| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 428838000 | Binder media | 76 |
| 20100247971 | LUBRICANT COMPOSITION, MAGNETIC RECORDING MEDIUM, AND NOVEL POLYETHER COMPOUND - An aspect of the present invention relates to a lubricant composition comprising a polyether compound comprising an alkylene oxide residue and a carbonic acid ester residue. | 09-30-2010 |
| 20100247972 | MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the magnetic layer and/or nonmagnetic layer comprises organic acid A and organic acid B below, with an acid strength pKa(A) of organic acid A and an acid strength pKa(B) of organic acid B satisfying a relation of pKa(A)| 09-30-2010 | |
| 20110229739 | COMPOSITE MAGNETIC RECORDING MEDIA - Composite magnetic recording media are described. A composite structure is a structure that is formed of multiple components. For example, a composite magnetic recording medium may include a substrate, an underlayer formed over the substrate, the underlayer defining a coating surface, and a magnetic layer formed over the coating surface of the underlayer. Composite magnetic recording media constructed according to the materials and techniques disclosed may provide dimensional flexibility while exhibiting improved physical or electromagnetic characteristics. In some examples, dimensional flexibility may be achieved by pairing a substrate greater than or equal to approximately 4000 nanometers thick with an underlayer less than or equal to approximately 890 nanometers thick. | 09-22-2011 |
| 428839000 | Multiple magnetic layers | 3 |
| 20100227201 | MAGNETIC RECORDING MEDIUM - A magnetic recording medium having a nonmagnetic substrate, and a soft magnetic layer and a ferromagnetic layer having a thickness of 5 to 150 nm formed in this order on the nonmagnetic substrate, in which, the ferromagnetic layer contains a spherical, ellipsoidal or plate-form ferromagnetic powder and a binder, and has an axis of easy magnetization substantially in a perpendicular direction, and the soft magnetic layer contains a spherical or ellipsoidal magnetite soft magnetic powder having a particle size of 30 nm or less, a rate of variation in particle size of 20% or less and a saturation magnetization of 10 to 60 Am | 09-09-2010 |
| 428839100 | Magnetic layers only on single side of substrate | 2 |
| 428839200 | Two magnetic layers on single side of substrate | 2 |
| 20110223446 | PERPENDICULAR MAGNETIC RECORDING MEDIUM - An object of the present invention is to provide a perpendicular magnetic recording medium the SNR of which is further improved while a high coercive force Hc is secured so that a higher recoding density can be achieved. | 09-15-2011 |
| 428839600 | Specified property (e.g., density, Tg, etc.) | 1 |
| 20140272473 | DAMPING CONTROLLED COMPOSITE MAGNETIC MEDIA FOR HEAT ASSISTED MAGNETIC RECORDING - A magnetic stack includes a substrate and a magnetic recording layer disposed over the substrate. The magnetic recording layer comprises magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains. One or both of the magnetic crystalline grains and the segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping value, α, between about 0.1 to about 1. | 09-18-2014 |
| 428840000 | Single magnetic layer with underlayer | 37 |
| 20080318087 | MAGNETIC RECORDING MEDIUM, AND METHOD OF MANUFACTURE THEREOF - Provided is a magnetic recording medium which causes a reduction of transition noises and has a high productivity, and a method of manufacture thereof. The method of manufacturing a magnetic recording medium, comprising:
| 12-25-2008 |
| 20090087685 | MAGNETIC RECORDING MEDIUM - The magnetic recording medium comprises a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support. The magnetic layer has an average surface roughness Ra, measured by an atomic force microscope, ranging from 2.0 to 3.5 nm and an indentation hardness ranging from 0.49 GPa to 0.78 GPa, as well as further comprises a carbonic ester having a molecular weight of 360 to 460 that is denoted by general formula (1). | 04-02-2009 |
| 20090246559 | MAGNETIC RECORDING MEDIUM AND PROCESS OF PRODUCING THE SAME - A magnetic recording medium has a cut surface along an edge of the magnetic recording medium and includes, in the following order: a nonmagnetic support having a Young's modulus of 8 GPa or more in a width direction; a nonmagnetic layer formed by radiation curing a dispersion of a radiation curing compound and a nonmagnetic powder in a binder; and a magnetic layer containing a ferromagnetic powder dispersed in a binder, and the cut surface has a waviness of from 20% to 50% as defined herein. | 10-01-2009 |
| 20090258254 | SULFONIC ACID POLYOL COMPOUND, POLYURETHANE RESIN, POLYURETHANE RESIN FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM - A compound represented by the Formula below is provided. | 10-15-2009 |
