Method of manufacturing a high performance string reinforced shoe upper

Abstract

The application provides a manufacturing method of a high-performance string reinforced shoe upper, comprising the following steps: step one, material preparation; step two, upper layer forming; step three, rear-heel reinforcing string yarn and side reinforcing yarn sewing; step four, inner layer forming; step five, shoe upper synthesis; and step six, checking the fastening strength of the inner layer and the upper layer, obtaining a finished shoe upper and collecting the finished shoe upper into a warehouse.

Description

Technical Field

[0001] This invention relates to the field of footwear technology, and more specifically to a method for manufacturing a high-performance string-reinforced footwear upper. Background Technology

[0002] Shoes are a type of clothing accessory whose function is to protect and cover the user's feet. They are basically composed of a sole and an upper. The sole is the lower part that contacts the ground, while the upper is the upper part that is located on top of the sole. The upper covers the user's foot and connects with the sole to fix the sole to the user's foot, preventing the sole from falling off. The design of the upper can effectively improve the integration of the shoe and foot, and make the shoe more protective of the foot and provide better warmth.

[0003] While the aforementioned existing technologies can solve the corresponding technical problems, they still have certain shortcomings: in basketball shoe applications, the upper needs to withstand the frequent, multi-directional explosive movements of the foot during basketball. The user's foot often applies forces from different directions to the shoe, thus requiring the upper to have high resistance to deformation to effectively support the foot and prevent lateral tilt. To improve resistance to deformation, high-strength yarns are typically used and high-density weaving methods are employed to form the upper. However, this approach often results in poor breathability and a relatively stiff texture, thus affecting wearing comfort. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a method for manufacturing high-performance string-reinforced shoe uppers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for manufacturing a high-performance chord-reinforced shoe upper, comprising the following steps: Step 1: Prepare materials, prepare tensile yarn, wind up the tensile yarn for later use, select the tensile yarn as the forming yarn for the upper part, prepare the heel reinforcement yarn and the side reinforcement yarn, wind up the heel reinforcement yarn and the side reinforcement yarn for later use, and the heel reinforcement yarn and the side reinforcement yarn are both support yarns. Step 2: Top layer forming. Select tensile yarn and use a loom with a twisting process to weave the tensile fabric used for the top layer. Then, put the fabric into a mold with the same shape as the shoe upper and fix the tensile fabric with the mold. Cut and form the top layer. Step 3: Sew the heel reinforcement yarn and side reinforcement yarn. Take the heel reinforcement yarn and sew it to the upper heel position with TPU yarn at intervals of 1mm-1.5mm. Take the side reinforcement yarn and sew one end of the side reinforcement yarn from one side edge of the upper layer with TPU yarn, and then wrap it around the corresponding position of the forefoot of the upper layer and extend the other end to the other edge of the upper layer. Sew multiple side reinforcement yarns with each yarn spaced 2mm-2.5mm apart. Step 4: Inner lining layer forming. Soft fabric for the inner lining layer is formed by knitting soft fabric with nylon yarn using a knitting machine. The soft fabric is then placed into a mold with the same shape as the shoe upper and fixed by the mold. The soft fabric is then cut to form the inner lining layer. Finally, multiple horizontally distributed friction yarns are sewn into the heel of the inner lining layer. Step 5: Synthesize the upper. Place the inner layer into a hot press mold and apply adhesive to the lower surface of the upper layer. Lay the upper layer on the upper surface of the inner layer, close the mold, and hot press to bond the upper layer and the inner layer. Then sew the edges of the upper layer and the inner layer together to make them firmly connected. Step Six: Check the connection between the inner layer and the outer layer, obtain the finished shoe upper, and collect it into the warehouse.

