JPH0858227A - Recording medium, image forming method using the same, recorded matter and production thereof - Google Patents

Abstract

PURPOSE: To obtain an ink jet recording medium having metal gloss by providing an ink barrier layer on at least the single surface of metal foil and forming an ink absorbing layer on the ink barrier layer. CONSTITUTION: An ink barrier layer composed of one or more kind of a film having ink barrier effect selected from a polyolefin film and a polyester film is formed on at least the single surface of a bass material composed of metal foil formed from gold or the like by metallizing one surface of the film. Subsequently, an ink receiving layer is formed on the other surface of the film and at least one of the metal foil, the ink barrier layer and the ink receiving layer is colored. Further, a metal corrosion preventing layer is provided on the rear surface of the printing surface of the ink receiving layer and the thickness of the whole is set to 500μm or less. Then, ink prepared based on water being a liquid medium component and a water-soluble org. solvent is used to form an image by an ink jet system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium suitable for ink jet recording, an image forming method using the same, a recorded matter having metallic luster, and a method for producing the same.

[0002]

2. Description of the Related Art Ink jet recording methods include various ink ejection methods such as an electrostatic suction method, a method in which a piezoelectric element is used to mechanically vibrate or displace ink, ink is heated to foam, and the pressure is used. In this method, small droplets of ink are generated and ejected, and part or all of them are attached to a recording material such as paper or a plastic film coated with an ink receiving layer for recording. It is attracting attention as a method that can generate high-speed printing and multicolor printing with less noise.

As the ink used in the ink jet recording system, one mainly containing water is used in terms of safety and recording characteristics, and it is a multi-valued ink for preventing nozzle clogging and improving ejection stability. Alcohols are often added.

Conventionally, various types of paper, OHP film, glossy film, cloth and the like have been developed and provided to users as recording media used for ink jet recording. However, a recording medium having metallic luster as an inkjet recording medium has not yet been developed and sold.

On the other hand, in general commercial printing, those printed on aluminum foil are used as posters, and even in the field of ink jet printing, they have metallic luster in the form of posters, labels, stickers, etc. There is an increasing demand for printing on recording media.

Inkjet printing on a recording medium having a metallic luster based on aluminum foil or the like can be performed by simply providing an ink receiving layer on the aluminum foil, copper foil or the like. However, when stored for a long time after printing with water-based ink, there are problems that moisture, dyes, etc. contained in the ink react with metals such as aluminum and copper, metallic luster is lost over time, and metal foil corrodes. .

Although a method of ink-jet recording directly on the surface of aluminum metal has been developed, the surface of aluminum needs to be porous in order to allow the dye contained in the ink to penetrate into the metal, and a metal such as aluminum foil is required. It is difficult to give gloss, and it is preferable that the thickness of aluminum is thick, so that there is a problem that it cannot be conveyed by an ordinary inkjet recording apparatus.

[0008]

In recent years, with the improvement in the performance of ink jet recording apparatuses such as high speed recording and multicolor recording, more advanced and wide range characteristics have been required for ink jet recording media. .

That is, (1) the ink absorption capacity is high (the absorption capacity is large, the absorption time is fast), (2) the optical density of the dots is high, and the periphery of the dots is not blurred. (3) the dot shape is a perfect circle. (4) The characteristics do not change due to changes in temperature and humidity, and curl does not occur (5) Blocking does not occur (6) Images are stable for long-term storage and do not deteriorate That (especially,
(Under high temperature and high humidity environment) (7) It is required that the recording medium itself is stable and does not deteriorate during long-term storage (especially under high temperature and high humidity environment).

In addition, as the recording speed, image density, color, and ink diversification progress,
Various recording media have been required.

Therefore, an object of the present invention is to provide a recording medium suitable for an ink jet system having metallic luster, an image forming method using the same, a recorded matter having metallic luster, and a method for producing the same. Another object of the present invention is to provide a recording medium that is stable over time and does not lose its metallic luster even when an aqueous ink is used, and an image forming method using the same.

[0012]

The above object can be achieved by the present invention described below.

That is, the present invention is a recording medium having an ink shielding layer on at least one surface of a metal foil, and an ink receiving layer provided on the ink shielding layer, which has an ink shielding effect. Evaporate metal on one side of the film,
A recording medium having an ink receiving layer on the other surface.

