Cloth sewing method and cloth product

Abstract

According to the cloth sewing method and the cloth product, an adhesive structure is preset in a target area and is fused and permeated through ultrasonic energy, and a firm bonding interface is formed between cloth fibers and on the surface of the cloth fibers. Compared with the prior art, the sewing method can obtain high-strength joint even for cloth which is difficult to melt by ultrasonic waves, the problem that traditional ultrasonic sewing is insufficient in fastness is effectively solved, dependence on the hot melting characteristic of cloth fibers is reduced, and the sewing efficiency is improved. The ultrasonic sewing technology can be stably and reliably applied to wider cloth materials including various natural fibers and high-performance fiber fabrics. According to the cloth product manufactured through the method, the tensile strength of the seam is remarkably improved, the seam is flat and smooth, and no obvious colloid accumulation or seepage trace exists.

Description

Technical Field

[0001] This application relates to the field of garment manufacturing technology, and in particular to a fabric sewing method and fabric products. Background Technology

[0002] In the textile manufacturing industry, including clothing, footwear, and bags, it is often necessary to join two or more pieces of fabric together. Ultrasonic cutting and bonding technology, as a modern sewing process, has been widely adopted. Its working principle involves using an ultrasonic generator to produce high-frequency vibration energy, which is transmitted to a welding head or roller via a transducer. When the tool head acts on the laminated fabric, the high-frequency vibration causes the fibers at the contact surface to rapidly melt due to frictional heat. Under pressure, they then interpenetrate, cool, and solidify, thus achieving a strong weld.

[0003] However, the effectiveness of ultrasonic bonding heavily depends on the thermal melting characteristics of the fabric fibers themselves. For fabrics mainly made of natural fibers (such as cotton and linen) or certain high-melting-point chemical fibers (such as some polyester and nylon), under conventional ultrasonic process parameters, the fibers are often difficult to fully melt, or the melted fibers have low viscosity and poor fluidity, resulting in insufficient bonding strength at the bonding area (bonding), and the product is prone to delamination and tearing during use. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, this application provides a fabric sewing method and fabric product, which enables the bonding of fabrics that are not easy to heat melt, and broadens the scope of application of the process to fabric materials.

[0005] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a fabric sewing method, comprising the following steps: obtaining a material to be processed, the material to be processed comprising multiple layers of fabric stacked together, and attaching an adhesive structure at a target area of ​​at least one layer of fabric, the target area being an area of ​​the fabric that can be connected to other fabrics; Ultrasonic waves are applied to the target area, and under the action of ultrasonic energy, the adhesive structure melts and penetrates between each pair of adjacent fabric layers to bond the at least two fabric layers together.

[0006] Using the aforementioned techniques, an adhesive structure is pre-attached to the target area of ​​at least one layer of fabric. Under ultrasonic action, this structure melts and penetrates into the fiber gaps of adjacent fabrics. This allows for high-strength and reliable bonding even for fabrics that are difficult to directly melt and bond with ultrasonic energy, thanks to the aid of adhesives. This fundamentally solves the technical bottleneck of traditional ultrasonic sewing processes, which rely too heavily on the heat-melting properties of fabric materials. It significantly improves bonding strength and peel strength, broadening the application range of ultrasonic sewing technology.

[0007] In one possible implementation, obtaining the material to be processed includes: Multiple layers of fabric are stacked together, and the adhesive structure is bonded to the target area of ​​the target fabric after the target fabric is stacked. Alternatively, the adhesive structure can be bonded to the target area of ​​the target fabric, and multiple layers of fabric can be stacked together. The target fabric is the fabric that needs to be bonded to the adhesive structure.

[0008] The aforementioned technical means allow the adhesive structure to be bonded either before or after fabric stacking, providing two optional process paths. This feature enhances the flexibility of the production process. For different product structures or production line layouts, the most convenient and efficient process sequence can be selected, adapting to the different needs of small-batch customization and large-scale continuous production, thus improving the versatility of the process and production efficiency.

[0009] In one possible implementation, the method further includes: After performing the step of attaching the adhesive structure to the target area of ​​the target fabric, the adhesive structure is hot-pressed to fix it, thereby pre-fixing the adhesive structure to the target fabric.

[0010] By employing the aforementioned technical means, pre-fixing can prevent the adhesive from shifting, falling off, or wrinkling during handling, alignment, or entry into the ultrasonic equipment, thereby ensuring the accuracy and consistency of the final bonding position, reducing the defect rate, and improving the stability of the process and product quality.

