KR100833281B1 - Manufacturing process of antibacterial send and it's preparation - Google Patents

Abstract

A method for producing sand for education having an anti-bacterial activity is provided to obtain sand having easy-handling property, workability, hygienic property and three-dimensional display characteristics. A method for producing sand for education having an anti-bacterial activity comprises the steps of: (1) classifying natural sand by rotating the sand in a rotational cylindrical classifying device while applying hot air thereto; (2) further classifying the sand in a rotating circular classifying device with a filter net; (3) heat treated the classified sand in a heater at 300-600 deg.C; (4) mixing distilled water with silver in a weight ratio of 1:0.2-0.3, applying an electric current with a voltage of 5-10V to perform electrolysis and to obtain a nanosilver solution, and mixing the nanosilver solution with a phosphate salt to obtain an antibacterial agent; (5) converting a synthetic resin into a liquid synthetic resin in a hot mixer and mixing the liquid synthetic resin with the antibacterial agent obtained from step (4) to form an antibacterial synthetic resin; (6) spraying the liquid antibacterial synthetic resin to the outer surface of the heat treated sand obtained from step (3), followed by cooling at 20-30 deg.C; carrying out spray coating of the outer surface of the sand obtained from step (6) with microcrystalline wax; (8) agitating and cooling the coated sand at 18-25 deg.C for 10-30 minutes; (9) crushing the coated sand present in the form of clusters; (10) agitating the crushed sand in a hot agitator at 70-80 deg.C, increasing the temperature to 103-115 deg.C and spraying a binder to the sand while agitating the sand; and (11) agitating and cooling the binder-coated sand obtained from step (10) at 18-25 deg.C, wherein the sand classified in steps (1) and (2) has a diameter of 0.05-0.5 mm.

Description

Manufacturing process of sand for learning brain development with antibacterial activity and composition thereofManufacturing process of antibacterial send and it's preparation

The present invention by coating and cooling the antibacterial synthetic resin, wax, binder in sequence after screening and heat treatment of the sand in the natural state, the simplicity that can be used at any time in the room, the work that can be easily done without getting in the hands during work It has hygienicity to prevent contamination by sexual and harmful microorganisms, and expressiveness that can be expressed in three dimensions such as actual shapes, so that young and old can develop brains by improving the cognition, memory and creativity of things. It relates to a method for producing brain development learning sand having an antimicrobial activity and a composition thereof.

Currently, various forms of learning tools are being developed to improve brain development and learning ability for children and adults as well as infants and children. Especially in the case of infants and children, the two-dimensional structure consisting of monotonous components such as letters, numbers and pictures Compared to planar learning tools, hands can directly touch them like blocks and puzzles, and when learning with three-dimensional three-dimensional learning tools consisting of three-dimensional composition, the senses felt by hands and eyes stimulate brain nerves and affect brain development much.

However, the three-dimensional three-dimensional learning tools such as blocks, puzzles, etc. are already formalized, and after a certain period of time, it becomes difficult to get used to infants and children and easily get tired of them as much as they expected the effects on continuous brain development.

Therefore, sand is a material that can be obtained in the natural state while embodying the senses felt by the hands and eyes, while not considering the various experiences through direct experiences and the repetitive learning.

In general, sand does not have a fixed shape, so it can be easily implemented as a user's desired model. Especially, it embodies the perception of objects with the sense of sight and hand with the eyes. It's a great learning tool for developing.

However, such sand cannot be implemented as a user's desired model unless adhesive materials other than natural sand are mixed, and even if mixed with other adhesive materials, the sand is limited to a user's desired model.

In addition, to implement the model using sand is also limited in handling because it is subject to the local restrictions that must be outdoors rather than indoors.

In order to improve such a problem, the Republic of Korea Patent Publication No. 10-2001-0049169 is a coating of a wax (wax) commonly used in the sand with an adhesive, and the Republic of Korea Patent Publication No. 10-2004-0000361 is a mixture of carnauba in the sand After the commonly used beeswax (wax, wax) is coated with an adhesive.

However, the learning sand prepared as described above may be easily modified due to temperature-sensitive adhesives that allow the sand to be bonded to the sand, as well as microorganisms remaining in the hands during the process of modeling the learning sand by hand. Transferred to this sand, the adhesives due to the propagation of microorganisms can rot after prolonged use.

The present invention has been made in view of the above problems, and after screening and heat treatment of the sand in the natural state by sequentially coating and cooling the antimicrobial synthetic resin, wax, binder, simplicity that can be used at any time indoors, hand during work It has a workability that makes it easy to work without questioning, hygiene that prevents contamination by harmful microorganisms, and expressiveness that can be expressed in three dimensions such as the actual shape. And it relates to a method for producing a brain development learning sand having an antibacterial ability to improve brain creativity and its composition.

