Data storage device

FIELD: printing.

SUBSTANCE: data storage device comprises a substrate and at least one ink receiving layer. The first ink receiving layer, which represents at least one ink receiving layer, comprises inorganic particles having an average primary particle size of 1 mcm or less, and the inorganic particles coated with the metal oxide. The inorganic particles covered with the metal oxide have an average primary particle size of 15.0 mcm or more. When the maximum value of the FLOP data storage device is represented as FLOPMax and the minimum value of FLOP is represented as FLOPMin, the FLOPMin is 2.5 or more and the value FLOPMin/FLOPMax is 0.80 or more and 1.00 or less.

EFFECT: proposed data storage device has a high degree of pearl lustre.

8 cl, 2 dwg, 3 tbl

 

BACKGROUND of the INVENTION

The technical field

[0001] the Present invention relates to the media.

The level of technology

[0002] the Characteristic that in the last time is required for image registered by way of registration of images is a high quality gloss. As a method of obtaining such images is investigated way to make mother-of-pearl gloss (hereinafter referred to in this document also referred to as the "pearl Shine") to the media, the Desk on which the subject image. In lined with Japanese application No. 2004-276418 disclosed to the media that contains the base covered with the resin layer containing a pigment with a pearl effect, and water-soluble resin, and the ink receiving layer. In lined with Japanese application No. 2011-037162 disclosed to the media containing the base, the first ink receiving layer containing inorganic particles and a pigment with a pearl effect, and the second ink receiving layer containing inorganic particles. In Japanese translation of PCT publication No. 2011-511316 disclosed to the media that contains the base covered with the resin layer containing a pigment with a pearl effect and polyolefin, and the ink receiving layer. In Japanese translation of PCT publication No. 2011-511316 described value is their FLOP as an indicator, which is a pearly luster.

DISCLOSURE of INVENTIONS

[0003] According to research conducted by the authors of the present invention, despite the fact that the media described in Japanese laid bids No. 2004-276418 and 2011-037162 and Japanese translation of PCT publication No. 2011-511316, to a certain extent reveal a pearl Shine, the resulting images do not have a high gloss, which is required in recent years. That is, the degree of pearls luster is not sufficient.

[0004] Accordingly, the present invention relates to a data carrier having a high degree of pearls luster.

[0005] a storage Medium according to one aspect of the present invention relates to a base and at least one ink receiving layer. The first ink receiving layer, which represents the at least one ink receiving layer contains inorganic particles having an average primary particle size of 1 μm or less, and the inorganic particles coated with a metal oxide, and inorganic particles coated with the metal oxide have an average primary particle size of 15.0 μm or more. When the maximum value of the FLOP of the media represented by the formula below, indicate FLOPMaxand the minimum value of the FLOP denote FLOPMin,FLOP Minis 2.5 or more and is FLOPMin/FLOPMaxis over 0.80 or more and 1.00 or less:

is FLOP=2,69×(L*15°-L*110°)1,11/L*45°0,86,

where L*15°indicates the brightness of reflected light at an angle offset 15°, L*45°indicates the brightness of reflected light at an angle offset 45° and L*110°indicates the brightness of reflected light at an angle offset 110°.

[0006] According to this aspect of the present invention can provide a storage medium having a high degree of pearls luster.

[0007] further characteristics of the present invention will become apparent from the following description of exemplary embodiments with reference to the attached drawings.

BRIEF DESCRIPTION of DRAWINGS

[0008] In Fig. 1A and 1B shows views illustrating a method of measuring values FLOP in the present invention.

The IMPLEMENTATION of the INVENTION

[0009] the Present invention is described in detail by means of embodiments. First described is FLOP, which is an indicator that represents a pearly lustre media.

[0010] it is Known that the degree of pearls luster image perceived by visual observation by a person in a high degree associated with brilliance, brightness, etc. of the image. On the other hand, the General Chapter is finally assessed by observation of specularly reflected light with respect to incident light. However, brightness, etc. of the image perceived by visual observation by a person, not necessarily a high degree associated with specularly reflected light. In other words, even when the overall gloss of the image is high, people do not necessarily perceive that the Shine and brightness of the image is high and, therefore, by visual observation, it seems that the image has a pearly luster. The solution to this problem is directed FLOP, known as the index, which is a pearly luster, which is highly associated with brilliance, brightness, etc. that is perceived by visual observation by a person. The value of the FLOP is an indicator, which is mainly used in the field of coating laid out and described in Japanese patent No. 2007-254754, and so on

[0011] In particular, the FLOP is represented by the formula (1) below:

is FLOP=2,69×(L*15°-L*110°)1,11/L*45°0,86Formula (1)

L*15°: The brightness of reflected light at an angle offset 15° with respect to incident light at 45°

L*45°: The brightness of reflected light at an angle offset of 45° with respect to the incident light at 45°

L*110°: Brightness of tragen the th light at an angle offset 110° with respect to incident light at 45°

[0012] the Reflected light at an angle offset θ (15°, 45° or 110°) with respect to the incident light at 45° shown in Fig. 1A.

[0013] as a result of research conducted by the authors of the present invention found that when the value of the FLOP of the storage medium is equal to or exceeds a certain high value, i.e., when described below FLOPMinis 2.5 or more, regardless of the direction of incidence of light from the light source, the person perceives that the Shine and brightness of the image is high, when people visually observes the image. In addition, FLOPMinpreferably is 3.0 or more and more preferably 4.0 or more.

[0014] Also found that when the homogeneity values FLOP media is high, i.e. when the value described below FLOPMin/FLOPMaxis over 0.80 or more and 1.00 or less, the person feels that the high gloss and brightness are homogeneous and, thus, the image has a higher degree pearly luster. In addition, the value of FLOPMin/FLOPMaxpreferably 0.85 or more and 1.00 or less, and more preferably 0.90 or more and 1.00 or less.

[0015] Methods of obtaining FLOPMax, FLOPMinand FLOPMin/FLOPMaxin the present invention are described below. In Fig. 1B presents a view of the media, when it is viewed in n the Board, perpendicular to the surface of the media. First, as illustrated in Fig. 1B, a certain direction from the observation point in the media information is defined as the direction of 0°. Subsequently, the values FLOP (36) is measured in increments of 10° in the directions from 0° to 360° (one circle) angle φ of the light source relative to the direction of 0°. Then among the measured values FLOP 36 directions, in relation to the direction which gives the maximum value of the FLOP, and direction, which provides the minimum value of the FLOP, values FLOP additionally measured in the directions of ±5° with increments of 1°. Among these values FLOP maximum is defined as the FLOPMaxand the minimum is defined as the FLOPMin. Is FLOPMin/FLOPMaxcalculated by FLOPMaxand FLOPMin. In the present invention, L*15°L*45°and L*110°in the formula, which represents the value of the FLOP, measured using a Gonio-spectrophotometric color measurement system GCMS-3B (manufactured by the company Murakami Color Research Laboratory Co., Ltd.).

