Slurry-free treatment environment-friendly label fabric production process

Abstract

The invention belongs to the technical field of label fabric production, and discloses a slurry-free treatment environment-friendly label fabric production process, which comprises the following steps: S1, base material pretreatment and interface strengthening; s2, developing an intelligent ink system; s3, precise dynamic jet printing control; s4, an energy gradient curing system; and S5, function enhancement and cyclic regeneration. By removing impurities on the surface of the fiber and constructing a micro-nano barrier structure, dynamic balance between ink permeation inhibition and substrate flexibility is realized under a slurry-free condition, and dependence of a traditional process on chemical slurry is broken through; according to the intelligent ink system, through collaborative design of a photo-thermal dual-response mechanism and a nano reinforced material, the ink is endowed with a self-adjusting curing characteristic and anti-deformation capability, so that the capillary diffusion defect of low-viscosity ink is avoided, and the interface cracking risk caused by curing shrinkage is eliminated. Dynamic jet printing control is combined with a real-time deformation compensation algorithm, complex surfaces such as coarse lines and wrinkles are accurately adapted, and the pattern resolution and color uniformity are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of label fabric production, and in particular relates to a production process of environmentally friendly label fabric without sizing treatment. Background Art

[0002] Eco-labeled fabrics are textiles produced through eco-certification systems and sustainable technologies. Their core focus lies in the environmental friendliness of raw material selection, production processes, and end products. These fabrics typically use organic cotton, recycled polyester (such as RPET (recycled polyester) from plastic bottles), or bio-based fibers (such as Lyocell and hemp). These fabrics reduce resource consumption and chemical pollution at the source, and utilize low-temperature dyeing, waterless dyeing, and electron beam crosslinking techniques to reduce energy consumption and wastewater emissions.

[0003] Eco-friendly fabrics are produced without sizing, but there are still many shortcomings. Specifically, the material applicability is limited. Cotton single yarn needs to be treated with tension mercerization to increase its strength before it can be made sizing-free. However, this process is difficult to directly apply to conventional cotton fibers or blended single yarns that have not been modified. High-count, high-density, or new chemical fiber fabrics, due to their high yarn hairiness and low flex, still rely on traditional or environmentally friendly sizing agents to ensure weaving efficiency, limiting size-free technologies to a limited range of mid- and low-end fabrics. Mechanical properties and durability are insufficient. While mesh fabrics employing a weave design that replaces sizing avoid the use of chemical sizing, their open mesh structure is susceptible to yarn slippage during winding and lamination, requiring high-temperature yarn fixing processes that may release harmful substances such as formaldehyde. While desizing-free denim processes reduce wastewater discharge, residual dyes from insufficient desizing can affect subsequent softening, resulting in a stiff feel or reduced colorfastness. Process stability and environmental sustainability conflict exist. Some size-free technologies rely on alternative environmentally friendly sizing agents (such as polyacrylamide), but desizing rates remain difficult to achieve 100%, and residual sizing can affect fabric breathability and increase post-processing energy consumption. While size-free processes for digital silk printing reduce chemical oxygen demand, the addition of water repellents and softeners can alter fabric drape, and high-temperature steaming is required for color fixation, limiting actual energy savings. Summary of the Invention

[0004] The object of the present invention is to provide a production process for eco-friendly label fabrics without pulp treatment, so as to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a process for producing eco-friendly label fabric without sizing treatment, comprising the following steps: S1: substrate pretreatment and interface strengthening; S2: development of intelligent ink system; S3: Precision dynamic printing control; S4: energy gradient curing system; S5: Functional enhancement and recycling; The substrate pretreatment and interface strengthening include multi-stage bio-enzyme degreasing activation and nano-silicon green composite barrier layer construction, the intelligent ink system development includes dual-phase resin base material compounding and photothermal dual response function integration, the precision dynamic printing control includes multi-modal printing parameter optimization and fabric deformation compensation algorithm, the energy gradient curing system includes multi-spectral photocuring coupling and electron beam topological cross-linking, and the functional enhancement and recycling regeneration include bionic hydrophobic interface construction and reversible bonding cycle system.

