A clear, odorless, concentrated sterilized bead-in-jelly content

Abstract

The present application relates to the field of daily chemical products, and discloses a light-color transparent odorless concentrated sterilization bead content, which comprises the following components in percentage by mass: p-chloro-m-xylenol 15-25%, non-ionic surfactant 0-5%, anionic surfactant containing at least C21 dibasic acid 10-20%, alcohol solvent containing at least isohexyl alcohol 43-55%, inorganic alkali agent 3-5%, bacteriostatic agent 0-2%, essence 0-2%, and water in remainder amount. The concentrated sterilization bead content of the present application uses inorganic alkali to replace organic amine alkali agent, so that the product appearance is stable and transparent light color under low cost conditions; the present application uses the combination of "non-ionic surfactant+C21 dibasic acid+isohexyl alcohol" to replace alcohol and ether solvents, so that the p-chloro-m-xylenol is significantly solubilized under the premise of no odor and safety.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products, and in particular to the contents of a light-colored, transparent, odorless concentrated antibacterial granule. Background Technology

[0002] With the increasing pursuit of quality of life in modern society, public and home hygiene conditions are receiving more and more attention. The demand for disinfection in daily life is also growing. High-concentration disinfectants can greatly facilitate daily life. However, because disinfectants such as 84 disinfectant or alcohol can easily cause fabric fading and reduced lifespan, they cannot achieve the desired disinfection function during fabric washing. Furthermore, newer fabric disinfectants such as Dettol, due to their lower dilution ratio, often require larger quantities when washing clothes, which presents certain inconveniences.

[0003] Concentrated antibacterial detergent pods are a new type of antibacterial product, gradually gaining popularity among consumers due to their concentrated properties. Currently, concentrated detergent products generally use organic amines as alkalis because organic amines are liquid, unlike inorganic alkalis which need to be dissolved in water before addition. For concentrated detergent pods, the water content is crucial to their formulation; too much water makes it difficult for them to be coated with a water-soluble film. However, in preliminary experiments, the applicant found that applying organic amines to concentrated products resulted in poor color stability, a tendency to yellow, and a significant impact on the product's appearance, failing to meet the aesthetic requirements of modern consumers. While reducing agents such as sodium sulfite can be added to stabilize the product's color, this would significantly increase costs.

[0004] Furthermore, while p-chloro-m-xylenol is a known antibacterial agent, concentrated antibacterial laundry products using it as the main antibacterial ingredient often require the addition of ether solvents to enhance its solubility. However, ethers have a strong odor, which can create an unpleasant smell experience for consumers. On the other hand, even after washing and antibacterial treatment, bacteria can still come into contact with and multiply on the fabric for some time. The applicant found that p-chloro-m-xylenol primarily focuses on killing bacteria, but its ability to inhibit bacterial growth and reproduction over a long period is weak. Therefore, it cannot provide a long-lasting inhibitory effect on bacterial growth and reproduction after washing. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a light-colored, transparent, and odorless concentrated antibacterial granule. The concentrated antibacterial granule of this invention uses an inorganic alkali instead of organic amine alkali agents, achieving a stable, transparent, light-colored appearance at low cost. Furthermore, this invention employs a combination of "nonionic surfactant + C21 diacid + isohexyl glycol" without using alcohols or ethers for solubilization, achieving a significant solubilization effect on chloro-m-xylenol without introducing odors and ensuring safety.

[0006] The specific technical solution of this invention is as follows: In a first aspect, the present invention provides a light-colored, transparent, odorless concentrated antibacterial granule containing the following components by mass percentage: 15-25% p-chloro-m-xylenol, 0-5% nonionic surfactant (excluding 0), 10-20% anionic surfactant containing at least C21 diacid, 43-55% alcohol solvent containing at least isohexyl glycol, 3-5% inorganic alkali agent, 0-2% antibacterial agent, 0-2% fragrance, and 5-10% water.

[0007] To address the drawback of organic amine alkalis in concentrated gel beads, which can easily cause yellowing and turbidity, thus affecting the product's color and transparency, this invention discovers that replacing organic amine alkalis with inorganic alkalis can significantly delay the yellowing process without the addition of a reducing agent. This allows for a transparent, light-colored product appearance at a low cost, better meeting consumer aesthetic preferences. Compared to organic amines, inorganic alkalis have the disadvantage of requiring water for dissolution, increasing the water content in the formulation and potentially affecting the dissolution of the water-soluble gel membrane in the concentrated gel beads. To address this, the applicant has controlled the inorganic alkali content at a low level and optimized the formulation of other components to maximize the concentration of active ingredients, ensuring the entire system maintains high concentration characteristics and preventing the water-soluble gel membrane from dissolving due to excessive water content.

