Antibacterial clothing fabric and processing technology thereof

Abstract

This invention relates to the field of garment fabric processing technology, and discloses an antibacterial garment fabric and its processing technology. The processing technology includes the following steps: Step 1, Pretreatment: The cotton base fabric is immersed in a solution containing 0.5-3 wt% sodium hydroxide, treated at 60°C for 30 minutes, and washed with water until neutral; Step 2, Conditioner Coating: The pretreated base fabric is immersed in a conditioner solution (solid content 10-15%), dipped and rubbed twice, with a liquid retention rate of 70-80%. The conditioner, by weight, includes: 40-60 parts of modified zeolite powder (particle size ≤100nm); 20-30 parts of carboxymethyl chitosan quaternary ammonium salt; and silane coupling agent KH-560. 5-10 parts; 10-15 parts of polyethylene glycol diacrylate; 100-120 parts of deionized water; Through the synergistic effect of pretreatment, application of modified zeolite powder, stepwise hot pressing activation, rapid cooling curing, hot pressing-rapid cooling synergy, and addition of carboxymethyl chitosan quaternary ammonium salt, significant beneficial effects were achieved: In terms of antibacterial performance, the antibacterial rate against Staphylococcus aureus and Escherichia coli was ≥99%.

Description

Technical Field

[0001] This invention relates to the field of clothing fabric processing technology, specifically to an antibacterial clothing fabric and its processing technology. Background Technology

[0002] As people's living standards improve, the functional requirements for clothing fabrics are increasing, with antibacterial and anti-mite properties becoming important considerations. Traditional antibacterial fabric processing often involves direct impregnation with antibacterial agents, which has problems such as easy agent shedding, short-lasting antibacterial effect, and potential irritation to the human body. Furthermore, most fabrics cannot simultaneously possess good antibacterial and anti-mite properties, failing to meet people's demand for healthy and comfortable clothing. Therefore, developing a clothing fabric processing technology that offers long-lasting antibacterial effects, unexpected anti-mite properties, and safety for human health is of great significance. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a processing technology for antibacterial clothing fabrics. Through specific pretreatment, conditioning agent coating, step-by-step hot pressing activation, rapid cooling curing and post-treatment, the prepared fabric has excellent and long-lasting antibacterial properties, and at the same time unexpectedly obtains good anti-mite properties.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an antibacterial clothing fabric and its processing technology, comprising the following steps:

[0005] Step 1, Pretreatment: Immerse the cotton base fabric in a solution containing 0.5-3wt% sodium hydroxide, treat at 60℃ for 30 minutes, and wash with water until neutral;

[0006] Step 2, Conditioner Coating: Immerse the pretreated base fabric in a conditioner solution (solid content 10-15%), perform two dips and two smears, with a liquid retention rate of 70-80%;

[0007] The regulator comprises, by weight, the following:

[0008] Modified zeolite powder (particle size ≤100nm) 40-60 parts;

[0009] 20-30 parts of carboxymethyl chitosan quaternary ammonium salt;

[0010] 5-10 parts of silane coupling agent KH-560;

[0011] 10-15 parts of polyethylene glycol diacrylate;

[0012] 100-120 parts deionized water;

[0013] Step 3, Stepped hot pressing activation:

[0014] First stage: Hot pressing at 80-90℃ and 0.5MPa pressure for 5 minutes to form a preliminary cross-linked network;

[0015] The second stage: heating to 120-130℃ and hot pressing at 1.2-1.5MPa for 8 minutes to oriented and embed the zeolite micropores into the fiber surface;

[0016] Step 4, rapid cooling and curing: Immediately transfer the fabric into a -10℃ cold trap and maintain it for 10 minutes to induce the formation of surface microcracks;

[0017] Step 5, Post-treatment: Rinse in 50℃ warm water for 10 minutes, then treat with ultraviolet radiation, and dry at 80℃ to obtain antibacterial fabric.

[0018] Preferably, natural zeolite powder is activated with 0.1M hydrochloric acid and then refluxed with 3-aminopropyltriethoxysilane in ethanol at a mass ratio of 5:1 for 2 hours to obtain aminated zeolite.

