JP2003054114A - Ink jet recording matter, manufacturing method therefor, transfer sheet, ink jet recording equipment, and transfer equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording matter being excellent in the fastness of an image, hardly discoloring with time for a long period, being excellent in a feel of gloss, drape and texture, being uniform in the gloss and obtained by using pigment ink having a high printing density and a high quality, a manufacturing method of the matter, a transfer sheet used for the manufacturing method, ink jet recording equipment and transfer equipment. SOLUTION: The ink jet recording matter has an ink receiving layer containing porous inorganic particles on a base, and an image is formed of the pigment ink on the ink receiving layer. The transfer sheet is prepared by laminating a layer to be transferred and an adhesive layer sequentially on a substrate, and the layer to be transferred of this sheet is transferred onto the image of the recording matter by the medium of the adhesive layer. Thereby a protective layer covering the image is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recorded product having an image formed with a pigment ink on a so-called void type ink receiving layer, a method for producing the same, a transfer sheet used for the method, and an ink jet recording apparatus. And a transfer device.

[0002]

2. Description of the Related Art An ink jet recording method is a recording method in which ink droplets are ejected from minute nozzles in accordance with an image signal and adhered to a recording medium for printing. Since a large amount of ink is used to form a high-quality full-color image comparable to a silver salt photograph, a recording medium is required to have a high ink absorbing ability. In recent years, a plurality of dark and light inks having the same color tone but different colorant concentrations have been used in order to reduce the graininess of highlights and form higher quality images. The level of absorbency is increasing. Therefore, as a recording medium for ink jet recording having a high ink absorption capacity and capable of forming a high-quality full-color image comparable to a silver salt photograph, colloidal silica or vapor phase silica is formed on a substrate such as paper or film. A recording medium having a so-called void-type ink receiving layer, which contains an inorganic ultrafine particle pigment such as alumina hydrate or γ-type aluminum oxide as a main component, has been developed.

Further, as the ink used in the ink jet recording method, a colorant such as a dye or a pigment is generally dissolved or dispersed in an aqueous medium containing water, alcohol or the like, and the dye ink and the pigment ink. Is roughly divided into
Up to now, dye inks having advantages such as high color reproducibility and high solubility in water have been frequently used, but images formed on the void-type ink receiving layer by the dye ink are There is a problem that discoloration and fading over time easily occur due to the influence of ozone gas and the like, and the image fastness is poor. Image robustness is regarded as important with the recent expansion of inkjet recording technology to digital photo services and commercial printing applications, and its improvement is an important issue of inkjet recording technology. Therefore, pigment inks, which are more excellent in image fastness than dye inks, have been used for inkjet recording.

However, the image formed by the pigment ink has a problem that the pigment adheres to the outermost surface of the recording medium, so that the image is easily peeled off and the abrasion resistance is poor. In addition, on the surface on which an image is formed (recording surface), a difference in gloss occurs between a printed portion and a non-printed portion, or a phenomenon in which glossiness differs between portions having different amounts of adhered colorant, that is, so-called uneven gloss occurs. There was also a problem. Further, an image formed on a void-type ink receiving layer using a pigment ink has excellent image fastness as compared with an image formed on a void-type ink receiving layer using a dye ink, but ozone gas, heat, etc. Therefore, discoloration and fading with time tend to occur, and it is difficult to say that the image fastness is practically sufficient.

On the other hand, as a technique relating to a method for protecting an image formed mainly by dye ink, there is known a technique for forming a protective layer by laminating a transparent film or the like on a recording surface to improve water resistance and gloss. A cold laminating method using a film that adheres at room temperature, a hot (hot) laminating method of sticking a film while heating, and the like have been proposed. However, these laminating methods tend to cause wrinkles and bubbles in the film during lamination; since the smoothness of the protective layer is easily influenced by the smoothness of the recording surface, the void-type ink receiving layer formed with an image by pigment ink. On the other hand, it is impossible to form a protective layer having high smoothness; Further, the thickness of the protective layer is preferably as thin as possible from the viewpoint of good texture and texture, but these laminating methods have a limitation in thinning the protective layer.

As a kind of laminating method, a liquid laminating method is known in which a coating composition having a film-forming ability is applied to a recording surface and dried to form a film. However, when the liquid laminating method is applied to the void-type ink receiving layer, innumerable bubbles are generated from the void-type ink receiving layer during the film formation process, resulting in a protective layer full of bubbles. . Further, the liquid laminating method also has drawbacks such as high cost because it requires a drying step, control is difficult when the coating amount of the coating composition is small, and it is difficult to thin the protective layer. . In addition, as a coating agent that can be easily laminated, a spray-type coating agent prepared by dissolving a resin having a film forming ability in an oil-soluble organic solvent such as toluene or xylene together with an aerosolizing gas is commercially available. According to the formula, it is difficult to uniformly apply the coating agent to the recording surface, and it is impossible to form a clean and smooth thin protective layer.

