Manufacturing method of barrette and barrette

Abstract

To provide a manufacturing method of a barrette including an anti-slip member having high adhesive strength to a clamping piece, facilitating attachment, and yet, capable of reducing odor during a manufacturing process of the barrette and odor of the barrette manufactured by the manufacturing process.SOLUTION: A manufacturing method of a barrette including a pair of clamping pieces consisting of an outer clamping piece for clamping hair and an inner clamping piece connected to one end of the outer clamping piece, and a cylindrical silicone anti-slip member inserted through the inner clamping piece, the manufacturing method of the barrette includes: an immersion step of immersing the anti-slip member in a mixed solution denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons; an insertion step of inserting the inner clamping piece into the anti-slip member expanded by immersing it into the solution; and an attachment step of drying the inserted anti-slip member and attaching the anti-slip member dried to the inner clamping piece.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a hair clip having an anti-slip feature, and to the hair clip itself. [Background technology]

[0002] In conventional hair clips, a tubular anti-slip member with high frictional resistance is inserted directly onto a clamping piece made of metal or synthetic resin, or, in order to make it easy to attach the anti-slip member and difficult to peel off, a heat-shrinkable tube made mainly of polyolefin is inserted into the clamping piece and heat-shrunk to attach it to the clamping piece. A manufacturing method has been known to increase the adhesion of such a tubular anti-slip member to the clamping piece and to make it easier to attach it.

[0003] For example, Patent Document 1 filed by the applicant discloses a method for manufacturing a hair clip that includes an outer clamping piece that clamps hair and an inner clamping piece connected to one end of the outer clamping piece, and that includes an anti-slip member on at least the inner clamping piece of a pair of clamping pieces, the method including an immersion step of immersing a silicone tube that serves as the anti-slip member in a solution of absolute ethanol and benzine, an insertion step of inserting the silicone tube that has been immersed in the solution and expanded, and a fitting step of drying the inserted silicone tube and attaching it to the inner clamping piece. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-68530 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the method for manufacturing hair clips in Patent Document 1, the mixed solution into which the anti-slip member is immersed is a solution consisting of absolute ethanol and benzine, which has a pungent odor that stings the nose, making it difficult to work for long periods of time in the immersion process, and there are problems with the odor remaining even after the application process in which the member is dried and applied.

[0006] In view of these problems, the present invention aims to provide a method for manufacturing a hair clip that has a high adhesion of an anti-slip member to the clamping piece and can be easily attached, while also reducing odors in the manufacturing process for the hair clip and in the hair clip manufactured by said manufacturing process. [Means for solving the problem]

[0007] [1] That is, the present invention relates to a method for manufacturing a hair clip having a pair of clamping pieces, each of which is an outer clamping piece that clamps hair and an inner clamping piece that is connected to one end of the outer clamping piece, and a tubular silicone anti-slip member that is inserted through the inner clamping piece, the method comprising the steps of: an immersion step of immersing the anti-slip member in a mixed solution of denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons; an insertion step of inserting the inner clamping piece into the anti-slip member that has been expanded by immersing it in the solution; and an attachment step of drying the inserted anti-slip member and attaching it to the inner clamping piece.

[0008] [2] The method for producing the hair clip according to [1] above, wherein the denatured ethanol further contains 2-propanol.

[0009] [3] The method for producing a hair clip according to [1] or [2] above, wherein the naphthenic hydrocarbon is at least one of cyclohexane and methylcyclohexane.

[0010] [4] The method for producing the hair clip according to [1] or [2] above, wherein the initial boiling point to the end point during distillation of the volatile oil is 80 to 120°C.

