KR100331108B1 - Antibacterial artificial nail and method for production thereof - Google Patents

Abstract

The present invention relates to an artificial nail excellent in antibacterial properties. The present invention also relates to a method for producing an antimicrobial artificial fingernail which is characterized by kneading an antimicrobial agent into an ABS resin raw material and extruding the pellet into resin pellets.

Description

Antibacterial artificial nail and manufacturing method thereof {ANTIBACTERIAL ARTIFICIAL NAIL AND METHOD FOR PRODUCTION THEREOF}

The present invention relates to an antimicrobial artificial nail and a method of manufacturing the same. More specifically, the present invention relates to a method for producing artificial nails having excellent antimicrobial properties by kneading a graft ABS polymer and an organic / inorganic antimicrobial agent.

Nails are part of the human body that has benefited from the attention of the modern beauty industry. Carefully trimmed and brightly colored, long nails are recognized as an essential beauty factor that doubles the femininity and beauty of modern women. Therefore, the time and effort that modern women spend for the beauty of nails is gradually increasing. However, according to the reality that work is required, it is difficult for many women to grow long nails. That is, in daily life, long nails are easy to break and difficult to manage.

One solution to replacing such long natural nails is to use a cosmetic ornament referred to as artificial nails covering the entire natural nail or forming an extension, or a tip attached to the front end or end of the nail. In general, it is a known technique to attach plastic strips or artificial nails having shapes and sizes similar to long nails to the ends of natural nails with an adhesive.

Many patents relating to such artificial nails are known. U.S. Patent No. 4,920,991 (Shibahashi et al.) Discloses thermochromic artificial nails. U.S. Patent 4,682,612 (Guliano) discloses a method of making artificial nails using an ultraviolet curable coating composition.

In addition, U.S. Patent No. 4,222,399 (Ionesuku) discloses artificial nails attached to a flexible elastic arched frame mounted on a real human nail, while U.S. Patent No. 5,219,645 (Skun) is a fabric matrix with cyanoacrylate. A method for producing artificial nails is disclosed by impregnating and polymerizing.

In addition, US Pat. No. 4,718,957 (Sensenbrenner) describes a method of making recycled artificial nails using a model of a real nail or a real nail and a second substrate and release agent, and US Pat. No. 4,450,848 (Perrigno) A method of making artificial nails comprising a noacrylate adhesive layer, an acrylic acid ester powder layer and a second cyanoacrylate thin layer is disclosed.

Commonly used artificial nails, including those disclosed in the prior art, are produced through an injection molding method using a synthetic resin such as ABS as a raw material. During injection production, high-temperature heat is applied to the raw materials of nails, so that bacteria such as blue mold do not occur. However, consumers of artificial nails do not attach artificial nails only for a short time. Indeed, in the United States, the world's largest market for artificial nails, the tendency of consumers to wear nails is generally one to three days with instant glue, which can be applied for as little as one to three days or as long as about two to three weeks. This is most often the case.

Most of the consumers of artificial nails are women and women who combine household chores and various social life are easily able to penetrate impurities, dust, and moisture between the artificial nails and their natural nails. Bacteria and dust, such as mold, can invade your nails, causing severe damage.

Accordingly, it is an object of the present invention to provide an antimicrobial artificial nail that can prevent bacteria from occurring even after attaching the artificial nail for a long period of two weeks or more.

Another object of the present invention to provide a method for producing such antimicrobial artificial nails.

1 is a view showing the antimicrobial activity test results for the ABS material for antimicrobial artificial nail according to the present invention.

Figure 2 is a view showing the antimicrobial test results of the control sample.

The present invention relates to an artificial nail excellent in antibacterial properties. The antimicrobial artificial nail of the present invention is a raw material obtained by kneading an organic / inorganic antibacterial agent with an acrylonitrile / butadiene / styrene graft copolymer (graft ABS resin) powder obtained by copolymerizing butadiene-based latex with styrene and acrylonitrile. It is produced by injection molding from ABS resin pellets.

The weight of the ABS resin powder present in the raw material of the antimicrobial artificial nail of the present invention is 30 to 50% based on the total weight of the ABS resin pellets.

Organic / inorganic antimicrobial agents used in the present invention include powdered bactericidal and / or antimicrobial fungicides, in particular thiazole sulfurylamide C ₃ H ₃ NS + SO ₂ (NH) ₂ , for example, Haro GDO Japan Applied Chemical Industry Co., Ltd. Such an antimicrobial agent is used in an amount of 3 to 5% based on the total weight of the ABS resin pellet, which is an artificial nail raw material.

In addition to the graft ABS resin, the raw material of the antimicrobial artificial nail of the present invention further includes transparent ABS to obtain transparency of the product. This transparent ABS is manufactured by combining an ABS resin and an acrylic resin. If such transparent ABS is present, the amount is preferably 10 to 25% based on the total weight of the raw materials. In addition, polymer styrene / acrylonitrile (SAN) is added to the graft ABS resin to withstand the excellent moldability and rigidity required for the final use in artificial nail injection molding. The amount of SAN is based on the total weight of the ABS resin pellets. The ratio is 30 to 40%.