[0006] A further improvement is that the preparation of the tensile yarn includes the following steps: S1: Raw material selection: aramid 1414 with a fineness of 200D-400D is selected as the core layer, and nylon 66 with a fineness of approximately 70D-150D is selected as the outer layer yarn. S2: Pretreatment, desizing the core layer and applying micro-twist, 50-100 twists / meter, in the direction of S twist. Depending on the requirements, the outer layer yarn can be kept untwisted or strongly twisted. Strong twist can increase the elasticity of the yarn, but will slightly reduce the tensile strength. S3: The first layer of coating adopts reverse coating. A hollow spindle coating machine is used to pass the core layer through the hollow spindle. The first group of nylon 66 filaments is evenly wound on the surface of the aramid core layer in the Z-twist direction with a coating density of 700-1000 twists / meter, so that the core layer is fixed and initially covered. S4: The second layer of wrapping is a forward wrapping process using a hollow spindle wrapping machine. The semi-finished yarn that has passed through the first layer of wrapping enters the second set of hollow spindles. The second set of nylon 66 filaments is in the opposite direction to the first layer, with an S-twist direction, and is wound evenly with a wrapping density of 700-1000 twists / meter. S5: Heat setting. The wrapped yarn is placed in a constant temperature box or heat setting machine at 180℃-200℃ for 30-60 seconds. Nylon 66 will shrink slightly at this temperature, thus tightly binding the aramid core layer and forming a structure where the outer layer yarn is tight and the core layer yarn is loose, which significantly improves the stability of tensile properties and obtains the set yarn. S6: Impregnation. The shaped yarn is passed through an impregnation tank containing water-based polyurethane, followed by drying at 120°C, allowing the adhesive layer to cure in the fiber gaps. This step can bond the core yarn and the sheath yarn into a composite whole, increasing tensile strength by 15%-20% and obtaining cured yarn; S7: The yarn is coated with an antistatic lubricant by a roller, and under balanced tension, it is precisely wound into a cone shape to obtain a tensile yarn.

[0007] A further improvement is that the synthetic upper involves placing the inner layer into a hot press mold, applying an adhesive to the lower surface of the upper layer, laying the upper layer on the upper surface of the inner layer, sealing the mold, and hot pressing to bond the upper layer and the inner layer. Then, the edges of the upper layer and the inner layer are sewn together to make them firmly connected. The upper layer is then covered with a foam layer on both sides of the upper layer, and a hot melt film layer is then fixed at the edge of the foam layer by hot pressing.

[0008] A further improvement is made to the sewing of the heel reinforcement yarn and the side reinforcement yarn. The heel reinforcement yarn is taken and sewn to the upper layer heel position with TPU yarn at intervals of 1mm-1.5mm. The side reinforcement yarn is taken and sewn from one side edge of the upper layer with TPU yarn, and then around to the corresponding position of the forefoot of the upper layer, with its other end extending to the other edge of the upper layer. Multiple side reinforcement yarns are sewn, each spaced 2mm-2.5mm apart. Then, a second heel reinforcement yarn is sewn into the upper layer heel position. The angle between the second heel reinforcement yarn and the heel reinforcement yarn is 60°. After sewing, it forms an anti-deformation mesh composed of multiple prismatic structures.

[0009] A further improvement is made to the sewing of the heel reinforcement yarn and the side reinforcement yarn. The heel reinforcement yarn is taken and sewn to the upper layer heel position at intervals of 1mm-1.5mm with TPU yarn. The side reinforcement yarn is taken and sewn from one side edge of the upper layer with TPU yarn, and then around to the corresponding position of the forefoot of the upper layer, with its other end extending to the other edge of the upper layer. Multiple side reinforcement yarns are sewn, each spaced 2mm-2.5mm apart. Then, a second side reinforcement yarn is sewn into the outer edge of the upper layer side. The second side reinforcement yarn extends obliquely upward and when it touches the inner edge of the upper layer, it is obliquely folded back downward, making it Z-shaped and fixed to the side of the upper layer. It intersects with the side reinforcement yarn to form a side support net composed of several triangles.