After the screening and heat treatment of the sand according to the present invention for achieving the above object is coated with antimicrobial synthetic resin, wax, binder sequentially and the method of manufacturing brain development learning sand having a cooling antibacterial power,

A first sand selection step (first step) for sorting sand in a natural state; A second sand selection step (second step) of re-selecting the sand selected in the first step; A heat treatment step (third step) of performing heat treatment at high temperature on the sand selected in the second step; A silver nano water manufacturing process (fourth step) which is prepared by electrolyzing silver in distilled water and mixing phosphate; An antibacterial synthetic resin manufacturing process (fifth step) of mixing the silver nano water prepared in the fourth step with the synthetic resin; An antimicrobial synthetic resin coating step (sixth step) of coating the antimicrobial synthetic resin prepared in the fifth step on the sand heat-treated in the third step; A wax coating step (seventh step) of coating a wax on the outer surface of the sand coated with the antimicrobial synthetic resin in the sixth step; A first cooling step (eighth step) of cooling the wax-coated sand in the seventh step; A crushing step (9th step) of crushing the sand mass generated by cooling in the eighth step; A binder coating step of coating a binder on the sand crushed in the ninth step (step 10); In the tenth step is characterized in that the secondary cooling step (11th step) of cooling the sand coated with the binder.

Method for producing a brain development learning sand having an antimicrobial power and a composition thereof according to the present invention,

Using sand that can be easily bonded in the natural state, it embodies the senses felt by hands and eyes regardless of gender, age, place, or place, and can develop brains through various experiences and repetitive learning through direct experiences.

In addition, it is possible to prevent the adhesive from being easily denatured even at high temperatures, as well as to prevent the degeneration of the adhesive by the microorganisms because it has an antimicrobial activity to the learning sand.

Hereinafter, the configuration of the present invention in detail based on the accompanying drawings.

1 is a process flow diagram schematically showing a method for manufacturing brain development learning sand with antibacterial activity according to the present invention.

The above manufacturing process will be described in more detail as follows.

1. First sand selection process (1st process)

In the process of sorting the sand collected in the natural state,

The sand collected in the natural state is rotated 1 ~ 3 hours at a rotational speed of 100 ~ 200rpm in a rotary cylinder sorter with a 0.3 ~ 0.5mm strainer, and the sand is sorted by applying hot air at 60 ~ 80 ℃.

At this time, the selected sand is discharged to the outside by the rotary cylinder separator, the diameter of the discharged sand is less than 0.3 ~ 0.5mm.

Using a rotary cylinder sorter with a 0.3 ~ 0.5mm strainer, sand collected in nature is not composed of a certain size, but it is composed of a mixture of foreign substances such as branches and blades of grass. At the same time to remove foreign matter.

In addition, applying hot air using a hot air blower has a certain moisture, so that the sand is not only combined with each other, but also with sand and other foreign matters, so that the sand is not sorted smoothly in the sand selection process. For sake.

2. Second Sand Selection Process (2nd Process)

In the process of screening the first screened sand again in the first step,

In the first step, the first screened sand is rotated for 30 to 60 minutes at a rotational speed of 400 to 600 rpm in a rotary circle sorter having a strainer having a diameter of 0.05 to 0.1 mm to sort sand.

At this time, the selected sand is inside the rotary cylinder separator, and the diameter of the sand inside the rotary cylinder separator is more than 0.05 ~ 0.1mm.

At this time, the diameter of the sand selected sequentially in the first step and the second step is characterized in that the 0.05 ~ 0.5mm.

Preferably, the diameter of the selected sand is 0.1-0.3 mm.

The selected sand is 0.05 ~ 0.5mm because the selected sand is discharged to the outside from the rotary circular sorter of the primary sand sorting process and then sorted again by the rotary circular sorter of the secondary sand sorting process.

In addition, by rotating the rotary circle selector at 400 ~ 600rpm to polish the sand with a circular outer surface into a circular sand, not only can be smoothly coated in the following coating process, but also feel good to touch.

3. Heat treatment process (3rd process)

In the process of heat-treated at high temperature sand selected in the second step,

In the second step, the second screened sand is heat-treated for 10 to 30 minutes in a heater at 300 to 600 ° C.

The heat treatment of the selected sand at high temperature is not only to remove the fragile sand such as foreign matter or silica which could not be removed in the first and second sand selection processes, but also to sterilize the microorganisms remaining in the sand collected in the natural state. .

4. Silver Nano Water Manufacturing Process (4th Process)

In the process of electrolyzing silver and mixing phosphate,

Pure silver (銀, solid content 99.99%) is mixed with 1: 0.2 ~ 0.3 by weight in middle water (DW), and then electrolyzed for 15 ~ 25 hours by applying a current of 5 ~ 10V at 5 ~ 10 ℃. After the solution is produced, a process of mixing 1: 0.05 to 0.1 by weight of phosphate in a nano silver solution.

Phosphate mixed in nano silver solution is produced by reducing ammonium phosphate produced by reacting ammonium phosphate with ammonium molybdate to tin tin chloride, which has the effect of inhibiting and sterilizing the production of bacteria such as Escherichia coli. It is used as a raw material for preservatives and fertilizers for storage.

