resistance, a small volume shrinkage rate and a high water absorption rate is mixed with the above water-absorbing polymer. However, polyacrylic acid and polyvinyl alcohol generally have poor compatibility, and there is a problem that the film surface is whitened after film formation.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording method using ink (in particular, an ink jet recording method).
The recording material is preferably used, the surface gloss is sufficient, furthermore the color development of the printed image, excellent ink receptivity and drying of the surface after printing, less likely to bend after printing drying, It is an object of the present invention to provide a recording material in which whitening phenomenon hardly occurs after forming an ink receiving layer, a method for manufacturing the same, an inkjet recording method using the recording material, and a method for manufacturing a printed matter.

[0010]

According to the present invention, there is provided a recording material comprising a base material and an ink receiving layer provided on the base material, wherein the ink receiving layer has a water absorbing property. In a mixed solution containing a polymer, an alkoxysilane, and polyvinyl alcohol , a solge of the alkoxysilane is used.
The recording material is characterized by being formed by utilizing the reaction of a recording medium.

The method for producing a recording material of the present invention comprises the steps of:
In the method for producing a recording material having an ink receiving layer provided on the base material, the ink receiving layer may be formed in a mixed liquid containing at least a water-absorbing polymer, an alkoxysilane, and polyvinyl alcohol. In the said Arco
A method for producing a recording material, wherein the recording material is formed by a sol-gel reaction of xysilanes .

[0012] The recording method of the present invention is an ink jet recording method characterized by flying small ink droplets onto the recording material of the present invention and attaching the ink to the ink receiving layer.

The method for producing a printed matter according to the present invention is a method for producing a printed matter, characterized in that the recording material according to the present invention is produced by an ink jet recording method.

[0014]

The ink receiving layer of the recording material is a portion for receiving ink from a recording device of a recording apparatus or a recording apparatus during recording. Generally, the ink received by the ink adhering to the surface of the ink receiving layer is an ink receiving layer. It is performed by penetrating into fine voids in the structure of the layer mainly due to dissolution or swelling action. Factors that greatly affect such ink reception include the structure of the ink reception layer and the physical properties of the material constituting the ink reception layer. That is, the structure of the ink receiving layer is a structure through which the ink easily penetrates, and the ink receiving layer has an appropriate void volume for receiving and storing the ink. It is important that the material being used has an affinity for the ink.

Therefore, when the ink to be used is water-based, it is excellent to use a material having hydrophilicity as the material constituting the portion for absorbing and receiving the ink of the recording material (that is, the ink receiving layer). It is very effective for obtaining good ink receptivity. Further, the ink usually contains a polyhydric alcohol such as glycerin or diethylene glycol for preventing clogging of nozzles and adjusting viscosity. In this case, since the ink receiving layer must simultaneously receive not only water but also these non-volatile liquid media, it is necessary that the ink receiving layer be highly hydrophilic and have high affinity with these non-volatile media. Become.

Further, as other conditions to be satisfied as the ink receiving layer, it is important that the recording material swollen upon absorbing the ink does not peel off by contact, and that the printed material does not bend (generally called curl) after drying. It is.

Further, it is important that the ink is absorbed quickly and does not diffuse on the surface of the recording material. On the other hand, if the ink dot diameter is too small, the image density is reduced, so that it is necessary to appropriately spread the dot diameter. It is. Further, the coloring property of a printed image is also a required condition.

The present inventors have conducted intensive studies in consideration of the various points as described above. As a result, the ink receiving layer provided on the base material contains a water-absorbing polymer, a silica compound, and polyvinyl alcohol. In some cases, the present inventors have found that a recording material that satisfies the above-mentioned various conditions and simultaneously satisfies the gloss / light transmissivity and the quality of a recorded image can be obtained, and has completed the present invention. In particular, as a means for forming the ink receiving layer of the present invention, a sol-gel reaction of a silica compound utilizing hydrolysis of a metal alkoxide is performed in a mixed solution of polyacrylic acid and a neutralized product of polyacrylic acid and polyvinyl alcohol. To obtain an ink receiving layer that dramatically increases the compatibility between the above-mentioned different polymers, combines the water absorbing power of polyacrylic acid and the water resistance and low bending property of polyvinyl alcohol, and does not cause whitening after film formation. Can be.

