CN114391691A

CN114391691A - Antibacterial breathable protective clothing and preparation method thereof

Info

Publication number: CN114391691A
Application number: CN202210069562.6A
Authority: CN
Inventors: 袁强
Original assignee: Xiantao Dingye Labor Insurance Products Co ltd
Current assignee: Xiantao Dingye Labor Insurance Products Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-04-26
Anticipated expiration: 2042-01-21
Also published as: CN114391691B

Abstract

The invention discloses an antibacterial breathable protective garment which is cut from a functional fabric prepared by dry spinning and weaving a microgel spinning stock solution formed by polyetherimide microgel containing antibacterial components, polyacrylonitrile and a solvent into cloth. The protective clothing has excellent mechanical property, simplifies the preparation process, saves the operation of further antibacterial treatment on the fabric, ensures that the protective clothing has good air permeability, has good antibacterial effect, can reduce the attachment and infiltration of dirt, and further improves the protective performance.

Description

Antibacterial breathable protective clothing and preparation method thereof

Technical Field

The invention relates to the technical field of protective clothing, in particular to antibacterial and breathable protective clothing and a preparation method thereof.

Background

Protective clothing, as a special protective garment, is widely applied to the field where harmful microorganisms or dirt needs to be isolated. The protective clothing is usually made of artificial fibers and has good mechanical property and chemical stability; in order to make the protective clothing have an antibacterial effect, the fabric of the protective clothing is generally specially treated in the prior art, and then substances with antibacterial activity are introduced into the protective clothing, so that the protective effect is provided for people.

Patent CN 112323496A discloses a method for preparing an antibacterial fabric, and a fabric and a windproof garment prepared by using the method, wherein the fabric is immersed in an antibacterial treatment solution and then subjected to heat treatment to obtain the fabric with an antibacterial effect; however, impregnation usually requires the use of an excess of liquid medium, and the resulting solution is not only harmful to the environment, but also reduces the comfort of the fabric to some extent. Patent CN 105774121 a provides an antibacterial fabric with a composite fabric layer, and the antibacterial effect is achieved by preparing an antibacterial coating on the surface of the fabric; however, in practical use, the coating is mainly distributed on the surface of the fabric, and the problem of poor durability in long-term use can exist. Patent CN 113512797 a discloses an antibacterial fabric, a weaving method of the antibacterial fabric and an antibacterial and sterilizing garment, wherein antibacterial performance is given to the fabric by introducing antibacterial yarns into the textile process of the fabric; however, the high blend ratio of the antimicrobial component is generally present, and the limited loading capacity of the yarn may prevent the application of this method.

Disclosure of Invention

In view of the above-mentioned defects of the prior art, the technical problems solved by the present invention are: (1) the protective clothing is provided, so that the protective clothing has good antibacterial performance and air permeability; (2) the mechanical property of the protective clothing is improved, and the protective clothing has the anti-fouling capability.

Due to its special use environment, protective clothing has a higher requirement on antibacterial performance than ordinary clothing. In order to make protective clothing have a certain antibacterial property, in the prior art, an antibacterial substance is often introduced into the fabric of the protective clothing in a manner of soaking treatment or depositing an antibacterial coating. The mode of soaking the fabric by using the antibacterial agent solution has the characteristic of simple operation, but a large amount of antibacterial treatment solution is needed in the treatment process, so that waste is easily caused and the pollution of waste liquid to the environment is large; in addition, the antibacterial component is fixed in the fabric in a physical adsorption mode, the attachment capacity is limited, and the antibacterial effect is unstable. The antibacterial coating is prepared on the surface of the fabric, the fabric and the coating are combined in a grafting or crosslinking mode, the coating is compact in texture after grafting or crosslinking, so that the protective clothing is poor in air permeability, heat and sweat are difficult to dissipate in the long-term wearing process, and the wearing comfort degree is greatly reduced.

