JPS5772820A - Production of biaxially stretched polyester film - Google Patents
Production of biaxially stretched polyester filmInfo
- Publication number
- JPS5772820A JPS5772820A JP14814380A JP14814380A JPS5772820A JP S5772820 A JPS5772820 A JP S5772820A JP 14814380 A JP14814380 A JP 14814380A JP 14814380 A JP14814380 A JP 14814380A JP S5772820 A JPS5772820 A JP S5772820A
- Authority
- JP
- Japan
- Prior art keywords
- film
- heat
- biaxially stretched
- aromatic polyester
- 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.)
- Granted
Links
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
PURPOSE:To obtain a film having a low heat shrinkage factor and an excellent heat resistance by a method wherein a totally aromatic polyester film is subjected to biaxial stretching and heat shrinkage under specified conditions. CONSTITUTION:A film of a melt-formable totally aromatic polyester containing the isophthalic acid residue and the hydroquinone esidue as major components is biaxially stretched at 180-280 deg.C, then it is heat set at a temperature of not lower than 250 deg.C but lower than the melting point of the aromatic polyester by at least 20 deg.C, and the heat-set film is subjected to a heat shrinkage of at least 1% at a temperature of not lower than 200 deg.C but below the heat setting temperature. Accordingly, a biaxially stretched totally aromatic polyester film having a low heat shrinkage factor and an excellent heat resistance can be produced.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14814380A JPS5772820A (en) | 1980-10-24 | 1980-10-24 | Production of biaxially stretched polyester film |
US06/286,855 US4436894A (en) | 1980-07-31 | 1981-07-27 | Novel wholly aromatic copolyester, process for production thereof, and film melt-shaped therefrom |
EP81106037A EP0045499B1 (en) | 1980-07-31 | 1981-07-31 | Novel wholly aromatic copolyester, process for production thereof, and film melt-shaped therefrom |
DE8181106037T DE3173976D1 (en) | 1980-07-31 | 1981-07-31 | Novel wholly aromatic copolyester, process for production thereof, and film melt-shaped therefrom |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14814380A JPS5772820A (en) | 1980-10-24 | 1980-10-24 | Production of biaxially stretched polyester film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5772820A true JPS5772820A (en) | 1982-05-07 |
JPS6349611B2 JPS6349611B2 (en) | 1988-10-05 |
Family
ID=15446223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14814380A Granted JPS5772820A (en) | 1980-07-31 | 1980-10-24 | Production of biaxially stretched polyester film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5772820A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6258378A (en) * | 1985-09-06 | 1987-03-14 | Fujitsu Ltd | High-speed converting system for color data |
-
1980
- 1980-10-24 JP JP14814380A patent/JPS5772820A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6258378A (en) * | 1985-09-06 | 1987-03-14 | Fujitsu Ltd | High-speed converting system for color data |
Also Published As
Publication number | Publication date |
---|---|
JPS6349611B2 (en) | 1988-10-05 |
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