Functional polyester-covered cotton fabric, preparation method and application thereof

Abstract

The present invention discloses a functional polyester-cotton fabric, its preparation method, and application, belonging to the field of textile technology. The preparation method comprises the following steps: S1, treating a polyester-cotton fabric substrate with a cooling finishing agent; S2, mixing nano-zinc oxide and a dispersant and ultrasonically treating them to obtain a nano-zinc oxide dispersion; S3, mixing the nano-zinc oxide dispersion with a thickener, and applying the mixture to the first surface of the fabric substrate treated in step S1; S4, mixing the mixture obtained in step S3 with a fluorine-free waterproofing agent, and applying the mixture to the first surface of the fabric substrate treated in step S3. The functional polyester-cotton fabric produced by the preparation method of the present invention simultaneously exhibits UV protection, unidirectional moisture conduction, and a cooling effect.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a functional polyester-covered cotton fabric and a preparation method and application thereof. Background Art

[0002] As living standards improve, the demand for functional textiles continues to grow. Research and development of textiles with multifunctional finishes has become a benchmark for the textile industry. Polyester-cotton fabric, a fabric interwoven with polyester and cotton fibers, combines the advantages of both fibers, offering wear resistance, washability, and wrinkle resistance. However, traditional polyester-cotton fabrics offer limited outdoor performance, including limited UV protection and significantly lower moisture absorption than cotton fabrics. They also lack cooling or cooling properties, failing to alleviate the discomfort associated with high temperatures.

[0003] However, research on fabrics with UV-resistant properties primarily focuses on the incorporation of UV absorbers and the utilization of nanotechnology, such as improving fabrics' UV resistance. Several UV absorbers offer excellent UV resistance, such as benzophenone derivatives and benzotriazole derivatives. However, the use of UV absorbers may compromise the comfort of fabrics. Nanotechnology, particularly nano-zinc oxide finishing, offers new avenues for the development of UV-resistant fabrics. When applied to natural fibers such as cotton, linen, and silk, the UV-resistant effects of nano-zinc oxide have been extensively studied and recognized. However, research on the functional finishing of nano-zinc oxide is relatively limited compared to polyester (PET) and polyamide fibers (such as nylon). This is due to differences in chemical structure and physical properties between synthetic and natural fibers. Existing one-way moisture-wicking products typically achieve this by adding moisture-wicking agents, as well as water-repellents or waxes, to the fabric. These water-repellents contain fluorine compounds, which are environmentally unfriendly and lose their effectiveness after repeated washing. There are two main methods for producing cooling functional fabrics: weaving with cooling functional fibers and applying a cooling finishing process. Cooling functional fibers are often produced by physically or chemically modifying chemical fibers, but their breathability and perspiration-wicking properties are limited, resulting in a strong feeling of stuffiness when worn in high humidity conditions. The effectiveness of cooling finishing agents also diminishes with repeated washing.

[0004] Therefore, it is necessary to provide a method for preparing a functional polyester-covered cotton fabric that simultaneously meets the requirements of moisture conduction, cooling and UV protection to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a method for preparing a functional polyester-covered cotton fabric. The resulting functional polyester-covered cotton fabric has good UV resistance, enhanced unidirectional moisture conduction properties, and a cooling effect.

[0006] The present invention also provides the functional polyester-covered cotton fabric.

[0007] The present invention also provides application of the functional polyester-covered cotton fabric.

[0008] The first aspect of the present invention provides a method for preparing the above-mentioned nano yarn unidirectional moisture-conducting fabric, the preparation method comprising the following steps:

[0009] The preparation method comprises the following steps:

[0010] S1, treating a polyester-covered cotton fabric substrate in a cool finishing agent;

[0011] S2, mixing the nano zinc oxide and the dispersant and performing ultrasonic treatment to obtain a nano zinc oxide dispersion;

[0012] S3, mixing the nano zinc oxide dispersion and a thickener, and applying the mixture on the first surface of the fabric substrate treated in step S1;

[0013] S4. Mix the mixed solution prepared in step S3 with a fluorine-free waterproofing agent, and apply the mixture to the first surface of the fabric substrate treated in step S3.