Further, in the present invention, in the embodiment in which the silica compound of the ink receiving layer comprises a gel formed by a hydrolysis / polycondensation reaction of alkoxysilanes, the micropore structure of the gel and the swelling action of the water-absorbing polymer. As a result, the ink absorption speed is increased, so that the diffusion of ink dots is small, high image quality can be achieved, and more excellent characteristics can be obtained. Furthermore, the simultaneous use of the water-absorbing polymer and the gel improves the color development of the printed image, and improves the image density by appropriately widening the dot diameter.

Hereinafter, various aspects of the present invention will be described in detail.

The recording material of the present invention generally comprises a substrate as a support and an ink receiving layer provided on the surface thereof. The thickness of the ink receiving layer is preferably about 1 to 100 μm, and more preferably about 2 to 30 μm. Further, in order to increase the water absorption of the recording material as needed, between the ink receiving layer and the substrate, polyamide, polyvinylpyrrolidone,
A water absorbing layer of polyurethane or the like can be provided.

The water-absorbing polymer used in the ink-receiving layer of the recording material of the present invention is not particularly limited as long as it is capable of absorbing the ink based on its water-absorbing property and imparting the ink-receiving property to the ink-receiving layer. Although a water-soluble polymer can be used, a polyacrylate-based water-absorbing polymer comprising at least a polyacrylic acid and a neutralized salt of polyacrylic acid is particularly preferable. Also, this neutralized salt of polyacrylic acid is
It is preferable to contain at least one of Li, Na, K and an amine compound.

The total solid content of the ink receiving layer (100% by weight)
The weight ratio of the water-absorbing polymer is 30% by weight or more and 95% by weight.
% By weight or less, more preferably 50% by weight or more and 90% by weight or less. If the weight ratio of the water-absorbing polymer is too large, swelling due to ink absorption becomes remarkable, and the receiving layer tends to be sticky. On the other hand, if the weight ratio of the water-absorbing polymer is too small, the amount of ink absorbed is insufficient and the printed image tends to bleed.

The silica compound used in the ink receiving layer of the recording material of the present invention is preferably a gel formed by a hydrolysis / polycondensation reaction of alkoxysilanes. That is, those obtained by gelation by a sol-gel reaction utilizing a hydrolysis-polymerization reaction of a metal alkoxide can be suitably used.

The alkoxysilanes include Si-
(OR) ₄ (wherein, R represents an alkyl group, a phenyl group, or an alkoxy group which may have a substituent). Specific examples include tetraethyl silicate and tetramethyl silicate. In addition, not limited to tetrafunctional siloxane, silicon halides such as dichlorosilane and trichlorosilane, and alkoxysilanes can also be used.

The total solid content of the ink receiving layer (100% by weight)
The weight ratio of the silica compound therein is preferably from 1% by weight to 80% by weight, more preferably from 3% by weight to 50% by weight. If the weight ratio of the silica compound is too large, the flexibility of the ink absorbing layer is reduced and cracks and the like tend to occur. On the other hand, when the weight ratio of the silica compound is too small, fine pores of the ink absorbing layer are not easily formed, and the ink absorbing speed is slowed, and ink bleeding tends to occur.

The polyvinyl alcohol (hereinafter referred to as PVA) used in the ink receiving layer of the recording material of the present invention is such that the weight ratio of PVA to the total solid content (100% by weight) of the ink receiving layer is 10% by weight or more. It is preferably 80% by weight or less,
The content is more preferably from 0% by weight to 70% by weight. This PV
If the weight ratio of A is too large, the amount of ink absorbed by the fine pores of the gel decreases, and ink bleeding tends to occur. On the other hand, if the weight ratio of PVA is too small, the density and color developability tend to decrease, and film peeling during contact due to swelling and curling after printing tend to occur.

