JP2016183424A - Manufacturing method for eyelash extension, eyelash extension, and fitting method for eyelash extension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for an eyelash extension, capable of improving fitting durability.SOLUTION: A manufacturing method for an eyelash extension includes: a first step of mixing silk powder with resin before extruding a mixture of the resin and silk powder from a mold having an aperture for regulating a shape of an artificial eyelash main body; and a next step of cutting the extruded fibrous material into a length of the artificial eyelash main body. Application of the eyelash extension positions the silk powder on a surface of the artificial eyelash main body, making it possible to improve fitting durability of the eyelash extension.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method for manufacturing an eyelash extension, and more particularly, to a method for manufacturing an eyelash extension with improved wearing durability. The invention also relates to an eyelash extension and a method of attaching the eyelash extension.

  False eyelashes are one of the items that give the eyelashes length and volume to create a larger, beautiful and attractive eye. False eyelashes can give a length and volume to the user's eyelashes by putting together a plurality of artificial eyelashes, providing an adhesive part at the end thereof, and attaching the adhesive part to the user's eyelid (for example, Patent Documents 1 and 2). False eyelashes adhere to the user's skin, so the wearing feeling is poor, and in some cases the skin may be rashed.

  On the other hand, in recent years, an artificial eyelash called a so-called eyelash extension in which a volume is approximately the same in shape and length as a single eyelash has been proposed (for example, Patent Document 3). This eyelash extension (artificial eyelash) does not adhere to the eyelids, but directly adheres to the eyelashes using an adhesive, so that the wearing feeling is good and there is little risk of skin irritation. In addition, since the eyelash extensions are bonded one by one to each eyelash, it is possible to give the eyelash length and volume with a natural feel compared to false eyelashes.

JP 2008-231632 A JP 2005-146500 A JP 2010-24579 A Utility Model Registration No. 3168659 Utility Model Registration No. 3170285

  The eyelash extension is not attached directly to the eyelid, so there is less risk of skin irritation compared to false eyelashes. And since false eyelashes attach an adhesive agent directly to the eyelid, they are often removed and disposable. On the other hand, eyelash extensions are often left on the eyelashes because they have less risk of skin irritation and are expensive to attach compared to false eyelashes. Therefore, since the eyelash extension is always attached to the eyelash, it is preferable to improve the attachment durability so as not to be removed from the eyelash as much as possible.

  The present inventor has developed the following eyelash extensions for the purpose of improving the adhesion of the eyelash extension (Patent Document 4, Patent Document 5). These eyelash extensions can be obtained by making the cross section of the artificial eyelash body part into a polygonal shape (Patent Document 4), or making the surface of the artificial eyelash body part an uneven surface (Patent Document 5). I try to get better. However, when producing these special eyelash extensions, it is necessary to use a special manufacturing method dedicated to it.

  The inventor of the present application conducted an experiment to improve the mounting durability of the eyelash extension made of polybutylene terephthalate resin without using the special techniques shown in Patent Documents 4 and 5. In such an experiment, the present inventors succeeded in improving the wearing durability of the eyelash extension by mixing a predetermined material, leading to the present invention.

  This invention is made | formed in view of this point, The main objective is to provide the eyelash extension which can improve mounting | wearing durability.

  The method for producing an eyelash extension according to the present invention includes a step of mixing silk powder with a resin, and a step of extruding the mixture of the resin and the silk powder from a mold having an opening that defines the shape of the artificial eyelash main body. And cutting the extruded fibrous material into the length of the artificial eyelash body.

  In a preferred embodiment, the resin is polybutylene terephthalate, a cross section of the artificial eyelash body has a circular shape, and the silk powder is fibroin powder.

  In a preferred embodiment, the blending ratio (% by mass) of the silk powder is 5% or less.

  In a preferred embodiment, the blending ratio (% by mass) of the silk powder is 1% or less.

  In a preferred embodiment, the method further includes a step of coloring the artificial eyelash body, wherein the artificial eyelash body is black, dark brown, purple, blue, pink, silver, green, light orange, light gold, red. Colored with a color selected from the group consisting of wine red, white and yellow.

  In a preferred embodiment, after the cutting step, a step of immersing a part of the artificial eyelash body in a chemical is performed.

  In a preferred embodiment, after the cutting step, a step of forming a curve in the artificial eyelash body is performed.

  An eyelash extension according to the present invention is an eyelash extension that extends the length of an eyelash, and includes an artificial eyelash main body portion having a tip end portion and a terminal end portion, and the diameter of the end portion of the artificial eyelash main body portion is the tip end portion. It is thicker than the diameter, and the artificial eyelash body part is made of resin, and the artificial eyelash body part contains silk powder.

  In a preferred embodiment, the resin is polybutylene terephthalate, and a cross section of the artificial eyelash body has a circular shape. The silk powder is fibroin powder.

  In a preferred embodiment, the blending ratio (% by mass) of the silk powder is 5% or less.

  In a preferred embodiment, the blending ratio (% by mass) of the silk powder is 1% or less.

