Durable water-conducting fabric and preparation method thereof

Abstract

The present invention belongs to the field of textile finishing technology and relates to a durable water-conducting fabric and a preparation method thereof. The durable water-conducting fabric is a double-layer fabric, comprising a water-conducting channel and a water-repellent region; the inner layer of the water-conducting channel is weakly hydrophilic or hydrophobic, and the outer layer is super-hydrophilic; the inner and outer layers of the water-repellent region are both super-hydrophobic; the area of ​​the water-conducting channel accounts for 40-60%; a fabric with a hydrophilic and hydrophobic difference in the inner and outer layers or a fabric with both inner and outer layers being hydrophobic is used as the base fabric, and the durable water-conducting fabric is prepared after a series of treatments. The method of the present invention constructs a hydrophilic region and a hydrophobic region in the same plane of the fabric, which can effectively regulate the flow of liquid in the plane, avoid the accumulation of a large amount of sweat in a certain area to cause moisture saturation, and through different degrees of coating finishing, it can also ensure the wettability gradient in the thickness direction of the fabric, while ensuring that the fabric has the ability to regulate the liquid flow behavior both in the plane and out of the plane, and the fabric has excellent water washing fastness.

Description

Technical Field

[0001] The invention belongs to the technical field of textile finishing and relates to a durable water-conducting fabric and a preparation method thereof. Background Art

[0002] In the field of functional clothing, sweat management clothing has always been a hot topic of public concern. From natural fiber moisture-absorbing fabrics to synthetic fiber moisture-conducting fabrics, to modified moisture-absorbing and quick-drying fabrics, and finally to unidirectional moisture-conducting fabrics, the development of sweat-management fabrics is mainly based on the different wettability of the fabric, which can regulate the flow of sweat through the fabric. This includes using yarns with different hydrophilic and hydrophobic properties, changing the fabric structure design, and surface modification through dyeing and finishing processes to impart certain wettability to the fabric. Printed fabrics are currently the most common type of fabric in the clothing market. The numerous patterns on T-shirts, sweatshirts, and jackets worn in daily life are mostly created using printing technology, which can present a variety of pattern designs on the fabric through a convenient and simple process.

[0003] However, most common sweat-management fabrics currently on the market exhibit overall wettability, such as a fabric with both outer and inner layers being hydrophilic, a fabric with a hydrophilic outer layer and a weakly hydrophilic inner layer, or a fabric with a hydrophilic outer layer and a hydrophobic inner layer. These fabrics are characterized by exhibiting only one wettability on one side of the fabric, either absorbing sweat through the fabric's hydrophilicity or conducting sweat through a hydrophilic-hydrophobic wetting gradient between the inner and outer sides, with a focus on regulating liquid flow through the fabric's thickness. While these fabrics can effectively transport sweat from the inner skin surface to the outer surface of the garment, they have limitations in the case of high sweat volumes, as sweat accumulates and ultimately undergoes bidirectional transport within the fabric. This can lead to excessive sweat being unable to evaporate continuously and rapidly within the fabric, resulting in saturation and weakening the fabric's sweat-management capabilities. To further improve the sweat-management performance of fabrics during high-intensity sweating, it is necessary to propose surface modification methods that mitigate this saturation problem from the perspective of fabric wettability.

[0004] Although there are patents that rely on weaving methods to achieve the distribution of hydrophilic and hydrophobic yarns in fabrics, such as knitted fabrics and clothing with water-collecting function (ZL 202111144735.8), preparation method and clothing of directional water-conducting fabrics (ZL202210790535.8) and preparation method and clothing of directional water-conducting fabrics (ZL 2022 1 0790538.1), the weaving patterns are limited. For example, more lines, thinner lines, and complex patterns cannot be achieved; in addition, the printing plate and jacquard pattern color are added, and the production efficiency is low and unstable.

[0005] Therefore, it is of great significance to study a durable water-conducting fabric and a preparation method thereof to solve the problems existing in the prior art. Summary of the Invention

[0006] The purpose of the present invention is to solve the problems existing in the prior art and provide a durable water-conducting fabric and a preparation method thereof.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A durable water-conducting fabric is a double-layer fabric comprising a water-conducting channel and a water-repellent region. The inner layer of the water-conducting channel is weakly hydrophilic or hydrophobic, while the outer layer is super-hydrophilic (forming a wettability gradient from the inside out, allowing liquid to be transported unidirectionally from the inside out). Both the inner and outer layers of the water-repellent region are super-hydrophobic (perspiration does not wet this region, improving the durability of dryness).

[0009] Weakly hydrophilic means the water contact angle is 60°~90° (excluding 90°), hydrophobic means the water contact angle is 90°~140°, superhydrophilic means the water contact angle is 0°~5°, and superhydrophobic means the water contact angle is greater than 140°;

[0010] The area of ​​the water-conducting channel accounts for 40~60% in order to more effectively balance the flow of sweat and the overall evaporation performance of the fabric.

