KR102276968B1 - Artificial eyelash - Google Patents

Abstract

The present invention relates to artificial eyelashes, and specifically, sodium hydroxide (NaOH) 12 to 25% (w/v), potassium hydroxide (KOH), a polybutylene terephthalate base yarn containing kaolin. 12 to 20% (w/v) and sodium carbonate (Na ₂ CO ₃ ) 2 to 5% (w/v) in an aqueous alkali solution and reacted at 90 to 110° C. for 120 to 180 minutes, but the yarn is immersed during the reaction process It relates to artificial eyelashes comprising; artificial hair processed by applying ultrasonic waves to an aqueous alkali solution.
The artificial eyelashes of the present invention can improve the problems of the existing artificial eyelashes, and the color is dark and matte, so it can give a natural aesthetic feeling similar to natural hair, and has a good touch feeling similar to natural hair, and expresses a curl design Ease of use is also excellent. In particular, there is an advantage in that the adhesion with the actual eyelashes is improved, so that the durability is excellent, and the operator can more easily operate the artificial eyelashes.

Description

Artificial eyelash {Artificial eyelash}

The present invention relates to artificial eyelashes, and specifically, sodium hydroxide (NaOH) 12 to 25% (w/v), potassium hydroxide (KOH), a polybutylene terephthalate base yarn containing kaolin. 12 to 20% (w/v) and sodium carbonate (Na ₂ CO ₃ ) 2 to 5% (w/v) in an aqueous alkali solution and reacted at 90 to 110° C. for 120 to 180 minutes, but the yarn is immersed during the reaction process It relates to artificial eyelashes comprising; artificial hair processed by applying ultrasonic waves to an aqueous alkali solution.

False eyelashes are cosmetic accessories used to replace real eyelashes or to attach them on top of eyelashes to make eyelashes look longer and fuller. Generally, it consists of a strip lash that is composed of several strands arranged on a strip and attached to the eyelashes, and one or several strands. It is provided as an extension lash configured to be extended by adhesion to actual eyelashes.

The artificial eyelashes that are generally used in the past are not being utilized in high value-added products because they do not meet the functions required for the product because they apply a PBT yarn of a simple circular cross section.

In fact, problems such as a heterogeneous and unnatural feeling due to the reflected light of artificial eyelashes, a problem with poor touch, and difficulties in expressing the desired curl design have been raised from consumers or practitioners who actually treat artificial eyelashes. In the case of lash, the existing artificial eyelashes have poor adhesion to real eyelashes, so the durability is poor and the procedure is not easy.

Accordingly, the present inventors have attempted to develop new artificial eyelashes that can improve the problems of the existing artificial eyelashes as described above.

Republic of Korea Patent No. 10-1542325 Republic of Korea Patent No. 10-1234507 Republic of Korea Patent Registration No. 10-1975712

Accordingly, the main object of the present invention is to provide a superior quality artificial eyelashes with improved adhesion, heterogeneous feeling, touch, and design expressiveness.

According to one aspect of the present invention, the present invention is a polybutylene terephthalate (polybutylene terephthalate) base yarn containing kaolin sodium hydroxide (NaOH) 12 to 25% (w / v), potassium hydroxide (KOH) 12 to 20% (w/v) and sodium carbonate (Na ₂ CO ₃ ) 2 to 5% (w/v) in an aqueous alkali solution and reacted at 90 to 110° C. for 120 to 180 minutes, but the yarn is immersed during the reaction process It provides artificial eyelashes including; artificial hair processed by applying ultrasonic waves to an aqueous alkali solution.

In the artificial eyelashes of the present invention, the yarn preferably has a kaolin content of 1 to 5% (w/w).

In the artificial eyelashes of the present invention, the artificial hair is preferably processed by applying an ultrasonic wave of 20 to 40 KHz to the aqueous alkali solution in which the yarn is immersed.