5. Antibacterial synthetic resin manufacturing process (5th process)

In the process of manufacturing by mixing the antibacterial agent in the synthetic resin,

After the synthetic resin is introduced into a heat mixer, the heat is applied to deform into a liquid synthetic resin, and the antimicrobial agent prepared in the fourth step is mixed at a weight of 1: 0.2 to 0.5 by weight.

In this case, the synthetic resin used is polyethylene (PE), polypropylene (PP), polystyrene (Polystylene), polyvinyl chloride (Polyvinyl chloride) is used, either of which is selected or used It is characterized by using the above mixture.

More preferably, polyethylene and polypropylene are used, and either one of them is used or mixed.

In order to transform the synthetic resin into a liquid phase in the heat mixer, heat is applied to the heat mixer according to the specific melting temperature of the heat mixer.

In addition, a specific color of the final composition may be obtained by adding a pigment of a specific color to the synthetic resin.

6. Antibacterial synthetic resin coating process (6th process)

In the process of coating the antibacterial synthetic resin on the outer surface of the selected sand,

After spraying the liquid antimicrobial synthetic resin prepared in the fifth step to the outer surface of the sand heat-treated in the third step using a spraying device is a coating step of cooling in a cooler of 20 ~ 30 ℃.

At this time, the thickness of the antimicrobial synthetic resin coated on the heat-treated sand is characterized in that 0.005 ~ 0.02mm.

As such, the thickness of the antimicrobial synthetic resin coated on sand is 0.005 ~ 0.02mm, when the thickness of the antimicrobial synthetic resin coated on the heat treated sand is less than 0.005mm, the antimicrobial power of the antimicrobial synthetic resin is insignificant, and the thickness is greater than 0.02mm. In this case, the particles are so large that they feel heterogeneous when they touch them.

7. Wax coating process (7th process)

In the process of coating the binder on the sand coated with antimicrobial synthetic resin,

In the sixth step, a coating process is performed by spraying liquid microcrystallin wax (microcrystallin-wax) on the outer surface of the sand coated with the antimicrobial synthetic resin by using a spray device on the sand coated with the antimicrobial synthetic resin.

At this time, the thickness of the microcrystalline wax coated on the outer surface of the sand coated with the antimicrobial synthetic resin is characterized in that 0.01 ~ 0.02mm.

As such, the use of microcrystalline wax is not limited to the melting point (40 to 70 ° C.) of commonly used waxes such as natural wax, ceresin wax, and ozokerite. Due to the high 75 ~ 115 ℃, not only the hand temperature (34 ~ 42 ℃) but also the internal temperature (25 ~ 80 ℃, especially 60 ~ 80 ℃ in hot summer days) ) Can prevent the wax from melting.

In addition, when the wax coated on the sand is melted, the final product is deformed to cause decay due to the infiltration of foreign substances and microorganisms, which may cause severe odor and denaturation.

8. 1st cooling process (8th process)

In the process of cooling sand coated with microcrystalline wax,

In the seventh step, the microcrystalline wax-coated sand is cooled while stirring for 10-30 minutes in a stirring cooler at 18-25 ° C.

In this way, the stirring cooler is used to cool and coat the microcrystalline wax coated on the sand, and at the same time, to prevent the sand from being combined with each other in the cooling process.

9. Shredding process (9th process)

In the process of crushing the microcrystalline wax-coated sand while being cooled using a crusher,

In the eighth process, the microcrystalline wax-coated sand is combined with each other using a crusher to crush some of the microcrystalline wax-coated sand, which is lumped together, using a crusher.

As described above, the microcrystalline wax-coated sand is cooled by the stirring cooler in the eighth process, but the microcrystalline wax-coated sand is combined with each other to form agglomerates in the final process. This is to maintain a constant size using a crusher because the size is not kept constant.

However, at this time, if the microcrystalline wax coated sand formed in the lump due to the microcrystalline wax is crushed by a crusher, the lump formed in the microcrystalline wax coated sand is separated from each other and at the same time the microcrystalline wax coated on the sand The outer surface becomes rough.

10. Binder coating process (10th process)

A process of coating a binder on crushed microcrystalline wax-coated sand

After stirring the microcrystalline wax coated crushed sand in the ninth step in a thermal stirrer of 70 ~ 80 ℃ for 10 to 30 minutes, the temperature of the thermal stirrer to 103 ~ 115 ℃ and spraying the binder using a spray device And while stirring for 3 to 5 minutes.

At this time, the binder used is characterized in that the use of silicone oil.

As such, raising the temperature of the heat stirrer to 103 to 115 ° C. after stirring in a heat stirrer at 70 ° C. to 80 ° C. not only prevents the microcrystalline wax from which the outer surface is roughened from melting completely but also coarser micro Only the outer surface of the crystallin wax is formed in a half-liquid state to smooth the outer surface through stirring to smoothly coat the binder.

In addition, the thickness of the binder coated on the outer surface of the microcrystalline wax is characterized in that the 0.01 ~ 0.02mm.

11. Second Cooling Process

To cool the sand coated with the binder

In the tenth step, the binder-coated sand is cooled while stirring for 10-30 minutes in a stirring cooler of 18 ~ 25 ℃.

