A reusable medical biohazard garment fabric and method of making the same

Abstract

The present application belongs to the field of biological protection. The present application provides a reusable medical biological protective clothing fabric and a preparation method thereof. The main body of the medical biological protective clothing fabric is a graphene composite fabric. The graphene composite fabric includes a surface layer antibacterial and antiviral protective fabric, an intermediate layer high-moisture-permeable and high-virus-barrier protective film, and an inner layer antibacterial and moisture-absorbing and quick-drying fabric. The upper surface and the lower surface of the intermediate layer high-moisture-permeable and high-virus-barrier protective film are both glued and bonded with the surface layer antibacterial and antiviral protective fabric and the inner layer antibacterial and moisture-absorbing and quick-drying fabric, respectively. The reusable medical biological protective clothing fabric is obtained by stretching, gluing, bonding, steam curing and winding the three layers of materials. The present application aims to solve the problem of resource waste caused by the fact that most medical protective clothing is disposable.

Description

Technical Field

[0001] This invention belongs to the field of biological protection, and in particular relates to a reusable medical biological protective clothing fabric and its preparation method. Background Technology

[0002] Traditional protective suits are made of a composite of PP non-woven fabric and PE film, and can only be used once. In reality, there are emergency situations where there is a shortage of protective suits. Staff in epidemic areas, such as gatekeepers, community managers, traffic managers, and volunteers, all wear disposable medical protective suits, resulting in huge consumption and enormous waste.

[0003] Therefore, there is an urgent need for a protective clothing fabric that can be repeatedly disinfected and reused, which can save a lot of protective clothing and ensure that frontline medical staff have enough. Summary of the Invention

[0004] This invention provides a reusable medical biological protective clothing fabric and its preparation method, which addresses the problem that most current medical protective clothing fabrics are disposable, resulting in resource waste.

[0005] The main technical solutions adopted in this invention include:

[0006] Firstly, the present invention provides a reusable medical biological protective clothing fabric, the main body of which is a graphene composite fabric; the graphene composite fabric includes an outer antibacterial and antiviral protective fabric, a middle layer of highly permeable and highly barrier virus protective film, and an inner layer of antibacterial, moisture-wicking, and quick-drying fabric; the upper and lower surfaces of the middle layer of highly permeable and highly barrier virus protective film are both coated with adhesive, and are respectively bonded to the outer antibacterial and antiviral protective fabric and the inner layer of antibacterial, moisture-wicking, and quick-drying fabric.

[0007] Furthermore, the surface antibacterial and antiviral protective fabric is a four-way stretch protective fabric or an elastic fabric; the four-way stretch protective fabric is woven from core-spun yarn and conductive fibers; the core-spun yarn includes graphene-containing nylon fibers and elastic fibers; the graphene-containing nylon fibers are obtained by melt-blending and spinning in-situ polymerized graphene masterbatch, nylon chips, and a first antibacterial and antiviral agent; the in-situ polymerized graphene masterbatch is obtained by adding carboxyl or amine-modified graphene oxide during the ring-opening polymerization of nylon 6 or the condensation reaction of nylon 66; the first antibacterial and antiviral agent is an inorganic antibacterial agent; the inorganic antibacterial agent is one or more of nano-silver, copper ion compounds, and zinc ion compounds. The elastic fabric is woven from graphene-containing DTY nylon fibers and the conductive fibers.

[0008] Furthermore, the intermediate high-permeability and high-barrier virus protective membrane is a PU microporous membrane with an asymmetric cavity structure; the PU microporous membrane has a cavity with a curved network structure running through the upper and lower surfaces in the middle, and a second antibacterial and antiviral agent is disposed inside the cavity.

[0009] Furthermore, the inner antibacterial, moisture-wicking, and quick-drying fabric is an elastic fabric woven from graphene nylon fibers, an antibacterial treated 20D elastic yarn fabric, or an elastic yarn fabric with a silver-plated surface.

[0010] Furthermore, the surface of the surface antibacterial and antiviral protective fabric is coated with a nanoscale superhydrophobic film.

