Braided fabric film covering method and system, braided fabric and vamp

Abstract

According to the braided fabric film covering method and system, the braided fabric and the vamp, an adhesive solution matched with the surface wettability of the braided fabric to be covered with the film is selected, at least part of the adhesive solution permeates into the braided fabric to be covered with the film through the capillary effect, and after an adhesive is cured, the surface of the braided fabric to be covered with the film is covered with the adhesive solution; the film covering structure further penetrates into the to-be-film-covered braided fabric, the bonding strength of the film covering structure and the to-be-film-covered braided fabric is remarkably improved, the problem of film layer stripping caused by a traditional hot pressing process is solved, the target area can be accurately covered by directly coating the solution, leftover material waste generated by laser film material cutting is avoided, the production cost is reduced, and the production efficiency is improved. The method is especially suitable for local film covering in complex shapes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of woven fabric film coating, in particular to a woven fabric film coating method and system, a woven fabric and a shoe upper. BACKGROUND

[0002] In the production and processing process of textile fabrics, local reinforcement is one of the important processes to improve the durability, functionality or aesthetics of the fabric. At present, the widely used film coating reinforcement process in the industry mainly relies on hot melt film materials, and its typical process includes: first, cutting the film material into the required shape by laser cutting, then bonding the cut film on the surface of the fabric, and finally bonding and fixing the hot melt film and the fabric by heating and pressing or high frequency and high cycle process.

[0003] However, the traditional process has the following significant deficiencies: 1. Complex process flow: it needs to go through cutting, positioning, bonding, heating and pressing and other processes, the production efficiency is low, and the operation precision is high; 2. Serious material waste: the laser cutting process will produce corner materials, especially when cutting complex-shaped film pieces, the material utilization rate is low, increasing the production cost; 3. Single color: the existing hot melt film is usually single color or transparent material, which cannot meet the diversified and personalized color or pattern requirements, limiting its application in fashion or decorative textiles; 4. High temperature processing risk: the whole needs to be heated to a high temperature (usually more than 200℃) during the compounding process, which can easily cause thermal damage, deformation or performance degradation of the base fabric (such as chemical fiber, elastic fiber, etc.), affecting the quality of the finished product.

[0004] Therefore, it is an urgent problem to be solved in the textile industry to develop an efficient, environmentally friendly, low-damage and multi-color effect local film coating reinforcement technology. SUMMARY

[0005] In order to solve one or more of the above technical problems in the prior art, the embodiments of the present application provide a woven fabric film coating method and system, a woven fabric with film coating structure and a shoe upper, to solve the problems of complex process flow, serious material waste, single color and high temperature processing risk in the prior art film coating method.

[0006] In order to achieve the above purpose, the technical solutions adopted by the present application to solve the technical problems are: In a first aspect, the present application provides a woven fabric film coating method, which comprises: An adhesive solution matching the wettability of the surface of the woven fabric to be coated is applied to a target area on the surface of the woven fabric to be coated. The adhesive solution penetrates at least partially into the interior of the woven fabric to be coated by means of capillary effect. The adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0007] This application solution selects an adhesive solution with wettability matching the surface of the woven fabric to be coated, and utilizes capillary effect to allow the adhesive solution to penetrate at least partially into the interior of the woven fabric. After the adhesive cures, it not only covers the surface of the woven fabric but also penetrates into its interior, significantly improving the bonding strength between the coated structure and the woven fabric. This avoids the film peeling problem caused by traditional hot pressing processes, and the direct application of the solution can accurately cover the target area, avoiding waste of scrap material generated by laser cutting of the film material, reducing production costs, and is especially suitable for localized coating of complex shapes.

[0008] In one specific embodiment, the method further includes a process of determining an adhesive solution that matches the wettability of the surface of the woven fabric to be coated, comprising: Determine the substrate of the woven fabric to be coated; And when the substrate is a hydrophilic fiber, the adhesive solution is determined to be an aqueous adhesive solution; or, When the substrate is a hydrophobic fiber, the adhesive solution is determined to be an organic adhesive solution.

[0009] The proposed solution achieves precise wetting and efficient penetration by intelligently matching the type of adhesive solution to the substrate characteristics of the woven fabric to be coated, thereby maximizing the compatibility between the adhesive solution and the substrate of the woven fabric to be coated.

[0010] In one specific embodiment, the method further includes: The woven fabric to be coated is dried after being coated with the adhesive solution to allow the solvent in the adhesive solution to evaporate, and the adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0011] The proposed solution achieves efficient molding and performance improvement of the coated structure through drying treatment.

