One-way moisture-wicking and thermal insulation fabric and its preparation method

Abstract

This invention discloses a one-way moisture-wicking and thermal fabric and its preparation method. The preparation method includes fabric preparation, finishing, dyeing, opening, adding auxiliaries, napping, combing, shearing, and finishing. Compared with existing technologies, this invention uses polyester and spandex woven with a weft-knitted, cotton-wool structure, resulting in a fabric with a tight structure, excellent elasticity, good hand feel, and excellent moisture-wicking, perspiration-wicking, and warmth-retaining properties. The fabric keeps the skin dry at all times, effectively reducing the risk of colds, protecting babies, and pioneering a new technology for moisture-wicking clothing, especially suitable for autumn and winter wear.

Description

Technical Field

[0001] This invention relates to the field of textile industry technology, and in particular to a unidirectional moisture-wicking and heat-insulating fabric and its preparation method. Background Technology

[0002] With the rapid development of economic life, people have increasingly higher demands for health, comfort, and fashion, which in turn places higher demands on textile products. Clothing tends to cling to the skin when wet, and the fabric lacks breathability and elasticity, failing to truly meet people's needs for clothing to quickly absorb moisture, wick away sweat, breathe, deodorize, and increase comfort.

[0003] One-way moisture-wicking fabrics can conduct sweat unidirectionally from the inner layer of the fabric that comes into contact with the skin to the outer layer of the fabric, where it evaporates quickly. The sweat on the outer layer will not seep back into the inner layer of the fabric, thus keeping the skin dry and maintaining the moisture and heat balance of the microenvironment between the fabric and the human skin.

[0004] CN105544079A discloses a single-layer moisture-wicking fabric and its preparation method, consisting of an inner layer and an outer layer. The inner layer is a water-repellent layer, and the outer layer is a hydrophilic layer. This invention selects appropriate hydrophilic finishing agents, surfactants, complexing agents, and crosslinking agents for compounding, and screens out the hydrophilic treatment agent with the best moisture-wicking effect; furthermore, polypropylene is treated with a waterproofing agent. This invention possesses excellent moisture-wicking, quick-drying, and breathable functions. However, this application requires the addition of chemical moisture-wicking and quick-drying additives to achieve the moisture-wicking and warmth-retaining functions, and further improvements are needed. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides a method for preparing a unidirectional moisture-wicking and thermal fabric, characterized by comprising: preparing greige fabric, setting the greige fabric, dyeing, opening the width, adding auxiliaries to set the greige fabric, napping, combing, shearing, and shaping.

[0006] Fabrics made of polyester and spandex not only have a delicate texture, soft touch, lasting elasticity, and good drape, but also provide comfortable clothing with excellent breathability, moisture permeability, wrinkle resistance, and wrinkle-free properties.

[0007] The preparation method of unidirectional moisture-wicking and thermal insulation fabric includes the following steps:

[0008] Step 1, Greige Fabric: Using a double-sided circular knitting machine, polyester and spandex are knitted into greige fabric with a specific weave structure;

[0009] Step 2, Blank setting: Arrange the blank obtained in step S1 in the shaping machine for blank setting;

[0010] Step 3, dyeing: Add the above-mentioned greige fabric to the dye bath and heat it to 50-60℃ for 5-10 minutes. Then, carry out the dyeing process. Finally, take out the greige fabric, wash it with water, and dry it.

[0011] Step 4, Opening the width: Perform opening and water-pressing treatment on the above fabric at a speed of 10 yards;

[0012] Step 5, Adding additives and setting the blank: The above-mentioned blank fabric is sent into the setting machine for setting to obtain the set blank fabric;

[0013] Step 6, napping: Use a napping machine to nap the reverse side of the above-mentioned fabric.

[0014] Step 7, Combing: Use a combing machine to comb the side that has been brushed.

[0015] Step 8, Shearing: Use a shearing machine to shear the hair on the side that has been combed above;

[0016] Step 9, Shaping: The above-mentioned fabric is shaped using a shaping machine. After passing inspection, a one-way moisture-wicking and warm fabric is obtained.

[0017] Preferably, in step 1, the polyester is 50D / 96F polyester; the spandex is 40D spandex; wherein the polyester accounts for 75-80% of the weight of the fabric, with the remainder being spandex; the 50D / 96F polyester has an irregular cross-section with longitudinal grooves to increase the surface area. The wicking structure of the grooves quickly absorbs moisture and sweat from the skin's surface and instantly expels it. The fibers on the fabric then diffuse and rapidly evaporate the sweat, thus achieving the purpose of moisture absorption and perspiration wicking, regulating body temperature, and keeping the skin dry and cool. Spandex is short for polyurethane fiber, an elastic fiber with good resistance to acids and alkalis, sweat, seawater, dry cleaning, and abrasion.

