Antibacterial polar fleece fabric and preparation method thereof

Abstract

The invention relates to an antibacterial polar fleece fabric and a preparation method thereof, and belongs to the technical field of high polymer materials. The bacteriostatic polar fleece fabric comprises the following components in parts by weight: 30-60 parts of superfine polyester, 20-30 parts of heating viscose, 30-40 parts of polyester low stretch yarn, 80-95 parts of polyester yarn, 5-13 parts of elastic spandex and 1-5 parts of a modified bacteriostatic agent, in the modified bacteriostatic agent, quaternary ammonium salt can permeate bacterial cell walls, react with membrane protein to break the membrane protein, adsorb negatively charged bacteria, disturb charge distribution and hinder synthesis of bacterial protein, nano titanium oxide generates strong oxidizing substances and destroys bacterial organic matters under ultraviolet light, and released titanium ions destroy the bacterial cell walls to cause bacterial death. Cyanuric chloride can fix the surface of the fabric, endows the fabric with an antibacterial function, reacts with bacterial protein and destroys a cell structure, so that the antibacterial effect is achieved; the antibacterial polar fleece fabric prepared by the preparation method disclosed by the invention not only has an excellent antibacterial effect, but also has good comfort.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and particularly relates to an antibacterial polar fleece fabric and a preparation method thereof. Background Art

[0002] With the improvement of modern life quality and the enhancement of health and safety awareness, people pay more and more attention to disease prevention and hygiene protection. The requirements for fabrics are not limited to practicality and comfort, but also focus on their antibacterial functions, in order to protect the health of human skin and maintain environmental stability to build a protective barrier against germs.

[0003] However, traditional polar fleece fabrics lack antibacterial properties, and bacteria are easily bred on their surfaces after long-term use. These bacteria not only cause mildew and affect the appearance, but may also irritate human skin, cause disease, and even threaten the life safety of individuals. High-quality fabrics act as a barrier between the skin and the environment, which can effectively isolate bacteria and protect individuals from bacterial invasion. Therefore, antibacterial treatment of fabrics is crucial, which can protect the fabrics from mildew, prevent bacterial cross-infection, and ensure the health of the wearer. Although existing polar fleece fabrics have antibacterial effects, the effects are significantly weakened or even ineffective after washing, and cannot meet market demand. Therefore, the research and development of polar fleece fabrics with excellent antibacterial effects has important practical significance and application value. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an antibacterial polar fleece fabric and a preparation method thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An antibacterial polar fleece fabric comprises the following raw materials in parts by weight: 30-60 parts of superfine polyester, 20-30 parts of heating viscose, 30-40 parts of polyester low-elastic yarn, 80-95 parts of polyester yarn, 5-13 parts of elastic spandex, and 1-5 parts of modified antibacterial agent.

[0007] The modified antibacterial agent is prepared by the following method:

[0008] Step A1: 1,3-dichloroisopropanol, 4-dimethylaminobenzoic acid and ethanol were mixed, stirred at 50° C. for 72 h, rotary evaporated, washed, filtered, and vacuum dried at 40° C. for 4 h to obtain a quaternary ammonium salt compound;

[0009] Further, the usage ratio of 1,3-dichloroisopropanol, 4-dimethylaminobenzoic acid, and ethanol is 1.2-1.5 g: 3.3-4.5 g: 100-150 mL;

[0010] Step A2: Disperse the quaternary ammonium salt compound in dimethyl sulfoxide, stir vigorously for 30 min under an ice bath, then add cyanuric chloride, tetrahydrofuran, sodium carbonate, and deionized water, react for 4 h under an ice bath, wash, and dry in vacuum at 40 °C for 4 h to obtain the pre-product;

[0011] Further, the dosage ratio of the quaternary ammonium salt compound, dimethyl sulfoxide, cyanuric chloride, tetrahydrofuran, sodium carbonate, and deionized water is 1.5 - 2.5 g : 40 - 60 mL : 0.5 - 0.7 g : 5 - 10 mL : 0.15 - 0.3 g : 5 - 10 mL;

[0012] Step A3: Mix γ-aminopropyltriethoxysilane, ethanol-water mixed solution, and nano-titanium oxide at 35 °C for 10 min, then raise the temperature to 60 °C, under nitrogen protection, add the pre-product, heat to 60 °C, react for 6 h, filter and wash, and dry at 45 °C to obtain the modified antibacterial agent;

[0013] Further, the dosage ratio of γ-aminopropyltriethoxysilane, ethanol-water mixed solution, nano-titanium oxide, and pre-product is 4 - 6 g : 150 mL : 100 - 150 g : 6 - 8 g, and the volume ratio of ethanol to water in the ethanol-water mixed solution is 4:1.