Media

[0016] the storage Medium according to one of embodiments of the present invention relates to a base and at least one ink receiving layer. In the present invention, the information carrier may be a carrier of information is to jet ink, used in the way of Desk jet ink. The components of the information carrier according to one of embodiments of the present invention, is described below.

<Base>

[0017] Examples of bases include base containing only the base paper, and the basis of containing base paper and the resin layer, i.e., base paper, coated with resin. In the present invention can be used as a basis, containing base paper and the resin layer. In this case, the resin layer can be provided only on one surface of base paper or a resin can be provided on both surfaces of the paper base.

[0018] the base Paper is obtained using wood pulp as a main material and with the use of synthetic pulp such as polypropylene or synthetic fiber such as nylon or polyester, in addition to wood mass, if necessary, to create the paper. Examples of wood pulp include bleached Kraft pulp from wood of deciduous trees (LBKP), bleached sulphite pulp from wood of deciduous trees (LBSP), bleached Kraft pulp from wood of coniferous trees (NBKP), bleached sulphite pulp from wood of coniferous trees (NBSP), soluble cellulose from wood of deciduous trees (LDP), soluble cellulose from wood of coniferous d is the trees (NDP), unbleached Kraft pulp from wood of deciduous trees (LUKP) and unbleached Kraft pulp from wood of coniferous trees (NUKP). They can be used separately or in combination of two or more. Among these various types of wood pulp respectively use LBKP, NBSP, LBSP, NDP and LDP, which have a high content of the component with short fibers. Cellulose may be a chemical pulp (sulfate pulp or sulfite pulp), which has a low content of impurities. You can also use the pulp is subjected to a bleaching treatment to improve the degree of whiteness. A sizing agent, a white pigment, reinforcing paper tool, a fluorescent bleaching agent, water retention agent, dispersant, emollient, etc. can be respectively added to the base paper.

[0019] In the present invention the density of the paper base paper, a precisely defined in JIS P 8118, is preferably 0.6 g/m3or more and 1.2 g/m3or less. In addition, paper weight, more preferably 0.7 g/m3or more and 1.2 g/m3or less.

[0020] In the present invention, when the base includes a resin layer thickness of the resin is preferably 50 μm or more and 60 μm or less. In the present invention, the thickness of the resin layer is calculated in the following way. First, a cross-section of the media is cut using microtome and cross section observed using a scanning electron microscope. Then measure the thickness of the resin layer in an arbitrary 100 points or more and their average is defined as the thickness of the layer of resin. The thickness of the other layers in the present invention is also calculated by the same method.

[0021] the Resin used in the resin may be a thermoplastic resin. Examples of thermoplastic resins include acrylic resin, acrylic silicone resin, polyolefin resin and a styrene-butadiene copolymers. Among these resins, respectively, using the polyolefin resin. In the present invention, the term "polyolefin resin" refers to a polymer obtained by using an olefin as a monomer. Specific examples include homopolymers of ethylene, propylene, isobutylene or the like, and their copolymers. These polyolefin resins may be used singly or in combination of two or more resins, if necessary. Among these polyolefin resins, respectively, using polyethylene as polyethylene, respectively, using low density polyethylene (LDPE) and high density polyethylene (HDPE). The resin layer may contain a white pigment, a fluorescent bleaching agent ultramarine, etc. in order to adjust the opacity, whiteness, tint and so on, Among them a white pigment, respectively, contained, because the opacity can be improved. Examples of the white pigment include titanium dioxide rutile and titanium dioxide anatase.

<ink Receiving layer>

[0022] In the present invention, the ink receiving layer can be provided only on one surface or on both surfaces of the base. The thickness of the ink receiving layer is preferably 18 μm or more and 60 μm or less. In the present invention, the ink receiving layer may be a single layer or multiple layers of two or more layers. Below in the description of one of the at least one ink receiving layer is designated as "the first ink receiving layer. For example, when the ink receiving layer is a single layer, a single ink receiving layer performs the function of the first ink receiving layer. When the ink receiving layer consists of multiple layers, one of many ink receiving layer performs the function of the first ink receiving layer.

[0023] In the present invention, the amount of dry coating ink receiving layer is preferably 18.0 g/m2or more and 55.0 g/m2or less, and more preferred is equipment 18.0 g/m 2or more and 50.0 g/m2or less. Herein, when the ink receiving layer consists of multiple layers, the term "amount of dry coating ink receiving layer" refers to the total number of dry coating layers. Materials that can be incorporated in the ink receiving layer will be described below.

(The first ink receiving layer)

[0024] In the present invention, the thickness of the first ink receiving layer is preferably 18 μm or more and 50 μm or less.

(1) Inorganic particles

[0025] In the present invention, the first ink receiving layer contains inorganic particles having an average primary particle size of 1 μm or less (hereinafter referred to herein simply referred to as "inorganic particles"). The average primary particle size of inorganic particles is preferably 0.1 nm or more and 500 nm or less, more preferably 1 nm or more and 300 nm or less and, particularly preferably 5 nm or more and 250 nm or less. In the present invention, the average primary particle size of inorganic particles is srednetsenovoj particle size for diameters of circles having the area equal to the estimated area of the primary particles, inorganic particles, when inorganic justiciable using an electron microscope. In this case, the measurement is conducted at least 100 points.

[0026] In the present invention, the inorganic particles can be used in covering the liquid ink receiving layer in a state in which inorganic particles are dispersed using a dispersant chemical. The average secondary particle size of inorganic particles in dispergirovannom condition is preferably 0.1 nm or more and 500 nm or less, more preferably 1.0 nm or more and 300 nm or less and, particularly preferably 10 nm or more and 250 nm or less. The average secondary particle size of inorganic particles in dispergirovannom condition can be measured by the method of dynamic light scattering.

[0027] In the present invention, the content (% by weight) of inorganic particles in the ink receiving layer is preferably 30 mass% or more and 95 mass% or less.

[0028] examples of the inorganic particles used in the present invention include hydrated aluminum oxide, aluminum oxide, silicon dioxide, colloidal silicon dioxide, titanium dioxide, zeolite, kaolin, talc, hydrotalcite, zinc oxide, zinc hydroxide, aluminum silicate, calcium silicate, magnesium silicate, zirconium oxide and zirconium hydroxide. These inorganic particles can be used singly or in combination of two or more near hanicheskih particles, if necessary. Among the above inorganic particles, respectively, using the hydrated oxide of aluminum, aluminum oxide and silicon dioxide, they can form a porous structure having a high absorption property of the ink.

[0029] Examples of the aluminum oxide used in the ink receiving layer include γ-alumina, α-alumina, δ-alumina, θ-alumina and χ-alumina. Among them, from the point of view of the optical image density and absorption properties of the ink, respectively, using γ-alumina. A specific example of γ-alumina is a AEROXIDE Alu C (production company EVONIK Industries).

[0030] the Hydrated aluminum oxide represented by the General formula (X)can accordingly be used in the ink receiving layer:

Al2O3-n(OH)2n·mH2OGeneral formula (X)

(where n represents 0, 1, 2 or 3, m is 0 or more and 10 or less, preferably 0 or more and 5 or less, however, m and n are not simultaneously equal to zero.) It should be noted that m may not be an integer, since mH2O is often removed aqueous phase, which is not associated with the formation of the crystal lattice. Vdab the wok, m can reach zero when heated hydrated oxide of aluminum.

