JPS57135009A - Preparation of regenerated cellulose film with selective permeability - Google Patents
Preparation of regenerated cellulose film with selective permeabilityInfo
- 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
Links
Landscapes
- 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
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)
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 |
-
1981
- 1981-02-13 JP JP1891181A patent/JPS57135009A/en active Pending
Cited By (1)
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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