[0014] A preparation method of an antibacterial polar fleece fabric specifically includes the following steps:

[0015] S1: Put the superfine polyester into an ultrasonic cleaner and wash at 90 °C for 1 h, dry at 115 °C, then add dimethyl sulfoxide, swell in an oven at 140 °C for 1 h, suck the residual liquid on the surface of the polyester with filter paper, in a nitrogen environment, add N-(hydroxymethyl)-2-methyl-2-propenamide and benzoyl peroxide, and stir for 2 h to obtain the modified superfine polyester;

[0016] S2: Mix the modified superfine polyester with heat-generating viscose, weft-knit a fluffy layer on the ground tissue polyester low-elastic yarn to obtain the surface fabric blank, put it into a cylinder for dyeing, add a raising agent, perform pre-drying and pre-setting, the pre-setting temperature is 170 - 180 °C, perform raising and softening finishing on the blank through a padding mangle, then perform brushing and shearing, the shearing length is 2 - 4 mm, and perform polar fleece treatment on the surface fluffy layer, the thickness of the fluffy layer after polar fleece treatment is 0.5 - 1 mm, to obtain the polar fleece fabric;

[0017] S3: Weft-knit polyester yarn and elastic spandex, perform heat setting, the heat setting temperature is 205 °C, the machine speed is 15 Y / min, take off the machine and put it into a cylinder for dyeing to obtain the inner layer fabric blank;

[0018] S4: Immerse the polar fleece fabric in the impregnating solution by padding, react at 80 °C for 24 h, dry at 140 - 180 °C for 1 - 5 h, then laminate it to one side of the TPU low-permeability film at a temperature of 85 - 90 °C and a machine speed of 20 m / min, and let it stand for 10 - 12 h. Laminating the inner layer fabric blank to the other side of the TPU low-permeability film at a temperature of 85 - 90 °C and a machine speed of 25 m / min gives the antibacterial polar fleece fabric.

[0019] Further, the impregnating solution is a mixture of a modified antibacterial agent, potassium carbonate, and absolute ethanol, with a dosage ratio of 0.1 - 0.2 mol : 0.2 - 0.4 mol : 8 mL.

[0020] Advantages of the present invention:

[0021] The antibacterial polar fleece fabric of the present invention has good thermal insulation effect, while also ensuring its comfort and antibacterial performance, maintaining the stability of the human microenvironment.

[0022] The modified antibacterial agent prepared in the present invention first uses the chlorine atom of 1,3-dichloroisopropanol to react with the hydroxyl group of 4-dimethylaminobenzoic acid to quaternize 4-dimethylaminobenzoic acid and form a quaternary ammonium salt compound; secondly, uses the hydroxyl group of the quaternary ammonium salt compound to react with the chlorine atom of cyanuric chloride to generate a pre-product; finally, uses the siloxy group of the silane coupling agent γ-aminopropyltriethoxysilane to hydrolyze into silanol groups, react with the hydroxyl groups on the surface of nano-titanium oxide, and then uses the amino group of the coupling agent to condense with the carboxyl group of the pre-product to form an amide bond to synthesize the modified antibacterial agent. The quaternary ammonium salt compound in the modified antibacterial agent can penetrate the bacterial cell wall, react with the proteins on the bacterial cell membrane, cause the membrane to rupture, leak the proteins inside the bacteria, and accelerate the death of the bacteria, thereby improving the antibacterial effect. At the same time, the positive charge of the quaternary ammonium salt compound can also adsorb negatively charged bacteria through electrostatic interaction, disrupt the surface charge distribution of the bacteria, affect the normal activities of the cell membrane, and further hinder the protein synthesis of the bacteria; in addition, nano-titanium oxide can generate strong oxidizing properties under ultraviolet light to generate H 2 O 2 and reactive oxygen species, destroy the organic matter of the bacteria, inhibit their growth and reproduction. At the same time, the released titanium ions destroy the bacterial cell wall, cause the cell contents to flow out, and trigger the denaturation of proteins in the bacteria, resulting in the death of the bacteria; in addition, cyanuric chloride in the modified antibacterial agent can not only react with the hydroxyl groups on the modified superfine polyester, fix the modified antibacterial agent on the surface of the fabric in the form of chemical bonds, endow the fabric with excellent antibacterial function, but also react with the proteins in the bacterial cell wall, destroy the cell structure of the bacteria, so as to achieve the antibacterial effect. Detailed implementation methods

