JP2009285445A - Anti-bacterial make-up brush and method of manufacturing brush bristle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an anti-bacterial make-up brush, sanitary and safe, and exhibiting anti-bacterial performance over a long period of time while protecting the global ecology environment. <P>SOLUTION: This anti-bacterial make-up brush is a make-up brush whose brush bristles are formed of synthetic fibers. The brush bristles contain 20 pts.wt. synthetic fiber containing an inorganic antimicrobial agent in 100 pts.wt. brush bristles, and the synthetic fiber containing the inorganic antimicrobial agent contains 0.02-3 pts.wt. inorganic anti-bacterial agent in 100 pts.wt. In manufacturing this make-up brush, 30-1 pts.wt. inorganic antimicrobial agent is mixed with 70-90 pts.wt. resin of one kind selected from thermoplastic resins, molten and dispersed. After that, a master batch is manufactured by extrusion molding, and subsequently the master batch is mixed with thermoplastic raw material resin, molten and dispersed. After that, the mixture is subjected to spinning to thereby make a brush bristle. The master batch is mixed so that 0.02-3 pts.wt. inorganic antimicrobial agent is contained in 100 pts.wt. brush bristle. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a cosmetic brush having antibacterial properties and a method for producing the brush hair.

  Until now, animal hair has been generally used as the brush hair of cosmetic brushes, but it is gradually becoming difficult to obtain from the viewpoints of animal welfare and global ecological protection. Therefore, attempts are currently being made to use synthetic fibers as a material to replace such animal hair.

  On the other hand, with increasing social health and cleanliness, attempts have been made to impart antibacterial properties in a wide range of fields such as daily necessities, kitchen utensils, bath utensils, toilet articles, and home appliances.

  Even in cosmetic brushes using synthetic fibers as brush hairs, attempts have been made to impart antibacterial properties by adsorbing, penetrating or reacting the organic antibacterial agent to the surface of the brush hairs.

  As a method for producing such a cosmetic brush having antibacterial properties, conventionally, an organic antibacterial agent is applied to the surface of the brush hair by immersing brush hair made of animal hair and / or synthetic fibers in an organic antibacterial solution. There is known a method of attaching (see JP 2002-223857 A, JP 2005-323953 A, JP 2006-141991 A, and JP 2006-346493 A). In this method, antibacterial properties can be imparted to the various types of cosmetic brushes simply by subjecting them to a simple process such as dipping. Therefore, a cosmetic brush having antibacterial properties can be obtained very simply.

  Japanese Patent Application Laid-Open No. 9-23925 proposes a cosmetic brush using a mixed hair of synthetic fibers containing an inorganic antibacterial agent and natural animal hair.

JP 2002-223857 A JP 2005-323953 A JP 2006-141991 JP 2006-346493 A JP-A-9-23925

  However, the above-described method for attaching an organic antibacterial agent has a problem that the antibacterial persistence is insufficient, although effective antibacterial properties are exhibited immediately after the surface treatment with the organic antibacterial agent. It was. That is, when the use of the cosmetic brush is repeated, the attached antibacterial agent is eluted and desorbed, and the concentration of the antibacterial agent on the surface is lowered, so that the antibacterial property is not expressed. Organic antibacterial agents also have problems in terms of safety, such as causing rough skin.

  In addition, in order to keep the cosmetic brush clean, it is desirable to wash it after use. However, in the case of a brush using animal hair, the animal hair is inferior in water-removing property. Has the disadvantage of taking time.

  For this reason, in general, only the cosmetics are wiped off after use, and the user has not been able to obtain a satisfactory cleanliness.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a cosmetic brush that is hygienic and safe and that exhibits antibacterial properties over a long period of time while protecting the global ecological environment. .