As described above, although pigment inks, which are more excellent in image fastness than dye inks, are being used, problems specific to pigment inks such as abrasion resistance and uneven gloss are still solved. No inkjet recording material having high image quality and image fastness (long-term storability) comparable to silver halide photography has yet to be provided. In addition, various laminating methods have been proposed mainly for protecting images formed by dye ink, but laminating that can enhance gloss and image fastness without impairing the original texture and texture of recorded matter. The law has not yet been offered.

Therefore, an object of the present invention is an ink jet recorded material which makes use of the characteristics of a pigment excellent in image fastness (particularly light fastness and water fastness) and also has abrasion resistance, gas resistance and heat resistance. Excellent, does not easily discolor over time for a long time, has good gloss, texture, and texture, and has no uneven gloss.
An object of the present invention is to provide a high-quality inkjet recorded product having a high print density and a method for manufacturing the same. Another object of the present invention is to have a chemical / physical barrier property on the void-type ink receiving layer on which an image is formed by a pigment ink and to impair the original texture and texture of the inkjet recorded material. Another object of the present invention is to provide a transfer sheet and an inkjet recording device capable of forming a clean and highly smooth thin protective layer.

[0009]

Means for Solving the Problems As a result of various investigations, the present inventors have conducted various investigations in order to obtain an ink jet recorded material having high image quality and image fastness (long-term storage stability) comparable to those of silver salt photographs.
An ink jet recorded matter, in which an image is formed with a pigment ink on the void type ink receiving layer of a recording medium having a so-called void type ink receiving layer containing porous inorganic particles and a protective layer covering the image is desired, is desired. As a result of further examination, it was confirmed that the protective layer was the transfer layer and the adhesive layer of the transfer sheet in which the transfer layer and the adhesive layer were sequentially laminated on the support. It was found that the gloss feeling and the image fastness can be enhanced without deteriorating the original texture and texture of the ink jet recorded matter by transferring and forming the image on the image through the ink.

The present invention has been made based on the above findings, and an image is formed by a pigment ink on the ink receiving layer of a recording medium having an ink receiving layer containing porous inorganic particles on a substrate, An inkjet recorded matter having a protective layer for covering the image, wherein the protective layer comprises a transfer layer in which a transfer layer and an adhesive layer are sequentially laminated on a support via the adhesive layer. The above object is achieved by providing an inkjet recorded material formed by transferring the image onto the image and a method for producing the same.

Further, the present invention is a method for producing the above-mentioned ink jet recorded matter, wherein an ink jet layer with a pigment ink is formed on the ink receiving layer of a recording medium having an ink receiving layer containing porous inorganic particles on a substrate. A step of forming an image by a method and a step of transferring the transfer layer of the transfer sheet in which the transfer layer and the adhesive layer are sequentially laminated on a support on the image via the adhesive layer. The present invention provides a method for manufacturing an inkjet recorded matter, a transfer sheet, an inkjet recording device, and a transfer device used in the manufacturing method.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the ink jet recorded product of the present invention will be described below with reference to FIG. As shown in FIG. 1, the inkjet recording material 1 of the present embodiment has an image (not shown) formed by the pigment ink on the ink receiving layer 3 of the recording medium 4 having the ink receiving layer 3 on the substrate 2. It has a protective layer 6 which is formed and covers the image via an adhesive layer 5.

The base material 2 is not particularly limited, and includes high-quality paper, recycled paper, size-treated paper and the like; processed paper such as art paper, coated paper, cast-coated paper, resin-coated paper and resin-impregnated paper; polyethylene. , Polypropylene, polystyrene,
Films and sheet-like plastic substrates such as polyethylene terephthalate; non-woven fabrics, cloths, fabrics, metal films, metal plates; composite substrates obtained by laminating these, sheet-like products usually used as substrates in this type of coated paper Can be used. In particular, it is preferable to use paper or resin-coated paper (also referred to as resin-coated paper) in which at least one surface of the paper is coated with resin. The base material 2 is
High surface smoothness is preferable from the viewpoint of preventing bubbles from entering during transfer.

