JPS55123427A - Preparation of polyester film - Google Patents
Preparation of polyester filmInfo
- 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
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
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)
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)
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 |
-
1979
- 1979-03-19 JP JP3105979A patent/JPS55123427A/en active Pending
Patent Citations (2)
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)
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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