JPH10244748A - Recording medium having glossy layer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of making a film reutilizable by a so-called film cast process; to be concrete, by a method wherein an ink receiving layer is formed on a base material, a glossy layer precursor coating liquid is applied on the ink receiving layer on the base material to form a coating liquid layer, a film whose surface is smooth and which is water repellent-treated is superposed on this coating liquid layer to be brought into close contact with it, the coating liquid layer is dried to form a glossy layer, and then the film is separated from the glossy layer. SOLUTION: A film having at least 90 degrees at a static contact angle made by its surface and a glossy precursor coating liquid is used. To be more concrete, a substance of imparting water repellency to the surface of the film e.g. a substance carried with a fluorine compound or a silicone compound is utilized. Such a film can be separated from a glossy layer without leaving any part of a component of the glossy layer on the surface of the film, and can be reutilized for the manufacture of a recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a recording medium having a glossy layer on its surface, which is called a film casting method.

2. Description of the Related Art In a recording medium on which recording is performed by using an ink composition, a glossy layer for smoothing the surface is provided in order to give the recorded image a luxurious or photo-like quality. ing. Further, with the spread of ink jet printers, especially color ink jet printers, high-resolution images can be easily obtained. Therefore, a recording medium having a gloss layer which is preferably used in an ink jet recording method is required.

As a method for producing a recording medium having such a glossy layer, a method called a film casting method is known (for example, JP-A-63-151476).
According to this method, a recording medium having a good gloss layer can be easily manufactured. In this method, a coating liquid as a glossy layer precursor is applied on a recording medium base material or on an ink receiving layer provided on the recording medium base material, and then on the coating liquid layer. A film having a smooth surface is overlapped and adhered. In this state, the coating liquid layer is dried, and then the film is peeled to obtain a recording medium provided with a gloss layer. As far as the present inventors know, this film is considered to be basically not reusable because it is peeled off with a slight but glossy layer component attached to its surface.

[0004]

SUMMARY OF THE INVENTION In the film casting method as described above, the present inventors have utilized a film having high water repellency as a film to be superposed and adhered on a coating liquid layer, so that the film can be reused. We found that it is possible. Furthermore, it has been found that the use of such a film further improves the glossiness of the surface of the obtained recording medium. The present invention is based on this finding.

Accordingly, the present invention is a so-called film casting method, and an object of the present invention is to provide a method for manufacturing a recording medium which enables the film to be reused.

Another object of the present invention is to provide a method for producing a recording medium having a good gloss layer, which is a so-called film casting method.

[0007] A method for manufacturing a recording medium according to the present invention is a method for manufacturing a recording medium having at least an ink receiving layer and a gloss layer on a substrate in this order. Forming a receiving layer, on the ink receiving layer of the substrate, to form a coating liquid layer by applying a gloss layer precursor coating liquid,
On the coating liquid layer, a film having a smooth surface and having a static contact angle of 90 ° or more between the surface and the gloss layer precursor coating liquid is overlapped and brought into close contact with each other. Drying the liquid layer to a glossy layer, and peeling off the film from the glossy layer.

[0008]

DETAILED DESCRIPTION OF THE INVENTION Water-repellent treatment of a film In the present invention, the details of which will be described later, in the production method according to the present invention, the surface and the details thereof will be described later as a film which is overlaid and adhered onto a coating liquid layer. The one having a static contact angle of 90 ° or more with the gloss layer precursor coating liquid is used. By using such a film having high water repellency, after the film is peeled from the gloss layer, it can be reused in the method for producing a recording medium according to the present invention. Conventionally, a phenomenon was observed in which the glossy layer component adhered to the surface, albeit slightly, and was peeled off. However, in the present invention, such an adhered component can be almost ignored and reuse becomes possible. As a result, it is possible to reduce the manufacturing cost as compared with the case where the conventional film is disposable. If both surfaces are used, the manufacturing cost can be further reduced. Furthermore, since the film can be peeled off without attaching the gloss layer component, the glossiness of the surface of the obtained recording medium is extremely good. More specifically, the glossiness is about 35 or more in the 60-degree specular glossiness according to the measurement method defined in JIS Z8741, and in a more preferable embodiment, about 45 can be realized.

