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 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 invention relates to a method and to a device for producing a crimped composite thread. The crimped composite thread includes a first polymer melt and a second polymer melt. The first polymer melt and the second polymer melt are arranged next to one another, in particular side-by-side, in portions in such a way that a composite thread is formed. The first polymer melt and the second polymer melt each have a different material property so that self-crimping of the composite thread is initiated by means of an active crimping initiation. Additionally, there is a system for producing a crimped composite thread from a bulk continuous filament yarn for carpet yarn using the method and the device.

An object of the present invention is to provide a method for producing protein spinning capable of securing a stable strength by securing sufficient interlacing between fibers. The method for producing a protein spun yarn of the present invention includes a step (a) of preparing a raw material spun yarn including an uncrimped artificial fibroin fiber containing modified fibroin and a step (b) of bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber.

An object of the present invention is to provide a method for producing protein spinning capable of securing a stable strength by securing sufficient interlacing between fibers. The method for producing a protein spun yarn of the present invention includes a step (a) of preparing a raw material spun yarn including an uncrimped artificial fibroin fiber containing modified fibroin and a step (b) of bringing the raw material spun yarn into contact with an aqueous medium to crimp the artificial fibroin fiber.

A device for shaping at least one thread-like material (1), which is formed in a forming unit and is deposited on a transporting device (6) for the subsequent thermosetting process, wherein a retaining means (4, 14, 15, 22) and a drivable, curved depositing tube (5) are arranged one after the other in the thread transporting direction.

A cooling material is provided. The cooling material can include a yarn having a defined denier of less than or equal to approximately 90 denier, wherein the yarn can comprise a cooling additive disposed on or in a polymer. In some embodiments, the yarn can be at least one of a warp or a weft of a woven fabric. A method can comprise receiving a cooling material, wherein the cooling material comprises: a polymer and a cooling additive, wherein the cooling additive is disposed on or in the polymer; and processing the cooling material by employing a non-weaving technique to create a non-woven fabric. In some embodiments, the non-weaving technique is one of a meltblown process, a spunbond process, or a multi-denier process.

The improved multifilament structure is a low denier, heat treated multifilament structure that provides for advantageous mechanical properties, including fray resistance, low shrinkage, high tensile strength and low elongation.

Provided are: acrylic fibers having 2-7% boiling water shrinkage and formed by the side-by-side conjugation of a copolymer A, which contains 5-10 mass % of an unsaturated monomer that can form a copolymer with acrylonitrile units, and a copolymer B, which contains 2-5 mass % of unsaturated monomer units that can form a copolymer with acrylonitrile units and 0.2-1.5 mass % of sulfonic acid group-containing monomer units; a method for manufacturing said fibers; a spun yarn containing said fibers; and a knitted fabric obtained from said spun yarn. The single fiber fineness of the heat-treated acrylic fibers is 1.7-6.6 dtex, the bulkiness is at least 380 cm3/g, the percentage of crimp is at least 15%, and the product (DKSDKE) of the knot strength (cN/dtex) and the knot elongation (%) is 10-25. The acrylic fibers have excellent crimp characteristics and anti-pilling properties.

A long-term cooling material is provided. The long-term cooling material includes: a yarn having a defined denier of less than or equal to approximately 70 denier and a defined yarn count; and a cooling mineral core disposed on the yarn and comprising nanosilver, wherein the cooling material is a material knit on a 28 gauge or greater knitting machine. In some embodiments, the yarn count can be greater than or equal to approximately 36 rows per inch. The yarn can include Nylon 6. An article of manufacture is provided. The article can include a non-cooling material disposed to be positioned over two or more portions of the body; and a cooling material disposed to be positioned on the non-cooling material at selected locations indicative of areas of the body prone to overheating.