Gambiered canton gauze composite fabric as well as hot-pressing laminating method and application thereof

Abstract

The invention discloses gambiered canton gauze composite fabric, a hot-pressing laminating method thereof and application of the gambiered canton gauze composite fabric in shoes, shoes, bags and suitcases. The composite fabric comprises a gambiered canton gauze layer, a functional base material layer and a polyurethane hot melt adhesive net film bonding layer located between the gambiered canton gauze layer and the functional base material layer. The activation temperature of the rubber net film is 105-115 DEG C, the hot pressing temperature is 140-155 DEG C, and the specific gravity is 1.10-1.14; the hot-pressing laminating method comprises the steps of laminating, hot-pressing and standing and curing, and preferably adopts a sectional type hot-pressing process. Low-temperature and firm bonding of gambiered canton gauze is achieved through the specific glue net film, the fiber structure and the surface texture of the gambiered canton gauze are effectively protected, and meanwhile the composite fabric is endowed with excellent peel strength and heat resistance. Based on the high elasticity and thermoplasticity of the rubber net film, the composite fabric can be applied to shoe toes, bag bodies and other shoes and luggage products needing three-dimensional curved surface modeling through hot press molding, the technical problem that traditional gambiered canton gauze is difficult to stereoscopically shape is solved, and an effective scheme is provided for innovative application of traditional fabric in the modern fashion industry.

Description

Technical Field

[0001] This invention belongs to the field of textile composite materials technology, specifically relating to a Xiangyun yarn composite fabric and its hot-pressing bonding method and application. Background Technology

[0002] Xiangyun yarn, also known as liangsha, is a traditional Chinese silk fabric, renowned for its unique yam dyeing and river mud treatment processes. It boasts advantages such as a smooth texture, antique colors, and excellent breathability, and is commonly used in high-end clothing and handicrafts. However, Xiangyun yarn itself is relatively soft and loosely structured, making it difficult to use directly when needed for applications requiring a certain degree of stiffness, three-dimensional shaping, or composite with other functional materials. Traditional bonding processes often use solvent-based adhesives or high-temperature hot melt adhesives. The former poses environmental and health risks, while the latter may damage the natural fiber structure and surface texture of Xiangyun yarn due to excessively high activation temperatures, affecting its appearance and feel.

[0003] Polyurethane hot melt adhesive webs, as an environmentally friendly adhesive material, are widely used in the textile composite field due to their solvent-free nature, high bonding strength, and good elasticity. However, conventional hot melt adhesive webs typically have high activation temperatures (e.g., above 130℃), posing a risk of heat damage when directly used for bonding Xiangyun yarn. On the other hand, low-temperature activated adhesive webs often lack sufficient bonding strength or heat resistance, making it difficult to meet the requirements of footwear, bags, and other products for the durability of three-dimensional shapes and the appropriate operating temperature.

[0004] Therefore, how to achieve a firm and flexible bond between Xiangyun yarn and various functional substrates without damaging its unique texture, and make it suitable for footwear, accessories and other fields that require high three-dimensional shaping, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The present invention aims to overcome the technical problems in the prior art where Xiangyun yarn is difficult to bond firmly with functional materials and the bonding process is prone to damaging the properties of the fabric itself. It provides a Xiangyun yarn composite fabric with reasonable structure, firm bonding, gentle process and the ability to achieve three-dimensional molding, as well as its preparation method and application.

[0006] The technical solution adopted by this invention to solve its technical problem is: A composite fabric of Xiangyun yarn, comprising: Xiangyun yarn layer; At least one functional substrate layer; and An adhesive layer located between the Xiangyun yarn layer and the functional substrate layer; The adhesive layer is composed of a polyurethane hot melt adhesive web film, which has an activation temperature of 105°C to 115°C and is bonded to the Xiangyun yarn layer and the functional substrate layer after undergoing a hot pressing process at 140°C to 155°C.

