Food-grade colorful bar and manufacturing method thereof

Abstract

The invention provides a colorful stick. The colorful stick is prepared from the following components: food-grade wax, food-grade vegetable fat, a food-grade binder, food-grade alcohol, food-grade filler, a food-grade emulsifier, food-grade water-soluble pigment, an antibacterial agent and deionized water. Wherein a novel food-grade antibacterial agent is prepared, the antibacterial activity and the antibacterial stability are improved by limiting the particle size of the antibacterial agent and selecting a food-grade carrier, so that the colorful rod has the antibacterial property, bacteria generated on the surface due to contact can be inhibited in the using process, and the safety is further improved. The invention further discloses an optimized colorful rod production technological process, pigment powder adopted in the conventional production process is replaced with the water-soluble pigment, the grinding step can be omitted, and higher-efficiency production can be achieved.

Description

Technical Field

[0001] The invention relates to a food-grade colorful stick made of food-grade wax, food-grade vegetable oil, food-grade binder, food-grade alcohol, food-grade filler, food-grade emulsifier, food-grade water-soluble pigment, antibacterial agent and deionized water, and a preparation method thereof. Background Art

[0002] Colorful sticks are oil-based color painting sticks. Compared with traditional crayons and oil pastels, colorful sticks feel smooth and have no resistance at all. They have bright colors, distinct coatings, and are mainly filled with non-toxic and environmentally friendly materials, making them safer. Colorful sticks are also very easy to clean. Even if you accidentally draw on clothes, don't worry. You can wash them clean with clean water. And because of the improvement of materials, colorful sticks can be used not only on paper, but also on frosted glass, floor tiles, and even the human body. Because there is a plastic shell, your hands will not directly touch the wax core, which is clean and hygienic.

[0003] However, traditional colorful sticks are generally made of industrial-grade raw materials. Although the colorful sticks meet current safety requirements, the industrial-grade raw materials still contain more heavy metals such as lead, cadmium, barium, antimony, arsenic, mercury, selenium or other harmful substances. There are still great safety hazards for young children and teenagers who use colorful sticks more frequently. They may engage in dangerous behaviors such as accidental ingestion, which may cause poisoning and threaten their health.

[0004] Other food-grade paint sticks on the market are prone to breeding bacteria and viruses due to their formula, which can easily cause infection and disease in young children and teenagers with low resistance. At the same time, paintings made with such food-grade paint sticks will also mold and deteriorate in a warm and humid environment, which is not conducive to the long-term preservation of the paintings. Summary of the invention

[0005] The present invention provides a food-grade colorful stick with antibacterial function, including the following technical solutions:

[0006] A food-grade colorful stick, characterized in that, by weight, the food-grade colorful stick comprises:

[0007] Food grade wax: 10-50 parts, preferably 20-40 parts;

[0008] Food grade vegetable oil: 1-10 parts, preferably 3-7 parts;

[0009] Food grade binder: 1-10 parts, preferably 3-7 parts;

[0010] Food grade alcohol: 5-20 parts, preferably 8-15 parts;

[0011] Food grade filler: 5-20 parts, preferably 7-17 parts;

[0012] Food grade emulsifier: 5-30 parts, preferably 10-20 parts;

[0013] Food grade water-soluble pigment: 3-15 parts, preferably 5-10 parts;

[0014] Deionized water: 5-20 parts, preferably 8-15 parts;

[0015] Food grade antibacterial agent: 1-10 parts, preferably 4-8 parts.

[0016] Among them, the food-grade wax is one or more food-grade waxes selected from paraffin, beeswax, microcrystalline wax, montan wax, worm wax, wood wax, Japan wax, carnauba wax, candelilla wax, Fischer-Tropsch wax, polyethylene wax, polypropylene wax, ethylene-vinyl acetate copolymer wax, oxidized polyethylene wax and the like.

[0017] The food-grade vegetable oil is one or more food-grade oils selected from olive oil, coconut oil, castor oil, cottonseed oil, soybean oil, sesame oil, almond oil, peanut oil, corn oil, rice bran oil, tea seed oil, sea buckthorn oil, avocado oil, kuju oil, nut oil, walnut oil, cocoa butter and the like.

[0018] The food-grade binder is one or more food-grade binders selected from sodium carboxymethyl cellulose, sodium carboxyethyl cellulose, polyvinyl pyrrolidone, guar gum, gum arabic, xanthan gum, and the like.

[0019] The food-grade alcohol is one or more food-grade alcohols selected from ethanol, propylene glycol, glycerol, isopropanol, benzyl alcohol, phenylethyl alcohol, isopropanol, n-butanol and the like.

[0020] The food-grade filler is one or more food-grade fillers selected from calcium carbonate, magnesium carbonate, kaolin, talcum powder, white carbon black, aluminum silicate, aluminum hydroxide, barium sulfate and the like.

[0021] The food-grade emulsifier is a food-grade emulsifier other than the food-grade antibacterial agent, and is selected from one or more of glyceryl monostearate, glyceryl distearate, fatty acid glycerides, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, and the like.

[0022] The food-grade water-soluble pigment is one or more selected from capsicum red, turmeric, natural carotene, lac red, cochineal red, sunset yellow, lemon yellow, quinoline yellow, amaranth, carmine, erythrosine, allura red, brilliant blue, indigo and the like.

[0023] The food-grade antibacterial agent is an antibacterial agent with silver ions as active components. Further, by weight, the food-grade antibacterial agent comprises:

[0024] Silver ion salt: 0.1-10 parts, preferably 1-5 parts;

[0025] Food grade emulsifier: 1-15 parts, preferably 5-10 parts;

[0026] Deionized water: 10-70 parts, preferably 20-50 parts;

[0027] Food grade carrier: 20-60 parts, preferably 30-50 parts.

[0028] The silver ion salt is one or more selected from silver sulfate, silver nitrate and silver chloride.

[0029] The food-grade carrier is a carrier having a three-dimensional crystal structure or a porous structure, and is preferably selected from one or more of food-grade titanium dioxide, food-grade zinc oxide, food-grade silicon dioxide, and food-grade activated carbon; more preferably, it is food-grade silicon dioxide.

[0030] The food-grade emulsifier is one or more selected from glyceryl monostearate, glyceryl distearate, fatty acid glycerides, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate and the like.

[0031] The present invention also provides a method for preparing the aforementioned food-grade silver ion antibacterial agent, comprising the following steps:

[0032] Step 1: Add silver ion salt to deionized water and stir until it is completely dissolved;

[0033] Step 2: Add an emulsifier to the silver ion solution in step 1, stir evenly, then add a carrier, mix and stir evenly to form a semi-solid mixture;

[0034] Step 3: The semi-solid mixture is dried in a dark place, and then the dried product is moved to a muffle furnace for high-temperature calcination, and the silver ion antibacterial agent is obtained after the calcination is completed.

[0035] The particle size D50 of the calcined antibacterial agent is 7-13 μm, preferably 9-11 μm, and the particle size D90 is 13-20 μm, preferably 14-15 μm.

