Manufacturing method of environment-friendly crayon capable of showing multiple colors

Abstract

The present invention relates to a method for manufacturing an eco-friendly crayon capable of expressing a plurality of colors, and more particularly, to a crayon base manufacturing step for manufacturing a crayon base by mixing a carnauba wax, a microcrystalline wax, a dye, and a surfactant, and a crayon raw material mixing step, mixing the crayon fragments and liquid paraffin with the crayon base manufactured by the base manufacturing step; and a compression molding step in which the mixture prepared by the raw material mixing step is compression-molded, and the molded article is heated. The compression molding step comprises a heating step and a coating agent coating step in which a coating agent is applied to the molded article heated by the heating step. The crayon produced by the process can simultaneously show a plurality of colors, and due to the use of natural wax components, the crayon is environment-friendly, is not sticky to hands when in use, can be prevented from being smeared or generating powder after being used, and has excellent antibacterial performance.

Description

Technical Field

[0001] The present invention relates to a method for manufacturing an eco-friendly crayon capable of expressing multiple colors. More specifically, it can express multiple colors simultaneously, is environmentally friendly not only because it uses natural wax components, but also has good environmental protection properties. The present invention relates to a method for manufacturing a crayon that can express multiple colors, has excellent antibacterial properties, and inhibits diffusion or powder generation. Background Art

[0002] A crayon is a coloring tool for drawing, used to draw or color a desired picture by rubbing on paper such as drawing paper. These crayons are usually made of clay, chalk, graphite, pigments, beeswax, etc., and may be in the shape of small prisms or cylinders, and can be classified into colored crayons and chalk crayons according to their uses. At the same time, among colored crayons, students can use crayons when drawing.

[0003] Generally speaking, the manufacturing method of crayons is to mix pigments with paraffin wax or wood wax, melt them and then solidify them. More specifically, fats and waxes are put into a double kiln, melted by steam heating, mixed evenly, and then various pigments and extender pigments are added in small amounts, ground with wax, mixed evenly, and then put into a mold and slowly cooled to make.

[0004] However, in the past, crayons have always had problems because they contain heavy metals such as lead and cadmium, or contain hazardous chemicals. Especially, sometimes babies put crayons into their mouths to suck or chew, so it is difficult to produce eco-friendly crayons. This is what we require for crayons.

[0005] For example, past crayons were manufactured using paraffin wax as the main raw material, but these paraffin wax raw materials sometimes contain harmful components or toxic substances. So when crayons come into contact with the skin, the harmful components or toxic substances will be absorbed into the skin, causing skin irritation. There is a problem of causing or having an adverse impact on health.

[0006] In addition, traditional crayons can only express a single color, with limited expressiveness. Not only are they easy to stick to the hands and inconvenient to use, but also bacteria are easy to breed when used by multiple people, and it is easy to spread or scatter powder after use, which is problematic.

[0007] Prior Art Documents

[0008] Patent Documents

[0009] Patent Document 1: Korean Patent Publication No. 10-20100077513 (July 8, 2010).

[0010] Patent Document 2: Korean Patent Publication No. 10-20230087227 (June 16, 2023). Summary of the Invention

[0011] Problems to be Solved by the Invention

[0012] The object of the present invention is to simultaneously exhibit multiple colors and adopt natural wax components, which are not only environmentally friendly but also non-sticky during use, prevent smearing or powdering after application, and provide products with excellent antibacterial properties in a variety of ways. The aim is to provide a method for manufacturing a crayon capable of expressing colors.

[0013] Method for Solving the Problems

[0014] The object of the present invention is a step for manufacturing a crayon base, which prepares a crayon base by mixing 100 parts by weight of carnauba wax, 80 to 120 parts by weight of microcrystalline wax, 5 to 10 parts by weight of pigment, and 0.1 to 0.5 parts by weight. Raw material mixing process: Mix 50 - 70 parts by weight of crayon chips of a color different from that of the crayon base material, 5 - 10 parts by weight of liquid paraffin, and 100 parts by weight of crayon. The crayon base material is the crayon base material prepared through the base material manufacturing process. The mixture prepared through the raw material mixing process consists of a compression molding process for compression molding, a heating process for heating the molded body manufactured through the compression molding process, and a coating process. Apply 0.5 to 1 part by weight of a coating agent to 100 parts by weight of the molded product heated through the heating step. Manufacture crayon fragments by compressing and then pulverizing a mixture of 100 parts by weight of carnauba wax, 80 to 120 parts by weight of microcrystalline wax, 5 - 10 parts by weight of pigment, and 0.1 - 0.5 parts by weight of surfactant. This is achieved by providing a method for manufacturing an environmentally friendly crayon capable of expressing colors.