  In a preferred embodiment, the artificial eyelash body is selected from the group consisting of black, dark brown, purple, blue, pink, silver, green, light orange, light gold, red, wine red, white and yellow. It is colored with color.

  The attachment method according to the present invention is an attachment method of an eyelash extension. The extension eyelash comprises an artificial eyelash main body having a tip portion and a terminal portion, and fibroin powder contained in the artificial eyelash main body, and the artificial eyelash main body portion is made of polybutylene terephthalate. The cross section of the artificial eyelash main body has a circular shape. The attachment method according to the present invention includes a step of applying an adhesive to the end portion of the artificial eyelash main body, and the adhesive applied to the end portion of the artificial eyelash main body. And attaching to the eyelashes.

  In a preferred embodiment, the blending ratio (% by mass) of the silk powder is 5% or less.

  In a preferred embodiment, the blending ratio (% by mass) of the silk powder is 1% or less.

  In a preferred embodiment, the artificial eyelash body is selected from the group consisting of black, dark brown, purple, blue, pink, silver, green, light orange, light gold, red, wine red, white and yellow. It is colored with a color.

  According to the eyelash extension manufacturing method of the present invention, after mixing silk powder with resin, the mixture of resin and silk powder is extruded from a mold, and the extruded fibrous material is cut. Thereby, an eyelash extension with improved mounting durability can be manufactured without using a special manufacturing method.

  And, according to the eyelash extension according to the present invention, since the artificial eyelash body portion contains silk powder, the surface of the artificial eyelash body portion can be smoothened by placing the silk powder on the surface of the artificial eyelash body portion. Becomes rough. As a result, when an adhesive is applied to the surface of the artificial eyelash main body, an anchor effect due to the rough surface is generated, so that the durability of attaching the eyelash extension can be improved.

It is a figure which shows a mode that the eyelash extension 100 which concerns on embodiment of this invention was attached. It is a perspective view which shows the structure of the eyelash extension 100 which concerns on embodiment of this invention. It is sectional drawing of the eyelash extension 100 along the AA line in FIG. It is sectional drawing of the eyelash extension 100 in the B section in FIG. It is a flowchart for demonstrating the manufacturing method of the eyelash extension 100 which concerns on embodiment of this invention. (A) to (c) is a diagram for explaining a method of attaching the eyelash extension 100 to the eyelash 50. It is a figure which shows the state which attached the eyelash extension 100 to the upper eyelash. It is a perspective view which shows the structure of the eyelash extension 110. FIG. It is sectional drawing of the eyelash extension 110 along the AA line in FIG. It is sectional drawing of a part of eyelash extension 110 along the arrow 65 in FIG. It is a perspective view which shows the structure of the eyelash extension 120. FIG. It is sectional drawing of the eyelash extension 110 along the AA line in FIG. It is sectional drawing of the eyelash extension 100 in the B section in FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following drawings, components having substantially the same function are denoted by the same reference numerals for the sake of brevity. Further, matters necessary for the implementation of the present invention other than matters specifically mentioned in the present specification can be grasped as design matters of those skilled in the art based on the prior art in this field. The present invention can be carried out based on the contents disclosed in the present specification and drawings and the common general technical knowledge in the field. In addition, the present invention is not limited to the following embodiments.

  An eyelash extension 100 according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram illustrating a state in which the eyelash extension 100 according to the present embodiment is attached to an eyelash 50 of a user (wearer) 55.

  The eyelash extension 100 of this embodiment is an artificial eyelash that extends the length of the eyelash 50 of the user 55. In the present embodiment, the eyelash extension may be referred to as an “extension”.

  The extension 100 of the present embodiment includes an artificial eyelash body 10 and silk powder contained in the artificial eyelash body 10. The artificial eyelash body portion 10 has an eyelash shape, and the artificial eyelash body portion 10 is formed with a curve (curvature) that forms a natural angle when attached to the eyelash 50. Specifically, the diameter (here, the diameter) of the distal end portion 15 of the artificial eyelash body 10 is larger than the diameter (diameter) of the distal end portion 11. The artificial eyelash main body 10 is slightly curved, and the top of the tip 11 is sharp. The length of the artificial eyelash body 10 of the present embodiment is, for example, 5 mm to 20 mm, and the diameter (or thickness) of the end surface 15a of the end portion 15 is, for example, 0.07 mm to 0.3 mm.

  In the extension 100 of this embodiment, an adhesive (glue) 20 is attached to the end portion 15. Then, the extension 100 is bonded and fixed to the eyelash 50 by the adhesive 20.

  FIG. 2 is a perspective view showing the configuration of the extension 100 of the present embodiment. FIG. 3 shows a cross-sectional view along the line AA in FIG. FIG. 4 shows a cross-sectional view of a portion B in FIG.

  In the configuration of the present embodiment, the artificial eyelash body 10 is made of the resin 12, and the silk powder 30 is dispersed in the resin 12. In addition, the description of the silk powder 30 in FIG.3 and FIG.4 is a typical thing for description. 3 and 4, the diameter φ at the end portion 15 is shown.