[0036] Wherein, in steps 1 and 2, the stirring speed is 500-2000 rpm, preferably 1000-1500 rpm; the stirring time is 50-120 min, preferably 80-100 min;

[0037] In step 3, the drying treatment temperature is 30-60°C, preferably 45-50°C; the drying time is 24-48h, preferably 35-40h; the calcination temperature is 600-1000°C, preferably 800-1000°C, and the calcination time is 5-36h, preferably 10-24h.

[0038] The 7-day silver ion release rate of the food-grade colorful stick is 0.01-0.1% / 7d, and the preferred range is 0.03-0.07% / 7d. The testing and calculation methods are as follows: 10g of the food-grade colorful stick product is placed in simulated body fluid, and the silver ion content released in the solution is measured by inductively coupled plasma mass spectrometry, and the ratio of the measured mass concentration of released silver ions to the total mass concentration of silver ions is calculated.

[0039] The present invention also provides a method for preparing the aforementioned food-grade colorful stick, comprising the following steps:

[0040] Step a: adding a food-grade binder, a food-grade water-soluble pigment and a food-grade alcohol into deionized water and stirring and dissolving them to form a uniform mixed colorant;

[0041] Step b: Mix and melt the food-grade wax, the vegetable oil and the food-grade emulsifier, stir and mix them evenly to obtain a mixed wax, and after the mixed wax is completely melted, add the evenly mixed colorant obtained in step a, stir and mix them evenly to obtain a uniform mixture;

[0042] Wherein, the emulsifier added in step b is a food-grade emulsifier other than the food-grade emulsifier in the food-grade antibacterial agent;

[0043] Step c: slowly and evenly adding the food-grade filler and the antimicrobial agent to the uniform mixture obtained in step b under stirring, and continuously stirring until a uniform liquid slurry mixture with no visible agglomerates is obtained;

[0044] Step d: The uniform mixture obtained in step c is subjected to a molding process to obtain the food-grade colorful stick.

[0045] Wherein, the mixing and melting in step b is carried out at a heating temperature of 80-110°C, preferably 90-100°C, and the stirring time is 60-120min, preferably 70-100min;

[0046] In step c, the stirring is performed at a heating temperature of 70-95°C, preferably 80-90°C, and the stirring time is 30-60 minutes, preferably 40-50 minutes;

[0047] The molding process in step d is carried out at a cooling temperature of 5-25°C, preferably 10-15°C. Specific implementation method:

[0048] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a food-grade colorful stick with antibacterial properties and a method for making the same. By reshaping the formula system of the colorful stick and selecting food-grade raw materials for formula development, the product safety performance is greatly improved on the basis of ensuring ultra-smooth and delicate painting, and the hazards caused by the use of industrial-grade raw materials are reduced. At the same time, the functions of the colorful stick are upgraded to make it antibacterial, so that it can inhibit bacteria generated on the surface due to contact during use.

[0049] At the same time, in view of the fact that silver ion antibacterial agents are easily oxidized and discolored during use, a new preparation scheme for silver ion antibacterial agents is developed, and the new silver ion antibacterial agent will not change color during use, thereby affecting the color performance of the painting of the colorful stick. The new food-grade silver ion antibacterial agent prepared by the present invention has better comprehensive antibacterial performance, can achieve long-term antibacterial effect, and is conducive to the long-term preservation of paintings.

[0050] Furthermore, in order to cooperate with the use of new food-grade silver ion antimicrobial agents, the current production process is further optimized, and water-soluble pigments are used to replace the pigment powder used in the conventional production process. The grinding step can be eliminated. In addition to improving production efficiency, it can also avoid the adverse effects of the ground pigment powder particles on the silver ion release rate in the antimicrobial agent.

[0051] The present invention provides a food-grade colorful stick with antibacterial function, which is composed of the following ingredients: food-grade wax, food-grade vegetable oil, food-grade binder, food-grade alcohol, food-grade filler, food-grade emulsifier, food-grade water-soluble pigment, food-grade antibacterial agent and deionized water. The food-grade refers to that the raw materials meet the corresponding food-grade national standards.

[0052] By weight, the food-grade colorful stick comprises:

[0053] Food grade wax: 10-50 parts, preferably 20-40 parts;

[0054] Food grade vegetable oil: 1-10 parts, preferably 3-7 parts;

[0055] Food grade binder: 1-10 parts, preferably 3-7 parts;

[0056] Food grade alcohol: 5-20 parts, preferably 8-15 parts;

[0057] Food grade filler: 5-20 parts, preferably 7-17 parts;

[0058] Food grade emulsifier: 5-30 parts, preferably 10-20 parts;

[0059] Food grade water-soluble pigment: 3-15 parts, preferably 5-10 parts;

[0060] Deionized water: 5-20 parts, preferably 8-15 parts;

[0061] Food grade antibacterial agent: 1-10 parts, preferably 4-8 parts.

[0062] Among them, food-grade wax serves as a product base and plays a shaping role. The food-grade wax is not particularly limited as long as it does not adversely affect the purpose of the present invention. Suitable food-grade waxes include, but are not limited to, one or more food-grade waxes selected from paraffin, beeswax, microcrystalline wax, montan wax, worm wax, wood wax, Japan wax, carnauba wax, candelilla wax, Fischer-Tropsch wax, polyethylene wax, polypropylene wax, ethylene-vinyl acetate copolymer wax, oxidized polyethylene wax, etc.

[0063] The food-grade vegetable oil increases the smoothness of painting and achieves a super-smooth feel. The food-grade vegetable oil is not particularly limited as long as it does not adversely affect the purpose of the present invention. Suitable food-grade vegetable oils include, but are not limited to, one or more food-grade oils selected from olive oil, coconut oil, castor oil, cottonseed oil, soybean oil, sesame oil, almond oil, peanut oil, corn oil, rice bran oil, tea seed oil, sea buckthorn oil, avocado oil, kuju oil, European nut oil, walnut oil, cocoa butter, etc.

[0064] The food-grade binder plays an adhesive role, enabling the colorful stick to create pictures on different media such as desktops and glass. The food-grade binder is not particularly limited, as long as it does not adversely affect the purpose of the present invention. Suitable food-grade binders include, but are not limited to, one or more food-grade binders selected from sodium carboxymethyl cellulose, sodium carboxyethyl cellulose, polyvinyl pyrrolidone, guar gum, gum arabic, xanthan gum, etc.

[0065] Food grade alcohol can increase the smoothness of the system and provide a certain water solubility in the system. The food grade alcohol is not particularly limited as long as it does not adversely affect the purpose of the present invention. Suitable food grade alcohols include, but are not limited to, one or more food grade alcohols selected from ethanol, propylene glycol, glycerol, isopropanol, benzyl alcohol, phenylethyl alcohol, isopropanol, n-butanol, etc.

[0066] The food-grade filler can bring a certain hardness to the finished product, ensuring that it is not easy to break during use. The food-grade filler is not particularly limited, as long as it does not adversely affect the purpose of the present invention. Suitable food-grade fillers are, for example, but not limited to: one or more of fillers selected from calcium carbonate, magnesium carbonate, kaolin, talc, white carbon black, aluminum silicate, aluminum hydroxide, barium sulfate, etc. that reach food grade.

