Abstract: Magnetic storage media that include a multilayer structure are described. In general, the magnetic storage media include a substrate, an underlayer that includes a plurality of underlayer particles formed over the substrate, and a magnetic layer that includes a plurality of magnetic particles formed over the underlayer. The magnetic layer may define a saturated magnetization and thickness product less than or equal to approximately 1.00 memu per square centimeter, and the magnetic particles may be selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5. In addition, the described magnetic storage media may exhibit minimal interlayer diffusion between the underlayer and magnetic layer. Reduced interlayer diffusion between different layers of a magnetic recording medium may result in an improved magnetic recording surface for recording and storing data.

Abstract: Magnetic storage media and methods for constructing magnetic storage media that include a multilayer structure are described. In general, the magnetic storage media include a substrate, an underlayer formed over the substrate, and a magnetic layer that includes a plurality of magnetic particles formed over the underlayer. In some examples, a magnetic recording medium can be formed by forming an underlayer over a substrate, drying the underlayer, and heat-curing the underlayer prior to forming a magnetic layer over the underlayer. A magnetic layer can then be formed over the underlayer. The magnetic layer may includes a plurality of magnetic particles selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5, may then be formed over the underlayer.

Abstract: Magnetic storage media and methods for constructing magnetic storage media that include a multilayer structure are described. In some examples, a magnetic recording medium can be formed by forming an underlayer over a substrate, drying the underlayer, milling a plurality of magnetic particles, and forming a magnetic layer that includes the plurality of magnetic particles over the underlayer. The magnetic particles may be selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5. In addition, the milling process may include milling the plurality of magnetic particles so a magnetic medium formed in the absence of an applied magnetic field exhibits a longitudinal squareness less than or equal to approximately 0.40.

Abstract: Magnetic storage media that include a multilayer structure are described. In general, the magnetic storage media include a substrate, an underlayer that includes a plurality of underlayer particles formed over the substrate, and a magnetic layer that includes a plurality of magnetic particles formed over the underlayer. The magnetic layer may define a saturated magnetization and thickness product less than or equal to approximately 1.00 memu per square centimeter, and the magnetic particles may be selected from the group consisting of magnetic platelet-shaped particles and magnetic particles with an aspect ratio less than or equal to approximately 1.5. In addition, the described magnetic storage media may exhibit minimal interlayer diffusion between the underlayer and magnetic layer. Reduced interlayer diffusion between different layers of a magnetic recording medium may result in an improved magnetic recording surface for recording and storing data.

Abstract: Producing magnetic-recording media includes providing a substrate and forming a plurality of functional layers over the substrate to provide a coated substrate adapted for recording. At least one of the layers of the magnetic-recording media is fluid jet printed as a printed layer. In some embodiments, the printed layer provides at least one of load-bearing functionality, head-cleaning functionality, adhesion-promoting functionality, reaction-promoting functionality, lubricating functionality, surface-cleansing functionality, magnetic-recording functionality, and edge-finishing functionality.

Abstract: A magnetic recording medium including a substrate, a magnetic side, and a backside. The substrate defines a first surface and a second surface opposite the first surface. The magnetic side is formed over the first surface of the substrate and defines a recording surface. The backside is coated on the second surface of the substrate and is configured to decrease embossment of the recording surface. The backside defines a backside surface opposite the substrate. The backside surface having a skew less than about 0.5 and a kurtosis less than about 4.0.

Abstract: The magnetic recording medium includes a non-magnetic substrate having a front surface and a back surface. Coated on the front surface of the substrate is a lower support layer, or sub-layer, and at least one magnetic upper layer which together comprise the front coating. The magnetic upper layer contains a primary magnetic particulate pigment and a binder system therefor. The topmost magnetic upper layer is compressed, yielding a dense coating, with less than 14% porosity, and has a thickness of from about 0.02 micron to about 0.3 micron. The lower support layer comprises a nonmagnetic or soft magnetic pigment particle, and a binder system therefor. A back coating is formed on the back surface of the substrate. The magnetic medium of the invention has fewer than 400 tape dropouts per square inch at a 60% threshold, and fewer than 30 dropouts per square inch at a 40% threshold.

Abstract: A multiple layer magnetic recording medium exhibiting a marked increase in skirt signal-to-noise ratios, and a method of manufacturing such magnetic recording medium including the steps of forming a lower support layer and a magnetic layer on the substrate; transporting the magnetic recording medium on a non-magnetic carrier in a transport direction; exposing the magnetic recording medium to a first magnetic field of up to about 2500 gauss when the average percent solids of the multiple layers is less than 40% collectively, and exposing the magnetic recording medium to at least one additional magnetic field of from about 3500 to about 7000 gauss as the magnetic recording medium continues to transport when the average percent solids of said multiple layers is from about 43% to about 60% collectively, wherein the magnetic pigment particles in said magnetic layer are oriented in a longitudinal direction.

Abstract: A multiple layer magnetic recording medium exhibiting a marked increase in skirt signal-to-noise ratios, and a method of manufacturing such magnetic recording medium including the steps of forming a lower support layer and a magnetic layer on the substrate; transporting the magnetic recording medium on a non-magnetic carrier in a transport direction; exposing the magnetic recording medium to a first magnetic field of up to about 2500 gauss when the average percent solids of the multiple layers is less than 40% collectively, and exposing the magnetic recording medium to at least one additional magnetic field of from about 3500 to about 7000 gauss as the magnetic recording medium continues to transport when the average percent solids of said multiple layers is from about 43% to about 60% collectively, wherein the magnetic pigment particles in said magnetic layer are oriented in a longitudinal direction.

Abstract: A method for producing a magnetic recording medium includes applying a non-magnetic back coat to a substrate, applying a magnetic front coat to the substrate, in-line calendering the coated substrate using opposed rolls, at least one of the rolls being a generally compliant roll, and off-line calendering the substrate using opposed, generally non-compliant rolls. The off-line calendering optionally includes steel-on-steel calendering and the method optionally includes only one off-line calendering pass and only one in-line calendering pass. Calendering the coated substrate optionally occurs using at least one nip, the calendering including calendering the coated substrate through a final nip including generally non-compliant rolls. Other methods, and magnetic recording media produced by such methods, also are disclosed.

Abstract: A magnetic medium consisting essentially of a cured compound derived from a low-molecular weight, phosphorylated, polyoxyalkyl polyol and an organic isocyanate compound. The binder may also include a vinyl polymer and/or a polyoxyalkyl polyol.

Abstract: The magnetizable layer of a magnetic recording medium which has a flexible polyester film base is better adhered to the film base and better resists abrasion if the film base is first subjected to electron-beam irradiation while passing through an inert atmosphere such as nitrogen.