High-efficiency blood stain removing powder and preparation method thereof

Abstract

The present application belongs to the technical field of cleaning supplies, and particularly relates to a high-efficiency blood-stain removing powder and a preparation method thereof. The high-efficiency blood-stain removing powder provided by the present application comprises the following raw materials and mass fractions: 45.0-65.0 parts of sodium percarbonate, 12.0-18.0 parts of an auxiliary agent, 11.0-18.0 parts of an auxiliary cleaning agent, 4.0-7.0 parts of anhydrous sodium metasilicate, 1.0-3.0 parts of a non-ionic surfactant, 1.5-2.5 parts of an enzyme preparation, 0.2-1.0 parts of an antibacterial agent, 1.0-3.0 parts of a thickening agent, and 0.1-0.5 parts of a fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium alpha-alkenyl sulfonate at a mass ratio of 8.0-12.0:3.0-6.0. When the high-efficiency blood-stain removing powder of the present application is used, no complex operation is needed, and blood stains can be easily removed through simple soaking, without laborious scrubbing, so that the effect of 'quick cleaning and complete stain removal' is truly achieved.

Description

Technical Field

[0001] This invention belongs to the field of cleaning products technology, specifically relating to a highly efficient bloodstain remover powder and its preparation method. Background Technology

[0002] Blood stains are a frequent yet difficult-to-treat cleaning problem in daily life: blood stains on clothing from a woman's menstrual period, bloodstains on sheets from a child's nosebleed, bloodstains on everyday clothes, or animal blood from handling food are not only difficult to clean, but also prone to bacterial growth and odor in warm, humid environments, and can gradually yellow and spoil, causing many problems for daily care. Ordinary cleaning methods are often ineffective—laundry detergent cannot break down the protein components in blood stains, and washing with hot water will only cause the protein to coagulate, making the stain even harder to remove; even after soaking for 1-2 hours and repeatedly hand-washing, obvious stains will still remain on the clothes, and the antibacterial effect is poor. More importantly, blood stains are divided into fresh blood stains and old blood stains: while fresh blood stains are soluble in water, the iron in old blood stains has been oxidized to ferric iron and has tightly bound to the protein, forming blood spots that adhere firmly to the fabric. In this case, chemical detergents alone, even with soaking and rubbing techniques, are unlikely to completely remove the marks. These residual bloodstains not only affect the appearance of fabrics but also limit their subsequent use, causing inconvenience in daily life. Therefore, the market urgently needs a cleaning powder product that can quickly and easily remove bloodstains, completely solving the pain points of bloodstain removal.

[0003] Chinese patent application CN118879421A, entitled "A Highly Effective Detergent Composition for Removing Blood Stains and Its Preparation Method," utilizes a chelation-reduction system. It employs high-content iron chelating agents such as trisodium methylglycine diacetate (MGDA) and tetrasodium glutamate diacetate (GLDA) in combination with sodium metabisulfite as a reducing agent to decompose ferric iron. A special surfactant, sodium alcohol ether carboxylate, is added to enhance emulsification. However, this method relies on a liquid system, and its applicability to solid powders has not been verified. Furthermore, the reducing agent may damage fabric color, and the stability of enzymes in a liquid environment remains unresolved.

[0004] Chinese patent application CN119799426A, "A laundry detergent containing nanozymes and its preparation method," uses a nanozyme system and introduces manganese selenide nanozymes to simulate the activities of various enzymes, thereby improving the broad-spectrum stain removal of oil stains, soy sauce stains, and antibacterial properties. However, the nanozyme synthesis process is complex and requires a hydrothermal synthesis method, which is costly. Furthermore, it does not optimize the iron complex structure of proteins in blood stains. The long-term stability data of the enzyme in the powder is insufficient, only mentioning that the activity loss is ≤20% after 6 months.