[0018] Preferably, the specific structure described in step 1 is a weft-knitted fabric with added yarn, or a cotton-wool structure; the yarn is configured as a two-way loop, with each loop connected to polyester and spandex added.

[0019] Preferably, in step 2, when the fabric is fixed by the shaping machine, the dry setting is carried out at 170-195℃; when the fabric is dried, the machine speed of the shaping machine is 25-30m / min, the frame is 180-192cm, the upper / lower overfeed is 38-42% / 0-2%, and the pressure is 1.2-1.4Mpa;

[0020] Preferably, in step 3, the bath ratio of the greige fabric to the dye liquor is 1g:(10-30)mL; the dye liquor (based on 1L, with water as the solvent) consists of 5-10g / L dye, 0.1-0.5g / L leveling agent TF-213, 1-3g / L penetrant, and 0.5-2g / L cocamidopropyl betaine;

[0021] Preferably, the dyeing process in step 3 involves maintaining the temperature at 45-55℃ for 5-10 minutes, then increasing the temperature at a rate of 1-2℃ / min to 70-90℃ for 30-50 minutes, increasing the temperature at a rate of 1-2℃ / min to 100-110℃ for 10-30 minutes, increasing the temperature at a rate of 1-2℃ / min to 110-120℃ for 15-25 minutes, increasing the temperature at a rate of 1-3℃ / min to 120-135℃ for 5-15 minutes, and finally decreasing the temperature at a rate of 0.5-1℃ / min to 95-105℃, and then increasing the temperature at a rate of 1-2℃ / min. The temperature is lowered to 60-80℃ at a rate of 1-2℃ / min, and then to 40-45℃. The fabric woven from polyester and spandex has strong elasticity and extensibility, good skin-friendliness, and one-way moisture-wicking function, keeping the skin dry after sweating. It also has good warmth retention and is comfortable to wear, especially suitable for spring and autumn. In the dyeing machine, the airflow generated by the high temperature and the friction between the fabric and the machine can easily cause the fabric to stretch, wrinkle, elastic fatigue, and damage. Therefore, it is necessary to control the rate of heating and cooling during the fabric dyeing process, and rapid heating and cooling should be avoided.

[0022] Preferably, in step 5, when the fabric is set by the setting machine, wet setting is first performed at 170-180℃, and dry setting is performed at 175-185℃. During wet setting, the additives include penetrant and water; wherein the concentration of penetrant is 0.3-0.8g / L. During the wet setting of the fabric, the setting machine speed is 25-30m / min, the frame is 175-180cm, the upper / lower overfeed is 35-38% / 2-5%, and the pressure is 1-1.3Mpa. During the dry setting of the fabric, the setting machine speed is 25-30m / min, the frame is 170-175cm, the upper / lower overfeed is 38-40% / 0-2%, and the pressure is 1-1.3Mpa.

[0023] Preferably, the parameters for the napping process in step 6 are: straight needle speed 140-145 rpm, curved needle speed 130-135 rpm, and pre-tension 8-10 μpm.

[0024] Preferably, the combing process parameters in step 7 are: straight needle speed 60-65 rpm, curved needle speed 60-65 rpm, and pre-tension 10-15 ypm.

[0025] Preferably, the shearing process parameters in step 8 are: speed 15-20 rpm, blade speed 800-900 rpm, and brush speed 40-50 rpm.

[0026] Preferably, the setting process parameters of the setting machine in step 9 are: temperature 150-160℃, machine speed 15-20m / min, frame 170-175cm, air volume 90-95 (upper) / 85-90 (lower), and overfeed 8-10%. The setting temperature and speed are very important. If the temperature is too high and the speed is too slow, it will reduce the elasticity of the spandex and affect its strength. If the temperature is too low and the speed is too fast, it will be difficult to achieve the setting effect.

[0027] Preferably, the weight of the unidirectional moisture-wicking and thermal insulation fabric is 230 g / m². 2 -260g / m 2 .

