Vamp and preparation method thereof

Abstract

The invention discloses a vamp and a preparation method thereof, the vamp comprises a base fabric, an isolation layer made of a waterproof isolation material is attached to the base fabric, patterns are printed on the isolation layer through an offset printing process to form an offset printing layer, and the method comprises the steps of isolation layer forming, offset printing and baking. According to the step of forming the isolating layer, a base cloth material and an isolating material are tightly attached to the base cloth in the modes of vacuumizing, vacuum film covering and the like, high-temperature adhesion is conducted after the needed shape and structure are formed, three-dimensional bottoming is adopted for offset printing till a certain thickness is formed on the surface of the base cloth, and then common ink is used for printing. According to the process, the isolation material and the offset printing process are combined, the roughness of the offset printing bottom face can be increased, the firmness of an offset printing layer can be enhanced, the use amount of the offset printing material can be reduced, the cost can be reduced, the vamp with the three-dimensional pattern can be manufactured, and the appearance effect of the vamp can be enriched. The diversified requirements of consumers on the appearance of the vamp are met.

Description

Technical Field

[0001] The invention relates to a shoe upper and a preparation method thereof, belonging to the field of shoe upper processing. Background Art

[0002] In modern shoe upper manufacturing processes, traditional flat offset printing technology occupies a dominant position. However, this technology has many shortcomings and needs to be improved. For example, the traditional flat offset printing process usually requires the use of a large amount of offset printing materials to print patterns on flat shoe uppers. This high ink and high glue consumption not only significantly increases production costs, but also causes serious pollution to the environment. The offset printing materials contain a variety of organic solvents and volatile organic compounds. These substances will be released into the air during the printing process, posing a threat to the workshop environment and the health of operators, and also have a significant negative impact on the ecological environment.

[0003] To address these issues, the present invention proposes a shoe upper manufacturing process that first utilizes an isolation and offset printing process on the upper. This reduces the use of offset printing materials, lowers production costs, and is environmentally friendly. It also utilizes surface roughness to enhance the strength of the offset layer. Furthermore, the isolation material imparts a three-dimensional shape to the upper. Combined with the subsequent offset printing process, this allows the creation of uppers with three-dimensional patterns, enriching the appearance and meeting the diverse needs of consumers. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a shoe upper and a preparation method thereof to solve the technical problems that the existing flat offset printing process requires a high amount of offset printing materials, has high production costs, and causes environmental pollution.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solution: a shoe upper, comprising: base fabric; An isolation layer, formed by laminating a waterproof isolation material to a base fabric, and used to isolate the base fabric from the offset layer; The offset printing layer forms a pattern on the isolation layer through an offset printing process.

[0006] Furthermore, the isolation layer is formed by one of the methods of blister forming or vacuum lamination, and is adhered to the base fabric by hot pressing. The isolation layer is made to adhere to the base fabric by blister forming or vacuum lamination, and is adhered to the base fabric by hot pressing after forming the same texture as the base fabric.

[0007] Furthermore, the base fabric is a non-planar mesh fabric, the distance between the highest point and the lowest point of the base fabric is 1>H>0.2mm, and the mesh holes of the mesh fabric have a certain depth to prevent the isolation layer from forming a plane.

[0008] Furthermore, after the isolation layer is adhered to the base fabric, the distances from the highest point and the lowest point of the surface away from the base fabric to the bottom surface are different. This distance is the shortest distance between the highest and lowest points. The isolation layer is non-planar, which facilitates the adhesion of the offset layer during the offset printing process and improves the firmness of the offset layer.

[0009] Furthermore, the isolation material is a film with uniform or non-uniform thickness.

