TPU vamp production process and TPU vamp

Abstract

The invention provides a TPU vamp production process and a TPU vamp, and relates to the technical field of vamp production. The TPU vamp production technology comprises the following steps that water-soluble cloth is prepared to serve as a bottom layer substrate, water-soluble lines serve as limiting lines, and TPU lines are used for laying surface layer decoration patterns; tPU threads are laid on the surface layer according to design requirements to form various modeling patterns, and in the laying process, the TPU threads are laid while the TPU threads are fixed to the bottom-layer water-soluble cloth through limiting threads in an electrical embroidery mode; performing hot-pressing shaping on the vamp on which the TPU threads are laid, so that the TPU threads are mutually fixed to form a stable modeling pattern decorative surface; and soaking the hot-pressed and shaped vamp in normal-temperature water to dissolve the water-soluble cloth at the bottom layer and the water-soluble threads of the limiting lines, thereby obtaining the TPU vamp with only the surface layer left. The water-soluble cloth and the water-soluble thread are used as the bottom layer and the limiting thread and can be easily dissolved and removed after the production process is finished, the subsequent treatment process of the vamp is simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shoe upper production, in particular to a TPU shoe upper production process and a TPU shoe upper. Background Art

[0002] Shoes have a long history of development. Shoe production is an important industry in my country's light industry and a component of the clothing industry. According to different shoe materials, shoe products can be divided into: leather shoes, cloth shoes, rubber shoes, rubber shoes, etc. According to the wearer, production process and purpose, there are many ways to classify shoes. Among them, sports shoes refer to the shoes people wear when doing sports. Its broad concept specifically refers to: appropriate sports, fitness sports, leisure sports, entertainment sports and professional competitive sports training process and formal competition sports used in shoes.

[0003] At present, when the shoe industry is manufacturing uppers, the traditional upper manufacturing process often has many problems. For example, the decorative layer of some uppers is difficult to separate from the substrate layer, which affects the subsequent processing and performance of the uppers. Moreover, when making uppers with decorative patterns, the process is complicated and the cost is high, which is difficult to meet the production requirements of high efficiency, environmental protection and low cost. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a TPU upper production process and a TPU upper, which solve the problems raised by the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A TPU upper production process comprises the following steps:

[0008] Step 1: Prepare the ingredients:

[0009] Prepare water-soluble cloth as the bottom substrate, water-soluble thread as the limit line, and TPU thread for laying the surface decorative pattern;

[0010] Step 2: Surface laying and fixing:

[0011] The TPU thread is laid on the surface layer into various shapes and patterns according to the design requirements. During the laying process, the TPU thread is fixed on the bottom water-soluble fabric through the limit line by electric embroidery while laying the TPU thread;

[0012] Step 3: Heat pressing and shaping:

[0013] The shoe upper with TPU thread laid is heat-pressed to fix the TPU threads to each other to form a stable decorative surface with a pattern;

[0014] Step 4: Dissolve the bottom layer and limit lines:

[0015] The shoe upper after heat pressing is soaked in water at room temperature to dissolve the bottom water-soluble cloth and the limit line water-soluble line, thereby obtaining a TPU shoe upper with only the surface layer left.

[0016] Preferably, in step one, the TPU wire is a two-component TPU wire, which is a core-spun yarn, with a high-temperature TPU wire in the middle and a low-temperature TPU wire wrapped outside.

[0017] Preferably, in step three, the low-temperature TPU wire is melted and fixed, and the internal high-temperature TPU wire does not melt.

[0018] Preferably, in step 2, the electric embroidery adopts a special electric embroidery technology, which can ensure that the TPU thread is evenly and firmly fixed on the water-soluble cloth during the laying process, while maintaining the clarity of the pattern and the overall aesthetics. This electric embroidery technology includes using specific electric embroidery threads and electric embroidery needles, and accurately controlling the operating parameters of the electric embroidery machine, such as needle speed, tension and embroidery density, to adapt to the characteristics of the TPU material. In this way, the TPU thread will not be deformed or damaged due to high temperature during the electric embroidery process, ensuring the decorative effect and quality of the upper.

[0019] Preferably, the needle speed of the electric embroidery needle is 1000-1500r / min, the tension of the electric embroidery needle is 30-50 grams, and the embroidery density of the electric embroidery needle is 100-200 needles / cm 2 .

[0020] Preferably, in step 3, the hot pressing and high-frequency discharge are used. Specifically, the hot pressing temperature of the hot pressing and high-frequency discharge is 120-160°C, and the high-frequency discharge power of the hot pressing and high-frequency discharge is 500-1000W, so as to ensure that the TPU lines can be fully fused and avoid excessive thermal damage to the TPU material. By precisely controlling the parameters of hot pressing and high-frequency discharge, a TPU upper with uniform texture and good elasticity can be obtained.

