-
公开(公告)号：DE59804282D1
公开(公告)日：2002-07-11
申请号：DE59804282
申请日：1998-03-20
Applicant: EMTEC MAGNETICS GMBH
Inventor： GOETZ KLAUS , JAKUSCH DR , LOCH DR , HOFFMANN ERICH , GOTTMANN HANS-GEORG , JENOR HANS-JOACHIM , VOIT DR
Abstract: In a magnetic recording carrier having two magnetic layers, in which the upper layer contains a cobalt-containing FeOx (x = 1.33 to 1.5) magnetic pigment with a higher BET value than that of the lower layer magnetic pigment, the thicknesses of the upper and lower layers (3, 2) are 3.1-5 mu m and 1.1-3 mu m, respectively. Preferably, the coercive field strengths of the upper and lower layers are 55-60 kA/m and 50-55 kA/m respectively or, when the magnetic pigment of the lower layer is CrO2, the coercive field strength of the lower layer is 40-55 kA/m.
-
公开(公告)号：BR9913471A
公开(公告)日：2001-06-05
申请号：BR9913471
申请日：1999-07-24
Applicant: EMTEC MAGNETICS GMBH
Inventor： ILMER ANDREAS , LENZ WERNER , KRESS RIA , HEILMANN PETER , JAKUSCH HELMUT , HOFFMANN ERICH , VEITCH RONALD
Abstract: Digital recording procedures wherein the recording support is not exposed to an obliterating magnetic field before recording are known in recent times. Such recording supports must therefore have good rewrite capability. It has been found that said requirement is fulfilled by two-layered recording supports, wherein the top layer contains a metal or metal alloy powder and has a density of less than 0.3 mu m and wherein the bottom layer contains a magnetic pigment. The coercitive force of the bottom layer has at the most two thirds the coercitive force of the top layer and the remanent magnetization of the bottom layer is at least 32 kA/m.
-
公开(公告)号：DE19714161A1
公开(公告)日：1998-10-08
申请号：DE19714161
申请日：1997-04-05
Applicant: EMTEC MAGNETICS GMBH
Inventor： GOETZ KLAUS DIPL ING , GOTTMANN HANS-GEORG , HOFFMANN ERICH , JAKUSCH HELMUT DR , JENOR HANS-JOACHIM , LOCH WERNER DR , VOIT JOHANN DR
Abstract: In a magnetic recording carrier having two magnetic layers, in which the upper layer contains a cobalt-containing FeOx (x = 1.33 to 1.5) magnetic pigment with a higher BET value than that of the lower layer magnetic pigment, the thicknesses of the upper and lower layers (3, 2) are 3.1-5 mu m and 1.1-3 mu m, respectively. Preferably, the coercive field strengths of the upper and lower layers are 55-60 kA/m and 50-55 kA/m respectively or, when the magnetic pigment of the lower layer is CrO2, the coercive field strength of the lower layer is 40-55 kA/m.
-
Patent Agency Ranking
公开(公告)号：AU756079B2
公开(公告)日：2003-01-02
申请号：AU5506899
申请日：1999-07-24
Applicant: EMTEC MAGNETICS GMBH
Inventor： ILMER ANDREAS , LENZ WERNER , KRESS RIA , HEILMANN PETER , VEITCH RONALD , JAKUSCH HELMUT , HOFFMANN ERICH
Abstract: Digital recording procedures wherein the recording support is not exposed to an obliterating magnetic field before recording are known in recent times. Such recording supports must therefore have good rewrite capability. It has been found that said requirement is fulfilled by two-layered recording supports, wherein the top layer contains a metal or metal alloy powder and has a density of less than 0.3 mu m and wherein the bottom layer contains a magnetic pigment. The coercitive force of the bottom layer has at the most two thirds the coercitive force of the top layer and the remanent magnetization of the bottom layer is at least 32 kA/m.
