A long-acting bacteria-blocking surgical gown and its manufacturing method

Abstract

This application relates to the field of surgical gowns, and specifically discloses a long-acting bacteria-blocking surgical gown and its manufacturing method. A long-acting bacteria-blocking surgical gown comprises, from the inside out, a non-woven fabric layer, a waterproof layer, a fiber layer, and an antibacterial layer in sequence. The fiber layer contains aramid fiber, glass fiber, antibacterial particles, and EVA particles. The antibacterial layer is prepared by spraying propolis solution and then coating and bonding a semi-permeable membrane on antibacterial non-woven fabric to coat silver-loaded silica gel particles. Its manufacturing method is as follows: spraying EVA molten liquid on the surface of the non-woven fabric layer, and adhering the waterproof layer to the surface of the non-woven fabric layer; mixing aramid fiber and glass fiber to obtain composite fiber; spraying EVA molten liquid on the surface of the composite fiber, and then spraying antibacterial particles to obtain a mixture; after drying, the mixture forms a fiber layer to obtain a composite layer; spraying EVA molten liquid on the surface of the fiber layer and then adhering the antibacterial layer, and after drying and cutting, a surgical gown is obtained, enabling the surgical gown to have the advantages of long-acting bacteria blocking, good air permeability, and reusability at the same time.

Description

Technical Field

[0001] The present application relates to the field of surgical gowns, and more specifically, to a long-acting bacteria-blocking surgical gown and a manufacturing method thereof. Background Art

[0002] Medical staff need to change into surgical gowns before entering the operating room for surgery. Surgical gowns can not only ensure the cleanliness of the operating room but also protect medical staff. During the process of implementing medical first aid, medical staff will inevitably come into contact with patients' blood and body fluids, which may often carry viruses such as HBV, HCV, HIV, etc. These viruses are transmitted through blood. Therefore, to avoid the splashing of virus-carrying blood or tissue fluid onto medical staff and affect the health of medical staff, surgical gowns are essential for medical staff.

[0003] Surgical gowns are generally divided into cotton surgical gowns, high-density polyester fiber surgical gowns, composite surgical gowns, polypropylene spunbonded fabrics, etc. Cotton surgical gowns have good air permeability, but poor virus protection effect and are prone to flocculent shedding, thus easily affecting the safety of the surgical process; high-density polyester fiber surgical gowns have certain hydrophobicity and can prevent blood, tissue fluid, etc. from penetrating into the interior of the surgical gown. However, the hydrophobic effect of the surgical gown is likely to affect the retention and adhesion effect of blood and tissue fluid on the surface of the surgical gown. If blood, tissue fluid, etc. flow on the surface of the surgical gown and flow to the seams between the surgical gown and gloves or other positions, it is easy to cause poor infection for medical staff; composite surgical gowns are composed of multiple materials and have good hydrophobic and antibacterial effects, but their air permeability is easily affected; polypropylene spunbonded fabric is a disposable surgical gown that cannot be recycled and has a poor virus barrier effect, and can only be used as a sterile surgical gown.

[0004] Therefore, how to obtain a surgical gown that simultaneously has long-acting bacteria blocking, good air permeability, and can be reused is a problem to be solved. Summary of the Invention

[0005] In order to obtain a surgical gown that simultaneously has long-acting bacteria blocking, good air permeability, and can be reused, the present application provides a long-acting bacteria-blocking surgical gown and a manufacturing method thereof.

[0006] In the first aspect, the present application provides a long-acting bacteria-blocking surgical gown, adopting the following technical solution:

[0007] A long-acting bacteria-blocking surgical gown, the surgical gown sequentially includes a non-woven fabric layer, a waterproof layer, a fiber layer, and an antibacterial layer from inside to outside; the fiber layer contains the following raw materials in parts by weight: 20 - 40 parts of aramid fiber, 30 - 60 parts of glass fiber, 10 - 20 parts of antibacterial particles, and 10 - 15 parts of EVA particles;

[0008] The antibacterial layer is prepared by spraying propolis liquid and bonding a semi-permeable membrane coated with silver-loaded silica gel particles on the antibacterial non-woven fabric in sequence.

[0009] By adopting the above technical solution, the antibacterial layer, the fiber layer and the waterproof layer cooperate with each other. The antibacterial layer on the outermost layer of the surgical gown is used to initially kill and block the virus on the surgical gown; the fiber network structure in the fiber layer further blocks the germs and prevents the virus from penetrating the surgical gown; combined with the waterproof function of the waterproof layer, it blocks the penetration of germs carried by liquids such as blood and tissue fluid into the interior of the surgical gown, thereby protecting medical staff from being easily infected by the virus carried in the blood and tissue fluid.

[0010] The antibacterial non-woven fabric and silica gel particles in the antibacterial layer have a certain degree of moisture absorption effect. When blood adheres to the surface of the surgical gown, the antibacterial non-woven fabric and silica gel particles can adsorb the blood and tissue fluid, so that the virus in the blood and tissue fluid is also adhered to the surface of the antibacterial layer, minimizing the flow of blood on the surface of the surgical gown; then the antibacterial effect of the antibacterial non-woven fabric is used to kill the virus attached to the surface of the antibacterial non-woven fabric, and the semi-permeable membrane in the semi-permeable membrane coated with silver-loaded silica gel particles is permeable to water, but the loaded silver is not easily detached from the silica gel particles, so that the virus in the blood and tissue fluid adsorbed by the silica gel particles can also be killed, realizing the inhibition and killing of the virus by the antibacterial layer.

[0011] When the used surgical gown is washed with chlorine disinfectant and then subjected to air drying treatment at 80 - 100 °C, during the drying process, the air is kept blowing in from the non-woven fabric layer and out from the antibacterial layer; during the drying process, the EVA particles gradually melt, so that the fiber layer and the antibacterial layer are more stably bonded to the surfaces of the non-woven fabric layer and the waterproof layer, enabling the surgical gown to be reused multiple times after being washed; and by using the long-term antibacterial and virus-killing effects of the antibacterial non-woven fabric, propolis liquid, and semi-permeable membrane coated with silver-loaded silica gel particles, the surgical gown has a long-term bacteria-blocking effect, and at the same time, combined with the antibacterial effect of the antibacterial particles in the fiber layer, the long-term bacteria-blocking property of the surgical gown is further improved.