[0031] In the present invention the hydrated alumina can be obtained in a known manner. In particular, its examples include a method in which the hydrolyzing aluminum alkoxide, the way in which the hydrolyzing sodium aluminate, and the way in which the aqueous sodium aluminate solution is neutralized by adding thereto an aqueous solution of aluminum sulfate or aluminum chloride.

[0032] the Known crystal structure of hydrated aluminum oxide include amorphous gibbsite and vomit in accordance with the temperature of heat treatment. The crystal structure of hydrated aluminum oxide can be analyzed by x-ray diffractometry. In the present invention, inter alia, respectively, using the hydrated oxide of aluminum, having a structure of Bonita, or amorphous hydrated oxide of aluminum. Its specific examples include hydrated aluminum oxide, as described, for example, in Japanese laid patent No. 7-232473, 8-132731, 9-66664 and 9-76628. Examples of commercially available hydrated aluminum oxide include DISPERAL HP14 and HP18 (manufactured by Sasol). If necessary, they can be used separately or in combination of two or more.

[0033] In the present invention hydrater the bath alumina has a specific surface area is preferably 100 m 2/g or more and 200 m2/g or less and more preferably 125 m2/g or more and 175 m2/g or less, the specific surface area determined by way BET. Way BET is a way in which a molecule or ion with a known size, allow to adsorb onto the surface of the sample and the specific surface area of the sample is measured based on the number of adsorption. In the present invention, nitrogen gas is used as gas, which allow you to be adsorbed on the sample.

[0034] the Hydrated aluminum oxide and the aluminum oxide used in the present invention, can be mixed with the overlying liquid ink receiving layer in the form of aqueous dispersions. Acid can be used as dispersant chemical. In relation acid, sulfonic acid represented by the General formula (Y), respectively, are used because you can get the effect of deterring the spreading of the image:

R-SO3HThe General formula (Y)

(where R represents a hydrogen atom, alkyl group having from 1 to 3 carbon atoms, or alkenylphenol group having from 1 to 3 carbon atoms, and R can be replaced by exography, a halogen atom, alkoxygroup or illinoisrope).

[0035] the silica used in the ink receiving layer, roughly divided into two types of silicon dioxide, namely silica obtained by a wet process, and silica produced by a dry process (the process in the gas phase), from the point of view of its production processes. Known wet process is a method in which the active silicon dioxide receive by acid cleavage of silicate, active silica accordingly polimerizuet to condense and precipitate the polymerized product to get hydrated silicon dioxide. Examples of known dry process (the process in the gas phase) include a method of obtaining anhydrous silicon dioxide by method (hydrolysis in the flame), in which the halide hydrolyzing silicon in the gas phase at high temperature, or a method (arc process), in which quartz sand and coke are heated, restore and is gasified by means of an arc in an electric furnace, and the resulting gas is oxidized by air. In the present invention can be used silica obtained by a dry process (the process in the gas phase) (hereinafter referred to in this document also referred to as "silicon dioxide process in the gas phase"). The reason for this is as follows. Silicon dioxide is the process in the gas phase has a particularly large specific surface area and, thus, it has a particularly high absorption property of the ink. In addition, silicon dioxide process in the gas phase has a low refractive index and, thus, can give the transparency of the ink receiving layer, thereby obtaining good ability to show color. Specific examples of the silicon dioxide of the process in the gas phase include AEROSIL (manufactured by Nippon Aerosil Co., Ltd.) and of Reolosil QS series (production company TOKUYAMA Corporation).

[0036] In the present invention, the specific surface area of the silicon dioxide of the process in the gas phase, measured way BET, is preferably 50 m2/g or more and 400 m2/g or less and more preferably 200 m2/g or more and 350 m2/g or less.

[0037] In the present invention the hydrated oxide of aluminum, aluminum oxide and silicon dioxide can be used as a mixture. In particular, at least two selected from hydrated aluminum oxide, aluminum oxide and silicon dioxide can be mixed in powder form and is atomized in order to obtain a liquid dispersion.

(2) Inorganic particles coated with a metal oxide

[0038] In the present invention, the first ink receiving layer contains inorganic particles coated with a metal oxide and having an average primary particle size of 15.0 μm or more. P is a means of embedding inorganic particles, covered with a metal oxide and having such a large particle size, pearl luster can be given to the media.

[0039] In the present invention in relation to inorganic particles coated with the metal oxide, it is sufficient that the portion of the surfaces of inorganic particles was covered with a metal oxide. However, the coverage ratio of the metal oxide (the surface area of the inorganic particles coated with a metal oxide/total surface area of the inorganic particles) is preferably 95% or more and more preferably 100%, i.e. the surface of the inorganic particles is more appropriate is completely covered with the metal oxide.

[0040] the mass Ratio of metal oxide to the total weight of the inorganic particles coated with a metal oxide, preferably is 5.0 mass% or more and 80.0% of mass or less and more preferably 10.0 percent by mass or more and 70.0% by mass or less.

[0041] In the present invention, the content of inorganic particles coated with a metal oxide, inorganic particles must be contained in the first ink receiving layer preferably amounts to 4.6% by mass or more and 37.9% by mass or less and more preferably of 5.0 mass% or more and 25.0% by mass or less on the content of the inorganic particles. Controlling the content of the above suitable range, the origin is leave an extra boost of pearl lustre media, as well as improving the properties of the ink absorption of the recording media.

[0042] the Average primary particle size of inorganic particles coated with a metal oxide, is of 15.0 μm or more. The average primary particle size of inorganic particles coated with the metal oxide preferably is 300 μm or less, more preferably 250 μm or less, particularly preferably 50 μm or less. In the present invention, the average primary particle size of inorganic particles coated with a metal oxide, is srednetsenovoj particle size for diameters of circles having the area equal to the estimated area of the primary particles when the particles are observed using an optical microscope. In this case, the measurement is conducted at least 100 points.

[0043] Each inorganic particle is covered with the metal oxide may have a plate shape. In the present invention, the term "plate form" means that the ratio of the average size of the primary particles to the average thickness of the particles, described below, is 5 or more. In the present invention, when the inorganic particles coated with a metal oxide, have a plate shape, the average thickness of the particles for particles preferably is 1.0 μm or less. In the present invention, the average thickness of the particles of the inorganic particles coated on the sid metal, determined by selecting a random 100 inorganic particles in the observation using an electron microscope and evaluation srednecenovom thickness 100 inorganic particles.

[0044] In the present invention, the content of inorganic particles coated with a metal oxide, inorganic particles will be contained in the ink receiving layer is preferably 1.0 g/m2or more and 8.0 g/m2or less and more preferably 2.0 g/m2or more and 5.0 g/m2or less. Controlling the content in the above range, pearl luster can be obtained more efficiently. In addition, when the content of inorganic particles coated with a metal oxide, inorganic particles will be contained in the ink receiving layer is 8.0 g/m2or less, the spreading of the image in the environment with high humidity can be effectively restrained.

