Antibacterial linen detergent

Abstract

The invention relates to the technical field of daily chemicals, in particular to an antibacterial linen detergent which comprises a surfactant, a builder, a unique composite antibacterial system and a composite biological enzyme preparation. The composite antibacterial system is formed by compounding a double-chain quaternary ammonium salt, a guanidine polymer and a plant-source antibacterial synergist according to a specific proportion, the composite antibacterial system and a biological enzyme preparation containing protease, lipase, amylase and cellulase generate a synergistic effect, and through a mechanism of first enzymolysis cleaning and then multi-target synergistic sterilization, the composite antibacterial system can be used for preparing a multi-target antibacterial agent under the low-temperature condition of 40-60 DEG C; the efficient decontamination on the linen and the broad-spectrum and lasting killing on bacteria and fungi can be realized, and the drug resistance risk of microorganisms is obviously reduced. The product does not contain a chlorine bleaching agent, is environment-friendly and safe, has small damage to fabrics, and is particularly suitable for hygienic washing of linen in the industries of hotels, hospitals and the like.

Description

Technical Field

[0001] This invention relates to the field of daily chemical products technology, and in particular to an antibacterial linen detergent. Background Technology

[0002] In public places such as hotels and hospitals, the hygiene of linens directly affects public health. Traditional linen detergents mainly focus on removing stains and oil, and their bactericidal ability relies heavily on high-temperature washing or the addition of chlorine bleach (such as sodium hypochlorite). However, high-temperature washing is energy-intensive and damages many fabric fibers; while chlorine bleach, although highly effective at killing bacteria, can easily cause fabrics to fade and become brittle, and residual chlorine may irritate the skin and react with organic matter to produce harmful byproducts, which is also environmentally unfriendly.

[0003] In the existing technology, some detergents with added single antibacterial agents (such as triclosan, certain quaternary ammonium salts) have also emerged. However, these antibacterial agents have the following problems: (1) They are prone to microbial resistance, and their antibacterial effect decreases after long-term use; (2) Their antibacterial spectrum may not be broad enough, and their effect on certain fungi or viruses is limited; (3) Some traditional antibacterial agents have poor biodegradability, which poses a risk of environmental accumulation; (4) Their antibacterial efficacy may be interfered with or masked in the washing environment of complex organic dirt.

[0004] Therefore, developing a linen detergent that can perform exceptionally well at normal washing temperatures (such as 40-60℃), combining high-efficiency stain removal, broad-spectrum and long-lasting antibacterial properties, low corrosion, and environmental friendliness, has become a pressing technical problem to be solved in this field. Summary of the Invention

[0005] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and provide an antibacterial linen detergent. This detergent, through a unique composite antibacterial system and the synergistic effect of biological enzymes, achieves deep cleaning and efficient sterilization in a single wash without relying on high temperatures and strong chlorine bleaching. Furthermore, the antibacterial effect is long-lasting, while causing minimal damage to linens and being environmentally friendly.

[0006] This invention provides the following technical solution: an antibacterial linen detergent, comprising the following components by weight percentage: Surfactant system: 20%-40%; Compound antibacterial system: 3%-10%; Compound biological enzyme preparations: 2%-8%; Detergent and alkali additives: 15%-30%; Chelating agent: 1%-5%; Corrosion inhibitor: 0.5%-2%; pH adjuster: Appropriate amount, used to adjust the pH value of the final product to 9.5-11.0; Deionized water: Balance; The composite antibacterial system comprises the following components: a) Double-chain quaternary ammonium salt compounds; b) Guanidine polymers; c) Plant-derived antibacterial synergists.

[0007] Furthermore, the surfactant system comprises anionic surfactants and nonionic surfactants in a mass ratio of (2:1) to (4:1).

[0008] Furthermore, in the composite antibacterial system, the double-chain quaternary ammonium salt compound is decyl dimethyl ammonium chloride or decyl dimethyl ammonium chloride; the guanidine polymer is polyhexamethylene biguanide hydrochloride; and the plant-derived antibacterial synergist is selected from one or more of Coptis chinensis extract, tea polyphenols, or paeonol.

[0009] Furthermore, in the composite antibacterial system, the mass ratio of component a) double-chain quaternary ammonium salt compound, component b) guanidine polymer and component c) plant-derived antibacterial synergist is (40%-60%):(20%-35%):(10%-25%).

[0010] Furthermore, the compound bio-enzyme preparation includes protease, lipase, amylase and cellulase.

[0011] Furthermore, the cellulase is a low-damage cellulase.

[0012] Furthermore, the detergent and alkali are selected from one or more of sodium citrate, sodium carbonate, and sodium silicate.

[0013] Furthermore, the chelating agent is disodium ethylenediaminetetraacetate or tetrasodium glutamate diacetate.

[0014] Furthermore, the corrosion inhibitor is benzotriazole or a derivative thereof.

