发明公开
- 专利标题： Magnetic recording tape
- 专利标题（中）： Magnetisches Aufzeichnungsband。
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申请号： EP92303502.6申请日： 1992-04-21
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公开(公告)号： EP0510893A1公开(公告)日： 1992-10-28
- 发明人: Etchu, Masami , Hamano, Hisashi , Hosoi, Masahiro , Kobayashi, Ieyasu , Saeki, Yasuhiro
- 申请人： TEIJIN LIMITED
- 申请人地址： 6-7, Minamihonmachi 1-chome Chuo-ku Osaka-shi Osaka 541 JP
- 专利权人： TEIJIN LIMITED
- 当前专利权人： TEIJIN LIMITED
- 当前专利权人地址： 6-7, Minamihonmachi 1-chome Chuo-ku Osaka-shi Osaka 541 JP
- 代理机构： Votier, Sidney David
- 优先权： JP121762/91 19910425
- 主分类号： G11B5/64
- IPC分类号： G11B5/64
摘要：
A magnetic recording tape, in particular a VTR tape, comprising;
(A) a substrate composed of a biaxially oriented polyethylene-2,6-naphthalate film of which
(a) the Young' modulus in the longitudinal direction is at least 650 kg/mm², the Young' modulus in a transverse direction is the same as, or greater than, the Young's modulus in the longitudinal direction,
(b) the heat shrinkage in the transverse direction is in the range of 1.0 to 3.0 % when treated at 100°C for 30 minutes,
(c) the surface roughness, Ra, is not more than 0.005 µm, and
(d) the amount of bled-out oligomer is not more than 0.01 area% when treated in air at 160°C for 5 minutes,
(B) a thin magnetic metal layer formed on one surface of the substrate, and
(C) a lubricant-containing thin organic polymer layer formed on the other surface of the substrate. This magnetic recording tape has high coercive force and excellent running durability and is capable of recording data at high density and high sensitivity for a long period of time.
(A) a substrate composed of a biaxially oriented polyethylene-2,6-naphthalate film of which
(a) the Young' modulus in the longitudinal direction is at least 650 kg/mm², the Young' modulus in a transverse direction is the same as, or greater than, the Young's modulus in the longitudinal direction,
(b) the heat shrinkage in the transverse direction is in the range of 1.0 to 3.0 % when treated at 100°C for 30 minutes,
(c) the surface roughness, Ra, is not more than 0.005 µm, and
(d) the amount of bled-out oligomer is not more than 0.01 area% when treated in air at 160°C for 5 minutes,
(B) a thin magnetic metal layer formed on one surface of the substrate, and
(C) a lubricant-containing thin organic polymer layer formed on the other surface of the substrate. This magnetic recording tape has high coercive force and excellent running durability and is capable of recording data at high density and high sensitivity for a long period of time.
公开/授权文献
- EP0510893B1 Magnetic recording tape 公开/授权日：1996-09-25
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