Abstract: An alkaline battery separator containing an alkali resistant fiber and a binder, wherein the alkaline battery separator has two surfaces which are a surface A that is smoother comparing with the other surface and has an arithmetic mean surface roughness Ra (A), and a surface B that is rougher and has an arithmetic mean surface roughness Ra (B), the amount of the binder is 5 to 20% by mass based on the total mass of the separator, a value obtained by dividing the arithmetic mean surface roughness Ra (A) by the arithmetic mean surface roughness Ra (B) [Ra (A)/Ra (B)] is 0.700 or more and 0.980 or less, and the arithmetic mean surface roughness Ra (B) of the surface B is 3.0 ?m or more and 10 ?m or less.

Abstract: The present invention relates to a separator for electrochemical elements, the separator comprising synthetic fibers and beaten cellulose fibers, wherein the beaten cellulose fibers have a Canadian standard freeness measured in accordance with JIS P 8121 of 50 ml or more and 500 ml or less, and in a fiber diameter distribution histogram of the beaten cellulose fibers, (1) the fibers have a maximum frequency peak in a range of 50 ?m or less, and (2) a ratio of the fibers having a fiber diameter of 20 ?m or less is 55% or more.

Abstract: To provide a separator which has a combination of a preferable air permeability enabling high prevention of internal short circuit and a high retention rate of such an air permeability in an electrolytic solution, and has more improved uniformity of the air permeability. A separator comprising a porous sheet and cellulose nanofibers, wherein the porous sheet comprises a binder component having the SP value of 11 to 16 (cal/cm3)1/2, and the porous sheet has the cellulose nanofibers at the inside and on the surface thereof, and wherein the cellulose nanofibers are combined with the porous sheet by fusion of the binder component.

Abstract: An alkaline battery separator containing an alkali resistant fiber and a binder, wherein the alkaline battery separator has two surfaces which are a surface A that is smoother comparing with the other surface and has an arithmetic mean surface roughness Ra (A), and a surface B that is rougher and has an arithmetic mean surface roughness Ra (B), the amount of the binder is 5 to 20% by mass based on the total mass of the separator, a value obtained by dividing the arithmetic mean surface roughness Ra (A) by the arithmetic mean surface roughness Ra (B) [Ra (A)/Ra (B)] is 0.700 or more and 0.980 or less, and the arithmetic mean surface roughness Ra (B) of the surface B is 3.0 ?m or more and 10 ?m or less.

Abstract: To provide a separator which has a combination of a preferable air permeability enabling high prevention of internal short circuit and a high retention rate of such an air permeability in an electrolytic solution, and has more improved uniformity of the air permeability. A separator comprising a porous sheet and cellulose nanofibers, wherein the porous sheet comprises a binder component having the SP value of 11 to 16 (cal/cm3)1/2, and the porous sheet has the cellulose nanofibers at the inside and on the surface thereof, and wherein the cellulose nanofibers are combined with the porous sheet by fusion of the binder component.

Abstract: Provided is a dispersant for carbon fibers which allows uniform dispersion of relatively long carbon fibers, e.g., carbon fibers with a length of 12.5 mm or more, particularly 10.0-100.0 mm, more particularly 12.5-50.0 mm in an aqueous medium. A dispersant for carbon fibers used by combining: (A) a random copolymer of phenylglycidyl ether and ethylene oxide, or a random copolymer of phenylglycidyl ether, ethylene oxide and propylene oxide; and (B) a polyether-based polyurethane resin based on a bifunctional polyol and hexamethylene diisocyanate, the bifunctional polyol being polyethylene glycol and/or an ethylene oxide-propylene oxide random copolymer.

Abstract: To provide a thermoplastic resin fiber to which a dispersant is attached, which can effectively disperse carbon fibers. A thermoplastic resin fiber to which a dispersant containing a random copolymer (A) of glycidyl ether and an alkylene oxide is attached in an amount of 0.1 to 20% by mass based on a total mass of thermoplastic resin fibers to which a dispersant is not attached.

Abstract: An object of the present invention is to provide: a capacitor separator which not only has a high strength but also exhibits a low internal resistance when used in a capacitor; and a method of producing the same. The present invention relates to A capacitor separator comprising fibrillated fibers consisting of a polyvinyl alcohol-based resin in an amount of not less than 30% by weight based on a total weight of the separator.

Abstract: An alkaline battery separator having alkali-resistant fibers, beaten cellulose fibers and a binder, wherein an overall freeness, in terms of CSF, is at least 700 ml and at most 765 ml; weight ratios of the alkali-resistant fibers and the beaten cellulose fibers are 28:72 to 72:28; the beaten cellulose fibers comprise mercerized natural wood fibers having a freeness, in terms of CSF, of at least 150 ml and less than 550 ml; and at least a portion of the alkali-resistant fibers is polyvinyl alcohol-based fibers.

Abstract: Provided is a dispersant for carbon fibers which allows uniform dispersion of relatively long carbon fibers, e.g., carbon fibers with a length of 12.5 mm or more, particularly 10.0-100.0 mm, more particularly 12.5-50.0 mm in an aqueous medium. A dispersant for carbon fibers used by combining: (A) a random copolymer of phenylglycidyl ether and ethylene oxide, or a random copolymer of phenylglycidyl ether, ethylene oxide and propylene oxide; and (B) a polyether-based polyurethane resin based on a bifunctional polyol and hexamethylene diisocyanate, the bifunctional polyol being polyethylene glycol and/or an ethylene oxide-propylene oxide random copolymer.

Abstract: The present invention relates to an alkaline battery separator comprising alkali-resistant fibers, beaten cellulose fibers, and a binder, wherein 1) an overall freeness, in terms of CSF, is at least 700 ml, wherein 2) weight ratios of the alkali-resistant fibers and the beaten cellulose fibers are 28:72 to 72:28, and wherein 3) the beaten cellulose fibers comprise mercerized natural wood fibers having a freeness, in terms of CSF, of at least 150 ml and less than 550 ml.