[0015] A method for preparing an antibacterial linen detergent as described in any of the above claims, characterized by comprising the following steps: adding the composite antibacterial system and the composite bio-enzyme preparation to a formulation matrix and mixing them evenly at a temperature below 40°C.

[0016] The technical effects and advantages of this invention are as follows: A multi-level, multi-target composite antibacterial system was constructed, solving the problems of drug resistance and antibacterial spectrum: Double-chain quaternary ammonium salts can rapidly disrupt microbial cell membranes, resulting in a rapid killing effect.

[0017] Guanidine polymers (such as PHMB) can penetrate cell membranes and bind to substances such as nucleic acids in the cytoplasm, causing cellular metabolic disorders, resulting in thorough sterilization and low likelihood of drug resistance. Their positively charged properties allow them to adhere to negatively charged fabric fibers, providing a long-lasting antibacterial effect.

[0018] Plant-derived antibacterial synergists not only possess antibacterial activity themselves but also disrupt biofilms, enhancing the penetration and efficacy of the two synthetic antibacterial agents mentioned above. The combination of these three agents produces a significant synergistic effect (verified experimentally, with a synergistic index CI < 1), exhibiting a broad-spectrum and highly effective killing effect against Escherichia coli, Staphylococcus aureus, Candida albicans, and even certain enveloped viruses, superior to any single component, and significantly reducing the risk of cross-resistance in bacteria.

[0019] A "cleaning-antibacterial" synergistic mechanism has been introduced: In traditional detergents, dirt may encapsulate microorganisms, reducing the chance of antibacterial agents coming into contact with pathogens. In this invention, the compound bio-enzyme preparation (protease, lipase, amylase) can efficiently decompose organic dirt such as proteins, greases, and starches on linens, essentially "removing" the "protective layer" of microorganisms. This allows the compound antibacterial agent to act more directly and fully on the microorganisms, greatly improving the antibacterial reliability in real-world stain environments. Simultaneously, the added low-damage cellulase gently removes lint and residual impurities from the fabric surface, restoring the linens' color and softness without significantly damaging fiber strength.

[0020] It achieves low-temperature, high-efficiency washing while also being environmentally friendly and protecting fabrics. This formula achieves optimal washing and antibacterial effects in warm water (40-60℃), avoiding high-temperature energy consumption and fiber damage. Environmentally friendly detergents such as sodium citrate are used, and the preferred biodegradable GLDA is selected as the bonding agent. The entire formula is free of phosphorus, chlorine bleach, and controversial antibacterial agents (such as triclosan), reducing eutrophication pollution and the generation of toxic byproducts, making it more environmentally friendly and safe. The addition of corrosion inhibitors effectively protects washing equipment.

[0021] Provides lasting health protection: Due to the strong adsorption properties of components such as PHMB on fabric fibers, washed linens can continue to inhibit the regrowth of microorganisms during drying and short-term storage, providing continuous hygiene protection "after washing," making them particularly suitable for occasions with extremely high hygiene requirements. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0023] Unless otherwise specified, the experimental methods used in the following embodiments and comparative examples of the present invention are conventional methods; and the materials and reagents used are commercially available unless otherwise specified.

[0024] Example 1 This embodiment provides an antibacterial linen detergent, the raw material composition of which, by weight percentage, is as follows: Sodium fatty alcohol polyoxyethylene ether sulfate (AES, anionic): 16% Fatty alcohol polyoxyethylene ether (AEO-9, nonionic): 8% Didecyl dimethyl ammonium chloride (DDAC): 3.0% Polyhexamethylene biguanide hydrochloride (PHMB, 20% aqueous solution): 7.5% (equivalent to 1.5% pure product) Tea polyphenols (content 98%): 0.5% Protease (200,000 U / g): 1.5% Lipase (100,000 U / g): 1.0% Amylase (50,000 U / g): 0.5% Low-damage cellulase (EC 3.2.1.4, commercially available low-damage genetically engineered product): 1.0% Sodium citrate: 15% Sodium carbonate: 5% Tetrasodium glutamate diacetate (GLDA, 40% aqueous solution): 5% (equivalent to 2% of pure product) Benzotriazole (BTA): 1.0% Sodium hydroxide (10% aqueous solution): appropriate amount, used to adjust pH. Deionized water: balance to 100% The preparation method is as follows: Add approximately 60% deionized water to a reactor equipped with stirring and temperature control, and heat to 45°C.

[0025] While stirring (60-80 rpm), slowly add AES and AEO-9 in sequence, and continue stirring for 30 minutes until completely dissolved and the system is homogeneous and transparent.

[0026] Switch the reactor jacket to cooling water to reduce the material temperature to below 35°C.