| 20100035087 | PROCESS FOR PRODUCING FERROMAGNETIC METAL PARTICLES AND MAGNETIC RECORDING MEDIUM - The present invention relates to ferromagnetic metal particles having an average major axis diameter (L) of 10 to 100 nm which satisfy a relationship between the average major axis diameter (L) and a particle SFD represented by the following formula: | 02-11-2010 |
| 20100143751 | MAGNETIC RECORDING MEDIA HAVING LOW BROADBAND NOISE - A dual-layer magnetic recording tape having a non-magnetic substrate with a front side and a back side, a lower support layer formed over the front side and a magnetic recording layer formed over the lower support layer. The magnetic recording layer includes magnetic metallic pigment particles having an average particle length up to about 35 nm, and a coercivity of at least about 2,000 Oersteds. The magnetic tape has a BB noise less than about −91 dB at about 93 kfci. | 06-10-2010 |
| 20110045319 | Process For Producing Magnetic Recording Medium - Subject: A process for producing a magnetic recording medium, having a magnetic recording layer and a protective layer on a substrate which is a non-magnetic support, wherein the medium is able to greatly inhibit migration of a lubricant from the protective layer to the surface of the metal pressing plate having a mirrored finish in a hot pressing step during production of the magnetic recording medium, while maintaining satisfactory scratch resistance, suitable adhesion with the magnetic recording layer and the protective layer, and excellent read and write properties of the magnetic recording medium. | 02-24-2011 |
| 20120214022 | MAGNETIC TAPE AND METHOD FOR PRODUCING THE SAME - A magnetic tape produced by cutting a magnetic sheet with a wide breadth into a tape having a predetermined width using a cutting device, in which the magnetic sheet has a magnetic layer containing magnetic powder and a hinder formed on one surface of a non-magnetic substrate having a thickness of 4 μm or less, and a center line average height (Ra) along a roughness curve of a cut edge of the magnetic tape is from 0.08 to 0.25 μm. | 08-23-2012 |
| 20140120376 | MAGNETIC TAPE AND METHOD FOR PRODUCING THE SAME - A magnetic tape produced by cutting a magnetic sheet with a wide breadth into a tape having a predetermined width using a cutting device, in which the magnetic sheet has a magnetic layer containing magnetic powder and a hinder formed on one surface of a non-magnetic substrate having a thickness of 4 μm or less, and a center line average height (Ra) along a roughness curve of a cut edge of the magnetic tape is from 0.08 to 0.25 μm. | 05-01-2014 |
| 20160189739 | Magnetic tape and method of manufacturing the same - Provided is a magnetic tape, which comprises, on a nonmagnetic support, a nonmagnetic layer comprising nonmagnetic powder and binder, and on the nonmagnetic layer, a magnetic layer comprising ferromagnetic powder and binder; wherein a total thickness of the magnetic tape is less than or equal to 4.80 μm; at least the magnetic layer comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide; and a C—H derived carbon, C, concentration calculated from a C—H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on a surface on the magnetic layer side of the magnetic tape is greater than or equal to 45 atom %. | 06-30-2016 |
| 428840100 | Underlayer composition or structure | 24 |
| 20080241602 | MAGNETIC RECORDING MEDIUM AND PROCESS FOR PRODUCING THE SAME - The present invention provides a magnetic recording medium wherein both of a reduction in the particle diameter of a ferromagnetic powder and an increase in the filling ratio of the powder in a magnetic layer are attained and the magnetic layer is excellent in surface smoothness and electromagnetic conversion property. A magnetic recording medium comprising at least a non-magnetic support, a lower non-magnetic layer on one surface of the non-magnetic support, and an upper magnetic layer on the lower non-magnetic layer, wherein the lower non-magnetic layer contains at least carbon black, a non-magnetic inorganic powder other than carbon black, and a binder resin, the upper magnetic layer contains at least a ferromagnetic powder and a binder resin containing a polar group, and the ferromagnetic powder is a ferromagnetic metal powder having an average major axis length of 10 to 50 nm, or a hexagonal ferrite magnetic powder having an average plate diameter of 5 to 40 nm, and the polar-group-containing binder resin is contained in the upper magnetic layer in such an amount that a proportion of said polar group to unit specific surface area based on the BET method of the ferromagnetic powder is set into a range of 0.18 to 0.35 μmol/m | 10-02-2008 |
| 20110027619 | RADIATION-CURABLE VINYL CHLORIDE RESIN COMPOSITION AND MAGNETIC RECORDING MEDIUM USING THE SAME - An aspect of the present invention relates to a radiation-curable vinyl chloride resin composition comprising a vinyl chloride resin containing a radiation-curable functional group, and/or starting material compounds thereof, as well as a benzoquinone compound. | 02-03-2011 |