[0010] Furthermore, the thickness of the isolation material is less than 1mm, and the thickness of the isolation material is less than the distance between the highest point and the lowest point of the base fabric. This thickness range is the preferred option. The thickness of the isolation material can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, as long as the thickness is less than 1mm; when the thickness of the isolation layer is less than 1mm, the isolation material is concave at the mesh, occupies a certain position at the mesh, and maintains a non-planar rotation state, which can effectively reduce the amount of water-based glue and ink. The larger the mesh, the more the amount is reduced; and the isolation material can have an insulating effect on the base fabric and the offset layer, which can prevent the offset material from penetrating into the base fabric and reduce material waste; when the thickness range of the isolation layer is greater than 1mm, that is, the thickness of the isolation layer is greater than the distance between the highest point and the lowest point of the base fabric, the isolation layer fills the mesh of the base fabric. Although it can have an insulating effect on the base fabric and the offset layer, the surface tends to be smooth and the firmness of the offset layer is weak.

[0011] Furthermore, the isolation material is one of blister film, TPU film, and coating. This is the preferred option. The specific isolation material is not limited as long as it is waterproof and has a thickness of less than 1mm. The coating refers to a waterproof coating, and the isolation layer is formed by spraying the waterproof material.

[0012] Furthermore, the isolation layer partially covers the base fabric to ensure that the overall air permeability of the upper is not affected.

[0013] Furthermore, the surface of the offset layer has a planar roughness, with an arithmetic average roughness Ra ranging from 2 to 10 μm and a maximum peak-to-valley height Rz ranging from 20 to 50 μm, so as to improve the overall adhesion and firmness of the offset layer and prevent it from falling off.

[0014] Furthermore, the offset printing layer has viscosity and can be adhered to the isolation layer. The water-based glue in the offset printing layer has a certain viscosity and can be adhered to the isolation layer.

[0015] Furthermore, the offset printing layer includes water-based glue and ink. The water-based glue and ink can be used alone, with the ink applied after the water-based glue is primed to the desired height, or they can be mixed and directly printed on the isolation layer to the desired height.

[0016] Furthermore, the thickness of the offset layer is 0.3-3mm, which is the preferred option. Within this range, the upper can maintain normal softness without affecting the feel and use; when the thickness range is greater than 3mm, the upper gradually becomes harder, affecting normal use; when the thickness range is less than 0.3mm, the offset effect is not obvious.

[0017] A method for preparing a shoe upper, comprising: S1. Isolation layer forming: Cover the isolation material on the base fabric and tightly adsorb the isolation material on the base fabric surface by blister forming or vacuum lamination to form the desired shape and structure. Then, the isolation material and the base fabric are bonded at high temperature and cooled to form an isolation layer. S2, offset printing: Positioning lines and color separation are carried out according to the original manuscript. After the screen processing is completed, water-based glue is used for three-dimensional primer and low-temperature baking and curing until a certain thickness is formed on the surface of the base fabric. Ordinary ink is used for printing. By combining the isolation layer with the offset printing process, the amount of offset printing materials used is reduced, which not only reduces production costs but also is more environmentally friendly. S3. Baking: Place the base fabric on the treadmill on the baking rack in accordance with regulations and send it into the baking room for baking. The baking temperature in the baking room is 40-70℃ and the baking time is 6-24 hours.

[0018] Furthermore, in the isolation layer forming step, the isolation layer may be formed by using one of vacuum lamination, hot pressing, cold pressing or coating processes.

[0019] The beneficial effects of the present invention are: 1. This application significantly reduces the amount of offset printing materials used by combining isolation materials with offset printing technology, thereby reducing production costs and being more environmentally friendly.

[0020] 2. This application adopts an isolation layer molding process, which can effectively show the texture of the base fabric material and give the upper a three-dimensional shape. Combined with the subsequent offset printing process, it can produce an upper with a three-dimensional pattern, enrich the appearance of the upper, and meet the diverse needs of modern consumers for the appearance of the upper.