[0045] examples of the inorganic particles used in the inorganic particles coated with a metal oxide consist of natural mica, synthetic mica, aluminum oxide, hydrated aluminum oxide and silicon dioxide. Among them, natural mica and synthetic mica are appropriate. Examples of the metal oxide include titanium dioxide, iron oxide and tin oxide. Among them, titanium dioxide is appropriate. In particular, the respectively specific use mica, coated with titanium dioxide.

(3) the Binder

[0046] In the present invention, the first ink receiving layer may further contain a binder. In the present invention, the term "binder" refers to a material that can bind inorganic particles to form a covering film.

[0047] In the present invention, from the viewpoint of the properties of absorption of the ink, the content of the binders in the ink receiving layer preferably is 3.0% by mass or more and 30.0% by mass or less and more preferably of 5.0 mass% or more and 25.0% by mass or less on the content of the inorganic particles.

[0048] Examples of binders include starch derivatives such as oxidized starch, esterified starch and esterified phosphoric acid starch; cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose; casein, gelatin, soybean protein, polyvinyl alcohol and derivatives thereof; polyvinyl pyrrolidone; resin of maleic anhydride; latexes of conjugated polymers, such as copolymers of styrene-butadiene and copolymers of methyl methacrylate-butadiene; latexes of acrylic polymers such as polymers of ester of acrylic acid and a complex ester of methacrylic acid; latexes of vinyl is o polymers, such as copolymers of ethylene vinyl acetate; latexes of polymers modified with functional groups, obtained by modifying the above-described polymers with a monomer having a functional group such as carboxyl group; carinsurance polymers obtained by cationization described above polymers cationic group; carinsurance polymers obtained by cationically surface of the above-described polymers, cationic surface-active agent; polymers on surfaces which are distributed polyvinyl alcohol, polymers get through polymerization of a monomer constituting any of the above polymers, in the presence of cationic polyvinyl alcohol; polymers on surfaces which are distributed cationic colloidal particles, polymers get by polymerization of a monomer constituting any of the above polymers suspended in a dispersion of cationic colloidal particles; aqueous binders such as thermotherapies synthetic resin, such as melamine resin and urea resin; polymers and copolymers of esters of acrylic acid and esters of methacrylic acid such as polymethyl methacrylate; and synthetic resins such as polyurethane resin, unsaturated poly is Fernie resin, copolymers of vinyl chloride and vinyl acetate, polyvinyl butyral, alkyd resins. These binders can be used singly or in combination of two or more binders, if necessary.

[0049] Among the above binders, respectively, using polyvinyl alcohol and derivatives of polyvinyl alcohol. Examples of derivatives of polyvinyl alcohol include a modified cation polyvinyl alcohol modified with anion polyvinyl alcohol, modified silanol polyvinyl alcohol and polyvinylacetal.

[0050] the Polyvinyl alcohol can be synthesized, for example, by saponification of polyvinyl acetate. The degree of saponification of polyvinyl alcohol is preferably 80% by mole or more and 100% by mol or less and more preferably 85% by mole or more and 100% by mol or less. It should be noted that the degree of saponification is the ratio of the number of moles of the hydroxyl group formed by the reaction of saponification, when polyvinyl alcohol is prepared by saponification of polyvinyl acetate. In the present invention using a value measured in accordance with the method described in JIS-K6726. The average degree of polymerization of polyvinyl alcohol is preferably 1500 or more and 5000 or less, and more preferably 2000 or more and II less. In the present invention as the average polymerization degree is used srednevozrastnoe degree of polymerization, determined in accordance with the method described in JIS-K6726.

[0051] Upon receipt covering liquid ink receiving layer of polyvinyl alcohol or a derivative of polyvinyl alcohol can be used in the form of an aqueous solution. In this case, the solids content for polyvinyl alcohol or a derivative of polyvinyl alcohol in aqueous solution is preferably 3% by mass or more and 20 mass% or less.

(4) a Crosslinking agent

[0052] In the present invention, the first ink receiving layer may further contain a crosslinking agent. By incorporating a crosslinking means you can reduce the disturbance of orientation of the inorganic particles coated with a metal oxide. In particular, when a crosslinking agent is not contained, there is the movement of moisture in the ink receiving layer during drying and may cause disorientation inorganic particles coated with a metal oxide. In contrast, when contains a crosslinking agent increases the viscosity and, thus, it is possible to ease the movement of moisture in the ink receiving layer during drying. Thus, the orientation of the inorganic particles coated with a metal oxide, narushi the ü difficult.

[0053] Examples of the method of embedding a crosslinking means inside the first ink receiving layer include a method in which a crosslinking agent is inserted into the covering liquid ink receiving layer, and a method in which a layer containing a crosslinking agent (hereinafter referred to in this document also referred to as "primer"), is formed between the ink receiving layer and the base in order to get to diffuse and penetrate a crosslinking agent in the covering liquid ink receiving layer applied on the primer layer. When using the first method, the content of cross-linking means in the ink receiving layer is preferably 40% by mass or more and 60 mass% or less and more preferably 40 mass% or more and 50 mass% or less with respect to the contents binders. When using the latter method, the content of cross-linking means in the ink receiving layer is preferably 1% by mass or more and 60 mass% or less and more preferably 5% by mass or more and 50 mass% or less with respect to the contents binders. In the present invention, the latter method is more appropriate.

[0054] Examples of a crosslinking tools include compounds aldehydes, compounds of melamine, isocyanate compounds, zirconium compounds, connect the various amides, aluminum compounds, boric acid and borates. These cross-linking means can be used separately or in combination of two or more compounds, if necessary. In particular, when using polyvinyl alcohol or a derivative of polyvinyl alcohol as a binder means, among the above-described cross-linking means, respectively, use boric acid or borate.

[0055] examples of the boric acids include orthoboric acid (H3BO3), metaboric acid and Gibernau acid. These borates can be a water-soluble salt of any of the above boric acid. Their examples include salts of boric acid and alkali metals such as sodium salt of boric acid and potassium salt of boric acid; salts of alkaline earth metals and boric acid, such as a magnesium salt of boric acid and calcium salt of boric acid; and ammonium salts of boric acid. Accordingly, among them use of orthoboric acid from the viewpoint of the stability of the covering liquid over time and the effect of suppressing the formation of cracks.

(5) Other additives

[0056] In the present invention, the first ink receiving layer may contain additives other than the components described above. Specific examples of the additives include a pH adjustment agent, a thickener, which improves the fluidity of the medium, PR is thiosinamine means, the foaming inhibitor, surfactant, lubricant for forms, penetrating agent, color pigment, color dye, fluorescent whitening agent, an ultraviolet absorber rays, antioxidant, antiseptic, antifungal agent, water repellent agent, dye fixing agent, a hardener and weatherproof material.

(The second ink receiving layer)

[0057] In the present invention, when the ink receiving layer consists of multiple layers, the second ink receiving layer optionally provided on the first ink receiving layer. The second ink receiving layer preferably has a thickness of 18 μm or more and 55 μm or less.