The ink receiving layer 3 is a so-called void type ink receiving layer containing porous inorganic particles and having innumerable fine voids on the surface or in the layer. Examples of the porous inorganic particles include silica-based pigments such as precipitation method, gel method and vapor phase method, smectite clay, calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, kaolin, clay, talc, magnesium silicate and silicic acid. Calcium, aluminum oxide, alumina, pseudo-boehmite, etc. are used. Inorganic ultrafine particle pigments such as colloidal silica, hydrated alumina and γ-type aluminum oxide are also preferably used. In addition, the surface properties of the ink receiving layer 3 (texture, texture)
Is not particularly limited, and can be appropriately adjusted to a matte type, a semi-gloss type, a gloss type, or the like.

For the ink receiving layer 3, an air knife coater or a roll coater is coated on the substrate 2 with a coating composition containing the porous inorganic particles and, if necessary, a binder resin such as polyvinyl alcohol and various additives. , A blade coater, a gate roll coater, a size press device, and the like, which are known in the art, and are applied and dried.

The ink receiving layer 3 may be any one as long as it contains porous inorganic particles, and a particularly preferable form is as follows. The content of the porous inorganic particles,
The content in the ink receiving layer 3 is preferably 30 to 90% by weight, more preferably 40 to 80% by weight. When the binder resin is used, its amount is preferably 5 to 60 parts by weight with respect to 100 parts by weight of the porous inorganic particles,
More preferably, it is 10 to 50% by weight. The thickness of the ink receiving layer 3 after drying is preferably 10 to 50 μm.
m, and more preferably 15 to 40 μm. The coating amount is preferably 10 to 50 g / m ² and more preferably 15 to 40 g / m ² as a dry weight. In addition, the ink receiving layer 3 is described in J. TAPPI No. The porosity measured according to 48-85 is preferably 20% or more.

The image (not shown) formed on the ink receiving layer 3 is formed by an ink jet method using pigment ink. The pigment ink may be one that is usually used in ink jet recording. Pigment ink is generally an aqueous liquid containing a pigment, which is a colorant, in water, and usually, for permeation adjustment, moisture retention, viscosity adjustment, etc.,
It also contains various solvent components and surfactants. When performing color recording, as the pigment ink, in addition to the three subtractive primary colors of yellow, magenta, and cyan, each color ink such as black, orange, and green; if necessary, so-called light ink such as light cyan and light magenta is used. You can also Further, the inkjet method includes a method using a piezoelectric element and a method using a heating element, but is not particularly limited.

Adhesive layer 5 covering the image (not shown)
The protective layer 6 is formed by transferring the transfer layer of the transfer sheet in which the transfer layer and the adhesive layer 5 are sequentially laminated on the support, onto the image via the adhesive layer 5. . Hereinafter, the adhesive layer 5 and the protective layer 6 will be described together with preferred embodiments of the transfer sheet of the present invention used for forming them.

As shown in FIG. 2, the transfer sheet 10 of the present embodiment is formed by sequentially laminating a layer to be transferred 12, an adhesive layer 5 and a release sheet 13 on one surface of a support 11.

The support 11 is not particularly limited, and those normally used as a support (base material) in this type of transfer sheet can be used, for example, polyethylene terephthalate (PET), 1,4. -Polycyclohexylene dimethylene terephthalate, polyethylene naphthalate (PEN), polyphenylene sulfide (P
PS), polyether sulfone (PES), polystyrene, polypropylene, aramid, polycarbonate,
Polyvinyl alcohol, cellophane, cellulose derivatives such as cellulose acetate, polyethylene, polyvinyl chloride,
Resin films such as nylon, polyimide and ionomer; papers such as condenser paper and paraffin paper; non-woven fabrics; or papers or composite films of non-woven fabrics and resin films can be used. Among these, it is particularly preferable to use PET in terms of cost and peelability. Further, in order to control the adhesiveness with the transferred layer 12, corona discharge treatment, antistatic treatment,
It is also possible to use a product that has been subjected to a release treatment or the like. Also,
In order to control the surface properties of the transferred layer 12 (matte, glossy, semi-glossy, embossed, etc.), it is also possible to use a mold having the adhesive surface side with the transferred layer 12 patterned. The thickness of the support 11 is not particularly limited, but from the viewpoint of cost and releasability, it is preferably 10 to 200 μm, more preferably 15 to 80 μm.