[0012] The non-woven fabric layer and the fiber layer cooperate with each other. By using the air permeability of the non-woven fabric layer and the air permeability effect of the fiber layer network structure, the surgical gown has good air permeability, thereby improving the comfort of medical staff wearing the surgical gown.

[0013] Preferably, the antibacterial particles are composed of chitosan-modified carbon fibers, EVA particles and silver ion antibacterial agents with a mass ratio of 1:0.1 - 0.3:0.4 - 1.

[0014] By adopting the above technical solution, the chitosan-modified carbon fiber, EVA particles, and silver ion antibacterial agent are combined. When the surgical gown is dried by hot air after washing, the fluidity of the melted EVA is utilized in combination with the smoothness of the carbon fiber surface, which easily causes the slow migration of the silver ion antibacterial agent. Since the silver ions in the silver ion antibacterial agent are positively charged, and the chitosan amino groups on the surface of the carbon fiber are also positively charged, it is easy for the silver ion antibacterial agent to move towards the surface of the antibacterial layer. After hot air drying, the silver ion antibacterial agent in the fiber layer further provides antibacterial effect for the antibacterial layer, thereby achieving the long-term antibacterial effect of the surgical gown.

[0015] Preferably, the chitosan-modified carbon fiber is prepared by modifying carbon fiber with chitosan solution.

[0016] By adopting the above technical solution, chitosan is loaded on the surface of the carbon fiber. On the one hand, the antibacterial and antiviral effects of chitosan are utilized to endow the fiber layer with antibacterial and antiviral effects. On the other hand, when the EVA melts, with the carbon fiber as the guide, it is easy for some antibacterial particles to move in position to maintain the antibacterial effect of the antibacterial layer on the surface of the surgical gown.

[0017] Preferably, the propolis solution is composed of a hot-melt propolis solution and a terpene resin solution with a mass ratio of 1:0.2 - 0.5.

[0018] By adopting the above technical solution, the hot-melt propolis solution and the terpene resin are combined, which has a good waterproof effect and can prevent blood from adhering to the surface of the antibacterial non-woven fabric and affecting the adhesion stability of the semi-permeable membrane-coated silver-loaded silica gel particles. With the good heat resistance and aging resistance of the terpene resin, during the hot air drying process, the semi-permeable membrane-coated silver-loaded silica gel particles are still protected to adhere stably to the surface of the antibacterial layer. At the same time, the terpene resin has good compatibility with EVA, thereby improving the adhesion stability between the antibacterial layer and the fiber layer, ensuring that the antibacterial layer is not easily detached from the surface of the surgical gown during the washing and hot air drying processes of the surgical gown, and thus ensuring the long-term bacteria-blocking advantage of the surgical gown.

[0019] Preferably, the semi-permeable membrane-coated silver-loaded silica gel particles are prepared by the following method:

[0020] The silica gel particles are soaked and stirred in a nano-silver antibacterial solution, and then the silica gel particles are taken out to obtain silver-loaded silica gel particles.

[0021] Weigh the silk fibroin solution and the chitosan solution according to a mass ratio of 1:0.1 - 0.3, mix and stir evenly to obtain a preliminary mixture.

[0022] Weigh the preliminary mixture and glutaraldehyde according to a mass ratio of 100:2 - 7, mix and stir evenly to obtain a coating solution. The coating solution is evenly sprayed on the surface of the silver-loaded silica gel particles, and after drying, the coating solution forms a semi-permeable membrane to obtain the finished product.

[0023] By adopting the above technical solution, the silica gel particles and the nano silver dispersion liquid cooperate with each other. The nano silver dispersion liquid is loaded by using the pore structure of the silica gel particles, and then a semi-permeable membrane is formed by cross-linking the silk fibroin solution and the chitosan solution. The semi-permeable membrane can permeate liquids but not solid particles, protecting the nano silver to stably exist in the silica gel particles. The blood, tissue fluid, etc. adhering to the surgical gown can be adsorbed, causing substances such as viruses and bacteria to gradually come into contact with the nano silver, realizing the inhibition and killing of viruses, so that the surgical gown has good antibacterial properties.

[0024] The antibacterial particles and the semi-permeable membrane-coated silver-loaded silica gel particles cooperate with each other. As the drying operation progresses, when the EVA melts and partially flows, by using the positive charges on the surface of chitosan on the carbon fiber in the antibacterial particles and the positive charge of silver ions, and cooperating with the negative charges carried by the carboxyl and hydroxyl groups on the surface of silk fibroin and gellan gum on the semi-permeable membrane-coated silver-loaded silica gel particles, the antibacterial particles and the silver ion antibacterial agent move towards the direction close to the semi-permeable membrane-coated silver-loaded silica gel particles, thereby further maintaining the antibacterial property on the surface of the surgical gown and making the surgical gown have the advantage of long-term antibacterial.

[0025] Preferably, the waterproof layer is a polytetrafluoroethylene membrane.

[0026] By adopting the above technical solution, the polytetrafluoroethylene membrane has a good waterproof effect and a certain degree of air permeability, enabling the surgical gown to have good air permeability while being able to block the penetration of blood to the inside of the surgical gown, thereby protecting medical staff from being easily infected by virus-carrying blood.

[0027] Preferably, the aramid fiber is a chitosan-modified aramid fiber, and the glass fiber is a chitosan-modified glass fiber.

