Antibacterial and breathable cotton yarn textile fabric for mothers and infants and preparation method of antibacterial and breathable cotton yarn textile fabric

Abstract

The invention discloses an antibacterial and breathable cotton yarn textile fabric for mothers and infants and a preparation method of the antibacterial and breathable cotton yarn textile fabric, and relates to the technical field of textile fabrics, the antibacterial and breathable cotton yarn textile fabric comprises an inner woven layer, a middle woven layer and an outer woven layer, the inner woven layer is made of 80S fine-count cotton yarn and combed cotton which are subjected to enzyme treatment and microcapsule coating, and double-layer plain weave and mesh jacquard weave are adopted for tight weaving; the weaving density is 120 yarns per square centimeter, the middle weaving layer adopts 40S cotton yarns and adopts a loose honeycomb weave structure for weaving, the weaving density is 60 yarns per square centimeter, the outer weaving layer adopts 50S cotton yarns and adopts twill weave for weaving, the weaving density is 90 yarns per square centimeter, the cotton yarns adopt Xinjiang long stapled cotton, and the cotton yarns adopt cotton yarns and twill weave. And the fiber length is 35mm. By changing the weaving density and the multi-layer weaving structure and other means, perfect combination of antibacterial performance and air permeability is achieved, double-layer plain weave and mesh jacquard weaving are achieved, the surface layer is compact and antifouling, and air circulation is promoted through the inner-layer mesh structure.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, in particular to an antibacterial and breathable cotton yarn textile fabric for mothers and infants and a preparation method thereof. Background Art

[0002] Although traditional pure cotton fabrics have good skin-friendliness, they do not have antibacterial properties. They are easily contaminated by bacteria during use, and the antibacterial effect is difficult to maintain after washing. Fabrics with added antibacterial agents have problems such as uneven distribution of antibacterial agents and easy shedding. The antibacterial effect is unstable, and it cannot take into account both antibacterial and breathable properties at the same time, which has certain defects.

[0003] The defects of existing maternal and infant cotton yarn textile fabrics are: 1. In the application document CN116856164A, the antibacterial property of the fabric is mainly improved by adding nano-silver ions, but it does not take into account that the existing textile fabrics cannot take into account both antibacterial properties and breathability; 2. Patent document CN217455153U mainly reduces the probability of bacterial growth by improving the air permeability of the fabric, but does not take into account the problem that the antibacterial effect of existing textile fabrics will be greatly reduced after long-term use; 3. Patent document CN214563412U mainly improves the air permeability of the fabric by providing support fibers, without considering the poor durability and stability of the antibacterial properties of existing textile fabrics; 4. In patent document CN118560124B, the antibacterial, UV resistance and breathability of knitted fabrics are improved mainly through the synergistic effect of various groups of antibacterial and breathable enhancement components. However, it does not take into account that existing textile fabrics have poor feel and softness while taking into account both breathability and antibacterial properties. Summary of the Invention

[0004] The object of the present invention is to provide an antibacterial and breathable cotton yarn textile fabric for maternal and infant use and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an antibacterial and breathable cotton yarn textile fabric for mothers and babies, comprising an inner woven layer, a middle woven layer and an outer woven layer, the inner woven layer using 80S fine cotton yarn and combed cotton that have been enzyme-treated and microcapsule-coated, and is tightly woven using double-layer plain weave and mesh jacquard, with a weaving density of 120 yarns per square centimeter, the middle woven layer using 40S cotton yarn, and being woven using a loose honeycomb structure, with a weaving density of 60 yarns per square centimeter, the outer woven layer using 50S cotton yarn, and being woven using a twill weave, with a weaving density of 90 yarns per square centimeter, wherein the cotton yarn is selected from Xinjiang long-staple cotton with a fiber length of 35 mm.

