A kind of adhesive strip for protective clothing

Abstract

The present invention belongs to the field of composite materials, and particularly relates to a hot melt adhesive strip for protective clothing. The raw materials of the present invention are polyacrylonitrile, FeSO4 and polyurethane. The preparation method of the present invention is simple, has a short process and high efficiency. The prepared Fe3C carbon nanofiber multilayer film metamaterial has excellent electrical conductivity, gas barrier property and stretchability, and can be used as a hot melt adhesive strip material for protective clothing. The static electricity generated by the friction between the protective clothing and other substances will be conducted along the hot melt adhesive strip to the ground, so as to achieve the antistatic effect. Compared with the situation of using antistatic fabric throughout the protective clothing, the hot melt adhesive strip for protective clothing prepared by the present invention has low cost and good effect. At the same time, the self-property of the multilayer film metamaterial makes the fiber diameter below 0.45 μm, meeting the AAMI level 4 protection requirement and achieving a good gas barrier effect.

Description

Technical Field

[0001] The invention belongs to the field of composite materials, and in particular relates to a rubber strip for protective clothing. Background Art

[0002] In recent years, the demand for medical protective clothing has surged. On the medical epidemic prevention protective clothing currently on the market for nucleic acid testing and other work, blue glue strips are often found on the cuffs, collars and other seams of protective clothing. The product requirements for glue strips on protective clothing are also increasing. The fiber diameter of the prepared glue strips must be smaller than the particle size of SARS and the new coronavirus to meet the AAMI4 level protection requirements and achieve a better gas barrier effect. In medical environments and other workplaces, the BPE materials commonly used in protective clothing are prone to friction with other materials when worn to generate static electricity. Static electricity may affect the placement of work items. In the case of electronic equipment assisting work, it is more likely to interfere with the operation of electronic equipment, thereby affecting work. However, in the process of preparing corresponding finished clothing products of textiles, non-woven fabrics and their derivative materials, seams are inevitably present between the fabrics. The existing glue strips on protective clothing and their preparation methods are not perfect. In addition, the research on glue strips on protective clothing focuses on achieving the functions of waterproofness, thermal conductivity, and anti-aging, but lacks antistatic function.

[0003] Patent CN113388364A discloses a method for preparing a laminated adhesive strip for waterproof and breathable protective clothing. The main process includes mixing the raw materials according to the weight ratio, heating and mixing, adding the mixed materials to a casting machine to form a film, rolling up the film after forming the film, bonding and fixing the laminated adhesive strip to the protective clothing, and finally testing the sealing effect. The product made by this method has good waterproof and breathable and anti-aging effects, but lacks anti-static effect, which is inconvenient during work.

[0004] Patent CN114601211A discloses an antistatic protective clothing with an openable and closable ventilation structure, which mainly includes a permanent magnet inside the clothing and an electromagnet connected to achieve an antistatic function, which improves the sealing strength to a certain extent and can also prevent the internal temperature of the protective clothing from being too high. However, its preparation process is complicated and has high requirements on raw materials. Compared with the preparation of the pressed rubber strip, while having certain antistatic properties, the area of ​​the special non-woven fabric required is also larger, which is not conducive to large-scale application in the market from the perspective of disposable use.

[0005] Patent CN212065807U discloses a protective clothing cuff structure, the cuff of which has a sewn inner cavity, a rubber band, a Velcro flannel and a Velcro hook. Although it does have a sealing effect, the effect of the Velcro cannot be guaranteed and is unevenly distributed, and its adhesion effect is difficult to meet the needs of long-term wearing.

[0006] Patent CN112273755A discloses a protective clothing with anti-static and flame-retardant functions. It has excellent anti-static performance. However, the anti-static layer and the outer layer of the protective clothing are two separate layers of fabric, which invisibly increases the discomfort of the wearer, leads to poor stretchability, makes it difficult to work and move, and increases the risk of non-enclosed environment. Summary of the invention

[0007] In order to solve the above-mentioned existing technical problems, the present invention provides a protective clothing pressure-bonding strip, wherein the protective clothing pressure-bonding strip is composed of several layers of Fe 3 C carbon nanofiber membrane is obtained by hot pressing;

[0008] The Fe 3 The carbon nanofiber membrane is obtained by air-jet spinning and carbonization of a spinning solution, wherein the solute of the spinning solution includes PAN, FeSO 4 and PU.