The transferred layer 12 is a layer which is transferred onto the ink receiving layer 3 having the image formed thereon via the adhesive layer 5 to form the protective layer 6, and is made of a resin. As the resin, it is preferable to select a resin that is resistant to discoloration by heat or light, can form a coating film having excellent chemical / physical barrier properties, and has high transparency. That is, it is preferable to select the resin so that the light transmittance of the layer composed of the protective layer 6 and the adhesive layer 5 is preferably 80% or more, more preferably 90% or more. The light transmittance is JIS K6714,
It can be measured according to JIS K7105 and ASTM D1003.

As the resin that can be preferably used, acrylic resin, polyethylene resin, polycarbonate, urethane resin, cellulose resin, polypropylene, acetal resin, acrylonitrile-butadiene-
Styrene (ABS) resin, polyester resin, etc. are mentioned, and these 1 type (s) or 2 or more types can be used.

In addition to the above-mentioned resins, the transfer layer 12 contains, if necessary, an ultraviolet absorber, a light stabilizer, a quencher, an antioxidant, a water-proofing agent, a mildew-proofing agent, an antiseptic, a surfactant, and a surfactant. One kind or two or more kinds of various additives such as a sticky agent can be contained.

The thickness of the transferred layer 12 is preferably 2 to 20 μm, more preferably 2 after the transfer layer 12 is finally transferred onto the ink receiving layer 3 via the adhesive layer 5 to form the protective layer 6. It is preferable to set it to be 10 μm.
If the thickness of the protective layer 6 is less than 2 μm, it is not meaningful to provide the protective layer, and if it exceeds 20 μm, the coating film is too thick, and the original texture and texture of the inkjet recorded matter may be impaired. Since the thickness of the transferred layer 12 hardly changes before and after the transfer, in practice, the thickness of the transferred layer 12 itself may be set within the above range.

The transferred layer 12 may have a single-layer structure composed of only one coating composition, or a multi-layer structure formed by applying a plurality of coating compositions having different compositions one on top of another and then drying. Good. In the case of a multi-layer structure, the thickness of the transferred layer 12 having the multi-layer structure as a whole is preferably set within the above range.

The adhesive layer 5 is a layer for fixing the transferred layer 12 on the ink receiving layer 3, is formed over the entire surface of the transferred layer 12, and is made of a pressure sensitive adhesive. The adhesive layer 5 can be adhered to the surface of the ink receiving layer 3 with a weak pressure such as a light pressure, without the need to activate water, a solvent, heat or the like. The adhesive force of the adhesive layer 5 to the surface of the ink receiving layer 3 can be appropriately adjusted by appropriately selecting the pressure-sensitive adhesive. It is also possible to make it possible to adhere to the surface of the ink receiving layer 3 so as to be able to come into contact with and separate from the surface without breaking the formed image.

As the pressure-sensitive adhesive, it is preferable to use an acrylic cross-linking adhesive. As the acrylic cross-linking adhesive, (1) a main monomer component having a low glass transition temperature (Tg) that imparts adhesiveness, (2) a comonomer component having a high Tg that imparts adhesiveness and cohesive force, (3) A polymer or copolymer mainly composed of a functional group-containing monomer component for crosslinking or improving adhesiveness can be used.

Examples of the main monomer component include ethyl acrylate, butyl acrylate, amyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, cyclohexyl acrylate, benzyl acrylate, and other alkyl acrylates; butyl methacrylate. 2-ethylhexyl methacrylate, cyclohexyl methacrylate,
Examples thereof include methacrylic acid alkyl esters such as benzyl methacrylate, and one or more of these can be used.

Examples of the comonomer component include methyl acrylate, methyl methacrylate, ethyl methacrylate, vinyl acetate, styrene and acrylonitrile.
These 1 type (s) or 2 or more types can be used.

As the functional group-containing monomer component, a carboxy-containing monomer such as acrylic acid, methacrylic acid, maleic acid, itaconic acid, crotonic acid; 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, Hydroxyl group-containing monomers such as N-methylol acrylamide; acrylamide, methacrylamide, glycidyl methacrylate and the like, and one or more of these can be used.

The acrylic crosslinkable adhesive (pressure-sensitive adhesive) is produced by adding an appropriate amount of a crosslinking agent to a solution containing the polymer or the copolymer. As the crosslinking agent, an isocyanate type, an epoxy type, an ethyleneimine type, an alkylate type or the like can be used.

The thickness of the adhesive layer 5 is preferably 3 to 20 μm after it is finally transferred onto the ink receiving layer 3.
m, and more preferably 5 to 15 μm. If the thickness of the adhesive layer 5 is less than 3 μm, the adhesive strength is poor and the protective layer 6 may peel off.
If it exceeds m, the coating film is too thick, and the original texture and texture of the inkjet recorded product may be impaired. Since the thickness of the adhesive layer 5 hardly changes before and after the transfer, in practice, the thickness of the adhesive layer 5 before the transfer may be set within the above range.