[0006] As a further technical solution of the present invention, the multi-stage bio-enzyme degreasing and activation includes using a composite bio-enzyme treatment system to pretreat the cotton and linen blended substrate, preparing a cellulase and pectinase compound solution with enzyme activities of 1200U / g and 800U / g respectively, a treatment temperature of 45°C, a pH value of 5.5, and a treatment time of 60 minutes. The enzymatic hydrolysis efficiency is enhanced by ultrasonic auxiliary equipment to remove the wax layer and pectin on the fiber surface.

[0007] As a further technical solution of the present invention, the nano-silicon-aluminum composite barrier layer is constructed by mixing modified nano-silica and boehmite in a mass ratio of 7:3, preparing an aqueous dispersion with a particle size of 25±3nm and a solid content of 20%, using high-voltage electrostatic spraying equipment with a nozzle diameter of 0.25mm, a spraying pressure of 0.65MPa, a coating amount of 1.8g / m², and drying with hot air at 140°C to form a dense barrier layer with a thickness of 0.9μm.

[0008] As a further technical solution of the present invention, the dual-phase resin base material is compounded with hyperbranched polyester acrylate and silicone-modified polyurethane in a mass ratio of 5:5, the former has a viscosity of 15 mPa·s, and the latter has a molecular weight of 2200 Da. 2% nano zinc oxide whiskers are added as reinforcing fillers with a specific surface area of 200 m² / g and a diameter of 20 nm. A planetary mixer is used to mix for 45 minutes at a vacuum degree of -0.09 MPa and a rotation speed of 1000 rpm. The final ink viscosity is controlled at 20±1 mPa·s.

[0009] As a further technical solution of the present invention, the photothermal dual-response function is integrated by introducing 0.5% near-infrared absorber copper indium sulfur quantum dots with a particle size of 3nm and an excitation wavelength of 808nm, combined with 1.2% temperature-sensitive microcapsules coated with phase-change paraffin with a melting point of 42°C. The system simultaneously generates a local thermal effect during UV curing, promotes deep cross-linking, and compensates for curing shrinkage stress through thermal expansion effect.

[0010] As a further technical solution of the present invention, the multimodal printing parameter optimization includes selecting the Ricoh MH5420M nozzle group, configuring a dual closed-loop feedback system, setting the ink drop volume to 2.8pL, the ignition frequency to 55kHz, the nozzle temperature to 25.5±0.3℃, the printing height to 0.75mm, integrating a high-frame rate CCD vision system, and real-time calibration of the printing trajectory at a rate of 50 frames / second, with a positioning error of ≤15μm and a line width fluctuation rate of ±1.5%.

[0011] As a further technical solution of the present invention, the fabric deformation compensation algorithm includes developing a fabric surface topology modeling system based on deep learning, obtaining the three-dimensional morphology of the fabric in real time through a laser triangulation meter, dynamically adjusting the inkjet landing point, and implementing ink gradient compensation for coarse-grained fabrics, increasing the ink drop coverage by 8% in raised areas and reducing the ink coverage by 5% in recessed areas, thereby eliminating the color difference caused by texture.

[0012] As a further technical solution of the present invention, the multi-spectral photocuring coupling includes a 385nm UV-LED array for the initial curing stage, with an irradiance of 3200mW / cm² and an exposure time of 35ms, achieving a 92% crosslinking degree in the surface layer. The deep curing stage switches to a 405nm excimer lamp with a pulse frequency of 250Hz, an energy density of 1200mJ / cm², and a penetration depth of ≥25μm. A near-infrared auxiliary module is also added, with a wavelength of 980nm and a power density of 50W / cm².

[0013] As a further technical solution of the present invention, the electron beam topological crosslinking includes using a 7.5MeV electron accelerator, a beam current density of 15mA, a scanning speed of 2m / s, and applying an 18kGy dose to the edge area of the pattern for enhanced crosslinking through a three-dimensional dose distribution algorithm, and a dose of 15kGy to the center area to form a gradient network structure. After treatment, the ink layer hardness reaches 4H, the adhesion is 5B, and the bending resistance is ≥5000 times.

