Production method of medical absorbent gauze piece integrating degreasing and bleaching

Abstract

The invention discloses a production method of a medical absorbent gauze piece integrating degreasing and bleaching. In the invention, in the aspect of degreasing efficiency, the environment-friendly degreasing fluid can quickly and effectively decompose and remove fat and grease on the gauze through a unique formula, so that the treatment time is greatly shortened, and the production efficiency is improved, which is particularly important for batch production. The degreasing agent adopts components with good biodegradability and low toxicity, so that pollution to soil and water is reduced, green production of enterprises is facilitated, and the social image is improved. Due to the efficient performance of the environment-friendly degreasing fluid, the consumption of raw materials is reduced, the production cost is reduced, the gauze can be prevented from being damaged in the degreasing process, the original physical properties such as softness, water absorption and air permeability of the gauze can be kept, and therefore medical gauze pieces with higher quality can be produced. Meanwhile, the environment-friendly degreasing fluid does not contain harmful substances, has no irritation to human skin, is suitable for cleaning treatment of medical supplies, and guarantees the health and safety of medical staff and patients.

Description

Technical Field

[0001] The invention belongs to the technical field of medical absorbent gauze production, in particular to a production method of a medical absorbent gauze block integrating degreasing and bleaching. Background Art

[0002] Medical absorbent gauze is a commonly used medical dressing with good absorbency, breathability and safety. It is widely used in bandaging and caring for various wounds. Medical absorbent gauze is mainly made of pure cotton gauze. It is degreased to remove impurities and grease in the cotton fiber, making it softer, more absorbent and breathable. In the medical field, medical absorbent gauze is a widely used medical consumable. It is used in wound care, surgical operations and other occasions, and requires high cleanliness, absorbency and breathability. The key steps in the production of medical absorbent gauze include degreasing and bleaching. These two processes are essential to ensuring the medical standards and performance of the gauze.

[0003] Traditional methods for producing medical absorbent gauze blocks usually include separate degreasing and bleaching steps. Although these methods can meet the basic requirements of medical gauze to a certain extent, they have the following shortcomings:

[0004] Inefficiency: In traditional methods, degreasing and bleaching are usually two separate steps, which makes the entire production process long and inefficient, and is not conducive to large-scale production.

[0005] Environmental pollution: Traditional degreasers and bleaches may contain chemicals that are harmful to the environment, such as strong acids, strong alkalis or chlorine preparations, which are difficult to handle after use and cause pollution to soil and water resources. Summary of the invention

[0006] The object of the present invention is to provide a method for producing a medical absorbent gauze block integrating degreasing and bleaching in order to solve the above-mentioned problems.

[0007] The technical solution adopted by the present invention is as follows: a production method of a medical absorbent gauze block integrating degreasing and bleaching, the method comprising the following steps:

[0008] S1: Select high-quality pure cotton gauze as the raw material for producing medical absorbent gauze blocks; ensure that the gauze is free of damage and impurities and meets medical standards;

[0009] S2: Cut the pure cotton gauze according to the required size, ensuring that the cutting edges are neat and burr-free;

[0010] S3: placing the cut gauze into a pretreatment solution for soaking to remove some impurities and grease on the surface of the gauze;

[0011] S4: Before degreasing, the gauze is first placed in an aqueous solution containing a small amount of environmentally friendly surfactant, and then pre-treated using an ultrasonic device; the cavitation effect of the ultrasonic wave helps to loosen and remove the grease in the gauze; the pre-treated gauze is placed in the prepared environmentally friendly degreasing solution and degreased at a temperature of 80-90°C; the degreasing time is about 1-2 hours to remove the grease in the gauze;

[0012] S5: Turn on the ultrasonic equipment at the same time; the vibration and cavitation of the ultrasonic wave accelerate the detachment of grease and improve the degreasing efficiency. During the ultrasonic-assisted degreasing process, the temperature is controlled between 60-70°C;

[0013] S6: Take out the degreased gauze and rinse it with plenty of clean water until the gauze becomes neutral without alkaline residue;

[0014] S7: putting the rinsed gauze into a bleaching solution and bleaching it at an appropriate temperature; the bleaching time is about 1-2 hours to remove the pigment in the gauze;

[0015] S8: Take out the bleached gauze and rinse it again with plenty of clean water until the gauze becomes neutral and no bleach residue remains;

[0016] S9: Put the rinsed gauze into the softening solution and soak it at room temperature for a period of time to improve the softness of the gauze. Take out the softened gauze and rinse it again with a large amount of clean water until the gauze is neutral and no softener remains.

