JPS57167216A - Polyester film - Google Patents
Polyester filmInfo
- Publication number
- JPS57167216A JPS57167216A JP5239481A JP5239481A JPS57167216A JP S57167216 A JPS57167216 A JP S57167216A JP 5239481 A JP5239481 A JP 5239481A JP 5239481 A JP5239481 A JP 5239481A JP S57167216 A JPS57167216 A JP S57167216A
- Authority
- JP
- Japan
- Prior art keywords
- film
- polyester film
- rollers
- uneven
- 4mum
- 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.)
- Granted
Links
Landscapes
- Magnetic Record Carriers (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
PURPOSE:To raise the durability of a polyester film by a method wherein an uneven unit consisting of convexities and cancavities of a longitudinal diameter of at least 4mum is provided on the magnetic coating surface of the polyester film but no said uneven unit is provided on the other side. CONSTITUTION:A polyethylene terephthalate film containing 0.26wt% kaolin particles of an average grain size of 0.58m is obtained unstretched. The unstretched film is preheated to 92 deg.C by preheating rollers 31, 32, 33, and 34, one side of the film is heated by five infrared heaters 38, the other side is cooled to 10 deg.C by an air nozzle 40. During the period, the film is passed through rollers 35, 36, and 37, one-stage stretched 3.1 times in the longitudinal direction between the rollers 34 and 35, stretched 3.2 times in the crosswise direction at 210 deg.C, and then heat-treated at 210 deg.C. Thus, a polyester film having 1,400 uneven portions per mm.<2> of a length of 4mum or more on its surface and 300 uneven portions per mm.<2> on its back side can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5239481A JPS57167216A (en) | 1981-04-09 | 1981-04-09 | Polyester film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5239481A JPS57167216A (en) | 1981-04-09 | 1981-04-09 | Polyester film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57167216A true JPS57167216A (en) | 1982-10-15 |
JPS6351091B2 JPS6351091B2 (en) | 1988-10-12 |
Family
ID=12913579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5239481A Granted JPS57167216A (en) | 1981-04-09 | 1981-04-09 | Polyester film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57167216A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57189822A (en) * | 1981-05-20 | 1982-11-22 | Toray Ind Inc | Biaxially stretched polyester film |
JPS5855222A (en) * | 1981-09-28 | 1983-04-01 | Nippon Kagaku Seni Kenkyusho | Roughened polyester film |
JPS5924432A (en) * | 1982-07-29 | 1984-02-08 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS61167530A (en) * | 1985-01-21 | 1986-07-29 | Diafoil Co Ltd | Polyester film for magnetic recording material |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53147774A (en) * | 1977-05-31 | 1978-12-22 | Daiafoil | Method for making polyester film |
JPS5473877A (en) * | 1977-11-24 | 1979-06-13 | Teijin Ltd | Polyester film having improved running properties |
JPS559851A (en) * | 1978-07-07 | 1980-01-24 | Diafoil Co Ltd | Polyester film for drawing, plate making |
JPS56102849A (en) * | 1980-01-18 | 1981-08-17 | Diafoil Co Ltd | Polyester film for photosensitive recording material |
-
1981
- 1981-04-09 JP JP5239481A patent/JPS57167216A/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53147774A (en) * | 1977-05-31 | 1978-12-22 | Daiafoil | Method for making polyester film |
JPS5473877A (en) * | 1977-11-24 | 1979-06-13 | Teijin Ltd | Polyester film having improved running properties |
JPS559851A (en) * | 1978-07-07 | 1980-01-24 | Diafoil Co Ltd | Polyester film for drawing, plate making |
JPS56102849A (en) * | 1980-01-18 | 1981-08-17 | Diafoil Co Ltd | Polyester film for photosensitive recording material |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57189822A (en) * | 1981-05-20 | 1982-11-22 | Toray Ind Inc | Biaxially stretched polyester film |
JPH0212742B2 (en) * | 1981-05-20 | 1990-03-26 | Toray Industries | |
JPS5855222A (en) * | 1981-09-28 | 1983-04-01 | Nippon Kagaku Seni Kenkyusho | Roughened polyester film |
JPH021651B2 (en) * | 1981-09-28 | 1990-01-12 | Nippon Kagaku Seni Kenkyusho | |
JPS5924432A (en) * | 1982-07-29 | 1984-02-08 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
JPS61167530A (en) * | 1985-01-21 | 1986-07-29 | Diafoil Co Ltd | Polyester film for magnetic recording material |
JPH0420369B2 (en) * | 1985-01-21 | 1992-04-02 | Daiafoil |
Also Published As
Publication number | Publication date |
---|---|
JPS6351091B2 (en) | 1988-10-12 |
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