According to a preferred embodiment of the present invention, such high water repellency may be achieved by selecting the material of the film. Further, according to another aspect of the present invention, it may be realized by performing a water-repellent treatment on a surface of a film as a base material.

In the latter case, the substrate film is not particularly limited as long as its surface is smooth, but is preferably made of a resin film such as polyester, polypropylene, polyethylene and polyimide. The degree of surface smoothness is preferably, for example, a Beck smoothness of 1000 seconds or more, and more preferably 5000 seconds or more.
The thickness of the film is not particularly limited, but is preferably about 100 μm or less, and more preferably about 75 μm or less.

The water repellent treatment can be preferably carried out by supporting a substance imparting water repellency on the film surface. According to a preferred embodiment of the present invention, specific examples of the substance imparting water repellency include a fluorine-based compound and a silicone-based compound.

A specific example of the fluorine compound is a water-soluble random block or graft copolymer of a fluoroalkylpolysiloxane and a higher alcohol. The water-soluble fluorine compound may be in the form of a fluororesin emulsion, such as an emulsion in which fluorosilicone oil is stably dispersed in water. As the fluorine-based compound, a fluorine-based surfactant such as a fluorine-substituted alkyl ester or a perfluoroalkylcarboxylate used as a release agent can be used. Industrial Co., Ltd.), Lumiflon, Fluon, Aflon, Asahigard (from Asahi Glass Co., Ltd.), Sumiflunone (Sumitomo Chemical Co., Ltd.), Erasguard (Daiichi Kogyo Seiyaku) and the like. Furthermore, a fluorine-based surfactant can also be used as the fluorine-based compound. Futhergent (manufactured by Neos), Rodine (manufactured by Ciba-Geigy), Zonir (manufactured by Dupont), Montfloor (manufactured by ICI), Surflon (manufactured by Asahi Glass),
Unidyne (manufactured by Daikin Industries, Ltd.), Megafac (manufactured by Dainippon Ink and Chemicals), Florard (manufactured by 3M) and the like.

Specific examples of the silicone compound include polyalkyl or polyallylsiloxane (eg, dimethylsiloxane, phenylsiloxane, etc.) and high alcohol (eg, ethylene glycol, trimethylolpropane, pentaerythritol, sorbitol, etc.). Examples include random, block, or graft copolymers that are water-soluble. Further, a water-soluble copolymer of a siloxane compound and hydroxymethacrylic acid is also a preferred example. This silicone compound
It may be in the form of a silicone emulsion, specifically, a silicone oil (siloxane skeleton (Si-OS)
An emulsion obtained by stably dispersing the polydimethylsiloxane (i)) in water or an emulsion obtained by emulsion polymerization of a dimethylsiloxane monomer. Some of the methyl groups in these molecules may be substituted with epoxy groups, amino groups, reactive hydrogen, and the like. As these silicone compounds, those commercially available as release agents can also be used. Examples thereof include solvent-type SD7223, SD7226, and SD72.
29, emulsion type BY22-826, SH49
0, SM8701, SM8706, SH7028A, S
H7036, SM7060 (Toray Dow Corning Silicone Co., Ltd.), Emulsion KM Series, Solvent KS774, KS3703 (Shinetsu Silicone Co., Ltd.), TSW Series, TSM Series, YMR Series (Toshiba Silicone Co., Ltd.) ). It is also possible to use a silicone-based surfactant, for example, a polymethylsiloxane-type surfactant.

The water-repellent treatment is preferably carried out by applying a water-repellent substance such as a fluorine-based compound or a silicone-based compound on a film together with a binder, followed by drying. Specific examples of the binder include PVA, oxidized starch, etherified starch, other starch derivatives,
Examples include gelatin, casein, carboxymethylcellulose, hydroxyethylcellulose, other cellulose derivatives, polyvinylpyrrolidone, and the like.

In the method according to the present invention, a substrate is prepared and an ink receiving layer is first formed thereon.

The substrate to which the method according to the present invention can be applied is not particularly limited as long as it can support a gloss layer or an ink receiving layer described later and has a strength as a recording medium. May be. Examples of the opaque substrate include cloth, wood, metal plate, paper, and the like. Further, a opaque substrate obtained by subjecting a later-described transparent substrate to opacity treatment can also be used.