[0014] The preparation method according to the first aspect of the present invention has at least the following beneficial effects:

[0015] The present invention adopts coating technology to synergistically finish a nano zinc solution dispersion and a fluorine-free waterproofing agent on the surface of a fabric, giving a hydrophobic structure to one side of the fabric and improving the difference in hydrophilic wetting structure between the inside and outside of the fabric; coating a nano zinc oxide dispersion on the other side to give the fabric anti-ultraviolet performance; and achieving a cooling effect on the fabric by an immersion method; at the same time, a UV protection layer and a unidirectional moisture-conducting layer are formed by synergistic use of the nano zinc solution dispersion, the fluorine-free waterproofing agent and a thickener on the surface of the fabric, thereby improving the overall performance and stability of the coating and overcoming the problem that the function of the cooling finishing agent weakens with increasing washing times.

[0016] According to some embodiments of the present invention, in step S1, the weight of the fabric substrate is 180 to 220 g / m 2 The warp density is 280-320 strands / 10cm, and the weft density is 240-280 strands / 10cm.

[0017] Preferably, in step S1, the weight of the fabric substrate is 200 g / m 2The warp density is 300 strands / 10cm and the weft density is 260 strands / 10cm.

[0018] According to some embodiments of the present invention, in step S1, the cool finishing agent is COOL-MAX contact cool finishing agent.

[0019] According to some embodiments of the present invention, in step S1, the concentration of the cooling finishing agent is 5 to 11 wt%.

[0020] Preferably, in step S1, the concentration of the cool finishing agent is 7-9 wt%.

[0021] According to some embodiments of the present invention, in step S1, the soaking time is 20 to 35 minutes.

[0022] According to some embodiments of the present invention, in step S1, the soaking temperature is 50-80°C.

[0023] According to some embodiments of the present invention, in step S2, the dispersant is sodium polynaphthalenesulfonate (NNO).

[0024] According to some embodiments of the present invention, in step S2, the concentration of the dispersant is 0.6-1.0 g / L.

[0025] According to some embodiments of the present invention, in step S2, the mass ratio of the nano zinc oxide to the dispersant is 1:0.4-0.7.

[0026] According to some embodiments of the present invention, in step S2, the ultrasonic treatment time is 5 to 15 minutes.

[0027] According to some embodiments of the present invention, in step S2, the frequency of the ultrasonic treatment is 10 to 30 KHZ.

[0028] Preferably, in step S2, the frequency of the ultrasonic treatment is 20 KHZ.

[0029] According to some embodiments of the present invention, in step S2, the power of the ultrasonic treatment is 400-600W.

[0030] Preferably, in step S2, the power of the ultrasonic treatment is 500W.

[0031] According to some embodiments of the present invention, in step S3, the thickener is PTF.

[0032] According to some embodiments of the present invention, in step S3, the concentration of the thickener is 2-4 wt%.

[0033] Preferably, in step S3, the concentration of the thickener is 3 wt %.

[0034] According to some embodiments of the present invention, in step S3, the mass ratio of the nano zinc oxide dispersion to the thickener is 23-27:2.

[0035] Preferably, in step S3, the mass ratio of the nano zinc oxide dispersion to the thickener is 25:2.

[0036] According to some embodiments of the present invention, in step S3, the coating has a thickness of 450 to 550 μm.

[0037] According to some embodiments of the present invention, in step S4, the fluorine-free waterproofing agent is PSY CONC.

[0038] According to some embodiments of the present invention, in step S4, the concentration of the fluorine-free waterproofing agent is 13-17 wt %.

[0039] Preferably, in step S4, the concentration of the fluorine-free waterproofing agent is 15 wt %.

[0040] According to some embodiments of the present invention, in step S4, the mass ratio of the mixed liquid to the fluorine-free waterproofing agent is 23-27:2.

[0041] Preferably, in step S4, the mass ratio of the mixed liquid to the fluorine-free waterproofing agent is 25:2.

[0042] A second aspect of the present invention provides a functional polyester-covered cotton fabric, comprising:

[0043] fabric substrate;

[0044] a cooling layer impregnated on the fabric substrate;

[0045] a UV protection layer coated on one side of the first surface of the fabric substrate;

[0046] A unidirectional moisture conducting layer is coated on the second surface of the fabric substrate.

[0047] The third aspect of the present invention provides the use of the functional polyester-covered cotton fabric in the preparation of textile products.