[0006] Preferably, the preparation method of the cotton yarn textile fabric for maternal and infant use is as follows: S1. First, select Xinjiang long-staple cotton and perform preliminary cleaning to remove impurities and short fibers; S2, preparing antimicrobial microcapsules, then uniformly dispersing the prepared antimicrobial microcapsules in an environmentally friendly solvent, using a padding process to attach the antimicrobial microcapsules to cotton yarn, and then drying at low temperature; S3, immersing the dried cotton yarn in a silver ion solution, and achieving silver ion loading by controlling the solution concentration, immersion time and temperature; S4, then the cotton yarn loaded with silver ions is placed in the prepared enzyme solution with a bath ratio of 1:20, and treated at a temperature of 50°C for 90 minutes. During the treatment process, it is continuously stirred. After the treatment is completed, the cotton yarn is rinsed with clean water to remove residual enzyme solution and impurities; S5. Using a computerized knitting machine, knit the inner layer, the middle layer, and the outer layer of fabric respectively according to the designed knitting density and needle method to obtain an inner knitted layer, a middle knitted layer, and an outer knitted layer; S6, compounding the woven three-layer fabric together through a solvent-free lamination technology; S7. Wash the composite fabric to remove residual chemicals and soften it; S8. Finally, the softened fabric is shaped.

[0007] Preferably, in S1, it further includes: S1-1, opening and cleaning the long-staple cotton raw materials, removing impurities and cotton seeds in the cotton by a cotton cleaning machine, and forming the cotton into loose cotton rolls; S1-2, combing the cleaned cotton lap further to comb the fibers into single fibers, remove short fibers and fine impurities, and forming slivers using a carding machine; S1-3. Select multiple cotton slivers and combine them together, and then perform drafting and twisting operations on the cotton slivers to make 40S, 50S and 80S cotton yarns respectively.

[0008] Preferably, in S2, the preparation method of the antibacterial agent microcapsules is as follows: S2-1. Gelatin and gum arabic were prepared into aqueous solutions with mass fractions of 2% and 3%, respectively. The solutions were stirred at 50°C, mixed in a ratio of 1:1, and the pH value was adjusted to 4.5 to form a composite colloidal solution. Tea tree essential oil and thyme essential oil were then mixed in a ratio of 1:1, Tween-80 was added, and the mixed essential oil was slowly dripped into the composite colloidal solution at a stirring speed of 1300 r / min to form a stable O / W emulsion. S2-2. The emulsion was then cooled to 15°C, and a 10% by mass sodium sulfate solution was slowly added. The stirring was continued for 60 minutes, and then a glutaraldehyde solution was added for solidification treatment. The solidification time was 2 hours. Finally, the emulsion was filtered and washed to obtain pure antibacterial agent microcapsules.

[0009] Preferably, in S3, the dried cotton yarn is placed in a silver nitrate solution with a concentration of 0.1 g / L, immersed at 45° C. for 50 minutes, and then washed with water to remove unadsorbed silver ions.

[0010] Preferably, in S4, the enzyme solution is prepared as follows: Select neutral protease and dissolve it in a buffer solution with a pH value of 7 at a concentration of 2g / L. Add appropriate amounts of penetrant and softener and stir thoroughly.

[0011] Preferably, the buffer solution is a phosphate buffer solution, the penetrant is JFC penetrant, and the softener is an ester-based quaternary ammonium salt softener.

[0012] Preferably, in S5, the weaving method is as follows: S5-1. Inner layer knitting: 80S fine cotton yarn and combed cotton are installed on the creel of the computer knitting machine. According to the stitch requirements of double-layer plain weave and mesh jacquard, the computer knitting machine program is set to start knitting the inner knitting layer. During the knitting process, the knitting density is monitored in real time to ensure that the requirement of 120 yarns per square centimeter is met. S5-2, Middle Layer Knitting: Replace the yarn and install 40S cotton yarn on the creel. Select a loose honeycomb structure. Reset the knitting program of the computer knitting machine and start knitting the middle layer. Also monitor the knitting density in real time to ensure that 60 yarns per square centimeter are achieved. S5-3, outer layer knitting: replace the yarn again, install 50S cotton yarn, set the computer knitting machine program according to the twill stitch requirements, knit the outer knitting layer, and monitor the knitting density to reach 90 yarns per square centimeter.

[0013] Preferably, in S7, the method further includes: S7-1. Wash the composite fabric in clean water to remove surface impurities and residual chemicals. The washing temperature is 50°C and the washing time is 30 minutes. S7-2. Soak the washed fabric in a solution containing softener for 15 minutes. The softener concentration is 3g / L. After soaking, dehydrate and dry.

