String wire reinforced vamp, preparation method of string wire reinforced vamp and shoe with string wire reinforced vamp

Abstract

The invention discloses a string silk reinforced vamp, a preparation method of the string silk reinforced vamp and a shoe with the string silk reinforced vamp. The string silk reinforced vamp comprises a base layer and a reinforced layer, and the base layer comprises one or more first yarns which are evenly laid in the warp direction and the weft direction and are welded and fixed at the overlapping position; the reinforcing layer comprises one or more second yarns which are paved on the base layer in a reciprocating manner; the second yarns are welded and fixed with the first yarns of the base layer, and the second yarns are welded and fixed with each other at the mutually staggered overlapping parts of the second yarns; the reinforcing layer is provided with a plurality of reinforcing parts formed by overlapping and laying second yarns, and the adjacent second yarns in the reinforcing parts are mutually welded and fixed; the cross section of the second yarn is in a flat shape with the up-down size smaller than the left-right size. By adopting the string wire reinforced vamp with the structure, the wrapping property of the vamp can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of shoe uppers, and in particular to a string-reinforced shoe upper, a preparation method of a string-reinforced shoe upper, and a shoe with the string-reinforced shoe upper. Background Art

[0002] Footwear products include two main parts: the upper and the sole. The upper provides wrapping for the foot to accommodate and position the foot relative to the sole. At the same time, the upper can have a breathable structure to discharge sweat produced by the foot to the outside of the upper. The sole is usually connected to the upper and located below the upper to form a shoe cavity to accommodate the foot with the upper. In addition, the sole can also play a role in cushioning and rebounding to improve the overall wearing comfort of the footwear product.

[0003] Different materials can be used to manufacture the upper. For example, the upper of sports shoes can be made of a variety of different materials into the outer layer, middle layer and inner layer, and according to the structural characteristics required by different layers, for example, for the outer layer, better wear resistance is required, so leather, synthetic leather, rubber, etc. can be selected as the outer layer material; for the inner layer, materials with better moisture absorption performance can be used.

[0004] In order to improve the air permeability, the upper is made thinner and has more air holes. For example, a mesh is used as part of the upper, usually at the toe. This thin and breathable upper is generally made of fibers and yarns through warp and weft weaving. However, since this type of upper is formed by warp and weft weaving, the connection between the yarns is easy to loosen, resulting in poor wrapping of the upper. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology, and to provide a string-reinforced upper, a method for preparing a string-reinforced upper, and a shoe with a string-reinforced upper, wherein the string-reinforced upper can improve the wrapping property of the upper.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] Technical Solution 1: A string-reinforced shoe upper, comprising: a base layer, comprising one or more first yarns evenly laid along the warp and weft directions and fused and fixed at the overlapping parts; a reinforcement layer, comprising one or more second yarns laid back and forth on the base layer; the second yarns are fused and fixed to the first yarns of the base layer, and the second yarns are fused and fixed to each other at the overlapping parts where the second yarns are intertwined with each other; the reinforcement layer has a plurality of reinforcement parts formed by overlapping and laying second yarns, and adjacent second yarns in the reinforcement parts are fused and fixed to each other; the cross-sectional shape of the second yarn is a flat shape with the upper and lower dimensions being smaller than the left and right dimensions.

[0008] Technical solution 2 based on technical solution 1: In the cross-sectional shape of the second yarn, its upper and lower dimensions are smaller than half of its left and right dimensions.

[0009] Technical solution three based on technical solution one: the first yarn and the second yarn are both core-spun yarns, and the skin layers of both are thermoplastic elastomer materials, and the melting points of the core layers of both are higher than the skin layers.

[0010] Technical solution four based on technical solution three: the fusion of the first yarns to each other, the fusion of the second yarn and the first yarn, and the fusion of the second yarns to each other are only the skin layers of the first yarn and the second yarn fused into one.

[0011] Technical solution five based on technical solution three: the thermoplastic elastomer material used in the skin layer of the first yarn and the second yarn is polyurethane thermoplastic elastomer, polyester thermoplastic elastomer, polyamide thermoplastic elastomer or polyethylene thermoplastic elastomer.

[0012] Technical solution six based on technical solution three: the core layers of the first yarn and the second yarn are made of one or more of polyester, nylon, ultra-high molecular weight polyethylene, carbon fiber, and glass fiber.

[0013] Technical Solution 7 based on Technical Solution 3: In the cross-sectional shape of the second yarn, calculated by area percentage, the portion occupied by the cortex is 10%-80%, and the portion occupied by the core layer is 20%-90%.

[0014] Technical solution eight based on technical solution one: the cross-sectional shape of the first yarn is circular, and its diameter is smaller than the left and right dimensions of the second yarn.

[0015] Technical solution nine based on technical solution one: the cross-sectional shape of the first yarn is a flat shape with the upper and lower dimensions smaller than the left and right dimensions, and its left and right dimensions are smaller than the left and right dimensions of the second yarn.

[0016] Technical solution ten based on technical solution one: also includes a surface layer, which is formed by one or more third yarns laid back and forth on the reinforcement layer; the third yarn is fused and fixed to the second yarn of the reinforcement layer and / or to the first yarn of the base layer, and the third yarns are fused and fixed to each other at the overlapping parts where the third yarns are intertwined with each other.

[0017] Technical solution eleven based on technical solution ten: the cross-sectional shape of the third yarn is a flat shape with the upper and lower dimensions smaller than the left and right dimensions, and its left and right dimensions are smaller than or equal to the left and right dimensions of the second yarn.