[0011] In one possible implementation, applying ultrasonic waves to the target area includes: applying ultrasonic waves to the adhesive structure along the extension direction of the target area, and simultaneously cutting the location where the ultrasonic waves are applied.

[0012] By employing the aforementioned techniques, ultrasonic bonding and edge cutting are performed simultaneously, achieving integrated and efficient processing. This step not only ensures strong adhesion of the fabric but also completes the cutting and sealing of the seam edges in one go, resulting in a smooth, burr-free, and aesthetically pleasing seam. This eliminates the need for subsequent separate cutting processes, significantly improving production efficiency and ensuring a perfect correspondence between the cut edges and the bonding area, thereby enhancing the overall quality and aesthetics of the product.

[0013] In one possible implementation, the adhesive structure includes a first side and a second side, both of which are adhesive, and the second side is covered with release paper. The target fabric includes the topmost layer of fabric after being stacked, and the step of attaching the adhesive structure to the target area of ​​the target fabric includes: attaching the first side of the adhesive structure to the side of the topmost fabric that is away from the next layer of fabric. Applying ultrasonic waves to the target area includes applying ultrasonic waves from one side of the release paper to the target area.

[0014] By employing the aforementioned technical methods, a double-sided adhesive structure with one side adhered to the fabric and the other covered with release paper, and applying ultrasonic waves from the release paper side, a key technical effect is achieved: effectively preventing the molten adhesive from sticking to the tool head (welding head) of the ultrasonic equipment. The release paper, acting as an insulating medium, ensures the continuity and smoothness of the production process, reduces downtime caused by tool head cleaning, and is particularly suitable for automated, large-scale assembly line production, improving equipment utilization and production efficiency.

[0015] In one possible implementation, the target fabric includes the fabric that is the topmost layer after being stacked and / or the fabric that is the bottommost layer and / or the fabric that is the middle layer.

[0016] Through the aforementioned technical means, the adhesive structure can be bonded to any position (top layer, bottom layer, or middle layer) in a multilayered fabric, greatly enhancing the flexibility and applicability of the process design. This allows the present invention to address the complex stitching needs of multilayered composite materials, placing the adhesive structure at the most effective interface according to the characteristics, functional requirements, or appearance design of different fabrics, thus providing excellent support for diverse product structures.

[0017] In one possible implementation, the adhesive structure is a continuous strip, a discontinuous dot, or a line.

[0018] Using the aforementioned techniques, the adhesive structure can be continuous strips, discontinuous dots, or lines, allowing for flexible selection of the adhesive distribution pattern. For example, continuous strips provide maximum strength, dots ensure bonding while maintaining localized air permeability, and lines allow for finer bond control. This enhances the process's adjustability to the final product's functionality.

[0019] In one possible implementation, the width of the adhesive structure is not greater than the width of the target area.

[0020] The aforementioned technical methods ensure the precision of the bonding process and the aesthetics of the final joint. They prevent excessive adhesive from overflowing into non-bonding areas, guaranteeing that the bonding process is precisely confined within the designed joint area.

[0021] In one possible implementation, the width of the adhesive structure ranges from 0.1cm to 1.5cm, and the thickness ranges from 0.05mm to 0.3mm.

[0022] By employing the aforementioned technical methods, the dimensions of the adhesive structure are optimally limited to a width of 0.1cm to 1.5cm and a thickness of 0.05mm to 0.3mm. This achieves an ideal balance between adhesive strength and the product's aesthetics and feel. Adhesives within this range provide sufficient effective bonding components to ensure a strong bond, while their thinness prevents the formation of noticeable hard protrusions at the seams, thus maximizing the preservation of the fabric's original softness and performance.

[0023] In one possible implementation, the fabric is made of a material that cannot be melted by ultrasonic energy to achieve adhesion.

[0024] Through the above-mentioned technical means, for materials that cannot be melted and bonded by ultrasonic energy, such as fabrics containing a high proportion of natural fibers such as cotton and linen or special functional coatings, the adhesive structure provided by this invention can effectively achieve stable interlayer bonding.

[0025] In a second aspect, this application also provides a fabric article, which is a fabric article obtained by the fabric sewing method of any of the above embodiments.