[0015] According to a preferred feature of the present invention, in the raw material mixing step, relative to 100 parts by weight of the crayon base, it further contains 0.1 to 0.3 parts by weight of a natural antibacterial agent, and the natural antibacterial agent consists of the following components: one or more selected from artemisia essential oil and cypress essential oil.

[0016] According to a more preferred feature of the present invention, the surfactant is manufactured by mixing a phosphate ester or fatty acid ester with an HLB (hydrophilic-lipophilic balance) value of 6 to 14 and a phosphate ester or fatty acid ester with an HLB value of 15 to 19.

[0017] According to a more preferred feature of the present invention, the heating step is carried out at a temperature of 110 to 130 °C for 5 to 10 minutes.

[0018] According to an even more preferred feature of the present invention, the coating agent is made of polyvinylpyrrolidone.

[0019] Advantages of the Invention

[0020] The manufacturing method of the crayon that can display multiple colors according to the present invention can display multiple colors simultaneously. It is not only environmentally friendly due to the use of natural wax components, but also not easy to stick to the hands during use, and will not get dirty or produce powder. Its effects are inhibited, and a crayon with excellent antibacterial properties can be obtained. Brief Description of the Drawings

[0021] Figure 1 It is a photograph showing the appearance of the environmentally friendly crayon capable of expressing multiple colors manufactured through Example 1 of the present invention.

[0022] Description of the Reference Numerals

[0023] S101: Step of manufacturing the crayon base

[0024] S103: Raw material mixing stage

[0025] S105: Compression molding stage

[0026] S107: Heating step

[0027] S109: Coating stage Detailed Description of the Embodiment

[0028] The preferred embodiments of the present invention and the physical properties of each component will be described in detail below. However, the purpose of the detailed description is to enable those skilled in the art to easily implement the present invention, and it does not mean that the technical idea and the scope of the present invention are limited.

[0029] The manufacturing method of the environmentally friendly crayon capable of expressing multiple colors according to the present invention includes a crayon base manufacturing step (S101) of manufacturing a crayon base by mixing carnauba wax, microcrystalline wax, pigment, and surfactant, and the manufacturing of the crayon base is a raw material mixing step (S103) of mixing crayon chips and liquid paraffin with the crayon base material prepared through (S101), a compression molding step (S105) of compression molding the mixture prepared through the raw material mixing step (S103). It consists of a heating step (S107) and a coating application step (S109). The heating step heats the molded product manufactured through the molding step (S105), and the coating application step (S109) applies a coating agent to the molded product heated through the heating step (S107).

[0030] The crayon base manufacturing step (S101) is a step of manufacturing a crayon base by mixing carnauba wax, microcrystalline wax, pigment, and surfactant, including 100 parts by weight of carnauba wax, 80 to 120 parts by weight of microcrystalline wax. Preferably, it is made by mixing 5 to 10 parts by weight of pigment and 0.1 to 0.5 parts by weight of surfactant.

[0031] Carnauba wax is a natural waxy material extracted from the carnauba palm tree that grows only in the northeastern region of Brazil. It is in the form of yellow (or brown) hard flakes and is obtained through processes such as selection, refining, and bleaching. It is processed into wax components through a process. The carnauba wax processed through the above process is taken from nature and does not contain harmful components, so it is environmentally friendly and has high light resistance, thus inhibiting the changes in the physical properties of the environmentally friendly crayons manufactured by the present invention due to visible light and ultraviolet rays. In addition, carnauba wax not only improves the heat resistance of the crayons, preventing the surface from melting due to body temperature during use and causing the crayon components to stick to the hands, but also provides appropriate strength to the crayons during use. The physical properties it provides make it easy to apply and not easily break.