  The resin constituting the artificial eyelash body 10 of this embodiment is made of, for example, polybutylene terephthalate, polyester, acrylic, vinyl chloride, or nylon. The artificial eyelash body 10 in this example is made of polybutylene terephthalate (PBT). In addition, the artificial eyelash main-body part 10 may be comprised from the colored material other than black. The artificial eyelash body 10 can be made into, for example, dark brown, purple, blue, pink, silver, green, light orange, light gold, red, wine red, white, yellow, etc. Can be realized.

  Silk powder 30 is blended in the artificial eyelash body 10 of the present embodiment. The silk powder 30 is obtained by making silk into a powder form, that is, silk processed into a powder form. The silk powder 30 has a particle size (average particle size) of, for example, about 30 μm or less, and preferably has a particle size of 20 μm or less (or 10 μm or less) and has a uniform particle size as much as possible ( Good particle size distribution). In addition, as the silk powder 30 of the present embodiment, it is possible to use an ultrafine silk powder having an average particle size of about 5 micrometers (5 μm) or less. Silk is composed of two proteins, sericin (20-30%) and fibroin (70-80%). The silk powder 30 according to the present embodiment is obtained by removing sericin that easily adheres to impurities and converting the core portion of the Fabroin into a powder (Fibroin powder). The silk powder 30 is preferably a fibroin powder in which impurities are excluded, but may be a silk powder containing sericin.

  In addition, if the silk powder 30 is silk processed into a powder form, the particle size (average particle size or particle size distribution) may not be strictly limited (the particle size may exceed 30 μm). The point is that the silk powder 30 is dispersed and blended in the artificial eyelash body 10. It is preferable that the silk powder 30 is uniformly dispersed throughout the artificial eyelash body 10, but the uniform dispersion is not necessarily required, and the silk powder 30 is appropriately positioned on the surface 10 a of the artificial eyelash body 10. The point is that That is, it is not required that the silk powder 30 is evenly blended into the central portion (core portion) of the artificial eyelash body 10. In addition, although silk does not completely dissolve in the state of silkworm, if the particle size of the silk powder 30 of the present embodiment is reduced, the water-soluble ability is increased and the water-soluble characteristics are substantially imparted. Can do.

  The silk powder 30 of this embodiment is blended so as to be dispersed throughout the resin 12 (here, polybutylene terephthalate). Silk powder 30 is located on the surface 10a of the artificial eyelash body 10, and the state of the silk powder 30 changes from that of the surface 10a when the artificial eyelash body 10 is formed of only the resin 12. ing. Specifically, the surface 10a when the artificial eyelash main body 10 is formed of only the resin 12 is a hydrophobic smooth surface. On the other hand, the surface 10a of the artificial eyelash body 10 containing the silk powder 30 of the present embodiment is rough as compared with the smooth surface, and a hydrophilic element is added thereto.

  In the configuration of the present embodiment, the blending ratio (% by mass) of the silk powder 30 in the artificial eyelash body 10 is 10% or less, and 5% or less in consideration of practicality in actual products. If the blending ratio of the silk powder 30 is too large, the physical properties of the mixture (the material in which the resin 12 and the silk powder 30 are mixed) constituting the artificial eyelash body 10 will change as compared with the resin 12 alone, There is a possibility that a curve (curvature) of the eyelash extension 100 cannot be produced or a predetermined softness cannot be produced. The blending ratio (mass%) of the silk powder 30 of an example of this embodiment is 2% or less, or about 1% or 1% or less (preferably about 1% or 1%, for example, 1% ± 0.00. 3%). If the artificial eyelash body 10 can be curved (curved) and satisfy other conditions (softness, etc.), the blending ratio of the silk powder 30 is 10% or less (or 5% or less, 3% or less). However, the present invention is not limited to this and may be suitably used. In the present embodiment, the mass of the silk powder 30 relative to the total mass of the artificial eyelash body 10 is expressed as a blending ratio. If it is more convenient to determine the blending ratio, the ratio of the mass of the silk powder 30 (for example, 10 parts by weight or less) may be substituted with the resin 12 as 100 parts by mass.

  The cross section of the artificial eyelash body 10 of this embodiment has a circular shape as shown in FIG. The “circular shape” in the configuration of the present embodiment is not limited to a circular shape (perfect circle) in a geometric sense, and may be somewhat distorted. For example, when viewed from a perfect circle, an oval shape, an oval shape, or the like may be used. In the example of this embodiment, the cross section of the artificial eyelash body 10 is not formed with irregularities such as grooves and peaks / valleys, and the cross section of the artificial eyelash body 10 has a shape with a smooth curve (substantially) Circular).

  Next, a method for manufacturing the extension 100 of this embodiment will be described with reference to FIG. FIG. 5 is a flowchart for explaining the manufacturing method of the present embodiment.

  First, the silk powder 30 is mixed with the resin (PBT) 12 (step S10). Here, fibroin powder is used as the silk powder 30 of the present embodiment. In the present embodiment, the silk powder 30 is kneaded with the resin 12 so that the silk powder 30 is uniformly dispersed throughout the resin 12. When putting the silk powder 30 in the resin 12, the silk powder 30 may be put in a powder form, or a solution containing the silk powder 30 (for example, an aqueous fibroin solution) may be put in the resin 12. . In the present embodiment, fibroin powder (or fibroin powder aqueous solution) is put in resin (PBT) 12 and the mixture is kneaded to produce a mixture constituting the artificial eyelash body 10.