The cooling using the stirring cooler as described above is to prevent the antibacterial synthetic resin and wax coated on the outer surface of the sand from being combined with each other while the binder is cooled in the cooling process to form agglomerates.

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are only intended to specifically illustrate the present invention, it is obvious to those skilled in the art that the scope of the present invention is not limited. That is, simple modifications or changes of the present invention can be easily carried out by those skilled in the art, and all such modifications or changes can be seen to be included in the scope of the present invention.

Example: Learning sand made according to the present invention

The sand collected in the natural state is rotated for 2 hours at 150rpm in a rotary cylinder sorter with a 0.4mm strainer, and after applying hot air at 70 ° C, the sand discharged to the outside from the rotary cylinder sorter is again rotated with a 0.1mm strainer. Rotate the cylinder at 500 rpm for 45 minutes and heat the sand inside the rotary cylinder at the 500 ℃ heater for 20 minutes.

After mixing 20kg of silver to 100ℓ of distilled water and applying 7V current at 7 ℃, 10kg of phosphate was mixed to prepare silver nano water, and 30kg of the prepared silver nano water was 100kg of liquid polyethylene (PE). It is mixed to prepare an antimicrobial synthetic resin.

Spray the liquid antimicrobial synthetic resin on the heated sand using a sprayer, cool it using a cooler at 25 ° C, spray microcrystalline wax on the outer surface of the sand coated with the antimicrobial synthetic resin using a sprayer, and 20 ° C. Cool with stirring for 20 minutes in a stirring cooler.

After crushing the cooled sand with microcrystallin coating using a crusher, the crushed microcrystallin coated sand was stirred for 20 minutes in a 75 ℃ heat stirrer and the temperature was raised to 103 ~ 115 ℃, and then liquid The silicone oil is sprayed and stirred for 4 minutes and cooled with stirring for 20 minutes in a stirring cooler at 20 ° C.

Comparative Example: Learning Sand Made by a Common Method

The sand collected in the natural state is rotated for 2 hours at 150 rpm in a rotary cylinder sorter with a 0.4 mm strainer, and then rotated at 500 rpm for 45 minutes in a rotary cylinder sorter with a 0.1 mm strainer. After spraying paraffin wax, spray liquid paraffin oil and cool.

Experiment 1: Anion Release Experiment

The amount of anions released in the examples and comparative examples was tested.

Item Negative ion emission amount (ION / cc) Experiment method Example 74 KICM-FIR-1042 Comparative example -

As shown in Table 1, by measuring the anion release amount of the Example and the anion release amount of the Comparative Example through the anion release amount experiment (KICM-FIR-1042) in the Example, but the anion is released, in the Comparative Example In the examples, it can be seen that it has an antimicrobial activity.

Experiment 2: Antimicrobial Activity

The experimental bacteria were incubated at 34-36 ° C. and RH 85-95% for 24 hours to determine the number of bacteria.

At this time, the added strains are Staphylococcus aureus ATCC 6538, Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, the concentration of each strain Staphylococcus 1.3 ± 0.3 × 105 / ㎖, Escherichia coli 1.6 ± 0.3 x 10 5 / ml, Pseudomonas aeruginosa 1.2 ± 0.3 x 10 5 / ml, and the surface area of the sample was set to 25 cm 3.

Experimental method carried out contains 0.5% by weight yeast extract, 0.5% by weight malt extract, 1% by weight peptone, 2% by weight dextrose, 5% by weight agar, 91% by weight purified water, pH 4 ~ After adjusting to 6.5 and inoculating each of the sand of Example and sand of Comparative Example 1: 0.5 by weight to the solid medium mixed with Staphylococcus, E. coli, Pseudomonas aeruginosa and fermented for 24 hours in a fermentor at 32 ℃.

The results of measuring the bacterial reduction rate in Examples and Comparative Examples as described above are shown in Table 2 below.

Target strain Experiment item Example mixed sheet Comparative example mixed sheet Staphylococcus Initial bacterial count 1.3 × 10 ⁵ 1.3 × 10 ⁵ 24 hours later Less than 10 6.1 × 10 ⁶ Bacterial reduction rate 99.9 - Escherichia coli Initial bacterial count 1.6 × 10 ⁵ 1.6 × 10 ⁵ 24 hours later Less than 10 7.7 × 10 ⁶ Bacterial reduction rate 99.9 - Pseudomonas aeruginosa Initial bacterial count 1.2 × 10 ⁵ 1.2 × 10 ⁵ 24 hours later Less than 10 5.3 × 10 ⁶ Bacterial reduction rate 99.9 -

As shown in Table 2, although the number of bacteria increased significantly after 24 hours in the sheet mixed with the comparative example, it can be seen that almost all the bacteria disappear in the mixed sheet.

6 to 11 show photographs of the results of the experiment.

6 and 7 are Staphylococcus aureus, Figs. 8 and 9 are Escherichia coli, and Figs. 10 and 11 are samples added with Pseudomonas aeruginosa.