[0017] S10: sterilizing the rinsed gauze again, which may be sterilized by high temperature and high pressure steam sterilization or ultraviolet sterilization to ensure the sanitation and safety of the medical absorbent gauze piece;

[0018] S11: Dry the sterilized medical absorbent gauze blocks and then package them; the packaging process must be carried out in a sterile environment to ensure the hygiene and safety of the gauze blocks during transportation and storage, and then the entire production process of the integrated degreasing and bleaching medical absorbent gauze blocks can be completed.

[0019] In a preferred embodiment, in step S2, during the cutting process, it is ensured that the blade gap of the cutting tool is less than 0.5 mm, and the cutting speed should be controlled at 10-15 meters per minute.

[0020] In a preferred embodiment, in step S3, the concentration of the sodium hydroxide solution is precisely 5%, and the pH value of the solution is adjusted to 11±0.5 by adding a small amount of phosphoric acid or citric acid; during the immersion process, the temperature of the solution should be maintained at 23±3°C, and the immersion time is 45±5 minutes.

[0021] In a preferred embodiment, in step S4, the environmentally friendly degreasing liquid comprises:

[0022] Lipase 1-2 parts by weight;

[0023] 3-5 parts by weight of chelating agent;

[0024] 5-10 parts by weight of nonionic surfactant;

[0025] 10-15 parts by weight of environmentally friendly solvent;

[0026] Deionized water 67-80 parts by weight;

[0027] 1-3 parts by weight of stabilizer;

[0028] Preservatives 0.1-0.5 parts by weight.

[0029] In a preferred embodiment, in step S4, the method for preparing the environmentally friendly degreasing liquid includes:

[0030] ①. In a clean container, first add accurately weighed lipase, chelating agent, stabilizer and preservative; use a stirrer to stir at a low speed to ensure that the solid ingredients are fully mixed;

[0031] ② Dissolving the nonionic surfactant: Add the nonionic surfactant to the above mixture; continue stirring until the nonionic surfactant is completely dissolved in the solid mixture;

[0032] ③. Add environmentally friendly solvent: slowly add environmentally friendly solvent to the mixture while continuing to stir; this ensures that the solvent is fully mixed with the solid ingredients and helps dissolve other ingredients;

[0033] ④. Add deionized water: Add deionized water gradually while stirring continuously. The speed of adding water should not be too fast to avoid uneven concentration in some parts of the mixture.

[0034] ⑤. Stir thoroughly: After all ingredients are added, increase the stirring speed to ensure that the entire mixture is fully stirred and evenly mixed; the stirring time takes 15-30 minutes, until all ingredients are completely dissolved to form a uniform degreasing agent.

[0035] In a preferred embodiment, in step S5, the power density of the ultrasonic device is controlled at 0.5-1 watt / cm2, and the treatment time is set to 40±5 minutes; the concentration of the environmentally friendly surfactant in the aqueous solution is 0.8%, and the water temperature is maintained at 65±5°C by the temperature control system.

[0036] In a preferred embodiment, in step S6, the flow rate of the rinsing water is maintained at 2-4 liters / minute, and the rinsing time is at least 35 minutes; the pH value of the rinsing water is between 6.5-7.5, and is monitored and adjusted in real time by a pH meter.

[0037] In a preferred embodiment, in step S7, the concentration of the hydrogen peroxide solution is 4%, and the pH value of the solution is adjusted to 8.5±0.5 by adding an appropriate amount of sodium carbonate or sulfuric acid; during the bleaching process, the temperature of the solution is maintained at 45±3°C, and the bleaching time is 90±10 minutes.

[0038] In a preferred embodiment, in step S9, the concentration of the citric acid solution is 1.5%, the pH value of the solution is adjusted to 4.5±0.5, and the soaking time at room temperature is 20±3 minutes.

[0039] In a preferred embodiment, in step S10, during high temperature and high pressure steam sterilization, the preheating time is set to 10 minutes, and after reaching the set temperature and pressure, the sterilization time is maintained for 18±2 minutes; during ultraviolet sterilization, the intensity of ultraviolet rays is not less than 1000 μW / cm 2 The irradiation distance is precisely 1 meter, and the irradiation time is adjusted to 35±5 minutes; the sterilized gauze is tested for sterility to ensure that no microorganisms survive.

[0040] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0041] 1. In the present invention, in terms of degreasing efficiency, the environmentally friendly degreasing liquid can quickly and effectively decompose and remove fat and grease on the gauze through its unique formula, greatly shortening the processing time and improving production efficiency, which is particularly important for batch production. The degreasing agent adopts ingredients with good biodegradability and low toxicity, reduces the pollution to soil and water bodies, complies with environmental protection laws and regulations, helps enterprises achieve green production and enhances their social image. The high efficiency of the environmentally friendly degreasing liquid reduces the consumption of raw materials and reduces production costs. At the same time, its stability and long shelf life also reduce the waste caused by product deterioration, further improving economic benefits. The degreasing agent can ensure that the gauze is not damaged during the degreasing process, maintain its original physical properties, such as softness, water absorption and air permeability, so as to produce higher quality medical gauze blocks. At the same time, the environmentally friendly degreasing liquid does not contain harmful substances, is non-irritating to human skin, is suitable for the cleaning of medical supplies, and ensures the health and safety of medical staff and patients.