[0007] Preferably, the polyurethane hot melt adhesive mesh is a mesh structure obtained by melt-blowing, with a specific gravity of 1.10-1.14, a solid content of 100%, and a color of white or milky white.

[0008] Preferably, the functional substrate layer is selected from at least one of the following materials: elastic textile fabric, polycarbonate film, polyvinyl chloride film, polyester foam, metal foil or sheet.

[0009] Preferably, the fragrant cloud yarn layer is a silk fabric that has been soaked in yam juice and treated with river mud.

[0010] Preferably, after hot pressing and bonding and standing for 24-48 hours, the interlayer peel strength of the composite fabric is not less than 3.5 N / cm at 25°C, and maintains at least 95% of the original peel strength at 85°C.

[0011] Another technical problem to be solved by the present invention is to provide a hot-pressing bonding method for preparing Xiangyun yarn composite fabric as described in any of the preceding claims, comprising the following steps: S1) Provides a clean, dry Xiangyun yarn layer, a functional substrate layer, and the polyurethane hot melt adhesive web in sheet or roll form; S2) The polyurethane hot melt adhesive web film is placed between the Xiangyun yarn layer and the functional substrate layer to form a prefabricated stack; S3) The prefabricated laminate is placed in a hot press and hot-pressed for 5 to 20 seconds at a temperature of 140°C to 155°C and a pressure of 0.2 MPa to 0.8 MPa, so that the polyurethane hot melt adhesive web melts and penetrates into the surface of the adjacent material. S4) Allow the hot-pressed composite fabric to stand at room temperature for 24 to 48 hours to complete the bonding and curing.

[0012] Preferably, in step (S3), the hot pressing equipment is a flat vulcanizing machine, a continuous rolling press, or a garment ironing machine with temperature control function.

[0013] Preferably, in step (S3), a segmented hot pressing process is used, including: First stage: Pre-compression is carried out at 110℃-120℃ and low pressure to initially activate and position the adhesive web membrane; Second stage: rapidly heat to 140℃-155℃ and apply full pressure for main pressing.

[0014] Another technical problem to be solved by the present invention is to provide an application of the Xiangyun yarn composite fabric as described in any of the above claims in the field of footwear and bags, for making shoe uppers, box surfaces, bags or product parts with three-dimensional shaping requirements.

[0015] Preferably, by utilizing the high elasticity and shape retention of the polyurethane hot melt adhesive film, the Xiangyun yarn layer is formed and maintained in specific three-dimensional curved shapes on parts such as shoe toes and bag bodies through hot pressing and cooling.

[0016] The beneficial effects of this invention are as follows: By selecting a specific polyurethane hot melt adhesive web with a low activation temperature (105-115℃) but high final bonding strength, and combining it with an optimized hot pressing process (140-155℃), high-strength bonding of Xiangyun yarn to various substrates is achieved, while effectively avoiding the damage of high temperature to the Xiangyun yarn fibers and the "oily" texture of the surface. The dry hot pressing bonding method requires no solvent, the process steps are simple, it is suitable for continuous production, and it is environmentally friendly.

[0017] By selecting different functional substrate layers (such as foam, elastic film, etc.), composite fabrics can be flexibly endowed with diverse functions such as cushioning, waterproofing, and stiffening, thus expanding the application scenarios of Xiangyun yarn. By making full use of the thermoplasticity and high elasticity of the glued web film, Xiangyun yarn, which was originally difficult to process in three dimensions, can be made into products such as shoes and bags with stable three-dimensional shapes through hot pressing, opening up new directions for the high added value application of traditional fabrics. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-layer structure of Example 1; Figure 2 This is a schematic diagram of the five-layer structure of Example 3. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0020] Example 1 Traditional Xiangyun yarn, due to its soft and delicate texture, has limited applications in areas requiring cushioning and padding, such as bags and home furnishings. (See also...) Figure 1 As shown, this embodiment provides a composite material that combines the aesthetic value of Xiangyun yarn with cushioning function, which can be widely used in high-end handbag linings, cultural and creative cushions, art decorative screens and other products.