[0011] The present invention also provides a method for preparing a durable water-conducting fabric, comprising: using a fabric having inner and outer layers with different hydrophilic and hydrophobic properties as a base fabric; placing a mask on the inner layer of the base fabric in a plasma box (ensuring that the hydrophobicity of the inner layer is not affected); exposing the outer layer of the base fabric to the plasma; etching the outer layer of the base fabric; using a hydrophobic slurry as a printing slurry; and screen printing the etched outer layer of the base fabric. The areas covered by the printing slurry form water-repellent areas. The printing slurry penetrates from the outer layer to the inner layer, and the unprinted areas form hydrophilic patterns serving as water-conducting channels. A hydrophilic coating is then applied to the water-conducting channels by screen printing or spraying. Finally, the treated base fabric is dried and baked in sequence to produce the durable water-conducting fabric.

[0012] The inner layer of the base fabric has a water contact angle greater than 95°, while the outer layer has a water contact angle of 40° to 90°. For this type of fabric, when designing the in-plane liquid partitioning flow function, hydrophobic screen printing and hydrophilic coating are only performed on the side of the fabric with the smaller water contact angle. The hydrophobic slurry will penetrate to the other side under the pressure of the screen, and the penetration has no effect on the overall function of the fabric. At the same time, for this special fabric, before coating, the present invention uses plasma technology to etch the relatively hydrophilic side, making the surface exhibit super-hydrophilic wettability.

[0013] The plasma etching depth of the outer layer of the base fabric is 40~90%.

[0014] As the preferred technical solution:

[0015] The method for preparing a durable water-conducting fabric as described above, wherein the thickness of the base fabric is 0.5-0.8 mm, and the thickness of the durable water-conducting fabric is 0.05-0.08 mm thicker than that of the base fabric;

[0016] The outer layer of the base fabric is coolmax, coolmax and spandex, or cotton yarn; the inner layer of the base fabric is waterproof polyester, recycled polyester or waterproof nylon.

[0017] In the above-mentioned method for preparing a durable water-conducting fabric, the process parameters of the plasma treatment are: the power is set to 50-200 W; the gas is Ar added by 10-50% and O2 added by 50-90% (volume percentage); and the treatment time is 60-120 s.

[0018] In the method for preparing a durable water-conducting fabric as described above, the hydrophobic slurry is composed of a water-repellent agent, a thickener, a cross-linking agent, and deionized water, wherein the weight proportions of the components are: 20-30% water-repellent agent, 1.5-2.5% thickener, 5-7.5% cross-linking agent, and 60-73.5% deionized water;

[0019] When the hydrophilic coating is screen printed, the hydrophilic printing paste is composed of a hydrophilic agent, a thickener, a cross-linking agent and deionized water. The mass ratio of each component is: hydrophilic agent 10-30%, thickener 1.0-2.0%, cross-linking agent 2.5-7.5%, deionized water 60.5-86.5%;

[0020] When the hydrophilic coating is sprayed, the solution is composed of a hydrophilic agent, a cross-linking agent and deionized water, with the mass proportion of each component being: hydrophilic agent 10-30%, cross-linking agent 2-3%, and deionized water 67-88%.

[0021] In the preparation method of the durable water-conducting fabric as described above, the drying temperature is 65-90° C., and the time is 20-60 minutes; the baking temperature is 160-180° C., and the time is 30-90 seconds.

[0022] The present invention also provides another method for preparing a durable water-conducting fabric, which uses a fabric having both inner and outer layers that are hydrophobic as a base fabric. The outer and inner layers of the base fabric are subjected to the same partial masking. The outer layer of the base fabric is first subjected to plasma treatment, and the unmasked portion forms a water-conducting channel. The remaining portion is unaffected by the masking, thereby maintaining the original hydrophobicity. The water-conducting channel of the outer layer of the fabric is then coated with a hydrophilic coating by spraying. Finally, the treated base fabric is dried and baked in sequence to produce the durable water-conducting fabric.

[0023] The water contact angles of the inner and outer layers of the base fabric are both greater than 140°;

[0024] The plasma etching depth of the water-conducting channels on the outer layer of the base fabric is 40~90%.

[0025] As the preferred technical solution:

[0026] The method for preparing a durable water-conducting fabric as described above, wherein the thickness of the base fabric is 0.5-0.8 mm, and the thickness of the durable water-conducting fabric is 0.05-0.08 mm thicker than that of the base fabric;

[0027] The outer layer of the base fabric is recycled polyester, waterproof polyester or waterproof nylon, and the inner layer is waterproof polyester.

[0028] In the above-mentioned method for preparing a durable water-conducting fabric, the process parameters of the plasma treatment are: the power is set to 100-200 W; the gas is Ar added by 10-30%, and O2 added by 70-90%; the treatment time is 80-150 s.

[0029] In the preparation method of a durable water-conducting fabric as described above, the hydrophilic solution used in the hydrophilic coating is composed of a hydrophilic agent, a cross-linking agent and deionized water, and the mass proportions of each component are: hydrophilic agent 10-30%, cross-linking agent 2-3%, and deionized water 88-67%.