[0005] Although there are countless detergents on the market today, such as laundry powder, laundry liquid, and soap powder, they generally have problems such as not being very effective at removing blood stains. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a highly efficient blood stain remover powder and its preparation method. When using the highly efficient blood stain remover powder of the present invention, no complicated operations are required; blood stains can be easily removed simply by soaking, eliminating the need for strenuous scrubbing and achieving a truly "quick cleaning and thorough stain removal" effect, fundamentally solving the long-standing problem of blood stain removal that has plagued users.

[0007] The technical solution of this invention is: A highly effective blood stain remover powder comprises the following raw materials and their mass proportions: 45.0-65.0 parts sodium percarbonate, 12.0-18.0 parts auxiliaries, 11.0-18.0 parts auxiliary cleaning agent, 4.0-7.0 parts anhydrous sodium metasilicate, 1.0-3.0 parts nonionic surfactant, 1.5-2.5 parts enzyme preparation, 0.2-1.0 parts antibacterial agent, 1.0-3.0 parts thickener, and 0.1-0.5 parts fragrance; wherein the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 8.0-12.0:3.0-6.0.

[0008] Furthermore, the high-efficiency blood stain remover powder comprises the following raw materials and their mass fractions: 45.0-65.0 parts sodium percarbonate, 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance.

[0009] Furthermore, the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.5.

[0010] Furthermore, the additive is one of sodium tripolyphosphate and sodium silicate.

[0011] Furthermore, the nonionic surfactant is one of polyoxyethylene nonionic surfactants or alkyl glycoside nonionic surfactants.

[0012] Furthermore, the enzyme preparation consists of alkaline protease, lipase, and cellulase.

[0013] Furthermore, the enzyme preparation is composed of alkaline protease, lipase and cellulase in a mass ratio of (1.0-1.5):(0.3-0.7):(0.2-0.5).

[0014] Furthermore, the enzyme preparation is composed of alkaline protease, lipase and cellulase in a mass ratio of 1.2:0.5:0.3.

[0015] Furthermore, the antibacterial agent is tetramethylammonium chloride.

[0016] Furthermore, the thickener is sodium carboxymethyl cellulose.

[0017] In this invention, sodium percarbonate, as the main component, possesses strong oxidizing properties and can effectively decompose and remove stubborn stains such as blood stains. Sodium carbonate and sodium α-alkenyl sulfonate, as auxiliary cleaning agents, enhance the stain removal effect, especially for protein-based stains such as blood stains. The enzyme preparation can decompose the protein, fat, and other components in blood stains, further improving cleaning efficiency. The addition of auxiliaries and nonionic surfactants improves the product's dispersibility and stability while reducing irritation and enhancing safety. The addition of sodium carboxymethyl cellulose, a thickener, improves the texture of the cleaning solution after the product dissolves in water. Through its colloidal protection and anti-redeposition effect, it effectively prevents stains from re-adhering to fabrics, thus ensuring a residue-free cleaning effect. Tetramethylammonium chloride, as an antibacterial agent, inhibits bacterial growth and has a good bactericidal effect.

[0018] Another object of the present invention is to provide a method for preparing the aforementioned high-efficiency blood stain remover powder, comprising the following steps: S1. Dissolve the enzyme preparation in water, adjust the pH value to 8.0-9.0, and keep it at 30-35℃ for 30 minutes to obtain the pretreated enzyme preparation; S2. Dry sodium carbonate at 75-85℃ for 1.5-2.5 hours; S3. First, add sodium percarbonate and the dried sodium carbonate obtained in step S2 to the container, and stir at 250-350 rpm for 3-7 minutes; then add the additives and anhydrous sodium metasilicate, and continue stirring at 250-350 rpm for 8-15 minutes; after that, add sodium α-alkenyl sulfonate, and continue stirring at 250-350 rpm for 8-15 minutes to obtain the powder. S4. Spray the nonionic surfactant evenly onto the surface of the powder obtained in step S3, increase the stirring speed to 450-550 rpm, and stir for 12-16 minutes. S5. Add the pretreated enzyme preparation, antibacterial agent and thickener from step S1 to the powder of nonionic surfactant sprayed in step S4, reduce the stirring speed to 250-350 rpm and stir for 3-7 minutes. S6. Add flavoring and mix well; S7. Transfer the mixture obtained in step S6 to a fluidized bed dryer and dry it at a temperature ≤50℃ until the moisture content is ≤8% to obtain a high-efficiency blood stain remover powder.