[0010] A further improvement is that the preparation of the support yarn includes the following steps: A1: Raw material selection: Three strands of ultra-high molecular weight polyethylene filaments are twisted together to form a yarn roll as the core yarn, and thermoplastic polyurethane (TPU) is selected as the skin material. A2: Spinning. Thermoplastic polyurethane (TPU) chips are fed into a screw extruder and heated to 180℃-220℃ to completely melt the TPU into a viscous flow state. The TPU is then fed into an impregnation tank. The core yarn is straightened and its middle section passes through the impregnation tank, with the surface covered by thermoplastic polyurethane fluid. After passing through a suspended tank, the thermoplastic polyurethane is allowed to solidify slightly. Then, it passes through a through hole with a diameter 0.5mm larger than the core diameter. After the core yarn with thermoplastic polyurethane fluid passes through, the thickness of the thermoplastic polyurethane fluid on its surface is controlled at 0.5mm to obtain a viscous yarn. A3: Heat setting involves passing the viscous yarn through a hot air setting box, where the outer layer material is slightly melted and bonded together, fixing the twist of the three ultra-high molecular weight polyethylene filaments. At the same time, the outer layer material forms a smooth but soft continuous film on the yarn surface, resulting in a semi-finished yarn. A4: Air texturing. The semi-finished yarn is fed into the air texturing nozzle at an overfeed rate of 1.2-1.5 times. Compressed air at a pressure of 6-8 kg / cm² breaks up the filaments in the yarn, forming arcs and network knots of varying sizes. These tiny arcs form an air layer. When the foot touches or bends, the arcs are stretched, resulting in a soft touch. When vigorous exercise generates huge tensile forces, the arcs are straightened, and the high-strength fibers in the core layer begin to bear the force, achieving a soft touch and strong resistance to deformation.

[0011] A further improvement is made to the air deformation process, in which the semi-finished yarn is fed into the air deformation nozzle at an overfeed rate of 1.2-1.5 times. Compressed air at a pressure of 6-8 kg / cm² is used to break up the filaments in the yarn, forming arcs and network knots of varying sizes. These tiny arcs form an air layer. When the foot touches or bends the yarn, the arcs are stretched, resulting in a soft touch. When vigorous exercise generates a huge tensile force, the arcs are straightened, and the high-strength fibers in the core layer begin to bear the force, achieving a soft touch and strong resistance to deformation. The process also includes a softening treatment, in which the yarn is soaked in an organosilicon softener, namely amino-modified silicone oil, to further reduce the coefficient of friction on the yarn surface and eliminate the plastic feel that the high-strength fibers may cause.

[0012] After adopting the above technical solution, the beneficial effects of the present invention are as follows: To enhance the tensile strength and support of the shoe upper, the upper layer is formed using tensile yarn, and reinforced yarns for heel and sides are directionally sewn together. This creates a high-strength chordal reinforcement structure in key stress areas, significantly improving the tensile strength and lateral support of the upper and effectively preventing foot tilting during strenuous exercise.

[0013] Optimizing wearing comfort and feel, the inner lining and friction yarn sewn into the heel enhance fit and slip resistance. The support yarn is formed into arcs and network knots through an air deformation process, giving the yarn a soft touch and forming an air layer when bent, balancing high strength support with a soft feel, solving the problems of stiff texture and poor breathability of traditional high-strength yarn uppers.

[0014] To enhance the structural stability and deformation resistance of the shoe upper, a second heel reinforcement yarn at a 60° angle is sewn into the heel area to form a diamond-shaped deformation-resistant mesh; a second side reinforcement yarn in a Z-shaped direction is sewn into the side area, which intersects with the transverse side reinforcement yarn to form a triangular support mesh, significantly improving the structural stability and deformation resistance of the shoe upper under multi-directional stress.

[0015] To enhance the bonding strength and durability between layers, the upper and inner layers are connected by a combination of hot-press bonding and edge stitching. The hot-melt film layer is also fixed by hot-pressing at the edge of the foam layer, ensuring a strong bond between the layers and improving the overall structural strength and durability of the shoe upper, thus preventing delamination or loosening during use.

[0016] The yarn performance is optimized to enhance overall functionality. The tensile yarn is formed by double-layer reverse wrapping, heat setting and impregnation processes to form a composite structure of "tight outer layer and loose core layer", which significantly improves tensile stability. The support yarn is achieved by heat setting and air deformation processes to express the soft touch of high-strength fiber, which further improves the overall performance of the shoe upper in high-intensity sports scenarios. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the method flow of the present invention; Detailed Implementation