In order to satisfy both the requirements of antibacterial property and air permeability, in long-term production practice, the inventors tried to introduce an antibacterial substance directly into a spinning dope for dry spinning to make the fiber body constituting the fabric have antibacterial property. However, the inventors have observed that in order to enable the spinning dope to be smoothly spun, the spinning dope must be maintained in a relatively viscous state, and thus there is a technical problem that the dispersibility is poor by directly adding the antibacterial substance. As the antibacterial substance particles are fine and easy to gather, the antibacterial substance particles are difficult to disperse and spread in the spinning solution, and the prepared fabric has poor uniformity. The inventor improves the method, firstly prepares a microgel particle with a shell-core structure, and disperses an antibacterial substance in the microgel particle under the environment with lower viscosity to obtain the microgel with antibacterial performance. The microgel is a polymer particle with an intramolecular cross-linking structure, has better compatibility with organic matter raw materials and solvents in the spinning solution, and has good dispersibility in the spinning solution, so that the dispersion of antibacterial substances is promoted, and the uniformity of the antibacterial substances in the fabric is improved. Specifically, the inventor uses silver nitrate as an antibacterial silver ion source and polyetherimide as an outer shell of a shell-core structure microgel; compared with a dispersion system formed by physical diffusion, silver ions can participate in the process of forming hydrogen bonds with the polyetherimide, and are tightly combined with amino groups or carbonyl groups on the surface of the polyetherimide shell into a polymer network of the shell, so that the antibacterial substance can be favorably retained.

An antibacterial and air-permeable protective garment is made of functional fabric prepared from polyetherimide microgel containing antibacterial components, polyacrylonitrile, and microgel spinning solution formed from solvent through dry spinning and weaving.

Preferably, the preparation method of the antibacterial breathable protective clothing comprises the following steps:

(1) uniformly mixing the polymerized monomer solution and the polyetherimide, adding ammonium persulfate to react, and removing a water phase to obtain polyetherimide microgel;

(2) uniformly mixing the polyetherimide microgel and a silver nitrate aqueous solution, and removing a water phase to obtain silver-containing microgel;

(3) dissolving the silver-containing microgel and polyacrylonitrile in a solvent, uniformly mixing to obtain a microgel spinning solution, and performing dry spinning and spinning to obtain a cloth to obtain the antibacterial breathable fabric;

(4) the antibacterial breathable protective clothing is obtained by cutting, sewing, tightening and adhering adhesive tapes on the antibacterial breathable fabric.

Further preferably, the preparation method of the antibacterial breathable protective clothing comprises the following steps of:

s1, dissolving 14-18 parts of monomer in 90-150 parts of water to obtain a polymerized monomer solution;

s2, adding 70-90 parts of polyetherimide into the polymerized monomer solution obtained in the step S1 in an oxygen-free environment, and mixing; after mixing, adding 0.16-0.8 part of ammonium persulfate, and after reaction, separating to remove a water phase to obtain polyetherimide microgel;

s3, mixing 32.5-58 parts of silver nitrate aqueous solution with the polyetherimide microgel obtained in the step S2, combining silver ions with the polyetherimide microgel through dispersion operation, and then separating and removing a water phase to obtain silver-containing microgel;

s4, uniformly mixing the silver-containing microgel obtained in the step S3, 9-15 parts of polyacrylonitrile and 15-30 parts of solvent to obtain a microgel spinning solution, and performing dry spinning and spinning to obtain a cloth to obtain an antibacterial breathable fabric;

and S5, cutting, sewing, tightening and adhering adhesive tapes to obtain the antibacterial breathable protective clothing.

Preferably, the monomer is N-ethyl acrylamide.

Preferably, the reaction temperature in the step S2 is 105-120 ℃, and the reaction time is 1-3 h; centrifugal separation is used for separation, the centrifugal speed is 12000-16000 rpm, and the centrifugal time is 15-30 min.

Preferably, the dispersion operation in step S3 is: carrying out ultrasonic treatment for 5-15 min at 80-100 ℃, wherein the ultrasonic power is 550-800W, and the ultrasonic frequency is 28-40 kHz; centrifugal separation is used for separation, the centrifugal speed is 12000-16000 rpm, and the centrifugal time is 15-30 min.

Preferably, the solvent is any one of tetrahydrofuran, trifluoroethanol, dichloromethane and chloroform.

Preferably, the aperture of the spinneret plate for dry spinning in the step S4 is 0.12-0.2 mm, the solidification temperature is 70-85 ℃, and the coiling speed is 200-400 m/min.

