JP2001334743A - Glossy paper for liquid ink recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glossy paper for liquid ink recording having a desired gloss and a higher rate of ink absorption. SOLUTION: The glossy paper for liquid ink recording 10 comprises a base material 12, an intermediate layer 14 as an ink receiving layer formed on one of the main surfaces of the base material 12, a glossy layer formed on a surface of the intermediate layer 14, having a 60 degree specular glossiness according to JIS Z 8741 of 20% or higher, wherein the rate of liquid ink absorption is 60 seconds or lower.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid ink recording medium for printing, for example, an ink jet ink by an ink jet printer, and more particularly to a glossy liquid ink recording paper having gloss.

[0002]

2. Description of the Related Art In an ink jet recording system, minute droplets of ink are ejected from minute nozzles and fixed on a recording sheet such as paper to record images and characters.
There are many operating principles. Since it has features such as high speed, low noise, easy multi-coloring, great flexibility of recording patterns, and no need for development and fixing, it is used in various applications as a recording method for various figures and color images. ing.

[0003]

The art paper and coated paper used for general printing have a remarkably poor ink absorbency, so that the ink remains on the surface for a long time even after the end of the ink jet recording, and may be touched by the operator. When the recording surface is rubbed by touching a part of the apparatus, the image is stained with the residual ink. Further, in a high-density image area, there is a problem that a large amount of attached ink is mixed or flowed out without being absorbed, and its practicality as a liquid ink recording sheet such as an ink jet recording sheet is poor. In other words, such a recording sheet can provide a clear image with high density, can absorb ink quickly, does not cause ink to flow out, and, in addition, can form ink dots on the sheet surface. At the same time, it is required to suppress diffusion in the horizontal direction and increase the resolution. However, the characteristics of ink absorption and resolution, that is, the diffusion of ink in the horizontal direction, increase the absorption in the horizontal direction if the absorption increases, and if this is controlled,
Obviously, these are inconsistent properties such that the absorption itself is also reduced. In order to solve these problems, the size of the paper is adjusted, fillers with a large specific surface area, such as clay, talc, calcium carbonate, urea formalin resin, etc., and fine silica are applied, and the surface is adjusted. There are provided ink jet inks having a certain degree of ink jet aptitude, such as providing a coating layer having an ink absorbing ability. The sharpness of
It is not possible to obtain a good-looking image as seen in multicolor printing such as ordinary offset printing. In this way, the recording medium used in the ink jet recording method has a high density of printed dots, a fast absorption of the ink jet ink, and the ink flows even when the printed dots overlap. It is demanded that the dots do not bleed or bleed and that the diffusion of dots in the horizontal direction when printed is not unnecessarily large and is not blurred. On the other hand, since a recording medium having a higher surface gloss is conventionally preferred by consumers, an inkjet recording medium having a gloss finish has been proposed. Is desired.

[0004] Therefore, a main object of the present invention is to provide a glossy paper for liquid ink recording having a desired gloss and a high ink absorption speed.

[0005]

Means for Solving the Problems The present invention relates to a base material, an intermediate layer as an ink receiving layer formed on one main surface of the base material, and a 60 ° mirror surface according to JIS Z8741 formed on the surface of the intermediate layer. A glossy paper for liquid ink recording comprising a gloss layer having a gloss of 20% or more, wherein the glossy paper for liquid ink recording has a liquid ink absorption rate of 60 seconds or less.

In the present invention, the glossy layer is formed by applying a coating composition on the intermediate layer, and adhering the smooth surface of a film having a smooth surface on the coating composition to form a gloss layer. Thereafter, the film is preferably formed by peeling the film from the gloss layer.

In the present invention, the gloss layer is formed by coating a coating composition on the smooth surface of a film having a smooth surface, and laminating the coating surface of the coating composition on an intermediate layer to form a gloss layer. Thereafter, the film may be formed by peeling the film from the gloss layer.

Furthermore, in the present invention, it is preferable that the glossy layer is formed by applying a coating composition containing a colloidal silica composite emulsion.

In the present invention, the gloss layer may be provided by coating a material obtained by mixing a filler having low water absorption such as colloidal silica and a water-soluble resin or an emulsion resin.

Further, in the present invention, it is preferable that the intermediate layer constitutes an ink receiving layer for receiving the liquid ink, and is formed so that the liquid ink permeates the intermediate layer through the fine holes formed in the glossy layer.

