KR20220080763A - A composition for a highly elastic antibacterial film, a manufacturing method thereof, a highly elastic antibacterial film using the same, a beauty pack comprising the highly elastic antibacterial film - Google Patents

Abstract

The present invention relates to a composition for a high elastic antibacterial film, a method for manufacturing the same, a high elastic antibacterial film using the same, and a cosmetic pack comprising the high elastic antibacterial film, and more particularly, the composition for a high elastic antibacterial film of the present invention is a polymer resin and ethylene vinyl acetate When the calcium oxide powder obtained by calcining shellfish and the compatibilizing agent are mixed in an optimized ratio in the matrix resin containing the resin and applied as a highly elastic antibacterial film for cosmetic packs, the elasticity and mechanical strength such as elasticity and restoring force are remarkably excellent. In addition, it can have excellent antibacterial activity against E. coli and Staphylococcus aureus.

Description

A composition for a highly elastic antibacterial film, a manufacturing method thereof, a highly elastic antibacterial film using the same, and a cosmetic pack comprising the highly elastic antibacterial film {A composition for a highly elastic antibacterial film, a manufacturing method thereof, a highly elastic antibacterial film using the same, a beauty pack comprising the highly elastic antibacterial film}

The present invention relates to a composition for a highly elastic antibacterial film, a manufacturing method thereof, a highly elastic antibacterial film using the same, and a cosmetic pack comprising the highly elastic antibacterial film.

The keratin is the outermost layer of the skin, and when keratinocytes are first formed, they have a nucleus as a living cell, but as time goes by and the cell differentiation process, the nucleus disappears and loses moisture and becomes a flat dead cell (keratin). . In particular, as the feet of the human body are exposed to a humid environment caused by sweat, etc., an environment is created that is easy for bacteria to grow, causing diseases such as ringworm (dermatophytosis), candidiasis, and colic. Among them, ringworm has enzymes that can dissolve keratin, so it reproduces using keratin as nutrients.

In order to remove these dead skin cells, it is cumbersome to mainly remove them using a towel or a dead skin remover. There are disadvantages. In addition, in the case of cosmetic packs such as existing hand packs and foot care packs, products are produced larger than actual feet, and since the cosmetic pack must be fixed using a separate fixture, the process cost and product production cost are high. In addition, cosmetic packs do not have good elasticity such as elasticity and resilience, and nutrients are not absorbed well, so nutrition supply is insufficient. In addition, there is a problem that the moisturizing power is significantly lowered due to exposure to the cosmetic nutrient solution, and the daily life is impossible because it is uncomfortable to wear.

On the other hand, cosmetic packs processed in the market are produced by two processing methods: iron mold and casting mold. In the case of an iron mold, since the mold blade is thick, it is impossible to form a clean shape with a wide thickness at the bonding part, and since it takes a long time to preheat the mold, if the blade is made thin, thermal deformation occurs and it cannot be used, and low and high temperature control is difficult. It is difficult, and there is a problem that the entire mold needs to be replaced in case of damage. In addition, in the case of casting molds, since the entire mold must be NC and precision processed with an aluminum mold, the manufacturing cost is high, and there is a problem of severe thermal deviation because the entire mold is heated by inserting a heater in a fixed place. In addition, if the mold blade is thinned, thermal bridges with the film occur in an instant, increasing the defect rate, making it difficult to make various shapes, and in case of damage, the entire mold must be replaced.

Therefore, it is necessary to develop a new cosmetic pack material that can remove dead skin cells and inhibit the growth of bacteria while improving the low elasticity and moisturizing power of existing cosmetic packs and uncomfortable fit.

Korean Patent Registration No. 10-1113196

In order to solve the above problems, an object of the present invention is to provide a composition for a high-elasticity antibacterial film having outstanding antibacterial activity as well as remarkably excellent mechanical properties such as elasticity, restoring force, and tensile strength.

Another object of the present invention is to provide a high-elasticity antibacterial film prepared by using a composition for a high-elasticity antibacterial film.

Another object of the present invention is to provide a cosmetic pack comprising the high-elasticity antibacterial film.

Another object of the present invention is to provide a method for preparing a composition for a highly elastic antibacterial film.

Another object of the present invention is to provide a method for manufacturing a highly elastic antibacterial film.

The present invention relates to 100 parts by weight of a matrix resin in which a polymer resin and an ethylene vinyl acetate resin are mixed in a weight ratio of 55:45 to 15:85, 1 to 5 parts by weight of calcium oxide powder obtained by calcining shellfish, and 0.1 to 0.1 to compatibilizer It provides a composition for a highly elastic antibacterial film comprising 3 parts by weight.