[0011] [5] The method for producing the hair clip according to [1] or [2], characterized in that the weight ratio of the denatured ethanol to the volatile oil in the mixed solution is denatured ethanol:volatile oil=6:4 to 4:6. Effect of the Invention

[0012] According to the method for manufacturing a hair clip of the present invention, the anti-slip member adheres closely to the holder and can be easily attached, while the hair clip manufacturing process and the hair clip manufactured by the manufacturing process can reduce odor. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a perspective view of a hair clip according to a first embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view of the hair clip according to the first embodiment of the present invention taken along line AA of FIG. 1. [Diagram 3] 4 is a diagram showing a process of attaching an anti-slip device to a hair clip according to a first embodiment of the present invention. FIG. [Figure 4] FIG. 11 is a perspective view of a hair clip according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a perspective view of a hair clip according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a method for manufacturing a hair clip and a hair clip according to an embodiment of the present invention will be described with reference to the drawings.

[0015] As shown in Figures 1 and 2, the hair clip according to the first embodiment of the present invention is mainly composed of a pair of clamping pieces 10 consisting of a plate-shaped outer clamping piece 20 for clamping hair and a plate-shaped inner clamping piece 30 connected to one end of the outer clamping piece 20, and an anti-slip member 40 attached so as to fit at least the outer shape of the inner clamping piece 30.

[0016] The pair of clamping pieces 10 is composed of an outer clamping piece 20 located on the outside and an inner clamping piece 30 located on the scalp side when the hair clip is attached to the hair.

[0017] The outer clamping piece 20 and the inner clamping piece 30 are formed, for example, from stainless steel or nickel-plated iron, and one end of the outer clamping piece 20 is connected to one end of the inner clamping piece 30 via a connecting portion 11.As shown in Figures 3(b)(c) and 4, when the outer clamping piece 20 and the inner clamping piece 30 are separated from each other before use, the overall shape is approximately L-shaped when viewed from the side.

[0018] In use, by pressing the tip of the outer clamping piece 20 towards the inner clamping piece 30 while supporting the connecting portion 11, the elastic action of the outer clamping piece 20 causes the outer clamping piece 20 to bend along the inner clamping piece 30, so that hair can be clamped between the outer clamping piece 20 and the inner clamping piece 30.

[0019] More specifically, the outer clamping piece 20 is formed, for example, in an oval or substantially elliptical shape, and is formed into a ring shape with a substantially central portion cut out as the gap 12, and the inner clamping piece 30 that is long along the longitudinal direction of the outer clamping piece 20 is disposed in the substantially central portion of the gap 12 via a connecting portion 11. The outer clamping piece 20 is curved so as to be convex downward toward the inner clamping piece 30 side in a side view, and a folded portion 32 is formed by folding the substantially central portion of the inner clamping piece 30 in the longitudinal direction multiple times in a mountain shape or a zigzag shape, and is connected to the outer clamping piece 20 at a base end portion 31 of the inner clamping piece 30.

[0020] The outer surface of the outer clamping piece 20 may be a decorative portion 21 decorated with leather, synthetic resin, etc. Furthermore, the inner clamping piece 30 may be provided with a long hole 33 along the longitudinal direction.

[0021] Also, a tubular anti-slip member 40 is attached to at least the inner clamping piece 30 so as to conform to the outer shape of the inner clamping piece 30. For example, as shown in Fig. 2, which is a cross-sectional view cut in the short direction of Fig. 1, when the inner clamping piece 30 is formed into a horizontally long rectangular shape in cross section, the anti-slip member 40 is attached in close contact with the rectangular shape. Here, "attached to conform to the outer shape of the inner clamping piece 30" is not limited to the anti-slip member 40 being attached in complete contact with the inner clamping piece 30, but also includes the anti-slip member 40 being attached with a small space between the inner clamping piece 30 and the member.

[0022] The anti-slip member 40 is cylindrical and is inserted through the inner clamping piece 30 to cover it, and is set shorter than the longitudinal dimension of the clamping piece 10. The anti-slip member 40 is preferably made of silicone in view of durability and the magnitude of frictional force with hair during use. In manufacturing the hair clip, a soaking process is first performed in which the anti-slip member 40 is immersed in a mixed solution 50 consisting of denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons, and is expanded. Next, the anti-slip member 40, which has been expanded by soaking in the mixed solution 50, is inserted through the inner clamping piece 30, dried, and contracted, thereby being attached to the inner clamping piece 30. In this embodiment, the anti-slip member 40 is colorless and transparent or translucent, but in other embodiments, it may be black, or a logo or message of a company or the like may be displayed on the surface of the anti-slip member 40 by printing or the like.