[0028] By adopting the above technical solution, during the preparation process of the fiber layer, by using the good compatibility and adhesiveness of terpene resin and EVA, the aramid fiber and the glass fiber are relatively stably bonded to the surface of the waterproof layer. And the addition amount of the glass fiber is relatively high. By using the positive charge carried by chitosan on the surface of the glass fiber to cooperate with the antibacterial particles, it further promotes the gradual migration of the antibacterial particles towards the antibacterial layer after the EVA melts, thereby further extending the antibacterial time of the antibacterial layer and making the surgical gown have the advantage of long-term antibacterial.

[0029] In the second aspect, the present application provides a method for manufacturing a long-term antibacterial surgical gown, adopting the following technical solution: A method for manufacturing a long-term antibacterial surgical gown includes the following steps:

[0030] S1. Take a non-woven fabric layer, evenly spray an EVA molten liquid on the surface of the non-woven fabric layer, and then adhere the waterproof layer to the surface of the non-woven fabric layer;

[0031] S2. Uniformly mix aramid fibers and glass fibers to obtain composite fibers; then heat-melt EVA particles to obtain a molten EVA solution; uniformly spray the molten EVA solution onto the surface of the composite fibers, and then uniformly spray antibacterial particles to obtain a mixture; uniformly coat the mixture on the surface of the waterproof layer away from the non-woven fabric layer, and after drying treatment, the mixture forms a fiber layer to obtain a composite layer.

[0032] S3. Uniformly spray the molten EVA solution on the surface of the fiber layer of the composite layer, and then adhere the antibacterial layer to the surface of the fiber layer. After drying and cutting treatment, a finished surgical gown is obtained.

[0033] By adopting the above technical solution, the EVA particles are heat-melted to form a molten EVA solution. Under the bonding action of the molten EVA solution, the waterproof layer is stably attached to the surface of the non-woven fabric layer; the aramid fibers, glass fibers and antibacterial particles are bonded under the bonding action of the molten EVA solution to form a fiber layer with a network structure bonded to the surface of the waterproof layer. Finally, under the bonding action of the molten EVA solution, the antibacterial layer is bonded to the surface of the fiber layer, making the finished surgical gown have the advantages of long-term antibacterial, good air permeability and reusability.

[0034] When the surgical gown is washed with chlorine disinfectant and then dried by hot air, the EVA is repeatedly heat-melted and cooled and solidified at a heat-melting temperature of 80-100 °C, ensuring stable bonding between the non-woven fabric layer, the waterproof layer, the fiber layer and the antibacterial layer, so that the finished surgical gown has the advantages of reusability and long-term antibacterial.

[0035] Preferably, the antibacterial layer in S3 is prepared by the following method:

[0036] Uniformly spray propolis solution on the surface of silver-loaded silica gel particles coated with a semi-permeable membrane according to a mass ratio of 1:0.2-0.5, and then uniformly spray it onto the surface of antibacterial non-woven fabric. The mass ratio of the antibacterial non-woven fabric to the silver-loaded silica gel particles coated with a semi-permeable membrane is 1:0.2-0.6. After drying, a finished antibacterial layer is obtained.

[0037] By adopting the above technical solution, the antibacterial layer has a good antibacterial effect and can provide partial storage space for antibacterial particles, making the finished surgical gown have the advantage of long-term antibacterial.

[0038] Preferably, the antibacterial non-woven fabric is prepared by soaking polyester non-woven fabric in Scutellaria baicalensis extract.

[0039] By adopting the above technical scheme, polyester non-woven fabric and scutellaria extract are combined, and the advantages of polyester non-woven fabric being moisture-absorbent and water-permeable and preventing particles from penetrating are utilized, so that it is easy to pass through blood and prevent other substances from entering the surgical gown; and in the preparation process of the antibacterial non-woven fabric, the moisture-absorbing effect of the polyester non-woven fabric is utilized to facilitate the attachment of the scutellaria extract to the surface of the polyester non-woven fabric, and the hydroxyl groups of baicalin in the scutellaria extract are combined with the hydroxyl groups and carboxyl groups on the surface of the semipermeable membrane-coated silver-loaded silica gel particles to further improve the adhesion stability of the semipermeable membrane-coated silver-loaded silica gel particles on the surface of the antibacterial non-woven fabric, and it is easy to attract the antibacterial particles to move toward the antibacterial layer, so that the antibacterial layer has the advantage of long-lasting antibacterial effect, thereby making the surgical gown have a long-lasting antibacterial effect.

[0040] In summary, this application has the following beneficial effects:

[0041] 1. The antibacterial layer, fiber layer and waterproof layer work together to use the antibacterial layer on the outermost layer of the surgical gown to achieve the initial killing and blocking of viruses; the fiber network structure in the fiber layer further blocks the pathogens and prevents the virus from penetrating the surgical gown; and the waterproof effect of the waterproof layer blocks the blood, tissue fluid and other liquids from carrying pathogens to the inside of the surgical gown, thereby protecting medical staff from being easily infected by viruses carried in the blood and tissue fluid.

[0042] 2. The antibacterial particles and semipermeable membrane-coated silver-loaded silica gel particles are combined. As the drying operation proceeds, when the EVA hot melt produces partial flow, the positive charge of chitosan on the surface of carbon fiber in the antibacterial particles and the positive charge of silver ions, combined with the negative charge of carboxyl and hydroxyl groups on the surface of silk fibroin and gellan gum on the semipermeable membrane-coated silver-loaded silica gel particles, make the antibacterial particles and silver ion antibacterial agents move toward the direction close to the semipermeable membrane-coated silver-loaded silica gel particles, thereby further maintaining the antibacterial properties of the surgical gown surface and giving the surgical gown the advantage of long-lasting bacteria resistance.

[0043] 3. Aramid fiber, glass fiber, and polyester non-woven fabric are combined to further improve the strength of surgical gowns and avoid them being scratched by scissors or other sharp instruments during surgery. DETAILED DESCRIPTION

[0044] The present application is further described in detail below with reference to the embodiments.

[0045] Preparation example of antibacterial granules

[0046] The silver ion antibacterial agent in the following raw materials was purchased from Wujiang Jincheng Fine Chemical Co., Ltd.; other raw materials and equipment were commonly available on the market.