[0028] This invention utilizes polyester and spandex in a weft-knit weave with a cotton-wool structure to create a fabric with a tight structure, excellent elasticity, good hand feel, and good moisture-wicking, perspiration-wicking, and warmth-retaining properties. However, fabrics woven from polyester and spandex suffer from problems such as poor color fastness, significant loss of elasticity, and creases.

[0029] A further preferred method for preparing a unidirectional moisture-wicking and thermally insulating fabric includes the following steps:

[0030] Step 1, Greige Fabric: Using a double-sided circular knitting machine, polyester and spandex are knitted with a specific weave structure to create greige fabric;

[0031] Step 2, Blank setting: Arrange the blank obtained in step S1 in the forming machine for blank setting;

[0032] Step 3, dyeing: Add the above-mentioned greige fabric to the dye bath and heat it to 50-60℃ for 5-10 minutes. Then, carry out the dyeing process. Finally, take out the greige fabric, wash it with water, and dry it.

[0033] Step 4: Post-treatment: The dyed fabric is post-treated to obtain post-treated fabric;

[0034] Step 5, Opening the width: Perform opening and water-pressing treatment on the above fabric at a speed of 10 yards;

[0035] Step 6, Adding additives and setting the blank: The above-mentioned blank fabric is sent into a setting machine for setting to obtain a set blank fabric;

[0036] Step 7, napping: Use a napping machine to nap the reverse side of the above-mentioned fabric.

[0037] Step 8, Combing: Use a combing machine to comb the side that has been brushed.

[0038] Step 9, Shearing: Use a shearing machine to shear the hair on the side that has been combed above;

[0039] Step 10, Shaping: The above-mentioned fabric is shaped using a shaping machine. After passing inspection, a one-way moisture-wicking and warm fabric is obtained.

[0040] Preferably, the method for post-treatment of the fabric in step 4 is as follows: (1) Add 1-2g fumaric acid, 1-2g glycidyl methacrylate, 4-8g acetonitrile, and 1-6g fatty alcohol polyoxyethylene ether to 50-100g water, mix evenly, and ultrasonically treat for 5-10 minutes to obtain a fumaric acid mixture.

[0041] (2) Add 3-6g of vinyl silicone oil and 1-4g of fatty alcohol polyoxyethylene ether to 20-50g of water and mix evenly to obtain a vinyl silicone oil mixture.

[0042] (3) Add the fabric to the mixture of fumaric acid and vinyl silicone oil at a bath ratio of 1g:(30-60)mL and soak for 30-50min. Then add 0.5-2g of crosslinking agent and 0.1-1g of initiator and sonicate for 5-10min. Heat to 70-80℃ and react for 1-3h. After the reaction is completed, take out the fabric and dry it to obtain the post-treated fabric.

[0043] The crosslinking agent is one or a mixture of ethylene glycol dimethacrylate, isoprene tetraacrylate, bisphenol A-dimethacrylate, neopentyl glycol diacrylate, and trimethylolpropane triacrylate.

[0044] The initiator is one or a mixture of azobisisobutyronitrile and azobisisoheptanenitrile.

[0045] In this application, the dyed fabric exhibits poor colorfastness and is prone to fading. Immersing the dyed fabric in a mixture of fumaric acid and vinyl silicone oil facilitates dye detachment from the fabric and dispersion within the mixture. Further addition of a crosslinking agent and initiator creates a dye molecular imprint, a three-dimensional network polymer. This imprint firmly binds the detached dye to the fabric, effectively resisting environmental changes and preventing washout and fading, thus providing a color-fixing effect. The post-treatment process incorporates numerous carboxyl and epoxy groups. These carboxyl groups react chemically and through hydrogen bonding with the hydroxyl and ester groups in the fabric. The addition of fatty alcohol polyoxyethylene ether effectively enhances the penetration of active groups, forming a crosslinked three-dimensional network structure within and on the surface of the fabric. This restricts the relative slippage between macromolecules, giving the fabric wrinkle resistance. The introduction of silicone oil further improves the fabric's softness.

[0046] The unsaturated base material used in the post-processing of this application readily reacts chemically with the active groups on the surface of the fabric, forming a mesh structure on and inside the fabric. This three-dimensional mesh structure prevents the fabric from wrinkling and deforming, and also has a color-fixing effect, preventing the fabric from fading or losing color, thereby ensuring that the fabric color remains unchanged.

