JPS55123427A - Preparation of polyester film - Google Patents

Preparation of polyester film

Info

Publication number
JPS55123427A
JPS55123427A JP3105979A JP3105979A JPS55123427A JP S55123427 A JPS55123427 A JP S55123427A JP 3105979 A JP3105979 A JP 3105979A JP 3105979 A JP3105979 A JP 3105979A JP S55123427 A JPS55123427 A JP S55123427A
Authority
JP
Japan
Prior art keywords
film
polyester
slit
machine
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
Application number
JP3105979A
Other languages
Japanese (ja)
Inventor
Takanori Urasaki
Hiroo Inada
Hiroshi Morinaga
Makoto Ogasawara
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 JP3105979A priority Critical patent/JPS55123427A/en
Publication of JPS55123427A publication Critical patent/JPS55123427A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE: To obtain polyester film of high Young's modulus and strength, by orienting polyester extruded from a slit by specific rates in a machine-axial direction and in a direction rectangular to it at temperatures higher than the softening point.
CONSTITUTION: In preparation of polyester film, polyester is melt-extruded from a slit and the width is elongated by 1.5 times or more in a machine-axial direction and in a direction rectangular to it and the area is magnified by three times or more. The clearance of the slit is freely selected according to the thickness of the film. According to the abovementioned method, the melt film-forming process gives useful polyester film with an excellent mechanical property not only with regard to a film machine-axial direction but also to a direction rectangular to it from polyester which forms molten material with optical anisotropy.
COPYRIGHT: (C)1980,JPO&Japio
JP3105979A 1979-03-19 1979-03-19 Preparation of polyester film Pending JPS55123427A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3105979A JPS55123427A (en) 1979-03-19 1979-03-19 Preparation of polyester film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3105979A JPS55123427A (en) 1979-03-19 1979-03-19 Preparation of polyester film

Publications (1)

Publication Number Publication Date
JPS55123427A true JPS55123427A (en) 1980-09-22

Family

ID=12320897

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3105979A Pending JPS55123427A (en) 1979-03-19 1979-03-19 Preparation of polyester film

Country Status (1)

Country Link
JP (1) JPS55123427A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5646727A (en) * 1979-09-25 1981-04-28 Teijin Ltd Manufacture of polyester film
JPS6223789A (en) * 1985-07-24 1987-01-31 Matsushita Electric Ind Co Ltd Transfer body for thermal recording

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117973A (en) * 1976-03-30 1977-10-03 Unitika Ltd Method of manufacturing electric insulation film
JPS5339371A (en) * 1976-09-22 1978-04-11 Sumitomo Chemical Co Method of orienting film or sheet of polyallylate resin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52117973A (en) * 1976-03-30 1977-10-03 Unitika Ltd Method of manufacturing electric insulation film
JPS5339371A (en) * 1976-09-22 1978-04-11 Sumitomo Chemical Co Method of orienting film or sheet of polyallylate resin

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5646727A (en) * 1979-09-25 1981-04-28 Teijin Ltd Manufacture of polyester film
JPS6223789A (en) * 1985-07-24 1987-01-31 Matsushita Electric Ind Co Ltd Transfer body for thermal recording

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