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公开(公告)号：DE4233999A1
公开(公告)日：1994-04-14
申请号：DE4233999
申请日：1992-10-09
Applicant: BASF MAGNETICS GMBH
Inventor： LATZEL WERNER DR , ENGELHARDT PETER , RUDOLF PETER DR , SCHWARZ LOTHAR , HEILMANN PETER DR , ROLLER HERMANN , LEHNER AUGUST
Abstract: Magnetic recording media with a coating on the reverse side is produced, consisting of a non-magnetic substrate, a magnetic coating on the main side, and, on the other side, a coating made up of a polymer binder, non-magnetic fillers, pigments, dispersing agents and other usual additives. The material for this reverse coating is produced by separately mixing the various solid particles and additives with part of a solution of the binder so as to coat the particles with the organic substances concerned; this mix is next dispersed by means of a ball mill, metered quantities of the dispersion obtained plus the remaining solution of binder are then intensively mixed in a toothed colloid mill against the direction of feed before being applied to the reverse side of the sheeting. ADVANTAGE - The method produces stable dispersions from a wide variety of solid materials. It does so with a high space-time output. Existing types of dispersion can be used without increasing the quantity of dispersion agent. It improves the fault count in the reverse side layer and hence improves the recording quality of the medium.
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Patent Agency Ranking
公开(公告)号：DE4216847A1
公开(公告)日：1993-11-25
申请号：DE4216847
申请日：1992-05-21
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , ENGELHARDT PETER , BAUR REINHOLD DR , BOBRICH MICHAEL DR , LATZEL WERNER DR , LENZ WERNER DR , SUETTINGER RUDOLF DR
Abstract: The invention relates to flexible magnetic recording carriers essentially comprising a sheet-like (web-like) nonmagnetic substrate, a magnetic layer applied to the first main side of the sheet-like substrate, and a backing layer formed on the opposite main side of the substrate from a polymeric binder and nonmagnetic fillers and supporting pigments, where the backing layer contains a precipitation silicic acid (silica) coated on the surface with a phosphate group-containing polyurethane.
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公开(公告)号：DE4117980A1
公开(公告)日：1992-12-03
申请号：DE4117980
申请日：1991-05-31
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , HEILMANN PETER DR , HITZFELD MICHAEL DR , STOCKBURGER DIETER DR , LATZEL WERNER DR , BAUR REINHOLD DR , ENGELHARDT PETER , ROTHFUSS EDWIN , GRAU WERNER DR , LENZ WERNER DR
IPC: C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735
Abstract: The invention relates to flexible magnetic recording supports (media) which are essentially composed of a sheet-type nonmagnetic substrate, a magnetic layer applied to one principal side of the sheet-type substrate and a back layer formed on the opposite principal side of the substrate and composed of a polymeric binder, at least one filler, at least one auxiliary pigment and polyolefin particles having a spherical shape.
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公开(公告)号：DE19531313A1
公开(公告)日：1997-02-27
申请号：DE19531313
申请日：1995-08-25
Applicant: BASF MAGNETICS GMBH
Inventor： KOHL ALBERT , ROEMER KARL-HEINZ , LATZEL WERNER DR , HEILMANN PETER DR , HITZFELD MICHEAL DR
Abstract: A heat sealing sheet comprises a flexible substrate and heat sealing layer of organic polymers. In this novel combination, the coating layer (1,2) contains at least two incompatible thermoplastic binders. An amorphous binder (2), consisting of finely-divided spheres, is surrounded by a layer (1) of thermoplastic binder of higher crystallinity with a narrow range of softening temperature. Considering the spherical component (2), its glass transition temperature Tg is greater than that of the higher crystallinity (1) component but less than its m.pt. Tm. The spherical component (2) forms dome-shaped projections on the open surfaces of the coating (1, 2). Also claimed is a magnetic transfer band or tape. This consists of a flexible layer substrate (4) with at least one separable magnetic recording layer (3) and a covering layer (1, 2), pref. formed by a heat sealed layer formed as described.
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公开(公告)号：DE59304159D1
公开(公告)日：1996-11-21
申请号：DE59304159
申请日：1993-05-13
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , ENGELHARDT PETER , BAUR REINHOLD DR , BOBRICH MICHAEL DR , LATZEL WERNER DR , LENZ WERNER DR , SUETTINGER RUDOLF DR
Abstract: The invention relates to flexible magnetic recording carriers essentially comprising a sheet-like (web-like) nonmagnetic substrate, a magnetic layer applied to the first main side of the sheet-like substrate, and a backing layer formed on the opposite main side of the substrate from a polymeric binder and nonmagnetic fillers and supporting pigments, where the backing layer contains a precipitation silicic acid (silica) coated on the surface with a phosphate group-containing polyurethane.
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公开(公告)号：DE59203265D1
公开(公告)日：1995-09-21
申请号：DE59203265
申请日：1992-05-13
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , HEILMANN PETER DR , HITZFELD MICHAEL DR , STOCKBURGER DIETER DR , LATZEL WERNER DR , BAUR REINHOLD DR , ENGELHARDT PETER , ROTHFUSS EDWIN , GRAU WERNER DR , LENZ WERNER DR
IPC: C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/704
Abstract: The invention relates to flexible magnetic recording supports (media) which are essentially composed of a sheet-type nonmagnetic substrate, a magnetic layer applied to one principal side of the sheet-type substrate and a back layer formed on the opposite principal side of the substrate and composed of a polymeric binder, at least one filler, at least one auxiliary pigment and polyolefin particles having a spherical shape.
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