[0009] The present invention uses air-jet spinning, high-temperature carbonization technology and vacuum hot pressing technology, and the diameter of the finally prepared glue strip fiber can be less than 0.45 μm (i.e., smaller than the particle size of SARS and novel coronavirus), which can meet the AAMI 4 level protection requirements and achieve a good gas barrier effect. At the same time, the position of the glue strips on the protective clothing is distributed vertically and horizontally along the limbs, and a glue strip in the middle of the body extends from the top of the head to the soles of the feet and connects to the ground. Because the present invention is conductive, the static electricity generated by the protective clothing during work can be passed to the ground along the glue strips, thereby achieving the anti-static effect of the protective clothing.

[0010] Preferably, the spinning solution is PAN, FeSO 4 It is obtained by adding an organic solvent to PU and heating it to 50-70°C.

[0011] Furthermore, the organic solvent is N,N-dimethylformamide (DMF).

[0012] Preferably, the concentration of the solute in the spinning solution is 10-15 wt %.

[0013] Preferably, the weight average molecular weight of PAN is 80,000-120,000.

[0014] Preferably, the Fe 3 The thickness of the C nanofiber membrane is 5-8 μm.

[0015] Preferably, in the spinning solution, PAN, FeSO 4 The mass ratio of PU is 7:1-2:1-2.

[0016] PAN / FeSO 4The Fe / PU nanofiber membrane was pre-oxidized at 160-200°C for 120-180 min before carbonization, and the carbonization time was 3-5 h to obtain Fe 3 C Carbon nanofiber monolayer film.

[0017] Preferably, the protective clothing adhesive strip is composed of 75-100 layers of Fe 3 C carbon nanofiber membrane is obtained by hot pressing.

[0018] Preferably, the carbonization temperature is 800-1000°C.

[0019] Furthermore, the carbonization is carried out under a protective atmosphere.

[0020] Preferably, the hot pressing is vacuum hot pressing, and the time is 1-5 hours.

[0021] Preferably, the conditions for the air-jet spinning are: the liquid feed rate is 4-6 mL·h -1 , the air pressure is set to 0.05-0.15 MPa, the distance from the spinning nozzle to the receiver is 30-40 cm, the ambient temperature is 20-30°C, and the ambient humidity is 50-70%.

[0022] The method for preparing the protective clothing adhesive strip comprises the following steps:

[0023] (1) The raw materials polyacrylonitrile (PAN) and FeSO 4 The powder and polyurethane (PU) are dissolved in N,N-dimethylformamide (DMF) according to the weight ratio;

[0024] (2) The mixed raw materials were sealed in a reactor and heated to 60°C, stirred continuously for 24 hours, then ultrasonicated for 6 hours, and stirred for another 18 hours to obtain a uniform and stable PAN / FeSO 4 / PU mixed air-jet spinning solution;

[0025] (3) Setting spinning parameters PAN / FeSO 4 The liquid feed rate of / PU mixed air-jet spinning solution was 5.5mL / h. PAN / FeSO 4 / PU nanofiber membrane;

[0026] (4) PAN / FeSO 4 The Fe / PU nanofiber membrane was carbonized in a high temperature carbonization furnace to obtain 3 C carbon nanofiber monolayer film;

[0027] (5) Fe 3 A certain number of C carbon nanofiber single-layer membranes are alternately stacked, and the stacked Fe 3C carbon nanofiber monolayer film is pressed into Fe 3 C Carbon nanofiber multilayer film metamaterial;

[0028] (6) Fe 3 The C carbon nanofiber multilayer film is rolled up, and then trimmed and formed to obtain the protective clothing press strip.

[0029] Preferably, in the step (2), the mixed raw materials are first sealed in a reactor and heated to 60°C, continuously mechanically stirred for 24 hours, then moved into an ultrasonic stirring reactor and ultrasonically stirred for 6 hours, and then moved back to a sealed reactor and mechanically stirred for 18 hours, finally obtaining a uniform and stable PAN / FeSO 4 / PU mixed air-jet spinning solution.

[0030] Preferably, in step (6), the rolled strips are cut according to size to obtain finished glue strips, each of which is 100-150 m long / roll and 20-30 mm wide.