In the present invention, the intermediate layer contains an ink fixing agent and a pigment that absorbs a dye or the like of the ink.
It is preferable that the liquid ink is formed so as to be adsorbed on the pigment.

Further, in the present invention, the pigment of the intermediate layer preferably contains synthetic silica.

According to the present invention, the glossy layer has a thickness of JIS Z874.
Since the 60 ° specular gloss according to No. 1 is 20% or more and the liquid ink absorption speed is 60 seconds or less, the requirements of glossiness and ink absorption speed can be simultaneously achieved.

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments of the present invention with reference to the drawings.

[0015]

FIG. 1 is a schematic sectional view of a glossy paper for liquid ink recording according to an embodiment of the present invention. In the glossy paper 10 for liquid ink recording, an ink receiving layer 14 as an intermediate layer for receiving an oil-based or aqueous inkjet ink is formed on one main surface (front surface) of a base material 12 as a support material. A gloss layer 16 located on the outermost surface is formed on a main surface (front surface) opposite to the main surface on the base material 12 side. As the base material 12 serving as a support, paper such as high-quality paper having been subjected to moderate sizing, non-size paper, and further a thermoplastic synthetic resin film can be used, and the material thereof is not particularly limited. As the film, polyester, polystyrene, polyvinyl chloride, polymethyl methacrylate, cellulose acetate and the like are usually used.

The ink receiving layer 14 is formed on the base material 12 serving as a support material.
And at least one layer between the gloss layer 16. The coating composition 14 'for forming the ink receiving layer 14 is obtained by mixing an inorganic pigment and / or an organic pigment with an ink fixing agent, a binder, other pigment dispersants, a water resistance agent, and the like.

The filler constituting the coating composition 14 'includes pigments such as silica, colloidal silica, calcium carbonate, and aluminum oxide. More specifically, the pigment includes inorganic fine particles. Examples of the inorganic fine particles include silica fine particles, colloidal silica, calcium silicate, zeolite, kaolinite, halloysite, muscovite, talc, calcium carbonate, calcium sulfate, and boehmite. And pseudo-boehmite. In terms of not lowering the transparency, the refractive index is 1.4.
Those in the range of 0 to 1.60 are preferred, and silica fine particles are particularly preferred. The average primary particle diameter of the inorganic fine particles is generally 30 nm or less, preferably 15 nm or less, particularly preferably about 3 to 10 nm from the viewpoint of transparency. Further, the refractive index is preferably around 1.45.

The silica fine particles are liable to adhere to each other due to hydrogen bonding due to silanol groups on the surface. Further, when the average primary particle diameter is 10 nm or less, a structure having a particularly high porosity can be formed. It is effective for improving characteristics. Silica fine particles that can be used are roughly classified into a wet method and a dry method according to the production method. In the wet method, the mainstream is a method in which active silica is generated by acid decomposition of a silicate, which is appropriately polymerized, coagulated and sedimented to obtain hydrous silica.
On the other hand, dry silica is a method by high-temperature gas-phase hydrolysis of silicon halide (flame hydrolysis method), a method in which silica sand and coke are heated and reduced by an arc in an electric furnace and oxidized with air ( The method of obtaining anhydrous silica by the arc method is the mainstream. These hydrated silica and anhydrous silica have differences in the density of silanol groups on the surface, the presence or absence of vacancies, etc.
Although different properties are shown, it is known that silicic anhydride (anhydrous silica) forms a three-dimensional structure having a particularly high porosity, and is preferable for use in the present invention.

In the case of silica fine particles, the type of resin to be combined with the silica fine particles is important from the viewpoint of the transparency of the porous layer. In the case of anhydrous silica, it is preferable to use polyvinyl alcohol (PVA) as a water-soluble resin. Among them, particularly low saponification degree, specifically, saponification degree 70 to 90
% Polyvinyl alcohol is preferred in terms of light transmission. PVA has a hydroxyl group in the structural unit, and the hydroxyl group and a silanol group on the surface of the silica fine particles form a hydrogen bond to facilitate formation of a three-dimensional network structure in which the secondary particles of the silica fine particles are chain units. Thus, it is considered that a coloring material receiving layer having a structure with a high porosity can be obtained. The porous layer having a three-dimensional network structure rapidly absorbs ink by capillary action in ink jet recording, and enables not only fine recording without ink bleeding and ink accumulation, but also coloring material in thermal recording, Then, the toner in the electrophotographic recording can be firmly bonded. That is, the coloring material or the toner penetrates into the pores of the porous layer, and the three-dimensional network structure causes a shape anchor effect, whereby the coloring material or the like is firmly fixed. Further, since the ratio of the inorganic fine particles constituting the transparent layer is large, the heat resistance is high and the emboss resistance is high.

