JPS6475211A - Manufacture of film - Google Patents

Manufacture of film

Info

Publication number
JPS6475211A
JPS6475211A JP23119887A JP23119887A JPS6475211A JP S6475211 A JPS6475211 A JP S6475211A JP 23119887 A JP23119887 A JP 23119887A JP 23119887 A JP23119887 A JP 23119887A JP S6475211 A JPS6475211 A JP S6475211A
Authority
JP
Japan
Prior art keywords
dope
film
face
supporting face
dram
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
JP23119887A
Other languages
Japanese (ja)
Inventor
Masami Hamada
Shigemitsu Muraoka
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.)
Asahi Chemical Industry Co Ltd
Original Assignee
Asahi Chemical Industry Co 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 Asahi Chemical Industry Co Ltd filed Critical Asahi Chemical Industry Co Ltd
Priority to JP23119887A priority Critical patent/JPS6475211A/en
Publication of JPS6475211A publication Critical patent/JPS6475211A/en
Pending legal-status Critical Current

Links

Landscapes

  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

PURPOSE:To improve productivity of a film whose heat resistance and mechanical physical properties are favorable, by a method wherein an endless belt or a dram is used as a supporting face, and a matter obtained by applying a coating of fluorine resin to a metal is used as the face coming into contact with its dope. CONSTITUTION:An endless belt or a dram is used as a supporting face. At least the face of the supporting face, to which a dope is cast is obtained by applying coating of fluorine resin to a metal. An optically anisotropic dope comprised of poly-(p-phenyleneterephthalic amide) whose logarithmic viscosity is 3.5 01 higher and 95wt.% or more sulfuric acid is cast on the supporting face while holding optical anisotropy as it is. Continuously, after the dope has been transformed to optical isotropy through moisture absorption and/or beating, the same is converted to have optical isotropy, solidified after washing of the same, a film is dried while controlling shrinkage of the film.
JP23119887A 1987-09-17 1987-09-17 Manufacture of film Pending JPS6475211A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23119887A JPS6475211A (en) 1987-09-17 1987-09-17 Manufacture of film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23119887A JPS6475211A (en) 1987-09-17 1987-09-17 Manufacture of film

Publications (1)

Publication Number Publication Date
JPS6475211A true JPS6475211A (en) 1989-03-20

Family

ID=16919879

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23119887A Pending JPS6475211A (en) 1987-09-17 1987-09-17 Manufacture of film

Country Status (1)

Country Link
JP (1) JPS6475211A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380028A2 (en) * 1989-01-23 1990-08-01 Eastman Kodak Company Process for the production of low birefringent polymer films

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0380028A2 (en) * 1989-01-23 1990-08-01 Eastman Kodak Company Process for the production of low birefringent polymer films
EP0380028A3 (en) * 1989-01-23 1992-06-03 Eastman Kodak Company Process for the production of low birefringent polymer films

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