[0047] The beneficial effects of this invention are:

[0048] 1. This invention uses polyester and spandex woven with a weft-knit fabric and a cotton-wool structure to create a fabric with a tight structure, excellent elasticity, good hand feel, and good moisture-wicking, perspiration-wicking, and warmth-retaining properties. The innovative yarn configuration, weaving process, and dyeing and finishing process of this invention produce knitted fabrics that are soft to the touch, highly elastic, and have a one-way moisture-wicking function, keeping the skin dry even after sweating. It also provides excellent warmth and comfortable wear, making it particularly suitable for spring and autumn wear.

[0049] 2. The moisture-wicking and quick-drying properties were evaluated using the dynamic moisture transfer method according to the national standard GB / T 21655.2-2019. Both the unidirectional moisture transfer index and the liquid water dynamic transfer comprehensive index, representing both the overall perspiration-wicking and quick-drying properties, met the national standard requirements before and after washing. The unidirectional moisture transfer index was level 5 before and after washing, meeting the national standard requirement of ≥3. The liquid water dynamic transfer comprehensive index was level 4 before and after washing, meeting the national standard requirement of ≥2. The unidirectional moisture-wicking and warm fabric prepared in this application does not require the addition of moisture-wicking and quick-drying additives; its excellent unidirectional moisture-wicking and warm fabric function is achieved solely through the fabric's structural design. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the weaving structure of the unidirectional moisture-wicking and heat-insulating fabric of the present invention. Detailed Implementation

[0051] Parameters for the specific chemical substances used in each embodiment, source:

[0052] The polyester used is 50D / 96F polyester;

[0053] The spandex used is 40D spandex;

[0054] MRZ penetrant, provided by Angco Chemical (Shanghai) Co., Ltd.

[0055] Vinyl silicone oil, model: DT-2000cs, purchased from Guangzhou Delta Organosilicon Technology Development Co., Ltd.

[0056] Example 1

[0057] The preparation method of unidirectional moisture-wicking and thermal insulation fabric includes the following steps:

[0058] Step 1, Greige Fabric: Polyester and spandex are knitted using a double-sided circular knitting machine to form greige fabric with a specific weave structure; wherein polyester accounts for 78% of the weight percentage of the greige fabric and spandex accounts for 22%; the specific weave structure is a plain weft knitting structure with added yarn and a cotton-wool structure; the yarn configuration is 2-way per cycle, with each way connected to polyester and spandex added at the same time;

[0059] Step 2, Blank setting: The blank obtained in step S1 is placed in the blank setting machine for blank setting. When setting the blank in the blank setting machine, dry setting is performed at 195℃. When the blank is laid out for dry setting, the machine speed is 30m / min, the frame is 180cm, the upper / lower overfeed is 40% / 0%, and the pressure is 1.3Mpa.

[0060] Step 3, Dyeing: Add the above-mentioned greige fabric to the dye bath and heat to 50℃ for 5 minutes. Then maintain the temperature at 50℃ for 8 minutes. Increase the temperature to 80℃ at a rate of 1℃ / min and react for 40 minutes. Increase the temperature to 105℃ at a rate of 1℃ / min and react for 20 minutes. Increase the temperature to 115℃ at a rate of 1℃ / min and react for 20 minutes. Increase the temperature to 130℃ at a rate of 2℃ / min and react for 10 minutes. Finally, decrease the temperature to 100℃ at a rate of 0.8℃ / min, decrease the temperature to 70℃ at a rate of 1℃ / min, and decrease the temperature to 45℃ at a rate of 2℃ / min. Finally, remove the greige fabric, wash it with water, and dry it. The bath ratio of greige fabric to dye bath is 1g:20mL. The dye bath (based on 1L, with water as the solvent) consists of 8g / L methylene blue, 0.3g / L leveling agent TF-213, 2g / L penetrant MRZ, and 1g / L cocamidopropyl betaine.

[0061] Step 4, Opening the width: Perform opening and water-pressing treatment on the above fabric at a speed of 10 yards;

[0062] Step 5, Adding additives and setting the fabric: The above-mentioned fabric is fed into a setting machine for setting. During setting, the setting machine first performs wet setting at 175℃ and then dry setting at 180℃. During wet setting, the additives include penetrant MRZ and water; the concentration of penetrant MRZ is 0.5g / L. During the wet setting of the fabric, the setting machine speed is 30m / min, the frame is 180cm, the upper / lower overfeed is 38% / 2%, and the pressure is 1.3MPa. During the dry setting of the fabric, the setting machine speed is 30m / min, the frame is 175cm, the upper / lower overfeed is 40% / 0%, and the pressure is 1.3MPa, to obtain the set fabric.