Examples of the ink fixing agent (cationizing agent) constituting the coating composition 14 'include quaternary ammonium salt polymers, polyamines and derivatives thereof, alkylamine polymers, and dicyandiamide type cationic resins. In particular, secondary amines, tertiary amines, and quaternary ammonium salts which form insoluble salts with sulfonic acid groups, carboxyl groups, amino groups, etc. in water-soluble direct dyes and water-soluble acid dyes which are the dye components of aqueous inks When the cationic ink fixing agent is mixed, the dye is captured in the ink receiving layer 14. Therefore, it is possible to suppress the outflow and bleeding of the ink when water is dropped or when moisture is absorbed due to the improvement in color and the formation of an insoluble salt.

As the binder constituting the coating composition 14 ', PVA such as silicon-modified polyvinyl alcohol, starch, SBR latex, acrylic resin,
Urethane resins and the like can be mentioned. More specifically, the binder includes, for example, starch derivatives such as oxidized starch, etherified starch, and phosphated starch; cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose; casein, gelatin, soy protein,
Polyvinyl alcohol or derivatives thereof; polyvinyl alcohol of various degrees of oxidation or silanol modified products thereof, carboxylated products, cationized products, etc .; polyvinyl pyrrolidone, maleic anhydride resin, styrene-butadiene copolymer, methyl methacrylate-butadiene copolymer Such as conjugated diene copolymer latex; acrylic polymer latex such as acrylate and methacrylate polymer or copolymer; vinyl polymer latex such as ethylene vinyl acetate copolymer; Functional group-modified polymer latex with a monomer containing a functional group such as a carboxy group of a coalescence; melamine resin,
Aqueous adhesives such as thermosetting synthetic resins such as urea resins; acrylics such as polymethyl methacrylate; acid esters; polymer or copolymer resins of methacrylic acid esters; polyurethane resins, unsaturated polyester resins, vinyl chloride-vinyl acetate Synthetic resin-based adhesives such as copolymers, polyvinyl butyral, and alkyd resins can be used.

In addition, the coating composition 14 'for forming the ink receiving layer 14 may contain a water-resistant agent such as a melamine resin, if necessary. Further, other components may be added to the coating composition 14 'for various purposes. For example, pigment dispersants, thickeners, flow improvers, defoamers, defoamers, release agents, foaming agents, penetrants, coloring dyes, coloring pigments, fluorescent brighteners, ultraviolet absorbers,
Various additives such as an antioxidant, a preservative, an anti-binder, a wet paper strength enhancer, and a dry paper strength enhancer can be appropriately compounded according to the purpose.

The mixing ratio of the pigment and the binder in the coating composition 14 'for forming the ink receiving layer 14 is such that the binder is 3 to 70 parts by weight with respect to 100 parts by weight of the pigment, and more preferably 5 to 70 parts by weight. 50 parts by weight. When the blending ratio of the binder to 100 parts by weight of the pigment is 3
If the amount is less than the weight part, the coating strength of the ink receiving layer 14 may be insufficient. On the other hand, if the blending ratio of the binder exceeds 70 parts by weight, the ink absorbency of the ink receiving layer 14 may decrease.

An example of the mixing ratio of the pigment and the binder in the coating composition 14 'for forming the ink receiving layer 14 is as follows. For example,
100 parts by weight of solid or powdery amorphous silica (silicon dioxide SiO ₂ ) which is a porous material as a pigment, 45 parts by weight of polyvinyl alcohol as a binder and 45 parts by weight of a liquid material as an ink fixing agent 30 parts by weight of a polyamine derivative of the above, 10 parts by weight of an acetal (formal) as a waterproofing agent, and 1 part by weight of a powdery hexametaphosphoric acid as a dispersant were mixed, An ink receiving layer 14 can be formed.

The coating amount of the coating composition 14 'for forming the ink receiving layer 14 varies depending on the required gloss, ink absorbency, type of the support, and the like, and cannot be determined unconditionally. / M ² or more, preferably 5 to 1
5 g / m ² . Further, the ink receiving layer 14 may be provided by applying a certain amount of coating twice.

