US 12,171,322 B2
Hair holder and hair treatment method using same
Yoshiyuki Kibe, Utsunomiya (JP); and Takehiko Tojo, Utsunomiya (JP)
Assigned to KAO CORPORATION, Tokyo (JP)
Appl. No. 17/438,061
Filed by KAO CORPORATION, Tokyo (JP)
PCT Filed Mar. 13, 2019, PCT No. PCT/JP2019/010395
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/183677, PCT Pub. Date Sep. 17, 2020.
Prior Publication US 2022/0248826 A1, Aug. 11, 2022
Int. Cl. A45D 7/04 (2006.01); A45D 2/18 (2006.01)
CPC A45D 7/045 (2013.01) [A45D 2/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hair holder including a tubular body which has: a first opening located at one end; and a second opening located at the other end, and which is configured to allow a lock of hair to be inserted from the first opening toward the second opening and to be capable of being rolled up, the tubular body having a longitudinal direction and a width direction that is orthogonal to the longitudinal direction,
wherein the tubular body has two sheets that form outer surfaces, and
at least one of the two sheets is formed of a color-changeable sheet that satisfies conditions (1) and (2) below:
(1) an L* value in an L*a*b* color coordinate space is 90 or less; and
(2) a color difference ΔE*ab value in the L*a*b* color coordinate space between before and after impregnation with a standard hair treatment agent is 1.0 or greater, the standard hair treatment agent containing ammonium thioglycolate in an amount of 6 mass %, ammonium hydrogencarbonate in an amount of 2 mass %, and disodium edetate in an amount of 0.5 mass %, the balance being water, and the standard hair treatment agent being adjusted to a pH of 8.4 at 20° C. using a 28 mass % aqueous solution of ammonia, and
wherein said color-changeable sheet contains therein a color material that is kneaded into a resin that constitutes raw material fibers of said color changeable sheet, and wherein the color material contains an acid-base indicator, a dye, a pigment or a combination thereof.