[0030] In the preparation method of the durable water-conducting fabric as described above, the drying temperature is 65-90° C., and the time is 20-60 minutes; the baking temperature is 160-180° C., and the time is 30-90 seconds.

[0031] Principle of the invention:

[0032] The prior art has proposed forming water channels by weaving, or by combining weaving and printing. However, relying solely on intarsia weaving on a flat knitting machine to form water channels is limited by knitting processing equipment and can only produce thick fabrics, which are not suitable for summer sports wear. Due to the complex weaving process, production efficiency is low. If it relies on jacquard weaving and printing, it is necessary to use a pattern, which is inconvenient to process. In actual production, it is difficult to align the printed pattern with the pattern of the jacquard fabric, which is time-consuming and has a high defective rate. In addition, the prior art usually applies a hydrophobic coating to the hydrophilic surface. Although the effect of zoned water diversion can be achieved in a short period of time, the water diversion effect will quickly fail as time goes by and the amount of sweat increases, and the liquid diffuses throughout the fabric.

[0033] The design concept of the present invention is mainly aimed at high-intensity sweating, where sweat is continuously and in large quantities produced from the human body surface, completely saturating the clothing. Although existing sportswear has the functions of being light, quick-drying, or unidirectionally conducting moisture, these are only effective when sweating in small amounts. For heavy sweating, if the fabric is too thin, it will still wet and quickly saturate. Therefore, the fabric needs to have a certain thickness to support the skin and the external environment. At the same time, the distribution of hydrophilic and hydrophobic regions in the clothing can provide different sweat management effects for different parts of the human body, disperse the flow direction of sweat, and alleviate the problem of fabric moisture absorption and saturation. To improve the effectiveness of high-intensity sweat flow in the fabric, it is important to ensure that the hydrophobic regions are sufficiently hydrophobic. Because the fabric substrate itself is a porous medium, it will rely on the capillary wicking force of the fiber yarns, combined with the action of external forces, to absorb liquid into the fabric, which will wet the fabric over time. When the fabric is very hydrophobic, the wicking force between the fiber yarns is less than the hydrophobic force itself, and sweat will be absorbed by the stronger force of the hydrophilic region, which can keep the hydrophobic region dry for a longer period of time. The durable water-conducting fabric of the present invention comprises a water-conducting channel and a water-repellent region. The inner layer of the water-conducting channel is weakly hydrophilic or hydrophobic, while the outer layer is super-hydrophilic. Both the inner and outer layers of the water-repellent region are super-hydrophobic. This specially designed fabric structure ensures that the water-repellent region is highly hydrophobic while the water-conducting channel is highly hydrophilic, effectively guiding sweat absorption and flow through the water-conducting channel while preventing it from wetting the water-repellent region.

[0034] The present invention introduces specific functional groups onto the surface of the fiber after etching the fabric surface with plasma, thereby changing the surface free energy of the fiber. For example, after treatment with oxygen and argon or oxygen and nitrogen, active groups such as carboxyl, amino, and carbonyl are introduced, improving the wettability of the fiber surface. On the other hand, since singlet oxygen atoms have high energy, electrons and ions in the plasma etch the fiber surface with high kinetic energy under their action, increasing the roughness of the fiber surface and creating obvious protrusions. This increases the specific surface area of ​​the fiber and improves its water absorption. At the same time, due to the significant improvement in its surface wettability and roughness, when using a coating additive, it is beneficial to spread the slurry on the fiber surface, thereby increasing the contact between the material and the additive. The introduction of polar functional groups can also directly participate in the crosslinking of the slurry, forming a covalent bond, further significantly improving the surface adhesion of the fabric, thereby enhancing the washing fastness of the coated fabric.

[0035] Beneficial effects:

[0036] (1) The method for preparing a durable water-conducting fabric of the present invention has a preparation process that does not discharge hazardous waste, is environmentally friendly and pollution-free, has a clear process, and is simple and easy to operate; the shape of the print can be wider and is not limited to the print pattern in the embodiment.

[0037] (2) The present invention provides a method for preparing a durable water-conducting fabric. By modifying the hydrophilic and hydrophobic surfaces, a hydrophilic area and a hydrophobic area are constructed in the same plane of the fabric. This can effectively regulate the partitioned flow of liquid in the plane, and avoid the accumulation of a large amount of sweat in a certain area to cause moisture saturation. Furthermore, by coating the fabric to different degrees, a wettability gradient in the thickness direction of the fabric can be ensured, and at the same time, the fabric can be guaranteed to have the ability to regulate the flow behavior of liquid both in the plane and out of the plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of the preparation process of Examples 1 to 3 of the present invention.

[0039] Figure 2 This is an SEM image of the surface of the base fabric of Example 1 before plasma treatment.

[0040] Figure 3 This is the SEM image of the base fabric of Example 1 after plasma treatment.

[0041] Figure 4 This is the SEM image of the base fabric of Example 1 after screen printing coating.