[0021] Preferably, in step 4, the soaking time does not exceed 5 minutes.

[0022] The present invention further discloses a TPU shoe upper, which is based on the TPU shoe upper production process as described above and includes a bottom layer, a surface layer and a limiting line, wherein the surface layer is woven on the bottom layer by electric embroidery through the limiting line.

[0023] (III) Beneficial effects

[0024] The present invention provides a TPU shoe upper production process and a TPU shoe upper, which have the following beneficial effects:

[0025] 1. Water-soluble cloth and water-soluble thread are used as the bottom layer and limit line, which can be easily dissolved and removed after the production process is completed, simplifying the subsequent processing process of the upper and improving production efficiency.

[0026] 2. Through the electric embroidery and hot pressing shaping process, TPU shoe upper decorative surfaces with various shapes and patterns can be accurately produced, and the material characteristics of TPU thread make the shoe upper have good flexibility, wear resistance and waterproofness.

[0027] 3. The use of two-component TPU thread further optimizes the performance of the upper, while ensuring the pattern fixing effect, it also improves the overall strength of the upper. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the production process of the present invention;

[0029] Figure 2 It is a schematic diagram of the decorative surface with a modeling pattern of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] like Figure 1 As shown, an embodiment of the present invention provides a TPU shoe upper production process, comprising the following steps:

[0033] Step 1: Prepare the ingredients:

[0034] Prepare water-soluble cloth as the bottom substrate, water-soluble thread as the limiting thread, and TPU thread for laying the surface decorative pattern; among them, the TPU thread adopts two-component TPU thread, which is core-spun yarn, with high-temperature TPU thread in the middle and low-temperature TPU thread wrapped on the outside.

[0035] Step 2: Surface laying and fixing:

[0036] The TPU thread is laid on the surface layer into various shapes and patterns according to the design requirements. During the laying process, the TPU thread is fixed to the bottom water-soluble fabric through the limit line by electric embroidery. Among them, the electric embroidery adopts a special electric embroidery technology, which can ensure that the TPU thread is evenly and firmly fixed on the water-soluble fabric during the laying process, while maintaining the clarity of the pattern and the overall aesthetics. This electric embroidery technology includes the use of specific electric embroidery threads and electric embroidery needles, as well as precise control of the operating parameters of the electric embroidery machine, such as needle speed, tension and embroidery density. Specifically, the needle speed of the electric embroidery needle is 1000r / min, the tension of the electric embroidery needle is 30 grams, and the embroidery density of the electric embroidery needle is 100 needles / cm 2 , to adapt to the characteristics of TPU materials. In this way, the TPU thread will not be deformed or damaged due to high temperature during the electric embroidery process, ensuring the decorative effect and quality of the upper.

[0037] Step 3: Heat pressing and shaping:

[0038] The upper with the TPU line laid is hot pressed to shape, wherein the low-temperature TPU line is melted and fixed, and the internal high-temperature TPU line does not melt. Secondly, the hot pressing and high-frequency discharge method is adopted. Specifically, the hot pressing temperature of the hot pressing and shaping is 120°C, and the high-frequency discharge power of the hot pressing and shaping is 500W, to ensure that the TPU lines can be fully fused and avoid excessive thermal damage to the TPU material. By precisely controlling the parameters of hot pressing and high-frequency discharge, a TPU upper with uniform texture and good elasticity can be obtained, so that the TPU lines are fixed to each other to form a stable decorative surface with a pattern.

[0039] Step 4: Dissolve the bottom layer and limit lines:

[0040] The heat-pressed upper is soaked in water at room temperature for 3 minutes to dissolve the bottom water-soluble cloth and the limit line water-soluble line, thereby obtaining a TPU upper with only the surface layer left.

[0041] An embodiment of the present invention further provides a TPU upper, based on a TPU upper production process as described above, comprising a bottom layer, a surface layer and a limiting line, wherein the surface layer is woven on the bottom layer by electric embroidery through the limiting line.

[0042] Embodiment 2:

[0043] like Figure 1 As shown, an embodiment of the present invention provides a TPU shoe upper production process, comprising the following steps:

[0044] Step 1: Prepare the ingredients:

[0045] Prepare water-soluble cloth as the bottom substrate, water-soluble thread as the limiting thread, and TPU thread for laying the surface decorative pattern; among them, the TPU thread adopts two-component TPU thread, which is core-spun yarn, with high-temperature TPU thread in the middle and low-temperature TPU thread wrapped on the outside.