In addition, the present invention provides a high-elasticity antibacterial film prepared by using the composition for the high-elasticity antibacterial film.

In addition, the present invention is the high elasticity antibacterial film; and an acid component essence coated on one surface of the highly elastic antibacterial film.

In addition, the present invention comprises the steps of calcining and pulverizing shellfish to prepare a calcium oxide powder; preparing a matrix resin by mixing a polymer resin and an ethylene vinyl acetate resin in a weight ratio of 55:45 to 15:85; and preparing a composition for a highly elastic antibacterial film by mixing 1 to 5 parts by weight of the calcium oxide powder and 0.1 to 3 parts by weight of a compatibilizer to 100 parts by weight of the matrix resin; do.

In addition, the present invention comprises the steps of preparing a masterbatch by introducing the composition for high elasticity antibacterial film into a twin-screw extruder; And after blow-extruding the masterbatch, manufacturing a high-elasticity antibacterial film by a hot wire molding method; provides a method for producing a high-elasticity antibacterial film comprising a.

The composition for high elasticity antibacterial film according to the present invention is a high elasticity antibacterial film for cosmetic packs by mixing calcium oxide powder obtained by calcining shellfish and a compatibilizer in an optimized ratio in a matrix resin containing a polymer resin and ethylene vinyl acetate resin. When applied, not only elasticity and mechanical strength such as elasticity and restoring force are remarkably excellent, but also can have excellent antibacterial activity against E. coli and Staphylococcus aureus.

The effects of the present invention are not limited to the above-mentioned effects. It should be understood that the effects of the present invention include all effects that can be inferred from the following description.

1 is a view showing the results of physical property evaluation of the tensile strength (a) and yield strength (b) of the highly elastic antibacterial films prepared in Examples 1 to 3 and Comparative Examples 1 to 7 according to the present invention.
2 is a view showing the results of evaluation of physical properties of the elongation (a) and elastic modulus (b) of the high elastic antibacterial films prepared in Examples 1 to 3 and Comparative Examples 1 to 7 according to the present invention.
3 is a tensile-stress strain curve (UTM) of the high elastic antibacterial films prepared in Examples 4 to 9 and Comparative Examples 8 and 9 according to the present invention.
Figure 4 is a physical property evaluation of the tensile strength (a), yield strength (b), elongation (c) and elastic modulus (d) of the high elastic antibacterial films prepared in Examples 4 to 9 and Comparative Examples 8 and 9 according to the present invention; A drawing showing the results.
5 shows FTIR analysis results for pure LDPE, pure EVA, pure EVA/LDPE, and Examples 7 to 9 according to the present invention.
6 is a tensile-stress strain curve (UTM) of the high elastic antibacterial films prepared in Examples 10 and 11 and Comparative Examples 10 to 17 according to the present invention.
7 shows the results of measurement of antibacterial properties of the highly elastic antibacterial films prepared in Examples 10, 12, 13 and Comparative Example 14 according to the present invention.
8 is a result of comparative analysis of a conventional product and a product of the present invention for a cosmetic pack.

Hereinafter, the present invention will be described in more detail by way of one embodiment.

The present invention relates to a composition for a highly elastic antibacterial film, a manufacturing method thereof, a highly elastic antibacterial film using the same, and a cosmetic pack comprising the highly elastic antibacterial film.

As described above, existing cosmetic packs such as hand packs or foot care packs have poor elasticity, such as elasticity and resilience, and lack of nutrient supply due to poor absorption of cosmetic nutrients. There is a problem of creating an easy environment. In order to improve this, a solution casting method or a method of coating an antibacterial material on a highly elastic film was used, but these methods have problems in that productivity and economic feasibility are deteriorated, and harmful substances are emitted.

Therefore, in the present invention, calcium oxide powder obtained by calcining shellfish in a matrix resin containing a polymer resin and ethylene vinyl acetate resin and a compatibilizer are mixed in an optimized ratio to prepare a composition for a highly elastic antibacterial film, and it can be applied to a cosmetic pack. In this case, elasticity and mechanical strength such as elasticity and restoring force are remarkably excellent as well as excellent antibacterial activity against E. coli and Staphylococcus aureus.

Specifically, the present invention relates to 100 parts by weight of a matrix resin in which a polymer resin and an ethylene vinyl acetate resin are mixed in a weight ratio of 55:45 to 15:85, 1 to 5 parts by weight of a calcium oxide powder obtained by calcining shellfish, and a compatibilizer It provides a composition for a highly elastic antibacterial film comprising 0.1 to 3 parts by weight.