[0008] To address the shortcomings of current concentrated granules that use alcohols or ethers as solubilizers for p-chloro-m-xylenol, existing technologies typically use methanol or ethanol as solvents for solubilization in products containing p-chloro-m-xylenol. However, these alcohols are flammable and explosive, posing certain safety hazards. While using safer ether solvents such as dipropylene glycol butyl ether to replace methanol and ethanol can replace them, this results in a strong, difficult-to-mask odor. Ultimately, this invention discovers that using a combination of "nonionic surfactant + C21 diacid + isohexyl glycol" solves the solubilization problem for p-chloro-m-xylenol while avoiding the strong odor issue, and also offers higher safety.

[0009] To address the drawback of the poor long-term antibacterial effect of chlorometa-xylenol, this invention introduces an antibacterial agent into the system. This antibacterial agent can inhibit bacterial growth for a relatively long period of time, thereby giving the fabric a long-term antibacterial effect.

[0010] Preferably, the C21 dicarboxylic acid accounts for at least 2% of the total mass of the contents of the concentrated antibacterial granules; and the isohexanediol accounts for at least 20% of the total mass of the contents of the concentrated antibacterial granules.

[0011] This invention further discovered that, in order to effectively solubilize p-chloro-meta-xylenol without affecting the bactericidal and other properties of the system, it is necessary to further control the content of each substance in the combination of "nonionic surfactant + C21 diacid + isohexyl glycol". Specifically: (a) This invention ultimately controls the nonionic surfactant to ≤5%, because we found that excessively high content of nonionic surfactant will inhibit the bactericidal activity of p-chloro-meta-xylenol; (b) This invention controls the content of C21 diacid to ≥2%. If the content of C21 diacid is too low, it is impossible to effectively solubilize p-chloro-meta-xylenol; (c) This invention controls the content of isohexyl glycol to ≥20%. If the content of isohexyl glycol is too low, it is also impossible to effectively solubilize p-chloro-meta-xylenol.

[0012] Preferably, the structural formula of the C21 dicarboxylic acid is as follows:

[0013] Where X+Y=12, X≥0, Y≥0; one of R1 and R2 is a carboxyl group, and the other is hydrogen.

[0014] Preferably, the anionic surfactant further includes one or more of oleic acid, coconut oil fatty acid, dodecanoic acid, tetradecanoic acid, and hexadecanoic acid.

[0015] Preferably, the alcohol solvent also includes one or more of glycerol and propylene glycol.

[0016] Preferably, the inorganic alkali agent is one or more of potassium hydroxide and sodium hydroxide.

[0017] Preferably, the nonionic surfactant includes one or more of fatty alcohol polyoxyethylene ethers and alkyl glycosides.

[0018] Preferably, the antibacterial agent includes one or more of HP100 and modified colloidal sulfur.

[0019] Furthermore, the modified colloidal sulfur is sulfur powder coated with a microcrystalline cellulose-gum arabic grafted composite.

[0020] This invention innovatively incorporates modified colloidal sulfur into antibacterial cleaning products. Compared to traditional synthetic antibacterial agents, sulfur is naturally derived, less irritating, environmentally friendly, and safer. Furthermore, the modified colloidal sulfur of this invention is micron-sized sulfur powder encapsulated in a microcrystalline cellulose-gum arabic grafted compound. Compared to ordinary sulfur, this modified colloidal sulfur forms a uniform and stable structure within the product system and possesses antibacterial properties, fully leveraging the antibacterial efficacy of sulfur. On the other hand, the sulfur encapsulated in the microcrystalline cellulose-gum arabic grafted compound has a very low odor, and the encapsulation makes the sulfur's medicinal properties milder, while also providing a sustained-release effect, thus exhibiting a low sensitization rate. In addition, compared to ordinary colloidal sulfur, this invention, by introducing microcrystalline cellulose to modify the colloidal sulfur, offers advantages such as better thermal stability and a more uniform and stable colloidal sulfur dispersion system.

[0021] Preferably, the method for preparing the modified colloidal sulfur includes the following steps: Step 1: Add microcrystalline cellulose to an alkaline solution for pretreatment, filter, wash, dry and grind for later use; dissolve gum arabic in water to obtain gum arabic aqueous solution for later use.