[0032] The content of microcrystalline wax is 80 - 120 parts by weight. It is a wax component obtained by refining and separating the residual asphalt remaining after crude oil refining. It has a small crystallinity and strong hardness, making it very difficult to obtain crayons and playing a role in inhibiting backflow.

[0033] Generally speaking, the molecular structure of paraffin wax is linear alkyl hydrocarbon, while microcrystalline wax contains a large amount of branched alkyl hydrocarbon. Therefore, its melting temperature is higher than that of paraffin wax, and its hardness is also higher.

[0034] If the content of microcrystalline wax is less than 80 parts by weight, the above effects are minimal. If the content of microcrystalline wax exceeds 120 parts by weight, the above effects will not be significantly improved, and the hardness of the crayons becomes too high. Too high, it may cause damage. This is not desirable because it is not applicable.

[0035] The content of pigments is 5 - 10 parts by weight, which can impart various colors to the crayon base. The dye components are not particularly limited, and any components that can be commonly used in crayons can be used, but non-carbon-based, plant components, etc. Extracted natural pigments, non-toxic pigments, earth pigments, inorganic and organic pigments, etc. can be used.

[0036] If the pigment content is less than 5 parts by weight, the coloring power and covering power are low, reducing the practicality as an art tool. If the pigment content exceeds 10 parts by weight, the effect is not significantly improved and the pigments are saturated. Since stirring becomes difficult, the productivity of the crayons is reduced.

[0037] The content of the surfactant is 0.1 - 0.5 parts by weight, preferably composed of a phosphate ester or fatty acid ester with an HLB (hydrophilic-lipophilic balance) value of 6 - 14 and a phosphate ester or fatty acid ester with an HLB value of 6 - 14. More preferably, a phosphate ester or fatty acid ester with an HLB (hydrophilic-lipophilic balance) value of 6 - 14 and a phosphate ester or fatty acid ester with an HLB value of 15 - 19 are mixed in the following ratio: weight ratio 1:1.

[0038] The surfactant composed of the above components provides a colorable crayon by adding two non-ionic surfactants with different HLB values, having a thick consistency and a smooth spreading feeling on materials with non-absorbent surfaces. If the content of the surfactant is less than 0.1 part by weight, the above effects are minimal. If the content of the surfactant exceeds 0.5 part by weight, the above effects will not be significantly improved, and the crayon becomes too soft, which is not desirable because the mechanical properties may deteriorate.

[0039] The raw material mixing process (S103) is a process of mixing crayon pieces and liquid paraffin of a color different from that of the crayon base material with the crayon base material manufactured by the crayon base material manufacturing process (S101), preferably mixing 50 to 70 parts. Relative to 100 parts by weight of the crayon base, crayon fragments with a weight different from the color of the crayon base and 5 to 10 parts by weight of liquid paraffin are formulated.

[0040] The crayon fragments are manufactured by compressing and then crushing a mixture of 100 parts by weight of carnauba wax, 80 to 120 parts by weight of microcrystalline wax, 5 to 10 parts by weight of a dye, and 0.1 to 0.5 part by weight of a surfactant. The particle size of the crushed product is preferably such that the value is 0.5 to 2 mm during the crushing process.

[0041] If the content of the crayon pieces is less than 50 parts by weight or the particle size is less than 0.5 mm, the expression effect of multiple colors of the crayon manufactured by the present invention will be reduced. And if the content of the crayon pieces exceeds 70 parts by weight or the particle size is 2. If it exceeds mm, it is not desirable because the mechanical strength of the crayon may be reduced without significantly improving the above effects.

[0042] At this time, the key significance of the specific components and contents of carnauba wax, microcrystalline wax, dye, and surfactant is the same as that described in the crayon base manufacturing step, so its description will be omitted.

[0043] In addition, the liquid paraffin contains 5 to 10 parts by weight, similar to a fluid lubricant, and contains a large amount of oil. Chemically, it is a mixture of saturated straight-chain hydrocarbons and naphthenes in a stable form, containing no nitrogen compounds, sulfur compounds, oxygen compounds, or low-molecular-weight aromatic compounds, and is environmentally friendly.

