JPS6432423A - Floppy disk - Google Patents
Floppy diskInfo
- Publication number
- JPS6432423A JPS6432423A JP18766087A JP18766087A JPS6432423A JP S6432423 A JPS6432423 A JP S6432423A JP 18766087 A JP18766087 A JP 18766087A JP 18766087 A JP18766087 A JP 18766087A JP S6432423 A JPS6432423 A JP S6432423A
- Authority
- JP
- Japan
- Prior art keywords
- film
- biaxially oriented
- magnetic layers
- oriented polyester
- polyester film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Magnetic Record Carriers (AREA)
Abstract
PURPOSE:To improve productivity and characteristics by coating magnetic layers on both faces of a biaxially oriented polyester film consisting of specific polyester and film forming recipe. CONSTITUTION:The biaxially oriented polyester film which has 0.008mum<=Ra<=0.025mum film surface roughness Ra, <=10 pieces/cm<2> coarse projections having >=0.081mum height and the average crystal grain size X100 of the film satisfying simultaneously the range of 58(Angstrom )<=average crystal grain size X100<=75(Angstrom ) is formed. The magnetic layers are coated on both faces thereof. The surface characteristics such as flatness, easy slipperiness and fewer coarse projections are, therefore, obtd. and the biaxially oriented polyester film which has the excellent adhesiveness to the magnetic layers and is well balanced is obtd. The productivity and characteristic are thereby improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18766087A JPS6432423A (en) | 1987-07-29 | 1987-07-29 | Floppy disk |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18766087A JPS6432423A (en) | 1987-07-29 | 1987-07-29 | Floppy disk |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6432423A true JPS6432423A (en) | 1989-02-02 |
Family
ID=16209954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18766087A Pending JPS6432423A (en) | 1987-07-29 | 1987-07-29 | Floppy disk |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6432423A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0424884A2 (en) * | 1989-10-24 | 1991-05-02 | Diafoil Hoechst Co., Ltd | Biaxially oriented polyester film for use in floppy disc |
WO2007091381A1 (en) * | 2006-02-09 | 2007-08-16 | Teijin Dupont Films Japan Limited | Biaxially oriented polyester film and magnetic recording tape |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS551655A (en) * | 1978-06-20 | 1980-01-08 | Tdk Corp | Base for magnetic recording tape |
JPS6168727A (en) * | 1984-09-12 | 1986-04-09 | Teijin Ltd | Biaxially stretched polyester film |
JPS62143938A (en) * | 1985-12-17 | 1987-06-27 | Diafoil Co Ltd | Polyethylene-2,6-naphthalate film for high-density magnetic recording medium |
-
1987
- 1987-07-29 JP JP18766087A patent/JPS6432423A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS551655A (en) * | 1978-06-20 | 1980-01-08 | Tdk Corp | Base for magnetic recording tape |
JPS6168727A (en) * | 1984-09-12 | 1986-04-09 | Teijin Ltd | Biaxially stretched polyester film |
JPS62143938A (en) * | 1985-12-17 | 1987-06-27 | Diafoil Co Ltd | Polyethylene-2,6-naphthalate film for high-density magnetic recording medium |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0424884A2 (en) * | 1989-10-24 | 1991-05-02 | Diafoil Hoechst Co., Ltd | Biaxially oriented polyester film for use in floppy disc |
WO2007091381A1 (en) * | 2006-02-09 | 2007-08-16 | Teijin Dupont Films Japan Limited | Biaxially oriented polyester film and magnetic recording tape |
US8404371B2 (en) | 2006-02-09 | 2013-03-26 | Teijin Dupont Films Japan Limited | Biaxially oriented polyester film and magnetic recording tape |
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