The release sheet 13 may be any as long as it can be releasably adhered to the adhesive layer 5 and can physically protect the adhesive layer 5. For example, high quality paper, glassine paper, or the like, A film such as a polyester film or a polypropylene film coated with a release agent such as silicone is preferably used. The amount of the release agent applied may be appropriately selected. Further, from the viewpoint of facilitating the peeling from the adhesive layer 5, a slit may be provided on the adhesive surface of the release sheet 13 with the adhesive layer 5.

The transfer sheet 10 can be manufactured as follows. First, a coating composition prepared by dissolving or dispersing the resin in an appropriate solvent such as an aqueous system or an organic solvent system and containing various additives as necessary is formed on the support 11 by an extrusion laminator. The layer to be transferred 12 is provided by extrusion lamination using a conventional method. Then, the pressure-sensitive adhesive is applied onto the transferred layer 12 by a conventional method using a known coating device and dried to form the adhesive layer 5. Then, the surface of the adhesive layer 5 and the surface of the release sheet 13 on which the release agent is applied are overlapped and pressed to stick the release sheet 13. The transferred layer 12 can also be provided by a dry lamination method.

Then, the protective layer 6 is formed by using the transfer sheet 10 having such a structure, and transferring the image on the ink receiving layer 3 on which the image has been formed in a usual manner. That is, the peeling sheet 13 of the transfer sheet 10 is peeled off to expose the adhesive layer 5, the adhesive layer 5 and the ink receiving layer 3 are superposed, and a pressure is applied by passing them between a pair of rolls and the like, and the transferred layer 12 is transferred. Through the adhesive layer 5 to the ink receiving layer 3
After sticking on top, only the support 11 is peeled off to form the protective layer 6. The transfer sheet 10 is transferred when the peeling sheet 13 is peeled off to expose the adhesive layer 5 and then the adhesive layer 5 is pressure-bonded onto the image of the recording medium 4 on which the image is formed by the pigment ink. Support 11 for layer 12
The adhesive force to the transfer layer 1 of the adhesive layer 5 is A1.
2 is A2, the adhesive force of the adhesive layer 5 to the release sheet 13 is A3, and the adhesive force of the adhesive layer 5 to the surface of the recording medium 4 or the image is A4,
Since A2, A4>A1> A3 are established by a method such as appropriately selecting the resin or the pressure-sensitive adhesive, the above-mentioned transfer operation can be performed smoothly.

As in this embodiment, the protective layer 6 is preferably formed so as to cover the entire surface of the ink receiving layer 3 on which the image is formed, but the image forming portion (the ink receiving portion of the image and the vicinity thereof is received). It may be formed so as to selectively cover only the surface portion of the layer 3).

The pressure condition at the time of transfer may be appropriately adjusted in consideration of the thickness of the protective layer 6, etc., but is preferably 0.1 to 10 kg / cm, more preferably 0.2 to 5 k in linear pressure.
It is g / cm. You may heat as needed.

Next, the method for producing the ink jet recorded article of the present invention will be described by taking the method for producing the ink jet recorded article 1 shown in FIG. 1 as an example, together with a preferred embodiment of the ink jet recording apparatus of the present invention used in the production method. This will be described with reference to FIG.

FIG. 3 is a diagram schematically showing a main part of the ink jet recording apparatus of this embodiment. The inkjet recording device 20 of FIG. 3 includes an inkjet recording means 21 for forming an image on the recording medium 4 with ink, and a transfer device. Except that the transfer device is provided, this type of inkjet recording device 20. It is configured similarly to the recording device. The transfer device includes a transfer target layer 12, a transfer target layer 12, and
The transfer sheet 10 in which the adhesive layer 5 and the release sheet 13 are sequentially stacked is supplied while supplying the transfer sheet 10 while releasing the release sheet 13, and the transfer target layer 12 of the transfer sheet 10 via the adhesive layer 5. And pressing means 23 for sticking it on the image, and the support 11 for the transfer sheet 10 after pressing.
And a peeling means 24 for peeling.

The ink jet recording means 21 is constructed in the same manner as in this kind of ink jet recording apparatus, and supplies a carriage movable in the main scanning direction, a recording head mounted on the carriage, and ink to the recording head. Ink cartridges and the like (not shown) are provided. The inkjet method includes a method of ejecting ink by using an electromechanical transducer such as a piezo element, a method of heating and ejecting ink by an electrothermal transducer such as a heating element having a heating resistor, and the like. Not done.