[0019] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0020] See Figure 1 As shown, the technical solution adopted in this specific embodiment is: a method for manufacturing a high-performance chord-reinforced shoe upper, comprising the following steps: Step 1: Prepare materials, prepare tensile yarn, wind up the tensile yarn for later use, select the tensile yarn as the forming yarn for the upper part, prepare the heel reinforcement yarn and the side reinforcement yarn, wind up the heel reinforcement yarn and the side reinforcement yarn for later use, and both the heel reinforcement yarn and the side reinforcement yarn are support yarns. Step 2: Top layer forming. Select tensile yarn and use a loom with a twisting process to weave the tensile fabric used for the top layer. Then, put the fabric into a mold with the same shape as the shoe upper and fix the tensile fabric with the mold. Cut and form the top layer. Step 3: Sew the heel reinforcement yarn and side reinforcement yarn. Take the heel reinforcement yarn and sew it to the upper heel position with TPU yarn at intervals of 1mm-1.5mm. Take the side reinforcement yarn and sew one end of the side reinforcement yarn from one side edge of the upper layer with TPU yarn, and then wrap it around the corresponding position of the forefoot of the upper layer and extend the other end to the other edge of the upper layer. Sew multiple side reinforcement yarns with each yarn spaced 2mm-2.5mm apart. Step 4: Inner lining layer forming. Soft fabric for the inner lining layer is formed by knitting soft fabric with nylon yarn using a knitting machine. The soft fabric is then placed into a mold with the same shape as the shoe upper and fixed by the mold. The soft fabric is then cut to form the inner lining layer. Finally, multiple horizontally distributed friction yarns are sewn into the heel of the inner lining layer. Step 5: Synthesize the upper. Place the inner layer into a hot press mold and apply adhesive to the lower surface of the upper layer. Lay the upper layer on the upper surface of the inner layer, close the mold, and hot press to bond the upper layer and the inner layer. Then sew the edges of the upper layer and the inner layer together to make them firmly connected. Step Six: Check the connection between the inner layer and the outer layer, obtain the finished shoe upper, and collect it into the warehouse.

[0021] The preparation of tensile-resistant yarn includes the following steps: S1: Raw material selection: aramid 1414 with a fineness of 200D-400D is selected as the core layer, and nylon 66 with a fineness of approximately 70D-150D is selected as the outer layer yarn. S2: Pretreatment, desizing the core layer and applying micro-twist, 50-100 twists / meter, in the direction of S twist. Depending on the requirements, the outer layer yarn can be kept untwisted or strongly twisted. Strong twist can increase the elasticity of the yarn, but will slightly reduce the tensile strength. S3: The first layer of coating adopts reverse coating. A hollow spindle coating machine is used to pass the core layer through the hollow spindle. The first group of nylon 66 filaments is evenly wound on the surface of the aramid core layer in the Z-twist direction with a coating density of 700-1000 twists / meter, so that the core layer is fixed and initially covered. S4: The second layer of wrapping is a forward wrapping process using a hollow spindle wrapping machine. The semi-finished yarn that has passed through the first layer of wrapping enters the second set of hollow spindles. The second set of nylon 66 filaments is in the opposite direction to the first layer, with an S-twist direction, and is wound evenly with a wrapping density of 700-1000 twists / meter. S5: Heat setting. The wrapped yarn is placed in a constant temperature box or heat setting machine at 180℃-200℃ for 30-60 seconds. Nylon 66 will shrink slightly at this temperature, thus tightly binding the aramid core layer and forming a structure where the outer layer yarn is tight and the core layer yarn is loose, which significantly improves the stability of tensile properties and obtains the set yarn. S6: Impregnation. The shaped yarn is passed through an impregnation tank containing water-based polyurethane, followed by drying at 120°C, allowing the adhesive layer to cure in the fiber gaps. This step can bond the core yarn and the sheath yarn into a composite whole, increasing tensile strength by 15%-20% and obtaining cured yarn; S7: The yarn is coated with an antistatic lubricant by a roller, and under balanced tension, it is precisely wound into a cone shape to obtain a tensile yarn.

[0022] The synthetic upper is made by placing the inner layer into a hot press mold, applying adhesive to the lower surface of the upper layer, laying the upper layer on the upper surface of the inner layer, sealing the mold, and hot pressing to bond the upper and inner layers together. Then, the edges of the upper and inner layers are sewn together to secure the connection. Afterward, foam layers are covered on both sides of the upper layer, and a hot melt film layer is then fixed to the edges of the foam layers by hot pressing. The foam layers improve the impact resistance of the upper, while the hot melt film layer further enhances the strength of the upper and prevents the foam layers from cracking at the edges, thus increasing the service life.