[0026] The beneficial effects of this application are as follows: This application provides a fabric sewing method and fabric product, which pre-places an adhesive structure in the target area and uses ultrasonic energy to melt and penetrate it, forming a strong adhesive interface between and on the surface of the fabric fibers. Compared with related technologies, the sewing method of this application can achieve high-strength bonding even for fabrics that are difficult to melt by ultrasonic waves, effectively solving the problem of insufficient strength of traditional ultrasonic sewing, reducing the dependence on the thermal melting characteristics of fabric fibers, and enabling ultrasonic sewing technology to be stably and reliably applied to a wider range of fabric materials, including various natural fibers and high-performance fiber fabrics. Fabric products made using this method have significantly improved tensile strength at the seams, and the seams are smooth and flat, without obvious glue accumulation or seepage marks. Attached Figure Description

[0027] Figure 1 One of the flowcharts of a fabric sewing method according to this application is shown; Figure 2 A second schematic flowchart of a fabric sewing method according to this application is shown; Figure 3 One of the structural schematic diagrams of a fabric sewing method according to this application is shown. Detailed Implementation

[0028] In this application, the terms "set up," "equipped with," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0029] The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0031] This application provides a fabric sewing method, see below. Figure 1 The fabric sewing method includes the following steps: S10: Obtain the material to be processed.

[0032] The material to be processed includes at least two layers of fabric stacked together, with an adhesive structure bonded to a target area of ​​at least one layer of fabric. The target area is typically the edge of the fabric used for bonding with other fabric layers. The adhesive structure can be made of hot-melt double-sided adhesive or similar materials, and the width of the adhesive structure should not exceed the width of the target area.

[0033] S20. Apply ultrasonic waves to the target area. Under the action of ultrasonic energy, the adhesive structure melts and penetrates between each pair of adjacent fabric layers to bond at least two fabric layers.

[0034] It is understood that the fabric can be a molten material that melts itself through ultrasonic energy to form an adhesive, thus the method of this application can further improve the bonding strength between the fabrics; the fabric can also be made of a material that cannot be melted by ultrasonic energy or can only be partially melted, such as fabrics made of natural fibers (such as pure cotton, linen, polyester fibers) or certain chemical fibers (such as high melting point polyester). For such fabrics, this application achieves effective bonding through an adhesive structure, ensuring that the adhesive fully penetrates into the fabric layers under the action of ultrasound to form a uniform and firm bonding area.

[0035] Compared to related technologies, the sewing method of this application can achieve high-strength bonding even for fabrics that are difficult to melt by ultrasound. It effectively solves the problem of insufficient strength of traditional ultrasonic sewing, reduces the dependence on the thermal melting characteristics of fabric fibers, and enables ultrasonic sewing technology to be stably and reliably applied to a wider range of fabric materials, including various natural fibers and high-performance fiber fabrics.

[0036] In one embodiment, step S10, obtaining the material to be processed, includes: stacking multiple layers of fabric together, and after the target fabric is stacked, attaching an adhesive structure to the target area of ​​the target fabric.

[0037] Specifically, multiple layers of fabric can be laid flat and positioned according to a preset stacking order. During the stacking process, adhesive structures are then attached to the target area of ​​the target fabric. For example, assuming there are five layers of fabric, and the third and fourth layers are selected as the target fabrics, adhesive structures can be attached to the target area of ​​the third layer after stacking the first to third layers. Then, the fourth layer is stacked, and adhesive structures are attached to the target area of ​​the fourth layer. Finally, the fifth layer is stacked.

[0038] In another embodiment, step S10, obtaining the material to be processed, includes: attaching an adhesive structure to a target area of ​​the target fabric and stacking multiple layers of fabric together.

[0039] Specifically, an adhesive structure can be first applied to the target area of ​​a single layer of target fabric, and then the layers of fabric can be stacked one by one in a preset order. This method is beneficial for precise control of the adhesive position. For example, assuming there are five layers of fabric, and the third and fourth layers are selected as the target fabric, the adhesive structure can be applied to the target area of ​​the third and fourth layers of fabric first, and then the five layers of fabric can be stacked together.

[0040] It should be noted that the adhesive structure is applied to the target area, which can be applied to any surface of the fabric corresponding to the target area.

[0041] It should be noted that the target fabric is the fabric that needs to be bonded to the adhesive structure. Assuming there are five layers of fabric, and the third and fourth layers are chosen to bond to the adhesive structure, then the third and fourth layers are the target fabric.

