WO2022118943A1 - 多孔質中空糸膜及び完全性試験方法 - Google Patents
多孔質中空糸膜及び完全性試験方法 Download PDFInfo
- Publication number
- WO2022118943A1 WO2022118943A1 PCT/JP2021/044385 JP2021044385W WO2022118943A1 WO 2022118943 A1 WO2022118943 A1 WO 2022118943A1 JP 2021044385 W JP2021044385 W JP 2021044385W WO 2022118943 A1 WO2022118943 A1 WO 2022118943A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hollow fiber
- fiber membrane
- porous hollow
- kpa
- pressure
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 396
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 258
- 238000000034 method Methods 0.000 title claims description 78
- 238000012360 testing method Methods 0.000 title description 80
- 241000700605 Viruses Species 0.000 claims description 73
- 238000001914 filtration Methods 0.000 claims description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 59
- 239000007788 liquid Substances 0.000 claims description 47
- 241000125945 Protoparvovirus Species 0.000 claims description 33
- 239000004627 regenerated cellulose Substances 0.000 claims description 30
- 239000011148 porous material Substances 0.000 claims description 27
- 230000035699 permeability Effects 0.000 claims description 23
- 238000010998 test method Methods 0.000 claims description 21
- 230000007423 decrease Effects 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 5
- 229920000297 Rayon Polymers 0.000 claims description 3
- 239000002964 rayon Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 abstract description 9
- 239000001913 cellulose Substances 0.000 abstract description 9
- 239000000243 solution Substances 0.000 description 37
- 238000005259 measurement Methods 0.000 description 36
- 230000008859 change Effects 0.000 description 22
- 239000012460 protein solution Substances 0.000 description 17
- 238000011156 evaluation Methods 0.000 description 15
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 13
- 238000009987 spinning Methods 0.000 description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 12
- 230000001112 coagulating effect Effects 0.000 description 12
- 239000000706 filtrate Substances 0.000 description 12
- 230000015271 coagulation Effects 0.000 description 11
- 238000005345 coagulation Methods 0.000 description 11
- 108090000623 proteins and genes Proteins 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 10
- 102000004169 proteins and genes Human genes 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 9
- 210000004027 cell Anatomy 0.000 description 8
- 238000009792 diffusion process Methods 0.000 description 7
- 239000010419 fine particle Substances 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 208000015181 infectious disease Diseases 0.000 description 6
- 239000011550 stock solution Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- -1 monoclonal antibody Substances 0.000 description 5
- 238000004382 potting Methods 0.000 description 5
- 238000011085 pressure filtration Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 4
- 238000004113 cell culture Methods 0.000 description 4
- 239000012091 fetal bovine serum Substances 0.000 description 4
- 230000002458 infectious effect Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000000108 ultra-filtration Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 108060003951 Immunoglobulin Proteins 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000701 coagulant Substances 0.000 description 3
- QKSIFUGZHOUETI-UHFFFAOYSA-N copper;azane Chemical compound N.N.N.N.[Cu+2] QKSIFUGZHOUETI-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 102000018358 immunoglobulin Human genes 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 239000002609 medium Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- 108010088751 Albumins Proteins 0.000 description 2
- 102000009027 Albumins Human genes 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 108010039209 Blood Coagulation Factors Proteins 0.000 description 2
- 102000015081 Blood Coagulation Factors Human genes 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 108010047041 Complementarity Determining Regions Proteins 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 241000702619 Porcine parvovirus Species 0.000 description 2
- 108010094028 Prothrombin Proteins 0.000 description 2
- 102100027378 Prothrombin Human genes 0.000 description 2
- 102000007056 Recombinant Fusion Proteins Human genes 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 108010008038 Synthetic Vaccines Proteins 0.000 description 2
- 108010067390 Viral Proteins Proteins 0.000 description 2
- 210000004102 animal cell Anatomy 0.000 description 2
- 229940125644 antibody drug Drugs 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229960000074 biopharmaceutical Drugs 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 239000003114 blood coagulation factor Substances 0.000 description 2
- 229940019700 blood coagulation factors Drugs 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 210000003743 erythrocyte Anatomy 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920002492 poly(sulfone) Polymers 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229940039716 prothrombin Drugs 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- UCSJYZPVAKXKNQ-HZYVHMACSA-N streptomycin Chemical compound CN[C@H]1[C@H](O)[C@@H](O)[C@H](CO)O[C@H]1O[C@@H]1[C@](C=O)(O)[C@H](C)O[C@H]1O[C@@H]1[C@@H](NC(N)=N)[C@H](O)[C@@H](NC(N)=N)[C@H](O)[C@H]1O UCSJYZPVAKXKNQ-HZYVHMACSA-N 0.000 description 2
- 229920001059 synthetic polymer Polymers 0.000 description 2
- 239000013603 viral vector Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- SJIXRGNQPBQWMK-UHFFFAOYSA-N 2-(diethylamino)ethyl 2-methylprop-2-enoate Chemical compound CCN(CC)CCOC(=O)C(C)=C SJIXRGNQPBQWMK-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 241000283690 Bos taurus Species 0.000 description 1
- 108091003079 Bovine Serum Albumin Proteins 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 241000416536 Euproctis pseudoconspersa Species 0.000 description 1
- 108091006020 Fc-tagged proteins Proteins 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229930182555 Penicillin Natural products 0.000 description 1
- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 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
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229940050528 albumin Drugs 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000000611 antibody drug conjugate Substances 0.000 description 1
- 229940049595 antibody-drug conjugate Drugs 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000006143 cell culture medium Substances 0.000 description 1
- 239000006285 cell suspension Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 210000004978 chinese hamster ovary cell Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- ZBKIUFWVEIBQRT-UHFFFAOYSA-N gold(1+) Chemical compound [Au+] ZBKIUFWVEIBQRT-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000005847 immunogenicity Effects 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 238000011016 integrity testing Methods 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229940049954 penicillin Drugs 0.000 description 1
- 229920002338 polyhydroxyethylmethacrylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000008279 sol Substances 0.000 description 1
- 229960005322 streptomycin Drugs 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 210000003501 vero cell Anatomy 0.000 description 1
- 230000009385 viral infection Effects 0.000 description 1
- 239000008215 water for injection Substances 0.000 description 1
Images
Classifications
-
- 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
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
- B01D65/104—Detection of leaks in membrane apparatus or modules
-
- 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
- B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
-
- 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
- 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
- B01D71/10—Cellulose; Modified cellulose
-
- 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
- D01F2/02—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from solutions of cellulose in acids, bases or salts
- D01F2/04—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from solutions of cellulose in acids, bases or salts from cuprammonium solutions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/02—Details relating to pores or porosity of the membranes
- B01D2325/022—Asymmetric membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/02—Details relating to pores or porosity of the membranes
- B01D2325/022—Asymmetric membranes
- B01D2325/0231—Dense layers being placed on the outer side of the cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/04—Characteristic thickness
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2325/00—Details relating to properties of membranes
- B01D2325/24—Mechanical properties, e.g. strength
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
Definitions
- the present invention relates to a porous hollow fiber membrane containing regenerated cellulose and a method for testing the completeness of a membrane module filled with the porous membrane.
- a virus removal / inactivation process has been introduced in the manufacturing process as a measure to improve the safety against viruses.
- the virus removal method by filtration using a porous membrane is an effective method capable of reducing the virus without denaturing useful proteins.
- Porous membranes containing regenerated cellulose are characterized by their excellent hydrophilicity and less adsorption of proteins to membranes, and are widely used for virus removal of various biologics (for example, Patent Document 1, Patent Document 1, See 2.).
- the virus removal method by filtration using a porous membrane requires a completeness test of the membrane module to confirm that the virus removal membrane functioned effectively in the virus removal process in order to ensure the safety of the manufactured drug. Become.
- a leak test for determining an allowable pinhole diameter for the desired virus removal performance and confirming that no defect larger than the pinhole diameter has occurred Alternatively, a diffusion test may be mentioned.
- a virus-removing membrane having a diameter of about 20 nm for the purpose of removing parvovirus pinholes that affect the deterioration of virus-removing property are minute, so it is necessary to set a high test pressure in a leak test or the like.
- the integrity test can be performed by such a method only for a porous membrane made of polyvinylidene fluoride or a polysulfone-based synthetic polymer.
- One of the problems of the present invention is to provide a porous hollow fiber membrane containing regenerated cellulose, which enables evaluation of high fine particle removal performance by a leak test or the like.
- Another object of the present invention is to provide a completeness test method by a leak test method for a membrane module containing the porous hollow fiber membrane.
- the pinholes that affect the deterioration of virus removal property are minute, so such minute pinholes.
- a high test pressure such as a leak test
- the integrity test can be performed by such a method only for a porous membrane made of polyvinylidene fluoride or a polysulfone-based synthetic polymer. If the test pressure is set high for the regenerated cellulose membrane in order to improve the detection accuracy of minute pinholes, there is a problem that the regenerated cellulose membrane cannot withstand the test pressure.
- the elastic limit pressure of a porous hollow fiber membrane containing regenerated cellulose is set to a specific value or more, and includes such regenerated cellulose.
- the biologic-containing solution contains immunoglobulin (polyclonal antibody), albumin, blood coagulation factor, prothrombin complex, medium, monoclonal antibody, antibody drug conjugate, vaccine, recombinant protein, viral vector, DNA, and RNA.
- immunoglobulin polyclonal antibody
- albumin albumin
- prothrombin complex medium
- monoclonal antibody antibody drug conjugate
- vaccine recombinant protein
- viral vector DNA, and RNA.
- the complete test method for a membrane module filled with the porous hollow fiber membrane according to any one of [1] to [10].
- the membrane module has an outer surface side space in contact with the outer surface of the porous hollow fiber membrane and an inner surface side space in contact with the inner surface of the porous hollow fiber membrane. Filling the outer surface side space with liquid and The space on the inner surface side is pressurized with air so that the differential pressure between the membranes of the porous hollow fiber membrane is larger than 98 kPa and the pressure is in the range below the elastic limit pressure of the porous hollow fiber membrane. Integrity test methods including.
