Breathable cool fabric and preparation method thereof

Abstract

The present invention discloses a breathable and cooling fabric and a preparation method thereof, belonging to the field of textile technology. The preparation method comprises the following steps: blending mint fiber, bamboo fiber, and cotton fiber to obtain yarn; weaving the yarn to obtain a composite fabric; and sequentially pre-sizing, scouring, and dyeing the composite fabric, wherein the finishing liquid for the dyeing and finishing is a nano-ZnO dispersion. The fabric is blended with mint fiber, bamboo fiber, and cotton fiber, which have a cooling function. The thermal conductivity of nano-ZnO is utilized to quickly conduct heat away during wear. The generated heat is discharged with the flow of air due to the breathability imparted by the bamboo fiber and cotton fiber, forming a flowing system, rather than a simple finishing agent absorbing heat upon contact to produce a cooling sensation. The fabric also has other properties such as UV resistance, and has a good hand feel and excellent wearing comfort.

Description

Technical Field

[0001] The present invention relates to the field of textile technology, in particular to a breathable and cool fabric and a preparation method thereof. Background Art

[0002] Cooling textiles have good thermal conductivity and moisture absorption and perspiration wicking capabilities, which can help regulate the microclimate on the human skin surface. Summer clothing made of cooling fabrics can lower the wearer's body surface temperature, indirectly reducing the frequency of air conditioning use, thereby achieving the goal of energy conservation and emission reduction. In hot weather or when the human body is exercising, the skin tends to secrete a lot of sweat. However, the cooling fabrics currently on the market are dominated by various cooling chemical fibers such as polyester, nylon and polyethylene. During the preparation process, the cooling fibers are designed with special-shaped cross-sections or incorporate nano-scale masterbatches of minerals with good thermal conductivity, such as mica particles. However, these fabrics have disadvantages such as poor moisture absorption and perspiration wicking and uncomfortable touch when worn for a long time. It is difficult to strike a balance between thermal and tactile comfort. Therefore, the development of cooling and breathable fabrics is particularly important.

[0003] The ability of simple nanomaterials to act on fabrics is limited, and there are requirements for the fabric's organizational structure. Fibers with large gaps in the structure can enter more finishing agents, while those with small gaps in the internal structure of the fiber structure can only enter a small amount of finishing agents. Chinese invention patent application CN 109778529 A discloses a method for preparing a one-way moisture-conducting pure cotton fabric based on nano zinc oxide. Cotton fabric is used as a substrate, a hydrophobic finishing agent is printed on one side of the cotton fabric in a printing manner, and nano ZnO is applied to the cotton fabric by padding before finishing. A functional cotton fabric with moisture absorption, quick drying, and good cooling properties is prepared to meet the thermal and wet comfort problems of clothing in hot summer and during strenuous exercise, giving the skin a dry and comfortable feeling, while also giving the wearer a certain cool feeling. However, the cool feeling is achieved only by padding nano zinc oxide. Nano zinc oxide can improve the thermal conductivity of the fabric, but its cool feeling is poor in durability and washability.

[0004] Chinese invention patent application CN 115366495 A discloses a cool fabric, weaving method, and application thereof. The inner layer of fabric is made of cool fibers, antibacterial fibers, quick-drying fibers, polylactic acid fibers, and nylon fibers, and the outer layer of fabric is made of cool fibers, quick-drying fibers, polylactic acid fibers, and temperature-regulating fibers. A multi-layer structure is used to protect the inner layer of fabric. The cool fabric, weaving method, and application thereof utilize air plasma etching on the inner layer of fabric that is close to the skin, followed by a cool finishing process using xylitol and menthol as the cool finishing agents. Xylitol and menthol have poor water washability and are not very durable, resulting in insufficient coolness after multiple washes. The inner layer of fabric that is close to the skin and the outer layer of fabric are quilted and sewn together to form a single, integrated fabric. The finishing process also utilizes a crosslinking agent and a penetrant, which reduces the fabric's air permeability and affects color fastness to a certain extent. The crosslinking agent also affects the fabric's feel. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a breathable cool fabric which has a long-lasting cool feeling, is washable and has excellent tactile comfort performance.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] The preparation method of the breathable cool fabric comprises the following steps:

[0008] S1, blending mint fiber, bamboo fiber and cotton fiber to obtain yarn;

[0009] S2, weaving the yarn to obtain a composite fabric;

[0010] S3. Presetting, scouring, bleaching and dyeing the composite fabric in sequence, wherein the dyeing and finishing liquid is a nano ZnO dispersion.

