MAGNETIC RECORDING MEDIUM

• Main Authors: OHASHI RYOJI, NAKAMURA MINORU
• Format: Patent
• Language: English
• Published: 07.09.1993
• Subjects: ADHESIVES; BOOK COVERS; BOOKBINDING; CALCULATING; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPUTING; CORRECTING FLUIDS; COUNTING; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; DYES; FILES; FILLING PASTES; HANDLING RECORD CARRIERS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INKS; LOOSE LEAVES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MOVABLE-STRIP WRITING OR READING APPARATUS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; PHYSICS; POLISHES; PRESENTATION OF DATA; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; RECOGNITION OF DATA; RECORD CARRIERS; SPECIAL PRINTED MATTER; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

PURPOSE:To enhance the color forming properties of a printing layer and to enable accurate and stable recording and reproduction by laminating a magnetic layer, a soft magnetic material layer with a thickness of 1-8mum and a printing layer on a non-magnetic support. CONSTITUTION:A magnetic layer 2, a soft magnetic material layer 3 and a printing layer 4 are successively laminated on a support 1 and the thickness of the soft magnetic material layer 3 is set to 1-8mum to form a magnetic recording medium. As a concrete example of the support 1, there is synthetic paper or a polyester film. The magnetic layer 2 is formed by coating the support with magnetic paint containing a magnetic powder such as gamma-Fe2O3 or barium ferrite, a binder resin and a solvent and drying the coating layer. The soft magnetic material layer 3 is formed by coating the magnetic layer 2 with paint containing a soft magnetic material powder being ferrite particles such as nickel or manganese, a binder resin and a solvent and drying the coating layer. A transfer magnetic recording medium can be obtained by laminating a release layer, the printing layer, the soft magnetic material layer, the magnetic layer and an adhesive layer on the support.