Durable water-guiding fabric and preparation method thereof

Abstract

The invention belongs to the technical field of textile finishing, and relates to a durable water-guiding fabric and a preparation method thereof.The durable water-guiding fabric is a double-layer fabric and comprises a water-guiding channel and a water-repellent area; the inner layer of the water guide channel is weakly hydrophilic or hydrophobic, and the outer layer of the water guide channel is super-hydrophilic; the inner layer and the outer layer of the water-repellent area are super-hydrophobic; the area ratio of the water guide channel is 40-60%; fabric with the inner layer and the outer layer having hydrophilic and hydrophobic differences or fabric with the inner layer and the outer layer being hydrophobic serves as base fabric, and the durable water guide fabric is obtained after a series of treatment. According to the method, the hydrophilic area and the hydrophobic area are constructed in the same plane of the fabric, flowing of liquid in the plane can be effectively regulated and controlled, moisture absorption saturation caused by gathering of a large amount of sweat in a certain area is avoided, the wettability gradient of the fabric in the thickness direction can also be guaranteed through coating finishing of different degrees, and the wettability of the fabric is improved. Meanwhile, it is guaranteed that the fabric has the capacity of regulating and controlling the liquid flowing behavior inside and outside the plane, and the fabric is excellent in 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 one of the hot topics 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 performance of different wettability in fabrics, which can regulate the flow of sweat in fabrics, including using yarns with different hydrophilic and hydrophobic properties, changing fabric structure design, and surface modification through dyeing and finishing processes to give fabrics certain wettability performance. Printed fabrics are the most common fabrics in the current clothing market. Most of the patterns in T-shirts, sweatshirts, and jackets worn in daily life are realized by printing technology, and a variety of pattern designs can be presented in fabrics through convenient and simple processes.

[0003] However, the common sweat management fabrics in the market are mostly overall wettability performance, such as the outer and inner layers of the fabric are hydrophilic, or the outer layer of the fabric is hydrophilic and the inner layer is weakly hydrophilic, or the outer layer of the fabric is hydrophilic and the inner layer is hydrophobic, etc. The characteristics of these fabrics are that they only show one wettability on one side of the fabric, absorb sweat through the hydrophilicity of the fabric, or conduct sweat through the hydrophilic and hydrophobic wetting gradients on the inside and outside, focusing on regulating the liquid flow behavior in the thickness direction of the fabric. This type of fabric can solve the problem of effectively transporting sweat from the inner skin surface to the outer surface of the clothing, but in the case of a large amount of sweat, the sweat will eventually be transported in both directions in the fabric after accumulation, which has certain limitations. Excessive sweat will not be able to evaporate continuously and quickly in the fabric, resulting in moisture saturation and weakening the sweat management ability of the fabric. In order to further improve the sweat management performance of fabrics during high-intensity sweating, it is necessary to propose surface modification methods from the perspective of fabric wettability to slow down the problem of fabric moisture saturation.

[0004] Although there are patents that rely on weaving methods to achieve the distribution of hydrophilic and hydrophobic yarns in fabrics, for example, knitted fabrics and clothing with water collection 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 matching 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] 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, 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 (forming a wettability gradient from the inside to the outside, and liquid can be transported unidirectionally from the inside to the outside); the inner layer and the outer layer of the water-repellent area are both super-hydrophobic (sweat does not wet this area, improving the durability of dryness);

[0009] Weakly hydrophilic means that the water contact angle is 60°~90° (excluding 90°), hydrophobic means that the water contact angle is 90°~140°, super hydrophilic means that the water contact angle is 0°~5°, and super hydrophobic means that 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, which comprises using a fabric with a difference in hydrophilicity and hydrophobicity between the inner and outer layers as a base fabric, placing an inner layer mask 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 performing screen printing on the outer layer of the etched base fabric, so that the area covered by the printing slurry forms a water-repellent area, the printing slurry penetrates from the outer layer to the inner layer, and the unprinted area forms a hydrophilic pattern as a water-conducting channel, and then performing a hydrophilic coating on the water-conducting channel by screen printing or spraying, and finally drying and baking the treated base fabric in sequence to obtain a durable water-conducting fabric;