[0027] In another container, DDAC, PHMB solution, and tea polyphenols were premixed evenly with a small amount of 40°C warm water to prepare a composite antibacterial agent premix. This premix was then slowly added to the reaction vessel under low-speed stirring for 15 minutes.

[0028] Keep the temperature below 35°C, add protease, lipase, amylase and cellulase in sequence, and stir slowly for 20 minutes to ensure that the enzyme preparation is evenly dispersed.

[0029] Add sodium citrate, sodium carbonate, GLDA solution and benzotriazole, increase the stirring speed to 100-120 rpm, and continue stirring for 40 minutes until all solids are completely dissolved and the system is homogeneous.

[0030] Adjust the pH of the system to 10.5 ± 0.1 using a 10% sodium hydroxide aqueous solution.

[0031] Stop heating and stirring, add deionized water to 100% of the total weight, and then stir at low speed for 10 minutes to mix evenly.

[0032] After standing and defoaming, a light yellow, semi-transparent liquid product is obtained, which is then discharged and packaged.

[0033] Example 2 This embodiment provides another formulation of an antibacterial linen detergent, the raw material composition of which, by weight percentage, is: Sodium linear alkylbenzene sulfonate (LAS): 12% Sodium secondary alkyl sulfonate (SAS): 10% Alkyl glycoside (APG1214): 5% Dioctyldimethylammonium chloride: 2.0% Polyhexamethylene biguanide hydrochloride (solid powder, content ≥97%): 1.0% Paeonol: 0.3% Compound enzyme preparation (commercially available compound liquid enzyme, containing protease, lipase, and amylase): 6.0% Low-damage cellulase: 0.5% Sodium citrate: 10% Sodium silicate (modulus 2.4): 8% Disodium ethylenediaminetetraacetate (EDTA-2Na): 2.0% Methylbenzotriazole (TTA): 0.8% Potassium hydroxide (10% aqueous solution): appropriate amount Deionized water: balance to 100% The preparation method is the same as in Example 1. Note that potassium hydroxide solution is used when adjusting the pH, and the final pH value is adjusted to 10.0±0.1.

[0034] Example 3 This embodiment aims to demonstrate a feasible formulation for the lower limit of the content of a composite antibacterial system, the raw material composition of which is as follows by weight percentage: AES: 10% AEO-9: 8% Sodium α-olefin sulfonate (AOS): 7% DDAC: 1.2% PHMB (20% aqueous solution): 6.0% (equivalent to 1.2% pure product) Coptis chinensis extract (10:1): 0.6% Protease: 1.0% Lipase: 0.5% Amylase: 0.5% Sodium carbonate: 12% Sodium silicate: 6% GLDA (40% solution): 2.5% (equivalent to 1.0% pure product) BTA: 0.5% Sodium hydroxide solution: appropriate amount Deionized water: balance to 100% The final pH value was adjusted to 9.8 ± 0.1.

[0035] Comparative Example 1: The difference between this comparative example and Example 1 is that only DDAC (4.5%) is used in the composite antibacterial system, and PHMB and tea polyphenols are not used. The other components and dosages are exactly the same as in Example 1.

[0036] Comparative Example 2: The difference between this comparative example and Example 1 is that only PHMB (equivalent to 1.5% pure product) and tea polyphenols (0.5%) are used in the composite antibacterial system, but DDAC is not used. The total amount of antibacterial agent is adjusted to 2.0%, and the total weight is kept constant by adding deionized water.

[0037] Comparative Example 3: The difference between this comparative example and Example 1 is that no compound biological enzyme preparations (protease, lipase, amylase and cellulase are added) are added, and this part of the weight is balanced by deionized water.

[0038] Application effect test The samples obtained from Examples 1-3 and Comparative Examples 1-3 above, as well as a mainstream commercial chlorine-containing bleach detergent (labeled with available chlorine content), were subjected to performance tests according to the following methods: Detergency testing: Referring to the method for protein-stained and sebum-stained cloths in GB / T 13174-2021 "Determination of detergency and recycle performance of detergents for clothing", standard soiled cloths were washed at 50℃ and a concentration of 0.2% (wt). The results are expressed as detergency ratio (R).

[0039] Antibacterial performance test: Immediate sterilization rate: Refer to the quantitative sterilization test method for suspension in section 2.1.8 of the "Disinfection Technical Specifications" (2002 edition). Dilute the sample with hard water to the working concentration (1% w / v), and react it with the bacterial suspension (Escherichia coli 8099, Staphylococcus aureus ATCC 6538) at 50℃ for 15 minutes, and calculate the logarithmic kill value.

[0040] Antibacterial durability (antibacterial inhibition rate): Clean cotton cloth (5cm×5cm) after washing, rinsing and drying the sample of Example 1 and the commercially available product was hung in a constant temperature and humidity chamber (37℃, RH>90%) for 7 days, and its antibacterial inhibition rate against Staphylococcus aureus was determined according to the shaking method of GB / T 20944.3-2008.