In the production process of the antibacterial breathable fabric, the inventor observes that the formation of the inner core is the key for preparing the shell-core structure micro gel spheres through emulsion polymerization. The process of crosslinking and nucleating after the polymerization of the N-ethyl acrylamide monomer is slow, and the phenomenon that the shell structure is difficult to form due to the fact that the inner core is too small is often accompanied in actual production, so that the prepared microgel has structural defects. The microgel with structural defects is difficult to effectively fix antibacterial ingredients, and meanwhile, the exposed N-ethyl acrylamide inner core can continue to react with monomers to form a long chain, so that the polymerization of the normal microgel is seriously influenced.

In consideration of operability, the viscosity of the spinning solution should be controlled in a proper range as required, so that the spinning solution is prevented from being difficult to form due to too low viscosity, and the problem that the spinning cannot be performed due to too high viscosity is also avoided. The components in the spinning solution have certain fluidity, and the organic components in the spinning solution are heated and solidified into filaments along with the spinning. The microgel and the matrix are changed from a liquid phase to a solid phase, the compatibility between the microgel and the matrix is reduced due to the removal of a primary solvent in the process, and the internal phase structure may be changed after solidification, so that the uniformity of the structure is weakened and the comprehensive performance is reduced.

Aiming at the defects of the antibacterial breathable fabric, the inventor makes further optimization to prepare the antifouling antibacterial fabric. N, N-methylene bisacrylamide is added in the preparation process of the microgel, the N, N-methylene bisacrylamide can be self-crosslinked, and the self-crosslinked N, N-methylene bisacrylamide and N-ethyl acrylamide react, so that the nucleating speed is high, the formation of a shell-core structure is facilitated, and the stability of the microgel is improved. The inventor continuously reacts the prepared microgel with vinylmethyldiethoxysilane, and introduces a long-chain structure on the surface of the microgel, which is beneficial to the dispersion of the microgel; in the heating and curing process, silicon-oxygen bonds are heated to react to form a cross-arranged net structure, so that the strength of silk fibers and the comprehensive performance of the fabric are improved. Due to the existence of the silicon-oxygen bond net-shaped structure, the hydrophobicity of the fabric is enhanced, the attachment and the infiltration of dirt can be prevented, and the protection effect of the protective clothing is enhanced.

More preferably, the monomer is a mixture of N-ethyl acrylamide and N, N-methylene bisacrylamide according to a mass ratio of (14-18) to (1.6-2.1).

Further preferably, the step S3 may further include: mixing 32.5-58 parts by weight of silver nitrate aqueous solution with the polyetherimide microgel obtained in the step S2, and performing dispersion operation to combine silver ions with the polyetherimide microgel to obtain silver-containing microgel suspension; and reacting the obtained silver-containing microgel suspension with 3.5-14 parts of vinyl methyl diethoxy silane, and separating to remove a water phase to obtain the antibacterial polyetherimide microgel for later use.

Further preferably, the step S4 may further include: and (4) uniformly mixing the antibacterial polyetherimide microgel obtained in the step (S3), 9-15 parts of polyacrylonitrile and 15-30 parts of solvent in parts by weight to obtain a microgel spinning solution, and performing dry spinning and spinning to obtain the cloth, so as to obtain the antibacterial breathable fabric.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The introduction and the function of part of raw materials in the formula of the invention are as follows:

n-ethyl acrylamide: an organic, colorless liquid. The monomer is used as a monomer raw material for preparing the microgel core by emulsion polymerization.

N, N-methylenebisacrylamide: an organic substance, white powdery crystal, which can self-crosslink when exposed to high temperature or strong light. The raw material for preparing the microgel firstly nucleates by virtue of the self-crosslinking characteristic of the microgel and then reacts with N-ethyl acrylamide to form a microgel inner core.

The invention has the beneficial effects that:

compared with the prior art, the antibacterial fabric is prepared by dispersing the antibacterial component in the microgel, taking the microgel as a spinning stock solution raw material, and spinning by a dry method and weaving into cloth; simplifying the preparation process and saving the operation of further antibacterial treatment on the fabric.

Compared with the prior art, the microgel with a shell-core structure prepared by the invention can be effectively combined with antibacterial ingredients, the dispersibility and stability of antibacterial substances in spinning solution are improved, and the antibacterial activity of the protective clothing can be still maintained after multiple times of washing.