The transfer sheet supply means 22 includes a supply roller 22a capable of supplying the transfer sheet 10 wound in a roll shape along the conveyance direction of the recording medium 4, and a release sheet 13 from the transfer roll 10. It is provided with a collecting roller 22b that can be separated and collected. The pressurizing means 23,
It is equipped with a pair of rolls, and a pressure treatment can be performed on the sheet-like material passing between the rolls. Peeling means 2
4 is equipped with a take-up roll, and the support 11 adhered onto the ink receiving layer 3 via the adhesive layer 5 and the transfer layer 12 can be peeled off and taken up.

In the ink jet recording apparatus 20 having such a structure, the recording medium 4 (recording medium having the ink receiving layer 3 on the substrate 2) wound in a roll is
The paper is fed to the inkjet recording means 21 by the paper feed roller, and droplets of each color pigment ink are ejected onto the ink receiving layer 3 based on the input image information, and an image is formed by the inkjet method. Next, the transfer sheet supply means 22 supplies the transfer sheet 10 in a state where the release sheet 13 is released and the adhesive layer 5 is exposed onto the ink receiving layer 3 with the adhesive layer 5 facing downward. Then, the layer to be transferred 12 is conveyed to the pressure unit 23 while being kept in the laminated state and is pressurized, whereby the transfer target layer 12 is transferred to the protective layer 6 via the adhesive layer 5.
Is fixed on the ink receiving layer 3. At this stage, the support 11 is peeled off by the peeling means 24 and wound up and collected. Then, the inkjet recording material 1 is obtained by cutting into a desired length with the cutter 25.

The thus-obtained ink-jet recorded product of the present invention has a clean and highly smooth thin film protective layer, and therefore has no uneven gloss and is excellent in gloss feeling, texture, and texture. The surface properties such as glossiness, texture, and texture can be adjusted by appropriately selecting the type and thickness of the base material, the thickness of the protective layer, the type of resin, and the like. Matte, semi-glossy, glossy Etc. as desired. Also,
The ink jet recorded product of the present invention has an image formed with a pigment having excellent light resistance and water resistance, and further, since it has a protective layer having excellent chemical and physical barrier properties,
The image fastness is high, the discoloration and fading over time does not easily occur, and it can be stored for a long time. Further, the protective layer according to the present invention can be made thin, and there is no fear of impairing the original texture and texture of the inkjet recorded material. It was difficult to form a thin and highly smooth protective layer on the surface of the void-type ink receiving layer on which an image was formed with a pigment ink, without generating bubbles, by the conventional laminating method of this type. However, according to the above-described manufacturing method of the present invention, it can be realized by simple steps. Further, the transfer sheet and the inkjet recording device (transfer device) of the present invention used in the manufacturing method,
None of them have a special structure and are easy to manufacture and handle.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.
For example, in FIG. 1, the ink receiving layer 3 may be provided not only on one side of the substrate 2 but also on both sides. When the ink receiving layer 3 is provided on both sides, the adhesive layer 5 and the protective layer 6 may be provided on both ink receiving layers 3, respectively, and the adhesive layer 5 and the protective layer 6 are provided only on one ink receiving layer 3. May be. Further, the transfer sheet of the present invention may have a layer to be transferred, an adhesive layer and a release sheet sequentially laminated on a support, and for example, in FIG. A back coat layer may be provided on the opposite surface. The back coat layer may have a function of preventing blocking between transfer sheets and the like.

Further, the ink jet recording apparatus of the present invention comprises an ink jet recording means for forming an image on a recording medium with ink, and a transfer sheet in which a transferred layer, an adhesive layer and a release sheet are sequentially laminated on a support. A transfer sheet supply means for supplying the release sheet while peeling it, a pressure means for attaching the transfer layer of the transfer sheet onto the image through the adhesive layer, and a pressure. It suffices to include a peeling unit that peels the support of the transfer sheet later, and the specific configuration of each of these units and other mechanisms are not limited to the above-described embodiment, and can be appropriately changed. For example,
In the above-described embodiment, the roll-shaped recording medium is used, but a cut sheet of a predetermined size such as A4 may be used.

[0046]

EXAMPLES The present invention will be described more specifically with reference to Examples of the present invention and Test Examples showing the effects of the present invention.
The present invention is not limited to such embodiments.