[0023] The heel reinforcement yarn and side reinforcement yarn are sewn together. The heel reinforcement yarn is taken and sewn to the upper heel position with TPU yarn at intervals of 1mm-1.5mm. The side reinforcement yarn is taken and sewn together with TPU yarn from one side edge of the upper layer. It then passes over the corresponding position of the forefoot of the upper layer and extends to the other edge of the upper layer. Multiple side reinforcement yarns are sewn, each spaced 2mm-2.5mm apart. Then, a second heel reinforcement yarn is sewn into the upper heel position. The angle between the second heel reinforcement yarn and the heel reinforcement yarn is 60°. After sewing, it forms a deformation-resistant mesh composed of multiple diamond structures, which significantly improves the firmness and deformation resistance of the heel position of the shoe upper. The structure is more stable and less prone to sports injuries when worn.

[0024] The heel reinforcement yarn and side reinforcement yarn are sewn together. The heel reinforcement yarn is taken and sewn to the upper heel position with TPU yarn at intervals of 1mm-1.5mm. The side reinforcement yarn is taken and sewn together with TPU yarn from one side edge of the upper layer. It then passes around to the corresponding position of the forefoot of the upper layer and extends to the other edge of the upper layer. Multiple side reinforcement yarns are sewn together, each spaced 2mm-2.5mm apart. Then, a second side reinforcement yarn is sewn into the outer edge of the upper layer side. The second side reinforcement yarn extends obliquely upward and folds back obliquely when it touches the inner edge of the upper layer, so that it is fixed to the side of the upper layer in a Z shape. It intersects with the side reinforcement yarn to form a side support mesh composed of several triangles, which significantly improves the structural stability and deformation resistance of the shoe upper side under multi-directional force.

[0025] The preparation of the support yarn includes the following steps: A1: Raw material selection: Three strands of ultra-high molecular weight polyethylene filaments are twisted together to form a yarn roll as the core yarn, and thermoplastic polyurethane (TPU) is selected as the skin material. A2: Spinning. Thermoplastic polyurethane (TPU) chips are fed into a screw extruder and heated to 180℃-220℃ to completely melt the TPU into a viscous flow state. The TPU is then fed into an impregnation tank. The core yarn is straightened and its middle section passes through the impregnation tank, with the surface covered by thermoplastic polyurethane fluid. After passing through a suspended tank, the thermoplastic polyurethane is allowed to solidify slightly. Then, it passes through a through hole with a diameter 0.5mm larger than the core diameter. After the core yarn with thermoplastic polyurethane fluid passes through, the thickness of the thermoplastic polyurethane fluid on its surface is controlled at 0.5mm to obtain a viscous yarn. A3: Heat setting involves passing the viscous yarn through a hot air setting box, where the outer layer material is slightly melted and bonded together, fixing the twist of the three ultra-high molecular weight polyethylene filaments. At the same time, the outer layer material forms a smooth but soft continuous film on the yarn surface, resulting in a semi-finished yarn. A4: Air texturing. The semi-finished yarn is fed into the air texturing nozzle at an overfeed rate of 1.2-1.5 times. Compressed air at a pressure of 6-8 kg / cm² breaks up the filaments in the yarn, forming arcs and network knots of varying sizes. These tiny arcs form an air layer. When the foot touches or bends, the arcs are stretched, resulting in a soft touch. When vigorous exercise generates huge tensile forces, the arcs are straightened, and the high-strength fibers in the core layer begin to bear the force, achieving a soft touch and strong resistance to deformation.

[0026] Air texturing involves feeding semi-finished yarn into an air texturing nozzle at an overfeed rate of 1.2-1.5 times. Compressed air at a pressure of 6-8 kg / cm² breaks up the filaments in the yarn, forming loops and network knots of varying sizes. These tiny loops form an air layer. When the foot touches or bends the yarn, the loops are stretched, resulting in a soft touch. When vigorous movement generates significant tension, the loops are straightened, and the high-strength fibers in the core layer begin to bear the stress, achieving a soft touch and strong resistance to deformation. Subsequent steps include a softening treatment, in which the yarn is soaked in an organosilicon softener, namely amino-modified silicone oil, to further reduce the coefficient of friction on the yarn surface and eliminate any plastic feel that the high-strength fibers might cause.