[0014] As a further technical solution of the present invention, the bionic hydrophobic interface construction includes the use of plasma-enhanced atomic layer deposition technology to deposit an alumina seed layer and a perfluorosiloxane functional layer on the surface of the ink layer in sequence. The deposition temperature is 110°C, the precursors are trimethylaluminum and perfluorooctyltriethoxysilane, the number of cycles is 200, and a super-hydrophobic film with a thickness of 80 nm is formed. The contact angle is ≥125° and the scrubbing resistance is ≥10,000 times. The reversible bonding cycle system includes the introduction of 2% dynamic covalent bond monomer dithioester to form a reversible cross-linked network under electron beam irradiation. During recovery, 80°C thermal field treatment is used in combination with 0.1 mol / L vitamin C solution immersion to achieve clean separation of the ink layer and the substrate. The substrate recovery rate is ≥95%, and the ink layer material reusability rate is ≥80%.

[0015] The beneficial effects of the present invention are as follows: 1. This invention systematically solves the core problems of high pollution, high energy consumption, and narrow applicability in the production of traditional eco-label fabrics by integrating green design with intelligent technology throughout the entire process. Substrate pretreatment uses the synergistic effect of bio-enzymatic hydrolysis and nano-composite coating to efficiently remove impurities on the fiber surface and construct a micro-nano barrier structure. This achieves a dynamic balance between ink penetration inhibition and substrate flexibility under slurry-free conditions, breaking through the traditional process's reliance on chemical slurries. The intelligent ink system, through the collaborative design of a photothermal dual-response mechanism and nano-reinforced materials, gives the ink self-regulating curing properties and deformation resistance, avoiding the capillary diffusion defects of low-viscosity inks while eliminating the risk of interfacial cracking caused by curing shrinkage. Dynamic printing control, combined with a real-time deformation compensation algorithm, accurately adapts to complex surfaces such as coarse grains and wrinkles, significantly improving pattern resolution and color uniformity.

[0016] 2. This invention utilizes a multi-spectral photocuring coupled electron beam topological crosslinking strategy, achieving simultaneous enhanced crosslinking of the ink layer's interior and exterior through graded energy input and three-dimensional dose control, balancing surface wear resistance with deep adhesion, thus overcoming the depth limitations of traditional curing processes. The combination of a biomimetic hydrophobic interface and a reversible bonding system not only creates a long-lasting protective barrier against water vapor erosion and mechanical wear, but also enables non-destructive separation of the substrate and ink layer through controlled dissociation of dynamic bonds, establishing a "production-recycling-regeneration" full lifecycle system. This technology deeply integrates high performance and sustainability, meeting the stringent requirements for weather resistance and bendability in medical devices, outdoor equipment, and other fields, while also reducing resource waste through material recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall process of the present invention; Figure 2 Schematic diagram of the process of substrate pretreatment and interface strengthening of the present invention; Figure 3 A schematic diagram of the process for developing the smart ink system of the present invention; Figure 4 Schematic diagram of the process of precise dynamic printing control of the present invention; Figure 5 Schematic diagram of the process of the energy gradient curing system of the present invention; Figure 6 It is a schematic diagram of the process of function enhancement and recycling regeneration of the present invention. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] like Figures 1 to 6 As shown in the embodiment of the present invention, a process for producing a sizing-free eco-friendly label fabric includes the following steps: S1: substrate pretreatment and interface strengthening; S2: development of intelligent ink system; S3: Precision dynamic printing control; S4: energy gradient curing system; S5: Functional enhancement and recycling; Substrate pretreatment and interface strengthening include multi-stage bio-enzyme degreasing and activation and nano-silicon green composite barrier layer construction; intelligent ink system development includes dual-phase resin base material compounding and photothermal dual response function integration; precision dynamic printing control includes multi-modal printing parameter optimization and fabric deformation compensation algorithm; energy gradient curing system includes multi-spectral photocuring coupling and electron beam topological cross-linking; functional enhancement and recycling regeneration include bionic hydrophobic interface construction and reversible bonding cycle system.

