CA1107020A - Cellulose acetate hollow fiber and method for making same - Google Patents
Cellulose acetate hollow fiber and method for making sameInfo
- Publication number
- CA1107020A CA1107020A CA306,020A CA306020A CA1107020A CA 1107020 A CA1107020 A CA 1107020A CA 306020 A CA306020 A CA 306020A CA 1107020 A CA1107020 A CA 1107020A
- Authority
- CA
- Canada
- Prior art keywords
- fibers
- range
- fiber
- cellulose acetate
- coefficient
- 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.)
- Expired
Links
- 229920002301 cellulose acetate Polymers 0.000 title claims abstract description 52
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000835 fiber Substances 0.000 claims abstract description 139
- 239000000203 mixture Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000004202 carbamide Substances 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 22
- 239000008280 blood Substances 0.000 claims abstract description 21
- 210000004369 blood Anatomy 0.000 claims abstract description 21
- 230000035699 permeability Effects 0.000 claims abstract description 17
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 76
- 235000011187 glycerol Nutrition 0.000 claims description 38
- 229920001223 polyethylene glycol Polymers 0.000 claims description 15
- 239000002202 Polyethylene glycol Substances 0.000 claims description 14
- DDRJAANPRJIHGJ-UHFFFAOYSA-N creatinine Chemical compound CN1CC(=O)NC1=N DDRJAANPRJIHGJ-UHFFFAOYSA-N 0.000 claims description 14
- 238000010622 cold drawing Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 238000001631 haemodialysis Methods 0.000 claims description 12
- 230000000322 hemodialysis Effects 0.000 claims description 12
- 238000002386 leaching Methods 0.000 claims description 10
- 229940109239 creatinine Drugs 0.000 claims description 7
- 238000000108 ultra-filtration Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 6
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- FDJOLVPMNUYSCM-UVKKECPRSA-L cobalt(3+);[(2r,3s,4r,5s)-5-(5,6-dimethylbenzimidazol-1-yl)-4-hydroxy-2-(hydroxymethyl)oxolan-3-yl] [(2r)-1-[3-[(2r,3r,4z,7s,9z,12s,13s,14z,17s,18s,19r)-2,13,18-tris(2-amino-2-oxoethyl)-7,12,17-tris(3-amino-3-oxopropyl)-3,5,8,8,13,15,18,19-octamethyl-2,7, Chemical compound [Co+3].N#[C-].C1([C@H](CC(N)=O)[C@@]2(C)CCC(=O)NC[C@@H](C)OP([O-])(=O)O[C@H]3[C@H]([C@H](O[C@@H]3CO)N3C4=CC(C)=C(C)C=C4N=C3)O)[N-]\C2=C(C)/C([C@H](C\2(C)C)CCC(N)=O)=N/C/2=C\C([C@H]([C@@]/2(CC(N)=O)C)CCC(N)=O)=N\C\2=C(C)/C2=N[C@]1(C)[C@@](C)(CC(N)=O)[C@@H]2CCC(N)=O FDJOLVPMNUYSCM-UVKKECPRSA-L 0.000 claims description 3
- 229940045999 vitamin b 12 Drugs 0.000 claims description 3
- 239000011872 intimate mixture Substances 0.000 claims description 2
- 210000003734 kidney Anatomy 0.000 abstract description 27
- 229920002678 cellulose Polymers 0.000 abstract description 12
- 239000001913 cellulose Substances 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 9
- LEHOTFFKMJEONL-UHFFFAOYSA-N Uric Acid Chemical compound N1C(=O)NC(=O)C2=C1NC(=O)N2 LEHOTFFKMJEONL-UHFFFAOYSA-N 0.000 abstract description 4
- TVWHNULVHGKJHS-UHFFFAOYSA-N Uric acid Natural products N1C(=O)NC(=O)C2NC(=O)NC21 TVWHNULVHGKJHS-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000470 constituent Substances 0.000 abstract description 4
- 229940116269 uric acid Drugs 0.000 abstract description 4
- CVSVTCORWBXHQV-UHFFFAOYSA-N creatine Chemical compound NC(=[NH2+])N(C)CC([O-])=O CVSVTCORWBXHQV-UHFFFAOYSA-N 0.000 abstract 2
- 229960003624 creatine Drugs 0.000 abstract 1
- 239000006046 creatine Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 16
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 15
- 239000002904 solvent Substances 0.000 description 13
- 238000012360 testing method Methods 0.000 description 11
- 238000000502 dialysis Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- 235000010980 cellulose Nutrition 0.000 description 8
- 239000012530 fluid Substances 0.000 description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000002074 melt spinning Methods 0.000 description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 5
- 229920003043 Cellulose fiber Polymers 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 235000002639 sodium chloride Nutrition 0.000 description 4