  The present invention for solving the above-mentioned problems is a cosmetic brush in which brush hair is formed from synthetic fibers, and the brush hair contains synthetic fibers containing an inorganic antibacterial agent in 100 parts by weight of the brush hair. The synthetic fiber containing 20 parts by weight or more and containing the inorganic antibacterial agent comprises 0.02 to 3 parts by weight of the inorganic antibacterial agent in 100 parts by weight thereof. Related to the brush.

  A synthetic fiber containing an inorganic antibacterial agent is blended with 30 to 1 part by weight of an inorganic antibacterial agent in 70 to 99 parts by weight of a kind of resin selected from thermoplastic resins, and melted and dispersed, and then extruded. A masterbatch is manufactured by molding, then the masterbatch is blended in a thermoplastic raw material resin, melted and dispersed, and then spun. The masterbatch is blended so that 0.02 to 3 parts by weight of the inorganic antibacterial agent is contained in parts by weight.

  The content of the inorganic antibacterial agent is more preferably 0.05 to 2 parts by weight. The average particle size of the inorganic antibacterial agent is preferably 10 μm or less, more preferably 0.1 μm or more and 5 μm or less.

  Further, the resin of the masterbatch and the raw material resin are preferably the same resin, and most preferably a polybutylene terephthalate resin.

  As described above, the antibacterial cosmetic brush according to the present invention is formed to contain 20 parts by weight or more of synthetic fibers containing an inorganic antibacterial agent therein. Inorganic antibacterial agents are excellent in safety, and have an advantage that they do not cause skin problems such as roughness.

  In addition, because it is composed of synthetic fibers, it has a faster drying speed than conventional cosmetic brushes made of brush hair including animal hairs. Cleaning after use can be performed without any hesitation, and the cosmetic brush can always be kept clean.

  Also, since the inorganic antibacterial agent is contained inside the brush hair, it does not elute easily like the organic antibacterial agent attached to the brush hair surface, and the inorganic antibacterial agent is contained in the brush hair. Since antibacterial metal ions are only slowly released from the skin, even against repeated rinsing, resident bacteria derived from human skin that have not been removed by washing, and falling bacteria that adhere to the brush during storage Thus, antibacterial properties can be maintained for a long time.

  In addition, inorganic antibacterial agents have excellent heat resistance and do not change even when melt-spun at a high temperature after being mixed with a thermoplastic resin, so they can be kneaded into synthetic fibers (brush hair) without deactivating their antibacterial effects. Can do.

  The brush bristles of the antibacterial cosmetic brush according to the present invention are composed of synthetic fibers and contain at least inorganic fiber containing synthetic antibacterial agent, which is obtained by blending an inorganic antibacterial agent with a synthetic fiber raw material resin. Is done.

  Synthetic fibers that become brush hairs include polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate and polynaphthalene terephthalate, polyester elastomer fibers such as polyester / ether block copolymer, polyolefin fibers such as polyethylene and polypropylene, Mention may be made of polyamide fibers such as nylon 6, nylon 12, nylon 10, nylon 17, nylon 46, nylon 66, nylon 69, nylon 612, nylon 610 and the like, and acrylic fibers such as polyacrylonitrile and polymodacrylic. it can.

  The synthetic fiber containing the inorganic antibacterial agent is in a molten state when the synthetic fiber is a fiber produced from a thermoplastic resin such as a polyester fiber, a polyolefin fiber, or a polyamide (nylon) fiber. A predetermined amount of an inorganic antibacterial agent is blended and dispersed in the raw material resin, and the raw material resin is manufactured by a melt spinning method.

  In addition, as a method of blending and dispersing the inorganic antibacterial agent in the raw material resin, first, 30 to 1 part by weight of the inorganic antibacterial agent is blended with 70 to 99 parts by weight of a kind of resin selected from the thermoplastic resins. It is preferable to take a technique in which after melting and dispersing, a chip-shaped master batch is manufactured by extrusion molding, and then an appropriate amount of the master batch is blended in a desired raw material resin and melted and dispersed. .