[0042] 2. In the present invention, the size consistency and surface smoothness of the gauze block are ensured through precise cutting and pretreatment steps, thereby improving the overall quality of the product. The precise parameter setting of the cutting tool and the optimized ratio of the pretreatment liquid effectively reduce the edge burrs and size errors of the gauze block, making the final product more suitable for the fine requirements in medical operations. In addition, precise process parameter control is adopted in key steps such as bleaching, softening and sterilization, which significantly improves the sterility and safety of the product. Hydrogen peroxide bleaching and citric acid softening treatment not only ensure the cleanliness and softness of the gauze block, but also avoid the harmful residues that may be caused by traditional chemicals. Especially in the sterilization step, the combination of high-temperature and high-pressure steam sterilization and ultraviolet sterilization ensures the high-standard sterile state of the medical absorbent gauze block, effectively reducing the risk of infection in patients during use. These measures work together to make the produced medical absorbent gauze block have higher reliability and applicability in medical practice. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] Embodiment 1:

[0045] A method for producing a medical absorbent gauze block integrating degreasing and bleaching, the method comprising the following steps:

[0046] S1: Choose high-quality pure cotton gauze as the raw material for producing medical absorbent gauze. Make sure the gauze is free of damage and impurities and meets medical standards;

[0047] S2: Cut the pure cotton gauze according to the required size, ensuring that the cutting edges are neat and burr-free;

[0048] S3: placing the cut gauze into a pretreatment solution (such as a sodium hydroxide solution) for soaking to remove some impurities and grease on the surface of the gauze;

[0049] S4: Before degreasing, put the gauze into an aqueous solution containing a small amount of environmentally friendly surfactant, and then use ultrasonic equipment for pretreatment. The cavitation effect of ultrasonic waves helps to loosen and remove grease from the gauze; put the pretreated gauze into the prepared environmentally friendly degreasing solution and degrease at a temperature of 80-90℃. The degreasing time is about 1-2 hours to remove the grease from the gauze;

[0050] In step S4, the environmentally friendly degreasing liquid includes:

[0051] 1 part by weight of lipase (biocatalyst);

[0052] 3 parts by weight of a chelating agent (such as citric acid);

[0053] 5 parts by weight of nonionic surfactant (such as polyoxyethylene ether);

[0054] 1 part by weight of an environmentally friendly solvent (such as isopropyl alcohol);

[0055] Deionized water 67 parts by weight;

[0056] 1 part by weight of a stabilizer (such as sodium carboxymethyl cellulose);

[0057] Preservative (such as sodium benzoate) 0.1 parts by weight.

[0058] S5: Turn on the ultrasonic equipment at the same time. The vibration and cavitation of the ultrasonic wave can accelerate the detachment of grease and improve the degreasing efficiency. During the ultrasonic-assisted degreasing process, the temperature is controlled between 60-70°C;

[0059] S6: Take out the degreased gauze and rinse it with plenty of clean water until the gauze becomes neutral without alkaline residue;

[0060] S7: Put the rinsed gauze into a bleaching solution (such as hydrogen peroxide solution) at an appropriate temperature (40-50°C) for bleaching. The bleaching time is about 1-2 hours to remove the pigment in the gauze;

[0061] S8: Take out the bleached gauze and rinse it again with plenty of clean water until the gauze becomes neutral and no bleach residue remains;

[0062] S9: Put the rinsed gauze into a softening solution (such as citric acid solution) and soak it at room temperature for a period of time to improve the softness of the gauze. Take out the softened gauze and rinse it again with a large amount of clean water until the gauze is neutral and no softener remains.

[0063] S10: sterilizing the rinsed gauze again, using high temperature and high pressure steam sterilization, ultraviolet sterilization and other methods to ensure the sanitation and safety of the medical absorbent gauze piece;

[0064] S11: Dry the sterilized medical absorbent gauze pieces and then pack them. The packaging process must be carried out in a sterile environment to ensure the hygiene and safety of the gauze pieces during transportation and storage, and then the entire production process of the integrated degreasing and bleaching medical absorbent gauze pieces can be completed.

[0065] In step S2, during the cutting process, ensure that the blade gap of the cutting tool is less than 0.5 mm to keep the cutting edge smooth. The cutting speed should be controlled at 10-15 meters per minute to avoid tearing the gauze due to excessive speed. The size error of the gauze block after cutting should be controlled within ± 2 mm to ensure the consistency of size.