[0067] The food-grade emulsifier is not particularly limited as long as it does not adversely affect the purpose of the present invention. Suitable food-grade emulsifiers include, but are not limited to, one or more selected from monostearate glyceryl, distearate glyceryl, fatty acid glycerides, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, etc. The food-grade emulsifier is a food-grade emulsifier other than the food-grade emulsifier in the food-grade antibacterial agent.

[0068] The food-grade water-soluble pigment is not particularly limited, as long as it does not have an adverse effect on the purpose of the present invention. Suitable food-grade water-soluble pigments include, but are not limited to, one or more selected from capsicum red, turmeric, natural carotene, lac red, cochineal red, sunset yellow, lemon yellow, quinoline yellow, amaranth, carmine, erythrosine, allure red, brilliant blue, indigo, etc.

[0069] The antibacterial agent gives the colorful stick antibacterial properties, and can inhibit bacteria generated on the surface due to contact during use. The food-grade antibacterial agent is an antibacterial agent with silver ions as active components. Further, by weight, the food-grade antibacterial agent includes:

[0070] Silver ion salt: 0.1-10 parts, preferably 1-5 parts;

[0071] Food grade emulsifier: 1-15 parts, preferably 5-10 parts;

[0072] Deionized water: 10-70 parts, preferably 20-50 parts;

[0073] Food grade carrier: 20-60 parts, preferably 30-50 parts.

[0074] Among them, the silver ion salt provides the main component of the antibacterial agent, and the silver ion salt is not particularly limited as long as it does not adversely affect the purpose of the present invention. Suitable silver ion salts are, for example but not limited to: one or more selected from silver sulfate, silver nitrate, silver chloride and the like.

[0075] The food-grade carrier mainly uses a three-dimensional crystal structure or a porous structure that is resistant to high temperatures and has the ability to load particles, which is conducive to forming a strong and stable composite structure. Suitable food-grade carriers include, but are not limited to, one or more selected from food-grade titanium dioxide, food-grade zinc oxide, food-grade silicon dioxide, food-grade activated carbon, etc.

[0076] Food-grade emulsifiers mainly play the role of dispersing and promoting bonding, ensuring the dispersibility of metal particles. In the process of preparing food-grade antimicrobial agents, food-grade emulsifiers can form a coating structure on the surface of the carrier, and in the process of preparing colorful sticks, they can emulsify the water and oil in the system into a homogeneous phase, thereby ensuring the uniformity of system mixing. At the same time, emulsifiers can be adsorbed or enriched on the interface between the carrier and the slurry system, reducing the interfacial tension, enhancing the compatibility of the antimicrobial agent in the system, improving the dispersibility of the antimicrobial agent in the system, and ensuring the uniformity of the antimicrobial agent in the system.

[0077] The food-grade emulsifier is not particularly limited as long as it does not adversely affect the purpose of the present invention. Suitable food-grade emulsifiers include, but are not limited to, one or more selected from glyceryl monostearate, glyceryl distearate, fatty acid glycerides, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, and the like.

[0078] The food-grade silver ion antibacterial agent is prepared by the following method:

[0079] Step 1: Add silver ion salt into deionized water and stir until completely dissolved;

[0080] Step 2: Add an emulsifier to the silver ion solution in step 1, stir evenly, then add a carrier, mix and stir evenly to form a semi-solid mixture;

[0081] Step 3: Dry the semi-solid mixture away from light, and then move the dried product to a muffle furnace for high-temperature calcination. After the calcination is completed, a silver ion antibacterial agent is obtained.

[0082] Wherein, in steps 1 and 2, the stirring speed is 500-2000 rpm, preferably 1000-1500 rpm; the stirring time is 50-120 min, preferably 80-100 min;

[0083] In step 3, the drying treatment temperature is 30-60°C, preferably 45-50°C; the drying time is 24-48h, preferably 35-40h; the calcination temperature is 600-1200°C, preferably 800-1000°C; the calcination time is 5-36h, preferably 10-24h.

[0084] The particle size of the antibacterial agent after calcination is D50 of 7-13 μm, preferably 9-11 μm, and D90 of 13-20 μm, preferably 14-15 μm.

[0085] Calcination can promote and strengthen the loading of solid metal particles on the carrier material, so that the silver ions and the carrier have stronger adsorption at the particle level, forming a more stable composite structure. Compared with the silver ion antibacterial agent usually obtained by simple stirring, mixing and adsorption, the silver ion antibacterial agent obtained by high-temperature calcination has a stable silver particle release rate, improves the dispersibility of silver ions in the material and the compatibility of particles and carrier materials, and the silver ions are slowly released during use and are not easily oxidized, thereby solving the problem of silver ion discoloration.

[0086] The particle size of the silver ion antibacterial agent will affect the antibacterial property. In theory, the smaller the particle size of the antibacterial agent, the better the antibacterial property. This is because the particles with smaller particle size have a larger specific surface area, and the effective area that can interact with bacteria is larger, and the antibacterial property is better; however, as the particle size of the antibacterial agent decreases, the release rate of silver ions increases, and the silver ions are all released in a short time, and subsequently no longer have antibacterial properties, and silver ions are easily oxidized and discolored to black, affecting the painting properties of the colorful stick. Therefore, the present invention selects the antibacterial agent particle size D50 to be 7-13μm, preferably 9-11μm, and D90 to be 13-20μm, preferably 14-15μm, taking into account the antibacterial property and antibacterial stability of the antibacterial agent, and the slow release of silver ions helps to achieve long-term antibacterial, with good comprehensive antibacterial properties.

[0087] Silver ion release efficiency test method: Place the product in simulated body fluid (SBF solution) and use inductively coupled plasma mass spectrometry (ICP-MS) to measure the silver ion content released in the solution. The 7-day silver ion release rate was measured to be in the range of 0.01-0.1% / 7d, with a preferred range of 0.03-0.07% / 7d.

[0088] Through the above preparation method, the antibacterial silver ions are loaded on the carrier three-dimensional crystal structure (tetrahedral space network structure, cubic crystal system, hexagonal lattice, octahedral structure, etc.) or porous structure (porosity 50%-75%) to improve the stability of the antibacterial agent. The composite structure is mainly formed by metal particles and carriers. The metal particles are dispersed by emulsifiers so that the metal particles can be evenly dispersed in the system. Then, by calcination, the metal particles are firmly loaded on the crystal structure of the carrier to form a stable adsorption structure, which delays the release rate of the particles.

[0089] Preferably, the use of silica with a regular tetrahedral spatial network structure can achieve better loading conditions. The regular tetrahedral spatial network structure not only has stability, but also has a spatial advantage in structure, and can load silver ions more stably, thereby delaying the release rate.