[0021] 3. The isolation layer molding and offset printing process in this application makes the final product have excellent material texture, and the appearance and feel are relatively outstanding, which improves the overall quality of the product and user experience. It also avoids the shortcomings of traditional flat uppers with single patterns and lack of three-dimensional sense, significantly improves the visual appeal of the upper, and enhances the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings: Figure 1This is a schematic diagram of a shoe upper structure of the present invention; Figure 2 is a schematic partial cross-sectional view of a shoe upper when the isolation layer is formed of a uniform isolation material; Figure 3 is a schematic partial cross-sectional view of a shoe upper when the isolation layer is formed of a non-uniform isolation material; Figure 4 This is a diagram showing the usage of offset printing materials when no isolation layer is added; Figure 5 This is a schematic diagram of the amount of offset printing material used after adding the isolation layer; Figure 6 Schematic diagram of a shoe upper and a method for preparing the same according to the present invention; Figure 7 It is a detailed flow diagram of the offset printing step of the present invention.

[0023] The reference numerals are: 1, base fabric; 2, isolation layer; 3, offset layer. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figure 1 and Figure 2 As shown, the present invention provides a technical solution for a shoe upper, which includes: Base fabric 1; An isolation layer 2, which is formed by laminating a waterproof isolation material to the base fabric 1 and is used to isolate the base fabric 1 and the offset layer 3; The offset printing layer 3 forms a pattern on the isolation layer 2 through an offset printing process.

[0026] The isolation layer 2 is formed by a method of blister forming or vacuum lamination, and is adhered to the base fabric 1 by hot pressing to achieve adhesion of the isolation layer 2 to the base fabric 1; The base fabric 1 is a non-planar mesh fabric, and the distance between the highest point and the lowest point of the base fabric 1 is 1>H>0.2mm, so as to enhance the texture of the isolation layer 2.

[0027] After the isolation layer 2 is adhered to the base fabric 1, the distances from the highest point and the lowest point on the surface away from the base fabric 1 to the bottom surface are different. This distance is the shortest distance between the highest and lowest points. The isolation layer 2 is non-planar, which facilitates the adhesion of the offset layer 3 during the offset printing process, thereby improving the firmness of the offset layer 3.

[0028] The isolation material is a film with uniform or uneven thickness, so as to improve the adhesion effect of the offset layer 3 .

[0029] The thickness of the isolation material is less than 1 mm, and the thickness of the isolation material is less than the distance between the highest point and the lowest point of the base fabric, so as to effectively reduce the amount of water-based glue and ink used. The larger the mesh, the more the amount can be reduced. In addition, the isolation material can isolate the base fabric 1 and the offset layer 3, preventing the offset material from penetrating into the base fabric 1, thereby reducing material waste.

[0030] The isolation material is one of a blister film, a TPU film, and a coating.

[0031] The isolation layer 2 partially covers the base fabric 1 to achieve a breathable effect.

[0032] The surface of the offset printing layer 3 has a planar roughness, with an arithmetic average roughness Ra ranging from 2 to 10 μm and a maximum peak-to-valley height Rz ranging from 20 to 50 μm, so as to improve the overall adhesion and firmness of the offset printing layer 3 and prevent it from falling off.

[0033] The offset printing layer 3 has adhesiveness, and has achieved adhesion with the offset printing layer 3 The offset printing layer 3 includes water-based glue and ink.

[0034] The thickness of the offset layer 3 is 0.3-3 mm to ensure the softness of the shoe upper.

[0035] Example 1: Figure 1 To adopt the shoe upper manufactured by this application, Figure 2 The figure is a partial cross-sectional diagram of a shoe upper. The base fabric 1 is a non-planar material, and the distance H between its highest and lowest points is greater than 0.2 mm, so that the isolation material forms the same non-planar surface as the base fabric 1. In this embodiment, the isolation material is a film of uniform thickness, which is adhered to the base fabric 1 to form an isolation layer 2. After the isolation layer 2 is adhered to the base fabric 1, the highest and lowest points on the surface away from the base fabric 1 have different distances to the bottom surface. This distance is the shortest distance between the highest and lowest points. The non-planar nature of the isolation layer 2 facilitates the adhesion of the offset layer 3 during the offset printing process, improving the firmness of the offset layer 3. At the same time, the isolation between the base fabric 1 and the isolation layer 2 prevents the penetration of water-based glue and ink, reducing the amount of offset printing material used.