[0066] In step S3, the concentration of the sodium hydroxide solution is precisely 5%, and the pH value of the solution is adjusted to 11±0.5 by adding a small amount of phosphoric acid or citric acid. During the soaking process, the temperature of the solution should be maintained at 23±3°C, and the soaking time is 45±5 minutes.

[0067] In step S4, the method for preparing the environmentally friendly degreasing liquid includes:

[0068] ①. In a clean container, first add accurately weighed lipase, chelating agent, stabilizer and preservative. Use a stirrer to stir at a low speed to ensure that the solid ingredients are fully mixed.

[0069] ②. Dissolve the nonionic surfactant: Add the nonionic surfactant to the above mixture and continue stirring until the nonionic surfactant is completely dissolved in the solid mixture.

[0070] ③. Add environmentally friendly solvent: Slowly add environmentally friendly solvent (isopropyl alcohol) to the mixture while continuing to stir. This ensures that the solvent is fully mixed with the solid ingredients and helps dissolve other ingredients.

[0071] ④. Add deionized water: While stirring continuously, gradually add deionized water. The speed of adding water should not be too fast to avoid uneven concentration in some parts of the mixture.

[0072] ⑤. Stir thoroughly: After all ingredients are added, increase the stirring speed to ensure that the entire mixture is fully stirred and evenly mixed. The stirring time usually takes 15-30 minutes, until all ingredients are completely dissolved and a uniform degreasing agent is formed.

[0073] In step S5, the power density of the ultrasonic device should be controlled at 0.5-1 watt / cm2, and the treatment time is set to 40±5 minutes. The concentration of the environmentally friendly surfactant in the aqueous solution is 0.8%, and the water temperature is maintained at 65±5°C by the temperature control system.

[0074] In step S6, the flow rate of the rinse water should be maintained at 2-4 liters / minute, and the rinsing time should be at least 35 minutes. The pH value of the rinse water should be between 6.5-7.5, and is monitored and adjusted in real time by a pH meter.

[0075] In step S7, the concentration of the hydrogen peroxide solution is 4%, and the pH value of the solution is adjusted to 8.5±0.5 by adding an appropriate amount of sodium carbonate or sulfuric acid. During the bleaching process, the temperature of the solution should be maintained at 45±3°C, and the bleaching time is 90±10 minutes.

[0076] In step S9, the concentration of the citric acid solution is 1.5%, and the pH value of the solution is adjusted to 4.5±0.5. The soaking time at room temperature is 20±3 minutes, and the gauze should be gently stirred during the soaking process to ensure that the gauze is fully in contact with the softening solution.

[0077] In step S10, when sterilizing with high temperature and high pressure steam, the preheating time is set to 10 minutes. After reaching the set temperature and pressure, the sterilization time is maintained for 18±2 minutes. When sterilizing with ultraviolet light, the intensity of ultraviolet light should not be less than 1000μW / cm 2 , the irradiation distance is precisely 1 meter, and the irradiation time is adjusted to 35±5 minutes. The sterilized gauze should be tested for sterility to ensure that no microorganisms survive.

[0078] Embodiment 2:

[0079] A method for producing a medical absorbent gauze block integrating degreasing and bleaching, the method comprising the following steps:

[0080] S1: Choose high-quality pure cotton gauze as the raw material for producing medical absorbent gauze. Make sure the gauze is free of damage and impurities and meets medical standards;

[0081] S2: Cut the pure cotton gauze according to the required size, ensuring that the cutting edges are neat and free of burrs;

[0082] S3: placing the cut gauze into a pretreatment solution (such as a sodium hydroxide solution) for soaking to remove some impurities and grease on the surface of the gauze;

[0083] S4: Before degreasing, put the gauze into an aqueous solution containing a small amount of environmentally friendly surfactant, and then use ultrasonic equipment for pretreatment. The cavitation effect of ultrasonic waves helps to loosen and remove grease from the gauze; put the pretreated gauze into the prepared environmentally friendly degreasing solution and degrease at a temperature of 80-90℃. The degreasing time is about 1-2 hours to remove the grease from the gauze;

[0084] In step S4, the environmentally friendly degreasing liquid includes:

[0085] 2 parts by weight of lipase (biocatalyst);

[0086] 5 parts by weight of a chelating agent (such as citric acid);

[0087] 10 parts by weight of nonionic surfactant (such as polyoxyethylene ether);

[0088] 15 parts by weight of an environmentally friendly solvent (such as isopropyl alcohol);

[0089] Deionized water 80 parts by weight;

[0090] 3 parts by weight of a stabilizer (such as sodium carboxymethyl cellulose);

[0091] Preservative (such as sodium benzoate) 0.5 parts by weight.