[0042] Figure 5 The flow pattern of liquid when water is injected into the outer layer of the fabric prepared in Example 1.

[0043] Figure 6 The flow behavior of the droplets when water is dripped from the inner layer to the outer layer of the fabric prepared in Example 1.

[0044] Figure 7 The fabric prepared in Example 1 shows the flow behavior of the outer layer liquid when water is sprayed from the inner layer to the outer layer.

[0045] Figure 8 The fabric prepared in Example 1 is sprayed from the outer layer and the inner layer respectively, and the liquid flow behavior on the surface is shown.

[0046] Figure 9 The figure is a force analysis diagram of the liquid flow in the hydrophilic and hydrophobic areas; where HIF is the capillary force in the hydrophilic area, HOF is the surface force in the hydrophobic area, G is the droplet gravity, and △P is the Laplace pressure difference.

[0047] Figure 10 This is the SEM image of the base fabric of Example 4 before plasma treatment.

[0048] Figure 11 This is the SEM image of the base fabric after plasma treatment in Example 4;

[0049] Figure 12 This is a schematic diagram of the structure of a durable water-conducting fabric;

[0050] Among them, 1-outer layer, 2-inner layer, 3-water-conducting channel, 4-water-repellent area. DETAILED DESCRIPTION

[0051] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0052] The test methods involved in the performance indicators of the present invention are as follows:

[0053] Water repellency level: tested in accordance with GB / T 4745-2012 Textiles - Testing and evaluation of water repellency - water dipping method.

[0054] A real-person wear test involved sewing a durable water-conducting fabric onto the inner layer of a commercially available sports T-shirt. Subjects wore the experimental garments and completed a running experiment. The subjects ran on a treadmill, controlling their speed and duration to create a sweating scenario with a rate of 2,000 to 4,000 g / h. After the run, the wetting state of the durable water-conducting fabric samples was observed. The samples were removed from the wearer's body and allowed to rest for two minutes. The samples were then photographed using an infrared thermal imager to reveal the wetting state of the water-conducting fabric samples.

[0055] Washing procedures: Similar to everyday washing methods, place the sample and accompanying laundry in the washing machine drum, set the wash mode to "Quick Wash," and wash for 15 minutes. The sample is then dried at 60°C. Contact angle tests are then conducted to determine changes in the hydrophilicity and hydrophobicity of the sample after one, three, and five washes.

[0056] Water contact angle: Measured using a contact angle tester. The specific test method is as follows: Open the contact angle tester and connect it to the software on your computer. Place the sample to be tested on the tester's sample table, with the test surface facing up. Once the test is started, the tester will automatically drip liquid, with each test dripping 5μL. When the liquid drips onto the fabric surface, the same pattern will appear on the software interface. Analyze the contact angle according to the software's instructions.

[0057] Sources of some substances of the present invention:

[0058] Waterproofing agent: Manufacturer: Shanghai Fulu Fine Chemical Co., Ltd., Brand: Teflon three-proof finishing agent.

[0059] Thickener: Manufacturer: Guangzhou Runhong Chemical Co., Ltd., brand: ASE60.

[0060] Cross-linking agent: Manufacturer: Dongguan Enke Chemical Co., Ltd., brand: BEW-N.

[0061] Hydrophilic agent: Manufacturer: Dongguan Enke Chemical Co., Ltd., brand: HIT HPN50-S.

[0062] Example 1

[0063] A method for preparing a durable water-conducting fabric, such as Figure 1 The specific steps are as follows:

[0064] (1) Plasma treatment;

[0065] The base fabric is a fabric with different hydrophilic and hydrophobic properties on the inner and outer layers. The thickness of the base fabric is 0.5 mm and the weight is 150 g / m 2 The outer layer is 50wt% Coolmax and 6wt% spandex, with a water contact angle of 68°, and the inner layer is 44wt% waterproof polyester, with a water contact angle of 140.5°. The inner layer mask of the base fabric is placed in a plasma box, and the outer layer of the base fabric is exposed to the plasma to etch the outer layer of the base fabric. The process parameters of the plasma treatment are: the power is set to 100W; the gas is 50% Ar and 50% O2; the treatment time is 60s; the plasma etching depth of the outer layer of the fabric is 40%;

[0066] (2) Screen printing (hydrophobic coating);

[0067] A hydrophobic slurry is used as the printing slurry. Screen printing is performed on the outer layer of the etched base fabric using a hard scraper with a scraping stroke of 12 times. The area covered by the printing slurry forms a water-repellent area, and the printing slurry penetrates from the outer layer to the inner layer. The hydrophobic slurry is composed of a water repellent, a thickener, a cross-linking agent, and deionized water. The weight proportions of each component are: water repellent 30%, thickener 2%, cross-linking agent 7.5%, and deionized water 60.5%.