In addition, the raw material of the antimicrobial artificial nail of the present invention may further include a conventional additive, for example, a heat stabilizer, the content is 3 to 4%.

Graft ABS resins can be obtained according to conventional methods known in the art. For example, butadiene-based rubber obtained from a butadiene polymerization reactor, that is, polybutadiene latex (PBL) is copolymerized with acrylonitrile and styrene to obtain an ABS copolymer, which is then solidified, and then dehydrated and dried to form an ABS powder. Thereafter, SAN, transparent ABS, antimicrobial agent and stabilizer are added to this powder in the fractions described above to obtain a mixture. Next, the obtained mixture is extruded using a twin screw kneader at 200 ° C to 220 ° C to obtain ABS resin pellets as raw materials.

Typically, artificial nails take the form of sheets or strips formed of an injection molded plastic material that is attached to natural nails by a bottom surface using an adhesive such as an ethylcyanoacrylate-based adhesive. Such injection molding methods are well known in the art. For example, after blending the raw materials as described above, the test materials are injected and then the injection machine mold is closed, a nozzle is injected into the mold, and the raw materials are plasticized by rotating the screw under the injection pressure. . The injection device is then retracted to open the mold and pneumatically sprayed to remove the molded article. In general, artificial nails made of injection-molded plastic material are molded into shapes having various widths corresponding to the width of a human finger. The lower concave surface of the artificial nail tip is matched with the upper convex surface of the natural nail to achieve ideal shape conformity. Has a constant curvature to provide.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the following Examples do not limit the protection scope of the present invention.

Example 1

Polybutadiene rubber, acrylonitrile and styrene were copolymerized in a conventional manner to prepare an ABS copolymer. The copolymer was solidified, dehydrated and dried to form an ABS powder. SAN, transparent ABS, and thiazole sulfurylamide, an antimicrobial agent, were mixed with the powder in the following proportions.

ingredient Volume (% by weight) ABS powder 40 SAN 35 Transparent ABS 20 Antibacterial (thiazole sulfuramide) 5

The resulting mixture was extruded through a twin screw kneader at 200 ° C. to 220 ° C. to obtain ABS resin pellets. This pellet was directly used in the injection molding step as an artificial nail raw material to prepare an antimicrobial artificial nail.

Example 2

In this example, the antimicrobial artificial nail raw material prepared in Example 1 was tested for its antimicrobial activity. The test was conducted at a Japanese food analysis center.

Specimens were taken from ABS for artificial nails containing 5% of the antimicrobial agent obtained in Example 1. The sample surface was lightly wiped with cotton wool soaked with 99.5% (V / V) ethanol, and air dried to prepare a sample. As the test bacteria, Escherichia Coli IFO 3072 (E. coli) was used. The test medium is as follows.

NA Badge: Normal Agar Badge

NB medium: Medium bouillon medium with 0.2% meat extract

1/500 NB medium: NB medium diluted 500-fold with purified water and adjusted to pH 7.0 ± 0.2

SCDLP medium: SCDLP medium (obtained from Nippon Seiyaku Co., Ltd.)

SA Badge: Standard Agar Badge

The bacterial solution was prepared as follows. The test bacteria were incubated in NA medium at 37 ± 1 ° C. for 16 hours to 24 hours, then reinoculated in NA medium and incubated at 37 ± 1 ° C. for 16 to 20 hours. The cultured cells were uniformly dispersed in 1/500 NB medium and prepared so that the number of cells per ml was 2.0 × 10 ⁵ to 1.0 × 10 ^6.

Subsequently, 0.5 ml of E. coli bacteria were added dropwise to the test surface 25 cm ² of the sample, and a polyethylene film was covered thereon and brought into close contact with each other. In addition, a polyethylene film containing no antimicrobial agent was tested in the same manner as a control sample. After 72 hours of storage, the viability of the sample was measured as follows. After 72 hours of storage, viable bacteria were washed out from the samples in 10 ml of SCDLP medium, and the viable counts in this wash solution were measured according to agar plate culture method (35 ± 1 ° C., 2 days culture) using SA medium. It converted into the ratio per sample. In addition, the measurement immediately after inoculation was performed using a control sample.

Table 1 shows the results of measuring the viable cell count of test bacteria dropped on the sample.

Test bacteria sample Number of live bacteria per sample Immediately after inoculation After 25 ℃ / 72 hours Escherichia coli Control sample 2.6 × 10 ⁵ 1.7 × 10 ⁷ Specimen of the Invention 2.6 × 10 ⁵ 3.0 × 10 ⁵

As can be seen from Table 1 and the results shown in FIGS. 1 and 2, the antimicrobial artificial nail material of the present invention showed an excellent antimicrobial activity against Escherichia coli as compared to the control sample containing no antimicrobial agent.

Example 3

In this experimental example, a mold resistance test was performed on the ABS resin which is the raw material of the antimicrobial artificial nail prepared in Example 1 above. The test method was MIL STD 810D Method 508 · 3. The activity of the test bacteria was confirmed by incubation for 10 days before the start of the test.