[0047] Preparation Example 1: Antibacterial particles were prepared by the following method:

[0048] Weigh chitosan and dissolve it in a 2% aqueous solution of dilute acetic acid to obtain a 5% solution. The deacetylation degree of chitosan is 98%, and the mass fraction of the dilute acetic acid aqueous solution is 2%. Add 5 g of glutaraldehyde to 100 g of the solution and stir evenly to obtain a chitosan solution.

[0049] Weigh 1 kg of carbon fiber, mix and stir it evenly in 10 kg of the chitosan solution, then filter out the carbon fiber to obtain chitosan-modified carbon fiber. The length of the carbon fiber is 0.3 mm.

[0050] Heat the EVA particles to 85 °C for melting to obtain an EVA melt. Uniformly spray 0.2 kg of the EVA melt on the surface of 1 kg of chitosan-modified carbon fiber, and then uniformly spray 0.7 kg of silver ion antibacterial agent. After drying, the finished antibacterial particles are obtained.

[0051] Preparation Example 2: The difference between this preparation example and Preparation Example 1 is as follows:

[0052] Heat the EVA particles to 85 °C for melting to obtain an EVA melt. Uniformly spray 0.1 kg of the EVA melt on the surface of 1 kg of chitosan-modified carbon fiber, and then uniformly spray 0.4 kg of silver ion antibacterial agent. After drying, the finished antibacterial particles are obtained.

[0053] Preparation Example 3: The difference between this preparation example and Preparation Example 1 is as follows:

[0054] Heat the EVA particles to 85 °C for melting to obtain an EVA melt. Uniformly spray 0.3 kg of the EVA melt on the surface of 1 kg of chitosan-modified carbon fiber, and then uniformly spray 1 kg of silver ion antibacterial agent. After drying, the finished antibacterial particles are obtained.

[0055] Preparation Example of Semipermeable Membrane-Coated Silver-Loaded Silica Particles

[0056] The silica particles in the following raw materials are purchased from Shandong Zhanze Biotechnology Co., Ltd.; the nano silver antibacterial liquid is purchased from Shangmeng Technology Wuxi Co., Ltd., and the particle size of the nano silver particles is 20 nm; other raw materials and equipment are all commercially available.

[0057] Preparation Example 4: The semipermeable membrane-coated silver-loaded silica particles are prepared by the following method:

[0058] Place 1 kg of silica particles in 10 kg of nano silver antibacterial liquid, soak and stir, and then take out the silica particles to obtain loaded silica particles.

[0059] The silk fibroin is obtained by degumming the cocoon shell, and then calcium chloride, absolute ethanol, and water are weighed according to a molar ratio of 1:2:8 and mixed and stirred to prepare a solution; 10 kg of dissolved silk fibroin is added to 100 kg of the solution and dissolved at 80 °C for 40 min to prepare a silk fibroin solution; after dialysis and purification treatment, a silk fibroin protein solution is prepared.

[0060] 100 kg of the silk fibroin protein solution and 20 kg of the chitosan solution are weighed and mixed and stirred evenly. The chitosan solution is a chitosan-dilute acetic acid solution with a mass fraction of 2%, and the mass fraction of the dilute acetic acid is 2% to prepare a preliminary mixture.

[0061] 100 kg of the preliminary mixture and 5 kg of glutaraldehyde are weighed and mixed and stirred evenly to prepare a coating solution; 1 kg of the coating solution is evenly sprayed onto the surface of 10 kg of silica gel particles loaded, and after drying, the coating solution forms a semi-permeable membrane to obtain the finished product, and the particle size of the finished product is 80 mesh.

[0062] Preparation Example 5: The difference between this preparation example and Preparation Example 4 is as follows:

[0063] 100 kg of the silk fibroin protein solution and 10 kg of the chitosan solution are weighed and mixed and stirred evenly. The chitosan solution is a chitosan-dilute acetic acid solution with a mass fraction of 2%, and the mass fraction of the dilute acetic acid is 2% to prepare a preliminary mixture.

[0064] 100 kg of the preliminary mixture and 2 kg of glutaraldehyde are weighed and mixed and stirred evenly to prepare a coating solution; 1 kg of the coating solution is evenly sprayed onto the surface of 10 kg of silica gel particles loaded, and after drying, the coating solution forms a semi-permeable membrane to obtain the finished product.

[0065] Preparation Example 6: The difference between this preparation example and Preparation Example 4 is as follows:

[0066] 100 kg of the silk fibroin protein solution and 30 kg of the chitosan solution are weighed and mixed and stirred evenly. The chitosan solution is a chitosan-dilute acetic acid solution with a mass fraction of 2%, and the mass fraction of the dilute acetic acid is 2% to prepare a preliminary mixture.

[0067] 100 kg of the preliminary mixture and 7 kg of glutaraldehyde are weighed and mixed and stirred evenly to prepare a coating solution; 1 kg of the coating solution is evenly sprayed onto the surface of 10 kg of silica gel particles loaded, and after drying, the coating solution forms a semi-permeable membrane to obtain the finished product.

[0068] Preparation Examples of the Antibacterial Layer

[0069] The terpene resin in the following raw materials is purchased from Guangzhou Qianyiyuan Synthetic Materials Technology Co., Ltd.; the commercially available Scutellaria baicalensis extract is purchased from Xi'an Xinweihe Organic Biotechnology Co., Ltd., extracted with ethanol, and the content of baicalin is 5%; other raw materials and equipment are all commercially available.

[0070] Preparation Example 7: The antibacterial layer is prepared by the following method:

[0071] Weigh propolis and heat it to 70 °C until it melts completely to obtain a molten propolis solution; heat terpene resin until it softens and melts to obtain a molten terpene resin solution; mix 1 kg of the molten propolis solution with 0.35 kg of terpene resin and stir evenly to obtain a propolis solution.