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Embodiment 1: A preparation method of an antibacterial polar fleece fabric specifically includes the following steps:

[0025] S1: Weigh the raw materials by weight parts, 30 parts of superfine polyester, 20 parts of heat-generating viscose, 30 parts of polyester drawn texturing yarn, 80 parts of polyester yarn, 5 parts of elastic spandex, and 1 part of modified antibacterial agent (prepared in this embodiment); put the superfine polyester into an ultrasonic cleaner and wash it at 90°C for 1 h, dry it at 115°C, then add dimethyl sulfoxide, and swell it in an oven at 140°C for 1 h. Blot the residual liquid on the surface of the polyester with filter paper. Under a nitrogen environment, add N-(hydroxymethyl)-2-methyl-2-propenamide and benzoyl peroxide, and stir for 2 h to obtain modified superfine polyester;

[0026] S2: Mix the modified superfine polyester with the heat-generating viscose, and weft-knit a plush layer on the ground tissue polyester drawn texturing yarn to obtain a surface fabric blank. Put it into a cylinder for dyeing, add a raising agent, and perform pre-drying and pre-setting. The pre-setting temperature is 170°C. Perform raising and softening finishing on the blank through a padding mangle, then perform brushing and shearing. The shearing length is 2 mm, and perform polar fleece treatment on the surface plush layer. After polar fleece treatment, the thickness of the plush layer is 0.5 mm to obtain a polar fleece fabric;

[0027] S3: Weft-knit the polyester yarn and elastic spandex, and perform heat setting. The heat setting temperature is 205°C, the machine speed is 15 Y / min. Take it off the machine and put it into a cylinder for dyeing to obtain a lining fabric blank;

[0028] S4: Immerse and roll the polar fleece fabric in an impregnating solution, react at 80°C for 24 h, dry it at 140°C for 1 h, then laminate it to one side of a TPU low-permeability membrane at a temperature of 85°C and a machine speed of 20 m / min. Let it stand for 10 h after lamination. Laminating the lining fabric blank to the other side of the TPU low-permeability membrane at a temperature of 85°C and a machine speed of 25 m / min to obtain the antibacterial polar fleece fabric. The impregnating solution is a mixture of a modified antibacterial agent, potassium carbonate, and absolute ethanol, and the dosage ratio is 0.1 mol: 0.2 mol: 8 mL;

[0029] The modified antibacterial agent is prepared by the following method:

[0030] Step A1: Mix 1.2 g of 1,3-dichloroisopropanol, 3.3 g of 4-dimethylaminobenzoic acid, and 100 mL of ethanol, stir and react at 50°C for 72 h, perform rotary evaporation, washing, suction filtration, and vacuum drying at 40°C for 4 h to obtain a quaternary ammonium salt compound;

[0031] Step A2: Disperse 1.5 g of the quaternary ammonium salt compound in 40 mL of dimethyl sulfoxide, stir vigorously for 30 min under an ice bath, then add 0.5 g of cyanuric chloride, 5 mL of tetrahydrofuran, 0.15 g of sodium carbonate, and 5 mL of deionized water, react for 4 h under an ice bath, wash, and dry in vacuum at 40 °C for 4 h to obtain a pre-product;

[0032] Step A3: Mix 4 g of γ-aminopropyltriethoxysilane, 150 mL of an ethanol-water mixed solution, and 100 g of nano-titanium oxide at 35 °C for 10 min, then raise the temperature to 60 °C, under nitrogen protection, add 6 g of the pre-product, heat to 60 °C, react for 6 h, filter and wash, and dry at 45 °C to obtain a modified antibacterial agent; the volume ratio of ethanol to water in the ethanol-water mixed solution is 4:1.