Commonly, bacteria are marked with white dots in the sample, while in FIG. 7, FIG. 9, and FIG. 11, which are tested as comparative examples, white dots are prominently displayed, while FIGS. 6, 8, and FIG. In FIG. 10, white spots are not seen at all, indicating that almost all bacteria have disappeared.

Experiment 3: Sensory Test

Sensory test personnel measured sensory tests such as stickiness, foreign body, aroma, and overall preference. The measured results are shown in Table 3.

Sensory evaluation was performed on a 9-point scale by 30 sensory test personnel who had sensory test experience for more than two years (15 adult males and 15 females).

division Sticky Foreign body incense Overall preference Example 6.9 7.5 8.4 8.5 Comparative example 7.2 8.6 7.5 7.2

As shown in Table 3, the Example has a low stickiness and a sense of foreign matter compared to the comparative example, and has a high aroma and overall preference.

There is a feeling of stickiness and foreign matter due to the negative feeling of the touch, it can be seen that the comparative example compared to the embodiment is not only a good feeling of touching the hand but also emits a bad smell.

1 is a manufacturing process chart showing a method for manufacturing brain development learning sand with antibacterial activity according to the present invention.

Figure 2 is a cross-sectional view showing the brain development learning sand with antibacterial power prepared according to the present invention.

Figure 3 is a cross-sectional view showing a state of combining the brain development learning sand with antibacterial power produced in accordance with the present invention.

Figure 4 is a cross-sectional view showing the brain development learning sand produced by a general method.

Figure 5 is a cross-sectional view showing a state in which the brain development learning sand produced by the general method combined with each other.

Figure 6 is a photograph showing the state after staphylococcus aureus cultured for 24 hours on a sheet mixed with a brain development learning sand with antibacterial activity prepared according to the present invention.

FIG. 7 is a photograph showing the state after staphylococcus aureus cultured for 24 hours on a sheet mixed with brain learning learning sand prepared according to a general method.

8 is a photograph showing the state after E. coli cultured for 24 hours in a sheet mixed with a brain development learning sand with antibacterial activity prepared according to the present invention.

FIG. 9 is a photograph showing the state after E. coli was cultured for 24 hours on a sheet mixed with brain learning learning sand prepared according to a general method.

Figure 10 is a photograph showing the state after the cultivation of Pseudomonas aeruginosa for 24 hours on a sheet mixed with the brain development learning sand with antibacterial activity prepared according to the present invention.

FIG. 11 is a photograph showing the state after culturing Pseudomonas aeruginosa for 24 hours on a sheet mixed with brain learning learning sand prepared according to a general method.

Claims (8)