[0092] S5: Turn on the ultrasonic equipment at the same time. The vibration and cavitation of the ultrasonic wave can accelerate the detachment of grease and improve the degreasing efficiency. During the ultrasonic-assisted degreasing process, the temperature is controlled between 60-70°C;

[0093] S6: Take out the degreased gauze and rinse it with plenty of clean water until the gauze becomes neutral without alkaline residue;

[0094] S7: Put the rinsed gauze into a bleaching solution (such as hydrogen peroxide solution) at an appropriate temperature (40-50°C) for bleaching. The bleaching time is about 1-2 hours to remove the pigment in the gauze;

[0095] S8: Take out the bleached gauze and rinse it again with plenty of clean water until the gauze becomes neutral and no bleach residue remains;

[0096] S9: Put the rinsed gauze into a softening solution (such as citric acid solution) and soak it at room temperature for a period of time to improve the softness of the gauze. Take out the softened gauze and rinse it again with a large amount of clean water until the gauze is neutral and no softener remains.

[0097] S10: sterilizing the rinsed gauze again, using high temperature and high pressure steam sterilization, ultraviolet sterilization and other methods to ensure the sanitation and safety of the medical absorbent gauze piece;

[0098] S11: Dry the sterilized medical absorbent gauze pieces and then pack them. The packaging process must be carried out in a sterile environment to ensure the hygiene and safety of the gauze pieces during transportation and storage, and then the entire production process of the integrated degreasing and bleaching medical absorbent gauze pieces can be completed.

[0099] In step S2, during the cutting process, ensure that the blade gap of the cutting tool is less than 0.5 mm to keep the cutting edge smooth. The cutting speed should be controlled at 10-15 meters per minute to avoid tearing the gauze due to excessive speed. The size error of the gauze block after cutting should be controlled within ± 2 mm to ensure the consistency of size.

[0100] In step S3, the concentration of the sodium hydroxide solution is precisely 5%, and the pH value of the solution is adjusted to 11±0.5 by adding a small amount of phosphoric acid or citric acid. During the soaking process, the temperature of the solution should be maintained at 23±3°C, and the soaking time is 45±5 minutes.

[0101] In step S4, the method for preparing the environmentally friendly degreasing liquid includes:

[0102] ①. In a clean container, first add accurately weighed lipase, chelating agent, stabilizer and preservative. Use a stirrer to stir at a low speed to ensure that the solid ingredients are fully mixed.

[0103] ②. Dissolve the nonionic surfactant: Add the nonionic surfactant to the above mixture and continue stirring until the nonionic surfactant is completely dissolved in the solid mixture.

[0104] ③. Add environmentally friendly solvent: Slowly add environmentally friendly solvent (isopropyl alcohol) to the mixture while continuing to stir. This ensures that the solvent is fully mixed with the solid ingredients and helps dissolve other ingredients.

[0105] ④. Add deionized water: While stirring continuously, gradually add deionized water. The speed of adding water should not be too fast to avoid uneven concentration in some parts of the mixture.

[0106] ⑤. Stir thoroughly: After all ingredients are added, increase the stirring speed to ensure that the entire mixture is fully stirred and evenly mixed. The stirring time usually takes 15-30 minutes, until all ingredients are completely dissolved and a uniform degreasing agent is formed.

[0107] In step S5, the power density of the ultrasonic device should be controlled at 0.5-1 watt / cm2, and the treatment time is set to 40±5 minutes. The concentration of the environmentally friendly surfactant in the aqueous solution is 0.8%, and the water temperature is maintained at 65±5°C by the temperature control system.

[0108] In step S6, the flow rate of the rinse water should be maintained at 2-4 liters / minute, and the rinsing time should be at least 35 minutes. The pH value of the rinse water should be between 6.5-7.5, and is monitored and adjusted in real time by a pH meter.

[0109] In step S7, the concentration of the hydrogen peroxide solution is 4%, and the pH value of the solution is adjusted to 8.5±0.5 by adding an appropriate amount of sodium carbonate or sulfuric acid. During the bleaching process, the temperature of the solution should be maintained at 45±3°C, and the bleaching time is 90±10 minutes.

[0110] In step S9, the concentration of the citric acid solution is 1.5%, and the pH value of the solution is adjusted to 4.5±0.5. The soaking time at room temperature is 20±3 minutes, and the gauze should be gently stirred during the soaking process to ensure that the gauze is fully in contact with the softening solution.

[0111] In step S10, when sterilizing with high temperature and high pressure steam, the preheating time is set to 10 minutes. After reaching the set temperature and pressure, the sterilization time is maintained for 18±2 minutes. When sterilizing with ultraviolet light, the intensity of ultraviolet light should not be less than 1000μW / cm 2 , the irradiation distance is precisely 1 meter, and the irradiation time is adjusted to 35±5 minutes. The sterilized gauze should be tested for sterility to ensure that no microorganisms survive.