[0011] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0012] The breathable and cool fabric is obtained by the above preparation method.

[0013] The beneficial effects of the present invention are: mint fiber with a cooling function is blended with bamboo fiber and cotton fiber, and the thermal conductivity of nano zinc oxide is utilized to discharge the heat generated by the human body into the external environment. The higher the thermal conductivity of the fabric, the better its heat dissipation performance, and the heat can be quickly conducted away during wearing. The generated heat is discharged with the flow of air due to the breathability given by the bamboo fiber and the cotton fiber, forming a flowing system, rather than a simple finishing agent absorbing heat and producing a cooling feeling at the moment of contact. At the same time, the fabric also has other properties such as ultraviolet resistance, and has a good hand feel and excellent wearing comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a result diagram of test example 1 of the present invention. DETAILED DESCRIPTION

[0015] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0016] Please refer to Figure 1 The preparation method of the breathable cool fabric comprises the following steps:

[0017] S1, blending mint fiber, bamboo fiber and cotton fiber to obtain yarn;

[0018] S2, weaving the yarn to obtain a composite fabric;

[0019] S3. Presetting, scouring, bleaching and dyeing the composite fabric in sequence, wherein the dyeing and finishing liquid is a nano ZnO dispersion.

[0020] The breathable and cool fabric is obtained by the above preparation method.

[0021] As can be seen from the above description, the beneficial effects of the present invention are: mint fiber with a cooling function is blended with bamboo fiber and cotton fiber to produce a fabric. Mint fiber is a regenerated cellulose fiber with good moisture absorption and air permeability. The fabric feels fresh when worn and can absorb and discharge sweat produced by the human body. While possessing excellent antibacterial properties, it can also provide good wearing performance. Bamboo fiber has characteristics such as good air permeability, moisture absorption, strong wear resistance and good dyeability, and also has antibacterial, antibacterial, deodorizing and UV-resistant functions. Nano ZnO dispersion has excellent UV resistance and thermal conductivity, which can improve the thermal conductivity of the fabric, thereby discharging the heat generated by the human body into the external environment. The higher the thermal conductivity of the fabric, the better its heat dissipation. Therefore, the fabric after being arranged with the nano ZnO dispersion has improved thermal conductivity, and can quickly conduct heat away during wearing, thereby improving the cooling sensation and making it more comfortable to wear. Nano ZnO is arranged in the composite fabric prepared from mint fiber / bamboo fiber / cotton fiber, so that the cooling sensation of the composite fabric is enhanced, and other properties such as UV resistance can also be provided.

[0022] Furthermore, before step S1, step S0 is also included, preparing mint fiber, which specifically includes the following steps: crushing natural mint extract, adding soft water, and stirring evenly to obtain mint slurry, adding the mint slurry to viscose spinning solution, and using the viscose spinning solution as a matrix to obtain mint fiber by wet spinning.

[0023] Furthermore, the viscose spinning solution enters the coagulation bath through the spinneret and is mixed with the coagulation bath.

[0024] Furthermore, the mass ratio of the peppermint extract to the soft water is 1:4.

[0025] As can be seen from the above description, the main components of natural mint extract are xylitol and menthone. The mint extract is mixed with soft water at a certain mass ratio to fully disperse the mint extract in the water, resulting in a mint slurry that facilitates spinning. When the mint extract content is below this range, the slurry is too dilute, while when the mint extract content is above this range, the mint slurry is too thick, both of which are not conducive to spinning. The simultaneous use of viscose spinning solution and mint slurry for spinning is due to the excellent wearability of viscose fiber, such as its moisture absorption and breathability, making the resulting composite fabric more breathable.