[0019] Preferably, in the regulator described in step two, the degree of substitution of carboxymethyl chitosan quaternary ammonium salt is ≥0.85, and its quaternary ammonium groups form ionic bonds with the amino groups on the zeolite surface through hot pressing in step three.

[0020] Preferably, during the second stage of hot pressing in step three, ultrasonic waves with a frequency of 40 kHz are introduced, and the amplitude is controlled at 15-20 μm to promote the embedding depth of zeolite on the fiber surface.

[0021] Preferably, the rapid cooling and solidification process described in step four is carried out in a vacuum environment (vacuum degree ≤10Pa) to accelerate the propagation of microcracks.

[0022] Preferably, step five, ultraviolet irradiation treatment, specifically includes: using a UV-C light source with a wavelength of 254 nm and an irradiation dose of 30-40 mJ / cm². 2 This enhances the stability of surface cross-linking.

[0023] An antibacterial clothing fabric has a surface with microcracks of 0.2-0.5 μm depth and zeolite particles covering more than 80%.

[0024] Preferably, the antibacterial rate against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 25922) is ≥99% (GB / T 20944.3-2008), the repellency rate against house dust mites (Dermatophagoides farinae) is ≥95% (GB / T 24253-2009), and the performance degradation rate after 50 standard washes is <5%.

[0025] Compared with existing technologies, this invention provides an antibacterial clothing fabric and its processing technology, which has the following beneficial effects: The improved process of this invention brings significant beneficial effects through the synergistic effect of steps such as pretreatment, application of modified zeolite powder, stepwise hot pressing activation, rapid cooling curing, hot pressing-rapid cooling synergy, and addition of carboxymethyl chitosan quaternary ammonium salt: In terms of antibacterial performance, the antibacterial rate against Staphylococcus aureus and Escherichia coli is ≥99%, which is 14.2%-39.3% higher than that of the unoptimized process, and the performance decline rate after 50 washes is <5%, solving the problems of easy shedding and short-lived effect of antibacterial agents in traditional processes; In terms of mite-inhibiting performance, the dust mite repellency rate is ≥95%, which is 26.6%-41.2% higher than that of conventional processes, achieving an unexpectedly high mite-inhibiting effect; At the same time, the fabric cell survival rate is ≥95%, with excellent safety. Attached Figure Description

[0026] Figure 1 SEM image of the product prepared in Embodiment 1 of the present invention;

[0027] Figure 2 This is a TEM image of the zeolite-fiber interface of the present invention. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Figure 1 Images were acquired using a field emission scanning electron microscope (FE-SEM, model JEOL JSM-7800F) with an accelerating voltage of 5 kV, a working distance of approximately 8 mm, and a secondary electron probe (SEI mode). The sample surface was treated with metal sputtering (such as Pt or Au) to enhance conductivity. The image resolution reached several nanometers, and the scale bar was set to 2 μm. This parameter setting clearly revealed the distribution characteristics of microcracks (depth 0.2–0.5 μm) and nanoscale zeolite particles (particle size ≤100 nm) on the fiber surface.

[0030] Figure 2Images were acquired using a high-resolution transmission electron microscope (HRTEM, model FEITecnaiG2F30) with an accelerating voltage of 300 kV and a point resolution better than 0.2 nm. Samples were prepared by ultrathin sectioning (approximately 70 nm thick) and resin embedding. The zeolite-fiber interface section was then examined using focused ion beam (FIB). The images clearly show the embedding depth of zeolite particles within the fibers at approximately 1.0 μm, revealing a microcrack structure, which helps to elucidate the composite interface bonding mechanism and structural stability. The image scale bar was set to 100 nm.

[0031] The following are the reference standards and test procedures for the test items in this application:

[0032] Staphylococcus aureus / Escherichia coli inhibition rate: GB / T20944.3-2008 "Evaluation of antimicrobial properties of textiles - Part 3: Vibration method";

[0033] The antibacterial effect of textiles against Gram-positive bacteria (Staphylococcus aureus ATCC6538) and Gram-negative bacteria (Escherichia coli ATCC25922) was determined by the shaking method.