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 4
- 229920001747 Cellulose diacetate Polymers 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 229920005862 polyol Polymers 0.000 description 3
- 150000003077 polyols Chemical class 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000578 dry spinning Methods 0.000 description 2
- 150000002334 glycols Chemical class 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229940045136 urea Drugs 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- 241000490229 Eucephalus Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 1
- 241001435619 Lile Species 0.000 description 1
- 101800000789 Protease-polymerase p70 Proteins 0.000 description 1
- 101800000786 Protease-polymerase p76 Proteins 0.000 description 1
- 235000018734 Sambucus australis Nutrition 0.000 description 1
- 244000180577 Sambucus australis Species 0.000 description 1
- 208000036366 Sensation of pressure Diseases 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- 229920006221 acetate fiber Polymers 0.000 description 1
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000012457 nonaqueous media Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920003124 powdered cellulose Polymers 0.000 description 1
- 235000019814 powdered cellulose Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- CMDGQTVYVAKDNA-UHFFFAOYSA-N propane-1,2,3-triol;hydrate Chemical compound O.OCC(O)CO CMDGQTVYVAKDNA-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/06—Organic material
- B01D71/08—Polysaccharides
- B01D71/12—Cellulose derivatives
- B01D71/14—Esters of organic acids
- B01D71/16—Cellulose acetate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
- B01D67/0025—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching
- B01D67/0027—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching by stretching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0002—Organic membrane manufacture
- B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
- B01D67/003—Organic membrane manufacture by inducing porosity into non porous precursor membranes by selective elimination of components, e.g. by leaching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
- B01D69/081—Hollow fibre membranes characterised by the fibre diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/08—Hollow fibre membranes
- B01D69/087—Details relating to the spinning process
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
- D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/20—Specific permeability or cut-off range
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Artificial Filaments (AREA)
- External Artificial Organs (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US81292977A | 1977-07-05 | 1977-07-05 | |
| US812,929 | 1977-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1107020A true CA1107020A (en) | 1981-08-18 |
Family
ID=25211003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA306,020A Expired CA1107020A (en) | 1977-07-05 | 1978-06-22 | Cellulose acetate hollow fiber and method for making same |
Country Status (18)
| Country | Link |
|---|---|
| JP (2) | JPS5442420A (da) |
| AT (1) | AT364899B (da) |
| AU (1) | AU519458B2 (da) |
| BE (1) | BE868708A (da) |
| BR (1) | BR7804325A (da) |
| CA (1) | CA1107020A (da) |
| CH (1) | CH632536A5 (da) |
| DD (1) | DD137950A5 (da) |
| DE (1) | DE2827100C2 (da) |
| DK (1) | DK149600C (da) |
| FR (1) | FR2396780A1 (da) |
| GB (1) | GB2000722B (da) |
| IT (1) | IT1107799B (da) |
| MX (1) | MX153159A (da) |
| NL (1) | NL7807225A (da) |
| NO (1) | NO147979C (da) |
| NZ (1) | NZ187610A (da) |
| SE (1) | SE428221B (da) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5063009A (en) * | 1984-11-16 | 1991-11-05 | Teijin Limited | Process for preparation of hollow fibers for fluid separator construction |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1153171A (en) * | 1979-12-17 | 1983-09-06 | David T. Chen | Cellulose semipermeable hollow fibers and method for making same |
| JPS5949806A (ja) * | 1982-09-13 | 1984-03-22 | Teijin Ltd | セルロースエステル系中空糸状分離膜 |
| JPS59199807A (ja) * | 1983-04-20 | 1984-11-13 | Teijin Ltd | 選択透過性セルロ−スエステル系中空繊維の製造方法 |
