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1. 发明专利

JPH1197025A LITHIUM SECONDARY CELL 失效
公开(公告)号：JPH1197025A
公开(公告)日：1999-04-09
申请号：JP25391397
申请日：1997-09-18
申请人： HITACHI MAXELL , NITTO DENKO CORP
发明人： AKAHA NAOTO , NAGAI TATSU , ABE MASAO , YOSHII KEISUKE , OTANI AKIRA
IPC分类号： H01M4/62 , H01M4/13 , H01M10/05 , H01M10/052 , H01M10/0566 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a lithium secondary cell high in capacity by preventing positive electrode active material from being degraded, and reducing the content of conduction auxiliary material. SOLUTION: In this secondary cell, each sheet shaped positive electrode 1 and each sheet shaped negative electrode 2 are faced to each other by way of each separator 3 within organic electrolyte 4. In this case, the aforesaid positive electrode 1 is formed out of a conductive base body, positive electrode active material, and of a film containing binder, and furthermore, the aforesaid binder is composed of polytetrafluoroethylene, and of electron conductive polymer having properties for changing electrical resistance by doping/dedoping a reaction caused by ions within the organic electrolyte.

2. 发明专利

JPH11273662A Paste composition for positive electrode, its manufacture, positive electrode, and lithium secondary battery using the same 失效
标题翻译：用于积极电极的其它组合物，其制造方法，正电极和使用该电极的锂二次电池
公开(公告)号：JPH11273662A
公开(公告)日：1999-10-08
申请号：JP7413698
申请日：1998-03-23
申请人： Hitachi Maxell Ltd , Nitto Denko Corp , 日東電工株式会社 , 日立マクセル株式会社
发明人： AKAHA NAOTO , NAGAI TATSU , ABE MASAO , YOSHII KEISUKE , OTANI AKIRA
IPC分类号： H01M10/05 , H01M4/13 , H01M4/139 , H01M4/62 , H01M10/052 , H01M10/0566 , H01M4/02 , H01M4/04 , H01M4/58 , H01M10/40
CPC分类号： Y02E60/122 , Y02P70/54
摘要： PROBLEM TO BE SOLVED: To provide a paste composition for a positive electrode, capable of contributing to the improvement of load and cycle characteristics without deteriorating overdischarge characteristic.
SOLUTION: A paste composition for a positive electrode contains a positive electrode active material, a binder, and a solvent, the binder containing an electron-conducting polymer having the property of varying in electrical resistance through doping and undoping reactions using ions, and containing an electron conduction assistant by 0.2 to 4 wt.% of solids. A method for manufacturing the paste composition includes a first step process for obtaining an electron-conducting paste by mixing the binder with the electron conduction assistant and a second step process for mixing the positive electrode active material in the paste.
COPYRIGHT: (C)1999,JPO
摘要翻译：要解决的问题：提供一种用于正极的糊剂组合物，其能够有助于提高负载和循环特性，而不会降低过放电特性。解决方案：用于正极的糊剂组合物含有正极活性物质，粘合剂和溶剂，所述粘合剂含有通过使用离子的掺杂和去掺杂反应而具有变化的电阻的电子传导性聚合物，并且含有电子传导助剂为0.2〜4重量％的固体。糊料组合物的制造方法包括通过将粘合剂与电子传导助剂混合而获得电子传导性糊剂的第一工序，以及将正极活性物质混合在糊料中的第二工序。

3. 发明专利

JPH11354105A LITHIUM SECONDARY BATTERY AND ITS MANUFACTURE 失效
公开(公告)号：JPH11354105A
公开(公告)日：1999-12-24
申请号：JP16022998
申请日：1998-06-09
申请人： NITTO DENKO CORP , HITACHI MAXELL
发明人： URAIRI MASAKATSU , ABE MASAO , AKAHA NAOTO
IPC分类号： H01M10/05 , H01M4/13 , H01M4/139 , H01M4/62 , H01M10/052 , H01M10/0566 , H01M4/02 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a high-capacity lithium secondary battery by using polytetrafluoroethylene as a binder of a positive electrode active material, thereby improving the viscosity characteristic and film strength of its paint, and preventing the degradation of the positive electrode active material. SOLUTION: In relation to the manufacturing of a lithium battery composed by facing a sheet-like positive electrode 1 to a sheet-like negative electrode 2 through a separator 3 in an organic electrolyte 4, a feature of this manufacturing method are that when the sheet-like positive electrode 1 is produced, a diffused solution prepared by diffusing fine powder of polytetrafluoroethylene into a hydrocarbon solvent and a solution prepared by dissolving a polyolefin resin into a hydrocarbon solvent are mixed together, a paint is prepared by further mixing a positive electrode active material with it, the paint is applied to a conductive base and dried, and thus, a paint film containing a mixture of the positive electrode active material, the polytetrafluoroethylene as a binder and the polyolefin resin is formed on the conductive base.

