US 12,622,477 B2Granted

Hair extension

OwnerRyuki Hiranoinventor

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Abstract

Problem Provided is a practical hair extension configured to be very easily attached to head hair (natural hair) and attachment of which on the head hair is less likely to be noticed by other people. Solution A hair extension 1 includes a hair bundle 2, a double-sided adhesive tape 3, and a release paper 4. The hair bundle 2 has a base end including a first hair layer L1 formed by laterally aligning a plurality of hairs h1, h1 . . . such that base end edges of the plurality of hairs are linearly arranged and bonding vicinities of the base ends of the hairs h1, h1 with an adhesive so as to have a constant adhesive width, and a second hair layer L2 formed by laminating a plurality of hairs h2, h2 . . . to be laterally aligned on an upper side of the first hair layer L1 such that base end edges of the plurality of hairs are linearly arranged and bonding vicinities of the base ends of the hairs h2, h2 . . . with an adhesive so as to have an adhesive width narrower than the adhesive width of the first hair layer L1. Furthermore, the double-sided adhesive tape 3 is stuck to the first hair layer L1.

A hair extension comprising:

a hair bundle composed with a first hair bundle and a second hair bundle that are a plurality of hairs,
a base end that is fixed to a proximal end of the hair bundle;
and
a double-sided adhesive tape that is stuck to the base end and is configured to attach the hair bundle to natural hairs of a user, wherein
the base end of the hair bundle includes:
a first base that is a mass of cured resin and has a thin layer shape such that a proximal end of the first hair bundle is retained inside the first base and the hairs of the first hair bundle extend from the first base in a vertical direction and align in a horizontal direction, which is perpendicular to the vertical direction, wherein the first base has a predetermined length in the vertical direction and a predetermined thickness in a thickness direction, which is perpendicular to both the vertical direction and the horizontal direction, and the first base has two surfaces facing in opposite directions to each other, and the double-sided adhesive tape is attached to one of the surfaces of the first base,
a second base that is a mass of cured resin and has a thin layer shape such that a proximal end of the second hair bundle is retained inside the second base, and the hairs of the second hair bundle extend from the second base in the vertical direction and align in the horizontal direction wherein the second base has a predetermined length in the vertical direction and a predetermined thickness in the thickness direction, wherein the second base is placed on the other of the surfaces of the first base, which is opposite from the double-sided adhesive tape,
the first base and the second base are both made of polyurethane-based resin,
the thicknesses of the first base and the second base are constant in the vertical direction and are each ranged from 0.05 mm to 0.4 mm, and the thickness of the second base is smaller than the thickness of the first base,
the length of the second base is shorter than the length of the first base, and
upper edges of the first base, the second base, and the double-sided adhesive tape in the vertical direction are aligned flush, forming an upper edge of the base end.

8 more elements

Abstract

Claims10