Acrylic fiber for artificial hair, hair ornament product including the same, and production method therefor

An acrylic fiber for artificial hair comprising an acrylic copolymer,

• wherein a fiber cross-section of the acrylic fiber for artificial hair 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 with the hollow portion are apart from each other or are in contact with each other, a circumcircle of the fiber cross section has a diameter of 70 μm or more and 100 μm or less, an inscribed circle of the fiber cross section has a diameter of 15 μm or more and 50 μm or less, a thickness of the fiber cross section is 13 μm or more and 40 μm or less, and a canal width between the ends of the fiber cross section is 0 μm or more and 15 μm or less, and
• the acrylic fiber for artificial hair has a torsional rigidity of 1.3 mg·cm2 or more.