[0019] Compared with the prior art, the present invention has the following advantages: (1) The preparation method of the present invention is simple, low in cost, and easy to implement in industrialization; (2) When using the high-efficiency blood stain remover powder of the present invention, no complicated operation is required. Blood stains can be easily removed simply by soaking, without the need for strenuous scrubbing.

[0020] (3) The test results of the blood stain removal effect show that the high-efficiency blood stain removal powder of the present invention can completely remove old blood stains and leave no residue after washing.

[0021] (4) The product of this invention retains its excellent bloodstain removal effect even after long-term storage, and also has excellent usability. Use security. Attached Figure Description

[0022] Figure 1 These are comparison images of pure cotton white cloth before and after washing for Example 1 and Control Sample 1; Figure 2 These are comparison images of pure cotton white cloth before and after washing for Example 2 and Control Sample 2; Figure 3 These are comparison images of pure cotton white cloth before and after washing for Example 3 and Control Sample 3. Detailed Implementation

[0023] The present invention will be further described below through specific embodiments, but this is not a limitation of the present invention. Those skilled in the art can make various modifications or improvements based on the basic idea of ​​the present invention, but as long as they do not depart from the basic idea of ​​the present invention, they are all within the scope of the present invention.

[0024] Unless otherwise specified, all raw materials used in this invention are commercially available.

[0025] Table 1 shows the supplier information for some of the raw materials used in the following examples and comparative examples.

[0026] Table 1: Information on suppliers of some raw materials

[0027] Example 1: A highly effective blood stain remover powder The highly efficient blood stain remover powder comprises the following raw materials and their mass proportions: 45.0 parts sodium percarbonate, 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.5; the auxiliary agent is sodium tripolyphosphate; the nonionic surfactant is a polyoxyethylene nonionic surfactant; the enzyme preparation is composed of alkaline protease, lipase, and cellulase in a mass ratio of 1.0:0.7:0.5; the antibacterial agent is tetramethylammonium chloride; and the thickener is sodium carboxymethyl cellulose.

[0028] The preparation method of the aforementioned high-efficiency blood stain remover powder includes the following steps: S1. Dissolve the enzyme preparation in water, adjust the pH value to 8.5, and keep it at 32℃ for 30 minutes to obtain the pretreated enzyme preparation; S2. Place the sodium carbonate in an 80℃ oven and dry for 2 hours to ensure complete removal of moisture; S3. First, add sodium percarbonate and the dried sodium carbonate obtained in step S2 to the mixer and stir at 300 rpm for 5 minutes; then add the additives and anhydrous sodium metasilicate and continue stirring at 300 rpm for 10 minutes; after that, add sodium α-alkenyl sulfonate and continue stirring at 300 rpm for 10 minutes to obtain the powder. S4. Place the nonionic surfactant into a clean stainless steel inner liner of the pressure vessel, then spray it evenly onto the powder surface in the mixer, increase the stirring speed to 500 rpm, and stir for 15 minutes. S5. Add the pretreated enzyme preparation, antibacterial agent and thickener from step S1 to the powder of nonionic surfactant sprayed in step S4, reduce the stirring speed to 300 rpm and stir for 5 minutes. S6. Add flavoring and mix well; S7. Transfer the mixture obtained in step S6 to a fluidized bed dryer and dry it at a temperature ≤50℃ until the moisture content is ≤8% to obtain a high-efficiency blood stain remover powder.