| 20130230742 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - According to one embodiment, a magnetic recording medium includes a data region and a servo region adjacent to the data region and including a magnetic recording layer, the magnetic recording layer including first and second patterned regions adjacent to each other, the first patterned region including a first nonmagnetic matrix and first magnetic particles dispersed in the first nonmagnetic matrix and having magnetization oriented in a first direction, the second patterned region includes a second nonmagnetic matrix and second magnetic particles dispersed in the second nonmagnetic matrix and having magnetization oriented in a second direction opposite to the first direction, sizes of the first magnetic particles being smaller than sizes of the second magnetic particles. | 09-05-2013 |
| 20160005430 | MAGNETIC RECORDING MEDIUM - The magnetic recording medium of the present invention comprises: a non-magnetic substrate; a non-magnetic layer formed on one of principal surfaces of the non-magnetic substrate; and a magnetic layer formed on a principal surface of the non-magnetic layer opposite to the non-magnetic substrate. Mr and t satisfy 0.0020 μT·m≦Mr·t≦0.0150 μT·m, where Mr is the residual magnetic flux density of the magnetic layer, and t is the average thickness of the magnetic layer, L1 satisfies 2 nm≦L1≦6 nm, where L1 is the average thickness of a first mixed layer that is formed on the surface of the magnetic layer opposite to the non-magnetic layer, and L2 satisfies 0.1≦L2/t≦0.45, where L2 is the average thickness of a second mixed layer that is formed on the surface of the magnetic layer facing the non-magnetic layer. | 01-07-2016 |
| 20160027460 | CONDUCTIVE POLYMERS FOR USE IN MAGNETIC MEDIA - According to one embodiment, a magnetic recording medium includes a substrate, an underlayer positioned above the substrate, a magnetic recording layer positioned above the underlayer, and a plurality of conductive polymers dispersed within at least one of the substrate, the underlayer and the magnetic recording layer. | 01-28-2016 |
| 428840200 | Nonmagnetic particles in underlayer (e.g., A12O3 particles, etc.) | 14 |
| 20090087686 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a magnetic recording medium comprising a coating layer on a nonmagnetic support, wherein the coating layer comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order, the nonmagnetic support comprises a main component in the form of a resin obtained by mixing and/or copolymerizing a polyester and a polymer having compatibility with the polyester, has a glass transition temperature of equal to or higher than 80° C. but less than 125° C., and has a heat absorption peak, based on enthalpy relaxation, ranging from 0.5 to 2.0 J/g. Another aspect of the present invention relates to a method of manufacturing a magnetic recording medium. | 04-02-2009 |
| 20100055504 | METHOD OF MODIFYING SURFACE OF POWDER, COATING MATERIAL, METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM MANUFACTURED BY THE SAME - An aspect of the present invention relates to a method of modifying a surface of a powder, comprising mixing a powder with a compound denoted by general formula (I): | 03-04-2010 |
| 20100055505 | MAGNETIC RECORDING MEDIUM, BINDER FOR MAGNETIC RECORDING MEDIUM, AND POLYURETHANE RESIN - An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic power and a binder on a nonmagnetic support, wherein,
| 03-04-2010 |
| 20100273029 | MIXTURE COMPRISING SULFONATE GROUP-CONTAINING COMPOUND AND METHOD OF MANUFACTURING THE SAME, SOLUTION COMPOSITION, POLYURETHANE RESIN AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a mixture of a sulfonate group-containing compound denoted by general formula (1) with a protonic acid: | 10-28-2010 |
| 20110229740 | MAGNETIC TAPE AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a magnetic tape comprising a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order on a nonmagnetic support. The nonmagnetic layer is a radiation-cured layer formed by curing with radiation a given radiation-curable composition. The nonmagnetic layer has a thickness ranging from 0.5 to 1.3 μm. The relation between the nonmagnetic powder and the binder component contained in the radiation-curable composition satisfies equation (I): | 09-22-2011 |
| 20120045664 | MAGNETIC RECORDING MEDIUM - A magnetic recording medium of the present invention is a magnetic recording medium including a non-magnetic substrate; a non-magnetic layer that is formed on one of principal surfaces of the non-magnetic substrate and contains a non-magnetic powder, a binder, and a lubricant; and a magnetic layer that is formed on a principal surface of the non-magnetic layer opposite to the non-magnetic substrate and contains a magnetic powder and a binder. The magnetic powder has an average particle size between 10 inn and 35 nm inclusive. The lubricant is migratable to the magnetic layer and forms a lubricant layer on a surface of the magnetic layer when a pressure is applied to the magnetic layer. When spacing of the surface of the magnetic layer before and after washing the lubricant with n-hexane is measured with a TSA (Tape Spacing Analyzer), the value of the spacing after washing is 3 to 10 nm, and the value of the spacing before washing is 1 to 5 nm smaller than the value of the spacing after washing. | 02-23-2012 |