4. 发明专利

JPH113709A MANUFACTURE OF LITHIUM SECONDARY BATTERY 失效
公开(公告)号：JPH113709A
公开(公告)日：1999-01-06
申请号：JP16812697
申请日：1997-06-10
申请人： HITACHI MAXELL
发明人： AKAHA NAOTO
IPC分类号： H01M4/62 , H01M4/139 , H01M10/05 , H01M4/02 , H01M4/04 , H01M10/40
摘要： PROBLEM TO BE SOLVED: To provide a high capacity lithium secondary battery for preventing the occurrence of coating film cracks and separation of the coating film from a conductive base body by enhancing adhesive strength of a sheet-like positive electrode coating film. SOLUTION: A lithium secondary battery is manufactured, which has a sheet- like positive electrode 1 in which a coating film containing a positive electrode active material, an electron conduction auxiliary agent and a binder is formed on a conductive base body, and in which the binder of the sheet-like positive electrode 1 contains resin or rubber soluble in at least polythetrafluoroethylene and an organic solvent. At least the electron conduction auxiliary agent excluding the positive electrode material is added to the aqueous dispersion of polytetrafluorothylene so as to be stirred and mixed in advance, then, the mixture is dried to prepare polytetrafluorothylene - containing powder. Coating prepared by adding at least the positive electrode active material and the organic solvent to the polytetrafluoroethylene - containing powder so as to be stirred and mixed is applied onto the conductive base body and is dried to manufacture the sheet-like positive electrode 1.

5. 发明专利

JPH0927113A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH0927113A
公开(公告)日：1997-01-28
申请号：JP19618895
申请日：1995-07-07
申请人： HITACHI MAXELL
发明人： AKAHA NAOTO , KUSADA HIDEO
IPC分类号： G11B5/70 , C09D5/23 , G11B5/842 , G11B5/845
摘要： PROBLEM TO BE SOLVED: To effectively prevent deterioration in recording and reproducing characteristics by controlling the squareness ratio SRm of a magnetic layer containing a magnetic powder formed on a substrate to >=0.75 and controlling the squareness ratio SRs of the surface layer of the magnetic layer to >=0.60 SRs. SOLUTION: By sealing a solvent 15 included in a magnetic coating material in the lower part of a vapor pressure controlling tank 10, the vapor pressure of the vapor 16 of the solvent 15 is maintained almost 100% during a nonmagnetic coating material and a magnetic coating material are applied to form a nonmagnetic layer 7 as a lower layer and a magnetic layer 8 as an upper layer in a duct 2. Therefore, during this process, the magnetic layer 8 which is formed by applying the magnetic coating material and is not dried can not be dried or semi-dried and the magnetic powder in the surface layer of the magnetic layer 8 is sufficiently oriented. Thus, deterioration in orientation in the surface layer of the magnetic layer of the produced magnetic recording medium is suppressed and deterioration in recording and reproducing characteristics of the magnetic recording medium can be effectively prevented.

6. 发明专利

JPH06111269A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH06111269A
公开(公告)日：1994-04-22
申请号：JP28055192
申请日：1992-09-25
申请人： HITACHI MAXELL
发明人： KUSUMOTO MASAHIDE , AKAHA NAOTO
IPC分类号： G11B5/66 , G11B5/64 , G11B5/73 , G11B5/738
摘要： PURPOSE:To reduce friction coefficient and to improved durability by providing a lubricant replenishment layer containing a lubricant and a solid additive with a specific hardness on a substrate film and then forming a ferromagnetic metal thinfilm layer with a spacing of specific width on it. CONSTITUTION:A lubricant paint, where a solid additive 5 of a Mohs hardness of 4 or higher which is subjected to hydrophobic treatment along with a lubricant is combined and dispersed along with a binder resin and an organic solvent, is applied onto a substrate film 1 and then is dried for forming a lubricant replenishment layer 2. Then, a ferromagnetic material is subjected to inclination deposition on the layer 2 for forming a ferromagnetic metal thin-film layer 3. In this case, a protruding part 51 of the additive 5 is formed on the surface of the layer 2 and a spacing 6 with a proper width is formed in the layer 3 on deposition. Then, by adjusting the particle diameter and the amount of constituent of the additive 5, the width of the spacing 6 is set to 1,000Angstrom or less and the number of particles within 1 mm is set to 1 or more, thus exuding the lubricant in the layer 2 via the spacing 6 for proper reinforcement and hence reducing friction coefficient, securing running stability, and improving durability.