[0090] The present invention also provides a method for preparing a food-grade colorful stick, comprising:

[0091] Step a: adding a food-grade binder, a food-grade water-soluble pigment and a food-grade alcohol into deionized water and stirring and dissolving them to form a uniform mixed colorant;

[0092] Step b: Mix and melt the food-grade wax, the vegetable oil and the food-grade emulsifier, stir and mix them evenly to obtain a mixed wax, and after the mixed wax is completely melted, add the evenly mixed colorant obtained in step a, stir and mix them evenly to obtain a uniform mixture;

[0093] Wherein, the emulsifier added in step b is a food-grade emulsifier other than the food-grade emulsifier in the food-grade antibacterial agent;

[0094] Step c: slowly and evenly adding the food-grade filler and the antimicrobial agent to the uniform mixture obtained in step b under stirring, and continuously stirring until a uniform liquid slurry mixture with no visible agglomerates is obtained;

[0095] Step d: The uniform mixture obtained in step c is subjected to a molding process to obtain the food-grade colorful stick.

[0096] Wherein, the mixing and melting in step b is carried out at a heating temperature of 80-110°C, preferably 90-100°C, and the stirring time is 60-120min, preferably 70-100min;

[0097] In step c, the stirring is performed at a heating temperature of 70-95°C, preferably 80-90°C, and the stirring time is 30-60 minutes, preferably 40-50 minutes;

[0098] The molding process in step d is carried out at a cooling temperature of 5-25°C, preferably 10-15°C.

[0099] The present invention reshapes the formula system of the colorful stick and develops a food-grade colorful stick with antibacterial properties in a new formula system. Compared with the existing ordinary colorful sticks, it is more convenient for young children to use on the basis of greatly improved safety. At the same time, it expands the use scenarios. It can not only draw on paper, but also play a marking role on other media. It has multiple functions while improving the painting experience. The unique antibacterial property can also better protect the safety of users. The use of safe and harmless antibacterial agents can kill bacteria contaminated during daily use, which is conducive to the long-term preservation of paintings. The food-grade colorful stick of the present invention has the following advantages:

[0100] 1. The food-grade colorful stick of the present invention is completely made of food-grade raw materials, which is green and safe. Compared with the colorful sticks currently on the market made of industrial-grade raw materials, the content of heavy metals or harmful substances is basically close to zero, and it has higher safety. At the same time, it has antibacterial properties and good antibacterial stability. During use, it can inhibit bacteria generated on the surface due to contact, and the safety of use is further improved.

[0101] 2. The food-grade colorful stick of the present invention has the characteristics of bright colors and super smooth feel. It has strong coloring power, good spreadability and excellent color stacking performance when painted on paper, and solves the problem of silver ions being easily released and oxidized and discolored.

[0102] 3. The food-grade colorful stick of the present invention has a smoother feel and more uniform painting than ordinary colorful sticks, and is more suitable for use by young children. Compared with ordinary colorful sticks, it has stronger adhesion and can be painted on desktops, glass and other media. It can also be used as a marking pen, increasing the scope of use and purpose.

[0103] 4. The production process of the food-grade colorful sticks of the present invention has been further optimized to eliminate the production process of using pigment powder as a colorant in conventional production, and use a water-soluble color system as a system colorant to better match the use of silver ion antibacterial agents. On the basis of ensuring bright colors, no grinding process is required during the production process, thereby reducing production costs.

[0104] The technical solution of the present invention is further described below according to specific embodiments. The protection scope of the present invention is not limited to the following embodiments, which are listed only for illustrative purposes and do not limit the present invention in any way.

[0105] Embodiment 1:

[0106] By weight, 1 part of silver sulfate (Shanghai Aladdin Biochemical Technology Co., Ltd.) was added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of glyceryl monostearate (Mingrui Group (Henan) Co., Ltd.) were added, stirred at 1000 rpm for 80 min, and then 39 parts of food-grade silicon dioxide with a regular tetrahedral spatial network structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0107] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 800°C for 10 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 9 μm at D50 and 14 μm at D90.

[0108] By weight, 3 parts of food-grade sodium carboxymethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 10 parts of food-grade water-soluble pigment lemon yellow (Hubei Kangleyuan Biotechnology Co., Ltd.), and 8 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0109] By weight, 34 parts of food-grade paraffin wax (Cangzhou Dongfang Beeswax Co., Ltd.), 3 parts of food-grade castor oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade glyceryl monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 90 minutes to obtain a uniform mixture;

[0110] The uniform mixture obtained in the above step was heated to 85° C. until it was completely melted, and 12.2 parts of food-grade calcium carbonate (Huiteng Chemical Official Flagship Store) and 4.8 parts of antibacterial agent were slowly and evenly added under stirring, and the stirring was continued for 50 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0111] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 15°C.

[0112] Embodiment 2:

[0113] By weight, 5 parts of silver nitrate (Shanghai Aladdin Biochemical Technology Co., Ltd.) were added to 45 parts of deionized water, stirred at 1500 rpm for 80 min, then 10 parts of distearic acid glyceryl (Mingrui Group (Henan) Co., Ltd.) were added, stirred at 1500 rpm for 80 min, and then 40 parts of food-grade titanium dioxide with a hexagonal lattice structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0114] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 1000°C for 15 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 10.5 μm at D50 and 14.3 μm at D90.

[0115] By weight, 7 parts of food-grade sodium carboxyethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 8 parts of food-grade water-soluble pigment amaranth (Hubei Kangleyuan Biotechnology Co., Ltd.), and 15 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 10 parts of deionized water, and stirred to form a uniform mixed colorant;

[0116] By weight, 20 parts of food-grade beeswax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 10 parts of food-grade microcrystalline wax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 7 parts of food-grade almond oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade distearic acid glyceryl (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 100 minutes to obtain a uniform mixture;

[0117] The mixture obtained in the above step was heated to 90° C. until it was completely melted, and 7 parts of food-grade talcum powder (Huiteng Chemical Official Flagship Store) and 6 parts of antibacterial agent were slowly and evenly added under stirring, and the stirring was continued for 45 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0118] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 13° C.

[0119] Embodiment 3:

[0120] By weight, 4 parts of silver nitrate (Shanghai Aladdin Biochemical Technology Co., Ltd.) were added to 45 parts of deionized water, stirred at 1500 rpm for 80 min, then 5 parts of sorbitan monooleate (Mingrui Group Co., Ltd.) were added, stirred at 1500 rpm for 80 min, and then 46 parts of food-grade zinc oxide with an octahedral structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0121] The obtained solid mixture was dried in a 50°C oven in the dark for 35 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 800°C for 15 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 10.1 μm at D50 and 14.2 μm at D90.

[0122] By weight, 5 parts of food-grade polyvinyl pyrrolidone (Jiangsu Caiwei Biotechnology Co., Ltd.), 5 parts of food-grade water-soluble pigment brilliant blue (Hubei Kangleyuan Biotechnology Co., Ltd.), and 9 parts of food-grade isopropanol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0123] By weight, 10 parts of food-grade microcrystalline wax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 12 parts of food-grade candelilla wax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 7 parts of corn oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 15 parts of food-grade sorbitan monooleate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 110°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 80°C for 100 minutes to obtain a uniform mixture;

[0124] The mixture obtained in the above step was heated to 90° C. until it was completely melted, and 15 parts of food-grade magnesium carbonate (Huiteng Chemical Official Flagship Store) and 7 parts of antibacterial agent were slowly and evenly added under stirring, and the mixture was stirred for 45 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0125] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 10°C.