| 20120177950 | BINDER RESIN COMPOSITION FOR MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a binder resin composition for a magnetic recording medium, which comprises a vinyl chloride resin containing a radiation-curable functional group, and a methacrylate compound denoted by formula (A): | 07-12-2012 |
| 20130260179 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a magnetic recording medium, which comprises a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the nonmagnetic layer has a thickness of equal to or less than 300 nm; a composite elastic modulus as measured on a surface of the magnetic layer ranges from 6.0 to 8.0 GPa; the magnetic layer comprises an abrasive with a specific surface area by BET method ranging from 14 m | 10-03-2013 |
| 20150380036 | MAGNETIC TAPE - An aspect of the present invention relates to a magnetic tape comprising a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein ΔSFD in a longitudinal direction of the magnetic tape as calculated with Equation 1 ranges from 0.35 to 1.50: | 12-31-2015 |
| 20160093322 | MAGNETIC TAPE - The magnetic tape comprises, on a nonmagnetic support, a nonmagnetic layer comprising nonmagnetic powder and binder, and on the nonmagnetic layer, a magnetic layer comprising ferromagnetic powder, nonmagnetic powder, and binder, wherein a total thickness of the magnetic tape is less than or equal to 4.80 μm, and a coefficient of friction as measured on a base portion of a surface of the magnetic layer is less than or equal to 0.35. | 03-31-2016 |
| 428840300 | Carbon black particles | 4 |
| 20090042064 | NON-MAGNETIC PARTICLES FOR NON-MAGNETIC UNDERCOAT LAYER OF MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM - The present invention relates to non-magnetic particles for non-magnetic undercoat layer of magnetic recording medium, comprising: hematite particles; an inner coating layer comprising a phosphorus-containing inorganic compound which is formed on a surface of the respective hematite particles; and an outer coating layer comprising an aluminum-containing inorganic compound which is formed on an outside of the inner coating layer comprising the phosphorus-containing inorganic compound. | 02-12-2009 |
| 20140087212 | CARBON BLACK COMPOSITION, CARBON BLACK-CONTAINING COATING FILM, AND MAGNETIC RECORDING MEDIUM COMPRISING THE SAME - The carbon black composition includes carbon black and an amine compound denoted by formula (1) in a solvent: | 03-27-2014 |
| 20160064024 | MAGNETIC TAPE - The magnetic tape comprises, on one surface of a nonmagnetic support, a nonmagnetic layer comprising nonmagnetic powder, lubricant, and binder, comprises, on a surface of the nonmagnetic layer, a magnetic layer comprising magnetic powder, lubricant, and binder, and comprises, on the opposite surface of the nonmagnetic support from the surface on which the nonmagnetic layer and magnetic layer are present, a backcoat layer comprising nonmagnetic powder, lubricant, and binder, wherein the contact angle for water of a surface of the magnetic layer ranges from 95° to 100°, and the contact angle for water of a surface of the backcoat layer ranges from 95° to 100°. | 03-03-2016 |
| 20160093323 | MAGNETIC TAPE AND METHOD OF MANUFACTURING THE SAME - The magnetic tape comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and comprises a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein a fatty acid ester, a fatty acid amide, and a fatty acid are contained in either one or both of the magnetic layer and the nonmagnetic layer, with the magnetic layer and nonmagnetic layer each comprising at least one selected from the group consisting of a fatty acid ester, a fatty acid amide, and a fatty acid, a quantity of fatty acid ester per unit area of the magnetic layer in extraction components extracted from a surface of the magnetic layer with n-hexane falls within a range of 1.00 mg/m | 03-31-2016 |
| 428840400 | Lubricant in underlayer (e.g., perfluoether, etc.) | 3 |
| 20110274947 | MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a magnetic recording medium comprising on one surface of a nonmagnetic support a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order, as well as comprising a backcoat layer on the other surface of the nonmagnetic support. The nonmagnetic layer is a radiation-cured layer formed by curing with radiation a given radiation-curable composition, and the backcoat layer comprises filler particles with an average primary particle diameter, D50, ranging from 0.05 to 1.0 μm, the filler particles being selected from the group consisting of organic polymer particles and inorganic colloidal particles. | 11-10-2011 |