| JPS59211459A (ja) * | 1983-05-17 | 1984-11-30 | 帝人株式会社 | 血液処理器の滅菌方法 |
| JPS605202A (ja) * | 1983-06-21 | 1985-01-11 | Teijin Ltd | 多孔性セルロ−スエステル系中空繊維およびその製造方法 |
| JPS6343669A (ja) * | 1986-08-08 | 1988-02-24 | 帝人株式会社 | 血液処理器の製造方法 |
| KR100928887B1 (ko) | 2001-06-26 | 2009-11-30 | 도레이 카부시키가이샤 | 열가소성 셀룰로오스 유도체 조성물로 이루어진 섬유 |
| DK2818228T3 (da) * | 2012-02-24 | 2020-09-07 | Toyo Boseki | Hulfibertype cellulosetriacetat-semipermeabel membran, fremgangsmåde til fremstilling af samme, modul og vandbehandlingsfremgangsmåde |
| JP6699172B2 (ja) * | 2014-09-30 | 2020-05-27 | 東レ株式会社 | 分離膜 |
| DE102020102096B4 (de) | 2020-01-29 | 2023-03-23 | Cerdia International GmbH | Celluloseacetathaltiger faserstoff für ein nonwoven-produkt, nonwoven-produkt mit einem solchen faserstoff und verfahren zur herstellung eines solchen faserstoffs |
| US20230397602A1 (en) * | 2020-10-30 | 2023-12-14 | Toyobo Co., Ltd. | Cell cryopreservation hollow fiber membrane |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE342820A (da) * | 1925-09-17 | |||
| FR1456757A (fr) * | 1964-09-02 | 1966-07-08 | Dow Chemical Co | Fibres creuses sélectivement perméables et leur fabrication |
| US3423491A (en) * | 1964-09-02 | 1969-01-21 | Dow Chemical Co | Permselective hollow fibers and method of making |
| US3532527A (en) * | 1966-11-04 | 1970-10-06 | Dow Chemical Co | Permeable separatory membranes |
| US3745202A (en) * | 1971-03-17 | 1973-07-10 | Us Interior | Method of preparing an asymmetric membrane from a cellulose derivative |
| JPS5170316A (ja) * | 1974-12-16 | 1976-06-17 | Teijin Ltd | Seruroosuaseteetochukushino seizohoho |
-
1978
- 1978-06-09 AU AU36971/78A patent/AU519458B2/en not_active Expired
- 1978-06-19 NZ NZ187610A patent/NZ187610A/xx unknown
- 1978-06-21 DE DE2827100A patent/DE2827100C2/de not_active Expired
- 1978-06-22 CA CA306,020A patent/CA1107020A/en not_active Expired
- 1978-06-28 FR FR7819383A patent/FR2396780A1/fr active Granted
- 1978-06-30 IT IT50125/78A patent/IT1107799B/it active
- 1978-06-30 AT AT0477578A patent/AT364899B/de not_active IP Right Cessation
- 1978-07-04 GB GB7828704A patent/GB2000722B/en not_active Expired
- 1978-07-04 JP JP8138378A patent/JPS5442420A/ja active Pending
- 1978-07-04 DK DK302078A patent/DK149600C/da not_active IP Right Cessation
- 1978-07-04 CH CH727578A patent/CH632536A5/fr not_active IP Right Cessation
- 1978-07-04 DD DD78206508A patent/DD137950A5/xx unknown
- 1978-07-04 NO NO782320A patent/NO147979C/no unknown
- 1978-07-04 SE SE7807516A patent/SE428221B/sv not_active IP Right Cessation
- 1978-07-04 MX MX174045A patent/MX153159A/es unknown
- 1978-07-04 BE BE189048A patent/BE868708A/xx not_active IP Right Cessation
- 1978-07-04 NL NL7807225A patent/NL7807225A/xx not_active Application Discontinuation
- 1978-07-05 BR BR7804325A patent/BR7804325A/pt unknown
-
1987
- 1987-02-05 JP JP62025535A patent/JPS62250215A/ja active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5063009A (en) * | 1984-11-16 | 1991-11-05 | Teijin Limited | Process for preparation of hollow fibers for fluid separator construction |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA477578A (de) | 1981-04-15 |
| NO147979C (no) | 1983-07-20 |
| IT1107799B (it) | 1985-11-25 |
| FR2396780A1 (fr) | 1979-02-02 |
| JPS6317922B2 (da) | 1988-04-15 |
| BE868708A (fr) | 1979-01-04 |
| GB2000722A (en) | 1979-01-17 |
| FR2396780B1 (da) | 1983-02-25 |
| DK302078A (da) | 1979-01-06 |
| BR7804325A (pt) | 1979-04-17 |
| DD137950A5 (de) | 1979-10-03 |
| DE2827100C2 (de) | 1983-04-28 |
| NZ187610A (en) | 1980-09-12 |
| SE428221B (sv) | 1983-06-13 |
| MX153159A (es) | 1986-08-14 |
| SE7807516L (sv) | 1979-01-06 |
| NO147979B (no) | 1983-04-11 |
| AU519458B2 (en) | 1981-12-03 |
| NL7807225A (nl) | 1979-01-09 |
| AT364899B (de) | 1981-11-25 |
| AU3697178A (en) | 1979-12-13 |
| DK149600B (da) | 1986-08-04 |
| JPS62250215A (ja) | 1987-10-31 |
| DE2827100A1 (de) | 1979-01-25 |
| CH632536A5 (fr) | 1982-10-15 |
| JPS5442420A (en) | 1979-04-04 |
| DK149600C (da) | 1987-02-09 |
| GB2000722B (en) | 1982-01-27 |
| NO782320L (no) | 1979-01-08 |
| IT7850125A0 (it) | 1978-06-30 |
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