[0027] To verify the actual performance of the high-performance string-reinforced upper described in this application, the upper sample prepared in Example 1 was tested using the following test methods, and compared with a commercially available ordinary high-strength woven upper (Comparative Example 1).

[0028] I. Tensile Strength Test According to GB / T 1040.3-2006 standard, samples were cut from the forefoot area and heel area of ​​the shoe, respectively, and tensile tests were performed using a universal testing machine at a tensile speed of 100 mm / min.

[0029]

[0030] Test results show that the tensile strength of the upper in the forefoot and heel areas of this application is significantly better than that of ordinary high-strength woven uppers.

[0031] II. Lateral Support Performance Test To simulate a sudden stop and change of direction in basketball, the shoe upper was fixed to the shoe last, and a progressive load was applied to the side. The load value was recorded when the shoe upper tilted 5°.

[0032]

[0033] III. Breathability Test According to GB / T 5453-1997 standard, the air permeability (mm / s) of the shoe upper fabric was determined using an air permeability tester.

[0034]

[0035] While maintaining high strength, the breathability of the shoe upper in this application is increased by approximately 58.3% compared to the comparison, effectively improving wearing comfort.

[0036] IV. Interlayer peel strength test According to GB / T 532-2008 standard, a peel test was conducted on the bonding strength between the top layer and the inner layer.

[0037]

[0038] This application improves the interlayer bonding strength by approximately 84.6% compared to the comparative example by combining hot-press bonding and edge stitching, effectively preventing delamination problems.

[0039] V. Comparison of Yarn Tensile Properties The tensile strength yarn prepared in this application and ordinary aramid yarn were subjected to single yarn tensile tests.

[0040]

[0041] The tensile yarn of this application, through double-layer coating, heat setting and impregnation processes, has a breaking strength increased by about 15.9% and a significantly improved breaking elongation, thus balancing strength and toughness.

[0042] VI. Support yarn touch test The coefficient of dynamic friction of the supporting yarn surface was measured using a coefficient of friction meter, and 10 testers were organized to conduct blind tests to evaluate the degree of "plasticity" of the yarn (1-5 points, with higher scores indicating weaker plasticity).

[0043]

[0044] After air deformation and softening treatment, the surface friction coefficient of the supporting yarn is significantly reduced, the touch is soft, and the plastic feel is significantly reduced.

[0045] Test conclusion: The uppers prepared by the manufacturing method of the high-performance chord-reinforced upper described in this application are significantly superior to existing ordinary high-strength woven uppers in terms of tensile strength, lateral support performance, breathability, interlayer bonding strength and tactile comfort. They have good comprehensive performance and can meet the multiple requirements of upper support, durability and comfort in high-intensity sports scenarios such as basketball.

[0046] This invention protects the structure of the product; the model numbers of the components are not protected by this invention, as they are common technology. Any component on the market that can achieve the functions described above can be used as an option. Therefore, the model numbers and other parameters of the components are not described in detail in this invention. The contribution of this invention lies in the scientific combination of the various components.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions above are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents. Any aspects not detailed in the present invention are well-known to those skilled in the art.