[0029] Example 2: A highly effective bloodstain remover powder The highly efficient blood stain remover powder comprises the following raw materials and their mass proportions: 55.0 parts sodium percarbonate, 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.5; the auxiliary agent is sodium silicate; the nonionic surfactant is a polyoxyethylene nonionic surfactant; the enzyme preparation is composed of alkaline protease, lipase, and cellulase in a mass ratio of 1.2:0.5:0.3; the antibacterial agent is tetramethylammonium chloride; and the thickener is sodium carboxymethyl cellulose.

[0030] The preparation method of the high-efficiency blood stain remover powder is similar to that in Example 1.

[0031] Example 3: A Highly Effective Bloodstain Remover Powder The highly efficient blood stain remover powder comprises the following raw materials and their mass proportions: 65.0 parts sodium percarbonate, 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.5; the auxiliary agent is sodium tripolyphosphate; the nonionic surfactant is a polyoxyethylene nonionic surfactant; the enzyme preparation is composed of alkaline protease, lipase, and cellulase in a mass ratio of 1.5:0.3:0.2; the antibacterial agent is tetramethylammonium chloride; and the thickener is sodium carboxymethyl cellulose.

[0032] The preparation method of the high-efficiency blood stain remover powder is similar to that in Example 1.

[0033] Comparative Example 1: A blood stain remover powder The blood stain remover powder comprises the following raw materials and their mass proportions: 45.0 parts sodium percarbonate, 10.0 parts tetraacetylethylenediamine (TAED), 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.5; the auxiliary agent is sodium silicate; the nonionic surfactant is a polyoxyethylene nonionic surfactant; the enzyme preparation is composed of alkaline protease, lipase, and cellulase in a mass ratio of 1.2:0.5:0.3; the antibacterial agent is tetramethylammonium chloride; and the thickener is sodium carboxymethyl cellulose.

[0034] The preparation method of the high-efficiency blood stain remover powder is similar to that in Example 1.

[0035] The difference from Example 2 is that a bleaching activation system consisting of “45.0 parts sodium percarbonate + 10.0 parts tetraacetylethylenediamine (TAED)” was used to replace 55.0 parts sodium percarbonate in Example 2.

[0036] Comparative Example 2: A blood stain remover powder The blood stain remover powder comprises the following raw materials and their mass proportions: 55.0 parts sodium percarbonate, 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.5; the auxiliary agent is sodium silicate; the nonionic surfactant is a polyoxyethylene nonionic surfactant; the enzyme preparation is composed of alkaline protease and lipase in a mass ratio of 1.2:0.5; the antibacterial agent is tetramethylammonium chloride; and the thickener is sodium carboxymethyl cellulose.

[0037] The preparation method of the blood stain remover powder is similar to that in Example 1.

[0038] The difference from Example 2 is that the enzyme preparation is composed of alkaline protease and lipase in a mass ratio of 1.2:0.5.

[0039] Comparative Example 3: A blood stain remover powder The blood stain remover powder comprises the following raw materials and their mass proportions: 55.0 parts sodium percarbonate, 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 14.0:1.5; the auxiliary agent is sodium silicate; the nonionic surfactant is a polyoxyethylene nonionic surfactant; the enzyme preparation is composed of alkaline protease, lipase, and cellulase in a mass ratio of 1.2:0.5:0.3; the antibacterial agent is tetramethylammonium chloride; and the thickener is sodium carboxymethyl cellulose.

[0040] The preparation method of the blood stain remover powder is similar to that in Example 1.

[0041] The difference from Example 2 is that the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 14.0:1.5.

[0042] Comparative Example 4: A blood stain remover powder The blood stain remover powder comprises the following raw materials and their mass proportions: 55.0 parts sodium percarbonate, 16.0 parts auxiliary agent, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.5; the auxiliary agent is sodium silicate; the nonionic surfactant is a polyoxyethylene nonionic surfactant; the enzyme preparation is composed of alkaline protease, lipase, and amylase in a mass ratio of 1.2:0.5:0.3; the antibacterial agent is tetramethylammonium chloride; and the thickener is sodium carboxymethyl cellulose.

[0043] The preparation method of the blood stain remover powder is similar to that in Example 1.