[0058] In the present invention, the second ink receiving layer may contain inorganic particles having an average primary particle size of 1 μm or less, and the binder. Examples of inorganic particles and binders are described for the first ink receiving layer, can be used as inorganic particles and binders in the second ink receiving layer. Inorganic particles and the binder in the second ink receiving layer can be a similar to those in the first ink receiving layer or from the ranks of them.

[0059] the Second ink receiving layer may contain inorganic particles coated with a metal oxide. The content of inorganic particles coated with a metal oxide, preferably is 3.0% by mass or less and more preferably 2.0 percent by mass or less with respect to the content of inorganic particles in the second ink receiving layer. In addition, preferably, the second ink receiving layer contains inorganic particles coated with a metal oxide.

<a Primer layer>

[0060] As described above, in the present invention, a primer layer containing a crosslinking agent, it is possible to provide between the ink receiving layer and the base.

[0061] a Crosslinking agent contained in the primer layer, may be similarly cross-linking means is shown as an example of material that can be contained in the ink receiving layer. However, to use a more suitable drill. Borax has a very high crosslinking reactivity in relation to the connecting means. Thus, if a drill is inserted into the covering liquid ink receiving layer, the crosslinking reaction can be completed prior to coating. Therefore, borax is not suitable for use in the ink receiving layer. In contrast, when a drill is inserted into the primer, the reaction sshi the project starts at the moment when covering the liquid ink receiving layer is applied on the primer layer. Therefore, borax can be used as cross-linking means. From the point of view of high crosslinking reactivity borax, borax is preferably used since it can quickly cause a crosslinking reaction in comparison with other cross-linking means, shown as an example above. When covering the liquid ink receiving layer is applied on the primer layer containing borax, in a time when borax diffuses and penetrates into the covering liquid is in contact with a bonding tool, the drill quickly initiates the crosslinking reaction and can increase the viscosity of the covering liquid. As a result, it is possible to restrain a phenomenon that occurs disorientation inorganic particles coated with a metal oxide, by moving moisture during the drying of the covering liquid. Thus, you can easily get the information carrier, which satisfies the above described conditions values FLOP.

[0062] Borax and a crosslinking agent, the above example can be used in combination. In this case, the content of cross-linking means, other than the Boers, in relation to the content of borax preferably is 1.0% by mass or more and 50.0 mass% or less andmore preferably of 5.0 mass% or more and 40.0% by mass or less.

[0063] When the primer layer contains borax as a cross-linking means, the content of borax is preferably 0.1 g/m2or more and 1.2 g/m2or less and more preferably 0.1 g/m2or more and 1.0 g/m2or less when calculated on the amount of dry coating.

[0064] As described above, borax can be subjected to a crosslinking reaction with a linking agent. In particular, the drill has a high reactivity in respect of polyvinyl alcohol and derivatives of polyvinyl alcohol. Therefore, the total content of polyvinyl alcohol and derivatives of polyvinyl alcohol in the primer layer is preferably 0.1% by mass or less and more preferably 0.01 percent by mass or less with respect to the content of borax. In addition, preferably, the primer layer contains polyvinyl alcohol or derivatives of polyvinyl alcohol.

[0065] the Primer layer may further comprise other additives, are given as examples of materials that can be used in the ink receiving layer.

<Back coating layer>

[0066] In the present invention, the back coating layer can be provided on the substrate surface, the surface opposite the surface having yourself ink receiving layer. The back coating layer may contain a white pigment, the connection is completed with the tool and so on The thickness of the back coating layer is preferably 0.1 μm or more and 10 μm or less.

The method of receiving media

[0067] In the present invention is a method of obtaining the information carrier is not specifically limited. However, the method of receiving media may include a step for covering the liquid ink receiving layer and the stage of applying the covering liquid ink receiving layer on the base. The method of receiving media are described below.

<a Method of obtaining basics>

[0068] In the present invention generally used a method of producing paper can be used as a way to obtain base paper. Examples of paper-making machines include dlinnoyu paper machine, cylinder machine, drum machine and a twin wire machine. In order to increase the surface smoothness of the base paper, the surface treatment can be performed by applying heat and pressure during or after the manufacturing process of paper. Specific examples of the method of surface treatment include processing a calender such as a machine calendering and supercalendering.

[0069] Examples of a method of providing a layer of resin on the paper-based, i.e., the method of coating the base paper with the use of resins include the way of extras is Ziya melt, the wet lamination method and a dry laminating method. Among these methods, preferred method of melt extrusion, in which the molten resin ekstragiruyut on a surface or both surfaces of base paper to be coated on the base paper using a resin. An example of a widely used method is a method (also referred to as "extrusion coating method, including casting resin extruded from the extrusion of the matrix in contact with the paper-based, which moved into the pinch point between the clamping shaft and the cooling roller, and the adhesion of the resin and the base paper by pressing the jamming to be laminated to the base paper layer of resin. When forming the resin layer by the method of melt extrusion pre-processing can be performed so that the base paper and the resin layer is more firmly stuck to each other. Examples of pre-treatment include treatment with acid etching, using a mixture of sulfuric acid and chromic acid, the processing of the flame with the gas flame, the treatment with ultraviolet radiation, the treatment by corona discharge, the treatment smoldering charge and handling adhesive coating using alkylsilane or the like. Among these preliminary obrabotka is appropriate is the treatment by corona discharge.

[0070] when forming the primer layer and the back coating layer covering the liquid primer layer and covering the liquid back coating layer can be obtained pre-and these fluids can be applied on the canvas.

<a Method for forming the ink receiving layer>

[0071] In the information carrier according to one of embodiments of the present invention, for example, the following methods can be used as the method of forming the ink receiving layer on the base. First get the covering liquid ink receiving layer. Then the covering liquid is applied to the substrate and dried to obtain the information carrier according to one of embodiments of the present invention. In the method of applying a covering liquid can be used, for example, a device for coating a watering device for coating with an extrusion system or device for coating irrigation system moving store. Covering the liquid can be heated during the coating process. Examples of the method of drying after coating include methods using hot air dryers, such as the linear tunnel dryer, arc dryer, dryer air path or sinusoidal dryer air cushion; sposoby using the dryer, in which use infrared rays, heat, microwaves, or the like.

[0072] In particular, the information carrier, which meets the above conditions values FLOP, you can easily get by using a process comprising a stage of forming a primer layer containing borax based on the stage of applying the covering liquid ink receiving layer on the primer layer and the stage of drying the covering liquid ink receiving layer.

EXAMPLES

[0073] the Present invention is described in more detail by way of examples and comparative examples. The present invention is not limited to the following examples, provided that does not go beyond the essence of the present invention. It should be noted that the term "part" in the description of the following examples are based on weight unless otherwise specified.