[0012] In one specific embodiment, the drying temperature of the drying process is 100-160℃, and the drying time is 10-30 min; This application proposes a solution coating and low-temperature drying (drying temperature 100-160℃) to replace the traditional high-temperature and high-pressure composite process, thereby avoiding thermal damage to the fibers caused by high temperatures (>200℃) and maintaining the original mechanical properties and hand feel of the woven fabric.

[0013] In one specific embodiment, the adhesive includes one of polyurethane, polyacrylic acid ester, polyurethane or polyacrylic acid ester modified adhesive, and multi-component polymer compounding adhesive.

[0014] This application solution achieves multiple performance optimizations in the coating process by selecting relevant types of adhesive systems, demonstrating significant advantages in terms of adhesive strength, process adaptability, and functional scalability, and providing an ideal material solution for functional coating of textiles.

[0015] In one specific embodiment, the modified polyurethane or polyacrylate adhesive is modified by block, graft, or core-shell emulsion polymerization methods.

[0016] In one specific embodiment, applying an adhesive solution with wettability matching the surface of the woven fabric to be coated to a target area of ​​the woven fabric includes: An adhesive solution matching the wettability of the woven fabric to be coated is applied to the target area of ​​the woven fabric surface by digital printing or screen printing.

[0017] This application solution, through digital and selective processing characteristics, improves coating precision and functionality while achieving the "zero waste" intelligent manufacturing goal that the textile industry has always pursued.

[0018] In one specific embodiment, when an adhesive solution matching the wettability of the woven fabric to be coated is applied to a target area of ​​the woven fabric surface by digital printing, the adhesive content in the adhesive solution is 15%-40%. When an adhesive solution matching the wettability of the woven fabric to be coated is applied to a target area of ​​the woven fabric surface by screen printing, the adhesive content in the adhesive solution is ≥50%.

[0019] The proposed solution adjusts the concentration ratio of the adhesive in the adhesive solution to perfectly adapt to different processing requirements.

[0020] In one specific embodiment, the surface of the woven fabric to be coated has gaps.

[0021] In one specific embodiment, the adhesive solution further includes a dispersant and / or a colorant.

[0022] The present application proposes a method that, by introducing a dispersant into the adhesive solution, can stabilize the dispersion system of the adhesive solution, improve processing performance, and enhance interfacial bonding; and by introducing a colorant into the adhesive solution, can the resulting coated structure exhibit different color effects.

[0023] Secondly, this application also provides a woven fabric coating system, the system comprising at least: A coating mechanism is configured to apply an adhesive solution that matches the wettability of the surface of the woven fabric to be coated to a target area of ​​the surface of the woven fabric to be coated. The adhesive solution penetrates at least partially into the interior of the woven fabric to be coated by means of capillary effect. The adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0024] In one specific embodiment, the system further includes: The processing module is configured to determine the substrate of the woven fabric to be coated; and when the substrate is a hydrophilic fiber, determine that the adhesive solution is an aqueous adhesive solution; or when the substrate is a hydrophobic fiber, determine that the adhesive solution is an organic adhesive solution.

[0025] In one specific embodiment, the system further includes: The drying mechanism is configured to dry the woven fabric to be coated after being coated with the adhesive solution, so that the solvent of the adhesive solution evaporates, and the adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0026] Thirdly, this application also provides a woven fabric including a substrate and a coating structure disposed on the substrate, the coating structure being formed on the substrate using the method described in any one of the first aspects, or the coating structure being formed on the substrate using a coating system described in any one of the second aspects.

[0027] Fourthly, this application also provides a woven fabric, including a substrate and a coating structure disposed on the substrate, the coating structure being formed by an adhesive in an adhesive solution being fixed to the surface and interior of the target area.

[0028] Fifthly, this application also provides a shoe upper, the shoe upper comprising a shoe upper substrate and a coating structure formed on a target area of ​​the shoe upper substrate using the method described in any one of the first aspects; Alternatively, the upper may include an upper substrate and a coating structure formed on a target area of ​​the upper substrate using a coating system as described in any of the second aspects; Alternatively, the upper may be made of a woven fabric as described in the third or fourth aspect; Alternatively, the shoe upper may include a shoe upper substrate and a coating structure disposed in a target area of ​​the shoe upper substrate, the coating structure being formed by an adhesive in an adhesive solution being fixed to the surface and interior of the target area. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a flowchart of a method for coating woven fabrics according to some embodiments of this application; Figure 2 This is a flowchart of the process for determining an adhesive solution that matches the wettability of the surface of the woven fabric to be coated, as provided in some embodiments of this application; Figure 3 This is a structural block diagram of a woven fabric coating system provided in some embodiments of this application; Figure 4 These are schematic diagrams of woven fabrics provided in some embodiments of this application; Figure 5 These are schematic diagrams of woven fabrics provided in other embodiments of this application; Figure 6 This is a schematic diagram of a woven fabric provided in some embodiments of this application. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] As described in the background section, existing lamination methods suffer from problems such as complex processes, significant material waste, limited color options, and risks associated with high-temperature processing. To address one or more of these issues, this application proposes a novel method for laminating woven fabrics. By selecting an adhesive solution with wettability matching the surface of the woven fabric to be laminated, and utilizing capillary effect to allow the adhesive solution to at least partially penetrate the interior of the fabric, the adhesive not only covers the surface of the fabric after curing but also penetrates deep into its interior. This significantly improves the bonding strength between the laminated structure and the fabric, avoids the film peeling problem caused by traditional hot-pressing processes, and allows for precise coverage of the target area by directly applying the solution. This avoids waste of scrap material generated by laser cutting of the film material, reduces production costs, and is particularly suitable for localized lamination of complex shapes.