[0034] Dust mite repellency rate: GB / T24253-2009 "Evaluation of anti-mite performance of textiles";

[0035] The ability of textiles to repel house dust mites (Dermatophagoides farinae) was assessed using the repellency method.

[0036] Cell viability: ISO 10993-5:2009 "Biological evaluation of medical devices - Part 5: In vitro cytotoxicity tests";

[0037] The toxic effects of the fabric extract on L929 mouse fibroblasts were determined using the MTT assay.

[0038] Test methods and steps:

[0039] (a) Antibacterial rate test (oscillation method)

[0040] Sample preparation:

[0041] Cut the fabric into 5mm×5mm pieces, weigh 0.75g±0.05g as a sample, and wrap it in a sterile paper piece.

[0042] The control sample was a pure cotton fabric that had not undergone antibacterial treatment, and the treatment method was the same as above.

[0043] If it is necessary to test the performance after washing, pretreatment should be carried out according to the washing method of the color fastness tester for washing in GB / T20944.3-2008 (40℃±3℃, 0.2% detergent, 5 cycles).

[0044] Sterilization:

[0045] Place the sample and control sample in an autoclave and sterilize at 121℃ and 103kPa for 15 minutes.

[0046] Inoculation and culture:

[0047] Add 0.75 g of the sample / control sample and 70 mL of 0.03 mol / L PBS buffer (pH 7.4) to a 250 mL Erlenmeyer flask.

[0048] Inoculation concentration: 1×10 6 A suspension of Staphylococcus aureus or Escherichia coli at CFU / mL was incubated at 37°C with shaking at 150 rpm for 18 hours.

[0049] viable cell count:

[0050] The cultured bacterial suspension was serially diluted and spread onto nutrient agar plates. After incubation at 37°C for 24 hours, the colony forming units (CFU / mL) were counted.

[0051] (ii) Dust mite repellency test (repellency method)

[0052] Sample preparation:

[0053] Cut the fabric into 5cm diameter circles, with the control sample being untreated pure cotton fabric.

[0054] Each test group contains 3 test samples and 3 control samples.

[0055] Test setup:

[0056] The sample and control were placed at equal intervals around the perimeter of a 9cm diameter petri dish, and 0.05g of mite feed (a 1:1 mixture of yeast powder and wheat flour) was placed in the center.

[0057] Place (2000±200) live house dust mites in the center culture dish, cover with the adhesive plate assembly, and incubate in a constant temperature and humidity incubator (25±2℃, 75±5%RH) for 24 hours.

[0058] Counting and Calculation:

[0059] After the culture was completed, the number of surviving adult mites and nymphs in each culture dish was counted, and the repellency rate was calculated.

[0060] (III) Cell viability test (MTT method)

[0061] Preparation of extract:

[0062] Cut the fabric into 1cm pieces. 2 Fragments, 1.25cm 2Add DMEM medium containing 10% fetal bovine serum at a ratio of / mL and extract at 37°C for 24 hours.

[0063] The control extract was a blank culture medium, and the positive control was a 0.1% SDS solution.

[0064] Cell culture:

[0065] L929 cells were used at a rate of 5 × 10⁻⁶ 4 Cells / wells were seeded into 96-well plates and incubated at 37°C and 5% CO2 for 24 hours until adherence.

[0066] Discard the original culture medium, add 100 μL of extract, and continue culturing for 24 hours.

[0067] MTT staining:

[0068] Add 20 μL MTT solution (5 mg / mL) to each well, incubate at 37°C for 4 hours, and discard the supernatant.

[0069] Add 150 μL DMSO to dissolve formazan crystals, shake for 10 minutes, and then measure the absorbance (OD value) at 490 nm using an ELISA reader.

[0070] Calculation method:

[0071] Antibacterial rate:

[0072] Antibacterial rate (%) = (Number of viable bacteria in control sample - Number of viable bacteria in test sample) / Number of viable bacteria in control sample × 100%;

[0073] (The unit of viable bacteria count in the formula is CFU / mL).

[0074] Dust mite repellency rate:

[0075] Repellency rate (%) = (Number of live mites in control sample - Number of live mites in test sample) / Number of live mites in control sample × 100%;

[0076] (The number of live mites in the formula is the total number of mites after 24 hours of culture).