[0046] Step 2: Surface laying and fixing:

[0047] The TPU thread is laid on the surface layer into various shapes and patterns according to the design requirements. During the laying process, the TPU thread is fixed to the bottom water-soluble fabric through the limit line by electric embroidery. Among them, the electric embroidery adopts a special electric embroidery technology, which can ensure that the TPU thread is evenly and firmly fixed on the water-soluble fabric during the laying process, while maintaining the clarity of the pattern and the overall aesthetics. This electric embroidery technology includes the use of specific electric embroidery threads and electric embroidery needles, as well as precise control of the operating parameters of the electric embroidery machine, such as needle speed, tension and embroidery density. Specifically, the needle speed of the electric embroidery needle is 1300r / min, the tension of the electric embroidery needle is 40 grams, and the embroidery density of the electric embroidery needle is 150 needles / cm 2 , to adapt to the characteristics of TPU materials. In this way, the TPU thread will not be deformed or damaged due to high temperature during the electric embroidery process, ensuring the decorative effect and quality of the upper.

[0048] Step 3: Heat pressing and shaping:

[0049] The upper with the TPU line laid is heat-pressed and shaped, wherein the low-temperature TPU line is melted and fixed, while the internal high-temperature TPU line does not melt. Secondly, the heat-pressing and high-frequency discharge method is adopted. Specifically, the heat-pressing temperature of the heat-pressing and high-frequency discharge is 140°C, and the high-frequency discharge power of the heat-pressing and high-frequency discharge is 800W, to ensure that the TPU lines can be fully fused, while avoiding excessive thermal damage to the TPU material. By precisely controlling the parameters of the heat-pressing and high-frequency discharge, a TPU upper with uniform texture and good elasticity can be obtained, so that the TPU lines are fixed to each other to form a stable decorative surface with a pattern.

[0050] Step 4: Dissolve the bottom layer and limit lines:

[0051] The heat-pressed upper is soaked in water at room temperature for 4 minutes to dissolve the bottom water-soluble cloth and the limit line water-soluble line, thereby obtaining a TPU upper with only the surface layer left.

[0052] An embodiment of the present invention further provides a TPU upper, based on a TPU upper production process as described above, comprising a bottom layer, a surface layer and a limiting line, wherein the surface layer is woven on the bottom layer by electric embroidery through the limiting line.

[0053] Embodiment three:

[0054] like Figure 1As shown, an embodiment of the present invention provides a TPU shoe upper production process, comprising the following steps:

[0055] Step 1: Prepare the ingredients:

[0056] Prepare water-soluble cloth as the bottom substrate, water-soluble thread as the limiting thread, and TPU thread for laying the surface decorative pattern; among them, the TPU thread adopts two-component TPU thread, which is core-spun yarn, with high-temperature TPU thread in the middle and low-temperature TPU thread wrapped on the outside.

[0057] Step 2: Surface laying and fixing:

[0058] The TPU thread is laid on the surface layer into various shapes and patterns according to the design requirements. During the laying process, the TPU thread is fixed to the bottom water-soluble fabric through the limit line by electric embroidery. Among them, the electric embroidery adopts a special electric embroidery technology, which can ensure that the TPU thread is evenly and firmly fixed on the water-soluble fabric during the laying process, while maintaining the clarity of the pattern and the overall aesthetics. This electric embroidery technology includes the use of specific electric embroidery threads and electric embroidery needles, as well as precise control of the operating parameters of the electric embroidery machine, such as needle speed, tension and embroidery density. Specifically, the needle speed of the electric embroidery needle is 1500r / min, the tension of the electric embroidery needle is 50 grams, and the embroidery density of the electric embroidery needle is 200 needles / cm 2 , to adapt to the characteristics of TPU materials. In this way, the TPU thread will not be deformed or damaged due to high temperature during the electric embroidery process, ensuring the decorative effect and quality of the upper.

[0059] Step 3: Heat pressing and shaping:

[0060] The upper with the TPU line is hot-pressed and shaped, wherein the low-temperature TPU line is melted and fixed, while the internal high-temperature TPU line does not melt. Secondly, the hot-pressing and high-frequency discharge method is adopted. Specifically, the hot-pressing temperature of the hot-pressing and shaping is 160°C, and the high-frequency discharge power of the hot-pressing and shaping is 1000W, to ensure that the TPU lines can be fully fused, while avoiding excessive thermal damage to the TPU material. By precisely controlling the parameters of hot-pressing and high-frequency discharge, a TPU upper with uniform texture and good elasticity can be obtained, so that the TPU lines are fixed to each other to form a stable decorative surface with a pattern.

[0061] Step 4: Dissolve the bottom layer and limit lines:

[0062] The shoe upper after heat pressing is soaked in water at room temperature for 5 minutes to dissolve the bottom water-soluble cloth and the limit line water-soluble line, thereby obtaining a TPU shoe upper with only the surface layer left.

