The invention provides an antimicrobial fiber which exhibits excellent antimicrobial properties even without the addition of antimicrobial agents and can remain antimicrobial even after repeated washing. The antimicrobial fiber comprises a fiber having on a surface thereof a polyacetal copolymer (X) containing oxyalkylene groups, the molar amount of oxyalkylene groups in the polyacetal copolymer (X) being 0.2 to 5 mol % relative to the total of the molar amount of oxymethylene groups and the molar amount of oxyalkylene groups.

The invention provides an antimicrobial fiber which exhibits excellent antimicrobial properties even without the addition of antimicrobial agents and can remain antimicrobial even after repeated washing. The antimicrobial fiber comprises a fiber having on a surface thereof a polyacetal copolymer (X) containing oxyalkylene groups, the molar amount of oxyalkylene groups in the polyacetal copolymer (X) being 0.2 to 5 mol % relative to the total of the molar amount of oxymethylene groups and the molar amount of oxyalkylene groups.

A method for producing a nonwoven fabric is provided. The method includes spinning a molten aromatic polysulfone resin from a nozzle and extending it with a high temperature fluid ejected at high speed, thereby obtaining the aromatic polysulfone resin in a fibrous form, and collecting the aromatic polysulfone resin obtained in a fibrous form on a moving collecting member. The aromatic polysulfone resin has a melt mass flow rate of 130 g/10 min or more under conditions of a test temperature of 400° C. and a nominal load of 2.16 kg, which is determined based on ASTM D 1238. A distance from the nozzle to the collecting member is set to 30 mm or less.

Electret webs include a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additive is a substituted-benzoic acid or a substituted-benzoate salt. The benzoic acid and benzoate salts are substituted by a hydroxyl or amino group at the ortho position or 1 position of the benzene ring. The benzene ring may contain additional substituent groups. The substituted-benzoate salt may have a monovalent, divalent, or trivalent metal counteraction.

The invention concerns a cosmetic patch product comprising a membrane substrate suitable to be absorbed by the skin, made up of at least one electrospun fiber based on a biocompatible polymer material, as well as a cosmetic article that comprises the same cosmetic patch product on a support base.

The invention concerns a cosmetic patch product comprising a membrane substrate suitable to be absorbed by the skin, made up of at least one electrospun fiber based on a biocompatible polymer material, as well as a cosmetic article that comprises the same cosmetic patch product on a support base.

A fiber nonwoven fabric includes a fiber containing an aromatic polyether ketone, and a coefficient of variation in a fiber diameter of the fiber is 100% or less.

A fiber nonwoven fabric includes a fiber containing an aromatic polyether ketone, and a coefficient of variation in a fiber diameter of the fiber is 100% or less.

Provided is a blood filter that resists deterioration in properties as a result of electron beam sterilization treatment performed before or during use as a blood filter, has durability, dimensional stability, and chemical resistance at excellent levels, also has biocompatibility, and resists deterioration in properties even upon the electron beam sterilization treatment. The blood filter according to the present invention includes a nonwoven fabric made of PEEK fibers. Preferably, the blood filter according to the present invention has an average pore size of 3 to 280 μm and has a porosity of 15% to 70%; and the PEEK fibers have an average fiber diameter of 10 μm or less.

A method of forming an acid-doped polyaniline (emeraldine salt) (PANi-ES) solution including steps of: (i) mixing polyaniline (emeraldine base) (PANi-EB) with a PANi-EB solvent and a gel-inhibitor to form a gel-inhibited PANi-EB solution; (ii) removing the gel-inhibitor from the gel-inhibited PANi-EB solution to form a PANi-EB solution; and (iii) adding an acid dopant to the PANi-EB solution to form a PANi-ES solution.