delete The primary sand which sorts sand by applying hot air of 60 ~ 80 ℃ at the time of rotation of 100 ~ 200rpm at the speed of 100 ~ 200rpm in the rotary cylinder sorter with 0.3 ~ 0.5mm strainer. A sorting step (first step); Secondary sand sorting process (second process) for sorting the sand by rotating the sand selected primarily in the first step 30 ~ 60 minutes at a rotational speed 400 ~ 600rpm in a rotary circular sorter formed with a strainer of 0.05 ~ 0.1mm and ; A heat treatment step (third step) of heat-treating the sand selected in the second step for 10 to 30 minutes in a heater at 300 to 600 ° C .; Pure silver (銀, solid content 99.99%) is mixed with 1: 0.2 ~ 0.3 by weight in middle water (DW), and then electrolyzed for 15 ~ 25 hours by applying a current of 5 ~ 10V at 5 ~ 10 ℃. A silver nano water manufacturing process (fourth step) of mixing the phosphate 1: 0.05 to 0.1 with respect to the nano silver solution after producing a solution; An antimicrobial synthetic resin manufacturing process (fifth step) of mixing the antimicrobial agent prepared in the fourth step by 1: 0.2 to 0.5 with respect to the weight after deforming the synthetic resin into a liquid synthetic resin by adding heat to the thermomixer; The antimicrobial synthetic resin coating step (sixth step) of spraying the liquid antimicrobial synthetic resin prepared in the fifth step to the outer surface of the sand heat-treated in the third step using a spray device and then cooled in a cooler of 20 ~ 30 ℃ ; Wax coating process of coating a wax by spraying a liquid microcrystallin-wax on the outer surface of the sand coated with the antimicrobial synthetic resin using a spray device on the sand coated with the antimicrobial synthetic resin in the sixth step. (Seventh step); A first cooling step (8th step) of cooling the microcrystalline wax-coated sand in the seventh step with stirring for 10-30 minutes in a stirring cooler at 18-25 ° C .; The crushing step (9th step) of crushing the microcrystalline wax-coated sand, which is cooled in the eighth step and combined with each other using a crusher, to crush some of the microcrystalline wax-coated sand, which is agglomerates, using a crusher; ; After stirring the microcrystalline wax coated crushed sand in the ninth step in a thermal stirrer of 70 ~ 80 ℃ for 10 to 30 minutes, the temperature of the thermal stirrer to 103 ~ 115 ℃ and spraying the binder using a spray device And binder coating step (10th step) and stirred for 3 to 5 minutes at the same time; In the manufacturing method of the sand comprising a secondary cooling step (11th step) of cooling the binder coated sand in the tenth step while stirring for 10-30 minutes in a stirring cooler of 18 ~ 25 ℃, Sand of the first step and the second step selected in sequence the diameter of the brain development learning sand with antimicrobial power, characterized in that 0.05 ~ 0.5mm. The primary sand which sorts sand by applying hot air of 60 ~ 80 ℃ at the time of rotation of 100 ~ 200rpm at the speed of 100 ~ 200rpm in the rotary cylinder sorter with 0.3 ~ 0.5mm strainer. A sorting step (first step); Secondary sand sorting process (second process) for sorting the sand by rotating the sand selected primarily in the first step 30 ~ 60 minutes at a rotational speed 400 ~ 600rpm in a rotary circular sorter formed with a strainer of 0.05 ~ 0.1mm and ; A heat treatment step (third step) of heat-treating the sand selected in the second step for 10 to 30 minutes in a heater at 300 to 600 ° C .; Pure silver (銀, solid content 99.99%) is mixed with 1: 0.2 ~ 0.3 by weight in middle water (DW), and then electrolyzed for 15 ~ 25 hours by applying a current of 5 ~ 10V at 5 ~ 10 ℃. A silver nano water manufacturing process (fourth step) of mixing the phosphate 1: 0.05 to 0.1 with respect to the nano silver solution after producing a solution; An antimicrobial synthetic resin manufacturing process (fifth step) of mixing the antimicrobial agent prepared in the fourth step by 1: 0.2 to 0.5 with respect to the weight after deforming the synthetic resin into a liquid synthetic resin by adding heat to the thermomixer; The antimicrobial synthetic resin coating step (sixth step) of spraying the liquid antimicrobial synthetic resin prepared in the fifth step to the outer surface of the sand heat-treated in the third step using a spray device and then cooled in a cooler of 20 ~ 30 ℃ ; Wax coating process of coating a wax by spraying a liquid microcrystallin-wax on the outer surface of the sand coated with the antimicrobial synthetic resin using a spray device on the sand coated with the antimicrobial synthetic resin in the sixth step. (Seventh step); A first cooling step (8th step) of cooling the microcrystalline wax-coated sand in the seventh step with stirring for 10-30 minutes in a stirring cooler at 18-25 ° C .; The crushing step (9th step) of crushing the microcrystalline wax-coated sand, which is cooled in the eighth step and combined with each other using a crusher, to crush some of the microcrystalline wax-coated sand, which is agglomerates, using a crusher; ; After stirring the microcrystalline wax coated crushed sand in the ninth step in a thermal stirrer of 70 ~ 80 ℃ for 10 to 30 minutes, the temperature of the thermal stirrer to 103 ~ 115 ℃ and spraying the binder using a spray device And binder coating step (10th step) and stirred for 3 to 5 minutes at the same time; In the manufacturing method of the sand comprising a secondary cooling step (11th step) of cooling the binder coated sand in the tenth step while stirring for 10-30 minutes in a stirring cooler of 18 ~ 25 ℃, The synthetic resin used in the fifth process uses polyethylene (PE), polypropylene (PP), polystyrene (Polystylene), polyvinyl chloride (Polyvinyl chloride), or any one selected from Method for producing a brain learning learning sand having an antimicrobial power, characterized in that used by