Getting media

<Obtaining basics>

[0074] Mixed eighty parts of LBKP having a degree of grinding of 450 ml in units of Canadian Standard Freeness (CSF), 20 parts of NBKP having a degree of grinding 480 ml in units of Canadian Standard Freeness (CSF), 0,60 part cationizing starch, 10 parts of heavy calcium carbonate, 15 parts of light calcium carbonate, 0,10 parts of the dimer of alkylbetaine and 0,030 part of cationic polyacrylamide. In the resulting mixture was added water so that the mixture had the content tenagophila to 3.0% by weight, thus gaining material for paper. Subsequently, the material for the paper was subjected to obtaining paper using clinocerinae paper machine, which was carried out by three-stage wet-pressing, followed by drying using a multi-cylinder dryer. Then get the paper was impregnable aqueous solution of oxidized starch using a size press device in order to have a solid content of 1.0 g/m2after drying, and then dried. In addition, the paper was subjected to machine calendering to obtain a base paper, which has the bulk of 110 g/m2the degree of Stockigt sizing 100 seconds, the permeability of 50 seconds, the smoothness on bekku 30 seconds, stiffness in gerli of 11.0 mn and a thickness of 120 μm. Then, the resin composition containing 70 parts of low density polyethylene, 20 parts of high density polyethylene and 10 parts of titanium oxide, was applied to the surface of the base paper so that the amount of dry coating was 25 g/m2. This surface is designated as the main surface of the base. In addition, the resin composition containing 50 parts of low density polyethylene and 50 parts of high density polyethylene, was applied on the other surface of the base paper, thereby obtaining the base.

<Obtaining pokrivawe the liquid primer>

[0075] the Covering liquid primer layer was obtained by dissolving borax in ion-exchange water so that the borax content was 5% by mass.

<Obtaining covering liquid ink receiving layer>

(Obtaining a colloidal Sol A)

[0076] the Hydrated oxide of aluminum DISPERAL HP14 (manufactured by Sasol) was added to ion exchange water so that the solids content of hydrated aluminum oxide was 25% by weight. Then there was added 1.4 parts methanesulfonic acid to 100 parts of the solids content of hydrated aluminum oxide and stirred the resulting mixture. In addition, ion-exchange water was added so that the solids content of hydrated aluminum oxide was 21% by weight. Thus, received a colloidal Sol A.

(Obtaining a colloidal Sol B)

[0077] Iriodin 100 (manufactured by Merck KGaA), which is a mica coated with titanium dioxide were added to ion exchange water so that the solid content was 25% by mass in order to obtain a colloidal Sol B. Iriodin 100 has a plate form, average primary particle size of 22 μm and the mass ratio of titanium dioxide to the total mass of mica covered with titanium dioxide, is 29,0% by weight. The average thickness of the mica particles in colloidal ash B, clydeport titanium dioxide, was 0.5 μm.

(Receipt covering the fluid of the first ink receiving layer)

[0078] the Colloidal Sol and A colloidal Sol, obtained above, appropriately mixed to obtain a mixture of colloidal sols so that the relationship of the content of hydrated aluminum oxide to the content of mica covered with titanium dioxide (hydrated aluminium oxide:mica covered with titanium dioxide), represented the values shown in table 1. Then the mixture of colloidal sols, an aqueous solution of polyvinyl alcohol (aqueous solution of PVA 235 (production company Kuraray Co., Ltd.), having a degree of polymerization of 3500 and a degree of saponification of 88% by mol, an aqueous solution having a solids content of 8% by weight)and an aqueous solution of boric acid (having a solids content of 3% by weight) were mixed so that the relationship of solids (hydrated aluminium oxide:polyvinyl alcohol:mica covered with titanium dioxide:boric acid) represented the values shown in table 1. Therefore, there has been covering the fluid of the first ink receiving layer.

Table 1
Conditions for obtaining a covering liquid of the first ink receiving layer
(unit: parts by mass)
Covering the liquid ink receiving layer No.Hydrated aluminum oxide:PVA:mica coated with TiO2:boric acid
Hydrated oxide of aluminumPVAMica coated with TiO2Boric acid
Covering the liquid ink receiving layer No. 1100,0013,0013,900,75
Covering the liquid ink receiving layer No. 2100,0013,004,600,75
Covering the liquid ink receiving layer No. 3100,0013,009,200,75
Covering the liquid ink receiving layer No. 4100,0013,0018,500,75
Covering the liquid ink receiving layer No. 5100,0013,00 23,100,75
Covering the liquid ink receiving layer No. 6100,0013,0037,900,75
Covering the liquid ink receiving layer No. 7100,0013,0023,100,75

Covering the liquid ink receiving layer No. 8100,0013,0017,300,75
Covering the liquid ink receiving layer No. 9100,0013,0011,500,75
Covering the liquid ink receiving layer No. 10100,0013,009,900,75
Covering the liquid ink receiving layer No. 11100,0013,008,700,75
Covering the liquid ink receiving layer No. 12100,0013,0013,90of 5.40
Covering the liquid ink receiving layer No. 13100,0013,0013,900,75
Covering the liquid ink receiving layer No. 14100,0013,0013,902,60
Covering the liquid ink receiving layer No. 15100,0013,0000,75
Covering the liquid ink receiving layer No. 1608,0010,002,00

(Receipt covering the fluid of the second ink receiving layer)

[0079] the Colloidal Sol and A water solution of polyvinyl alcohol obtained above were mixed so that the solid content of polyvinyl alcohol was 7 parts per 100 parts of the solids content is gidratirovannogo of aluminum oxide. Subsequently, an aqueous solution of boric acid (having a solids content of 3% by weight) was added to the mixture so that the solid content of boric acid was 16.4 parts per 100 parts of the solids content of polyvinyl alcohol. Therefore, there has been covering the liquid of the second ink receiving layer.

<Obtaining media information>

(Receiving media from 1 to 25)

[0080] the Covering liquid primer layer obtained above was applied onto the main surface of the base obtained above, using engraving device for coating so that the dry coverage (g/m2) represented each of the values shown in table 2 and dried for forming the primer layer. Then cover the liquid of the first ink receiving layer obtained above (temperature covering liquid: 40°C)was applied on the primer layer using a moving matrix so that the amount of dry coating (g/m2) represented each of the values shown in table 2, and was dried with hot air at 150°C. the Thus formed storage media having a first ink receiving layer. Media having the first ink receiving layer and the second ink receiving layer, obtained via NAS is the basis of covering the fluid of the first ink receiving layer and covering the liquid of the second ink receiving layer (temperature each covering liquid: 40°C) using the method of simultaneous application of multilayer coatings using the moving matrix so that the number of dry coating was represented by the values shown in table 2, and dried to cover the liquid with hot air at 150°C. the Thickness of the first ink receiving layer of each of the storage media from 1 to 21 was 18 μm or more and 50 μm or less.

