A three-layer cloth dissolving and developing manufacturing process

Abstract

This invention relates to the field of textile and fabric technology, and provides a three-layer fabric dissolution and pattern revealing process, comprising the following steps: selecting three layers of fabric, including a top layer, a middle layer, and a bottom layer, and laminating the three layers; designing the shape, size, and position of the pattern; using laser engraving equipment to engrave the pattern outline on the middle layer of the three layers of fabric; and dissolving the engraved area with an environmentally friendly solvent to reveal the pattern naturally. The three-layer fabric dissolution and pattern revealing process provided by this invention features high precision laser engraving, resulting in smooth lines and clear edges; high speed, suitable for mass production; non-contact processing, avoiding fabric damage; use of environmentally friendly solvents, which are environmentally friendly, non-toxic, and volatile; a gentle dissolution process that does not damage the fabric fiber structure; and the use of hot pressing or ultrasonic lamination technology, which has no adverse effects on the fabric's breathability and feel.

Description

Technical Field

[0001] This invention belongs to the field of textile and fabric technology, and particularly relates to a process for creating a three-layer fabric melting and patterning process. Background Technology

[0002] In the textile and fabric decoration industry, pattern presentation has always been key to enhancing product added value. Traditional pattern-making techniques, such as printing and embroidery, while technically mature, fall short in terms of achieving a sense of fabric layering and three-dimensional pattern representation. In recent years, as consumers' pursuit of fabric quality and design has increased, the three-layer fabric composite pattern-making process has emerged. This process combines three layers of fabric of different materials or colors to create rich layers and unique visual effects.

[0003] However, existing three-layer fabric composite pattern manufacturing processes have some problems. First, the pattern presentation often relies on processes such as printing or embroidery, which can easily lead to blurry patterns and uneven colors when applied to three layers of fabric. Second, the adhesives used in the lamination process may negatively affect the fabric's breathability and feel. Finally, after washing or prolonged use, the laminated fabric is prone to pattern peeling or deformation, affecting the product's durability and aesthetics.

[0004] Therefore, how to develop a dissolution and development process that can maintain the three-dimensionality of the composite pattern of three-layer fabric, ensure the clarity and vibrancy of the pattern, and not affect the original properties of the fabric has become a pressing technical problem in the field of fabric pattern making. Summary of the Invention

[0005] This invention provides a three-layer fabric melting and patterning process to solve the above-mentioned problems.

[0006] This invention is achieved through a three-layer fabric melting and patterning process, comprising the following steps: Choose a three-layer fabric, including an outer layer, a middle layer, and a bottom layer, and then laminate the three layers together. The shape, size, and position of the design pattern can be determined by drawing the pattern using computer-aided design software, and then importing the pattern file into the control system of the laser engraving equipment. The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

[0007] Laser engraving creates tiny holes or grooves on the fabric, increasing the contact area between the solvent and the target layer, accelerating the dissolution process, and improving dissolution efficiency. The structure of the engraved area is disrupted, allowing the solvent to penetrate the target layer more easily, achieving rapid and uniform dissolution. The solvent penetrates the engraved area through capillary action and diffuses between the fabric fibers, gradually dissolving the target layer. The low viscosity and high volatility of the solvent enable it to penetrate quickly and distribute evenly, ensuring consistent dissolution effects across the patterned area. Once the target layer is dissolved, the structure between the surface and the underlying layers changes, creating a visual contrast that naturally reveals the pattern. For example, if the intermediate layer is completely dissolved, the translucency of the surface layer increases, allowing the color or texture of the underlying layer to show through, forming the pattern.

[0008] Preferably, the outer and bottom layers of the three-layer fabric are made of cotton, silk, or nylon, and the middle layer is made of polyester fiber or cellulose acetate fiber.

[0009] Preferably, the three-layer fabric is laminated using hot pressing or ultrasonic bonding technology.

[0010] Hot-press lamination: Three layers of fabric are placed in a hot-pressing device and laminated by heating and pressurizing. The hot-pressing parameters (temperature, pressure, time) are adjusted according to the fabric material to ensure that each layer is tightly bonded.