The preferred range of the degree of saponification of PVA in the present invention is 30% or more and less than 100%, and more preferably 50% or more and less than 100%. If the saponification degree is too small, the rate of absorption of water in the ink becomes slow, and ink bleeding tends to occur. Also, P
If the degree of saponification of VA is too large, the rate of absorption of polyhydric alcohol or the like in the ink becomes slow, and the ink tends to be easily attached at the time of contact immediately after printing.

In the present invention, as a substrate used as a support of the ink receiving layer, any conventionally known substrate can be used regardless of transparency or opacity. Suitable transparent substrates include, for example, films or plates of polyester resins, diacetate resins, triacetate resins, acrylic resins, polycarbonate resins, polyvinyl chloride resins, polyimide resins, cellophane, celluloid, and glass plates And the like. Suitable opaque substrates include, for example, general paper, cloth, wood, metal plate, synthetic paper, and the like, and those obtained by subjecting the above-mentioned transparent substrate to opacity treatment by a known means.

The method for forming the ink receiving layer of the recording material of the present invention is not particularly limited as long as it can form an ink receiving layer from at least a water absorbing polymer, a silica compound and PVA. However, in the embodiment in which the silica compound is a gel formed by a hydrolysis / polycondensation reaction of alkoxysilanes, in particular, a sol-gel reaction utilizing a hydrolysis-polymerization reaction of a metal alkoxide is carried out in polyacrylic acid and polyacrylic acid. It is desirable to carry out the method in a mixed solution of a water-absorbing polymer such as a polyacrylate and a PVA and PVA. According to this method,
In particular, an ink receiving layer which dramatically increases the compatibility between the above-mentioned different polymers, combines the water absorbing power of polyacrylic acid, the water resistance of PVA, and the low bending property, and does not cause whitening after film formation. Can be obtained. Specifically, a mixed solution of a silica compound to form a gel, polyacrylic acid and a polyacrylic acid-neutralized product and PVA is supplied on a substrate by coating or the like, and the mixed solution is heated and heated to form a metal in the mixed solution. It is preferable to form an ink receiving layer by causing a sol-gel reaction of a silica compound utilizing hydrolysis of an alkoxide, and curing the coating film by gelation of the silica compound.

Further, if necessary, other than the above-mentioned coating method, a cast coating method may be used, or gloss may be provided by a gloss roll.

Further, for example, a curl due to volume shrinkage after printing can be further prevented by applying a resin coat on the back surface of the base material. Examples of resins that can be used include general thermoplastic resins and thermosetting resins. Further, the same coat layer as the ink receiving layer formed on the surface may be provided.

In the ink receiving layer of the recording material of the present invention, various polymers can be used in addition to the above essential components as required. Preferred examples of other polymers that can be used by mixing with PVA in the present invention include natural resins such as albumin, gelatin, casein, starch, cationic starch, gum arabic, and sodium alginate; polyamides, polyacrylamides, polyvinylpyrrolidone, and quaternary resins. Polyvinylpyrrolidone, polyethyleneimine, polyvinylpyridium halide, melamine resin, polyurethane, polyester, sodium polyacrylate, SBR latex, NBR
Latex, polyvinyl formal, polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, a synthetic resin such as a phenol resin, an alkyd resin, and the like, and one or more of these resins are used as desired.

It is preferable to disperse inorganic particles such as SiO ₂ and Al ₂ O ₃ in the ink receiving layer in order to increase the ink absorption speed. The mixing ratio of PVA and inorganic particles is such that the inorganic particle component is 7 to PVA 30 to 80% by weight.
0 to 20% by weight, and PVA 50 to 8
It is preferable that the inorganic particle component is 50 to 20% by weight based on 0% by weight. If the amount of the inorganic particles is too large, the white turbidity of the film becomes conspicuous and the transparency tends to deteriorate. Also,
When the amount of the inorganic particles is too small, the effect of increasing the ink absorption speed tends to be hardly obtained.