[0126] Embodiment 4:

[0127] By weight, 3 parts of silver nitrate (Shanghai Aladdin Biochemical Technology Co., Ltd.) were added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of sorbitan monopalmitate (Mingrui Group Co., Ltd.) were added, stirred at 1500 rpm for 80 min, and then 37 parts of food-grade activated carbon with a porous structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1000 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0128] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 1000°C for 20 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 9.5 μm at D50 and 14.1 μm at D90.

[0129] By weight, 7 parts of food-grade guar gum (Jiangsu Caiwei Biotechnology Co., Ltd.), 5 parts of food-grade water-soluble pigment natural carotene (Hubei Kangleyuan Biotechnology Co., Ltd.), and 15 parts of food-grade n-butanol (Jinan Jinsheng New Materials Co., Ltd.) were added to 12 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0130] By weight, 5 parts of food-grade Fischer-Tropsch wax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 25 parts of food-grade beeswax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 7 parts of food-grade tea seed oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 11 parts of food-grade sorbitan monopalmitate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 110°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 80°C for 100 minutes to obtain a uniform mixture;

[0131] The mixture obtained in the above step was heated to 90° C. until it was completely melted, and 8 parts of food-grade white carbon black (Huiteng Chemical Official Flagship Store) and 5 parts of antibacterial agent were slowly and evenly added under stirring, and the mixture was stirred for 60 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0132] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 15°C.

[0133] Embodiment 5:

[0134] By weight, 2 parts of silver chloride (Shanghai Aladdin Biochemical Technology Co., Ltd.) were added to 40 parts of deionized water, stirred at 1300 rpm for 100 min, then 8 parts of fatty acid glyceride (Mingrui Group Co., Ltd.) were added, stirred at 1300 rpm for 100 min, and then 50 parts of food-grade silicon dioxide with a regular tetrahedral structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 80 min to obtain a uniformly mixed semi-solid mixture.

[0135] The obtained solid mixture was dried in a 35°C oven in the dark for 45 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 900°C for 24 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 11 μm at D50 and 15 μm at D90.

[0136] By weight, 4 parts of food-grade gum arabic (Jiangsu Caiwei Biotechnology Co., Ltd.), 5 parts of food-grade water-soluble pigment indigo (Hubei Kangleyuan Biotechnology Co., Ltd.), and 8 parts of food-grade ethanol (Jinan Jinsheng New Materials Co., Ltd.) were added to 8 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0137] By weight, 40 parts of food-grade microcrystalline wax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 4 parts of coconut oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 20 parts of food-grade sorbitan monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 90°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 100°C for 70 minutes to obtain a uniform mixture;

[0138] The mixture obtained in the above step was heated to 80°C until it was completely melted, and 7 parts of food-grade aluminum hydroxide (Huiteng Chemical Official Flagship Store) and 4 parts of antibacterial agent were slowly and evenly added under stirring, and the stirring was continued for 40 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0139] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 10°C.

[0140] Example 6

[0141] By weight, 1 part of silver sulfate (Shanghai Aladdin Biochemical Technology Co., Ltd.) was added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of glyceryl monostearate (Mingrui Group (Henan) Co., Ltd.) were added, stirred at 1000 rpm for 80 min, and then 39 parts of food-grade titanium dioxide with a hexagonal lattice structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0142] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 800°C for 10 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 9 μm at D50 and 14 μm at D90.

[0143] By weight, 3 parts of food-grade sodium carboxymethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 10 parts of food-grade water-soluble pigment lemon yellow (Hubei Kangleyuan Biotechnology Co., Ltd.), and 8 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0144] By weight, 34 parts of food-grade paraffin wax (Cangzhou Dongfang Beeswax Co., Ltd.), 3 parts of food-grade castor oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade glyceryl monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 90 minutes to obtain a uniform mixture;

[0145] The uniform mixture obtained in the above step was heated to 85° C. until it was completely melted, and 12.2 parts of food-grade calcium carbonate (Huiteng Chemical Official Flagship Store) and 4.8 parts of antibacterial agent were slowly and evenly added under stirring, and the mixture was stirred for 45 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0146] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 13° C.

[0147] Example 7

[0148] By weight, 1 part of silver sulfate (Shanghai Aladdin Biochemical Technology Co., Ltd.) was added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of glyceryl monostearate (Mingrui Group (Henan) Co., Ltd.) were added, stirred at 1000 rpm for 80 min, and then 39 parts of food-grade zinc oxide with an octahedral structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0149] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 800°C for 10 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 9 μm at D50 and 14 μm at D90.

[0150] By weight, 3 parts of food-grade sodium carboxymethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 10 parts of food-grade water-soluble pigment lemon yellow (Hubei Kangleyuan Biotechnology Co., Ltd.), and 8 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0151] By weight, 34 parts of food-grade paraffin wax (Cangzhou Dongfang Beeswax Co., Ltd.), 3 parts of food-grade castor oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade glyceryl monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 90 minutes to obtain a uniform mixture;

[0152] The uniform mixture obtained in the above step was heated to 85° C. until it was completely melted, and 12.2 parts of food-grade calcium carbonate (Huiteng Chemical Official Flagship Store) and 4.8 parts of antibacterial agent were slowly and evenly added under stirring, and the mixture was stirred for 45 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0153] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 10°C.

[0154] Example 8

[0155] By weight, 1 part of silver sulfate (Shanghai Aladdin Biochemical Technology Co., Ltd.) was added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of glyceryl monostearate (Mingrui Group (Henan) Co., Ltd.) were added, stirred at 1000 rpm for 80 min, and then 39 parts of food-grade activated carbon with a porous structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0156] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 800°C for 10 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 9 μm at D50 and 14 μm at D90.

[0157] By weight, 3 parts of food-grade sodium carboxymethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 10 parts of food-grade water-soluble pigment lemon yellow (Hubei Kangleyuan Biotechnology Co., Ltd.), and 8 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0158] By weight, 34 parts of food-grade paraffin wax (Cangzhou Dongfang Beeswax Co., Ltd.), 3 parts of food-grade castor oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade glyceryl monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 90 minutes to obtain a uniform mixture;

[0159] The uniform mixture obtained in the above step was heated to 85° C. until it was completely melted, and 12.2 parts of food-grade calcium carbonate (Huiteng Chemical Official Flagship Store) and 4.8 parts of antibacterial agent were slowly and evenly added under stirring, and the stirring was continued for 50 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0160] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 15°C.

[0161] Comparative Example 1:

[0162] The main difference from Example 1 is that the antibacterial agent is prepared by a conventional method without calcination.