-
公开(公告)号：AU5506899A
公开(公告)日：2000-03-21
申请号：AU5506899
申请日：1999-07-24
Applicant: EMTEC MAGNETICS GMBH
Inventor： ILMER ANDREAS , LENZ WERNER , KRESS RIA , HEILMANN PETER , VEITCH RONALD , JAKUSCH HELMUT , HOFFMANN ERICH
Abstract: Digital recording procedures wherein the recording support is not exposed to an obliterating magnetic field before recording are known in recent times. Such recording supports must therefore have good rewrite capability. It has been found that said requirement is fulfilled by two-layered recording supports, wherein the top layer contains a metal or metal alloy powder and has a density of less than 0.3 mu m and wherein the bottom layer contains a magnetic pigment. The coercitive force of the bottom layer has at the most two thirds the coercitive force of the top layer and the remanent magnetization of the bottom layer is at least 32 kA/m.
-
公开(公告)号：DE19838799A1
公开(公告)日：2000-03-02
申请号：DE19838799
申请日：1998-08-26
Applicant: EMTEC MAGNETICS GMBH
Inventor： ILMER ANDREAS , LENZ WERNER , KRESS RIA , HEILMANN PETER , VEITCH RONALD , JAKUSCH HELMUT , HOFFMANN ERICH
Abstract: Digital recording procedures wherein the recording support is not exposed to an obliterating magnetic field before recording are known in recent times. Such recording supports must therefore have good rewrite capability. It has been found that said requirement is fulfilled by two-layered recording supports, wherein the top layer contains a metal or metal alloy powder and has a density of less than 0.3 mu m and wherein the bottom layer contains a magnetic pigment. The coercitive force of the bottom layer has at the most two thirds the coercitive force of the top layer and the remanent magnetization of the bottom layer is at least 32 kA/m.
-
公开(公告)号：NO974467L
公开(公告)日：1997-11-26
申请号：NO974467
申请日：1997-09-26
Applicant: EMTEC MAGNETICS GMBH
Inventor： LEHNER AUGUST , JAKUSCH HELMUT , KOCH VOLKER , OHLINGER MANFRED , KOHL ALBERT , LENZ WERNER , SCHNEIDER NORBERT , HEILMANN PETER , VEITCH JOHN RONALD , HOFFMANN ERICH , HUEBNER WERNER , JACHOW HARALD , LEHNERT RUDI
IPC: B32B33/00 , C01G37/02 , B32B27/20 , G11B5/708 , G11B5/73 , G11B5/733 , G11B5/738 , G11B5/78 , G11B5/704
Abstract: Tape-like magnetic recording media having a nonmagnetic substrate and at least one layer applied to the substrate having incorporated into at least one of these layers, an inorganic needle-shaped pigment which serves as a supporting pigment and has a ratio of the average length to the average diameter of the pigment of at least 3, and the mean modulus of elasticity of the layers is not less than 15 Gpa in the longitudinal direction of the tape-like recording media.
-
公开(公告)号：NO974467D0
公开(公告)日：1997-09-26
申请号：NO974467
申请日：1997-09-26
Applicant: EMTEC MAGNETICS GMBH
Inventor： LEHNER AUGUST , JAKUSCH HELMUT , KOCH VOLKER , OHLINGER MANFRED , KOHL ALBERT , LENZ WERNER , SCHNEIDER NORBERT , HEILMANN PETER , VEITCH JOHN RONALD , HOFFMANN ERICH , HUEBNER WERNER , JACHOW HARALD , LEHNERT RUDI
IPC: B32B33/00 , B32B27/20 , C01G37/02 , G11B5/708 , G11B5/73 , G11B5/733 , G11B5/738 , G11B5/78 , C11B
Abstract: Tape-like magnetic recording media having a nonmagnetic substrate and at least one layer applied to the substrate having incorporated into at least one of these layers, an inorganic needle-shaped pigment which serves as a supporting pigment and has a ratio of the average length to the average diameter of the pigment of at least 3, and the mean modulus of elasticity of the layers is not less than 15 Gpa in the longitudinal direction of the tape-like recording media.
-
-
-
-
-
-
-
Search Results
18
records
(took 0.021 seconds)