[0041] Fabric damage evaluation: Referring to GB / T 3921-2008 "Textiles - Tests for Color Fastness to Soap Washing" and FZ / T60019-1994 "Test Method for Fabric Hairiness", new cotton fabrics of the same specifications were washed 50 times with each sample (1% concentration, 50℃) and commercially available products (under the same conditions). The tear strength retention rate and surface hairiness change (subjective evaluation and gravimetric method) were then measured. The test results are summarized in the table below: Results analysis: Examples 1-3 all exhibited excellent detergency and immediate sterilization performance. Among them, Example 1 (full components) showed the best results.

[0042] The immediate bactericidal rate and the sustained antibacterial rate after 7 days of Comparative Examples 1 and 2 (with or without one antibacterial component) were significantly lower than those of Example 1, demonstrating the synergistic effect of the combination of DDAC, PHMB and plant-derived synergist, especially its significant contribution to sustained antibacterial activity.

[0043] Comparative Example 3 (enzyme-free) showed a significant decrease in detergency, particularly against fabrics stained with sebum, but its immediate sterilization rate remained unaffected. However, in practical applications, the presence of stains can shield microorganisms, reducing the efficiency of disinfectant contact. This test was conducted under laboratory suspension conditions, so the effect was not apparent. However, on actual stained linens, the sterilization effect of Comparative Example 3 was significantly inferior to that of Example 1. This demonstrates the importance of the bio-enzyme's ability to "remove the dirt shield" in ensuring effective sterilization.

[0044] Compared with commercially available chlorine-containing products, the embodiments of the present invention achieve the same or even better stain removal and sterilization effects while significantly reducing damage to fabrics (higher strength retention rate, less fuzz and fading), and endowing the washed linens with long-lasting antibacterial ability, which is a function that chlorine-containing bleach does not have at all.

[0045] The product of this invention can exert its full effect at a medium temperature of 50°C, while commercially available chlorine-containing products are usually recommended to be used with hot water or steam at a temperature of 65°C or higher. This invention has a greater energy-saving advantage.

[0046] In summary, this invention, through the innovative combination and synergy of a composite antibacterial system and a composite bio-enzyme preparation, successfully provides a professional linen washing solution that is efficient, long-lasting, low-temperature resistant, environmentally friendly, and fabric-friendly.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An antibacterial linen detergent, characterized in that, By weight percentage, it includes the following components: Surfactant system: 20%-40%; Compound antibacterial system: 3%-10%; Compound biological enzyme preparations: 2%-8%; Detergent and alkali additives: 15%-30%; Chelating agent: 1%-5%; Corrosion inhibitor: 0.5%-2%; pH adjuster: Appropriate amount, used to adjust the pH value of the final product to 9.5-11.0; Deionized water: Balance; The composite antibacterial system comprises the following components: a) Double-chain quaternary ammonium salt compounds; b) Guanidine polymers; c) Plant-derived antibacterial synergists.

2. The antibacterial linen detergent according to claim 1, characterized in that, The surfactant system comprises anionic surfactants and nonionic surfactants in a mass ratio of (2:1) to (4:1).

3. The antibacterial linen detergent according to claim 1, characterized in that, In the composite antibacterial system, the double-chain quaternary ammonium salt compound is decyl dimethyl ammonium chloride or decyl dimethyl ammonium chloride; the guanidine polymer is polyhexamethylene biguanide hydrochloride; and the plant-derived antibacterial synergist is selected from one or more of Coptis chinensis extract, tea polyphenols, or paeonol.

4. The antibacterial linen detergent according to claim 1 or 3, characterized in that, In the composite antibacterial system, the mass ratio of component a) double-chain quaternary ammonium salt compound, component b) guanidine polymer and component c) plant-derived antibacterial synergist is (40%-60%):(20%-35%):(10%-25%).

5. The antibacterial linen detergent according to claim 1, characterized in that, The compound bioenzyme preparation includes protease, lipase, amylase and cellulase.

6. The antibacterial linen detergent according to claim 5, characterized in that, The cellulase described is a low-damage cellulase.

7. The antibacterial linen detergent according to claim 1, characterized in that, The detergent and alkali are selected from one or more of sodium citrate, sodium carbonate, and sodium silicate.

8. The antibacterial linen detergent according to claim 1, characterized in that, The chelating agent is disodium ethylenediaminetetraacetate or tetrasodium glutamate diacetate.

9. The antibacterial linen detergent according to claim 1, characterized in that, The corrosion inhibitor is benzotriazole or its derivative.

10. A method for preparing an antibacterial linen detergent as described in any one of claims 1-9, characterized in that, Includes the following steps: At a temperature below 40°C, the composite antibacterial system and the composite bio-enzyme preparation are added to the formulation matrix and mixed evenly.

Images