[0011] Secondly, this invention provides a method for preparing a reusable medical biological protective clothing fabric. The preparation method includes: S1, preparing the surface antibacterial and antiviral protective fabric; S2, preparing the middle layer high-moisture permeability and high-barrier virus protective film; S3, preparing the inner layer antibacterial, moisture-wicking, and quick-drying fabric; S4, applying adhesive and tension to the middle layer high-moisture permeability and high-barrier virus protective film; applying tension to the surface antibacterial and antiviral protective fabric; applying tension to the inner layer antibacterial, moisture-wicking, and quick-drying fabric; S5, bonding the adhesive-coated and tensioned middle layer high-moisture permeability and high-barrier virus protective film with the tensioned surface antibacterial and antiviral protective fabric and the tensioned inner layer antibacterial, moisture-wicking, and quick-drying fabric respectively using pressure rollers to obtain a three-layer adhesive composite material; S6, curing, releasing tension, and winding the three-layer adhesive composite material to obtain the main body of the medical biological protective clothing fabric.

[0012] Further, the preparation of the surface antibacterial and antiviral protective fabric includes: S11, adding carboxyl or amine-modified graphene oxide to the ring-opening polymerization of nylon 6 or the condensation reaction of nylon 66 to obtain the in-situ polymerized graphene masterbatch; S12, using the in-situ polymerized graphene masterbatch, nylon chips, and a first antibacterial and antiviral agent for melt blending and spinning to obtain the graphene-containing nylon fiber, wherein the first antibacterial and antiviral agent is an inorganic antibacterial agent; the inorganic antibacterial agent is one or more of nano-silver, copper ion compounds, and zinc ion compounds; S13, using the graphene-containing nylon fiber and elastic fiber to weave a core-spun yarn; S14, using the core-spun yarn and conductive fiber to weave a four-way stretch protective fabric, or using graphene-containing DTY nylon fiber and conductive fiber for warp weaving to obtain an elastic fabric; S15, using the four-way stretch protective fabric or elastic fabric to obtain the surface antibacterial and antiviral protective fabric.

[0013] Further, the preparation of the intermediate layer high moisture permeability and high barrier virus protective membrane includes: S21, treating the asymmetric cavity structure of the PU microporous membrane to obtain a PU microporous membrane with a curved network structure of cavities penetrating the upper and lower surfaces; S22, treating the PU microporous membrane with a curved network structure of cavities penetrating the upper and lower surfaces using a second antibacterial and antiviral agent to obtain the intermediate layer high moisture permeability and high barrier virus protective membrane; the second antibacterial and antiviral agent is a porous antibacterial and antiviral agent.

[0014] Furthermore, the preparation of the inner antibacterial, moisture-wicking and quick-drying fabric includes: using an elastic fabric woven from graphene nylon fibers, an antibacterial treated 20D elastic yarn fabric, or an elastic yarn fabric with a silver-plated surface to obtain the inner antibacterial, moisture-wicking and quick-drying fabric.

[0015] Furthermore, the method for preparing the surface of the surface antibacterial and antiviral protective fabric coated with a nanoscale superhydrophobic film includes: etching the fiber surface of the graphene nylon fabric with electron beam irradiation to obtain a fiber surface with a rough structure at the micro-nano scale; and treating the fiber surface with the rough structure at the micro-nano scale with plasma in a fluorinated silane atmosphere to obtain the surface of the surface antibacterial and antiviral protective fabric coated with a nanoscale superhydrophobic film.

[0016] The beneficial effect of this invention is that, compared with the prior art, it provides a reusable medical biological protective clothing fabric and its preparation method.

[0017] This invention provides a reusable medical protective clothing fabric. The main body of the fabric is prepared according to the exhaust-type sterilization method under pressure steam sterilization in Part 2 of WS 310.2-2016, "Hospital Disinfection Supply Center: Cleaning, Disinfection and Sterilization Technical Operation Specifications," at 121℃ for 30 minutes, with a pressure range of 102.8 kPa to 122.9 kPa. After being reused 10 times, its performance is tested, showing a water repellency ≥20 kPa, water repellency ≥3, filtration efficiency ≥90%, and moisture permeability ≥6500 g / m². 2 • 24h, surface charge density ≤6.0μC / m 2 The standard of antibacterial performance (Staphylococcus aureus, Candida albicans, Escherichia coli, Klebsiella pneumoniae) ≥90% is met by this application, which can still meet the standard even when reused, thus achieving the purpose of reuse.

[0018] The method for preparing reusable medical protective clothing fabric provided by the present invention involves a one-time forming process of stretching, gluing, bonding, curing, and rolling of the three-layer material, which is different from conventional composite materials that require rolling and curing. The resulting fabric can be repeatedly disinfected and used at least 10 times. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained based on these drawings without creative effort.