[0072] Add 0.5 kg of ethyl cellulose ethanol solution with a mass fraction of 1% (ethanol is anhydrous ethanol with a mass fraction of 99%) to 10 kg of commercially available Scutellaria baicalensis Georgi extract to obtain a Scutellaria baicalensis Georgi extract; place polyester non-woven fabric in the Scutellaria baicalensis Georgi extract, soak and stir for 20 min, then take out the polyester non-woven fabric and dry it to obtain an antibacterial non-woven fabric.

[0073] Spray 0.35 kg of the propolis solution prepared in Preparation Example 4 evenly on the surface of 1 kg of silver-loaded silica gel particles coated with a semi-permeable membrane, and then spray it evenly on the surface of the antibacterial non-woven fabric. The mass ratio of the antibacterial non-woven fabric to the silver-loaded silica gel particles coated with a semi-permeable membrane is 1:0.4. After drying, a finished antibacterial layer with a thickness of 0.5 mm is obtained.

[0074] Preparation Example 8: The difference between this preparation example and Preparation Example 7 is as follows:

[0075] Weigh propolis and heat it to 70 °C until it melts completely to obtain a molten propolis solution; heat terpene resin until it softens and melts to obtain a molten terpene resin solution; mix 1 kg of the molten propolis solution with 0.2 kg of terpene resin and stir evenly to obtain a propolis solution.

[0076] Spray 0.2 kg of the propolis solution evenly on the surface of 1 kg of silver-loaded silica gel particles coated with a semi-permeable membrane prepared in Preparation Example 5, and then spray it evenly on the surface of the antibacterial non-woven fabric. The mass ratio of the antibacterial non-woven fabric to the silver-loaded silica gel particles coated with a semi-permeable membrane is 1:0.2. After drying, a finished antibacterial layer is obtained.

[0077] Preparation Example 9: The difference between this preparation example and Preparation Example 7 is as follows:

[0078] Weigh propolis and heat it to 70 °C until it melts completely to obtain a molten propolis solution; heat terpene resin until it softens and melts to obtain a molten terpene resin solution; mix 1 kg of the molten propolis solution with 0.5 kg of terpene resin and stir evenly to obtain a propolis solution.

[0079] Spray 0.5 kg of the propolis solution evenly on the surface of 1 kg of silver-loaded silica gel particles coated with a semi-permeable membrane prepared in Preparation Example 6, and then spray it evenly on the surface of the antibacterial non-woven fabric. The mass ratio of the antibacterial non-woven fabric to the silver-loaded silica gel particles coated with a semi-permeable membrane is 1:0.6. After drying, a finished antibacterial layer is obtained.

[0080] Preparation Examples of Chitosan-Modified Aramid Fibers

[0081] Preparation Example 10: Chitosan-modified aramid fibers are prepared by the following method:

[0082] Weigh chitosan and place it in a dilute acetic acid solution, stir to dissolve it, and prepare a chitosan solution with a mass fraction of 5%; the deacetylation degree of chitosan is 98%, and the mass fraction of the dilute acetic acid solution is 2%;

[0083] Place aramid fibers in the chitosan solution, stir to disperse them, the length of the aramid fibers is 0.5 mm, then take out the aramid fibers and dry them to obtain the finished product.

[0084] Preparation example of chitosan-modified glass fiber

[0085] Preparation example 11: The chitosan-modified glass fiber is prepared by the following method:

[0086] Weigh chitosan and place it in a dilute acetic acid solution, stir to dissolve it, and prepare a chitosan solution with a mass fraction of 5%; the deacetylation degree of chitosan is 98%, and the mass fraction of the dilute acetic acid solution is 2%;

[0087] Place glass fibers in the chitosan solution, stir to disperse them, the length of the glass fibers is 0.5 mm, then take out the glass fibers and dry them to obtain the finished product.

[0088] Examples

[0089] Example 1: A long-acting bacteria-resistant surgical gown:

[0090] It successively includes a non-woven fabric layer, a waterproof layer, a fiber layer, and an antibacterial layer from the inside out;

[0091] The manufacturing method is as follows:

[0092] S1. Take non-woven fabric with a thickness of 0.4 mm as the non-woven fabric layer, evenly spray EVA molten liquid on the surface of the non-woven fabric, and then adhere the waterproof layer to the surface of the non-woven fabric layer and dry it. The EVA molten liquid solidifies into a bonding layer, and the thickness of the bonding layer is 0.05 mm; the waterproof layer is a polytetrafluoroethylene film, and the thickness of the polytetrafluoroethylene film is 0.1 mm;

[0093] S2. Uniformly mix 30 kg of aramid fibers and 50 kg of glass fibers to obtain composite fibers, then heat the EVA particles to 85 °C for melting to obtain EVA molten liquid; evenly spray 10 kg of EVA molten liquid on the surface of the composite fibers, and then evenly spray 15 kg of antibacterial particles prepared in Preparation Example 1 to obtain a mixture; evenly coat the mixture on the surface of the waterproof layer away from the non-woven fabric layer and dry it. The mixture forms a fiber layer with a thickness of 1 mm to obtain a composite layer;

[0094] S3. Uniformly spray the EVA molten liquid on the surface of the fiber layer on the composite layer, then adhere the antibacterial layer prepared in Preparation Example 7 to the surface of the fiber layer, and after drying and cutting, the EVA molten liquid solidifies into a bonding layer with a thickness of 0.05 mm to obtain the finished surgical gown.

[0095] Example 2: The difference between this example and Example 1 is that:

[0096] S2. Uniformly mix 20 kg of aramid fiber and 30 kg of glass fiber to obtain composite fiber, then heat the EVA particles to 85°C for hot melting to obtain the EVA molten liquid; uniformly spray 10 kg of the EVA molten liquid on the surface of the composite fiber, and then uniformly spray 10 kg of the antibacterial particles prepared in Preparation Example 2 to obtain a mixture; uniformly coat the mixture on the surface of the waterproof layer away from the non-woven fabric layer, and after drying, the mixture forms a fiber layer with a thickness of 1 mm to obtain a composite layer;

[0097] S3. Uniformly spray the EVA molten liquid on the surface of the fiber layer on the composite layer, then adhere the antibacterial layer prepared in Preparation Example 8 to the surface of the fiber layer, and after drying and cutting, the EVA molten liquid solidifies into a bonding layer with a thickness of 0.05 mm to obtain the finished surgical gown.