[0063] Step 6, napping: The reverse side of the above-mentioned fabric is napped using a napping machine. The napping parameters are: straight needle speed 145rpm, loop needle speed 135rpm, and pre-tension 10ypm.

[0064] Step 7, Combing: Use a combing machine to comb the side that has been brushed above. The combing process parameters are: straight needle speed 65 rpm, curved needle speed 65 rpm, and pre-tension 15 ypm.

[0065] Step 8, Shearing: Use a shearing machine to shear the hair on the side that has been combed above. The shearing process parameters are: speed 18 rpm, blade speed 900 rpm, brush speed 50 rpm.

[0066] Step 9, Shaping: The above-mentioned fabric is shaped using a shaping machine. The shaping process parameters of the shaping machine are: temperature 160℃, machine speed 20m / min, machine frame 175cm, air volume 95 (upper) / 90 (lower), overfeed 10%. After passing the inspection, a one-way moisture-wicking and thermal insulation fabric is obtained.

[0067] Example 2

[0068] The preparation method of unidirectional moisture-wicking and thermal insulation fabric includes the following steps:

[0069] Step 1, Greige Fabric: Polyester and spandex are knitted using a double-sided circular knitting machine to form greige fabric with a specific weave structure; wherein polyester accounts for 78% of the weight percentage of the greige fabric and spandex accounts for 22%; the specific weave structure is a plain weft knitting structure with added yarn and a cotton-wool structure; the yarn configuration is 2-way per cycle, with each way connected to polyester and spandex added at the same time;

[0070] Step 2, Blank setting: The blank obtained in step S1 is placed in the blank setting machine for blank setting. When setting the blank in the blank setting machine, dry setting is performed at 195℃. When the blank is laid out for dry setting, the machine speed is 30m / min, the frame is 180cm, the upper / lower overfeed is 40% / 0%, and the pressure is 1.3Mpa.

[0071] Step 3, Dyeing: Add the above-mentioned greige fabric to the dye bath and heat to 50℃ for 5 minutes. Then maintain the temperature at 50℃ for 8 minutes. Increase the temperature to 80℃ at a rate of 1℃ / min and react for 40 minutes. Increase the temperature to 105℃ at a rate of 1℃ / min and react for 20 minutes. Increase the temperature to 115℃ at a rate of 1℃ / min and react for 20 minutes. Increase the temperature to 130℃ at a rate of 2℃ / min and react for 10 minutes. Finally, decrease the temperature to 100℃ at a rate of 0.8℃ / min, decrease the temperature to 70℃ at a rate of 1℃ / min, and decrease the temperature to 45℃ at a rate of 2℃ / min. Finally, remove the greige fabric, wash it with water, and dry it. The bath ratio of greige fabric to dye bath is 1g:20mL. The dye bath (based on 1L, with water as the solvent) consists of 8g / L methylene blue, 0.3g / L leveling agent TF-213, 2g / L penetrant MRZ, and 1g / L cocamidopropyl betaine.

[0072] Step 4, Post-treatment: The dyed fabric is immersed in the mixing system at a bath ratio of 1g:30mL for 30 minutes. Then, 1g of crosslinking agent and 0.5g of azobisisobutyronitrile are added and ultrasonically treated for 5 minutes. The mixture is heated to 75℃ and reacted for 3 hours. After the reaction, the fabric is removed and dried to obtain the post-treated fabric. The mixing system consists of a fumaric acid mixture and a vinyl silicone oil mixture at a mass ratio of 1:1. The fumaric acid mixture is prepared by mixing 1g of fumaric acid, 1g of glycidyl methacrylate, 4g of acetonitrile, and 2g of fatty alcohol polyoxyethylene ether (AEO-4) in 50g of water, followed by ultrasonic treatment for 5 minutes. The vinyl silicone oil mixture is prepared by mixing 6g of vinyl silicone oil and 4g of fatty alcohol polyoxyethylene ether (AEO-4) in 50g of water. The crosslinking agent is prepared by mixing ethylene glycol dimethacrylate and isoprene tetraacrylate at a mass ratio of 1:2.

