Method for manufacturing photochromic TPU vamp and the vamp thereof

Abstract

The application relates to the technical field of vamp manufacturing, in particular to a photochromic TPU knitted vamp manufacturing method and a vamp thereof. The manufacturing method comprises the following steps: S1, manufacturing photochromic TPU yarn; S2, vamp manufacturing; and S3, hot-press forming. The photochromic TPU yarn is obtained by mixing photochromic raw materials and TPU raw materials, the photochromic TPU yarn is controlled to generate a required pattern on an aluminum plate, and the pattern is transferred to the vamp, so that the vamp can present a pattern which changes with the intensity of light, and a TPU layer for protecting and stabilizing the pattern is additionally arranged on the upper layer or the lower layer of the pattern, so that the pattern in the vamp is more stable. The vamp manufactured in this way has good temperature resistance and sun resistance, is higher in color intensity and better in color concentration than a traditional vamp manufactured through chemical dyes, and has high flexibility and strong plasticity of the pattern, and is green and degradable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vamp manufacturing, and particularly relates to a photochromic TPU vamp manufacturing method and a vamp. BACKGROUND

[0002] With the development of outdoor sports, people have higher and higher requirements for sports shoes. Consumers expect sports shoes to have good basic comfort, wear resistance and abrasion resistance, and also have brilliant colors. Therefore, the development of color-changing fabrics has a very broad prospect. However, the color-changing fabric products on the market usually use dyes or chemical dyes to modify and finish the yarn, so as to obtain good color-changing effect on the surface of the yarn. However, the color fastness is poor, the yarn is not resistant to sunlight, the transparency and strength of the yarn are reduced, and other shortcomings have always been a difficult problem for the industry.

[0003] TPU is a material between rubber and plastic, which has a unique molecular structure and excellent mechanical properties, high elasticity, good wear resistance and high strength. Since it has good comfort, light weight, good extension, convenient processing and environmental protection, it is widely used in shoe materials and has good development prospects. Therefore, realizing the photochromic effect on TPU yarn can also meet the needs of consumers. SUMMARY

[0004] Other features and advantages of the present application will be set forth in the following specification, and in part will become apparent to those skilled in the art upon examination of the specification or can be learned by practice of the application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the specification as well as in the other accompanying drawings.

[0005] The present application aims to overcome the above-mentioned deficiencies, and provides a photochromic TPU vamp manufacturing method and a vamp. The photochromic TPU yarn is obtained by mixing photochromic raw materials and TPU raw materials, fluorine paint with polytetrafluoroethylene as a base resin is sprayed on an aluminum plate, the photochromic TPU yarn is controlled to form a required pattern on the aluminum plate, and the pattern is transferred to the vamp, so that the vamp can present a pattern that changes with the intensity of light. The upper layer or lower layer of the pattern is additionally provided with a TPU layer for protecting and stabilizing the pattern, so that the pattern in the vamp is more stable. The vamp made in this way has good temperature resistance and sunlight resistance, higher color intensity and better color concentration than traditional vamps made by chemical dyes. In addition, the pattern is made of yarn, so the pattern has high flexibility and good plasticity, and is green and degradable.

[0006] The present application provides a photochromic TPU vamp manufacturing method, which comprises the following steps:

[0007] S1, making photochromic TPU yarn: put the TPU raw material into a vacuum drum dryer, mix it with photochromic material after taking it out, pour it into a high-speed mixer, melt blend and extrude it with a twin-screw extruder, cool it with a cooling device, form a photochromic TPU raw material, and then process it into a photochromic TPU yarn;

[0008] S2, making the upper: spray fluorine paint with polytetrafluoroethylene as the base resin on the aluminum plate, control the photochromic TPU yarn to form the desired pattern on the aluminum plate, the first layer and the second layer of the upper are both high-transmission TPU materials, cover the aluminum plate with the photochromic TPU yarn on the second layer of high-transmission TPU material, transfer the photochromic TPU yarn on the aluminum plate to the upper, and form a photochromic TPU pattern layer;

[0009] S3, hot pressing: hot press the upper and lower sides of the upper, make the layers of the upper fully bond, and form a finished photochromic TPU upper after cooling.

[0010] In some embodiments, in step S1, the photochromic TPU raw material is processed into photochromic TPU masterbatch by a pelletizing device, and single-component spinning is performed by a spinning machine to obtain a single-component photochromic TPU yarn.

[0011] In some embodiments, in step S2, after the single-component photochromic TPU yarn forms the desired pattern on the aluminum plate, it is transferred to the upper, and a layer of high-transmission TPU material is covered on the upper.