[0023] More specifically, as shown in FIG. 3(a), a plurality of anti-slip members 40 cut shorter than the longitudinal dimension of the inner clamping piece 30 are placed in a metal draining basket 60 and immersed in a mixed solution 50 consisting of denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons for 2 to 3 minutes. The volume of the anti-slip members 40 immersed in the mixed solution 50 expands by about 10 to 20%, so that the anti-slip members 40 can be smoothly inserted through the inner clamping piece 30 in a state in which both the outer clamping piece 20 and the inner clamping piece 30 are released, as shown in FIG. 3(b), and since the anti-slip members 40 are slippery in a state in which they contain the mixed solution 50, they can easily be inserted through the inner clamping piece 30 by overcoming the bent portion 32. The inserted anti-slip members 40 are then naturally dried or hot-air dried for about 5 to 6 minutes in a state in which both the clamping pieces are released, as shown in FIG. 3(c), so that they shrink to their original size and are attached so as to conform to the outer shape of the inner clamping piece 30. When both clamping pieces are closed, as shown in Figure 3(d), the inner clamping piece 30 fitted with the anti-slip member 40 partially overlaps with the outer clamping piece 20 in a side view, enabling the hair to be securely clamped.

[0024] The silicone used for the anti-slip member 40 may be, for example, KE-561-U (manufactured by Shin-Etsu Chemical Co., Ltd.). The dimensions of the anti-slip member 40 are preferably an outer diameter of 4 to 6 mm and an inner diameter of 2 to 4 mm. By using silicone as the material for the anti-slip member 40, it has an excellent anti-slip effect on the hair due to the frictional force with the hair.

[0025] The mixed solution 50 for expanding the non-slip member 40 in the present invention is a mixture of denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons, and is a liquid at room temperature of 20 to 30°C. Among them, the denatured ethanol is ethanol containing not only ethanol but also other alcohols such as methanol and 2-propanol. Specifically, the denatured ethanol preferably contains 60 to 90% by weight of ethanol, 5 to 15% by weight of methanol, and 0.5 to 5% by weight of 2-propanol. The volatile oil is a liquid oil containing naphthenic hydrocarbons, which are saturated hydrocarbons with at least five or six membered rings, and may contain other saturated hydrocarbons. Specifically, naphthenic hydrocarbons are preferably cyclohexane, methylcyclohexane, etc., and can be used alone or in a mixture of two or more of these. In addition, saturated hydrocarbons other than naphthenic hydrocarbons are preferably heptane, 3-methylhexane, octane, etc. The volatile oil preferably contains 20 to 50% by weight of naphthenic hydrocarbons such as cyclohexane and methylcyclohexane. In addition, in the process of drying and shrinking the non-slip member 40 immersed in the mixed solution 50 and attaching it to the inner clamping piece 30, in order to use natural drying that does not incur costs rather than hot air drying that is expensive, the initial boiling point to end point during distillation of the volatile oil under atmospheric pressure is preferably 80 to 120°C. Furthermore, the weight ratio of denatured ethanol to volatile oil in the mixed solution 50 is preferably denatured ethanol:volatile oil = 6:4 to 4:6, and more preferably denatured ethanol:volatile oil = 5.5:4.5 to 4.5:5.5. By setting the components and ratios of the mixed solution 50 as described above, in the immersion step of immersing the anti-slip member 40 in the mixed solution 50, the anti-slip member 40 expands by about 10% to 20% and can be prevented from becoming embrittled after immersion. Furthermore, in the insertion step of inserting the inner clamping piece 30 into the anti-slip member 40, attachment to the inner clamping piece 30 becomes easy, and even after being attached to the clamping piece 10, adhesion is ensured and the anti-slip member is unlikely to peel off.