[Example 1] For the ink receiving layer of the substrate (trade name "PM Photo Paper", Seiko Epson KA420PSK, porosity about 70%), the ink jet printer (trade name " MC200
0 ", manufactured by Seiko Epson) and used with yellow (Y), magenta (M), cyan (C), red (R), green (G), blue (B) and black (Bk) pigment inks. , OD (Optical Dens
and a maximum density of color patch were printed to obtain an ink jet recorded matter.

On the other hand, on one surface of a PET film (thickness: about 38 μm) as a support, an acrylic resin was extrusion laminated so that the thickness after drying was 10 μm to form a transferred layer, and then the transferred layer was formed. Acrylic pressure-sensitive adhesive is applied on top of it so that the thickness after drying is 5 μm,
An adhesive layer was formed. Then, a silicone release-treated PET film (thickness of about 50 μm) as a release sheet was attached to the entire surface of the adhesive layer to obtain a transfer sheet.

Using the transfer sheet thus obtained, the transfer layer was transferred to the ink jet recorded matter. That is, they are superposed so that the ink receiving layer of the ink jet recorded product and the adhesive layer of the transfer sheet are in contact with each other, passed through a pair of rolls, and pressed at a linear pressure of 0.5 kg / cm. Treatment is carried out, the transfer layer is adhered to the entire surface of the ink receiving layer via the adhesive layer to form a protective layer, and the support is peeled off.
An intended inkjet recording material with a protective layer was produced. In the inkjet recorded product with the protective layer, the thickness of the protective layer was about 10 μm, and the thickness of the adhesive layer was about 5 μm.

Comparative Example 1 An ink jet recorded matter having the same structure as the ink jet recorded matter with the protective layer of Example 1 except that the protective layer and the adhesive layer were not provided was used as a sample of Comparative Example 1 as it was.

[Test Example] With respect to each of the ink-jet recorded matter with the protective layer of Example 1 and the ink-jet recorded matter of Comparative Example 1, glossiness, gloss uniformity, abrasion resistance, gas resistance and heat resistance are respectively as follows. It was evaluated by the method. The results are shown in Table 1 below.

(Evaluation of Glossiness) The 60-degree specular glossiness of each non-printed portion of each ink jet recorded product was measured using a gloss meter "PG-1" (manufactured by Nippon Denshoku Co., Ltd.). The larger this value is, the better the gloss is.

(Evaluation of Gloss Uniformity) OD of Y, M, C, R, G, B and Bk for each ink jet recorded matter
The color difference between the value of 1.0 and the maximum density color was obtained and evaluated according to the following evaluation criteria. <Evaluation Criteria> A: Color difference is less than 5. Good gloss uniformity. B: Color difference is 5 or more and less than 15. No gloss uniformity problem. C: Color difference is 15 or more and less than 20. Practical limit. D: Color difference is 20 or more. Not practical.

(Evaluation of abrasion resistance) An eraser (width 20 mm) was formed on the protective layer (Example) or ink receiving layer (Comparative Example 1) of each ink jet recorded article with a gradient of 60 ^. Place at
The surface state of the protective layer or the ink receiving layer after rubbing the protective layer or the ink receiving layer 10 times with the eraser was visually observed with a load of 1 kg applied from the top of the eraser. evaluated. <Evaluation Criteria> A: No scratches or peeling on the surface. Good abrasion resistance. B: The surface has scratches. There is no problem in practical use. C: The surface layer is peeled off. Not practical.

(Evaluation of Gas Resistance) Each ink jet recorded product was placed in a glass container having a gas inlet and a gas outlet, and ozone gas generated by a gas generator was continuously supplied at 1 ppm for 100 hours. And gas treatment was performed. Then, using a color difference meter, the color difference of the black-printed portion of each inkjet recording before and after the gas treatment was determined, and evaluated according to the following evaluation criteria. <Evaluation Criteria> A: Color difference is less than 5. Good gas resistance. B: Color difference is 5 or more and less than 15. No gas resistance problem. C: Color difference is 15 or more and less than 20. Practical limit. D: Color difference is 20 or more. Not practical.

(Evaluation of Heat Resistance) Each ink jet recorded product was placed in a thermo-hygrostat (model PR-3KT, manufactured by Tabai Espec) and left at 70 ° C. and 60% RH for 1 month. Then, using a color difference meter, the color difference (average value) before and after being put into the constant temperature and humidity tank for the white paper portion of each ink jet recorded product was obtained, and evaluated according to the following evaluation criteria. <Evaluation Criteria> A: Color difference is less than 5. Good heat resistance. B: Color difference is 5 or more and less than 15. Practical limit. C: Color difference is 15 or more. Not practical.