[0033] The solution of this application will now be described in detail with reference to the accompanying drawings and various embodiments.

[0034] Example 1 To achieve the solution of this application, an embodiment of this application provides a method for coating woven fabrics, referring to... Figure 1 As shown, the method includes the following steps: S110: An adhesive solution matching the wettability of the surface of the woven fabric to be coated is applied to a target area on the surface of the woven fabric to be coated. The adhesive solution penetrates at least partially into the interior of the woven fabric to be coated by means of capillary effect. The adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0035] This application employs an adhesive solution system with wettability matching the surface of the woven fabric to be coated. Through precise coating and capillary penetration, a high-performance coating structure is constructed on and within the woven fabric. In practice, a suitable adhesive solution can be matched to the woven fabric to be coated to ensure good wettability and capillary penetration. It is understood that the wetting effect of a solution on a material refers to the ability of a liquid (solution) to spontaneously spread and penetrate the surface of a solid material (i.e., the woven fabric to be coated). Its core principle involves the interaction of surface tension, wettability, and capillary action.

[0036] In some specific embodiments, a targeted adhesive solution system can be precisely formulated by analyzing the surface wettability and microstructure characteristics of the woven fabric to be coated. The adhesive solution contains at least two functional components: an adhesive and a solvent. After the adhesive solution is applied to the target area of ​​the woven fabric, a portion of the adhesive solution remains on the surface, while another portion penetrates into the interior of the woven fabric using capillary action. After the adhesive cures, it adheres to both the surface and interior of the woven fabric, forming a coating structure and thus producing a coating effect. On the one hand, this increases the friction of the woven fabric surface; on the other hand, due to the partial penetration of the adhesive solution, the adhesion between the coating structure and the woven fabric is better, and it may even improve the tensile / tear strength of the object.

[0037] In some specific embodiments, after the adhesive cures, it undergoes a cross-linking reaction and adheres to the surface and interior of the woven fabric to be coated, forming a coating structure, thereby achieving a coating effect.

[0038] In some specific embodiments, a wettability matching mechanism can be used to match the adhesive solution with the wettability of the woven fabric to be coated. For example, the surface energy matching degree can be calculated based on the Owens-Wendt theory to ensure that the contact angle θ of the adhesive solution on the substrate of the woven fabric to be coated is less than a preset angle (e.g., θ < 60°).

[0039] In other specific embodiments, directional capillary permeation can also be used to ensure that the adhesive solution partially penetrates into the fabric to be coated. For example, the penetration depth can be controlled according to the Washburn equation, specifically calculated as follows: L²=γ·r·cosθ·t / (2η)(1) Where: L is the target penetration depth, r is the equivalent capillary radius between fibers of the woven fabric to be coated (which can be determined by microcomputed tomography (μCT)), θ is the contact angle of the adhesive solution on the substrate of the woven fabric to be coated, and η is the viscosity of the adhesive solution.

[0040] In some specific embodiments, the contact area between the woven fabric to be coated and the adhesive solution can be increased by plasma treatment of the surface, or by using a tightly woven structure for the woven fabric, or by using yarns with a single filament count (F number) exceeding a preset threshold, thereby enhancing the penetration effect. Preferably, the preset threshold is 40F. Here, F number (single filament count) refers to the number of individual fibers contained in a single yarn.

[0041] Plasma treatment of the surface of the woven fabric to be coated can significantly improve its interfacial bonding performance with the adhesive solution through physicochemical modification. In practice, high-energy particles (electrons, ions, free radicals) in the plasma bombard the fiber surface to achieve chemical bond breaking (such as CH bond dissociation), introduction of polar groups (such as oxygen-containing functional groups such as -COOH, -OH, etc., reducing the contact angle by 30-50°), and surface energy enhancement. This causes the surface to form a nanoscale rough structure due to etching, thereby increasing its specific surface area and enhancing the mechanical interlocking effect.