  In this case, it is preferable that the resin of the master batch and the raw material resin are the same resin. In the case of the same resin, the masterbatch resin and the raw material resin have good mixing properties, and the inorganic antibacterial agent is uniformly dispersed as a whole. This is because the mixing property of the resin and the raw material resin is not always good (not compatible), and therefore, the inorganic antibacterial agent cannot be uniformly dispersed, and the antibacterial durability of the obtained fiber is not good. This is because there is a problem that it is inferior, and since the dispersibility is poor, there is a problem that yarn breakage tends to occur during spinning.

  In the case of acrylic fibers, a predetermined amount of an inorganic antibacterial agent is blended and dispersed in a stock solution in which a resin is dissolved, and is manufactured by a solution spinning method.

  Of these synthetic fibers made of various resins, fibers made of polybutylene terephthalate are preferable because they provide a soft feeling of use.

  Moreover, in order to obtain a soft feeling of use, the synthetic fiber preferably has a fiber diameter of 0.2 mm or less.

  Furthermore, in order to develop a feeling of use suitable for the intended use, a plurality of synthetic fibers having different fiber diameters may be mixed and used.

  Further, the synthetic fiber may be a composite fiber in which resins of different molecular weights or types are arranged in Side By Side or Sheath-Core type. In the case of the Sheath-Core type in which the inner side and the outer side are made of different types of resins, it is economically advantageous to add an inorganic antibacterial agent only to the outer resin that exhibits a high effect on the development of antibacterial properties. The synthetic fiber may have a so-called “deformed cross-section yarn” such as a Y-hole, W-shaped, triangular hollow, or star-shaped cross section.

  In addition, in order to improve the soft feel of cosmetic brushes and to improve the inclusion of cosmetics such as liquids, emulsions, creams, gels, gels, foams, powders, etc. into the brush, You may post-process by the chemical process which divides | segments the front-end | tip of a fiber, or makes the front-end | tip taper shape.

  As the inorganic antibacterial agent, one in which one or more antibacterial metals of silver, zinc and copper are supported on an inorganic compound can be used. Examples of the support include zeolite, apatite, zirconium phosphate, titanium oxide, silica gel, aluminum sulfate hydroxide, calcium phosphate, and calcium silicate. Glass with phosphoric acid, boric acid, or silicic acid glass containing one or more glass forming components containing silver, zinc, copper, or two or more antibacterial metals Quality antibacterial agents can also be used as inorganic antibacterial agents. Of course, an antibacterial agent carrying an antibacterial metal and a glassy antibacterial agent can be used in combination.

  The inorganic antibacterial agent in the present invention is desirably smaller in average particle size from the viewpoint of ease of expression of antibacterial properties and workability such as productivity and yarn breakage during spinning as an industrial product, but too much If the particle size is too small, it is costly to pulverize and classify, which is economically disadvantageous. On the other hand, if the particle size is too large, antibacterial properties are difficult to be expressed, and there are problems such as thread breakage during fiberization. It is preferably 10 μm or less, particularly preferably in the range of 0.1 μm or more and 5 μm or less.

  In addition, if the content of the inorganic antibacterial agent contained in the synthetic fiber is too small, good antibacterial properties cannot be obtained. On the other hand, if the content is too large, nozzle clogging may occur during spinning, or the feeling of use of the cosmetic brush may be reduced. There are problems such as hardening, and the inorganic antibacterial agent is expensive and disadvantageous economically. Therefore, the content of the inorganic antibacterial agent contained in 100 parts by weight of the synthetic fiber is preferably 0.02 to 3 parts by weight, and more preferably 0.05 to 2 parts by weight.

  In the present invention, in order to impart desired characteristics to the synthetic fiber, a known concealing agent, heat-resistant agent, weathering agent, plasticizer, antioxidant, antistatic agent may be used as long as the object of the present invention is not impaired. , Conductive agent, dye or pigment may be included.