[0073] Step 5, Opening the width: Perform opening and water-pressing treatment on the above fabric at a speed of 10 yards;

[0074] Step 6, Adding Additives and Setting the Fabric: The above-mentioned fabric is fed into a setting machine for setting. During setting, the setting machine first performs wet setting at 175℃ and then dry setting at 180℃. During wet setting, the additives include penetrant MRZ and water; the concentration of penetrant MRZ is 0.5g / L. During the wet setting of the fabric, the setting machine speed is 30m / min, the frame is 180cm, the upper / lower overfeed is 38% / 2%, and the pressure is 1.3MPa. During the dry setting of the fabric, the setting machine speed is 30m / min, the frame is 175cm, the upper / lower overfeed is 40% / 0%, and the pressure is 1.3MPa, to obtain the set fabric.

[0075] Step 7, napping: The reverse side of the above-mentioned fabric is napped using a napping machine. The napping parameters are: straight needle speed 145rpm, loop needle speed 135rpm, and pre-tension 10ypm.

[0076] Step 8, Combing: Use a combing machine to comb the side that has been brushed above. The combing process parameters are: straight needle speed 65 rpm, curved needle speed 65 rpm, and pre-tension 15 ypm.

[0077] Step 9, Shearing: Use a shearing machine to shear the hair on the side that has been combed above. The shearing process parameters are: speed 18 rpm, blade speed 900 rpm, brush speed 50 rpm.

[0078] Step 10, Shaping: The above-mentioned fabric is shaped using a shaping machine. The shaping process parameters of the shaping machine are: temperature 160℃, machine speed 20m / min, machine frame 175cm, air volume 95 (upper) / 90 (lower), overfeed 10%. After passing the inspection, a one-way moisture-wicking and warm fabric is obtained.

[0079] Example 3

[0080] The process is basically the same as in Example 2, except that in step 4: the dyed fabric is added to the mixing system at a bath ratio of 1g:30mL and soaked for 30min, then 1g of crosslinking agent and 0.5g of azobisisobutyronitrile are added and ultrasonically treated for 5min, heated to 75℃ and reacted for 3h. After the reaction is completed, the fabric is taken out and dried to obtain the post-treated fabric. The mixing system is a fumaric acid mixture. The fumaric acid mixture is obtained by adding 1g of fumaric acid, 1g of glycidyl methacrylate, 4g of acetonitrile, and 2g of fatty alcohol polyoxyethylene ether (AEO-4) to 50g of water, mixing evenly, and ultrasonically treating for 5min. The crosslinking agent is a mixture of ethylene glycol dimethacrylate and isoprene tetraacrylate in a mass ratio of 1:2.

[0081] Example 4

[0082] The process is basically the same as in Example 2, except that in step 4: the dyed fabric is added to the mixing system at a bath ratio of 1g:30mL and soaked for 30min, then 1g of crosslinking agent and 0.5g of azobisisobutyronitrile are added and ultrasonically treated for 5min, heated to 75℃ and reacted for 3h. After the reaction is completed, the fabric is taken out and dried to obtain the post-treated fabric. The mixing system is a vinyl silicone oil mixture. The vinyl silicone oil mixture is obtained by adding 6g of vinyl silicone oil and 4g of fatty alcohol polyoxyethylene ether (AEO-4) to 50g of water and mixing them evenly. The crosslinking agent is a mixture of ethylene glycol dimethacrylate and isoprene tetraacrylate in a mass ratio of 1:2.

[0083] Example 5

[0084] It is basically the same as Example 2, except that the crosslinking agent is ethylene glycol dimethacrylate.

[0085] Example 6

[0086] It is basically the same as Example 2, except that the crosslinking agent is isoprene tetraacrylate.

[0087] Test Example 1

[0088] The color fastness to washing, color fastness to sunlight, and color fastness to rubbing of the unidirectional moisture-wicking thermal fabrics obtained in each example were tested in accordance with GB / T 3921-2008 "Textiles - Tests for color fastness to washing", GB / T 8427-2019 "Textiles - Tests for color fastness to artificial light: xenon arc lamp", and GB / T 3920-2008 "Textiles - Tests for color fastness to rubbing".

[0089] Color fastness to washing: The test instrument was a SW8A type color fastness to washing tester; the sample size was 20cm×20cm, the soaping temperature was 40±3℃, the liquor ratio was 1:20, and the time was 10min.

[0090] Light fastness: The test instrument was a YG(B)611-III type sunlight weathering tester; the wavelength of sunlight was 340nm, and the sunlight treatment was 48h.

[0091] Color fastness to rubbing: The instrument used for testing was a Y571W textile rubbing color fastness tester; the sample size was 20mm×100mm, the rubbing time was 10s, the number of rubbing cycles was 10, and the reciprocating stroke was 50mm.