mixing two or more. The primary sand which sorts sand by applying hot air of 60 ~ 80 ℃ at the time of rotation of 100 ~ 200rpm at the speed of 100 ~ 200rpm in the rotary cylinder sorter with 0.3 ~ 0.5mm strainer. A sorting step (first step); Secondary sand sorting process (second process) for sorting the sand by rotating the sand selected primarily in the first step 30 ~ 60 minutes at a rotational speed 400 ~ 600rpm in a rotary circular sorter formed with a strainer of 0.05 ~ 0.1mm and ; A heat treatment step (third step) of heat-treating the sand selected in the second step for 10 to 30 minutes in a heater at 300 to 600 ° C .; Pure silver (銀, solid content 99.99%) is mixed with 1: 0.2 ~ 0.3 by weight in middle water (DW), and then electrolyzed for 15 ~ 25 hours by applying a current of 5 ~ 10V at 5 ~ 10 ℃. A silver nano water manufacturing process (fourth step) of mixing the phosphate 1: 0.05 to 0.1 with respect to the nano silver solution after producing a solution; An antimicrobial synthetic resin manufacturing process (fifth step) of mixing the antimicrobial agent prepared in the fourth step by 1: 0.2 to 0.5 with respect to the weight after deforming the synthetic resin into a liquid synthetic resin by adding heat to the thermomixer; The antimicrobial synthetic resin coating step (sixth step) of spraying the liquid antimicrobial synthetic resin prepared in the fifth step to the outer surface of the sand heat-treated in the third step using a spray device and then cooled in a cooler of 20 ~ 30 ℃ ; Wax coating process of coating a wax by spraying a liquid microcrystallin-wax on the outer surface of the sand coated with the antimicrobial synthetic resin using a spray device on the sand coated with the antimicrobial synthetic resin in the sixth step. (Seventh step); A first cooling step (8th step) of cooling the microcrystalline wax-coated sand in the seventh step with stirring for 10-30 minutes in a stirring cooler at 18-25 ° C .; The crushing step (9th step) of crushing the microcrystalline wax-coated sand, which is cooled in the eighth step and combined with each other using a crusher, to crush some of the microcrystalline wax-coated sand, which is agglomerates, using a crusher; ; After stirring the microcrystalline wax coated crushed sand in the ninth step in a thermal stirrer of 70 ~ 80 ℃ for 10 to 30 minutes, the temperature of the thermal stirrer to 103 ~ 115 ℃ and spraying the binder using a spray device And binder coating step (10th step) and stirred for 3 to 5 minutes at the same time; In the manufacturing method of the sand comprising a secondary cooling step (11th step) of cooling the binder coated sand in the tenth step while stirring for 10-30 minutes in a stirring cooler of 18 ~ 25 ℃, The thickness of the antimicrobial synthetic resin coated on the sand (third process) heat-treated in the sixth step is 0.005 ~ 0.02mm The method of manufacturing brain development learning sand with antimicrobial power, characterized in that. The primary sand which sorts sand by applying hot air of 60 ~ 80 ℃ at the time of rotation of 100 ~ 200rpm at the speed of 100 ~ 200rpm in the rotary cylinder sorter with 0.3 ~ 0.5mm strainer. A sorting step (first step); Secondary sand sorting process (second process) for sorting the sand by rotating the sand selected primarily in the first step 30 ~ 60 minutes at a rotational speed 400 ~ 600rpm in a rotary circular sorter formed with a strainer of 0.05 ~ 0.1mm and ; A heat treatment step (third step) of heat-treating the sand selected in the second step for 10 to 30 minutes in a heater at 300 to 600 ° C .; Pure silver (銀, solid content 99.99%) is mixed with 1: 0.2 ~ 0.3 by weight in middle water (DW), and then electrolyzed for 15 ~ 25 hours by applying a current of 5 ~ 10V at 5 ~ 10 ℃. A silver nano water manufacturing process (fourth step) of mixing the phosphate 1: 0.05 to 0.1 with respect to the nano silver solution after producing a solution; An antimicrobial synthetic resin manufacturing process (fifth step) of mixing the antimicrobial agent prepared in the fourth step by 1: 0.2 to 0.5 with respect to the weight after deforming the synthetic resin into a liquid synthetic resin by adding heat to the thermomixer; The antimicrobial synthetic resin coating step (sixth step) of spraying the liquid antimicrobial synthetic resin prepared in the fifth step to the outer surface of the sand heat-treated in the third step using a spray device and then cooled in a cooler of 20 ~ 30 ℃ ; Wax coating process of coating a wax by spraying a liquid microcrystallin-wax on the outer surface of the sand coated with the antimicrobial synthetic resin using a spray device on the sand coated with the antimicrobial synthetic resin in the sixth step. (Seventh step); A first cooling step (8th step) of cooling the microcrystalline wax-coated sand in the seventh step with stirring for 10-30 minutes in a stirring cooler at 18-25 ° C .; The crushing step (9th step) of crushing the microcrystalline wax-coated sand, which is cooled in the eighth step and combined with each other using a crusher, to crush some of the microcrystalline wax-coated sand, which is agglomerates, using a crusher; ; After stirring the microcrystalline wax coated crushed sand in the ninth step in a thermal stirrer of 70 ~ 80 ℃ for 10 to 30 minutes, the temperature of the thermal stirrer to 103 ~ 115 ℃ and spraying the binder using a spray device And binder coating step (10th step) and stirred for 3 to 5 minutes at the same time; In the manufacturing method of the sand comprising a secondary cooling step (11th step) of cooling the binder coated sand in the tenth step while stirring for 10-30 minutes in a stirring cooler of 18 ~ 25 ℃, The thickness of the microcrystalline wax coated on the outer surface of the sand (sixth step) in the seventh process is a method for manufacturing brain development learning sand with antibacterial activity, characterized