[0020] Figure 1 The diagram shows a flow chart of a method for preparing a reusable medical biological protective clothing fabric according to an embodiment of the present invention. Detailed Implementation

[0021] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Unless otherwise specified, the experimental methods used in the following examples are conventional methods.

[0023] Unless otherwise stated, all materials and reagents used in the following examples are commercially available.

[0024] This invention provides a method for preparing reusable medical biological protective clothing fabric, the process diagram of which is shown below. Figure 1 .

[0025] Example 1

[0026] (1) In-situ polymerized graphene nylon 6 chips, 300nm silver nanoparticles, and nylon 6 chips were melt-spun to obtain 20D / 12F antibacterial graphene nylon fibers, wherein the weight ratio of silver nanoparticles was 1% and the weight ratio of graphene was 1%. The 20D / 12F antibacterial graphene nylon fibers were then combined with spandex to form a core-spun yarn, which was woven into a four-way elastic fabric as a surface antibacterial and antiviral protective fabric. The fabric has a weight of 35g / m². 2 The warp elastic recovery rate is 12%, and the weft elastic recovery rate is 15%.

[0027] (2) A coating solution was prepared by mixing 100 parts polyurethane, 80 parts DMF, 30 parts nano-calcium carbonate, 15 parts water-soluble microporous silver nanoparticles coated with a water-soluble substance, and 3 parts water-repellent agent. The coating solution was then coated, solidified, washed, and dried on release paper. Nano-silver polyurethane adhesive droplets were then atomized and sprayed onto the surface to form dotted nano-silver antibacterial particles. Finally, the particles were peeled off and rolled up to obtain a high-moisture-permeable and high-barrier virus protective film with a PU microporous membrane structure as the intermediate layer. The protective film has a basis weight of 18 g / m². 2 The warp elastic recovery rate is 15%, and the weft elastic recovery rate is 15%.

[0028] (3) Using a cross-shaped spinneret, nylon slices containing graphene are prepared to obtain graphene fibers with a cross-shaped cross section, wherein the graphene weight ratio is 1%. The graphene fibers with the cross-shaped cross section are then processed using a four-way stretch weaving process to obtain a single-sided elastic knitted fabric, which serves as the inner layer of the antibacterial, moisture-wicking, and quick-drying fabric. The fabric has a weight of 20 g / m². 2 The radial elastic recovery rate is 15%, and the lateral elastic recovery rate is 15%.

[0029] (4) Clamping devices are installed at opposite ends of the laminating machine, and the middle layer of high-permeability, high-barrier virus-protective film with a PU microporous membrane structure is stretched. Under tension, adhesive is applied to the upper and lower surfaces of the middle layer of high-permeability, high-barrier virus-protective film by front and rear glue rollers; the surface antibacterial and antiviral protective fabric and the inner antibacterial, moisture-wicking, and quick-drying fabric are stretched under the clamping devices at both ends, and then the surface antibacterial and antiviral protective fabric, the middle layer of high-permeability, high-barrier virus-protective film, and the inner layer of antibacterial, moisture-wicking, and quick-drying fabric are pressed together by adhesive rollers to obtain a three-layer adhesive composite material. The stretch ratio at opposite ends of the three-layer adhesive composite material is 13%, and the stretch ratio in the forward direction of the laminating process is 11%.

[0030] (5) The composite three-layer adhesive composite material is placed in a hot steam curing box under tension for curing treatment. The curing temperature is 80℃, the humidity is 80%, and the time is 120min. Then the tension is released and the material is rolled up to obtain the main body of the medical biological protective clothing fabric.

[0031] The main body of the medical biological protective clothing fabric was sterilized at 121℃ for 30 minutes under a pressure range of 102.8kPa to 122.9kPa. After being reused 10 times, its performance is shown in Table 1.

[0032] Test results showed that after 10 rounds of high-temperature sterilization, the protective clothing fabric still maintained good impermeability, with a hydrostatic pressure of 5000 mmH2O and a moisture permeability of 8000 g / m². 2 It has a 24-hour operating time and also possesses good antibacterial properties, moisture resistance, and filtration efficiency, and can be reused multiple times.

[0033] Table 1. Performance test results of the main body of the medical biological protective clothing fabric prepared in Example 1 after 10 reuses.

[0034]

[0035]

[0036] Example 2

[0037] (1) In-situ polymerized graphene nylon 6 chips, 500nm silver nanoparticles, and nylon 6 chips were melt-spun to obtain 20D / 12F antibacterial graphene nylon fibers, wherein the weight ratio of silver nanoparticles was 1.5% and the weight ratio of graphene was 1.5%. The 20D / 12F antibacterial graphene nylon fibers were then combined with T800 elastic fibers to form a core-spun yarn, which was woven into a four-way elastic fabric as a surface antibacterial and antiviral protective fabric. The fabric has a weight of 38g / m². 2 The warp elastic recovery rate is 10%, and the weft elastic recovery rate is 13%.