[0022] Step 2: Mix the microcrystalline cellulose and gum arabic aqueous solution obtained in Step 1 at a mass ratio of 1:10-1:5, add concentrated sulfuric acid, stir and heat, after reaction, cool, wash until neutral, and dry to obtain microcrystalline cellulose-gum arabic grafted complex.

[0023] Step 3: Mix micron-sized sulfur powder and microcrystalline cellulose-gum arabic grafted composite at a mass ratio of 7:3-8:2, heat to the melting point of sulfur powder, stir and mix evenly, cool to room temperature, grind and sieve to obtain modified colloidal sulfur.

[0024] The reaction principle of the above process is as follows: the primary hydroxyl groups on the microcrystalline cellulose molecular structure and the carboxyl groups on gum arabic undergo an esterification reaction under the catalysis of concentrated sulfuric acid, thus combining to form a microcrystalline cellulose-gum arabic grafted complex. Finally, microcapsules are prepared using the microcrystalline cellulose-gum arabic grafted complex as the wall material and sulfur powder as the core material.

[0025] In existing technologies, colloidal sulfur is coated with gum arabic. While gum arabic molecules exhibit excellent film-forming properties, they are not heat-resistant and possess excellent water solubility. Therefore, colloidal sulfur coated solely with gum arabic is relatively susceptible to environmental factors, particularly affecting the stability of the O / W system. This invention, recognizing these shortcomings, introduces a microcrystalline cellulose component into the existing colloidal sulfur system. This effectively improves the crystallinity and thermodynamic properties of the outer wall of the colloidal material, enhancing thermal stability and thus preventing sulfur leakage, achieving a superior slow-release effect. Furthermore, sulfur powder coated with the microcrystalline cellulose-gum arabic grafted composite forms a more stable dispersion system compared to colloidal sulfur coated solely with gum arabic.

[0026] Secondly, the present invention provides a light-colored, transparent, odorless concentrated antibacterial gel bead, comprising the contents of the aforementioned concentrated antibacterial gel bead and a water-soluble gel film for encapsulating the contents.

[0027] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention uses inorganic alkali to replace organic amine alkali agents, which can significantly delay the yellowing process of the product without the addition of additional reducing agents, thereby making the product appear transparent and light-colored under low cost conditions, which is more in line with consumers' aesthetic preferences. In view of the problem that inorganic alkali will reduce the system concentration and increase the risk of premature dissolution of the gel film, this invention controls its content at a low level, and at the same time optimizes the formulation of other components in the system so that the whole system can still maintain high concentration characteristics and ensure that the water-soluble gel film is not dissolved prematurely.

[0028] (2) The present invention uses a combination of “nonionic surfactant + C21 dicarboxylic acid + isohexyl glycol” to replace alcohol and ether solvents, achieving a significant solubilizing effect of p-chloro-m-xylenol without causing odor and under the premise of safety.

[0029] (3) The present invention introduces an antibacterial agent into the system, which can inhibit the reproduction of bacteria for a long time, thereby giving the fabric a long-lasting antibacterial effect. Attached Figure Description

[0030] Figure 1 The images show the appearance of the formulations in Examples 8 and 14; the left image shows Example 8, and the right image shows Example 14. Detailed Implementation

[0031] The present invention will be further described below with reference to embodiments.

[0032] General Implementation Examples A light-colored, transparent, odorless concentrated antibacterial granule contains the following components by weight percentage: 15-25% p-chloro-m-xylenol, 0-5% nonionic surfactant (excluding 0), 10-20% anionic surfactant containing at least C21 diacid, 43-55% alcohol solvent containing at least isohexyl glycol, 3-5% inorganic alkali agent, 0-2% antibacterial agent, 0-2% fragrance, and 5-10% water.

[0033] Of these, C21 dicarboxylic acid accounts for at least 2% of the total mass of the concentrated antibacterial granules; and isohexyl glycol accounts for at least 20% of the total mass of the concentrated antibacterial granules.

[0034] As a preferred option, the structural formula of C21 dicarboxylic acid is:

[0035] Where X+Y=12, X≥0, Y≥0; one of R1 and R2 is a carboxyl group, and the other is hydrogen.