[0011] Ultrasonic lamination: Three layers of fabric are laminated using ultrasonic equipment. The heat generated by high-frequency vibration fuses the fibers. This method is suitable for certain special fabric materials.

[0012] Preferably, the process of engraving the pattern outline on the middle layer of the three-layer fabric using a laser engraving device specifically involves: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

[0013] Laser engraving offers high precision, producing smooth lines and sharp edges; it is fast, making it suitable for mass production; and it is a non-contact process, avoiding damage to the fabric.

[0014] Modern laser engraving equipment possesses high-precision control capabilities, enabling micron-level engraving depth control. By adjusting parameters such as laser power, speed, and focal length, the penetration depth of the laser into the material can be precisely controlled. For multi-layered materials (such as three layers of fabric), laser engraving equipment can achieve engraving only on the middle layer through the following methods: Parameter optimization: Determining suitable laser parameters for the fabric material through experimentation to ensure that laser energy acts only on the middle layer. Focus control: Precisely aligning the laser focus with the middle layer to prevent energy diffusion to the surface or bottom layers. Layered scanning: Employing layered scanning technology to progressively engrave the middle layer while monitoring the engraving depth.

[0015] Selective absorption of laser energy – Different materials have different absorption rates of laser energy. By selecting an appropriate laser wavelength, the laser energy can be made to be mainly absorbed by the intermediate layer, while the surface and bottom layers absorb less. For example, if the intermediate layer is polyester fiber and the surface layer is cotton, a laser wavelength with a high absorption rate for polyester (such as a 10.6 μm CO2 laser) can be selected.

[0016] Precise control of the laser focus – the laser focus is precisely aligned with the intermediate layer, ensuring that energy is concentrated in the target area. The surface and bottom layers are outside the focus and receive lower laser energy, insufficient to cause damage.

[0017] Laser parameter optimization - Low power: Using lower laser power ensures sufficient energy to engrave only the intermediate layers without penetrating the surface. High speed: Rapid scanning reduces the time the laser spends on the surface, preventing heat accumulation. Short pulse: Pulsed lasers reduce the heat-affected zone, avoiding thermal damage to the surface.

[0018] Protective measures - During the engraving process, a protective film can be applied to the surface or a cooling device can be used to further reduce the potential impact of the laser on the surface.

[0019] Preferably, the engraving parameters of the laser engraving equipment include a power of 10-50W, a speed of 100-500mm / s, and a focal length adjusted according to the thickness of the fabric to ensure a suitable engraving depth.

[0020] Preferably, the environmentally friendly solvent is an environmentally friendly organic solvent or a water-based solvent, which is environmentally friendly, non-toxic, and volatile; it has no adverse effect on the breathability and feel of the fabric; the dissolution process is gentle and does not damage the fabric fiber structure. The environmentally friendly organic solvent can be ethyl acetate, acetone, ethyl lactate, etc., and the environmentally friendly water-based solvent can be an alkaline aqueous solution (such as 1-5% sodium carbonate aqueous solution, 0.5-2% sodium hydroxide aqueous solution) and a surfactant aqueous solution (such as 0.1-1% alkyl glycoside aqueous solution, 0.1-1% Tween aqueous solution), etc.

[0021] Preferably, the process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to react with the intermediate layer, dissolving the engraved parts and revealing the pattern naturally; the dissolution time is 3-10 minutes, which can be adjusted according to the solvent and fabric material. After dissolving, wash the fabric with clean water or a neutral detergent to remove any residual solvent; After washing, air dry or tumble dry at low temperature to ensure the fabric regains its original feel and breathability.

[0022] The solvent's ability to dissolve a specific material is based on the principle of "like dissolves like," meaning that the dissolving effect is optimal when the chemical properties of the solvent are similar to those of the target material. In this process, the solvent is designed to selectively dissolve one of the three layers of fabric (usually the middle layer), while having no significant effect on the other layers (top and bottom layers). For example, if the middle layer is polyester fiber, the solvent can be an organic solvent that can dissolve polyester but not cotton or nylon. Environmentally friendly solvents are typically low in toxicity, volatile, and biodegradable, ensuring the process is environmentally friendly. The solvent evaporates quickly after use, leaving no harmful residues on the fabric, and does not affect the fabric's breathability or feel. The solvent is designed to dissolve only the target layer without damaging the fiber structure of the top and bottom layers. By controlling the chemical composition and reaction time of the solvent, the dissolution process is ensured to be gentle, avoiding adverse effects on the overall performance of the fabric.