[0026] A hair clip according to a second embodiment of the present invention will be described with reference to Fig. 4. The hair clip in this second embodiment mainly comprises an outer clamping piece 20 and an inner clamping piece 30, which are integrally formed via a connecting part 11 that is folded back at approximately 180 degrees at one end of the outer clamping piece 20 and connected to the inner clamping piece 30.

[0027] A hair clip according to a third embodiment of the present invention will be described with reference to Fig. 5. The hair clip in this third embodiment mainly comprises an outer clamping piece 20 and an inner clamping piece 30, and the inner clamping piece 30 is attached to the outer clamping piece 20 via a connecting part 11.

[0028] More specifically, as shown in FIG. 5, the outer clamping piece 20 has at one end a side wall 22 constituting the connecting portion 11, and at the other end two opposing pressing portions 24 each having an engagement portion 23 extending toward each other, and has a decorative portion 21 at an outer position of the outer clamping piece 20.

[0029] The inner clamping piece 30 has at one end a protrusion 34 that is pivotally supported on the side wall 22 and has at the other end an engaged portion 35 for engaging the engaging portion 23. The decorative portion 21 is made of a rectangular plate-like synthetic resin material that covers the outer clamping piece 20, but may also be an artificial flower, a precious metal, or another ornament.

[0030] Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and modifications are possible within the scope of the present invention. For example, the anti-slip member 40 can be covered with multiple silicone tubes cut shorter than the longitudinal dimension of the inner clamping piece 30. In this case, the tubes may be covered with a predetermined distance between each other, or may be partially overlapped. Note that when the notation "~" indicating a range in the description is used, it includes the upper and lower limits. EXAMPLES

[0031] The immersion step of immersing the anti-slip member 40 in the mixed solution 50 of denatured ethanol and volatile oil in the method for manufacturing a hair clip of the present invention will be specifically described below. Note that the present invention is not limited to the following examples.

[0032] <Example 1> At room temperature of 25°C, 50 g of denatured ethanol (manufactured by Kishida Chemical Industry Co., Ltd., product name: denatured ethanol) containing 85 wt% ethanol, 13 wt% methanol, and 1.1 wt% 2-propanol was mixed and stirred with 50 g of volatile oil (manufactured by ENEOS Corporation, product name: CS volatile oil) containing 15 wt% cyclohexane, 9 wt% methylcyclohexane, 10 wt% heptane, 3 wt% 3-methylhexane, and 3 wt% octane to obtain a total of 100 g of mixed solution 50.

[0033] <Comparative Example 1> At room temperature of 25° C., a mixed solution similar to that in Patent Document 1 was prepared. That is, 50 g of absolute ethanol (manufactured by Kenei Pharmaceutical Co., Ltd., product name: absolute ethanol) and 50 g of benzine (manufactured by Takabishi Chemical Co., Ltd., product name: special benzine) were mixed and stirred to obtain a total of 100 g of a mixed solution.

[0034] An immersion process was then carried out in which an anti-slip member 40 having an outer diameter of 4.5 mm, an inner diameter of 3-5 mm, and a length of 4 cm was immersed in the mixed solution of Example 1 and Comparative Example 1 for 3 minutes. An insertion process was then carried out in which the inner clamping piece 30 was inserted into the anti-slip member 40. Furthermore, the inserted anti-slip member 40 was allowed to air dry for about 15 minutes, and then a coating process was carried out in which the anti-slip member 40 was attached to the inner clamping piece 30. Various evaluations were carried out during these processes.

[0035] [Irritating odor during the immersion process] Regarding the pungent odor during the immersion process, the odor of the mixed solution was checked sensorily. Those that had no odor were rated as ◎, those that had almost no odor were rated as ○, those that had some odor were rated as △, and those that had a pungent odor were rated as ×. Of these, ◎ and ○ were judged as good, and △ and × were judged as bad.