| 20160064025 | MAGNETIC RECORDING MEDIUM - The magnetic recording medium comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support and a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein the magnetic layer comprises a lubricant and a 1-bromonaphthalene contact angle adjusting agent that is capable of adjusting a contact angle for 1-bromonaphthalene, the contact angle for 1-bromonaphthalene being measured on a surface of the magnetic layer, and the contact angle measured on the surface of the magnetic layer ranges from 45.0° to 55.0° for 1-bromonaphthalene, and ranges from 90.0° to 100.0° for water. | 03-03-2016 |
| 20160189740 | MAGNETIC TAPE AND METHOD OF MANUFACTURING THE SAME - Provided is a magnetic tape, which comprises, on a nonmagnetic support, a nonmagnetic layer comprising nonmagnetic powder and binder, and on the nonmagnetic layer, a magnetic layer comprising ferromagnetic powder and binder; wherein at least the magnetic layer comprises one or more components selected from the group consisting of a fatty acid and a fatty acid amide; a quantity of components selected from the group consisting of a fatty acid and a fatty acid amide per unit area of the magnetic tape among components that are extracted from a surface on the magnetic layer side of the magnetic tape is less than or equal to 15.0 mg/m | 06-30-2016 |
| 428840500 | Chemically identified underlayer binder | 2 |
| 20110229741 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the binder of the magnetic layer is a mixture of a vinyl chloride copolymer, polyurethane resin, and polyisocyanate, the polyurethane resin having a glass transition temperature ranging from 90 to 130° C. and a storage elastic modulus at 80° C. ranging from 2.5 to 5.0 GPa, the nonmagnetic layer is a radiation-cured layer formed by curing with radiation a radiation-curable composition comprising a nonmagnetic powder and a binder component, the binder component comprising a radiation-curable vinyl chloride copolymer and a radiation-curable polyurethane resin, and the radiation-curable vinyl chloride copolymer and radiation-curable polyurethane resin both have glass transition temperatures ranging from 30 to 100° C. | 09-22-2011 |
| 20110244270 | BINDER COMPOSITION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a binder composition for a magnetic recording medium, which comprises a vinyl copolymer comprising a structural unit denoted by general formula [1]: | 10-06-2011 |
| 428840600 | Magnetic layer chemical composition | 3 |
| 20090136783 | MAGNETIC RECORDING MEDIUM AND PROCESS FOR PRODUCTION OF MAGNETIC RECORDING MEDIUM - The invention provides a magnetic recording medium with both weather resistance and high recording density. The magnetic recording medium of the invention has a magnetic layer comprising at least SmCo-based magnetic fine particles and a hydrophobic binder, wherein the SmCo-based magnetic fine particles include a core composed of SmCo-based nanoparticles and a hydrophilic polymer covering at least a portion of the surface of the core. | 05-28-2009 |
| 20150380037 | MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a magnetic recording medium, which comprises a nonmagnetic layer comprising nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer comprising ferromagnetic powder and binder on the nonmagnetic layer, wherein the magnetic layer further comprises carbon black, and a state in which the carbon black is present, as observed in a reflection electron image of a surface of the magnetic layer obtained by a scanning electron microscope, satisfies condition 1 and condition 2 below:
| 12-31-2015 |
| 20160180875 | MAGNETIC RECORDING MEDIUM | 06-23-2016 |
| 428842000 | Single magnetic layer | 33 |
| 20100239891 | MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support, wherein the magnetic layer comprises compound A and/or a ring-opened product of compound A. Another aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the nonmagnetic layer comprises compound A and/or a ring-opened product of compound A. Compound A comprises a lactone ring substituted with at least one polar group selected from the group consisting of a hydroxyl group, a carboxyl group, and an amino group, or substituted with a substituent comprising the above polar group. | 09-23-2010 |
| 20130108891 | MAGNETIC POWDER AND METHOD OF MANUFACTURING THE SAME, AND ITS USAGE | 05-02-2013 |
| 20140044994 | METHOD AND DEVICE FOR TRACEABILITY MARKING AND PACKAGING LINE PROVIDED WITH TRACEABILITY MARKING DEVICE - The present invention relates to a method for visualization of non-visible information on a packaging material to provide traceability. The method comprises the steps of: reading the non-visible information from the packaging material by means of a magnetic head reader, processing the non-visible information in a central processing unit together with additional new non-visible information, and printing an optional portion of the amount of combined non-visible information onto the packaging material as a traceability marking. The invention also relates to a device for carrying out the method and a packaging line with a filling machine making use of the device. | 02-13-2014 |