[0031] The technical solution of the present invention has the following advantages over the prior art:

[0032] (1) The protective clothing of the present invention has excellent sealing performance as a whole, so that the protective clothing can be more effectively isolated from the inside and outside, and further protect the life safety of doctors and patients. In today's world where the demand is so great, it has a wide range of applicability and practicality and can be quickly applied and put on the market.

[0033] (2) The rubber strips on the protective clothing in the present invention also have excellent conductive properties, which can eliminate static electricity to a certain extent. It can not only largely avoid the impact of static electricity generated by the friction of protective clothing on medical equipment when medical personnel are working, but also does not affect the sealing performance of the protective clothing.

[0034] (3) The rubber strips on the protective clothing of the present invention also have good tensile properties, so that medical staff will not feel awkward when working, and the antistatic and airtight properties of the protective clothing will not be affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The present invention is a schematic diagram of the process flow for preparing the pressed glue strip for protective clothing with strong conductive airtightness.

[0036] Figure 2 The Fe prepared by the present invention for use on the adhesive strip of protective clothing 3 C Longitudinal section structure of carbon nanofiber membrane multilayer metamaterial.

[0037] Explanation of the reference numerals: 101 - raw material, 102 - heating and stirring chamber, 103 - air-jet spinning device, 104 - high-temperature carbonization chamber, 105 - carbon ash tank, 106 - stacking tank, 107 - vacuum hot press, 108 - winding drum, 109 - second roller, 110 - dividing chamber. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0039] If not emphasized below, polyacrylonitrile (PAN) was purchased from Shanghai Junran Plastic Co., Ltd. with a weight average molecular weight of 100,000; FeSO4 powder was purchased from Hunan Yide Chemical Co., Ltd.; polyurethane (PU) was purchased from Anhui Anda Huatai New Materials Co., Ltd.; NN dimethylformamide (DMF) was purchased from Shandong Qilin Chemical Co., Ltd.

[0040] Example 1

[0041] This embodiment provides a protective clothing laminating strip with strong conductivity and air tightness, and the specific steps are as follows:

[0042] (1) First, polyacrylonitrile (PAN), FeSO 4 The powder and polyurethane (PU) were dissolved in NN dimethylformamide (DMF) to form an air-jet spinning solution. The mass fraction of the raw material PU was 20%, and FeSO 4 The mass fraction of is 10%, the mass fraction of PAN is 70%, the dissolution temperature is 60°C, and the sealed stirring and dissolution is carried out in the heating stirring chamber 102. The stirring time is 48 hours, the weight average molecular weight of PAN is 100000, and the spinning solution concentration is 12wt%.

[0043] (2) The obtained spinning solution is passed through an air-jet spinning device 103 to obtain a nanofiber membrane. The air-jet spinning parameters are: liquid feed volume 5 mLh-1, air pressure set to 0.10 MPa, distance from the spinning nozzle to the receiver is 35 cm, ambient temperature is 25°C, and ambient humidity is 60%.

[0044] (3) The nanofiber membrane was pre-oxidized at 180°C for 150 min, and then carbonized in a high-temperature carbonization chamber 104 for 4 hours at a carbonization temperature of 800°C to obtain Fe 3 C carbon nanofiber single layer membrane, thickness is 5 μm.

[0045] (4) Fe 3The C carbon nanofiber single-layer film is placed in the stacking groove 106 and stacked neatly, with 75 layers stacked. It is hot-pressed by a vacuum hot press machine 107 at a temperature of 1000°C and a pressure of 50 MPa for 5 hours under the heat preservation and pressure holding conditions. After the hot pressing is completed, it is slowly cooled to room temperature, the sample is taken out of the mold, and naturally quenched for 20 minutes. Finally, 75 layers of single-layer film are hot-pressed to form Fe 3 C Carbon nanofiber film multilayer metamaterial.

[0046] (5) Fe 3 The C carbon nanofiber membrane multilayer film is rolled up by the winding drum 108, and then rolled up again by the second roller 109. After completion, it passes through the cutting chamber 110 and is cut according to size, with a length of 100-150m / roll and a width of 20-30mm to obtain a glue strip a.

[0047] Example 1 normally shows that the protective clothing pressed rubber strips produced by the production method provided by the present invention have remarkable and excellent effects in anti-static performance, tensile strength, air permeability and other aspects, and the production process is simple, which is in line with the original intention of the present invention and is suitable for actual needs in many aspects.