[0012] The inner layer water contact angle of the base fabric is greater than 95°, and the outer layer water contact angle is 40°~90°. For this kind of fabric, when designing the in-plane liquid partition flow function, the hydrophobic screen printing and hydrophilic coating are only performed on the side of the fabric with a 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 etches the relatively hydrophilic side by using plasma technology, so that the surface exhibits 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 method for preparing a durable water-conducting fabric as described above, the process parameters of plasma treatment are: the power is set to 50~200W; the gas is Ar added by 10~50%, and O2 added by 50~90% (volume percentage); the treatment time is 60~120s.

[0018] In the method for preparing a durable water-conducting fabric as described above, the hydrophobic slurry is composed of a waterproofing agent, a thickener, a cross-linking agent and deionized water, and the weight proportions of the components are: 20-30% of the waterproofing agent, 1.5-2.5% of the thickener, 5-7.5% of the cross-linking agent, and 60-73.5% of the 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, and 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, and the mass proportion of each component is: hydrophilic agent 10~30%, cross-linking agent 2~3%, deionized water 67~88%.

[0021] In the method for preparing a durable water-conducting fabric as described above, the drying temperature is 65-90°C, the time is 20-60 minutes, and the baking temperature is 160-180°C, 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 with both inner and outer layers being hydrophobic as a base fabric, performs the same partial masking on the outer and inner layers of the base fabric, firstly performs plasma treatment on the outer layer of the base fabric, forms a water-conducting channel on the unmasked portion, and the remaining portion is not affected by the masking, thereby ensuring the original hydrophobicity, then performs a hydrophilic coating on the water-conducting channel on the outer layer of the fabric by spraying, and finally sequentially dries and bakes the treated base fabric to obtain a 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 method for preparing a durable water-conducting fabric as described above, the process parameters of 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.

[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 proportion of each component is: hydrophilic agent 10~30%, cross-linking agent 2~3%, deionized water 88~67%.

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

[0031] Principle of the invention:

[0032] The prior art has proposed to form a water channel by weaving, or to form a water channel by combining weaving and printing. However, relying entirely on intarsia weaving of a flat knitting machine to form a water channel 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, the production efficiency is low; if it relies on jacquard weaving and printing, it is necessary to set the 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 has a high time cost and a high defective rate. In addition, the prior art usually applies a hydrophobic coating to the hydrophilic surface. Although the effect of zoned water conduction can be reflected in a short period of time, the water conduction effect will quickly fail with the extension of time and the increase of sweat, and the liquid will diffuse throughout the fabric.

[0033] The design concept of the present invention is mainly aimed at the situation of high-intensity sweating, and sweat is continuously produced from the human body surface in large quantities, completely soaking the clothing. Although the existing sportswear has the function of being light and quick-drying or unidirectional moisture conduction, it is only effective in the case of a small amount of sweat. For a large amount of sweat, the fabric is too thin and will still be wetted and quickly saturated. Therefore, the fabric needs a certain thickness to play a role in supporting the skin and the external environment. At the same time, the hydrophilic area and the hydrophobic area distributed 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. In order to improve the effectiveness of high-intensity sweat flowing in the fabric in different regions, it is necessary to ensure that the hydrophobic area is sufficiently hydrophobic, because the fabric substrate itself is a porous medium, and it will rely on the capillary wicking force of the fiber yarn, combined with the action of external force, to absorb the liquid into the fabric, and the fabric will be wetted over a long time. When the fabric is very hydrophobic, the wicking force between the fiber yarns is less than its own hydrophobic force, and the sweat will be sucked away by the stronger force of the hydrophilic area, which can keep the dryness of the hydrophobic area for a long 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, and the outer layer is super-hydrophilic; the inner layer and the outer layer of the water-repellent region are both super-hydrophobic. The specially designed fabric structure can ensure that the water-repellent region in the fabric has strong hydrophobicity, and the water-conducting channel has strong hydrophilicity, effectively guiding the moisture absorption and flow of sweat in the water-conducting channel, while avoiding wetting the water-repellent region.

