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1. 发明专利

JPH04166219A PRODUCTION OF MEMBRANE PROVIDED WITH HYDROPHILIC PROPERTY 失效
公开(公告)号：JPH04166219A
公开(公告)日：1992-06-12
申请号：JP29254190
申请日：1990-10-29
申请人： KURARAY CO
发明人： KOMATSU KENSAKU , OKAMOTO TAKEHIKO , KUSUDO OSAMU
IPC分类号： B01D69/02 , B01D71/64 , B01D71/68
摘要： PURPOSE:To easily produce the title membrane without restriction on stock or conditions in production by using a soln. contg. a specified wt.% of a hydrophilic polymer as a solidifying bath when a soln. consisting of a hydrophobic polymer, a solvent and a nonsolvent or a swelling agent is extruded from a nozzle into the solidifying bath to produce a membrane. CONSTITUTION:When a soln. consisting of a hydrophobic polymer, a solvent and a nonsolvent or a swelling agent is extruded from a nozzle into a solidifying bath to produce a membrane, a soln. contg. 0.1-20wt.% hydrophilic polymer is used as the solidifying bath. A hydrophilic membrane having physical properties fit for various uses can easily be produced only by adding the hydrophilic polymer without varying the stock soln. or considerably increasing the number of processes. This membrane can be used in various fields, e.g. in industrial and medical uses.

2. 发明专利

JPH04118034A POLYSULFONE-BASED HOLLOW YARN FILM AND ITS MANUFACTURE 失效
公开(公告)号：JPH04118034A
公开(公告)日：1992-04-20
申请号：JP23796890
申请日：1990-09-07
申请人： KURARAY CO
发明人： KUSUDO OSAMU , KOMATSU KENSAKU , OKAMOTO TAKEHIKO
IPC分类号： B01D71/68 , B01D69/08 , D01F6/76
摘要： PURPOSE:To obtain a film having stable hydrophilic property for a long term by using a polysulfone-based hollow yarn film containing a complex of polyvinyl pyrrolidone and polyvalent acid and having a fixed value or more of permeable velocity. CONSTITUTION:Spinning raw liquid composed of a polysulfone-based resin, polyvinyl pyrrolidone, polyalkylene glycol, polyvalent acid and common solvent is spinned from an annular nozzle. Then, the polysulfone-based hollow yarn film having 50-2000Angstrom average pore diameter of fine pores on one side face, 70-85% void ratio of fine porous film and containing >=0.5wt.% the complex of polyvinyl pyrrolidone and polyvalent acid to the polysulfone-based resin and having >=500l/hr.m .kg/cm the permeable velocity, it obtd. The film obtd. with such a way displays the stable hydrophilic property for a long term.

3. 发明专利

JPH0474584A TREATMENT OF WASTE WATER 失效
公开(公告)号：JPH0474584A
公开(公告)日：1992-03-09
申请号：JP18819290
申请日：1990-07-16
申请人： KURARAY CO
发明人： KUSUDO OSAMU , SUMINA SHOJI
IPC分类号： B01D65/02 , C02F1/44 , C02F3/12
摘要： PURPOSE:To stably treat the treated water of an aeration tank using an ultrafiltration hollow fiber membrane by a method wherein the treated water of the aeration tank is circulated and supplied to a membrane module having the ultrafiltration hollow fiber membrane built therein and the flow path supplying the treated water of the aeration tank is subsequently closed to backwash the hollow fiber membrane with a filtrate. CONSTITUTION:A membrane module 4 and an aeration tank 1 are connected by a circulation circuit 3 and a pump 2 for supplying the treated water of the aeration tank 1 to the membrane module 4 is provided to the circulation circuit 3. The treated water of the aeration tank 1 is sent to the membrane module so as to pass along the surface of the hollow fiber membrane received in said module at membrane surface speed of 1.5 - 3 m/s. In the backwashing with a filtrate, the filtrate in a filtrate tank 5 is supplied to the outside of the hollow fiber membrane under pressure by a pump or air pressure. As the pressure at the time of the backwashing with the filtrate becomes high, the SS component bonded to the inner surface of the membrane can be efficiently peeled off. The treated water of the aeration tank is circulated for a time (usually, about 10 sec) capable of entirely returning the peeled SS component to the aeration tank while the backwashing with the filtrate is carried out in order to prevent the re-adhesion of the peeled SS component to the surface of the membrane and, thereafter, the backwashing with the filtrate is stopped to start filtering.

