公开(公告)号：MX9604967A

公开(公告)日：1998-02-28

申请号：MX9604967

申请日：1995-04-18

Applicant: SAINT GOBAIN NORTON IND CERAMI ,  CORP

Inventor： KWON OH-HUN

IPC: G11B05/84 ,  G11B05/704

Abstract: Esta invencion se refiere a un substrato para disco para su uso en una unidad de disco, este substrato para disco consiste esencialmente de zirconia parcialmente estabilizada y tiene una aspereza de superficie (Ra) de no más de 10 angstroms.

公开(公告)号：EP0182287A3

公开(公告)日：1987-10-07

申请号：EP85114473

申请日：1985-11-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Nakamura, Hiroki c/o K.K. Toshiba ,  Yamada, Takashi c/o K.K. Toshiba ,  Ouchi, Yoshiaki c/o K.K. Toshiba

IPC: G11B05/64 ,  G11B05/704

CPC classification number: G11B5/73 ,  Y10T428/31681 ,  Y10T428/31688 ,  Y10T428/31721 ,  Y10T428/31725

Abstract: There are disclosed a perpendicular magnetic recording medium comprising a substrate of a polymer film containing 0.7% by weight or less of a residual solvent and a ferromagnetic alloy layer formed on the substrate and a method for preparing the same comprising the steps of heating a substrate composed of a polymer film containing a residual solvent in order to regulate a content of the solvent existing in the substrate to 0.7% by weight or less; and afterward forming a magnetic layer composed of a ferromagnetic alloy on the substrate. The perpendicular magnetic recording medium of the present invention has a prolonged durability and heightened reliability.

公开(公告)号：EP0147161A3

公开(公告)日：1987-07-01

申请号：EP84308853

申请日：1984-12-18

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

Inventor： Renalls, Brenda L. c/o Minnesota Mining and ,  Pedrotty, Douglas G. c/o Minnesota Mining and ,  Donlan, John F. c/o Minnesota Mining and

IPC: G11B05/704

CPC classification number: G11B5/7305 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/24405 ,  Y10T428/25 ,  Y10T428/30 ,  Y10T428/31786

Abstract: A magnetic recording medium has a biaxially-oriented polyester film base which includes carbon black beads having a median diameter from 50 to 500 nm and is substantially free from beads or agglomerates more than 5 micrometers in diameter. The beads provide opacity such as is often required of the flexible recording disk of a diskette. The film base may be either a single layer, throughout which the beads are uniformly dispersed, or it may be multi-layer, e.g., a central containing the carbon black beads and two surface layers which are free from the beads.

公开(公告)号：WO1994018672A1

公开(公告)日：1994-08-18

申请号：PCT/US1994001331

申请日：1994-02-07

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY ,  TSUKAMOTO, Yoji ,  OIRI, Shigeto ,  OHTA, Toshio

Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY

IPC: G11B05/704

CPC classification number: G11B5/738

Abstract: A high recording density magnetic recording medium including a non-magnetic base film, a magnetic layer, and an undercoat layer provided therebetween. The undercoat layer includes non-magnetic particles, a binder resin, and a lubricant. The non-magnetic particles comprise (1) a non-magnetic iron oxide with an acicular ratio ranging from 5 to 10 and a long axis length ranging from 0.05 to 0.3 mu m, and (2) a carbon black having a structure constitution, and the weight ratio between said non-magnetic iron oxide and said carbon black is within the range between 85/15 and 99/1.

Abstract translation: 包括非磁性基膜，磁性层和底涂层的高记录密度磁记录介质。 底涂层包括非磁性颗粒，粘合剂树脂和润滑剂。 非磁性粒子包括（1）针状比范围为5〜10，长轴长度为0.05〜0.3μm的非磁性氧化铁，（2）具有结构构成的炭黑，以及 所述非磁性氧化铁和所述炭黑的重量比在85/15至99/1之间。

公开(公告)号：WO1993020553A1

公开(公告)日：1993-10-14

申请号：PCT/JP1993000422

申请日：1993-04-02

Applicant: TEIJIN LIMITED ,  CHUUJOU, Takao ,  KOBAYASHI, Ieyasu ,  HAMANO, Hisashi ,  ETCHU, Masami

Inventor： TEIJIN LIMITED

IPC: G11B05/704

CPC classification number: C08J5/18 ,  B29C55/005 ,  B29K2067/00 ,  C08J2367/02 ,  G11B5/73 ,  G11B5/7305 ,  G11B5/825 ,  Y10S428/90 ,  Y10S428/91 ,  Y10T428/24372 ,  Y10T428/25 ,  Y10T428/26 ,  Y10T428/31786

Abstract: A biaxially oriented base film made from polyethylene 2,6-naphthalenedicarboxylate and a floppy disk for high-density magnetic recording made from the film. The film and the disk are characterized in that the vibration of the film surface is suppressed so as to enable the contact with a magnetic head under given conditions even at a high rotational speed and that they have an excellent viscoelasticity.