[0034] After the fabric surface is etched by plasma, the present invention introduces specific functional groups on the surface of the fiber, thereby changing the surface free energy of the fiber. For example, after treatment with oxygen and argon or oxygen and nitrogen, on the one hand, active groups such as carboxyl, amino, and carbonyl are introduced to improve the wettability of the fiber surface; on the other hand, since the singlet oxygen atom has a higher energy, the electrons, ions, etc. in the plasma etch the fiber surface with a higher kinetic energy under its action, so that the roughness of the fiber surface increases, and obvious protrusions appear, thereby increasing the specific surface area of ​​the fiber and improving the absorption of water. At the same time, due to the significant improvement of its surface wettability and roughness, when using a coating additive, it is conducive to the spreading of the slurry on the fiber surface, so that the contact degree between the material and the additive is increased, and the introduction of polar functional groups can also directly participate in the cross-linking of the slurry to form a covalent bond, further greatly 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 harmful 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 method for preparing a durable water-conducting fabric of the present invention constructs a hydrophilic area and a hydrophobic area in the same plane of the fabric through hydrophilic-hydrophobic surface modification, which 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 absorption and saturation; and through different degrees of coating finishing, it can also ensure the wettability gradient in the thickness direction of the fabric, and at the same time ensure that the fabric has the ability to regulate the liquid flow behavior 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 a 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 the liquid when the outer layer of the fabric prepared in Example 1 is filled with water.

[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 was sprayed with water from the inner layer to the outer layer, and the flow behavior of the outer layer liquid was observed.

[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] Fig. 9 It is a force analysis diagram of the flow of liquid in the hydrophilic area and the hydrophobic area; among them, 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] Fig.10 This is the SEM image of the base fabric of Example 4 before plasma treatment.

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

[0049] Fig.12 It 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] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it 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 within the scope limited by the appended claims of the application equally.

[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 Testing and evaluation of the waterproof performance of textiles using the water dipping method.

[0054] Real-person fitting test: The durable water-conducting fabric is sewn onto the inner layer of a sports T-shirt purchased on the market, and the subjects wear the experimental clothing to complete the running experiment. The subjects run on a treadmill, and by adjusting the running speed and running time, a sweating scene with a sweating rate of 2000~4000g / h is created. After running, the wetting state of the durable water-conducting fabric sample is observed. The water-conducting fabric sample is removed from the wearer, left for 2 minutes, and then photographed with an infrared thermal imager for infrared thermal imaging observation to reflect the wetting state of the water-conducting fabric sample.

[0055] Washing method: similar to the washing method in daily life, place the sample to be washed and the accompanying laundry in the drum of the washing machine, set the washing mode to "quick wash mode", wash once for 15 minutes, and then dry the sample at 60°C. Then, the fabric surface contact angle test is used to measure the changes in the hydrophilicity and hydrophobicity of the sample after washing 1, 3, and 5 times.

[0056] Water contact angle: measured by contact angle tester. The specific test method is: turn on the contact angle tester and connect the software in the computer, place the sample to be tested on the sample table of the contact angle tester, with the test surface facing up, and the tester will automatically drip liquid after the test is turned on. The drip volume for each test is 5μL. When the liquid drips on the fabric surface, the same pattern will appear in the software interface, and the contact angle analysis is performed according to the software operation method.

[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 As shown, 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 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 50%, O2 added 50%; 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. A hard scraper with a scraping stroke of 12 knives is used to perform screen printing on the outer layer of the etched base fabric. 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 waterproofing agent, a thickener, a cross-linking agent and deionized water. The mass proportion of each component is: 30% for the waterproofing agent, 2% for the thickener, 7.5% for the cross-linking agent, and 60.5% for the deionized water.