[0036] The anionic surfactants also include one or more of oleic acid, coconut oil fatty acids, dodecanoic acid, tetradecanoic acid, and hexadecanoic acid; the alcohol solvents also include one or more of glycerol and propylene glycol; the inorganic alkali agents are one or more of potassium hydroxide and sodium hydroxide; the nonionic surfactants include one or more of fatty alcohol polyoxyethylene ethers and alkyl glycosides; the antibacterial agents include one or more of HP100 and modified colloidal sulfur; further, the modified colloidal sulfur is sulfur powder coated with a microcrystalline cellulose-gum arabic grafted composite.

[0037] The preparation method of modified colloidal sulfur includes the following steps: Step 1: Add microcrystalline cellulose to an 8-12 wt% NaOH aqueous solution at a mass ratio of 1:8-12, stir for 3-7 hours, soak for 20-30 hours, filter, wash until neutral, vacuum dry, and grind for later use; dissolve gum arabic in water to obtain gum arabic aqueous solution for later use. Step 2: Mix the pretreated microcrystalline cellulose and gum arabic aqueous solution at a mass ratio of 1:10-1:5, add 5-15% concentrated sulfuric acid (by mass of microcrystalline cellulose), stir and heat, react for 6-10 hours, cool, wash until neutral, and vacuum dry to obtain the microcrystalline cellulose-gum arabic grafted complex. Step 3: Mix micron-sized sulfur powder and microcrystalline cellulose-gum arabic grafted composite at a mass ratio of 7:3-8:2, heat to the melting point of sulfur powder, stir and mix evenly, cool to room temperature, grind and pass through a 200-mesh sieve to obtain modified colloidal sulfur.

[0038] A light-colored, transparent, odorless concentrated antibacterial gel bead includes the contents of the aforementioned concentrated antibacterial gel bead and a water-soluble gel film for encapsulating the contents. Specific Implementation Using C21 dicarboxylic acid (X=5, Y=7, R1=carboxyl, R2=H), coconut oil fatty acid (DC1218), dodecanoic acid, and oleic acid as anionic surfactants, AEO-9 as a nonionic surfactant, and isohexyl glycol, propylene glycol, and glycerol as alcohol solvents, the low-temperature stability of the formulation (no precipitation, whitening, or freezing after one week at -5℃) and the solubilizing effect of p-chloro-m-xylenol (PCMX) (the stock solution is a uniform, single, and transparent liquid, and no precipitation occurs within 24 hours in a 1% aqueous solution) were investigated. The sterilization rate was tested according to the QB / T 2738-2012 quantitative sterilization test procedure for suspensions. The appearance and color were also tested (the initial color of the liquid was below 100Hz, and the appearance and color of the sample did not change significantly after one week at room temperature and 45℃). The long-term antibacterial test method was based on T / ZGXX 0004-2022 "Evaluation Method for Long-Term Antibacterial Effect of Daily Chemical Products".

[0040] Test Examples 1-5, Comparative Examples 6-7, Example 8 DC1218 15 / / / / / / / Lactosolic acid / 15 / / / / / / Oleic acid / / 15 15 15 15 15 15 C21 dicarboxylic acid / / / / / 0.5 1 2 AEO-9 10 10 10 8 5 5 5 5 PCMX 17 17 17 17 17 17 17 17 Isohexanediol 38.5 38.5 40 42 45 44 44 43 Propylene glycol 4.2 4.2 4.2 4.2 4.2 4.2 3.8 3.4 glycerin 6 6 6 6 6 6 6 6 monoethanolamine 4.5 4.5 3.3 3.3 3.3 3.5 3.7 4.1 pure water margin margin margin margin margin margin margin margin Sterilization rate × × × √ √ √ √ √ Low temperature stability × × √ √ √ √ √ √ Solubilization effect √ √ √ × × × × √ The results of Test Examples 1-3 show that when the surfactant content in the formulation is 25% (the sum of nonionic and anionic surfactants), the addition of approximately 40% isohexyl glycol can achieve solubilization of p-chlororesorcinol. While nonionic surfactants can increase the solubility of p-chlororesorcinol in the formulation, we also found that excessively high nonionic surfactant content can affect the activity of p-chlororesorcinol, thus impacting its bactericidal performance. Furthermore, the system exhibits poor low-temperature stability (when the anionic surfactants are DC1218 and dodecanoic acid). Therefore, the nonionic surfactant content in the formulation should not be too high. The results of Test Examples 4-5 indicate that, based on Test Example 3, when the nonionic surfactant content is reduced to 5%, the bactericidal rate can be significantly improved, but the solubilization effect on p-chlororesorcinol is simultaneously reduced. To improve the solubilization effect of p-chlororesorcinol while maintaining the bactericidal rate, C21 diacid was introduced while keeping the solvent proportion essentially unchanged. This reduced the nonionic surfactant content in the formulation without affecting its low-temperature stability. Comparative Examples 6-7 and Example 8 showed that increasing the amount of C21 diacid to 2% effectively improved the solubilization effect of the formulation on p-chlororesorcinol without affecting the bactericidal rate. This result also indirectly indicates that the total surfactant content and the ratio of anionic and nonionic surfactants in the formulation affect the bactericidal effect of the bactericide PCMX; the nonionic surfactant content should not exceed 5%. Example 8 illustrates that reducing the surfactant content affects the aqueous solution stability of the formulation; the proportion of C21 diacid in the formulation should not be less than 2%.