[0042] Reference Figure 2 As shown, in some specific embodiments, the method further includes a process of determining an adhesive solution that matches the wettability of the surface of the woven fabric to be coated, including: S210: Determine the substrate of the woven fabric to be coated; S220: And when the substrate is a hydrophilic fiber, determine that the adhesive solution is an aqueous adhesive solution; or, When the substrate is a hydrophobic fiber, the adhesive solution is determined to be an organic adhesive solution.

[0043] For hydrophilic fibers, such as cotton or viscose fibers, whose surfaces are easily wetted by water and typically contain polar groups (such as -OH, -COOH), aqueous adhesive solutions are preferred because they more easily wet the fiber surface and penetrate into the fiber gaps through capillary action. It is understood that the solvent in aqueous adhesive solutions is water, such as deionized water, distilled water, or water containing co-solvents.

[0044] Furthermore, capillary penetration depends not only on the hydrophobicity or hydrophilicity of the substrate but also on factors such as fiber spacing. For example, for high-filament fibers, such as high-filament polyester (e.g., 40F and above), the finer filaments, denser fiber spacing, and smaller gaps between fibers after weaving enhance the capillary penetration effect of the solution. Therefore, for high-filament fibers, aqueous adhesive solutions are also preferred.

[0045] For hydrophobic fibers, such as spandex, because the material surface is not easily wetted by water, they are usually composed of non-polar groups (such as... Since it is composed of benzene rings, organic solvent-based adhesive solutions are preferred to improve wettability and penetration. It is understood that the solvent in the organic adhesive solution is an organic solvent, such as alcohol solvents (including but not limited to methanol, ethanol, isopropanol, etc.), ketone solvents (including but not limited to acetone, cyclohexanone, etc.), ester solvents (including but not limited to ethyl acetate, butyl acetate, etc.), etc., which will not be listed here.

[0046] In some specific embodiments, the adhesive can also be a two-component adhesive. A two-component adhesive refers to an adhesive containing two components: one liquid contains an adhesive (such as polyurethane, polyacrylate, a modified polyurethane or polyacrylate adhesive, or a multi-component polymer compound adhesive), and the other liquid contains a catalyst and / or hardener, such as metal salts or organic acids. The two solutions can cure rapidly after mixing without the need for drying. In the embodiments of this application, the two-component adhesive solution includes, but is not limited to, epoxy resin, polyurethane, and other AB adhesives, which can achieve high-strength bonding through chemical cross-linking. After the two solutions of the two-component adhesive solution are applied separately to the surface of the woven fabric to be coated and mixed, it can dry and solidify quickly, thus eliminating the need for drying, further simplifying the process and avoiding heat damage to the woven fabric at high temperatures.

[0047] It should be noted that in practical applications, the compatibility of the adhesive solution depends not only on the hydrophobicity of the fibers, but more importantly on whether the solution can effectively wet the substrate. As long as the adhesive solution can wet the fiber surface and penetrate its microstructure, a strong coating can be formed by drying and curing. Therefore, the scope of protection of this application covers water-based, organic solvent-based, and two-component adhesive systems, and the specific selection can be flexibly adjusted based on processing requirements, environmental protection requirements, and substrate characteristics.

[0048] In some specific embodiments, when the adhesive solution is an aqueous adhesive solution or an organic adhesive solution, the method further includes: The woven fabric to be coated is dried after being coated with the adhesive solution to allow the solvent in the adhesive solution to evaporate, and the adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0049] Wherein, when the adhesive solution is an aqueous adhesive solution, the drying temperature of the drying process is 100-160℃ and the drying time is 10-30min; when the adhesive solution is an organic adhesive solution, the drying temperature of the drying process is 100-160℃ and the drying time is 10-30min.

[0050] Understandably, drying the woven fabric after applying the adhesive solution can achieve efficient forming and performance improvement of the coated structure. Furthermore, since the drying temperature is only 100-160℃, which is lower than the temperature required for traditional high-temperature, high-pressure lamination processes (>200℃), it avoids thermal damage to the fibers and maintains the original mechanical properties and feel of the woven fabric.

[0051] In some specific embodiments, segmented temperature-controlled drying (e.g., gradient heating from 80℃ to 120℃ to 160℃) can be used to allow the adhesive to gradually cure from the surface of the substrate inwards, forming a gradient cross-linked network, thereby improving the interfacial bonding strength between the two. Furthermore, during the drying process, the capillary action induced by solvent evaporation allows the adhesive to penetrate deep into the fiber gaps of the substrate, achieving complete coating at the single-filament level, realizing a three-dimensional coating effect, and enhancing the adhesion between the adhesive and the interior of the substrate.