In the ink receiving layer, a filler such as clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, synthetic zeolite, zinc oxide, lithopone, and satin white may be dispersed. it can.

The ink receiving layer may also contain various known additives such as a dispersant, a fluorescent dye, a pH adjuster, an antifoaming agent, a lubricant, a preservative, and a surfactant.

The recording material of the present invention may be formed by using the essential or optional main material as described above. However, if the recording material needs to be translucent as a whole, Both the ink-receiving layer and the ink-receiving layer may be made light-transmitting. The recording material of this embodiment is used for, for example, an OHP or the like that projects a recorded image on a screen or the like by an optical device, and is useful as a recording material for transmitted light observation.

Such a translucent recording material is made of P
It can be adjusted by forming a light-transmitting ink receiving layer from VA alone, a mixture of PVA and inorganic particles, or a mixture of other light-transmitting polymers. Here, the translucent ink refers to an ink in which the recording material has a linear transmissivity of 10% or more. When the linear transmittance is 10% or more, the recorded image can be projected on a screen by, for example, OHP, and the details of the recorded image can be clearly observed. The linear transmittance (%) refers to a straight line that is perpendicularly incident on a sample, penetrates the sample, passes through a light receiving side slit that is at least 8 cm or more away from the sample, and extends through a light receiving side slit, and is received by a detector. The spectral transmittance of light is measured using, for example, a 323 type Hitachi automatic recording spectrophotometer (manufactured by Hitachi, Ltd.), and the Y value of the color tristimulus value is determined from the measured spectral transmittance. This is the value obtained from I).

T = Y / Y ₀ × 100 (I) (T: linear transmittance, Y: Y value of sample, Y ₀ : Y value of blank) That is, the linear transmittance as referred to in the present invention is a straight line. For light, diffuse transmittance (a light-transmitting factor including diffused light is provided by installing an integrating sphere behind the sample) and opacity (white and black backing This is different from the method of evaluating the translucency by diffused light.

Since the behavior of linear light poses a problem in devices utilizing optical technology, etc., it is necessary to evaluate the linearity of the recording material when evaluating the light transmittance of the recording material to be used in those devices. It is particularly important to determine the light transmittance. For example, OH
When observing the projection image at P, the contrast between the recording portion and the non-recording portion is high, and in order to obtain a clear and easy-to-view image, the non-recording portion in the projection image must be bright, that is, the linear transmittance of the recording material must be high. It is required to be above a certain level. In an OHP test using a test chart, it is necessary that the recording material has a linear transmittance of 2% or more in order to obtain an image suitable for this purpose, and 10% or more in order to obtain a clearer image. Is done. Therefore, a recording material suitable for this purpose needs to have a linear transmittance of 10% or more. However, the recording material of the present invention does not necessarily need to be colorless, and may be a colored recording material.

The glossy surface in the present invention is defined as:
It means that the 45 ° specular gloss based on JIS Z8741 is 30% or more. This type of recording material is particularly useful as a recording material for surface image observation which is excellent in surface gloss and excellent in full-color and clearness. The recording material in this embodiment may be transparent or opaque, and any of the above-mentioned transparent and opaque substrates can be used. Further, the ink receiving layer formed on these substrates may be transparent or opaque. The materials and methods used for forming the ink receiving layer are the same as those described above, but the filler and the like are used to such an extent that the ink receiving layer becomes opaque as long as the surface of the ink receiving layer can maintain smoothness. You can use it.

Although the present invention has been described with reference to typical embodiments of the recording material of the present invention, the present invention is, of course, not limited to these embodiments.

Further, by using the recording material of the present invention, it is possible to favorably perform an ink jet recording method in which ink droplets are made to fly on the recording material and the ink is attached to the ink receiving layer. If necessary, full-color recording can be performed satisfactorily. In addition, a good printed matter can be manufactured by performing the ink jet recording method on the recording material of the present invention.

[0044]

The present invention will be described in more detail with reference to the following examples. In the following description, “parts” means “parts by weight” unless otherwise indicated.

