Preparation method of electro-embroidery product, electro-embroidery product, vamp and footwear product

Abstract

According to the preparation method of the electric embroidery product, the electric embroidery product, the shoe upper and the shoe product, the thermoplastic skin-core structure yarn is introduced to serve as a framework and is cooperatively embroidered with the upper thread, dependence on base cloth is thoroughly eliminated, the material utilization rate and the environmental protection property are greatly improved, the technological process is optimized, and the production cost is reduced. The production efficiency and the product quality are obviously improved, the structural limitation of a traditional product is broken through, a three-dimensional embroidery structure is realized, and the design freedom degree is greatly expanded.

Description

Technical Field

[0001] This application relates to the field of embroidery technology, and in particular to a method for preparing an electro-embroidery product, the electro-embroidery product, shoe uppers, and footwear products. Background Technology

[0002] Currently, in the field of embroidery, the conventional embroidery method mainly involves embroidering on a base fabric. This technique has long been widely used in various industries such as clothing, home textiles, decoration, bags, and leather goods, playing a vital role in meeting people's decorative needs for various items. From a market application perspective, whether it's the exquisite embroidery patterns on high-end fashion or the delicate embroidery decorations in home furnishings, the conventional embroidery technique based on a base fabric has become a relatively mature and common technical method in the industry.

[0003] However, this embroidery technique, which relies on a base fabric, has gradually revealed many drawbacks in practical applications, mainly in the following aspects: First, the material utilization efficiency is low, and resource waste is serious. The use of a base fabric means that a large amount of additional fabric resources are needed throughout the entire embroidery production process. Each embroidery operation requires a corresponding base fabric, which not only directly increases the procurement cost of raw materials, but also causes serious resource waste when the base fabric is not an essential component of the final product. For example, in many products where only the embroidered pattern is needed as a decorative element, the base fabric is often partially cut and discarded after the embroidery is completed, or it is used only as a temporary support and loses its actual value in the final product. This "disposable" model contradicts the green, environmentally friendly, and sustainable development concepts pursued by modern manufacturing.

[0004] Secondly, the process is complex and inefficient. Conventional embroidery relies heavily on the base fabric, making the entire production process exceptionally cumbersome. First, before embroidery, the base fabric requires a series of pre-treatments, including washing, ironing, and cutting, to ensure its flatness and dimensional accuracy meet the embroidery requirements. These pre-processing steps are not only time-consuming and labor-intensive but also increase the complexity of production management. Secondly, during embroidery, the inherent properties of the base fabric, such as elasticity, thickness, and texture, can easily lead to quality problems like pattern deformation and uneven stitches. When using common knitted fabrics as the base, their elasticity allows them to be stretched and deformed under the tension generated by the needle's movement. This causes the embroidered pattern to shrink along the stitch direction and stretch perpendicular to the stitches, resulting in a significant deviation between the actual embroidered sample and the design. This problem forces embroidery pattern makers to repeatedly revise and correct the pattern, sometimes requiring multiple trial runs to meet design requirements, significantly impacting production efficiency and product delivery time. Furthermore, after the embroidery is completed, complex post-processing is required on the base fabric and the embroidered product, such as trimming excess edges of the base fabric and cleaning to remove stains left over from the production process. These additional processes further increase the investment of manpower, material resources, and time.

[0005] Third, the product's structural form is limited, resulting in insufficient three-dimensional expression. The fabric-based embroidery process dictates that the finished product always contains the fabric material. This inherent characteristic restricts the independent application of the embroidered portion, and the presence of the fabric significantly affects the transparency and lightweight nature of the final product. Even with thicker embroidery thread, the three-dimensional effect achievable with conventional embroidery is relatively limited, making it difficult to create an embroidered body with a significant three-dimensional spatial structure and self-supporting capabilities. In other words, traditional embroidery is essentially a two-dimensional decoration on the flat surface of the fabric, unable to truly achieve a three-dimensional embroidery structure that can exist independently without the support of the fabric.

[0006] Fourth, design freedom is severely limited, and the space for innovation is compressed. Pattern design must always consider its coordination with the base fabric, making it impossible to achieve a fully transparent embroidery structure similar to "openwork." The limitations of traditional embroidery techniques are particularly pronounced in design applications that pursue extremely sparse, transparent, or specific functional structures. Designers' creative expression is often constrained by the presence of the base fabric, preventing them from fully utilizing the structural innovation potential of embroidery.

[0007] In conclusion, the material waste, complex processes, and structural limitations caused by the reliance on base fabric in conventional embroidery techniques have seriously restricted the further development and innovative applications of the embroidery industry. Summary of the Invention

[0008] In order to solve one or more of the technical problems mentioned above in the prior art, this application provides a method for preparing an embroidered product, an embroidered product, a shoe upper and a footwear product, so as to solve the problems of material waste, process complexity and structural limitation caused by the dependence on the base fabric in the existing embroidery process.

[0009] To achieve the above objectives, the technical solution adopted by this application to solve its technical problem is as follows: In a first aspect, this application provides a method for preparing an electro-embroidery product, the method comprising: On the embroidery template, multiple thermoplastic core-shell structure yarns are arranged and fixed according to the preset layout. Using top thread and bottom thread, straight embroidery is performed on the embroidery template, perpendicular to the direction of the yarn arrangement of the core structure, so that the top thread and the bottom thread are interwoven and tied to fix the core structure yarn, forming a two-dimensional basic structure; The two-dimensional basic structure is transferred from the embroidery template to a hot pressing device for hot pressing treatment, so that the outer layer of the core structure yarn melts and forms a fused structure at the yarn interlacing point. After cooling and solidification, the embroidery product is obtained.

[0010] This application solution, by introducing thermoplastic core-sheath structure yarn as a skeleton and embroidering it in conjunction with the face yarn, completely eliminates the dependence on the base fabric, greatly improves material utilization and environmental friendliness, optimizes the process flow, significantly improves production efficiency and product quality, and breaks through the structural limitations of traditional products.

[0011] In one specific embodiment, the arrangement method includes horizontal or vertical arrangement, and / or the arrangement method and the density of the arrangement are determined according to the embroidery product.

[0012] This application achieves precise matching and collaborative optimization between the two-dimensional basic structure and the final embroidery product by associating the arrangement (horizontal or vertical) and density of the core-sheath structure yarns with the embroidery product.

[0013] In one specific embodiment, the face yarn is made of the same or compatible yarn as the core-sheath structure yarn; And / or, the bottom line is made of transparent single yarn.

[0014] This application solution achieves synergistic matching of material properties by using the same or compatible yarn as the core-sheath structure yarn for the top thread, optimizing the welding effect, simplifying the process flow, reducing the complexity requirements of the equipment, ensuring the uniformity of the product appearance, and improving visual quality. Using transparent single yarn as the bottom thread effectively avoids visual interference caused by the mismatch between the bottom thread color and the top thread or base fabric color. On the other hand, because the single yarn has a relatively small diameter, it can pass smoothly through the needle eye and shuttle mechanism when used with the top thread for high-speed electric embroidery, significantly reducing the risk of equipment failure such as needle jamming, thread breakage, or tension fluctuations caused by excessively thick yarn.