[0052] In some specific embodiments, the adhesive includes one of polyurethane, polyacrylate, polyurethane or polyacrylate modified adhesive, and multi-component polymer compound adhesive.

[0053] It should be noted that polyurethane, polyacrylate, and their modified adhesives have broad material compatibility: polyurethane offers excellent flexibility and abrasion resistance, making it particularly suitable for textiles that require repeated bending; polyacrylate provides higher bonding strength and weather resistance, making it suitable for outdoor applications. By selecting different adhesives or compounding them, the mechanical performance requirements of various woven fabric substrates can be precisely matched. Furthermore, multi-component polymer compound systems, through synergistic effects, can both form chemical bonds with the fiber surface (such as the reaction of polyurethane's -NHCO- with the hydroxyl groups of cotton fibers) and physically anchor themselves in the fiber gaps. This multi-mechanism combination ensures that the coating layer maintains durable adhesion even under washing, friction, and other usage conditions.

[0054] In some specific embodiments, the modified polyurethane or polyacrylate adhesive is modified by block, graft, or core-shell emulsion polymerization methods.

[0055] Modified adhesives (such as polyurethane-polyacrylate core-shell structures) allow for the control of viscosity and curing properties through molecular design. For example, low-viscosity modified adhesives can be used to ensure deep penetration for high-fiber fibers, while high-solids-content compound systems can be selected for thick fabrics to ensure coating thickness. This adjustability significantly improves the tolerance of the process window. Furthermore, functional additives such as antibacterial agents and UV stabilizers can be easily introduced based on this adhesive system. In particular, the active groups in the molecular structure of polyurethane / polyacrylate modified adhesives provide convenient grafting sites for functional modification, achieving multifunctional integrated coatings with antibacterial and waterproof properties.

[0056] In some specific embodiments, the adhesive is preferably waterborne polyurethane or waterborne polyacrylate. By selecting waterborne polyurethane or polyacrylate emulsions, environmental protection requirements are met while ensuring bonding performance. Furthermore, compared to traditional solvent-based adhesives, VOC emissions are significantly reduced, making it more suitable for processing close-fitting textiles.

[0057] In one specific embodiment, applying an adhesive solution with wettability matching the surface of the woven fabric to be coated to a target area of ​​the woven fabric includes: An adhesive solution matching the wettability of the woven fabric to be coated is applied to the target area of ​​the woven fabric surface by digital printing or screen printing.

[0058] Understandably, digital printing or screen printing allows for digital and selective coating processes, enabling precise coating on the surface of the fabric to be coated. For example, through digital control in digital printing or template-based operation in screen printing, complex patterns can be coated with micron-level precision on the surface of the fabric, perfectly matching the reinforcement needs of specific areas such as garment pieces and functional zones, overcoming the material waste and design limitations caused by traditional overall coating. Furthermore, utilizing the variable data characteristics of digital printing, solution concentration gradient control can be achieved in different areas of the same fabric surface (e.g., high adhesive content at joints for reinforcement, and low content in other areas to maintain softness), giving a single fabric multi-dimensional functional properties. Combining the squeegee pressure control of screen printing with the droplet control of digital printing allows for precise film thickness control, avoiding the uneven film thickness problems caused by traditional padding processes.

[0059] In some specific embodiments, the target area can be the entire surface of the woven fabric to be coated; In some other specific embodiments, the target area may be a portion of the surface of the woven fabric to be coated.

[0060] In practice, image recognition technology can be used to identify the surface of the woven fabric to be coated, so as to accurately locate the target area on the surface of the woven fabric to be coated. This breaks through the limitations of traditional manual positioning. Through the fully digital process of "imaging-recognition-positioning-verification", the positioning error of the coating of complex patterns can be reduced, while shortening the changeover time, providing key technical support for the intelligent manufacturing of personalized customized textiles.

[0061] In some specific embodiments, when an adhesive solution matching the wettability of the woven fabric to be coated is applied to a target area of ​​the woven fabric surface by digital printing, the adhesive content in the adhesive solution is 15-40%. When an adhesive solution matching the wettability of the woven fabric to be coated is applied to a target area of ​​the woven fabric surface by screen printing, the adhesive content in the adhesive solution is ≥50%.

[0062] This application achieves a perfect fit for different processing requirements by adjusting the concentration ratio of the adhesive in the adhesive solution. Based on the principle that the solute (adhesive) in the solution system does not affect the solvent's wetting properties, this application establishes a dynamic concentration adjustment mechanism: for screen printing processes requiring high throughput, the adhesive content is increased to over 50% to ensure sufficient solid content to meet mechanical strength requirements; while for digital printing processes sensitive to fluid properties, the adhesive content is optimized within the golden range of 15-40%. This concentration range ensures smooth nozzle ejection (this adhesive content controls the solution viscosity within a suitable range) and maintains the optimal surface tension of the ink.