[0023] Preferably, before laminating the three layers of fabric, the middle layer is pretreated, and the pretreatment method specifically includes: The intermediate layer is treated with a low-temperature plasma device for 1-3 minutes at a power of 100-500W. The intermediate layer can be placed inside the treatment chamber of the plasma device. The device is then started, and the plasma treats the surface of the intermediate layer. After treatment, the fabric is removed. Plasma treatment can form a micro-nano-scale rough structure on the surface of the intermediate layer, improving the adhesion and precision of laser engraving. It can also introduce polar groups (such as hydroxyl and carboxyl groups) to enhance the chemical activity of the fabric surface and improve the laser engraving effect. Immerse the plasma-treated intermediate layer in the composite finishing solution for 5-15 minutes. Dry the prepared intermediate layer at 50-60℃; The composite finishing liquid comprises the following raw materials in parts by weight: 10-15 parts of polydimethylsiloxane, 6-12 parts of modified chitosan, 5-10 parts of modified betaine, and 30-40 parts of deionized water.

[0024] By using a composite finishing solution, static electricity accumulation on the surface of the intermediate layer is reduced, preventing static interference during laser engraving, improving engraving accuracy, and making the surface of the intermediate layer smoother, reducing laser scattering, and improving engraving clarity.

[0025] Preferably, the modified chitosan is prepared as follows: Chitosan with an average molecular weight of 620,000 and a degree of deacetylation of 90-95% is added to a 2-5% sodium hydroxide solution (6-10 times its weight). The solution is then leached at -15 to -10°C for 20-30 hours. The mixture is filtered and dried to obtain an intermediate. This intermediate is then added to a 1% acetic acid solution (8-12 times its weight). The solution is treated with a microwave at 200-400W for 10-20 minutes. The product is precipitated with ethanol, washed, and dried to obtain the modified chitosan. First, the chitosan is swollen by sodium hydroxide. Then, the thermal and non-thermal effects of microwaves are utilized to break the glycosidic bonds of the chitosan, reducing its molecular weight and enhancing its water solubility, allowing it to be fully distributed in the intermediate layer.

[0026] Preferably, the modified betaine is prepared as follows: 15-20 parts by weight of betaine, 5-10 parts by weight of sodium lignosulfonate, and 40-50 parts by weight of deionized water are mixed evenly, and 1-5 parts by weight of polyethylene glycol are added and stirred evenly. The mixture is then reacted at 50-60°C for 50-80 minutes. The product is then precipitated with ethanol, washed, and dried to obtain the modified betaine. First, sodium lignosulfonate modifies the betaine, reducing its surface tension and increasing its surface activity. Then, polyethylene glycol is used to improve the antistatic properties of the betaine, thereby giving the intermediate layer better antistatic properties.

[0027] Compared with the prior art, the embodiments of this application have the following main advantages: The three-layer fabric melting and patterning process provided by this invention uses laser engraving to create patterns with high precision, smooth lines, and clear edges; it is fast and suitable for mass production; it is a non-contact process that avoids fabric damage; it uses environmentally friendly solvents that are environmentally friendly, non-toxic, and volatile; the melting process is gentle and does not damage the fabric fiber structure; and it uses hot pressing or ultrasonic composite technology, which has no adverse effects on the fabric's breathability and feel. Attached Figure Description

[0028] Figure 1 This is a flowchart of a three-layer fabric melting and display process provided by the present invention.

[0029] Figure 2 This is another flowchart of a three-layer fabric melting and display process provided by the present invention. Detailed Implementation

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] Example 1 This invention provides a three-layer fabric melting and patterning process, such as... Figure 1 As shown, it includes the following steps: Choose a three-layer fabric, including an outer layer, a middle layer, and a bottom layer, and then laminate the three layers together. The shape, size, and position of the design pattern can be determined by drawing the pattern using computer-aided design software, and then importing the pattern file into the control system of the laser engraving equipment. The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

[0033] In this embodiment, the outer layer of the three-layer fabric is cotton, the middle layer is polyester fiber, and the bottom layer is nylon.

