公开(公告)号：WO1987003413A1

公开(公告)日：1987-06-04

申请号：PCT/US1986002488

申请日：1986-11-19

Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY ,  MIYASAKA, Mitsutoshi ,  INOUE, Makoto ,  ISHIDA, Neyoshi ,  MIYATA, Norio

Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY

IPC: G11B05/704

CPC classification number: G11B5/735

Abstract: Magnetic recording medium comprising a non-magnetic base layer carrying a magnetic recording layer on one side and a back coating containing carbon black. The preferred carbon black has a surface area of between 18 and 50 m /g and an average crystallite size, L , of between 18 and 60 Angstroms. Runability, edge damage and dropout characteristics are improved.

Abstract translation: 磁性记录介质包括在一侧承载磁记录层的非磁性基层和含有炭黑的背涂层。 优选的炭黑的表面积为18至50m 2 / g，平均微晶尺寸L c为18至60埃。 运行性，边缘损伤和脱落特性得到改善。

公开(公告)号：EP0188197A3

公开(公告)日：1988-12-28

申请号：EP86100071

申请日：1986-01-04

Applicant: HOECHST AKTIENGESELLSCHAFT

Inventor： Dallmann, Hermann, Dr. ,  Seifried, Walter, Dr. ,  Schäfer, Werner, Dr. ,  Janocha, Siegfried, Dr. ,  Hensel, Hartmut, Dr.

IPC: C08J05/18 ,  G11B05/704

CPC classification number: C08J5/18 ,  B29C55/005 ,  B29K2067/00 ,  B29K2105/16 ,  Y10S428/91 ,  Y10T428/30 ,  Y10T428/31565 ,  Y10T428/31573 ,  Y10T428/31663

公开(公告)号：EP0201715A3

公开(公告)日：1988-07-27

申请号：EP86104740

申请日：1986-04-07

Applicant: TEIJIN LIMITED

Inventor： Takahashi, Teruo ,  Yoshikawa, Hirofumi ,  Miura, Sadayoshi ,  Kanai, Tamaki

IPC: C08J07/04 ,  C08L75/04 ,  G11B05/704 ,  C08L63/00

CPC classification number: C08J7/047 ,  C08G18/0819 ,  C08G18/831 ,  C08J2367/02 ,  C08J2475/00 ,  C09D175/04 ,  G11B5/7305 ,  G11B5/825 ,  H05K2203/124 ,  C08L63/00

Abstract: A polyester film having on at least one surface thereof a primer layer comprising a crosslinked product of a polyurethane having at least one functional group selected from a carboxyl group, a sulfo group, a hemisulfate group, and salts of these groups and a polyepoxy compound. The polyester film having a primer layer can be produced by coating an aqueous primer coating composition comprising a polyurethane having at least one of a carboxylic acid salt group, a sulfonic acid salt group and a hemisulfate salt group on at least one surface of a polyester film before its crystallization and orientation are completed, and thereafter completing the cyrstallization and orientation by subjecting the coated film to drying, stretching and heat-treatment, and is useful as a base film for magnetic recording media.

公开(公告)号：EP0206599A3

公开(公告)日：1988-07-13

申请号：EP86304332

申请日：1986-06-06

Applicant: POLYPLASTICS CO. LTD.

Inventor： Ikenaga, Yukio ,  Takahashi, Katsuhiko ,  Hijikata, Kenji ,  Kanoe, Toshio ,  Okada, Tsuneyoshi

IPC: G11B05/704

CPC classification number: G11B5/7305 ,  Y10S428/90 ,  Y10S428/91 ,  Y10T428/31786

Abstract: A magnetic disk comprises a substrate of a resin composition comprising a polymer being capable of the anisotropic phase on the molten state and a magnetic layer formed on at least one surface of said substrate. The substrate is a laminate of a plurality, preferably two, of monoaxially oriented sheets, eventually being multiaxially oriented.