In these recording media, the ink shielding layer is one or more films selected from polyolefins and polyesters, and the film having an ink shielding effect is one or two films selected from polyolefins and polyesters. It is a film of more than one kind, a metal foil,
At least one of the ink shielding layer and the ink receiving layer is colored, and at least one of the film having an ink shielding effect and the ink receiving layer is colored, and the metal foil is one of gold foil, silver foil, copper foil, and aluminum foil. The metal to be vapor-deposited is gold, silver, copper, or aluminum, and a metal corrosion-preventing layer is provided on the back side of the printing surface of the ink receiving layer, and the total thickness is 500 μm or less. Including.

Further, the present invention is an image forming method characterized in that an image is formed on the above-mentioned recording medium by an ink jet system, wherein the liquid medium component of the ink is water and a water-miscible glycol or glycol ether. The ink is cyan, magenta, yellow, and black ink, and the surface tension of black ink is higher than that of cyan, magenta, and yellow ink. And a method of ejecting ink by operating

Furthermore, the present invention is a method for producing a recorded matter, characterized in that an image is formed on the above-mentioned recording medium by an ink jet method to obtain a recorded matter having a metallic luster.

The present invention is a recorded matter, wherein an image is formed on the recording medium with ink dots.

[0018]

The present inventors have developed a recording medium having a metallic luster suitable for ink jet recording, and the recording medium has excellent metallic luster and is provided with an ink shielding layer so that Therefore, they have found that they have a stable metallic luster permanently, and have completed the present invention.

That is, as a first structure, an ink shielding layer is provided on at least one surface of the metal foil, and an ink absorbing layer is formed on the ink shielding layer.

As a second structure, a metal is adhered to a substrate having an ink shielding property by a method such as vapor deposition, and an ink receiving layer is formed on the side opposite to the metal adhering layer.

Next, the present invention will be described in more detail with reference to preferred embodiments.

The metal used as the base material in the present invention is
Examples thereof include gold, silver, copper, and aluminum, but various metals can be used according to the purpose, and the present invention is not limited to these.

Further, the metal film may have a smooth surface, or may have a printing surface or unevenness for the purpose of decoration or the like.

The ink shielding layer substrate used in the present invention is made of a plastic such as polyethylene terephthalate, diacetate, triacetate, cellophane, celluloid, polycarbonate, polyimide, polyvinyl chloride, polyvinylidene chloride, polyacrylate, polyethylene, polypropylene. A film, a glass plate, or the like can be used.

The surface of the base material may be smooth or uneven, and may be transparent or translucent. Also, two or more kinds of these base materials may be stuck to each other. Further, a mat layer, a release adhesive layer, etc. may be provided on the side opposite to the printed surface. After printing, an adhesive layer or the like may be provided on the printed surface.

It is appropriately selected from the above-mentioned base materials depending on the recording purpose of the recording medium, the use of the recorded image, or various conditions such as adhesion to the composition coated on the recording medium.

Further, any of the metal surface, the ink shielding layer and the ink receiving layer may be colored depending on the purpose. For example, when aluminum foil is used, a gold film can be produced by coloring the ink shielding layer yellow, and a copper film can be produced by coloring the ink shielding layer in reddish brown.

When coloring the ink-shielding layer, it is desirable to give highly transparent coloring so as not to impair the metallic luster, and the coloring method may be appropriately selected, but it is generally dyed with a dye. desirable.

In the recording medium of the present invention, when the metal foil is exposed, corrosion of the metal foil may occur due to moisture in the air during storage. Therefore, if necessary, an oxide film may be used to prevent corrosion. A corrosion prevention layer may be or is preferably provided.

The material constituting the ink receiving layer is not particularly limited, but is particularly limited as long as it is capable of receiving a so-called aqueous ink and has solubility or affinity for the aqueous ink. However, for example, polyvinylpyrrolidone, polyvinyl alcohol, anion-modified polyvinyl alcohol, cation-modified polyvinyl alcohol, polyurethane, carboxymethyl cellulose, polyester, polyacrylic acid (ester),
Examples thereof include synthetic resins such as hydroxyethyl cellulose, cationized hydroxyethyl cellulose, melamine resin, and modified products thereof, and natural resins such as albumin, gelatin, casein, starch, cationized starch, gum arabic, and sodium alginate. It is also possible to use a plurality of these simultaneously.