[0015] In one specific embodiment, the step of using top and bottom threads to perform straight embroidery on the embroidery template, perpendicular to the yarn arrangement direction of the core structure, includes: According to the embroidery file, the top thread and bottom thread are used to perform straight embroidery on the electric embroidery template, perpendicular to the yarn arrangement direction of the core structure. The embroidery file includes at least stitch position and stitch density information.

[0016] This proposed solution enables precise control of the embroidery process, ensuring the regularity of the two-dimensional basic structure.

[0017] In one specific embodiment, after forming the two-dimensional basic structure, the method further includes: Embroidery is performed on the two-dimensional basic structure according to a preset pattern to form a three-dimensional structure with the features of the preset pattern.

[0018] This application can further form a three-dimensional structure with preset pattern features, greatly expanding the freedom of design.

[0019] In one specific embodiment, the embroidery work performed on the two-dimensional basic structure according to a preset pattern includes: Embroidery is performed on the two-dimensional basic structure according to the embroidery file, and the embroidery file includes at least the pattern outline, line direction and stitch variation data.

[0020] This application solution achieves precise digital shaping of three-dimensional structures, significantly enhancing the three-dimensional expressiveness of patterns.

[0021] In one specific embodiment, the step of embroidering according to a preset pattern on the two-dimensional basic structure based on the embroidery file includes: The outline of the preset pattern is drawn using a flat stitch, and the edge of the preset pattern is encrypted using a lockstitch.

[0022] This application solution achieves precise definition of pattern outlines, significantly improves pattern clarity and visual sharpness, enhances the structural strength of pattern edges, effectively prevents edge loosening and deformation, optimizes the transition effect of three-dimensional form, and enhances the product's sense of layering and three-dimensionality.

[0023] In one specific embodiment, the hot pressing process is carried out at a preset temperature and a preset pressure, the preset temperature and the preset pressure being determined based on the material properties of the sheath layer of the core-sheath structure yarn.

[0024] The proposed solution achieves precise matching between process parameters and material properties, ensuring the reliability of the welding effect, realizing stable and controllable welding quality, and significantly improving product consistency and yield.

[0025] In one specific embodiment, the core layer of the core-sheath structure yarn comprises a non-thermoplastic material, and the sheath layer of the core-sheath structure yarn comprises a thermoplastic material.

[0026] This application achieves a synergistic balance between thermoplastic formability and structural stability, overcomes the functional limitations of single materials, and significantly improves the mechanical properties and long-term durability of three-dimensional structures.

[0027] In one specific embodiment, the core layer of the core-sheath structure yarn comprises polyester or nylon, and the sheath layer of the core-sheath structure yarn comprises polyester, polyamide, or polyurethane.

[0028] Secondly, this application also provides an embroidery product, which includes a two-dimensional basic structure formed by multiple thermoplastic core-shell structure yarns, top yarns, and bottom yarns. The multiple thermoplastic core-shell structure yarns are arranged in a preset layout. The top yarns and bottom yarns are interwoven and bundled to fix the core-shell structure yarns along a direction perpendicular to the layout of the core-shell structure yarns. The core-shell structure yarns and the top yarns are fused together at the interlacing points of the core-shell structure yarns and the top yarns to form a fused structure.

[0029] In one specific embodiment, the embroidery product further includes a three-dimensional structure with preset pattern features disposed on the two-dimensional basic structure.

[0030] Thirdly, this application also provides a shoe upper, which is prepared by the method for preparing an electro-embroidered product as described in any one of the first aspects; Alternatively, the shoe upper may be prepared using an electro-embroidered product as described in the second aspect.

[0031] Fourthly, this application also provides a footwear product, the footwear product including a sole and an upper connected to the sole; The upper includes the upper as described in the third aspect. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a flowchart of a method for preparing an embroidered product according to some embodiments of this application; Figure 2 This is a schematic diagram of the upper structure provided in some embodiments of this application.

[0034] Figure 3 for Figure 2 Enlarged view of point A in the middle. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] As described in the background section, the existing electroembroidery process suffers from problems such as material waste, process complexity, and structural limitations due to its reliance on base fabric, which has seriously restricted the further development and innovative application of the electroembroidery industry.

[0037] To address one or more of the aforementioned problems, this application proposes a novel method for preparing embroidered products, embroidered products, shoe uppers, and footwear products. By introducing thermoplastic core-skin structure yarn as a skeleton and working in conjunction with the top thread for embroidery, the method completely eliminates the dependence on the base fabric, significantly improves material utilization and environmental friendliness, optimizes the process flow, and significantly improves production efficiency and product quality, breaking through the structural limitations of traditional products.

[0038] The solution of this application will now be described in detail with reference to the accompanying drawings and various embodiments.

[0039] Example 1 To achieve the solution of this application, an embodiment of this application provides a method for preparing an electroembroidery product, referring to... Figure 1 As shown, the method includes the following steps: S100: On the embroidery template, multiple thermoplastic core-shell structure yarns are arranged and fixed according to the preset layout.

[0040] In some embodiments, the method for preparing the embroidery product provided in this application first constructs a baseless embroidery substrate on an embroidery template. Specifically, according to a preset arrangement, multiple thermoplastic core-sheath structure yarns are precisely arranged on the surface of the embroidery template, and their positions are kept stable by appropriate fixing means (such as temporary adhesion, slot positioning, or edge clamping).

[0041] Through this step, multiple thermoplastic core-sheath structure yarns form a mesh-like skeleton structure with a predetermined spatial configuration on the embroidery template. This skeleton structure not only completely replaces the base fabric material required in traditional embroidery processes, eliminating the root cause of subsequent material waste, but more importantly, it constitutes a fully controllable and designable two-dimensional basic framework—its directionality determines the interlacing angle of subsequent surface thread embroidery, its density determines the support strength of the base area, and its fixed state provides stable working conditions for subsequent straight-line embroidery perpendicular to the yarn direction.

[0042] Furthermore, since the yarn used has a core-sheath structure (the sheath is a thermoplastic material, and the core is preferably a non-thermoplastic material), this skeleton structure will have the ability to be welded and shaped in the subsequent hot pressing process, thus laying the material foundation for the transformation from a two-dimensional planar substrate to a three-dimensional structure.

[0043] S200: Using top thread and bottom thread, straight embroidery is performed on the embroidery template, perpendicular to the direction of the yarn arrangement of the core structure, so that the top thread and the bottom thread are interwoven and tied to fix the core structure yarn, forming a two-dimensional basic structure.

