Patent application number | Description | Published |
20090032455 | Potting Material, Hollow-Fiber Module, and Process for Producing the Same - An object of the present invention is to provide a potting agent that enables the reduction of crawling and ensures sufficient penetration between the porous hollow fibers in stationary potting. The potting agent of the present invention is a potting agent for fixing an end portion of a porous hollow fiber group composed of a plurality of porous hollow fibers, and contains a resin material and a filler. The content of the filler is equal to or less than the content of the filler at a rising point of a variation curve of viscosity of the potting agent to filler content. | 02-05-2009 |
20090301959 | Hollow Fibers, A Method of Manufacturing a Hollow Fiber Bundle, A Cylindrical Module of Hollow Fiber Membrane, and an Immersion Type Module of Hollow Fiber Membrane - The object of the invention is to provide: a hollow fiber bundle, a method of manufacturing the hollow fiber bundle, a cylindrical module of hollow fiber membrane, and an immersion type module of hollow fiber membrane wherein the hollow fibers are easy to apply scrubbing while maintaining specified intervals among the hollow fibers. A hollow fiber bundle bundling porous hollow fibers, including; hollow fibers | 12-10-2009 |
20100224548 | Screen-Like Object Made of Hollow Fibers, a Method of Manufacturing a Hollow Fiber Bundle, a Cylindrical Module of Hollow Fiber Membrane, and an Immersion Type Module of Hollow Fiber Membrane - The object of the invention is to provide: a screen-like object made of hollow fibers, a method of manufacturing a hollow fiber bundle, a cylindrical module of hollow fiber membrane, and an immersion type module of hollow fiber membrane wherein the hollow fibers are easy to bundle while keeping fiber-to-fiber intervals. The screen-like object made of hollow fibers includes: porous hollow fibers | 09-09-2010 |
20110031180 | Hollow-Fiber Module and Process for Producing The Same - An object of the present invention is to provide a method for manufacturing a hollow fiber module that makes it possible to decrease the spacing between a plurality of hollow fiber sheets and facilitate the formation of a potting portion with a two-layer structure. The method for manufacturing a hollow fiber module of a preferred embodiment includes: a first step of preparing a plurality of units in which a plurality of hollow fibers are fixed and provided side by side at the end portion side thereof on plate-shaped members; a second step of laminating the plurality of units so that portions of the plate-shaped members overlap via a first curable resin and filling a partial region on a side opposite the end portion side between the adjacent plate-shaped members with the first curable resin; and a third step of filling a region on the end portion side from the first curable resin between the adjacent plate-shaped members with a second curable resin having a hardness after curing that is higher than that of the first curable resin, and then curing the second curable resin. | 02-10-2011 |
Patent application number | Description | Published |
20090206035 | Vinylidene Fluoride Resin Hollow Filament Porous Membrane, Water Filtration Method Using the Same, and Process for Producing Said Vinylidene Fluoride Resin Hollow Filament Porous Membrane - A hollow-fiber porous membrane, comprising a hollow fiber-form porous membrane in a network texture of vinylidene fluoride resin showing a pore size distribution in a direction of its membrane thickness including an outer surface-average pore size P1 as measured by a scanning electron microscope and a membrane layer-average pore size P2 as measured by half-dry method giving a ratio P1/P2 of at least 2.5. The hollow-fiber porous membrane is excellent in long-term water filtration performance including efficiency of regeneration by air scrubbing. The hollow-fiber porous membrane is produced through a process, wherein a mixture of vinylidene fluoride resin, a plasticizer and a good solvent for vinylidene fluoride resin, is melt-extruded in a hollow-fiber film and cooled and formed into a solidified film within a cooling medium containing at least a certain proportion of a good solvent for vinylidene fluoride resin. | 08-20-2009 |
20090261034 | Vinylidene Fluoride Resin Hollow Fiber Porous Membrane and Method for Production Thereof - A hollow-fiber porous membrane comprising a hollow-fiber form of vinylidene fluoride resin and satisfying the following properties (A) and (B), is provided as a hollow-fiber porous membrane of vinylidene fluoride resin having an average pore size and a further uniform pore size distribution (A) and a large water permeation rate regardless of good efficiency of blocking minute particles (bacteria) (B), as represented by: (A) a ratio Pmax (1 m)/Pm of at most 4.0 between a maximum pore size Pmax (1 m) measured at a test length of 1 m according to the bubble point method and an average pore size Pm of 0.05-0.20 μm measured according to the half dry method; and (B) a ratio F (L=200 mm, v=70%)/PM | 10-22-2009 |
20090295038 | Vinylidene fluoride resin monofilament and process for producing the same - A monofilament obtained by smelt-spinning and stretching of a vinylidene fluoride resin is subjected to a high-temperature relaxation treatment for an extremely short period of 0.05-0.5 sec. within a high-temperature heating oil bath at a temperature of 140-175° C., thereby producing a vinylidene fluoride resin monofilament, which comprises a vinylidene fluoride resin having an inherent viscosity of at least 1.40 dl/g, and has a knot strength (JIS L1013) of at least 600 MPa and excellent anti-twist property represented by a twist index of at least 0.90 when measured after the monofilament being subjected to application for 1 minute of a tensile load equal to approximately 50% of a maximum tensile load (JIS K7113), removal of the load, and standing for 3 hours. | 12-03-2009 |