- a complete test method for a membrane module filled with a porous hollow fiber membrane of regenerated cellulose The membrane module has an outer surface side space in contact with the outer surface of the porous hollow fiber membrane and an inner surface side space in contact with the inner surface of the porous hollow fiber membrane. Pressurizing the inner surface side space so that the differential pressure between the membranes of the porous hollow fiber membrane is 98 kPa or more and the pressure is in the range of the elastic limit pressure or less of the porous hollow fiber membrane. Integrity test methods including.
- a porous hollow fiber membrane containing regenerated cellulose which enables evaluation of high virus removal performance by a leak test or the like. Further, according to the present invention, there is provided a method for integrity testing in which a leak test method is performed on the porous hollow fiber membrane.
- FIG. 1 It is a schematic diagram of the membrane cross section of a porous hollow fiber membrane. The relationship between the inner diameter (R) and the film thickness (t) of the porous hollow fiber membrane is shown. It is a graph used for determination of the elastic limit pressure of the porous hollow fiber membrane which concerns on Example 1.
- FIG. It is an observation image by the scanning microscope of the porous hollow fiber membrane which concerns on Example 1.
- FIG. It is an observation image by the scanning microscope of the porous hollow fiber membrane which concerns on Example 2.
- FIG. It is an observation image by the scanning microscope of the porous hollow fiber membrane which concerns on Example 3.
- FIG. It is an observation image by the scanning microscope of the porous hollow fiber membrane which concerns on Example 4.
- FIG. It is a graph which shows the correlation between the ratio (R / t) of the inner diameter (R) with respect to the film thickness (t) of a porous hollow fiber membrane, and the elastic limit pressure.
- the present invention will be described in detail in accordance with a specific embodiment (hereinafter referred to as “the present embodiment”).
- the present invention is not bound by the following embodiments of the present invention, and can be carried out in any form as long as the gist of the present invention is not deviated.
- porous hollow fiber membrane containing regenerated cellulose according to the present embodiment will be described.
- the porous hollow fiber membrane according to the present embodiment is a hollow membrane having a porous structure containing a large number of pores for permeating or capturing a substance.
- the shape of the porous hollow fiber membrane is not particularly limited, but it can have a continuous cylindrical shape.
- the surface of the porous hollow fiber membrane located inside the cylinder is referred to as an inner surface, and the surface located outside the cylinder is referred to as an outer surface.
- the porous hollow fiber membrane according to the present embodiment is not particularly limited as long as it is a porous hollow fiber membrane containing regenerated cellulose.
- the regenerated cellulose is not particularly limited as long as it is a cellulose regenerated by another chemical treatment after being shaped with a stock solution in which natural cellulose is dissolved by a chemical treatment, and is not particularly limited.
- a method) or a method of producing cellulose acetate by keratinizing it with an alkali (kengerization method) can be exemplified.
- the porous hollow fiber membrane according to the present embodiment may contain a component other than regenerated cellulose, and a part of the regenerated cellulose may be modified.
- regenerated cellulose in which the cellulose hydroxyl group is esterified and modified, or partially crosslinked regenerated cellulose and the like are exemplified.
- the surface of the porous hollow fiber membrane may be coated with a polymer film.
- polystyrene resin examples include polyhydroxyethyl methacrylate, a copolymer of 2-hydroxyethyl methacrylate and acrylamide, polymethoxyethyl acrylate, a copolymer of 2-hydroxyethyl methacrylate and diethylaminoethyl methacrylate, and 2-methacryloyl.
- Copolymer of oxyethylphosphorylcholine and n-butylmethacrylate copolymer of 2- (N-3-sulfopropyl-N, N-dimethylammonium) ethylmethacrylate and n-butylmethacrylate, hydroxypropylcellulose, polyvinylpyrrolidone, or Examples thereof include a copolymer of vinylpyrrolidone and vinyl acetate.
- the porous hollow fiber membrane according to the present embodiment may be a porous hollow fiber membrane capable of evaluating high virus removal performance in a completeness test such as a leak test, or enabling detection of minute pinholes.
- the present invention is not particularly limited, and examples thereof include a porous hollow fiber membrane exhibiting an elastic limit pressure of a specific value or higher. Examples of the elastic limit pressure include 200 kPa or more, 210 kPa or more, 220 kPa or more, 230 kPa or more, 240 kPa or more, or 250 kPa or more.
- the elastic limit pressure 215 kPa or more, 225 kPa or more, 235 kPa or more, 245 kPa or more, 255 kPa or more, 270 kPa or more, or 280 kPa or more is exemplified.
- the upper limit of the elastic limit pressure is not particularly limited as long as it can be realistically applied, but is 1000 kPa or less, 900 kPa or less, 800 kPa or less, 700 kPa or less, 600 kPa or less, 500 kPa or less, 450 kPa or less, 400 kPa or less, 350 kPa or less.
- Or 300 kPa or less is exemplified.
- the elastic limit pressure is defined as the pressure at which the expansion observed due to the change in the outer diameter of the hollow fiber membrane due to the increase in pressure when pressurized with air from the inner surface side of the hollow fiber membrane deviates from the linear change. ..
- the deviation from the linear change in hollow fiber membrane expansion is caused by the plastic deformation of the hollow fiber membrane.
- the elastic limit pressure of the porous hollow fiber membrane according to the present embodiment is measured in a state where the porous hollow fiber membrane is moistened with water.
- the leak test is a method for detecting the presence or absence of large pores (pinholes) other than the original pore size distribution of the porous membrane.
- the relationship between the pinhole diameter at a temperature of 20 ° C., the test pressure, and the gas flow rate flowing out of the pinhole is given by the choked flow equation (1). Therefore, it is possible to calculate the pinhole diameter from the value of the test pressure, the value of the gas flow rate flowing out of the pinhole, and the equation (1).
- Q 30 ⁇ R 2 (P 1 +0.1) (1) (In the formula, Q: flow rate (mL / min), R: pinhole diameter ( ⁇ m) at a temperature of 20 ° C., P 1 : test pressure (MPa))
- the air flow rate at which the presence of pinholes can be determined in the leak test is, for example, 0.2 mL / min or more.
- the range is 5 mL / min or less, and the minimum detectable pinhole diameter is 2.7 ⁇ m or more and 4.2 ⁇ m or less at a set pressure of 200 kPa, 2.5 ⁇ m or more and 3.9 ⁇ m or less at 250 kPa, and 300 kPa.
- the range is 2.3 ⁇ m or more and 3.6 ⁇ m or less.
- the set pressure for pressurizing the porous hollow fiber membrane is set in a region larger than 98 kPa in the leak test, and pinholes smaller than about 3 ⁇ m in diameter are detected. From the viewpoint of enabling, it is preferably 200 kPa or more, preferably 220 kPa or more, more preferably 250 kPa or more, and further preferably 300 kPa or more.
- the upper limit of the elastic limit pressure of the porous hollow fiber membrane according to the present embodiment is preferably not more than a certain value from the viewpoint of flexibility required when the porous hollow fiber membrane is used as a filter module, and 800 kPa or less is exemplified. 700 kPa or less is preferable, 600 kPa or less is more preferable, 500 kPa or less is further preferable, and 400 kPa or less is particularly preferable.
- the differential pressure between the membranes of the porous hollow fiber membrane made of regenerated cellulose of the prior art at the time of filtration is about 98 kPa. It is also preferable from the viewpoint that it can be set to exceed 150 kPa.
- the intermembrane differential pressure is preferably set to about 75% or less of the elastic limit pressure of the porous hollow fiber membrane according to the present embodiment, and therefore, the more preferable intermembrane differential pressure during filtration is 165 kPa or more, 188 kPa or more, and 225 kPa. That is all.
- differential pressure between membranes during filtration 150 kPa or more, 200 kPa or more, and 250 kPa or more are exemplified.
- the upper limit of the differential pressure between membranes during filtration is not particularly limited as long as it can be realistically applied, but is 1000 kPa or less, 900 kPa or less, 800 kPa or less, 700 kPa or less, 600 kPa or less, 500 kPa or less, 450 kPa or less, 400 kPa.
- 350 kPa or less, or 300 kPa or less is exemplified.
- the differential pressure between membranes is treated as synonymous with the filtration pressure of low-pressure filtration under the condition that a particularly high filtration exhaust pressure is not applied.
- the object to be filtered may be pumped so that the pressure applied to the porous hollow fiber membrane becomes a constant pressure, and the elastic limit pressure of the porous hollow fiber membrane may not be exceeded.
- the object to be filtered may be filtered at a constant speed within the range.
- the intermembrane differential pressure of the porous hollow fiber membrane according to the present embodiment is the differential pressure between the pressure on the inner surface side of the porous hollow fiber membrane and the pressure on the outer surface side of the porous hollow fiber membrane.
- Point to. An example is a value obtained by subtracting the pressure on the outer surface side of the porous hollow fiber membrane from the pressure on the inner surface side of the porous hollow fiber membrane.
- the porous hollow fiber membrane according to the present embodiment preferably has a ratio (R / t) of an inner diameter (R ( ⁇ m)) to a film thickness (t ( ⁇ m)) of 8.4 or less.
- the inner diameter (R) and the film thickness (t) are measured from a cross-sectional image obtained by cutting a dry hollow fiber into round slices, the inner diameter is the inner surface diameter of the hollow fiber, and the film thickness is the inner surface of the hollow fiber. And the vertical distance between the outer surface.
- the inner diameter (R) and the film thickness (t) indicate the values measured in a dry state.
- the present inventors Based on the profile of the porous hollow fiber membrane, the present inventors have obtained the thickness of the porous hollow fiber membrane for the porous hollow fiber membrane containing regenerated cellulose suitable for a filtration target having a particle size of less than 20 nm to 100 nm. It was found that there is a specific correlation between R / t, which is the ratio of the inner diameter (R) to (t), and the elastic limit pressure (Examples 1 to 4 and Comparative Examples 1 to 2 described later, and FIG. 7). reference.). From the viewpoint of achieving an elastic limit pressure of 200 kPa or more for the porous hollow fiber membrane, the upper limit of R / t is preferably 8.4 or less.
