| Patent application number | Description | Published |
|---|
| 20090011155 | INK JET RECORDING MEDIUM AND METHOD OF PRODUCING THE SAME - The invention provides an ink jet recording medium which attains the prevention of the bronzing of cyan ink and the prevention of the migration of magenta ink at the same time and is excellent in image characteristics. The ink jet recording medium comprises a substrate and an ink-receiving layer provided with at least an upper layer as the outermost layer and a lower layer as a layer lying just under the upper layer, both layers having a porous structure formed of an alumina hydrate and a binder, wherein both of the upper and lower layers contain an alkylsulfonic acid and only the lower layer contains a cationic polymer. | 01-08-2009 |
| 20110076518 | RECORDING MEDIUM - The invention provides a recording medium having 2 or more ink receiving layers on a substrate, wherein an upper layer of the ink receiving layers, which is a layer most distant from the substrate, and a lower layer, which is a layer located just under the upper layer, contain at least one selected from alumina hydrate and alumina, an acid and a hydrophilic binder, the acid contained in the upper layer is a carboxylic acid represented by the general formula [I], and the acid contained in the lower layer is a sulfonic acid represented by the general formula [II]. | 03-31-2011 |
| 20110104411 | RECORDING MEDIUM - The invention provides a recording medium comprising a substrate and an ink receiving layer that is provided on the substrate and contains alumina hydrate and a binder. A surface of the ink receiving layer is covered with a partial coating formed by a plurality of coatings containing a cationic polyurethane. The plurality of coatings have an average major diameter of 0.03 μm or more and less than 1.00 μm. The partial coating provides a coverage of 10% or more and less than 70% with respect to the surface of the ink receiving layer. | 05-05-2011 |
| 20110135855 | RECORDING MEDIUM AND METHOD FOR PRODUCING RECORDING MEDIUM - The invention provides a method for producing a recording medium, comprising a step of coating one or more ink receiving layers provided on at least one surface of a substrate with an outermost layer coating liquid to form an outermost layer, an ink receiving layer, of said one or more ink receiving layers, which is nearest to the outermost layer containing alumina hydrate and a binder. The outermost layer coating liquid contains monodispersive and spherical cationic colloidal silica particles having an average particle size of 30 nm or more and 60 nm or less, polyvinyl alcohol having a saponification degree of 75% by mol or more and 85% by mol or less and a viscosity-average polymerization degree of 1,500 or more and 2,200 or less, and cationic polyurethane emulsion particles having an average particle size of 10 nm or more and 100 nm or less. | 06-09-2011 |
| 20110256324 | INK JET RECORDING MEDIUM - In an ink jet recording medium having at least two ink receiving layers, the total content of boric acid, a borate, and a water-soluble zirconium salt of a lower ink receiving layer located close to a support substrate to the total content of alumina and an alumina hydrate thereof is higher than the total content of boric acid, a borate, and a water-soluble zirconium salt of an upper ink receiving layer located apart from the support substrate to the total content of alumina and an alumina hydrate thereof. | 10-20-2011 |
| 20110293860 | RECORDING MEDIUM - The invention provides a recording medium having excellent ink absorbency and capable of forming a sharp image thereon. The recording medium has a substrate, and a first layer and an outermost layer provided on the substrate in this order, wherein the first layer contains at least one of alumina and alumina hydrate, the outermost layer contains a pigment and is lower in refractive index than the first layer, and the absolute dry coating amount of the outermost layer is 0.1 g/m | 12-01-2011 |
| 20120015119 | RECORDING MEDIUM - A recording medium includes an ink-receiving layer on a substrate, in which the ink-receiving layer contains hydrated alumina, a C | 01-19-2012 |
| 20120070591 | RECORDING MEDIUM - A recording medium includes an ink-receiving layer on a substrate, in which the ink-receiving layer contains a hydrated alumina, an alkylsulfonic acid having 1 to 4 carbon atoms, and at least one salt of a sulfur compound represented by general formula (1) or (2): | 03-22-2012 |
| 20120094039 | INK JET RECORDING MEDIUM - An ink jet recording medium including a substrate and an ink receiving layer provided on the substrate and composed of two or more layers of at least an upper layer and a lower layer. The ink receiving layer contains polyvinyl alcohol in an amount of 12.7% by mass or more based on the total mass of the ink receiving layer. The upper layer is a layer most distant from the substrate, contains a pigment and polyvinyl alcohol, the pigment containing 90% by mass or more of alumina hydrate, and has a thickness of 3.0-10.0 μm. The lower layer is positioned just under the upper layer, contains a pigment and polyvinyl alcohol, the pigment containing 20% by mass or more of silica, and has a thickness 2.5-10 times larger than that of the upper layer and an average pore radius 0.90-1.30 times larger than that of the upper layer. | 04-19-2012 |
| 20120207949 | RECORDING MEDIUM - A recording medium includes a support; and an ink-receiving layer, the ink-receiving layer having a lower layer and an upper layer, in which the lower layer contains fine inorganic particles, polyvinyl alcohol, and boric acid, the fine inorganic particles including at least one compound selected from alumina, hydrated alumina, and vapor-phase-process silica, in which the upper layer contains fine inorganic particles, polyvinyl alcohol, and boric acid, the fine inorganic particles including at least one compound selected from alumina and hydrated alumina, in which the lower layer has a boric acid content of 2.0% by mass to 7.0% by mass with respect to polyvinyl alcohol, and in which the upper layer has a boric acid content of 10.0% by mass to 30.0% by mass with respect to polyvinyl alcohol. | 08-16-2012 |