7. 发明专利

JPH04247320A SURFACE FINISHING METHOD OF TAPE AND FINISHING DEVICE THEREOF 失效
公开(公告)号：JPH04247320A
公开(公告)日：1992-09-03
申请号：JP3373991
申请日：1991-02-01
申请人： HITACHI MAXELL
发明人： AKAHA NAOTO
IPC分类号： G11B5/84
摘要： PURPOSE:To uniformly finish the surface of a tape by running the tape on a sliding member having an edge constituted of adjacent faces and controlling the contact pressure of the tape and the edge of the sliding member according to the displacement of a sliding-contact surface. CONSTITUTION:A laser displacement meter 27 is connected to an electronic device 28 for the displacement meter and the displacement of the sliding-contact surface during the time when the tape 4 comes into sliding contact with the edge 16 of the sliding member 15 is detected by a prescribed program. A change in the displacement quantity with time is recorded by a recorder 29. A tape traveling controller 30 controls the contact pressure of the tape 4 with the edge 16 of the sliding member 15 to a constant pressure according to the displacement of the sliding-contact surface. The surface of the tape 4 is finished by this constant contact pressure and the surface of the tape 4 is uniformly finished regardless of the wear of the edge 16 of the sliding member 15.

8. 发明专利

JPH03245036A METHOD AND APPARATUS FOR TESTING FRICTIONAL FORCE AND FRICTIONAL BEHAVIOR OF TAPE AND CYLINDER 失效
公开(公告)号：JPH03245036A
公开(公告)日：1991-10-31
申请号：JP4285390
申请日：1990-02-22
申请人： HITACHI MAXELL
发明人： AKAHA NAOTO
IPC分类号： G01N3/56 , G01L5/00 , G01N3/00 , G01N3/06 , G01N19/02 , G11B5/84
摘要： PURPOSE:To conduct a test including a means for judging the pass or fail of lubrication on the surface of tape highly accurately by winding the tape around a rotating cylinder, fixing one end of the tape through an elastic body having a specified spring constant, and applying a constant tensile force on the other end. CONSTITUTION:Video tape 1 is wound around the outer surface of a cylinder 2 so that the side of the magnetic layer is in contact with the surface. Cloudy tape 3 is connected to one end of the tape 1. The tape 3 is connected and fixed to a spring 4 whose spring constant is 100 g/mm or less and which is connected to a fixing end 5. Constant tensile force is applied with a weight 6 to the other end of the tape 1. Then, the cylinder 2 is rotated and driven. Light is projected from a light source system 6 to a suitable region including the connecting part of the tapes 1 and 3. The image of the transmitted and scattered light is projected on an image sensing system 8. The displacement of the tape 1 is obtained based on the ratio between the bright part of the tape 3 and the dark part of the tape 1. Thus the frictional force and the frictional behavior are tested.

9. 发明专利

JPS6478694A METHOD AND DEVICE FOR CUTTING RAW FILM CONSISTING OF PLASTIC FILM AS BASE MATERIAL 失效
公开(公告)号：JPS6478694A
公开(公告)日：1989-03-24
申请号：JP23568987
申请日：1987-09-19
申请人： HITACHI MAXELL
发明人： AKAHA NAOTO
IPC分类号： G11B5/84 , B23K26/38 , B23K26/40
摘要： PURPOSE:To improve the accuracy of cutting a raw film consisting of a plastic film by running the raw film continuously along the peripheral face of a guide roll, then projecting a laser beam onto the raw film, thereby cutting the raw film. CONSTITUTION:The raw plastic film 11 is continuously run along the rotationally driven guide drum 10. The rotation of the drum 10 is controlled at the circumferential speed coinciding with the traveling speed of the raw film 11 and the film 11 is wound about 30 times around the peripheral face of the drum 10. Convergent light beams 8, 9 of the laser beam 2 are projected onto the film 11 traveling a considerable speed and the projected spot surfaces 12, 13 are instantaneously converted to plasma and are cut at a high temp. of several hundreds-several thousands deg.C. The thermal damages of the spot surfaces 12, 13 are prevented by the cooling effect of the drum 10 at this time, by which the accuracy of cutting the film 11 is improved.

10. 发明专利

JPS63255824A DEVICE FOR CUTTING RAW SHEET OF MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS63255824A
公开(公告)日：1988-10-24
申请号：JP8912687
申请日：1987-04-11
申请人： HITACHI MAXELL
发明人： AKAHA NAOTO
IPC分类号： G11B5/84
摘要： PURPOSE:To permit efficient cutting by guiding the laser beam from a laser oscillator through laser light paths constituted of optical fibers to laser light projecting sections and projecting the laser beam to a traveling raw sheet of a magnetic recording medium. CONSTITUTION:Many pieces of processing heads 3 are installed slidably to a sliding guide bar 5 and are arrayed in the direction perpendicular to the shearing direction of the raw sheet 7 of the magnetic recording medium. The laser beams guided from the laser oscillator 1 to a light wave front dividing device 2 and branched by a half mirror built therein are guided to these heads 3 respectively by using the optical fibers 6. The cutting with high accuracy is thereby easily executed even if the cutting width is about 10mm in the case of cutting plural pieces of tapes simultaneously from the broad raw sheet of the magnetic recording medium. Constitution of the adjusting mechanism of high accuracy to a smaller device is thus permitted without giving any restriction at all to the spaces in the laser light paths.

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