[0163] By weight, 1 part of silver sulfate (Shanghai Aladdin Biochemical Technology Co., Ltd.) was added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of glyceryl monostearate (Mingrui Group Co., Ltd.) were added, stirred at 1000 rpm for 80 min, and then 39 parts of food-grade silicon dioxide with a regular tetrahedral spatial network structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0164] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, which is a silver ion antibacterial agent. The silver ion antibacterial agent has a D50 particle size of 12 μm and a D90 particle size of 16 μm.

[0165] By weight, 3 parts of food-grade sodium carboxymethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 10 parts of food-grade water-soluble pigment lemon yellow (Hubei Kangleyuan Biotechnology Co., Ltd.), and 8 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0166] By weight, 34 parts of food-grade paraffin wax (Cangzhou Dongfang Beeswax Co., Ltd.), 3 parts of food-grade castor oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade glyceryl monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 90 minutes to obtain a uniform mixture;

[0167] The uniform mixture obtained in the above step was heated to 85° C. until it was completely melted, and 12.2 parts of food-grade calcium carbonate (Huiteng Chemical Official Flagship Store) and 4.8 parts of antibacterial agent were slowly and evenly added under stirring, and the stirring was continued for 50 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0168] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 15°C.

[0169] Comparative Example 2:

[0170] The main difference from Example 2 is that no antibacterial agent is added, and beeswax and talcum powder are used to make up 100 parts.

[0171] By weight, 7 parts of food-grade sodium carboxyethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 8 parts of food-grade water-soluble pigment amaranth (Hubei Kangleyuan Biotechnology Co., Ltd.), and 15 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 10 parts of deionized water, and stirred to form a uniform mixed colorant;

[0172] By weight, 25 parts of food-grade beeswax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 10 parts of food-grade microcrystalline wax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 7 parts of food-grade almond oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade distearic acid glyceryl (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 100 minutes to obtain a uniform mixture;

[0173] The mixture obtained in the above step was heated to 90° C. until it was completely melted, and 8 parts of food-grade talcum powder (Huiteng Chemical Official Flagship Store) was slowly and evenly added under stirring, and the stirring was continued for 45 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0174] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 13° C.

[0175] Comparative Example 3:

[0176] The main difference from Example 1 is that no water-soluble pigment is used and the pigment needs to be ground.

[0177] By weight, 1 part of silver sulfate (Shanghai Aladdin Biochemical Technology Co., Ltd.) was added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of glyceryl monostearate (Mingrui Group (Henan) Co., Ltd.) were added, stirred at 1000 rpm for 80 min, and then 39 parts of food-grade silicon dioxide with a regular tetrahedral spatial network structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0178] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 800°C for 10 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 9 μm at D50 and 14 μm at D90.

[0179] By weight, 3 parts of food-grade sodium carboxymethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.) and 8 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a binder mixture;

[0180] By weight, 34 parts of food-grade paraffin wax (Cangzhou Dongfang Beeswax Glue Co., Ltd.), 3 parts of food-grade castor oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade glyceryl monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax. Then, 10 parts of food-grade pigment lemon yellow (Hubei Kangleyuan Biotechnology Co., Ltd.) were slowly added under heating and stirring, and stirred at 95°C for 90 minutes to obtain a uniform mixture.

[0181] The uniform mixture obtained above is ground into a fine granular solid with a particle size of 20-30 μm by a three-roll mill;

[0182] The fine granular solid obtained in the above step is heated to 90°C to completely melt it, and the binder mixture is added. 12.2 parts of food-grade calcium carbonate (Huiteng Chemical Official Flagship Store) is slowly and evenly added under stirring, and the stirring is continued for 50 minutes until a uniform liquid slurry mixture with no visible agglomerates is obtained;

[0183] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 15°C.

[0184] Comparative Example 4:

[0185] The main difference from Example 1 is that by changing the calcination process conditions, antibacterial agent particles with smaller particle size are obtained.

[0186] By weight, 1 part of silver sulfate (Shanghai Aladdin Biochemical Technology Co., Ltd.) was added to 50 parts of deionized water, stirred at 1000 rpm for 80 min, then 10 parts of glyceryl monostearate (Mingrui Group Co., Ltd.) were added, stirred at 1000 rpm for 80 min, and then 39 parts of food-grade silicon dioxide with a regular tetrahedral spatial network structure (Ningbo Yipin Biotechnology Co., Ltd.) were added, and stirred at 1500 rpm for 100 min to obtain a uniformly mixed semi-solid mixture.

[0187] The obtained solid mixture was dried in a 45°C oven in the dark for 40 hours to obtain a dried product, and then moved to a muffle furnace and calcined at 1400°C for 40 hours to obtain a silver ion antibacterial agent. The silver ion antibacterial agent calcined at high temperature had a particle size of 5 μm at D50 and 11 μm at D90.

[0188] By weight, 3 parts of food-grade sodium carboxymethyl cellulose (Jiangsu Caiwei Biotechnology Co., Ltd.), 10 parts of food-grade water-soluble pigment lemon yellow (Hubei Kangleyuan Biotechnology Co., Ltd.), and 8 parts of food-grade propylene glycol (Jinan Jinsheng New Materials Co., Ltd.) were added to 15 parts of deionized water, and stirred to mix well to form a uniform mixed colorant;

[0189] By weight, 34 parts of food-grade paraffin wax (Cangzhou Dongfang Beeswax Co., Ltd.), 3 parts of food-grade castor oil (Guangzhou Shengyuan Cosmetics Raw Materials Co., Ltd.) and 10 parts of food-grade glyceryl monostearate (Mingrui Group Co., Ltd.) were mixed and melted at a melting temperature of 100°C, and the mixture was stirred and mixed to obtain a mixed wax, and then the mixed colorant was slowly added under heating and stirring, and the mixture was stirred at 95°C for 90 minutes to obtain a uniform mixture;

[0190] The uniform mixture obtained in the above step was heated to 85° C. until it was completely melted, and 12.2 parts of food-grade calcium carbonate (Huiteng Chemical Official Flagship Store) and 4.8 parts of antibacterial agent were slowly and evenly added under stirring, and the stirring was continued for 50 minutes until a uniform liquid slurry mixture with no visible agglomerates was obtained;

[0191] The uniform mixture is subjected to a molding process to obtain the colorful stick, and the cooling temperature during molding is 15°C.

[0192] Experimental results:

[0193] The colorful sticks prepared in Examples 1-8 and Comparative Examples 1-4 were evaluated according to the following methods to conduct softening point, drawing properties and safety performance tests.

[0194] The softening point test is carried out with an asphalt softening point tester. The sample is melted and poured into two iron circles respectively. After solidification, it is flattened and a steel ball is placed on the sample round block. It is placed flat in a glass container and heated with water. The water temperature is measured with a thermometer. The oil painting stick material in the small iron circle is softened by heat. When the steel ball falls in, the temperature shown on the thermometer is the softening point of the oil painting stick, which is required to be no less than 50°C.