[0077] Cell viability:

[0078] Cell viability (%) = (OD value of test group / OD value of control group) × 100%;

[0079] (The control group was a blank culture medium group, and the OD value reflected the metabolic activity of live cells.)

[0080] The instruments and models used in the above tests are as follows: Autoclave (Xinhua Medical LMQ.C-50E) for sample sterilization; Constant temperature shaking incubator (Shanghai Boxun BSD-YX1400) for bacterial culture in the antibacterial test; Biosafety cabinet (Haier HR1300-IIA2) for colony counting; Colony counter (Hangzhou Aosheng XK97-A) for viable cell counting; Constant temperature and humidity chamber (Shanghai Yiheng BPS-250CH) for dust mite repellency test culture; Stereo microscope (Olympus SZX7) for dust mite counting; CO2 incubator (Thermo Fisher 3111) for cell culture. Cell culture; microplate reader (Thermo Fisher Multiskan FC) for cell viability absorbance detection; atomic force microscope (Brook Dimension Icon) for base fabric surface roughness analysis; scanning electron microscope (Hitachi SU8010) for zeolite chimerism and mite foot structure observation; X-ray photoelectron spectroscopy (Thermo Fisher K-Alpha+) for elemental bonding analysis; Fourier transform infrared spectroscopy (Brook TENSOR II) for cross-linking structure characterization; laser confocal microscope (Leica TCSSP8) for fabric surface roughness and mite attachment observation.

[0081] Example 1

[0082] A processing technology for an antibacterial clothing fabric specifically includes the following steps:

[0083] Step 1, Pretreatment: Immerse the cotton base fabric in a solution containing 0.5wt% sodium hydroxide, treat at 60℃ for 30 minutes, and wash with water until neutral.

[0084] Step 2, Conditioner Coating: The pretreated base fabric is immersed in a conditioner solution (solid content 10%), subjected to two dips and two grouting processes, with a liquid carry-over rate of 70%. The conditioner, by weight, comprises: 40 parts modified zeolite powder (particle size ≤100nm); 20 parts carboxymethyl chitosan quaternary ammonium salt (degree of substitution 0.85); 5 parts silane coupling agent KH-560; 10 parts polyethylene glycol diacrylate; and 100 parts deionized water. The modified zeolite powder is prepared by: activating natural zeolite powder with 0.1M hydrochloric acid, then refluxing it with 3-aminopropyltriethoxysilane in ethanol at a mass ratio of 5:1 for 2 hours to obtain aminated zeolite.

[0085] Step 3, Stepwise hot pressing activation: First stage: hot pressing at 80℃ and 0.5MPa pressure for 5 minutes to form a preliminary cross-linked network; Second stage: hot pressing at 120℃ and 1.2MPa pressure for 8 minutes to oriented the zeolite micropores onto the fiber surface.

[0086] Step 4, rapid cooling and curing: Immediately transfer the fabric into a -10℃ cold trap and maintain it for 10 minutes to induce the formation of surface microcracks.

[0087] Step 5, Post-treatment: Rinse with 50℃ warm water for 10 minutes, then dry at 80℃.

[0088] Example 2

[0089] A processing technology for an antibacterial clothing fabric specifically includes the following steps:

[0090] Step 1, Pretreatment: Immerse the cotton base fabric in a solution containing 1.75wt% sodium hydroxide, treat at 60℃ for 30 minutes, and wash with water until neutral.

[0091] Step 2, Conditioner Coating: The pretreated base fabric is immersed in a conditioner solution (solid content 12.5%), subjected to two dips and two grouting processes, with a liquid carry-over rate of 75%. The conditioner, by weight, comprises: 50 parts modified zeolite powder (particle size ≤100nm); 25 parts carboxymethyl chitosan quaternary ammonium salt (degree of substitution 0.9); 7.5 parts silane coupling agent KH-560; 12.5 parts polyethylene glycol diacrylate; and 110 parts deionized water. The modified zeolite powder is prepared in the same manner as in Example 1.