<Example 1> A light-transmitting substrate having a thickness of 100
Using a polyethylene terephthalate film having a thickness of μm (manufactured by Toray Industries, Inc.), a polyurethane resin was coated on the film by a roll coating method to a thickness of about 0.5 μm and dried to obtain a support. A liquid obtained by mixing the coating liquids (1a) and (1b) having the following composition on the support is applied by an applicator so that the film thickness after drying is 25 μm.
Drying was performed at 110 ° C. for 10 minutes to form an ink receiving layer on the substrate.

Coating liquid (1a) Polyacrylic acid (20% aqueous solution) 100 parts LiOH (10% aqueous solution) 20 parts Benzylamine 18 parts PVA (10% aqueous solution, saponification degree 80%) 40 parts MeOH 30 parts Liquid (1b) Tetraethyl silicate 4 parts 2N-hydrochloric acid 0.04 parts MeOH 17 parts The recording material thus obtained was colorless and transparent.
The recording material was subjected to ink-jet recording using an ink-jet copying machine (manufactured by Canon, trade name: PIXELJET) with the ink for the same machine, and the color development of the image was good. No surface layer was peeled off, and the ink on the surface of the recorded image was dried within 2 minutes after printing. Furthermore, there was no dot bleeding, and the solid density was sufficient. Also, even after drying after printing, the degree of curling was small. Table 1 shows the evaluation results. In addition, each evaluation item specifically followed the following measuring method.

(1) Ink fixing time After recording, the recording material is allowed to stand at room temperature, and plain paper is pressed against the recorded image at a pressure of 0.5 kg / cm ² to remove the ink and the surface layer from the paper. The time at which no longer adhered was measured.

(2) OHP suitability Measured as a representative example of optical equipment, and the recorded image
An image projected on a screen by an HP and visually observed was used for determination, in which a non-recorded portion was bright, an OD (optical density) of a recorded image was high, and a clear, easy-to-view projected image with high contrast was obtained (（). The OD of the recorded image is slightly lower, the OD of the recorded image is slightly lower, and the pitch width is 0.
A line whose line of 5 mm and thickness of 0.25 mm cannot be clearly discriminated is indicated by (△).
A sample having a very low D and a line having a pitch width of 1 mm and a thickness of 0.3 mm cannot be clearly discriminated, or a sample in which a non-recorded portion and a recorded image cannot be distinguished from each other were designated as (x).

(3) Linear transmittance 323 type Hitachi automatic recording spectrophotometer (manufactured by Hitachi, Ltd.)
And the distance from the sample to the receiving side mado is about 9
cm, the spectral transmittance was measured, and determined by the above-mentioned formula (I).

(4) Gloss The 45 ° specular gloss of the surface of the recording material was measured based on JIS Z8741.

<Example 2> A colorless and transparent light-transmitting material was prepared in the same manner as in Example 1 except that the coating solutions (2a) and (2b) having the following compositions were used instead of the coating solution of Example 1. A recording material was obtained.

Coating liquid (2a) Polyacrylic acid (20% aqueous solution) 100 parts LiOH (10% aqueous solution) 20 parts Benzylamine 20 parts PVA (10% aqueous solution, saponification degree 80%) 30 parts MeOH 30 parts Liquid (2b) Tetraethyl silicate 2 parts Tetramethyl silicate 2 parts 2N-hydrochloric acid 0.04 parts MeOH 17 parts When this recording material was evaluated in the same manner as in Example 1, similarly good results were obtained. . Table 1 shows the results.

Example 3 A colorless and transparent light-transmitting material was prepared in the same manner as in Example 1 except that the coating solutions (3a) and (3b) having the following compositions were used instead of the coating solution of Example 1. A recording material was obtained.

Coating solution (3a) Polyacrylic acid (20% aqueous solution) 100 parts NaOH (10% aqueous solution) 20 parts Benzylamine 18 parts PVA (10% aqueous solution, saponification degree 80%) 20 parts MeOH 30 parts Liquid (3b) Tetraethyl silicate 2 parts Tetramethyl silicate 2 parts 4N-acetic acid 0.7 parts MeOH 17 parts When this recording material was evaluated in the same manner as in Example 1, similarly good results were obtained. . Table 1 shows the results.