- the more preferable range of R / t is 8.0 or less, and the more preferable range is 7.7 or less, corresponding to the more preferable lower limit value of the elastic limit pressure described above.
- the lower limit of R / t is 2.0, that is, the inner diameter is 2 with respect to the film thickness, from the viewpoint of stably producing the hollow fiber shape and satisfying the balance between the supply flow rate and the permeation flow rate as the hollow fiber filtration membrane. It is preferably double or more.
- the film thickness of the porous membrane according to this embodiment is preferably in the range of 20 ⁇ m or more and 70 ⁇ m or less. From the viewpoint of convenience in designing a region for capturing minute substances by the sieving effect as a porous film, the film thickness is preferably 20 ⁇ m or more. Further, from the viewpoint of the convenience of setting the permeation performance of the porous membrane to be high, the film thickness is preferably 70 ⁇ m or less.
- the film thickness of the porous film is more preferably in the range of 30 ⁇ m or more and 60 ⁇ m or less, and further preferably in the range of 40 ⁇ m or more and 50 ⁇ m or less.
- the porous hollow fiber membrane according to the present embodiment is preferably regenerated cellulose obtained from the cuprammonium rayon method from the viewpoint of achieving both the porous structure required for the virus removing membrane and the excellent hydrophilicity.
- An example of a method for producing a porous hollow fiber membrane according to the present embodiment using the cuprammonium method will be described below.
- a spinning stock solution in which cellulose is dissolved in a copper-ammonia solution and has a cellulose concentration of 6% to 8% by mass, an ammonia concentration of 4% by mass to 5% by mass, a copper concentration of 2% by mass to 3% by mass, and an acetone concentration of 30% by mass.
- An internal coagulation solution which is an aqueous solution having an ammonia concentration of 0.5% by mass to 1.0% by mass and an aqueous solution having an acetone concentration of 20% to 40% by mass and an ammonia concentration of 0.2% by mass or less.
- the undiluted spinning solution may contain an inorganic salt such as sodium sulfate in the range of about 0.03% by mass to 0.1% by mass.
- the undiluted spinning solution is discharged from the annular double spinner at a rate of 2 mL / min to 5 mL / min, and at the same time, the internal coagulant is 0.3 mL / min from the central spun outlet provided in the center of the annular double spinner. It is preferable to discharge at a rate of 1 to 3.0 mL / min.
- the stock solution discharge rate is set.
- the internal coagulation liquid rate is in the range of 2.5 mL / min or more and 4 mL / min or less, and the internal coagulation liquid rate is in the range of 0.3 mL / min or more and 1.6 mL / min or less.
- a more preferred method is to set the internal coagulant rate in the range of 0.3 mL / min or more and 1.4 mL / min or less.
- Immersion of the spinning stock solution and the internal coagulating liquid in the external coagulating liquid is a method of immersing the spinning stock solution and the internal coagulating liquid in the external coagulating liquid stored in the coagulation bath.
- a method of advancing solidification while using a spinning rotor a method of using a U-shaped thin tube can be mentioned. From the viewpoint of realizing a film structure having a high fine particle removal rate by suppressing stretching in the solidification process, a method using a U-shaped capillary tube is preferable.
- the temperature of the external coagulating liquid is selected from the range of 25 ° C. or higher and 45 ° C. or lower. It is preferable to control at the temperature of. A more preferable temperature range is 30 ° C. or higher and 45 ° C. or lower, and a more preferable range is 35 ° C. or higher and 45 ° C. or lower.
- the wound hollow fiber membrane is immersed in a dilute sulfuric acid aqueous solution of 2% by mass to 10% by mass, and then washed with pure water to regenerate cellulose, and further, the water content of the hollow fiber membrane is hydrated with an organic solvent such as methanol or ethanol.
- an organic solvent such as methanol or ethanol.
- the filtration method according to the present embodiment includes filtering the solution to be filtered with the porous hollow fiber membrane according to the present embodiment.
- the porous hollow fiber membrane according to the present embodiment is a method of filtering in a direction in which a liquid flows from the inner surface side to the outer surface side of the hollow fiber in order to effectively capture fine particles in the aqueous solution (internal pressure). It is preferable to adopt the filtration method), and it is preferable that the pore diameter on the inner surface is larger than the pore diameter on the outer surface from the viewpoint of achieving a high flow velocity and suppressing clogging of the porous membrane. Further, from the viewpoint of improving the capture performance of fine particles and suppressing the influence of clogging, in order to have an inclined structure in which the pore diameter decreases from the inner surface side to the outer surface side and to capture the fine particles to be removed.
- the pore diameter is the size of the pore portion in the image obtained by observing the inner surface, the outer surface, or the cross section of the hollow fiber membrane sliced with an optical microscope or a scanning electron microscope. It is preferable that the degree of difference due to comparison is clear enough to be visually recognized by a microscope image.
- the porous hollow fiber membrane according to the present embodiment can be used for removing a virus, which is one of the removal of fine particles, and is particularly preferably used as a removal membrane for parvovirus, which is positioned as a small virus among viruses. can.
- the water permeability at a filtration pressure of 27 kPa and 37 ° C. is 10 L / (m 2 ⁇ hr) or more and 50 L / (m 2 ⁇ hr) or less. Is preferable.
- the water permeation amount is the flow rate per unit time when water is filtered by the internal pressure filtration method, and the virus removal membrane designed to have a high water permeation amount can perform the virus removal step of the biological product in a short time.
- the water permeability is a measure showing the average pore size of the entire porous hollow fiber membrane, and is designed according to the size of the virus particles to be removed. Therefore, from the viewpoint of ensuring the capture performance of parvovirus smaller than 20 nm in diameter, it is more preferably 10 L / (m 2 ⁇ hr) or more and 50 L / (m 2 ⁇ hr) or less, and 15 L / (m 2 ⁇ hr) or less.
- the water permeation amount is specified under the conditions of a filtration pressure of 27 kPa and 37 ° C. because it is a general condition for measuring the water permeation amount when calculating the average pore size (nm) of the porous membrane in the technical region.
- the water permeability of the porous hollow fiber membrane according to the present embodiment is shown under the filtration conditions of a filtration pressure of 98 kPa and 25 ° C., it is preferably 20 L / (m 2 ⁇ hr) or more and 100 L / (m 2 ⁇ hr) or less. , 30 L / (m 2 ⁇ hr) or more and 85 L / (m 2 ⁇ hr) or less is more preferable.
- the porous hollow fiber membrane according to the present embodiment is used as a parvovirus removing membrane, it is not particularly limited as long as the bubble point is 1.2 MPa or more.
- the bubble point is a scale indicating the size of the maximum pore of the porous hollow fiber membrane.
- the lower limit of the bubble point is preferably 1.3 MPa or more, more preferably 1.4 MPa or more, still more preferably 1.5 MPa or more.
- the upper limit of the bubble point is preferably 2.4 MPa or less, more preferably 2.3 MPa or less, still more preferably 2.2 MPa or less.
- one end of the porous hollow fiber membrane according to the present embodiment is sealed, and a test module capable of being pressurized with air or nitrogen from the other end is created, and the test module is subjected to surface tension. It refers to the pressure when the gas flow rate that leaks when the pressure is increased while immersed in a low-fluorine liquid is 2.4 mL / min.
- the virus removing property of the porous hollow fiber membrane according to the present embodiment is 50% tissue culture of the original solution containing the virus and the filtrate. It is evaluated as a virus removal rate (LRV), which is a logarithmic value of the ratio of the infection value (TCID 50 / mL).
- the original solution containing parvovirus containing 6.0 TCID 50 / mL or more and 8.0 TCID 50 / mL or less is subjected to an intermembrane differential pressure of 196 kPa, 150 L /. It is preferable that the parvovirus removal rate when filtered in an amount of m 2 is 4.0 or more. Considering the correspondence to a larger amount of filtration and the influence on the fluctuation of the filtration pressure, the parvovirus removal rate under the same conditions is more preferably 4.5 or more, and further preferably 5.0 or more.
- the LRV is preferably measured using the virus-containing protein solution described in (5-A) in the LRV measuring method described in Example (5) described later.
- the biological preparation contained in the solution to be purified is not particularly limited, but immunoglobulin (polyclonal antibody), albumin, blood coagulation factor. , Prothrombin complex, medium, monoclonal antibody, antibody drug complex, vaccine, recombinant protein, viral vector, DNA, RNA and the like can be exemplified.
- the target of purification of the porous membrane hollow fiber membrane may be a protein such as an antibody.
- the antibody may be a human antibody or an antibody protein derived from a mammal such as a cow or mouse other than human.
- the antibody may be a chimeric antibody protein with human IgG and a humanized antibody.
- the chimeric antibody with human IgG is an antibody in which the variable region is derived from a non-human organism such as mouse, but the other constant region is replaced with a human-derived immunoglobulin.
- the complementarity-determining region CDR
- the other framework region framework region
- Humanization is further reduced in immunogenicity than chimeric antibodies.
- the antibody class (isotype) and subclass are not particularly limited.
- antibodies are classified into five classes, IgG, IgA, IgM, IgD, and IgE, depending on the structure of the constant region.
- the antibody targeted for purification by the porous membrane hollow fiber membrane according to the embodiment may be in any of the five classes.
- IgG has four subclasses of IgG1 to IgG4, and IgA has two subclasses of IgA1 and IgA2.
- the subclass of the antibody to be purified by the porous membrane hollow fiber membrane according to the embodiment may be any.
- An antibody-related protein such as an Fc fusion protein in which a protein is bound to an Fc region can also be included in the antibody to be purified by the porous membrane hollow fiber membrane according to the embodiment.
- antibodies can also be classified by origin.
- the antibody to be purified by the porous membrane hollow fiber membrane according to the embodiment may be a natural human antibody, a recombinant human antibody produced by a gene recombination technique, a monoclonal antibody, or a polyclonal antibody.
- the monoclonal antibody is preferable as the antibody to be purified by the porous membrane hollow fiber membrane according to the embodiment from the viewpoint of demand and importance as an antibody drug, but the antibody is not limited thereto.