[0038] (2) A coating solution was prepared by mixing 100 parts polyurethane, 80 parts DMF, 30 parts nano-calcium carbonate, 18 parts water-soluble substance-coated microporous nano-silver, and 3 parts water-repellent agent. The coating solution was then coated onto release paper, solidified, washed with water, and dried. Nano-silver polyurethane adhesive droplets were then atomized and sprayed onto the surface to form dotted nano-silver antibacterial particles. Finally, the particles were peeled off and rolled up to obtain a high-moisture-permeable and high-barrier virus protective film with a PU microporous membrane structure as the intermediate layer. The weight of this protective film was 19 g / m². 2 The elastic recovery rate is 13% in the warp direction and 13% in the weft direction.

[0039] (3) 20D elastic nylon yarn was impregnated in a 5% concentration of silver ion antibacterial finishing agent for 10 minutes, then dried at 100℃ for 10 minutes and baked at 150℃ for 3 minutes to obtain antibacterial elastic yarn, which was used as the inner layer antibacterial moisture-wicking and quick-drying fabric. The fabric has a weight of 16 g / m². 2 The radial elastic recovery rate is 13%, and the latitudinal elastic recovery rate is 15%.

[0040] (4) Clamping devices are installed at opposite ends of the laminating machine, and the middle layer of high-permeability, high-barrier virus-protective film with a PU microporous membrane structure is stretched. Under tension, adhesive is applied to the upper and lower surfaces of the middle layer of high-permeability, high-barrier virus-protective film by front and rear glue rollers; the surface antibacterial and antiviral protective fabric and the inner antibacterial moisture-wicking and quick-drying fabric are stretched under the clamping devices at both ends, and then the surface antibacterial and antiviral protective fabric, the middle layer of high-permeability, high-barrier virus-protective film, and the inner layer of antibacterial moisture-wicking and quick-drying fabric are pressed together by adhesive rollers to obtain a three-layer adhesive composite material. The stretch ratio at opposite ends of the three-layer adhesive composite material is 11%, and the stretch ratio in the forward direction of the laminating process is 10%.

[0041] (5) The composite three-layer adhesive composite material is placed in a hot steam curing box under tension for curing treatment. The curing temperature is 90℃, the humidity is 85%, and the time is 100min. Then the tension is released and the material is rolled up to obtain the main body of the medical biological protective clothing fabric.

[0042] The main body of the medical biological protective clothing fabric was sterilized at 121℃ for 30 minutes under a pressure range of 102.8kPa to 122.9kPa. After being reused 10 times, its performance is shown in Table 2.

[0043] Test results showed that after 10 rounds of high-temperature sterilization, the protective clothing fabric still maintained good impermeability, with a hydrostatic pressure of 4500 mmH2O and a moisture permeability of 7500 g / m². 2 It has a 24-hour operating time and also possesses good antibacterial properties, moisture resistance, and filtration efficiency, and can be reused multiple times.

[0044] Table 2. Performance test results of the main body of the medical biological protective clothing fabric prepared in Example 2 after 10 reuses.

[0045]

[0046] Example 3

[0047] (1) In-situ polymerized graphene nylon 6 chips, 200nm zinc nanoparticles, and nylon 6 chips were blended and melt-spun to obtain 40D / 34F antibacterial graphene nylon fiber (DTY), wherein the weight ratio of zinc nanoparticles was 2% and the weight ratio of graphene was 2%. The 40D / 34F antibacterial graphene nylon fiber (DTY) was spun and woven to obtain a weft-knitted elastic fabric, which was used as a surface antibacterial and antiviral protective fabric. The fabric had a weight of 40g / m². 2 The warp elastic recovery rate is 8%, and the weft elastic recovery rate is 10%.

[0048] (2) A coating solution was prepared by mixing 100 parts polyurethane, 80 parts DMF, 30 parts nano-calcium carbonate, 18 parts water-soluble microporous zinc nanoparticles coated with a water-soluble substance, and 3 parts water-repellent agent. The coating solution was then applied to release paper, solidified, washed with water, and dried. Nano-zinc polyurethane adhesive droplets were then atomized and sprayed onto the surface to form dotted nano-zinc antibacterial particles. Finally, the particles were peeled off and rolled up to obtain a high-moisture-permeable and high-barrier virus protective film with a PU microporous membrane structure as the intermediate layer. The protective film has a basis weight of 20 g / m². 2 The warp elastic recovery rate is 15%, and the weft elastic recovery rate is 15%.