[0020] Through bio-enzymatic hydrolysis and nanocomposite technology, the substrate's surface properties are reconstructed, forming a highly active interface and dense barrier layer in a slurry-free process. This breaks the traditional process's reliance on chemical slurries and eliminates wastewater pollution at the source. An intelligent ink system, combined with a photothermal response mechanism, achieves self-adjusting curing, precisely matching the permeability of different fibers while simultaneously inhibiting ink diffusion and shrinkage cracking. A dynamic printing algorithm compensates for fabric texture deformation in real time, ensuring high-definition reproduction of complex surface patterns through adaptive ink droplet distribution. Gradient energy curing combines photothermal synergy with electron beam crosslinking to construct a three-dimensional stable ink layer structure, balancing deep curing efficiency and mechanical strength. A biomimetic hydrophobic interface and reversible bonding technology impart long-lasting protection to the product while enabling efficient separation and recovery of the substrate and ink layer, forming a closed-loop regeneration system. This comprehensive solution, centered on green manufacturing and intelligent control, addresses the pain points of eco-labeled fabric production, including high pollution, frequent leakage, poor durability, and difficult recycling.

[0021] like Figure 2 As shown, the multi-stage bio-enzyme degreasing and activation includes the use of a composite bio-enzyme treatment system to pretreat the cotton and linen blended substrate, preparing a cellulase and pectinase compound solution with enzyme activities of 1200U / g and 800U / g respectively, the treatment temperature is 45°C, the pH value is 5.5, the treatment time is 60 minutes, and the enzymatic hydrolysis efficiency is enhanced by ultrasonic auxiliary equipment to remove the wax layer and pectin on the fiber surface. The construction of the nano-silica-aluminum composite barrier layer includes mixing modified nano-silica and boehmite in a mass ratio of 7:3, preparing an aqueous dispersion with a particle size of 25±3nm and a solid content of 20%, using high-voltage electrostatic spraying equipment with a nozzle diameter of 0.25mm, a spraying pressure of 0.65MPa, a coating amount of 1.8g / m², and drying with hot air at 140°C to form a dense barrier layer with a thickness of 0.9μm.

[0022] Through the synergistic effect of bio-enzymatic hydrolysis and nano-composite coating, targeted optimization of substrate surface properties and long-term protection are achieved. Multi-stage bio-enzymatic treatment effectively removes hydrophobic impurities on the fiber surface and constructs a highly active interface, significantly improving the wettability of the substrate and the bonding strength of the subsequent coating; the nano-composite barrier layer, with its finely regulated microstructure and dense stacking characteristics, effectively closes the fiber gaps and blocks the ink penetration channels, while maintaining the original air permeability and flexibility of the fabric. The two work together to form a dual physical and chemical protection mechanism, which not only overcomes the ink diffusion defects caused by insufficient substrate pretreatment in traditional pulp-free processes, but also avoids the environmental pollution caused by the use of chemical pulp. This composite technology provides a stable substrate for high-precision inkjet printing by dynamically balancing surface activation and barrier enhancement, ensuring the clarity and durability of patterns on complex textured fabrics.

[0023] like Figure 3 As shown, the dual-phase resin base compound consists of a 5:5 mass ratio of hyperbranched polyester acrylate and silicone-modified polyurethane. The former has a viscosity of 15 mPa·s and the latter has a molecular weight of 2200 Da. 2% nano-zinc oxide whiskers are added as reinforcing fillers with a specific surface area of 200 m² / g and a diameter of 20 nm. Mixing is carried out in a planetary mixer at a vacuum of -0.09 MPa and a rotation speed of 1000 rpm for 45 minutes, and the final ink viscosity is controlled at 20±1 mPa·s. The photothermal dual-responsive function is integrated by introducing 0.5% copper indium sulfide quantum dots (3 nm near-infrared absorbers) with an excitation wavelength of 808 nm. These are combined with 1.2% thermosensitive microcapsules coated with phase-change paraffin wax with a melting point of 42°C. This system generates a localized thermal effect during UV curing, promoting deep crosslinking and compensating for curing shrinkage stress through thermal expansion.