[0112] Embodiment three:

[0113] A method for producing a medical absorbent gauze block integrating degreasing and bleaching, the method comprising the following steps:

[0114] S1: Choose high-quality pure cotton gauze as the raw material for producing medical absorbent gauze. Make sure the gauze is free of damage and impurities and meets medical standards;

[0115] S2: Cut the pure cotton gauze according to the required size, ensuring that the cutting edges are neat and burr-free;

[0116] S3: placing the cut gauze into a pretreatment solution (such as a sodium hydroxide solution) for soaking to remove some impurities and grease on the surface of the gauze;

[0117] S4: Before degreasing, put the gauze into an aqueous solution containing a small amount of environmentally friendly surfactant, and then use ultrasonic equipment for pretreatment. The cavitation effect of ultrasonic waves helps to loosen and remove grease from the gauze; put the pretreated gauze into the prepared environmentally friendly degreasing solution and degrease at a temperature of 80-90℃. The degreasing time is about 1-2 hours to remove the grease from the gauze;

[0118] In step S4, the environmentally friendly degreasing liquid includes:

[0119] Lipase (biocatalyst) 1.5 parts by weight;

[0120] 4 parts by weight of a chelating agent (such as citric acid);

[0121] 8 parts by weight of nonionic surfactant (such as polyoxyethylene ether);

[0122] 13 parts by weight of an environmentally friendly solvent (such as isopropyl alcohol);

[0123] Deionized water 70 parts by weight;

[0124] 2 parts by weight of a stabilizer (such as sodium carboxymethyl cellulose);

[0125] Preservative (such as sodium benzoate) 0.4 parts by weight.

[0126] S5: Turn on the ultrasonic equipment at the same time. The vibration and cavitation of the ultrasonic wave can accelerate the detachment of grease and improve the degreasing efficiency. During the ultrasonic-assisted degreasing process, the temperature is controlled between 60-70°C;

[0127] S6: Take out the degreased gauze and rinse it with plenty of clean water until the gauze becomes neutral without alkaline residue;

[0128] S7: Put the rinsed gauze into a bleaching solution (such as hydrogen peroxide solution) at an appropriate temperature (40-50°C) for bleaching. The bleaching time is about 1-2 hours to remove the pigment in the gauze;

[0129] S8: Take out the bleached gauze and rinse it again with plenty of clean water until the gauze becomes neutral and no bleach residue remains;

[0130] S9: Put the rinsed gauze into a softening solution (such as citric acid solution) and soak it at room temperature for a period of time to improve the softness of the gauze. Take out the softened gauze and rinse it again with a large amount of clean water until the gauze is neutral and no softener remains.

[0131] S10: sterilizing the rinsed gauze again, using high temperature and high pressure steam sterilization, ultraviolet sterilization and other methods to ensure the sanitation and safety of the medical absorbent gauze piece;

[0132] S11: Dry the sterilized medical absorbent gauze pieces and then pack them. The packaging process must be carried out in a sterile environment to ensure the hygiene and safety of the gauze pieces during transportation and storage, and then the entire production process of the integrated degreasing and bleaching medical absorbent gauze pieces can be completed.

[0133] In step S2, during the cutting process, ensure that the blade gap of the cutting tool is less than 0.5 mm to keep the cutting edge smooth. The cutting speed should be controlled at 10-15 meters per minute to avoid tearing the gauze due to excessive speed. The size error of the gauze block after cutting should be controlled within ± 2 mm to ensure the consistency of size.

[0134] In step S3, the concentration of the sodium hydroxide solution is precisely 5%, and the pH value of the solution is adjusted to 11±0.5 by adding a small amount of phosphoric acid or citric acid. During the soaking process, the temperature of the solution should be maintained at 23±3°C, and the soaking time is 45±5 minutes.

[0135] In step S4, the method for preparing the environmentally friendly degreasing liquid includes:

[0136] ①. In a clean container, first add accurately weighed lipase, chelating agent, stabilizer and preservative. Use a stirrer to stir at a low speed to ensure that the solid ingredients are fully mixed.

[0137] ②. Dissolve the nonionic surfactant: Add the nonionic surfactant to the above mixture and continue stirring until the nonionic surfactant is completely dissolved in the solid mixture.

[0138] ③. Add environmentally friendly solvent: Slowly add environmentally friendly solvent (isopropyl alcohol) to the mixture while continuing to stir. This ensures that the solvent is fully mixed with the solid ingredients and helps dissolve other ingredients.

[0139] ④. Add deionized water: While stirring continuously, gradually add deionized water. The speed of adding water should not be too fast to avoid uneven concentration in some parts of the mixture.