[0036] Example 2: like Figure 3 , as shown, the difference between this embodiment and embodiment 1 is that: the isolation layer 2 is formed of a non-uniform isolation material, the thickness of the isolation layer 2 at the concave position of the mesh of the base fabric 1 is greater than the thickness at the convex position of the mesh, and the thickness of the isolation layer 2 is uneven, which not only blocks the penetration of water-based glue and ink to the surroundings, but also further fills the mesh, further reducing the amount of offset printing material used; at the same time, after the isolation layer 2 is adhered to the base fabric 1, the distances from the highest point and the lowest point on the surface away from the base fabric 1 to the bottom surface are different, which does not affect the adhesion of the offset printing layer 3.

[0037] Example 3: like Figure 7 As shown, the offset printing in this application specifically includes the following steps: S21. Three-dimensional primer: Use a screen with a mesh size of 100 mesh to evenly print the water-based glue on the base fabric 1. During the printing process, ensure that the offset material is evenly distributed to avoid uneven primer. If uneven primer is found, bake it on the platen at a low temperature of 55-60℃ for 10-15 minutes to ensure that the water-based glue is completely cured and forms a coating of a certain thickness on the surface of the base fabric 1. S22. Ordinary ink printing: according to the design requirements, prepare the color of ordinary ink, use a screen with a mesh size of 200 mesh, pour the prepared ink on the screen, use a squeegee to scrape it downward in an inclined, forceful and even manner, so that the ink passes through the screen and is evenly printed on the base fabric 1. Repeat the printing several times to ensure the integrity of the pattern and the vividness of the color; Example 4: The difference between this embodiment and embodiment 3 is that the offset printing step in this application is to mix the water-based glue and ink and then print until the desired height is reached to form an offset printing layer 3.

[0038] Example 5: Under the premise that the base fabric 1 is all polyester fiber, the upper pattern is of medium complexity, and 1000 pairs of uppers are produced, the amount of water-based adhesive used in the isolation material combined with the offset printing process of the present application is compared with the traditional flat offset printing process. The comparison results are as follows: The process of the present application gives the shoe upper a three-dimensional shape through the isolation layer 2, reducing the amount of offset printing materials required for flat printing, specifically by 40%. The traditional process requires covering a larger area of the shoe upper to ensure the uniformity of the pattern, while the process of the present application uses isolation materials to isolate the base fabric 1 and the offset layer 3, and by controlling the distance between the highest and lowest points on the surface of the isolation layer 2 after bonding with the base fabric 1, the area required for printing is reduced, thereby significantly reducing the amount of offset printing materials, reducing production costs, and further improving environmental protection performance.

[0039] Example 6: Figure 1 In order to adopt the shoe upper manufactured by the present application, different offset layers 3 can be designed on the shoe upper according to different design requirements. The offset layer 3 can be set as a local single layer on the base fabric 1, or it can be set as multiple layers on the base fabric 1. The style of the offset layer 3 can remain consistent, or it can change with the pattern of the base fabric 1.

[0040] Example 7: Figure 4The amount of offset material used when no isolation layer is added. Figure 5 It is the amount of offset printing material used after adding the isolation layer. The shaded part in the figure is the offset printing material, and the groove in the figure is the mesh on the base fabric 1. The larger the mesh, the more offset printing material is consumed. By comparison, it can be found that the traditional process without the isolation layer 2 consumes a large amount of offset printing material, and it may also penetrate into the base fabric 1, thereby generating more usage. On the contrary, the isolation layer 2 of the present application can effectively reduce the use of offset printing material, and can form a protective film between the base fabric 1 and the offset printing material, effectively preventing the offset printing material from penetrating. Specifically, the isolation layer 2 has certain hydrophobicity and waterproofness, thereby generating surface tension, thereby limiting the diffusion of the offset printing material into the mesh, so that the offset printing material adheres to the surface of the isolation layer 2, and the isolation layer 2 can be composed of a uniform film with the same texture as the base fabric 1, or it can be composed of a non-uniform film, which fills the mesh to a certain extent without forming a plane, further reducing the amount of offset printing material used.