[0026] Furthermore, in step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 4:4:6 to 2:2:2.

[0027] Furthermore, in step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 3:3:4.

[0028] From the above description, it can be seen that by limiting the mass ratio of mint fiber, bamboo fiber and cotton fiber, the cooling and breathable function of the prepared fabric is optimized. If the ratio of mint fiber and bamboo fiber is too large, the cost will increase while affecting the feel of the fabric. Increasing the proportion of cotton fiber will lead to a decrease in the cooling function.

[0029] Furthermore, in step S1, the blending includes the following steps performed in sequence: opening and cleaning the mint fiber, bamboo fiber and cotton fiber, carding, first and second bends, roving and spun yarn to obtain yarn.

[0030] From the above description, it can be seen that by blending, the cost of fabrics can be reduced while making the fabric styles more diverse.

[0031] Furthermore, in step S2, the weaving adopts loop weaving and floating line weaving.

[0032] From the above description, it can be seen that by combining the two weaving methods, the prepared hybrid fabric has multiple breathable holes. Combined with the moisture absorption properties of bamboo fiber and cotton fiber, sweat can be discharged faster, thereby achieving a cool feeling, improving practicality and wearing comfort.

[0033] Furthermore, in step S3, the predetermined forming temperature is 150-160°C.

[0034] From the above description, it can be seen that by limiting the predetermined temperature range, the dimensional stability of the fabric is improved. When the temperature exceeds this range, the elasticity of the fabric is easily lost. When the temperature is lower than this range, the desired effect cannot be achieved.

[0035] Furthermore, in step S3, the dyeing and finishing is a one-bath dyeing and finishing process using a two-dip and two-pad process.

[0036] Furthermore, a two-dip two-pad process is used, specifically: the fabric is first dipped and then padded, the first dipping time is 5 minutes, and the second dipping time is 3 minutes.

[0037] From the above description, it can be seen that the two-dip and two-roll process is used to prepare the nano-ZnO dispersion on the fabric. The nano-ZnO dispersion is a multifunctional new inorganic material. It is a white hexagonal crystal or spherical particle with excellent UV resistance and thermal conductivity. It can be added to the fabric to improve the thermal conductivity of the fabric. The higher the thermal conductivity of the fabric, the better the heat dissipation. Adding nano-ZnO can make the fabric conduct heat faster during wearing, thereby improving the coolness and making it more comfortable to wear.

[0038] Furthermore, the nano ZnO dispersion includes a dispersant and a coupling agent, and the dispersant and the coupling agent are ultrasonically dispersed to prepare the nano ZnO dispersion.

[0039] Furthermore, the nano ZnO dispersion includes a peregal O dispersant and a chelated phosphate titanium coupling agent.

[0040] Furthermore, the nano ZnO dispersion includes 1% of peregal O dispersant and 0.5% of chelated phosphate titanium coupling agent.

[0041] As can be seen from the above description, the nano-ZnO dispersion contains a dispersant called Peregal O. Peregal O is a nonionic surfactant with a high number of hydrophilic groups (polyoxyethylene) in its molecular chain, which increases the steric hindrance between the nano-ZnO particles. When the hydrophilic groups are adsorbed on the surface of the nano-ZnO, they can reduce the aggregation of the nano-ZnO particles and lower the surface tension of the nano-ZnO particles, thereby reducing the aggregation of the nano-ZnO particles and making them more effective on fabrics. Chelated phosphate titanium coupling agent TC-311 is a water-soluble titanate coupling agent that can enhance the bonding between the nano-ZnO particles and the fabric and also chemically crosslink with the fabric, thereby improving the durability of the nano-ZnO finished fabric.