4. 发明专利

JPH03258330A POROUS HOLLOW FIBER MEMBRANE 失效
公开(公告)号：JPH03258330A
公开(公告)日：1991-11-18
申请号：JP5934690
申请日：1990-03-09
申请人： KURARAY CO
发明人： KOMATSU KENSAKU , OKAMOTO TAKEHIKO , KUSUDO OSAMU
IPC分类号： B01D63/02 , B01D69/02 , B01D69/08 , B01D71/68 , D01D5/24 , D01F6/76
摘要： PURPOSE:To obtain a hydrophilic hollow fiber membrane having high water permeability, excellent fractionating property and small reduction of flux by forming such a porous structure comprising a dense layer of the inner surface and a reticular structure in a manner that the reticular structure partially has openings to give pores to the outer surface, and specifying the permeation rate for pure water to a certain value or larger. CONSTITUTION:The porous hollow fiber membrane contains 0.5-10% hydrophilic polymers (e.g. polyvinylpyrrolidone) to hydrophobic polymers (preferably, polysulfone or polyethersulfone). This membrane has a porous structure comprising 0.5-5mum-thick dense layer having fine pores of various shapes with 10-50% porosity and a reticular structure formed continuously to the dense layer. The outer surface of the membrane has pores with the maximum pore diameter of 0.5-5mum which are formed by partial opening of the reticular structure. The permeation rate for pure water of the membrane at 25 deg.C is specified to >=800l/m .hr.kg/cm . The obtd. porous hollow fiber membrane is excellent in water permeability and fractionating property, and moreover, it is hydrophilic.

5. 发明专利

JPS641110B2 失效
公开(公告)号：JPS641110B2
公开(公告)日：1989-01-10
申请号：JP12145979
申请日：1979-09-19
申请人： KURARAY CO
发明人： KUSUDO OSAMU , HAMAMOTO YOSHITO
IPC分类号： A23L27/50

6. 发明专利

JPS60231156A LIQUID JUNCTION TYPE REFERENCE ELECTRODE 失效
公开(公告)号：JPS60231156A
公开(公告)日：1985-11-16
申请号：JP8818584
申请日：1984-04-30
申请人： KURARAY CO
发明人： NAKAMURA MICHIHIRO , YANO MAKOTO , IKETANI HIDEHIKO , TSURUMI HIROSHI , KUSUDO OSAMU , HAMAMOTO YOSHITO
IPC分类号： G01N27/401 , G01N27/30 , G01N27/403
摘要： PURPOSE:To eliminate the disconnection of the liquid junction between an internal solution and an external solution to be inspected, by using a porous yarn, which comprises a hydrophilic polymer and of which the pore volume is a specific value or more, as the internal solution holder of a reference electrode. CONSTITUTION:A silver-silver chloride wire 7 is provided so as to be extended into a flexible fine tube 6, for example, a catheter and the leading end thereof is contacted with the porous yarn 8 received in the leading end of the tube 6. The silver-silver chloride wire and the porous yarn are fixed in the tube by a resin 9. The porous yarn 8 being the internal solution holder of a reference electrode comprises a hydrophilic polymer such as polyvinyl alcohol or an ethylene/ vinyl alcohol copolymer and requires a pore volume of 0.2cc/g or more. In thus constituted reference electrode, because the internal solution is held in the fine pores of the porous yarn and the silver-silver chloride wire is closely contacted with said solution and extended to a liquid junction port, there is no disconnection of the liquid junction between the silver-silver chloride electrode and a solution to be inspected.