| 428842100 | Having chemically specified magnetic particles (e.g., FeCo, CoNiPt, etc.) | 19 |
| 428842200 | Organic compound encapsulated or coated magnetic particles (e.g., polystyrene encapsulated magnetic particles, etc.) | 3 |
| 20090142623 | MAGNETIC RECORDING MEDIUM AND METHOD FOR PRODUCING THE SAME - The present invention provides a magnetic recording medium capable of obtaining high recording density and also having a hardly charged magnetic layer. The magnetic recording tape | 06-04-2009 |
| 20130164563 | MAGNETIC PARTICLES AND METHOD OF MANUFACTURING THE SAME, AND USAGE THEREOF - An aspect of the present invention relates to a method of manufacturing magnetic particles, which comprises adding a carboxylic acid compound to a water-based magnetic liquid, wherein the water-based magnetic liquid comprises magnetic particles dispersed in an acidic water-based solvent, and the carboxylic acid compound is selected from the group consisting of aromatic compounds and aliphatic compounds having one or more carboxylic acid (salt) groups denoted by: | 06-27-2013 |
| 20130164564 | MAGNETIC PARTICLES AND METHOD OF MANUFACTURING THE SAME, AND USAGE THEREOF - An aspect of the present invention relates to a method of manufacturing magnetic particles, which comprises: adding a compound to a water-based magnetic liquid, wherein the water-based magnetic liquid comprises magnetic particles dispersed in an acidic water-based solvent, and the compound is selected from the group consisting of amine compounds, aromatic compounds, and aliphatic compounds having one or more monovalent phosphorus polar groups denoted by: | 06-27-2013 |
| 428842300 | Ferromagnetic (elemental or alloy) particles | 8 |
| 20090087687 | SULFONIC ACID POLYOL COMPOUND, POLYURETHANE RESIN, POLYURETHANE RESIN FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM - A compound represented by the Formula below is provided. | 04-02-2009 |
| 20090092857 | METHOD OF MANUFACTURING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM MANUFACTURED BY THE SAME - The present invention relates to a method of manufacturing a magnetic recording medium comprising coating a magnetic layer coating liquid comprising a ferromagnetic hexagonal ferrite powder and a binder to form a coating film, subjecting the coating film to orientation processing while the coating film is still wet, and drying the coating film to form a magnetic layer. The magnetic layer coating liquid is prepared by subjecting a ferromagnetic hexagonal ferrite powder with an average plate diameter of 10 to 50 nm to a dry comminution step, subjecting the ferromagnetic hexagonal ferrite powder to a first dispersion step together with a binder to prepare a dispersion liquid, and sequentially subjecting the dispersion liquid obtained to a second dispersion step and a filtering step. The dispersion liquid obtained by the first dispersion step comprises a dry solid component in an amount, as measured after filtration, of 15 percent or less. | 04-09-2009 |
| 20130084470 | MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support, wherein the ferromagnetic powder has a hexagonal ferrite structure, the magnetic layer comprises a coefficient of friction-lowering component in the form of nonmagnetic inorganic particles, and a compound in which a substituent selected from the group consisting of a hydroxyl group and a carboxyl group is directly substituted on an aromatic ring. | 04-04-2013 |
| 20140255728 | MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a magnetic recording medium, which comprises magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, the ferromagnetic hexagonal ferrite powder has an activation volume ranging from 800 nm | 09-11-2014 |
| 20140295214 | HEXAGONAL FERRITE MAGNETIC PARTICLES, MAGNETIC RECORDING POWDER, AND MAGNETIC RECORDING MEDIUM - Hexagonal ferrite magnetic particles have an activation volume ranging from 1,000 nm | 10-02-2014 |
| 20150093599 | COMPOSITION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - The magnetic coating composition for a magnetic recording medium comprises:
| 04-02-2015 |
| 20150093600 | FERROMAGNETIC HEXAGONAL FERRITE POWDER, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to ferromagnetic hexagonal ferrite powder, the average particle size of which is equal to or less than 20 nm, and which comprises, on a particle number basis, equal to or more than 50% of ellipsoid hexagonal ferrite powders satisfying relation (1): 1.2| 04-02-2015 | |
| 428842400 | Inorganic compound encapsulated or coated magnetic particles (e.g., Co oxide coated Fe particles, etc.) | 1 |
