JP2008212509A - Bristle material for toilet brush and toilet brush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bristle material for a toilet brush which excels in the containing condition and application capability of a cosmetic compared with a conventional bristle material for the toilet brush which is made of a synthetic resin, has a very good feel to the skin, and is provided with capability which may be enough equal to animal hair, and the toilet brush using this bristle material. <P>SOLUTION: In the bristle material 1 for the toilet brush which consists of cut bristles each made of a modified cross-section synthetic resin monofilament, the cut bristle has a spiral groove 4 which is continuation twist formed in the circumference, a wave form 6 which is continuation formed in a fiber axis direction, and a taper part 2 at at least one end. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cosmetic brush hair material that is excellent in the inclusion condition and application performance of cosmetics such as cosmetic powders and cosmetic liquids, and also has a good touch to the skin, and a cosmetic brush using the cosmetic brush hair material. is there.

  Conventionally, animal hairs such as goats, squirrels and weasels have been used extensively as hair materials for makeup brushes, but in recent years it has become difficult to procure these animal hairs. The use of synthetic resin-made cosmetic brush hair materials is increasing.

  This synthetic resin cosmetic brush hair material is generally a taper-shaped straight monofilament with a round cross section. This hair material has a smoother surface than animal hair. Since the cosmetics are difficult to adhere to the brush, the cosmetics are poorly contained, and the cosmetics are easily detached at the initial stage of application, resulting in uneven application. It had a problem that it was hard and had a tingling sensation on the skin and a poor touch on the skin.

  As a hair brush material for cosmetic brushes that has improved these problems, a synthetic resin hair material in which a plurality of irregularities are formed on the cross section of the hair material (for example, see Patent Document 1), and a constant wave shape in the fiber axis direction are formed. A synthetic resin hair material (see, for example, Patent Document 2) is already known.

However, these conventional synthetic resin hair brushes for cosmetic brushes are improved to a certain extent in terms of cosmetic inclusion, application performance and skin feel when used as a cosmetic brush, but the improvement effect is still sufficient. However, the realization of a synthetic resin cosmetic brush hair material that has performance comparable to animal hair has been sought after.
Japanese Patent No. 1545642 (first page) Japanese Patent Laying-Open No. 2005-95457 (first page)

  The present invention has been achieved as a result of studying the solution of the problems in the prior art described above as an issue.

  Therefore, the object of the present invention is superior to the conventional synthetic resin hair brush for cosmetic brushes, and is excellent in the condition of application of cosmetics and the application performance, has a very good touch on the skin, and can be sufficiently comparable to animal hair. It is an object of the present invention to provide a synthetic resin bristle material and a cosmetic brush having performance.

  In order to achieve the above object, according to the present invention, there is provided a hair material for a cosmetic brush comprising a cut bristle of a modified cross-section synthetic resin monofilament, and the cut bristle has a spiral groove formed on the outer periphery continuously. There is provided a bristle material for a cosmetic brush characterized by having a waveform continuously formed in the fiber axis direction and a tapered portion formed at least at one end thereof.

In the hair material for the makeup brush of the present invention,
The cross-sectional shape of the modified cross-section synthetic resin monofilament is a polygon or multi-leaf shape of 3 to 8,
The number of pitches of the spiral grooves formed by continuous twisting on the outer periphery of the cut bristle is in the range of 0.5 to 15 / cm with respect to the length in the fiber axis direction, and continuous in the fiber axis direction. A preferable condition is that the wavelength of the formed waveform is in the range of 2 to 10 mm and the wave height is in the range of 0.5 to 4 mm.

  In addition, the cosmetic brush of the present invention is characterized in that the above-described cosmetic brush hair material is used as at least a part of the hair material.

  According to the present invention, there is provided a synthetic resin cosmetic brush hair material and a cosmetic brush that are excellent in the degree of inclusion and application performance of cosmetics, have a very good feel on the skin, and have performance that can be sufficiently comparable to animal hair. Obtainable.

  The hair material for a makeup brush and the makeup brush of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view and a partially enlarged cross-sectional view showing an example of a bristle material for a cosmetic brush according to the present invention, wherein 1 is a bristle material for a cosmetic brush, and 2 is a tapered portion formed at one end of the bristle material for a cosmetic brush. Reference numeral 3 denotes a straight portion, 4 denotes a continuous spiral groove, 5 denotes a cross section of the bristle material, 6 denotes a waveform, L denotes a waveform wavelength, and H denotes a wave height.

  As can be seen from FIG. 1, the bristle material 1 for a cosmetic brush according to the present invention comprises a cut bristle obtained by cutting a synthetic resin monofilament having an irregular cross section (in this embodiment, the cross section 5 is a quadrangle) into a desired length, and on the outer periphery. A spiral groove formed by continuous twisting and a corrugation 6 formed continuously in the fiber axis direction are formed, and at least one end thereof is formed with a tapered portion 2 sharp toward the tip.