[0012] In some embodiments, in step S1, the photochromic TPU raw material is processed into photochromic TPU masterbatch by a pelletizing device, and the TPU raw material with a moisture content of less than 80ppm is put into a spinning machine together to form the photochromic TPU yarn with a skin-core structure.

[0013] In some embodiments, in step S1, the temperature of the vacuum drum dryer is 80-120℃, and the drying time is 8-24h.

[0014] In some embodiments, in step S1, the TPU raw material is mixed with the photochromic material, and the proportion of the photochromic material accounts for 5-20% of the total mass of the mixed material.

[0015] In some embodiments, in step S3, the hot pressing temperature of the upper layer is 120℃, the hot pressing temperature of the lower layer is 160℃, the pressure is 100kg / cm2, and the hot pressing time is 20-30s.

[0016] In some embodiments, in the S3 step, the heat pressing temperature of the upper layer of the vamp is 140 DEG C, the heat pressing temperature of the lower layer of the vamp is 180 DEG C, the pressure is 100 kg / cm2, and the heat pressing time is 20-30 s.

[0017] A photochromic TPU vamp includes a first high-transparency TPU protective layer, a first high-transparency TPU stabilizing layer, a photochromic TPU pattern layer, and a second high-transparency TPU protective layer stacked in sequence, and the first high-transparency TPU protective layer, the first high-transparency TPU stabilizing layer, and the second high-transparency TPU protective layer are all high-transparency TPU materials.

[0018] A photochromic TPU vamp includes a first TPU stabilizing layer, a second TPU stabilizing layer, and a photochromic TPU pattern layer stacked in sequence.

[0019] By adopting the technical scheme, the present application has the following beneficial effects:

[0020] The photochromic TPU yarn is obtained by mixing photochromic raw materials with TPU raw materials, fluorine paint with polytetrafluoroethylene as a base resin is sprayed on an aluminum plate, the photochromic TPU yarn is controlled to form a desired pattern on the aluminum plate, and the pattern is transferred to the vamp, so that the vamp can present a pattern that changes with the intensity of light, and a TPU layer for protecting and stabilizing the pattern is additionally arranged on the upper layer or the lower layer of the pattern, so that the pattern in the vamp is more stable. The vamp made in this way has good temperature resistance and light resistance, higher color intensity and better color density than traditional vamps made by chemical dyes, and the pattern is flexible and has high plasticity and green degradability because it is made of yarn.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure.

[0022] It is obvious that such objects of the present application and other objects will become more apparent in the light of the following detailed description of the preferred embodiments with reference to the attached drawings and drawings.

[0023] In order to make the above and other objects, features and advantages of the present application more apparent, one or more preferred embodiments will be described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used together with embodiments of the present application to explain the present application, and do not constitute a limitation on the present application.

[0025] In the drawings, the same components are designated by the same reference numerals, and the drawings are schematic and are not necessarily drawn according to the actual proportions.

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute one or several embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 The schematic diagram of the vamp structure in the embodiment 1 of the present application;

[0028] Figure 2 The schematic diagram of the vamp structure in the embodiment 3 of the present application.

[0029] Main figure mark explanation: 1, first high-transparency TPU protective layer; 2, first high-transparency TPU stabilizing layer; 3, photochromic TPU pattern layer; 4, first TPU stabilizing layer; 5, second TPU stabilizing layer. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the present application in combination with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application.

[0031] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through a transition structure, but only connects through a connection structure to form an integral whole. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples.

[0034] With reference to Figures 1-2 , Figure 1 The schematic view of the vamp structure in Embodiment 1 of the present application; Figure 2 The schematic view of the vamp structure in Embodiment 3 of the present application.

[0035] According to some embodiments of the present application, the present application provides a photochromic TPU vamp manufacturing method, comprising:

[0036] S1, manufacturing photochromic TPU yarn: placing TPU raw materials into a vacuum drum drying oven for drying, mixing with photochromic materials in proportion after taking out, pouring into a high-speed mixer for high-speed mixing, melt blending and extrusion with a double-screw extruder, cooling and forming with a cooling device, forming photochromic TPU raw materials, and then processing and preparing photochromic TPU yarn;

[0037] S2, vamp manufacturing: spraying fluorine coating material with polytetrafluoroethylene as base resin on an aluminum plate, controlling the photochromic TPU yarn to generate the required pattern on the aluminum plate, the first layer and the second layer of the vamp being high-transparency TPU materials, covering the aluminum plate with the TPU photochromic yarn on the second layer of high-transparency TPU material, transferring the photochromic TPU yarn on the aluminum plate to the vamp, and forming a photochromic TPU pattern layer;

[0038] S3, hot pressing: hot pressing the upper and lower sides of the vamp to make the vamp interlayers fully bonded, and forming a finished product photochromic TPU vamp after cooling.

