A fiber for artificial hair constituted of a resin composition containing an aliphatic polyamide. A weight average molecular weight Mw of a dissolved component obtained when the fiber for artificial hair is dissolved in hexafluoroisopropanol is 46,000 or more and less than 65,000.

For presenting the hair having a natural hair form when applied to the wig, there are provided a method of processing a hair for a wig, a method of manufacturing the wig and a manufactured wig, comprising: a cutting step of cutting a human hair that is a person's hair, in a predetermined length; an alignment step of expanding a plurality of cut human hairs and arraying the plurality of cut human hairs in a line; a fixing step of attaching and fixing the plurality of arrayed human hairs to a fixing pad so that the human hair is not detached; and a polishing step of polishing both longitudinal side portions of the human hair to make the side portions pointed using a polishing member including a polishing roller such that the side portions include tapered portions that are made thinner toward a tip of hair.

A polyvinyl chloride-based fiber for artificial hair that has excellent low glossiness and grip performance when woven and can be stably spun. Configuring a fiber for artificial hair using a polyvinyl chloride-based resin composition, wherein the polyvinyl chloride-based resin includes, at predetermined blending amounts, a polyvinyl chloride-based resin (A) having a viscosity-average polymerization degree of 450-1,700 and a crosslinked vinyl chloride-based resin (B) in which the viscosity-average polymerization degree of a component that dissolves in tetrahydrofuran is 1,800-2,300, the difference between the viscosity-average polymerization degree of the polyvinyl chloride-based resin (A) and the viscosity-average polymerization degree of the THF-soluble component of the crosslinked vinyl chloride-based resin (B) is in a predetermined range, and the cross-sectional shape of the fiber for artificial hair has a first projection, a second projection, and a third projection and the lengths and widths thereof satisfy predetermined conditions.

A conjugate fiber including a core part and a sheath part covering the core part such that the conjugate fiber has a core-to-sheath area ratio of core:sheath=2:8 to 7:3 and an eccentricity of 5% or more in a cross section thereof. The cross section is in a multilobed shape and has a major axis of length L and a first minor axis of length Si y satisfying a ratio of L/S1 being 1.10-3.00. The core part has a major axis of length Lc and a first minor axis of length Sc satisfying a ratio of Lc/Sc being 1.10-3.00. The major axis of the core part is in a direction that substantially coincides with a direction of the major axis of the cross section.

A fiber for artificial hair, having a base fiber, a metal ion, and an antistatic agent, in which the metal ion and the antistatic agent are present in at least a part of a surface of the base fiber, the metal ion is at least one selected from the group consisting of a silver ion, a zinc ion, and a copper ion, a content of the metal ion is 5.010.sup.5 to 1.010.sup.2% by mass based on the total mass of the fiber for artificial hair, the antistatic agent is at least one selected from the group consisting of a cationic antistatic agent and a non-ionic antistatic agent, and a content of the antistatic agent is 0.001 to 1% by mass based on the total mass of the fiber for artificial hair.

An acrylic fiber for artificial hair may include an acrylic copolymer. The acrylic fiber has a fiber cross section including 2 to 4 T-shaped protrusions that extend radially from a central portion. Each of the T-shaped protrusions has an arc-shaped upper side that bulges in a direction away from the central portion. A circumradius of the fiber cross section is 40.0 to 60.0 m. A distance between adjacent end portions of the corresponding upper sides of the adjacent T-shaped protrusions is 3.0 to 60.0 m. An axial width is 10.0 m or more. Torsional rigidity of the acrylic fiber is 0.30 to 2.0 mg.Math.cm.sup.2. The acrylic fiber for artificial hair has high volume, good texture, and good twist processability, and a hair ornament may include the acrylic fiber for artificial hair.

A fiber for artificial hair with low thermal shrinkage, low luster, and excellent spinnability, structured by a resin composition containing a vinyl chloride-based resin and a maleimide-based copolymer, wherein: 50 to 99 mass % of the vinyl chloride-based resin is contained in 100 mass % of the resin composition; 1 to 50 mass % of the maleimide-based copolymer is contained in 100% of the resin composition; and when a total of an aromatic vinyl-based monomer unit, a cyanide vinyl-based monomer unit, an unsaturated acid anhydride monomer unit, and a maleimide-based monomer unit in the maleimide-based copolymer is 100 mass %, the maleimide-based copolymer has 5 to 30 mass % of the maleimide-based monomer unit.

A fiber-treating agent including a condensate formed from the following components (A) and (B), and a component (C). A total content of a constituent element derived from the component (A) and a constituent element derived from the component (B) is more than 1 mass %, and a turbidity is 1,000 NTU or less: (A): formaldehyde or a hydrate thereof, (B): triazine or a derivative thereof of formula (1):

##STR00001## where R.sup.1 to R.sup.3 are the same or different, and each represent a hydrogen atom, a hydroxymethylamino group, an amino group, a hydroxy group, a halogen atom, a phenyl group, a linear or branched alkyl group or alkenyl group having 1 or more and 6 or less carbon atoms, or a linear or branched alkoxy group or alkenyloxy group having 1 or more and 6 or less carbon atoms, and (C): water.

A problem to be solved of the invention is to provide a fiber for artificial hair comprising polyamide, which has a glossy feeling with suppressed luster similar to natural hair, is excellent in persistent antistatic properties, and also excellent in heat-setting properties. The means for solving the problem is a fiber for artificial hair comprising a thermoplastic polyamide and a polymeric antistatic agent having compatibility with the thermoplastic polyamide, wherein the polymeric antistatic agent has a melting point equal to or lower than the melting point of the thermoplastic polyamide.

A fiber-treating agent, where the fiber-treating agent is a one part fiber-treating agent including a single composition or a multiple-part fiber-treating agent including a plurality of compositions. The fiber-treating agent contains the following components (A) to (C) in a total composition thereof, and where, for the one-part fiber-treating agent, a part or all of the components (A) and (B) is optionally a condensate formed from the components: (A): a compound having a structure wherein a methylol group is bonded to each of two nitrogen atoms in the compound, (B): a phenolic compound having an electron donating group on at least one of meta-positions and a hydrogen atom on at least one of ortho-positions and a para-position, wherein the electron donating group on the meta-position optionally forms, together with adjacent carbon atoms, a benzene ring optionally substituted with a hydroxy group, and (C): water.