[0140] ⑤. Stir thoroughly: After all ingredients are added, increase the stirring speed to ensure that the entire mixture is fully stirred and evenly mixed. The stirring time usually takes 15-30 minutes, until all ingredients are completely dissolved and a uniform degreasing agent is formed.

[0141] In step S5, the power density of the ultrasonic device should be controlled at 0.5-1 watt / cm2, and the treatment time is set to 40±5 minutes. The concentration of the environmentally friendly surfactant in the aqueous solution is 0.8%, and the water temperature is maintained at 65±5°C by the temperature control system.

[0142] In step S6, the flow rate of the rinse water should be maintained at 2-4 liters / minute, and the rinsing time should be at least 35 minutes. The pH value of the rinse water should be between 6.5-7.5, and is monitored and adjusted in real time by a pH meter.

[0143] In step S7, the concentration of the hydrogen peroxide solution is 4%, and the pH value of the solution is adjusted to 8.5±0.5 by adding an appropriate amount of sodium carbonate or sulfuric acid. During the bleaching process, the temperature of the solution should be maintained at 45±3°C, and the bleaching time is 90±10 minutes.

[0144] In step S9, the concentration of the citric acid solution is 1.5%, and the pH value of the solution is adjusted to 4.5±0.5. The soaking time at room temperature is 20±3 minutes, and the gauze should be gently stirred during the soaking process to ensure that the gauze is fully in contact with the softening solution.

[0145] In step S10, when sterilizing with high temperature and high pressure steam, the preheating time is set to 10 minutes. After reaching the set temperature and pressure, the sterilization time is maintained for 18±2 minutes. When sterilizing with ultraviolet light, the intensity of ultraviolet light should not be less than 1000μW / cm 2 , the irradiation distance is precisely 1 meter, and the irradiation time is adjusted to 35±5 minutes. The sterilized gauze should be tested for sterility to ensure that no microorganisms survive.

[0146] From the above, we can know that:

[0147] In the present invention, in terms of degreasing efficiency, the environmentally friendly degreasing liquid can quickly and effectively decompose and remove fat and grease on the gauze through its unique formula, greatly shorten the processing time, and improve production efficiency, which is particularly important for batch production. The degreasing agent adopts components with good biodegradability and low toxicity, reduces the pollution to soil and water bodies, complies with environmental protection laws and regulations, helps enterprises to achieve green production, and enhances social image. The high efficiency of the environmentally friendly degreasing liquid reduces the consumption of raw materials and reduces production costs. At the same time, its stability and long shelf life also reduce the waste caused by product deterioration, and further improve economic benefits. The degreasing agent can ensure that the gauze is not damaged during the degreasing process, maintains its original physical properties, such as softness, water absorption and air permeability, so as to produce higher quality medical gauze blocks. At the same time, the environmentally friendly degreasing liquid does not contain harmful substances, is non-irritating to human skin, is suitable for the cleaning treatment of medical supplies, and ensures the health and safety of medical staff and patients.

[0148] In the present invention, the size consistency and surface smoothness of the gauze block are ensured through precise cutting and pretreatment steps, thereby improving the overall quality of the product. The precise parameter setting of the cutting tool and the optimized ratio of the pretreatment liquid effectively reduce the edge burrs and size errors of the gauze block, making the final product more suitable for the fine requirements in medical operations. In addition, precise process parameter control is adopted in key steps such as bleaching, softening and sterilization, which significantly improves the sterility and safety of the product. Hydrogen peroxide bleaching and citric acid softening treatment not only ensure the cleanliness and softness of the gauze block, but also avoid the harmful residues that may be caused by traditional chemicals. Especially in the sterilization step, the combination of high-temperature and high-pressure steam sterilization and ultraviolet sterilization ensures the high-standard sterile state of the medical absorbent gauze block, effectively reducing the risk of infection in patients during use. These measures work together to make the produced medical absorbent gauze block have higher reliability and applicability in medical practice.