[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 the 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, and the mass proportion of each component is: 20% of the hydrophilic agent, 1% of the thickener, 3% of the cross-linking agent, and 76% of the deionized water;

[0070] (4) The treated base fabric is 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; Fig.12 As shown, the durable water-conducting fabric is a double-layer fabric, including a water-conducting channel 3 and a water-repellent area 4, and the area of ​​the water-conducting channel 3 accounts for 55%; 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 super hydrophilic, with a water contact angle of 0°; the inner and outer layers of the water-repellent area 4 are both super hydrophobic, with water contact angles of 147° and 144°, respectively; the water-repellent level of the durable water-conducting fabric is level 4; after real-person wear, in the case of heavy sweating (sweating scenario with a sweating rate of 2000g / h), the durable water-conducting fabric gained 12% after 15 minutes; after being washed 5 times, the water-conducting channel still showed a high degree of hydrophilicity, and the contact angle remained at 0~5°, the inner layer water contact angle of the water-repellent area decreased from 147° to 135°, a decrease of 8%, and the outer layer water contact angle decreased from 144° to 132°, a decrease of 8.3%.

[0072] Figure 2 This is the SEM image of the surface of the base fabric before plasma treatment. The surface is relatively flat except for a few dirty bumps on the fabric. 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 to the surrounding hydrophobic areas; at the same time, this preparation method will not affect the ability of the liquid to be conducted from the inner layer to the outer layer of the fabric.

[0074] Figure 6 It is the flow behavior of 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 penetrate into the outer layer quickly 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 Shows the same flow behavior.

[0076] Figure 8The wetting conditions of the two surfaces are as follows: 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 hydrophobic area is slightly wetted at the spraying point, 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 hydrophobic area of ​​the inner layer is wetted at the spraying point.

[0077] Fig. 9 This is a force analysis diagram of liquid in the hydrophilic area and the hydrophobic area. When the liquid is in the hydrophilic area of ​​the inner layer of the fabric, it is acted upon by the capillary force of the hydrophilic yarn and, combined with the force of gravity, guides the liquid to the outer layer and flows along the water guide channel. When the liquid is in the hydrophobic area, the surface force of the hydrophobic area blocks the penetration and diffusion of the liquid.

[0078] Example 2

[0079] A method for preparing a durable water-conducting fabric, the specific steps are as follows:

[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 0.55 mm and the weight is 141 g / 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 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 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. A hard scraper with a scraping stroke of 12 knives is used to perform screen printing on the outer layer of the etched base fabric. 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 waterproofing agent, a thickener, a cross-linking agent and deionized water. The mass proportion of each component is: 20% for the waterproofing agent, 2.5% for the thickener, 7.5% for the cross-linking agent, and 70% for the deionized water.

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

[0085] The unprinted area forms a hydrophilic pattern as a water-conducting channel, and a hydrophilic coating is applied on the water-conducting 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, and the mass proportion of each component is: 10% of the hydrophilic agent, 1% of the thickener, 2% of the cross-linking agent, and 87% of the deionized water;

[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 durable water-conducting fabric finally produced is 0.06mm 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 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-repellent grade of 5 ; After real-person wear tests, under the condition of heavy sweating (sweating rate of 3500g / h), after 15 minutes, the durable water-conducting fabric gained 12.5% ​​in weight; after 5 washes, the water-conducting channel still showed high 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, the specific steps are as follows:

[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 20%, O2 added 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. A hard scraper with a scraping stroke of 12 knives is used to perform screen printing on the outer layer of the etched base fabric. 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 waterproofing agent, a thickener, a cross-linking agent and deionized water. The mass proportion of each component is: 20% for the waterproofing agent, 1.5% for the thickener, 5% for the cross-linking agent, and 73.5% for the deionized water.