[0049] (3) High-purity silver is magnetron sputtered onto the surface of 20D elastic nylon yarn to form a silver-plated elastic nylon yarn, which serves as the inner layer of antibacterial, moisture-wicking, and quick-drying fabric. The fabric has a weight of 18 g / m². 2 The radial elastic recovery rate is 13%, and the latitudinal elastic recovery rate is 15%.

[0050] (4) Clamping devices are installed at opposite ends of the laminating machine, and the middle layer of high-permeability, high-barrier virus-protective film with a PU microporous membrane structure is stretched. Under tension, adhesive is applied to the upper and lower surfaces of the middle layer of high-permeability, high-barrier virus-protective film by front and rear glue rollers; the surface antibacterial and antiviral protective fabric and the inner antibacterial, moisture-wicking, and quick-drying fabric are stretched under the clamping devices at both ends, and then the surface antibacterial and antiviral protective fabric, the middle layer of high-permeability, high-barrier virus-protective film, and the inner layer of antibacterial, moisture-wicking, and quick-drying fabric are pressed together by adhesive rollers to obtain a three-layer adhesive composite material. The stretch ratio at opposite ends of the three-layer adhesive composite material is 10%, and the stretch ratio in the forward direction of the laminating process is 8%.

[0051] (5) The composite three-layer adhesive composite material is placed in a hot steam curing box under tension for curing treatment. The curing temperature is 95℃, the humidity is 90%, and the time is 80min. Then the tension is released and the material is rolled up to obtain the main body of the medical biological protective clothing fabric.

[0052] The main body of the medical biological protective clothing fabric was sterilized at 121℃ for 30 minutes under a pressure range of 102.8kPa to 122.9kPa. After being reused 10 times, its performance is shown in Table 3.

[0053] Test results showed that after 10 rounds of high-temperature sterilization, the protective clothing fabric still maintained good impermeability, with a hydrostatic pressure of 4000 mmH2O and a moisture permeability of 7000 g / m². 2 It has a 24-hour operating time and also possesses good antibacterial properties, moisture resistance, and filtration efficiency, and can be reused multiple times.

[0054] Table 3. Performance test results of the main body of the medical biological protective clothing fabric prepared in Example 3 after 10 reuses.

[0055]

[0056]

[0057] As can be seen from the above embodiments, the reusable medical protective clothing fabric prepared by the present invention has a water repellency level of ≥3, a filtration efficiency of ≥90%, a moisture permeability of ≥6500g / m224h, a surface charge density of ≤6.0μC / m2, and an antibacterial performance (Staphylococcus aureus, Candida albicans, Escherichia coli, Klebsiella pneumoniae) of ≥90%. It has antibacterial and reusable effects.

Claims

1. A reusable medical biocontainment garment fabric, characterized in that, The medical biological protection clothing fabric body is a graphene composite fabric; the graphene composite fabric comprises a surface layer antibacterial and antiviral protective fabric, an intermediate layer high-moisture-permeable and high-virus-barrier protective film, and an inner layer antibacterial and moisture-absorbing and quick-drying fabric; The upper surface and the lower surface of the intermediate layer high-moisture-permeable and high-virus-barrier protective film are both glued and bonded with the surface layer antibacterial and antiviral protective fabric and the inner layer antibacterial and moisture-absorbing and quick-drying fabric respectively; The surface layer antibacterial and antiviral protective fabric is a four-way stretch protective fabric or an elastic fabric; The four-way stretch protective fabric is woven from core-spun yarn and conductive fiber; the core-spun yarn comprises nylon fiber containing graphene and elastic fiber; the nylon fiber containing graphene is obtained by melt blending and spinning of in-situ polymerized graphene masterbatch, nylon chip and first antibacterial and antiviral agent; the in-situ polymerized graphene masterbatch is obtained by adding carboxyl or amine group modified graphene oxide in nylon 6 ring-opening polymerization or nylon 66 condensation polymerization; the first antibacterial and antiviral agent is an inorganic antibacterial agent; the inorganic antibacterial agent is one or more of nano-silver, copper ion compound and zinc ion compound; The elastic fabric is woven from DTY nylon fiber containing graphene and the conductive fiber; The intermediate layer high-moisture-permeable and high-virus-barrier protective film is a PU microporous film with an asymmetric cavity structure; The PU microporous film has a cavity with a curved network structure penetrating through the upper and lower surfaces, and the cavity is provided with a second antibacterial and antiviral agent inside; The inner layer antibacterial and moisture-absorbing and quick-drying fabric is an elastic fabric woven from graphene nylon fiber, a 20D elastic floating yarn fabric treated with antibacterial agent, or a silver-plated elastic floating yarn fabric.