Further, a water-dispersible resin may be used as a constituent material of the ink receiving layer, for example, polyvinyl acetate,
Ethylene-vinyl acetate copolymer, polystyrene, styrene- (meth) acrylic acid ester copolymer, (meth) acrylic acid ester-based polymer, vinyl acetate- (meth) acrylic acid (ester) copolymer, poly (meth ) Acrylamide, (meth) acrylamide copolymer, styrene-
Isoprene copolymer, styrene-butadiene copolymer,
A large number of ethylene-propylene copolymers, polyvinyl ethers and the like can be listed.

A plurality of these water-soluble resins and water-dispersible resins may be used at the same time.

Further, in the sense of improving the image storability,
You may further contain a cationic compound.

The cationic compound is not particularly limited as long as it contains a cationic moiety in the molecule, and examples thereof include monoalkylammonium chloride, dialkylammonium chloride, tetramethylammonium chloride, trimethylphenylammonium chloride and ethylene. Quaternary ammonium salt-type cationic surfactants such as oxide-added ammonium chloride, or amine salt-type cationic surfactants, and further alkylbetaines containing a cationic moiety, imidazolium-betaine, alanine-based surfactants, etc. An amphoteric surfactant may be used.

As the polymer or oligomer, a cation-modified polyacrylamide or a copolymer of acrylamide and a cationic monomer, polyallylamine, polyamine sulfone, polyvinylamine, polyethyleneimine, polyamide-epichlorohydrin resin, polyvinylpyridinium halide and the like can be used. Can be mentioned.

Further, a vinylpyrrolidone-based monomer alone or a copolymer with another general monomer, a vinyloxazolidone-based monomer alone or a copolymer with another general monomer, a vinylimidazole-based monomer Examples thereof include a single substance or a copolymer with another general monomer.

Examples of the above-mentioned general monomers include methacrylate, acrylate, acrylonitrile, vinyl ether, vinyl acetate, ethylene and styrene.

The above cationic compounds are preferably used, but they may be used alone or in combination of two or more, and a low molecular weight cationic substance and a high molecular weight cationic substance may be used in combination.
Of course, it is not limited to these.

As a matter of course, in the constitution according to the present invention, the above-mentioned cationic compound is not an essential component but merely shows an auxiliary role.

Furthermore, a cross-linking agent may be included, such as, but not limited to, methylolated melamine, methylolated urea, methylolated hydroxypropylene urea, and isocyanate.

Various fillers and additives can be used in combination in the ink receiving layer within the range not hindering the achievement of the object of the present invention.

Examples of the filler include silica, alumina, aluminum silicate, magnesium silicate, basic magnesium carbonate, talc, clay, hadodaltalsite, calcium carbonate, titanium oxide, zinc oxide, and polyethylene, polystyrene, polyacrylate. Examples thereof include, but are not limited to, plastic pigments and the like.

Specific examples of additives include various surfactants, dye fixing agents (waterproofing agents), defoaming agents, antioxidants,
Optical brightener, ultraviolet absorber, dispersant, viscosity modifier, PH
Examples include regulators, antifungal agents, and plasticizers. These additives may be arbitrarily selected from conventionally known compounds according to the purpose.

In preparing the ink receiving layer of the recording medium of the present invention, the composition is dissolved in water or alcohol, polyhydric alcohol, or other suitable organic solvent together with other additives, if necessary. , Or dispersed,
Adjust the coating liquid.

The obtained coating liquid is applied, for example, to a roll coater method, a blade coater method, an air knife coater method, a gate roll coater method, a bar coater method, a size press method, a spray coat method, a gravure coater method, a curtain coater method, etc. To coat the surface of the substrate. After that, it is dried using, for example, a hot-air drying oven or a heating drum to obtain the recording medium of the present invention.

The total coating amount of the ink receiving layer is 0.2 to 50 g / m ² , more preferably 1 to 30 g / m 2.
It is within the range of ² . When the coating amount is small, a part of the substrate may be exposed on the surface. Also, the coating amount is 0.2 g /
When it is less than m ² , it is not effective in terms of color development of the paint as compared with the case where the ink receiving layer is not provided.
When the amount exceeds 0 g / m ² , the occurrence of curling is remarkable especially in a low temperature and low humidity environment. When the coating amount is expressed by thickness, the coating amount is preferably in the range of 0.5 to 100 μm.