<Example 4> A recording material was obtained in the same manner as in Example 1 except that art paper was used as the substrate instead of the polyethylene terephthalate film of Example 1.
The obtained recording material was white and glossy. When the same evaluation as in Example 1 was performed on this recording material, similarly good results were obtained. Table 1 shows the results.

<Comparative Example 1> The coating solution (C1) was applied and dried on the support obtained in Example 1 in the same manner as in Example 1.

Coating solution (C1) Polyacrylic acid (10% aqueous solution) 40 parts Sn ₂ O ₃ (5% aqueous solution) 8 parts Al ₂ O ₃ (5% aqueous solution) 10 parts MeOH 42 parts Recording material obtained Was colorless and transparent. The same evaluation as in Example 1 was performed on this recording material. As a result, the adhesion of the solid film was observed immediately after printing, and the adhesion of ink to the paper was observed even 7 minutes or more after printing. . The curl after printing and drying was large. Table 1 shows the results.
Shown in

[0058]

[Table 1]

[0059]

As described above, the recording material of the present invention has a sufficient surface gloss, is excellent in the color developing property of the printed image, the ink receptivity and the drying property of the surface after printing, and has a shape after printing and drying. It is a recording material that hardly causes change (bend) and hardly causes a whitening phenomenon after the formation of the ink receiving layer. If necessary, the recording material can have excellent transparency.

Further, the method for manufacturing a recording material of the present invention is a method that can easily and satisfactorily produce a recording material having the above-described excellent characteristics.

The ink jet recording method and the method for producing a printed matter of the present invention are capable of forming a good recorded image by using a recording material having excellent characteristics as described above. And good full-color recording is also possible.

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masataka Kawahara 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc. (56) References JP-A-62-218180 (JP, A) JP-A-60 JP-A-1618651 (JP, A) JP-A-59-230787 (JP, A) JP-A-62-292476 (JP, A) JP-A-63-125386 (JP, A) JP-A-63-264391 (JP, A) JP-A-4-272888 (JP, A) JP-A-6-228467 (JP, A) JP-A-6-135124 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41M 5/00 B41J 2/01

Claims (8)

(57) [Claims] 1. A recording material having a substrate and an ink receiving layer provided on the substrate, wherein the ink receiving layer comprises:
In a mixture containing a water-absorbing polymer, alkoxysilanes and polyvinyl alcohol ,
A recording material formed by utilizing a sol-gel reaction of orchids . 2. The method according to claim 1, wherein the alkoxysilane is Si— (OR)
₄ (where R is an optionally substituted alkyl group, a phenyl group, an alkoxy group.) Composed of at least one or more of the compounds represented by the claims 1 recording material according. 3. The water-absorbing polymer comprises at least a polyacrylic acid and a neutralized salt of polyacrylic acid.
Or the recording material according to 2 . 4. The recording material according to claim 3 , wherein the neutralized salt of polyacrylic acid contains at least one of Li, Na, K and an amine compound. 5. A method for producing a recording material having a base material and an ink receiving layer provided on the base material, wherein the ink receiving layer comprises at least a water-absorbing polymer and an alkoxysilane.
Containing orchids and polyvinyl alcohol
A method for producing a recording material, which is formed by a sol-gel reaction of the alkoxysilanes in a mixed solution . 6. After supplying a mixed solution containing an alkoxysilane, a water-absorbing polymer, and polyvinyl alcohol onto a substrate, the alkoxysilane is gelled by a hydrolysis / polycondensation reaction to form an ink receiving layer. Claims to form
6. The method for producing a recording material according to item 5 . 7. An ink jet recording method, characterized in that ink droplets are made to fly on a recording material according to any one of claims 1 to 4 , and the ink is attached to the ink receiving layer. . 8. The process for producing printed matter, characterized in that to produce the ink jet recording method in a recording material according to one of claims 1 to 4.