The application of the coating composition 14 ′ for forming the ink receiving layer 14 can be performed by using various coating apparatuses on-machine or off-machine. Examples of the coating device include various blade coaters, roll coaters, air knife coaters, bar coaters, rod blade coaters, curtain coaters, short dwell coaters, size presses, and the like. After the ink receiving layer 14 is applied to smooth the ink receiving layer 14, the ink receiving layer 14 may be flattened using a calender such as a machine calender, a TG calender, or a soft calender.
The number of the ink receiving layers 14 can be appropriately determined as needed, and may be one layer or a plurality of layers.

Next, the gloss layer 16 will be described. The gloss layer 16 has transparency and is composed of a coating composition 16a made of a colloidal silica composite emulsion or the like, and is provided at least one layer on the substrate 12 serving as a support and the ink receiving layer 14. As the colloidal silica composite emulsion, colloidal silica / acryl / styrene or colloidal silica / acryl can be selected. The coating composition 16a for forming the gloss layer 16 may be composed mainly of a colloidal silica composite emulsion or composed mainly of a mixture of a filler and a binder. As the filler in this case, the same pigment as the ink-absorbing pigment used in the ink receiving layer 14 described above can be used, but colloidal silica is preferable. Further, as the binder, the same binder as the above-described ink receiving layer 14 can be used, but a water-soluble resin is preferable. Examples of the water-soluble resin include a resin having a dissociable group such as a hydrophilic structural unit or a carboxyl group,
For example, polyvinyl alcohol (PVA), which is a resin having a hydroxyl group as a hydrophilic structural unit, cellulosic resins (methyl cellulose (MC), ethyl cellulose (EC), hydroxyethyl cellulose (HE)
C), carboxymethylcellulose (CMC), chitins and starch; polyethylene oxide (PEO), polypropylene oxide (PPO), polyethylene glycol (PE) which are resins having an ether bond.
G) and polyvinyl ether (PVE); and polyacrylamide (PAAM) and polyvinylpyrrolidone (PV), which are resins having an amide group or an amide bond.
P). Also, polyacrylates having a carboxyl group as a dissociable group, maleic acid resins, alginates and gelatins; polystyrene sulfonates having a sulfone group, amino groups, imino groups,
Mention may be made of polyallylamine (PAA) with amines and quaternary ammonium salts, polyethyleneimine (PEI), epoxidized polyamide (EPAm), polyvinylpyridine and gelatins. Specifically, for example, 0.001 to 100 parts by weight may be mixed with 100 parts by weight of colloidal silica as a filler. However, when the amount of the water-soluble resin is 0.001 or less, the coating strength of the glossy layer is hardly obtained, and the coatability is deteriorated. It does not pass through layer 16 to ink receiving layer 14.
In order to appropriately impart water resistance to polyvinyl alcohol or the like, for example, a water-resistant agent of a urea glyoxal / acrylamide polymer may be mixed or a curing agent may be mixed.

The glossy paper 10 is formed so that the surface of the glossy layer 16 is smooth, thereby providing a glossy paper 10 for liquid ink recording having a beautiful gloss. As for the gloss of the gloss layer 16, the 60 ° specular gloss according to JIS Z8741 is 20% or more.

In order to manufacture such a glossy paper 10 for recording a liquid ink, a coating composition 16a for forming a glossy layer 16 is first applied onto a substrate 12, and as shown in FIG. The smooth surface of the film 18 is brought into close contact with the layer material 16a. Examples of the film 18 having a smooth surface include a polyethylene film, a polypropylene film, a polyamide (nylon) film, a polyester film, a polyethylene naphthalate film, a polystyrene film, a polyvinyl alcohol (vinylon) film, a polyether ketone film,
Polysulfone film, polyethersulfone film, polyetherimide film, ethylene copolymer film such as EVA copolymer film and ionomer film, polycarbonate film, cellophane film, polyvinyl chloride film, polyvinylidene chloride film, aluminum foil, acetate A film such as a film, a single film having a smooth surface other than this, or a paper and a film obtained by laminating these films can be used. In order to improve the releasability from the gloss layer 16, a release agent may be applied to the smooth surface.