[0042] Furthermore, between steps S1 and S2, there is also included step S1.1, etching the yarn obtained in S1 using a normal pressure low temperature plasma generator, and then immersing the yarn in a microcapsule suspension.

[0043] From the above description, it can be seen that low-temperature plasma treatment of yarn surface can cause a variety of physical and chemical changes in the yarn, such as etching, forming a dense cross-linking layer, and introducing polar groups, so that the material's viscosity, hydrophilicity, biocompatibility, dyeability and electrical properties are improved; low-temperature plasma treatment can effectively treat fibers or fabrics without changing the internal composition of the fibers; atmospheric pressure low-temperature plasma technology has many advantages such as uniform energy distribution, little damage to the treated samples, a wide range of treatment objects, no need for additional vacuum equipment, and no influence from the modified space, thereby improving the safety of operation; and plasma treatment only has an etching effect on the surface of the fiber, and causes little damage to the inside of the fiber. It has the advantages of easy operation, fast processing speed, good treatment effect, little environmental pollution, energy saving, etc., which is in line with the development concept of green environmental protection.

[0044] Furthermore, the microcapsule suspension is prepared from xylitol hydrogel microcapsules.

[0045] From the above description, it can be seen that xylitol can absorb water to produce an endothermic reaction. Applying the microcapsule suspension to the fabric can make the skin feel cool. The endothermic reaction of xylitol is used to prepare it into hydrogel microcapsules, which are then prepared into a microcapsule suspension and applied to the fabric, thereby improving the cool feeling of the composite fabric. The fabric is then etched using plasma technology to produce pits on the fabric surface and increase the stickiness of the fabric, thereby increasing the adsorption amount of microcapsules and nano-zinc oxide on the fabric, so that the cool feeling can be maintained for a longer time.

[0046] Furthermore, the preparation method of the xylitol hydrogel microcapsules includes the following steps: using anhydrous dichloromethane as a solvent and triethylamine as an acidifying agent, reacting acryloyl chloride and xylitol at room temperature for 4 hours, then adding water and an initiator to carry out vinyl polymerization, passing nitrogen, then adding 0.5% gelatin and 0.5% gum arabic to react for 2 hours, and finally spray drying to obtain xylitol hydrogel microcapsules.

[0047] As can be seen from the above description, xylitol is a sugar alcohol that, when dissolved in water, produces an endothermic reaction that lowers the temperature. When fabric contains xylitol, it absorbs perspiration from the body, producing an endothermic reaction that creates a cooling sensation on the skin and lowers the skin's surface temperature. Combining microcapsule production processes with hydrogel production creates microcapsules with hydrogel properties. Because hydrogels are water-absorbent, they can absorb perspiration, further promoting a cooling sensation.

[0048] Please refer to Figure 1 , embodiment 1 of the present invention is:

[0049] The preparation method of the breathable cool fabric comprises the following steps:

[0050] S0. Preparing mint fiber, comprising the following steps: crushing a natural mint extract, adding soft water, wherein the mass ratio of the mint extract to water is 1:4, and stirring uniformly to obtain a mint slurry; adding the mint slurry to a viscose spinning solution; using the viscose spinning solution as a matrix; passing the viscose spinning solution through a spinneret into a coagulation bath; mixing with the coagulation bath; and processing the mint fiber by a wet spinning method. The viscose spinning solution comprises 8.6% methyl cellulose and 10% NH4Cl; the coagulation bath comprises 110 g / L H2SO4, 11.5 g / L ZnSO4, and 320 g / L Na2SO4; the spinning speed is 30 m / min; and the total draft is 120%.

[0051] S1. Blending mint fiber, bamboo fiber, and cotton fiber in a mass ratio of 3:3:4 using a spinning machine using a spindle spinning process, specifically, opening and cleaning the mint fiber, bamboo fiber, and cotton fiber, carding, first and second bends, roving, and spun yarn to obtain yarn;

[0052] S1.1. The yarn obtained in S1 is etched using a normal pressure low temperature plasma generator, and then the yarn is immersed in a microcapsule suspension.