[0092] Table 1. Test results of color fastness of unidirectional moisture-wicking thermal fabrics

[0093] Color fastness to soap washing Light fastness Dry rubbing color fastness Example 1 2 2 2 Example 2 4-5 5 5 Example 3 3-4 4 4 Example 4 2 3 3 Example 5 4 4-5 4-5 Example 6 4 4-5 4-5

[0094] This invention utilizes polyester and spandex in a weft-knit weave with a cotton-wool structure to create a fabric with a tight structure, excellent elasticity, good hand feel, and good moisture-wicking, perspiration-wicking, and warmth-retaining properties. However, fabrics woven from polyester and spandex suffer from problems such as poor color fastness, significant loss of elasticity, and creases.

[0095] A comparison of Example 2 and Example 1 reveals that the unidirectional moisture-wicking and warm fabric obtained in Example 2 exhibits excellent color fastness to washing, light, and dry rubbing. This may be because the dyed fabric in this application has poor color fastness and is prone to fading. Immersing the dyed fabric in a mixture of fumaric acid and vinyl silicone oil allows the dye to easily detach from the fabric and disperse in the mixture. Adding a crosslinking agent and initiator further reacts to form a dye molecular imprint. This molecular imprint is a three-dimensional network polymer, which firmly binds the detached dye to the fabric and effectively resists changes in the external environment. The dye is not easily washed away or faded, thus achieving a color-fixing effect. The unsaturated base material used in the post-treatment process of this application readily reacts chemically with the active groups on the fabric surface, forming a network structure on and inside the fabric. This three-dimensional network structure prevents wrinkling and deformation of the fabric and also has a color-fixing effect, preventing fading and discoloration, thereby ensuring the fabric color remains unchanged.

[0096] A comparison of Example 2 with Examples 5-6 revealed that the color fastness of Example 2 was significantly better than that of Examples 5-6. This may be because ethylene glycol dimethacrylate and isoprene tetraacrylate work synergistically to form a dense three-dimensional network structure, which allows the dye that has detached from the fabric to be firmly bound to the fabric and can effectively resist changes in the external environment. The dye is not easy to wash off or fade, and it has a color-fixing effect.

[0097] Test Example 2

[0098] Anti-wrinkle performance test:

[0099] The test was conducted in accordance with GB / T3819-1997 "Determination of Crease Resilience of Textiles - Recovery Angle Method".

[0100] Table 2. Test results of wrinkle resistance of unidirectional moisture-wicking thermal fabrics.

[0101] Reply angle (°) Example 1 101 Example 2 151 Example 3 139 Example 4 114

[0102] The post-processing process contains a large number of carboxyl and epoxy groups. Carboxyl groups can react chemically and hydrogen bond with hydroxyl and ester groups in the fabric. At the same time, the addition of fatty alcohol polyoxyethylene ether can effectively improve the penetration of active groups and form a cross-linked three-dimensional network structure inside and on the surface of the fabric, which restricts the relative slippage between macromolecules and gives the fabric wrinkle resistance. Meanwhile, the introduction of silicone oil improves the softness of the fabric.

[0103] Test Example 3

[0104] The fabric obtained in Example 1 was evaluated for its moisture absorption and quick-drying properties using the dynamic moisture transfer method according to the national standard GB / T 21655.2-2019 "Evaluation of Moisture Absorption and Quick-Drying Properties of Textiles - Part 2: Dynamic Moisture Transfer Method". The combined indicators of unidirectional transfer index and dynamic liquid water transfer index for both perspiration wicking and quick-drying properties met the national standard requirements before and after washing. The unidirectional transfer index was level 5 before and after washing, meeting the national standard requirement of ≥3 level. The dynamic liquid water transfer index was level 4 before and after washing, meeting the national standard requirement of ≥2 level.

[0105] This invention employs innovative yarn configuration, weaving process, and dyeing and finishing process to produce knitted fabrics that are soft to the touch, have excellent elasticity, and possess one-way moisture-wicking function, keeping the skin dry even after sweating. At the same time, they have good warmth retention and are comfortable to wear, making them especially suitable for spring and autumn.