[0044] Experiment 1: Bloodstain Removal Effect Test (1) Prepare a 10cm×10cm pure cotton white cloth, apply 0.5g of fresh chicken blood evenly on the pure cotton white cloth, and let it dry at room temperature for 72 hours before use; take a picture before washing. (2) Take 10g of the high-efficiency blood stain remover powder prepared in the example group and the control sample prepared in the comparative group, add pure water to 1000g to obtain a room temperature aqueous solution with a mass ratio of 1:100, add the blood-stained cloth, and then soak it at room temperature for 15 minutes. Take it out, rinse it with clean water, and then dry it. Use a WSD-3U fluorescence whiteness meter to test the value and record the value for comparison.

[0045] (3) The experimental results are shown in Table 2. Figure 1 , Figure 2 , Figure 3 As shown.

[0046] Table 2 Comparison of whiteness of pure cotton white cloth before and after washing in each group

[0047] Example 1: Comparison of pure cotton white cloth before and after washing (see image for control sample 1). Figure 1 As shown, where Figure 1 The image above shows the product before cleaning. Figure 1 Below are comparison images of the cleaned pure cotton white cloth before and after washing, as shown in Example 2 and Control Sample 2. Figure 2 As shown, where Figure 2 The image above shows the product before cleaning. Figure 2 Below are comparison images of the cleaned pure cotton white cloth before and after cleaning in Example 3 and Control Sample 3. Figure 3 As shown, where Figure 3 The image above shows the product before cleaning. Figure 3 Below is the image after cleaning. The "before cleaning" in the above example, similar to "Comparison of pure cotton white cloth before and after cleaning in Example 1 and Control Sample 1," refers to the pure cotton white cloth after chicken blood has been applied.

[0048] In Table 2, "Whiteness Values ​​of Pure Cotton White Cloth Before Washing" refers to pure cotton white cloth that has not been coated with chicken blood. (From Table 2...) Figure 1 , Figure 2 , Figure 3 As can be seen, the difference in whiteness of the pure cotton white cloth before and after washing in Examples 1-3 of this invention is 0, indicating that the high-efficiency blood stain remover powder prepared by this invention can completely remove blood stains without leaving any residue after washing. However, the whiteness differences of the pure cotton white cloth before and after washing in Control Samples 1, 2, and 3 prepared using Comparative Examples 1, 2, and 3 are relatively large, indicating that some blood stains remain in the control samples. Therefore, it is evident that the blood stain removal effect of the control samples prepared using the comparative examples is significantly inferior to that of this invention.

[0049] Experimental Example 2: Testing of Fabric Color and Fiber Integrity 1. Experimental objective: To verify the effects of the high-efficiency blood stain remover powder of this invention on the color of common fabrics and the damage to the fiber structure under the recommended concentration and accelerated aging conditions, and to prove its safety in use.

[0050] 2. Experimental materials: Test samples: High-efficiency blood stain remover powder prepared in Example 2, Comparative Example 2, and Comparative Example 4.

[0051] 3. Experimental fabric: Color fastness test cloth: Various colored fabrics (including cotton, polyester, wool, etc.) as specified in the national standard GB / T3921-2008, or common colored cotton cloths (red, blue, black) purchased from the market.

[0052] Fiber damage test cloth: standard specification pure cotton white cloth (used to test strength loss) and wool fabric.

[0053] 4. Instruments and equipment: Fully automatic color difference meter (such as X-RiteCi7600), digital fabric strength tester, constant temperature water bath, electronic balance.

[0054] 5. Experimental methods: (1) Color effect test (color fastness test) Cut the colored fabric into 10cm x 10cm patterns.

[0055] Prepare a 1.0% (w / v) sample solution (i.e., 10g of product dissolved in 1L of water).

[0056] The fabric sample was completely immersed in the above solution and soaked in a 40°C constant temperature water bath for 30 minutes to simulate a strong wash.

[0057] Remove the fabric sample, rinse it with deionized water, and air dry it at room temperature.