In the matrix resin, the polymer resin and the ethylene vinyl acetate resin are in a weight ratio of 55:45 to 15:85, preferably 40:60 to 17:83 by weight, more preferably 30:70 to 19:81 by weight, most preferably It may be in a weight ratio of 22:78 to 20:80. In particular, if the content of the ethylene vinyl acetate resin is less than 45 weight ratio, impact resistance such as elasticity and restoring force may be sharply lowered and may not reach the expected level, and if it exceeds 85 weight ratio, tracking resistance and mechanical strength may be reduced. .

The polymer resin is low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), high crystallinity polypropylene (HIPP), poly It may be at least one selected from the group consisting of vinyl alcohol (PVA), polyhydroxybutyrate (PHB), polylactic acid (PLA), polycaprolactone (PCL), and polyvinyl chloride (PVC). Preferably, it may be at least one selected from the group consisting of low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE) and high-density polyethylene (HDPE), and most preferably, low-density polyethylene (LDPE).

The ethylene vinyl acetate resin is a polymer obtained by copolymerizing an ethylene vinyl acetate monomer, and as the content of vinyl acetate increases, the density may increase, while the degree of crystallinity decreases and flexibility increases. The ethylene vinyl acetate resin may form a matrix resin together with the polymer resin to remarkably improve impact resistance and tracking resistance at low temperatures.

The calcium oxide powder is obtained by calcining shellfish at a high temperature. During calcination, calcium carbonate (CaCO ₃ ), which is a main component, may be converted into calcium oxide (CaO). The calcium oxide powder is environmentally friendly by calcining shellfish obtained from nature, and has excellent stability and antibacterial activity.

The shellfish may be at least one selected from the group consisting of oyster shells, petrified shells, abalone shells, oyster shells, clam shells, scallop shells, pearl oyster shells and cockle shells. Preferably, it may be at least one selected from the group consisting of oyster shells, petrified shells and abalone shells, and most preferably oyster shells.

The calcium oxide powder may have an average particle diameter of 2 to 30 μm, preferably 15 to 28 μm, more preferably 22 to 26 μm, and most preferably 23 to 25 μm. At this time, when the average particle diameter of the calcium oxide powder is less than 2 μm, the powder size is too small to agglomerate with each other and dispersibility may be reduced. It may not be good.

The calcium oxide powder may be 1 to 5 parts by weight, preferably 2 to 4 parts by weight, more preferably 2.3 to 3.7 parts by weight, and most preferably 2.8 to 3.2 parts by weight based on 100 parts by weight of the matrix resin. At this time, if the content of the calcium oxide powder is less than 1 part by weight, the antibacterial property may be rapidly reduced, and conversely, if it exceeds 5 parts by weight, the antibacterial property is excellent, but dispersibility and mechanical strength with the matrix resin may be reduced.

The compatibilizer may be mixed to increase the miscibility of the calcium oxide powder with the matrix resin, and to improve elastic recovery and mechanical strength. Specific examples of the compatibilizer include maleic anhydride grafted polyethylene (PE-g-MAH), maleic anhydride grafted polypropylene (PP-g-MAH), maleic anhydride grafted ethylene butyl acrylate (EBA-g-MAH), Maleic anhydride grafted styrene ethylene butylene styrene block copolymer (SEBS-g-MAH), maleic anhydride grafted ethylene-propylene rubber (EPR-g-MAH), styrene maleic anhydride (SMA) and glycidyl methacrylate meta It may be at least one selected from the group consisting of acrylate-grafted ethylene methyl acrylate (EMA-g-GMA).

The compatibilizer may be 0.1 to 3 parts by weight, preferably 0.5 to 2 parts by weight, more preferably 0.7 to 1.5 parts by weight, and most preferably 0.9 to 1.1 parts by weight based on 100 parts by weight of the matrix resin. If the content of the compatibilizer is less than 0.1 parts by weight, miscibility between the matrix resin and the calcium oxide powder may be poor, and on the contrary, if it exceeds 3 parts by weight, mechanical properties of tensile strength, yield strength and elongation may be significantly reduced. .

The composition for high elasticity antibacterial film may have excellent antibacterial activity against Escherichia coil and Staphylococcus aureus by including calcium oxide powder.