[0068] (3) Screen printing (hydrophilic coating);

[0069] The unprinted area forms a hydrophilic pattern as a water channel, and a hydrophilic coating is applied on this water channel by screen printing. The hydrophilic slurry used in the hydrophilic coating is composed of a hydrophilic agent, a thickener, a cross-linking agent, and deionized water. The weight ratio of each component is: hydrophilic agent 20%, thickener 1%, cross-linking agent 3%, and deionized water 76%;

[0070] (4) The treated base fabric was dried at 70°C for 20 min and baked at 160°C for 1 min to obtain a durable water-conducting fabric.

[0071] The thickness of the final durable water-conducting fabric is 0.05 mm thicker than that of the base fabric; Figure 12 As shown, the durable water-conducting fabric is a double-layer fabric, including a water-conducting channel 3 and a water-repellent region 4, with the water-conducting channel 3 accounting for 55% of the area. The inner layer 2 of the water-conducting channel 3 is hydrophobic, with a water contact angle of 125°, and the outer layer 1 is superhydrophilic, with a water contact angle of 0°. The inner and outer layers of the water-repellent region 4 are both superhydrophobic, with water contact angles of 147° and 144°, respectively. The durable water-conducting fabric has a water-repellency rating of 4. In real-life wear tests, under conditions of heavy sweating (a sweating rate of 2000 g / h), the durable water-conducting fabric gained 12% weight after 15 minutes. After five washes, the water-conducting channel still exhibited high hydrophilicity, with a contact angle maintained between 0 and 5°. The water contact angle of the inner layer of the water-repellent region decreased by 8%, from 147° to 135°, and the water contact angle of the outer layer decreased by 8.3%, from 144° to 132°.

[0072] Figure 2 This is the SEM image of the base fabric surface before plasma treatment. The surface is relatively smooth except for a few bumps where the fabric is dirty. Figure 3 This is the SEM image of the base fabric after plasma treatment. The surface is uneven and has many protrusions. Figure 4 This is the SEM image of the plasma-treated fabric after screen printing coating. Due to the scraping effect of the scraper, the surface smoothness of the fabric is significantly improved.

[0073] In this embodiment, after plasma treatment and hydrophobic and hydrophilic coating, tree-like hydrophilic water-conducting channels and hydrophobic areas are constructed in the fabric plane, so that the liquid conducted from the inner layer to the outer layer can be directionally transported along the water-conducting channels, and the flow direction of the liquid can be regulated according to the pattern shape. Figure 5 When water is injected into the outer layer of the fabric, the liquid flows along the designed tree-like branch channels and will not diffuse into the surrounding hydrophobic areas; at the same time, this preparation method will not affect the ability of the liquid to conduct from the inner layer to the outer layer of the fabric.

[0074] Figure 6 This is the flow behavior of the liquid in the inner and outer layers when water drips from the inner layer to the outer layer of the fabric. When the droplet falls on the hydrophilic channel, it will quickly penetrate into the outer layer and diffuse along the hydrophilic channel in the outer layer. When the droplet falls on the hydrophobic area, due to the strong hydrophobicity, the droplet will not penetrate into the outer layer.

[0075] Figure 7 This is an experimental diagram showing that when water is sprayed from the inner layer to the outer layer of the fabric, the liquid is conducted from the inside to the outside and flows along the tree-like channels in the outer layer. Figure 5 、 Figure 6 exhibit the same flow behavior.

[0076] Figure 8The wetting conditions of the two surfaces when spraying water from the outer layer to the inner layer and from the inner layer to the outer layer respectively are: when spraying from the outer layer to the inner layer, the liquid flows along the water guide channel of the outer layer and does not diffuse to the hydrophobic area. The spraying point of the hydrophobic area is slightly wet, and due to the hydrophobicity of the inner layer, the liquid does not penetrate into the inner layer; when spraying from the inner layer to the outer layer, the liquid penetrates into the outer layer and flows along the water guide channel. The spraying point of the hydrophobic area of ​​the inner layer is wet.

[0077] Figure 9 This is a force analysis diagram of liquid in the hydrophilic and hydrophobic areas. When the liquid is in the hydrophilic area of ​​the inner layer of the fabric, it is affected by the capillary force of the hydrophilic yarn and, combined with gravity, guides the liquid to the outer layer and flows along the water-conducting channel. When the liquid is in the hydrophobic area, the surface force of the hydrophobic area prevents the liquid from penetrating and diffusing.

[0078] Example 2

[0079] A method for preparing a durable water-conducting fabric, comprising the following steps:

[0080] (1) Plasma treatment;

[0081] The base fabric is a fabric with different hydrophilic and hydrophobic properties on the inner and outer layers. The thickness of the base fabric is 0.55mm and the weight is 141g / m 2 The outer layer is 57wt% Coolmax and 5wt% spandex, with a water contact angle of 45°, and the inner layer is 38wt% recycled polyester, with a water contact angle of 117.5°. The inner layer mask of the base fabric is placed in a plasma box, and the outer layer of the base fabric is exposed to the plasma to etch the outer layer of the base fabric. The process parameters of the plasma treatment are: the power is set to 150W; the gas is 50% Ar and 50% O2; the treatment time is 90s; the plasma etching depth of the outer layer of the fabric is 50%;

[0082] (2) Screen printing (hydrophobic coating);

[0083] A hydrophobic slurry is used as the printing slurry. Screen printing is performed on the outer layer of the etched base fabric using a hard scraper with a stroke of 12 blades. The area covered by the printing slurry forms a water-repellent area, and the printing slurry penetrates from the outer layer to the inner layer. The hydrophobic slurry is composed of a water repellent, a thickener, a cross-linking agent, and deionized water. The weight proportions of each component are: water repellent 20%, thickener 2.5%, cross-linking agent 7.5%, and deionized water 70%.