[0039] According to some embodiments of the present application, optionally, in the S1 step, the photochromic TPU raw material is processed into photochromic TPU master batch through a pelletizing device, and single-component spinning is performed through a spinning machine to obtain single-component photochromic TPU yarn.

[0040] According to some embodiments of the present application, optionally, in the step S2, after the single-component photochromic TPU yarn is formed into a desired pattern on the aluminum plate, it is transferred to the upper and a layer of high-transparency TPU material is coated on the upper.

[0041] According to some embodiments of the present application, optionally, in the step S1, the photochromic TPU raw material is processed into photochromic TPU master batch by a pelletizing device, and is put into a spinning machine together with TPU raw material with moisture less than 80 ppm to form the photochromic TPU yarn with a skin-core structure.

[0042] According to some embodiments of the present application, optionally, in the step S1, the temperature of the vacuum drum drying oven is 80-120℃, and the drying time is 8-24h.

[0043] According to some embodiments of the present application, optionally, in the step S1, the TPU raw material is mixed with the photochromic material, and the proportion of the photochromic material accounts for 5-20% of the total mass of the mixed material.

[0044] According to some embodiments of the present application, optionally, in the step S3, the hot pressing temperature of the upper layer is 120℃, the hot pressing temperature of the lower layer is 160℃, the pressure is 100kg / cm2, and the hot pressing time is 20-30s.

[0045] According to some embodiments of the present application, optionally, the hot pressing temperature of the upper layer is 140℃, the hot pressing temperature of the lower layer is 180℃, the pressure is 100kg / cm2, and the hot pressing time is 20-30s.

[0046] The present application also provides a photochromic TPU upper, which comprises a first high-transparency TPU protective layer 1, a first high-transparency TPU stabilizing layer 3, a photochromic TPU pattern layer 3, and a second high-transparency TPU protective layer 4, which are sequentially stacked, and the first high-transparency TPU protective layer 1, the first high-transparency TPU stabilizing layer 2, and the second high-transparency TPU protective layer 4 are all made of high-transparency TPU material.

[0047] The present application also provides a photochromic TPU upper, which comprises a first TPU stabilizing layer 5, a second TPU stabilizing layer 6, and a photochromic TPU pattern layer 3, which are sequentially stacked.

[0048] Embodiment 1

[0049] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the upper structure in the embodiment 1 of the present application.

[0050] The present embodiment provides a method for manufacturing a photochromic TPU upper, which comprises:

[0051] S1. Production of photochromic TPU yarn: Place TPU raw material in a vacuum drum drying oven to dry, take it out and mix it with photochromic material in proportion, then pour it into a high-speed mixer and mix it evenly at high speed. Use a twin-screw extruder for melt blending and extrusion, and cool it through a cooling device to form photochromic TPU raw material, which is then processed into photochromic TPU yarn.

[0052] The temperature of the vacuum drum drying oven is 80℃, and the drying time is 8 hours. TPU raw material is mixed with photochromic material, and the proportion of photochromic material accounts for 5% of the total mass of the mixed material.

[0053] In step S1, the photochromic TPU raw material is processed into photochromic TPU masterbatch by a pelletizing device, and then spun into single components by a spinning machine to obtain single-component photochromic TPU yarn.

[0054] S2. Upper manufacturing: A fluorine coating with polytetrafluoroethylene as the base resin is sprayed onto an aluminum plate. The photochromic TPU yarn is controlled to generate the desired pattern on the aluminum plate. The first and second layers of the upper are both high-transparency TPU materials. The aluminum plate with TPU photochromic yarn is covered on top of the second high-transparency TPU material. The photochromic TPU yarn on the aluminum plate is transferred to the upper to form a photochromic TPU pattern layer.

[0055] The single-component photochromic TPU yarn is used to generate the desired pattern on an aluminum plate and then transferred to the shoe surface, which is then covered with a layer of highly transparent TPU material.

[0056] S3. Hot pressing: Hot pressing is performed on the upper and lower sides of the shoe upper to fully bond the layers of the shoe upper. After cooling, the finished photochromic TPU shoe upper is formed.

[0057] The upper layer of the shoe upper is heated at 120℃, the lower layer at 160℃, the pressure is 100kg / cm2, and the heating time is 20s.