In particular, although not explicitly described in the following Examples or Comparative Examples, in the composition for a high elasticity antibacterial film according to the present invention, a high elasticity antibacterial film was prepared by using the composition for a high elasticity antibacterial film prepared by changing the above six conditions. manufactured, applied to a foot exfoliating pack and worn on the feet for 15 to 20 minutes, and then the fit and the keratin status of the feet after 24 hours, whether or not bacteria are generated, and the moisturizing power were evaluated. As the evaluation criteria, the effect of improving the feeling of use and the condition of the feet was tested based on 20 women in their 20s and 50s without any skin disease.

As a result, unlike in other conditions and in other numerical ranges, when all of the following conditions were satisfied, the pack was evaluated as having excellent elasticity and very comfortable to wear, and had excellent durability with respect to antibacterial and moisturizing power, and no bacterial growth occurred. Through this, it was confirmed that the keratinocytes on the feet fell off after using the exfoliating pack, making them smooth, and the moisturizing effect was maintained for a long time even after 24 hours with the supply of cosmetic nutrients.

① With respect to 100 parts by weight of the matrix resin in which the polymer resin and the ethylene vinyl acetate resin are mixed in a weight ratio of 22:78 to 20:80, ② 2.8 to 3.2 parts by weight of the calcium oxide powder and 0.9 to 1.1 parts by weight of a compatibilizer, ③ the polymer resin is low-density polyethylene (LDPE), ④ the shellfish is an oyster shell, ⑤ the calcium oxide powder has an average particle diameter of 23 to 25 μm, ⑥ the compatibilizer is maleic anhydride graft polyethylene (PE-g) -MAH).

However, when any one of the above six conditions was not satisfied, the antibacterial durability was very low and thus ineffective, and the elasticity of the matrix resin was not good, so that the wearing comfort was deteriorated.

On the other hand, the present invention provides a high-elasticity antibacterial film prepared by using the composition for the high-elasticity antibacterial film.

In addition, the present invention is the high elasticity antibacterial film; and an acid component essence coated on one surface of the highly elastic antibacterial film.

The acid component essence may be at least one selected from the group consisting of alpha-hydroxy acid (α-hydroxyacid, AHA), beta-hydroxy acid (β-hydroxy acid, BHA) and glycolic acid (gkycolic acid, TCA). .

The cosmetic pack may be a foot exfoliating pack, a mask pack, a hand pack, a nail pack, a calf pack, or a hair pack.

In addition, the present invention comprises the steps of preparing a calcium oxide powder by calcining and pulverizing shellfish; preparing a matrix resin by mixing a polymer resin and an ethylene vinyl acetate resin in a weight ratio of 55:45 to 15:85; and preparing a composition for a highly elastic antibacterial film by mixing 1 to 5 parts by weight of the calcium oxide powder and 0.1 to 3 parts by weight of a compatibilizer to 100 parts by weight of the matrix resin; do.

Washing after removing foreign substances from the shellfish before the step of preparing the calcium oxide powder; and drying the washed shellfish at 100 to 110° C. for 30 minutes to 2 hours.

In the step of preparing the calcium oxide powder, calcination is performed at a temperature of 800 to 1100 °C for 20 to 28 hours, preferably at 850 to 1000 °C for 22 to 26 hours, most preferably at 940 to 960 °C for 23 to 25 hours. can be done At this time, if the calcination temperature is less than 800 °C or the calcination time is less than 20 hours, the shellfish are not calcined properly, and calcium carbonate (CaCO ₃ ), which is the main component of the shell, may not be sufficiently converted into calcium oxide (CaO). Conversely, if the calcination temperature is higher than 1100 ℃ or the calcination time exceeds 28 hours, calcium carbonate (CaCO ₃ ) is carbonized without being converted to calcium oxide (CaO) due to excessive calcination of shellfish, and antibacterial and mechanical properties may be significantly reduced. have.

In addition, the present invention comprises the steps of preparing a masterbatch by introducing the composition for the high elasticity antibacterial film into a twin-screw extruder; And after blow-extruding the masterbatch, manufacturing a high-elasticity antibacterial film by a hot wire molding method; provides a method for producing a high-elasticity antibacterial film comprising a.

In the step of preparing the high-elasticity antibacterial film, blow extrusion can produce a primary film using a T-die, and produce a secondary film using a ring die. Then, the secondary film may be stretched by a hot wire-forming method to form a highly elastic antibacterial film.