公开(公告)号：EP0203604A3

公开(公告)日：1988-07-13

申请号：EP86107299

申请日：1986-05-28

Applicant: TEIJIN LIMITED

Inventor： Katoh, Hideo ,  Hasegawa, Kinji

IPC: G11B05/64 ,  G11B05/704

CPC classification number: G11B5/735 ,  G11B5/73 ,  Y10S428/90 ,  Y10S428/91 ,  Y10T428/24355 ,  Y10T428/24372 ,  Y10T428/25 ,  Y10T428/31786

Abstract: The invention relates to a biaxially oriented polyester film for use in thin metallic film-type magnetic recorcing media, said polymester film having a first surface to which a thin metallic film as a magnetic recording layer is to be applied and a second surface coated with an easily slippable layer composed of an organic polymeric binder and inert fine solid particles dispersed therein, the first surface having (a) large protrusions with a diameter of 0.2 to 2 micrometers and a height ot 20 to 200 angstrom distributed at a density of at least 10 3 but less than 10 6 per mm 2 , and (b) small protrusions with a diameter of 0.01 to 0.1 micrometer and a height of 10 to 100 angstrom distributed at a density of from 10 6 up to 10 9 .

公开(公告)号：EP0169522A3

公开(公告)日：1988-06-01

申请号：EP85109121

申请日：1985-07-22

Applicant: BASF Aktiengesellschaft

Inventor： Balz, Werner, Dr. ,  Kovacs, Jenoe, Dr. ,  Lechner, Hilmar ,  Schaefer, Dieter, Dr. ,  Buethe, Ingolf, Dr.

IPC: G11B05/704

CPC classification number: G11B5/7305

公开(公告)号：WO1996030900A1

公开(公告)日：1996-10-03

申请号：PCT/EP1996001155

申请日：1996-03-18

Applicant: BASF MAGNETICS (HOLDING) GMBH ,  LEHNER, August ,  JAKUSCH, Helmut ,  KOCH, Volker ,  OHLINGER, Manfred ,  KOHL, Albert ,  LENZ, Werner ,  SCHNEIDER, Norbert ,  HEILMANN, Peter ,  VEITCH, Ronald, John ,  HOFFMANN, Erich ,  HÜBNER, Werner ,  JACHOW, Harald ,  LEHNERT, Rudi

Inventor： BASF MAGNETICS (HOLDING) GMBH

IPC: G11B05/704

CPC classification number: G11B5/708 ,  G11B5/733 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/256 ,  Y10T428/257

Abstract: Described are tape-type magnetic recording media (I) including a non-magnetic substrate (III), at least one film applied to the substrate and, in at least one of these films, an inorganic acicular pigment (II) suitable for use as a supporting pigment, the ratio of the mean length to the mean diameter of the pigment (II) being at least 3 and the mean modulus of elasticity of the films being not less than 15 GPa in the longitudinal direction of the tape-type recording medium (I).

Abstract translation: 含有非磁性基带形磁记录介质（I）（III）中，应用于该支撑层上的至少一个并且适合作为在这些层（II）的平均长度的比率中的至少一个到颜料的中值平均直径的支撑颜料无机针状颜料 的至少3个，其特征在于，所述层的弹性模量平均不处于带形记录介质（I）的纵向方向上小于15 GPA（II）。

公开(公告)号：WO1996002053A1

公开(公告)日：1996-01-25

申请号：PCT/HU1995000027

申请日：1995-06-22

Applicant: POLGARI BANK RT. ,  TOTH, László

Inventor： POLGARI BANK RT.

IPC: G11B05/704

CPC classification number: G11B5/68

Abstract: The invention relates to an information-carrying magnetic tape with improved properties, which contains a magnetizable electric information-carrying layer (2) applied onto one side of a plastic carrier layer (1) in a manner known per se, wherein parallel with the longitudinal axis of the magnetic tape glass fibres (4) provided with a plastic coating (5) compatible with the material of the plastic carrier layer (4) are arranged in the plastic carrier layer (1). It is characteristic of the magnetic tape according to the invention that primary glass fibres (4) of elongated elliptical cross section are arranged in the plastic carrier layer (1). In the information-carrying magnetic tape according to the invention, the specifically utilizable amount of the glass fibres can considerably be increased; therefore, the tensile strength of the tape can be increased to a similar extent.