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

[0095] The unprinted area forms a hydrophilic pattern as a water-conducting channel, and a hydrophilic coating is applied on the water-conducting 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, and the mass proportion of each component is: 10% of the hydrophilic agent, 1.5% of the thickener, 2% of the cross-linking agent, and 86.5% of the deionized water;

[0096] (4) The treated base fabric is 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 durable water-conducting fabric finally obtained 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, and the area of ​​the water-conducting channel accounts for 45%; the inner layer of the water-conducting channel is hydrophobic, with a water contact angle of 110°, and the outer layer is super-hydrophilic, with a water contact angle of 3°; the inner and outer layers of the water-repellent area are both super-hydrophobic, with water contact angles of 143° and 141.7° respectively; the water-repellent level of the durable water-conducting fabric is 4 After real-life wear tests, under conditions of heavy sweating (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 showed 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, the specific steps are as follows:

[0100] (1) Plasma treatment;

[0101] like Fig.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 subjected to the same local masking, and the outer layer of the base fabric is subjected to plasma treatment, and the unmasked part forms a water-conducting channel. The SEM image after plasma treatment is shown in Fig.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 with 10% and O2 with 90%; the treatment time is 120s; the etching depth of the water-conducting channel of the outer layer of the fabric by plasma 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, and the mass proportion of each component is: 20% of the hydrophilic agent, 2% of the cross-linking agent, and 78% of the deionized water;

[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 durable water-conducting fabric finally obtained 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, and the area of ​​the water-conducting channel accounts for 58%; the inner layer of the water-conducting channel is hydrophobic, with a water contact angle of 96°, and the outer layer is super-hydrophilic, with a water contact angle of 0.5°; the inner and outer layers of the water-repellent area are both super-hydrophobic, 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 (sweating rate of 4000g / h), the durable water-conducting fabric gained 14.3% weight after 15 minutes. After being washed five times, the water-conducting channel still showed 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, the specific steps are as follows:

[0109] (1) Plasma treatment;

[0110] The base fabric is a hydrophobic fabric with both inner and outer layers. The thickness of the base fabric is 0.7 mm and the weight is 145 g / m 2The outer layer is waterproof polyester, the inner layer is waterproof polyester, and 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 subjected to the same local masking, and the outer layer of the base fabric is subjected to plasma treatment, and the unmasked part forms a water-conducting channel; the process parameters of the plasma treatment are: the power is set to 150W; the gas is Ar added by 30%, and O2 added by 70%; the treatment time is 100s; the plasma etching depth of the water-conducting channel of 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, and the mass proportion of each component is: 20% of the hydrophilic agent, 3% of the cross-linking agent, and 77% of the deionized water;

[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 durable water-conducting fabric finally obtained is 0.067mm 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, and the area of ​​the water-conducting channel accounts for 45%; the inner layer of the water-conducting channel is hydrophobic, with a water contact angle of 121°, and the outer layer is super-hydrophilic, with a contact angle of 2°; the inner and outer layers of the water-repellent area are both super-hydrophobic, with water contact angles of 145° and 142° respectively; the water-repellent level of the durable water-conducting fabric is 5 After real-life wear, under the condition of heavy sweating (sweating rate of 3500g / h), after 15 minutes, the durable water-conducting fabric gained 10.9% weight; after 5 washes, the hydrophilic water-conducting area still showed high hydrophilicity, and the contact angle remained at 0~5°, while 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, the specific steps are as follows:

[0118] (1) Plasma treatment;

[0119] The base fabric is a hydrophobic fabric with both inner and outer layers. The thickness of the base fabric is 0.59 mm and the weight is 155 g / m 2The outer layer is waterproof nylon, the inner layer is waterproof polyester, and 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 in the same way, and the base fabric is treated with plasma, and the unmasked part forms a water-conducting channel; the process parameters of the plasma treatment are: the power is set to 180W; the gas is Ar added 20%, O2 added 80%; the treatment time is 80s; 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, and the mass proportion of each component is: hydrophilic agent 15%, cross-linking agent 3%, 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 durable water-conducting fabric finally obtained 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, and the area of ​​the water-conducting channel accounts 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 water repellency level of the durable water-conducting fabric is 5 After real-life wear tests, under conditions of heavy sweating (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 showed high hydrophilicity, with the contact angle maintained at 0~5°. The inner water contact angle in the water-repellent area decreased from 146.2° to 139°, a decrease of 4.9%, and the outer water contact angle 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 layer and the outer layer of the water-repellent area are both super hydrophobic; Weakly hydrophilic means that the water contact angle is 60°~90°, hydrophobic means that the water contact angle is 90°~140°, super hydrophilic means that the water contact angle is 0°~5°, and super hydrophobic means that the water contact angle is greater than 140°; The area of ​​the water channel accounts for 40~60%.