[0014] Preferably, in S8, a heat setting device is used to set the softened fabric, with the temperature set to 160° C. and the time being 5 minutes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention achieves different functions of each braided layer through different yarn specifications and braiding structures. The inner braided layer is tightly woven and uses a special needle method to ensure comfortable contact with the skin and continuous release of antibacterial agents. The loose honeycomb structure of the middle braided layer forms large-pore channels, greatly improving the overall breathability of the fabric. The twill weave of the outer braided layer enhances the wear resistance and anti-pilling performance of the fabric, while also protecting the internal structure.

[0016] 2. The present invention encapsulates natural antibacterial agents in microcapsules. During use, with friction and the passage of time, the microcapsules slowly break and continuously release antibacterial ingredients, achieving long-term antibacterial effects without irritating the skin of mothers and babies.

[0017] 3. The present invention further improves the antibacterial property of the fabric through silver ion loading technology. Silver ions have a strong inhibitory and killing effect on common harmful bacteria such as Escherichia coli and Staphylococcus aureus, and work synergistically with the antibacterial agent microcapsules in the fabric to expand the antibacterial spectrum and improve the durability and stability of the antibacterial effect.

[0018] 4. The present invention uses the neutral protease in the enzyme solution to decompose impurities and part of the protein on the surface of the cotton yarn, making the fiber smoother and softer, reducing the entanglement between fibers, thereby improving the feel and softness of the fabric. At the same time, after the impurities on the surface of the fabric are removed and the fiber structure is optimized by enzyme treatment, the gaps between the fibers are increased, the air circulation is enhanced, and the breathability of the fabric is improved. In addition, the enzyme treatment process can promote the further uniform distribution of silver ions. At the same time, the enzyme treatment improves the fiber structure without affecting the loaded silver ions. DETAILED DESCRIPTION

[0019] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention. Example

[0020] The preparation method of cotton yarn textile fabric for maternal and infant use is as follows: S1. First, long-staple cotton from Xinjiang is selected and opened and cleaned. Impurities and cotton seeds are removed from the cotton using a cotton cleaning machine to form loose laps. The cleaned laps are then combed to form single fibers, and short fibers and fine impurities are removed. Slivers are then produced using a carding machine. Multiple slivers are then combined and drawn, and the drawn slivers are drafted and twisted to produce 40S, 50S, and 80S cotton yarns, respectively. S2, gelatin and gum arabic are respectively mixed with the aqueous solution of mass fraction being 2% and 3%, stir at a temperature of 50 ℃, according to the ratio of 1: 1, two aqueous solutions are mixed, regulate pH value to 4.5, form composite colloid solution, then tea tree essential oil and thyme essential oil are mixed according to the ratio of 1: 1, add Tween-80, be that under stirring speed 1300r / min, mixed essential oil is slowly dripped in composite colloid solution, form stable O / W type emulsion, then emulsion is cooled to 15 ℃, slowly adding mass fraction is 10% sodium sulfate solution, continue to stir 60min, then add glutaraldehyde solution and carry out solidification treatment, solidification time is 2h, finally filter and wash operation, obtain pure antibacterial agent microcapsules, then the antibacterial agent microcapsules for preparing are uniformly dispersed in environmentally friendly solvent, adopt padding process to make antibacterial agent microcapsules be attached on cotton yarn, then low temperature drying; S3, immersing the dried cotton yarn in a silver ion solution, placing the dried cotton yarn in a silver nitrate solution with a concentration of 0.1 g / L, immersing it at 45° C. for 50 minutes to achieve silver ion loading, and then washing with water to remove unadsorbed silver ions; S4, then prepare enzyme solution, select neutral protease, according to the concentration of 2g / L, it is dissolved in the phosphate buffer solution of 7 whose pH value is, add appropriate amount of JFC penetrant and ester group quaternary ammonium salt softener, stir well, then load the cotton yarn with silver ion and put it into the configured enzyme solution, bath ratio is 1:20, at a temperature of 50 ℃, process 90min, in the processing process, constantly stir, after processing, rinse the cotton yarn with clean water to remove residual enzyme solution and impurities; S5. Install 80S cotton yarn and combed cotton on the creel of a computer knitting machine. Set the program of the computer knitting machine according to the stitch requirements of double-layer plain weave and mesh jacquard and begin knitting the inner braided layer. During the knitting process, monitor the knitting density in real time to ensure that the requirement of 120 yarns per square centimeter is met. Middle layer weaving: Replace the yarn, install 40S cotton yarn on the creel, select a loose honeycomb structure, reset the knitting program of the computer knitting machine, and start weaving the middle layer. Also monitor the weaving density in real time to ensure that 60 yarns per square centimeter are reached; Outer layer knitting: Replace the yarn again, install 50S cotton yarn, set the computer knitting machine program according to the twill stitch requirements, knit the outer knitting layer, and monitor the knitting density to achieve 90 yarns per square centimeter; S6, compounding the woven three-layer fabric together through a solvent-free lamination technology; S7. Wash the composite fabric in clean water to remove surface impurities and residual chemicals at a washing temperature of 50° C. for 30 minutes. Then, soak the washed fabric in a solution containing a softener at a concentration of 3 g / L for 15 minutes. After soaking, dehydrate and air dry. S8. Use heat setting equipment to set the softened fabric, set the temperature to 160°C, and the time to 5 minutes.