[0024] Through the coordinated design of resin base compounding and photothermal response, an intelligent ink system with both high-precision printing suitability and deep curing stability is constructed. The two-phase resin base is mixed in a specific proportion to form an interpenetrating network structure. The low viscosity of the hyperbranched resin ensures smooth printing. The silicone-modified polyurethane provides a flexible skeleton, and the combination with nano-scale reinforcing materials improves the mechanical strength and deformation resistance of the ink layer. The photothermal dual response system uses the quantum dot photothermal conversion effect to simultaneously trigger the microcapsule phase change to release heat energy during curing, achieving self-driven deep cross-linking of the ink, while offsetting the curing shrinkage stress through the thermal expansion effect to avoid the formation of microcracks. The two work together to break through the bottlenecks of insufficient curing depth and weak interfacial bonding of traditional UV inks, allowing the ink to form a dense and strong fixing layer on the pulp-free substrate, ensuring the precise shaping and long-term maintenance of high-resolution patterns on complex fabric surfaces.

[0025] like Figure 4As shown, the multimodal printing parameter optimization includes the selection of Ricoh MH5420M nozzle group, configuration of dual closed-loop feedback system, setting the ink drop volume to 2.8pL, ignition frequency to 55kHz, nozzle temperature to 25.5±0.3℃, printing height to 0.75mm, integration of high frame rate CCD vision system, real-time calibration of the printing trajectory at a rate of 50 frames / second, positioning error ≤15μm, line width fluctuation rate ±1.5%, and fabric deformation compensation algorithm including the development of a fabric surface topology modeling system based on deep learning, real-time acquisition of fabric three-dimensional morphology through a laser triangulation meter, dynamic adjustment of inkjet landing point, implementation of ink gradient compensation for coarse-grained fabrics, increasing ink drop coverage by 8% in raised areas and reducing ink by 5% in recessed areas, eliminating color difference caused by texture.

[0026] Through intelligent printing control and dynamic compensation technology, high-precision pattern shaping is achieved for complex textured fabrics. Multimodal printing parameter optimization combined with a highly sensitive feedback system precisely controls the spray trajectory and landing point distribution of ultra-fine droplets, ensuring ink layer uniformity under high-speed printing. A deep learning-driven deformation compensation algorithm analyzes the fabric surface topology in real time and adaptively adjusts printing parameters through an intelligent ink distribution strategy to eliminate ink diffusion or loss caused by fiber fluctuations. These two technologies work together to overcome the traditional inkjet process's reliance on flat substrates, achieving submicron pattern restoration on irregular surfaces such as coarse grain and wrinkles, significantly improving color gamut saturation and edge clarity.

[0027] like Figure 5 As shown, multi-spectral photocuring coupling includes a 385nm UV-LED array in the initial curing stage, with an irradiance of 3200mW / cm² and an exposure time of 35ms, achieving a 92% crosslinking degree in the surface layer. The deep curing stage switches to a 405nm excimer lamp with a pulse frequency of 250Hz, an energy density of 1200mJ / cm², and a penetration depth of ≥25μm. A near-infrared auxiliary module is added with a wavelength of 980nm and a power density of 50W / cm². Electron beam topological crosslinking includes a 7.5MeV electron accelerator with a beam current density of 15mA and a scanning speed of 2m / s. Through a three-dimensional dose distribution algorithm, an 18kGy dose is applied to the edge area of the pattern to enhance crosslinking, and a 15kGy dose is applied to the center area to form a gradient network structure. After treatment, the ink layer has a hardness of 4H, an adhesion of 5B, and a bending resistance of ≥5000 times.