| 20110244271 | HEXAGONAL FERRITE MAGNETIC POWDER AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic powder comprising discharging a melt of a starting material mixture comprising a glass-forming component and a hexagonal ferrite-forming component through an outlet provided in the bottom surface of the melting vat and supplying it between a pair of rotating milling rolls positioned beneath the melting vat; discharging an amorphous material from between the rolls by roll quenching the melt that has been supplied between the milling rolls, wherein at least an outermost layer portion of the milling rolls is comprised of a material with a Young's modulus of 500 GPa or higher and a Rockwell hardness of 85.0 HRA or higher, and the outermost layer portion has a thickness of 5 mm or greater and a surface roughness of 0.5 μm or less. | 10-06-2011 |
| 428842500 | Magnetic metal oxide, nitride, or carbide particles | 8 |
| 428842600 | Inorganic compound encapsulated or coated magnetic particles (e.g., Co coated Fe2O3, etc.) | 1 |
| 20090087688 | IRON NITRIDE POWDER, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to an iron nitride powder. The iron nitride powder is comprised chiefly of Fe | 04-02-2009 |
| 428842800 | Hexagonal or plate lattice-shaped oxides | 7 |
| 20100021771 | METHOD OF MANUFACTURING HEXAGONAL FERRITE MAGNETIC POWDER, MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic powder comprising preparing a melt by melting a starting material mixture, wherein the starting material mixture comprises at least one hexagonal ferrite-forming component and glass-forming component comprising at least one B | 01-28-2010 |
| 20110244272 | HEXAGONAL FERRITE MAGNETIC PARTICLE AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a method of manufacturing a hexagonal ferrite magnetic particle comprising melting an Al-containing starting material mixture to prepare a melt and quenching the melt to obtain an amorphous material; subjecting the amorphous material to heat treatment to cause a hexagonal ferrite magnetic particle to precipitate in a product obtained by the heat treatment; collecting a hexagonal ferrite magnetic particle by subjecting the product to treatment with an acid and washing, wherein the hexagonal ferrite magnetic particle collected has a particle size ranging from 15 to 30 nm, comprises 0.6 to 8.0 weight percent of Al, based on Al | 10-06-2011 |
| 20120177951 | HEXAGONAL BARIUM FERRITE MAGNETIC PARTICLE AND METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a hexagonal barium ferrite magnetic particle, wherein, relative to 100 atom percent of a Fe content, an Al content ranges from 1.5 to 15 atom percent, a combined content of a divalent element and a pentavalent element ranges from 1.0 to 10 atom percent, an atomic ratio of a content of the divalent element to a content of the pentavalent element is greater than 2.0 but less than 4.0, and an activation volume ranges from 1,300 to 1,800 nm | 07-12-2012 |
| 20120244387 | METHOD OF MANUFACTURING HEXAGONAL FERRITE MAGNETIC POWDER, MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a method of manufacturing hexagonal ferrite magnetic powder. The method of manufacturing hexagonal ferrite magnetic powder comprises wet processing hexagonal ferrite magnetic particles obtained following acid treatment in a water-based solvent to prepare an aqueous magnetic liquid satisfying relation (1) relative to an isoelectric point of the hexagonal ferrite magnetic particles: pH0−pH*≧2.5, wherein, pH0 denotes the isoelectric point of the hexagonal ferrite magnetic particles and pH* denotes a pH of the aqueous magnetic liquid, which is a value of equal to or greater than 2.0, adding a surface-modifying agent comprising an alkyl group and a functional group that becomes an anionic group in the aqueous magnetic liquid to the aqueous magnetic liquid to subject the hexagonal ferrite magnetic particles to a surface-modifying treatment, and removing the water-based solvent following the surface-modifying treatment to obtain hexagonal ferrite magnetic particles. | 09-27-2012 |
| 20140272474 | MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the ferromagnetic powder is ferromagnetic hexagonal ferrite powder comprising 3 to 12 weight percent of Al, based on Al | 09-18-2014 |
| 20140287270 | HEXAGONAL FERRITE MAGNETIC POWDER AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to hexagonal ferrite magnetic powder, which has an activation volume ranging from 900 nm | 09-25-2014 |
| 20160141084 | HEXAGONAL FERRITE MAGNETIC POWDER FOR MAGNETIC RECORDING, METHOD FOR PRODUCING HEXAGONAL FERRITE MAGNETIC PARTICLES, AND MAGNETIC RECORDING MEDIUM - Provided are hexagonal ferrite magnetic powder for magnetic recording, being comprised of hexagonal ferrite magnetic particles having a crystalline metal oxide adhered to a surface thereof, a method for producing hexagonal ferrite magnetic particles having a crystalline metal oxide adhered to a surface thereof, and a magnetic recording medium. | 05-19-2016 |
| 428843000 | With organic compound adjuvant in magnetic layer | 4 |
| 428843100 | Dispersant or surfactant | 3 |
