JPS57135009A - Preparation of regenerated cellulose film with selective permeability - Google Patents

Preparation of regenerated cellulose film with selective permeability

Info

Publication number
JPS57135009A
JPS57135009A JP1891181A JP1891181A JPS57135009A JP S57135009 A JPS57135009 A JP S57135009A JP 1891181 A JP1891181 A JP 1891181A JP 1891181 A JP1891181 A JP 1891181A JP S57135009 A JPS57135009 A JP S57135009A
Authority
JP
Japan
Prior art keywords
film
regenerated cellulose
selective permeability
saponified
melted
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
JP1891181A
Other languages
Japanese (ja)
Inventor
Masahiro Koga
Ryozo Hasegawa
Nobuo Taneda
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 JP1891181A priority Critical patent/JPS57135009A/en
Publication of JPS57135009A publication Critical patent/JPS57135009A/en
Pending legal-status Critical Current

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  • Separation Using Semi-Permeable Membranes (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

PURPOSE: To form the regenerated cellulose film with improved selective permeability by a method wherein two kinds of plasticizers having different solubilities are added to cellulose triacetate and, after the obtained mixture is melted and formed into a film, the resulting film is saponified.
CONSTITUTION: In 100pts.wt. cellulose triacetate with 60% acetylation degree, 40pts.wt. fluforane as a good solvent plasticizer and 20pts.wt. polyethylene glycol as a poor solvent plasticizer are mixed. The resulting mixed solution is held between ferrotype plates and melted and formed into a film at 240°C under pressure to obtain the flat film with 65μ thickness. The obtained film is immersed in 3.0% NaOH aqueous solution for 3min at 30°C to be saponified and, thereafter, sufficiently washed by water. The obtained regenerated cellulose film has physical properties such that a film thickness is 54 μm, permeation velocity of pure water is 2.3ml/m2.hr.mmHg, strength is 1.08kg/mm2, elongation is 88% while Young's modulus is 2.23kg/mm2.
COPYRIGHT: (C)1982,JPO&Japio
JP1891181A 1981-02-13 1981-02-13 Preparation of regenerated cellulose film with selective permeability Pending JPS57135009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1891181A JPS57135009A (en) 1981-02-13 1981-02-13 Preparation of regenerated cellulose film with selective permeability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1891181A JPS57135009A (en) 1981-02-13 1981-02-13 Preparation of regenerated cellulose film with selective permeability

Publications (1)

Publication Number Publication Date
JPS57135009A true JPS57135009A (en) 1982-08-20

Family

ID=11984783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1891181A Pending JPS57135009A (en) 1981-02-13 1981-02-13 Preparation of regenerated cellulose film with selective permeability

Country Status (1)

Country Link
JP (1) JPS57135009A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107875864A (en) * 2017-11-03 2018-04-06 宁波大学 A kind of high flux Triafol T perforated membrane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107875864A (en) * 2017-11-03 2018-04-06 宁波大学 A kind of high flux Triafol T perforated membrane

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