[0021] The preparation method of Xiangyun yarn layer is as follows: Specifications: Made from traditional Xiangyun yarn produced in Shunde, Guangdong, the raw material is 22 momme (approximately 81g / m²) plain crepe satin silk fabric, which is soaked and sun-dried six times in yam juice, and finally surface-treated with specific river mud from the Pearl River Estuary. Pretreatment: Place the Xiangyun yarn fabric in a constant temperature and humidity environment of (25±2)℃ and (65±5)% for 24 hours to equilibrate. Gently wipe the surface with a non-woven cloth soaked in anhydrous ethanol to remove any possible dust and organic impurities, and then air dry naturally. Cutting: Cut the treated Xiangyun yarn into square samples of 300mm×300mm.

[0022] The method for preparing the functional substrate layer is as follows: Select: 3mm thick slow-rebound polyester foam sheet with a density of 35kg / m³, which has good compression deformation recovery rate and low odor characteristics; Pretreatment: Place the foam sheet in an 80℃ oven and dry for 2 hours to remove any moisture that may be absorbed; Cutting: Cut to the same size as Xiangyun yarn.

[0023] The adhesive layer is prepared as follows: Material: HY-W7118 type polyurethane hot melt adhesive film, its main technical parameters are shown in Table 1; Pretreatment: After removing from the sealed packaging, place in a dry environment for 1 hour to allow the temperature and humidity to equalize; Cutting: Cut to 290mm×290mm, slightly smaller than the substrate size, to avoid excess adhesive at the edges during hot pressing.

[0024] Table 1: Main parameters of HY-W7118 polyurethane hot melt adhesive web film The detailed steps of the composite process are as follows: Layered assembly: Place the following layers in sequence on a flat stainless steel workbench: polyester foam layer, HY-W7118 adhesive mesh, and Xiangyun yarn layer (face up); use positioning pins to ensure that the three layers are precisely aligned, with each side misaligned by no more than 1mm.

[0025] The segmented hot pressing process is as follows: Equipment: DYC-400 type programmable flat vulcanizing machine, equipped with two mirror stainless steel heating plates with a size of 400mm×400mm.

[0026] First stage (pre-activation positioning): Set the temperature of the upper and lower heating plates to (115±2)℃; place the stacked assembly in the center of the heating plates, slowly close the mold to a slight contact state, and apply a pressure of (0.10±0.02)MPa; maintain this state for (10±1) seconds, at which point the glue film begins to soften but does not completely melt, which plays a role in initially fixing each layer; Second stage (main pressing): The temperature of the heating plate is raised to (150±2)℃ within 5 seconds; a pressure of (0.50±0.05)MPa is applied and held for (15±1) seconds; in this stage, the glue web film is completely melted and penetrates to the back of Xiangyun yarn and the surface of foam under pressure.

[0027] Cooling and demolding: After the pressure holding period, keep the pressure constant, turn on the water cooling system, and cool the heating plate to below 60°C within 60 seconds; open the mold and remove the composite fabric. Post-treatment: Place the hot-pressed composite fabric flat in a clean environment with a temperature of (25±2)℃ and a relative humidity of (50±10)%; let it stand for (36±2) hours to allow the adhesive layer to fully cure and crystallize, achieving the best bonding state.

[0028] The mechanical property test results are as follows: Peel strength: Five specimens, each 25 mm wide and 200 mm long, were cut according to GB / T 2791-1995 standard. A 180° peel test was performed on an INSTRON 3365 universal testing machine at a crosshead speed of 100 mm / min. The average peel strength was calculated to be (4.2 ± 0.3) N / cm.

[0029] Heat retention rate: After the sample was placed in an oven at (85±2)℃ for 24 hours, the peel strength was immediately tested and found to be (3.9±0.2) N / cm, with a retention rate of (92.9±2.5)%.