The test mixture mixed spore suspension was directly inoculated by the wet method. The mixed spore suspension was prepared as follows. Test bacteria are nigrospora ducke (Nigrospora oryzae), Cladosporium herbarumCladosporium herbarum), Trichoderma T-1 (Trichoderma T1), Aspergillus niger (Aspergillus niger), Aspergillus Aurisse (Aspergillus oryzae), Candida albicans (candida albicans), Bacillus subtilis (Bacillus subtillis), Pseudomonas Eruginosa (Pseudomonas aeruginosa), E. coli (Escherichia Coli), Botrytis Cinerea (Botrytis cinerea62 species including food contaminants, allergens, phytopathogenic bacteria and respiratory disorders. The test bacteria were mixed with a surfactant (NaCl, pure water, Tween-80, 1 part test sulphfufumaric acid dioctyl sodium, 10 ml per bacteria) and a wetting agent (concentration 0.05 g / 1000 g). Pipette with Pasteur pipette. Filtration with a glass bead filter. At this time, spores were separated from the fruiting body using an Ellenmeyer flask (one part test bacterium). Spores were dispersed by centrifugation (1 part test bacteria). The fungi were collected in a glass lot and spores were identified in a turbid system. 62 test bacteria were mixed in equal amounts.

As the medium, starch dextrose agar (PDA) to which no antibiotics such as chloramphenicol was added was used, and square shale was used.

The culture period was 28 days, and the incubator and culture conditions were as follows. A circulator with automatic temperature and humidity control was used. The temperature is 30 ° C ± 5 ° C and the temperature at the time of conversion is 24 ° C to 35 ° C. The humidity was 95% ± 5% relative humidity, and at the time of conversion, the relative humidity was 90% or more. The wind speed was 60 cm / sec.

The cotton was immersed in the medium and inoculated under the same conditions as the sample in the circulation apparatus to confirm whether the inside of the circulation apparatus was suitable for the growth of bacteria. The results were evaluated according to the following five levels.

evaluation Germ development Rating 0 No growth of bacteria Rating 1 Slightly developed Evaluation 2 Slight development Evaluation 3 Can identify intermediate development Evaluation 4 Marked development

The results of the evaluation of the growth of bacteria for the antibacterial artificial nail ABS resin of the present invention are shown in Table 2 below.

sample 7 days 14 days 21st 28 days ABS for antibacterial artificial nails 0 0 0 0

As can be seen from these results, the antibacterial artificial nail ABS resin of the present invention showed an excellent growth inhibitory effect against various bacteria.

The present invention provides an artificial fingernail having excellent antibacterial properties such that bacteria such as mold do not occur on the wearer's fingernails even after the artificial fingernail is attached for a long period of two weeks or more. The antimicrobial artificial nail of the present invention can be easily produced by kneading the antimicrobial agent with ABS resin in the artificial nail raw material blending process. In addition, according to the present invention, it is possible to prevent damage to the nail caused by the intrusion of bacteria and dust during long-term attachment of the artificial nail, so that the consumers of the artificial nail market to enjoy a clean living culture to public health Contributes a great deal.

Claims (9)

Acrylonitrile / butadiene / styrene (ABS) graft copolymer resin powder 30-50%, polymer styrene / acrylonitrile (SAN) 30-40%, transparent ABS 10-25% and formula C ₃ H ₃ NS + SO It is injection molded from raw material ABS resin pellets obtained by kneading 2 to 5% of thiazole sulfurylamide antimicrobial agent of ₂ (NH) ₂ , wherein all% are% by weight based on the total weight of ABS resin pellets. Antibacterial artificial nails. delete delete The antimicrobial artificial nail according to claim 1, wherein the ABS resin pellet further comprises 3 to 4% of heat stabilizer, wherein% is based on the total weight of the ABS resin pellet. delete The method of claim 1 wherein the ABS resin pellets are ABS resin powder 40%, SAN 35%, transparent ABS 20% and thiazole sulfurylamide antimicrobial 5% (wherein all% is based on the total weight of the ABS resin pellets) Antimicrobial artificial nails comprising a weight percent). a) copolymerizing butadiene-based latex with styrene and acrylonitrile to obtain acrylonitrile / butadiene / styrene graft copolymer (graft ABS); b) solidifying, dehydrating and drying the graft ABS obtained in step a) to obtain an ABS resin powder; c) adding and mixing the polymer styrene / acrylonitrile (SAN), the transparent ABS and the thiazole sulfurylamide antimicrobial agent of formula C ₃ H ₃ NS + SO ₂ (NH) ₂ to the ABS resin powder; d) extruding the mixture obtained in step c) into resin pellets; And e) injection molding the resin pellets obtained in the step d) to obtain an artificial nail molded article. 8. The method of claim 7, further comprising adding a thermal stabilizer to the ABS resin powder in step c). 9. The method according to claim 7, wherein the extruding step d) is carried out using a twin screw kneader at 200 ° C. to 220 ° C. 10.