[0044] In addition, the liquid paraffin not only bonds the crayon base manufactured by the crayon base manufacturing process (S101) with crayon bases and crayon pieces of different colors as an adhesive, but also has excellent lubricity, so the crayon base and crayon pieces in the compression process (S101) have good lubricity. (S105), which inhibits the formation of voids between the crayon base and the crayon chips or between crayon chips of different sizes, thereby providing a crayon with high density, excellent mechanical properties, and excellent applicability.

[0045] If the content of liquid paraffin is less than 5 parts by weight, the above effects are negligible. If the content of liquid paraffin exceeds 10 parts by weight, the above effects will not be significantly improved, and the mechanical properties and applicability will be affected. The crayons may be excessively reduced. This is not advisable because it may...

[0046] In addition, in the raw material mixing step (S103), relative to 100 parts by weight of the crayon base, 0.1 to 0.3 parts by weight of a natural antibacterial agent may also be contained. The natural antibacterial agent is composed of one or more of the following: Preferably, it is more preferably composed of 100 parts by weight of Artemisia argyi essential oil and 40 to 60 parts by weight of cypress essential oil.

[0047] If a natural antibacterial agent composed of the above components is further contained, a crayon that not only exhibits excellent antibacterial effects but also exhibits excellent odor and psychological stability can be provided.

[0048] Artemisia argyi essential oil contains estragole, β-phellandrene, β-myrcene, 2-butyl-1,2-azaborolidine, and contains perfume raw materials and cosmetic ingredients such as (e)-β-farnesene. (e)-β-farnesene creates a unique fragrance unique to Artemisia argyi and Santorini trees, and contains a large amount of santolina triene, S-α-pinene, camphene, artemisia alcohol, and selinaene.

[0049] Cypress essential oil is a terpene organic compound, a natural substance, not a chemical substance, and can be quickly absorbed by the human body without difficulty, selectively killing bacteria harmful to the human body. The combined experimental results of the Forestry Research Institute and the Institute of Animal Medicine of Chungbuk National University have proven that inhaling cypress essential oil through dilution or volatilization is a substance that does not require worry about safety.

[0050] In addition, cypress essential oil has a strong antibacterial effect. The research results of the Forestry Research Institute show that the antibacterial performance of cypress essential oil is similar to or higher than that of copper sulfate used as a pesticide raw material. The research of the Institute of Animal Medicine of Chungbuk National University shows that cypress essential oil is effective against a variety of bacteria, and it is found to have excellent acidic bactericidal effects. While having a strong antibacterial effect, it has the advantage of not producing drug resistance, different from existing antibiotics.

[0051] The above-mentioned cypress essential oil can be manufactured using the essential oil extraction press described in Patent No. 10-0828927, and the appropriate extraction time is 3 to 9 hours. The reason is that if the extraction time is less than 3 hours, it is impossible to extract enough valuable cypress essential oil as much as possible, thus reducing its functionality; if it exceeds 9 hours, no more cypress essential oil can be extracted, thus reducing the efficiency. In terms of functionality, 7 hours is preferably appropriate. The cypress essential oil manufactured through the above process contains a large amount of phytocides. Phytocides are a type of coniferous tree that relieves stress by reducing the stress hormone cortisol. Cypress phytocides show the most effective effect and can reduce the cortisol concentration by more than half.

[0052] If the content of the natural antibacterial agent composed of the above components is less than 0.1 part by weight, the above-mentioned effect is very small. If the content of the natural antibacterial component exceeds 0.3 part by weight, the above-mentioned effect will not be significantly improved. However, the mechanical properties of the manufactured crayons will deteriorate, which is not desirable because the spreadability may deteriorate.

[0053] The compression molding step (S105) is a step of compression molding the mixture prepared through the raw material mixing step (S103). The mixture prepared through the raw material mixing step (S103) is input into the compression molding device and exhibits a constant forming. In the process of processing into a molded product, the shape of the molded product is not particularly limited. However, considering the convenience of use, etc., it is preferably molded into a width of 1 to 1.5 cm, a length of 1 to 1.5 cm, and a length of 8 to 12 cm.