[0044] In some embodiments, after arranging and fixing the core-sheath structure yarns, the preparation method proceeds to the construction stage of the two-dimensional basic structure. Specifically, top and bottom threads are used to perform straight embroidery perpendicular to the direction of the core-sheath structure yarns on the embroidery template, so that the top and bottom threads form an interlaced and bound relationship to fix multiple core-sheath structure yarns, thereby constructing a stable two-dimensional grid-like basic structure on the template.

[0045] In this step, the embroidery direction is strictly set perpendicular to the arrangement direction of the core-sheath structure yarns. When the top and bottom threads cross and wrap around multiple parallel core-sheath structure yarns perpendicularly, they form an orthogonal interweaving relationship in space. This vertically intersecting embroidery design makes each stitch of the top and bottom threads act like a binding strap, connecting and locking multiple parallel core-sheath structure yarns together to form a holistic planar structure. The top and bottom threads mainly play a binding and fixing role in this process, while the core-sheath structure yarns form the skeletal support system of the structure.

[0046] The two-dimensional basic structure formed through this step has the following characteristics and functions: First, it is a regular grid-like plane, where the face yarn and the core structure yarn form a mechanical lock at the interlacing points, ensuring the overall stability of the structure; Second, it completely replaces the base fabric required in traditional electric embroidery, eliminating the root cause of subsequent material waste; Third, it serves as a platform for subsequent three-dimensional floral embroidery, providing a flat and stable base for the face yarn to embroider according to the preset floral pattern; Fourth, because the core structure yarn has a thermoplastic skin, each interlacing point in this two-dimensional basic structure will become a potential welding node in the subsequent hot pressing process, thus laying the structural foundation for the transformation from a two-dimensional plane to a three-dimensional structure.

[0047] S300: The two-dimensional basic structure is transferred from the embroidery template to a hot pressing device for hot pressing treatment, so that the outer layer of the core structure yarn melts and forms a fused structure at the yarn interlacing point. After cooling and solidification, the embroidery product is obtained.

[0048] After completing the two-dimensional basic structure, the preparation method enters the final shaping stage. Specifically, this step involves removing the two-dimensional basic structure from the embroidery template and transferring it to a hot-pressing device for hot-pressing treatment. Under preset temperature and pressure, the outer layer of the core-sheath structure yarn melts and flows, forming a fused structure at the yarn interlacing points; subsequently, it is cooled and solidified, permanently fixing the relative positions of all yarns, ultimately obtaining an embroidery product with a stable two-dimensional shape.

[0049] In some embodiments, after forming the two-dimensional infrastructure, the method further includes: Embroidery is performed on the two-dimensional basic structure according to a preset pattern to form a three-dimensional structure with the features of the preset pattern.

[0050] After completing the construction of the two-dimensional basic structure, the preparation method enters the three-dimensional structure shaping stage. Specifically, in this step, embroidery is performed on the two-dimensional basic structure according to a preset pattern. Through the directional accumulation of threads and variations in stitching techniques, a three-dimensional structure with a three-dimensional spatial form is constructed on the two-dimensional planar base. That is, using the two-dimensional basic structure as a carrier platform, the embroidery technique endows it with floral features and a three-dimensional form. In the specific implementation process, the threads are embroidered in multiple directions and layers on the two-dimensional basic structure according to the outline, direction, and layering requirements of the preset pattern. As the threads are continuously accumulated and interwoven on the two-dimensional basic structure, the originally flat grid-like base gradually produces changes in thickness, undulations, and turns, ultimately forming a pattern structure with a significant three-dimensional spatial form.

[0051] It should be noted that the two-dimensional base structure itself is a flat, grid-like plane, possessing only two-dimensional features extending within the plane. Through this step of embroidery, the surface threads are stacked on the two-dimensional base structure according to a pre-set pattern, causing a significant increase in the thickness direction (i.e., the direction perpendicular to the base plane). As the embroidery progresses, the outline of the pre-set pattern gradually rises and the layers become more distinct, ultimately forming a three-dimensional structure with variations in height, depth, and curvature, completely breaking through the limitations of traditional electric embroidery, which is limited to two-dimensional planar decoration. Understandably, after this step, although the three-dimensional structure already possesses the features of the pre-set pattern, its morphological stability depends entirely on the mechanical intertwining between the surface threads and the core structure yarns. Once subjected to external forces or washing, it is highly susceptible to deformation or loosening. Therefore, when electric embroidery products include a three-dimensional structure, after completing the three-dimensional structure, it is transferred from the electric embroidery template to a hot-pressing device for hot-pressing treatment. Through hot-pressing, the outer layer of the core structure yarn melts, forming a material fusion connection at the interlacing points, transforming the mechanical intertwining into a permanent material fusion. After cooling and solidification, this fused structure endows the product with excellent shape memory capabilities, enabling it to maintain the designed three-dimensional shape for a long time. In other words, this embodiment utilizes the thermoplastic properties of the core-sheath structure yarn to transform the temporary shape created by embroidery into a permanent structure. Specifically, the three-dimensional structure carrying the preset pattern features is peeled from the temporary embroidery template and placed between the upper and lower templates of a hot-pressing device. Under the combined action of heat and pressure, the sheath material of the core-sheath structure yarn reaches its melting temperature, transforming from a solid to a molten state and fusing together at the interlacing points. When the pressure is released and the temperature decreases, the molten sheath re-solidifies, firmly bonding each interlacing point between the surface yarn and the core-sheath structure yarn, and between the surface yarns themselves, thereby enabling the entire three-dimensional structure to achieve stable shape retention.

[0052] It should be noted that the embroidery template in this embodiment is not the base fabric used in traditional embroidery processes, but rather a basic platform used to temporarily fix, position, and support thermoplastic core-sheath structure yarns. The embroidery template provides a precise layout basis for multiple core-sheath structure yarns. The operator places and fixes the yarns on the template according to a preset layout method (such as horizontal, vertical, or a specific sparseness), thereby ensuring accurate relative positional relationships between the yarns and forming a basic grid that meets design requirements. During the embroidery process with the surface yarns, the embroidery template acts to clamp and stabilize the yarns. It ensures that the arranged yarns do not slip or misalign when subjected to the piercing of the embroidery needle and the tension of the surface yarns, thus guaranteeing precise interweaving of the surface yarns with the core-sheath structure yarns to form a regular two-dimensional basic structure. In other words, the embroidery template is a transitional tool. After the two-dimensional basic structure is completed and a three-dimensional pattern is further embroidered on it, the entire semi-finished structure needs to be transferred from the embroidery template for subsequent heat pressing and shaping. Therefore, the embroidery template itself does not become part of the final product.

[0053] In some embodiments, the arrangement of the core-sheath structure yarns on the embroidery template can be selected according to the specific design requirements of the embroidery product, including but not limited to horizontal or vertical arrangement. Horizontal arrangement refers to arranging multiple core-sheath structure yarns in parallel along the horizontal direction (i.e., the horizontal direction or the X-axis direction) of the embroidery template; vertical arrangement refers to arranging multiple core-sheath structure yarns in parallel along the vertical direction (i.e., the vertical direction or the Y-axis direction) of the embroidery template. In specific implementation, a single-direction arrangement can be selected according to the characteristics and structural requirements of the final embroidery product, or a combination of horizontal and vertical arrangements can be used in different areas of the same template.