[0058] Use a colorimeter to measure the color change of the fabric sample before and after washing, and record the ΔE* value (total color difference value). The larger the ΔE* value, the more severe the color change (damage).

[0059] To enhance persuasiveness, multiple cyclical tests were conducted: the same fabric sample was soaked, washed, and dried five times to simulate the cumulative effects of repeated use.

[0060] (2) Fiber damage test Cut pure cotton white cloth and wool fabric into standard-sized strips (e.g., 5cm x 20cm).

[0061] Using the same method as above, the fabric sample was immersed in a 1.0% sample solution at 40°C for 30 minutes.

[0062] Repeat this cycle 5 times.

[0063] The tensile strength (unit: N) of the treated fabric sample and the untreated new fabric sample of the same type was tested on a fabric strength tester.

[0064] Calculate the fracture strength loss rate: Strength loss rate (%) = [(Original strength - Post-treatment strength) / Original strength] × 100%.

[0065] The experimental results are shown in Tables 3 and 4. The reference standard for evaluating fabric color difference is as follows: ΔE*<1.0: the difference is almost imperceptible to the human eye; 1.0≤ΔE*<2.0: slight change, within acceptable range; ΔE*≥2.0: significant change, indicating damage to color.

[0066] Table 3. Color difference changes of fabric after multiple washes (ΔE* value)

[0067] As can be seen from Table 3, even after multiple uses, the product of the present invention has minimal impact on the color of various colored fabrics (ΔE* values ​​are all within acceptable range), while the product of Comparative Example 4 causes significant color damage.

[0068] Table 4. Loss rate of fabric breaking strength after multiple washings

[0069] As can be seen from Table 4, after 5 washes, the product of the present invention causes negligible damage to cotton and wool fibers, far less than that of the product in Comparative Example 2, which proves that the product of the present invention has excellent gentleness and fiber protection performance.

[0070] Test Example 3: Product Storage Stability and Long-Term Use Effect Test 1. Experimental objective: To verify the enzyme activity retention rate and the stability of the core blood stain removal function of the high-efficiency blood stain removal powder of this invention after storage by simulating long-term storage conditions through accelerated aging experiments.

[0071] 2. Experimental methods: (1) Accelerated storage stability test: Principle: Based on the Arrhenius equation of chemical reactions, the aging of products is accelerated by increasing the storage temperature, thereby predicting the long-term stability of products at room temperature in a shorter time.

[0072] Test sample: The high-efficiency blood stain remover powder prepared in Example 2 was sealed in the final packaging (such as an aluminum-plastic composite film bag) to be used for the product.

[0073] Experimental conditions: Accelerated test group: The sample was placed in a constant temperature and humidity chamber at 40°C ± 2°C and relative humidity of 75% ± 5%.

[0074] Testing cycle: Samples were taken and tested at the end of the 0th, 1st, 2nd, 3rd and 6th months of the accelerated test.

[0075] (2) Detection indicators and methods: Enzyme activity assay: Methods: The residual enzyme activity in the samples was determined in accordance with relevant national standards such as GB / T 23535-2009 Lipase Preparations.

[0076] Calculation: Enzyme activity retention rate (%) = (Enzyme activity after storage / Initial enzyme activity) × 100%.

[0077] Core function verification (bloodstain removal effect): Method: At each test time point, the sample was taken out and the blood stain removal effect was tested according to the exact same method described in "Experimental Example 1". The whiteness value of the pure cotton white cloth after washing was recorded.

[0078] Comparison: Compare the stain removal effect with the initial effect at 0 months.

[0079] 3. The experimental results are shown in Table 5.

[0080] Table 5. Changes in enzyme activity retention and stain removal effect of the sample from Example 2 under accelerated storage conditions.

[0081] Note: Industry practice often equates 6 months of accelerated storage at 40°C to 18-24 months of storage at room temperature (25°C).