[0063] It should be noted that the binder content in the binder solutions used in the above-mentioned digital printing and screen printing are merely illustrative and not restrictive. In digital printing, if the binder content is too high, the ink will become very viscous, which can easily lead to malfunctions; therefore, the binder content is set slightly lower. On the other hand, offset screen printing is less prone to clogging the mesh, so the binder content can be set higher.

[0064] By precisely controlling the adhesive concentration, the same formulation system can be adapted to both screen printing (high solids content) and digital printing (low viscosity), improving cross-platform process compatibility and reducing equipment modification costs for enterprises. Therefore, this intelligent concentration adaptation strategy fundamentally solves the technical bottleneck in traditional lamination processes where "one formulation cannot be compatible with multiple devices."

[0065] In some specific embodiments, the surface of the woven fabric to be coated has gaps.

[0066] The woven fabric to be coated as described in this application has a microscopic or macroscopic slit structure on its surface. The macroscopic slit structure is formed by the interweaving of the substrate, while the microscopic slit structure is formed by the pores between individual fibers. This porous characteristic plays a crucial role in the coating process. Generally speaking, woven fabrics with slit surfaces enhance capillary penetration. When an adhesive solution is applied to the surface of the woven fabric, due to capillary action, in addition to some of the adhesive solution remaining on the surface, a portion of the solution will penetrate into the interior of the woven fabric along the slits, preventing the coating structure from forming a surface adhesion on the surface of the woven fabric to be coated.

[0067] In some specific embodiments, the adhesive solution further includes a dispersant and / or a colorant.

[0068] On the one hand, introducing a dispersant into the adhesive solution can reduce the sedimentation rate of adhesive particles, improve room temperature storage stability, and prevent adhesive particle aggregation, thereby stabilizing the dispersion system of the adhesive solution. On the other hand, introducing a dispersant into the adhesive solution can adjust the rheological properties of the solution, reduce the surface tension of the solution, and eliminate foam, thereby improving processing performance. In addition, introducing a dispersant into the adhesive solution can also promote substrate wetting, form molecular bridging effects, and improve coating uniformity, thereby enhancing the interfacial bonding between the woven fabric to be coated and the adhesive. For example, based on the principle of surface chemical modification, the dispersant is preferably a polyether-modified polysiloxane compound, whose hydrophobic segments in its molecular structure are compatible with the adhesive, and whose hydrophilic segments are oriented to form steric hindrance, ensuring that the Zeta potential of the nanoscale adhesive particles is stable within the range of ±30mV.

[0069] By introducing colorants into the adhesive solution, the resulting coating structure can exhibit different color effects, such as solid colors, gradient colors, lines, and colored patterns, giving it precise color expression capabilities and functional expandability. For example, the colorant uses surface-coated organic / inorganic composite pigments (particle size D50 ≤ 200 nm), which are chemically bonded to the adhesive molecules through covalent grafting technology.

[0070] In some specific embodiments, the woven fabric to be coated is a textile or nonwoven fabric. Further, the textile fabric includes white textile fabric, colored textile fabric, or printed textile fabric.

[0071] It is understood that by using the woven fabric coating method provided in this application to form a coating structure on the surface of colored or printed textile fabrics, the color fastness of the product can be improved.

[0072] Example 2 Corresponding to Embodiment 1 above, this application also provides a woven fabric coating system. In this embodiment, content that is the same as or similar to that in Embodiment 1 above can be referred to the above description and will not be repeated hereafter. (See also...) Figure 3 As shown, the system includes at least: The coating mechanism 10 is configured to apply an adhesive solution that matches the wettability of the surface of the woven fabric to be coated to a target area of ​​the surface of the woven fabric to be coated. The adhesive solution penetrates at least partially into the interior of the woven fabric to be coated by means of capillary effect. The adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0073] In some specific embodiments, the coating mechanism 10 includes a liquid supply system, a coating execution unit, and a motion control system. The liquid supply system is configured to store the adhesive solvent. Optionally, the liquid supply system includes a precision metering pump driven by a servo motor to accurately control the flow rate of the adhesive solution. The liquid storage tank of the liquid supply system is configured as a thermostatic storage tank to ensure the viscosity of the adhesive solution remains stable. The coating execution unit is configured to precisely apply the adhesive solution to the target area on the surface of the woven fabric to be coated. The coating execution unit includes a multi-mode nozzle array and / or a flexible scraper module. The multi-mode nozzle array is the core spraying system of the coating execution unit, achieving high-precision fluid deposition across various scenarios by integrating multiple nozzle technologies. The multi-mode nozzle array includes electric nozzles (suitable for 15-40% low viscosity solutions) and / or pneumatic nozzles (suitable for 50%+ high solids content solutions). The flexible scraper module can be made of polyurethane. The motion control system is configured to achieve high-precision dynamic coordination between the coating execution unit and the woven fabric to be coated. The motion control system can use a six-axis robotic arm and / or a linear module to achieve positioning functionality.