[0030] Appearance and feel evaluation: A five-member expert evaluation panel was formed, consisting of two textile engineers, two arts and crafts masters, and one fabric procurement expert.

[0031] A double-blind method was used to compare the original Xiangyun yarn with the composite material of this embodiment. The composite material was scored from four dimensions: color, gloss, softness, and surface smoothness (1-10 points, with 10 being the best). The results are shown in Table 2. Table 2: Expert Evaluation Results on Appearance and Feel Microstructure analysis: The cross-section of the composite material was observed using a Hitachi S-4800 scanning electron microscope.

[0032] The results showed that the thickness of the glue web film was uniform, approximately (45±5) μm; the colloid had penetrated into the gaps between the Xiangyun yarn fibers and the pores on the surface of the foam, forming a strong mechanical interlocking structure.

[0033] The composite material prepared in this embodiment was used to make a Chinese-style cushion: two 300mm×300mm pieces of composite fabric were cut with the Xiangyun yarn side facing out; three sides were sewn together, leaving one side open; a mixture of 90% goose down and 10% PP cotton filling was filled; the opening was sewn together; the finished cushion not only retains the unique color and texture of Xiangyun yarn, but also has good support and resilience, and the surface is smooth and wrinkle-free, which is significantly better than the traditional process of directly wrapping the filling with Xiangyun yarn.

[0034] Example 2 Traditional Xiangyun yarn, due to its loosely interwoven warp and weft yarn structure, is difficult to shape in areas requiring complex three-dimensional forms, such as the toe box. Furthermore, conventional hot melt adhesives can damage the fabric upon high-temperature activation. This embodiment utilizes the excellent elasticity and thermoplasticity of a specific polyurethane hot melt adhesive web to achieve an innovative application of Xiangyun yarn in footwear products.

[0035] The substrate selection is as follows: Xiangyun yarn layer: Lightweight Xiangyun yarn with a weight of about 65g / m² is selected, and the color is classic ochre. Functional layer: 0.5mm thick double-sided elastic knitted fabric, composed of 92% nylon + 8% spandex, with warp elasticity ≥40%; Referring to the process in Example 1, Xiangyun yarn and elastic knitted fabric are laminated together using HY-W7118 adhesive web film.

[0036] Key process adjustments: The hot pressing temperature was adjusted to (145±2)℃, the pressure to (0.35±0.05)MPa, and the time to (10±1) seconds, resulting in an elastic composite fabric with a thickness of approximately 0.68mm.

[0037] 3D Molding Mold Design and Fabrication Toe design: This is a women's low-cut high heel with an asymmetrical curved toe area, with a maximum curvature radius of 15mm and a minimum curvature radius of 3mm.

[0038] Mold making: Positive mold: CNC machined from 7075 aviation aluminum alloy, with hard anodized surface, achieving a hardness of HV400 or higher; Negative mold: Cast from solid silicone that can withstand temperatures up to 250℃, with a Shore hardness of A60; The mold design features a 5mm wide pressing edge area on the edge of the negative mold to ensure that the fabric is completely clamped during the molding process.

[0039] The three-dimensional hot pressing process is as follows: Fabric pretreatment: Cut the composite fabric into an oval shape that is approximately 30% larger than the projected area of ​​the toe; mark the center point and main positioning lines on the back of the fabric (elastic side) with a disappearing pen.

[0040] Molding parameter optimization: Determine the optimal process window through preliminary experiments: Temperature range: 140-155℃; Pressure range: 0.2-0.6MPa; Time range: 20-35 seconds.

[0041] Final selected parameters: temperature (145±2)℃, pressure (0.30±0.02)MPa, time (25±2) seconds.