[0042] In one embodiment, the target fabric can be the fabric that is on top of the stack. For example, prepare two fabrics, fabric A and fabric B, place fabric A on the top layer and fabric B on the bottom layer. At this time, the target fabric is fabric A, and the adhesive structure is attached to the target area of ​​fabric A.

[0043] In one embodiment, the target fabric may also be the fabric at the bottom layer after being stacked. For example, when fabric B is placed at the bottom layer, the adhesive structure adheres to the target area of ​​fabric B.

[0044] In one embodiment, the target fabric can also be a fabric located in the middle layer. For example, three fabrics are prepared as fabric A, fabric B and fabric C, and they are stacked in a top-to-bottom order. If the target fabric is fabric B, then an adhesive structure is attached to the surface of the target area of ​​fabric B.

[0045] It is understandable that the target fabric can be one piece or multiple pieces. When the target fabric is multiple pieces: as mentioned earlier, adhesive structures can be applied separately to the target areas of each target fabric, and then stacked in a preset order. Alternatively, adhesive structures can be applied separately to the target areas of each target fabric during the stacking process. In this way, synergistic enhancement of adhesion between multiple interfaces is achieved, further improving the bonding strength and reliability.

[0046] In one embodiment, the adhesive structure can be a continuous strip to provide maximum strength, and is continuously distributed along the fabric seam direction to ensure uniform melting when ultrasonic energy is applied, forming a complete adhesive tape.

[0047] In one embodiment, the adhesive structure can be discontinuous dot-like, arranged in rows and columns in the target area. The dot-like adhesive partially melts under the action of ultrasound, forming multiple high-strength bonding points, effectively dispersing stress and improving joint toughness.

[0048] In one embodiment, the adhesive structure can be linear, which can be precisely sprayed onto the target area by a nozzle to form linear adhesive. It is suitable for complex joint paths, has high adaptability and processing flexibility, and the spray line width and thickness are adjustable to achieve lightweight bonding.

[0049] In one embodiment, the width of the adhesive structure is no greater than the width of the target area to avoid adhesive overflow affecting the appearance and performance, while ensuring that energy is concentrated on the effective bonding area during the melting process, thereby improving welding efficiency and quality stability.

[0050] In one embodiment, the width of the adhesive structure ranges from 0.1cm to 1.5cm, and the thickness ranges from 0.05mm to 0.3mm. This size range balances adhesive strength and material saving, facilitates melting and penetration during ultrasonic welding to form a dense bonding interface, and avoids uneven curing or residual stress concentration caused by excessive adhesive layer thickness, thereby ensuring the reliability and durability of the joint area for long-term service. For example, the adhesive structure can have a width of 0.5cm and a thickness of 0.15mm, or a width of 1cm and a thickness of 0.2mm, etc.

[0051] In one embodiment, the adhesive structure may include a first side and a second side, both of which are adhesive, with the second side covered with release paper. This adhesive structure can be applied to any layer of fabric: when the target fabric is a middle layer, it can be applied to either the upper or lower surface of the target fabric, and the release paper can be removed to adhere to fabric stacked adjacent to the target fabric; when the target fabric is the bottom layer, if it is applied to the side of the target fabric facing the upper layer, the release paper is removed; if it is applied to the side of the target fabric away from the upper layer, the release paper is retained; when the target fabric is the top layer, if it is applied to the side of the target fabric facing the lower layer, the release paper is removed; if it is applied to the side of the target fabric away from the lower layer, the release paper is retained.

[0052] In one embodiment, the target fabric includes the topmost layer of fabric after being stacked. Applying an adhesive structure to a target area of ​​the target fabric includes: attaching a first side of the adhesive structure to the side of the topmost fabric facing away from the next layer of fabric; Accordingly, ultrasonic waves are applied to the target area, including: applying ultrasonic waves from the release paper side to the target area. Specifically, for example, after stacking multiple layers of fabric, fabric A is located on the top layer. Fabric A is the target fabric. The first side of the adhesive structure is adhered to the side of fabric A facing away from the next layer, with the release paper facing outwards. When applying ultrasound, the ultrasonic head penetrates the release paper from one side and acts on the adhesive structure, causing the adhesive to melt and penetrate downwards to the interfaces between the multiple fabric layers, achieving a strong interlayer bond. After bonding, the release paper is removed to prevent residual impurities from affecting the feel and appearance. This method effectively avoids direct contact between the adhesive structure and the ultrasonic head, preventing contamination or adhesion, while ensuring that the ultrasonic tool head can accurately act on the adhesive structure, avoiding heat melting or cutting deviation, and improving process stability and product consistency.