[0053] S2, weaving the yarn by loop weaving and float weaving to obtain a composite fabric;

[0054] S3, pre-setting the composite fabric at a temperature of 150°C for 30 seconds;

[0055] S3.1. Scour and bleach the composite fabric after pre-setting: When scouring, add 2% soda ash, 1% scouring penetrant FK-ST12E2, 1% anti-wrinkle agent, and 0.5% chelating dispersant FK-422A at a solution temperature of 50°C, raise the temperature to 70°C, add 27.5% of 6mL / L H2O2, continue to raise the temperature to 95°C for 40 minutes, and finally cool to 50°C and wash with water. The bath ratio is 1:10.

[0056] S3.2. Perform one-bath dyeing and finishing using a two-dip, two-pad process. The immersion liquid is 10 g / L, the color is direct gray D, the color is 1 g / L soda ash, 2 g / L wetting agent Tween-80, 2 g / L leveling agent Peregal O, and 12 g / L finishing liquid. The finishing liquid is a nano-ZnO dispersion comprising 0.1% Peregal O dispersant and 0.5% chelated phosphate titanium coupling agent. The nano-ZnO dispersion is prepared by ultrasonically dispersing 0.1% Peregal O dispersant and 0.5% chelated phosphate titanium coupling agent. The bath ratio is 1:10, the immersion time is 10 minutes, the padding rate is 85%, the pre-drying temperature is 80°C for 3 minutes, and the baking temperature is 150°C for 130 seconds.

[0057] Please refer to Figure 1 , the second embodiment of the present invention is:

[0058] The only difference between Example 2 and Example 1 is that in step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 4:4:2.

[0059] Please refer to Figure 1 , the third embodiment of the present invention is:

[0060] The only difference between Example 2 and Example 1 is that in step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 35:35:30.

[0061] Please refer to Figure 1 , the fourth embodiment of the present invention is:

[0062] The only difference between Example 2 and Example 1 is that in step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 25:25:50.

[0063] Please refer to Figure 1 , the fifth embodiment of the present invention is:

[0064] The only difference between Example 2 and Example 1 is that in step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 20:20:60.

[0065] Comparative Example 1 of the present invention is:

[0066] The only difference between Comparative Example 1 and Example 1 is that in step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 4:4:7.

[0067] Comparative Example 2 of the present invention is:

[0068] The only difference between Comparative Example 2 and Example 1 is that commercially available pure cotton fabric is used instead of the fabric obtained by blending mint fiber, bamboo fiber and cotton fiber in Example 1.

[0069] Comparative Example 3 of the present invention is:

[0070] The only difference between Comparative Example 3 and Example 1 is that no nano-ZnO dispersion is added in step S3.2.

[0071] Comparative Example 4 of the present invention is:

[0072] The only difference between Comparative Example 4 and Example 1 is that Step S1.1 and Step S3.1 are different, as follows:

[0073] The preparation method of the breathable cool fabric comprises the following steps:

[0074] S0. Preparing mint fiber comprises the following steps: crushing a natural mint extract, adding soft water, wherein the mass ratio of the mint extract to water is 1:4, and stirring uniformly to obtain a mint slurry; adding the mint slurry to a viscose spinning solution; using the viscose spinning solution as a matrix; passing the viscose spinning solution into a coagulation bath through a spinneret; mixing with the coagulation bath; and processing the mint fiber by a wet spinning method. The viscose spinning solution comprises 8.6% methyl cellulose and 10% NH4Cl; the coagulation bath comprises 110 g / L H2SO4, 11.5 g / L ZnSO4, and 320 g / L Na2SO4; the spinning speed is 30 m / min; and the total draft is 120%.

[0075] S1. Blending mint fiber, bamboo fiber, and cotton fiber in a mass ratio of 3:3:4 using a spindle spinning process on a spinning machine, specifically, sequentially opening and cleaning, carding, first and second bends, roving, and spun yarn on the mint fiber, bamboo fiber, and cotton fiber to obtain yarn;

[0076] S1.1. Etch the yarn obtained in S1 using a normal pressure low temperature plasma generator.