[0195] The depiction test is to use the sample to evenly paint an area of ​​50mm*50mm on the sketch paper, and evaluate the tinting power and drawing properties: the color painted on the paper surface must be bright, bright, the coating on the paper surface must be uniform, the depiction must be smooth, the coating must be uniform, there must be no obvious other particles or foreign matter, it must be easy to stick to the paper surface, the painting can be repeated, and wiping with fingers, cloth or paper must produce a diffusion effect and have a powdery feel.

[0196] The evaluation criteria for depiction specifically include coloring power and painting quality, and the evaluation criteria are as follows:

[0197] The tinting strength test is to paint samples on various surfaces such as paper, skin, cloth, plastic, glass, marble and metal, and rate the tinting strength:

[0198] Advantages: Can be painted on various media surfaces, with good coloring power;

[0199] Good: It is easy to color on rough surfaces such as paper and cloth, but difficult to color on smooth surfaces. The color can only be revealed after repeated painting.

[0200] Poor: Can only be painted on paper and cloth, not on other smooth surfaces.

[0201] The painting test is to evenly paint a sample on a 50mm*50mm area on sketch paper and rate the depictability:

[0202] Excellent: smooth depiction, bright colors, and evenly painted colors;

[0203] Good: The drawing is smooth, but the color is average and the color of the sample is uneven;

[0204] Poor: The drawing is not smooth, the color is dull, and the color of the painting is uneven.

[0205] The safety performance is tested in accordance with the provisions of GB 21027-2020.

[0206] The test results of various properties of the colorful sticks prepared in Examples 1-8 and Comparative Examples 1-4 are as follows:

[0207] Test results of various performances of the colorful stick

[0208]

[0209] In the above tests, the softening point is used to evaluate whether the colorful sticks meet the basic shaping and quality requirements; the tinting strength is used to evaluate the color brightness and layer uniformity; the painting property is used to evaluate the dispersion and distribution uniformity of pigments and fillers.

[0210] Through testing, the softening point performance of the embodiments and comparative examples all meet the basic requirements of the standards, and the safety performance all passes the required values ​​for migration elements in GB21027.

[0211] Passed the test: The safety performance of the embodiments and the comparative examples all passed the required values ​​for migration elements in GB21027. In terms of drawing performance, the drawing performance of embodiments 1-8 was excellent.

[0212] In order to further prove the advantage of silver ion release efficiency brought by the present invention, the silver ion release rate of Example 1, Comparative Example 1, Comparative Example 3 and Comparative Example 4 was tested:

[0213] The group of Example 1 was added as test group 1, the group of Comparative Example 1 was added as test group 2, the group of Comparative Example 3 was added as test group 3, and the group of Comparative Example 4 was added as test group 4. The testing method was to take 10 g of the finished product and place it in a simulated body fluid. After a period of action, the silver ion content in the simulated body fluid was measured by inductively coupled plasma mass spectrometry (ICP-MS), wherein the silver ion content in the finished product was measured by energy dispersive X-ray spectrometer (EDX).

[0214] The experimental results are as follows:

[0215]

[0216] By testing the silver ion release rate, it was found that the release rate of test group 1 was lower and the antibacterial stability was better, while the release rates of test groups 2-4 were higher, which affected the antibacterial effect.

[0217] Comparing the test results of test group 1 and test group 2, the colorful stick using the calcination process of the present invention has a significantly lower release rate than the conventional product with added silver ion antibacterial agent (without calcination treatment), and the product with conventional method adding antibacterial agent has a release rate beyond the scope of the present invention. Further comparing the performance test results of Example 1 and Comparative Example 1, it is found that the color of Comparative Example 1 is dim, the coloring is uneven, and the painting property is lower than that of Example 1. This is because, compared with Example 1, Comparative Example 1 does not calcine the silver ion antibacterial agent after drying, resulting in the load of metal ions on the carrier material being not strong enough, and the metal ions cannot form a stable chelate, resulting in a high release rate of silver ions, causing the phenomenon of silver ion discoloration and blackening, thereby causing the overall color to be relatively dim relative to the product color after calcination, affecting the overall painting property. Therefore, the present invention adopts a new preparation process of silver ion antibacterial agent, which can improve the silver ions in the carrier so that it can be added to the system without affecting the painting color experience of the colorful stick.

[0218] Comparing the test results of test group 1 and test group 4, the release rate of test group 4 is much higher than that of test group 1, which is beyond the scope of the present invention, and the antibacterial stability is poor. This is because compared with Example 1, comparative example 4 selected a silver ion antibacterial agent with a smaller particle size. Although the antibacterial agent particles with a smaller particle size have a larger specific surface area, a larger effective area that can react with bacteria, and better antibacterial properties, too small a particle size will result in too fast a release rate and fail to achieve long-term antibacterial effects.

[0219] Comparing the test results of test group 1 and test group 3, the silver ion release rate of test group 3 is higher than that of test group 1. It can be seen that grinding will have an adverse effect on the silver ion release rate in the antibacterial agent to a certain extent, reducing the antibacterial stability of the product. Further comparing the tinting power and painting properties of Example 1 and Comparative Example 3, it is found that the various properties of the two are equivalent, indicating that the product prepared by the improved production process of the present invention can still maintain excellent performance compared with the traditional production process that requires grinding. The optimized production process can bring simpler production steps and reduce production costs. At the same time, the non-grinding method can improve the antibacterial stability and give the product better antibacterial properties.

[0220] The silver ion release rate of Examples 1-8 was tested for 7 days, and the test results are as follows:

[0221]

[0222] The test results of Examples 1-8 show that the release rates are all within the scope of the present invention. In particular, by comparing the test data of Example 1 with that of Examples 6-8, under the premise that the other parameters are the same, only the carrier type is changed, and it is found that the release rate of Example 1 is the slowest, and the antibacterial agent stability effect is good. It can be seen that regular tetrahedral silica has structural advantages, can load silver ions more stably, the silver ion release rate is relatively balanced, and the antibacterial stability effect is good, so it is the best choice.

[0223] At the same time, according to the "Technical Specifications for Disinfection" 2.1.1.7, the test bacteria were Escherichia coli and Staphylococcus aureus. A bacterial suspension containing 1×108cfu / ml to 5×108cfu / ml was selected for the quantitative bacterial sterilization test. The detection method was to use a small amount of product mixed evenly in the bacterial suspension, act for 10 minutes, test the number of colonies to calculate the killing rate, and repeat the experiment three times. The experimental temperature was 20±1°C.

[0224] The group without adding the colorful stick was used as the blank group, the group with adding the product in comparative example 2 was used as the test group 1, and the groups with adding embodiments 1-8 were used as test groups 2-9.

[0225] The results of the experimental test of colony count (unit: cfu / ml) are as follows:

[0226]

[0227]

[0228] According to the results of sterilization experiments, the killing rate of Escherichia coli and Staphylococcus aureus of the colorful sticks with added antibacterial ingredients is greater than 99.99% compared to products without additives, which gives the product a higher safety attribute. At the same time, the sterilization property can also bring about functional improvements.