2. The reusable medical biocontainment garment fabric of claim 1, wherein, The surface of the surface layer antibacterial and antiviral protective fabric is covered with a nanoscale super-hydrophobic film.

3. A method of making a reusable medical biocontainment garment fabric, characterized by, The preparation method applied to the reusable medical biological protection clothing fabric of any one of claims 1-2 comprises: S1, preparing the surface layer antibacterial and antiviral protective fabric; S2, preparing the intermediate layer high-moisture-permeable and high-virus-barrier protective film; S3, preparing the inner layer antibacterial and moisture-absorbing and quick-drying fabric; S4, gluing and applying tension to the intermediate layer high-moisture-permeable and high-virus-barrier protective film, applying tension to the surface layer antibacterial and antiviral protective fabric, and applying tension to the inner layer antibacterial and moisture-absorbing and quick-drying fabric; S5, bonding the glued and tension-applied intermediate layer high-moisture-permeable and high-virus-barrier protective film with the surface layer antibacterial and antiviral protective fabric and the inner layer antibacterial and moisture-absorbing and quick-drying fabric respectively by pressure roller to obtain a three-layer bonded composite material; S6, curing, releasing tension and winding the three-layer bonded composite material to obtain the medical biological protection clothing fabric body.

4. The method of making a reusable medical biocontainment suit fabric according to claim 3, wherein, The preparation of the surface layer antibacterial and antiviral protective fabric comprises: S11, adding carboxyl or amine group modified graphene oxide in nylon 6 ring-opening polymerization or nylon 66 condensation polymerization to obtain the in-situ polymerized graphene masterbatch; S12, melt blending and spinning of the graphene master batch, nylon chip and the first antibacterial and antiviral agent to obtain the graphene-containing nylon fiber, wherein the first antibacterial and antiviral agent is an inorganic antibacterial agent; the inorganic antibacterial agent is one or more of nano-silver, copper ion compound and zinc ion compound; S13, using the graphene-containing nylon fiber and elastic fiber to weave core-spun yarn; S14, using the core-spun yarn and conductive fiber to weave four-way stretch protective fabric, or using the graphene-containing DTY nylon fiber and conductive fiber to weave elastic fabric; S15, using the four-way stretch protective fabric or the elastic fabric to obtain the surface layer antibacterial and antiviral protective fabric.

5. The method of making a reusable medical biocontainment suit fabric according to claim 3, wherein, The preparation of the intermediate layer high-moisture-permeable and high-virus-barrier protective film includes: S21, treating the PU microporous film with an asymmetric cavity structure to obtain a PU microporous film with a curved network structure of cavities penetrating through the upper and lower surfaces; S22, treating the PU microporous film with a curved network structure of cavities penetrating through the upper and lower surfaces with a second antibacterial and antiviral agent to obtain the intermediate layer high-moisture-permeable and high-virus-barrier protective film; the second antibacterial and antiviral agent is a multi-aperture antibacterial and antiviral agent.

6. The method of making a reusable medical biocontainment suit fabric according to claim 3, wherein, The preparation of the inner layer antibacterial and moisture-absorbing quick-drying fabric includes: Using the elastic fabric woven from graphene nylon fiber, the 20D elastic floating yarn fabric treated with antibacterial agent, or the surface silver-plated elastic floating yarn fabric to obtain the inner layer antibacterial and moisture-absorbing quick-drying fabric.

7. The method of making a reusable medical biocontainment suit fabric according to claim 3, wherein, The preparation method of the surface layer antibacterial and antiviral protective fabric with a nanoscale super-hydrophobic film on the surface includes: Using electron beam irradiation to etch the fiber surface of the graphene nylon fabric to obtain a fiber surface with a micro-nano scale rough structure; In a fluorine-containing silane atmosphere, using plasma to treat the fiber surface with a micro-nano scale rough structure to obtain the surface layer antibacterial and antiviral protective fabric with a nanoscale super-hydrophobic film on the surface.

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