[0074] In some specific embodiments, the system further includes: The processing module 20 is configured to determine the substrate of the woven fabric to be coated; and when the substrate is a hydrophilic fiber, determine that the adhesive solution is an aqueous adhesive solution; or when the substrate is a hydrophobic fiber, determine that the adhesive solution is an organic adhesive solution.

[0075] It is understood that the processing module 20 can be integrated into the coating mechanism 10 or can be independent of the coating mechanism 10. For example, the processing module 20 can be implemented by an external computer or other device.

[0076] In some specific embodiments, the system further includes: The drying unit 30 is configured to dry the woven fabric to be coated after being coated with the adhesive solution, so that the solvent of the adhesive solution evaporates and the adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

[0077] It is understood that the drying mechanism 30 is located downstream of the coating mechanism 10 so that after the coating mechanism 10 completes the application of the adhesive solution to the target area of ​​the woven fabric to be coated, the woven fabric to be coated on the coating mechanism 10 is conveyed to the drying mechanism 30 by a conveyor belt or other equipment so that the drying mechanism 30 can perform the corresponding drying treatment on the woven fabric to be coated.

[0078] It should be noted that the specific structure of the drying mechanism 30 is not limited in the embodiments of this application. Without departing from the inventive concept of this application, any known drying equipment for the coating process can be used as the drying mechanism 30 of this application. For example, in some specific embodiments, the drying mechanism 30 may include a hot air circulation system, a temperature control and monitoring system, a mechanical transmission system, and a waste gas treatment unit, etc.

[0079] In some specific embodiments, the system further includes: The image recognition module 40 is configured to use image recognition technology to identify the surface of the woven fabric to be coated, so as to accurately locate the target area on the surface of the woven fabric to be coated.

[0080] In a specific implementation, the image recognition module 40 can be integrated above the coating mechanism 10. The image recognition module 40 may include an image acquisition unit and a target detection unit. The image acquisition unit is configured to acquire images of the woven fabric to be coated located on the working platform of the coating mechanism 10. The image acquisition unit can employ a multispectral industrial camera in conjunction with a ring LED light source, supporting dual-mode imaging in visible light (400-700nm) and near-infrared (900-1700nm). The target detection unit includes a semantic segmentation model based on deep learning. The target detection unit can identify and locate the target area on the surface of the woven fabric to be coated based on the image acquired by the image acquisition unit.

[0081] Example 3 Corresponding to Embodiment 1 or 2 above, this application also provides a woven fabric, which includes a substrate and a coating structure disposed on the substrate. The coating structure is formed on the substrate using the method described in any one of Embodiment 1, or the coating structure is formed on the substrate using the coating system described in any one of Embodiment 2. In this embodiment, the content that is the same as or similar to Embodiment 1 or 2 above can be referred to the above description, and will not be repeated hereafter.

[0082] Figure 4An illustrated fabric is shown in which the coating structure is formed on a substrate by digital printing using the method described in Example 1. Figure 4 It can be seen that the coating structure of this woven fabric has the characteristics of continuous smoothness.

[0083] Figure 5 An illustrated fabric is shown in which the coating structure is formed on a substrate by digital printing using the method described in Example 1. Figure 5 It can be seen that the coating structure of this woven fabric has the characteristic of free color combination.

[0084] Figure 6 A woven fabric is shown, which forms the coating structure on a portion of the surface of a substrate by digital printing as described in Embodiment 1, wherein the upper half of the woven fabric is unprinted and the lower half is printed to form the coating structure.

[0085] Example 4 Corresponding to embodiments one to three above, this application also provides a woven fabric, which includes a substrate and a coating structure disposed on the substrate. The coating structure is formed by an adhesive in an adhesive solution fixing it to the surface and interior of the target area. In this embodiment, the formation process of the coating structure can refer to embodiments one or two above, and will not be repeated here.

[0086] Example 5 Corresponding to embodiments one to four above, this application also provides a shoe upper, the shoe upper comprising a shoe upper substrate and a coating structure formed on a target area of ​​the shoe upper substrate using the method described in any one of embodiments one; or the shoe upper comprising a shoe upper substrate and a coating structure formed on a target area of ​​the shoe upper substrate using a coating system described in any one of embodiments two; or the shoe upper comprising a shoe upper substrate and a woven fabric prepared as described in embodiments three or four; or the shoe upper comprising a shoe upper substrate and a coating structure disposed on a target area of ​​the shoe upper substrate, the coating structure being formed by an adhesive in an adhesive solution being fixed to the surface and interior of the target area. In this embodiment, content that is the same as or similar to embodiments one to four above can be referred to the above description, and will not be repeated hereafter.