  Next, the mixture containing the resin 12 and the silk powder 30 is extruded from the mold (step 20). An opening that defines the shape (cross-sectional shape) of the artificial eyelash body 10 is formed in the mold. In the present embodiment, a mold that defines an opening having a circular shape as shown in FIG. 3 is used. When the resin mixture to which the silk powder 30 has been distributed is extruded from the mold, a fibrous material having the cross-sectional shape shown in FIG. 3 is obtained. As described above, the circular shape of the present embodiment is not limited to a geometric circular shape (perfect circle), but may be a substantially circular shape. Further, the opening of the mold is not limited to a substantially circular shape close to a circular shape, and may have a large flatness (for example, a horizontally wide oval or an ellipse).

  Next, the extruded fibrous material is cut into the length of the artificial eyelash body 10 (step S30). That is, it is cut into the length of the extension 100. When cutting, a fibrous material having a predetermined length may be cut with a cutter. Thereafter, the tip of the artificial eyelash body 10 that has been cut to a predetermined length (the length of the extension 100) is attached to a chemical to form the tip 11 of the artificial eyelash body 10. That is, by attaching a part (tip) of the artificial eyelash body 10 to a chemical that dissolves the resin 12, a part of the resin 12 is dissolved and the diameter of the artificial eyelash body 10 is reduced to form the tip 11. To do.

  Thereafter, the extension 100 is obtained by forming a curve in the artificial eyelash body 10. In order to form a curve in the artificial eyelash body 10, the artificial eyelash body 10 is heated, the artificial eyelash body 10 is bent, and the shape is memorized (fixed). In this way, the extension 100 of the present embodiment, that is, the extension 100 including the silk powder 30 is obtained. In addition, when the cutting position and the curve position of the artificial eyelash body 10 can be specified in advance, a curve is formed at the stage of the fibrous material, then cut to a predetermined length, and then the tip 11 The extension 100 may be manufactured by forming

  When coloring the extension 100 of the present embodiment, the pigment can be added to the resin in the step of mixing the silk powder 30 with the resin 12 (step S10). The color (or dyeing) of the resin 12 can be black, for example, dark brown, purple, blue, pink, silver, green, light orange, light gold, red, wine red, white, yellow, etc. Can be. The silk powder 30 and the pigment (colorant) may be mixed with the resin 12 at the same time, or the pigment may be mixed with the resin 12 after the silk powder 30 is introduced. Further, the silk powder 30 may be mixed with the resin 12 after the pigment is introduced.

  Next, a method of attaching the extension 100 of the present embodiment to the eyelash 50 will be described with reference to FIGS.

  First, as shown in FIG. 6A, a part of the extension 100 containing the silk powder 30 is grasped with tweezers 60, and the extension 100 is placed near the eyelash 50 in a state where the adhesive 20 is applied to the end portion 15. Take it to.

  Next, as shown in FIG. 6B, the adhesive 100 of the extension 100 is attached to the eyelash 50 so that the extension 100 is in close contact with the eyelash 50. When the adhesive 20 is cured and the extension 100 is fixed to the eyelash 50, the tweezers 70 are removed as shown in FIG. 6C, and the attachment of the extension 100 is completed. This operation is performed for each eyelash 50.

  FIG. 7 shows a state in which the extension 100 is attached to each of the upper eyelashes 50. As shown in FIG. 7, many extensions 100 are attached to the upper eyelash 50. In this state, it is preferable for the user (user) 55 that the extension 100 is attached to the eyelash 50 for as long as possible.

<Example>
The inventor of the present application conducted a mounting durability test for 100 extensions in the state shown in FIG. This wearing durability test preferably reflects the result of actual wearing on a person. Therefore, instead of a mechanical test or a doll test, the test was performed by actually bonding 100 extensions to a person's eyelashes and observing the bonding state with the right eye and the left eye. The results are shown in Table 1 below.

  “Comparative example” in Table 1 is an extension made of polybutylene terephthalate (PBT). The “Example” is an extension 100 in which silk powder is kneaded with PBT resin at 1% (mass%). The silk powder of the example uses fibroin powder. In the wearing durability test, the cleansing operation using hot water was repeatedly performed, and the wearing durability was evaluated by counting the number of extensions remaining for each cleansing operation.

  When the number of cleansings was 10, 92 remained in the comparative example and 97 in the example. At this number of times, there was not much difference between the two, but after that, the comparative example is getting more and more extensions.

  When the number of cleansings was 20, 84 remained in the comparative example, but when compared with 10 times, 8 more (8% on the basis of 100) were further removed. In the example, the number is 97, which is the same number as 10 times, and one is not taken (0% based on 100). Then, when comparing 40 times, 72 remained in the comparative example, but 91 remained in the example. Comparing the numbers obtained from one time (100), the comparative example has 28 (28%), and the embodiment has only 9 (9%). That is, the example is about 3 times more difficult to remove.