Table 2
Conditions of the coating media
Media No.PrimerThe first ink receiving layerThe second ink receiving layer
The amount of coating (g/m2)Covering the liquid ink receiving layer No.The amount of coating (g/m2)The amount of coating (g/m2)
Media 10,1Covering the liquid ink receiving layer 128,0-
The information carrier 20,3P is Krivaya liquid ink receiving layer 1 28,0-
Media 30,5Covering the liquid ink receiving layer 128,0-
Media 40,7Covering the liquid ink receiving layer 128,0-
Media 51,0Covering the liquid ink receiving layer 128,0-
Media 61,2Covering the liquid ink receiving layer 128,0-
Media 70,5Covering the liquid ink receiving layer 226,0-
Media 80,5Covering the liquid ink receiving layer 3 27,0-
The information carrier 90,5Covering the liquid ink receiving layer 429,0-
Media 100,5Covering the liquid ink receiving layer 530,0-
Media 110,5Covering the liquid ink receiving layer 632,0-
Media 120,5Covering the liquid ink receiving layer 718,0-
Media 130,5Covering the liquid ink receiving layer 823,0-
The storage medium 140,5Covering the liquid ink receiving layer 933,0 -
The storage medium 150,5Covering the liquid ink receiving layer 1038,0-
The storage medium 160,5Covering the liquid ink receiving layer 1143,0-
The information carrier 170,5Covering the liquid ink receiving layer 128,05,0
The storage medium 180,5Covering the liquid ink receiving layer 128,010,0
Media 190,5Covering the liquid ink receiving layer 128,015,0
Media information 200,5Covering the liquid ink receiving layer 128,020,0
Media 21-Covering the liquid ink receiving layer 1228,0-
The storage medium 22-Covering the liquid ink receiving layer 1328,0-
Media 23-Covering the liquid ink receiving layer 1428,0-
Media 240,5Covering the liquid ink receiving layer 1525,0-
Media 25-Covering the liquid ink receiving layer 162,025,0

(Getting media 26)

[0081] the storage Medium 26 was received as information carrier 3, except that borax in covering liquid primer was replaced with orthoboric acid.

(Receive what their media 27)

[0082] the storage Medium 27 received as information carrier 3, except that boric acid in covering the fluid of the first ink receiving layer 1 was replaced by borax.

Assessment

<Measurement values FLOP media>

[0083] the Values FLOPMaxand FLOPMinmedia with 1 to 27, obtained above, was measured by the method described above to calculate the value of a FLOPMin/FLOPMax. The results are shown in table 3. When measurement cannot be performed, for example, because the surface of the media significantly roughened, the results were marked as "No".

<Evaluation of spreading the image in the environment with high humidity>

[0084] Among the media from 1 to 27, on the media, values FLOP which could be measured, a solid image of cyan, Magenta and yellow (register load: 100%) was recorded using an inkjet recording device PIXUS MP990 (produced by CANON KABUSHIKI KAISHA), containing the ink cartridge BCI-321 (produced by CANON KABUSHIKI KAISHA). Registration was performed under conditions of temperature 23°C and 50%relative humidity. The resulting images were stored in conditions of high humidity at 90% relative humidity at 30°C for one week and then evaluated is whether the spreading of each of the images by visual observation. Used the following evaluation criteria. The evaluation results are shown in table 3. In the evaluation criteria, described below, from AA to b defined as acceptable levels and was identified as an unacceptable level. In the above inkjet recording device, the image register, provided that one drop of ink having a weight of approximately 11 ng, provides a single area of 1/600 inch × 1/600 inch at a resolution of 600 dpi × 600 dpi, defined as registering 100%load. AA: the spreading does not occur on all color images. A: slightly spreading occurs on some color images. B: despite the fact that spreading occurs on some color images, spreading occurred at such a level that it did not cause problems. C: Flowing significantly occurred on any of the color images.

Table 3
The evaluation results
Example No.Media No.Is FLOPAssessment of bleeding images in the environment with high humidity
FLOPMaxFLOPMin FLOPMin/
FLOPMax
Example 1Media 1as 4.023,820,95A
Example 2The information carrier 24,174,171,00A
Example 3Media 34,174,171,00A
Example 4Media 44,174,171,00A
Example 5Media 54,174,171,00A
Example 6Media 64,174,171,00In
Example 7 Media 72,522,521,00A
Example 8Media 83,233,231,00A
Example 9The information carrier 95,485,481,00A
Example 10Media 105,905,901,00A
Example 11Media 116,416,411,00In
Example 12Media 124,174,171,00A
Example 13Media 13 4,174,171,00A
Example 14The storage medium 144,174,171,00A
Example 15The storage medium 154,174,171,00A
Example 16The storage medium 164,174,171,00A
Example 17The information carrier 174,174,171,00AA
Example 18The storage medium 184,124,121,00AA
Example 19Media 194,124,121,00/td> AA
Example 20Media information 204,054,051,00AA
Example 21Media 213,452,930,85In
Comparative example 1The storage medium 22NoNo--
Comparative example 2Media 233,712,600,70A
Comparative example 3Media 240,110,111,00A
Comparative example 4Media 251,961,760,90 A
Comparative example 5Media 26NoNo--
Comparative example 6Media 27NoNo--

[0085] Although the present invention is described with reference to exemplary embodiments of the implementation, it should be understood that the invention is not limited to the disclosed exemplary embodiments of the implementation. The volume of the following claims must be in accordance with the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

1. The storage media that contains:
basis; and
at least one ink receiving layer,
where the first ink receiving layer, which represents the at least one ink receiving layer contains inorganic particles have an average primary particle size of 1 μm or less, and the inorganic particles coated with a metal oxide,
inorganic particles coated with the metal oxide have an average primary particle size of 15.0 μm, and the and more and
when the maximum value FLOP media, presents the formula given below, indicate FLOPMaxand the minimum value of the FLOP denote FLOPMin, FLOPMinis 2.5 or more and is FLOPMin/FLOPMaxis over 0.80 or more and 1.00 or less:
is FLOP=2,69×(L*15°-L*100°C)1,11/L*45°0,86
where L*15°indicates the brightness of reflected light at an angle offset 15°, L*45°indicates the brightness of reflected light at an angle offset 45° and L*110°indicates the brightness of reflected light at an angle offset 110°.

2. Media information under item 1, in which inorganic particles having an average primary particle size of 1 μm or less, and these inorganic particles are contained in the first ink receiving layer contains at least one selected from aluminum oxide, hydrated aluminum oxide and silicon dioxide.

3. Media information under item 1, in which inorganic particles coated with a metal oxide, and these inorganic particles are contained in the first ink receiving layer contains at least one selected from natural mica, synthetic mica, aluminum oxide, hydrated aluminum oxide and silicon dioxide, and the metal oxide contains at least one selected from titanium dioxide, nitric oxide selesai tin oxide.

4. Media information under item 1, in which the content of inorganic particles coated with a metal oxide, and these inorganic particles are contained in the first ink receiving layer is 5.0 mass% or more and 25.0% by mass or less with respect to the content of inorganic particles having an average primary particle size of 1 μm or less, and these inorganic particles are contained in the first ink receiving layer.

5. Media information under item 1, where the inorganic particles having an average primary particle size of 1 μm or less, and these inorganic particles are contained in the first ink receiving layer have an average primary particle size of 0.1 nm or more and 500 nm or less, and the inorganic particles coated with a metal oxide, and these inorganic particles are contained in the first ink receiving layer have an average primary particle size of 15.0 μm or more and 300 μm or less.