Compared with the prior art, the protective clothing has excellent mechanical property and good air permeability; the antibacterial coating has a good antibacterial effect, and can reduce the adhesion and infiltration of dirt, so that the protective performance is further improved.

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.

Some raw material parameters in the comparative examples and examples of the invention are as follows:

n-ethyl acrylamide, CAS No.: 5883-17-0;

n, N-methylenebisacrylamide, CAS No.: 110-26-9.

Example 1

The antibacterial breathable protective clothing is cut from antibacterial breathable fabric, and the antibacterial breathable fabric is prepared by adopting the following method:

s1, dissolving 14kg of N-ethyl acrylamide in 120kg of water to obtain a polymerization monomer solution for later use;

under the protection of S2 nitrogen, 78kg of polyetherimide is added to the polymerization monomer solution obtained in the step S1, and the mixture is mixed; after the mixing is finished, 0.35kg of ammonium persulfate is added, the temperature is raised to 115 ℃, and the reaction is carried out for 2 hours at the temperature; after the reaction, centrifuging at 14000rpm for 25min to remove the water phase to obtain polyetherimide microgel for later use;

s3, dissolving 4.5kg of silver nitrate in 40kg of water to obtain a silver nitrate water solution; mixing the silver nitrate aqueous solution with the polyetherimide microgel obtained in the step S2, and carrying out ultrasonic treatment for 8min at the temperature of 85 ℃, wherein the ultrasonic power is 550W, and the ultrasonic frequency is 40 kHz; combining silver ions with the polyetherimide microgel, and then carrying out centrifugal separation at the speed of 12000rpm for 20min to remove a water phase to obtain silver-containing microgel for later use;

s4, dissolving the silver-containing microgel obtained in the step S3 and 12kg of polyacrylonitrile in 22kg of tetrahydrofuran to obtain microgel spinning solution; and spinning the microgel spinning solution by a dry method to form cloth, thus obtaining the antibacterial breathable fabric, wherein the density of the antibacterial breathable fabric is 210T, and the yarn is woven to be 70D x 70D.

In the step S4, the aperture of the spinneret plate for dry spinning is 0.16mm, the solidification temperature is 85 ℃, and the coiling speed is 240 m/min.

Example 2

The antibacterial breathable protective clothing is cut by using an antifouling antibacterial fabric, and the antifouling antibacterial fabric is prepared by adopting the following method:

s1, dissolving 14kg of N-ethyl acrylamide and 1.8kg of N, N-methylene bisacrylamide in 120kg of water to obtain a polymerization monomer solution for later use;

s4, dissolving the silver-containing microgel obtained in the step S3 and 12kg of polyacrylonitrile in 22kg of tetrahydrofuran to obtain microgel spinning solution; and (3) spinning the microgel spinning solution by a dry method and spinning to form cloth to obtain the antifouling and antibacterial fabric, wherein the density of the antifouling and antibacterial fabric is 210T, and the yarn is 70D x 70D. A

Example 3

s3, dissolving 4.5kg of silver nitrate in 40kg of water to obtain a silver nitrate water solution; mixing the silver nitrate aqueous solution with the polyetherimide microgel obtained in the step S2, and carrying out ultrasonic treatment for 8min at the temperature of 85 ℃, wherein the ultrasonic power is 550W, and the ultrasonic frequency is 40 kHz; combining silver ions with the polyetherimide microgel to obtain silver-containing microgel suspension for later use;

s4 adding 7kg vinylmethyldiethoxysilane into the silver-containing microgel suspension obtained in the step S3, and reacting at 72 ℃ for 1.5 h; after the reaction is finished, carrying out centrifugal separation at the speed of 12000rpm for 20min to remove the water phase, and obtaining the antibacterial polyetherimide microgel for later use;

s5, dissolving the antibacterial polyetherimide microgel obtained in the step S4 and 12kg of polyacrylonitrile in 22kg of tetrahydrofuran to obtain microgel spinning solution; and (3) spinning the microgel spinning solution by a dry method and spinning to form cloth to obtain the antifouling and antibacterial fabric, wherein the density of the antifouling and antibacterial fabric is 210T, and the yarn is 70D x 70D. A

In the step S5, the aperture of the spinneret plate for dry spinning is 0.16mm, the solidification temperature is 85 ℃, and the coiling speed is 240 m/min.