  In other words, the cosmetic brush hair material 1 of the present invention has a continuous spiral groove 4 on the outer periphery of the monofilament and a corrugation 6 continuous in the fiber axis direction, so that a conventional synthetic resin cosmetic brush hair material is provided. Compared with, it exhibits excellent cosmetic content and application performance. Further, when the brush is processed into a makeup brush, the tip of the brush is easily spread and the hair material is easily bent, so that the hair material for the makeup brush has a very good touch to the skin.

  In addition, by satisfying the above-mentioned conditions, it is possible to obtain an improvement effect that is excellent in the condition and application performance of the cosmetics, and that is excellent in the touch to the skin. 3 to 8 polygonal or multi-lobal shape, and more preferably 4 to 7 polygonal or multi-lobal cross section. It is more preferable.

  The pitch number of the continuous spiral grooves 6 formed on the outer periphery is in the range of 0.5 to 15 pieces / cm, particularly in the range of 0.6 to 12 pieces / cm with respect to the length in the fiber axis direction. It is preferable that the cosmetics are distributed, and the cosmetics can be easily held in this way, and the cosmetics are not discharged at a time when applied, and are held in the continuous spiral groove 6. Can be discharged slowly, and a uniform and durable coating effect can be easily obtained. On the other hand, when the number of pitches of the continuous spiral groove 6 is less than the above range or exceeds the range, the inclusion condition of the cosmetic and the application performance are inferior, and a sufficient improvement effect cannot be obtained.

  Furthermore, it is more preferable that the wavelength L of the waveform 6 is in the range of 2 to 10 mm, particularly 3 to 8 mm, and the wave height H is in the range of 0.5 to 4 mm, particularly 0.6 to 3 mm. That is, by setting it as said range, while holding | maintenance of the cosmetics to a hair material further improves, the touch to skin becomes very favorable because the bending | flexion of a hair material is provided moderately.

  On the other hand, when the wavelength L and the wave height H of the waveform 6 are less than the above range or exceed the range, the cosmetic application effect and the feel to the skin are deteriorated, and a sufficient improvement effect cannot be obtained.

  Further, it is necessary that at least one end of the hair material for the cosmetic brush of the present invention has a sharp taper shape toward the tip, and by satisfying this condition, the touch to the skin becomes animal hair. A similar cosmetic brush hair material is obtained.

  Here, the outer shape of the straight portion 3 of the hair brush for cosmetic brush according to the present invention can be appropriately selected according to the type of the makeup brush, but considering the feel to the skin required for the makeup brush, It is preferably in the range of 0.05 to 0.25 mm, more preferably in the range of 0.07 to 0.20 mm.

  The synthetic resin used for the cosmetic brush hair material 1 of the present invention is not particularly limited as long as it can be melt-spun, and can be arbitrarily selected. When forming a taper shape at at least one end, it is preferable to use a polyester-based resin such as polyethylene terephthalate, polybutylene terephthalate, and polypropylene terephthalate because it can be easily tapered by an alkali dissolution method, as will be described later. .

  Further, the hair material 1 for a cosmetic brush of the present invention includes additives such as a heat resistance agent, a light resistance agent, an antioxidant, an antistatic agent, an antibacterial agent, a colorant, and a plasticizer as long as the present invention is not inhibited. Can be optionally contained.

  Next, the manufacturing method of the hair brush 1 for a cosmetic brush according to the present invention will be described below with a specific example.

  In addition, the manufacturing method demonstrated below is only an example for obtaining the bristle material 1 for cosmetic brushes of this invention, and is not limited to this method altogether.

  First, a synthetic resin chip as a raw material is supplied to a known melt spinning machine, and then extruded from a spinneret hole having a desired irregular cross-sectional shape, cooled, individualized, and hot-stretched monofilament is wound up.

  Next, the irregularly shaped monofilament once wound is applied to a twisting machine and twisted to give spiral grooves having a pitch number of 0.5 to 15 / cm on the outer periphery of the monofilament. In this state, twisting tends to return due to single twisting, and then heat treatment under the desired heat setting conditions is performed to perform twisting prevention setting, and then it is spirally passed through a pair of gears symmetrically in the vertical direction. A monofilament in which the waveform along the groove and the fiber axis direction is continuously formed is completed, and this is once bundled and wound.

  At this time, the wavelength and wave height of the target waveform can be set by changing the pitch of the gear and the gap between the upper and lower gears.

  The wound monofilament bundle is then cut to a length generally in the range of 25-70 mm and processed into a cut bristle. Thereafter, at least one end of the cut bristle is tapered to form a tapered portion.

  Here, as a processing method of the taper portion, physical treatment such as polishing or chemical treatment such as acid / alkali dissolution method can be adopted. Particularly, the alkali dissolution method can easily form a tapered shape. In addition, the tapered portion having a desired shape can be easily formed by appropriately adjusting the concentration of the alkali solution, the temperature of the alkali solution, the immersion depth in the alkali solution, the immersion time, and the like.

  The cosmetic brush of the present invention using the hair material for a cosmetic brush obtained by the above production method can be produced by a known method, and the production method is not particularly limited.