In the case of forming an image on the recording medium described above by using the ink jet method, the ink itself is
Known materials can be used without any problems. As the recording agent, a direct dye, an acid dye, a basic dye, a reactive dye, a water-soluble dye typified by an edible dye, a dispersible dye, and a pigment can be used. If there is no particular limitation, it can be used.
Such water-soluble dyes or dispersible dyes or pigments are generally used in a proportion of about 0.1 to 20% by weight in conventional inks, and the same may be applied to the present invention.

The solvent used in the water-based ink used in the present invention is water or a mixed solvent of water and a water-soluble organic solvent, and a particularly preferable solvent is a mixed solvent of water, a water-soluble organic solvent and a water-soluble solvent. As the organic solvent, a polyhydric alcohol having an effect of preventing ink drying is contained.

The method for applying the above-mentioned ink to the above-mentioned recording medium for recording is preferably an ink jet recording method, and this method is a range in which the ink is effectively separated from the nozzle. Any method may be used as long as it can apply ink to the recording medium.

Particularly, in the method described in Japanese Patent Laid-Open No. 54-59936, the ink subjected to the action of thermal energy causes a rapid volume change, and the action force due to this state change ejects the ink from the nozzle. The inkjet method can be effectively used.

An example of an ink jet recording apparatus suitable for recording using the recording medium of the present invention will be described below. An example of a head configuration that is a main part of the apparatus is shown in FIGS.
And shown in FIG.

The head 13 is made of glass, ceramics or a plastic plate having a groove 14 through which ink passes, and a heat generating head 15 used for heat-sensitive recording (a head is shown in the drawing, but is not limited to this). It is obtained by bonding and. The heating head 15 includes a protective film 16 made of silicon oxide, aluminum electrodes 17-1 and 17-.
2. A heating resistor layer 18 made of nichrome or the like, a heat storage layer 19, and a substrate 20 having a good heat dissipation property such as alumina.

The ink 21 is a discharge orifice (fine hole) 2
2, the meniscus 23 is formed by the pressure P.

Now, when an electric signal is applied to the electrodes 17-1 and 17-2, the area indicated by n of the heating head 15 rapidly generates heat, and bubbles are generated in the ink 21 in contact therewith,
The meniscus 23 is projected by the pressure, the ink 21 is ejected, becomes a recording droplet 24 from the orifice 22, and flies toward the recording medium 25. FIG. 3 shows an external view of a multi-head in which many heads shown in FIG. 1 are arranged. The multi-head is manufactured by closely contacting a glass plate 27 having a multi-groove 26 and a heating head 28 similar to that described in FIG.

Incidentally, FIG. 1 shows the head 1 along the ink flow path.
3 is a sectional view of FIG. 3, and FIG. 2 is a sectional view taken along the line AB of FIG. 1.

FIG. 4 shows an example of an ink jet recording apparatus incorporating such a head. In FIG. 4, 61
Is a blade serving as a wiping member, one end of which is held by a blade holding member to be a fixed end, which is in the form of a cantilever. The blade 61 is disposed adjacent to the recording area by the recording head, and in the case of this example, is held in a protruding form in the movement path of the recording head. Reference numeral 62 denotes a cap, which is disposed at a home position adjacent to the blade 61, and has a configuration in which it moves in a direction perpendicular to the moving direction of the recording head and contacts the ejection port surface to perform capping. Further, 63 is an ink absorber provided adjacent to the blade 61, and like the blade 61,
The recording head is held in a protruding form in the moving path of the recording head.
The blade 61, the cap 62, and the absorber 63 constitute a discharge recovery unit 64, and the blade 61 and the absorber 6
By the means 3, water, dust and the like are removed from the ink ejection port surface.

Reference numeral 65 denotes a recording head having ejection energy generating means, which ejects ink onto a recording medium facing the ejection port surface on which ejection ports are arranged for recording, and 66 denotes a recording head 65 on which the recording head 65 is mounted. It is a carriage for moving the. The carriage 66 slidably engages with the guide shaft 67, and a part of the carriage 66 is connected (not shown) to a belt 69 driven by a motor 68. As a result, the carriage 66 can move along the guide shaft 67, and the recording head 65 can move the recording area and its adjacent area.

Reference numeral 51 is a paper feed section for inserting a recording medium, and 5
A paper feed roller 2 is driven by a motor (not shown). With these configurations, the recording medium is fed to the position facing the ejection port surface of the recording head, and as the recording progresses, the sheet discharge roller 53 is arranged and the sheet is discharged.