In the present invention, paper is preferably used as the base material. The paper is preferably made of pulp raw material mainly composed of natural cellulose fibers, and its composition and production method may be appropriately determined. For example, paper produced by a wet papermaking method is preferably used. Specifically, coniferous wood as a pulp material, wood pulp such as kraft pulp prepared solely or appropriately by blending hardwood, sulfite pulp, semi-chemical pulp, and bleached pulp are preferable to obtain clear printing . It is also possible to use non-wood pulp such as waste paper pulp, pagasu, kenaf, cotton, hemp, esparto, bamboo and straw.

In papermaking, a sizing agent, a wet paper strength agent, a filler, and a surface paper strength enhancer may be appropriately blended as internal additives. In addition, starch, modified starch, carboxymethylcellulose, as additive chemicals for internal addition to pulp raw materials,
Internal paper strength agents such as polyacrylamide and styrene resin,
Coloring agents, fixing agents such as sulfuric acid bands and polyacrylamide,
Furthermore, in addition to the surface paper strength enhancer described later as a coating chemical, a water-resistant agent such as dialdehyde starch, melamine resin, polyamide resin, an antistatic agent, a water repellent, a friction agent, a surface sizing agent, a pigment, etc. are required. Can be used accordingly.

When the recording medium according to the present invention is used in an ink jet recording method, its air permeability is 60 to 120 seconds / 1.
Preferably, it is controlled to about 00 cc. For this,
The air permeability of the paper substrate is 80 seconds / 100 cc or less, especially 30 to
It is preferably 60 seconds / 100 cc. In order to obtain such air permeability, the beating degree of the pulp raw material is set to 3
It is preferable that the paper is made from 0 to 50 ° SR, and a sizing agent, a wet paper strength agent, a filler, and the like are appropriately mixed into the paper as internal additives to make paper. It is also possible to control the air permeability by applying a surface paper strength enhancer during or after size press coating during papermaking.

The paper substrate has a Stechig sizing degree of 1
It is preferably from 0 to 100 seconds. When the Steckigt sizing degree is in the above range, good ink receptivity with little bleeding can be obtained, and good adhesion of the ink receiving layer to the paper substrate can be obtained. The sizing agent applied to the paper substrate in the present invention is not particularly limited, and examples thereof include a rosin (solution type, emulsion type), an alkyl ketene dimer, an alkenyl succinic anhydride, a wax, a styrene resin, an olefin resin, and styrene. An acrylic resin, a styrene-maleic acid-based resin, and the like can be given. The sizing agent is preferably added in an amount of about 0.1 to 1.0 part by weight based on 100 parts by weight of the pulp.

In addition, the wet strength agent that may be applied to the paper base in the present invention imparts water resistance as well as improvement in the degree of Stekigt sizing of the paper base. Preferred examples thereof include a melamine resin, a polyamide epichlorohydrin resin, and a urea resin, and the amount thereof is preferably about 0.01 to 1.0 part by weight based on 100 parts by weight of pulp.

The filler which may be applied to the paper substrate in the present invention controls the smoothness to facilitate the formation of the ink receiving layer, and improves the opacity to contribute to the concealing property. Preferred examples thereof include kaolin, clay, talc, titanium dioxide, calcium carbonate, and the like, and the amount used is 10 parts by weight based on 100 parts by weight of pulp.
It is generally not more than 5 parts by weight, preferably 0 to 5 parts by weight.

Further, the surface paper strength enhancer which may be applied to the paper base in the present invention aims to improve the air permeability and the Stechigt size of the paper base. Preferred examples thereof include oxidized starch, esterified starch, polyacrylamide, acrylic resin, polyvinyl alcohol, SBR,
Examples include NBR and vinyl oxide resins.
These are coated and used by a size press of a paper machine or an off-machine coater. The coating amount is 0.5 to 2.5 g /
m ² is preferable.