[0054] Understandably, horizontal and vertical arrangement provides a clear directional reference for the subsequent vertical embroidery of the top and bottom threads. When the top and bottom threads are embroidered in straight lines perpendicular to the direction of the core structure yarns, if the core structure yarns are horizontally arranged, the top and bottom threads are embroidered in straight lines in the vertical direction; if the core structure yarns are vertically arranged, the top and bottom threads are embroidered in straight lines in the horizontal direction. This orthogonal relationship ensures that the top threads and the core structure yarns, which serve as the framework, can form a regular grid structure. More importantly, by choosing an arrangement method that adapts to the main direction of the embroidery product, the direction of the core structure yarns can be matched with the force direction or texture direction of the final embroidery product—for horizontally extending embroidery products, horizontal arrangement allows the framework yarns to be aligned with the main direction of the embroidery product, providing more even support; for vertically extending embroidery products, vertical arrangement is more conducive to maintaining shape stability.

[0055] Lateral and vertical yarn arrangements impart different mechanical properties to two-dimensional basic structures. Lateral arrangements, with continuous yarns running horizontally, exhibit stronger tensile strength in the lateral direction; similarly, vertical arrangements, with continuous yarns running vertically, exhibit stronger tensile strength in the vertical direction. This anisotropic characteristic allows for targeted design based on product requirements—continuous yarns are arranged in directions requiring greater tensile force, while secondary directions can be met through yarn bundling, thus optimizing material utilization.

[0056] The choice of arrangement direction directly affects the alignment accuracy during subsequent three-dimensional floral embroidery. When the core-sheath structure yarns are arranged in a clear horizontal or vertical direction, it is equivalent to establishing a coordinate grid system on the template. During subsequent embroidery according to the floral pattern, the surface threads can be precisely positioned based on this coordinate system, ensuring that each stitch falls on the expected interlacing node, thus achieving high-precision reproduction of complex floral patterns. Furthermore, horizontal and vertical arrangements, as two basic arrangement methods, provide flexible skeleton construction options. For example, for highly symmetrical floral patterns, a single-direction arrangement is sufficient; for floral patterns with complex orientations or anisotropic characteristics, different arrangement directions can be used in different sections within the same product to achieve precise adaptation of the skeleton structure to the floral features. This design flexibility allows this preparation method to adapt to a wide range of applications, from simple geometric patterns to complex artistic floral designs.

[0057] In some embodiments, the arrangement and density of the core-sheath structure yarns on the embroidery template are not fixed but can be adaptively determined according to the embroidery product. That is, before starting the arrangement work, the geometric characteristics, structural complexity, and three-dimensional shape requirements of the embroidery product are first analyzed. Then, based on the analysis results, the arrangement method (such as horizontal arrangement, vertical arrangement, or a combination thereof) is selected in a targeted manner, and the density of the arrangement (i.e., the number of yarns arranged per unit length) is determined so that the constructed two-dimensional basic structure is precisely matched with the final embroidery product.

[0058] In some embodiments, the thermoplastic core-sheath structure yarn adopts a core-sheath composite structure design, wherein the core layer is composed of a non-thermoplastic material and the sheath layer is composed of a thermoplastic material. This material combination design allows the yarn to combine the structural stability of non-thermoplastic materials with the heat-melting bonding ability of thermoplastic materials, providing an ideal performance foundation for subsequent embroidery and heat-pressing processes.

[0059] Specifically, the non-thermoplastic material used in the core layer refers to materials that do not soften, melt, or significantly deform under heating conditions (especially within the temperature range of subsequent hot pressing), including but not limited to conventional high-strength, high-modulus fibers such as polyester, nylon, aramid, carbon fiber, and glass fiber. These materials maintain their original solid state and mechanical properties throughout the hot pressing process, providing stable skeletal support for the entire three-dimensional structure. The thermoplastic material used in the skin layer refers to materials that can soften, melt, and re-solidify after cooling under heating conditions, including but not limited to low-melting-point polyester, copolyamide, polypropylene, polyethylene, and thermoplastic polyurethane. These materials transform from a solid to a molten state upon reaching a specific temperature, allowing them to flow under pressure and wet the gaps between yarn interlacing points, fusing with the skin layers of adjacent yarns and forming strong welded joints after cooling.

[0060] Understandably, the thermoplastic outer layer endows the yarns with thermoplastic bonding capabilities, enabling the two-dimensional basic structure to form a permanent welded connection at the yarn interlacing points during hot pressing, thus achieving the transformation from a planar substrate to a three-dimensional form. The non-thermoplastic core layer maintains its original shape and mechanical properties throughout the hot pressing process, unaffected by high temperatures and thus unaffected by softening or deformation, ensuring that the three-dimensional structure maintains its predetermined geometric shape throughout the welding process. This synergistic effect of thermoplastic bonding in the outer layer and skeletal support in the core layer achieves a balance between thermoplastic moldability and structural stability that cannot be achieved with a single material.

[0061] In some embodiments, 1200D thermoplastic core-sheath structure yarn can be selected as the base yarn material. Multiple base yarns are sequentially fixed on the embroidery mold according to a 1-space-1, 3-space-1, 2-space-1 arrangement (i.e., an alternating arrangement) to form a skeleton base with a preset sparseness and directionality. In some embodiments, the top yarn can be the same as or compatible with the core-sheath structure yarn in step S100. That is, the top yarn used for straight embroidery and floral embroidery has a material composition that is consistent with or substantially consistent with the core-sheath structure yarn pre-arranged on the embroidery mold, and also adopts a core-sheath composite structure, wherein the core layer includes a non-thermoplastic material and the sheath layer includes a thermoplastic material. The compatibility between the top yarn and the core-sheath structure yarn refers to their compatibility at the chemical level, including but not limited to their melt compatibility, such as matching melting points, mutual wetting after melting, and bonding together. It should be noted that when the top yarn and the core-sheath structure yarn use the same or compatible materials, they have consistent hot-melt characteristics during the hot-pressing process. Under preset temperature and pressure, the sheath of the face yarn and the sheath of the core yarn melt synchronously and fuse together at the interlacing points to form a uniform and strong fused structure. Compared to using face yarns with vastly different properties (such as conventional non-thermoplastic embroidery thread), this homogenized material design avoids problems such as poor welding, localized detachment, or weak interfaces caused by mismatches in thermal expansion coefficients, melting temperatures, or fluidity, significantly improving the overall structural strength and durability of the three-dimensional structure.