[0048] Example 2

[0049] (1) First, polyacrylonitrile (PAN), FeSO 4 The powder and polyurethane (PU) were dissolved in NN dimethylformamide (DMF) to form an air-jet spinning solution. The mass fraction of the raw material PU was 10%, and FeSO 4 The mass fraction of is 20%, the mass fraction of PAN is 70%, the dissolution temperature is 60°C, and the sealed stirring and dissolution is carried out in the heating stirring chamber 102. The stirring time is 48 hours, the weight average molecular weight of PAN is 100000, and the spinning solution concentration is 12wt%.

[0050] (2) The obtained spinning solution was passed through the air-jet spinning device 103 to obtain a nanofiber membrane. The air-jet spinning parameters were: liquid feed volume 5 mL / h -1 , the air pressure was set to 0.10 MPa, the distance from the spinning nozzle to the receiver was 35 cm, the ambient temperature was 25°C, and the ambient humidity was 60%.

[0051] (3) The nanofiber membrane was pre-oxidized at 180°C for 150 min, and then carbonized in a high-temperature carbonization chamber 104 for 4 hours at a carbonization temperature of 800°C to obtain Fe 3 C carbon nanofiber single layer membrane, thickness is 5 μm.

[0052] (4) Fe 3The C carbon nanofiber single-layer film is placed in the stacking groove 106 and stacked neatly, with 75 layers stacked. It is hot-pressed by a vacuum hot press machine 107 at a temperature of 1000°C and a pressure of 50 MPa for 5 hours under the heat preservation and pressure holding conditions. After the hot pressing is completed, it is slowly cooled to room temperature, the sample is taken out of the mold, and naturally quenched for 20 minutes. Finally, 75 layers of single-layer film are hot-pressed to form Fe 3 C Carbon nanofiber film multilayer metamaterial.

[0053] (5) Fe 3 The C carbon nanofiber membrane multilayer film is rolled up by the winding drum 108, and then rolled up again by the second roller 109. After completion, it passes through the cutting chamber 110 and is cut according to size, with a length of 100-150m / roll and a width of 20-30mm to obtain the glue strip b.

[0054] Example 2 is different from Example 1. The protective clothing pressed rubber strip produced by the production method provided by the present invention has relatively excellent antistatic performance, tensile strength, air permeability and other aspects, and the production process is simple, which is in line with the original intention of the present invention and is suitable for practical needs in many aspects. However, it should be noted that the antistatic performance of b is due to FeSO 4 At the same time, the tensile properties of a may decrease significantly due to the decrease of PU mass fraction.

[0055] Example 3

[0056] (1) First, polyacrylonitrile (PAN) (purchased from Shanghai Junran Plastic Co., Ltd., with a weight average molecular weight of 100,000), FeSO 4 The powder (purchased from Hunan Yide Chemical Co., Ltd.) and polyurethane (PU) (purchased from Anhui Anda Huatai New Materials Co., Ltd.) were dissolved in NN dimethylformamide (DMF) (purchased from Shandong Qilin Chemical Co., Ltd.) to form an air-jet spinning solution. The mass fraction of the raw material PU was 20%, and FeSO 4 The mass fraction of is 10%, the mass fraction of PAN is 70%, the dissolution temperature is 60°C, and the sealed stirring and dissolution is carried out in the heating stirring chamber 102. The stirring time is 48 hours, the weight average molecular weight of PAN is 100000, and the spinning solution concentration is 12wt%.

[0057] (2) The obtained spinning solution was passed through the air-jet spinning device 103 to obtain a nanofiber membrane. The air-jet spinning parameters were: liquid feed volume 5 mL / h -1 , the air pressure was set to 0.10 MPa, the distance from the spinning nozzle to the receiver was 35 cm, the ambient temperature was 25°C, and the ambient humidity was 60%.

[0058] (3) The nanofiber membrane was pre-oxidized at 180°C for 150 min, and then carbonized in a high-temperature carbonization chamber 104 for 4 hours at a carbonization temperature of 800°C to obtain Fe 3 C carbon nanofiber single layer membrane, thickness is 5 μm.

[0059] (4) Fe 3 The C carbon nanofiber single-layer film is placed in the stacking groove 106 and stacked neatly, with the number of stacked layers being 100. It is then hot-pressed by a vacuum hot press machine 107 at a temperature of 1000°C and a pressure of 50 MPa for 5 hours under the heat preservation and pressure holding conditions. After the hot pressing is completed, it is slowly cooled to room temperature, the sample is taken out of the mold, and naturally quenched for 20 minutes. Finally, 100 layers of single-layer film are hot-pressed to form Fe 3 C Carbon nanofiber film multilayer metamaterial.