[0077] S2, weaving the yarn by loop weaving and float weaving to obtain a composite fabric;

[0078] S3, pre-setting the composite fabric at a temperature of 150°C for 30 seconds;

[0079] S3.1. Scouring and bleaching the composite fabric after pre-setting: When scouring and bleaching, add 2% soda ash, 1% scouring penetrant (the model of the scouring penetrant is FK-ST12E2), 1% anti-wrinkle agent, and 0.5% chelating dispersant FK-422A at a solution temperature of 50°C, raise the temperature to 70°C, add 27.5% of 6mL / L H2O2, continue to raise the temperature to 95°C and treat for 40 minutes, finally cool to 50°C and wash with water, with a bath ratio of 1:10.

[0080] S3.2. Perform one-bath dyeing and finishing using a two-dip, two-pad process. The dipping solution is 10 g / L direct ash D, 1 g / L soda ash, 2 g / L wetting agent Tween-80, 2 g / L leveling agent Peregal O, 12 g / L finishing solution, and 10 g / L microcapsule suspension. The finishing solution is a nano-ZnO dispersion comprising 0.1% Peregal O dispersant and 0.5% chelated phosphate titanium coupling agent. The nano-ZnO dispersion is prepared by ultrasonically dispersing the 0.1% Peregal O dispersant and 0.5% chelated phosphate titanium coupling agent. The bath ratio is 1:10, the dipping time is 10 minutes, the padding rate is 85%, the pre-drying temperature is 80°C for 3 minutes, and the baking temperature is 150°C for 130 seconds.

[0081] Comparative Example 5 of the present invention is:

[0082] The only difference between Comparative Example 5 and Example 1 is that Step S1.1 and Step S3.1 are different, as follows:

[0083] The preparation method of the breathable cool fabric comprises the following steps:

[0084] S0. Preparing mint fiber comprises the following steps: crushing a natural mint extract, adding soft water, wherein the mass ratio of the mint extract to water is 1:4, and stirring uniformly to obtain a mint slurry; adding the mint slurry to a viscose spinning solution; using the viscose spinning solution as a matrix; passing the viscose spinning solution into a coagulation bath through a spinneret; mixing with the coagulation bath; and processing the mint fiber by a wet spinning method. The viscose spinning solution comprises 8.6% methyl cellulose and 10% NH4Cl; the coagulation bath comprises 110 g / L H2SO4, 11.5 g / L ZnSO4, and 320 g / L Na2SO4; the spinning speed is 30 m / min; and the total draft is 120%.

[0085] S1. Blending mint fiber, bamboo fiber, and cotton fiber in a mass ratio of 3:3:4 using a spinning machine using a spindle spinning process, specifically, opening and cleaning the mint fiber, bamboo fiber, and cotton fiber, carding, first and second bends, roving, and spun yarn to obtain yarn;

[0086] S2, weaving the yarn by loop weaving and float weaving to obtain a composite fabric;

[0087] S3, pre-setting the composite fabric at a temperature of 150°C for 30 seconds;

[0088] S3.1. Scour and bleach the composite fabric after pre-setting: When scouring, add 2% soda ash, 1% scouring penetrant FK-ST12E2, 1% anti-wrinkle agent, and 0.5% chelating dispersant FK-422A at a solution temperature of 50°C, raise the temperature to 70°C, add 27.5% of 6mL / L H2O2, continue to raise the temperature to 95°C for 40 minutes, and finally cool to 50°C and wash with water. The bath ratio is 1:10.

[0089] S3.11. Etch the fabric obtained in S3.1 using a normal pressure low temperature plasma generator.

