The present invention relates to a fiber for artificial hair having a hollow in a center of a fiber cross section. A ratio of an area of the hollow to an entire area of the fiber cross section is 5% to 50%. The fiber cross section has a flat multilobed shape, and the hollow has a first side and a second side that are inclined 70 to 110 degrees relative to a major axis of the fiber cross section. The present invention also relates to hair ornament products including the above fiber for artificial hair. Thus, the present invention provides a fiber for artificial hair having a favorable curl setting property when curling with a hair iron and a favorable combing property after curling with a hair iron, and hair ornament products including the same.

The present invention relates to a fiber for artificial hair having a hollow in a center of a fiber cross section. A ratio of an area of the hollow to an entire area of the fiber cross section is 5% to 50%. The fiber cross section has a flat multilobed shape, and the hollow has a first side and a second side that are inclined 70 to 110 degrees relative to a major axis of the fiber cross section. The present invention also relates to hair ornament products including the above fiber for artificial hair. Thus, the present invention provides a fiber for artificial hair having a favorable curl setting property when curling with a hair iron and a favorable combing property after curling with a hair iron, and hair ornament products including the same.

To provide a reversibly thermochromic composite fiber having a reversible color change due to a temperature change, having such excellent flame retardancy that flame is hard to spread even if ignition occurs once, and having high safety. [Solution] Disclosed is a sheath-core type reversibly thermochromic composite fiber including a core comprising a resin, a reversibly thermochromic pigment, and a flame retardant, and a sheath comprising a resin and a flame retardant.

Described is a doll head with box braid hair and associated method for forming such a doll head. The doll head has an exterior scalp surface with a box rooting pattern formed thereon. The box rooting pattern includes a plurality of distinct box shapes separated by un-patterned scalp. A plurality of hair filaments are rooted within each of the distinct box shapes and extend therefrom. Notably, the hair filaments within each of the distinct box shapes are braided together to form a hair box braid extending from and bound on the exterior scalp surface by the distinct box shape.

Described is a doll head with box braid hair and associated method for forming such a doll head. The doll head has an exterior scalp surface with a box rooting pattern formed thereon. The box rooting pattern includes a plurality of distinct box shapes separated by un-patterned scalp. A plurality of hair filaments are rooted within each of the distinct box shapes and extend therefrom. Notably, the hair filaments within each of the distinct box shapes are braided together to form a hair box braid extending from and bound on the exterior scalp surface by the distinct box shape.

A combination has a flat fabric doll with applied grommets for attaching reversible clothing and accessories. A doll head and torso joins by sewing to a front surface with arms and legs extending from beneath and adding depth to the doll. Grommets join to the torso and to reversible clothing. A brad or button threaded with pipe cleaner passes through the reversible clothing grommet and the doll torso grommet and exits the rear surface and bends for securement. A grommet applied above the head on the front surface receives a fabric loop for holding flat a doll during play. The invention also has another loop or label upon the rear surface that secures the doll to a stand by slipping over an upright pole of the stand.

A combination has a flat fabric doll with applied grommets for attaching reversible clothing and accessories. A doll head and torso joins by sewing to a front surface with arms and legs extending from beneath and adding depth to the doll. Grommets join to the torso and to reversible clothing. A brad or button threaded with pipe cleaner passes through the reversible clothing grommet and the doll torso grommet and exits the rear surface and bends for securement. A grommet applied above the head on the front surface receives a fabric loop for holding flat a doll during play. The invention also has another loop or label upon the rear surface that secures the doll to a stand by slipping over an upright pole of the stand.

A polyester-based fiber for artificial hair includes a polyester-based resin composition, wherein the polyester-based resin composition includes: 100 parts by weight of a polyester resin; 5 to 40 parts by weight of a brominated epoxy-based flame retardant; 0.05 to 3 parts by weight of a polyester resin molecular weight modifier; and 0.2 to 3 parts by weight of a phosphite-based compound, and wherein the polyester resin is one or more selected from the group consisting of polyalkylene terephthalate and a copolymerized polyester including polyalkylene terephthalate. A method for producing the polyester-based fiber for artificial hair includes melt kneading the polyester resin composition and melt spinning the polyester resin composition after the melt kneading into yarns. A hair ornament product includes the polyester-based fiber.

A polyester-based fiber for artificial hair includes a polyester-based resin composition, wherein the polyester-based resin composition includes: 100 parts by weight of a polyester resin; 5 to 40 parts by weight of a brominated epoxy-based flame retardant; 0.05 to 3 parts by weight of a polyester resin molecular weight modifier; and 0.2 to 3 parts by weight of a phosphite-based compound, and wherein the polyester resin is one or more selected from the group consisting of polyalkylene terephthalate and a copolymerized polyester including polyalkylene terephthalate. A method for producing the polyester-based fiber for artificial hair includes melt kneading the polyester resin composition and melt spinning the polyester resin composition after the melt kneading into yarns. A hair ornament product includes the polyester-based fiber.

Systems and methods related to a curly hair doll are provided. A doll includes a head and a plurality of material strands coupled to the head to embody curls of hair. Each material strand may define a three-dimensional (3D) helix formed by a two-dimensional (2D) spiral cut into a flat piece of flexible material. Additional systems and associated methods are also provided.