[0048] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0050] Figure 1This is a diagram of the preparation process of the functional polyester-covered cotton fabric in Example 1 of the present invention;

[0051] Figure 2 This is a graph showing the effects of different concentrations of dispersants on the nano zinc oxide dispersion in Test Example 1 of the present invention;

[0052] Figure 3 This is a graph showing the effect of different ultrasonic times on the nano zinc oxide dispersion in Test Example 1 of the present invention;

[0053] Figure 4 This is a graph showing the effect of different concentrations of fluorine-free water repellent on the contact angle of fabric in Test Example 2 of the present invention;

[0054] Figure 5 This is a graph showing the effect of different concentrations of fluorine-free waterproofing agents on the moisture absorption properties of fabrics in Test Example 2 of the present invention;

[0055] Figure 6 This is a graph showing the effect of the number of times the unidirectional moisture conducting layer is applied on the contact angle of the fabric in Test Example 3 of the present invention;

[0056] Figure 7 This is a graph showing the effect of the number of times a unidirectional moisture-conducting layer is applied on the moisture absorption performance of the fabric in Test Example 3 of the present invention;

[0057] Figure 8 This is a graph showing the effect of the number of times the UV protection layer is applied on the UV protection performance in Test Example 4 of the present invention;

[0058] Figure 9 This is a graph showing the effect of the cool feeling finishing agent on the cool feeling coefficient in Test Example 5 of the present invention;

[0059] Figure 10 This is a graph showing the effect of immersion temperature on the cooling coefficient in Test Example 5 of the present invention;

[0060] Figure 11 3 is a graph showing the effect of immersion time on the cooling coefficient in Test Example 5 of the present invention. DETAILED DESCRIPTION

[0061] The following will clearly and completely describe the concept and technical effects of the present invention in conjunction with the embodiments to fully understand the purpose, features and effects of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0062] In the description of the present invention, if there is a description of first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0063] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein are understood to include any and all subranges subsumed therein.

[0064] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of the present invention.

[0065] Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0066] Reagents and instruments used in the examples of the present invention:

[0067] Nano ZnO: Shanghai Mecoxlin Biochemical Technology Co., Ltd.;

[0068] Anhydrous sodium carbonate: Guangzhou brand chemical reagent;

[0069] Dispersant NNO: Shanghai Mecoxlin Biochemical Technology Co., Ltd.;

[0070] Cool finishing agent COOL-MAX: Anbo Chemical Co., Ltd.

[0071] Thickener PTF: Foshan Chuanhua Fulian Fine Chemical Co., Ltd.

[0072] High-concentration fluorine-free waterproof PSY CONC: Shanghai Fuke New Materials Co., Ltd.

[0073] Electric constant temperature blast drying oven: DHG-9070A, Shanghai Jinghong Experimental Equipment Co., Ltd.

[0074] Fabric UV resistance tester: NF2021, Ningbo Textile Instrument Factory;

[0075] Homogenizer: IKA T25, IKA, Germany;

[0076] Electronic balance: NBL254, Adam Equipment (Wuhan) Co., Ltd.

[0077] Contact angle measuring instrument: DSA25E, Kuss, Germany;

[0078] Nanoparticle size and zeta potential instrument: Y571B, Malvern Instruments Ltd.;

[0079] Textile contact coolness coefficient tester: NF3031, Ningbo Textile Instrument Factory;

[0080] Example 1

[0081] This embodiment 1 provides a method for preparing a functional polyester-covered cotton fabric, comprising the following steps:

[0082] 1) Weigh 15 mL of COOL-MAX and pour it into 85 mL of distilled water. Soak a polyester-covered cotton fabric substrate in the COOL-MAX solution in a 60°C water bath for 30 minutes. Dry it in an oven at 80°C for 20 minutes, then remove the fabric and let it stand at room temperature for 1 hour.

[0083] 2) 1.5 g of nano-ZnO and 0.08 g of NNO were added to a beaker, followed by 100 mL of purified water. The mixture was ultrasonically dispersed for 10 min at a power of 500 W and a frequency of 20 kHz. The mixture was then stirred for 10 min using a homogenizer to obtain a nano-ZnO dispersion.

[0084] 3) The nano ZnO dispersion and the thickener PTF with a concentration of 3 wt % were mixed in a mass ratio of 25:2, and mixed under an electric stirrer to obtain an anti-ultraviolet finishing liquid. The anti-ultraviolet finishing liquid was coated on one side of the polyester-covered cotton fabric three times using a coating roller. Each coating was dried in an oven at 80° C. for 20 minutes, and then the coating was continued. The thickness of the first coating was 500±50 μm.