6. Media information under item 1,
in which the information carrier includes a base, a first ink receiving layer and the second ink receiving layer, which are arranged in this order,
the second ink receiving layer contains inorganic particles having an average primary particle size of 1 μm or less, and
the second ink receiving layer has a thickness of 18 μm or more and 55 μm or less.

7. Wear the fir information under item 1, which further comprises a primer layer containing borax, and a primer layer feature between the base and the first ink receiving layer.

8. Media information under item 7, in which the content of borax in the primer layer is 0.1 g/m2or more and 1.2 g/m2or less.



 

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3 cl, 1 tbl, 13 ex

FIELD: method and device for colored flexography.

SUBSTANCE: method for applying multiple paint layers onto a substrate includes following stages: application onto a substrate of at least one painting layer of energy-hardened liquid paint with viscosity less than approximately 4000 centipoises, and including reaction-incapable paint thinner, where applied layer of energy-hardened paint has first viscosity; evaporation of at least a part of reaction-incapable paint thinner from applied paint layer for increasing viscosity of applied layer of energy-hardened paint; application onto substrate and applied layer of energy-hardened paint with increased viscosity of at least one layer of non energy-hardened liquid paint, viscosity of which is less than increased viscosity of previously applied layer of energy-hardened paint; and drying of both paint layers on the substrate. Another variant of method for applying multiple paint layers onto a substrate is differentiated by applied layer of energy-hardened paint having to be of increased viscosity compared to following layer of energy-hardened liquid paint with viscosity less than approximately 4000 centipoises, and containing reaction-incapable paint thinner, where viscosity of following layer is less than increased viscosity of energy-hardened paint layer applied beforehand. Also a method is suggested for printing multiple paint layers on a substrate, which includes stage of selection of first and second energy-hardened liquid flexography paint, where each paint contains viscosity controlling reaction-incapable paint thinner, consisting of water in amount of from 5% to 50% of thinner weight, where each paint has viscosity approximately ranging from 30 to 70 centipoises, and stage of serial application of first and second energy-hardened liquid flexography paint onto a substrate to create first and second paint layers, having overlapping parts, where second paint is applied only after at least a part of paint thinner is evaporated in first paint layer. Device for serial application of multiple overlapping paint layers onto a substrate contains substrate route and substrate drive for moving the substrate along a route, where paint application sections are adapted for applying paint onto substrate, which paint includes reaction-incapable paint thinner and has viscosity less than 4000 centipoises, and also management system, which manages transportation of substrate along a route. Viscosity of first layer of liquid paint, applied onto a substrate in one of paint sections, is increased due to evaporation of at least a part of paint thinner from first paint layer to higher viscosity compared to viscosity of second paint, applied on top of first paint layer in next paint section, located at a certain distance from first paint section, up to viscosity, sufficient for "crude" application of second liquid paint layer during transportation of substrate between paint sections.

EFFECT: in suggested methods, relief printing is achieved without insignificant modifications of printing equipment.

4 cl, 2 dwg

FIELD: printing materials.

SUBSTANCE: invention relates to printing ink containing first colorant and second colorant, at least one of the colorants including fluorescent color. First and second colorants are located separately on a printing medium while printing ink ensure obtaining printed image with improved fluorescent properties. Invention further relates to printed image and a method of forming printed image utilizing such ink. Invention solves the problem of reducing fluorescence and improving fluorescent properties by way of separating fluorescence region and colored region as well as by way of formation of area on printing medium wherein points of coagulated first colorant are spread in the region of fixed second colorant so that absorption of fluorescent emission energy from fluorescent colorant is considerably reduced by coexisting colorant involving corresponding technologies. The latter are based on a novel technical conception residing in improvement of characteristics of fluorescent emission of a second colorant used in printing ink including a first fluorescent colorant, which, being excited at specified excitation wavelength, fluoresces within specified wavelength range.

EFFECT: improved fluorescent properties of printed image.

15 cl, 31 dwg, 4 tbl, 33 ex

FIELD: polymer coatings.

SUBSTANCE: invention relates to using powder composition to coat jet printing materials utilized as visual information carriers. Powder composition contains (i) one or several powder silane-containing polyvinyl alcohols based on copolymers of fully or partially hydrolyzed esters having degree of hydrolysis from 75 to 100 mol % and (ii) one or several water re-dispersible polymer powders based on homopolymers or copolymers of one or several monomers selected from group including nonbranched or branched C1-C15-alkylcarboxylic acid vinyl esters, (meth)acrylic acid esters with C1-C15-alcohols, vinylaromatic compounds, olefins, dienes, and vinyl halides.

EFFECT: enabled manufacture of wear-resistant coatings to coat both paper and polymeric substrates, avoided undesired increase in viscosity during composition preparation procedure, and enabled more flexible variation in contents of solids in chalking mass.

10 cl, 15 ex

FIELD: chemistry.

SUBSTANCE: invention pertains to ink for an ink-jet printer. Description is given of the ink for an ink-jet printer, containing 62-77 mass % water, 10-18 mass % dye, X (%), water soluble organic substance 1 and 2.0-15 mass %, Y (%), water soluble organic substance 2. Viscosity of the ink ranges from 1 to 5 cP at 25°C, content X (%) of substance 1 and content Y (%) of substance 2 satisfies the relationship in formula (I) and formula (II): (I) 0.15 ≤ Y/X ≤ 0.9; (II) 15 mass % ≤ X+ Y ≤ 32 mass %. Compound 1 is a water-retaining water soluble organic compound, with difference between the water-retention capacity in a surrounding medium at 23°C and humidity of 45% and water-retention capacity in a surrounding medium at 30°C and 80% humidity at 36% or less. Compound 2 is a water soluble organic compound, different from the dye and from the water soluble organic compound 1.

EFFECT: proposed ink sufficiently suppresses the effect of twisting printing material and provides for stable injection.

26 cl, 6 dwg, 6 tbl, 21 ex

FIELD: polygraphy.

SUBSTANCE: invention relates to water-based printing dye used in the set of reaction liquid with water-based printing dye for image formation. The water-based printing dye is proposed making a part of the system using a reaction liquid including, at least, a polyvalent metal and water-based printing dye comprising, at least a pigment dispersion wherein the pigment is dispersed in anionic polymer disperser. Here note that the water-based printing dye meets the specified requirements.

EFFECT: production of a stable jet printing irrespective of the printing conditions, formation of uniform image with a high resistance to deterioration, clear image even in two-side printing, high-quality image sharpness.

18 cl, 1 tbl, 10 ex

FIELD: polygraphy.

SUBSTANCE: invention relates to water-based printing dye used in the set of reaction liquid with water-based printing dye for image formation. The water-based printing dye is proposed making a part of the system using a reaction liquid including, at least, a polyvalent metal and water-based printing dye comprising, at least a pigment dispersion wherein the pigment is dispersed in anionic polymer disperser. Here note that the water-based printing dye meets the specified requirements.

EFFECT: production of a stable jet printing irrespective of the printing conditions, formation of uniform image with a high resistance to deterioration, clear image even in two-side printing, high-quality image sharpness.

18 cl, 1 tbl, 10 ex

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