- the antibody examples include a monoclonal antibody or a polyclonal antibody containing any one of IgM, IgD, IgG, IgA, or IgE. Further, the antibody may be derived from, for example, a plasma product or a cell culture medium. When an antibody is obtained by cell culture, animal cells or microorganisms can be used as cells. The type of animal cell is not particularly limited, but CHO cell, Sp2 / 0 cell, NS0 cell, Vero cell, PER. Examples include C6 cells. The type of microorganism is not particularly limited, and examples thereof include Escherichia coli and yeast.
- the porous membrane hollow fiber membrane according to the present embodiment When used as a membrane for removing the virus contained in the protein-containing solution to be purified by filtration, it has a high intermembrane differential pressure and a high virus removal rate. It becomes possible to filter the protein-containing solution.
- the intermembrane differential pressure is preferably set to about 75% or less of the elastic limit pressure of the porous hollow fiber membrane according to the present embodiment, and therefore, the intermembrane differential pressure at the time of more preferable filtration is 150 kPa or more, 165 kPa or more, and 188 kPa. As mentioned above, 200 kPa or more, 225 kPa or more, or 250 kPa or more is exemplified.
- the upper limit of the differential pressure between membranes is not particularly limited as long as it can be applied realistically, but is 1000 kPa or less, 900 kPa or less, 800 kPa or less, 700 kPa or less, 600 kPa or less, 500 kPa or less, 450 kPa or less, 400 kPa or less, 350 kPa.
- the following, or 300 kPa or less is exemplified.
- the upper limit of the filtration time is not particularly limited, and examples thereof include 7 days or less, 6 days or less, 5 days, 2 days or less, 4 days or less, and 3 days or less.
- porous membrane hollow fiber membrane according to the present embodiment when used in the virus removal step, another purification step may be carried out in the first stage, the second stage, or both.
- instruments used in another purification step include protein A carriers, ion exchange chromatography, depth filters, ultrafiltration membranes, prefilters, activated carbon and the like.
- the membrane module filled with the porous hollow fiber membrane is composed of a tubular body, a lid body, and a potting agent.
- the hollow fiber membrane contained inside the tubular body is joined to the tubular body by a potting agent at both ends thereof, and is surrounded by the inner surface of the tubular body, the outer surface of the hollow fiber, and the surface of the potting agent.
- a space in contact with the outer surface of the hollow fiber (hereinafter referred to as "outer surface side space”) is formed, and the outer surface side space is communicated to the outside world by a nozzle having a cylindrical body.
- two lids are joined so as to form a certain space at both ends where the hollow fiber membrane and the tubular body are joined by a potting agent, and the inner surface of the lid and the inner surface of the hollow fiber are joined.
- a space in contact with the inner surface of the hollow fiber surrounded by the other surface of the potting agent (hereinafter referred to as "inner surface side space") is formed, and the inner surface side space is communicated to the outside world by the nozzle of the lid. ing.
- the membrane module filled with the porous hollow yarn membrane moves the liquid from the inner surface side space to the outer surface side space through the membrane by passing the liquid under pressure from the nozzle of the lid. , It can be used for filtration by collecting the liquid from the nozzle of the tubular body.
- the outer surface side space where the membrane module is in contact with the outer surface of the porous hollow fiber membrane and the inner surface side space where the membrane module is in contact with the inner surface of the porous hollow fiber membrane It has two spaces, (1) The step of filling the outer surface side space with a liquid, and (2) the differential pressure between the membranes of the porous hollow fiber membrane is larger than 98 kPa and is within the elastic limit pressure of the porous hollow fiber membrane. As described above, the step of pressurizing the inner surface side space with air is included.
- the liquid may be filled from the nozzle of the tubular body of the membrane module, or from the nozzle of the lid.
- the liquid may be added and filled by the same method as the filtration operation.
- the membrane module is placed in an upright position, and the space on the inner surface side is filled with liquid at a flow rate of about 2 L / (m 2 ⁇ min) from the nozzle of the lower lid of the membrane module.
- the inner upper side of the two nozzles of the cylindrical body is opened, and the outer surface side space is filled with the liquid by a filtration operation having a flow rate of about 1 L / (m 2 ⁇ min).
- the liquid in the space on the inner surface side is discharged from the nozzle of the lower lid of the membrane module.
- the liquid used in the membrane module integrity test method according to the present embodiment is not particularly limited as long as it does not change the membrane structure of the porous hollow fiber membrane according to the present embodiment, but before or after the use of the membrane module.
- water that can be easily replaced with the liquid to be filtered. If water contains foreign matter or micro air, it may block part of the structure of the porous hollow fiber membrane and affect the results of the completeness test, so water is an ultrafiltration membrane and reverse osmosis. It is preferable to use a membrane or a membrane treated with an ultrafiltration membrane or the like.
- a fluorocarbon-based liquid having a low surface tension may be used.
- the pressure for pressurizing the air in the inner surface side space is such that the intermembrane differential pressure of the porous hollow fiber membrane is larger than 98 kPa and the elastic limit of the porous hollow fiber.
- the pressure is in the range below the pressure.
- pinholes in the porous hollow fiber membrane can be detected accurately by increasing the pressure that pressurizes the air in the space on the inner surface side.
- pressurizing with a pressure exceeding the elastic limit pressure of the porous hollow fiber membrane causes plastic deformation of the porous hollow fiber membrane, it is preferable to perform a test at or below the elastic limit pressure, and the elastic limit pressure is preferable. It is more preferable to test at about 85% or less, and further preferably about 75% or less.
- parvovirus removal membrane In the completeness test of the parvovirus removal membrane, it is important to determine the parvovirus removal rate of 4.0 or more, and the pinhole size of the porous hollow fiber membrane in the membrane module allowed there is experimental depending on the membrane area. It is about 3 ⁇ m for 0.001 m 2 , about 6.5 ⁇ m for 0.01 m 2 , about 12.5 ⁇ m for 0.1 m 2 , and about 33 ⁇ m for 1 m 2 .
- the accuracy of pinhole determination is limited, and when the set pressure is 200 kPa, the minimum pinhole that can be detected.
- the diameter is in the range of 2.7 ⁇ m or more and 4.2 ⁇ m or less, 2.5 ⁇ m or more and 3.9 ⁇ m or less at 250 kPa, and 2.3 ⁇ m or more and 3.6 ⁇ m or less at 300 kPa, and the completeness test of the membrane module with a small area. It is preferable that the set pressure is 200 kPa or more.
- a method for determining the completeness test method of the membrane module As a method for determining the completeness test method of the membrane module according to the present embodiment, a method of visually observing bubbles generated from the porous hollow fiber membrane and a pressure fluctuation value in one of the two spaces of the membrane module. It is preferable to select one of the methods for measuring the amount of air inflow required to keep the pressure in one of the spaces constant.
- the porous hollow fiber has defects such as pinholes. This is a method of visually observing the open air bubbles generated in the case of.
- a set pressure of at least 150 kPa or more is set. It is preferable to adopt a method of visually observing that no continuous bubbles are generated in the outer surface side space for 30 seconds, preferably 60 seconds when the inner surface side space is pressurized.
- the determination method for measuring the pressure fluctuation value in either the outer surface side space or the inner surface side space of the membrane module, or any of them A determination method for measuring the amount of air inflow required to maintain a constant pressure in one of the spaces will be described.
- a circuit is formed in which the membrane module is placed in an upright position, the inner surface side space is pressurized with air from the nozzle of the upper lid of the membrane module, and the air leaking from the upper nozzle of the tubular body is derived. Then, according to each method, a regulator for adjusting the pressure on the pressurizing side, a flow meter, a pressure sensor, and a flow meter on the lead-out side are arranged. Further, the container may be arranged so as to communicate with the nozzle of the lid below the membrane module in order to mitigate the influence of the liquid remaining in the porous membrane during the measurement.
- the changes in pressure and air flow rate during pressurization of the membrane module measured by these methods are the changes due to the amount of air diffusion inside the porous hollow fiber membrane and the changes due to defects such as pinholes in the porous hollow fiber. , Is a combined change.
- the determination value (threshold value) of the pressure fluctuation value or the flow rate fluctuation value for determining whether or not a defect such as a pinhole of the porous hollow fiber is generated is experimentally obtained and is not particularly limited.
- the threshold value can be appropriately set by performing a leak test on a plurality of (for example, nine) membrane modules and considering the average value and deviation of the pressure fluctuation value or the flow rate fluctuation value.
- a pressurizing device equipped with a microcoupler (MC-10SM manufactured by Nitto Koki Co., Ltd.) so that a pressure control valve, a pressure gauge, and a microcoupler of a measurement module can be connected to the pipe for supplying compressed air.
- a pressure control valve a pressure gauge
- a microcoupler of a measurement module can be connected to the pipe for supplying compressed air.
- the measuring module is connected to a pressurizing device while immersed in water and compressed air is supplied to the hollow portion by increasing the pressure at 20 kPa intervals
- the outer diameter of the hollow thread is measured by a dimension measuring instrument (manufactured by KEYENCE, Inc.). Model LS-9006M).
- the outer diameter change rate (%) due to each measured pressure is calculated by the following formula, and a graph is created in which the X-axis is the measured pressure (kPa) and the Y-axis is the outer diameter change rate (%).
- Outer diameter change rate (%) (D / D 0-1 ) x 100 (In the formula, D: outer diameter at each pressure ( ⁇ m), D 0 : initial value of outer diameter under no pressure ( ⁇ m))
- the straight line according to the derived formula is added to the above graph, and the highest pressure among the pressures in the plot that does not exceed the outer diameter change rate of the straight line is taken as the elastic limit pressure of the measurement module.
- the test is performed on 6 or more measurement modules, and the average value is taken as the elastic limit pressure of the porous hollow fiber membrane.
- a cross-sectional section of the porous hollow fiber membrane is prepared, and an image taken at 200 times using a microscope (Keyence, model VHX-5000) is prepared and displayed on the image.
- the film thickness of the hollow fiber cross section of the above is measured at least 20 points over the entire circumference, and the average value is taken as the measured value of the film thickness.
- the inner diameter is calculated as the diameter when the area of the hollow portion of the hollow fiber cross section of the same image is obtained by image processing and approximated to a circle.