The artificial eyelashes of the present invention can improve the problems of existing artificial eyelashes, and the color is dark and matte, so it can give a natural aesthetic feeling similar to natural hair, has a good touch feeling similar to natural hair, and expresses a curl design Ease of use is also excellent. In particular, there is an advantage in that the adhesion with the actual eyelashes is improved, so that the durability is excellent, and the operator can more easily operate the artificial eyelashes.

1 is a photograph of the cross-section and surface structure of an existing artificial eyelash (A) and an artificial eyelash (B) of the present invention with an electron microscope.
2 is a view showing a state in which the artificial eyelashes of the present invention are adhered to the bonding target yarn in order to measure the adhesive strength of the artificial eyelashes of the present invention.
3 shows an experimental set used to evaluate the temporal stability of the artificial eyelashes of the present invention.
4 is a view showing the state of immersing the artificial eyelashes of the present invention for 10 minutes in water at 80 ℃ to evaluate the stability over time and then drying.
5 shows an example of measuring the degree of deformation of the tip curl for evaluating the temporal stability of the artificial eyelashes of the present invention.
6 to 8 show the quality evaluation results through the survey of the artificial eyelashes of the present invention.

The artificial eyelashes of the present invention are made of a polybutylene terephthalate base yarn containing kaolin, sodium hydroxide (NaOH) 12 to 25% (w/v), potassium hydroxide (KOH) 12 to 20% ( w/v) and sodium carbonate (Na ₂ CO ₃ ) immersed in an aqueous alkali solution of 2 to 5% (w/v) and reacted at 90 to 110° C. for 120 to 180 minutes. It is characterized in that it includes; artificial hair processed by adding a.

Kaolin (CAS-No. 1332-58-7) is one of the clay minerals and its basic chemical formula is Al ₂ O ₃ ·2SiO ₂ ·2H ₂ O. In the present invention, among the PBT base yarns, a PBT base yarn containing such kaolin is used, and the kaolin contained in the base yarn is desorbed by reaction with an aqueous alkali solution, so that artificial hair having grooves of various sizes can be manufactured. These artificial hair grooves play an important role in the quality of the artificial eyelashes pursued in the present invention, and according to the present invention, the kaolin content of 1 to 5% (w/w) based on the total weight of the yarn can achieve this effect. It is preferable for A typical PBT base yarn that satisfies this is 'Tynex® Natrafil™ 0101' from DuPont. In addition to kaolin, the PBT base yarn used in the present invention may contain a small amount of impurities or additives used during the processing process, but it is preferable that the content of PBT exceeds 90% (w/w) based on the total weight of the yarn. In addition, for the above effect, the particle size of kaolin is preferably 1 to 50㎛.

In the present invention, the aqueous alkali solution used in the processing of artificial hair contains sodium hydroxide (NaOH), potassium hydroxide (KOH) and sodium carbonate (Na ₂ CO ₃ ) 12 to 25% (w/v), 12 to 20% (w/ v), it can be prepared by adding and dissolving in water at a concentration of 2 to 5% (w/v). In general, when processing PBT yarn, a NaOH solution of 40 to 50% (w/v) is used. According to the present invention, when the alkali aqueous solution of the present invention is used as described above, the feel of artificial hair can be greatly improved. Due to the difference in the aqueous alkali solution, subtle differences occur on the surface of the PBT base yarn, and this difference seems to be harmonized with the groove structure generated by the detachment of kaolin from the PBT base yarn to indicate a difference in tactile feel.

The surface of the yarn can be modified by adding and reacting the kaolin-containing PBT base yarn to the aqueous alkali solution as described above. In the present invention, the reaction temperature is set to 90 to 110° C. and the reaction time is set to 120 to 180 minutes. Since the surface of the artificial hair may vary greatly depending on the reaction temperature and reaction time conditions, the above conditions are also important factors for achieving the quality of the artificial eyelashes pursued in the present invention.

Immersion may be performed so that a part of the surface of the yarn is in contact with the aqueous alkali solution, and if necessary, the entire surface of the yarn may be in contact.

