JPS6226414Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to processed hair for direct hair transplantation to the human skin, and particularly relates to processed hair that allows tissue to recover quickly after hair transplantation and has a good fixation rate. It is something.

In recent years, processed hair for direct hair transplantation to human skin has been developed, and some of it has been put into practical use. In particular, various improvements have been proposed regarding the shape of the hair root in order to increase the retention rate of transplanted hair.

In recent years, a method has been proposed in which one end of synthetic resin artificial hair is wound to form a loop and tied tightly to provide a hair root. This method is economically superior as a method of forming hair roots without going through complicated processes such as plastic working, but even if tied tightly, the knot will loosen over time, and eventually the knot will become loose. Since the knot is considerably thicker than the diameter of the hair root, the wound area becomes large during hair transplantation, resulting in a high rate of hair removal from the transplanted hair.

The present invention is an improvement in order to eliminate the above-mentioned drawbacks.

That is, the present invention has the following features: 1. The base end of hair made of synthetic resin selected from polyester fibers, polyethylene fibers, or polypropylene fibers is wound to form a loop-shaped part 3, and the end part 5 is attached to the hair shaft 1. The shape of the loop portion 3 has a maximum outer diameter of 0.8 to 1.5 mm and a minimum outer diameter of 0.6 to 1.1 mm, and the length of the end portion 5 is 0.7 mm. Processed hair for hair transplantation, which has a diameter of 1.2 mm and further fixes the intersection point or contact point 4 with the hair shaft 1 by thermal bonding using high-frequency point welding technology to form a hair root portion 2 in the shape of a real vertebra.

2. Processed hair for hair transplantation as set forth in claim 1 of the utility model registration, in which the surface of the hair root portion 2 is coated with a synthetic resin.

The "actual shape of the vertebrae" stated in the claims for the utility model registration of the present invention is substantially the shape of 〓 where the lower part is circular and the head is pointed with the same angle as acute angle A. It is also called "teardrop shape".

Next, an embodiment of the processed hair for hair transplantation of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the processed hair for hair transplantation of the present invention has a loop-shaped part 3 formed by winding the base of the hair, and an end part 5 of the hair at an acute angle A with respect to the hair root part 1.
The hair root part 2 is formed by making the hair root part 2 protrude and fixing the intersection point 4 with the hair root part 1 with thermal adhesive 8 using high frequency point welding technology.

In this embodiment, the hair root 1 and the end 5 intersect obliquely to form an intersection 4, but as shown in FIG. 2 of another embodiment, at the intersection 4, the end 5
The end portion 5 may be made to protrude by bending the hair so that the hair root portion 1 and the end portion 5 form an acute angle A.

The hair used is preferably artificial hair made of thermoplastic single fibers that are less toxic to human tissues, such as polyester fibers, polyethylene fibers, and polypropylene fibers. In particular, polyester fibers are most preferred because they have excellent physical properties as artificial hair, such as heat resistance and durability.

Further, as shown in FIGS. 5 and 6, it is preferable to provide a protective coating over the entire hair root 2 in order to reinforce the bonding point and increase the strength of the end 5.

As the material for the protective coating 6, it is preferable to use an aqueous solution of polyvinyl alcohol or a film-forming material prepared by dissolving polyethylene, polyamide, or the like in a suitable solvent.

The intersection point 4 in the loop upper part 3 of artificial hair made using thermoplastic synthetic resin such as polyethylene, polypropylene, or polyester is connected to the intersection point 4 by high frequency as shown in FIGS. 1 and 2. Fusion can be easily achieved by fixing by thermal bonding 8 using point welding technology.

This high-frequency point welding technology is used for processing plastics, etc., and involves bringing a vibrator made of a connected piezoelectric element into contact with the workpiece during the high-frequency generation period, applying high-frequency vibration to the workpiece, and localizing the contact area. It is a material that is melted and bonded,
By adjusting the frequency and strength of the current, the adhesive force of the adhesive part can be freely controlled, making it possible to always produce uniform products.

Hair root part 2 of the present invention formed in this way
is mainly composed of a water droplet-shaped loop portion 3 and a protruding end portion 5, but the maximum outer diameter of the loop portion 3 is
It is extremely minute, with a minimum outer diameter of 0.6 to 1.1 mm and a length of the end portion 5 of 0.7 to 1.2 mm.

In the present invention, by setting the shape of the loop portion 3 to each of the above values, the shedding rate of the transplanted hair is reduced, and the hair retention rate is therefore improved.

The reason why the maximum outer diameter of the above-mentioned shape is limited to 0.8 to 1.5 mm is that if it deviates from 0.8 to 1.5 mm, a part or end 5 of the loop-shaped part 3 will not only come out of the skin and easily fall off, but also This is because the repulsive force near the bottom of the loop-shaped part 3 disappears, and the loop deflates due to the resistance of the tissue during insertion, and the fibrous tissue no longer penetrates the inside of the loop, and the artificial hair is not fixed, resulting in a high hair removal rate. .