[0057]

[Table 1]

[0058]

EFFECTS OF THE INVENTION According to the present invention, the image fastness is excellent, the discoloration and fading with time is not likely to occur over a long period of time, the gloss feeling, the texture and the texture are good, there is no uneven gloss, and the printing density is high. It is possible to provide an ink jet recorded matter using a high quality pigment ink.

[Brief description of drawings]

FIG. 1 is a diagram schematically illustrating a cross section of an inkjet recording material of the present embodiment.

FIG. 2 is a diagram schematically illustrating a cross section of a transfer sheet according to the present embodiment.

FIG. 3 is a diagram schematically showing a main part of the inkjet recording apparatus of the present embodiment.

[Explanation of symbols]

1 inkjet recording 2 base materials 3 Ink receiving layer 4 recording media 5 Adhesive layer 6 protective layer 10 Transfer sheet 11 Support 12 Transferred layer 13 Release sheet 20 Inkjet recording device 21 inkjet recording means 22 Transfer sheet feeding means 22a Supply roller 22b Collection roller 23 Pressurizing means 24 Peeling means 25 cutter

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Claims (13)

[Claims] 1. An ink jet recording comprising a recording medium having an ink receiving layer containing porous inorganic particles on a substrate, an image formed by a pigment ink on the ink receiving layer, and a protective layer covering the image. The protective layer is formed by transferring the transferred layer of a transfer sheet in which a transferred layer and an adhesive layer are sequentially laminated on a support, onto the image via the adhesive layer. Inkjet recordings. 2. The ink jet recorded matter according to claim 1, wherein the protective layer has a thickness of 2 to 20 μm. 3. The ink jet recorded matter according to claim 1, wherein the layer formed of the protective layer and the adhesive layer has a light transmittance of 80% or more. 4. The ink jet recorded matter according to claim 1, wherein the adhesive layer comprises a pressure sensitive adhesive. 5. The ink jet recorded matter according to claim 1, wherein the adhesive layer has a thickness of 3 to 20 μm. 6. The ink jet recorded matter according to claim 1, wherein the protective layer is formed so as to cover the entire surface of the ink receiving layer on which the image is formed. 7. The method for producing an inkjet recorded article according to claim 1, wherein the recording medium has an ink receiving layer containing porous inorganic particles on a substrate. And a step of forming an image by an inkjet method using a pigment ink, and the transfer layer of a transfer sheet in which a transfer layer and an adhesive layer are sequentially laminated on a support on the image via the adhesive layer. And a transfer step. 8. A transfer sheet used in the method for producing an inkjet recorded article according to claim 7, wherein a transfer layer, an adhesive layer and a release sheet are sequentially laminated on a support. 9. The peeling sheet of the transfer sheet is peeled off to expose the adhesive layer, and then the adhesive layer is pressure-bonded onto the image of a recording medium on which an image is formed by a pigment ink. The adhesive force of the transferred layer to the support is A
1, the adhesive force of the adhesive layer to the transferred layer was A2, the adhesive force of the adhesive layer to the release sheet was A3, and the adhesive force of the adhesive layer to the recording medium surface or the image was A4. In this case, the transfer sheet according to claim 8, wherein A2, A4>A1> A3. 10. The support has a thickness of 10 to 200 μm.
10. The transfer sheet according to claim 8, wherein the transferred layer has a thickness of 2 to 20 μm, and the adhesive layer has a thickness of 5 to 20 μm. 11. The transfer sheet according to claim 8, wherein a slit is provided on an adhesive surface of the release sheet with the adhesive layer. 12. An ink jet recording apparatus used in the method for producing an ink jet recorded matter according to claim 7, wherein the ink jet recording means forms an image on a recording medium with ink, and a transfer layer is formed on a support. A transfer sheet in which an adhesive layer and a release sheet are sequentially laminated, and a transfer sheet supply means for supplying the release sheet while separating the release sheet,
Inkjet recording provided with a pressing means for sticking the transferred layer of the transfer sheet onto the image through the adhesive layer, and a peeling means for peeling the support of the transfer sheet after the pressure is applied. apparatus. 13. A transfer device for use in the method for producing an inkjet recorded matter according to claim 7, wherein the transfer sheet has a transfer layer, an adhesive layer and a release sheet sequentially laminated on a support. For supplying while peeling off the sheet, a pressure means for sticking the layer to be transferred of the transfer sheet onto the image via the adhesive layer, and a means for applying the transfer sheet after the pressure is applied. A transfer device comprising: a peeling unit that peels off the support.