[0062] Furthermore, using yarns that are the same as or compatible with the core-sheath structure yarns as the face yarns allows for setting process parameters only for a single type of material throughout the embroidery and hot-pressing process. Whether it's tension control during embroidery or temperature, pressure, and time settings during hot pressing, there's no need to set complex control programs for different types of yarns. This not only simplifies pre-production preparation and reduces the precision requirements of the equipment, but also minimizes process adjustments due to material differences, thereby improving production efficiency and process stability.

[0063] Furthermore, when the top thread and the core yarn are consistent or highly similar in material, thickness, luster, and color, the final embroidered product presents a harmonious and unified visual effect. The floral patterns embroidered with the top thread are seamlessly integrated with the core yarn, which serves as the framework, without obvious color differences, reflective variations, or textural discontinuities. This ensures that the product maintains a beautiful and refined surface texture under both natural light and specific lighting conditions, meeting the stringent requirements of high-end decorative applications for product appearance.

[0064] In some embodiments, 800D thermoplastic core-sheath structure yarn can be used as the top yarn and 200D transparent monofilament as the bottom yarn. After adjusting the tension of the top and bottom yarns and confirming that the sewing effect is good, horizontal sewing is performed to fix the stitches. Through horizontal straight stitching, the top yarn and the bottom yarn are interwoven and tied vertically, locking the originally parallel bottom yarns together to form a stable two-dimensional basic structure.

[0065] In some embodiments, the bobbin thread can be made of transparent monofilament. Firstly, transparent monofilament has excellent optical transmittance, effectively eliminating visual interference. During embroidery, traditional colored bobbin thread is prone to showing through the front of the embroidery due to fluctuations in stitch density or changes in thread tension, especially when embroidering on light-colored base fabric or with alternating layers of multi-colored threads, often resulting in defects such as visible backing or color bleeding. Transparent monofilament, with its light transmittance, can visually blend with any color thread and base fabric. Regardless of color variations in the embroidered area, it will not create shadows, spots, or outlines on the front of the embroidery, significantly improving the appearance quality and color reproduction of the embroidery, giving product design greater freedom in color selection. Secondly, the relatively small diameter of the monofilament significantly improves the smoothness of the embroidery process and the stability of the equipment. The finer diameter allows the bobbin thread to pass smoothly and flexibly through the needle eye, shuttle mechanism, and thread interlacing area during high-speed embroidery, greatly reducing the risk of common equipment malfunctions such as needle jams, thread breaks, and tension fluctuations caused by excessively thick threads. Meanwhile, the larger amount of winding of the finer diameter single yarn on the bobbin effectively reduces the frequency of bobbin replacement, which is conducive to continuous and automated production. In addition, the smaller yarn diameter allows it to fit more tightly against the surface of the skeleton yarn when interlacing and binding with the core-sheath structure yarn. This forms uniform and concealed fixing points without interfering with the preset arrangement of the skeleton yarn, laying a smooth and stable technological foundation for the subsequent precise molding and hot-pressing of the three-dimensional structure.

[0066] In some embodiments, the step of using top and bottom threads to perform straight embroidery on the embroidery template in a direction perpendicular to the yarn arrangement of the core structure further includes the step of performing straight embroidery according to an embroidery file. Specifically, after the arrangement and fixing of the core structure yarns are completed, a pre-prepared embroidery file is invoked, and the embroidery machine is controlled to perform straight embroidery on the embroidery template in a direction perpendicular to the yarn arrangement of the core structure yarns, according to the parameters set in the instructions.

[0067] It should be noted that an embroidery file is a file containing stitch data and color information of the embroidery pattern, which can be recognized and executed by an embroidery machine. Common formats include DST, DSB, and EMB. This file contains all the motion parameters and process instructions required for the embroidery machine to complete the entire pattern. In some embodiments, the embroidery file includes at least stitch position and stitch density information to precisely guide the placement and density of each stitch. Specifically, the stitch position information determines the specific placement point of the straight stitches, i.e., the coordinate position on the template where each stitch of the top and bottom threads should fall perpendicular to the direction of the core yarn arrangement; the stitch density information determines the number of stitches per unit length, i.e., the spacing between adjacent stitches along the embroidery direction.

[0068] By introducing embroidery files, the embroidery paths of the top and bottom threads no longer rely on manual experience or repetitive mechanical adjustments, but are precisely executed based on preset stitch positions and density information. The stitch position information ensures that each top thread accurately and perpendicularly crosses the preset core-sheath yarn arrangement area, creating a precise orthogonal interweaving relationship between the top and bottom threads and the core-sheath yarn that forms the framework. The stitch density information ensures the uniformity and consistency of the top thread distribution. This digital control method results in a highly regular grid pattern in the final two-dimensional basic structure, providing a flat and stable platform for subsequent three-dimensional embroidery.

[0069] The stitch density information in the embroidery file directly determines the tightness of the binding between the top and bottom threads and the core structure yarns. By digitally controlling the stitch density, refined design can be achieved while ensuring sufficient bonding strength: in areas requiring strong structural support, a higher stitch density can be set to increase the interlacing frequency of the top and bottom threads with the core structure yarns, enhancing the binding effect; in areas requiring lightweight or transparent effects, a lower stitch density can be set to reduce material usage. This quantitative control capability allows the mechanical properties of the two-dimensional basic structure to be precisely designed according to the subsequent pattern requirements, avoiding insufficient bonding or material redundancy caused by improper stitch density in traditional processes.

[0070] Understandably, embroidery based on embroidery files transforms traditional techniques reliant on operator skill into storable, transmissible, and repeatable digital information. Once an embroidery file is created for a specific product, it can be accurately reproduced an unlimited number of times in subsequent production, completely eliminating product quality fluctuations caused by operator differences and equipment status variations. The stitch position and density information for the same product can be precisely applied to different batches, at different times, and on different equipment, ensuring high consistency across batches and meeting the stringent quality stability requirements of large-scale production.

[0071] In some embodiments, the embroidery work on a two-dimensional base structure according to a preset pattern further includes the step of performing the embroidery work according to an embroidery file. Specifically, after the construction of the two-dimensional base structure is completed, a pre-prepared embroidery file is invoked, and the embroidery machine is controlled to perform embroidery work on the two-dimensional base structure according to the parameters set in the embroidery file, so as to form a three-dimensional structure with preset pattern features. The embroidery file includes at least pattern outlines, line directions, and stitch variation data, which are used to accurately guide the embroidery trajectory and stacking method of the threads on the two-dimensional base structure.

[0072] Among them, the pattern outline data is used to determine the boundary range of the preset pattern, that is, where the stitch should be started and stopped to form a clear pattern edge; the line direction data is used to determine the direction and path of the stitch embroidery, that is, along which trajectory to embroider to achieve the expected texture effect and force distribution; the stitch variation data is used to determine the type of stitch and its parameters used in different areas, including but not limited to the selection of stitches such as flat stitch, tatami stitch, and lock stitch, as well as the dynamic adjustment of parameters such as stitch density and stitch length.