After the smooth surface of the film 18 is brought into close contact with the applied coating composition 16a, the coating composition 16a is dried into a film to form a gloss layer 16, and then the film 18 is peeled off. In FIG. 2, the material 16a of the glossy layer indicated by diagonal lines is in an undried state. After the smooth surface of the film 18 is adhered, the surface of the peeled gloss layer 16 becomes smooth, and a beautiful gloss paper 10 can be obtained. Therefore, in the manufacturing process of the glossy paper 10, the manufacture of the glossy paper can be simplified without the need of an ultraviolet irradiation device or the like. In the step of applying the coating composition 16a, the same apparatus as that exemplified as the apparatus for applying the coating composition 14 'can be used.

As another method, in order to form the gloss layer 16, a gloss layer material 16a may be first applied to the smooth surface of the film 18, as shown in FIG. In this case, before the gloss layer material 16a dries, the layer of gloss layer material 16a is pressed against the surface of the ink receiving layer 14. Then, after the gloss layer 16 is dried and the gloss layer 16 is formed, the film 18 is peeled from the gloss layer 16. As described above, the gloss layer material 16a may be applied to the substrate 12 side, or may be applied to the film 18 side.
By peeling the film 18 after the gloss layer 16 is formed, gloss paper 10 having gloss can be obtained.

The glossy layer 16 of the glossy paper 10 is formed as a porous film or layer having a plurality of fine holes. Liquid ink such as ink-jet ink supplied from an ink-jet printer or the like passes through the glossy layer 1 through fine holes.
6 and soaks into the ink receiving layer 14 and is fixed.

Next, the liquid ink applied to the glossy paper 10 for ink jet recording of this embodiment will be described. This liquid ink is an aqueous ink, and the aqueous ink is a recording liquid including a colorant, a liquid medium, and other additives. As the coloring agent, a direct dye, an acid dye, a basic dye, a reactive dye, or a water-soluble dye such as a food colorant is used.

Examples of the direct dye include, but are not limited to, C.I. I. Direct Black 48, 49, 51, 56, 62, 71, 74, 75, 7
7, 78, 80 C.I. I. Direct Yellow 42, 44, 48, 50, 51, 58, 72, 85, 8
6,87,88,98 C.I. I. Direct Orange 77, 80, 81, 83, 84, 85, 90, 94, 9
9, 101, 108 C.I. I. Direct Red 75, 77, 80, 81, 83, 84, 85, 90, 9
4,99,101 C.I. I. Direct Blue 120, 123, 158, 163, 165, 192, 1
93, 194, 195 C.I. I. Direct Green 1, 6, 8, 28, 33, 37, 63, 64 C.I. I. Direct Brown 2,6,25,27,44,58,95,100,10
6, 112, 173 and the like are used.

The acid dye is not particularly limited, but examples thereof include C.I. I. Acid Black 60, 94, 107, 109, 112, 118, 11
9, 121, 122 C.I. I. Acid Orange 7, 8, 10, 33, 56, 64 C.I. I. Acid Red 85, 87, 88, 89, 92, 94, 97, 106,
108, 110 C.I. I. Acid Violet 7, 11, 15, 34, 35, 41, 43, 49, 75 C.I. I. Acid Blue 93, 102, 104, 111, 113, 117, 12
0, 124, 126 C.I. I. Acid Green 3, 12, 19, 27, 41, 9, 16, 20, 25 C.I. I. Acid Brown 4,14 and the like are used.

The basic dye is not particularly restricted but includes, for example, C.I. I. Basic Black 2,8 C.I. I. Basic Yellow 1, 2, 11, 12, 14, 21, 32, 36 C.I. I. Basic Orange 2,15,21,22 C.I. I. Basic Red 1, 2, 9, 12, 13, 37 C.I. I. Basic Violet 1,3,7,10,14 C.I. I. Basic Blue 1,3,5,7,9,24,25,26,28,29 C.I. I. Basic Green 1,4 C.I. I. Basic Brown 1,12 or the like is used.

The reactive dye is not particularly restricted but includes, for example, C.I. I. Reactive Black 1,3,5,6,8,12,14 C.I. I. Reactive Yellow 1,2,3,13,14,15,17 C.I. I. Reactive Orange 2,5,7,16,20,24 C.I. I. reactive Red 6,7,11,12,15,17,21,23,24,
35, 36, 42 C.I. I. Reactive Violet 2,4,5,8,9 C.I. I. Reactive Blue 2,5,7,12,13,14,15,17,18,1
9, 20, 21, 25 C.I. I. Reactive Green 5, 7 C.I. I. Reactive Brown 1, 7, 16 and the like are used.