| 20120207950 | INK JET RECORDING MEDIUM - An ink jet recording medium including a substrate and two or more ink receiving layers provided on the substrate, wherein a first ink receiving layer that is an outermost ink receiving layer of the two or more ink receiving layers and a second ink receiving layer adjacent to the first ink receiving layer contain an alumina pigment, polyvinyl alcohol and boric acid. The first ink receiving layer contains polyvinyl alcohol in an amount of 7.0-10.5% by mass or less based on the alumina pigment and contains boric acid in an amount of 1.1-1.4% by mass or less based on the alumina pigment. The second ink receiving layer contains polyvinyl alcohol in an amount of 10.5-17.0% by mass or less based on the alumina pigment and contains boric acid in an amount of 1.5-2.5% by mass or less based on the alumina pigment. | 08-16-2012 |
| 20120295042 | INKJET RECORDING MEDIUM - An inkjet recording medium includes a support and an ink-receiving layer which is disposed on the support and which contains an alumina pigment and an alkylsulfonic acid having the carbon number of 1 or more and 4 or less. The ink-receiving layer further contains a polymeric compound, a water-soluble zirconium compound, and boric acid or a borate. The polymeric compound is one obtained by cationizing at least one amino group of a product with acid, the product being obtained by the reaction of at least three compounds, that is, (i) a sulfur-containing organic compound containing two or more active hydrogen atoms, (ii) a polyisocyanate compound containing two or more isocyanate groups, and (iii) an amine compound containing two or more active hydrogen atoms. | 11-22-2012 |
| 20130108809 | RECORDING MEDIUM | 05-02-2013 |
| 20130129943 | RECORDING MEDIUM - A recording medium includes, in sequence, a support, a first ink-receiving layer, and a second ink-receiving layer, in which a content of a boric acid in the first ink-receiving layer is 2.0% by mass or more and 7.0% by mass or less with respect to a content of a polyvinyl alcohol in the first ink-receiving layer, a content of a boric acid in the second ink-receiving layer is 10.0% by mass or more and 30.0% by mass or less with respect to a content of a polyvinyl alcohol in the second ink-receiving layer, an outermost surface layer of the recording medium has a content of particles of 0.5% by mass or more and 5.0% by mass or less, the particles having an average secondary particle size of 1.0 μm or more and 20.0 μm or less with respect to a content of an inorganic pigment. | 05-23-2013 |
| 20130196090 | RECORDING MEDIUM - A recording medium includes a base and at least one ink-receiving layer. A first ink-receiving layer that is at least one ink-receiving layer contains inorganic particles having an average primary particle size of 1 μm or less and inorganic particles coated with a metal oxide. The inorganic particles coated with the metal oxide have an average primary particle size of 15.0 μm or more. When the maximum of a FLOP value of the recording medium is denoted by FLOP | 08-01-2013 |
| 20130266747 | RECORDING MEDIUM - A recording medium includes a base, a second ink-receiving layer, and a first ink-receiving layer in this order. The first ink-receiving layer contains gas-phase method silica, a binder, a cationic polymer having a sulfonyl group, and glycol. The second ink-receiving layer contains gas-phase method silica and a binder and (1) does not contain any cationic polymer having a sulfonyl group or (2) contains a cationic polymer having a sulfonyl group in an amount not higher than 0.1 parts by mass based on 100 parts by mass of the gas-phase method silica. | 10-10-2013 |
| 20130266748 | RECORDING MEDIUM - A recording medium includes a base and an ink-receiving layer. The ink-receiving layer includes inorganic particles, a binder, poly(diallyldimethylamine hydrochloride), a cationic polymer having a sulfonyl group, and a polyvalent metal. | 10-10-2013 |
| 20140004263 | RECORDING MEDIUM AND IMAGE RECORDING PROCESS | 01-02-2014 |
| 20140044898 | RECORDING MEDIUM - A recording medium includes, in sequence, a support, a first ink-receiving layer containing a first inorganic particle and a first binder, a second ink-receiving layer containing a second inorganic particle and a second binder, and a third ink-receiving layer which is an outermost surface layer and contains a third inorganic particle, a third binder, and a particle different from the third inorganic particle and having an average secondary particle size of 1.0 to 20.0 μm. A mass ratio of a content of the first binder to a content of the first inorganic particle is larger than a mass ratio of a content of the second binder to a content of the second inorganic particle. A content of the particle having the specific average secondary particle size is 0.5% by mass or more with respect to a content of the third inorganic particle. | 02-13-2014 |
| 20140377482 | RECORDING MEDIUM - A recording medium includes a support and an ink-receiving layer. The ink-receiving layer contains alumina particles, silica particles and a binder. A composition analysis of the recording medium performed by X-ray photoelectron spectroscopy while etching is performed from a surface side to a support side provides a ratio of the amount of Si element to the total amount of Al element and Si element at an etching time of 0 minutes of 10 atomic percent or more and 90 atomic percent or less and a ratio of the amount of Si element to the total amount of Al element and Si element at an etching time of 5 minutes of 50 atomic percent or more. | 12-25-2014 |
| 20150044396 | RECORDING MEDIUM - A recording medium has a base, a first ink receiving layer, and a second ink receiving layer that is the outermost layer in the stated order, in which the first ink receiving layer is a layer adjacent to the second ink receiving layer, the first ink receiving layer contains fumed silica, the second ink receiving layer contains colloidal silica and resin particles, and the area in which the colloidal silica exists in the recording medium surface is 10% or more and 70% or less. | 02-12-2015 |
| 20150044398 | RECORDING MEDIUM - A recording medium has a base and an ink receiving layer, in which the ink receiving layer contains colloidal silica, a zirconium compound, an ammonium salt, and hydroxycarboxylic acid and 90% or more of the colloidal silica contained in the ink receiving layer exists in a region of 0 nm or more and 300 nm or less in the depth direction from the outermost surface of the recording medium. | 02-12-2015 |