[0073] By utilizing pattern outlines, line directions, and stitch variation data from the embroidery files, the embroidery path of the surface thread is no longer limited to simple planar filling, but rather involves spatial path planning based on the target three-dimensional shape. Pattern outline data defines the boundary of the three-dimensional structure, ensuring a clear and regular outer edge; line direction data guides the laying direction of the surface thread on the two-dimensional base structure, guiding the generation of curved surfaces in the three-dimensional shape by controlling the direction of the stitches; and stitch variation data achieves differentiated control of the surface thread accumulation by using different stitch types and densities in different areas—using denser stitches or thicker stitches in areas requiring a high-raised effect, and sparser stitches or gentler stitches in areas requiring a smooth transition. This digital shaping method allows the final three-dimensional structure to accurately reproduce the design intent, with precise control over both embossed raised effects and smooth curved transitions.

[0074] In traditional embroidery, due to the elasticity and uncertainty of the base fabric, complex patterns (especially those with subtle gradations, sharp corners, or openwork structures) are often difficult to reproduce accurately. This application's embodiment transforms every detail of the design artwork into executable embroidery parameters through embroidery files: pattern outline data ensures clear and sharp edges, avoiding overflow or blurred edges; line direction data ensures smooth, undistorted curves and natural transitions at line turns; and stitch variation data achieves different textures through varied stitch combinations, such as a flat stitch for a smooth surface, a tatami stitch for a matte finish, and a lockstitch to reinforce edge contours. This precise digital execution allows designers' creative expressions to be fully realized without the limitations of the process.

[0075] In some embodiments, the embroidery work performed on a two-dimensional basic structure according to a preset pattern, based on an embroidery file, further includes a composite embroidery step of outlining and edge reinforcement. Specifically, during the three-dimensional pattern embroidery process, the flat stitch is first used to embroider along the outline of the preset pattern, accurately outlining the boundary of the preset pattern; then, the lock stitch is used to reinforce the edge of the outlined preset pattern, forming a reinforced layer near the outline. Through the sequential combination of flat and lock stitches, the precise definition and structural reinforcement of the pattern edge are achieved. The flat stitch is a basic embroidery technique that forms uniform linear stitches through continuous piercing of the thread on a two-dimensional basic structure, used to accurately depict the outline boundary of the pattern; the lock stitch is an embroidery technique with a self-locking structure that forms a tight stitch structure through the nesting of thread loops, creating a high-density reinforced area when embroidering along the edge of the pattern.

[0076] The initial outline of the pre-designed pattern is created using a flat stitch, essentially defining precise boundaries for subsequent embroidery on a two-dimensional foundation. The continuous, uniform stitches formed by the flat stitch clearly distinguish the inner filling area of ​​the floral pattern from the outer background area, preventing potential issues like pattern diffusion, overflow, or blurred edges that might occur during subsequent filling. This outlining process ensures that the final three-dimensional pattern has sharp, clean edges, resulting in a more refined and professional visual effect that meets the stringent edge precision requirements of high-end decorative applications. Following the flat stitch outline, a lockstitch is used to further reinforce the pattern along its edges, creating a double-strength effect. As a self-locking stitch, the lockstitch creates nested loops that effectively lock the stitch ends at the outline edges, preventing fraying, pilling, or loosening due to subsequent use, washing, or external forces. Especially in structural parts that require hollowing out, suspension, or independent exposure, the edges are often the areas where the stress is most concentrated. The locking pin encryption treatment significantly improves the tensile and tear resistance of these key parts, ensuring that the edges of the three-dimensional structure always maintain a regular and stable shape.

[0077] The combination of flat stitching to outline the shape and lockstitching to encrypt the edges effectively creates a gradient area of ​​intensity at the edge of the pre-designed pattern. The high-density area formed by the lockstitching provides stronger contraction and support during heat pressing, resulting in a clear, raised boundary for the pattern. Meanwhile, the inner area can present a smooth or undulating three-dimensional form according to design requirements. This differentiated design of edge reinforcement and inner softening gives the final product a rich and natural sense of layering—the main pattern is full and three-dimensional, with clear and sharp edges, enhancing the visual impact and artistic expression of the three-dimensional structure.

[0078] For pre-designed patterns featuring intricate openwork, sharp corners, slender cantilevers, or complex curves, conventional embroidery techniques often fail to guarantee edge integrity and structural stability. This application's embodiment effectively solves the technical challenges of edge collapse, deformation, and loosening during the embroidery process for complex structures by precisely defining the outline with flat stitches and reinforcing edge treatment with lock stitches. Sharp corners are further reinforced with denser lock stitches to prevent loosening; slender cantilevers are strengthened at the edges to enhance self-support and prevent sagging and deformation; and openwork areas are clearly defined to ensure regular hole shapes. This meticulous processing ensures a high first-pass yield even for complex designs, significantly reducing rework and scrap due to edge quality issues and improving production efficiency.

[0079] In some embodiments, the hot pressing process is carried out at a preset temperature and a preset pressure. These preset temperatures and pressures are not fixed, universal parameters, but are specifically determined based on the material properties of the sheath layer of the core-sheath structure yarn. Specifically, after transferring the three-dimensional structure from the embroidery template to the hot pressing equipment, a matching hot pressing temperature and pressure range is set according to the thermal performance parameters of the sheath layer material (including melting temperature, melt index, fluidity, thermal decomposition temperature, etc.). This ensures that the sheath material can fully melt and form a strong weld during the hot pressing process, while avoiding material damage or poor welding due to improper parameters.

[0080] In some embodiments, based on the melting point characteristics of the sheath material in the core-sheath structure yarn, the preset temperature can be 130°C-180°C, and the preset pressure can be 0.2-0.8 MPa. It is understood that different sheath materials have different thermophysical properties—for example, the melting temperature of low-melting-point polyester is typically between 110°C and 180°C, the melting temperature of copolyamide may be between 130°C and 200°C, the melting temperature of polypropylene is approximately 160°C-170°C, and the melting temperature of thermoplastic polyurethane may be in the range of 150°C-220°C. Furthermore, the melt flowability, surface tension, and bonding strength with the core layer also vary significantly among different materials. Therefore, the hot-pressing parameters must be specifically set according to the chosen sheath material to achieve the desired welding effect.

[0081] It is important to note that by precisely matching the hot-pressing parameters with the properties of the sheath material, the sheath can be fully melted within the optimal temperature range without overheating and degradation. Simultaneously, under appropriate pressure, it flows uniformly and fills the tiny gaps at the yarn interlacing points, fusing with the sheath of adjacent yarns. When the temperature parameters are precisely within the melting range of the sheath and above its flow temperature, the sheath material achieves its optimal molten state. When the pressure parameters are sufficient to overcome the surface tension of the melt and promote interfacial bonding, a dense and uniform fused structure can be formed at the interlacing points. This parameter matching ensures that each interlacing point forms a reliable weld, avoiding problems such as insufficient welding due to excessively low temperatures, material degradation due to excessively high temperatures, weak bonding due to insufficient pressure, or yarn flattening and deformation due to excessive pressure.

