Abstract: A potting material for membrane modules which is formed of an epoxy resin composition, in which the mass change ratio of a cured product of the epoxy resin composition after being immersed in diethylene glycol methyl ethyl ether at 40° C. for one week is ±10% or less, and the mass change ratio thereof after being immersed in tetrahydrofurfuryl acrylate at 40° C. for one week is ±5% or less, and a hollow fiber membrane module which uses the potting material for membrane modules.

Abstract: A potting material for membrane modules which is formed of an epoxy resin composition, in which the mass change ratio of a cured product of the epoxy resin composition after being immersed in diethylene glycol methyl ethyl ether at 40° C. for one week is ±10% or less, and the mass change ratio thereof after being immersed in tetrahydrofurfuryl acrylate at 40° C. for one week is ±5% or less, and a hollow fiber membrane module which uses the potting material for membrane modules.

Abstract: Disclosed is a process for production of a porous membrane that includes the steps of layering a film-forming dope that contains a polymer (A) that forms a membrane base, a polyvinylpyrrolidone (B) and a solvent (C) into a single layer or two or more layers; immersing the film-forming dope in a solidifying fluid that is a non-solvent with respect to the polymer (A) and is a good solvent with respect to the polyvinylpyrrolidone (B); and removing the polyvinylpyrrolidone (B), wherein the polyvinylpyrrolidone (B) has a K value of 50 to 80, a mass ratio r of the polyvinylpyrrolidone (B) to the polymer (A) is 0.5 or more and less than 1, and the viscosity of the film-forming dope at a membrane production temperature is 100 to 500 Pa·s.

Abstract: A water purification cartridge is detachably provided inside a water purifier, which includes: a plurality of single cartridges, each of which includes a bottomed cylindrical casing body; and one or more ceiling wall portions which block upper end openings of the plurality of single cartridges, wherein the inside of the plurality of single cartridges becomes a filter medium storage portion, and wherein the plurality of single cartridges is disposed in the lateral direction and is detachably connected to each other.

Abstract: A hollow porous membrane with a reduced cost and excellent separation characteristic, water permeability, and mechanical strength and a process of producing the hollow porous membrane with an excellent adhesive property between a support and a porous membrane layer at a low cost are provided. The hollow porous membrane includes a porous membrane layer in which dense layers are disposed in the vicinities of an outer surface and an inner surface. In the process of producing the hollow porous membrane, membrane-forming dopes of a first membrane-forming dope and a second membrane-forming dope, which contain the material of the porous membrane layer and a solvent, are successively applied and stacked onto the outer circumferential surface of a hollow support and the applied membrane-forming dopes are simultaneously coagulated.

Abstract: Disclosed is a process for production of a porous membrane that includes the steps of layering a film-forming dope that contains a polymer (A) that forms a membrane base, a polyvinylpyrrolidone (B) and a solvent (C) into a single layer or two or more layers; immersing the film-forming dope in a solidifying fluid that is a non-solvent with respect to the polymer (A) and is a good solvent with respect to the polyvinylpyrrolidone (B); and removing the polyvinylpyrrolidone (B), wherein the polyvinylpyrrolidone (B) has a K value of 50 to 80, a mass ratio r of the polyvinylpyrrolidone (B) to the polymer (A) is 0.5 or more and less than 1, and the viscosity of the film-forming dope at a membrane production temperature is 100 to 500 Pa·s.

Abstract: A hollow porous membrane with a reduced cost and excellent separation characteristic, water permeability, and mechanical strength and a process of producing the hollow porous membrane with an excellent adhesive property between a support and a porous membrane layer at a low cost are provided. The hollow porous membrane includes a porous membrane layer in which dense layers are disposed in the vicinities of an outer surface and an inner surface. In the process of producing the hollow porous membrane, membrane-forming dopes of a first membrane-forming dope and a second membrane-forming dope, which contain the material of the porous membrane layer and a solvent, are successively applied and stacked onto the outer circumferential surface of a hollow support and the applied membrane-forming dopes are simultaneously coagulated.

Abstract: An electrophoresis apparatus that has a gel retaining layer; one or two sample solution storage portions disposed on either side or both sides of said gel retaning layer; two semi-permeable membranes disposed on the outer sides of said sample solution storage portions; buffer solution storage portions disposed on the outer sides of said semi-permeable membranes; a pair of electrodes disposed on the outer sides of said buffer solution storage portions; and at least one liquid inlet/outlet respectively provided in each of the sample solution storage portions and the buffer solution storage portions.