[0054] The heating step (S107) is a step of heating the molded product manufactured through the compression molding step (S105), and the molded product manufactured through the compression molding step (S105) is heated to a temperature of 110 to 130 °C and maintained for 5 to 10 minutes. Preferably, this is completed through a heating process.

[0055] When the molded product is heated at the above temperature and time through the heating step (S107), the wax component contained in the molded product melts and cools to room temperature, and the crayon chip component is firmly bonded to the crayon base component, thereby improving the mechanical properties. An improved crayon can be provided.

[0056] At this time, if the temperature of the heating step (S107) is lower than 110 °C or the heating time is less than 5 minutes, the melting of the wax component contained in the molded product cannot be carried out properly and the above-mentioned effect is minimal. If the temperature of the heating step (S107) exceeds 130 °C or the heating time exceeds 10 minutes, the wax component contained in the molded product may be carbonized, and the manufactured physical properties and appearance quality are reduced, so it is not desirable. The crayon may deteriorate.

[0057] The coating agent application step (S109) is a step of applying a coating agent to the molded product heated by the heating step (S107). With respect to 100 parts by weight of the molded product, 0.5 to 1 part by weight of the coating agent is applied. The product is heated by the heating step (S107). It is desired that it be completed through a process.

[0058] Made of polyvinylpyrrolidone (PVP). Ideal.

[0059] The density of polyvinylpyrrolidone is 12 g / cm 3 , the melting point is 150 °C, using water or alcohol as the solvent, having excellent film-forming ability, and showing flexibility and a smooth texture, making it a non-sticky crayon. The feel is light, and the surface feel is excellent, reflecting the provided effect.

[0060] If the amount of the coating agent is less than 0.5 part by weight, the effect is minimal. If the amount of the coating agent is greater than 1 part by weight, the effect is not significantly improved and the thickness of the coating increases excessively, resulting in a decrease in the spreadability of the crayon. This is not desirable because it may occur.

[0061] Hereinafter, the manufacturing method of an environmentally friendly crayon capable of showing multiple colors according to the present invention and the physical properties of the crayon manufactured by the manufacturing method will be described using examples.

[0062] <Manufacturing Example 1> Production of Crayon Substrate

[0063] 100 parts by weight of carnauba wax, 100 parts by weight of microcrystalline wax, 7.5 parts by weight of a pigment (Blue No. 5), and 17 parts by weight (mixed at a weight ratio of 1:1) of 0.3 parts by weight of a surfactant (phosphate ester with an HLB value of 10, fatty acid ester with an HLB value of 10) were added to a mixing device and stirred at 500 rpm for 10 minutes to prepare a crayon base.

[0064] <Manufacturing Example 2> Production of Crayon Flakes

[0065] 100 parts by weight of carnauba wax, 100 parts by weight of microcrystalline wax, 7.5 parts by weight of a pigment (Blue No. 3), and 17. (mixed at a weight ratio of 1:1) 0.3 parts by weight of a surfactant (phosphate ester with an HLB value of 10, fatty acid ester with an HLB value of 10) were placed in a mixing device, stirred at 500 rpm for 10 minutes, heated to 120 °C, stirred for 8 minutes, cooled, and the cooled mixture was crushed to a particle size of 0.5 to 2 mm to make crayon flakes.

[0066] <Manufacturing Example 3> Production of Crayon Flakes

[0067] 100 parts by weight of carnauba wax, 100 parts by weight of microcrystalline wax, 7.5 parts by weight of pigment (Blue No. 1), 0.3 parts by weight of surfactant (phosphate ester with HLB value of 10 and fatty acid ester with HLB value of 10, mixed in a weight ratio of 1:1) are put into a mixing device, stirred at a speed of 500 revolutions per minute for 10 minutes, heated to 120 °C, stirred for 8 minutes, cooled, and the cooled mixture is crushed to a particle size of 0.5 to 2 mm to make crayon fragments.

[0068] <Production Example 4> Production of Crayon Pieces

[0069] 100 parts by weight of carnauba wax, 100 parts by weight of microcrystalline wax, 7.5 parts by weight of pigment (purple), surfactant (phosphate ester with HLB value of 10 and fatty acid ester with HLB value of 17) are mixed (weight ratio 1:1) 0.3 parts by weight are put into a mixing device, stirred at a speed of 500 rpm for 10 minutes, heated to 120 °C, held for 8 minutes, cooled, and the cooled mixture is crushed to a particle size of 0.5 to 2 mm to prepare crayon fragments.