[0092] Step 3, Stepwise hot pressing activation: First stage: hot pressing at 85℃ and 0.5MPa pressure for 5 minutes to form a preliminary cross-linked network; Second stage: hot pressing at 125℃ and 1.35MPa pressure for 8 minutes, while simultaneously introducing ultrasonic waves at a frequency of 40kHz with an amplitude controlled at 17.5μm, so that the zeolite micropores are oriented and embedded on the fiber surface.

[0093] Step 4, rapid cooling and curing: Immediately transfer the fabric into a -10℃ cold trap and maintain it in a vacuum environment of 5Pa for 10 minutes to induce the formation of surface microcracks.

[0094] Step 5, Post-treatment: Rinse with 50℃ warm water for 10 minutes, then irradiate with a UV-C light source at a wavelength of 254nm and a dose of 35mJ / cm². 2 It is then subjected to ultraviolet irradiation treatment and dried at 80°C.

[0095] Example 3

[0096] A processing technology for an antibacterial clothing fabric specifically includes the following steps:

[0097] Step 1, Pretreatment: Immerse the cotton base fabric in a solution containing 3wt% sodium hydroxide, treat at 60℃ for 30 minutes, and wash with water until neutral.

[0098] Step 2, Conditioner Coating: The pretreated base fabric is immersed in a conditioner solution (solid content 15%), subjected to two dips and two grouting processes, with a liquid carry-over rate of 80%. The conditioner, by weight, comprises: 60 parts modified zeolite powder (particle size ≤ 100 nm); 30 parts carboxymethyl chitosan quaternary ammonium salt (degree of substitution 0.95); 10 parts silane coupling agent KH-560; 15 parts polyethylene glycol diacrylate; and 120 parts deionized water. The modified zeolite powder is prepared in the same manner as in Example 1.

[0099] Step 3, Stepwise hot pressing activation: First stage: hot pressing at 90℃ and 0.5MPa pressure for 5 minutes to form a preliminary cross-linked network; Second stage: hot pressing at 130℃ and 1.5MPa pressure for 8 minutes, and introducing ultrasonic waves at a frequency of 40kHz with the amplitude controlled at 20μm to make the zeolite micropores oriented and embedded on the fiber surface.

[0100] Step 4, rapid cooling and curing: Immediately transfer the fabric into a -10℃ cold trap and maintain it in a vacuum environment of 10Pa for 10 minutes to induce the formation of surface microcracks.

[0101] Step 5, Post-treatment: Rinse with 50℃ warm water for 10 minutes, then irradiate with a UV-C light source at a wavelength of 254nm and a dose of 40mJ / cm². 2 It is then subjected to ultraviolet irradiation treatment and dried at 80°C.

[0102] Example 4

[0103] A processing technology for an antibacterial clothing fabric specifically includes the following steps:

[0104] Step 1, Pretreatment: Immerse the cotton base fabric in a solution containing 2wt% sodium hydroxide, treat at 60℃ for 30 minutes, and wash with water until neutral.

[0105] Step 2, Conditioner Coating: The pretreated base fabric is immersed in a conditioner solution (solid content 13.5%), subjected to two dips and two grouting processes, with a liquid carry-over rate of 80%. The conditioner, by weight, comprises: 55 parts modified zeolite powder (particle size ≤100nm); 28 parts carboxymethyl chitosan quaternary ammonium salt (degree of substitution 0.95); 8 parts silane coupling agent KH-560; 13 parts polyethylene glycol diacrylate; and 110 parts deionized water. The modified zeolite powder is prepared in the same manner as in Example 1.

[0106] Step 3, Stepwise hot pressing activation: First stage: hot pressing at 87℃ and 0.5MPa pressure for 5 minutes to form a preliminary cross-linked network; Second stage: hot pressing at 128℃ and 1.5MPa pressure for 8 minutes, and introducing ultrasonic waves at a frequency of 40kHz with an amplitude controlled at 20μm to directionally embed the zeolite micropores into the fiber surface.

[0107] Step 4, rapid cooling and curing: Immediately transfer the fabric into a -10℃ cold trap and maintain it in a vacuum environment of 10Pa for 10 minutes to induce the formation of surface microcracks.