[0098] Example 3: The difference between this example and Example 1 is that:

[0099] S2. Uniformly mix 40 kg of aramid fiber and 60 kg of glass fiber to obtain composite fiber, then heat the EVA particles to 85°C for hot melting to obtain the EVA molten liquid; uniformly spray 15 kg of the EVA molten liquid on the surface of the composite fiber, and then uniformly spray 20 kg of the antibacterial particles prepared in Preparation Example 3 to obtain a mixture; uniformly coat the mixture on the surface of the waterproof layer away from the non-woven fabric layer, and after drying, the mixture forms a fiber layer with a thickness of 1 mm to obtain a composite layer;

[0100] S3. Uniformly spray the EVA molten liquid on the surface of the fiber layer on the composite layer, then adhere the antibacterial layer prepared in Preparation Example 9 to the surface of the fiber layer, and after drying and cutting, the EVA molten liquid solidifies into a bonding layer with a thickness of 0.05 mm to obtain the finished surgical gown.

[0101] Example 4: The difference between this example and Example 1 is that:

[0102] The aramid fiber is the chitosan-modified aramid fiber prepared in Preparation Example 10; the glass fiber is the chitosan-modified glass fiber prepared in Preparation Example 11.

[0103] Example 5: The difference between this example and Example 4 is that:

[0104] In the antibacterial particle raw material in the fiber layer, carbon fiber of the same mass is used to replace the chitosan-modified carbon fiber.

[0105] Example 6: The difference between this example and Example 4 is that:

[0106] In the antibacterial particle raw material in the fiber layer, an aqueous sodium alginate solution of the same mass is used to replace the EVA particles, and the mass fraction of the aqueous sodium alginate solution is 1%.

[0107] Example 7: The difference between this example and Example 4 is that:

[0108] No silver ion antibacterial agent is added to the antibacterial particle raw material in the fiber layer.

[0109] Example 8: The difference between this example and Example 4 is that:

[0110] No terpene resin is added to the propolis liquid raw material of the antibacterial layer.

[0111] Example 9: The difference between this example and Example 4 is that:

[0112] In the silver-loaded silica gel particles coated with a semi-permeable membrane in the antibacterial layer, silver powder of the same mass is used to replace the silica gel particles loaded.

[0113] Example 10: The difference between this example and Example 4 is that:

[0114] In the silver-loaded silica gel particles coated with a semi-permeable membrane in the antibacterial layer, a chitosan solution of the same mass is used to replace the silk fibroin solution.

[0115] Example 11: The difference between this example and Example 4 is that:

[0116] During the preparation of the antibacterial non-woven fabric, 1 kg of nano silver powder is weighed and dispersed in 99 kg of water to prepare a dispersion; then the polyester non-woven fabric is immersed in the dispersion and stirred for 20 min, and the antibacterial non-woven fabric is taken out and dried to obtain the finished product.

[0117] Comparative Example

[0118] Comparative Example 1: The difference between this comparative example and Example 1 is that:

[0119] In the surgical gown, a non-woven fabric layer of the same mass is used to replace the antibacterial layer, and the non-woven fabric layer is made of non-woven fabric.

[0120] Comparative Example 2: The difference between this comparative example and Example 1 is that:

[0121] In the surgical gown, a non-woven fabric layer of the same mass is used to replace the fiber layer, and the non-woven fabric layer is made of non-woven fabric.

[0122] Comparative Example 3: The difference between this comparative example and Example 1 is that:

[0123] In the surgical gown, the waterproof layer is replaced with a non-woven fabric layer of the same quality, and the non-woven fabric layer is made of non-woven fabric.

[0124] Comparative Example 4: The difference between this comparative example and Example 1 is that:

[0125] Antibacterial particles are not added to the raw materials of the fiber layer.

[0126] Comparative Example 5: The difference between this comparative example and Example 1 is that:

[0127] Propolis liquid and semi-permeable membrane-coated silver-loaded silica gel particles are not added to the antibacterial layer.

[0128] Performance detection test

[0129] 1. Antibacterial performance detection

[0130] Finished surgical gowns are prepared by using the manufacturing methods of Examples 1-11 and Comparative Examples 1-5. Refer to GB / T20944.2-2007 Evaluation of antibacterial properties of textiles - Part 2: Absorption method to detect the bacteriostatic rate of the finished surgical gowns and record the data; and after the surgical gown is used, it is washed with chlorine disinfectant solution and then hot air dried at 80-100 °C. The hot air flow direction is from the inside to the outside of the surgical gown. After the surgical gown is repeatedly washed and dried 50 times, the bacteriostatic rate is detected again and the data is recorded.

[0131] 2. Detection of wet-state microbial penetration resistance performance

[0132] Finished surgical gowns are prepared by using the manufacturing methods of Examples 1-11 and Comparative Examples 1-5. Refer to YY / T0506.6-2099 to detect the wet-state microbial penetration resistance of the surgical gown and record the data; and after the surgical gown is used, it is washed with chlorine disinfectant solution and then hot air dried at 80-100 °C. The hot air flow direction is from the inside to the outside of the surgical gown. After the surgical gown is repeatedly washed and dried 50 times, the wet-state microbial penetration resistance is detected again and the data is recorded.

[0133] 3. Air permeability detection

[0134] Finished surgical gowns are prepared by using the manufacturing method of Example 1. Refer to GB / T5453-1997 to detect the air permeability rate of the finished surgical gown and record the data.

[0135] 4. Flow performance detection

[0136] Finished surgical gowns are prepared by using the manufacturing methods of Examples 1-4, 9. Prepare and extract blood carrying the HIV virus, spray 20 mL of blood onto the surface of 1 square meter of the surgical gown, observe whether the blood flows, and record the flow distance.

