Polyacrylonitrile-based fiber bundle for artificial hair, headdress product containing same, and method for manufacturing same

A polyacrylonitrile-based fiber bundle for artificial hair, comprising:

• polyacrylonitrile-based synthetic fibers A;
• and
• polyacrylonitrile-based synthetic fibers B,
• wherein the polyacrylonitrile-based synthetic fibers A have fiber cross-sections with 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,
• the polyacrylonitrile-based synthetic fibers B have fiber cross-sections with one or more shapes selected from the group consisting of a drop-shape with a hollow portion and a drop-shape,
• the polyacrylonitrile-based synthetic fibers A have a flatness ratio of less than 1.5, and the polyacrylonitrile-based synthetic fibers B have a flatness ratio of 1.5 or more,
• the C-shape, the figure-6-shape, or the broad bean-shape with the hollow portion of the fiber cross-sections has an inscribed circle with a diameter of 15 to 50 μm,
• the drop-shape with the hollow portion of the fiber cross-sections has an inscribed circle with a diameter of more than 0 μm and less than 15 μm,
• fiber cross-sections of the polyacrylonitrile-based fiber bundle for artificial hair have a thickness of 13 to 40 μm,
• the polyacrylonitrile-based fiber bundle for artificial hair has a total content of the C-shaped fiber cross-sections, the figure-6-shaped fiber cross-sections, and the broad bean-shaped fiber cross-sections with the hollow portions of 3 to 97%, and
• the polyacrylonitrile-based fiber bundle for artificial hair has a total content of the drop-shaped fiber cross-sections with the hollow portions and the drop-shaped fiber cross-sections of 3 to 97%.