Abstract translation: 由聚2,6-萘二甲酸乙二醇酯制成的双轴取向基膜和由该膜制成的高密度磁记录软盘。 膜和盘的特征在于，抑制膜表面的振动，使得能够在给定条件下甚至在高旋转速度下与磁头接触，并且它们具有优异的粘弹性。

公开(公告)号：EP0152329A3

公开(公告)日：1988-07-20

申请号：EP85400139

申请日：1985-01-28

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE

Inventor： Lazzari, Jean-Pierre

IPC: H01F10/30 ,  G11B05/704 ,  G11B05/64

CPC classification number: G11B5/7325

公开(公告)号：EP0135774A3

公开(公告)日：1987-04-08

申请号：EP84109720

申请日：1984-08-16

Applicant: Hitachi Maxell Ltd. ,  SAKAI CHEMICAL INDUSTRY CO., LTD.,

Inventor： Andoh, Haruo ,  Matsumoto, Seiji

IPC: G11B05/714 ,  G11B05/704 ,  G11B05/712

CPC classification number: G11B5/714 ,  G11B5/70652 ,  G11B5/712 ,  Y10S428/90 ,  Y10T428/256

Abstract: A magnetic recording medium comprising a nonmagnetic support and a magnetic layer provided thereon, said magnetic layer comprising a magnetic recording element and a binder, characterized in that said magnetic recording element mainly comprises acicular gamme-Fe 2 O 3 , particles having a porosity of not more than 5% by volume in average, a specific surface area of 24 to 30 m'/g and the intensity at the face (210) to that at the face (311) in the X ray diffraction being not more than 5%, said magnetic recording medium being much improved in electromagnetic conversion characteristics such as sensitivity and noise.

公开(公告)号：EP0152265A3

公开(公告)日：1985-10-30

申请号：EP85300764

申请日：1985-02-05

Applicant: Toyo Boseki Kabushiki Kaisha ,  Kabushiki Kaisha Nippon Magphane

Inventor： Kuze, Katsuaki ,  Nishino, Yasuhiro ,  Matsuyama, Yujiro ,  Maeda, Kozo ,  Kobayasi, Masahiro ,  Okudaira, Tadashi ,  Hongo, Tsuyoshi ,  Makimura, Osamu

IPC: C08J05/18 ,  G11B05/704 ,  G11B05/64

CPC classification number: C08K3/26 ,  C08J5/18 ,  C08J2367/02 ,  C08K3/22 ,  C08K3/36 ,  G11B5/733 ,  Y10S428/90 ,  Y10S428/91 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/258 ,  Y10T428/259 ,  Y10T428/31786 ,  C08L67/02

Abstract: An oriented polyester film comprising a polyester derived from ethylene terephthalate as the major monomeric unit; from 0.01 to 1.0% by weight of silica and/or titanium dioxide particles having an average size of 0.01 to 0.5 µm; and from 0.005 to 1.0% by weight of calcium carbonate particles having an average particle size of 0.01 to 0.5 µm. It can be used as the base film for a video tape.

公开(公告)号：EP0164518A3

公开(公告)日：1988-07-27

申请号：EP85104283

申请日：1985-04-09

Applicant: HOECHST AKTIENGESELLSCHAFT

Inventor： Hensel, Hartmut, Dr. ,  Monzer, Helmut

IPC: G11B05/704 ,  B32B27/36 ,  G11B05/64 ,  G11B05/848

CPC classification number: B32B27/36 ,  B32B7/02 ,  B32B27/18 ,  B32B2250/244 ,  B32B2367/00 ,  B32B2429/02 ,  B32B2551/00 ,  Y10S428/91 ,  Y10T428/31786 ,  Y10T428/31794

公开(公告)号：EP0158961A3

公开(公告)日：1988-07-06

申请号：EP85104284

申请日：1985-04-09

Applicant: HOECHST AKTIENGESELLSCHAFT

Inventor： Hensel, Hartmut, Dr. ,  Dallmann, Hermann, Dr.

IPC: G11B05/704 ,  G11B05/64 ,  G11B05/848

CPC classification number: B32B27/36 ,  B32B5/16 ,  B32B27/14 ,  B32B27/18 ,  B32B2250/24 ,  B32B2307/518 ,  B32B2307/746 ,  B32B2367/00 ,  B32B2429/02 ,  G11B5/733 ,  G11B5/735 ,  G11B5/848 ,  Y10S428/90 ,  Y10S428/91 ,  Y10T428/2495 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/31786