[0084] (3) Screen printing (hydrophilic coating);

[0085] The unprinted area forms a hydrophilic pattern as a water channel, and a hydrophilic coating is applied on this water channel by screen printing. The hydrophilic slurry used in the hydrophilic coating is composed of a hydrophilic agent, a thickener, a cross-linking agent, and deionized water. The weight proportions of each component are: hydrophilic agent 10%, thickener 1%, cross-linking agent 2%, and deionized water 87%;

[0086] (4) drying the treated base fabric at 70°C for 30 min and baking at 160°C for 60 s to obtain a durable water-conducting fabric;

[0087] The thickness of the final durable water-conducting fabric is 0.06mm thicker than the base fabric. The durable water-conducting fabric is a double-layer fabric, including a water-conducting channel and a water-repellent area, with the water-conducting channel area accounting for 60%. The inner layer of the water-conducting channel is weakly hydrophilic with a water contact angle of 85°, and the outer layer is super hydrophilic with a water contact angle of 0°. The inner and outer layers of the water-repellent area are both super hydrophobic, with water contact angles of 140° and 142° respectively. The durable water-conducting fabric has a water repellency rating of 5. ; After real-person wear tests, under the condition of heavy sweating (sweating rate of 3500g / h), the durable water-conducting fabric gained 12.5% ​​weight after 15 minutes; after being washed five times, the water-conducting channel still showed a high degree of hydrophilicity, and the contact angle remained at 0~5°. The contact angle of the inner layer of water in the water-repellent area decreased from 140° to 132°, a decrease of 5.7%, and the contact angle of the outer layer of water decreased from 142° to 134.5°, a decrease of 5.3%.

[0088] Example 3

[0089] A method for preparing a durable water-conducting fabric, comprising the following steps:

[0090] (1) Plasma treatment;

[0091] The base fabric is a fabric with different hydrophilic and hydrophobic properties on the inner and outer layers. The thickness of the base fabric is 0.6 mm and the weight is 160 g / m 2 The outer layer is cotton yarn with a water contact angle of 73°, and the inner layer is waterproof nylon with a water contact angle of 132.7°. The inner layer mask of the base fabric is placed in the plasma box, and the outer layer of the base fabric is exposed to the plasma to etch the outer layer of the base fabric. The process parameters of the plasma treatment are: the power is set to 100W; the gas is Ar added by 20% and O2 added by 80%; the treatment time is 120s; the plasma etching depth of the outer layer of the fabric is 70%;

[0092] (2) Screen printing (hydrophobic coating);

[0093] A hydrophobic slurry is used as the printing slurry. Screen printing is performed on the outer layer of the etched base fabric using a hard scraper with a stroke of 12 blades. The area covered by the printing slurry forms a water-repellent area, and the printing slurry penetrates from the outer layer to the inner layer. The hydrophobic slurry is composed of a water repellent, a thickener, a cross-linking agent, and deionized water. The weight proportions of each component are: water repellent 20%, thickener 1.5%, cross-linking agent 5%, and deionized water 73.5%.

[0094] (3) Screen printing (hydrophilic coating);

[0095] The unprinted area forms a hydrophilic pattern as a water channel, and a hydrophilic coating is applied on this water channel by screen printing. The hydrophilic slurry used in the hydrophilic coating is composed of a hydrophilic agent, a thickener, a cross-linking agent, and deionized water. The weight proportions of each component are: hydrophilic agent 10%, thickener 1.5%, cross-linking agent 2%, and deionized water 86.5%;

[0096] (4) The treated base fabric was dried at 90°C for 20 min and baked at 180°C for 30 s to obtain a durable water-conducting fabric.

[0097] The thickness of the final durable water-conducting fabric is 0.065mm thicker than that of the base fabric. The durable water-conducting fabric is a double-layer fabric, including a water-conducting channel and a water-repellent area, with the water-conducting channel area accounting for 45%; the inner layer of the water-conducting channel is hydrophobic with a water contact angle of 110°, and the outer layer is superhydrophilic with a water contact angle of 3°; the inner and outer layers of the water-repellent area are both superhydrophobic, with water contact angles of 143° and 141.7° respectively; the durable water-conducting fabric has a water repellency rating of 4 After real-life wear tests, under conditions of heavy sweating (a sweating rate of 3000g / h), the durable water-conducting fabric gained 13.1% weight after 15 minutes. After five washes, the water-conducting channel still exhibited high hydrophilicity, with the contact angle maintained at 0-5°. The contact angle of the inner layer of water in the water-repellent area decreased from 143° to 135°, a decrease of 5.6%, and the contact angle of the outer layer of water decreased from 141.7° to 135°, a decrease of 4.7%.