Claims

1. A method for manufacturing a high-performance chord-reinforced shoe upper, characterized in that: Includes the following steps: Step 1: Prepare materials, prepare tensile yarn, wind up the tensile yarn for later use, select the tensile yarn as the forming yarn for the upper part, prepare the heel reinforcement yarn and the side reinforcement yarn, wind up the heel reinforcement yarn and the side reinforcement yarn for later use, and the heel reinforcement yarn and the side reinforcement yarn are both support yarns. Step 2: Top layer forming. Select tensile yarn and use a loom with a twisting process to weave the tensile fabric used for the top layer. Then, put the fabric into a mold with the same shape as the shoe upper and fix the tensile fabric with the mold. Cut and form the top layer. Step 3: Sew the heel reinforcement yarn and side reinforcement yarn. Take the heel reinforcement yarn and sew it to the upper heel position with TPU yarn at intervals of 1mm-1.5mm. Take the side reinforcement yarn and sew one end of the side reinforcement yarn from one side edge of the upper layer with TPU yarn, and then wrap it around the corresponding position of the forefoot of the upper layer and extend the other end to the other edge of the upper layer. Sew multiple side reinforcement yarns with each yarn spaced 2mm-2.5mm apart. Step 4: Inner lining layer forming. Soft fabric for the inner lining layer is formed by knitting soft fabric with nylon yarn using a knitting machine. The soft fabric is then placed into a mold with the same shape as the shoe upper and fixed by the mold. The soft fabric is then cut to form the inner lining layer. Finally, multiple horizontally distributed friction yarns are sewn into the heel of the inner lining layer. Step 5: Synthesize the upper. Place the inner layer into a hot press mold and apply adhesive to the lower surface of the upper layer. Lay the upper layer on the upper surface of the inner layer, close the mold, and hot press to bond the upper layer and the inner layer. Then sew the edges of the upper layer and the inner layer together to make them firmly connected. Step Six: Check the connection between the inner layer and the outer layer, obtain the finished shoe upper, and collect it into the warehouse.

2. The method for manufacturing a high-performance chord-reinforced shoe upper according to claim 1, characterized in that: The preparation of the tensile-resistant yarn includes the following steps: S1: Raw material selection: aramid 1414 with a fineness of 200D-400D is selected as the core layer, and nylon 66 with a fineness of approximately 70D-150D is selected as the outer layer yarn. S2: Pretreatment, desizing the core layer and applying micro-twist, 50-100 twists / meter, in the direction of S twist. Depending on the requirements, the outer layer yarn can be kept untwisted or strongly twisted. Strong twist can increase the elasticity of the yarn, but will slightly reduce the tensile strength. S3: The first layer of coating adopts reverse coating. A hollow spindle coating machine is used to pass the core layer through the hollow spindle. The first group of nylon 66 filaments is evenly wound on the surface of the aramid core layer in the Z-twist direction with a coating density of 700-1000 twists / meter, so that the core layer is fixed and initially covered. S4: The second layer of wrapping is a forward wrapping process using a hollow spindle wrapping machine. The semi-finished yarn that has passed through the first layer of wrapping enters the second set of hollow spindles. The second set of nylon 66 filaments is in the opposite direction to the first layer, with an S-twist direction, and is wound evenly with a wrapping density of 700-1000 twists / meter. S5: Heat setting. The wrapped yarn is placed in a constant temperature box or heat setting machine at 180℃-200℃ for 30-60 seconds. Nylon 66 will shrink slightly at this temperature, thus tightly binding the aramid core layer and forming a structure where the outer layer yarn is tight and the core layer yarn is loose, which significantly improves the stability of tensile properties and obtains the set yarn. S6: Impregnation. The shaped yarn is passed through an impregnation tank containing water-based polyurethane, followed by drying at 120°C, allowing the adhesive layer to cure in the fiber gaps. This step can bond the core yarn and the sheath yarn into a composite whole, increasing tensile strength by 15%-20% and obtaining cured yarn; S7: The yarn is coated with an antistatic lubricant by a roller, and under balanced tension, it is precisely wound into a cone shape to obtain a tensile yarn.

3. The method for manufacturing a high-performance chord-reinforced shoe upper according to claim 1, characterized in that: The synthetic upper involves placing the inner layer into a hot press mold, applying adhesive to the lower surface of the upper layer, laying the upper layer on the upper surface of the inner layer, sealing the mold, and hot pressing to bond the upper layer and the inner layer. Then, the edges of the upper layer and the inner layer are sewn together to make them firmly connected. The upper layer is then covered with a foam layer on both sides of the upper layer, and a hot melt film layer is then fixed at the edge of the foam layer by hot pressing.

