JPS54153898A - Polyester film - Google Patents
Polyester filmInfo
- Publication number
- JPS54153898A JPS54153898A JP6215778A JP6215778A JPS54153898A JP S54153898 A JPS54153898 A JP S54153898A JP 6215778 A JP6215778 A JP 6215778A JP 6215778 A JP6215778 A JP 6215778A JP S54153898 A JPS54153898 A JP S54153898A
- Authority
- JP
- Japan
- Prior art keywords
- over
- polyester
- polyester film
- mol
- draw ratio
- 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)
- Polyesters Or Polycarbonates (AREA)
Abstract
PURPOSE:A polyester film that is prepared by stretching biaxially a modified polyester wherein the film is made more oriented in the drawing direction A than in the drawing direction B, thus showing high Young's moduldus, high dimensional stability and high anisotropic properties. CONSTITUTION:A polyester prepared from the acid component consisting of 20-65 mol% of 4,4'-diphenyl dicarboxylic acid and 80-35 mol% of terephthalic acid and the glycol component mainly consisting of ethylene glycol is melt extruded to form undrawn films. Then, the films are biaxially stretched in both traverse and lengthwise directions at a draw ratio of 2.5-10 wherein the difference in draw ratio between both directions is preferably made over 1.5, thus the Young's modulus in direction A is over 600 kg/mm<2>, which is over 1,2 times that in direction B. Thus, the polyester film having refractive indexes shown by the equation (nA, nB are refractive indexes in direction A and B respectively).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6215778A JPS54153898A (en) | 1978-05-26 | 1978-05-26 | Polyester film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6215778A JPS54153898A (en) | 1978-05-26 | 1978-05-26 | Polyester film |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54153898A true JPS54153898A (en) | 1979-12-04 |
JPS6216173B2 JPS6216173B2 (en) | 1987-04-10 |
Family
ID=13191989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6215778A Granted JPS54153898A (en) | 1978-05-26 | 1978-05-26 | Polyester film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54153898A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015437A (en) * | 1983-07-08 | 1985-01-26 | Mitsubishi Chem Ind Ltd | Polyimide film for magnetic recording medium |
JPS6015436A (en) * | 1983-07-08 | 1985-01-26 | Mitsubishi Chem Ind Ltd | Polyimide film for magnetic recording medium |
JPS61211014A (en) * | 1985-03-05 | 1986-09-19 | ヘキスト・アクチエンゲゼルシヤフト | Biaxial oriented heat-set film having improved abrasion resistance consisting of thermoplastic polyester |
JPH0230515A (en) * | 1988-07-21 | 1990-01-31 | Diafoil Co Ltd | Polyester film |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3008934A (en) * | 1958-07-28 | 1961-11-14 | American Viscose Corp | Filament and film forming interpolyesters of bibenzoic acid, certain aromatic acids and a dihydric alcohol |
JPS49110916A (en) * | 1973-02-12 | 1974-10-22 | ||
JPS54125270A (en) * | 1978-03-23 | 1979-09-28 | Toyobo Co Ltd | Production of oriented product of polyester resin |
-
1978
- 1978-05-26 JP JP6215778A patent/JPS54153898A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3008934A (en) * | 1958-07-28 | 1961-11-14 | American Viscose Corp | Filament and film forming interpolyesters of bibenzoic acid, certain aromatic acids and a dihydric alcohol |
JPS49110916A (en) * | 1973-02-12 | 1974-10-22 | ||
JPS54125270A (en) * | 1978-03-23 | 1979-09-28 | Toyobo Co Ltd | Production of oriented product of polyester resin |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6015437A (en) * | 1983-07-08 | 1985-01-26 | Mitsubishi Chem Ind Ltd | Polyimide film for magnetic recording medium |
JPS6015436A (en) * | 1983-07-08 | 1985-01-26 | Mitsubishi Chem Ind Ltd | Polyimide film for magnetic recording medium |
JPS61211014A (en) * | 1985-03-05 | 1986-09-19 | ヘキスト・アクチエンゲゼルシヤフト | Biaxial oriented heat-set film having improved abrasion resistance consisting of thermoplastic polyester |
JPH0230515A (en) * | 1988-07-21 | 1990-01-31 | Diafoil Co Ltd | Polyester film |
Also Published As
Publication number | Publication date |
---|---|
JPS6216173B2 (en) | 1987-04-10 |
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