As described above, the conventional iron mold method has a disadvantage in that the temperature control is not performed well due to the continuous heating method. Only when instantaneous heat is achieved, the adhesion and sealing properties of the product are improved. The casting heater method is accurate in instantaneous heat generation and temperature control, but it has the disadvantage of high manufacturing cost because NC processing or precision processing is required, and there was a problem in that it was difficult to make a complex shape. Accordingly, the method of manufacturing the high elasticity antibacterial film of the present invention can process a high elastic material by using the hot wire forming method, and it is easy to manufacture complex shapes, and the adhesion and sealing can be cleaned by the instantaneous heating or instant cooling system. There is this.

Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited by the following examples.

Examples 1 to 9 and Comparative Examples 1 to 9: Preparation of high elasticity antibacterial film

After removing foreign substances from the oyster shell using a scrubber, the salt was removed by precipitating it in distilled water for 2-3 days. The washed oyster shells were dried at 105° C. for 24 hours. Oyster shells were incinerated at 950 °C for 6 hours. The calcined oyster shell was pulverized to a size of 23-25 μm using mechanical friction to obtain calcium oxide powder, which is an oyster shell powder (OSP).

A matrix resin was prepared by mixing low-density polyethylene (LDPE) and ethylene vinyl acetate (EVA) in the ratio shown in Table 1 below. Then, 100 parts by weight of the matrix resin was mixed with the calcium oxide powder in the ratio shown in Table 1 to prepare a composition for a high elasticity antibacterial film. Then, the composition was put into a twin screw extruder, and a master batch was prepared. Then, the film was extruded by blow extrusion using the master batch. Then, the extruded film was molded into a highly elastic antibacterial film using a hot wire-forming method. In this case, in the blow extrusion, a primary film was prepared using a Ti-die, and then a secondary film was manufactured using a ring die.

Experimental Example 1: Evaluation of mechanical properties according to the mixing ratio of PE and EVA

The mechanical properties of tensile strength, yield strength, elongation and modulus of elasticity were evaluated using the highly elastic antibacterial films prepared in Examples 1 to 3 and Comparative Examples 1 to 7. At this time, the mechanical properties were tested by using a universal property tester (UTM) to prepare a specimen in Type IV according to ASTM-D638-3 (Standard Test Method for Tensile Properties of Plastics). Each experiment was repeated 5 times, and this was expressed as variance. The results are shown in Table 2 and FIGS. 1 and 2 below.

For the evaluation of mechanical properties, tensile strength is a value obtained by dividing the maximum tensile load until fracture of the specimen by the cross-sectional area of the test specimen, which represents the maximum load that can be supported in a unit area. Yield strength means the limit stress at which elastic deformation occurs. This can be seen as the load when the deformation begins to occur. For high elasticity, the value of yield strength is important. When the external stress exceeds the yield strength, the product loses its restoring properties.

In addition, elongation indicates the percentage of the original length after measuring the maximum length before the specimen is broken. The modulus of elasticity represents the deformation with respect to the stress that occurs inside the material. The larger this value, the less likely the deformation will occur. The larger the modulus of elasticity, the harder it can be seen as a material that is hard to deform. In particular, when applied for a foot pack, a modulus of elasticity that is not too large for wearing is required, but a large modulus of elasticity is required for manufacturing a foot pack. An appropriate modulus of elasticity should be applied to the film.

1 is a view showing the results of physical property evaluation of the tensile strength (a) and yield strength (b) of the high-elasticity antibacterial films prepared in Examples 1 to 3 and Comparative Examples 1 to 7 above.

2 is a view showing the results of evaluation of physical properties of the elongation (a) and elastic modulus (b) of the high elastic antibacterial films prepared in Examples 1 to 3 and Comparative Examples 1 to 7;

Referring to Table 2 and FIGS. 1 and 2, there was no significant difference in tensile strength except for Comparative Examples 1, 2 and 6. In the case of yield strength, Example 3 showed the best yield strength, and secondly, it was confirmed that Examples 1 and 2 had excellent yield strength. These results showed that the compatibility between the non-polar low-density polyethylene and the polar ethylene vinyl acetate was poor, which affected the strength of the film. That is, in the case of Examples 1 to 3, as the vinyl acetate group of EVA increased, the chemical bonding was enhanced to improve the yield strength, but in Comparative Examples 6 and 7, the content of LDPE lacking elasticity compared to EVA decreased. It was found that the resistance to deformation was lowered.

On the other hand, in the case of elongation, although the elongation increased in Comparative Example 2 (EVA 10 wt%), it decreased sharply in Comparative Example 2 (EVA 20 wt%), and then showed a continuous increase trend. This means that when the EVA content is 10% by weight (Comparative Example 2), the low content of vinyl acetate can increase the elongation by enhancing the chemical bonding between PE and EVA, but when it is 20% by weight (Comparative Example 3), the It was found that as the content increased, the elongation decreased due to the miscibility problem of PE and EVA. In addition, after Comparative Example 3, the elongation was increased as the EVA content was increased, and it was found that this was a result of the content of EVA having excellent compatibility and elongation.