Claims

1. A method for preparing a unidirectional moisture-wicking and thermally insulating fabric, characterized in that, This includes fabric preparation, fabric setting, dyeing, width opening, adding auxiliaries for fabric setting, napping, combing, shearing, and shaping. The preparation method of unidirectional moisture-wicking and thermal insulation fabric includes the following steps: Step 1, Greige Fabric: Using a double-sided circular knitting machine, polyester and spandex are knitted into greige fabric with a specific weave structure; Step 2, Blank setting: Arrange the blank obtained in step S1 in the shaping machine for blank setting; Step 3, dyeing: Add the above-mentioned greige fabric to the dye bath and heat it to 50-60℃ for 5-10 minutes. Then, carry out the dyeing process. Finally, take out the greige fabric, wash it with water, and dry it. Step 4, Opening the width: Perform opening and water-pressing treatment on the above fabric at a speed of 10 yards; Step 5, Adding additives and setting the blank: The above-mentioned blank fabric is sent into the setting machine for setting to obtain the set blank fabric; Step 6, napping: Use a napping machine to nap the reverse side of the above-mentioned fabric. Step 7, Combing: Use a combing machine to comb the side that has been brushed. Step 8, Shearing: Use a shearing machine to shear the hair on the side that has been combed above; Step 9, Shaping: The above-mentioned fabric is shaped using a shaping machine. After passing inspection, a one-way moisture-wicking and warm fabric is obtained. Following the staining process in step 3, a post-processing step is also included. The specific steps of the post-treatment method for the fabric are as follows: (1) Add 1-2g fumaric acid, 1-2g glycidyl methacrylate, 4-8g acetonitrile, and 1-6g fatty alcohol polyoxyethylene ether to 50-100g water, mix evenly, and ultrasonically treat for 5-10 minutes to obtain a fumaric acid mixture. (2) Add 3-6g of vinyl silicone oil and 1-4g of fatty alcohol polyoxyethylene ether to 20-50g of water and mix evenly to obtain a vinyl silicone oil mixture. (3) Add the fabric to the mixture of fumaric acid and vinyl silicone oil at a bath ratio of 1g:(30-60)mL and soak for 30-50min. Then add 0.5-2g of crosslinking agent and 0.1-1g of initiator and sonicate for 5-10min. Heat to 70-80℃ and react for 1-3h. After the reaction is completed, take out the fabric and dry it to obtain the post-treated fabric. The crosslinking agent is one or a mixture of ethylene glycol dimethacrylate, isoprene tetraacrylate, bisphenol A-dimethacrylate, neopentyl glycol diacrylate, and trimethylolpropane triacrylate.

2. The method for preparing the unidirectional moisture-wicking and thermal insulation fabric as described in claim 1, characterized in that, The specific structure described in step 1 is a weft-knitted plain knit structure with added yarn and a cotton-wool structure; the yarn configuration is two-way per cycle, with each way connected to polyester and spandex added.

3. The method for preparing the unidirectional moisture-wicking and thermal insulation fabric as described in claim 1, characterized in that, In step 3, the dyeing process involves maintaining the temperature at 45-55℃ for 5-10 minutes, then increasing the temperature at a rate of 1-2℃ / min to 70-90℃ for 30-50 minutes, increasing the temperature at a rate of 1-2℃ / min to 100-110℃ for 10-30 minutes, and finally increasing the temperature at a rate of 1-2℃ / min to 110-120℃ for 15- After 25 minutes, increase the temperature to 120-135℃ at a rate of 1-3℃ / min and react for 5-15 minutes. Finally, decrease the temperature to 95-105℃ at a rate of 0.5-1℃ / min, decrease the temperature to 60-80℃ at a rate of 1-2℃ / min, and decrease the temperature to 40-45℃ at a rate of 1-2℃ / min.

4. The method for preparing the unidirectional moisture-wicking and thermal insulation fabric as described in claim 1, characterized in that, In step 7, the combing process parameters are: straight needle speed 60-65 rpm, curved needle speed 60-65 rpm, and pre-tension 10-15 ypm.

5. The method for preparing the unidirectional moisture-wicking and thermal insulation fabric as described in claim 1, characterized in that, In step 8, the shearing process parameters are: speed 15-20 rpm, blade speed 800-900 rpm, and brush speed 40-50 rpm.

6. The method for preparing the unidirectional moisture-wicking and thermal insulation fabric as described in claim 1, characterized in that, The process parameters for the setting machine in step 9 are: temperature 150-160℃, machine speed 15-20m / min, frame 170-175cm, air volume 90-95 (upper) / 85-90 (lower), and overfeed 8-10%.

7. A one-way moisture-wicking and thermal insulation fabric, characterized in that, Prepared by the preparation method according to any one of claims 1-6.

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