- the water permeability measuring device is a mechanism for discharging water at a constant pressure from a conduit to which a polyethylene tube of a measurement module can be connected, a mechanism for quantifying the amount of discharged liquid with high accuracy, and a mechanism for measuring the quantification time of the amount of discharged liquid.
- the measurement module is immersed in a water bath at 37 ° C., the conduit portion of the water permeability measuring machine is connected to the polyethylene tube of the measurement module, and the time for passing 1 mL of water at 37 ° C. at 27 kPa is measured. From the filtration membrane area calculated based on the result of the inner diameter ( ⁇ m) measurement of the porous membrane hollow fiber membrane prepared under the same conditions as the porous hollow fiber membrane of the measurement module, and the measured value of 1 mL water flow time. Membrane area 1 m 2 , water permeation per hour (L / (m 2 ⁇ hr) is calculated.
- the test is performed on 3 or more evaluation modules, and the average value is taken as the water permeability of the porous hollow fiber membrane.
- the bubble point measuring device is equipped with a pressure adjusting mechanism and a pressure display mechanism that pressurize the inner surface side of the porous hollow fiber membrane through a metal coupler to gradually increase the pressure, and the gas flow rate flowing out from the tube of the test module. It is equipped with a flow meter that can measure.
- the metal coupler of the test module is attached to the end of the pressurizing mechanism, the line of the flow rate measuring mechanism is attached to the end of the tube of the test module, and the gas flow rate that leaks when the pressure is gradually increased is 2.4 mL / The pressure at the minute (MPa) is detected.
- the test is performed with three or more test modules, and the average value is used as the bubble point value.
- the solution to be filtered is prepared by the method described in (5-A) or (5-B) below.
- a virus-containing protein solution To prepare a virus-containing protein solution, first, use a polyclonal antibody (human IgG) (venoglobulin-IH, manufactured by Benesis) and water for injection (Otsuka Pharmaceutical Co., Ltd.) so that the antibody concentration becomes 1 mg / mL. ) To obtain an antibody solution diluted with. Further, the salt concentration is adjusted to 0.1 mol / L using a 1 mol / L NaCl aqueous solution. Further, the hydrogen ion index (pH) is adjusted to 4.0 using 0.1 mol / L HCl or 0.1 mol / L NaOH, and this is used as a protein solution. To the obtained protein solution, 1.0 vol% of porcine parvovirus (PPV, Japan Society for Animal Biologics) is added and stirred well to obtain a virus-containing protein solution.
- porcine parvovirus PV, Japan Society for Animal Biologics
- the filtration amount is 150 L when the virus-containing protein solution (5-A) is used by the dead-end internal pressure filtration method. Filtration is performed until / m 2 is reached, and when the above virus-containing solution (5-B) is used, filtration is performed until the filtration volume reaches 5 L / m 2 to obtain a filtrate.
- the filtration pressure is selected according to the elastic limit pressure of the porous hollow fiber membrane, and for the porous hollow fiber whose elastic limit pressure is less than 200 kPa, 98 kPa is set as an appropriate pressure, and the elastic limit pressure exceeds 200 kPa. For quality hollow fibers, 196 kPa is used as an appropriate pressure.
- 3% BenchMark Fetal Bovine Serum (trademark, manufactured by Gemini Bio-Products) after heating and inactivating in a water bath at 56 ° C. for 30 minutes, 1% PENICILLIN STREPTOMYCIN SOL ( Trademark, Dulvecco's Modified Eagle Medium (1X), liquid + 4.5 g / L D-Glucose + L-Glutamine-SodeMine-Sodium Pyrate (manufactured by Life Technologies Corporation) (3% FBS / D-MEM) is prepared below, and each of the filtration source solution and the filtrate is separated and used in 3% FBS / D-MEM at 10 times, 10 2 times, 10 3 times, 10 4 times and 10 times. Dilute 5 times.
- PK-13 cells No. CRL-6489, purchased from ATCC
- 3% FBS / D-MEM 3% FBS / D-MEM
- a cell concentration of 2.0 ⁇ 105 cells / mL
- cell culture is carried out for 10 days in an atmosphere of 37 ° C. and 5% carbon dioxide.
- TCID 50 50% tissue culture infection value
- the filtration rate of the virus-containing protein solution by the 0.001 m 2 membrane module measures the time required to reach the filtration volume of 150 L / m 2 , and the membrane area is 1 m 2 , and the filtration rate per hour (L / (m 2 ). ⁇ Calculate as hr)).
- Measurement method of colloidal gold LRV of 0.001m 2 -film module AGP-HA20 (trademark, manufactured by Asahi Kasei Medical Co., Ltd.) containing gold colloid having a particle size of about 20 nm is used as distilled water for injection (manufactured by Otsuka Pharmaceutical Co., Ltd.). Dilute with 0.27 mass% SDS (sodium lauryl sulfate) solution and adjust so that the absorbance at a wavelength of 526 nm measured with an ultraviolet / visible spectrophotometer (manufactured by Shimadzu Corporation, model UV-2450) is 1.00. Colloidal gold solution Prepare the source solution for filtration.
- SDS sodium lauryl sulfate
- a 0.001 m 2 membrane module was prepared, and using the prepared colloidal gold solution, filtration was performed under the conditions of internal pressure filtration, a dead end method at a temperature of 25 ° C., an intermembrane differential pressure of 25 kPa, and a filtration volume of 2 L / m 2 .
- a filtrate of 0.5 L / m 2 to 2.0 L / m 2 is sampled.
- LRV log 10 (A / B) to measure the gold colloid.
- the logarithmic removal rate (LRV) of the particles is calculated.
- A represents the absorbance of the original filtration solution
- B represents the absorbance of the filtrate.
- Example 1 Cotton linter (average molecular weight 1.44 ⁇ 105) was dissolved in a copper ammonia solution prepared by a known method, filtered and defoamed, and cellulose was 7.5% by mass, ammonia was 4.4% by mass, and copper was 2. A spinning stock solution containing 7% by mass was prepared. An aqueous solution containing 38% by mass of acetone and 0.65% by mass of ammonia was prepared as the internal coagulation liquid, and an aqueous solution containing 28% by mass of acetone was prepared as the external coagulation liquid.
- a U-shaped funnel with a diameter of 7 mm is discharged at 3.78 mL / min and 0.69 mL / min, respectively, for the undiluted spinning solution (central spinning port) and internal coagulating solution (outer spinning port) prepared using the annular double spun.
- a hollow fiber membrane was formed by introducing the hollow fiber membrane into an external coagulating liquid flowing in a thin tube at 140 mL / min, and the underwater winding was performed at a winding speed (spinning speed) of 10 m / min.
- the wound hollow fiber was regenerated from cellulose in the hollow fiber membrane in a 3 mass% sulfuric acid aqueous solution, and further washed with water.
- the water content of the obtained hollow fiber membrane bundle was replaced with ethanol, and then the bundle was vacuum-dried under the conditions of 40 ° C. and 3 kPa in a state where both ends of the bundle were fixed and stretched by 3.5% to obtain the porous hollow fiber of Example 1.
- a thread membrane was obtained.
- Table 1 shows the results of measuring the elastic limit pressure, inner diameter (R), film thickness (t), water permeability, and bubble point of the obtained porous hollow fiber membrane according to Example 1 by the above-mentioned various measuring methods. show. Further, a graph created for deriving the elastic limit pressure is shown in FIG.
- a small membrane module similar to FIG. 1 of JP-A-2013-17990 was prepared by a known technique with a membrane area of 0.001 m 2 .
- Table 1 shows the results of measuring the virus LRV (using the virus-containing protein solution described in (5-A) above), the water permeability, and the gold colloid LRV using a 001 m 2 -membrane module.
- the inventors chose gold colloid removal performance evaluation as an alternative method for virus removal performance evaluation because the virus evaluation method has a measurement limit according to the virus concentration in the solution, and the virus solution is infected. This is because it is preferable to evaluate the removability of the gold colloidal particles in order to determine a subtle difference in the film structure because it contains a large amount of non-sexual particles and the like.
- Example 1 the conditions for producing the porous hollow yarn film are the undiluted spinning solution discharge amount, the internal coagulation liquid acetone concentration, the internal coagulation liquid ammonia concentration, the internal coagulation liquid discharge amount, the external coagulation liquid acetone concentration, and the external coagulation liquid.
- the ammonia concentration and the external coagulating liquid flow rate were changed to the conditions shown in Table 1, porous hollow yarn films according to Examples 2 to 4 and Comparative Examples 1 and 2, respectively, were produced.
- the results of measuring the elastic limit pressure, inner diameter (R), film thickness (t), water permeability, and bubble point of the obtained porous hollow fiber membranes of Examples 2 to 4 and Comparative Examples 1 and 2 are obtained.
- a 0.001 m 2 membrane module was prepared in the same manner as in Example 1 and subjected to virus LRV (using the virus-containing protein solution described in (5-A) above), water permeability evaluation, and gold colloid particle removal evaluation.
- the results are shown in Table 1.
- the filtration rate of the virus-containing protein solution by the porous hollow fiber membrane according to Example 2 was 145 LMH.
- the filtration rate of the virus-containing protein solution by the porous hollow fiber membrane according to Comparative Example 1 was 73 LMH.
- FIGS. 4 to 6 The photographs of the sliced sections of the porous hollow fiber membranes of Examples 2 to 4 observed by the same method as in Example 1 are shown in FIGS. 4 to 6, respectively.
- the porous hollow fiber membranes according to Examples 1 to 4 show an elastic limit pressure of 200 kPa or more, and the ratio (R / t) of the inner diameter (R) to the film thickness (t) is 8.4 or less.
- the parvovirus LRV (using the virus-containing protein solution described in (5-A) above) in the 196 kPa filtration was able to achieve a high value of 4.5 or more.
- the ratio showing the change in colloidal gold LRV before and after the pressurization load tends to decrease below 1, as the elastic limit pressure of the porous hollow fiber membrane decreases, that is, gold after the pressurization load. It was confirmed that the colloidal LRV tended to decrease. From the comparison between Example 3 and Example 4, it was shown that the set pressure of the integrity test is more preferably about 80% or less of the elastic limit pressure of the porous hollow fiber membrane.