[0098] Example 4

[0099] A method for preparing a durable water-conducting fabric, comprising the following steps:

[0100] (1) Plasma treatment;

[0101] like Figure 10 As shown, a hydrophobic fabric with both inner and outer layers is used as the base fabric. The thickness of the base fabric is 0.65 mm and the weight is 135 g / m 2The outer layer is recycled polyester, the inner layer is waterproof polyester, and the water contact angles of the outer and inner layers are 140.5° and 144.7° respectively; the outer and inner layers of the base fabric are both partially masked, and the outer layer of the base fabric is plasma treated, and the unmasked part forms a water channel. The SEM image after plasma treatment is shown as follows Figure 11 As shown in the figure, the process parameters of plasma treatment are as follows: the power is set to 200W; the gas is Ar added by 10% and O2 added by 90%; the treatment time is 120s; the plasma etching depth of the water-conducting channel on the outer layer of the fabric is 85%;

[0102] (2) Hydrophilic coating;

[0103] Applying a hydrophilic coating to the water-conducting channels on the outer layer of the base fabric using a spray gun;

[0104] The hydrophilic solution used in the hydrophilic coating is composed of a hydrophilic agent, a cross-linking agent, and deionized water. The mass proportions of the components are: hydrophilic agent 20%, cross-linking agent 2%, and deionized water 78%.

[0105] (3) The base fabric treated with the hydrophilic coating was dried at 80°C for 30 min and baked at 165°C for 60 s to obtain a durable water-conducting fabric.

[0106] The thickness of the final durable water-conducting fabric is 0.055mm thicker than that of the base fabric. The durable water-conducting fabric is a double-layer fabric, including a water-conducting channel and a water-repellent area, with the water-conducting channel area accounting for 58%; the inner layer of the water-conducting channel is hydrophobic with a water contact angle of 96°, and the outer layer is superhydrophilic with a water contact angle of 0.5°; the inner and outer layers of the water-repellent area are both superhydrophobic, with water contact angles of 144.7° and 140.5° respectively; the water-repellent grade of the durable water-conducting fabric is Level 4: After real-life wear tests, under conditions of heavy sweating (a sweating rate of 4000g / h), the durable water-conducting fabric gained 14.3% weight after 15 minutes. After five washes, the water-conducting channel still exhibited high hydrophilicity, with the contact angle maintained at 0-5°. The inner water contact angle in the water-repellent area decreased from 144.7° to 139°, a decrease of 3.9%, and the outer water contact angle decreased from 140.5° to 131°, a decrease of 6.8%.

[0107] Example 5

[0108] A method for preparing a durable water-conducting fabric, comprising the following steps:

[0109] (1) Plasma treatment;

[0110] The base fabric is a hydrophobic fabric with an inner and outer layer. The thickness of the base fabric is 0.7mm and the weight is 145g / m 2The outer layer is waterproof polyester, and the inner layer is waterproof polyester. The water contact angles of the outer and inner layers are 142° and 145°, respectively. The outer and inner layers of the base fabric are both partially masked. The outer layer of the base fabric is plasma treated, and the unmasked part forms a water channel. The process parameters of the plasma treatment are: the power is set to 150W; the gas is 30% Ar and 70% O2; the treatment time is 100s; the plasma etching depth of the water channel on the outer layer of the fabric is 77%;

[0111] (2) Hydrophilic coating;

[0112] Applying a hydrophilic coating to the water-conducting channels on the outer layer of the base fabric using a spray gun;

[0113] The hydrophilic solution used in the hydrophilic coating is composed of a hydrophilic agent, a cross-linking agent, and deionized water. The mass proportions of the components are: hydrophilic agent 20%, cross-linking agent 3%, and deionized water 77%;

[0114] (3) The base fabric treated with the hydrophilic coating was dried at 65°C for 60 min and baked at 160°C for 90 s to obtain a durable water-conducting fabric.

[0115] The thickness of the final durable water-conducting fabric is 0.067mm thicker than the base fabric. The durable water-conducting fabric is a double-layer fabric, including a water-conducting channel and a water-repellent area, with the water-conducting channel area accounting for 45%; the inner layer of the water-conducting channel is hydrophobic with a water contact angle of 121°, and the outer layer is superhydrophilic with a contact angle of 2°; the inner and outer layers of the water-repellent area are both superhydrophobic, with water contact angles of 145° and 142° respectively; the durable water-conducting fabric has a water repellency rating of 5 After real-life wear tests, under conditions of heavy sweating (a sweating rate of 3500g / h), the durable water-conducting fabric gained 10.9% weight after 15 minutes. After five washes, the hydrophilic water-conducting area still exhibited high hydrophilicity, with the contact angle maintained at 0~5°. The inner water contact angle of the hydrophobic area decreased from 145° to 139°, a decrease of 4.1%, and the outer water contact angle decreased from 142° to 136°, a decrease of 4.2%.