[0021] Furthermore, in S1, the Xinjiang long-staple cotton raw material is put into the cotton cleaning machine, and the drum speed of the cotton cleaning machine is set to 300-400r / min. The impurities, cotton seeds and other large particles in the cotton are removed by the action of the beater and the dust stick, so that the cotton is initially formed into loose and uniform cotton rolls, each roll weighing about 5-8kg. Then, the cotton rolls after cotton cleaning are fed into the cotton carding machine, and the cylinder speed of the cotton carding machine is adjusted to 300-350r / min and the cover speed is 100-120mm / min. The cotton carding machine combs the fibers in the cotton rolls into a single fiber state, removes short fibers and fine impurities, and makes uniform cotton strips. The quantitative weight of the cotton strips is controlled at 5-6g / 5m, and then 6-8 The cotton strips are put into the drawing frame and combined together, and the drafting multiple of the drawing frame is set to 6-8 times to further improve the uniformity of the cotton strips. The quantitative amount of the cotton strips after drawing is 4-5g / 5m. The cotton strips after drawing are fed into the roving frame for drawing and twisting operations. The drafting multiple of the roving frame is set to 8-10 times, and the twist coefficient is controlled at 70-80. 40S, 50S and 80S rovings are made respectively. Then the rovings are installed on the spinning frame, and the spindle speed of the spinning frame is adjusted to 12000-15000r / min. Through drawing and twisting, 40S, 50S and 80S cotton yarns are made respectively, and the CV value of the cotton yarn uniformity is controlled at 12%-14%.

[0022] In S2, 20 g of gelatin and 30 g of gum arabic were weighed and placed in two beakers. 1000 mL of distilled water was added to each beaker and stirred in a 50°C water bath to dissolve the mixture. A 2% gelatin aqueous solution and a 3% gum arabic aqueous solution were prepared. 50 mL of tea tree essential oil and thyme essential oil were weighed and placed in another beaker, mixed thoroughly, and 10-15 mL of Tween-80 was added as an emulsifier. Preparation of emulsion: Pour the gelatin aqueous solution and the gum arabic aqueous solution into a large beaker in a ratio of 1:1, stir evenly with a glass rod, and adjust the pH value to 4.5. Slowly drip the mixed essential oil into the composite colloid solution at a stirring speed of 1300r / min, and continue stirring for 30-40min to form a stable O / W type emulsion. Then transfer the emulsion to a large container, cool it to 15°C, and slowly add 100-150mL of 10% sodium sulfate solution by mass. Continue stirring for 60min, and then add 50-80mL of glutaraldehyde solution for solidification treatment. The solidification time is 2h. After solidification, filter it through a filter device. , collect the microcapsules, and then wash them with distilled water for 3-5 times to remove residual chemical reagents to obtain pure antibacterial agent microcapsules. The prepared antibacterial agent microcapsules are evenly dispersed in an environmentally friendly solvent such as an ethanol-water mixed solution with a volume ratio of 1:1 to prepare a solution with a microcapsule concentration of 10-15g / L. The cotton yarn is immersed in the solution using a padding process for 2-3 minutes, and then dried at a low temperature (60-70℃) for 30-40 minutes to adhere the antibacterial agent microcapsules to the cotton yarn and dry it.

