发明申请
- 专利标题: POLYMERIC POROUS HOLLOW FIBER MEMBRANE
- 专利标题(中): 聚合多孔中空纤维膜
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申请号: US12298456申请日: 2007-04-25
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公开(公告)号: US20090110900A1公开(公告)日: 2009-04-30
- 发明人: Hideyuki Yokota , Noriaki Kato , Hirofumi Ogawa , Junsuke Morita
- 申请人: Hideyuki Yokota , Noriaki Kato , Hirofumi Ogawa , Junsuke Morita
- 申请人地址: JP Osaka
- 专利权人: TOYO BOSEKI KABUSHIKI KAISHA
- 当前专利权人: TOYO BOSEKI KABUSHIKI KAISHA
- 当前专利权人地址: JP Osaka
- 优先权: JP2006-122042 20060426; JP2006-319646 20061128; JP2007-111754 20070420
- 国际申请: PCT/JP2007/058919 WO 20070425
- 主分类号: B32B3/26
- IPC分类号: B32B3/26 ; B32B5/24
摘要:
Purpose: To provide a polymeric porous hollow fiber membrane which exhibits excellent fractionation performance and excellent permeability in treatment of a variety of aqueous fluids and also shows sufficient strength when incorporated into a module or used to treat a fluid, and which is excellent in aging stability in these performances and characteristics and is also excellent in membrane performance recoverability by washing, and which is especially suitable for treatment of a polyphenol-containing beverage and is expected to effectively harmonize the flavor of such a beverage. Solution: A polymeric porous hollow fiber membrane of the present invention is characterized in that (a) the hollow fiber membrane has skin layers on its inner and outer surfaces; (b) the diameters of the pores in the inner surface are smaller than the diameters of the pores in the outer surface; (c) the porosity tends to increase from the inner surface toward the outer surface, and then tends to decrease from at least one portion having a maximum porosity, of the wall section of the membrane, toward the outer surface; and (d) the hollow fiber membrane satisfies a relationship of 2 [%]≦DR≦20 [%], wherein the critical diameter of a fine particle to be removed, found by a fine particle-passing test, is φmax [μm]; the diameter of the pores in the inner surface is dIS [μm]; and the proportion of the pores with dIS exceeding φmax is DR [%] This polymeric porous hollow fiber membrane is also characterized in that the adsorption of polyphenol per a surface area of 1 m2 defined by the inner and outer surfaces of the membrane is from 50 to 500 mg.
公开/授权文献
- US08881915B2 Polymeric porous hollow fiber membrane 公开/授权日:2014-11-11