[0060] (5) Fe 3 The C carbon nanofiber membrane multilayer film is rolled up by the winding drum 108, and then rolled up again by the second roller 109. After completion, it passes through the cutting chamber 110 and is cut according to size, with a length of 100-150m / roll and a width of 20-30mm to obtain the glue strip c.

[0061] Example 3 is a variation of Example 1. The protective clothing pressed rubber strip produced by the production method provided by the present invention is relatively excellent in antistatic performance, tensile strength, gas barrier properties and air tightness, and the production process is simple, which is in line with the original intention of the present invention and is suitable for actual needs in many aspects. However, it should be noted that the gas barrier properties and air tightness of c are better than those of a. At the same time, the tensile properties of c may be greatly reduced due to the increase in the number of hot pressing layers.

[0062] Comparative Example 1

[0063] Fe 3 The preparation method of C carbon nanofiber membrane single layer is the same as that in Example 1.

[0064] Fe 3 The C carbon nanofiber membrane single layer is rolled up by the winding drum 108, and then rolled up again by the second roller 109. After completion, it passes through the cutting chamber 110 and is cut according to size, with a length of 100-150m / roll and a width of 20-30mm to obtain the glue strip d.

[0065] Comparative Example 2

[0066] The method for preparing the nanofiber membrane is the same as that in Example 1.

[0067] (1) A nanofiber single-layer membrane is placed in a stacking groove 106 and stacked neatly, with a stacking number of 75 layers. The nanofiber single-layer membrane is passed through a vacuum hot press 107 at a hot pressing temperature of 1000°C and a hot pressing pressure of 50 MPa. The hot pressing time is 5 hours under the heat preservation and pressure holding conditions. After the hot pressing is completed, the nanofiber single-layer membrane is slowly cooled to room temperature, the sample is taken out of the mold, and naturally quenched for 20 minutes. Finally, 75 layers of single-layer membranes are hot pressed to produce a nanofiber membrane multilayer metamaterial.

[0068] (2) The nanofiber membrane multilayer film is rolled up by a winding drum 108, and then rolled up again by a second roller 109. After completion, it passes through a cutting chamber 110 and is cut according to size, with a length of 100-150m / roll and a width of 20-30mm to obtain a glue strip e.

[0069] Comparative Example 3

[0070] The manufacturing process of the medical protective clothing (pressed adhesive strip) fabric of this comparative example comprises the following steps:

[0071] Weaving: Anti-static fabric is made of polyester filament fiber and conductive fiber. The specification of polyester filament is 68D / 48f; the conductive fiber is carbon fiber with the specification of 20D / 3f.

[0072] Dyeing and finishing / setting: Use sodium hydroxide and clean detergent to dye and set the anti-static fabric. The dyeing and finishing adopts high-temperature overflow dyeing and finishing process, dyeing and finishing at 130℃ and setting at 180℃.

[0073] Functional finishing: Use composite finishing agents to make the protective clothing fabrics waterproof, surface moisture-resistant, and anti-synthetic blood penetration-resistant;

[0074] The composite finishing agent comprises the following components by weight: 2 parts of Forapel waterproofing agent from Atochem Company of France, 2 parts of polydimethylsiloxane, 0.1 parts of nano titanium oxide, and 97.9 parts of water.

[0075] Lamination: Use polytetrafluoroethylene membrane microporous membrane material, laminated with anti-static fabric, the pore size of the breathable micropores is 50nm;

[0076] Rolling: Roll the finished fabric;

[0077] Cutting: Cut the fabric into pieces and pack them;

[0078] Sewing: Use polyester filament thread to sew each garment piece;

[0079] Obtain medical protective clothing (pressed adhesive strip) fabric f.

[0080] Effect evaluation

[0081] The test standards for the performance indicators of the adhesive tape in the protective clothing of the present invention are as follows:

[0082] The antistatic property is determined according to GB / T 12703-1991 "Evaluation of near-point properties of textiles Part 1: Half-life of static voltage"; the airtightness performance is determined according to GB / T 5453-1997 "Determination of air permeability of textile fabrics"; the tensile performance is determined according to GB / T528-1998 "Performance evaluation of building sealing strips for building doors, windows and curtain walls: Determination of tensile strength and tensile recovery".