  When comparing 60 times, 54 remained in the comparative example, but 88 remained in the example. Comparing the numbers obtained from one time (100), 46 (46%) were obtained in the comparative example, and only 12 (12%) were obtained in the example. That is, the embodiment is about 4 times more difficult to remove. Note that when the extension is almost halved as in the comparative example, the extension is reattached, and this is not simply the number or ratio of the extension but the difference in the life of the extension.

  Furthermore, although there are 88 examples at 60 times, this remains more than 84 of the comparative example at 20 times. Therefore, when compared by the number of cleansings, it can be said that the embodiment has a wearing durability of three times or more than the comparative example.

Next, the adhesive tensile strength test of each of the comparative example and the example was performed. The results are shown in Table 2 below. The bond tensile strength test is performed using a mechanical test, and is the tensile strength (tensile shear bond strength) after the extension is bonded to the eyelashes and left for 24 hours. The strength is expressed in MPa (megapascal). ing.

  As shown in Table 2, the strength of the comparative example (PBT) was 1.9 MPa, while the strength of the example (extension 100) was 5.8 MPa. That is, it was found that the strength of the extension 100 of the example was three times stronger than that of the comparative example (PBT).

  From the results of the above examples, it was found that the extension 100 containing silk powder was superior to the comparative example (PBT) in mounting durability and had high adhesive tensile strength. Next, the inventor's guess about why such a result has been obtained will be described below.

  First of all, although there is an eyelash extension with the word “silk” attached, it is for the image of smoothness like “silk” and actually contains silk (silk). Is not sold to the inventor's knowledge. Under such circumstances, the applicant of the present application, as a leading company in the eyelash extension industry, is based on the belief that as long as the word `` silk '' is used, it should actually be developed by blending silk powder into the eyelash extension. The extension 100 of this embodiment was developed. When the characteristics of the extension 100 were examined, it was found that, as described above, the mounting durability was excellent and the adhesive tensile strength was high.

  Since there has been no example of blending silk powder in the eyelash extension in the past, the extension 100 of this embodiment is excellent in wearing durability, and the adhesive tensile strength is only a result, the reason is speculation However, it seems to be as follows.

  The extension of the comparative example (manufactured by PBT) has a smooth extension surface. On the other hand, since the extension 100 of this embodiment is blended with the silk powder 30, fine irregularities can be formed on the surface of the extension. This fine unevenness functions as the anchor effect (throwing effect) of the adhesive 20 and is considered to have improved the adhesive force. Further, since PBT is a material that hardly contains moisture, moisture does not adhere to the surface of the extension of the comparative example. On the other hand, since silk powder has the property of easily containing a lot of moisture, the surface of the extension 100 of this embodiment contains moisture. From this, it is considered that the moisture contained in the extension 100 improves the curing rate of the adhesive and increases the adhesive strength.

  As described above, according to the extension 100 according to the present embodiment, since the artificial eyelash body 10 includes the silk powder 30, the silk powder 30 is positioned on the surface 10 a of the artificial eyelash body 10, so The smooth surface of the surface 10a of the eyelash body 10 (that is, the surface in the case of an extension of only PBT) can be made rough. As a result, when the adhesive 20 is applied to the surface 10a of the artificial eyelash body 10, the anchor effect of the rough surface (10a) is generated, thereby improving the wearing durability of the eyelash extension. The rough surface (10a) increases the surface area of the surface 10a of the extension 100, which also improves the adhesive strength of the extension 100 and, as a result, improves the mounting durability of the extension.

  In addition, according to the method for manufacturing an extension of the present embodiment, after the silk powder 30 is mixed with the resin, the mixture of the resin 12 and the silk powder 30 is extruded from a mold, and the extruded fibrous material is cut. Thus, the extension 100 with improved mounting durability can be manufactured without using a special manufacturing method.

  Further, the extension 100 according to the present embodiment is important for the extension that the silk powder 30 is contained in the resin 12 (artificial eyelash body 10), so that the extension 100 becomes soft, glossy, and texture is improved. Aesthetic features are also demonstrated.

  In the said Example, although the compounding quantity (mixing ratio) of the silk powder 30 is 1% (mass%), the following effects may be acquired by changing (increasing) a mixing ratio. . First, the adhesive strength can be further improved by increasing the blending ratio (blending ratio exceeding 1%). In addition, the bonding speed can be further improved. Further, by changing (increasing) the blending amount of the silk powder 30, the gloss of the extension 100 may increase at an appropriate blending amount.

  On the other hand, the following drawbacks may occur by changing (increasing) the blending ratio. First, the dyeing (coloring) of the extension 100 may be affected. Further, the possibility that the shape memory rate of the extension 100 is lowered is increased. This is because the silk powder 30 contains a lot of moisture. Furthermore, there is a high possibility of discoloration depending on the temperature at which the extension 100 (artificial eyelash body 10) is curled. In addition, the expansion rate of the extension 100 increases, and the sustainability may decrease.