[0085] 4) The nano ZnO dispersion and 3 wt% thickener PTF mixture prepared in step 3) were mixed with 15 wt% fluorine-free waterproofing agent PSY CONC at a mass ratio of 25:2 under an electric stirrer to obtain a unilateral moisture-conducting finishing solution. The unilateral surface of the polyester-covered cotton fabric was coated three times using a coating roller. Each coating was dried in an oven at 80° C. for 10 minutes, and then the coating was continued. The thickness of the additional coating was 500±50 μm, thereby obtaining a polyester-covered cotton fabric having UV resistance, unilateral moisture-conducting properties, and a cool feel. The process flow chart is shown in FIG. Figure 1 shown.

[0086] Test Example 1

[0087] The particle size was measured using a nanometer particle size analyzer and zeta potential analyzer.

[0088] Nano-zinc oxide dispersions prepared with dispersant NNO concentrations of 0, 0.2, 0.4, 0.6, 0.8, 1.0, and 1.2 g / L were tested. When the dispersant concentration is too low, the dispersant molecules are insufficient to completely cover the surface of the Nano-ZnO (nano-zinc oxide) particles, resulting in stronger inter-particle interactions and increased aggregation into larger particles. As the NNO concentration increases, the surfactant molecules gradually adsorb onto the particle surfaces, reducing the inter-particle attraction and, consequently, decreasing the average particle size and PDI. When the dispersant concentration is too high, the excess dispersant molecules may increase the bond resistance between the particles, which in turn increases the mutual repulsion between the particles, causing the particles to reaggregate, thereby increasing the average particle size and PDI. The bond repulsion between the dispersant and the Nano-ZnO particles affects the dispersion effect. Excessively strong or weak interactions between the dispersant and the particles can result in poor dispersion, increasing the average particle size and PDI. Therefore, when the dispersant concentration is within a limited range, the dispersant molecules form a uniform and stable dispersion layer on the surface of the Nano-Zno particles, and the interaction force between the particles is minimized, so the average particle size and PDI reach the minimum value. The results are as follows Figure 2 shown.

[0089] Nano zinc oxide dispersions prepared with ultrasonic times of 0, 5, 10, 15, 20, and 25 minutes were used for testing. Ultrasonic waves generate high-frequency vibrations and cavitation effects in the liquid, which can destroy the agglomeration structure between particles and make the nano ZnO particles more evenly dispersed in the solvent. The nanoparticles gradually break as the ultrasonic dispersion time increases, so the average values ​​of the particle size and PDI are gradually decreasing. When the dispersion time reaches 10 minutes, it is observed that the average particle size and PDI values ​​reach the minimum value, which may be because the energy input of ultrasonic dispersion and the agglomeration force between particles have reached a state of equilibrium. At this time, the energy of ultrasonic dispersion is sufficient to break the agglomeration between particles, but will not excessively destroy the stability of the particles, so the dispersion effect is the best. When the ultrasonic dispersion time is too long, the average particle size and PDI begin to increase. This may be because the surface of the particles is damaged due to ultrasonic dispersion for too long, or the stability between particles is destroyed, resulting in re-agglomeration. In addition, long-term ultrasonic dispersion may also cause the temperature of the solvent to rise, affecting the dispersion effect. The results are shown in Figure 2. Figure 3 shown.

[0090] Test Example 2

[0091] The contact angle test is in accordance with the national standard GB / T 30693-2014.

[0092] Functional polyester-covered cotton fabrics prepared with fluorine-free waterproofing agent concentrations of 0%, 5%, 10%, 15%, 20%, and 25% were tested. When the concentration of fluorine-free waterproofing agent was 15%, the growth rate of the coating surface contact angle slowed down, and the moisture absorption time stabilized in the 40s range. At this time, the waterproofing agent factor adsorbed the fabric fiber structure to the maximum value, and the unidirectional moisture conduction effect reached the best. Figure 5 shown.

[0093] When the concentration of fluorine-free waterproofing agent is too high, the contact angle of the coating surface is stable, but the hydrophobic angle of the hydrophilic surface also tends to increase slowly. This is because the fluorine-free waterproofing agent can not only form a waterproof layer on the surface of the fabric, but also penetrate to the back of the fabric, resulting in a hydrophobic effect on both sides. However, this double-sided hydrophobic effect will affect the unidirectional moisture conduction of the fabric, that is, the direction of water transfer on the fabric is subject to certain restrictions, resulting in Figure 4 shown.

[0094] The influence of coating times on the unidirectional moisture-conducting layer: As the coating times increase, the contact angle of the hydrophobic layer increases, while the contact angle of the hydrophilic layer changes within a stable range. When the coating times reach 3 times, the contact angle of the hydrophobic layer increases slowly, but the contact angle of the hydrophilic layer continues to increase, and the moisture absorption and transmission time increases. The optimal coating times are 3 times.