[0090] S3.2. Perform one-bath dyeing and finishing using a two-dip, two-pad process. The dipping solution is 10 g / L direct ash D, 1 g / L soda ash, 2 g / L wetting agent Tween-80, 2 g / L leveling agent Peregal O, 12 g / L finishing solution, and 10 g / L microcapsule suspension. The finishing solution is a nano-ZnO dispersion comprising 0.1% Peregal O dispersant and 0.5% chelated phosphate titanium coupling agent. The nano-ZnO dispersion is prepared by ultrasonically dispersing 0.1% Peregal O dispersant and 0.5% chelated phosphate titanium coupling agent. The bath ratio is 1:10, the dipping time is 10 minutes, the padding rate is 85%, the pre-drying temperature is 80°C for 3 minutes, and the baking temperature is 150°C for 130 seconds.

[0091] Comparative Example 6 of the present invention is:

[0092] The only difference between Comparative Example 6 and Example 1 is that step S1.1 is not performed.

[0093] Test Example 1

[0094] The air permeability and coolness coefficient of Examples 1 to 5 and Comparative Examples 1 to 2 were tested using an FFZ413 textile instant coolness tester and a YG461E-2 air permeability tester. The results are as follows: Figure 1 shown.

[0095] Test Example 2

[0096] The air permeability and coolness coefficient of Example 1 and Comparative Example 3 were tested using an FFZ413 textile instant coolness tester and a YG461E-2 air permeability tester, and the results are shown in Table 1.

[0097] Table 1

[0098] Example 1 Comparative Example 3 <![CDATA[Cooling coefficient (W*cm -3 )]]> 0.23 0.21 <![CDATA[Average air permeability (mm*s -2 )]]> 4871 4908

[0099] Test Example 3

[0100] The air permeability and coolness coefficient of Example 1 and Comparative Examples 4 to 6 were tested using an FFZ413 textile instant coolness tester and a YG461E-2 air permeability tester. The results are shown in Table 2.

[0101] Table 2

[0102]

[0103] Depend on Figure 1 The results show that blending mint fiber, bamboo fiber, and cotton fiber in different proportions yields better air permeability and cooling properties than pure cotton fabrics. This suggests that the composite finished fabric is effective, functional, and practical. Furthermore, a mint fiber, bamboo fiber, and cotton fiber ratio of 20:20:60 yields the lowest cooling coefficient but the best air permeability. A mint fiber, bamboo fiber, and cotton fiber ratio of 40:20:20 yields the highest cooling coefficient but the worst air permeability. A blend of 30:30:40 exhibits the best air permeability and cooling properties.

[0104] As shown in Table 1, the fabric treated without adding nano zinc oxide dispersion during padding also has a good cool feeling, which shows that mint fiber can give the fabric a cool feeling, and the addition of nano zinc oxide can further improve the cool feeling, thereby further improving the practicality.

[0105] As shown in Table 2, the cooling sensation of the composite fabric treated with etching and microcapsule suspension was significantly better than that of the untreated composite fabric. Furthermore, the cooling sensation of the fabric treated with microcapsule suspension directly after yarn blending was higher than that of the fabric treated with microcapsule suspension after etching and scouring. It was also higher than that of the fabric treated with microcapsule suspension after scouring and etching. Furthermore, the fabric treated with xylitol hydrogel microcapsule suspension after etching and microcapsule treatment maintained a good cooling sensation after 30 washes, demonstrating that the etching microcapsule treatment of the present invention can effectively improve the durability and washability of the cooling sensation of the composite finished fabric.

[0106] In summary, the breathable cool fabric and preparation method provided by the present invention are made by blending mint fiber with a cool feeling function with bamboo fiber and cotton fiber, and then treating the fabric with the thermal conductivity of nano zinc oxide and the heat absorption of xylitol hydrogel microcapsules. When the skin generates heat, the generated heat can be extracted by nano zinc oxide, and can also be absorbed by xylitol hydrogel microcapsules. The absorption and extraction can occur simultaneously, or it can be absorbed first and then extracted, or extracted first and then absorbed. The generated heat is discharged with the flow of air due to the breathability given by bamboo fiber and cotton fiber, forming a flowing system, rather than a simple finishing agent absorbing heat at the moment of contact to produce a cool feeling. At the same time, the etching effect of plasma technology is used to increase the adsorption amount of nano zinc oxide and xylitol hydrogel microcapsules on the fabric, thereby improving the durability and washability of the cool feeling, and will not affect the hand feel and wearing comfort.

