JPS5759717A - Preparation of biaxially oriented polyester film - Google Patents

Preparation of biaxially oriented polyester film

Info

Publication number
JPS5759717A
JPS5759717A JP13439280A JP13439280A JPS5759717A JP S5759717 A JPS5759717 A JP S5759717A JP 13439280 A JP13439280 A JP 13439280A JP 13439280 A JP13439280 A JP 13439280A JP S5759717 A JPS5759717 A JP S5759717A
Authority
JP
Japan
Prior art keywords
film
gripped
oriented
biaxially oriented
traverse
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
JP13439280A
Other languages
Japanese (ja)
Other versions
JPS6324459B2 (en
Inventor
Koichiro Arita
Hiroshi Noda
Hisashi Hamano
Hideaki Watanabe
Haruhiko Mizumori
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 JP13439280A priority Critical patent/JPS5759717A/en
Publication of JPS5759717A publication Critical patent/JPS5759717A/en
Publication of JPS6324459B2 publication Critical patent/JPS6324459B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE:To obtain a highly uniformly film of which various physical properties are balanced in a longitudinal and traverse directions by forcedly advancing the film in such a condition that only central narrow part of the longitudinally and traversely oriented film is gripped by nip rolls while both side ends of said film is gripped. CONSTITUTION:In preparing a biaxially oriented film by a method wherein a thermoplastic polyester film (e.g.; a polyethylene terephthalate film or the like) uniaxially oriented to a longitudinal direction is oriented to a traverse direction by a tenter and, further, subjected to heat treatment, while both sides ends of the film after traverse orientation is completed are gripped by a gripping means of the tenter, only a narrow part in the vicinity of a central part of the film is gripped by nip rollers to impart advancement drive action to said central part of the film and, thereby, a process so as to forcedly advance said central part is added. By adding said process, bowing phenomenon can be eliminated (or reduced) and the biaxially oriented polyester film with uniform physical properties is obtained.
JP13439280A 1980-09-29 1980-09-29 Preparation of biaxially oriented polyester film Granted JPS5759717A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13439280A JPS5759717A (en) 1980-09-29 1980-09-29 Preparation of biaxially oriented polyester film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13439280A JPS5759717A (en) 1980-09-29 1980-09-29 Preparation of biaxially oriented polyester film

Publications (2)

Publication Number Publication Date
JPS5759717A true JPS5759717A (en) 1982-04-10
JPS6324459B2 JPS6324459B2 (en) 1988-05-20

Family

ID=15127322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13439280A Granted JPS5759717A (en) 1980-09-29 1980-09-29 Preparation of biaxially oriented polyester film

Country Status (1)

Country Link
JP (1) JPS5759717A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59139131A (en) * 1983-01-12 1984-08-09 Diafoil Co Ltd Polyester film for magnetic disk
JP2013010309A (en) * 2011-06-30 2013-01-17 Nippon Zeon Co Ltd Method of manufacturing film

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59139131A (en) * 1983-01-12 1984-08-09 Diafoil Co Ltd Polyester film for magnetic disk
JPH0413135B2 (en) * 1983-01-12 1992-03-06 Daiafoil
JP2013010309A (en) * 2011-06-30 2013-01-17 Nippon Zeon Co Ltd Method of manufacturing film

Also Published As

Publication number Publication date
JPS6324459B2 (en) 1988-05-20

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