JPS57167215A - Manufacture of polyester film - Google Patents

Manufacture of polyester film

Info

Publication number
JPS57167215A
JPS57167215A JP5239381A JP5239381A JPS57167215A JP S57167215 A JPS57167215 A JP S57167215A JP 5239381 A JP5239381 A JP 5239381A JP 5239381 A JP5239381 A JP 5239381A JP S57167215 A JPS57167215 A JP S57167215A
Authority
JP
Japan
Prior art keywords
film
stretched
polyester resin
unevened
grain size
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
JP5239381A
Other languages
Japanese (ja)
Other versions
JPS6364289B2 (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 JP5239381A priority Critical patent/JPS57167215A/en
Publication of JPS57167215A publication Critical patent/JPS57167215A/en
Publication of JPS6364289B2 publication Critical patent/JPS6364289B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Magnetic Record Carriers (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

PURPOSE:To obtain a polyester film having a large number of finely unevened surface by a method in which a definite amount of particles of a specific average grain size are added to a polyester resin for magnetic coating, and the polyester resin is stretched in the first axial direction and then in the second axial direction. CONSTITUTION:A polyester resin containing 0.01-20wt% kaolin particles of an average grain size of 0.02-1.5mum is made into a film under a condition that no crystallization occurs in order to obtain an unstretched film. Then, the unstretched film is preheated by four heating rollers 31, 32, 33, and 34, heated by an infrared rays heater 38, and then one-stage stretched 3.5 times in the longitudinal direction between rollers 34 and 35. Then, the film is stretched 3.3 times in the crosswise direction at 105 deg.C and heat-treated at 210 deg.C. The film has 800 or more unevened portions each of a length of 4mum or more per mm.<2>.
JP5239381A 1981-04-09 1981-04-09 Manufacture of polyester film Granted JPS57167215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5239381A JPS57167215A (en) 1981-04-09 1981-04-09 Manufacture of polyester film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5239381A JPS57167215A (en) 1981-04-09 1981-04-09 Manufacture of polyester film

Publications (2)

Publication Number Publication Date
JPS57167215A true JPS57167215A (en) 1982-10-15
JPS6364289B2 JPS6364289B2 (en) 1988-12-12

Family

ID=12913553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5239381A Granted JPS57167215A (en) 1981-04-09 1981-04-09 Manufacture of polyester film

Country Status (1)

Country Link
JP (1) JPS57167215A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5968213A (en) * 1982-10-13 1984-04-18 Toray Ind Inc Biaxially stretched polyester film
JPS59203232A (en) * 1983-05-02 1984-11-17 Diafoil Co Ltd Polyester film for magnetic recording medium
JPS59203231A (en) * 1983-05-02 1984-11-17 Diafoil Co Ltd Polyester film for magnetic tape
JPS61177227A (en) * 1985-02-04 1986-08-08 Toyobo Co Ltd Orientated polyester film
JPS62130848A (en) * 1985-12-03 1987-06-13 東レ株式会社 Polyester film for magnetic record medium
JPH01123836A (en) * 1987-11-10 1989-05-16 Teijin Ltd Biaxially oriented polyester film

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0345784U (en) * 1989-09-09 1991-04-26
JPH0454299U (en) * 1990-09-14 1992-05-08
DE69220932T2 (en) * 1991-12-09 1997-12-11 Toray Industries POLYESTER COMPOSITION AND BIAXIAL ORIENTED POLYESTER FILM MADE THEREOF

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPS5641525A (en) * 1979-09-11 1981-04-18 Diafoil Co Ltd Polyester film for magnetic tape
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
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
JPS5641525A (en) * 1979-09-11 1981-04-18 Diafoil Co Ltd Polyester film for magnetic tape
JPS56102849A (en) * 1980-01-18 1981-08-17 Diafoil Co Ltd Polyester film for photosensitive recording material

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5968213A (en) * 1982-10-13 1984-04-18 Toray Ind Inc Biaxially stretched polyester film
JPS59203232A (en) * 1983-05-02 1984-11-17 Diafoil Co Ltd Polyester film for magnetic recording medium
JPS59203231A (en) * 1983-05-02 1984-11-17 Diafoil Co Ltd Polyester film for magnetic tape
JPH0432730B2 (en) * 1983-05-02 1992-06-01 Daiafoil
JPS61177227A (en) * 1985-02-04 1986-08-08 Toyobo Co Ltd Orientated polyester film
JPH053377B2 (en) * 1985-02-04 1993-01-14 Toyo Boseki Kk
JPS62130848A (en) * 1985-12-03 1987-06-13 東レ株式会社 Polyester film for magnetic record medium
JPH0651401B2 (en) * 1985-12-03 1994-07-06 東レ株式会社 Polyester film for magnetic recording media
JPH01123836A (en) * 1987-11-10 1989-05-16 Teijin Ltd Biaxially oriented polyester film

Also Published As

Publication number Publication date
JPS6364289B2 (en) 1988-12-12

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