The modulus of elasticity decreased as the EVA content increased. It can be seen that this is a result of the increase in the content of EVA, which is more flexible than PE. In particular, in the case of Comparative Example 2 (EVA 10% by weight), it was found that the result was due to a decrease in strength due to a problem of miscibility.

Combining these mechanical property results, it was found that the compositions of Examples 1 to 3 were suitable for high elasticity, and in particular, Example 3 had the most excellent properties of high elasticity.

Experimental Example 2: Evaluation of mechanical properties according to the content of calcium oxide powder

The mechanical properties of tensile strength, yield strength, elongation, and modulus of elasticity were evaluated in the same manner as in Experimental Example 1 using the highly elastic antibacterial films prepared in Examples 4 to 9 and Comparative Examples 8 and 9. The results are shown in Table 3 and FIGS. 3 and 4 below.

3 is a tensile-stress strain curve (UTM) of the high elastic antibacterial films prepared in Examples 4 to 9 and Comparative Examples 8 and 9. Referring to FIG. 3 , in the case of Examples 4 to 9, which did not contain calcium oxide powder at all, as compared to Comparative Examples 8 and 9, tensile and stress strain were relatively low, so the decrease in mechanical strength was generally low. could see that In particular, in the case of Examples 7 to 9, when the calcium oxide powder was mixed with the matrix resin of LDPE (20%)/EVA (80%), the decrease in mechanical strength was small, which indicates that the miscibility with the calcium oxide powder was poor. meant excellent.

Figure 4 shows the results of evaluation of properties of tensile strength (a), yield strength (b), elongation (c) and elastic modulus (d) of the high-elasticity antibacterial films prepared in Examples 4 to 9 and Comparative Examples 8 and 9; It is a drawing.

Referring to Table 3 and Figure 4, in the case of tensile strength, the composition of PE (20%)/EVA (80%) showed overall higher tensile strength than PE (50%)/EVA (50%), and oxidation As the content of calcium powder increased, the tensile strength decreased. In particular, in the case of Examples 7 to 9 corresponding to PE (20%)/EVA (80%), the tensile strength gradually decreased until the content of calcium oxide powder was 3 parts by weight, but at 5 parts by weight, the tensile strength slightly increased. confirmed that These results showed that the interaction between the calcium oxide powders was enhanced as the content of the calcium oxide powder increased.

In the case of yield strength, it was confirmed that PE (20%)/EVA (80%) was more dominant in all composition ratios. Also, like the tensile strength, the content of calcium oxide powder decreased up to 3 parts by weight, but it was confirmed that it was significantly increased at 5 parts by weight.

In the case of elongation, it was confirmed that PE (20%)/EVA (80%) was more dominant in all composition ratios. Also, it decreased as the content of the calcium oxide powder increased, and in particular, in Example 5 (PE (50%)/EVA (50%)), there was a sharp decrease trend, which means that the calcium oxide powder was not evenly dispersed in the polymer matrix. Therefore, it was found that the mechanical strength was lowered. On the other hand, in the case of Examples 7 to 9 corresponding to PE (20%)/EVA (80%), the decrease in elongation was very low, and it was confirmed that, in particular, in Example 8, the elongation was superior to that of general PE.

Combining these results, in the case of Example 8 (PE (20%)/EVA (80%), 3 parts by weight of calcium oxide powder), the mechanical properties were the most uniformly excellent, and the physical properties suitable for application to a foot exfoliating pack It was confirmed that all of them were satisfied.

Experimental Example 3: Antimicrobial evaluation

FTIR was performed on the high elastic antibacterial films prepared in Examples 7 to 9 and Comparative Example 9 for antibacterial testing and compatibility with the mattress resin and calcium oxide powder. At this time, the antimicrobial test was measured according to JIS Z 2081:2000 (Antimicrobial products-Test for antimicrobial activity and efficacy) standard. Each experiment was repeated 3 times, and this was expressed as R (%), which is the antibacterial action value. In addition, FTIR (Fourier transform infrared) was measured using the attenuated total reflection (ATR) mode of the Spectrum 65 FT-IR spectrometer (PerkinElmer Co., Ltd., MA., Waltham, USA). The results are shown in Table 4 and Figure 5 below.