[0107] Cooling fibers are used for spinning and weaving, and the heat absorption effect of xylitol hydrogel microcapsules and the etching effect of plasma technology on the yarn are utilized to increase the viscosity of the fabric and increase the pits on the fabric surface, thereby increasing the adsorption amount of nano-zinc oxide and xylitol hydrogel microcapsules, greatly improving the cooling feeling and enhancing its washability.

[0108] Nano-zinc oxide is applied to fabrics, leveraging its thermal conductivity to improve the fabric's thermal conductivity, allowing heat generated by the human body to be dissipated more quickly, creating a cooling sensation. Xylitol absorbs heat and then conducts it away through the nano-zinc oxide. Alternatively, nano-zinc oxide can directly conduct heat away, or xylitol can directly absorb it. These two processes can work simultaneously. Combined with the breathability of bamboo and cotton fibers, the heat absorbed by xylitol and the heat conducted away by the nano-zinc oxide are dissipated, enhancing the cooling sensation.

[0109] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for preparing a breathable cool fabric, characterized in that: The following steps are involved: S1, blending mint fiber, bamboo fiber and cotton fiber to obtain yarn; S1.

1. Etching the yarn using a low-temperature plasma generator at atmospheric pressure, and then immersing the yarn in a microcapsule suspension prepared from xylitol hydrogel microcapsules; The preparation method of the xylitol hydrogel microcapsules comprises the following steps: using anhydrous dichloromethane as a solvent and triethylamine as an acidifying agent, reacting acryloyl chloride and xylitol at room temperature for 4 hours, then adding water and an initiator to carry out vinyl polymerization, introducing nitrogen, then adding 0.5% gelatin and 0.5% gum arabic to react for 2 hours, and finally spray drying to obtain xylitol hydrogel microcapsules; S2, weaving the yarn to obtain a composite fabric; S3. Presetting, scouring, bleaching and dyeing the composite fabric in sequence, wherein the dyeing and finishing liquid is a nano ZnO dispersion.

2. The method for preparing the breathable cool fabric according to claim 1, wherein: Before step S1, the step S0 of preparing mint fiber is further included, which specifically includes the following steps: crushing the natural mint extract, adding soft water, and stirring evenly to obtain a mint slurry; The mint slurry is added into the viscose spinning solution, and the viscose spinning solution is used as a matrix and processed by a wet spinning method to obtain the mint fiber.

3. The method for preparing the breathable cool fabric according to claim 1, wherein: In step S1, the mass ratio of the mint fiber, bamboo fiber and cotton fiber is 4:4:6 to 2:2:

2.

4. The method for preparing the breathable cool fabric according to claim 1, wherein: In step S1, the blending includes the following steps performed in sequence: opening and cleaning the mint fiber, bamboo fiber and cotton fiber, carding, first and second bends, roving and spun yarn to obtain yarn.

5. The method for preparing the breathable cool fabric according to claim 1, wherein: In step S2, the weaving adopts loop weaving and float weaving.

6. The method for preparing the breathable cool fabric according to claim 1, wherein: In step S3, the predetermined setting temperature is 150-160°C.

7. The method for preparing a breathable cool fabric according to claim 1, wherein: In step S3, the dyeing and finishing is a one-bath dyeing and finishing process using a two-dip and two-pad process.

8. The method for preparing the breathable cool fabric according to claim 1, wherein: The nano ZnO dispersion comprises a dispersant and a coupling agent, and the dispersant and the coupling agent are dispersed by ultrasonication to prepare the nano ZnO dispersion.

9. A breathable cool fabric prepared by the method for preparing a breathable cool fabric according to any one of claims 1 to 8.

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