[0028] Through multi-spectral energy synergy and topological cross-linking technology, three-dimensional strengthening of the ink layer structure and performance breakthroughs are achieved. Multi-band photocuring adopts a hierarchical energy input strategy. The short-wavelength light source quickly locks the surface morphology to prevent leakage, and the long-wavelength light source penetrates the substrate to trigger deep cross-linking. Combined with the near-infrared thermal effect, it promotes the orderly arrangement of molecular chains, solving the contradiction between over-curing of the surface layer and under-curing of the bottom layer in traditional curing. Electron beam topological cross-linking uses intelligent dose control to build a high-density cross-linking network at the edge of the pattern to enhance mechanical strength, while maintaining moderate flexibility in the center area to prevent brittle fracture, forming a gradient structure that is both rigid and flexible. The two work together to eliminate curing shrinkage stress and interface microcracks, so that the ink layer still maintains excellent adhesion and anti-fatigue properties under complex deformation.

[0029] like Figure 6 As shown, the construction of the bionic hydrophobic interface includes the use of plasma-enhanced atomic layer deposition technology to deposit an aluminum oxide seed layer and a perfluorosiloxane functional layer on the surface of the ink layer in sequence. The deposition temperature is 110°C, the precursors are trimethylaluminum and perfluorooctyltriethoxysilane, the number of cycles is 200, and a super-hydrophobic film with a thickness of 80 nm is formed. The contact angle is ≥125° and the scrubbing resistance is ≥10,000 times. The reversible bonding cycle system includes the introduction of 2% dynamic covalent bond monomer dithioester to form a reversible cross-linked network under electron beam irradiation. During recycling, 80°C thermal field treatment is used in combination with 0.1 mol / L vitamin C solution immersion to achieve clean separation of the ink layer and the substrate. The substrate recovery rate is ≥95%, and the ink layer material reusability rate is ≥80%.

[0030] Through bionic interface design and dynamic bonding technology, the label fabric is endowed with the dual characteristics of long-term protection and recyclability. The bionic hydrophobic interface constructs a micro-nano structure with a gradient composite film layer to form a stable super-hydrophobic barrier, effectively resisting liquid penetration and mechanical wear, and greatly improving the durability of the label in extreme environments; the reversible bonding system uses the stimulus response characteristics of the dynamic bond to achieve a gentle separation of the ink layer and the substrate, which not only retains the integrity of the substrate for easy reuse, but also realizes the directional recycling and regeneration of the ink layer material. The two work together to break through the bottleneck of resource waste caused by the one-time use of traditional labels, and build a "production-use-regeneration" closed-loop system to reduce waste pollution while maintaining product high performance. This technology deeply integrates the principles of bionics with green chemistry to solve the difficult problem of balancing the protection and recyclability of environmentally friendly labels.

[0031] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A process for producing eco-friendly label fabrics without sizing, characterized by: The following steps are involved: S1: substrate pretreatment and interface strengthening; S2: development of intelligent ink system; S3: Precision dynamic printing control; S4: energy gradient curing system; S5: Functional enhancement and recycling; The substrate pretreatment and interface strengthening include multi-stage bio-enzyme degreasing activation and nano-silicon green composite barrier layer construction, the intelligent ink system development includes dual-phase resin base material compounding and photothermal dual response function integration, the precision dynamic printing control includes multi-modal printing parameter optimization and fabric deformation compensation algorithm, the energy gradient curing system includes multi-spectral photocuring coupling and electron beam topological cross-linking, and the functional enhancement and recycling regeneration include bionic hydrophobic interface construction and reversible bonding cycle system.

2. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The multi-stage bio-enzyme degreasing and activation includes using a composite bio-enzyme treatment system to pretreat the cotton and linen blended substrate, preparing a cellulase and pectinase compound solution with enzyme activities of 1200U / g and 800U / g respectively, a treatment temperature of 45°C, a pH value of 5.5, and a treatment time of 60 minutes. Ultrasonic-assisted equipment is used to enhance the enzymatic hydrolysis efficiency and remove the wax layer and pectin on the fiber surface.

3. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The nano-silicon-aluminum composite barrier layer is constructed by mixing modified nano-silica and boehmite in a mass ratio of 7:3, preparing an aqueous dispersion with a particle size of 25±3nm and a solid content of 20%, using high-voltage electrostatic spraying equipment with a nozzle diameter of 0.25mm, a spraying pressure of 0.65MPa, a coating amount of 1.8g / m², and drying with hot air at 140°C to form a dense barrier layer with a thickness of 0.9μm.

4. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The dual-phase resin base material is compounded with hyperbranched polyester acrylate and silicone-modified polyurethane in a mass ratio of 5:

5. The former has a viscosity of 15 mPa·s and the latter has a molecular weight of 2200 Da. 2% nano zinc oxide whiskers are added as reinforcing fillers with a specific surface area of 200 m² / g and a diameter of 20 nm. A planetary mixer is used to mix the mixture for 45 minutes at a vacuum degree of -0.09 MPa and a rotation speed of 1000 rpm. The final ink viscosity is controlled at 20±1 mPa·s.

5. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The photothermal dual-response function is integrated by introducing 0.5% near-infrared absorber copper indium sulfur quantum dots with a particle size of 3nm and an excitation wavelength of 808nm, combined with 1.2% temperature-sensitive microcapsules coated with phase-change paraffin with a melting point of 42°C. The system simultaneously generates a local thermal effect during UV curing, promotes deep cross-linking, and compensates for curing shrinkage stress through thermal expansion effect.

6. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The multimodal printing parameter optimization includes selecting the Ricoh MH5420M nozzle group, configuring a dual closed-loop feedback system, setting the ink drop volume to 2.8pL, the ignition frequency to 55kHz, the nozzle temperature to 25.5±0.3℃, the printing height to 0.75mm, integrating a high-frame rate CCD vision system, and real-time calibration of the printing trajectory at a rate of 50 frames per second, with a positioning error of ≤15μm and a line width fluctuation rate of ±1.5%.

7. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The fabric deformation compensation algorithm includes developing a fabric surface topology modeling system based on deep learning, obtaining the three-dimensional morphology of the fabric in real time through a laser triangulation meter, dynamically adjusting the inkjet landing point, and implementing ink gradient compensation for coarse-grained fabrics, increasing the ink drop coverage by 8% in raised areas and reducing the ink coverage by 5% in recessed areas, thereby eliminating the color difference caused by texture.

8. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The multi-spectral photocuring coupling includes a 385nm UV-LED array for the initial curing stage, with an irradiance of 3200mW / cm² and an exposure time of 35ms, achieving a 92% crosslinking degree in the surface layer. The deep curing stage switches to a 405nm excimer lamp with a pulse frequency of 250Hz, an energy density of 1200mJ / cm², and a penetration depth of ≥25μm. A near-infrared auxiliary module is also added, with a wavelength of 980nm and a power density of 50W / cm².

9. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The electron beam topological cross-linking includes using a 7.5MeV electron accelerator, a beam current density of 15mA, a scanning speed of 2m / s, and applying an 18kGy dose to the edge area of the pattern through a three-dimensional dose distribution algorithm to enhance cross-linking, and a dose of 15kGy to the center area to form a gradient network structure. After treatment, the ink layer has a hardness of 4H, an adhesion of 5B, and a bending resistance of ≥5000 times.

10. The process for producing a sizing-free eco-label fabric according to claim 1, characterized in that: The bionic hydrophobic interface construction includes the use of plasma-enhanced atomic layer deposition technology to sequentially deposit an aluminum oxide seed layer and a perfluorosiloxane functional layer on the surface of the ink layer. The deposition temperature is 110°C, the precursors are trimethylaluminum and perfluorooctyltriethoxysilane, the number of cycles is 200, and a super-hydrophobic film with a thickness of 80 nm is formed. The contact angle is ≥125° and the scrubbing resistance is ≥10,000 times. The reversible bonding cycle system includes the introduction of 2% dynamic covalent bond monomer dithioester to form a reversible cross-linked network under electron beam irradiation. During recycling, 80°C thermal field treatment is used in combination with 0.1 mol / L vitamin C solution immersion to achieve clean separation of the ink layer and the substrate. The substrate recovery rate is ≥95%, and the ink layer material reusability rate is ≥80%.

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