7. 发明专利

JPS6012015B2 失效
公开(公告)号：JPS6012015B2
公开(公告)日：1985-03-29
申请号：JP10033680
申请日：1980-07-21
申请人： KURARAY CO
发明人： KUSUDO OSAMU , HAMAMOTO YOSHITO
IPC分类号： B01D29/11 , A23L27/50 , B01D35/02 , B01D63/02 , B30B9/02

8. 发明专利

JPS5820319B2 失效
公开(公告)号：JPS5820319B2
公开(公告)日：1983-04-22
申请号：JP14681778
申请日：1978-11-27
申请人： KURARAY CO
发明人： SUEOKA AKINORI , KUSUDO OSAMU , TANII HIROKUNI
IPC分类号： C02F1/64 , B01D61/14 , B01D61/16 , B01D61/46 , B01D65/06 , B01D71/38 , B01D71/78 , B01D71/80

9. 发明专利

JPS57206378A FILTERING METHOD OF SAKE 失效
公开(公告)号：JPS57206378A
公开(公告)日：1982-12-17
申请号：JP9133381
申请日：1981-06-12
申请人： KURARAY CO
发明人： KUSUDO OSAMU , HAMAMOTO YOSHITO , HORIO SHIYUNICHIROU
IPC分类号： C12G3/02
摘要： PURPOSE:To filter the SAKE by the improved fractionating and ger-free method and improve the clarity of the filtered SAKE, by using microporous hollow fibrous membranes. CONSTITUTION:A raw SAKE before the pasteurization or SAKE after the addition of a protenic flocculating agent and pasteurization is filtered through microporous hollow fibrous membranes having an average pore size of 0.01-1mu, preferably 0.02-0.2mu, e.g. polyvinyl alcohol hollow fibrous membranes, and the filtered SAKE is diluted with water if desired and then refiltered through microporous hollow fibrous membranes having an average pore diameter of 0.01-1mu.

10. 发明专利

JPS57113809A MEMBRANE FOR SEPARATION 失效
公开(公告)号：JPS57113809A
公开(公告)日：1982-07-15
申请号：JP18877980
申请日：1980-12-29
申请人： KURARAY CO
发明人： KUSUDO OSAMU , OKAMOTO TAKEHIKO , OOMORI AKIO , HAMAMOTO YOSHITO
IPC分类号： B01D71/30 , B01D71/38
摘要： PURPOSE:To obtain a membrane for separation having superior acid resistance and oxidation resistance by sticking polyvinyl chloride (PVC) on the inside and outside surfaces of the membrane with specific micropore sizes and the inside surfaces of the pores of the membrane. CONSTITUTION:In a membrane having fine structure with 0.01-1mu average pore sizes, PVC is stuck approximately uniformly on the inside and outside surfaces of the membrane, and the inside surfaces of the pores of the membrane. The concn. of this sticking is not required to be the same in all the places; for example, the concn. of the sticking higher on the inside and outside surfaces of the membrane than on the inside surfaces of the pores gives equally good results. The preferable concn. of the sticking is to the extent of not changing the average pore sizes of the membrane largely and of not degrading permeation performance, etc. and it is about 2.5-40wt% basing on the weight of the membrane backing material. The PVC is stuck by the method of immersing the membrane backing material in a soln. prepd, by dissolving PVC in a solvent to allow the soln to be impregnated thoroughly with said material and removing the liquid in a manner as to avoid drying the surfaces at ordinary temp. or below the boiling point of the solvent and further drying the same. The liquid removal is accomplished by leaving the membrane under gravity in a tightly sealed housing or exerting centrifugal force thereto. The film backing material is a backing material having low acid resistance and oxidation resistance such as polyvinyl alcohol (PVA) polymer or the like.

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