[0033] Example 2: A preparation method of an antibacterial polar fleece fabric, specifically including the following steps:

[0034] S1: Weigh raw materials by weight parts, 45 parts of superfine polyester, 25 parts of heat-generating viscose, 35 parts of polyester drawn texturing yarn, 90 parts of polyester yarn, 9 parts of elastic spandex, 3 parts of modified antibacterial agent (prepared by this example); put the superfine polyester into an ultrasonic cleaner and wash at 90 °C for 1 h, dry at 115 °C, then add dimethyl sulfoxide, swell in an oven at 140 °C for 1 h, suck the residual liquid on the surface of the polyester with filter paper, and add N-(hydroxymethyl)-2-methyl-2-propenamide and benzoyl peroxide under a nitrogen environment, stir for 2 h to obtain modified superfine polyester;

[0035] S2: Mix the modified superfine polyester with the heat-generating viscose, weft-knit a plush layer on the ground tissue polyester drawn texturing yarn to obtain a surface fabric blank, put it into a cylinder for dyeing, add a raising agent, perform pre-setting drying, the pre-setting temperature is 175 °C, perform raising and softening finishing on the blank through a padding mangle, then perform brushing and shearing, the shearing length is 3 mm, and perform polar fleece treatment on the surface plush layer, the thickness of the plush layer after polar fleece treatment is 0.75 mm to obtain a polar fleece fabric;

[0036] S3: Weft-knit the polyester yarn and elastic spandex, perform heat setting, the heat setting temperature is 205 °C, the machine speed is 15 Y / min, take off the machine and put it into a cylinder for dyeing to obtain an inner layer fabric blank;

[0037] S4: Immerse and pad the polar fleece fabric in the impregnating solution, react at 80 °C for 24 h, dry at 160 °C for 3 h, then laminate it to one side of a TPU low-permeability membrane at a temperature of 87 °C and a machine speed of 20 m / min, laminate and place for 11 h, laminate the inner layer fabric blank to the other side of the TPU low-permeability membrane at a temperature of 87 °C and a machine speed of 25 m / min to obtain an antibacterial polar fleece fabric, and the impregnating solution is mixed with the modified antibacterial agent, potassium carbonate, and absolute ethanol, and the dosage ratio is 0.15 mol: 0.3 mol: 8 mL;

[0038] The modified antibacterial agent is prepared by the following method:

[0039] Step A1: Mix 1.35 g of 1,3-dichloroisopropanol, 3.9 g of 4-dimethylaminobenzoic acid and 125 mL of ethanol, stir and react at 50 °C for 72 h, perform rotary evaporation, washing, suction filtration, and vacuum dry at 40 °C for 4 h to obtain a quaternary ammonium salt compound;

[0040] Step A2: Disperse 2 g of the quaternary ammonium salt compound in 50 mL of dimethyl sulfoxide, vigorously stir in an ice bath for 30 min, then add 0.6 g of cyanuric chloride, 7 mL of tetrahydrofuran, 0.22 g of sodium carbonate and 7 mL of deionized water, react in an ice bath for 4 h, wash, and vacuum dry at 40 °C for 4 h to obtain a pre-product;

[0041] Step A3: Mix 5 g of γ-aminopropyltriethoxysilane, 150 mL of ethanol-water mixed solution and 125 g of nano-titanium oxide at 35 °C for 10 min, then raise the temperature to 60 °C, under nitrogen protection, add 7 g of the pre-product, heat to 60 °C, react for 6 h, filter, wash, and dry at 45 °C to obtain a modified antibacterial agent; the volume ratio of ethanol to water in the ethanol-water mixed solution is 4:1.

[0042] Example 3: A preparation method of an antibacterial polar fleece fabric, specifically including the following steps:

[0043] S1: Weigh raw materials by weight, 60 parts of superfine polyester, 30 parts of heat-generating viscose, 40 parts of polyester drawn texturing yarn, 95 parts of polyester yarn, 13 parts of elastic spandex, 5 parts of modified antibacterial agent (prepared in this example); put the superfine polyester into an ultrasonic cleaner and wash at 90 °C for 1 h, dry at 115 °C, then add dimethyl sulfoxide, swell in an oven at 140 °C for 1 h, suck the residual liquid on the surface of the polyester with filter paper, and in a nitrogen environment, add N-(hydroxymethyl)-2-methyl-2-propenamide and benzoyl peroxide, stir for 2 h to obtain modified superfine polyester;