Further, the food colorant is not particularly limited. I. Food Black 2 C.I. I. Food Yellow 3,4,5 C.I. I. Food Red 2,3,7,9,14,52,87,92,94,10
2,104,105 C.I. I. Food Violet 2 C.I. I. Food Blue 1,2 C.I. I. Food Green 2,3 or the like is used.

Examples of the liquid medium of the aqueous ink include water and various water-soluble organic solvents, for example, polyhydric alcohols such as diethylene glycol, and lower alkyls of polyhydric alcohols such as triethylene glycol monomethyl ether and triethylene glycol monoethyl ether. Ethers are preferred. Other additives include, for example, p
Examples include H regulators, sequestering agents, fungicides, viscosity regulators, surface tension regulators, wetting agents, surfactants, and rust inhibitors.

Hereinafter, specific embodiments will be described. (Example 1) Ink receiving layer 100 parts by weight of synthetic silica as a filler, 45 parts by weight of polyvinyl alcohol as a binder, and 2 parts by weight of a polyamine derivative as an ink fixing agent.
5 parts by weight and 5 parts by weight of a urea glyoxal / acrylamide polymer as a waterproofing agent were mixed at a weight ratio to form a coating composition 14 '. 10 g / m ² (D
RY) was applied to form an ink receiving layer 14. When 2 microliters of the liquid ink was dropped on the ink receiving layer 14 with a micropipette, the time until the ink was completely absorbed was 30 seconds. In addition, in this example, the ink absorption speed was measured under a microscope from the moment when the aqueous ink droplet for ink jet was attached to the surface to the time when all the ink droplets were absorbed. Gloss layer 95 parts by weight of colloidal silica and 5 parts by weight of PVA were mixed to prepare a coating composition 16a. The coating composition 16a was coated on the ink receiving layer 14 with 7 g /
m ² (DRY) was applied and dried to form a gloss layer 16. The glossy layer 16 of the glossy paper 10 thus obtained was subjected to 60 ° according to JIS Z8741.
The specular gloss was measured. Further, 2 microliters of the liquid ink was dropped on the gloss layer 16 with a micropipette, and the time until the ink was completely absorbed was measured. Furthermore, the degree of bleeding when printing with an inkjet printer was visually confirmed. Table 1 shows the test results.

Example 2 Ink receiving layer was formed in the same manner as in the above-described example. Glossy layer 85 parts by weight of colloidal silica and 15 parts by weight of a water-soluble polyester resin were mixed to prepare a coating composition 16a. The coating composition 16a was applied on the ink receiving layer 14 by applying 7 g / m ² (DRY) and dried to form a gloss layer 16. The glossy paper 10 thus obtained was tested under the same conditions as in Example 1 and the results are shown in Table 1.

(Example 3) Ink receiving layer was formed in the same manner as in the above example. Gloss layer 95 parts by weight of colloidal silica and 5 parts by weight of casein were mixed to prepare a coating composition 16a. 7 g of this coating composition 16a on the ink receiving layer 14
/ M ² (DRY) by applying and drying
A gloss layer 16 was formed. The glossy paper 10 thus obtained was tested under the same conditions as in Example 1 and the results are shown in Table 1.

(Example 4) Ink receiving layer was formed in the same manner as in the above-described example. Gloss layer A coating composition 16a was prepared with a colloidal silica composite emulsion. This coating composition 16a
Was applied on the ink receiving layer 14 by applying 7 g / m ² (DRY) and dried to form a gloss layer 16. The glossy paper 10 thus obtained was tested under the same conditions as in Example 1 and the results are shown in Table 1.

Example 5 Ink receiving layer was formed in the same manner as in the above-described example. Gloss layer 100 parts by weight of colloidal silica and 20 parts by weight of silicone acrylic emulsion resin were mixed to prepare a coating composition 16a. This coating composition 16a
Was applied on the ink receiving layer 14 by applying 7 g / m ² (DRY) and dried to form a gloss layer 16. The glossy paper 10 thus obtained was tested under the same conditions as in Example 1 and the results are shown in Table 1.

(Comparative Example) Ink receiving layer was formed in the same manner as in the above-described embodiment. Gloss layer 100 parts by weight of colloidal silica and 30 parts by weight of silicone acrylic emulsion resin were mixed to prepare a coating composition 16a. This coating composition 16a
Was applied on the ink receiving layer 14 by applying 7 g / m ² (DRY) and dried to form a gloss layer 16. The glossy paper 10 thus obtained was tested under the same conditions as in Example 1 and the results are shown in Table 1.