- the porous hollow fiber membranes according to Comparative Examples 1 and 2 have an elastic limit pressure of less than 200 kPa and a ratio (R / t) of the inner diameter (R) to the film thickness (t) of 8.4. Over.
- the porous hollow fiber membranes according to Comparative Examples 1 and 2 have a preferable water permeability and a parvovirus LRV (using the virus-containing protein solution described in (5-A) above), but in a 0.001 m 2 membrane module.
- the quality change before and after the load due to the 250 kPa and 10-minute pressurization performed was a problematic change in actual use.
- Comparative Example 1 Although the change in the amount of water permeation was + 11%, which was within the permissible range, the gold colloid LRV showed rather higher performance after the pressurization load.
- the cause is not bound by theory, but it is presumed that the pores are closed due to local plastic deformation caused by pressurization.
- the fact that the virus removing ability of the porous hollow fiber membrane is evaluated higher than it should be due to pressurization during the integrity test may cause a problem that a failure in the integrity test is erroneously judged as a pass. ..
- Example 5 From the outside of the porous hollow fiber membrane according to Example 2, an excimer laser machine (manufactured by Sumitomo Heavy Industries, Ltd., model INDEX-800, wavelength 243 nm, rated output 80 W, repetition frequency 100 Hz, pulse energy 400 mJ) was used to spot the spot. Irradiation was performed under the conditions of a diameter of 12 ⁇ m, a fluence of 2.1 J / cm 2 , and the number of shots was 150, and a pinhole having a diameter of about 3 ⁇ m was machined on the surface of the porous hollow fiber.
- an excimer laser machine manufactured by Sumitomo Heavy Industries, Ltd., model INDEX-800, wavelength 243 nm, rated output 80 W, repetition frequency 100 Hz, pulse energy 400 mJ
- Example 5 When producing the 0.001 m 2 -membrane module according to Example 2, about 12 to 13 porous hollow fiber membranes were used. In Example 5, the method according to Example 5 was 0. A 001m 2 -membrane module was created.
- the integrity test by visual leak inspection of the 0.001 m 2 membrane module according to Example 1 is subject to the condition that no open bubbles are generated under the pressure condition of 216 kPa for 60 seconds. It was confirmed that
- Example 6 Using the porous hollow fiber membrane of Example 2, a membrane module having a membrane area of 0.1 m 2 similar to that shown in FIG. 4 of JP-A-2010-259992 was prepared by a known technique.
- Planova leak tester TM so that the space on the inner surface side of the porous hollow fiber membrane can be pressurized while the space on the outer surface side of the porous hollow fiber membrane of the 0.1 m 2 membrane module according to Example 6 is filled with water. It was connected to Asahi Kasei Medical Co., Ltd., model PLT-AM10). A leak test of 9 membrane module samples was performed with a pressure setting of 196 kPa and a measurement time of 30 seconds, and the average value of the pressure fluctuation values as the measurement results was 43.6 Pa, and the deviation was 8.7 Pa. Got
- the Planova leak tester (trademark, manufactured by Asahi Kasei Medical Co., Ltd., model PLT-AM10) measures the pressure increase in the outer surface side space of the porous hollow fiber membrane when the inner surface side space of the porous hollow fiber membrane is held at a constant pressure. It is a device to do.
- a hollow fiber having pinholes having diameters of 3, 6, 9, 12, 15, 18, and 21 ⁇ m formed on the porous hollow fiber membrane according to Example 2 by the same excimer laser processing method as in Example 5 was prepared.
- a 0.1 m 2 membrane module containing one porous hollow fiber membrane of various pinhole sizes was prepared.
- the pinhole diameter for achieving parvovirus LRV4 or higher was evaluated to be 12.5 ⁇ m or less.
- a 0.1 m 2 membrane module containing a pinhole-sized porous hollow fiber membrane with a diameter of approximately 12 ⁇ m was used in the same manner as described above using a Planova leak tester (trademark, manufactured by Asahi Kasei Medical Co., Ltd., model PLT-AM10).
- the pressure fluctuation value was 3450 Pa.
- This value was sufficiently higher than the average value of 43.6 Pa of the pressure fluctuation value of the normal 0.1 m 2 membrane module not including the pinhole hollow fiber. Therefore, it was shown that by setting an appropriate threshold value for the pressure fluctuation value, it is possible to determine whether or not the 0.1 m 2 membrane module has the performance of parvovirus LRV4 or less by using the leak tester in the integrity test. rice field.
- Example 7 Palltronic Flowstar (trademark, Pall) can pressurize the inner surface side space of the porous hollow fiber membrane in a state where the outer surface side space of the porous hollow fiber membrane of the 0.1 m 2 film module according to Example 6 is filled with water. It was connected to Type-IV manufactured by the company, display measurement value, two digits after the decimal point, measurement range of 0.1 to 1000 mL / min). A leak test of 9 membrane module samples was performed with a pressure setting of 196 kPa and a measurement time of 15 minutes. The average value of the air flow rate fluctuation values as the measurement results was 0.105 mL / min, and the deviation was 0.030 mL / min. I got the result that it is.
- Palltronic Flowstar (trademark, manufactured by Pall, Type-IV) is equipped with a mechanism to supply air to compensate for the pressure reduced by diffusion into the membrane when the inner surface side space of the porous hollow fiber membrane is held at a constant pressure. It is a device that measures the supplied air flow rate with a flow meter.
- a leak test was performed on a 0.1 m 2 membrane module containing one pinhole-sized porous hollow fiber membrane having a diameter of about 12 ⁇ m prepared in Example 6 by the same method as described above, and the measurement results were obtained.
- a certain air flow rate fluctuation value was 4.35 mL / min. This value was sufficiently high with respect to the average value of 0.105 mL / min of the air flow rate fluctuation value of the normal 0.1 m 2 membrane module not including the pinhole hollow fiber. Therefore, by setting an appropriate threshold for the air flow rate fluctuation value in consideration of the average value and deviation, whether the 0.1 m2 membrane module has the performance of parvovirus LRV4 or less by using the device for the completeness test. It was shown that it can be determined whether or not it is possible.
- Sartocheck (trademark, manufactured by Sartorius, Type-4Plus) measures the pressure reduced by diffusion into the membrane when the inner surface side space of the porous hollow yarn membrane is held at a constant pressure, and measures the volume of the inner surface side space. It is a device that converts the reduced pressure into a diffusion flow rate from the information and obtains it.
- a leak test was performed on a 0.1 m 2 membrane module containing one pinhole-sized porous hollow fiber membrane having a diameter of about 12 ⁇ m prepared in Example 6 by the same method as described above, and the measurement results were obtained.
- a certain air flow rate fluctuation value was 4.5 mL / min. This value was sufficiently high with respect to the average value of 0.24 mL / min of the air flow rate fluctuation value of the normal 0.1 m 2 membrane module not including the pinhole hollow fiber. Therefore, by setting an appropriate threshold for the air flow rate fluctuation value in consideration of the average value and deviation, whether or not the 0.1 m2 membrane module has the performance of parvovirus LRV4 or less by using the device for the completeness test. It was shown that it can be determined.
- Example 9 For the measurement of parvovirus LRV (using the virus-containing protein solution described in (5-A) above) using the 0.001 m 2 membrane module according to Example 2, obtain a filtrate after completion of 150 L / m 2 filtration.
- the parvovirus LRV was measured by the same method except that the pressure was released for 3 hours after the completion of the 150 L / m 2 filtration, and then the pressure was further increased to obtain a filtrate obtained by filtering at 15 L / m 2 .
- the evaluation results of the six evaluation modules were all determined to be 5.3 or higher parvovirus LRV.
- Example 10 Regarding the measurement of the parvovirus LRV of Example 9 (using the virus-containing protein solution described in (5-A) above), the evaluation modules of the six evaluation modules were measured in the same manner except that the filtration pressure was changed to 196 kPa to 150 kPa. Measurements were made. As a result, it was determined that all of them were 5.3 or more parvovirus LRV.
- Example 11 Regarding the measurement of the parvovirus LRV of Example 9 (using the virus-containing protein solution described in (5-A) above), the evaluation modules of the six evaluation modules were measured in the same manner except that the filtration pressure was changed to 196 kPa to 98 kPa. Measurements were made. As a result, it was determined that 5 of the 6 parvoviruses had a parvovirus LRV of 5.3 or more, but one parvovirus LRV was determined to be 4.1.