[0041] In summary, the isolation material of the present application combined with the offset printing process has significant advantages in reducing the amount of offset printing materials, improving protective performance and enhancing layering. The synergistic effect of the surface tension and non-planar shape of the isolation layer 2 optimizes the production process of the upper and the performance of the final product.

[0042] The present application significantly reduces the amount of offset printing materials used by combining isolation layer molding with offset printing technology, thereby reducing production costs and being more environmentally friendly.

[0043] This application adopts an isolation layer molding process, which can effectively show the texture of the base fabric 1 material and give the upper a three-dimensional shape. Combined with the subsequent offset printing process, it can produce an upper with a three-dimensional pattern, enrich the appearance of the upper, and meet the diverse needs of modern consumers for the appearance of the upper.

[0044] The isolation layer molding and offset printing process in this application makes the final product have excellent material texture, and both appearance and feel are outstanding, which improves the overall quality of the product and user experience. It also avoids the shortcomings of traditional flat uppers with single patterns and lack of three-dimensional sense, significantly improves the visual appeal of the upper, and enhances the market competitiveness of the product.

[0045] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A shoe upper, characterized in that: It includes: Base fabric (1); An isolation layer (2), formed by laminating a waterproof isolation material to a base fabric (1), and used to isolate the base fabric (1) and the offset layer (3); An offset printing layer (3) is formed on the isolation layer (2) through an offset printing process.

2. A shoe upper according to claim 1, characterized in that: The isolation layer (2) is formed by either blister forming or vacuum lamination, and is bonded to the base fabric (1) by heat pressing.

3. The shoe upper according to claim 1, characterized in that: The base fabric (1) is non-planar, and the distance between the highest point and the lowest point of the base fabric (1) is 1>H>0.2mm.

4. The shoe upper according to claim 1, characterized in that: After the isolation layer (2) is adhered to the base fabric (1), the distances from the highest point and the lowest point of the surface away from the base fabric (1) to the bottom surface are different.

5. The shoe upper according to claim 1, characterized in that: The isolation material is a film with uniform or uneven thickness.

6. The shoe upper according to claim 5, characterized in that: The thickness of the isolation material is less than 1 mm.

7. The shoe upper according to claim 6, characterized in that: The isolation material is one of a blister film, a TPU film, and a coating.

8. The shoe upper according to claim 1, characterized in that: The isolation layer (2) partially covers the base fabric (1).

9. The shoe upper according to claim 1, characterized in that: The surface of the offset printing layer (3) has a planar roughness, an arithmetic average roughness Ra in the range of 2-10 μm, and a maximum peak-to-valley height Rz in the range of 20-50 μm.

10. The shoe upper according to claim 9, characterized in that: The offset printing layer (3) is sticky and can adhere to the isolation layer (2).

11. The shoe upper according to claim 10, characterized in that: The offset printing layer (3) contains water-based glue and ink.

12. The shoe upper according to claim 11, characterized in that: The offset printing layer (3) has a thickness of 0.3-3 mm.

13. A method for preparing a shoe upper, for preparing a shoe upper according to any one of claims 1 to 12, characterized in that: It includes: S1, forming the isolation layer: covering the isolation material on the base fabric (1), tightly adsorbing the isolation material on the surface of the base fabric (1) by means of blister forming to form the desired shape and structure, and bonding the isolation material to the base fabric (1) at high temperature, performing heat preservation and cooling to form the isolation layer (2); S2, offset printing: according to the original manuscript, position lines and color separation are carried out. After the screen processing is completed, water-based glue is used for three-dimensional primer and low-temperature baking and curing is carried out until a certain thickness is formed on the surface of the base cloth (1). Ordinary ink is used for printing; S3. Baking: Place the base fabric (1) on the treadmill on a baking rack in a standard manner and place it in a baking room for baking. The baking temperature in the baking room is 40-70°C and the baking time is 6-24 hours.

14. The method for preparing a shoe upper according to claim 13, characterized in that: In the isolation layer forming step, the isolation layer (2) can also be formed using one of vacuum lamination, hot pressing, cold pressing or coating processes.

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