FIBER BUNDLE FOR ARTIFICIAL HAIR AND HAIR ORNAMENT PRODUCT INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Sep 26, 2024
app pub date -
May 31, 2024
filing date -
Dec 10, 2021
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Abstract
A fiber bundle for artificial hair contains two or more types of core-sheath conjugate fibers having different core-to-sheath area ratios. Each of the core-sheath conjugate fibers includes a core and a sheath, and the core-to-sheath area ratio is represented by the area ratio between the core and the sheath. In each of the core-sheath conjugate fibers, the core includes a polyester resin composition containing a polyester resin, and the sheath includes a polyamide resin composition containing a polyamide resin. The standard deviation of the ratios of the core cross-sectional area to the fiber cross-sectional area of the core-sheath conjugate fibers contained in the fiber bundle for artificial hair is 0.15 or more. The fiber bundle for artificial hair has touch and appearance similar to those of human hair, and have favorable curl setting properties and usage durability, and a hair ornament product including the same are provided.
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