[0023] In S3, the dried cotton yarn is placed in a clean container, and a silver nitrate solution with a concentration of 0.1 g / L is added. The amount of solution is appropriate for completely immersing the cotton yarn. The container is placed in a constant temperature water bath at 45°C and immersed for 50 minutes. During this period, it is gently stirred every 10-15 minutes to allow the silver ions to be fully adsorbed on the cotton yarn. After the immersion is completed, the cotton yarn is taken out and rinsed with plenty of clean water 3-5 times to remove the unadsorbed silver ions.

[0024] In S4, 20g of neutral protease is weighed and placed in a clean container. 10L of phosphate buffer solution with a pH of 7 is added and stirred to dissolve. 5-10g of JFC penetrant and 10-15g of ester-based quaternary ammonium softener are then added and stirred thoroughly to prepare an enzyme solution. Silver ion-loaded cotton yarn is placed in the prepared enzyme solution at a bath ratio of 1:20 and treated in a constant temperature water bath at 50°C for 90min. During the treatment, a stirrer is used to continuously stir at a speed of 100-150r / min. After the treatment, the cotton yarn is rinsed with clean water 3-5 times to remove residual enzyme solution and impurities. JFC penetrant can reduce the surface tension of water, allowing the enzyme solution to quickly penetrate into the cotton yarn fibers, improving the efficiency and uniformity of enzyme treatment. Amino silicone oil softener can initially impart a certain softness to the cotton yarn during the enzyme treatment process. It has good compatibility with the enzyme solution and other additives and does not affect the enzyme activity and treatment effect.

[0025] In S5, 80S cotton yarn and combed cotton yarn were installed on the creel of the computer knitting machine. The computer knitting machine was programmed according to the stitch requirements of double-layer plain weave and mesh jacquard. During the knitting process, the knitting density was monitored in real time, and the knitting density was measured every 10-15 cm to ensure that it met the requirement of 120 yarns per square centimeter. If the knitting density did not meet the requirement, the computer knitting machine parameters were adjusted in a timely manner. The yarn was then replaced. 40S cotton yarn was installed on the creel, and a loose honeycomb structure was selected. The knitting program of the computer knitting machine was reset. The knitting density was also monitored in real time, and the same measurement frequency as for the inner knitting layer was used to ensure that it reached 60 yarns per square centimeter. During the knitting process, the yarn tension was uniform to avoid inconsistent fabric tightness. Finally, the yarn was replaced again, and 50S cotton yarn was installed. The computer knitting machine was programmed according to the stitch requirements of twill weave to knit the outer knitting layer, and the knitting density was monitored to achieve 90 yarns per square centimeter. After knitting, the fabric was preliminarily inspected for problems such as missed stitches and pattern errors.

[0026] In S6, the woven three-layer fabric is placed on the conveyor belt of the solvent-free laminating equipment in sequence, the lamination temperature is set to 120-130°C, and the pressure is set to 0.5-1MPa. The three-layer fabric is compounded together by the laminating equipment. The compounded fabric must be flat and free of bubbles, and the layers must be tightly bonded.

[0027] In S7, the composite fabric is placed in a washing machine, and sufficient clean water is added. The washing temperature is 50°C and the washing time is 30 minutes. During the washing process, a small amount of mild detergent, such as 0.5-1g / L non-ionic detergent, can be appropriately added to remove surface impurities and residual chemicals. After washing, the fabric is taken out and rinsed with clean water.

[0028] In S8, the washed fabric is placed in a solution containing a softener and soaked for 15 minutes. The concentration of the softener is 3 g / L. After the soaking is completed, the fabric is placed in a dehydrator for dehydration and then dried in a cool and ventilated place.