[0058] This embodiment also provides a photochromic TPU upper, comprising a first high-transparency TPU protective layer 1, a first high-transparency TPU stabilizing layer 3, a photochromic TPU pattern layer 3, and a second high-transparency TPU protective layer 4 stacked sequentially. The first high-transparency TPU protective layer 1, the first high-transparency TPU stabilizing layer 2, and the second high-transparency TPU protective layer 4 are all made of high-transparency TPU material.

[0059] Example 2

[0060] This embodiment provides a method for manufacturing a photochromic TPU shoe upper, including:

[0061] S1. Production of photochromic TPU yarn: Place TPU raw material in a vacuum drum drying oven to dry, take it out and mix it with photochromic material in proportion, then pour it into a high-speed mixer and mix it evenly at high speed. Use a twin-screw extruder for melt blending and extrusion, and cool it through a cooling device to form photochromic TPU raw material, which is then processed into photochromic TPU yarn.

[0062] The temperature of the vacuum drum drying oven is 100℃, and the drying time is 16h. TPU raw material is mixed with photochromic material, and the proportion of photochromic material accounts for 10% of the total mass of the mixed material.

[0063] In step S1, the photochromic TPU raw material is processed into photochromic TPU masterbatch by a pelletizing device, and then spun into single components by a spinning machine to obtain single-component photochromic TPU yarn.

[0064] S2. Upper manufacturing: A fluorine coating with polytetrafluoroethylene as the base resin is sprayed onto an aluminum plate. The photochromic TPU yarn is controlled to generate the desired pattern on the aluminum plate. The first and second layers of the upper are both high-transparency TPU materials. The aluminum plate with TPU photochromic yarn is covered on top of the second high-transparency TPU material. The photochromic TPU yarn on the aluminum plate is transferred to the upper to form a photochromic TPU pattern layer.

[0065] The single-component photochromic TPU yarn is used to generate the desired pattern on an aluminum plate and then transferred to the shoe surface, which is then covered with a layer of highly transparent TPU material.

[0066] S3. Hot pressing: Hot pressing is performed on the upper and lower sides of the shoe upper to fully bond the layers of the shoe upper. After cooling, the finished photochromic TPU shoe upper is formed.

[0067] The upper layer of the shoe upper is heated at 120℃, the lower layer at 160℃, the pressure is 100kg / cm2, and the heating time is 20s.

[0068] This embodiment also provides a photochromic TPU upper, comprising a first high-transparency TPU protective layer 1, a first high-transparency TPU stabilizing layer 3, a photochromic TPU pattern layer 3, and a second high-transparency TPU protective layer 4 stacked sequentially. The first high-transparency TPU protective layer 1, the first high-transparency TPU stabilizing layer 2, and the second high-transparency TPU protective layer 4 are all made of high-transparency TPU material.

[0069] Example 3

[0070] Reference Figure 2 , Figure 2 This is a schematic diagram of the shoe upper structure in Embodiment 3 of the present invention.

[0071] This embodiment provides a method for manufacturing a photochromic TPU shoe upper, including:

[0072] S1. Production of photochromic TPU yarn: Place TPU raw material in a vacuum drum drying oven to dry, take it out and mix it with photochromic material in proportion, then pour it into a high-speed mixer and mix it evenly at high speed. Use a twin-screw extruder for melt blending and extrusion, and cool it through a cooling device to form photochromic TPU raw material, which is then processed into photochromic TPU yarn.

[0073] The temperature of the vacuum drum drying oven is 120℃, and the drying time is 24h. TPU raw material is mixed with photochromic material, and the proportion of photochromic material accounts for 20% of the total mass of the mixed material.

[0074] The photochromic TPU raw material is processed into photochromic TPU masterbatch by a pelletizing device, and then fed into a spinning machine together with TPU raw material with a moisture content of less than 80 ppm to form the photochromic TPU yarn with a core-sheath structure.

[0075] S2. Upper manufacturing: A fluorine coating with polytetrafluoroethylene as the base resin is sprayed onto an aluminum plate. The photochromic TPU yarn is controlled to generate the desired pattern on the aluminum plate. The first and second layers of the upper are both high-transparency TPU materials. The aluminum plate with TPU photochromic yarn is covered on top of the second high-transparency TPU material. The photochromic TPU yarn on the aluminum plate is transferred to the upper to form a photochromic TPU pattern layer.

[0076] The single-component photochromic TPU yarn is used to generate the desired pattern on an aluminum plate and then transferred to the shoe surface, which is then covered with a layer of highly transparent TPU material.