[0082] Precise control of preset temperature and pressure not only affects the quality of the fused structure formation but also directly relates to the final shaping effect of the three-dimensional structure. At a suitable temperature, the outer layer material fully melts and re-solidifies, allowing the surface yarns and core yarns to fuse at the interlacing points. Under suitable pressure, the relative positions of the yarns are precisely fixed, accurately maintaining the geometry of the three-dimensional structure. Especially in areas requiring the maintenance of complex curved surfaces, sharp corners, or suspended structures, appropriate pressure ensures that these features do not collapse or deform during hot pressing. This optimized hot pressing shaping effect endows the product with excellent resistance to deformation and structural stability, enabling it to maintain its designed shape over a long period during subsequent use and cleaning.

[0083] By linking hot-pressing parameters to the properties of the sheath material, this application allows the preparation method to be flexibly adapted to various types of core-sheath structure yarns. Whether it is low-melting-point polyester, copolyamide, polypropylene, polyethylene, or thermoplastic polyurethane, the desired welding effect can be achieved simply by determining the corresponding temperature and pressure parameters through experiments or material databases based on their specific melting characteristics and rheological behavior. This parameter adjustability greatly expands the freedom of material selection, enabling product developers to choose the most suitable core-sheath structure yarn material according to the needs of different application scenarios (such as softness, transparency, temperature resistance, chemical resistance, cost, etc.), without being limited by a fixed hot-pressing process window.

[0084] In some embodiments, the method further includes: placing the heat-pressed product on the worktable of a laser cutting machine and aligning it according to a standard using film. The laser head performs high-speed scanning and cutting along the outer edge of the product or the internal area requiring hollowing out. The high thermal energy of the laser instantly vaporizes the yarn polymer, forming a smooth, burr-free, automatically sealed edge, completely eliminating the yarn fraying problem that may occur with traditional cutting, achieving the final net shape of the product, and obtaining a one-piece embroidered product.

[0085] Example 2 Corresponding to Embodiment 1 above, this application also provides an electroembroidery product, which can be prepared using the electroembroidery product preparation method described in any one of Embodiment 1. Figure 2 and 3 As shown, the embroidery product comprises a two-dimensional basic structure formed by multiple thermoplastic core-sheath structure yarns 100, top yarns 200, and bottom yarns 300. The multiple thermoplastic core-sheath structure yarns 100 are laid out in a preset arrangement on the same plane. This preset arrangement determines the overall outline and yarn density distribution of the product, providing a regular initial structure for subsequent shaping. The top yarns 200 and bottom yarns 300 are embroidered in a straight line along a direction perpendicular to the arrangement of the core-sheath structure yarns 100, fixing the core-sheath structure yarns 100 in a preset position through interlacing and binding, forming a stable two-dimensional basic structure. Specifically, the top yarns 200 and 300 are located on the upper and lower sides of the core-sheath structure yarns 100, respectively, and repeatedly pierce through them in a direction perpendicular to the core-sheath structure yarns 100, tightly binding the core-sheath structure yarns 100 between the loops formed by the top yarns 200 and the bottom yarns 300. This "vertical binding" fixing method effectively prevents the core-sheath structure yarn 100 from shifting during subsequent processing, while also ensuring its parallelism and spacing consistency, providing a uniform and flat process foundation for subsequent three-dimensional molding and hot pressing. The core-sheath structure yarn 100 and the face yarn 200 fuse at the interlacing points to form a fused structure. This fused structure is achieved through subsequent hot pressing: under heating conditions, the sheath material (low-melting-point component) of the core-sheath structure yarn 100 and the face yarn 200 melts, flows, and weaves into each other, solidifying upon cooling to form a strong "weld point." It should be noted that the melting only occurs on a portion of the yarn's thickness surface; only the sheath layer participates in the fusion, while the core layer (high-strength component) remains intact, thus preserving the yarn's original mechanical strength while providing structural stability. This "point-to-point welding" connection method makes the entire two-dimensional basic structure appear as a "semi-flexible mesh structure" on a macroscopic level—it has both rigid nodes to ensure morphological stability and flexible segments to maintain overall flexibility, providing an ideal stress transfer foundation for the subsequent formation of a three-dimensional structure.

[0086] Specifically, the embroidery product is obtained through the following process: First, multiple thermoplastic core-sheath structure yarns are arranged and fixed on an embroidery template according to a preset layout; second, top and bottom threads are used to embroider straight lines perpendicular to the arrangement direction of the core-sheath structure yarns on the embroidery template to form a two-dimensional basic structure; then, embroidery is performed on the two-dimensional basic structure according to a preset pattern to form a three-dimensional structure with preset pattern features; finally, the three-dimensional structure is transferred from the embroidery template to a hot pressing device for hot pressing treatment, so that the outer layer of the core-sheath structure yarns melts and forms a fused structure at the yarn interlacing points. After cooling and solidification, the embroidery product is obtained.

[0087] It should be noted that, unlike conventional embroidery products which must be attached to a base fabric, the embroidery product of this application completely eliminates the dependence on a base fabric, forming a pure embroidery structure that can exist independently. The embroidery product contains no base fabric material as a carrier, eliminating the heaviness and visual obstruction caused by residual base fabric in traditional processes, achieving a truly lightweight and transparent design. The embroidery product uses a core-sheath structure yarn to form a skeletal support system, with the surface threads interwoven and bound to form pattern features, and then heat-pressed to form a permanent fused structure at the yarn interlacing points. This composite structure of "skin layer fusion and core layer support" gives the product excellent shape retention capabilities, enabling it to maintain the three-dimensional features of the design for a long time—whether it's a relief-like raised effect or a smooth curved transition, it can be stably maintained and is not easily deformed by external forces or washing.

[0088] Example 3 This application also provides a shoe upper, which is prepared using the method for preparing an electro-embroidered product as described in any one of Embodiment 1; or, the shoe upper is prepared using the electro-embroidered product as described in the second aspect. In this embodiment, content that is the same as or similar to that in Embodiment 1 or 2 above can be referred to the above description, and will not be repeated here.

[0089] In some embodiments, the shoe upper is manufactured efficiently and precisely through zoned operations and process coordination, enabling the production of bottomless 3D electro-embroidery products. Further reference... Figure 2 As shown, the shoe upper can be divided into a base material layer 1, an embroidered bottom layer 2, and an embroidered top layer 3.