When a transparent base material is selected as the base material of the recording medium according to the present invention, examples thereof include polyester resin, diacetate resin, triacetate resin, and the like.
Acrylic resins, polycarbonate resins, polyvinyl chloride resins, polyimide resins, films or plates of cellophane, celluloid, etc., glass plates and the like can be mentioned. Further, a substrate obtained by coating or laminating a film of the above resin on both sides or one side of a substrate such as paper can be used as the substrate. According to a preferred embodiment of the present invention, when the substrate is transparent, a polyester film is preferable, and particularly preferably a biaxially stretched polyethylene terephthalate film on which corona treatment is performed on one or both sides is uniform without coating unevenness. It is preferable because coatability is obtained and good adhesion between the ink receiving layer and the substrate is obtained. Furthermore, it is also possible to use a polyethylene film containing a white inorganic pigment or whitened by containing fine bubbles inside the film as a base material.

The thickness of the substrate may be appropriately determined, but is generally preferably about 50 to 250 μm, and more preferably about 75 to 200 μm.

In the method according to the present invention, the ink receiving layer is formed by dissolving or dispersing the components for forming the ink receiving layer described later in water or a suitable solvent, for example, by a roll coating method or a blade coating method. Using appropriate methods such as coating method, air knife coating method, rod bar coating method, gravure coating method, comma coating method, die coating method, etc.
It can be distributed and implemented on a substrate.

The coating amount of the ink receiving layer after drying is as follows.
It is preferably from 5 to 30 g / m ² , particularly preferably from 10 to ² g / m ^2.
0 g / m ² .

This ink receiving layer may be formed with a pigment and a binder as main components. Examples of pigments include silica, clay, mica, swellable mica, talc, kaolin,
Examples include pigments such as diatomaceous earth, calcium carbonate, barium sulfate, aluminum silicate, synthetic zeolite, alumina, zinc oxide, lithopone, and satin white, and organic or inorganic coloring pigments. As the binder, for example, acrylic resin, polyester resin, polyurethane resin, styrene-butadiene copolymer resin, acrylonitrile-butadiene copolymer resin, polyvinyl alcohol-based resin, water-soluble polyvinyl acetal resin, polyvinyl butyral resin, and others Vinyl resin, amide resin,
Oxidized starch, casein, polyethylene oxide, polyvinylpyrrolidone, silicone resin, rosin-modified maleic resin, rosin-modified phenol resin, alkyd resin,
Water-soluble resins such as coumarone-indene resins and aqueous emulsion resins are exemplified.

The composition of the ink receiving layer may be appropriately determined in consideration of the ink absorbency, ink drying property, sharpness of a recorded image, and the like. According to a preferred embodiment of the present invention, a combination using a water-soluble resin such as a polyvinyl alcohol-based resin, a water-soluble polyvinyl acetal resin, or polyvinylpyrrolidone as a binder and using silica as a pigment is preferable. The mixing ratio in this case is as follows: resin: silica = 1: 1 to 1:15
Is preferable, and especially 1: 2 to 1:10 is preferable. According to a further preferred embodiment, the average particle size of the silica is 1 to 25 μm.
m (volume average particle diameter by Coulter counter method) is preferable, and particularly preferably 5 to 25 μm. Further, the content of silica is 30 to 9 in the ink receiving layer.
The content is preferably about 0% by weight, more preferably 50 to 80% by weight.

The ink receiving layer of the recording medium according to the present invention may contain other components for improving the characteristics of the recording medium. For example, a water-resistant agent such as a melamine formaldehyde resin, a urea formaldehyde resin, an acrylamide resin, glyoxal, or ammonium zirconium carbonate may be added in order to improve the water resistance of the ink receiving layer and to impart a function of preventing ink bleeding. In addition, dispersants, fluorescent dyes, fluorescent pigments, pH adjusters, defoamers, wetting agents, preservatives, ultraviolet absorbers, antioxidants to further enhance the productivity, recording characteristics, or storage stability of ink jet recording paper. An agent may be added.

In this embodiment, the coating amount of the ink receiving layer after drying is preferably from 5 to 80 g / m ² , particularly preferably from 10 to 50 g / m ² .

Further, according to a preferred embodiment of the present invention,
This ink receiving layer may be composed of two or more layers. Further, according to a preferred embodiment of the present invention, when the ink receiving layer consists of two layers, an ink receiving layer on the substrate side,
Further, it is preferable to provide a difference in the average particle diameter of silica in the second ink receiving layer provided thereon. In particular, when the average particle size of the silica in the ink receiving layer of the substrate is 1, the average particle size of the silica in the second layer is preferably 1 to 40.