in that 0.01 ~ 0.02mm. The primary sand which sorts sand by applying hot air of 60 ~ 80 ℃ at the time of rotation of 100 ~ 200rpm at the speed of 100 ~ 200rpm in the rotary cylinder sorter with 0.3 ~ 0.5mm strainer. A sorting step (first step); Secondary sand sorting process (second process) for sorting the sand by rotating the sand selected primarily in the first step 30 ~ 60 minutes at a rotational speed 400 ~ 600rpm in a rotary circular sorter formed with a strainer of 0.05 ~ 0.1mm and ; A heat treatment step (third step) of heat-treating the sand selected in the second step for 10 to 30 minutes in a heater at 300 to 600 ° C .; Pure silver (銀, solid content 99.99%) is mixed with 1: 0.2 ~ 0.3 by weight in middle water (DW), and then electrolyzed for 15 ~ 25 hours by applying a current of 5 ~ 10V at 5 ~ 10 ℃. A silver nano water manufacturing process (fourth step) of mixing the phosphate 1: 0.05 to 0.1 with respect to the nano silver solution after producing a solution; An antimicrobial synthetic resin manufacturing process (fifth step) of mixing the antimicrobial agent prepared in the fourth step by 1: 0.2 to 0.5 with respect to the weight after deforming the synthetic resin into a liquid synthetic resin by adding heat to the thermomixer; The antimicrobial synthetic resin coating step (sixth step) of spraying the liquid antimicrobial synthetic resin prepared in the fifth step to the outer surface of the sand heat-treated in the third step using a spray device and then cooled in a cooler of 20 ~ 30 ℃ ; Wax coating process of coating a wax by spraying a liquid microcrystallin-wax on the outer surface of the sand coated with the antimicrobial synthetic resin using a spray device on the sand coated with the antimicrobial synthetic resin in the sixth step. (Seventh step); A first cooling step (8th step) of cooling the microcrystalline wax-coated sand in the seventh step with stirring for 10-30 minutes in a stirring cooler at 18-25 ° C .; The crushing step (9th step) of crushing the microcrystalline wax-coated sand, which is cooled in the eighth step and combined with each other using a crusher, to crush some of the microcrystalline wax-coated sand, which is agglomerates, using a crusher; ; After stirring the microcrystalline wax coated crushed sand in the ninth step in a thermal stirrer of 70 ~ 80 ℃ for 10 to 30 minutes, the temperature of the thermal stirrer to 103 ~ 115 ℃ and spraying the binder using a spray device And binder coating step (10th step) and stirred for 3 to 5 minutes at the same time; In the manufacturing method of the sand comprising a secondary cooling step (11th step) of cooling the binder coated sand in the tenth step while stirring for 10-30 minutes in a stirring cooler of 18 ~ 25 ℃, The binder used in the tenth step is a method for producing brain learning brain sand with antibacterial activity, characterized in that using the silicone oil. The primary sand which sorts sand by applying hot air of 60 ~ 80 ℃ at the time of rotation of 100 ~ 200rpm at the speed of 100 ~ 200rpm in the rotary cylinder sorter with 0.3 ~ 0.5mm strainer. A sorting step (first step); Secondary sand sorting process (second process) for sorting the sand by rotating the sand selected primarily in the first step 30 ~ 60 minutes at a rotational speed 400 ~ 600rpm in a rotary circular sorter formed with a strainer of 0.05 ~ 0.1mm and ; A heat treatment step (third step) of heat-treating the sand selected in the second step for 10 to 30 minutes in a heater at 300 to 600 ° C .; Pure silver (銀, solid content 99.99%) is mixed with 1: 0.2 ~ 0.3 by weight in middle water (DW), and then electrolyzed for 15 ~ 25 hours by applying a current of 5 ~ 10V at 5 ~ 10 ℃. A silver nano water manufacturing process (fourth step) of mixing the phosphate 1: 0.05 to 0.1 with respect to the nano silver solution after producing a solution; An antimicrobial synthetic resin manufacturing process (fifth step) of mixing the antimicrobial agent prepared in the fourth step by 1: 0.2 to 0.5 with respect to the weight after deforming the synthetic resin into a liquid synthetic resin by adding heat to the thermomixer; The antimicrobial synthetic resin coating step (sixth step) of spraying the liquid antimicrobial synthetic resin prepared in the fifth step to the outer surface of the sand heat-treated in the third step using a spray device and then cooled in a cooler of 20 ~ 30 ℃ ; Wax coating process of coating a wax by spraying a liquid microcrystallin-wax on the outer surface of the sand coated with the antimicrobial synthetic resin using a spray device on the sand coated with the antimicrobial synthetic resin in the sixth step. (Seventh step); A first cooling step (8th step) of cooling the microcrystalline wax-coated sand in the seventh step with stirring for 10-30 minutes in a stirring cooler at 18-25 ° C .; The crushing step (9th step) of crushing the microcrystalline wax-coated sand, which is cooled in the eighth step and combined with each other using a crusher, to crush some of the microcrystalline wax-coated sand, which is agglomerates, using a crusher; ; After stirring the microcrystalline wax coated crushed sand in the ninth step in a thermal stirrer of 70 ~ 80 ℃ for 10 to 30 minutes, the temperature of the thermal stirrer to 103 ~ 115 ℃ and spraying the binder using a spray device And binder coating step (10th step) and stirred for 3 to 5 minutes at the same time; In the manufacturing method of the sand comprising a secondary cooling step (11th step) of cooling the binder coated sand in the tenth step while stirring for 10-30 minutes in a stirring cooler of 18 ~ 25 ℃, The thickness of the binder coated on the outer surface of the microcrystalline wax in the tenth step is a method for manufacturing brain development learning sand with antibacterial activity, characterized in that 0.01 ~ 0.02mm. delete

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