  Considering the above, it is preferable that the blending amount (blending ratio) of the silk powder 30 in the extension 100 does not exceed 5%. That is, the blending amount of the silk powder 30 is preferably 5% or less. In addition, even if the blending amount (blending ratio) of the silk powder 30 is 1%, there is a sufficient effect as compared with the comparative example. There may be.

  The extension 100 shown in FIG. 3 has a circular cross section, but the present invention is not limited to this, and the cross section of the extension 100 can be modified into a polyhedron (hexagon, octagon, etc.). It is also possible to make the cross section into a star shape (hexagonal star shape, octagonal star shape). Specifically, as shown in FIGS. 8 to 10, a polygonal star-shaped extension 110 having a groove 34 can be formed.

  FIG. 8 is a perspective view showing the configuration of the extension 110 of the present embodiment. FIG. 9 shows a cross-sectional view along the line AA in FIG. FIG. 10 shows an enlarged side view of a portion B in FIG.

  In the extension 110 of the present embodiment, the silk powder 30 is dispersed in the artificial eyelash body 10. A groove 34 extends along the extending direction 65 of the artificial eyelash body 10. Further, as shown in FIG. 9, the cross section of the artificial eyelash body 10 has a regular octagonal structure, and a groove 34 is formed between the apexes 32. More specifically, the vertex 32 of the cross section of the artificial eyelash body 10 is located at the vertex of a regular octagon. Therefore, the vertex 32 is formed every 45 °. If it demonstrates in the part between 0 degrees and 90 degrees, the vertex 32 is located in the position of 0 degrees, 45 degrees, and 90 degrees, and the groove | channel 34 is provided between the vertex of 0 degrees and 45 degrees, A groove 34 is also provided between the apexes of 45 ° and 90 °. The star shape of the cross section may be a hexagon, a pentagon, a quadrangle, or a triangle.

  The depth T of the groove 34 formed in the artificial eyelash body 10 can be, for example, 20 to 40 (typically 30) when the thickness is 100. In the configuration of the present embodiment, the groove 34 is formed from the end surface 15 a of the root portion 15 to the tip portion 11. However, the groove 34 does not necessarily have to be formed to the tip of the distal end portion 11, and may be formed at least at the root portion 15. This is because, depending on the manufacturing method of the extension 110, the groove 34 may disappear at the tip portion 11 whose diameter decreases.

  In the extension 110 of the present embodiment, for example, the groove 34 can be extended from the root portion 15 to an intermediate point located between the end surface 15a of the root portion 15 and the tip end portion 11. Depending on the manufacturing method of the extension 110, a part of the artificial eyelash body 10 may melt and the groove 34 may disappear at the position of the end face 15a of the root portion 15. Therefore, even if the groove 34 is formed in the portion of the root portion 15, the groove 34 may not be formed in the location of the end surface 15 a of the root portion 15.

  In the extension 110 of the present embodiment, the silk powder 30 is dispersed in the artificial eyelash body 10. In addition, the cross section of the root portion of the artificial eyelash body 10 has a polygonal shape in which the grooves 34 are located between the apexes 32. Therefore, it becomes easy to hold the adhesive 20 by the polygonal grooves 34 of the artificial eyelash body 10, and the adhesiveness between the user's eyelash 50 and the artificial eyelash body 10 can be improved. That is, in addition to the effects of the extension 100 described above, the adhesion can be further improved.

  In addition, since the groove 34 is located between the apexes 32 of the polygonal cross section, the artificial eyelash body 10 can be attached using the groove 34 holding the adhesive not only in one direction but also from the other direction. The eyelash 50 can be adhered. Furthermore, since a plurality of grooves 34 are formed in the artificial eyelash body 10, the weight (mass) of the extension 110 can be reduced as compared with a case where the grooves 34 are not formed. Even if the weight of each extension 110 is light, they can be attached to the user's eyelashes. Therefore, reducing the weight of the extension 110 affects the user's (user) feeling of use. As a result, it is possible to realize the extension 110 having a comfortable feeling. In the extension 110 of the present embodiment, although depending on the thickness of the artificial eyelash body 10 and the depth T of the groove 34, the weight of the extension is, for example, 10% to 70% as compared with the case without the plurality of grooves 34. % Can be reduced.

  Next, in the extension 100 illustrated in FIG. 3, the surface 10 a of the artificial eyelash body 10 is not formed with the uneven portion or the rough portion. It is also possible to modify it to have a rough portion. Specifically, as shown in FIGS. 11 to 13, an extension 120 having a rough surface portion 40 can be obtained.

  FIG. 11 is a perspective view showing the configuration of the extension 120 of the present embodiment. FIG. 12 shows a cross-sectional view along the line AA in FIG. FIG. 13 shows an enlarged side view of portion B in FIG.

  In the extension 120 of this embodiment, the silk powder 30 is dispersed in the artificial eyelash body 10. In addition, a rough surface portion 40 is formed closer to the end surface 15a side of the root portion 15 than an intermediate point in the longitudinal direction of the artificial eyelash main body portion 10. In particular, the rough surface portion 40 only needs to be formed in a region in contact with the eyelashes 50, and can be selectively formed only in a portion where the adhesive 20 is applied.