Next, in the method according to the present invention, a coating liquid as a precursor of the glossy layer is further applied on the ink receiving layer provided on the substrate.

Here, the precursor coating liquid for the gloss layer may be a conventionally known precursor coating liquid for producing a gloss layer. For example, it may be composed of a white pigment, a binder component and a solvent component. As a white pigment, silica, preferably colloidal silica, amorphous silica, amorphous silica,
Examples thereof include silicic anhydrides, hydrous silicic acids, finely divided silica, and silicic acids called white carbon. Further, as the binder component, for example, acrylic resin,
Polyester resin, polyurethane resin, styrene-butadiene copolymer resin, acrylonitrile-butadiene copolymer resin, polyvinyl alcohol resin, water-soluble polyvinyl acetal resin, polyvinyl butyral resin, other vinyl resins, amide resin, starch oxide, casein,
Water-soluble resins such as polyethylene oxide, polyvinylpyrrolidone, silicone resins, rosin-modified maleic acid resins, rosin-modified phenol resins, alkyd resins, and coumarone-indene resins, and aqueous emulsion resins.

According to a preferred embodiment of the present invention, the glossy layer may further contain various additives for improving the characteristics of the recording medium. Preferred specific examples of such additives include an antioxidant, an ultraviolet absorber, a fluorescent brightener, a waterproofing agent, a fading inhibitor, an antistatic agent, and the like.

In the present invention, the viscosity of the coating liquid is not particularly limited, but is preferably about 1 to 1000 mpa · s for ease of application.

According to a preferred embodiment of the present invention, the glossy layer preferably comprises silica, more preferably colloidal silica. For colloidal silica,
The amount is preferably about 5 to 50% by weight in the gloss layer.

In the present invention, the method of applying the coating liquid to the surface of the ink receiving layer is not particularly limited as long as the coating liquid can be uniformly applied. For example, it may be applied by an air knife coating method, a rod bar coating method, a gravure coating method, or a reverse roll coating method. The coating amount of the coating liquid after drying may be appropriately determined in a range that realizes the weight of the gloss layer after drying, and is preferably, for example, about 7 to 35 g / m ² , and more preferably 9 to 20 g / m ^2. It is about.

Next, in the method according to the present invention, a film having a smooth surface, preferably a resin film, is superimposed on the formed coating liquid layer. The films need to be superposed with the coating liquid layer in an undried state, and it is preferable that the films be superimposed as soon as possible after application. The superposition is preferably performed between two rolls (nip rolls). The conditions for superposition (for example, pressure, temperature, etc.) may be appropriately determined within a range capable of realizing good gloss of the gloss layer and various characteristics of the recording medium, but a nip roll pressure of about 3 to 5 kg / cm ² is preferable. preferable.

In the method according to the present invention, a film is superimposed on the coating liquid layer and brought into close contact with each other, and then heated and dried to sufficiently dry the coating liquid layer. Heat drying, for example,
Air with a temperature of about 110-150 ° C, nozzle wind speed of 15m
Per minute or more for 30 seconds to 60 seconds, by applying to the film or to the substrate on which the film is not attached.

After drying, the substrate having the coating liquid layer to which the film is adhered is preferably wound up.

The conditions for peeling the film from the glossy layer surface, such as the angle and speed, are as follows:
The Beck smoothness and the desired coefficient of friction may be appropriately determined within a range of realizing the same.

The recording medium obtained by the method according to the present invention is used in a recording system using an ink composition. Examples of the recording method using the ink composition include an ink jet recording method, a recording method using a writing instrument such as a pen, and various other printing methods. Further, the ink composition is not limited to the liquid ink, and includes a solid colorant and a colorant which is used by heating and melting.
In particular, the recording medium according to the present invention is preferably used for an ink jet recording method. As an ink jet recording method, a method of discharging droplets using vibration of a piezoelectric element,
The method can be used in a method utilizing thermal energy, and other known or future inkjet recording methods. After printing with the ink composition, the recording medium according to the present invention may be dried and fixed by a suitable heat fixing means (for example, hot air, a heating roll / plate, infrared rays, etc.). Here, the ink composition means a black ink composition when performing monochrome printing, and a color ink composition when performing color printing, specifically, a yellow ink composition, a magenta ink composition, And a cyan ink composition, and in some cases, a black ink composition. further,
The recording medium according to the present invention includes a total of six colors of a yellow ink composition, two magenta ink compositions having different color densities, two cyan ink compositions having different color densities, and a black ink composition. May be used in a recording method using According to such a six-color ink composition and the recording medium of the present invention, a better printed image can be realized.

