4results about "Linear tape open format" patented technology

The magnetic recording medium contains one or more polymers selected from the group consisting of a polymer P and a polymer Q in a portion on the non-magnetic support on the magnetic layer side. R1 represents a monovalent aromatic group or a monovalent hydrocarbon group having 6 or more carbon atoms and L1 represents a single bond or a divalent group. R2 represents a monovalent polar group and L2 represents a single bond or a divalent group. R3 represents a monovalent aromatic group or a monovalent hydrocarbon group having 6 or more carbon atoms, L3 represents a single bond or a divalent group, and R11 represents an alkyl group. R4 represents a monovalent polar group, L4 represents a single bond or a divalent group and R12 represents an alkyl group.

To provide a magnet tape which may contribute to operational stability improvement of a drive during recording and / or reproduction after prolonged storage.SOLUTION: A magnetic tape comprising a non-magnetic support body and a magnetic layer containing ferromagnetic powder, a magnetic tape cartridge comprising the magnetic tape, and a magnetic tape device are provided. In a binarized image of a secondary electronic image obtained by imaging a surface of the magnetic layer using a scanning electron microscope at an acceleration voltage of 5 kV, the number of bright regions with circle-equivalent diameters of 60 nm to less than 120 nm, is 8000 to 30000, inclusive. A standard deviation σ of the number of bright regions in a width direction of the surface of the magnetic layer is 2000 or less.SELECTED DRAWING: None

The present invention provides a magnetic recording medium that exhibits a low coefficient of friction after repeated use. [Solution] A magnetic recording medium having a non-magnetic support and a magnetic layer containing ferromagnetic powder contains one or more polymers selected from the group consisting of polymers containing at least one structural unit represented by formulas S-1 and S-2, and polymers containing at least one structural unit represented by a predetermined formula, in the portion of the non-magnetic support on the magnetic layer side. TIFF2026049820000016.tif60170

Provided are a magnetic recording medium and a magnetic recording cartridge. An average thickness of the magnetic recording medium tT is tT≤5.3 μm, a ratio (A2 / A1) of an average creep slope A2 at a temperature of 32° C. and a humidity of 80% RH to an average creep slope A1 at a temperature of 32° C. and a humidity of 20% RH is 1.440 or less, and a ratio (Tan δ2 / Tan δ1) of an average Tan δ2 at a temperature of 32° C. and a humidity of 80% RH to an average Tan δ1 at a temperature of 32° C. and a humidity of 20% RH is less than 1.2100. The magnetic recording cartridge includes the magnetic recording medium, a memory and a case that accommodates the magnetic recording medium and the memory.