[0042] The molding process steps are as follows: Preheat the silicone female mold to 80℃; Lay the composite fabric (with the Xiangyun yarn side facing out) flat on the positive mold and align it with the positioning marks; Carefully fit the preheated female mold together, ensuring that the edges of the fabric are completely inside the pressing area; Place the entire set of molds onto the worktable of the YH-100 hydraulic press; Set the process parameters and start the machine; the equipment will automatically complete the heating, pressurizing, pressure holding, and cooling processes. After cooling to below 60°C, manually demold.

[0043] Molding quality assessment: The molded toe component was scanned using the ATOS III Triple Scan 3D scanning system. Compared with the design CAD model, the maximum deviation was 0.35mm, and the average deviation was 0.12mm, meeting the ±0.5mm accuracy requirement of the footwear industry. Under D65 standard light source, the Xiangyun yarn surface showed no bright spots, indentations, or color differences. Surface roughness was measured, and the Ra values ​​of the Xiangyun yarn surface before and after molding were 1.68μm and 1.72μm, respectively, with no significant changes. The molded toe component was installed on a simulated foot shape and subjected to 50,000 bending fatigue tests (simulating normal walking). Post-test inspection revealed no delamination, no cracks on the Xiangyun yarn surface, and no visible failures in the glued areas.

[0044] Footwear making: The pre-formed Xiangyun yarn toe piece is sewn together with the same color calfskin upper; Goodyear welt construction is used to combine it with the rubber sole.

[0045] Thirty pairs of test shoes were made and the target consumer group (women aged 30-50 who value cultural taste) were invited to try them on. Three months later, a follow-up survey was conducted, and the satisfaction survey results were as follows: unique appearance: 9.5 / 10, wearing comfort: 8.8 / 10, durability: 9.2 / 10, overall rating: 9.3 / 10.

[0046] Example 3 While traditional Xiangyun yarn possesses natural waterproof properties, it cannot meet the high requirements of modern outdoor clothing for waterproofness and breathability. (See also...) Figure 2 As shown, this embodiment uses an innovative three-layer composite structure to perfectly combine the traditional beauty of Xiangyun yarn with modern waterproof technology.

[0047] Surface layer (outer layer): Material: dark gray Xiangyun yarn, weight 70g / m²; Functional requirements: to provide a traditional aesthetic appearance while serving as a protective layer for the waterproof membrane. Intermediate layer (functional layer): Material: hydrophilic TPU film, thickness 0.08mm; Key parameters: hydrostatic pressure ≥10000Pa, moisture permeability ≥8000g / m²·24h; Function: Provides core waterproof and breathable functions.

[0048] Inner layer (comfort layer): Material: superfine nylon stretch knit fabric, weight 110g / m²; Composition: 85% nylon + 15% spandex; Function: Provides wearing comfort and moderate elasticity.

[0049] Adhesive layer: Material: HY-W7118 polyurethane hot melt adhesive mesh, two layers; Special requirements: good adhesion to TPU film without affecting its moisture permeability.

[0050] The two-step composite process is as follows: Step 1: Laminating Xiangyun yarn with TPU film Layering order: Xiangyun yarn (face down) - glued mesh film - TPU film (smooth side up); Process parameters: temperature (145±2)℃, pressure (0.40±0.03)MPa, time (12±1) seconds; Quality control points: The TPU film surface is wrinkle-free and the adhesive layer is evenly distributed.

[0051] Intermediate treatment: After the first step of lamination, place the semi-finished product at room temperature for 2 hours to allow the adhesive layer to initially cure; Check the lamination quality: Conduct a small-area peel test to ensure good adhesion; Step 2: Laminating the TPU film with the elastic fabric Layering sequence: Step 1 semi-finished product (TPU side up) - adhesive web film - elastic fabric (right side down); Process parameters: exactly the same as Step 1; Key control: Ensure consistent temperature and pressure during the two hot presses to avoid uneven heating of the TPU film. Final post-treatment: After lamination, stand for 48 hours in an environment of (23±2)℃ and (50±5)% relative humidity; perform dimensional stability treatment: heat treatment at 80℃ for 5 minutes to eliminate internal stress; Performance test results Basic physical properties: Total thickness: 0.52±0.03mm; Areal density: 285±10g / m²; Warp tensile strength: 128±8N; Weft tensile strength: 105±6N.

