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Patent Agency Ranking
公开(公告)号：JP2003162808A
公开(公告)日：2003-06-06
申请号：JP2002308495
申请日：2002-10-23
Applicant: EMTEC MAGNETICS GMBH
Inventor： SOEDER JENS , TRAUB HANSJOERG , KESKE JUERGEN , NEUMANN WOLFGANG , GENTER EDGAR
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium capable of being used as a master tape in a high-speed magnetic copying process and capable of introducing the production of many high-quality copy tapes. SOLUTION: The tape-like magnetic recording medium includes a flexible base material having the thickness of at least 15 μm and at least one magnetic layer disposed on one surface of the base material. The magnetic layer has the thickness of at least 3 μm, in which a fine magnetic powder is embedded in a polymer binder. Further, the magnetic layer has the surface porosity rate SSP of at least 80 cm 2 /cm 2 (where, SSP is the value of the product of thickness dM (cm) of the magnetic layer multiplied by a specific surface area (cm 2 /cm 3 ) of the magnetic layer calculated from the nitrogen absorption amount per unit volume by the BET method). The tape-like magnetic recording medium is used as the master tape in the magnetic copying process. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JPH11203659A
公开(公告)日：1999-07-30
申请号：JP29975598
申请日：1998-10-21
Applicant: EMTEC MAGNETICS GMBH
Inventor： WIEGEMANN HANS-BERTRAM , STEHLE PETER , TRAUB HANSJOERG , JAKUSCH HELMUT DR
Abstract: PROBLEM TO BE SOLVED: To provide a general-purpose magnetic recording medium having neither magnetic nor mechanical anisotropy, but being improved in wear resistance and having an excellent mechanical stability at the same time. SOLUTION: This medium is a magnetic recording medium which has at least two layers 9, 8 formed upper and lower, and the lower layer 8 contains acicular magnetic powder having a coercive force of 5-40 kA/m and magnetization of 20-70 nTm /g. While the layers are still in a wet state after they have been formed, they are subjected to a magnetic non-orientation processing of magnetic recording medium, and are made non-isotropic magnetically and mechanically. The magnetic recording medium thus manufactured is suitable for a floppy disk having a high storage capacity exceeding 100 Mbits.
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公开(公告)号：WO03038828A2
公开(公告)日：2003-05-08
申请号：PCT/EP0210973
申请日：2002-10-01
Applicant: EMTEC MAGNETICS GMBH , SCHELBLE JOSEF , TRAUB HANSJOERG , MUELLER STEFAN , SANDROCK JOHANNES
Inventor： SCHELBLE JOSEF , TRAUB HANSJOERG , MUELLER STEFAN , SANDROCK JOHANNES
CPC classification number: G11B5/714 , G11B5/70 , G11B5/7023
Abstract: The invention relates to a magnetic recording medium comprising a) a layer carrier, b) at least one lower non-magnetic layer which is applied to said carrier and comprises at least one binding agent, and c) an upper magnetic layer which is applied to the lower layer, and which, dispersed in at least one binding agent, comprises at least one magnetic metal pigment or metal alloy pigment having a passivating envelope. Said recording medium is characterised in that the upper magnetic layer has a maximum dry thickness of 300 nm; the magnetic metal pigment or metal alloy pigment has a maximum length I of 90 nm; and the length I' of the metal core, the length I of the pigment, and the shortest recording wavelength lambda for the magnetic recording on the medium follow the relation: I'/I#1-18/ lambda . At least the binding agent of the magnetic layer contains both chlorine and epoxy groups, or is free of chloride.
Abstract translation: 本发明涉及包含a）支撑的磁记录介质，b）至少一个施加到其降低包含至少一种粘合剂的非磁性层，以及c）被分散在至少一种粘合剂施加到下层上部磁性层的涂层， 包含具有Passivierungshülle至少一个磁性金属或金属合金颜料，其特征在于，所述上部磁性层具有在300nm以下的干厚度d; 磁性金属或金属合金颜料至多90纳米的总长度I，所述长度I'des金属芯，颜料的总长度l和用于在介质上的磁性记录下列关系服从最短记录波长为λ：I“/ I＃1-18 /λ并且其中至少含有磁性层如氯和环氧基团的粘合剂; 或不含氯化物。
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公开(公告)号：DE10153277A1
公开(公告)日：2003-05-08
申请号：DE10153277
申请日：2001-10-29
Applicant: EMTEC MAGNETICS GMBH
Inventor： SCHELBLE JOSEF , TRAUB HANSJOERG , MUELLER STEFAN , SANDROCK JOHANNES
Abstract: The invention relates to a magnetic recording medium comprising a) a layer carrier, b) at least one lower non-magnetic layer which is applied to said carrier and comprises at least one binding agent, and c) an upper magnetic layer which is applied to the lower layer, and which, dispersed in at least one binding agent, comprises at least one magnetic metal pigment or metal alloy pigment having a passivating envelope. Said recording medium is characterised in that the upper magnetic layer has a maximum dry thickness of 300 nm; the magnetic metal pigment or metal alloy pigment has a maximum length I of 90 nm; and the length I' of the metal core, the length I of the pigment, and the shortest recording wavelength lambda for the magnetic recording on the medium follow the relation: I'/I#1-18/ lambda . At least the binding agent of the magnetic layer contains both chlorine and epoxy groups, or is free of chloride.
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公开(公告)号：DE10152287A1
公开(公告)日：2003-04-30
申请号：DE10152287
申请日：2001-10-23
Applicant: EMTEC MAGNETICS GMBH
Inventor： SOEDER JENS , TRAUB HANSJOERG , KESKE JUERGEN , NEUMANN WOLFGANG , GENTER EDGAR
Abstract: Strip-like magnetic medium comprises a flexible support layer and a magnetic layer containing magnetic pigments in a polymer binder applied on the first side of the support layer. The magnetic layer has a thickness dM of at least 3 microns m and a specific surface porosity SFP of at least 80 cm /cm defined as the product of the specific nitrogen intake per volume element according to BET of the magnetic layer (in cm /cm ) and the layer thickness of the magnetic layer (in cm). Preferred Features: The SFP according to BET is at least 90 cm /cm . The support layer has a thickness of 15-30 microns m. The second side not supporting the magnetic layer has a roughness of 200-400 nm.
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