| 20120003503 | MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - An aspect of the present invention relates to a method of manufacturing a magnetic recording medium comprising dispersing magnetic particles in a water-based solvent having a pH that is lower than an isoelectric point of the magnetic particles to prepare a magnetic liquid, wherein the dispersing is conducted to a state of dispersion where a particle diameter in liquid is equal to or lower than 35 nm; adjusting a zeta potential of the magnetic particles to within a range of 0 to 25 mV by modifying a surface of the magnetic particles with the addition of a prescribed surface-modifying agent to the. magnetic liquid; dispersing the magnetic particles after the adjusting together with an organic solvent and a binder to prepare a magnetic coating material; and forming a magnetic layer of the magnetic recording medium with the magnetic coating material that has been prepared. | 01-05-2012 |
| 20140287271 | MAGNETIC RECORDING MEDIUM - The magnetic recording medium comprises protrusions on a surface of a magnetic layer such that when protrusions of equal to or more than 8 nm in height as measured by AFM on the surface of the magnetic layer are divided into protrusions A formed of a spherical material and protrusions B formed of a non-spherical material, a value a, obtained by adding three times a standard deviation σ of heights of protrusions A to an average value of the heights of protrusions A, a value b, obtained by adding three times a standard deviation σ of heights of protrusions B to an average value of the heights of protrusions B, and a difference c, obtained by subtracting b from a, are calculated, conditions 13 nm≦a≦25 nm, 13 nm≦b≦25 nm, and 0.0 nm≦c≦10 nm are satisfied. | 09-25-2014 |
| 20160093321 | MAGNETIC RECORDING MEDIUM AND COATING COMPOSITION FOR MAGNETIC RECORDING MEDIUM - The magnetic recording medium comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, and further comprises a compound denoted by Formula (1): | 03-31-2016 |
| 428843700 | Acids, amines, amides, or salts thereof | 1 |
| 20120295135 | VINYL POLYMER AND USAGE THEREOF - An aspect of the present invention relates to a method of manufacturing a vinyl polymer, which comprises: mixing a first liquid and a second liquid to conduct an addition reaction, wherein the first liquid has been obtained by reacting a sulfonic acid group-containing compound selected from the group consisting of taurine, N-methyl taurine, and meta-aminobenzenesulfonic acid with an alkali metal hydroxide in methanol, the second liquid comprises a vinyl polymer having an intramolecular epoxy group in a ketone solvent, and the addition reaction incorporates a sulfonic acid alkali metal salt group onto a side chain of the vinyl polymer. | 11-22-2012 |
| 428844000 | With nonmagnetic particles (e.g., hematite particles, polystyrene, and polyisoprene copolymer, etc.) | 2 |
| 20120196156 | MAGNETIC TAPE - An aspect of the present invention relates to a magnetic tape comprising, on one surface of a nonmagnetic support, a nonmagnetic layer containing a nonmagnetic powder and a binder, and thereon, a magnetic layer containing a ferromagnetic powder and a binder, wherein
| 08-02-2012 |
| 428844100 | Only single-type nonmagnetic particle | 1 |
| 20130230743 | MAGNETIC STORAGE MEDIUM COMPRISED OF MAGNETIC NANOPARTICLES CONTAINED WITHIN NANOTUBES - A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within nanotubes (e.g., carbon nanotubes). | 09-05-2013 |
| 428844500 | Chemically specified polymer binder | 5 |
| 20100247973 | REDUCED-ENVIRONMENTAL-IMPACT MAGNETIC SHEET SYSTEMS - A reduced-environmental-impact magnetic-sheet systems, processes and methods comprising flexible magnetic sheet material made with reduced-environmental-impact magnetic products from both pre-consumer and post-consumer recycled products. | 09-30-2010 |
| 20110076517 | BINDER COMPOSITION FOR MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING MEDIUM - An aspect of the present invention relates to a binder composition for a magnetic recording medium, which comprises a vinyl copolymer comprising a structural unit denoted by general formula [1],: | 03-31-2011 |
| 428844800 | Polyurethane binder | 3 |
| 20090087689 | MAGNETIC RECORDING MEDIUM - The magnetic recording medium comprises a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support. In the magnetic recording medium, a number of protrusions equal to or greater than 10 nm in height on the magnetic layer surface, as measured by an atomic force microscope, ranges from 50 to 500/1,600 μm | 04-02-2009 |
| 20090246560 | MAGNETIC RECORDING MEDIUM, METHOD OF MODIFYING SURFACE OF MAGNETIC POWDER AND MAGNETIC COATING MATERIAL - An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support, wherein the magnetic layer comprises a compound denoted by general formula (1): | 10-01-2009 |
| 20130029183 | CARBON BLACK COMPOSITION AND USAGE THEREOF - An aspect of the present invention relates to a carbon black composition, which comprises carbon black; an organic tertiary amine selected from the group consisting of an aliphatic tertiary monoamine and an alicyclic tertiary amine; and at least one organic solvent selected from the group consisting of methyl ethyl ketone, cyclohexanone, isophorone, and ethanol. | 01-31-2013 |