In the above structure, when the recording head 65 returns to the home position due to the end of recording or the like, the cap 62 of the head recovery section 64 is retracted from the movement path of the recording head 65, but the blade 61 projects into the movement path. There is. As a result, the ejection port surface of the recording head 65 is wiped. When the cap 62 comes into contact with the protruding surface of the recording head 65 to perform capping, the cap 62 moves so as to protrude into the moving path of the recording head.

When the recording head 65 moves from the home position to the recording start position, the cap 62 and the blade 61 are at the same position as the above-mentioned position at the time of wiping. As a result, the ejection opening surface of the recording head 65 is wiped even during this movement.

The above-mentioned movement of the recording head to the home position is performed not only at the end of recording or at the time of ejection recovery, but also at the home adjacent to the recording area at a predetermined interval while the recording head moves in the recording area for recording. The wiper is moved to the position, and the wiping is performed along with the move.

[0062]

The present invention will be described in more detail with reference to the following examples. In the text, “part” or “%” is based on weight unless otherwise specified.

Example 1 Cation-modified polyvinyl alcohol (trade name: CM-3
18. Manufacturer: Kuraray, saponification degree of about 89 mol%, polymerization degree of about 1700, cationization degree of about 2 mol%) using a wire bar, an aluminum vapor deposition film (thickness: 1
00 μm, trade name: Metalmy 100TS, manufactured by Toray) is applied to the side opposite to the aluminum vapor deposition surface so that the coating thickness after drying is 10 μm, and then dried at 120 ° C. for 3 minutes to obtain the recording medium of the present invention. Prepared.

On the recording medium, an ink having the following composition was used to form a color image with ink dots under the following conditions by an ink jet recording apparatus in which the ink was foamed by thermal energy to eject the ink.

Ink composition (black) C.I. I. Direct Black 19 3 parts Glycerin 6 parts Ethylene glycol 5 parts Urea 5 parts Isopropyl alcohol 3 parts Water 78 parts The surface tension of this ink was about 45 dyne / cm.

Ink composition (yellow, cyan, magenta) Dye 4 parts Glycerin 7 parts Thiodiglycol 7 parts Urea 7 parts Acetylene glycol 1.5 parts Water 73.5 parts The surface tension of this ink is about 35 dyne / cm. It was

Dye Y: C.I. I. Direct Yellow 86 M: C.I. I. Acid Red 23 C: C.I. I. Direct Blue 199 Recording conditions Ejection frequency: 4 KHz Ejection droplet volume: 45 pl Recording density: 360 DPI Maximum single color ink application amount: 8 nl / mm ²

Example 2 In Example 1, instead of the aluminum vapor-deposited film, a colorless transparent PET film having a thickness of 75 μm was thermocompression-bonded to the high gloss side of a commercial food-use aluminum foil having a thickness of 15 μm. A recording medium was prepared in exactly the same manner as in Example 1 except that the above-described ones were used, and a color image was formed by ink dots by an inkjet recording device in which the ink was foamed by thermal energy and the ink was ejected.

Example 3 In Example 1, instead of the aluminum vapor-deposited film, a commercially available food product aluminum foil having a thickness of 15 μm and a yellow PET film having a thickness of 75 μm thermocompression bonded to the high gloss side were used. A recording medium was prepared in exactly the same manner as in Example 1 except that it was used, and a color image was formed with ink dots by an inkjet recording device in which the ink was foamed by thermal energy and the ink was ejected.

Example 4 In Example 1, instead of the aluminum vapor-deposited film, an aluminum foil having a thickness of 15 μm for commercial food was thermocompression-bonded with a red-brown PET film having a thickness of 75 μm on the high gloss side. A recording medium was prepared in exactly the same manner as in Example 1 except that the above was used, and a color image was formed with ink dots by an inkjet recording device in which the ink was foamed by thermal energy and the ink was ejected.

Example 5 In Example 1, instead of the aluminum vapor-deposited film, a commercially available copper foil having a thickness of 30 μm has a thickness of 75 μm on the high gloss side.
A recording medium was prepared in exactly the same manner as in Example 1 except that a colorless and transparent PET film was heat-sealed, and ink dots were colored by an ink jet recording device in which the ink is foamed by thermal energy to eject the ink. An image was formed.