[0090] First, using a special mold, 1200D thermoplastic core-sheath structure yarn 100 is fixed onto the template frame according to a preset arrangement, based on the sparse effect required by the design. The sparse effect refers to the conscious control of the density of the yarn arrangement according to the final product's pattern and transparency requirements—sparse arrangement in areas requiring openwork or lightweight effects, and dense arrangement in areas requiring reinforcement. After fixing the yarn, the template frame is fixed to the embroidery worktable. Then, thermoplastic core-sheath structure yarn is used as the top thread 200, and transparent single yarn as the bottom thread, interwoven horizontally and vertically with the pre-fixed core-sheath structure yarn 100 to form a fixing layer. Specifically, the top thread is embroidered in a straight line perpendicular to the arrangement direction of the core-sheath structure yarn 100, so that the top and bottom threads interweave and bind at the interlacing points to form a mechanical lock, thus fixing the core-sheath structure yarn 100 and constructing a stable and regular two-dimensional basic structure. This two-dimensional basic structure completely replaces the base fabric in traditional electric embroidery, providing a customizable support platform for subsequent multi-color embroidery.

[0091] In the second layer of the electric embroidery process, the pre-designed embroidery file is first imported into the electric embroidery control system. The embroidery file includes at least digital information such as the pattern outline, line direction, stitch variations, and color area divisions. The prepared template with a two-dimensional basic structure is accurately placed on the electric embroidery worktable according to the positioning marks. Based on the embroidery file requirements, the corresponding color of the top thread is selected for threading. The appropriate needle type is chosen based on the top thread specifications, the characteristics of the base material (i.e., the material and density of the base yarn), and the embroidery process requirements. Simultaneously, the tension of the top and bottom threads is adjusted, and a trial embroidery is conducted to confirm a good sewing effect, ensuring even stitches and no skipped stitches or broken threads during the actual embroidery work. This step, through precise machine matching and parameter adjustment, lays the foundation for high-quality embroidery work in the future.

[0092] On the surface layer 3 of the electric embroidery, the electric embroidery machine automatically executes the embroidery program according to the imported embroidery file. First, it completes the bottom layer embroidery according to the embroidery file, that is, embroidering on the two-dimensional basic structure according to the preset pattern, gradually building a three-dimensional structural foundation with three-dimensional features. After completing the embroidery of the current color area, the electric embroidery machine automatically performs the thread cutting action and moves to the starting position of the next color area. When it is necessary to change the embroidery thread color, the operator can manually change the embroidery thread of the corresponding color according to the prompts in the embroidery file; on equipment equipped with an automatic color changing device, the system can automatically complete the color changing operation. The above cycle of embroidery, thread cutting, shifting, and color changing is repeated until all color areas set in the embroidery file are embroidered. Throughout the embroidery process, the electric embroidery machine strictly executes the stitch position, stitch density, pattern outline, line direction, and stitch variation data in the pattern tape instructions with precision, ensuring that the connection between different color areas is natural, the outline is clear, and the layers are distinct. Finally, a complete three-dimensional pattern structure with rich color layers and three-dimensional form is formed on the two-dimensional basic structure.

[0093] Example 4 This application also provides a footwear product, which includes a sole and an upper connected to the sole, the upper comprising the features described in Embodiment 3. In this embodiment, the same or similar content as in Embodiment 3 can be referred to the above description, and will not be repeated here.

[0094] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0095] The technical solution provided by this invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for preparing an embroidery product, characterized in that, The method includes: On the embroidery template, multiple thermoplastic core-shell structure yarns are arranged and fixed according to the preset layout. Using top thread and bottom thread, straight embroidery is performed on the embroidery template, perpendicular to the direction of the yarn arrangement of the core structure, so that the top thread and the bottom thread are interwoven and tied to fix the core structure yarn, forming a two-dimensional basic structure; The two-dimensional basic structure is transferred from the embroidery template to a hot pressing device for hot pressing treatment, so that the outer layer of the core structure yarn melts and forms a fused structure at the yarn interlacing point. After cooling and solidification, the embroidery product is obtained.

2. The method for preparing the embroidery product according to claim 1, characterized in that, The arrangement method includes horizontal or vertical arrangement, and / or the arrangement method and the density of the arrangement are determined according to the embroidery product.

3. The method for preparing the embroidery product according to claim 1, characterized in that, The face yarn is made of the same or compatible yarn as the core-sheath structure yarn; And / or, the bottom line is made of transparent single yarn.

4. The method for preparing the embroidery product according to claim 1, characterized in that, The use of top and bottom threads to perform straight embroidery on the embroidery template, perpendicular to the yarn arrangement direction of the core structure, includes: According to the embroidery file, the top thread and bottom thread are used to perform straight embroidery on the electric embroidery template, perpendicular to the yarn arrangement direction of the core structure. The embroidery file includes at least stitch position and stitch density information.

5. The method for preparing the electro-embroidery product according to any one of claims 1 to 4, characterized in that, After forming the two-dimensional basic structure, the method further includes: Embroidery is performed on the two-dimensional basic structure according to a preset pattern to form a three-dimensional structure with the features of the preset pattern.

6. The method for preparing the embroidery product according to claim 5, characterized in that, The embroidery work performed on the two-dimensional basic structure according to a preset pattern includes: Embroidery is performed on the two-dimensional basic structure according to the embroidery file, and the embroidery file includes at least the pattern outline, line direction and stitch variation data.

7. The method for preparing the embroidery product according to claim 6, characterized in that, The step of embroidering according to the embroidery file on the two-dimensional basic structure according to the preset pattern includes: The outline of the preset pattern is drawn using a flat stitch, and the edge of the preset pattern is encrypted using a lockstitch.

8. The method for preparing the electro-embroidery product according to any one of claims 1 to 4, characterized in that, The hot pressing process is carried out at a preset temperature and a preset pressure, which are determined based on the material properties of the sheath layer of the core-sheath structure yarn.

9. The method for preparing the electro-embroidery product according to any one of claims 1 to 4, characterized in that, The core layer of the core-sheath structure yarn comprises a non-thermoplastic material, and the sheath layer of the core-sheath structure yarn comprises a thermoplastic material.

10. The method for preparing the embroidered product according to claim 9, characterized in that, The core layer of the core-sheath structure yarn includes polyester or nylon, and the sheath layer of the core-sheath structure yarn includes polyester, polyamide, or polyurethane.

11. An embroidery product, characterized in that, The embroidery product includes a two-dimensional basic structure formed by multiple thermoplastic core-shell structure yarns, top yarns, and bottom yarns. The multiple thermoplastic core-shell structure yarns are arranged in a preset layout. The top yarns and bottom yarns are interwoven and bundled to fix the core-shell structure yarns along a direction perpendicular to the layout of the core-shell structure yarns. The core-shell structure yarns and the top yarns are fused together at the interlacing points of the core-shell structure yarns and the top yarns to form a fused structure.

12. The embroidery product according to claim 11, characterized in that, The embroidery product also includes a three-dimensional structure with preset pattern features set on the two-dimensional basic structure.

13. A shoe upper, characterized in that, The shoe upper is prepared using the method for preparing electro-embroidered products as described in any one of claims 1 to 10; Alternatively, the shoe upper may be prepared using the electro-embroidery product as described in claim 11 or 12.

14. A footwear product, characterized in that, The footwear product includes a sole and an upper attached to the sole; The upper includes the upper as described in claim 13.

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