In the present invention, ultrasonic waves are applied during the reaction process to induce detachment of the kaolin particles whose adhesion to the yarn is loosened by the reaction with the aqueous alkali solution. At this time, it is preferable to set the frequency of the ultrasonic wave to 20 to 40 KHz.

In addition, it is preferable that the ultrasonic wave is applied 30 minutes after the start of the reaction by immersing the yarn in an aqueous alkali solution. Since kaolin may be desorbed only when ultrasonic waves are applied after decomposition of the yarn constituents to a certain extent by the aqueous alkali solution, unnecessary energy may be wasted if ultrasonic waves are applied too early.

The artificial hair manufactured by the above method shows a structure in which various grooves are formed on the surface. Due to the harmony between the surface structure and the elasticity of the PBT base yarn and the properties of the modified surface, it seems that the quality of the artificial eyelashes pursued in the present invention is exhibited.

The artificial eyelashes of the present invention are available in both a strip form expressed as a strip lash and an extension form expressed as an extension lash in general, and may be provided in any other form to replace the eyelashes. For example, in the case of a strip shape, it may be manufactured by arranging and fixing the artificial hair of the present invention to the strip, and in this case, other artificial hair may be used together with the artificial hair of the present invention. In the case of the extended form, the artificial hair of the present invention may be cut to an appropriate length, and may be manufactured in a form in which several strands are connected.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for illustrating the present invention, and therefore, the scope of the present invention should not be construed as being limited by these examples.

[Example]

1. Manufacture of false eyelashes

1-1. Example sample

Purchase Tynex® Natrafil™ 0101 (diameter about 0.07, 0.10, 0.12 mm) from DuPont, a PBT base yarn containing 1 to 5% (v/v) of kaolin, and cut it to a length of about 35 mm for processing. used as yarn.

Sodium hydroxide (NaOH) 12 to 25% (w/v), potassium hydroxide (KOH) 12 to 20% (w/v) and sodium carbonate (Na ₂ CO ₃ ) 2 to 5% (w/v) aqueous alkali solution Prepared, placed in a processing tank equipped with an ultrasonic device, heated so that the temperature of the aqueous alkali solution was about 100 ° C., and then the yarn was immersed in the aqueous alkali solution, and after about 30 minutes, the reaction solution was reacted for about 120 minutes while applying an ultrasonic wave of 35 KHz. After the reaction, the yarn was washed in lukewarm water at 30° C. and dried at 80° C. for 6 hours to obtain processed artificial hair.

The processed artificial hair was cut to a length of 8 to 13 mm and used as an artificial eyelash (extension type) sample for subsequent experiments.

1-2. comparative sample

A general PBT yarn that does not contain kaolin was purchased and cut to a length of about 35 mm to be used as a yarn for processing.

Typically, according to the method used for tapering of PBT yarn, prepare an aqueous alkali solution of sodium hydroxide (NaOH) 48% (w/v), put it in a processing tank, and heat it so that the temperature of the aqueous alkali solution becomes about 100 ° C. was immersed in an aqueous alkali solution and reacted for about 120 minutes. After the reaction, the yarn was washed and dried to obtain processed artificial hair.

The processed artificial hair was cut to a length of 8 to 13 mm and used as an artificial eyelash (extension type) sample for subsequent experiments.

2. Section and surface analysis

The cross-section and surface structure of the artificial eyelashes of the Examples and Comparative Examples were observed with an electron microscope.

As a result, as shown in FIG. 1 , the artificial eyelashes of Comparative Example showed a nearly perfect circular cross-section and had a smooth surface, but the artificial eyelashes of the Example showed an incomplete circle due to uneven edges, and the surface was also rough.

3. Adhesive strength analysis

In order to investigate whether the artificial eyelashes can be stably adhered to the original eyelashes by the extension type artificial eyelashes procedure, the adhesive strengths of the false eyelash samples of Examples and Comparative Examples were comparatively analyzed.

A circular cross-section yarn (0.10 mm) was used as the object to be adhered (the role of the original eyelashes), and each false eyelash sample was attached with a dedicated glue to overlap about 4 mm, and the adhesive strength was measured (Load Cell: 250 g, Speed: 50 mm/min, Gauge Length: 40 mm) (see FIG. 2).