According to the results of Table 4, referring to Examples 7 to 9 and Comparative Example 9, it was confirmed that the antibacterial properties were improved as the content of the calcium oxide powder increased, but it was confirmed that it was not strong enough for practical use. It was found that the cause of these results was poor aggregation and dispersibility due to the low miscibility of the calcium oxide powder and the polymer matrix resin.

5 shows FTIR analysis results for pure LDPE, pure EVA, pure EVA/LDPE, and Examples 7 to 9. The FTRF analysis of FIG. 6 was measured to confirm the miscibility of the matrix resin and the calcium oxide powder. Referring to this, there was no significant spectral change in each spectral graph. These results showed that the calcium oxide powder did not induce a chemical bond in the matrix resin, but was only physically dispersed. That is, it was found that only the addition of the calcium oxide powder can lead to deterioration of physical properties such as lowering of dispersibility, mechanical strength, and antibacterial properties.

Examples 10 to 13 and Comparative Examples 10 to 17: Preparation of high elasticity antibacterial film

Calcium oxide powder and matrix resin, which are oyster shell powder (OSP), were prepared in the same manner as in Example 1, respectively. Then, calcium oxide powder and a compatibilizer, PE-g-MA, were mixed in the matrix resin in the ratio shown in Table 5 to prepare a composition for a high elasticity antibacterial film. The composition for high elasticity antibacterial film was extruded and hot wire-molded in the same manner as in Example 1 to prepare a highly elastic antibacterial film.

Experimental Example 4: Evaluation of mechanical properties according to the content of compatibilizer

The mechanical properties of tensile-stress strain, tensile strength, yield strength, elongation and modulus of elasticity were evaluated in the same manner as in Experimental Example 1 using the high elastic antibacterial films prepared in Examples 10 and 11 and Comparative Examples 10 to 17. . The results are shown in Tables 6, 7 and 6 below.

6 is a tensile-stress strain curve (UTM) of the high elastic antibacterial films prepared in Examples 10 and 11 and Comparative Examples 10 to 17.

Referring to Tables 6, 7 and 6, in the case of Comparative Examples 10 to 13, the mechanical strength of the calcium oxide powder was slightly decreased at 1 part by weight, but gradually increased in 3 parts by weight and 5 parts by weight. It was found that the calcium oxide powder was able to partially reinforce the mechanical strength as it increased.

In addition, in Comparative Examples 14 to 16, when the content of the compatibilizer, PE-g-MA, was 1 part by weight, tensile strength, yield strength, and elongation were increased, and the elastic modulus was decreased. This means that PE-g-MA can make the film flexible and strong by increasing the miscibility of LDPE and EVA. On the other hand, it was confirmed that when PE-g-MA was added in excess of 3 parts by weight or more, the mechanical strength was lowered.

In addition, when comparing Examples 10 to 13 and Comparative Examples 17 to 19, when the content of PE-g-MA is 1 part by weight, the strongest mechanical strength is exhibited, whereas when it exceeds 3 parts by weight, the mechanical strength is lowered. confirmed that. In particular, in the case of Example 10, it was found that the mechanical properties of tensile strength, yield strength, elongation and elastic modulus were most evenly excellent.

Experimental Example 5: Antimicrobial evaluation

An antimicrobial test was performed in the same manner as in Experimental Example 3 on the high elastic antibacterial films prepared in Examples 10, 12, 13 and Comparative Example 14, and the results are shown in FIG. 7 .

7 shows the results of measuring the antimicrobial properties of the high elastic antibacterial films prepared in Examples 10, 12, 13 and Comparative Example 14. Referring to FIG. 7 , in the case of Examples 10, 12, and 13, E. coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) exhibited antibacterial activity of 94% or more, respectively. In particular, it was confirmed that Examples 12 and 13 exhibited excellent antibacterial activity of 99% or more.

As such, when the mechanical properties and antibacterial properties were evaluated, it was found that Example 10 had the most suitable antibacterial activity and mechanical properties for application as a high-elastic antibacterial film for cosmetic packs.

Experimental Example 6: Preparation of beauty packs

The alpha-hydroxy acid, which is an acid component essence, was coated on the entire surface of the high elastic antibacterial film prepared in Example 10, and a cosmetic pack for a hand pack and a foot pack was prepared by a conventional method, and then compared with the conventional product, The results are shown in FIG. 8 .