[0044]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

Production of paper base material A pulp raw material comprising 50% by weight of NBKP and 50% by weight of LBKP was prepared with a beater at a beating degree of 30 ° SR, and a raw material was prepared by adding an internal additive to the pulp at the following ratio. . This was paper-made by a fourdrinier paper machine, and then a coating liquid comprising the following coating chemicals was applied by a size press at 1.0 g / m ² and dried to prepare a paper substrate.

(1) Internally added chemicals Clay (manufactured by Kanaya Kogyo Co., Ltd., special grade clay) 2.25% by weight Talc (manufactured by Nippon Talc, SWB) 2.25% by weight Melamine resin (Sumitomo Chemical Co., Ltd., Sumirezuresin 607SY) ) 0.23% by weight Rosin size agent (Arakawa Chemical Co., Size Pine E) 0.5% by weight Sulfuric acid band (Nippon Light Metal Co., Ltd.) 2.7% by weight

(2) Coating chemicals Oxidized starch (SK-20, manufactured by Japan Corn Starch Co., Ltd.) 20 parts by weight Polyacrylamide (Polyaset 305, manufactured by Arakawa Chemical Co., Ltd.) 40 parts by weight Normal salt 0.5 part by weight Water 500 parts by weight

Production of Recording Medium (1) Production of Ink Receiving Layer An ink receiving layer coating liquid having the following composition was applied to one surface of the above-mentioned paper base material, and then dried to obtain a dry coating amount of 15 g.
/ M ² of the ink receiving layer.

Ink receiving layer coating liquid silica (trade name "Carbex BS304F" manufactured by Shionogi & Co., Ltd., average particle size 5.3 μm) 150 parts by weight polyvinyl alcohol (trade name "Gosenal T-330" Nippon Gohsei) 75% by weight Melamine-based crosslinking agent (trade name "SUMIREZ Resin SR613", manufactured by Sumitomo Chemical Co., Ltd., solid content 80%) 3.2 parts by weight Water 650 parts by weight

(2) Water-repellent treatment of the film The following water-repellent treatment liquids of the following coating liquids 1 to 4 were prepared, and were uniformly applied to the surface of a 75 μm polyethylene film by a spray gun so as to have a dry coating amount of 5 g / m ^2. And water-repellent polyethylene films 1 to 4 were produced.

Coating liquid 1 ・ Dai free 10 parts by weight (fluorine release agent: manufactured by Daikin Industries, Ltd.) ・ Ion exchange water 90 parts by weight Coating liquid 2 ・ SH7036 50 parts by weight (Silicone release agent: Toray Dow) 50 parts by weight of ion-exchanged water Coating liquid 3 10 parts by weight of Unidyne DS-101 (fluorinated surfactant: manufactured by Daikin Industries, Ltd.) 20 parts by weight of water-dispersed polyester resin (manufactured by Toyobo Co., Ltd.)・ 70 parts by weight of ion-exchanged water Coating liquid 4 ・ 100 parts by weight of Sumiflunone FP-76 (fluorine-based water repellent: manufactured by Sumitomo Chemical Co., Ltd.)

(3) Production of Recording Medium On the ink receiving layer, 200 parts by weight of spherical silica (trade name “Snowtex XL” manufactured by Nissan Chemical Co., Ltd., solid content 20%) and non-spherical silica (trade name “ Snowtex U
P "Nissan Chemical Co., Ltd., solid content 20%) 50 parts by weight,
Polyvinyl alcohol (trade name “Gosenal T-33
A coating solution containing 50 parts by weight of a glossy layer containing 50% by weight of “0” (manufactured by Nippon Synthetic Chemical Co., Ltd.) is applied by a microgravure coater, and immediately thereafter (the solid content of the coating solution layer is about 18. 3
%) And the above water-repellent polyethylene films 1 to 4 were superimposed and passed through a nip roll (pressure 4 kg / cm ² ). Then, a floating dryer (temperature 120
C.). Then, the substrate was wound up and left in a room temperature or 40 ° C. constant temperature bath for 0 hours, 24 hours, 48 hours, 72 hours, or 96 hours. After standing, the polyester film was peeled off, and at the same time as the film was peeled off, a back coat layer was formed on the back surface of the substrate.
Formation of the back coat layer, amorphous silica, carboxyl group-modified polyvinyl alcohol, polyamide epoxy resin, quaternary ammonium salt type cationic polymer,
A coating solution comprising a fluorescent dye was prepared and applied in the same manner as the above gloss layer coating solution.