[0041] Comparative Examples 9-13, Examples 8 / 14 Oleic acid 15 15 15 15 15 15 15 C21 dicarboxylic acid 2 3 4 2 2 2 2 AEO-9 5 5 5 5 5 5 5 PCMX 17 17 17 17 17 17 17 Isohexanediol 43 41.5 40 35.5 25.5 20 42.1 Propylene glycol 3.4 3.4 3.4 3.4 5.5 11 3.4 glycerin 6 6 6 6 6 6 6 Sorbitol / / / 10 20 20 / monoethanolamine 4.1 4.5 4.9 4.1 4.0 4.0 / KOH / / / / / / 5 pure water margin margin margin margin / / margin Sterilization rate √ √ √ √ √ √ √ Low temperature stability √ √ × √ √ × √ Solubilization effect √ √ √ √ √ × √ Color × × × × × × √ Examples 8 and Comparative Examples 9-13 mainly studied the effect of different isohexanediol contents on the system in the presence of C21 diacids. The results showed that when the isohexanediol content in the formulation was not less than 20%, it had a good solubilizing effect on p-chlororesorcinol. In Example 14, replacing monoethanolamine with KOH effectively solved the problem of excessive yellowing or yellowing of the formulation (e.g., ...). Figure 1 As shown, the left figure is Example 8 and the right figure is Example 14. From left to right in the figures, they represent the states after being placed at 0°C, room temperature, and 45°C for one week, respectively. This is because when monoethanolamine is used in the formulation, the free amine is easily oxidized, which leads to a change in color.

[0042] Examples 14 / 18, Comparative Examples 15-17 Oleic acid 15 15 15 15 15 15 C21 dicarboxylic acid 2 2 3 4 2 2 AEO-9 5 5 5 5 5 5 PCMX 17 17 17 17 17 17 Isohexanediol 42.1 42.1 42.1 42.1 42.1 42.1 Propylene glycol 3.4 3.2 3 3.3 3.2 3.1 glycerin 6 6 6 6 6 6 KOH 5 5 5 5 5 5 HP 100 / 0.2 0.4 / / 0.2 Modified colloidal sulfur / / / 0.1 0.2 0.1 pure water margin margin margin margin margin margin Sterilization rate √ √ √ √ √ √ Low temperature stability √ √ √ × √ √ Solubilization effect √ √ √ √ √ × Color √ √ √ √ × √ Long-lasting antibacterial effect × × √ × √ √ The method for preparing the modified colloidal sulfur in the above embodiments is as follows: Step 1: Add microcrystalline cellulose to a 10wt% NaOH aqueous solution at a mass ratio of 1:10, stir for 5 hours, soak for 24 hours, filter, wash until neutral, vacuum dry, and grind for later use; dissolve gum arabic in water to obtain gum arabic aqueous solution for later use. Step 2: Mix the pretreated microcrystalline cellulose and gum arabic aqueous solution at a mass ratio of 1:10, add concentrated sulfuric acid of 10% of the mass of microcrystalline cellulose, stir and heat, react for 8 hours, cool, wash until neutral, and vacuum dry to obtain microcrystalline cellulose-gum arabic grafted complex. Step 3: Mix micron-sized sulfur powder and microcrystalline cellulose-gum arabic grafted composite at a mass ratio of 8:2, heat to the melting point of sulfur powder, stir and mix evenly, cool to room temperature, grind and pass through a 200-mesh sieve to obtain modified colloidal sulfur.

[0043] Test Examples 15-18 were further formulated with different types and amounts of antibacterial agents based on Example 14. The results showed that adding a certain amount of HP-100 and colloidal sulfur could achieve a long-lasting antibacterial effect. However, the presence of sulfur in the colloidal sulfur caused severe yellowing of the solution during long-term storage (Test Example 18), therefore its addition amount should not be too high (not exceeding 0.2%). Simultaneously, the combination of colloidal sulfur and HP 100 effectively reduced the amount of HP 100 required.