8 is a result of comparative analysis of a conventional product and a product of the present invention for a cosmetic pack. Referring to FIG. 8 , in the case of a conventional product, since the size of the product is large compared to the size of a general hand and foot, it is necessary to use a sticker to fix the product, which shows that it is inconvenient in daily life. On the other hand, in the case of the product of the present invention, since the product size of the hand pack and the foot pack is reduced and has high elasticity, it is stretched to fit the size of the hand and foot, so there is an advantage that the use of a sticker is unnecessary and daily life is free. In addition, it shows that the essence can be absorbed smoothly because it is tightly fitted to the hands and feet due to its high elasticity.

Claims (14)

Based on 100 parts by weight of the matrix resin in which the polymer resin and the ethylene vinyl acetate resin are mixed in a weight ratio of 55:45 to 15:85,
A composition for a highly elastic antibacterial film comprising 1 to 5 parts by weight of calcium oxide powder obtained by calcining shellfish and 0.1 to 3 parts by weight of a compatibilizer.
According to claim 1,
The polymer resin is low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE), polyethylene terephthalate (PET), polypropylene (PP), polystyrene (PS), high crystallinity polypropylene (HIPP), poly Vinyl alcohol (PVA), polyhydroxybutyrate (PHB), polylactic acid (PLA), polycaprolactone (PCL) and polyvinyl chloride (PVC) composition for a high elasticity antibacterial film of at least one selected from the group consisting of.
According to claim 1,
The shellfish is at least one selected from the group consisting of oyster shells, petrified shells, abalone shells, oyster shells, clams shells, scallop shells, pearl oyster shells and cockle shells.
According to claim 1,
The calcium oxide powder has an average particle diameter of 2 to 30 μm, a composition for high elasticity antibacterial film.
According to claim 1,
The compatibilizer is maleic anhydride grafted polyethylene (PE-g-MAH), maleic anhydride grafted polypropylene (PP-g-MAH), maleic anhydride grafted ethylene butyl acrylate (EBA-g-MAH), maleic anhydride grafted styrene ethylene butylene styrene block copolymer (SEBS-g-MAH), maleic anhydride grafted ethylene-propylene rubber (EPR-g-MAH), styrene maleic anhydride (SMA) and glycidyl methacrylate methacrylate graft A composition for a highly elastic antibacterial film that is at least one selected from the group consisting of ethylene methyl acrylate (EMA-g-GMA).
According to claim 1,
The composition for high elasticity antibacterial film is a composition for high elasticity antibacterial film that has antibacterial activity against Escherichia coil and Staphylococcus aureus .
According to claim 1,
Based on 100 parts by weight of the matrix resin in which the polymer resin and the ethylene vinyl acetate resin are mixed in a weight ratio of 22:78 to 20:80, 2.8 to 3.2 parts by weight of the calcium oxide powder and 0.9 to 1.1 parts by weight of a compatibilizer,
The polymer resin is low density polyethylene (LDPE),
The shellfish is an oyster shell,
The calcium oxide powder has an average particle diameter of 23 to 25 μm,
The compatibilizer is maleic anhydride graft polyethylene (PE-g-MAH), the composition for high elasticity antibacterial film.
A highly elastic antibacterial film prepared by using the composition for a highly elastic antibacterial film according to any one of claims 1 to 7.
The highly elastic antibacterial film of claim 8; and an acid component essence coated on one surface of the highly elastic antibacterial film.
10. The method of claim 9,
The acid component essence is at least one selected from the group consisting of alpha-hydroxy acid (α-hydroxyacid, AHA), beta-hydroxy acid (β-hydroxy acid, BHA) and glycolic acid (gkycolic acid, TCA) beauty pack.
10. The method of claim 9,
The cosmetic pack is a foot exfoliating pack, a mask pack, a hand pack, a nail pack, a calf pack, or a hair pack.
calcining and pulverizing the shellfish to prepare a calcium oxide powder;
preparing a matrix resin by mixing a polymer resin and an ethylene vinyl acetate resin in a weight ratio of 55:45 to 15:85; and
preparing a composition for a highly elastic antibacterial film by mixing 1 to 5 parts by weight of the calcium oxide powder and 0.1 to 3 parts by weight of a compatibilizer to 100 parts by weight of the matrix resin;
A method for producing a composition for a highly elastic antibacterial film comprising a.
13. The method of claim 12,
In the step of preparing the calcium oxide powder, the calcination is performed at a temperature of 800 to 1100 °C for 20 to 28 hours.
The step of preparing a masterbatch by adding the composition for a highly elastic antibacterial film of claim 12 or 13 to a twin-screw extruder; and
manufacturing a high-elasticity antibacterial film by hot wire molding after blow-extruding the masterbatch;
A method of manufacturing a highly elastic antibacterial film comprising a.

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