[0034] In practice, the three-layer fabric is laminated using either hot pressing or ultrasonic bonding technology.

[0035] In this embodiment, hot-pressing composite is used: three layers of fabric are placed in a hot-pressing device and bonded together by heating and pressurizing. The hot-pressing parameters (temperature, pressure, time) are adjusted according to the fabric material to ensure that each layer is tightly bonded.

[0036] In this embodiment, the specific steps of using a laser engraving device to engrave the pattern outline on the middle layer of the three-layer fabric are as follows: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

[0037] Preferably, the engraving parameters of the laser engraving equipment include a power of 10W, a speed of 100mm / s, and a focal length adjusted according to the thickness of the fabric to ensure a suitable engraving depth.

[0038] In this embodiment, the environmentally friendly solvent is an environmentally friendly organic solvent or a water-based solvent, which is environmentally friendly, non-toxic, and volatile; it has no adverse effect on the breathability and feel of the fabric; the dissolution process is gentle and does not damage the fabric fiber structure. In this embodiment, the environmentally friendly organic solvent can be ethyl acetate, and the environmentally friendly water-based solvent can be a 0.5% sodium hydroxide aqueous solution, which has the characteristics of being environmentally friendly, non-toxic, and volatile, and can selectively dissolve the intermediate layer material while ensuring the fabric performance and pattern quality.

[0039] Furthermore, the process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to react with the intermediate layer, dissolving the engraved parts and revealing the pattern naturally; the dissolution time is 3 minutes, which can be adjusted according to the solvent and fabric material. After dissolving, the fabric can be washed with water or a neutral detergent to remove residual solvent; After washing, air dry or tumble dry at low temperature to ensure the fabric regains its original feel and breathability.

[0040] Example 2 This invention provides a three-layer fabric melting and patterning process, such as... Figure 1 As shown, it includes the following steps: Choose a three-layer fabric, including an outer layer, a middle layer, and a bottom layer, and then laminate the three layers together. The shape, size, and position of the design pattern can be determined by drawing the pattern using computer-aided design software, and then importing the pattern file into the control system of the laser engraving equipment. The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

[0041] In this embodiment, the outer layer of the three-layer fabric is silk, the middle layer is polyester fiber, and the bottom layer is nylon.

[0042] In practice, the three-layer fabric is laminated using either hot pressing or ultrasonic bonding technology.

[0043] This embodiment employs ultrasonic bonding: three layers of fabric are bonded together using ultrasonic equipment, and the heat generated by high-frequency vibration fuses the fibers, making it suitable for certain special fabric materials.

[0044] In this embodiment, the specific steps of using a laser engraving device to engrave the pattern outline on the middle layer of the three-layer fabric are as follows: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

[0045] Preferably, the engraving parameters of the laser engraving equipment include a power of 20W, a speed of 200mm / s, and a focal length that is adjusted according to the thickness of the fabric to ensure a suitable engraving depth.

[0046] In this embodiment, the environmentally friendly solvent is an environmentally friendly organic solvent or a water-based solvent, which is environmentally friendly, non-toxic, and volatile; it has no adverse effect on the breathability and feel of the fabric; the dissolution process is gentle and does not damage the fabric fiber structure. The environmentally friendly organic solvent can be acetone, and the environmentally friendly water-based solvent can be a 0.8% sodium hydroxide aqueous solution, which has the characteristics of being environmentally friendly, non-toxic, and volatile, and can selectively dissolve the intermediate layer material while ensuring the fabric performance and pattern quality.

[0047] Furthermore, the process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to react with the intermediate layer, dissolving the engraved parts and revealing the pattern naturally; the dissolution time is 4 minutes, which can be adjusted according to the solvent and fabric material. After dissolving, the fabric can be washed with water or a neutral detergent to remove residual solvent; After washing, air dry or tumble dry at low temperature to ensure the fabric regains its original feel and breathability.