[0046]

[Table 1]

As is evident from Table 1, in Examples 1 to 5, good results were obtained in all of the glossiness, absorption time, and printing bleeding. However, in the comparative example, although the glossiness was good, the ink absorption time required was 60 seconds or more, and printing bleeding occurred.

The glossy paper for liquid ink recording of this embodiment can be used not only for the above-mentioned aqueous ink but also for various recording media using ink that is liquid at the time of recording. As such a recording medium, for example,
The donor sheet is an ink sheet obtained by applying a hot-melt room-temperature solid ink consisting mainly of waxes and resin components and dyes and pigments to a thin support such as a resin film, high-density paper, or synthetic paper. A hot-melt transfer recording medium that heats from the back surface of the ink of the donor sheet to melt and transfer the ink, an ink-jet recording medium that heats and melts the hot-melt room-temperature solid ink as described above to form fine droplets, and performs flight recording, oil Examples include an ink jet recording medium using an ink in which a soluble dye is dissolved in a solvent, an image receiving recording medium of a photosensitive pressure-sensitive donor sheet using microcapsules containing a photopolymerizable monomer, a colorless or colored dye and / or a pigment, and the like. . What is common to these recording media is that the ink is in a liquid state during recording.
The liquid ink permeates or spreads in the depth direction or the surface direction of the ink receiving layer of the recording medium until it is cured, solidified or fixed. For this reason, the recording medium also needs to have absorptivity according to each method. Therefore, the glossy paper according to the present invention can be used as the various recording media described above.

[0049]

According to the present invention, it is possible to obtain a glossy paper for recording a liquid ink, which has a high absorption and fixing speed of the liquid ink and has a high glossiness.

[Brief description of the drawings]

FIG. 1 is an illustrative sectional view of a glossy paper for liquid ink recording according to an embodiment of the present invention.

FIG. 2 is a schematic sectional view showing a step of attaching a film on a material of a gloss layer in order to produce the glossy paper for liquid ink recording shown in FIG.

FIG. 3 is a schematic sectional view showing a step of laminating a gloss layer formed on a film on a material of an intermediate layer in order to manufacture the glossy paper for liquid ink recording shown in FIG.

[Explanation of symbols]

 Reference Signs List 10 glossy paper for liquid ink recording 12 base material 14 ink receiving layer 16 glossy layer 16a coating composition for forming glossy layer 18 film

Claims (8)

[Claims] 1. A base material, an intermediate layer formed on one main surface of the base material as an ink receiving layer, and a 60 ° specular gloss according to JIS Z8741 formed on the surface of the intermediate layer is 20% or more. What is claimed is: 1. A glossy paper for liquid ink recording comprising a glossy layer, wherein the glossy paper for liquid ink recording has a liquid ink absorption speed of 60 seconds or less. 2. The gloss layer is obtained by applying a coating composition on the intermediate layer, making the smooth surface of a film having a smooth surface adhere to the coating composition, and forming the gloss layer into a film. The glossy paper for liquid ink recording according to claim 1, wherein the glossy paper is formed by peeling the film from the glossy layer. 3. The gloss layer is obtained by applying a coating composition to a smooth surface of a film having a smooth surface, and laminating the coating surface of the coating composition on the intermediate layer to form the gloss layer. The glossy paper for liquid ink recording according to claim 1, wherein the glossy paper is formed by peeling the film from the glossy layer. 4. The glossy paper for liquid ink recording according to claim 1, wherein said glossy layer is provided with a coating composition containing a colloidal silica composite emulsion. 5. The glossy layer according to claim 1, wherein a material obtained by mixing a filler having low water absorption such as colloidal silica and a water-soluble resin or an emulsion resin is applied. Glossy paper for liquid ink recording. 6. The intermediate layer comprises an ink receiving layer for receiving a liquid ink, and is formed such that the liquid ink permeates into the intermediate layer through fine holes formed in the glossy layer. The glossy paper for liquid ink recording according to claim 5. 7. The intermediate layer according to claim 1, wherein the intermediate layer includes an ink fixing agent and a pigment that absorbs a dye or the like of the ink, and is formed such that the liquid ink is absorbed by the pigment. The glossy paper for liquid ink recording according to the above. 8. The glossy paper for liquid ink recording according to claim 7, wherein the pigment of the intermediate layer contains synthetic silica.