[0044] Unless otherwise specified, the raw materials and equipment used in this invention are all commonly used in the field; unless otherwise specified, the methods used in this invention are all conventional methods in the field.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A clear, non-odorous, concentrated germicidal beadlet-free content, characterized in that: Components consisting of the following mass percentages: 15-25% p-chloro-meta-xylenol Nonionic surfactant 0-5%, free of 0, Anionic surfactants containing at least 10-20% C21 dicarboxylic acid The alcohol solvent contains at least 43-55% isohexyl glycol. Inorganic alkali agent 3-5%, Antibacterial agent 0-2%, Fragrance 0-2%, Water balance; C21 dicarboxylic acid constitutes at least 2% of the total mass of the contents of the concentrated antibacterial beads, and its structural formula is: ； X+Y=12, X≥0, Y≥0; one of R1 and R2 is a carboxyl group, and the other is hydrogen; Isohexanediol accounts for 20-43% of the total mass of the contents of the concentrated antibacterial beads; The inorganic alkaline agent is one or more of potassium hydroxide and sodium hydroxide; Anionic surfactants also include one or more of oleic acid, coconut oil fatty acids, dodecanoic acid, tetradecanoic acid, and hexadecanoic acid; Alcohol solvents also include one or more of glycerol and propylene glycol; Nonionic surfactants include one or more of fatty alcohol polyoxyethylene ethers and alkyl glycosides.

2. The concentrated sterile bead-in-capsule contents of claim 1, wherein: The antibacterial agent includes HP100.

3. The concentrated sterile bead-in-capsule contents of claim 1, wherein: The antibacterial agent includes modified colloidal sulfur.

4. The contents of the concentrated antibacterial granules as described in claim 3, characterized in that: The modified colloidal sulfur is sulfur powder coated with a microcrystalline cellulose-gum arabic grafted composite.

5. The contents of the concentrated antibacterial granules as described in claim 4, characterized in that: The method for preparing the modified colloidal sulfur includes: Step 1: Add microcrystalline cellulose to an alkaline solution for pretreatment, filter, wash, dry and grind for later use; dissolve gum arabic in water to obtain gum arabic aqueous solution for later use. Step 2: Mix the microcrystalline cellulose and gum arabic aqueous solution obtained in Step 1 at a mass ratio of 1:10-1:5, add concentrated sulfuric acid, stir and heat, after reaction, cool, wash until neutral, and dry to obtain microcrystalline cellulose-gum arabic grafted complex. Step 3: Mix micron-sized sulfur powder and microcrystalline cellulose-gum arabic grafted composite at a mass ratio of 7:3-8:2, heat to the melting point of sulfur powder, stir and mix evenly, cool to room temperature, grind and sieve to obtain modified colloidal sulfur.

6. The contents of the concentrated antibacterial beads as described in claim 5, characterized in that: Step one is as follows: Add microcrystalline cellulose to an 8-12 wt% NaOH aqueous solution at a mass ratio of 1:8-12, stir for 3-7 hours, soak for 20-30 hours, filter, wash until neutral, vacuum dry and grind for later use; dissolve gum arabic in water to obtain gum arabic aqueous solution for later use.

7. The contents of the concentrated antibacterial beads as described in claim 5, characterized in that: Step 2 is as follows: Mix the pretreated microcrystalline cellulose and gum arabic aqueous solution at a mass ratio of 1:10-1:5, add concentrated sulfuric acid at 5-15% of the mass of microcrystalline cellulose, stir and heat, react for 6-10 hours, cool, wash until neutral, and vacuum dry to obtain microcrystalline cellulose-gum arabic grafted complex.

8. The contents of the concentrated antibacterial beads as described in claim 5, characterized in that: Step 3 is as follows: Mix micron-sized sulfur powder and microcrystalline cellulose-gum arabic grafted composite at a mass ratio of 7:3-8:2, heat to the melting point of sulfur powder, stir and mix evenly, cool to room temperature, grind and pass through a 200-mesh sieve to obtain modified colloidal sulfur.

9. A transparent, odorless, concentrated antibacterial granule, characterized in that: It includes the contents of concentrated antibacterial beads as described in any one of claims 1-8, and a water-soluble gel membrane encapsulating the contents of the concentrated antibacterial beads.

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