JPS57167216A - Polyester film - Google Patents

Polyester film

Info

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
Application number
JP5239481A
Other languages
Japanese (ja)
Other versions
JPS6351091B2 (en
Inventor
Hideo Kato
Atsushi Yamamoto
Tomio Adachi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teijin Ltd
Original Assignee
Teijin Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Teijin Ltd filed Critical Teijin Ltd
Priority to JP5239481A priority Critical patent/JPS57167216A/en
Publication of JPS57167216A publication Critical patent/JPS57167216A/en
Publication of JPS6351091B2 publication Critical patent/JPS6351091B2/ja
Granted legal-status Critical Current

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.
JP5239481A 1981-04-09 1981-04-09 Polyester film Granted JPS57167216A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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