JPS54153898A - Polyester film - Google Patents

Polyester film

Info

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
Application number
JP6215778A
Other languages
Japanese (ja)
Other versions
JPS6216173B2 (en
Inventor
Sadami Miura
Naoki Yamamoto
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 JP6215778A priority Critical patent/JPS54153898A/en
Publication of JPS54153898A publication Critical patent/JPS54153898A/en
Publication of JPS6216173B2 publication Critical patent/JPS6216173B2/ja
Granted legal-status Critical Current

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).
JP6215778A 1978-05-26 1978-05-26 Polyester film Granted JPS54153898A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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