[0116] Example 6

[0117] A method for preparing a durable water-conducting fabric, comprising the following steps:

[0118] (1) Plasma treatment;

[0119] The base fabric is a hydrophobic fabric with an inner and outer layer. The thickness of the base fabric is 0.59mm and the weight is 155g / m 2The outer layer is waterproof nylon, and the inner layer is waterproof polyester. The water contact angles of the outer and inner layers are 143.5° and 146.2°, respectively. The outer and inner layers of the base fabric are both partially masked. The base fabric is then plasma treated, and water channels are formed in the unmasked areas. The plasma treatment process parameters are as follows: the power is set to 180W; the gas is Ar added at 20% and O2 added at 80%; the treatment time is 80s; and the plasma etching depth of the outer layer of the fabric is 90%.

[0120] (2) Hydrophilic coating;

[0121] Applying a hydrophilic coating to the water-conducting channels on the outer layer of the base fabric using a spray gun;

[0122] The hydrophilic solution used in the hydrophilic coating is composed of a hydrophilic agent, a cross-linking agent, and deionized water. The mass proportions of the components are: hydrophilic agent 15%, cross-linking agent 3%, and deionized water 82%;

[0123] (3) The base fabric treated with the hydrophilic coating was dried at 90°C for 20 min and baked at 180°C for 30 s to obtain a durable water-conducting fabric.

[0124] The thickness of the final durable water-conducting fabric is 0.077mm thicker than that of the base fabric. The durable water-conducting fabric is a double-layer fabric, including a water-conducting channel and a water-repellent area, with the water-conducting channel area accounting for 40%. The inner layer of the water-conducting channel is weakly hydrophilic with a water contact angle of 68°, and the outer layer is super hydrophilic with a water contact angle of 0°. The inner and outer layers of the water-repellent area are both super hydrophobic, with water contact angles of 146.2° and 143.5° respectively. The durable water-conducting fabric has a water repellency rating of 5. After real-life wear tests, under conditions of heavy sweating (a sweating rate of 3000g / h), the durable water-conducting fabric gained 12.3% weight after 15 minutes. After five washes, the water-conducting channel still exhibited high hydrophilicity, with the contact angle maintained at 0~5°. The contact angle of the inner layer of water in the water-repellent area decreased from 146.2° to 139°, a decrease of 4.9%, and the contact angle of the outer layer of water decreased from 143.5° to 137°, a decrease of 4.5%.

Claims

1. A durable water-conducting fabric, characterized in that: It is a double-layer fabric, including a water-conducting channel and a water-repellent area; the inner layer of the water-conducting channel is weakly hydrophilic or hydrophobic, and the outer layer is super-hydrophilic; the inner and outer layers of the water-repellent area are both super-hydrophobic; Weakly hydrophilic means the water contact angle is 60° to 90°, hydrophobic means the water contact angle is 90° to 140°, superhydrophilic means the water contact angle is 0° to 5°, and superhydrophobic means the water contact angle is greater than 140°; The area of ​​the water channel accounts for 40% to 60%.

2. The method for preparing a durable water-conducting fabric according to claim 1, wherein: A fabric with both inner and outer hydrophobic layers is used as a base fabric. Both the outer and inner layers of the base fabric are partially masked. The outer layer of the base fabric is first treated with plasma to form water-conducting channels in the unmasked portion. A hydrophilic coating is then applied to the water-conducting channels on the outer layer of the fabric by spraying. Finally, the treated base fabric is dried and baked in sequence to produce a durable water-conducting fabric. The water contact angles of the inner and outer layers of the base fabric are both greater than 140°; The plasma etches the water-conducting channels of the outer layer of the base fabric to a depth of 40 to 90%.

3. The method for preparing a durable water-conducting fabric according to claim 2, wherein: The thickness of the base fabric is 0.5 to 0.8 mm, and the thickness of the durable water-conducting fabric is 0.05 to 0.08 mm thicker than that of the base fabric; The outer layer of the base fabric is recycled polyester, waterproof polyester or waterproof nylon, and the inner layer is waterproof polyester.

4. The method for preparing a durable water-conducting fabric according to claim 2, wherein: The process parameters of the plasma treatment are: the power is set to 100-200W; the gas is Ar added by 10-30%, and O2 added by 70-90%; the treatment time is 80-150s.

5. The method for preparing a durable water-conducting fabric according to claim 2, wherein: The hydrophilic solution used in the hydrophilic coating is composed of a hydrophilic agent, a cross-linking agent and deionized water, with the mass proportion of each component being: 10-30% of the hydrophilic agent, 2-3% of the cross-linking agent and 67-88% of the deionized water.

6. The method for preparing a durable water-conducting fabric according to claim 2, wherein: The drying temperature is 65-90°C and the time is 20-60 minutes; the baking temperature is 160-180°C and the time is 30-90 seconds.

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