[0083] The test method for electrostatic decay performance is as follows:

[0084] Test environment: Before testing, the samples were placed in an environment with a relative humidity of 50% ± 3% and a temperature of 23℃ ± 1℃ for 24 hours. The test was also carried out under this condition.

[0085] Sampling: Take a sample with a size of 89mm×(152±6)mm from each key position of the rubber strip on the protective clothing. Wear latex or cotton gloves during the sampling process to prevent contamination of the sample surface.

[0086] Test: According to the method of IST40.2 (01), the test sample is installed on an electrostatic decay measuring instrument that can generate at least positive and negative 5000V voltage, then a voltage of 5000V is applied to the material, and then the charge decay time is measured. The electrostatic decay time and antistatic performance values ​​of each fabric obtained by the test are shown in Table 1.

[0087] The air tightness test method is as follows:

[0088] The air permeability of the fiber membrane was tested using a YG(B)461E fully automatic fabric air permeability tester (Wenzhou Darong Textile Instrument Co., Ltd.). The test area was 20 cm 2 , the pressure difference of the fabric is 200Pa, select a suitable nozzle and start the instrument. When the test starts, the data displayed on the instrument is the air permeability of the fabric. Each group of samples should be tested at least 3 times and the average value is taken. The air tightness values ​​of each fabric obtained by the test are shown in Table 1.

[0089] The test method for tensile strength is as follows:

[0090] The test is carried out according to GB / T 528-1998 using a type 1 dumbbell specimen at a test speed of 500mm / min±50mm / min.

[0091] The test method for tensile elastic recovery is as follows:

[0092] The test was carried out according to the FZT 70006-2004 knitted fabric tensile elastic recovery rate test method. The tensile strength and tensile elastic recovery rate values ​​of each fabric obtained by the test are shown in Table 1.

[0093] The performance results of each glue strip fabric obtained by testing are shown in Table 1:

[0094] Table 1 Performance test results of various glue strip fabrics

[0095]

[0096] In the results of Table 1, the comparison data shows that FeSO in the spinning solution 4 The higher the mass fraction of the carbonized fiber membrane and the more hot-pressed layers, the better the antistatic performance of the obtained adhesive strip. By comparing the data of fabrics a, c, d, and f, it can be seen that after the nanofiber membrane is superimposed on the hot-pressing process, the Fe 3 The more layers of C carbon nanofiber single-layer film, the better the air tightness of the produced pressed strip; comparing the data, it can be seen that the more polyurethane (PU) content in the spinning solution, the better the tensile properties of the produced pressed strip, but the more hot-pressed layers, the more it will affect the tensile properties of the pressed strip.

[0097] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A kind of protective clothing glue strip, It is characterized in that The protective clothing glue strip is composed of several layers of Fe 3 C carbon nanofiber membrane is obtained by hot pressing; The Fe 3 The carbon nanofiber membrane is obtained by air-jet spinning and carbonization of a spinning solution, wherein the solute of the spinning solution includes PAN, FeSO 4 and PU; in the spinning solution, PAN, FeSO 4 The mass ratio of Fe to PU is 7:1-2:1-2; 3 The thickness of the C carbon nanofiber film is 5-8 μm; the protective clothing adhesive strip is composed of 75-100 layers of Fe 3 C carbon nanofiber membrane is obtained by hot pressing.

2. The protective clothing adhesive strip according to claim 1, It is characterized in that The concentration of the solute in the spinning solution is 10-15wt%.

3. The protective clothing adhesive strip according to claim 1, It is characterized in that The weight average molecular weight of the PAN is 80,000-120,000.

4. The protective clothing adhesive strip according to claim 1, It is characterized in that The spinning solution is PAN, FeSO 4 It is obtained by adding an organic solvent to PU and heating it to 50-70°C.

5. The protective clothing adhesive strip according to claim 1, It is characterized in that The carbonization temperature is 800-1000°C.

6. The protective clothing adhesive strip according to claim 1, It is characterized in that The hot pressing is vacuum hot pressing, and the hot pressing time is 1-5 h.

7. The protective clothing adhesive strip according to claim 1, It is characterized in that The conditions of the air-jet spinning are: the liquid feed rate is 4-6 mL·h -1 , the air pressure is set to 0.05-0.15 MPa.

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