An acrylic fiber for artificial hair includes an acrylic polymer and an organic solvent that can dissolve the acrylic polymer, wherein the acrylic polymer includes 29.5 to 79.5% by weight of acrylonitrile, 20 to 70% by weight of vinyl chloride and/or vinylidene chloride, and 0.5 to 5% by weight of a sulfonic acid-containing vinyl monomer with respect to a total weight of the acrylic polymer, and wherein a content of the organic solvent in the acrylic fiber is 0.1 to 3% by weight.

Protein fibers for artificial hair include a polycation, wherein the protein fibers for artificial hair are crosslinked with an organic compound and/or a metal salt, and the protein fibers for artificial hair have curls. A method for producing the protein fibers for artificial hair includes treating artificial protein fibers that are crosslinked with an organic compound and/or a metal salt with a treatment solution containing a polycation, and curling the artificial protein fibers, or curling artificial protein fibers that are crosslinked with an organic compound and/or a metal salt, and treating the curled artificial protein fibers with a treatment solution containing a polycation.

The present invention relates to an acrylic fiber for artificial hair containing an acrylic copolymer. The dry-heat shrinkage ratio of the acrylic fiber after dry-heat treatment at 90 to 180 C. for 30 minutes is 30 to 70%, and the torsional rigidity thereof is 0.3 to 2.0 mg.Math.cm.sup.2. Also, one or more embodiments of the present invention relate to a crimped acrylic fiber for artificial hair containing an acrylic copolymer. In the crimped acrylic fiber, the number of crimps is 10 or more crimps per 10 cm, and the crimp height is 1.5 mm or more. In addition, in ten continuous crimps, at least two crimps differ in crimp width and at least two crimps differ in crimp height, while the crimps are formed in two or more different crimp directions.

The present invention relates to an acrylic fiber for artificial hair containing an acrylic copolymer. The fiber cross-section of the acrylic fiber has one or more shapes selected from the group consisting of a C-shape, a figure-6-shape, and a broad bean-shape with a hollow portion. Two ends of the C-shape, the figure-6-shape, or the broad bean-shape are apart from each other or are in contact with each other. A circumcircle of the fiber cross section has a diameter of 70 m or more and 100 m or less, an inscribed circle of the fiber cross section has a diameter of 15 m or more and 50 m or less, the thickness of the fiber cross section is 13 m or more and 40 m or less, and the canal width between the ends of the fiber cross section is 0 m or more and 15 m or less.

A colored fiber excellent in heat generation suppression property and fastness is provided. A method for manufacturing a colored fiber, and a fiber product is also provided. The colored fiber includes a fiber and a compound expressed by Formula (1) below.

##STR00001##

A hair replacement apparatus, system and method of use for hair replacement comprising a user-fitted mold, covering all or a portion of the crown of the user's head, upon which an anchor base is sized wherein the user's own hair acts as additional multiple points of contact to keep the anchor base in place.

A hair concealment method and apparatus is provided. The hair concealment apparatus includes a container, a cap, and a plurality of animal hairs disposed within the container. The static electricity is removed from the plurality of animal hairs and applied to the scalp of the user.

Process for a customized production of skin patches, for realizing a customized patch according to a shape of the scalp of a patient for hair thickening purposes, comprising the following main steps: (a) patient mapping to collect all the information and map the patient to create a digital copy of the same (digital twin) by 3D scanning and production of the template structure by 3D printing; (b) setting of the template for machining consisting in the application preferably of the compact elastic polyurethane; (c) application of the hair by approaching the same to the template connected to the suction system: o suction of the hair inside special holes; o heating the polymeric film close to the melting point, incorporating the hair therein so as to obtain the desired natural hair effect; o cooling.