[0053] It should be noted that the release paper can be a silicone-coated release paper with heat resistance and isolation properties.

[0054] In one embodiment, the method further includes: after the step of attaching the adhesive structure to the target area of ​​the target fabric, hot-pressing the adhesive structure to pre-fix the adhesive structure to the target fabric.

[0055] Specifically, an iron, hot press roller, or other heating device can be used to press and heat the adhesive structure, so that it initially adheres to the fabric surface, ensuring that its position is fixed during subsequent processing.

[0056] In one embodiment, applying ultrasonic waves to a target area includes applying ultrasonic waves to an adhesive structure along the extension direction of the target area and simultaneously cutting the location where the ultrasonic waves are applied.

[0057] Specifically, a roller-type ultrasonic sewing machine or ultrasonic welding equipment can be used to apply ultrasonic waves to the target area, while simultaneously cutting the parts with adhesive structures, thus achieving integrated bonding and cutting operations, significantly improving processing efficiency and sewing accuracy.

[0058] It should be noted that the adhesive structure described above can be any adhesive material that can be activated and melted by ultrasonic energy.

[0059] The above method will be described in detail below with reference to specific embodiments. In the following embodiments, a roller ultrasonic sewing machine is selected as the processing equipment.

[0060] In one embodiment, the method includes: S101. Prepare multiple pieces of fabric (e.g., fabric A and fabric B).

[0061] S102. Determine the target fabric, for example, take fabric A as the target fabric.

[0062] Understandably, the target fabric can be the top layer, the bottom layer, or the middle layer. The target component can be a single piece of fabric (e.g., one of fabric A and fabric B is the target fabric) or multiple pieces of fabric (e.g., both fabric A and fabric B are target fabrics).

[0063] S103. Stack multiple pieces of fabric together and attach an adhesive structure to the target area of ​​the target fabric (fabric A).

[0064] The specific operation of attaching the adhesive structure to the target area of ​​the target fabric is as follows: If fabric A is stacked on top of fabric B, the adhesive structure is preferentially attached to the side of fabric A away from fabric B; if fabric A is stacked below fabric B, the adhesive structure can be attached to either the side of fabric A facing fabric B or the side of fabric A away from fabric B. When the adhesive structure is attached to the side of the target fabric away from the other fabric, the first side of the adhesive structure adheres to the target fabric, while the second side remains covered with release paper. When the adhesive structure is attached to the side of the target fabric facing the other fabric, the release paper can be removed from the second side, allowing direct contact with the adjacent fabric.

[0065] Understandably, one can first pre-attach the adhesive structure to the target area of ​​the target fabric, and then stack and position multiple pieces of fabric; alternatively, one can first align and stack multiple pieces of fabric, and then attach the adhesive structure to the target area after each stack of the target fabric. Regardless of the order, it is essential to ensure that the width of the adhesive structure does not exceed the target area.

[0066] S104. After attaching the adhesive structure to the target area of ​​the target fabric, heat-press the adhesive structure to fix it, so that the adhesive structure is pre-fixed to the target fabric.

[0067] In this process, after the adhesive structure is attached to the target fabric, an iron, hot roller, or other heating device is used to press and heat the adhesive structure to make it initially adhere to the fabric surface, ensuring that its position is fixed during subsequent processing.

[0068] S105. The material to be processed is fed into the ultrasonic equipment. The ultrasonic tool head (welding head or roller) is pressed against the target area. Ultrasonic waves are applied to the adhesive structure along the extension direction of the target area, and the ultrasonic waves are simultaneously cut at the location where they are applied.

[0069] Under the influence of high-frequency ultrasonic vibration and pressure, the adhesive structure rapidly melts and penetrates into the fiber gaps between the upper and lower fabrics. Simultaneously, the cutting function of the ultrasonic tool head neatly cuts the edges of the three layers (fabric A, adhesive structure, and fabric B) along the extension direction of the adhesive structure, forming a seamless seam. If the adhesive structure is adhered to the side of the topmost target fabric facing away from the other fabric, ultrasonic waves are applied to the side of the adhesive structure covered with release paper. The ultrasonic waves penetrate the release paper and act on the adhesive structure, causing it to melt and penetrate into the fibers of the adjacent fabrics, achieving a strong bond. The release paper prevents the ultrasonic tool head from adhering to the molten adhesive, ensuring a smooth processing flow, and is peeled off along with any excess material after the ultrasonic treatment ends.