  The rough surface portion 40 of the present embodiment includes a plurality of granular irregularities 41. The rough surface portion 40 composed of the granular irregularities 41 is formed over the entire circumference of the root portion 15. Accordingly, the rough surface portion 40 is formed in all directions of the surface of the root portion 15, and the adhesive 20 is applied to the rough surface portion 40 regardless of the direction from which the adhesive 20 is applied. be able to.

  In the configuration of the present embodiment, the rough surface portion 40 of the artificial eyelash body portion 10 is formed by frosting. In other words, the artificial eyelash main body 10 is formed with irregularities 41 generated by frosting. Frost processing refers to processing that makes the surface gritty like frost (or processing that is gritty like frosted glass). In this embodiment, the irregularities 41 are formed on the artificial eyelash body 10 by sandblasting. . Sand blasting is a processing method in which an abrasive such as sand is sprayed on the surface. For example, the rough surface portion 40 can be formed on the root portion 15 by spraying the root portion 15 of the artificial eyelash main body portion 10 with the abrasive mixed with the compressed air by the compressor and spraying it. The sand (abrasive) used for sandblasting is not limited to so-called sand, and an abrasive suitable for forming the irregularities 41 on the artificial eyelash body 10 can be used.

  The depth (difference in height from the convex portion to the concave portion) of the unevenness 41 of the present embodiment is, for example, about 0.01 mm to 0.1 mm, but is not limited thereto. Specifically, it is determined by the conditions of the frost processing (for example, sandblasting) used to form the rough surface portion 40, and it is possible to appropriately form the irregularities 41 according to the frost processing to be used. It is.

  In addition, it is also possible to form a rough surface portion 40 by forming a through hole in the artificial eyelash body 10 and using the through hole. In that case, the length of the through-holes constituting the irregularities 41 corresponds to the diameter φ of the artificial eyelash body 10. Further, when the through hole is formed, there is an advantage that the weight (mass) of the extension 250 can be reduced. Even if the weight of each extension 250 is light, they can be attached to the user's eyelashes, so reducing the weight of the extension will affect the user's (wearer's) feel. As a result, it is possible to realize an extension that feels comfortable to wear.

  The rough surface portion 40 of the present embodiment can be formed by rubbing a file (specifically, a paper file). A paper file is a tool in which an abrasive is applied to a paper-like sheet used for polishing. When the rough surface portion 40 is formed by a paper file, the shape and depth of the unevenness 41 of the rough surface portion 40 can be adjusted according to the roughness (count) of the paper file to be used.

  When the rough surface portion 40 is formed on the root portion 15 of the artificial eyelash main body portion 10, a large number of artificial eyelash main body portions 10 are aligned, and then sandblast is applied to the root portion 15, so that the rough surface portion 40 is roughened in a single process. A number of artificial eyelash body portions 10 having the surface portion 40 can be formed. In addition, it is possible to form a large number of artificial eyelash body parts 10 having a rough surface part 40 in a single process by applying a paper file to the root part 15 in a state where a large number of artificial eyelash body parts 10 are arranged. It is. Of course, the rough surface portion 40 may be formed by applying a paper file to one artificial eyelash body portion 10.

  In the extension 120 of the present embodiment, since the root portion 15 of the artificial eyelash body 10 has a rough surface portion 40, the rough surface portion 40 makes it easy to hold the adhesive 20 for use. The adhesion between the person's eyelashes 50 and the artificial eyelash body 10 can be improved. That is, in addition to the effects of the extension 100 described above, the adhesion can be further improved. More specifically, in the case of the extension 250 of the present embodiment, the rough surface portion 40 increases the surface area compared to the smooth surface (or due to the unevenness 31), so that the adhesive 20 can be held well. Therefore, the adhesive 20 is preferably attached. In addition, since the silk powder 30 is located on the surface portion 40, the adhesive force or the mounting durability is further enhanced.

  Note that the extensions 110 and 120 shown in FIGS. 8 to 11 have an advantage that the adhesive force is further increased as compared with the extension 100 shown in FIG. 2, but a dedicated manufacturing process for making the extensions 110 and 120. The technical significance of the extension 100 shown in FIG. 2 is great in that it is possible to exhibit the mounting sustainability after adopting an uncomplicated manufacturing process without adopting.

  As mentioned above, although this invention was demonstrated by suitable embodiment, such description is not a limitation matter and of course various modifications are possible. For example, in the example shown in FIG. 7, the extension 100 is attached to the upper eyelash 50, but the extension 100 may be attached to the lower eyelash. Further, the features of the extensions 110 and 120 shown in FIGS. 8 and 11 may be added to the structure of the extension 100 shown in FIG. That is, the shape of the artificial eyelash main body 10 in which the silk powder 30 is blended may be a star shape, and the surface 40 may be rough.