The water-repellent polyethylene film 1
Each of the recording media manufactured by using Examples 1 to 4 was used in Example 1.
To 4. Further, a recording medium was manufactured in the same manner as described above except that a polyethylene film not subjected to the water-repellent treatment was used. This recording medium was used as Comparative Example 1.

Gloss Measurement The recording media of Examples 1 to 4 and Comparative Example 1 were measured by JI.
According to the measuring method specified in SZ8741, the 60-degree specular gloss was measured. The results were as shown in Table 1 below.

[0055] whether the film peelability peeled gloss layer components into the film remains attached, and observed by viewing the film peeled surface was evaluated by the following criteria.

The film is completely transparent and has no adhesion of the glossy layer component: ○ The film has a slight adhesion of the glossy layer component and is partially turbid white: Δ The film has the adhesion of the glossy layer component, and Cloudy white: x The results were as shown in Table 1 below.

Water Repellency of Film The static contact angle between the above water repellent polyethylene films 1 to 4 and the above gloss layer coating solution was measured. The values were as shown in Table 1 below in association with the recording media obtained by using the same.

1st Table Glossiness Film Releasability Contact Angle (Degree) Example 1 45 ９８ 98 Example 2 43 ９５ 95 Example 3 41 ９２ 92 Example 4 40 ９１ 91 Comparative Example 135 △ 76

Production of Recording Medium by Reusing Film The recording medium was produced by reusing the film used above and repeating the same method as described above. The recording media manufactured by recycling the water-repellent polyethylene films 1 to 4 were named Examples 11, 21, 31, and 41, respectively. Further, a recording medium obtained by recycling the polyethylene film not subjected to the water repellent treatment was used as Comparative Example 11.

For these recording media, the glossiness and the peelability of the film were evaluated in the same manner as described above. Further, the contact angle of the water-repellent polyethylene film used above before reuse was measured in the same manner as above.

The results were as shown in Table 2 below.

Second table glossiness Film peelability Contact angle (degree) Example 11 45 ○ 95 Example 21 43 ９３ 93 Example 31 40 92 Example 41 40 ９１ 91 Comparative example 11 35 × 52

Claims (9)

[Claims] 1. A method for producing a recording medium comprising at least an ink receiving layer and a gloss layer in this order on a substrate, comprising: forming an ink receiving layer on the substrate; On the ink receiving layer, a gloss layer precursor coating liquid is applied to form a coating liquid layer, and a film having a smooth surface is formed on the coating liquid layer. A film having a static contact angle of 90 ° or more with a coating liquid is superposed and adhered to each other, the coating liquid layer is dried to form a glossy layer, and the film is peeled off from the glossy layer. ,Method. 2. The method according to claim 1, wherein the film is provided with the contact angle by carrying a substance imparting water repellency on a surface thereof. 3. The method according to claim 2, wherein the substance imparting water repellency is a fluorine compound or a silicone compound. 4. A recording medium obtainable by the method according to claim 1. 5. A recording method comprising a step of printing on the recording medium according to claim 4, using an ink composition. 6. An ink jet recording method, comprising the steps of discharging droplets of an ink composition, attaching the droplets to the recording medium according to claim 4, and performing printing. 7. The recording method according to claim 5, wherein a yellow ink composition, a magenta ink composition, a cyan ink composition, and optionally a black ink composition are used as the ink composition. 8. An ink composition comprising a yellow ink composition, two magenta ink compositions having different color densities, two cyan ink compositions having different color densities, and optionally a black ink composition. The recording method according to claim 5, wherein a color ink composition is used. 9. A recorded matter recorded by the recording method according to any one of claims 5 to 8.