[0052] Waterproof and breathable performance: Hydrostatic pressure test (GB / T 4744-2013): Initial value: 8500±300Pa; after 5 washes: 8200±350Pa; after 10 washes: 8000±400Pa; Moisture permeability test (GB / T 12704.1-2009, Method B): Initial value: 7800±250g / m²·24h; after 10 washes: 7500±300g / m²·24h.

[0053] Washability test: According to GB / T 8629-2017 standard, 5A program, 40℃ water temperature; after 10 washes: no delamination, no foaming, no obvious change in color fastness; peel strength retention rate: 92%.

[0054] Actual wearing test: 10 vest samples were made, and 10 testers were recruited to spend 1 hour outdoors in light to moderate rain (5-10 mm / h).

[0055] Results: All participants' inner clothing remained dry, and their overall comfort rating was 8.5 / 10. Example 4 The high-end handbag manufacturing industry often faces the challenge of three-dimensional molding of natural materials. This embodiment provides a complete three-dimensional molding solution for Xiangyun yarn composite materials, meeting the dual requirements of the luxury goods industry for material uniqueness and process precision.

[0056] Structural Design: Top Layer: Xiangyun yarn (black, 85g / m²); Middle Layer: HY-W7118 adhesive web (45g / m²); Bottom Layer: 2mm thick high-density polyester foam (density 45kg / m³) Key points of the composite process: The basic process of Example 1 is adopted, but the process is adjusted according to the thickness of the foam: the pressure is increased to 0.6MPa; the time is extended to 20 seconds; the cooling time is extended to 90 seconds; a homogeneous composite material with a thickness of about 2.25mm is obtained.

[0057] Handbag style: Classic tote bag style; bag dimensions: 300mm×220mm×80mm; features: 5mm deep reinforcing ribs at the bottom and curved transitions on the sides.

[0058] Mold design key points: Male mold: S136 mold steel, hardness HRC48-52, surface mirror polished (Ra≤0.1μm); Female mold: high temperature resistant silicone (long-term operating temperature 180℃), Shore hardness A70; Blanket width: 8mm, with a 3° draft angle.

[0059] Venting system: Venting grooves with a depth of 0.1mm are set at the highest point of the female mold surface; Temperature control system: The mold has a built-in three-zone independent temperature control system; the temperature of the upper, middle and lower zones can be controlled separately; temperature control accuracy: ±1℃.

[0060] The multi-stage hot pressing process is as follows: First stage: preheating and positioning (parameters shown in Table 3); Second stage: high-temperature molding; Third stage: pressure holding and cooling.

[0061] Table 3: Multi-stage hot pressing process parameters Comprehensive evaluation of molding quality Dimensional stability test: The molded part was placed in a standard environment (23℃ / 50%RH) for 7 days; key dimensions (length, width, height, diagonal) were measured daily; results: the maximum dimensional change was 0.8mm (0.27%), which is far below the industry standard of 3%.

[0062] Surface quality analysis: Observed using a Keyence VHX-7000 ultra-depth-of-field 3D microscope; key areas of focus: curved transitions and edges of reinforcing ribs; results: Xiangyun yarn fibers remained intact during the forming process without any breakage.

[0063] Mechanical performance test: Simulated use test: Filled with a 2kg weight, lifted 50 times a day for 30 consecutive days; Post-test inspection: No delamination, no permanent deformation, foam resilience >95%.

[0064] Environmental adaptability: High temperature and high humidity test: placed in a 40℃ / 90%RH environment for 7 days; Low temperature test: placed in a -10℃ environment for 24 hours; Results: Dimensional changes were all within the allowable range, and there was no delamination.