[0070] S106. Remove the tool head and allow the molten adhesive structure to cool and solidify together with the fabric.

[0071] Example 1, see Figure 3 Using two pieces of fabric (fabric A and fabric B) as an example, the above method will be further explained. Specifically, it includes the following steps: S201: A hot melt double-sided adhesive strip (e.g., 2mm wide, 0.1mm thick) is used as the adhesive structure, with its first side adhered to the target area of ​​fabric A (as the target fabric). The second side of the hot melt double-sided adhesive strip is covered with release paper. Subsequently, the hot melt double-sided adhesive strip is lightly pressed using a low-temperature iron to pre-fix it to fabric A.

[0072] S202: Place fabric B underneath fabric A, with the side of fabric A with the hot melt adhesive double-sided strip facing away from fabric B. At this point, the adhesive structure is located on the top surface of the uppermost fabric (fabric A).

[0073] S203: Feed the stacked fabric to the roller-type ultrasonic sewing machine. The ultrasonic tool head (welding head) presses against the target area from the release paper side. Start the machine; ultrasonic energy penetrates the release paper and acts on the contact surface between the hot melt adhesive double-sided tape and the fabric. Simultaneously, the cutting function of the ultrasonic tool head neatly cuts the edges of the three layers of material (fabric A, hot melt adhesive double-sided tape, and fabric B) along the extension direction of the adhesive strip.

[0074] Under the action of ultrasonic high-frequency vibration and pressure, the hot melt adhesive double-sided strip melts rapidly and penetrates into the fiber gaps of the upper and lower layers of fabric through pressure.

[0075] It should be noted that the ultrasonic parameters (such as power, vibration energy, or pressure) can be set according to the selected adhesive and fabric. The goal is to melt the adhesive under ultrasonic energy and penetrate the fabric under pressure. For example, for a combination of polyester fiber and double-sided hot melt adhesive, the ultrasonic power can be set between 100W and 250W, the frequency at 20kHz, and the welding time between 0.5 and 1.5 seconds to ensure the adhesive fully melts without carbonizing. The pressure should be controlled within the range of 0.2MPa to 0.4MPa to ensure effective penetration of the molten adhesive while avoiding excessive compression of the fabric structure, which would affect the feel and strength.

[0076] S204: Remove the tool head, and the molten hot melt adhesive double-sided tape cools and solidifies together with the fabric.

[0077] Hot melt adhesive double-sided strips form a strong bond at the seam, consisting of a cured adhesive that has penetrated the fibers and the fabric. Tests have shown that fabric seams sewn using this method have approximately 150% higher peel and tear strength compared to traditional pure ultrasonic sewing, and the seams are soft and free of any hard, bony texture.

[0078] Example 2 In Example 2, the remaining settings are the same as in Example 1, except that the adhesive structure is placed between fabric A and fabric B. Specifically, in step S201, after the first side of the hot melt adhesive double-sided strip is pasted onto the target area of ​​fabric A, the release paper on its second side is removed. Then, fabric B is placed on top of the hot melt adhesive double-sided strip, sandwiching the strip between the two layers of fabric. When ultrasonic waves are subsequently applied using a roller-type ultrasonic sewing machine, the energy acts directly on the exposed surface of the adhesive strip, causing the adhesive to melt and simultaneously penetrate into the gaps between the upper and lower fabric fibers. This structure avoids the attenuation of ultrasonic energy by the release paper, improves welding efficiency and uniformity, and forms a denser adhesive interface after cooling, further enhancing the seam strength and durability.

[0079] Example 3 In Example 3, the difference lies in the fact that three pieces of fabric (fabric A, fabric B, and fabric C) are used. Therefore, the steps (S201 and S202) for bonding the adhesive structure are different in Example 3, while the rest of the setup is the same as in Example 1. The specific operation is as follows: S301: Use two hot melt double-sided adhesive strips (e.g., 1.5mm wide and approximately 0.15mm thick) as the adhesive structure. Attach one of the hot melt double-sided adhesive strips with its first side facing away from the next layer of fabric A, while keeping the second side covered with release paper. Then attach the other hot melt double-sided adhesive strip between fabric B and fabric C, and remove the release paper, thus bonding fabric B and fabric C together using the second hot melt double-sided adhesive strip.