  In addition, although the technical idea of the present invention is greatly different, in Japanese Patent No. 4847610, “Extension 102 may be made from an horny substance derived from an animal such as eyelashes, but hair, fur, Feathers, wool, and silk may be used as well. ", And the use of" silk "is described. However, “silk” here is only a natural-derived material (bird hair, animal hair, plant material, etc.) as an example of the material of the eyelash extension body, and the publication discloses the silk powder. Otherwise, it is not disclosed that silk powder is contained in the resin. The publication also states that "the extension 102 may be made of a composite material, thereby providing an opportunity to give the extension 102 unique properties utilizing a core / shell or layered cross-sectional design." However, this also merely suggests that the extension of the publication may be a “core / shell or layered cross section”, and therefore, the structure of the embodiment of the present invention is “Silk”. It does not suggest that the resin contains powder. Therefore, the extension of the publication and the extension 100 according to the embodiment of the present invention are different in basic structure or idea, and are also significantly different from the technical idea of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the eyelash extension which can improve mounting | wearing durability, and its manufacturing method can be provided.

DESCRIPTION OF SYMBOLS 10 Main body part 11 Tip part 12 Resin 15 Terminal part 20 Adhesive 30 Silk powder 55 User 70 Tweezers 100 Extension (eyelash extension)
110, 120 extension

Silk powder 30 is blended in the artificial eyelash body 10 of the present embodiment. The silk powder 30 is obtained by making silk into a powder form, that is, silk processed into a powder form. The silk powder 30 has a particle size (average particle size) of, for example, about 30 μm or less, and preferably has a particle size of 20 μm or less (or 10 μm or less) and has a uniform particle size as much as possible ( Good particle size distribution). In addition, as the silk powder 30 of the present embodiment, it is possible to use an ultrafine silk powder having an average particle size of about 5 micrometers (5 μm) or less. Silk is composed of two proteins, sericin (20-30%) and fibroin (70-80%). Silk powder 30 of the present embodiment, by removing sericin impurities are likely to adhere, is obtained by the full I broins portion of wick powder (fibroin powder). The silk powder 30 is preferably a fibroin powder in which impurities are excluded, but may be a silk powder containing sericin.

Claims (16)

A method for manufacturing eyelash extensions,
Mixing silk powder with resin;
Extruding a mixture of the resin and the silk powder from a mold having an opening that defines the shape of the artificial eyelash body, and
Cutting the extruded fibrous material into a length of an artificial eyelash main body, and a method for manufacturing an eyelash extension. The resin is polybutylene terephthalate,
The cross section of the artificial eyelash main body has a circular shape,
The method for manufacturing an eyelash extension according to claim 1, wherein the silk powder is fibroin powder.   The method for producing an eyelash extension according to claim 1 or 2, wherein a blending ratio (% by mass) of the silk powder is 5% or less.   The method for manufacturing an eyelash extension according to claim 3, wherein a blending ratio (% by mass) of the silk powder is 1% or less. Further, the method includes a step of coloring the artificial eyelash body part,
The artificial eyelash body is colored with a color selected from the group consisting of black, dark brown, purple, blue, pink, silver, green, light orange, light gold, red, wine red, white and yellow. Item 5. The method for manufacturing an eyelash extension according to any one of Items 1 to 4.   The method for manufacturing an eyelash extension according to claim 1, wherein a step of immersing a part of the artificial eyelash main body in a chemical is performed after the cutting step.   The manufacturing method of the eyelash extension of Claim 1 which performs the process of forming a curve in the said artificial eyelash main-body part after the said process to cut | disconnect. An eyelash extension that extends the length of the eyelashes,
An artificial eyelash body having a tip and a terminal,
The diameter of the end of the artificial eyelash body is larger than the diameter of the tip,
The artificial eyelash body part is made of resin,
The artificial eyelash main body includes an eyelash extension containing silk powder. The resin is polybutylene terephthalate,
The cross section of the artificial eyelash main body has a circular shape,
The eyelash extension according to claim 8, wherein the silk powder is a fibroin powder.   The eyelash extension according to claim 8 or 9, wherein a blending ratio (% by mass) of the silk powder is 5% or less. The eyelash extension according to claim 10, wherein a blending ratio (% by mass) of the silk powder is 1% or less.
  The artificial eyelash body is colored with a color selected from the group consisting of black, dark brown, purple, blue, pink, silver, green, light orange, light gold, red, wine red, white and yellow, The eyelash extension according to any one of claims 8 to 11. A method of attaching eyelash extensions,
The eyelash extension is
An artificial eyelash body having a tip and a terminal, and
Fibroin powder contained in the artificial eyelash body part,
The artificial eyelash body is made of polybutylene terephthalate,
The cross section of the artificial eyelash main body has a circular shape,
Applying an adhesive to the end of the artificial eyelash body,
Attaching the adhesive to the eyelash in a state where the adhesive is applied to the end portion of the artificial eyelash main body, and attaching the eyelash extension.   The method for attaching an eyelash extension according to claim 13, wherein a blending ratio (% by mass) of the silk powder is 5% or less.   The method for attaching an eyelash extension according to claim 14, wherein a blending ratio (% by mass) of the silk powder is 1% or less.   The artificial eyelash body is colored with a color selected from the group consisting of black, dark brown, purple, blue, pink, silver, green, light orange, light gold, red, wine red, white and yellow, The attachment method of the eyelash extension as described in any one of Claim 13 to 15.

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