[0108] Step 5, Post-treatment: Rinse with 50℃ warm water for 10 minutes, then irradiate with a UV-C light source at a wavelength of 254nm and a dose of 40mJ / cm². 2 It is then subjected to ultraviolet irradiation treatment and dried at 80°C.

[0109] Comparative Example 1

[0110] No pretreatment step was performed; the remaining steps are the same as in Example 2.

[0111] Comparative Example 2

[0112] Unmodified natural zeolite powder was used, and the remaining steps were the same as in Example 2.

[0113] Comparative Example 3

[0114] The rapid cooling and curing step was not performed; the remaining steps were the same as in Example 2.

[0115] Comparative Example 4

[0116] The stepped hot-press activation only performs the first stage and does not perform the second stage. The remaining steps are the same as in Example 2.

[0117] Comparative Example 5

[0118] No carboxymethyl chitosan quaternary ammonium salt was added to the regulator; the remaining steps were the same as in Example 2.

[0119] Comparative Example 6

[0120] The hot pressing-rapid cooling process is replaced with conventional heat setting (drying at 100°C), and the remaining steps are the same as in Example 2.

[0121] Comparative Example 7

[0122] Purchase commercially available antibacterial fabrics.

[0123] Performance tests were conducted on the products of the examples and comparative examples. The test items included Staphylococcus aureus inhibition rate (%), Escherichia coli inhibition rate (%), dust mite repellency rate (%), and cell survival rate (%). The specific test results are detailed in Table 1.

[0124] Table 1

[0125]

[0126] The test results show that the antibacterial performance of the embodiment is significantly better than that of the comparative example. This is because in the process of the present invention, the zeolite micropores adsorb microorganisms through capillary action, and the amino groups on their surface form an ionic bond network with the chitosan quaternary ammonium salt, continuously releasing cations to destroy the microbial cell membrane.

[0127] In Example 2, the inhibition rates of Staphylococcus aureus and Escherichia coli using modified zeolite powder were significantly higher than those in Comparative Example 2, which used unmodified natural zeolite powder. This is because the modified zeolite powder has an aminated surface, which allows it to better bind with carboxymethyl chitosan quaternary ammonium salt, forming a stable ionic bond network and enhancing the antibacterial effect.

[0128] Example 2, which added carboxymethyl chitosan quaternary ammonium salt, showed a significantly higher antibacterial rate than Comparative Example 5, which did not add carboxymethyl chitosan quaternary ammonium salt. This indicates that carboxymethyl chitosan quaternary ammonium salt plays an important role in the antibacterial process, and the cations it releases can effectively destroy the cell membrane of microorganisms.

[0129] The dust mite repellency rate of the embodiment was significantly higher than that of the comparative example because the hot-pressing-rapid cooling process creates a specific roughness (Ra=0.8-1.2μm) on the fabric surface, which destroys the attachment structure of the mite's feet.

[0130] Example 2, which uses a hot-press-rapid cooling process, shows a significantly higher dust mite repellency rate than Comparative Example 6, which uses conventional heat setting. This is because the specific roughness and microcrack structure created by the hot-press-rapid cooling process effectively disrupts the attachment and nerve conduction of mites.

[0131] Example 2, which underwent rapid cooling and curing, showed a higher dust mite repellency rate than Comparative Example 3, which did not undergo rapid cooling and curing. This indicates that the microcrack structure induced by rapid cooling and curing has a significant impact on the mite-inhibiting performance. The microcracks increase the specific surface area, and the aggregated cations can better interfere with the nerve conduction of mites.

[0132] The antibacterial rates of Staphylococcus aureus and Escherichia coli in Example 2 were significantly higher than those in Comparative Example 7, and the dust mite repellency rate was also significantly higher. This indicates that the fabric prepared by the processing technology of this invention is superior to commercially available ordinary antibacterial fabrics in both antibacterial and anti-mite properties.

[0133] As can be seen from the above test results and analysis, the processing technology of the present invention, through the synergistic effect of pretreatment, coating of specific regulators, step-by-step hot pressing activation, and rapid cooling curing, enables the prepared fabric to have excellent antibacterial and anti-mite properties.