  In the antibacterial cosmetic brush according to the present invention, a mixture of a plurality of brush hairs made of a plurality of the synthetic fibers can be used.

  In the cosmetic brush of the present invention, the synthetic fiber containing the inorganic antibacterial agent is preferably contained in an amount of 20 parts by weight or more, more preferably 30 parts by weight or more, based on 100 parts by weight of the entire cosmetic brush hair. . This is because the antibacterial property as a cosmetic brush is inferior when the use ratio of the synthetic fiber containing the inorganic antibacterial agent is small. In this sense, the cosmetic brush can be composed only of synthetic fibers containing the inorganic antibacterial agent.

  Hereinafter, the present invention will be described in more detail using specific examples.

  First, a method for evaluating a cosmetic brush according to each example and comparative example will be described.

(Pre-cleaning treatment)
In order to evaluate the antibacterial durability of the cosmetic brush used as each sample, a washing operation was performed as follows. That is, water containing 0.14% of a JAFET standard detergent was used as a cleaning solution, and the process consisting of the following cleaning process and rinsing process was performed as a single cleaning, and this was repeated a predetermined number of times for cleaning. Here, the JAFET detergent refers to a standard detergent specified by the Fiber Evaluation Technology Council.
Washing step: Using 500 ml of washing solution, shaking for 30 seconds at 40 ° C., and then draining with a hand drawn.
Rinsing step: Using 500 ml of water, shaking and rinsing at 40 ° C. for 30 seconds, and then draining by hand squeezing twice.

(Antimicrobial evaluation)
The cosmetic brush after the pre-cleaning was subjected to an antibacterial test against Staphylococcus aureus according to the microbial liquid absorption method of JIS L 1902, and the antibacterial activity was evaluated by the bacteriostatic activity value defined in JIS L 1902. A bacteriostatic activity value of 2 or more is determined to have an antibacterial effect.

(Kansei evaluation)
Each cosmetic brush was used by 10 people every day for 2 months, and its soft feeling was evaluated. Also, after use, the cosmetic brush is washed once with soap solution and then rinsed twice with water, then thoroughly wiped off with a dry cloth, left to stand and dried, and after 12 hours have passed since drying. The hair was brought into contact with the skin to evaluate its dryness. The feeling of use and the feeling of dryness were evaluated with 1 to 6 points, and the average value was determined as the evaluation point of each sample, and determined according to the following criteria.
Good (◯): Evaluation point is 4 points or more Slightly good (Δ): Evaluation point is 2 points or more and less than 4 points Poor (x): Evaluation point is less than 2 points

(Examples 1-4)
First, an inorganic antibacterial agent composed of silver phosphoric acid / borate glass having an average particle size of 0.5 μm, titanium oxide, and polybutylene terephthalate resin (PBT) or polyethylene terephthalate resin (PET) that does not contain an inorganic antibacterial agent And two types of master batches (master batches A and B) were prepared. The composition is shown in Table 1 below.

  Next, using a polybutylene terephthalate resin (PBT) serving as a fiber raw material resin and the master batch A or B, these are melted and mixed at a predetermined ratio, and then the fiber diameter is 0.05 mm by a melt spinning method. Synthetic fibers were spun and cosmetic brushes according to Examples 1 to 4 were obtained using the synthetic fibers as brush hairs. And the antibacterial property was evaluated according to the said method about the obtained cosmetic brush of Examples 1-4. The results are shown in Table 2 below. The numerical value in () in the table | surface has shown content of the inorganic type antibacterial agent contained in 100 weight part of synthetic fibers.

  As shown in Table 2 above, it can be seen that the cosmetic brushes according to Examples 1 to 4 exhibited good antibacterial properties even when the number of washings was repeated 15 times.

  In particular, the cosmetic brushes according to Examples 3 and 4 in which the fiber raw resin and the masterbatch B resin are the same resin (both polybutylene terephthalate resin) have a cleaning resistance of 60 times or more for antibacterial durability. ing. This is because the raw material resin of the fiber and the resin of the masterbatch B are the same resin, so that the compatibility when melted and mixed is good, and the inorganic antibacterial agent is uniformly dispersed throughout the fiber. It seems to be due to what has been done.