[0065] Small-batch trial production: Production quantity: 200 pieces; Production cycle time: 68 seconds per piece; Yield rate: 98.5%.

[0066] Compared with traditional processes: Traditional manual bonding: 45-60 minutes per piece, relies on the technician's experience, and has poor consistency; The process in this embodiment: 68 seconds per piece, fully automated, and has high consistency; Overall efficiency improvement: approximately 40 times.

[0067] Market response: Sales data within 3 months of product launch: Total sales: 185 units, Customer satisfaction: 9.4 / 10, Repurchase intention: 87%.

[0068] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A composite fabric made of Xiangyun yarn, characterized in that, include: Xiangyun yarn layer; At least one functional substrate layer; as well as An adhesive layer located between the Xiangyun yarn layer and the functional substrate layer; The adhesive layer is composed of a polyurethane hot melt adhesive web film, which has an activation temperature of 105°C to 115°C and is bonded to the Xiangyun yarn layer and the functional substrate layer after undergoing a hot pressing process at 140°C to 155°C.

2. The Xiangyun yarn composite fabric according to claim 1, characterized in that, The polyurethane hot melt adhesive mesh is a mesh structure obtained by melt-blowing, with a specific gravity of 1.10-1.14, a solid content of 100%, and a color of white or milky white.

3. The Xiangyun yarn composite fabric according to claim 1 or 2, characterized in that, The functional substrate layer is selected from at least one of the following materials: elastic textile fabric, polycarbonate film, polyvinyl chloride film, polyester foam, metal foil or sheet.

4. The Xiangyun yarn composite fabric according to claim 1, characterized in that, The Xiangyun yarn layer is a silk fabric that has been soaked in yam juice and treated with river mud.

5. The Xiangyun yarn composite fabric according to claim 1, characterized in that, After hot-pressing and standing for 24-48 hours, the interlayer peel strength of the composite fabric is not less than 3.5 N / cm at 25°C, and maintains at least 95% of the original peel strength at 85°C.

6. A hot-pressing bonding method for preparing the Xiangyun yarn composite fabric as described in any one of claims 1-5, characterized in that, Includes the following steps: S1) Provides a clean, dry Xiangyun yarn layer, a functional substrate layer, and the polyurethane hot melt adhesive web in sheet or roll form; S2) The polyurethane hot melt adhesive web film is placed between the Xiangyun yarn layer and the functional substrate layer to form a prefabricated stack; S3) The prefabricated laminate is placed in a hot press and hot-pressed for 5 to 20 seconds at a temperature of 140°C to 155°C and a pressure of 0.2 MPa to 0.8 MPa, so that the polyurethane hot melt adhesive web melts and penetrates into the surface of the adjacent material. S4) Allow the hot-pressed composite fabric to stand at room temperature for 24 to 48 hours to complete the bonding and curing.

7. The hot-pressing bonding method according to claim 6, characterized in that, In step (S3), the hot pressing equipment is a flat vulcanizing machine, a continuous rolling press, or a garment pressing machine with temperature control function.

8. The hot-pressing bonding method according to claim 6, characterized in that, In step (S3), a segmented hot pressing process is adopted, including: First stage: Pre-compression is carried out at 110℃-120℃ and low pressure to initially activate and position the adhesive web membrane; Second stage: rapidly heat to 140℃-155℃ and apply full pressure for main pressing.

9. The application of the Xiangyun yarn composite fabric as described in any one of claims 1-5 in the field of footwear and bags, characterized in that, Used for making shoe uppers, box surfaces, bags, or parts of products requiring three-dimensional shaping.

10. The application according to claim 9, characterized in that, By utilizing the high elasticity and shape retention of the polyurethane hot melt adhesive film, the Xiangyun yarn layer is formed and maintained in specific three-dimensional curved shapes on parts such as shoe toes and bag bodies through hot pressing and cooling.

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