[0149] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0150] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for producing a medical absorbent gauze block integrating degreasing and bleaching, characterized in that: The method comprises the following steps: S1: Select high-quality pure cotton gauze as the raw material for producing medical absorbent gauze blocks; Ensure that the gauze is free of damage and impurities and meets medical standards; S2: Cut the pure cotton gauze according to the required size, ensuring that the cutting edges are neat and burr-free; S3: placing the cut gauze into a pretreatment solution for soaking to remove some impurities and grease on the surface of the gauze; S4: Before degreasing, the gauze is first placed in an aqueous solution containing a small amount of environmentally friendly surfactant, and then pre-treated using an ultrasonic device; the cavitation effect of the ultrasonic wave helps to loosen and remove the grease in the gauze; the pre-treated gauze is placed in the prepared environmentally friendly degreasing solution and degreased at a temperature of 80-90°C; the degreasing time is about 1-2 hours to remove the grease in the gauze; S5: Turn on the ultrasonic equipment at the same time; the vibration and cavitation of the ultrasonic wave accelerate the detachment of grease and improve the degreasing efficiency. During the ultrasonic-assisted degreasing process, the temperature is controlled between 60-70°C; S6: Take out the degreased gauze and rinse it with plenty of clean water until the gauze becomes neutral without alkaline residue; S7: putting the rinsed gauze into a bleaching solution and bleaching it at an appropriate temperature; the bleaching time is about 1-2 hours to remove the pigment in the gauze; S8: Take out the bleached gauze and rinse it again with plenty of clean water until the gauze becomes neutral and no bleach residue remains; S9: Put the rinsed gauze into the softening solution and soak it at room temperature for a period of time to improve the softness of the gauze. Take out the softened gauze and rinse it again with a large amount of clean water until the gauze is neutral and no softener remains. S10: sterilizing the rinsed gauze again, which may be sterilized by high temperature and high pressure steam sterilization or ultraviolet sterilization to ensure the sanitation and safety of the medical absorbent gauze piece; S11: Dry the sterilized medical absorbent gauze blocks and then package them; the packaging process must be carried out in a sterile environment to ensure the hygiene and safety of the gauze blocks during transportation and storage, and then the entire production process of the integrated degreasing and bleaching medical absorbent gauze blocks can be completed.

2. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S2, during the cutting process, ensure that the blade gap of the cutting tool is less than 0.5 mm, and the cutting speed should be controlled at 10-15 meters per minute.

3. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S3, the concentration of the sodium hydroxide solution is precisely 5%, and the pH value of the solution is adjusted to 11±0.5 by adding a small amount of phosphoric acid or citric acid; during the immersion process, the temperature of the solution should be maintained at 23±3°C, and the immersion time is 45±5 minutes.

4. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S4, the environmentally friendly degreasing liquid includes: Lipase 1-2 parts by weight; 3-5 parts by weight of chelating agent; 5-10 parts by weight of nonionic surfactant; 10-15 parts by weight of environmentally friendly solvent; Deionized water 67-80 parts by weight; 1-3 parts by weight of stabilizer; Preservatives 0.1-0.5 parts by weight.

5. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S4, the method for preparing the environmentally friendly degreasing liquid includes: ①. In a clean container, first add accurately weighed lipase, chelating agent, stabilizer and preservative; use a stirrer to stir at a low speed to ensure that the solid ingredients are fully mixed; ② Dissolving the nonionic surfactant: Add the nonionic surfactant to the above mixture; continue stirring until the nonionic surfactant is completely dissolved in the solid mixture; ③. Add environmentally friendly solvent: slowly add environmentally friendly solvent to the mixture while continuing to stir; this ensures that the solvent is fully mixed with the solid ingredients and helps dissolve other ingredients; ④. Add deionized water: Add deionized water gradually while stirring continuously. The speed of adding water should not be too fast to avoid uneven concentration in some parts of the mixture. ⑤. Stir thoroughly: After all ingredients are added, increase the stirring speed to ensure that the entire mixture is fully stirred and evenly mixed; the stirring time takes 15-30 minutes, until all ingredients are completely dissolved to form a uniform degreasing agent.

6. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S5, the power density of the ultrasonic device is controlled at 0.5-1 watt / cm2, and the treatment time is set to 40±5 minutes; the concentration of the environmentally friendly surfactant in the aqueous solution is 0.8%, and the water temperature is maintained at 65±5°C by the temperature control system.

7. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S6, the flow rate of the rinsing water is maintained at 2-4 liters / minute, and the rinsing time is at least 35 minutes; the pH value of the rinsing water is between 6.5-7.5, and is monitored and adjusted in real time by a pH meter.

8. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S7, the concentration of the hydrogen peroxide solution is 4%, and the pH value of the solution is adjusted to 8.5±0.5 by adding an appropriate amount of sodium carbonate or sulfuric acid; during the bleaching process, the temperature of the solution is maintained at 45±3° C., and the bleaching time is 90±10 minutes.

9. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S9, the concentration of the citric acid solution is 1.5%, and the pH value of the solution is adjusted to 4.5±0.5; the soaking time at room temperature is 20±3 minutes.

10. A method for producing a medical absorbent gauze block integrating degreasing and bleaching as claimed in claim 1, characterized in that: In step S10, when sterilizing with high temperature and high pressure steam, the preheating time is set to 10 minutes. After reaching the set temperature and pressure, the sterilization time is maintained for 18±2 minutes. When sterilizing with ultraviolet light, the intensity of ultraviolet light is not less than 1000μW / cm 2 The irradiation distance is precisely 1 meter, and the irradiation time is adjusted to 35±5 minutes; the sterilized gauze is tested for sterility to ensure that no microorganisms survive.