[0080] S302: Stack the three pieces of fabric, with fabric A on top, fabric B in the middle, and fabric C at the bottom, aligning the two hot melt double-sided adhesive strips vertically. At this point, the side of fabric A facing away from the next layer of fabric has the hot melt double-sided adhesive strip attached, along with release paper. Then, use a low-temperature iron to gently press the adhesive strips from the release paper side, pre-fixing both hot melt double-sided adhesive strips to their corresponding fabric pieces.

[0081] The stacked fabric is fed into a roller-type ultrasonic sewing machine. Ultrasonic vibrations are applied to the rollers, causing the two layers of hot-melt adhesive strips to melt simultaneously. The adhesive penetrates the fiber gaps between adjacent fabric layers. Under pressure, the three layers of fabric are tightly pressed together, forming a continuous and uniform adhesive layer after cooling. Testing shows that the peel and tear strength at the seam is increased by approximately 170%, and the folding resistance and fatigue resistance are significantly superior to traditional processes, making it suitable for sewing high-requirement functional garments and industrial textiles.

[0082] This application also provides a fabric article made by the sewing method described in any of the above embodiments. The tensile strength of the fabric article at the seam is significantly improved, and there are no obvious traces of glue overflow. The appearance is flat and beautiful.

[0083] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0084] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0085] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for sewing fabric, characterized in that, Includes the following steps: Obtain the material to be processed, which includes multiple layers of fabric stacked together, and an adhesive structure is bonded to at least one layer of fabric in a target area, the target area being the area of ​​the fabric used to connect with other fabrics; Ultrasonic waves are applied to the target area, and under the action of ultrasonic energy, the adhesive structure melts and penetrates between each pair of adjacent fabric layers to bond the at least two fabric layers together.

2. The fabric sewing method according to claim 1, characterized in that, The process of obtaining the material to be processed includes: Multiple layers of fabric are stacked together, and the adhesive structure is bonded to the target area of ​​the target fabric after the target fabric is stacked. Alternatively, the adhesive structure can be bonded to the target area of ​​the target fabric, and multiple layers of fabric can be stacked together. The target fabric is the fabric that needs to be bonded to the adhesive structure.

3. The fabric sewing method according to claim 2, characterized in that, The method further includes: After performing the step of attaching the adhesive structure to the target area of ​​the target fabric, the adhesive structure is hot-pressed to fix it, thereby pre-fixing the adhesive structure to the target fabric.

4. The fabric sewing method according to claim 1, characterized in that, Applying ultrasonic waves to the target area includes: applying ultrasonic waves to the adhesive structure along the extension direction of the target area, and simultaneously cutting the location where the ultrasonic waves are applied.

5. The fabric sewing method according to claim 2, characterized in that, The adhesive structure includes a first surface and a second surface, both of which are adhesive, and the second surface is covered with release paper. The target fabric includes the topmost layer of fabric after being stacked, and the step of attaching the adhesive structure to the target area of ​​the target fabric includes: attaching the first side of the adhesive structure to the side of the topmost fabric that is away from the next layer of fabric. Applying ultrasonic waves to the target area includes applying ultrasonic waves from one side of the release paper to the target area.

6. The fabric sewing method according to claim 1, wherein the target fabric comprises the fabric at the top layer after being stacked and / or the fabric at the bottom layer and / or the fabric in the middle layer.

7. The fabric sewing method according to claim 1, characterized in that, The adhesive structure can be continuous strips, discontinuous dots, or lines.

8. The fabric sewing method according to claim 1, characterized in that, The width of the adhesive structure is not greater than the width of the target area.

9. The fabric sewing method according to claim 8, characterized in that, The width of the adhesive structure ranges from 0.1cm to 1.5cm, and the thickness ranges from 0.05mm to 0.3mm.

10. The fabric sewing method according to claim 1, characterized in that, The fabric is made of a material that cannot be melted by ultrasonic energy to achieve bonding.

11. A fabric product, characterized in that, The fabric article is a fabric article made by the fabric sewing method according to any one of claims 1 to 10.

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