[0137] 5. Tensile performance detection

[0138] The finished surgical gowns were prepared by the production methods of Examples 1-5 and 8. Referring to GB / T 3923.1-2013 Textiles - Tensile properties of fabrics - Part 1: Determination of breaking force and elongation at break, the tensile breaking strength was detected and the data were recorded.

[0139] Table 1 Performance test table

[0140]

[0141]

[0142] Combined with Table 1 of Examples 1-3, it can be seen that the finished surgical gowns prepared in this application have the effect of long-term antibacterial, and even after 50 washes, they still have a good barrier effect on microorganisms, and have good air permeability, the flowing distance of blood on the surface of the surgical gown is short, and at the same time, the surgical gown has high strength, so that the surgical gown has the advantages of long-term antibacterial, good air permeability and reusable.

[0143] Combined with Example 1 and Example 4 and combined with Table 1, it can be seen that the surgical gown prepared in Example 4 has a slightly better antibacterial effect than Example 1 after 50 washes, and the ability to prevent microorganisms from passing through in the wet state is better than that of Example 1, and the strength is slightly higher than that of Example 1; it shows that the aramid fiber and glass fiber modified by chitosan can utilize the positive charge carried by chitosan to promote the movement of antibacterial particles towards the antibacterial layer direction, so as to further improve the antibacterial time limit of the antibacterial layer on the surface of the surgical gown; and the chitosan on the surface of aramid fiber and glass fiber cooperates with the semi-permeable membrane-coated silver-silica gel particles and terpene resin in the antibacterial layer to further improve the layer structure stability of the surgical gown, so that the surgical gown has high strength and is not prone to layer peeling problems.

[0144] Combined with Example 4 and Examples 5-11 and combined with Table 1, it can be seen that in Example 5, the antibacterial particle raw material in the fiber layer is replaced with carbon fiber of the same mass as the chitosan-modified carbon fiber. Compared with Example 4, the initial antibacterial rate and the initial ability to prevent microorganisms from passing through in the wet state of the surgical gown prepared in Example 5 are worse than those of Example 4, and after the surgical gown is washed 50 times, the difference in antibacterial rate and the difference in the ability to prevent microorganisms from passing through in the wet state are both greater than the corresponding differences in Example 4, and the strength is lower than that of Example 4; it shows that the unmodified carbon fiber by chitosan is not easy to make the antibacterial particles move during the hot air drying process after EVA hot melting, thus affecting the antibacterial and virus prevention effects on the surface of the surgical gown.

[0145] Example 6: In the raw material of the antibacterial particles in the fiber layer, the EVA particles are replaced with an equal mass of sodium alginate aqueous solution. Compared with Example 4, after the surgical gown prepared in Example 6 is washed 50 times, the difference in antibacterial rate and the difference in moisture-resistant microbial permeability are both greater than the corresponding differences in Example 4. This shows that sodium alginate has hygroscopicity and will not melt under hot air conditions. Instead, it is easily affected by the chlorine disinfectant during multiple washing processes, which easily causes the antibacterial particles to detach from the surgical gown or the middle structure of the surgical gown to detach, thus easily affecting the long-term antibacterial property of the surgical gown.

[0146] Example 7: The silver ion antibacterial agent is not added to the raw material of the antibacterial particles in the fiber layer. Compared with Example 4, after the surgical gown prepared in Example 7 is washed 50 times, the difference in antibacterial rate and the difference in moisture-resistant microbial permeability are both greater than the corresponding differences in Example 4. This shows that the silver ion antibacterial agent can endow the surgical gown with long-term antibacterial performance.

[0147] Example 8: The terpene resin is not added to the raw material of the propolis liquid in the antibacterial layer. Compared with Example 4, after the surgical gown prepared in Example 8 is washed 50 times, the difference in antibacterial rate and the difference in moisture-resistant microbial permeability are both greater than the corresponding differences in Example 4, and the mechanical strength is worse than that of Example 4. This shows that the hot-melt propolis liquid and the terpene resin cooperate to have a good waterproof effect, which can prevent blood from adhering to the surface of the antibacterial non-woven fabric and affecting the adhesion stability of the semi-permeable membrane-coated silver-loaded silica gel particles. With the good heat resistance and aging resistance of the terpene resin, during the hot air drying process, it still protects the semi-permeable membrane-coated silver-loaded silica gel particles to be stably bonded to the surface of the antibacterial layer. At the same time, the terpene resin has good compatibility with EVA, thereby improving the bonding stability between the antibacterial layer and the fiber layer, ensuring that the antibacterial layer is not easily detached from the surface of the surgical gown during the cleaning and hot air drying processes of the surgical gown, thus ensuring that the surgical gown has the advantage of long-term antibacterial property.

[0148] Example 9: In the semi-permeable membrane-coated silver-loaded silica gel particles in the antibacterial layer, the silver-loaded silica gel particles are replaced with an equal mass of silver powder. Compared with Example 4, after the surgical gown prepared in Example 9 is spattered with blood, the flow distance will be longer than that of Example 4. This shows that without the silver powder loaded by the silica gel particles, it is not easy to adsorb blood, which easily causes the blood to flow on the surface of the surgical gown, thus easily posing a risk to the health of medical staff.

[0149] Example 10: In the semi-permeable membrane-coated silver-loaded silica gel particles in the antibacterial layer, the silk fibroin solution is replaced with an equal mass of chitosan solution. Compared with Example 4, after the surgical gown prepared in Example 10 is washed 50 times, the difference in antibacterial rate and the difference in moisture-resistant microbial permeability are both greater than the corresponding differences in Example 4. This shows that the silk fibroin solution contains negative charges, which easily attract the positively charged anions in the antibacterial particles, thus making the finished surgical gown have a long-term antibacterial effect.