[0044] S2: Mix the modified superfine polyester with the heat-generating viscose, weft-knit a plush layer on the ground tissue polyester drawn texturing yarn to obtain a surface fabric blank, put it into a cylinder for dyeing, add a raising agent, perform pre-setting drying, the pre-setting temperature is 180 °C, perform raising and softening finishing on the blank through a padding mangle, then perform brushing and shearing, the shearing length is 4 mm, and perform polar fleece treatment on the surface plush layer, the thickness of the plush layer after polar fleece treatment is 1 mm to obtain a polar fleece fabric;

[0045] S3: Weft-knit the polyester yarn and elastic spandex, perform heat setting, the heat setting temperature is 205 °C, the machine speed is 15 Y / min, take off the machine and put it into a cylinder for dyeing to obtain a lining fabric blank;

[0046] S4: Dip the polar fleece fabric in the impregnating solution, react at 80 °C for 24 h, dry at 180 °C for 5 h, then laminate it to one side of the TPU low-permeability membrane at a temperature of 90 °C and a machine speed of 20 m / min, and let it stand for 12 h. Laminate the inner fabric blank to the other side of the TPU low-permeability membrane at a temperature of 90 °C and a machine speed of 25 m / min to obtain the antibacterial polar fleece fabric. The impregnating solution is a mixture of a modified antibacterial agent, potassium carbonate, and absolute ethanol, with a dosage ratio of 0.2 mol: 0.4 mol: 8 mL;

[0047] The modified antibacterial agent is prepared by the following method:

[0048] Step A1: Mix 1.5 g of 1,3-dichloroisopropanol, 4.5 g of 4-dimethylaminobenzoic acid, and 150 mL of ethanol, stir and react at 50 °C for 72 h, perform rotary evaporation, washing, suction filtration, and vacuum dry at 40 °C for 4 h to obtain the quaternary ammonium salt compound;

[0049] Step A2: Disperse 2.5 g of the quaternary ammonium salt compound in 60 mL of dimethyl sulfoxide, stir vigorously in an ice bath for 30 min, then add 0.7 g of cyanuric chloride, 10 mL of tetrahydrofuran, 0.3 g of sodium carbonate, and 10 mL of deionized water, react in an ice bath for 4 h, wash, and vacuum dry at 40 °C for 4 h to obtain the pre-product;

[0050] Step A3: Mix 6 g of γ-aminopropyltriethoxysilane, 150 mL of an ethanol-water mixed solution, and 150 g of nano-titanium oxide at 35 °C for 10 min, then raise the temperature to 60 °C, under nitrogen protection, add 8 g of the pre-product, heat to 60 °C, react for 6 h, filter, wash, and dry at 45 °C to obtain the modified antibacterial agent; the volume ratio of ethanol to water in the ethanol-water mixed solution is 4:1.

[0051] Comparative Example

[0052] This comparative example is an antibacterial polar fleece fabric. The difference from Example 3 is that an equal amount of zinc oxide is used instead of the modified antibacterial agent prepared in Example 3, and the rest are the same.

[0053] Performance test: Cut the antibacterial polar fleece fabrics prepared in Examples 1-3 and Comparative Examples 1-2 into standard test sizes, and refer to GB / T20944.3-2008 "Evaluation of antibacterial properties of textiles - Part 3: Oscillation method" for antibacterial testing. According to the JISL 1096 standard, the softness and permeability of the fabric are represented by the stiffness R. The smaller the R value, the softer the fabric (the R value of pure cotton is 3.46); the test results are shown in the following table:

[0054]

[0055] As can be seen from the data tested in the table, the antibacterial polar fleece fabric prepared in Example 1 has excellent antibacterial effects. It can also be seen from the above table that the antibacterial polar fleece fabric prepared by the present invention has good comfort.

[0056] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of this technology can make various modifications or supplements to the specific embodiments described or use similar methods for substitution. As long as they do not deviate from the concept of the invention or exceed the scope defined by this claims, they should all fall within the protection scope of the present invention.