[0095] When the number of coatings is less than 3 times, as the coating thickness increases, the thicker coating can form a smoother and more continuous surface, thereby providing better hydrophobic properties. Water droplets are more likely to form spheres on the surface and have a larger contact angle, and the contact angle of the hydrophilic layer is also increasing; when the number of coatings is greater than 3 layers, because the coating liquid is not dry enough, only one side is coated during the coating process, but there is still a phenomenon that the solution penetrates through the fabric to the other side, causing the water contact angle of the hydrophilic layer to increase and the moisture absorption time to be prolonged. Therefore, for the one-way moisture conduction effect, the high-concentration fluorine-free waterproof PSY CONC coating number is 3 layers, and the results are as follows Figure 6 and Figure 7 shown.

[0096] Test Example 4

[0097] The test of fabric anti-ultraviolet performance is in accordance with GB / T 18830-2009.

[0098] As the number of coatings increases, the UPF value increases, while the UVA transmittance decreases. When the number of coatings reaches 3, the UVA value reaches the standard value of 5%. As the number of coatings increases, the UPF and UVA transmittance values ​​tend to stabilize. When the number of coatings is less than 3, the average percentage of UVA gradually decreases as the number of coatings increases, while the UPF value increases. This is because the valence band electrons of Nano-ZnO absorb ultraviolet light and undergo transitions, thereby shielding from ultraviolet radiation.

[0099] When the number of coatings is 3, the UPF value has reached 192.4, far exceeding the national standard GB / T18830 requirement of UPF greater than 50. At the same time, the UVA transmittance is 4.92%, less than the standard value of 5%, which also meets the national standard for anti-ultraviolet standards. Continuing to increase the number of coatings, the protective effect of the fabric tends to be stable. Therefore, choosing three layers of coating is the best choice. It can achieve excellent anti-ultraviolet effect, meet the requirements of national standards, and ensure the functionality of the fabric, taking into account its practicality and comfort. Figure 8 shown.

[0100] Test Example 5

[0101] The contact cooling coefficient test is in accordance with GB / T 35263-2017.

[0102] Concentration of cooling finishing agent: The cooling coefficient of polyester cover cotton will increase significantly with the increase of cooling finishing agent concentration. When the cooling finishing agent concentration reaches 9%, the cooling coefficient reaches its maximum value. As the concentration continues to increase, the cooling coefficient gradually tends to a balanced state. When the cooling finishing agent concentration increases from 5% to 9%, the attachment and distribution of finishing agent molecules on the fabric gradually increase, which significantly improves the cooling performance of the fabric. This is because the cooling factor can be fixed to the inside of the fabric to form a more uniform and dense coating, thereby increasing the cooling coefficient of the fabric. When the finishing agent concentration exceeds 9%, the increasing trend of the fabric cooling coefficient begins to become less obvious. This may be because the finishing agent molecules on the surface and inside of the fabric are close to saturation and can no longer accommodate more finishing agent molecules. At this point, even if the finishing agent concentration continues to increase, it will not have a significant effect on the cooling performance of the fabric. Therefore, the optimal finishing agent concentration is 9%, and the results are as follows. Figure 9 shown.

[0103] Impregnation temperature: As the impregnation temperature increases, the coolness coefficient of the polyester cover cotton will increase significantly. When the finishing temperature reaches 60°C, the coolness coefficient reaches its maximum value. When the finishing temperature continues to increase, the coolness coefficient gradually decreases. When the finishing temperature is less than 60°C, the coolness coefficient continues to increase with the increase in temperature. This may be because the reaction and adsorption process of the cool finishing agent on the fabric is more active at high temperatures, allowing the effective ingredients to be more fully combined with the fabric fibers. When the finishing temperature is greater than 60°C, excessively high processing temperature may cause the mint essential oil component in the finishing agent to decompose or volatilize, and the water temperature may overheat and damage the fibers, thereby affecting the cooling effect. When the temperature is 60°C, the coolness coefficient reaches its maximum value. At this time, the coolness factor of the finishing agent fully reacts and adsorbs with the fabric without causing the decomposition or volatilization of the components. The results are as follows. Figure 10 shown.