[0077] S3. Hot pressing: Hot pressing is performed on the upper and lower sides of the shoe upper to fully bond the layers of the shoe upper. After cooling, the finished photochromic TPU shoe upper is formed.

[0078] The upper layer of the shoe upper is heated at 140℃, the lower layer is heated at 180℃, the pressure is 100kg / cm2, and the heating time is 20-30s. After heating, the photochromic TPU yarn melts to form a photochromic TPU pattern layer 3.

[0079] This embodiment also provides a photochromic TPU upper, comprising a first TPU stabilizing layer 5, a second TPU stabilizing layer 6, and a photochromic TPU pattern layer 3 stacked sequentially.

[0080] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0081] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0082] Furthermore, the described features or characteristics can be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented without the aforementioned specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A method for manufacturing a photochromic TPU shoe upper, characterized in that, include S1. Production of photochromic TPU yarn: Place TPU raw material in a vacuum drum drying oven to dry, take it out and mix it with photochromic material in proportion, then pour it into a high-speed mixer and mix it evenly at high speed. Use a twin-screw extruder for melt blending and extrusion, and cool it through a cooling device to form photochromic TPU raw material, which is then processed into photochromic TPU yarn. S2. Upper manufacturing: A fluorine coating with polytetrafluoroethylene as the base resin is sprayed onto an aluminum plate to control the photochromic TPU yarn to generate the desired pattern on the aluminum plate. The first and second layers of the upper are both high-transparency TPU materials. The aluminum plate with TPU photochromic yarn is covered on top of the second high-transparency TPU material. The photochromic TPU yarn on the aluminum plate is transferred to the upper to form a photochromic TPU pattern layer. S3. Hot pressing: Hot pressing is performed on the upper and lower sides of the shoe upper to fully bond the layers of the shoe upper. After cooling, the finished photochromic TPU shoe upper is formed.

2. The method for manufacturing photochromic TPU shoe uppers according to claim 1, characterized in that, In step S1, the photochromic TPU raw material is processed into photochromic TPU masterbatch by a pelletizing device, and then spun into single components by a spinning machine to obtain single-component photochromic TPU yarn.

3. The method for manufacturing photochromic TPU shoe uppers according to claim 2, characterized in that, In step S2, the single-component photochromic TPU yarn is transferred to the shoe upper after the desired pattern is generated on the aluminum plate, and then a layer of high-transparency TPU material is covered on the shoe upper.

4. The method for manufacturing photochromic TPU shoe uppers according to claim 1, characterized in that, In step S1, the photochromic TPU raw material is processed by a pelletizing device to form photochromic TPU masterbatch, which is then fed into a spinning machine together with TPU raw material with a moisture content of less than 80 ppm to form the photochromic TPU yarn with a core-sheath structure.

5. The method for manufacturing photochromic TPU shoe uppers according to claim 1, characterized in that, In step S1, the temperature of the vacuum drum drying oven is 80-120℃, and the drying time is 8-24h.

6. The method for manufacturing photochromic TPU shoe uppers according to claim 1, characterized in that, In step S1, TPU raw material is mixed with photochromic material, with the proportion of photochromic material accounting for 5-20% of the total mass of the mixed material.

7. The method for manufacturing photochromic TPU shoe uppers according to claim 3, characterized in that, In step S3, the hot-pressing temperature of the upper layer of the shoe upper is 120℃, the hot-pressing temperature of the lower layer of the shoe upper is 160℃, and the pressure is 100 kg / cm². 2 The hot pressing time is 20-30 seconds.

8. The method for manufacturing photochromic TPU shoe uppers according to claim 4, characterized in that, In step S3, the hot-pressing temperature of the upper layer of the shoe upper is 140℃, the hot-pressing temperature of the lower layer of the shoe upper is 180℃, and the pressure is 100 kg / cm². 2 The hot pressing time is 20-30 seconds.

9. A photochromic TPU upper manufactured using the method described in any one of claims 1-8, characterized in that, It includes a first TPU stabilizing layer, a second TPU stabilizing layer, and a photochromic TPU pattern layer stacked sequentially.

10. A photochromic TPU upper manufactured using the method described in any one of claims 1-8, characterized in that, It includes a first TPU protective layer, a first TPU stabilizing layer, a photochromic TPU pattern layer, and a second TPU protective layer stacked in sequence, wherein the first TPU protective layer, the first TPU stabilizing layer, and the second TPU protective layer are all made of TPU material.

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