Abstract translation: 本发明涉及具有改进性能的信息携带磁带，其包含以本身已知的方式施加在塑料载体层（1）的一侧上的可磁化电信息载体层（2），其中平行于纵向 设置有与塑料载体层（4）的材料相容的塑料涂层（5）的磁带玻璃纤维（4）的轴线布置在塑料载体层（1）中。 根据本发明的磁带的特征在于，在塑料载体层（1）中布置细长椭圆截面的主玻璃纤维（4）。 在根据本发明的信息携带磁带中，玻璃纤维的特定用量可以显着提高; 因此，带的拉伸强度可以增加到相似程度。

公开(公告)号：WO1994027290A1

公开(公告)日：1994-11-24

申请号：PCT/JP1994000711

申请日：1994-04-27

Applicant: TDK CORPORATION

Inventor： TDK CORPORATION ,  KUROSE, Shigeo ,  HONJO, Yoshihiro ,  SOMIYA, Akira

IPC: G11B05/704

CPC classification number: G11B5/735 ,  Y10S428/90 ,  Y10T428/24355

Abstract: A magnetic recording medium having a magnetic layer on one surface of a nonmagnetic support and a back coat layer on the other surface, wherein the back coat layer contains two kinds of carbon black having different average particle sizes and a binder containing two kinds of copolymer. One of the copolymers is copolymer A comprising vinyl chloride, alkylcarboxylic acid/vinyl ester and vinyl alcohol and having an average degree of polymerisation of 300 to 600, and the other is copolymer B further containing an amino group and having an average degree of polymerisation of 200 to 800. The present invention accomplishes a magnetic recording medium having a back coat layer having an excellent surface property, high electromagnetic conversion characteristics, high travel stability and high travel durability.

Abstract translation: 在非磁性载体的一个表面上具有磁性层的磁记录介质和另一个表面上的背涂层，其中背涂层含有两种平均粒径不同的炭黑和含有两种共聚物的粘合剂。 共聚物之一是包含氯乙烯，烷基羧酸/乙烯基酯和乙烯醇并且平均聚合度为300-600的共聚物A，另一种是进一步含有氨基并具有平均聚合度的共聚物B 本发明实现了具有表面性能优异，电磁转换特性高，行进稳定性高，行进耐久性高的背涂层的磁记录介质。

公开(公告)号：WO1994008336A1

公开(公告)日：1994-04-14

申请号：PCT/JP1993001389

申请日：1993-09-29

Applicant: TDK CORPORATION

Inventor： TDK CORPORATION ,  IKARASHI, Tsunehiko ,  TAKASUGI, Yasufumi ,  AOYAMA, Tsutomu ,  SAITOH, Akira ,  MOTEGI, Yuko ,  KUWAJIMA, Takayoshi

IPC: G11B05/704

CPC classification number: G11B5/738 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/2982

Abstract: A magnetic layer is formed on a non-magnetic substrate through a non-ferromagnetic layer. This non-ferromagnetic layer contains spherical, non-ferromagnetic fine granular iron oxide. Alternatively, it contains non-structural carbon having a mean grain size of 10 to 60 nm, a specific surface area of up to 150 cm2/g by a BET method and a DBP oil absorption quantity of up to 100 ml/100 g in addition to, or in place of, this iron oxide. In this way, a magnetic recording medium having excellent surface property and electromagnetic conversion characteristics can be accomplished.

Abstract translation: 磁性层通过非铁磁层形成在非磁性衬底上。 该非铁磁层包含球形非铁磁性细颗粒状氧化铁。 或者，其包含平均粒径为10〜60nm的非结构碳，通过BET法的比表面积高达150cm2 / g，DBP吸油量高达100ml / 100g 或代替该氧化铁。 以这种方式，可以实现具有优异的表面性质和电磁转换特性的磁记录介质。