专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

61. 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.

62. 发明专利

JPH0417694B2 失效
公开(公告)号：JPH0417694B2
公开(公告)日：1992-03-26
申请号：JP10049988
申请日：1988-04-22
申请人： KURARAY CO
发明人： OKANO YOSHIHIRO , OKAMOTO TAKEHIKO , OOMORI AKIO
IPC分类号： B01D63/02

63. 发明专利

JPH0445831A MEMBRANE WITH HIGHER HYDROPHILIC NATURE 失效
公开(公告)号：JPH0445831A
公开(公告)日：1992-02-14
申请号：JP15116290
申请日：1990-06-08
申请人： KURARAY CO
发明人： NAKAHARA SEIICHI , OKAMOTO TAKEHIKO
IPC分类号： B01D71/08 , B01D69/02 , B01D71/34 , B01D71/82
摘要： PURPOSE:To obtain such a separation membrane which can easily be made hydrophilic and does not change its performance by incorporating at least one kind of alginic acid and alginic acid salt in the production process of the separation membrane from hydrophobic polymers by dry-wet or wet method. CONSTITUTION:In the production process of a separation membrane from hydrophobic polymers such as polysulfone, polyether sulfone, polyaryl sulfone, polyvinylidene fluoride, polyamide imide, etc., by dry-wet or wet method, at least one kind of alginic acid and the salt of its derv. (partially methylesterified alginic acid, carbomethoxy alginic acid, etc.,) into the polymers above mentioned. The add amt. of alginic acid salt into the source liquid for spinning depends on the kind and concn. of hydrophobic polymers, fine-pore forming agent, swelling agent, and solvent, and the higher the concn. of these, the add amt. becomes the smaller. Thereby, a separation membrane comprising hydrophobic polymers can easily be made hydrophilic, and the obtd. membrane is excellent, showing no change in its performance after repeatedly dried.

64. 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.

65. 发明专利

JPH0347127B2 失效
公开(公告)号：JPH0347127B2
公开(公告)日：1991-07-18
申请号：JP3166381
申请日：1981-03-04
申请人： KURARAY CO
发明人： OOMORI AKIO , OKAMOTO TAKEHIKO , HAMAMOTO YOSHITO
IPC分类号： C02F1/44 , B01D69/08 , B01D71/68

66. 发明专利

JPH0335971B2 失效
公开(公告)号：JPH0335971B2
公开(公告)日：1991-05-30
申请号：JP3330483
申请日：1983-02-28
申请人： KURARAY CO
发明人： OOYABU SHUZO , KAWAI SHUJI , OKAMOTO TAKEHIKO , MIGAKI TAKAO
IPC分类号： D01F8/04 , B01D69/02 , B01D69/08 , B01D69/12 , B01D71/68 , B01D71/70 , D06M15/643 , D06M101/00 , D06M101/16 , D06M101/30

67. 发明专利

JPH0139801B2 失效
公开(公告)号：JPH0139801B2
公开(公告)日：1989-08-23
申请号：JP3330283
申请日：1983-02-28
申请人： KURARAY CO
发明人： OKANO YOSHIHIRO , OKAMOTO TAKEHIKO , OOMORI AKIO
IPC分类号： B01D29/11 , B01D63/02

68. 发明专利

JPH0122007B2 失效
公开(公告)号：JPH0122007B2
公开(公告)日：1989-04-25
申请号：JP13728281
申请日：1981-08-31
申请人： KURARAY CO
发明人： OOYABU SHUZO , KAWAI SHUJI , OKAMOTO TAKEHIKO , MIGAKI TAKAO
IPC分类号： C08J9/26 , B01D53/22 , B01D69/10 , B01D69/14 , D06M11/00 , D06M13/144 , D06M23/00 , D06M101/00 , D06M101/02 , D06M101/06 , D06M101/16 , D06M101/18 , D06M101/20 , D06M101/22 , D06M101/24 , D06M101/30

69. 发明专利

JPS6452814A POLYSULFONE HOLLOW FIBER MEMBRANE AND PRODUCTION THEREOF 失效
公开(公告)号：JPS6452814A
公开(公告)日：1989-02-28
申请号：JP21095787
申请日：1987-08-24
申请人： KURARAY CO
发明人： OKAMOTO TAKEHIKO , SHIRAGAMI HIROSHI
IPC分类号： D01F6/76 , B01D69/08 , B01D71/68 , D01D5/06 , D01D5/247 , D01F6/00
摘要： PURPOSE:To obtain the titled hollow fiber membrane suitable for external pressure whole filtration system, applicable to e.g. purifying tap water etc., by dry-wet spinning, under specified conditions through an annular nozzle, of a stock solution prepared by dissolving polysulfone and a fine pore-forming agent in a solvent common therefor. CONSTITUTION:When a hollow fiber membrane is to be produced by dry-wet spinning, through extrusion from an annular nozzle, of a stock solution prepared by dissolving polysulfone and a fine pore-forming agent (e.g. polyethylene glycol) in a solvent common therefor (e.g. DMF), (A) the dry zone atmosphere is kept at a state of either dry air with a dew point of =100Angstrom on the external surface, having fine pores of an average size 200-300Angstrom at an open cell rate 5-10% on the internal surface also with the interior of the membrane representing a finely porous structure.

70. 发明专利

JPS63305903A FILTER VESSEL FOR HOLLOW YARN FILTRATION FILM 失效
公开(公告)号：JPS63305903A
公开(公告)日：1988-12-13
申请号：JP14151987
申请日：1987-06-08
申请人： JGC CORP , KURARAY CO
发明人： SHIBATA SETSUO , HASEGAWA AKIRA , ODANO YOSHIAKI , OKAMOTO TAKEHIKO
IPC分类号： B01D63/02 , B01D63/04
摘要： PURPOSE:To prevent disturbance and breakage of hollow yarn which are caused by bubbles and messes of air rising in a vessel at a time for drawing out backwash water by providing an air diffuser to the upper part of an extraction port of drain in the filter vessel for a hollow yarn filtration filter. CONSTITUTION:An air diffuser 7 provided with a baffle plate 8 having many holes or slits is provided to the upper part of an extraction port 6 of drain provided to the bottom part of a filter vessel 1. Thereby at a time for drawing out backwash water after finishing operation of back-wash, it is prevented that the air stagnating in a pipeline 5 of drain becomes bubbles or masses and suddenly rises in the filtration vessel 1. In other words, the air is stored and dispersed with the air diffuser 7 and made to extremely small bubble shapes and rises in the vessel 1. Therefore disturbance and breakage of hollow yarn constituting the hollow yarn filtration filter modules 4 are prevented without giving irregular movement to the modules 4.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式