[0134] In terms of antibacterial properties, the zeolite micropores adsorb microorganisms and form an ionic bond network with chitosan quaternary ammonium salt to continuously release cations that destroy microbial cell membranes. The microcracks induced by rapid cooling increase the specific surface area and enhance physical adsorption. These mechanisms work together to make the antibacterial effect significantly better than the comparative sample and commercially available fabrics, demonstrating innovation.

[0135] The mite-inhibiting property was obtained unexpectedly. The specific roughness and microcrack structure formed by the hot-pressing-rapid-cooling process, as well as the cations aggregated within the microcracks, together achieved a good mite-inhibiting effect. This property is difficult to achieve in traditional processes and commercially available fabrics, further proving the inventiveness of this invention.

[0136] Meanwhile, the cell survival rate in each embodiment is above the standard, indicating that the fabric is highly safe for the human body.

[0137] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A processing technology for antibacterial clothing fabric, characterized in that: Includes the following steps: Step 1, Pretreatment: Immerse the cotton base fabric in a solution containing 0.5-3wt% sodium hydroxide, treat at 60℃ for 30 minutes, and wash with water until neutral; Step 2, Conditioner Coating: Immerse the pretreated base fabric in a conditioner solution with a solid content of 10-15%, perform two dips and two grouting, with a liquid retention rate of 70-80%; The regulator comprises, by weight, the following: 40-60 parts of modified zeolite powder, particle size ≤100nm; 20-30 parts of carboxymethyl chitosan quaternary ammonium salt; 5-10 parts of silane coupling agent KH-560; 10-15 parts of polyethylene glycol diacrylate; 100-120 parts deionized water; Step 3, Stepped hot pressing activation: First stage: Hot pressing at 80-90℃ and 0.5MPa pressure for 5 minutes to form a preliminary cross-linked network; The second stage: heating to 120-130℃ and hot pressing at 1.2-1.5MPa for 8 minutes to oriented and embed the zeolite micropores into the fiber surface; Step 4, rapid cooling and curing: Immediately transfer the fabric into a -10℃ cold trap and maintain it for 10 minutes to induce the formation of surface microcracks; Step 5, Post-treatment: Rinse in 50℃ warm water for 10 minutes, then treat with ultraviolet radiation, and dry at 80℃ to obtain antibacterial fabric; The modified zeolite powder is prepared as follows: Natural zeolite powder was activated with 0.1M hydrochloric acid and then refluxed with 3-aminopropyltriethoxysilane in ethanol at a mass ratio of 5:1 for 2 hours to obtain aminated zeolite.

2. The processing technology of an antibacterial clothing fabric according to claim 1, characterized in that: In the regulator described in step two, the degree of substitution of carboxymethyl chitosan quaternary ammonium salt is ≥0.85, and its quaternary ammonium groups form ionic bonds with the amino groups on the zeolite surface through hot pressing in step three.

3. The processing technology of an antibacterial clothing fabric according to claim 1, characterized in that: In step three, during the second stage of hot pressing, ultrasonic waves with a frequency of 40kHz are introduced, with the amplitude controlled at 15-20μm, to promote the intercalation depth of zeolite on the fiber surface.

4. The processing technology of an antibacterial clothing fabric according to claim 1, characterized in that: The rapid cooling and curing process described in step four is carried out in a vacuum environment with a vacuum degree ≤10Pa, which accelerates the propagation of microcracks.

5. The processing technology of an antibacterial clothing fabric according to claim 1, characterized in that: Step five, ultraviolet irradiation treatment, specifically includes: using a UV-C light source with a wavelength of 254nm and an irradiation dose of 30-40mJ / cm². 2 This enhances the stability of surface cross-linking.

6. An antibacterial clothing fabric, characterized in that: Prepared by the process described in any one of claims 1-5, the surface of which has a microcrack structure with a depth of 0.2-0.5 μm, and the zeolite particle coverage is more than 80%.

7. The fabric as described in claim 6, characterized in that: It has an antibacterial rate of ≥99% against Staphylococcus aureus and Escherichia coli, a repellency rate of ≥95% against dust mites, and a performance degradation rate of <5% after 50 standard washes.

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