  Although not shown in Table 2, the fiber of Example 2 was frequently broken during spinning.

(Examples 5 to 9 and Comparative Example 1)
Using polybutylene terephthalate resin (PBT), which is a raw material resin for fibers, and the master batch B, these are melted and mixed at a predetermined ratio, and then a synthetic fiber having a fiber diameter of 0.08 mm is spun by a melt spinning method. The cosmetic brushes according to Examples 5 to 9 and Comparative Example 1 were obtained using this synthetic fiber as brush hairs. Then, the antibacterial properties of the cosmetic brushes according to Examples 5 to 9 and Comparative Example 1 obtained were evaluated according to the above method. The results are shown in Table 3 below. The numerical value in () in the table | surface has shown content of the inorganic type antibacterial agent contained in 100 weight part of synthetic fibers.

  As shown in Table 3, all of the cosmetic brushes of Examples 5 to 9 containing 0.02 part by weight (%) or more of an inorganic antibacterial agent with respect to 100 parts by weight (%) of the fiber. It can be seen that the antibacterial durability is excellent in antibacterial properties because it has a wash resistance of about 30 times.

  On the other hand, the antibacterial property of the cosmetic brush of Comparative Example 1 containing only 0.008 part by weight (%) of the inorganic antibacterial agent is not expressed, and therefore, the antibacterial durability is good. It can be seen that 0.02 to 3 parts by weight (%) of an inorganic antibacterial agent needs to be contained in the synthetic fiber in order to impart washing resistance.

  In addition, since the inorganic antibacterial agent is expensive, the content of the inorganic antibacterial agent is within the range of 0.05 to 2 parts by weight considering both the economical aspect and the antibacterial effect. More preferably.

(Examples 10 to 13 and Comparative Example 2)
First, an inorganic antibacterial agent with various average particle diameters composed of an equal mixture of silver / zinc-based zeolite and silver phosphate glass, titanium oxide, and polybutylene terephthalate resin (PBT) that does not contain an inorganic antibacterial agent. A master batch C was prepared. The composition of the master batch C is the same as that of the master batch B shown in Table 1.

  Next, a polybutylene terephthalate resin (PBT), which is a raw material resin for fibers, and the master batch C are melted and mixed at a predetermined ratio, and then a synthetic fiber having a fiber diameter of 0.04 mm by a melt spinning method. The cosmetic brushes according to Examples 10 to 13 and Comparative Example 2 were obtained using this synthetic fiber as brush hairs. And the antibacterial property was evaluated according to the said method about the obtained cosmetic brush of Examples 10-13 and Comparative Example 2. The results are shown in Table 4 below. In addition, the numerical value in () in the table | surface has shown content of the inorganic type antibacterial agent contained in 100 weight part of synthetic fibers.

  As shown in Table 4, each of the cosmetic brushes of Examples 10 to 13 having an inorganic antibacterial agent having an average particle size of 0.1 to 10 μm has a wash resistance of about 30 times for antibacterial durability. It is understood that the antibacterial property is excellent.

  In particular, the cosmetic brushes of Examples 10 to 12 have a wash resistance of 60 times or more. From the above, the average particle diameter of the inorganic antibacterial agent is preferably 10 μm or less. It can be seen that the thickness is more preferably 1 to 5 μm.

  In addition, about the fiber of the comparative example 2, since the thread breakage occurred frequently at the time of the spinning, the fiber used as a sample could not be manufactured. For this reason, as shown in Table 4, antibacterial properties could not be evaluated.