[0036] [Expansion of the anti-slip material during the immersion process] The expansion of the anti-slip member 40 in the immersion process was visually checked. The anti-slip member 40 containing the mixed solution and expanding well was evaluated as ◎, the expanding member was evaluated as ○, the not expanding member was evaluated as △, and the hardly expanding member was evaluated as ×. Of these, ◎ and ◯ were judged as good, and △ and × were judged as bad.

[0037] [Ease of operation during insertion process] In the insertion step, the workability when inserting the inner clamping piece 30 into the anti-slip member 40 was evaluated. Those in which the inner clamping piece 30 was easily inserted into the anti-slip member 40 were evaluated as ◎, those in which it was easy to insert were evaluated as ○, those in which it was difficult to insert were evaluated as △, and those in which it was impossible to insert were evaluated as ×. Of these, ◎ and ◯ were judged as good, and △ and × were judged as bad.

[0038] [Adhesion to the inner clamping piece after the application process] The adhesion of the anti-slip member 40 to the inner clamping piece 30 after the application process was evaluated based on the state when the anti-slip member 40 was pulled out with a specified force. The anti-slip member 40 that did not move at all from the inner clamping piece 30 was evaluated as ◎, the anti-slip member 40 that hardly moved was evaluated as ○, the anti-slip member 40 that moved a little was evaluated as △, and the anti-slip member 40 that moved was evaluated as ×. Of these, ◎ and ◯ were judged as good, and △ and × were judged as bad.

[0039] [Odor after application process] Regarding odor after the application process, the odor of the anti-slip member 40 after the application process was checked sensorily. Those that had no odor were rated as ◎, those that had almost no odor were rated as ○, those that had some odor were rated as △, and those that had a nasty odor were rated as ×. Of these, ◎ and ◯ were judged as good, and △ and × were judged as bad.

[0040] The composition of the mixed solutions of each Example and Comparative Example and the results of each performance evaluation carried out using these are shown in Table 1. In each performance evaluation, only the mixed solutions marked with ⊚ and ◯, which indicate good performance, were judged to be good mixed solutions.

[0041] [Table 1]

[0042] From the above results, it was found that in Comparative Example 1, since a mixed solution of anhydrous ethanol and benzine was used, the mixed solution had a strong odor in the immersion step, making it difficult to work for a long time, and the odor originating from the mixed solution was felt even after the application step, but in Example 1, since a mixed solution of denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons was used, the mixed solution had almost no odor in the immersion step, making it possible to work for a relatively long time, and the odor originating from the mixed solution was hardly felt after the application step. Therefore, it was found that by using a mixed solution of denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons in the immersion step, the adhesion of the anti-slip member 40 to the inner clamping piece 30 was high and it was easy to attach, while the odor of the hair clip manufacturing process and the hair clip manufactured by the manufacturing process could be reduced. [Explanation of symbols]

[0043] 10...Pinch piece 20...Outer clamping piece 30...Inner clamping piece 40...Anti-slip material 50...solution

Claims

1. A method for manufacturing a hair clip comprising a pair of clips, each of which is an outer clip for clipping hair and an inner clip connected to one end of the outer clip, and a tubular silicone anti-slip member inserted through the inner clip, comprising: an immersion step of immersing the non-slip member in a mixed solution of denatured ethanol containing ethanol and methanol and volatile oil containing naphthenic hydrocarbons; an insertion step of inserting the inner clamping piece into the non-slip member expanded by immersing it in the solution; A method for manufacturing a hair clip, comprising a step of drying the inserted anti-slip member and attaching it to the inner clamping piece.

2. 2. The method for producing a hair clip according to claim 1, wherein the denatured ethanol further contains 2-propanol.

3. 3. The method for producing a hair clip according to claim 1, wherein the naphthenic hydrocarbon is at least one of cyclohexane and methylcyclohexane.

4. The method for producing a hair clip according to claim 1 or 2, characterized in that the initial boiling point to the end point during distillation of the volatile oil is 80 to 120°C.

5. The method for manufacturing a hair clip according to claim 1 or 2, characterized in that the weight ratio of the denatured ethanol to the volatile oil in the mixed solution is denatured ethanol:volatile oil=6:4 to 4:6.

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