2. The method for preparing a durable water-conducting fabric according to claim 1, characterized in that: A fabric with inner and outer layers having different hydrophilic and hydrophobic properties is used as a base fabric, an inner mask of the base fabric is placed in a plasma box, an outer layer of the base fabric is exposed to plasma, the outer layer of the base fabric is etched, a hydrophobic slurry is used as a printing slurry, and the outer layer of the etched base fabric is screen printed, the area covered by the printing slurry forms a water-repellent area, the printing slurry penetrates from the outer layer to the inner layer, and a hydrophilic pattern is formed in the unprinted area as a water-conducting channel, and then a hydrophilic coating is applied to the water-conducting channel by screen printing or spraying, and finally the treated base fabric is dried and baked in sequence to obtain a durable water-conducting fabric; The water contact angle of the inner layer of the base fabric is greater than 95°, and the water contact angle of the outer layer is 40°~90°; The plasma etching depth of the outer layer of the base fabric is 40~90%.

3. The method for preparing a durable water-conducting fabric according to claim 2, characterized in that: The thickness of the base fabric is 0.5~0.8mm, and the thickness of the durable water-conducting fabric is 0.05~0.08mm thicker than the base fabric; 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.

4. The method for preparing a durable water-conducting fabric according to claim 2, characterized in that: The process parameters of plasma treatment are: power setting is 50~200W; gas is Ar added 10~50%, O2 added 50~90%; treatment time is 60~120s.

5. The method for preparing a durable water-conducting fabric according to claim 2, characterized in that: The hydrophobic slurry is composed of a waterproofing agent, a thickener, a cross-linking agent and deionized water, and the weight proportion of each component is: waterproofing agent 20-30%, thickener 1.5-2.5%, cross-linking agent 5-7.5%, deionized water 60-73.5%; 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, and 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%; When the hydrophilic coating is sprayed, the solution is composed of a hydrophilic agent, a cross-linking agent and deionized water, and the mass proportion of each component is: hydrophilic agent 10~30%, cross-linking agent 2~3%, deionized water 67~88%.

6. The method for preparing a durable water-conducting fabric according to claim 2, characterized in that: The drying temperature is 65~90℃, and the time is 20~60min; the baking temperature is 160~180℃, and the time is 30~90s.

7. The method for preparing a durable water-conducting fabric according to claim 1, characterized in that: A fabric with both inner and outer layers being hydrophobic is used as a base fabric, and the outer and inner layers of the base fabric are subjected to the same partial masking. First, the outer layer of the base fabric is subjected to plasma treatment, and the unmasked part forms a water-conducting channel. Then, a hydrophilic coating is applied to the water-conducting channel of the outer layer of the fabric by spraying. Finally, the treated base fabric is dried and baked in sequence to obtain 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 depth of plasma etching on the water-conducting channels of the outer layer of the base fabric is 40-90%.

8. The method for preparing a durable water-conducting fabric according to claim 7, characterized in that: The thickness of the base fabric is 0.5~0.8mm, and the thickness of the durable water-conducting fabric is 0.05~0.08mm thicker than 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.

9. The method for preparing a durable water-conducting fabric according to claim 7, characterized in that: The process parameters of plasma treatment are: power setting is 100~200W; gas is Ar added by 10~30%, O2 added by 70~90%; treatment time is 80~150s.

10. The method for preparing a durable water-conducting fabric according to claim 7, characterized in that: The hydrophilic solution used in the hydrophilic coating is composed of a hydrophilic agent, a cross-linking agent and deionized water, and the mass proportion of each component is: hydrophilic agent 10~30%, cross-linking agent 2~3%, and deionized water 67~88%.

11. The method for preparing a durable water-conducting fabric according to claim 7, characterized in that: The drying temperature is 65~90℃, and the time is 20~60min; the baking temperature is 160~180℃, and the time is 30~90s.

Images