[0048] Example 3 This invention provides a three-layer fabric melting and patterning process, such as... Figure 1 As shown, it includes the following steps: Choose a three-layer fabric, including an outer layer, a middle layer, and a bottom layer, and then laminate the three layers together. The shape, size, and position of the design pattern can be determined by drawing the pattern using computer-aided design software, and then importing the pattern file into the control system of the laser engraving equipment. The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

[0049] In this embodiment, the outer layer of the three-layer fabric is cotton, the middle layer is cellulose acetate, and the bottom layer is silk.

[0050] In practice, the three-layer fabric is laminated using either hot pressing or ultrasonic bonding technology.

[0051] In this embodiment, hot-pressing composite is used: three layers of fabric are placed in a hot-pressing device and bonded together by heating and pressurizing. The hot-pressing parameters (temperature, pressure, time) are adjusted according to the fabric material to ensure that each layer is tightly bonded.

[0052] In this embodiment, the specific steps of using a laser engraving device to engrave the pattern outline on the middle layer of the three-layer fabric are as follows: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

[0053] Preferably, the engraving parameters of the laser engraving equipment include a power of 30W, a speed of 300mm / s, and a focal length that is adjusted according to the thickness of the fabric to ensure a suitable engraving depth.

[0054] In this embodiment, the environmentally friendly solvent is an environmentally friendly organic solvent or a water-based solvent, which is environmentally friendly, non-toxic, and volatile; it has no adverse effect on the breathability and feel of the fabric; the dissolution process is gentle and does not damage the fabric fiber structure. The environmentally friendly organic solvent can be acetone, and the environmentally friendly water-based solvent can be a 1% sodium carbonate aqueous solution. It has the characteristics of being environmentally friendly, non-toxic, and volatile, and can selectively dissolve the intermediate layer material while ensuring the fabric performance and pattern quality.

[0055] Furthermore, the process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to react with the intermediate layer, dissolving the engraved parts and revealing the pattern naturally; the dissolution time is 3 minutes, which can be adjusted according to the solvent and fabric material. After dissolving, the fabric can be washed with water or a neutral detergent to remove residual solvent; After washing, air dry or tumble dry at low temperature to ensure the fabric regains its original feel and breathability.

[0056] Example 4 This invention provides a three-layer fabric melting and patterning process, such as... Figure 1 As shown, it includes the following steps: Choose a three-layer fabric, including an outer layer, a middle layer, and a bottom layer, and then laminate the three layers together. The shape, size, and position of the design pattern can be determined by drawing the pattern using computer-aided design software, and then importing the pattern file into the control system of the laser engraving equipment. The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

[0057] In this embodiment, the outer layer of the three-layer fabric is cotton, the middle layer is cellulose acetate, and the bottom layer is nylon.

[0058] In practice, the three-layer fabric is laminated using either hot pressing or ultrasonic bonding technology.

[0059] This embodiment employs ultrasonic bonding: three layers of fabric are bonded together using ultrasonic equipment, and the heat generated by high-frequency vibration fuses the fibers, making it suitable for certain special fabric materials.

[0060] In this embodiment, the specific steps of using a laser engraving device to engrave the pattern outline on the middle layer of the three-layer fabric are as follows: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

[0061] Preferably, the engraving parameters of the laser engraving equipment include a power of 40W, a speed of 400mm / s, and a focal length adjusted according to the thickness of the fabric to ensure a suitable engraving depth.

[0062] In this embodiment, the environmentally friendly solvent is an environmentally friendly organic solvent or a water-based solvent, which is environmentally friendly, non-toxic, and volatile; it has no adverse effect on the breathability and feel of the fabric; the dissolution process is gentle and does not damage the fabric fiber structure. The environmentally friendly organic solvent can be ethyl lactate, and the environmentally friendly water-based solvent can be a 1% alkyl glycoside aqueous solution, which has the characteristics of being environmentally friendly, non-toxic, and volatile, and can selectively dissolve the intermediate layer material while ensuring the fabric performance and pattern quality.