[0070] <Preparation Example 5> Preparation of Natural Antibacterial Agent

[0071] 100 parts by weight of Artemisia argyi essential oil and 50 parts by weight of cypress essential oil are mixed to make a natural antibacterial agent.

[0072] <Example 1>

[0073] 100 parts by weight of the crayon base prepared in Preparation Example 1, 20 parts by weight of the crayon fragments prepared in Preparation Example 2, 20 parts by weight of the crayon fragments prepared in Preparation Example 3, 20 parts by weight of the crayon fragments and 7.5 parts by weight of liquid paraffin are mixed to prepare a mixture. The prepared mixture is put into a compression molding device and molded into a shape of 1.2 cm wide × 1.2 cm long × 10 cm long. The manufactured molded body is placed at a temperature of 120 °C and heated for 8 minutes. 0.8 parts by weight of a coating agent (polyvinylpyrrolidone) is coated on the surface of 100 parts by weight of the molded body. Heat molding is carried out to produce an environmentally friendly crayon capable of expressing multiple colors.

[0074] <Example 2>

[0075] The same steps as in Example 1 are carried out, but by mixing 5 parts by weight of liquid paraffin, an environmentally friendly crayon capable of showing multiple colors is prepared.

[0076] <Example 3>

[0077] The same steps as in Example 1 are carried out, but by mixing 10 parts by weight of liquid paraffin, an environmentally friendly crayon capable of showing multiple colors is prepared.

[0078] <Example 4>

[0079] Perform the same procedure as in Example 1, but mix an additional 0.2 parts by weight of the natural antibacterial agent with 100 parts by weight of the crayon base to prepare an environmentally friendly crayon capable of expressing colors.

[0080] <Example 5>

[0081] Perform the same procedure as in Example 2, but mix an additional 0.2 parts by weight of the natural antibacterial agent with 100 parts by weight of the crayon base to prepare an environmentally friendly crayon capable of expressing colors.

[0082] <Example 6>

[0083] Perform the same procedure as in Example 3, but mix an additional 0.2 parts by weight of the natural antibacterial agent with 100 parts by weight of the crayon base to prepare an environmentally friendly crayon capable of expressing colors.

[0084] <Comparative Example 1>

[0085] Monami blue crayon.

[0086] <Comparative Example 2>

[0087] Prepare a crayon in the same manner as in Example 1, but without mixing liquid paraffin.

[0088] <Comparative Example 3>

[0089] Manufacture a crayon in the same manner as in Example 1, but without applying a coating agent.

[0090] Measure whether the crayon components prepared by Examples 1 to 6 and Comparative Examples 1 to 3 are smeared on the hands, and the results are shown in Table 1 below.

[0091] {However, to determine whether the components of the manufactured crayons are smeared on the hands, 50 subjects were divided into 5 groups of 10 people each, and they were instructed to use the manufactured crayons to draw 50 lines with a length of 20 cm. The degree of smearing of the components was measured using a three-point scale for the applied values and then expressed as an average value.

[0092] 3 points: very doubtful, 2 points: slightly doubtful, 1 point: not doubtful}

[0093]

[0094]

[0095] As shown in Table 1, it can be seen that the crayons prepared according to Examples 1 to 6 of the present invention have less stickiness to the hands compared to the crayons prepared by Comparative Examples 1 and 3.

[0096] In addition, the powder generation amounts of the crayon components prepared in Examples 1 to 6 and Comparative Examples 1 to 3 were measured and are shown in Table 2 below.

[0097] {However, the appearance of powder in the manufactured crayon components was determined by instructing the manufactured crayons to draw 50 lines of 20 cm in length on a sketchbook, and then drying the sketchbook with the drawn lines at a temperature of 50°C for 24 hours. The amount was visually confirmed, measured using a three-point scale, and then expressed as an average value.

