Method for dyeing fibers for head ornament products containing regenerated collagen fibers

The method addresses mottled shades in dyeing blended fibers by using modified regenerated collagen fibers with specific compounds, ensuring consistent coloration between hair and accessories through improved dye transfer and matching.

WO2026014538A1PCT designated stage Publication Date: 2026-01-15KAO CORP
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Patent Information

Application Number
PCT/JP2025/024996
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-07-12
Filing Date
2025-07-11
Publication Date
2026-01-15

AI Technical Summary

Technical Problem

Blended fibers containing cellulosic and protein fibers, including those with regenerated collagen fibers, experience mottled shades when dyed with reactive dyes, leading to inconsistent coloration between hair and fibers in head accessories.

Method used

A method for dyeing fibers for head accessories using modified regenerated collagen fibers, comprising steps of attaching the accessory to dyed hair, wetting both together, and applying dye A, where the fibers contain compounds like benzoic acid or specific copolymers to improve color transfer and matching.

Benefits of technology

The method reduces color differences between hair and fibers, enhancing color matching effects by improving dyeability and fastness.

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Abstract

Provided is a method for dyeing fibers for head ornament products containing regenerated collagen fibers, wherein the regenerated collagen fibers include modified regenerated collagen fibers containing a predetermined compound (X). The method includes, in this order, a step (I) for attaching a hair ornament product including the fibers for hair ornament products to hair that has been dyed with a hair dye B and a step (II) for bringing the hair and the fibers for hair ornament products into a wet condition while the hair and the fibers are in contact with each other. The method further includes, before step (I) or between the step (I) and the step (II), a step (III) for applying a dye A to the fibers for hair ornament products.
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Citation Information

Patent Citations

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    JP2007277139A

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    JP3173142U