4. The manufacturing method of a high-performance chord-reinforced shoe upper according to claim 1, characterized in that: The heel reinforcement yarn and side reinforcement yarn are sewn together. The heel reinforcement yarn is taken and sewn to the upper layer heel position with TPU yarn at intervals of 1mm-1.5mm. The side reinforcement yarn is taken and sewn together with TPU yarn from one side edge of the upper layer. It then passes around the corresponding position of the forefoot of the upper layer and extends to the other edge of the upper layer. Multiple side reinforcement yarns are sewn together, each spaced 2mm-2.5mm apart. Then, a second heel reinforcement yarn is sewn into the upper layer heel position. The angle between the second heel reinforcement yarn and the heel reinforcement yarn is 60°. After sewing, it forms an anti-deformation mesh composed of multiple prismatic structures.

5. The method for manufacturing a high-performance chord-reinforced shoe upper according to claim 1, characterized in that: The heel reinforcement yarn and side reinforcement yarn are sewn together. The heel reinforcement yarn is taken and sewn to the upper layer heel position with TPU yarn at intervals of 1mm-1.5mm. The side reinforcement yarn is taken and sewn together with TPU yarn from one side edge of the upper layer. It then passes around the corresponding position of the forefoot of the upper layer and extends to the other edge of the upper layer. Multiple side reinforcement yarns are sewn together, each spaced 2mm-2.5mm apart. Then, a second side reinforcement yarn is sewn into the outer edge of the upper layer side. The second side reinforcement yarn extends obliquely upward and folds back obliquely when it touches the inner edge of the upper layer, so that it is fixed to the side of the upper layer in a Z shape and intersects with the side reinforcement yarn to form a side support net composed of several triangles.

6. The method for manufacturing a high-performance chord-reinforced shoe upper according to claim 1, characterized in that: The preparation of the support yarn includes the following steps: A1: Raw material selection: Three strands of ultra-high molecular weight polyethylene filaments are twisted together to form a yarn roll as the core yarn, and thermoplastic polyurethane (TPU) is selected as the skin material. A2: Spinning. Thermoplastic polyurethane (TPU) chips are fed into a screw extruder and heated to 180℃-220℃ to completely melt the TPU into a viscous flow state. The TPU is then fed into an impregnation tank. The core yarn is straightened and its middle section passes through the impregnation tank, with the surface covered by thermoplastic polyurethane fluid. After passing through a suspended tank, the thermoplastic polyurethane is allowed to solidify slightly. Then, it passes through a through hole with a diameter 0.5mm larger than the core diameter. After the core yarn with thermoplastic polyurethane fluid passes through, the thickness of the thermoplastic polyurethane fluid on its surface is controlled at 0.5mm to obtain a viscous yarn. A3: Heat setting involves passing the viscous yarn through a hot air setting box, where the outer layer material is slightly melted and bonded together, fixing the twist of the three ultra-high molecular weight polyethylene filaments. At the same time, the outer layer material forms a smooth but soft continuous film on the yarn surface, resulting in a semi-finished yarn. A4: Air texturing. The semi-finished yarn is fed into the air texturing nozzle at an overfeed rate of 1.2-1.5 times. Compressed air at a pressure of 6-8 kg / cm² breaks up the filaments in the yarn, forming arcs and network knots of varying sizes. These tiny arcs form an air layer. When the foot touches or bends, the arcs are stretched, resulting in a soft touch. When vigorous exercise generates huge tensile forces, the arcs are straightened, and the high-strength fibers in the core layer begin to bear the force, achieving a soft touch and strong resistance to deformation.

7. The method for manufacturing a high-performance chord-reinforced shoe upper according to claim 6, characterized in that: The air deformation process involves feeding the semi-finished yarn into the air deformation nozzle at an overfeed rate of 1.2-1.5 times. Compressed air at a pressure of 6-8 kg / cm² breaks up the filaments in the yarn, forming arcs and network knots of varying sizes. These tiny arcs form an air layer. When the foot touches or bends the yarn, the arcs are stretched, resulting in a soft touch. When vigorous exercise generates a large tensile force, the arcs are straightened, and the high-strength fibers in the core layer begin to bear the force, achieving a soft touch and strong resistance to deformation. The process also includes a softening treatment, in which the yarn is soaked in an organosilicon softener, namely amino-modified silicone oil, to further reduce the coefficient of friction on the yarn surface and eliminate any plastic feel that the high-strength fibers may have.

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