[0063] Furthermore, the process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to react with the intermediate layer, dissolving the engraved parts and revealing the pattern naturally; the dissolution time is 3 minutes, which can be adjusted according to the solvent and fabric material. After dissolving, the fabric can be washed with water or a neutral detergent to remove residual solvent; After washing, air dry or tumble dry at low temperature to ensure the fabric regains its original feel and breathability.

[0064] Example 5 This invention provides a three-layer fabric melting and patterning process, such as... Figure 1 As shown, it includes the following steps: Choose a three-layer fabric, including an outer layer, a middle layer, and a bottom layer, and then laminate the three layers together. The shape, size, and position of the design pattern can be determined by drawing the pattern using computer-aided design software, and then importing the pattern file into the control system of the laser engraving equipment. The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

[0065] In this embodiment, the outer layer of the three-layer fabric is cotton, the middle layer is polyester fiber, and the bottom layer is silk.

[0066] In practice, the three-layer fabric is laminated using either hot pressing or ultrasonic bonding technology.

[0067] In this embodiment, hot-pressing composite is used: three layers of fabric are placed in a hot-pressing device and bonded together by heating and pressurizing. The hot-pressing parameters (temperature, pressure, time) are adjusted according to the fabric material to ensure that each layer is tightly bonded.

[0068] In this embodiment, the specific steps of using a laser engraving device to engrave the pattern outline on the middle layer of the three-layer fabric are as follows: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

[0069] Preferably, the engraving parameters of the laser engraving equipment include a power of 50W, a speed of 500mm / s, and a focal length adjusted according to the thickness of the fabric to ensure a suitable engraving depth.

[0070] In this embodiment, the environmentally friendly solvent is an environmentally friendly organic solvent or a water-based solvent, which is environmentally friendly, non-toxic, and volatile; it has no adverse effect on the breathability and feel of the fabric; the dissolution process is gentle and does not damage the fabric fiber structure. The environmentally friendly organic solvent can be ethyl acetate, acetone, ethyl lactate, etc., and the environmentally friendly water-based solvent can be a 2% sodium hydroxide aqueous solution. It has the characteristics of being environmentally friendly, non-toxic, and volatile, and can selectively dissolve the intermediate layer material while ensuring the fabric performance and pattern quality.

[0071] Furthermore, the process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to react with the intermediate layer, dissolving the engraved parts and revealing the pattern naturally; the dissolution time is 3-10 minutes, which can be adjusted according to the solvent and fabric material. After dissolving, the fabric can be washed with water or a neutral detergent to remove residual solvent; After washing, air dry or tumble dry at low temperature to ensure the fabric regains its original feel and breathability.

[0072] Example 6 This invention provides a three-layer fabric melting and patterning process, such as... Figure 2 As shown, it includes the following steps: Select a three-layer fabric, including an outer layer, a middle layer, and a bottom layer. Pre-treat the middle layer and then laminate the three layers together. The shape, size, and position of the design pattern can be determined by drawing the pattern using computer-aided design software, and then importing the pattern file into the control system of the laser engraving equipment. The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

[0073] In this embodiment, the outer layer of the three-layer fabric is cotton, the middle layer is cellulose acetate, and the bottom layer is silk.

[0074] Furthermore, the specific method for preprocessing the intermediate layer is as follows: The intermediate layer is treated with a low-temperature plasma device for 1-3 minutes, preferably 2 minutes in this embodiment, with a power of 100-500W, preferably 300W in this embodiment; The plasma-treated intermediate layer is immersed in the composite finishing solution for 10-20 minutes, preferably 15 minutes in this embodiment; The prepared intermediate layer is dried at 50-60°C, preferably 55°C in this embodiment; The composite finishing solution comprises the following raw materials in parts by weight: 10-15 parts of polydimethylsiloxane, 6-12 parts of modified chitosan, 5-10 parts of modified betaine, and 30-40 parts of deionized water. In this embodiment, it may be 12.5 parts of polydimethylsiloxane, 9 parts of modified chitosan, 7.5 parts of modified betaine, and 35 parts of deionized water.