- the present invention is suitable as a porous hollow fiber membrane containing regenerated cellulose, and enables a completeness test method in which a leak test method is independently performed on the porous hollow fiber membrane.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Fluid Mechanics (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
[1]再生セルロースを含む多孔質中空糸膜であって、弾性限界圧力が200kPa以上である多孔質中空糸膜。
膜モジュールが、多孔質中空糸膜の外表面に接する外表面側空間と、多孔質中空糸膜の内表面に接する内表面側空間と、を有しており、
外表面側空間に液体を充填することと、
多孔質中空糸膜の膜間差圧が98kPaより大であり、かつ多孔質中空糸膜の弾性限界圧力以下の範囲の圧力となるよう、内表面側空間を空気で加圧することと、
を含む完全性試験方法。
膜モジュールが、多孔質中空糸膜の外表面に接する外表面側空間と、多孔質中空糸膜の内表面に接する内表面側空間と、を有しており、
多孔質中空糸膜の膜間差圧が98kPa以上であり、かつ多孔質中空糸膜の弾性限界圧力以下の範囲の圧力となるよう、内表面側空間を加圧すること、
を含む完全性試験方法。
Q=30πR2(P1+0.1) (1)
(式中、Q:流量(mL/分)、R:温度20℃におけるピンホール直径(μm)、P1:試験圧力(MPa))
(1)外表面側空間に液体を充填する工程、及び
(2)多孔質中空糸膜の膜間差圧が98kPaより大であり、かつ多孔質中空糸膜の弾性限界圧力以下の範囲となるように、内表面側空間を空気で加圧する工程を含む。
長さ50mmの多孔質中空膜1本の一方の端部をウレタン樹脂等の硬化性液状樹脂により空気が漏れ出ないように封止し、他方の端をマイクロカプラ(日東工器社製、MC-04PH)に挿入した状態でウレタン樹脂等の硬化性液状樹脂により中空部を埋めないように接着固定した測定用モジュールを準備する。別に圧縮空気供給用の配管に圧力調整弁、圧力計、測定用モジュールのマイクロカプラを接続可能とするようマイクロカプラ(日東工器社製、MC-10SM)を備えた加圧装置を準備する。測定用モジュールを水に浸漬した状態で加圧装置に接続し、20kPa間隔で圧力を増大させて中空部に圧縮空気を供給したときの、中空糸の外径を寸法測定器(キーエンス社製、型式LS-9006M)で測定する。次式により各測定圧力による外径変化率(%)を計算し、X軸を測定圧力(kPa)、Y軸を外径変化率(%)とするグラフを作成する。
外径変化率(%)=(D/D0-1)×100
(式中、D:各圧力における外径(μm)、D0:無加圧状態での外径初期値(μm))
多孔質中空糸膜の断面切片を作成して、マイクロスコープ(キーエンス社製、型式VHX-5000)を用いて200倍で撮影した画像を準備し、画像上の中空糸断面の膜厚を全周にわたって少なくとも20ヶ所を測定し、平均した値を膜厚の測定値とする。
多孔質中空糸膜10本を束ね、一方の端部に透水測定機に接続可能なポリエチレン性チューブを接着剤で取り付け、中空糸他方の端部を16cmの有効長さになるように調整して封止した測定用モジュールを準備する。
多孔質中空糸膜の一端を封止して、他端を空気、あるいは窒素により加圧することが可能となるよう金属カプラにウレタン樹脂により固定した試験モジュール(有効長8cm)を作成する。試験モジュールにチューブを装着して、チューブ内に3M Novec 7200高機能性液体(商標、スリーエムジャパン株式会社製)を注入して多孔質中空糸膜を液体に浸漬させる。
公知の技術を用いて特開2013-17990号公報の図1に記載の小型膜モジュールを0.001m2の膜面積で作成する。
0.001m2膜モジュールを準備し、内圧濾過、デッドエンド方式により温度25℃、膜間差圧98kPa、10分間、限外濾過膜を通した純水を濾過し、濾液を計量して、膜面積1m2、1時間当たりの透水量(L/(m2・hr))として算定する。
粒子径が約20nmの金コロイドを含む溶液AGP-HA20(商標、旭化成メディカル社製)を注射用蒸留水(大塚製薬社製)、0.27質量%SDS(ラウリル硫酸ナトリウム)水溶液で希釈し、紫外・可視分光光度計(島津製作所製、型式UV-2450)にて測定した波長526nmにおける吸光度が1.00になるよう調整して金コロイド溶液濾過元液を準備する。
コットンリンター(平均分子量1.44×105)を公知の方法で調製した銅アンモニア溶液中に溶解せしめ、濾過脱泡を行ない、セルロース7.5質量%、アンモニア4.4質量%、銅2.7質量%を含む紡糸原液を作成した。内部凝固液としてアセトン38質量%、アンモニア0.65質量%を含む水溶液と、外部凝固液としてアセトン28質量%を含む水溶液を準備した。
実施例1に対して、多孔質中空糸膜の製造条件である、紡糸原液吐出量、内部凝固液アセトン濃度、内部凝固液アンモニア濃度、内部凝固液吐出量、外部凝固液アセトン濃度、外部凝固液アンモニア濃度、及び外部凝固液流量を表1に示す条件に変更して、実施例2から4、並びに比較例1及び2に係る多孔質中空糸膜をそれぞれ製造した。
実施例2に係る多孔質中空糸膜の外側からエキシマレーザー加工機(住友重機械工業社製、型式INDEX-800、波長243nm、定格出力80W、繰返し周波数100Hz、パルスエネルギー400mJ)を用いて、スポット径12μm、フルエンス2.1J/cm2、ショット数150回の条件で照射し、多孔質中空糸表面に直径凡そ3μmのピンホールを加工した。
実施例5に係る0.001m2膜モジュールの多孔質中空糸膜の外表面側空間に水を充填し、多孔質中空糸膜の内表面側空間を98kPaで加圧したところ、60秒を超えても気泡の発生は確認できなかった。
実施例2の多孔質中空糸膜を用いて、公知技術により特開2010-259992号公報の図4と類似の膜面積0.1m2の膜モジュールを作成した。
実施例6に係る0.1m2膜モジュールの多孔質中空糸膜の外表面側空間に水を充填した状態で多孔質中空糸膜の内表面側空間を加圧できるようPalltronic Flowstar(商標、Pall社製、Type-IV、表示測定値小数点以下二桁、測定範囲0.1~1000mL/分)に接続した。圧力設定196kPa、測定時間15分で9つの膜モジュールのサンプルのリークテストを実施して、測定結果である空気流量変動値の平均値は0.105mL/分であり、偏差は0.030mL/分であるとの結果を得た。
実施例6に係る0.1m2膜モジュールの多孔質中空糸膜の外表面側空間に水を充填した状態で多孔質中空糸膜の内表面側空間を加圧できるようSartocheck(商標、Sartorius社製、Type-4Plus、表示測定値小数点以下一桁、測定範囲0.1~3000mL/分)に接続した。圧力設定196kPa、測定時間15分で9つの膜モジュールのサンプルのリークテストを実施して、測定結果である空気流量変動値の平均値は0.24mL/分であり、偏差は0.05mL/分であるとの結果を得た。
実施例7及び実施例8で行った、実施例6に係る0.1m2膜モジュールの9つのサンプルを用いた空気流量変動値測定について、圧力設定を196kPaから98kPaと変えた以外は同様の方法で空気流量変動値の測定を行った。その結果、実施例7の装置では空気流量変動値は0.10mL/分に満たない値を示し、実施例8の装置では空気流量変動値は0.0mL/分あるいは0.1mL/分の値を示した。それぞれの装置の測定下限値である0.1mL/分に満たない測定結果からは、正常な膜モジュールの測定が正しく実施できていることを確認できず、またピンホールが形成された中空糸を含む0.1m2膜モジュールとの測定値との間で適当は閾値を設けることができないため、両装置を98kPaの条件で使用することは不適切であることが示された。
実施例2に係る0.001m2膜モジュールを用いたパルボウイルスLRV(上記(5-A)に記載のウイルス含有タンパク質溶液を使用)の測定について、150L/m2濾過終了後の濾液を得ることを、150L/m2濾過終了後に3時間の圧力解放を行いその後更に昇圧して15L/m2の濾過を行った濾液を得ることに変える以外は同様の方法によりパルボウイルスLRVを測定した。評価モジュール6本の評価結果は何れも5.3以上のパルボウイルスLRVと判定された。
実施例9のパルボウイルスLRV(上記(5-A)に記載のウイルス含有タンパク質溶液を使用)の測定について、濾過圧力を196kPaに変えて150kPaとすること以外は同様の方法で評価モジュール6本の測定を行った。その結果、何れも5.3以上のパルボウイルスLRVと判定された。
Claims (14)
- 再生セルロースを含む多孔質中空糸膜であって、弾性限界圧力が200kPa以上である多孔質中空糸膜。
- 当該多孔質中空糸膜の膜厚(t)に対する内径(R)の比(R/t)が8.4以下である、請求項1に記載の多孔質中空糸膜。
- 当該多孔質中空糸膜の膜厚(t)が20μm以上70μm以下の範囲である、請求項1又は2に記載の多孔質中空糸膜。
- 前記再生セルロースが銅アンモニア法による再生セルロースである、請求項1から3のいずれか1項に記載の多孔質中空糸膜。
- 当該多孔質中空糸膜の内表面における孔径が外表面における孔径より大きい、請求項1から4のいずれか1項に記載の多孔質中空糸膜。
- 当該多孔質中空糸膜の内表面側から外表面側に向かって孔径が小さくなる傾斜構造を有する、請求項1から5のいずれか1項に記載の多孔質中空糸膜。
- 濾過圧力27kPa、37℃における透水量が10L/(m2・hr)以上50L/(m2・hr)以下である、請求項1から6のいずれか1項に記載の多孔質中空糸膜。
- バブルポイントが1.2MPa以上である、請求項1から7のいずれか1項に記載の多孔質中空糸膜。
- ウイルス除去に使用される、請求項1から8のいずれか1項に記載の多孔質中空糸膜。
- パルボウイルス除去率(LRV)が4.0以上である、請求項9に記載の多孔質中空糸膜。
- 請求項1から10のいずれか1項に記載の多孔質中空糸膜を用いた生物学的製剤含有液の濾過方法であって、濾過時の前記多孔質中空糸膜の膜間差圧が150kPa以上である濾過方法。
- 請求項1から10のいずれか1項に記載の多孔質中空糸膜が充填された膜モジュールの完全試験方法であって、
前記膜モジュールが前記多孔質中空糸膜の外表面に接する外表面側空間と、前記多孔質中空糸膜の内表面に接する内表面側空間と、を有しており、
前記外表面側空間に液体を充填することと、
前記多孔質中空糸膜の膜間差圧が98kPaより大であり、かつ前記多孔質中空糸膜の弾性限界圧力以下の範囲の圧力となるよう、前記内表面側空間を空気で加圧することと、
を含む完全性試験方法。 - 前記多孔質中空糸膜から生じる気泡を目視観察する工程を含む、請求項12に記載の完全性試験方法。
- 前記外表面側空間及び前記内表面側空間のうち、いずれか一方の空間の圧力変動値を測定する工程、又はいずれか一方の空間の圧力を一定に保持するために必要な空気流入量を測定する工程を含む、請求項12に記載の完全性試験方法。
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202180080642.5A CN116528968A (zh) | 2020-12-04 | 2021-12-03 | 多孔中空纤维膜及完整性试验方法 |
KR1020237017034A KR20230090351A (ko) | 2020-12-04 | 2021-12-03 | 다공질 중공사막 및 완전성 시험 방법 |
CA3196731A CA3196731A1 (en) | 2020-12-04 | 2021-12-03 | Porous hollow-fiber membrane and method for testing integrity |
EP21900692.1A EP4257229A1 (en) | 2020-12-04 | 2021-12-03 | Porous hollow-fiber membrane and method for testing integrity |
AU2021392478A AU2021392478A1 (en) | 2020-12-04 | 2021-12-03 | Porous hollow-fiber membrane and method for testing integrity |
JP2022566994A JPWO2022118943A1 (ja) | 2020-12-04 | 2021-12-03 | |
US18/035,142 US20240001309A1 (en) | 2020-12-04 | 2021-12-03 | Porous hollow-fiber membrane and method for testing integrity |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-202097 | 2020-12-04 | ||
JP2020202097 | 2020-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022118943A1 true WO2022118943A1 (ja) | 2022-06-09 |
Family