Example 6 In Example 1, instead of the aluminum vapor-deposited film, a commercially available food-use aluminum foil having a thickness of 15 μm was printed with a white floral pattern on the high-gloss side. A color image is formed by ink dots by an ink jet recording device in which a recording medium is prepared in exactly the same manner as in Example 1 except that a colorless and transparent PET film is used by thermocompression bonding, and the ink is foamed by thermal energy to eject the ink. Was formed.

Example 7 The ink receiving layer in Example 1 was prepared by using a cation-modified polyvinyl alcohol (trade name: CM-318, manufactured by Kuraray Co., Ltd., saponification degree: about 89 mol%, polymerization degree: about 1700, cationization degree: about 2 mol%). ) A composition comprising 100 parts and 20 parts of an acrylic acid ester-based copolymer aqueous emulsion (trade name; Movinyl 742N, Hoechst Synthetic, solid content 46%, MFT: 50 ° C) in terms of solid content in water as a medium. A recording medium was prepared in exactly the same manner as in Example 1 except that the ingredients were dissolved and mixed.
A color image was formed with ink dots by an ink jet recording apparatus that foams ink by heat energy and ejects the ink.

Example 8 Example 1 was repeated except that the ink receiving layer was polyvinyl acetal (trade name: KW-1, manufactured by Sekisui Chemical Co., Ltd.).
A recording medium was prepared in exactly the same manner as described above, and a color image was formed by ink dots by an inkjet recording device that foams the ink by heat energy and ejects the ink.

Example 9 Example 6 was repeated except that the ink receiving layer was changed to polyvinyl acetal (trade name: KW-1, manufactured by Sekisui Chemical Co., Ltd.).
A recording medium was prepared in exactly the same manner as described above, and a color image was formed by ink dots by an inkjet recording device that foams the ink by heat energy and ejects the ink.

Example 10 A recording medium was prepared in the same manner as in Example 1 except that polyvinyl alcohol (trade name: PVA217, manufactured by Kuraray) was used as the ink receiving layer in Example 1, and the ink was foamed by heat energy. A color image is formed with ink dots by an inkjet recording device that ejects ink by ink.

Example 11 A recording medium was prepared in the same manner as in Example 6 except that polyvinyl alcohol (trade name: PVA217, manufactured by Kuraray) was used as the ink receiving layer in Example 6, and the ink was foamed by heat energy. A color image is formed with ink dots by an inkjet recording device that ejects ink by ink.

Example 12 A recording medium was prepared in exactly the same manner as in Example 1 except that the ink receiving layer in Example 1 was hydroxyethyl cellulose (trade name: AL-15, manufactured by Fuji Chemical Co., Ltd.), and the ink was heated with heat energy. A color image was formed with ink dots by an inkjet recording device that foams and ejects ink.

Example 13 A recording medium was prepared in exactly the same manner as in Example 6 except that the ink receiving layer in Example 6 was hydroxyethyl cellulose (trade name: AL-15, manufactured by Fuji Chemical), and the ink was heated with heat energy. A color image was formed with ink dots by an inkjet recording device that foams and ejects ink.

Example 14 Inkjet recording in which a recording medium was prepared in the same manner as in Example 7 except that the surface was subjected to oxidation treatment after thermocompression bonding and the ink was foamed by thermal energy to eject the ink. The device formed a color image with ink dots.

Comparative Example 1 A recording medium was prepared in exactly the same manner as in Example 1 except that the base material of the ink receiving layer was white PET film (thickness 100 μm, trade name; white Lumirror, manufactured by Toray). Then, a color image was formed by an ink jet recording apparatus in which the ink was foamed by thermal energy and the ink was ejected.

Comparative Example 2 A recording medium was prepared in the same manner as in Example 1 except that the yellow PET film was used as the base material of the ink receiving layer in Example 1, and the ink was foamed by thermal energy to be ejected. A color image was formed by an inkjet recording device.

Comparative Example 3 A recording medium was prepared in exactly the same manner as in Example 1 except that the red PET film was used as the base material of the ink receiving layer in Example 1, and the ink was foamed by thermal energy and ejected. A color image was formed by an inkjet recording device.

Comparative Example 4 A recording medium was prepared in the same manner as in Example 1 except that the base material of the ink receiving layer was changed to 30 μm aluminum foil in Example 1, and the ink was foamed by heat energy to eject the ink. A color image was formed by the inkjet recording device.