[0029] Through different yarn specifications and weaving structures, each woven layer is given different functions. The inner woven layer is tightly woven and uses a special needle method to ensure the comfort of contact with the skin and the continuous release of antibacterial agents. The loose honeycomb structure of the middle woven layer forms a large-pore channel, which greatly improves the overall breathability of the fabric. The twill weave of the outer woven layer enhances the wear resistance and anti-pilling performance of the fabric, while also protecting the internal structure.

[0030] The performance test results are as follows: Test items Detection data Air permeability (mm / s) 280-320 Antibacterial rate (against Escherichia coli) 98.5 Antibacterial rate (against Staphylococcus aureus) 97 Antibacterial rate (against Candida albicans) 96.5 Antibacterial persistence (antibacterial rate after washing 20 times) Still maintains at 90%-92% Softness (feel rating, 1-10 points) 8-9 Breaking strength (warp / N) 300-330N Breaking strength (weft direction / N) 280-300N Wear resistance (surface condition after 5000 frictions) Slightly fuzzy, no obvious damage Formaldehyde content (mg / kg) ＜10 pH value 6.0-6.5 Comparative Example 1, A single braided structure is used, and the remaining steps are the same as those in the first embodiment.

[0031] Comparative Example 2, Without using microcapsules to encapsulate the antibacterial agent, the antibacterial fiber and the natural cotton fiber are directly blended in a certain proportion, and the blended yarn is produced through a spinning process. The remaining steps are the same as those in Example 1.

[0032] Comparative Example 3: The cotton yarn was not subjected to silver ion loading operation, and the remaining steps were the same as those in Example 1.

[0033] Comparative Example 4: The cotton yarn was not subjected to enzyme treatment, and the remaining steps were the same as those in Example 1.

[0034] Experimental example, Textile fabrics were prepared using the methods of Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4, respectively, and the prepared fabrics were divided into Sample 1, Sample 2, Sample 3, Sample 4 and Sample 5 in sequence.

[0035] Antibacterial performance testing: Taking E. coli detection as an example, prepare nutrient agar medium, weigh 28g nutrient agar powder and add it to 1L distilled water, heat and stir until completely dissolved, divide the medium into conical flasks, seal with kraft paper and cotton rope, and sterilize in a high pressure sterilizer at 121℃ for 20min.

[0036] Preparation of bacterial suspension: A small amount of E. coli cells were picked from the slant of the strain and inoculated into a test tube containing 5 mL of nutrient broth medium. The test tube was placed in a constant temperature incubator at 37 ° C for 20 h to obtain a bacterial suspension. The bacterial suspension was diluted with physiological saline to a concentration of 1*10 6 CFU / mL.

[0037] Inoculation and culture: When the sterilized culture medium has cooled to 45°C, pour it into a 90 mm diameter culture dish, 20 mL per dish, so that it evenly covers the bottom of the culture dish. After the culture medium solidifies, use a sterile pipette to draw up 0.1 mL of the diluted bacterial solution and evenly spread it on the surface of the culture medium.

[0038] Cut sample 1, sample 2, sample 3, sample 4 and sample 5 into circular fabric specimens with a diameter of 6 mm, carefully place them on the surface of the inoculated culture medium with tweezers, place 4 specimens in each culture dish, and then invert the culture dish and place it in a 37°C constant temperature incubator for 24 hours.

[0039] After the incubation, observe whether a transparent inhibition zone appears around the sample and measure the diameter of the inhibition zone with a vernier caliper. Measure each inhibition zone three times and take the average value.

[0040] Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 14.5mm 14.32mm 9.73mm 11.2mm 14.15mm Cut the fabric into small pieces of about 1g, prepare 3 samples for each group, place the samples in a 250mL Erlenmeyer flask filled with 70mL of normal saline containing 0.03% Tween-80, add 1mL of diluted bacterial solution, and place the Erlenmeyer flask in a constant temperature shaking incubator at 37℃ and 150r / min for shaking culture for 18h. After the culture is completed, draw 1mL of bacterial solution from each Erlenmeyer flask and make a 10-fold serial dilution with normal saline. Take 0.1mL of bacterial solution of different dilutions and spread it on nutrient agar medium plates. Make 3 plates for each dilution. Place the plates in a constant temperature incubator at 37℃ for 24h, and count the number of colonies on each plate.