[0229] Those skilled in the art should note that the embodiments described in the present invention are merely exemplary, and various other substitutions, changes and improvements may be made within the scope of the present invention. Therefore, the present invention is not limited to the above embodiments, but only to the claims.

Claims

1. A food-grade colorful stick, characterized in that: By weight, the food-grade colorful stick comprises: Food grade wax: 10-50 parts, preferably 20-40 parts; Food grade vegetable oil: 1-10 parts, preferably 3-7 parts; Food grade binder: 1-10 parts, preferably 3-7 parts; Food grade alcohol: 5-20 parts, preferably 8-15 parts; Food grade filler: 5-20 parts, preferably 7-17 parts; Food grade emulsifier: 5-30 parts, preferably 10-20 parts; Food grade water-soluble pigment: 3-15 parts, preferably 5-10 parts; Deionized water: 5-20 parts, preferably 8-15 parts; Food grade antibacterial agent: 1-10 parts, preferably 4-8 parts.

2. The food-grade colorful stick according to claim 1, characterized in that: By weight, the food-grade antibacterial agent includes: Silver ion salt: 0.1-10 parts, preferably 1-5 parts; Food grade emulsifier: 1-15 parts, preferably 5-10 parts; Deionized water: 10-70 parts, preferably 20-50 parts; Food grade carrier: 20-60 parts, preferably 30-50 parts.

3. The food-grade colorful stick according to claim 2, characterized in that: The particle size of the food-grade antibacterial agent is D50 of 7-13 μm, preferably 9-11 μm, and D90 of 13-20 μm, preferably 14-15 μm.

4. The food-grade colorful stick according to claim 2, characterized in that: The food-grade carrier is a carrier with a three-dimensional crystal structure or a porous structure, preferably one or more selected from food-grade titanium dioxide, food-grade zinc oxide, food-grade silicon dioxide, and food-grade activated carbon; more preferably, it is food-grade silicon dioxide with a regular tetrahedral spatial network structure.

5. The food-grade colorful stick according to claim 3, characterized in that: The silver ion release rate of the food-grade colorful stick is 0.01-0.1% / 7d in 7 days, and the preferred range is 0.03-0.07% / 7d.

6. The food-grade colorful stick according to claim 2, characterized in that: The silver ion salt is one or more selected from silver sulfate, silver nitrate, and silver chloride; The food-grade emulsifier is one or more selected from glyceryl monostearate, glyceryl distearate, fatty acid glycerides, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate and the like.

7. The food-grade colorful stick according to claim 2, characterized in that: The preparation method of the food-grade antibacterial agent comprises the following steps: Step 1: Add silver ion salt to deionized water and stir until it is completely dissolved; Step 2: Add an emulsifier to the silver ion solution in step 1, stir evenly, then add a carrier, mix and stir evenly to form a semi-solid mixture; Step 3: The semi-solid mixture is dried in a dark place, and then the dried product is moved to a muffle furnace for high-temperature calcination, and the silver ion antibacterial agent is obtained after the calcination is completed.

8. The food-grade colorful stick according to claim 7, characterized in that: In the steps 1 and 2, the stirring speed is 500-2000 rpm, preferably 1000-1500 rpm; the stirring time is 50-120 min, preferably 80-100 min; In step 3, the drying treatment temperature is 30-60°C, preferably 45-50°C; the drying time is 24-48h, preferably 35-40h; the calcination temperature is 600-1000°C, preferably 800-1000°C, and the calcination time is 5-36h, preferably 10-24h.

9. The food-grade colorful stick according to claim 1, characterized in that: The food-grade wax is one or more food-grade waxes selected from paraffin, beeswax, microcrystalline wax, montan wax, worm wax, wood wax, Japan wax, carnauba wax, candelilla wax, Fischer-Tropsch wax, polyethylene wax, polypropylene wax, ethylene-vinyl acetate copolymer wax, oxidized polyethylene wax, etc.

10. The food-grade colorful stick according to claim 1, characterized in that: The food-grade vegetable oil is one or more food-grade oils selected from olive oil, coconut oil, castor oil, cottonseed oil, soybean oil, sesame oil, almond oil, peanut oil, corn oil, rice bran oil, tea seed oil, sea buckthorn oil, avocado oil, kuju oil, nut oil, walnut oil, cocoa butter and the like.

11. The food-grade colorful stick according to claim 1, characterized in that: The food-grade binder is one or more food-grade binders selected from sodium carboxymethyl cellulose, sodium carboxyethyl cellulose, polyvinyl pyrrolidone, guar gum, gum arabic, xanthan gum, and the like.

12. The food-grade colorful stick according to claim 1, characterized in that: The food-grade alcohol is one or more food-grade alcohols selected from ethanol, propylene glycol, glycerol, isopropanol, benzyl alcohol, phenylethyl alcohol, isopropanol, n-butanol and the like.

13. The food-grade colorful stick according to claim 1, characterized in that: The food-grade filler is one or more food-grade fillers selected from calcium carbonate, magnesium carbonate, kaolin, talcum powder, white carbon black, aluminum silicate, aluminum hydroxide, barium sulfate and the like.

14. The food-grade colorful stick according to claim 1, characterized in that: The food-grade emulsifier is one or more selected from glyceryl monostearate, glyceryl distearate, fatty acid glycerides, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate and the like.

15. The food-grade colorful stick according to claim 1, characterized in that: The food-grade water-soluble pigment is one or more selected from capsicum red, turmeric, natural carotene, lac red, cochineal red, sunset yellow, lemon yellow, quinoline yellow, amaranth, carmine, erythrosine, allura red, brilliant blue, indigo and the like.

16. A method for preparing the food-grade colorful stick according to any one of claims 1 to 15, comprising the following steps: Step a: adding a food-grade binder, a food-grade water-soluble pigment and a food-grade alcohol into deionized water and stirring and dissolving them to form a uniform mixed colorant; Step b: Mix and melt the food-grade wax, the vegetable oil and the food-grade emulsifier, stir and mix them evenly to obtain a mixed wax, and after the mixed wax is completely melted, add the evenly mixed colorant obtained in step a, stir and mix them evenly to obtain a uniform mixture; in, The emulsifier added in step b is a food-grade emulsifier other than the food-grade emulsifier in the food-grade antibacterial agent; Step c: slowly and evenly adding the food-grade filler and the antimicrobial agent to the uniform mixture obtained in step b under stirring, and continuously stirring until a uniform liquid slurry mixture with no visible agglomerates is obtained; Step d: The uniform mixture obtained in step c is subjected to a molding process to obtain the food-grade colorful stick.

17. The method for preparing a food-grade colorful stick according to claim 16, characterized in that: in, The mixing and melting in step b is carried out at a heating temperature of 80-110° C., preferably 90-100° C., and the stirring time is 60-120 min, preferably 70-100 min; In step c, the stirring is performed at a heating temperature of 70-95°C, preferably 80-90°C, and the stirring time is 30-60 minutes, preferably 40-50 minutes; The molding process in step d is carried out at a cooling temperature of 5-25°C, preferably 10-15°C.

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