[0082] The experimental data in Table 5 show that even under harsh accelerated aging conditions (40°C, RH 75%), the enzyme activity retention rate of the product of this invention is still as high as 80% after 6 months of storage, and its core blood stain removal function does not show significant attenuation (the change in whiteness difference is minimal and imperceptible to the naked eye). This demonstrates the excellent stability of the product of this invention.

[0083] Meeting shelf life requirements: Based on the results of accelerated testing, it can be reasonably inferred that the product of this invention can maintain its excellent blood stain removal effect even after being stored in a dry environment at room temperature for at least 18 months.

Claims

1. A highly effective bloodstain remover powder, characterized in that, The product comprises the following raw materials and their mass fractions: 45.0-65.0 parts sodium percarbonate, 12.0-18.0 parts auxiliaries, 11.0-18.0 parts auxiliary cleaning agent, 4.0-7.0 parts anhydrous sodium metasilicate, 1.0-3.0 parts nonionic surfactant, 1.5-2.5 parts enzyme preparation, 0.2-1.0 parts antibacterial agent, 1.0-3.0 parts thickener, and 0.1-0.5 parts fragrance; the auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 8.0-12.0:3.0-6.

0.

2. The high-efficiency bloodstain remover powder according to claim 1, characterized in that, The product contains the following raw materials and their weight proportions: 45.0-65.0 parts sodium percarbonate, 16.0 parts auxiliaries, 15.5 parts auxiliary cleaning agent, 6.5 parts anhydrous sodium metasilicate, 2.0 parts nonionic surfactant, 1.8 parts enzyme preparation, 0.8 parts antibacterial agent, 2.2 parts thickener, and 0.2 parts fragrance.

3. The high-efficiency bloodstain remover powder according to claim 1 or 2, characterized in that, The auxiliary cleaning agent is composed of sodium carbonate and sodium α-olefin sulfonate in a mass ratio of 10.0:5.

5.

4. The high-efficiency bloodstain remover powder according to claim 1 or 2, characterized in that, The additive is one of sodium tripolyphosphate and sodium silicate.

5. The high-efficiency bloodstain remover powder according to claim 1 or 2, characterized in that, The nonionic surfactant is one of polyoxyethylene nonionic surfactants or alkyl glycoside nonionic surfactants.

6. The high-efficiency bloodstain remover powder according to claim 1 or 2, characterized in that, The enzyme preparation consists of alkaline protease, lipase, and cellulase.

7. The high-efficiency bloodstain remover powder according to claim 1 or 2, characterized in that, The antibacterial agent is tetramethylammonium chloride.

8. The high-efficiency bloodstain remover powder according to claim 1 or 2, characterized in that, The thickener is sodium carboxymethyl cellulose.

9. The method for preparing the high-efficiency blood stain remover powder according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Dissolve the enzyme preparation in water, adjust the pH value to 8.0-9.0, and keep it at 30-35℃ for 30 minutes to obtain the pretreated enzyme preparation; S2. Dry sodium carbonate at 75-85℃ for 1.5-2.5 hours; S3. First, add sodium percarbonate and the dried sodium carbonate obtained in step S2 to the container, and stir at 250-350 rpm for 3-7 minutes; then add the additives and anhydrous sodium metasilicate, and continue stirring at 250-350 rpm for 8-15 minutes; after that, add sodium α-alkenyl sulfonate, and continue stirring at 250-350 rpm for 8-15 minutes to obtain the powder. S4. Spray the nonionic surfactant evenly onto the surface of the powder obtained in step S3, increase the stirring speed to 450-550 rpm, and stir for 12-16 minutes. S5. Add the pretreated enzyme preparation, antibacterial agent and thickener from step S1 to the powder of nonionic surfactant sprayed in step S4, reduce the stirring speed to 250-350 rpm and stir for 3-7 minutes. S6. Add flavoring and mix well; S7. Transfer the mixture obtained in step S6 to a fluidized bed dryer and dry it at a temperature ≤50℃ until the moisture content is ≤8% to obtain a high-efficiency blood stain remover powder.

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