[0063] An embodiment of the present invention further provides a TPU upper, based on a TPU upper production process as described above, comprising a bottom layer, a surface layer and a limiting line, wherein the surface layer is woven on the bottom layer by electric embroidery through the limiting line.

[0064] Embodiment 4:

[0065] 1. First, choose a suitable water-soluble fabric as the bottom substrate and cut it into the shape and size required for the upper. At the same time, prepare the water-soluble thread as the limit line and the TPU thread for laying the surface decorative pattern.

[0066] 2. Start laying TPU thread according to the design pattern. Figure 2 As shown, if you want to make a shoe upper decorative surface with a diamond pattern, lay the TPU line section by section into a diamond shape. After each section is laid, use a limiting line to fix it on the bottom water-soluble cloth through electric embroidery to ensure the accurate position of the TPU line.

[0067] 3. After the TPU line is laid, the upper is placed in a hot press for hot pressing and shaping. The hot pressing temperature and high-frequency discharge parameters are set so that the TPU line is firmly fixed together under the action of hot pressing and high-frequency discharge, forming a clear diamond pattern decorative surface.

[0068] 4. Finally, soak the hot-pressed upper in tap water at room temperature. After about 3 minutes of soaking, the bottom water-soluble cloth and the limit line water-soluble thread are completely dissolved, and the upper layer with a diamond pattern consisting only of TPU thread is obtained.

[0069] Embodiment five:

[0070] 1. In the case of using two-component TPU wire, prepare a core-spun TPU wire with a high-temperature TPU wire in the middle and a low-temperature TPU wire wrapped outside.

[0071] 2. Similarly, with the water-soluble fabric as the bottom layer and the water-soluble thread as the limit line, the two-component TPU thread is laid according to the design. During hot pressing and shaping, since the low-temperature TPU thread melts at the set temperature, it can better fix the adjacent TPU threads together, while the internal high-temperature TPU thread does not melt, maintaining the overall structural strength of the TPU thread.

[0072] 3. The subsequent steps of dissolving the bottom layer and the limiting line are the same as those in Example 4, and finally a TPU upper with unique properties is obtained.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A TPU upper production process, characterized in that: The following steps are involved: Step 1: Prepare the ingredients: Prepare water-soluble cloth as the bottom substrate, water-soluble thread as the limit line, and TPU thread for laying the surface decorative pattern; Step 2: Surface laying and fixing: The TPU thread is laid on the surface layer into various shapes and patterns according to the design requirements. During the laying process, the TPU thread is fixed on the bottom water-soluble fabric through the limit line by electric embroidery while laying the TPU thread; Step 3: Heat pressing and shaping: The shoe upper with TPU thread laid is heat-pressed to fix the TPU threads to each other to form a stable decorative surface with a pattern; Step 4: Dissolve the bottom layer and limit lines: The shoe upper after heat pressing is soaked in water at room temperature to dissolve the bottom water-soluble cloth and the limit line water-soluble line, thereby obtaining a TPU shoe upper with only the surface layer left.

2. A TPU shoe upper production process according to claim 1, characterized in that: In step 1, the TPU wire adopts a two-component TPU wire, which is a core-spun yarn, with a high-temperature TPU wire in the middle and a low-temperature TPU wire wrapped outside.

3. A TPU shoe upper production process according to claim 2, characterized in that: In step three, the low-temperature TPU wire is melted and fixed, while the internal high-temperature TPU wire does not melt.

4. A TPU shoe upper production process according to claim 1, characterized in that: In step 2, the electric embroidery technology includes using specific electric embroidery threads and electric embroidery needles, and accurately controlling the operating parameters of the electric embroidery machine, including needle speed, tension and embroidery density.

5. A TPU shoe upper production process according to claim 4, characterized in that: The needle speed of the electric embroidery needle is 1000-1500r / min, the tension of the electric embroidery needle is 30-50 grams, and the embroidery density of the electric embroidery needle is 100-200 needles / cm 2 .

6. A TPU shoe upper production process according to claim 1, characterized in that: In step three, the hot pressing and shaping is carried out by hot pressing and high frequency discharge. Specifically, the hot pressing temperature of the hot pressing and shaping is 120-160° C., and the high frequency discharge power of the hot pressing and shaping is 500-1000W.

7. A TPU shoe upper production process according to claim 1, characterized in that: In step 4, the soaking time does not exceed 5 minutes.

8. A TPU shoe upper, based on a TPU shoe upper production process according to any one of claims 1 to 7, characterized in that: The invention comprises a bottom layer, a surface layer and a limiting line, wherein the surface layer is woven on the bottom layer by means of electric embroidery through the limiting line.

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