The reason for limiting the minimum outer diameter to 0.6 to 1.1 mm is
If it deviates by more than 0.6 to 1.1 mm, it will not only be difficult to hook the hair transplant needle into the loop during hair transplantation, but also
When tissue fibrosis occurs due to a foreign body reaction, there is little fibrous tissue that penetrates the loops and is formed, so the strength to fix the artificial hair is insufficient, and when washing, styling, or tying the hair, it is difficult to This is because it will fall out.

The reason why the length of the end portion 5 is limited to 0.7 to 1.2 mm is that if the upper limit exceeds 1.2 mm, the bending moment applied to the thermally bonded part will increase when external force is applied. This is because the end portion easily deforms in the direction of an obtuse angle under a small tensile load and does not have a hook effect. Furthermore, if the lower limit length is shorter than 0.7 mm, the angle will not change but the hooking action will be extremely reduced and the provision of the end portion 5 will be meaningless.

Therefore, the length of the above range was determined experimentally to ensure that the artificial hair does not lose its physical locking force under a constant load (approximately 30 g) when the artificial hair is in the tissue. be.

Next, the reason why the end portion 5 of the artificial hair is made to protrude at an acute angle A with respect to the hair trunk 1 is because the root of the end portion is thermally bonded using high-frequency point welding technology. When force is applied,
Acts as an elastic body. After hair transplantation, it usually takes about 30 days for the formation of fibrous connective tissue in the loop due to a foreign body reaction, so in the early stages after hair transplantation,
I can't hope for artificial hair to stay in place.

Therefore, the purpose is to physically fix the artificial hair by the hook action until it is fixed by the fibrous tissue by the end portion 5 forming the acute angle A.

Generally, human hair has a diameter of 0.06 to 0.095 mm, but synthetic hair has a diameter of around 0.09 mm, although it varies somewhat depending on the material.
When the loop-shaped part 3 is formed with 0.1 to 0.08 mm artificial hair by thermal bonding, it becomes a real shape of a vertebra as shown in Figures 1 and 2 of the present invention. When hooked up and inserted into the tissue,
The elasticity of the intersection and the tension of the loop work together to fully restore this loop within the tissue, and therefore, it is fully expected that fibrous connective tissue will be generated within the loop due to a foreign body reaction, thereby creating artificial hair. is firmly fixed to the scalp tissue.

In addition, a hole 9 formed inside the loop-shaped portion 3
This is for inserting the bifurcated portion at the tip of the hair transplant needle during hair transplantation, and also serves to prevent the processed hair from falling off after the hair transplantation.

That is, as shown in FIG. 3, the forked part 14 at the tip of the hair transplant needle 13 pinches the lower end of the loop-shaped part 3 of the hair root 2, penetrates the epidermis 10 and the dermis 11, and reaches the subcutaneous tissue 12. When the hair transplant needle 13 is gently pulled out, the protruding end 5 of the hair root 2 protrudes at an acute angle A with respect to the hair shaft 1, which prevents the hair from returning, and the hair root 2 As shown in FIG. 4, it remains in the subcutaneous tissue 12. If the wound closes up in a few days and the subcutaneous tissue in the hole 9 recovers, the hair root 2
is completely retained by the subcutaneous tissue 12, thereby preventing the implanted processed hair from falling off.

In particular, the thickness of the intersection point 4 of the processed hair of the present invention is extremely thin compared to the hair roots obtained by other methods, so the wound that occurs during hair transplantation is small, and less of the processed hair falls off immediately after hair transplantation. Tissue recovery is rapid,
It has an extremely high hair retention rate.

[Brief explanation of drawings]

FIGS. 1 and 2 show examples of processed hair of the present invention. FIG. 1 is a front view thereof, and FIG. 2 is a front view showing another embodiment. FIG. 3 is an explanatory diagram showing the method of transplanting processed hair according to the present invention, and FIG. 4 is an explanatory diagram showing the state in which the hair has been implanted. Figures 5 and 6 are
Fig. 2 shows an embodiment in which a protective coating is provided over the entire hair root of the processed hair of the present invention. Explanation of symbols, 1...hair trunk, 2...hair root, 4
... Intersection, 8 ... Thermal bonding by high frequency point welding technology, 5 ... End, 13 ... Flocking needle.

Claims (1)

[Claims for Utility Model Registration] 1. The base end of hair made of synthetic resin selected from polyester fibers, polyethylene fibers, or polypropylene fibers is wound to form a loop-shaped portion 3, and the end portion 5 is wrapped around the hair shaft 1. The shape of the loop portion 3 has a maximum outer diameter of 0.8 to 1.5 mm, a minimum outer diameter of 0.6 to 1.1 mm, and a length of the end portion 5. is 0.7 to 1.2 mm, and the intersection point or contact point 4 with the hair shaft 1 is further fixed by thermal bonding using high-frequency point welding technology to form a hair root portion 2 in the shape of a real vertebra. 2. Processed hair for hair transplantation as set forth in claim 1 of the Utility Model Registration Claim, wherein the surface of the hair root portion 2 is coated with a synthetic resin.