  EXAMPLES The present invention will be further described with reference to the following examples. The performance evaluation of each cosmetic brush in the examples and comparative examples was performed by the following method.

[Coating performance]
Fifteen adult women were asked to apply powder cosmetics (ivy cosmetics: face color powder) to their skin using animal hair face brushes and the face brushes produced in the examples and comparative examples. Based on the following criteria, an answer was obtained regarding the appearance of cosmetic powder in the makeup brush and the occurrence of application spots.
Judgment: ◎ ・ ・ ・ There was a lot of cosmetic powder in comparison with the one using animal hair, and there were few application spots,
○ ・ ・ ・ It was the same amount of cosmetic powder as that used for animal hair and applied spots.
△ ・ ・ ・ There was less cosmetic powder included than animal hair, and there were more applied spots.
X: The cosmetic powder was much worse than the animal hair, and the coating spots were also remarkable.

[Feel to the skin]
Simultaneously with the evaluation of the application performance of the cosmetics, an answer was also obtained regarding the touch to the skin based on the following criteria.
Judgment: 1 ... It was extremely flexible and had a better tactile feel than that of animal hair.
2 ... It was flexible and had a tactile sensation equivalent to that using animal hair.
3 ... Slightly inferior to those using animal hair, but there was no practical problem.
4 ... Stimulation and lack of flexibility were felt compared to those using animal hair, and the touch was not good.
5: Compared with animal hair, irritation and lack of flexibility were strongly felt and the touch was poor.

[Example 1]
Using polybutylene terephthalate resin (PBT1200S manufactured by Toray Industries, Inc.), the resin heated and melted at 270 ° C. by an extruder type spinning machine is extruded from a rectangular nozzle corresponding to a deformed cross-sectional shape, and then cooled. Then, a tetragonal monofilament having a circumscribed circle of 0.100 mm was prepared. Subsequently, this monofilament having a square cross section was twisted by a twisting machine to give a spiral groove having a pitch number of 2.0 pieces / cm to the outer periphery of the monofilament and wound up once. Next, after performing the anti-twist set while heating to 180 ° C., and passing through the gap between the pair of gears symmetrically in the vertical direction, a waveform having a wavelength of 4 mm and a wave height of 2 mm was continuously formed. The monofilament was once bundled and wound up.

  Further, this monofilament was cut to a desired length to form a bristle, and then a taper portion was formed at one end of the bristle by an alkali dissolution method to produce a hair material for a cosmetic brush.

  Then, a face brush was produced by planting the hair material for the makeup brush on the base.

[Example 2]
A hair brush and a face brush for a cosmetic brush were produced in the same manner as in Example 1 except that the shape of the nozzle hole was changed to produce a monofilament having a five-leaf cross section.

[Examples 3, 4, and 5 and Comparative Examples 1 and 2]
A cosmetic brush hair material and a face brush were produced in the same manner as in Example 1 except that the number of spiral grooves and the wave shape were changed as shown in Table 1.

[Comparative Example 3]
In Example 1, except that the shape of the nozzle hole was changed to a round cross section, and the resulting monofilament was not processed into a taper shape, the hair material for a cosmetic brush and the face brush were processed in the same manner as in Example 1. Was made.

  Table 1 shows the evaluation results of these cosmetic brush hair materials and face brushes.

  As is apparent from the results in Table 1, the cosmetic brush obtained by planting the hair material for cosmetic brushes of the present invention has a powder containing performance equal to or higher than animal hair and a coating performance, and feel to the skin. Is also excellent.

  The cosmetic brush made by flocking the hair material for the synthetic resin cosmetic brush according to the present invention is excellent in containing and applying cosmetic powder, and is very comfortable to the skin and comfortable to use. It can be said that the place that contributes to the switch to the makeup brush is extremely large.

It is the side view and partially expanded sectional view which show an example of the bristle material for makeup brushes of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hair material for makeup brushes 2 Tapered part 3 Straight part 4 Spiral groove 5 Cross-sectional shape 6 Waveform L Wavelength H Wave height

Claims (5)

A hair material for a cosmetic brush comprising a cut bristle made of a synthetic resin monofilament having a modified cross section, the cut bristle having a spiral groove continuously twisted on the outer periphery and a waveform continuously formed in the fiber axis direction. A hair material for a cosmetic brush, wherein a taper portion is formed at least at one end thereof. The bristle material for a cosmetic brush according to claim 1, wherein the cross-sectional shape of the irregular cross-section synthetic resin monofilament is a polygon or multi-leaf shape of 3 to 8. The pitch number of the spiral groove formed by continuous twisting on the outer periphery of the cut bristle is in the range of 0.5 to 15 / cm with respect to the length in the fiber axis direction. Hair material for makeup brushes as described in 2. The wavelength of the waveform continuously formed in the fiber axis direction is in the range of 2 to 10 mm, and the wave height is in the range of 0.5 to 4 mm. The bristle material for makeup brushes as described. A cosmetic brush, wherein the hair material for a makeup brush according to any one of claims 1 to 4 is used for at least a part of the hair material.

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