[0075] The modified chitosan is prepared as follows: chitosan with an average molecular weight of 620,000 and a degree of deacetylation of 90-95% is added to a sodium hydroxide solution with a weight of 6-10 times and a concentration of 2-5%, and leached at -15 to -10°C for 20-30 hours. After filtration and drying, an intermediate is obtained. The intermediate is added to a 1% acetic acid solution with a weight of 8-12 times, and treated with a microwave device at 200-400W for 10-20 minutes. The product is precipitated with ethanol, washed, and dried to obtain modified chitosan.

[0076] The modified betaine is prepared as follows: Take 15-20 parts by weight of betaine, 5-10 parts by weight of sodium lignosulfonate and 40-50 parts by weight of deionized water, mix them evenly, add 1-5 parts by weight of polyethylene glycol and stir evenly, react at 50-60℃ for 50-80 min, then precipitate the product with ethanol, wash and dry to obtain modified betaine.

[0077] In practice, the three-layer fabric is laminated using either hot pressing or ultrasonic bonding technology.

[0078] In this embodiment, hot-pressing composite is used: three layers of fabric are placed in a hot-pressing device and bonded together by heating and pressurizing. The hot-pressing parameters (temperature, pressure, time) are adjusted according to the fabric material to ensure that each layer is tightly bonded.

[0079] In this embodiment, the specific steps of using a laser engraving device to engrave the pattern outline on the middle layer of the three-layer fabric are as follows: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

[0080] Preferably, the engraving parameters of the laser engraving equipment include a power of 30W, a speed of 300mm / s, and a focal length that is adjusted according to the thickness of the fabric to ensure a suitable engraving depth.

[0081] In this embodiment, the environmentally friendly solvent is an environmentally friendly organic solvent or a water-based solvent, which is environmentally friendly, non-toxic, and volatile; it has no adverse effect on the breathability and feel of the fabric; the dissolution process is gentle and does not damage the fabric fiber structure. The environmentally friendly organic solvent can be acetone, and the environmentally friendly water-based solvent can be a 1% sodium carbonate aqueous solution. It has the characteristics of being environmentally friendly, non-toxic, and volatile, and can selectively dissolve the intermediate layer material while ensuring the fabric performance and pattern quality.

[0082] Furthermore, the process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to react with the intermediate layer, dissolving the engraved parts and revealing the pattern naturally; the dissolution time is 3 minutes, which can be adjusted according to the solvent and fabric material. After dissolving, the fabric can be washed with water or a neutral detergent to remove residual solvent; After washing, air dry or tumble dry at low temperature to ensure the fabric regains its original feel and breathability.

[0083] Comparative Example 1: The three-layer fabric is the same as that in Example 1, and is obtained using the existing three-layer fabric composite pattern manufacturing process.

[0084] Comparative Example 2: The three-layer fabric is the same as that in Example 2, and is obtained using the existing three-layer fabric composite pattern manufacturing process.

[0085] Comparative Example 3: The three-layer fabric is the same as that in Example 3, and is obtained using the existing three-layer fabric composite pattern manufacturing process.

[0086] Comparative Example 4: The three-layer fabric is the same as that in Example 4, and is obtained using the existing three-layer fabric composite pattern manufacturing process.

[0087] Comparative Example 5: The three-layer fabric is the same as that in Example 5, and is obtained using the existing three-layer fabric composite pattern manufacturing process.

[0088] experiment The performance of the three-layer fabrics obtained in Examples 1-6 and Comparative Examples 1-5 was tested.

[0089] Air permeability test: Use an air permeability tester (such as Textest FX3300) and conduct the test according to the standard GB / T 5453-1997 "Determination of air permeability of textiles".

[0090] Measure the volume of gas passing through a unit area of ​​fabric per unit time (mm³ / s / cm²). Washing test: According to standard GB / T 8629-2017 "Home Washing and Drying Procedures for Textiles", the fabric should be washed multiple times (20 times) using a washing machine.

[0091] After washing, check if the pattern has peeled off, faded, or deformed.

[0092] Image sharpness test: The pattern is photographed using a high-resolution scanner or camera, and the sharpness and contrast of the pattern edges are measured using image analysis software such as ImageJ.

[0093] Calculate the resolution (DPI) and edge sharpness (in pixels) of the pattern. Testing standards: Acceptable: The pattern is clear, the edges are sharp, and there is no color difference.