Claims

1. A method for preparing antibacterial polar fleece fabric, characterized in that: The following steps are involved: S1: weigh the raw materials by weight, including 30-60 parts of ultrafine polyester, 20-30 parts of heating viscose, 30-40 parts of polyester low-elastic yarn, 80-95 parts of polyester yarn, 5-13 parts of elastic spandex, and 1-5 parts of modified antibacterial agent; wash the ultrafine polyester in an ultrasonic cleaner at 90°C for 1 hour, dry at 115°C, add dimethyl sulfoxide, swell in an oven at 140°C for 1 hour, absorb the residual liquid on the surface of the polyester with filter paper, add N-(hydroxymethyl)-2-methyl-2-acrylamide and benzoyl peroxide in a nitrogen environment, and stir for 2 hours to obtain modified ultrafine polyester; S2: Modified ultrafine polyester is mixed with heating viscose, and a fleece layer is weft-knitted on the low-elastic polyester yarn to obtain a surface fabric grey cloth, which is then dyed in a vat, and a raising agent is added, and the fabric is dried and pre-shaped at a temperature of 170-180°C. The grey cloth is raised and softened by a padder, and then brushed and sheared. The shearing length is 2-4mm, and the surface fleece layer is subjected to polarization treatment. The thickness of the fleece layer after polarization is 0.5-1mm, and a polar fleece fabric is obtained; S3: Weft knitting the polyester yarn and the elastic spandex, heat setting the yarn at a temperature of 205°C and a machine speed of 15 Y / min, and then putting the yarn into a dyeing vat to obtain a lining fabric; S4: The polar fleece fabric is dipped into the impregnation liquid, reacted at 80℃ for 24h, dried at 140-180℃ for 1-5h, and then laminated to one side of the TPU low-transmittance film at a temperature of 85-90℃ and a machine speed of 20m / min. The laminate is placed for 10-12h, and the inner fabric grey cloth is laminated to the other side of the TPU low-transmittance film at a temperature of 85-90℃ and a machine speed of 25m / min to obtain the antibacterial polar fleece fabric.

2. The method for preparing an antibacterial polar fleece fabric according to claim 1, characterized in that: The modified antibacterial agent is prepared by the following method: Step A1: 1,3-dichloroisopropanol, 4-dimethylaminobenzoic acid and ethanol were mixed, stirred at 50° C. for 72 h, rotary evaporated, washed, filtered, and vacuum dried at 40° C. for 4 h to obtain a quaternary ammonium salt compound; Step A2: dispersing the quaternary ammonium salt compound in dimethyl sulfoxide, vigorously stirring for 30 min in an ice bath, then adding cyanuric chloride, tetrahydrofuran, sodium carbonate and deionized water, reacting for 4 h in an ice bath, washing, and vacuum drying at 40° C. for 4 h to obtain a pre-product; Step A3: Mix γ-aminopropyltriethoxysilane, ethanol-water mixed solution and nano-titanium oxide at 35°C for 10 minutes, then heat to 60°C, add the pre-product under nitrogen protection, heat to 60°C, react for 6 hours, filter, wash, and dry at 45°C to obtain a modified antibacterial agent.

3. The method for preparing an antibacterial polar fleece fabric according to claim 2, characterized in that: In step A1, the usage ratio of 1,3-dichloroisopropanol, 4-dimethylaminobenzoic acid and ethanol is 1.2-1.5 g: 3.3-4.5 g: 100-150 mL.

4. The method for preparing an antibacterial polar fleece fabric according to claim 2, characterized in that: In step A2, the usage ratio of the quaternary ammonium salt compound, dimethyl sulfoxide, cyanuric chloride, tetrahydrofuran, sodium carbonate and deionized water is 1.5-2.5 g: 40-60 mL: 0.5-0.7 g: 5-10 mL: 0.15-0.3 g: 5-10 mL.

5. The method for preparing an antibacterial polar fleece fabric according to claim 2, characterized in that: In step A3, the usage ratio of γ-aminopropyltriethoxysilane, ethanol-water mixed solution, nano-titanium oxide, and pre-product is 4-6g:150mL:100-150g:6-8g, and the volume ratio of ethanol to water in the ethanol-water mixed solution is 4:

1.

6. The method for preparing an antibacterial polar fleece fabric according to claim 1, characterized in that: The impregnation liquid is mixed with a modified antibacterial agent, potassium carbonate and anhydrous ethanol, and the dosage ratio is 0.1-0.2 mol: 0.2-0.4 mol: 8 mL.

7. An antibacterial polar fleece fabric, characterized in that: Prepared according to the preparation method according to any one of claims 1 to 6.

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