Minnesota Mining and Manufacturing Company

Imation Corporation

Subodh K Kulkarni

Gary Lee Huelsman

John C Dahlquist

W Blake Kolb

Jeffrey C Chang

John J Stofko, Jr

Omar Farooq

Mohammad Iqbal

David W Tweeten

Robert M Henry

Robert E Martinson

A magnetic recording tape exhibits reduced magnetic flux modulation and improved signal-to-noise ratio. Providing a magnetic recording layer with a more uniform thickness can improve the magnetic flux modulation characteristic. For example, the magnetic recording tape may have a coercivity of greater than or equal to 2000 Oe with a magnetic flux modulation characteristic having a one sigma standard deviation of less than 0.06. In some cases, the magnetic flux modulation characteristic may have a one sigma standard deviation of less than 0.05, or even 0.04. Reduced magnetic flux modulation can support increased storage densities.

Magnetic tape recording system having tape with defined remanent magnetization

A magnetic recording medium exhibits reduced magnetic flux modulation and improved signal-to-noise ratio. The magnetic recording medium may take the form of a magnetic tape or a magnetic disk. Providing a magnetic recording layer with a more uniform thickness can improve the magnetic flux modulation characteristic. For example, the magnetic recording medium may have a coercivity of greater than or equal to 2000 Oerstads with a magnetic flux modulation characteristic having a one sigma standard deviation of less than 0.06. In some cases, the magnetic flux modulation characteristic may have a one sigma standard deviation of less than 0.05, or even 0.04. Reduced magnetic flux modulation can support increased storage densities.

Magnetic recording medium

The performance of phosphor screens can be improved by adding an antistatic agent into the protective topcoat of the radiographic screen when the antistatic agent preferably comprises a fluorocarbon or silicone antistatic agent. These antistatic agents are particularly useful where the screen is made by coating phosphor dispersion/mixture onto a substrate while the dispersion/mixture contains less than 5% by weight of polymerizable components with a molecular weight less than 300, preferably with less than 5% by weight of polymerizable components having molecular weights less than 500, and a topcoat contains the antistatic agent. Formation of the antistatic topcoat is preferably formed by inclusion of the antistatic agent into the polymerizable composition and allowing the antistatic agent to migrate to the surface of the composition during polymerization to form a layer consisting essentially of the antistatic agent. The polymerizable composition should be photopolymerizable, and other components within the coating to be photohardened which have molecular weights below 300 or 500 should likewise be kept to less than 5% by weight of the composition.

Radiographic intensifying screen with antistat

A cellulose polymer network crosslinked with metal ions selected from the group consisting of: Al.sup.+3, Zr.sup.+4, and Ti.sup.+4, the crosslinked cellulose polymer network having incorporated therein a colloidal sol containing metal oxide-hydroxide particles wherein the metal is Al, Zr, or Ti. The inventive material is optically clear and can be used to cast microporous films, either supported or unsupported, which are useful as coatings on ink jet recording materials.

Crosslinked cellulose polymer/colloidal sol matrix and its use with ink

Method for the manufacture of a radiographic intensifying screen with

A water-based transparent image-receptive layer suitable for imaging in a thermal printer, and in electrophotographic or xerographic copiers, comprising a mixture of from about 5 parts to about 30 parts of at least one amino based silane coupling agent having the general formula: ##STR1## wherein Q is selected from the group consisting of primary, secondary and tertiary amino groups; R is selected from aliphatic and aromatic groups; R.sub.1 is selected from the group consisting of alkyl and aryl groups, and n is 1 or 2; from about 60 parts to about 80 parts of basic colloidal particles; from about 10 to about 29.9 parts of a water-dispersible polymeric binder, and from about 0.1 part to about 5 parts of an antiblocking agent.

Growing community of inventors

Woodbury, MN, United States of America

Subodh K Kulkarni