ID=81853393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/044385 WO2022118943A1 (ja) | 2020-12-04 | 2021-12-03 | 多孔質中空糸膜及び完全性試験方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20240001309A1 (ja) |
EP (1) | EP4257229A1 (ja) |
JP (1) | JPWO2022118943A1 (ja) |
KR (1) | KR20230090351A (ja) |
CN (1) | CN116528968A (ja) |
AU (1) | AU2021392478A1 (ja) |
CA (1) | CA3196731A1 (ja) |
WO (1) | WO2022118943A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115336665A (zh) * | 2022-10-18 | 2022-11-15 | 黑龙江飞鹤乳业有限公司 | 乳铁蛋白处理方法、装置以及有效性验证方法 |
WO2024058110A1 (ja) * | 2022-09-12 | 2024-03-21 | 旭化成メディカル株式会社 | 抗体の精製方法 |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63102676A (ja) * | 1986-10-20 | 1988-05-07 | Asahi Chem Ind Co Ltd | ウイルスの濃縮法 |
JPH01254205A (ja) * | 1988-04-01 | 1989-10-11 | Asahi Chem Ind Co Ltd | ウイルス除去ユニツト |
JPH01254204A (ja) * | 1988-04-01 | 1989-10-11 | Asahi Chem Ind Co Ltd | ウイルス除去方法 |
JPH0429727A (ja) * | 1990-05-28 | 1992-01-31 | Asahi Chem Ind Co Ltd | リポ蛋白除去用高分子多孔膜 |
JPH07132215A (ja) | 1993-11-10 | 1995-05-23 | Asahi Chem Ind Co Ltd | ウイルス除去膜のインテグリティテスト方法 |
WO2005084785A1 (ja) * | 2004-03-03 | 2005-09-15 | Asahi Kasei Pharma Corporation | 多孔性膜の気体透過方法 |
WO2007102427A1 (ja) * | 2006-03-02 | 2007-09-13 | Sei-Ichi Manabe | 孔拡散式平膜分離装置・平膜濃縮装置・孔拡散用再生セルロース多孔膜および非破壊式の平膜検査方法 |
WO2008156124A1 (ja) * | 2007-06-19 | 2008-12-24 | Asahi Kasei Kabushiki Kaisha | 免疫グロブリン1量体の分離方法 |
JP2010259992A (ja) | 2009-05-01 | 2010-11-18 | Asahi Kasei Medical Co Ltd | 中空糸モジュールの密閉機構及び中空糸モジュール |
JP2013017990A (ja) | 2012-02-29 | 2013-01-31 | Asahi Kasei Medical Co Ltd | 小型膜モジュール |
WO2015156403A1 (ja) * | 2014-04-11 | 2015-10-15 | 旭化成メディカル株式会社 | ウイルス除去膜 |
WO2015156401A1 (ja) | 2014-04-11 | 2015-10-15 | 旭化成メディカル株式会社 | ウイルス除去膜 |
WO2017170874A1 (ja) | 2016-03-31 | 2017-10-05 | 旭化成メディカル株式会社 | ウイルス除去膜及びウイルス除去膜の製造方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5979279B2 (ja) | 2015-06-01 | 2016-08-24 | 第一精工株式会社 | プレスフィット用コネクタ端子およびその製造方法 |
CN107199699B (zh) | 2016-03-18 | 2020-02-04 | 三纬国际立体列印科技股份有限公司 | 彩色三维模型的切层打印方法 |
-
2021
- 2021-12-03 CA CA3196731A patent/CA3196731A1/en active Pending
- 2021-12-03 WO PCT/JP2021/044385 patent/WO2022118943A1/ja active Application Filing
- 2021-12-03 JP JP2022566994A patent/JPWO2022118943A1/ja active Pending
- 2021-12-03 KR KR1020237017034A patent/KR20230090351A/ko unknown
- 2021-12-03 US US18/035,142 patent/US20240001309A1/en active Pending
- 2021-12-03 EP EP21900692.1A patent/EP4257229A1/en active Pending
- 2021-12-03 CN CN202180080642.5A patent/CN116528968A/zh active Pending
- 2021-12-03 AU AU2021392478A patent/AU2021392478A1/en active Pending
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63102676A (ja) * | 1986-10-20 | 1988-05-07 | Asahi Chem Ind Co Ltd | ウイルスの濃縮法 |
JPH01254205A (ja) * | 1988-04-01 | 1989-10-11 | Asahi Chem Ind Co Ltd | ウイルス除去ユニツト |
JPH01254204A (ja) * | 1988-04-01 | 1989-10-11 | Asahi Chem Ind Co Ltd | ウイルス除去方法 |
JPH0429727A (ja) * | 1990-05-28 | 1992-01-31 | Asahi Chem Ind Co Ltd | リポ蛋白除去用高分子多孔膜 |
JPH07132215A (ja) | 1993-11-10 | 1995-05-23 | Asahi Chem Ind Co Ltd | ウイルス除去膜のインテグリティテスト方法 |
WO2005084785A1 (ja) * | 2004-03-03 | 2005-09-15 | Asahi Kasei Pharma Corporation | 多孔性膜の気体透過方法 |
WO2007102427A1 (ja) * | 2006-03-02 | 2007-09-13 | Sei-Ichi Manabe | 孔拡散式平膜分離装置・平膜濃縮装置・孔拡散用再生セルロース多孔膜および非破壊式の平膜検査方法 |
WO2008156124A1 (ja) * | 2007-06-19 | 2008-12-24 | Asahi Kasei Kabushiki Kaisha | 免疫グロブリン1量体の分離方法 |
JP2010259992A (ja) | 2009-05-01 | 2010-11-18 | Asahi Kasei Medical Co Ltd | 中空糸モジュールの密閉機構及び中空糸モジュール |
JP2013017990A (ja) | 2012-02-29 | 2013-01-31 | Asahi Kasei Medical Co Ltd | 小型膜モジュール |
WO2015156403A1 (ja) * | 2014-04-11 | 2015-10-15 | 旭化成メディカル株式会社 | ウイルス除去膜 |
WO2015156401A1 (ja) | 2014-04-11 | 2015-10-15 | 旭化成メディカル株式会社 | ウイルス除去膜 |
WO2017170874A1 (ja) | 2016-03-31 | 2017-10-05 | 旭化成メディカル株式会社 | ウイルス除去膜及びウイルス除去膜の製造方法 |
Non-Patent Citations (1)
Title |
---|
"Virus Experimental Studies, Introduction", JAPANESE NATIONAL INSTITUTE OF HEALTH STUDENT'S ASSOCIATION, pages: 173 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024058110A1 (ja) * | 2022-09-12 | 2024-03-21 | 旭化成メディカル株式会社 | 抗体の精製方法 |
CN115336665A (zh) * | 2022-10-18 | 2022-11-15 | 黑龙江飞鹤乳业有限公司 | 乳铁蛋白处理方法、装置以及有效性验证方法 |
Also Published As
Publication number | Publication date |
---|---|
EP4257229A1 (en) | 2023-10-11 |
JPWO2022118943A1 (ja) | 2022-06-09 |
KR20230090351A (ko) | 2023-06-21 |
CA3196731A1 (en) | 2022-06-09 |
US20240001309A1 (en) | 2024-01-04 |
CN116528968A (zh) | 2023-08-01 |
AU2021392478A1 (en) | 2023-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2022118943A1 (ja) | 多孔質中空糸膜及び完全性試験方法 | |
JP5754654B2 (ja) | タンパク質含有液処理用多孔質中空糸膜 | |
JP5403444B1 (ja) | 多孔質中空糸膜 | |
JP5207150B2 (ja) | 多孔質中空糸膜およびタンパク質含有液処理用多孔質中空糸膜 | |
JP6220447B2 (ja) | ウイルス除去膜 | |
JP4024041B2 (ja) | 生理活性物質溶液用濾過膜 | |
JP2022068142A (ja) | フィルター膜及びデバイス | |
JPWO2006016575A1 (ja) | 高透水性中空糸膜型血液浄化器及びその製造方法 | |
WO2013012024A1 (ja) | 多孔質中空糸膜 | |
JP6576546B2 (ja) | ウイルス除去膜及びウイルス除去膜の製造方法 | |
JPWO2019225730A1 (ja) | 多孔質中空糸膜 | |
JP5835659B2 (ja) | タンパク質含有液処理用多孔質中空糸膜 | |
Kuriyel et al. | Sterile filtration and virus filtration | |
RU2820999C1 (ru) | Пористая половолоконная мембрана и способ проверки целостности | |
JP2006006381A (ja) | 高透水性中空糸膜型血液浄化器 | |
WO2024058110A1 (ja) | 抗体の精製方法 | |
Fallahianbijan | Evaluating the Performance Characteristics of Virus Filtration Membranes | |
JP2005342093A (ja) | 高透水性中空糸膜型血液浄化器 | |
JP3153829B2 (ja) | 高分子膜モジュールのウィルス除去性能の新規な評価方法 | |
JPS5922558A (ja) | 体液分離用限外ろ過モジユ−ルのパイロジエン汚染防止法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21900692 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 3196731 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18035142 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20237017034 Country of ref document: KR Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 2022566994 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180080642.5 Country of ref document: CN |
|
ENP | Entry into the national phase |
Ref document number: 2021392478 Country of ref document: AU Date of ref document: 20211203 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021900692 Country of ref document: EP Effective date: 20230704 |