[0150] In the preparation process of the antibacterial non-woven fabric in Example 11, after being soaked in the nano-silver dispersion, compared with Example 1, the difference in the antibacterial rate and the difference in the moisture-proof microbial permeability of the surgical gown prepared in Example 11 are both greater than the corresponding differences in Example 4 after 50 washes; it shows that the nano-silver soaking treatment is not easy to stably load nano-silver on the surface of the non-woven fabric. After multiple washing treatments, the nano-silver particles are easy to detach from the surface of the non-woven fabric, thus easily affecting the antibacterial effect of the finished surgical gown.

[0151] Combined with Example 1 and Comparative Examples 1-5 and Table 1, it can be seen that in the surgical gown of Comparative Example 1, the antibacterial layer is replaced with a non-woven fabric layer of the same quality, and the non-woven fabric layer is made of non-woven fabric. In the surgical gown of Comparative Example 2, the fiber layer is replaced with a non-woven fabric layer of the same quality, and the non-woven fabric layer is made of non-woven fabric. In the surgical gown of Comparative Example 3, the waterproof layer is replaced with a non-woven fabric layer of the same quality, and the non-woven fabric layer is made of non-woven fabric. Compared with Example 1, the antibacterial rate of the surgical gowns prepared in Comparative Examples 1, 2, and 3 is worse than that of Example 1. After 50 washes, the difference in the antibacterial rate and the difference in the moisture-proof microbial permeability are both greater than the corresponding differences in Example 1; it shows that the antibacterial layer, fiber layer, and waterproof layer cooperate with each other to initially kill and block the virus on the surgical gown by using the antibacterial layer on the outermost layer of the surgical gown; cooperate with the fiber network structure in the fiber layer to further kill and block the germs and prevent the virus from penetrating the surgical gown; and then cooperate with the waterproof function of the waterproof layer to block the penetration of germs carried by liquids such as blood and tissue fluid into the interior of the surgical gown, thereby protecting medical staff from being easily infected by the virus carried in the blood and tissue fluid.

[0152] In Comparative Example 4, antibacterial particles were not added to the raw material of the fiber layer, and in Comparative Example 5, propolis liquid and semi-permeable membrane-coated silver-loaded silica gel particles were not added to the antibacterial layer. Compared with Example 1, the difference in the antibacterial rate and the difference in the moisture-proof microbial permeability of the surgical gowns prepared in Comparative Examples 4 and 5 are both greater than the corresponding differences in Example 1 after 50 washes; it shows that antibacterial particles, propolis liquid, and semi-permeable membrane-coated silver-loaded silica gel particles can endow the surgical gown with a long-term antibacterial effect to protect medical staff from being easily cross-infected.

[0153] This specific embodiment is only an explanation of the present application, and it is not a limitation of the present application. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A long-acting bacteria-blocking surgical gown, characterized in that, The surgical gown sequentially includes a non-woven fabric layer, a waterproof layer, a fiber layer, and an antibacterial layer from inside to outside; The fiber layer contains the following raw materials in parts by weight: 20-40 parts of aramid fiber, 30-60 parts of glass fiber, 10-20 parts of antibacterial particles, and 10-15 parts of EVA particles; The antibacterial layer is prepared by sequentially spraying propolis solution and coating silver-loaded silica gel particles with a bonded semi-permeable membrane on antibacterial non-woven fabric; The silver-loaded silica gel particles coated with a semi-permeable membrane are prepared by the following method: Soak the silica gel particles in a nano-silver antibacterial solution and stir, then take out the silica gel particles to obtain silver-loaded silica gel particles; Weigh silk fibroin solution and chitosan solution according to a mass ratio of 1:0.1-0.3, mix and stir evenly to obtain a preliminary mixture; Weigh the preliminary mixture and glutaraldehyde according to a mass ratio of 100:2-7, mix and stir evenly to obtain a coating solution; spray the coating solution evenly on the surface of the silver-loaded silica gel particles, and after drying, the coating solution forms a semi-permeable membrane to obtain the finished product.

2. The long-acting bacteria-resistant surgical gown according to claim 1, wherein: The antibacterial particles are composed of chitosan-modified carbon fiber, EVA particles, and silver ion antibacterial agent with a mass ratio of 1:0.1-0.3:0.4-1.

3. The long-acting bacteria-blocking surgical gown according to claim 2, characterized in that, The chitosan-modified carbon fiber is prepared by modifying carbon fiber with chitosan solution.

4. The long-acting bacteria-blocking surgical gown according to claim 1, characterized in that, The propolis solution is composed of hot-melt propolis solution and terpene resin solution with a mass ratio of 1:0.2-0.

5.

5. The long-acting bacteria-resistant surgical gown according to claim 1, wherein The waterproof layer is a polytetrafluoroethylene membrane.

6. The long-acting bacteria-blocking surgical gown according to claim 1, characterized in that, The aramid fiber is chitosan-modified aramid fiber, and the glass fiber is chitosan-modified glass fiber.

7. A method for manufacturing a long-acting bacteria-blocking surgical gown according to any one of claims 1-6, characterized in that, It includes the following steps: S1. Take the non-woven fabric layer, evenly spray EVA molten liquid on the surface of the non-woven fabric layer, and then adhere the waterproof layer to the surface of the non-woven fabric layer; S2. Uniformly mix aramid fiber and glass fiber to obtain composite fiber; then melt EVA particles to obtain EVA molten liquid; evenly spray the EVA molten liquid on the surface of the composite fiber, and then evenly spray antibacterial particles to obtain a mixture; evenly coat the mixture on the surface of the waterproof layer away from the non-woven fabric layer, and after drying treatment, the mixture forms a fiber layer to obtain a composite layer; S3. Evenly spray EVA molten liquid on the surface of the fiber layer on the composite layer, and then adhere the antibacterial layer to the surface of the fiber layer, and after drying and cutting treatment, obtain the finished surgical gown.

8. The manufacturing method of a long-acting bacteria-blocking surgical gown according to claim 7, characterized in that, The antibacterial non-woven fabric in the antibacterial layer is prepared by soaking polyester non-woven fabric with scutellaria extract.

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