[0104] Impregnation time: As the impregnation time increases, the coolness coefficient of the polyester cover cotton will gradually increase. When the impregnation time reaches 30 minutes, the coolness coefficient reaches its maximum value. As the impregnation time continues to increase, the coolness coefficient gradually stabilizes. When the impregnation time is less than 30 minutes, the finishing agent molecules have enough time to penetrate into the interior of the fabric, fully contact and react with the fibers, thereby forming a more uniform and stable coating. This causes the coolness coefficient of the fabric to gradually increase because more cool factors are fixed to the fabric, increasing its surface energy and coolness performance. When the impregnation time exceeds 30 minutes, the increasing trend of the fabric coolness coefficient will tend to be flat. This is because the finishing agent molecules have fully penetrated into the fabric at this time and have reached a saturated state with the fibers. Continuing to extend the impregnation time will not significantly increase the amount of finishing agent molecules attached to the fabric, so the coolness coefficient of the fabric tends to stabilize or slightly decrease, as shown in the results. Figure 11 shown.

[0105] In summary, the functional polyester-covered cotton fabric prepared by the preparation method of the present invention has a hydrophobic layer contact angle of 149.3° and a hydrophilic layer contact angle of 81.3°. After being immersed in a 9% cooling finishing agent in a 60°C aqueous solution for 30 minutes, its cooling performance is improved from the original cooling coefficient of 0.064 to 0.219, and it has cooling performance. Compared with the untreated cotton fabric, the UPF of the polyester-covered cotton fabric is increased from 7.32 to 192.41, and the UVA transmittance is reduced from 22.24% to 4.93%, so that the polyester-covered cotton fabric has excellent moisture conduction and cool and quick-drying properties.

[0106] While the embodiments of the present invention have been described in detail above, the present invention is not limited to the embodiments described above. Various modifications may be made within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof may be combined with one another unless there is a conflict.

Claims

1. A method for preparing a functional polyester-covered cotton fabric, characterized in that: The preparation method comprises the following steps: S1, soaking the polyester-covered cotton fabric substrate in a cool finishing agent; S2, mixing the nano zinc oxide and the dispersant and performing ultrasonic treatment to obtain a nano zinc oxide dispersion; S3, mixing the nano zinc oxide dispersion and a thickener, and applying the mixture on the first surface of the fabric substrate treated in step S1; S4, the mixed solution obtained in step S3 is mixed with the fluorine-free waterproofing agent and applied to the other surface of the fabric substrate treated in step S3; in step S1, the cool finishing agent is COOL-MAX contact cool finishing agent; in step S1, the concentration of the cool finishing agent is 5~11wt%; the soaking time is 20~35min; in step S1, the soaking temperature is 50~80℃; in step S2, the dispersant is sodium polynaphthalenesulfonate; the concentration of the dispersant is 0.6~1.0g / L; in step S2, the mass ratio of the nano zinc oxide and the dispersant is 1:0.4~0.7; in step S2, the dispersant is sodium polynaphthalenesulfonate; the concentration of the dispersant is 0.6~1.0g / L; in step S2, the mass ratio of the nano zinc oxide and the dispersant is 1:0.4~0.7; in step S2, the The ultrasonic treatment time is 5 to 15 minutes; in step S2, the frequency of the ultrasonic treatment is 10 to 30 kHz; the power of the ultrasonic treatment is 400 to 600 W; in step S3, the thickener is PTF; in step S3, the concentration of the thickener is 2 to 4 wt%; in step S3, the mass ratio of the nano zinc oxide dispersion to the thickener is 23 to 27:2; in step S3, the coating thickness is 450 to 550 μm; the number of coatings in step S3 is 1 to 3 times; in step S4, the fluorine-free waterproofing agent is PSYCONC; in step S4, the concentration of the fluorine-free waterproofing agent is 13 to 17 wt%; in step S4, the mass ratio of the mixed solution to the fluorine-free waterproofing agent is 23 to 27:2; the coating thickness is 450 to 550 μm; in step S4, the number of coatings is 1 to 3 times.

2. The preparation method according to claim 1, wherein in step S1, the weight of the fabric substrate is 180-220 g / m 2 The warp density is 280~320 strands / 10cm, and the weft density is 240~280 strands / 10cm.

3. A functional polyester-covered cotton fabric, characterized in that: Prepared by the preparation method according to any one of claims 1 to 2, the functional polyester-covered cotton fabric comprises: fabric substrate; a cooling layer impregnated on the fabric substrate; a UV protection layer coated on one side of the first surface of the fabric substrate; A unidirectional moisture conducting layer is coated on the second surface of the fabric substrate.

4. Use of a functional polyester-covered cotton fabric prepared by the preparation method according to any one of claims 1 to 2 in the preparation of textile products.

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