[0094] Unacceptable: blurry pattern, unclear edges, or color difference ΔE > 2.0.

[0095] The test results are shown in Table 1 below: Table 1. Performance Test Results of Three-Layer Fabric Example 1 337 no qualified Comparative Example 2 198 yes Unqualified Example 2 485 no qualified Comparative Example 2 293 yes Unqualified Example 3 506 no qualified Comparative Example 3 301 yes Unqualified Example 4 386 no qualified Comparative Example 4 228 yes Unqualified Example 5 488 no qualified Comparative Example 5 292 yes Unqualified Example 6 538 no qualified The results above show that the three-layer fabric produced by the three-layer fabric melting and development process provided by the present invention has good breathability, good washability, and smooth lines and clear edges of the laser-engraved pattern.

[0096] It should be noted that, for the sake of simplicity, the foregoing embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to the present invention. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0097] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A three-layer fabric melting and patterning process, characterized in that, Includes the following steps: Select a three-layer fabric, including an outer layer, a middle layer, and a bottom layer, and composite the three layers of fabric. The outer and bottom layers of the three-layer fabric are cotton, silk, or nylon, and the middle layer is cellulose acetate. Design the shape, size, and placement of the pattern; The outline of the pattern is engraved on the middle layer of the three-layer fabric using laser engraving equipment; The engraved area is dissolved using environmentally friendly solvents, allowing the pattern to be revealed naturally.

2. The three-layer fabric melting and patterning process as described in claim 1, characterized in that, The three-layer fabric is laminated by hot pressing or ultrasonic bonding.

3. The three-layer fabric melting and patterning process as described in claim 1, characterized in that, The specific steps of using laser engraving equipment to engrave the pattern outline on the middle layer of the three-layer fabric are as follows: Fix the composite three-layer fabric onto the worktable of the laser engraving equipment; Start the equipment and precisely carve the pattern outline on the intermediate layer according to the preset parameters; After the carving is completed, check the clarity of the pattern and the sharpness of the edges.

4. The three-layer fabric melting and patterning process as described in claim 3, characterized in that, The engraving parameters of the laser engraving equipment include a power of 10-50W and a speed of 100-500mm / s.

5. The three-layer fabric melting and patterning process as described in claim 1, characterized in that, The environmentally friendly solvent is a water-based solvent, and the water-based solvent is an alkaline aqueous solution.

6. The three-layer fabric melting and patterning process as described in claim 5, characterized in that, The process of dissolving the engraved area with an environmentally friendly solvent to naturally reveal the pattern specifically involves: Spray or apply the solvent evenly to the engraved area; Wait for the solvent to dissolve the engraved parts so that the pattern can be revealed naturally. The dissolution time is 3-10 minutes. After dissolving, wash the fabric with clean water or a neutral detergent; After washing, air dry or dry at low temperature.

7. The three-layer fabric melting and patterning process as described in claim 6, characterized in that, Before laminating the three layers of fabric, the middle layer is pretreated. The specific pretreatment method is as follows: The intermediate layer is treated with a low-temperature plasma device for 1-3 minutes at a power of 100-500W; Immerse the plasma-treated intermediate layer in the composite finishing solution for 10-20 minutes; Dry the prepared intermediate layer at 50-60℃; The composite finishing liquid comprises the following raw materials in parts by weight: 10-15 parts of polydimethylsiloxane, 6-12 parts of modified chitosan, 5-10 parts of modified betaine, and 30-40 parts of deionized water.

8. The three-layer fabric melting and patterning process as described in claim 7, characterized in that, The modified chitosan is prepared as follows: chitosan with an average molecular weight of 620,000 and a degree of deacetylation of 90-95% is added to a sodium hydroxide solution with a weight of 6-10 times and a concentration of 2-5%, and leached at -15 to -10℃ for 20-30 hours. After filtration and drying, an intermediate is obtained. The intermediate is added to a 1% acetic acid solution with a weight of 8-12 times, and treated with a microwave device at 200-400W for 10-20 minutes. The product is precipitated with ethanol, washed, and dried to obtain modified chitosan.

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