[0041] Calculation of antibacterial rate: According to the formula

[0042] Where A is the average colony count after culture of the control sample, and B is the average colony count after culture of the sample; Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Antibacterial rate (%) 98.5 82.5 87.5 90 91.5 Air permeability test: Cut the fabric into circular specimens with a diameter of 80mm. Prepare 3 specimens per group. Turn on the air permeability tester and preheat for 30 minutes. Calibrate according to the instrument manual to ensure that the test pressure difference is accurately 100Pa. Then place the specimen flat on the test head of the tester, ensuring that the specimen and the test head are well sealed. Start the tester and begin measuring the air flow through the fabric within 1 minute. Test each specimen 3 times and take the average value:

[0043] Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Air permeability (mm / s) 300 165 235 245 210 Breaking strength: In accordance with GB / T3923.1-2013, cut the fabric into specimens with warp and weft dimensions of 200 mm × 50 mm. Prepare five specimens in each warp and weft direction. Turn on the electronic universal material testing machine, set the tensile speed to 100 mm / min, and the initial fixture spacing to 100 mm. Clamp the specimen in the fixture of the testing machine, ensuring that the specimen is flat and clamped in the fixture. Start the testing machine and conduct the tensile test until the specimen breaks.

[0044] The breaking strength test results are as follows: Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Warp breaking strength 300-330N 250-280N 260-290N 270-300N 260-290N Weft breaking strength 280-300N 230-260N 240-270N 250-280N 240-270N Abrasion resistance: Cut the fabric into circular specimens with a diameter of 140 mm, preparing three specimens per group. Also prepare standard abrasives. Turn on a Martindale abrasion tester, set the friction count to 5000 times, and the loading pressure to 9 kPa. Secure the specimens to the friction head of the tester, placing them in contact with the standard abrasives. Start the tester and conduct the friction test. After the friction is complete, remove the specimens and observe the wear on the fabric surface, such as for damage or fuzzing.

[0045] The wear resistance test results are as follows: Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Slightly fuzzy, no obvious damage Obvious fuzzing, rough surface Some fluff, slight damage The hair is obvious and there is a little damage The pilling is serious and there is some damage It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. An antibacterial and breathable cotton yarn textile fabric for maternal and infant use, characterized by: The invention comprises an inner braided layer, a middle braided layer and an outer braided layer. The inner braided layer uses 80S fine cotton yarn and combed cotton that have been treated with enzymes and coated with microcapsules, and is tightly woven using double-layer plain weave and mesh jacquard, with a weaving density of 120 yarns per square centimeter. The middle braided layer uses 40S cotton yarn and is woven using a loose honeycomb structure, with a weaving density of 60 yarns per square centimeter. The outer braided layer uses 50S cotton yarn and is woven using a twill weave, with a weaving density of 90 yarns per square centimeter. The cotton yarn is long-staple cotton from Xinjiang, and the fiber length is 35 mm.

2. A method for preparing an antibacterial and breathable cotton yarn textile fabric for mothers and babies, which is used to prepare the antibacterial and breathable cotton yarn textile fabric for mothers and babies according to claim 1, characterized in that: The preparation method of cotton yarn textile fabric for maternal and infant use is as follows: S1. First, select Xinjiang long-staple cotton and perform preliminary cleaning to remove impurities and short fibers; S2, preparing antimicrobial agent microcapsules, and then uniformly dispersing the prepared antimicrobial agent microcapsules in an environmentally friendly solvent, using a padding process to attach the antimicrobial agent microcapsules to cotton yarn, and then drying at low temperature; S3, immersing the dried cotton yarn in a silver ion solution, and achieving silver ion loading by controlling the solution concentration, immersion time and temperature; S4, then the cotton yarn loaded with silver ions is placed in the prepared enzyme solution with a bath ratio of 1:20, and treated at a temperature of 50°C for 90 minutes. During the treatment process, it is continuously stirred. After the treatment is completed, the cotton yarn is rinsed with clean water to remove residual enzyme solution and impurities; S5. Using a computer knitting machine, knit the inner layer, middle layer, and outer layer fabrics according to the designed knitting density and needle method to obtain an inner knitted layer, a middle knitted layer, and an outer knitted layer; S6, compounding the woven three-layer fabric together through solvent-free lamination technology; S7. Wash the composite fabric to remove residual chemicals and soften it; S8. Finally, the softened fabric is shaped.

3. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 2, characterized in that: In S1, also included: S1-1, opening and cleaning the long-staple cotton raw materials, removing impurities and cotton seeds in the cotton by a cotton cleaning machine, and forming the cotton into loose cotton rolls; S1-2, combing the cleaned cotton lap further to comb the fibers into single fibers, remove short fibers and fine impurities, and forming slivers using a carding machine; S1-3. Select multiple cotton slivers and combine them together, and then perform drafting and twisting operations on the cotton slivers to make 40S, 50S and 80S cotton yarns respectively.

4. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 2, characterized in that: In S2, the preparation method of antimicrobial agent microcapsules is as follows: S2-1. Gelatin and gum arabic were prepared into aqueous solutions with mass fractions of 2% and 3%, respectively. The solutions were stirred at 50°C, mixed in a ratio of 1:1, and the pH value was adjusted to 4.5 to form a composite colloidal solution. Tea tree essential oil and thyme essential oil were then mixed in a ratio of 1:1, Tween-80 was added, and the mixed essential oil was slowly dripped into the composite colloidal solution at a stirring speed of 1300 r / min to form a stable O / W emulsion. S2-2. The emulsion was then cooled to 15°C, and a 10% by mass sodium sulfate solution was slowly added. The stirring was continued for 60 minutes, and then a glutaraldehyde solution was added for solidification treatment. The solidification time was 2 hours. Finally, the emulsion was filtered and washed to obtain pure antibacterial agent microcapsules.

5. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 2, characterized in that: In S3, the dried cotton yarn is placed in a silver nitrate solution with a concentration of 0.1 g / L, immersed at 45° C. for 50 minutes, and then washed with water to remove unadsorbed silver ions.

6. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 2, characterized in that: In S4, the enzyme solution is prepared as follows: Select neutral protease and dissolve it in a buffer solution with a pH value of 7 at a concentration of 2g / L. Add appropriate amounts of penetrant and softener and stir thoroughly.

7. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 6, characterized in that: The buffer solution is a phosphate buffer solution, the penetrant is JFC penetrant, and the softener is an ester-based quaternary ammonium salt softener.

8. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 2, characterized in that: In S5, the weaving method is as follows: S5-1. Inner layer knitting: 80S fine cotton yarn and combed cotton are installed on the creel of the computer knitting machine. According to the stitch requirements of double-layer plain weave and mesh jacquard, the computer knitting machine program is set to start knitting the inner knitting layer. During the knitting process, the knitting density is monitored in real time to ensure that the requirement of 120 yarns per square centimeter is met. S5-2, Middle Layer Knitting: Replace the yarn and install 40S cotton yarn on the creel. Select a loose honeycomb structure. Reset the knitting program of the computer knitting machine and start knitting the middle layer. Also monitor the knitting density in real time to ensure that 60 yarns per square centimeter are achieved. S5-3, outer layer knitting: replace the yarn again, install 50S cotton yarn, set the computer knitting machine program according to the twill stitch requirements, knit the outer knitting layer, and monitor the knitting density to reach 90 yarns per square centimeter.

9. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 2, characterized in that: In S7, it also includes: S7-1. Wash the composite fabric in clean water to remove surface impurities and residual chemicals. The washing temperature is 50°C and the washing time is 30 minutes. S7-2. Soak the washed fabric in a solution containing softener for 15 minutes. The softener concentration is 3g / L. After soaking, dehydrate and dry.

10. The method for preparing an antibacterial and breathable cotton yarn textile fabric for maternal and infant use according to claim 2, characterized in that: In S8, the softened fabric is subjected to setting treatment using a heat setting device, with the temperature set to 160° C. and the time being 5 minutes.