[0098] 3 points: very common, 2 points: slightly occurred, 1 point: not occurred}

[0099]

[0100]

[0101] As shown in Table 2, it can be seen that the crayons manufactured in Examples 1 to 6 of the present invention generate less powder than the crayons manufactured in Comparative Examples 1 to 3.

[0102] In addition, the antibacterial properties of the crayons prepared in Examples 4 to 6 and Comparative Examples 1 to 3 were measured and are shown in Table 3 below.

[0103] {However, for the antibacterial properties, 10 ± 0.1 g crayon samples prepared in Examples 4 to 6 and Comparative Examples 1 to 3 were prepared according to ASTM E2149-10, and then a sterile 250 ml shake flask was prepared for each sample. 50 ± 0.5 ml of a flowing dilution of the bacterial inoculum was added to each flask. After placing each sample of the manufactured non-woven fabric into each flask, each flask was placed on a shaker (wrist shaker) and shaken at maximum speed for 60 ± 5 minutes. After dilution, it was dispensed onto a plate medium and cultured at 35°C for 24 hours. ±2°C. After culturing in an incubator, the method of examining the number of colonies in the petri dish under a microscope was used.

[0104] In addition, the antibacterial activity was calculated using the following formula.

[0105] Antibacterial activity (%) = (BA) / B × 100

[0106] A: The number of bacteria after the sample is in contact with the bacterial dilution for a period of time

[0107] B: The number of bacteria in the control group where the sample is not treated

[0108] * Negative control group 100%, positive control group 5.4%}

[0109]

[0110]

[0111] As shown in Table 3, it can be seen that compared with the crayons prepared by Comparative Examples 1 to 3, the crayons prepared by Examples 4 to 6 of the present invention exhibit excellent antibacterial properties.

[0112] Therefore, the method for manufacturing a multi-colorable crayon according to the present invention can simultaneously exhibit multiple colors, is environmentally friendly due to the use of natural wax components, is not sticky to the hands during use, and does not get dirty or stain. The present invention provides a crayon that suppresses the generation of powder after coating and exhibits excellent antibacterial properties.

Claims

1. A manufacturing process for a crayon base material, which involves mixing 100 parts by weight of carnauba wax, 80 - 120 parts by weight of microcrystalline wax, 5 - 10 parts by weight of pigments, and 0.1 - 0.5 parts by weight of surfactants to prepare the crayon base material; A raw material mixing step, which involves mixing 50 to 70 parts by weight of crayon fragments of a color different from that of the crayon base material and 5 to 10 parts by weight of liquid paraffin with 100 parts by weight of the crayon base material prepared through the crayon base material manufacturing step; A compression molding step, which involves compression molding the mixture prepared through the raw material mixing step; A heating step, which involves heating the molded product manufactured through the compression molding step; and It includes a coating agent coating step, which involves coating 0.5 to 1 part by weight of the coating agent onto 100 parts by weight of the molded body heated through the heating step, The crayon fragments are manufactured by compressing and then pulverizing a mixture of 100 parts by weight of carnauba wax, 80 to 120 parts by weight of microcrystalline wax, 5 to 10 parts by weight of dyes, and 0.1 to 0.5 parts by weight of surfactants. A manufacturing method for an environmentally friendly crayon capable of expressing colors.

2. In claim 1, In the raw material mixing step, 0.1 to 0.3 parts by weight of a natural antibacterial agent are added relative to 100 parts by weight of the crayon base, A manufacturing method of an environment-friendly crayon capable of showing multiple colors, characterized in that, The natural antibacterial agent is composed of one or more of artemisia essential oil and cypress essential oil.

3. In claim 1, The surfactant is an environmentally friendly product that can display multiple colors, and its characteristics are It is made by mixing a phosphate ester or fatty acid ester with an HLB (hydrophilic - lipophilic balance) value of 6 - 14 and an acid ester with an HLB value of 15 to 19. How to make a crayon.

4. In claim 1, A manufacturing method of an environmentally friendly crayon capable of showing multiple colors, characterized in that, The heating step is carried out at a temperature of 110°C to 130°C for 5 minutes to 10 minutes.

5. In claim 1, A manufacturing method of an environment-friendly crayon capable of showing multiple colors, characterized in that, The coating agent is made of polyvinylpyrrolidone.

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