Comparative Example 5 A recording medium was prepared in exactly the same manner as in Example 1 except that the base material of the ink receiving layer was changed to 30 μm copper foil in Example 1, and the ink was foamed by heat energy to eject the ink. A color image was formed by the inkjet recording device.

(Evaluation items) (1) Evaluation of metallic luster Those having metallic luster were marked with ◯, and those without metallic luster were marked with x. (2) Kind of metallic luster What kind of metallic luster was evaluated. (3) Preservation of metallic luster-1 Printed in an indoor environment and exposed to high temperature and high humidity of 45 ° C / 95%.
It was preserved for a week and the preservation of the metallic luster of the recorded matter was observed.

A sample having no change in metallic luster was evaluated as ◯, a sample having slightly deteriorated metallic luster was evaluated as Δ, and a sample having impaired metallic gloss and no gloss was evaluated as x. (4) Preservation of metallic luster-2 Printed in an indoor environment and exposed to high temperature and high humidity of 30 ° C / 80%.
It was preserved for a week and the preservation of the metallic luster of the recorded matter was observed.

A sample having no change in metallic luster was evaluated as ◯, a sample having slightly deteriorated metallic luster was evaluated as Δ, and a sample having impaired metallic luster and not having gloss was evaluated as x. (5) Ink fixing property In an environment of 25 ° C / 60%, after recording with full dots of two colors of black and yellow, cyan, and magenta, and leaving for 2 minutes, the black part and the color part, that is, yellow, Cyan and magenta two-color full dot areas were overlaid and rubbed from above with a pressure of 4 Kg / cm ² , and when the paper was peeled off, the ink was clearly transferred to the paper and the recording area The sample with obvious scratch was marked with x, some transfer was recognized, and the sample with small scratch was marked with Δ, and the sample with no transfer or scratch at all was marked with ◯.

The evaluation results are summarized in Table 1.

[0090]

[Table 1]

[0091]

As described above, according to the present invention, not only a recording medium having a metallic luster for ink jet recording can be obtained, but also the metallic luster is permanently impaired even under bad conditions of high temperature and high humidity environment. An excellent recording medium can be provided.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a head portion of an inkjet recording apparatus.

FIG. 2 is a cross-sectional view of a head portion of an inkjet recording device.

FIG. 3 is an external perspective view of a head in which the head shown in FIG. 1 is multi-headed.

FIG. 4 is a perspective view showing an example of an inkjet recording apparatus.

Claims (17)

[Claims] 1. A recording medium comprising an ink shielding layer on at least one surface of a metal foil, and an ink receiving layer provided on the ink shielding layer. 2. A recording medium comprising a film having an ink shielding effect, a metal being vapor-deposited on one surface and an ink receiving layer provided on the other surface. 3. The recording medium according to claim 1, wherein the ink shielding layer is a film of one kind or two or more kinds selected from polyolefin and polyester. 4. The recording medium according to claim 2, wherein the film having an ink shielding effect is one or more films selected from polyolefin and polyester. 5. The recording medium according to claim 1, wherein at least one of the metal foil, the ink shielding layer and the ink receiving layer is colored. 6. The film having an ink shielding effect and / or the ink receiving layer is colored.
The recording medium described in. 7. The recording medium according to claim 1, wherein the metal foil is one of a gold foil, a silver foil, a copper foil, and an aluminum foil. 8. The recording medium according to claim 2, wherein the vapor-deposited metal is any of gold, silver, copper, and aluminum. 9. The recording medium according to claim 1, wherein a metal corrosion prevention layer is provided on the back surface of the ink receiving layer opposite to the printing surface. 10. The recording medium according to claim 1, wherein the total thickness is 500 μm or less. 11. An image forming method, wherein an image is formed on the recording medium according to claim 1 by an inkjet method. 12. The image forming method according to claim 11, wherein the liquid medium component of the ink is composed mainly of water and a water-soluble organic solvent. 13. The image forming method according to claim 11, wherein the ink is cyan, magenta, yellow, or black ink. 14. The surface tension of black ink is cyan,
The image forming method according to claim 13, wherein the surface tension is higher than those of magenta and yellow inks. 15. The image forming method according to claim 11, wherein the ink jet system is a system in which thermal energy is applied to the ink to eject the ink. 16. A method for producing a recorded matter, which comprises forming an image on the recording medium according to claim 1 by an inkjet method to obtain a recorded matter having a metallic luster. 17. A recorded matter, wherein an image is formed by ink dots on the recording medium according to claim 1.