(Example 14 and Comparative Examples 3 to 5)
The cosmetic brushes according to Example 14 and Comparative Examples 3 to 5 were prepared using the mixed hairs of the hair and goat wool of Example 3 shown in Table 2 and mixed at different mixing ratios. . And according to the said method, the usability | use_condition and dry feeling were evaluated about the cosmetic brush which concerns on obtained Example 14 and Comparative Examples 3-5. The results are shown in Table 5 below.

  As shown in Table 5, the cosmetic brush of Example 14 using only the fibers according to Example 3 as the bristles was good in both feeling of use and dryness. The higher the ratio, the worse the dryness.

(Examples 15 to 18 and Comparative Examples 6 and 7)
Examples 15 to 15 were prepared using the synthetic fibers of Example 11 having different fiber diameters, and standard fibers not containing an inorganic antibacterial agent spun only with PBT and mixed at different mixing ratios. 18 and a cosmetic brush according to Comparative Examples 6 and 7 were prepared. And about the obtained Examples 15-18 and the cosmetic brush which concerns on Comparative Examples 6 and 7, antibacterial property, usability, and dry feeling were evaluated according to the said method. The results are shown in Table 6 below.

  As shown in Table 6, the cosmetic brushes according to Examples 15 to 18 and Comparative Examples 6 and 7 were all good in feeling of use and dry feeling, but the Comparative Examples 6 and 7 were antibacterial. The property was low. From Table 6, the synthetic fiber containing the inorganic antibacterial agent is preferably mixed with 20 parts by weight or more, more preferably 30 parts by weight or more, based on 100 parts by weight of the entire cosmetic brush hair. I understand.

  As described above, according to the present invention, it is possible to provide a cosmetic brush that is hygienic and safe and exhibits antibacterial properties over a long period of time.

Claims (11)

  The brush hair is a cosmetic brush formed of synthetic fibers, and the brush hair contains 20 parts by weight or more of synthetic fibers containing an inorganic antibacterial agent in 100 parts by weight of the brush hair, and the inorganic antibacterial The antibacterial cosmetic brush, wherein the synthetic fiber containing the agent contains 0.02 to 3 parts by weight of an inorganic antibacterial agent in 100 parts by weight thereof.   The antibacterial cosmetic brush according to claim 1, wherein the content of the inorganic antibacterial agent is 0.05 to 2 parts by weight.   The antibacterial cosmetic brush according to claim 1 or 2, wherein the inorganic antibacterial agent has an average particle size of 10 µm or less.   The antibacterial cosmetic brush according to claim 1 or 2, wherein the inorganic antibacterial agent has an average particle size of 0.1 µm to 5 µm.   The antibacterial cosmetic brush according to any one of claims 1 to 4, wherein the synthetic fiber is a fiber made of polybutylene terephthalate. After blending 30 to 1 part by weight of an inorganic antibacterial agent with 70 to 99 parts by weight of a kind of resin selected from thermoplastic resins, melting and dispersing, a master batch is manufactured by extrusion molding, The masterbatch is blended into a plastic raw material resin, melted and dispersed, and then spun into a brush hair for producing cosmetic brush hair,
The method for producing a cosmetic brush hair, wherein the masterbatch is blended so that 0.02 to 3 parts by weight of the inorganic antibacterial agent is contained in 100 parts by weight of the brush hair. .   The method for producing cosmetic brush hair according to claim 6, wherein the masterbatch is formulated so that 0.05 to 2 parts by weight of the inorganic antibacterial agent is contained.   The method for producing cosmetic brush hair according to claim 6 or 7, wherein the inorganic antibacterial agent has an average particle size of 10 µm or less.   The method for producing cosmetic brush hair according to claim 6 or 7, wherein the inorganic antibacterial agent has an average particle size of 0.1 µm to 5 µm.   The method for producing cosmetic brush hair according to any one of claims 6 to 9, wherein the resin of the masterbatch and the raw material resin are the same resin.   The method for producing a cosmetic brush hair according to claim 10, wherein the masterbatch resin and the raw material resin are polybutylene terephthalate resins.