Example 4

Comparative example 1

The antibacterial and breathable protective clothing is cut from a breathable fabric, and the breathable fabric is prepared by the following method: dissolving 12kg of polyacrylonitrile in 22kg of tetrahydrofuran to obtain a spinning solution; and (3) spinning the spinning solution by a dry method, and spinning to obtain the breathable fabric, wherein the density of the breathable fabric is 210T, and the yarn is woven to be 70D x 70D.

Test example 1

Sampling the antibacterial breathable protective clothing fabric, wherein the samples are divided into three groups, each group takes 3 small samples, the size of each small sample is 10cm multiplied by 10cm, and the small samples are cut into 2 pieces on average. Of the three groups of samples, the first group was not subjected to the washing operation, the second group was washed 50 times, and the third group was washed 100 times; the washing operation is carried out according to the specific steps in GB/T8629 and 2017 household washing and drying program for textile test, a C-type standard washing machine is used for washing, and the washing program number is 4N. Three groups of antibacterial properties are tested, and the test refers to GB/T20944.2-2007 evaluation part 2 of antibacterial properties of textiles: the specific procedure in absorption method. The bacteriostasis rate result is obtained by calculating the average value of the numbers according to the requirement and is rounded to an integer number. The results of the antibacterial performance of the antibacterial breathable protective garment fabric after washing are shown in table 1.

TABLE 1

According to the definition in GB/T20944.2-2007, when the bacteriostasis rate is more than or equal to 90%, the sample has an antibacterial effect; when the bacteriostasis rate is more than or equal to 99 percent, the sample has good antibacterial effect. As can be seen from the comparison between the above examples and the comparative examples, the antifouling and antibacterial fabric can still keep good antibacterial effect after being washed for many times. The reason for this phenomenon may be that the antibacterial substance is dispersed inside the microgel particles in an environment with a lower viscosity, and since the microgel is a polymer particle with an intramolecular cross-linking structure and has better compatibility with organic raw materials and solvents in the spinning solution, the microgel has good dispersibility in the spinning solution, so that the dispersion of the antibacterial substance is promoted, and the antibacterial performance of the fabric is improved; compared with a dispersion system formed by physical diffusion, silver ions can participate in the process of forming hydrogen bonds with the polyetherimide, and are tightly combined with amino or carbonyl on the surface of the polyetherimide shell into a polymer network of the shell, so that the antibacterial substance can be retained, and the antibacterial component in the fabric can still exert the effect after being washed for many times. In addition, during the heating and curing of the fibers of the antifouling and antibacterial fabric, the silicon-oxygen bonds are heated to react to form a cross-arranged net structure, so that the hydrophobicity is enhanced, the adhesion of dirt is reduced, and the antibacterial performance of the fabric can be enhanced.

Test example 2

The air permeability of the antibacterial and air permeable protective clothing is carried out according to the specific requirements in GB/T5453-1997 determination of the air permeability of textile fabrics. The test area is 20cm²The test pressure drop was 100Pa, and the remaining test steps were according to the above criteria. 5 specimens were tested per group and the results were arithmetically averaged. The results of the air permeability tests on the antibacterial and breathable protective clothing are shown in table 2.

TABLE 2

Test set	Air permeability (mm/s)
		Example 1	183
Example 2	186
		Example 3	191
Example 4	197
		Comparative example 1	174

The air permeability reflects the degree of the air permeability of the clothes. As can be seen by comparing the examples and the comparative examples, the air permeability of the fabric used in the invention is more than or equal to 180mm/s, which means that the antibacterial fabric prepared by the processing method of the invention has good air permeability, is not stuffy after being worn, and is beneficial to improving the comfort of protective clothing. The reason for the phenomenon is probably that the antibacterial component is dispersed in the microgel, and the microgel is used as a spinning stock solution raw material to directly prepare the fabric with antibacterial performance through dry spinning and cloth spinning; compared with the traditional method for performing subsequent soaking treatment or depositing a coating to increase antibacterial property, the antibacterial breathable fabric has the advantages that the fiber space of the fabric is looser and breathable, and the surface layer is not provided with a compact antibacterial coating, so that smooth sweat discharge is facilitated.