[0087] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0088] The technical solution provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for coating woven fabrics, characterized in that, The method includes: An adhesive solution matching the wettability of the surface of the woven fabric to be coated is applied to a target area on the surface of the woven fabric to be coated. The adhesive solution penetrates at least partially into the interior of the woven fabric to be coated by means of capillary effect. The adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

2. The method for coating woven fabrics according to claim 1, characterized in that, The method further includes a process for determining an adhesive solution that matches the wettability of the surface of the woven fabric to be coated, including: Determine the substrate of the woven fabric to be coated; And when the substrate is a hydrophilic fiber, the adhesive solution is determined to be an aqueous adhesive solution; or, When the substrate is a hydrophobic fiber, the adhesive solution is determined to be an organic adhesive solution.

3. The method for coating woven fabrics according to claim 2, characterized in that, The method further includes: The woven fabric to be coated is dried after being coated with the adhesive solution to allow the solvent in the adhesive solution to evaporate, and the adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

4. The method for coating woven fabrics according to claim 3, characterized in that, The drying temperature for the drying process is 100-160℃, and the drying time is 10-30 minutes.

5. The method for coating woven fabrics according to any one of claims 1 to 4, characterized in that, The adhesive includes one of polyurethane, polyacrylic acid ester, polyurethane or polyacrylic acid ester modified adhesive, and multi-component polymer compound adhesive.

6. The method for coating woven fabrics according to any one of claims 1 to 4, characterized in that, The process of applying an adhesive solution with wettability matching that of the woven fabric to be coated to a target area of ​​the woven fabric surface includes: An adhesive solution matching the wettability of the woven fabric to be coated is applied to the target area of ​​the woven fabric surface by digital printing or screen printing.

7. The method for coating woven fabrics according to claim 6, characterized in that, When an adhesive solution matching the wettability of the woven fabric to be coated is applied to a target area of ​​the woven fabric surface by digital printing, the adhesive content in the adhesive solution is 15%-40%. When an adhesive solution matching the wettability of the woven fabric to be coated is applied to a target area of ​​the woven fabric surface by screen printing, the adhesive content in the adhesive solution is ≥50%.

8. The method for coating woven fabrics according to any one of claims 1 to 4, characterized in that, The adhesive solution also includes dispersants and / or colorants.

9. A woven fabric coating system, characterized in that, The system includes at least: A coating mechanism is configured to apply an adhesive solution that matches the wettability of the surface of the woven fabric to be coated to a target area of ​​the surface of the woven fabric to be coated. The adhesive solution penetrates at least partially into the interior of the woven fabric to be coated by means of capillary effect. The adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

10. The woven fabric coating system according to claim 9, characterized in that, The system also includes: The processing module is configured to determine the substrate of the woven fabric to be coated; and when the substrate is a hydrophilic fiber, determine that the adhesive solution is an aqueous adhesive solution; or when the substrate is a hydrophobic fiber, determine that the adhesive solution is an organic adhesive solution.

11. The woven fabric coating system according to claim 10, characterized in that, The system also includes: The drying mechanism is configured to dry the woven fabric to be coated after being coated with the adhesive solution, so that the solvent of the adhesive solution evaporates, and the adhesive in the adhesive solution is fixed to the surface and interior of the target area to form a coating structure on the target area.

12. A woven fabric, characterized in that, The invention includes a substrate and a coating structure disposed on the substrate, wherein the coating structure is formed on the substrate using the method described in any one of claims 1 to 8, or the coating structure is formed on the substrate using a coating system described in any one of claims 9 to 11.

13. A woven fabric, characterized in that, The invention includes a substrate and a coating structure disposed on a target area on the surface of the substrate, the coating structure being formed by an adhesive in an adhesive solution being fixed to the surface and interior of the target area.

14. A shoe upper, characterized in that, The upper includes an upper substrate and a coating structure formed on a target area of ​​the upper substrate using the method described in any one of claims 1 to 8; Alternatively, the upper may include an upper substrate and a coating structure formed on a target area of ​​the upper substrate using a coating system as described in any one of claims 9 to 11; Alternatively, the upper may be made from the woven fabric as described in claim 12 or 13; Alternatively, the shoe upper may include a shoe upper substrate and a coating structure disposed in a target area of ​​the shoe upper substrate, the coating structure being formed by an adhesive in an adhesive solution being fixed to the surface and interior of the target area.

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