As a result, as shown in Table 1, it was found that the artificial eyelash samples of Examples had superior adhesive strength compared to Comparative Examples.

comparative example Example Adhesive strength increase rate
(%, B/A) diameter Adhesive strength
(gf, A) diameter Adhesive strength
(gf, B) 0.07mm 46.4 0.07mm 46.5 100.2 0.10mm 68.6 0.10mm 82.9 120.8 0.12mm 81.0 0.12mm 88.9 109.8

4. Evaluation of stability over time

In order to evaluate stability in extreme conditions, the false eyelash samples of Examples and Comparative Examples were immersed in water at 80° C. for 10 minutes to evaluate the presence or absence of curl deformation at the tip.

In order to maintain constant experimental conditions, an experimental set was constructed using a beaker and an Erlenmeyer flask (see FIG. 3).

If the beaker and Erlenmeyer flask are filled with constant water and then the heater is operated, the temperature of the water in the beaker is raised first, and the magnetic bar rotates to convect the water in the beaker to ensure constant heating. The water in the first heated beaker heated the water contained in the Erlenmeyer flask by heat conduction and maintained it at a constant temperature. When the temperature of the water in the Erlenmeyer flask reached 80° C., the sample was put into the Erlenmeyer flask, immersed for 10 minutes, and dried at room temperature (see FIG. 4).

Thereafter, images of artificial eyelashes before and after immersion were extracted from a stereoscopic microscope, the angles formed by the beginning and the end of the images were measured, and then the angles before and after immersion were compared to evaluate the degree of deformation of the tip curl (see FIG. 5 ).

As a result, as shown in Table 2, although the strain rate of the sample of Example increased compared to the sample of Comparative Example, it was found to be sufficiently stable for use as false eyelashes. It is determined that the difference in strain between the samples of Examples and Comparative Examples is also related to the feel of natural hair.

division degree Before immersion (A) After immersion (B) Strain (%) comparative example Diameter 0.10mm 28.5 29.1 2.1 Diameter 0.15mm 32.3 32.6 0.9 Example Diameter 0.07mm 19.7 19.8 0.7 Diameter 0.10mm 19.7 20.2 2.8 Diameter 0.12mm 20.6 21.7 5.4

5. Quality assessment through surveys

Example In order to evaluate the quality of artificial eyelashes, a questionnaire related to quality evaluation was conducted for operators.

A total of 112 professional surgeons (gender: female 99.1%, male 0.9%) (age: 97% in their 20s to 40s, 54% in their 40s) who performed artificial eyelash extensions were targeted, and the evaluation items were as follows.

(1) Is there a natural feeling similar to natural hair compared to existing lash products?

(2) Is the color darker and matte than the existing lash products?

(3) Is the adhesive affinity of the glue higher than that of the existing lash products during the procedure?

(4) Do you feel that the maintenance period is longer than the existing lash after the procedure?

(5) Do you feel the ease of design configuration during the procedure?

(6) Do you feel that the overall quality of the developed product is superior to that of the existing product?

The above evaluation items were evaluated on a 5-point scale (5, strongly agree; 4, agree; 3, average; 2, disagree; 1, strongly disagree).

As a result, as shown in FIGS. 6 to 8 , the artificial eyelashes of Examples were evaluated to be very excellent in all items.

Claims (3)

A polybutylene terephthalate base yarn containing 1 to 5% (w/w) of kaolin is mixed with sodium hydroxide (NaOH) 12 to 25% (w/v), potassium hydroxide (KOH) 12 to 20% (w/v) and sodium carbonate (Na ₂ CO ₃ ) 2 to 5% (w/v) in an aqueous alkali solution and reacted at 90 to 110° C. for 120 to 180 minutes, but during the reaction process, the yarn is immersed Artificial eyelashes comprising a; artificial hair processed by applying ultrasonic waves of 20 to 40 KHz in an aqueous alkali solution.
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