Test example 3

Rectangular strip specimens 200mm x 50mm in size were taken from the antimicrobial, breathable protective clothing and tested for tear strength. The tear strength was tested according to the specific requirements of GB/T3917.2-2009 "determination of tear Performance for textile fabrics part 2 trouser specimens (Single slit) tear Strength". Cutting a crack with the length of 100mm parallel to the length direction from the center of the width direction of the sample according to requirements, and testing; the tensile speed of the test was 100mm/min and the gauge length was 100 mm. 5 specimens were tested per group and the results were arithmetically averaged. The tear strength test results for the antimicrobial breathable protective garment are shown in table 3.

TABLE 3

Test set	Tear Strength (N)
		Example 1	36.5
Example 2	37.2
		Example 3	40.3
Example 4	43.0
		Comparative example 1	38.1

The tear strength represents how strongly the bonds between the fibers of the garment are. Protective clothing, as a protective garment, should have a high tear strength to prevent breakage during use. As can be seen by comparing the above examples with the comparative examples, example 4 has the highest tear strength. The reason for this result may be that the microgel prepared by the present invention is continuously reacted with vinylmethyldiethoxysilane to introduce a long chain structure on the surface of the microgel, which is beneficial to the dispersion of the microgel and prevents structural defects caused by local aggregation; in the heating and curing process, silicon-oxygen bonds are heated to react to form a cross-arranged net structure, so that the strength of silk fibers and the tearing strength of the fabric are improved.

Claims

1. A preparation method of antibacterial breathable protective clothing is characterized by comprising the following steps: the functional fabric is prepared by dry spinning and weaving a microgel spinning solution formed by polyetherimide microgel containing antibacterial ingredients, polyacrylonitrile and a solvent into cloth.

2. The method of making an antimicrobial breathable protective garment according to claim 1, wherein:

3. The method for preparing the antibacterial breathable protective clothing according to claim 2 is characterized by comprising the following steps of:

4. A method of making an antimicrobial breathable protective garment according to claim 3, wherein: the monomer is N-ethyl acrylamide or a mixture of N-ethyl acrylamide and N, N-methylene bisacrylamide according to a mass ratio of (14-18) to (1.6-2.1).

5. The method for preparing antibacterial breathable protective clothing according to claim 3, wherein the step S3 is further comprising: mixing 32.5-58 parts by weight of silver nitrate aqueous solution with the polyetherimide microgel obtained in the step S2, and performing dispersion operation to combine silver ions with the polyetherimide microgel to obtain silver-containing microgel suspension; and reacting the obtained silver-containing microgel suspension with 3.5-14 parts of vinyl methyl diethoxy silane, and separating to remove a water phase to obtain the antibacterial polyetherimide microgel for later use.

6. The method for preparing antibacterial breathable protective clothing according to claim 3, wherein the step S4 is further comprising: and (4) uniformly mixing the antibacterial polyetherimide microgel obtained in the step (S3), 9-15 parts of polyacrylonitrile and 15-30 parts of solvent in parts by weight to obtain a microgel spinning solution, and performing dry spinning and spinning to obtain the cloth, so as to obtain the antibacterial breathable fabric.

7. A method of making an antimicrobial breathable protective garment according to claim 3, wherein: the reaction temperature in the step S2 is 105-120 ℃, and the reaction time is 1-3 h; centrifugal separation is used for separation, the centrifugal speed is 12000-16000 rpm, and the centrifugal time is 15-30 min.

8. A method of manufacturing antibacterial breathable protective clothing according to claim 3 or 5, characterized in that: the dispersion operation in step S3 is: carrying out ultrasonic treatment for 5-15 min at 80-100 ℃, wherein the ultrasonic power is 550-800W, and the ultrasonic frequency is 28-40 kHz; centrifugal separation is used for separation, the centrifugal speed is 12000-16000 rpm, and the centrifugal time is 15-30 min.

9. A method of manufacturing antibacterial breathable protective clothing according to claim 3 or 6, characterized in that: in the step S4, the aperture of the spinneret plate for dry spinning is 0.12-0.2 mm, the solidification temperature is 70-85 ℃, and the coiling speed is 200-400 m/min.

10. An antibacterial and breathable protective garment is characterized in that: prepared by the method of any of claims 1 to 9.