[0018] Technical solution 12 based on technical solution 1: The base layer also includes first yarns evenly laid in an oblique direction at an angle of 45° to the warp and weft directions respectively, and the obliquely laid first yarns are melted with the first yarns laid in the warp and weft directions at the overlapping parts.

[0019] In addition, the present invention also provides technical solution thirteen: a method for preparing a string-reinforced shoe upper, which includes: evenly laying a first yarn along the warp and weft directions on a soluble base cloth, and fusing the first yarns to each other at overlapping positions by hot pressing; dissolving the base cloth to obtain a base layer; reciprocatingly laying a second yarn on the base layer, the second yarn having a flat cross-sectional shape with upper and lower dimensions smaller than left and right dimensions, and overlapping and laying multiple layers of the second yarn at preset positions, and then fusing and fixing the second yarn to the first yarn at overlapping positions by hot pressing, and at the same time fusing and fixing the second yarn at mutually staggered overlapping positions and between the overlapping layers of the second yarn.

[0020] Technical solution fourteen based on technical solution thirteen: the base fabric is made of a water-soluble material.

[0021] Technical Solution 15 based on Technical Solution 14: The first yarn and the second yarn are both core-spun yarns, and the skin layers of both are thermoplastic elastomer materials, and the melting points of the core layers of both are higher than the skin layers; during hot pressing, the hot pressing temperature is higher than the melting points of the skin layers of the first yarn and the second yarn and lower than the melting points of the core layers of the first yarn and the second yarn.

[0022] In addition, the present invention also provides technical solution sixteen: a shoe with a string-reinforced upper, which includes a sole and also includes the string-reinforced upper as described in any one of technical solutions one to twelve, and the upper is fixed to the sole.

[0023] Technical solution 17 based on technical solution 16: In the reinforcement layer of the upper, there is a portion of the second yarn whose routing extends obliquely upward from the heel portion to the shoelace hole portion, and multiple reinforcement portions are arranged on the routing of this portion of the second yarn.

[0024] Technical Solution 18 based on Technical Solution 17: At the edge of the reinforcing layer of the upper connected to the sole, a reinforced connection portion is formed by tightly arranging second yarns in parallel.

[0025] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0026] The invention provides a string-reinforced shoe upper, a method for preparing the string-reinforced shoe upper and a shoe having the string-reinforced shoe upper. When the string-reinforced shoe upper is applied to a shoe, the wrapping property of the shoe can be improved.

[0027] The string-reinforced upper mainly includes a base layer and a reinforcement layer, which is arranged in multiple layers to establish a foundation for improving the wrapping of the upper; wherein, the first yarns, the second yarns, and the first yarns and the second yarns are fixed by welding, thereby improving the connection strength between the yarns and reducing the loosening phenomenon that may occur in the traditional weaving method; and the reinforcement layer is also provided with a plurality of reinforcement parts, which are formed by overlapping and laying the second yarns, and the overlapping laying structure further enhances the structural strength of the reinforcement layer at the position of the reinforcement part, and at the same time, the second yarns of the reinforcement part are also fixed to each other by welding, so the second yarns of the reinforcement part are not easy to loosen, and the reinforcement part can have good structural stability; at the same time, the cross-sectional shape of the second yarn is a flat shape with the upper and lower dimensions smaller than the left and right dimensions. Compared with the round yarn, the flat second yarn can better fit the curved surface of the upper when laid, reducing material waste, while increasing the contact area with the first yarn or other second yarns, improving the welding strength, and providing the same structural strength. The thickness of the reinforcement layer is thinner and the material is more economical. Moreover, since the upper does not adopt a warp and weft weaving structure, air channels of different sizes can be formed between the first yarns and the second yarns, which can further improve the air permeability of the upper; therefore, the string-reinforced upper has better structural strength and air permeability, improves the wrapping of the foot, and is more suitable for high-intensity sports.

[0028] The first yarn and the second yarn are both core-spun yarns, whose cortexes are thermoplastic elastomer materials, and the melting point of the core layer is higher than that of the cortex. During welding, the cortexes of the first yarn and the second yarn will slightly melt, and the contacting parts of the yarns will fuse together. After cooling, the fuse parts of the yarns can be connected as one. At the same time, the core layer can ensure that the structural strength of the upper is not affected, so that the upper maintains sufficient strength and performance.

[0029] The cross-sectional shape of the first yarn can be circular or flat. In both shape structures, the size of the first yarn is smaller than that of the second yarn, so that the second yarn can form a fusion-fixed relationship with more first yarns at the same time, thereby improving the connection strength between the reinforcement layer and the base layer.

[0030] The surface layer is provided to further enhance the overall structural strength of the upper and improve the wrapping of the upper to the foot. Meanwhile, the surface layer can be designed to form characteristic patterns to increase the aesthetics and functionality of the upper.

[0031] In the base layer, the weaving direction of the first yarn may include diagonal directions in addition to warp and weft. The diagonally extended first yarn increases the connection strength between the first yarns extending in different directions, which can improve the tensile resistance of the upper in all directions and better adapt to the stress conditions during exercise.

[0032] In the preparation method of the string-strengthened shoe upper provided by the present invention, the first yarn is laid on a soluble base cloth and fixed by welding by hot pressing, the base cloth is dissolved to obtain a base layer, and then the second yarn is laid back and forth on the base layer and fixed by welding. Through this preparation method, a uniform and stable base layer can be easily manufactured, and then the second yarn is fixed by welding to form a reinforcement layer. The base cloth can be made of a material that can be dissolved in water, and no harmful substances will be generated during the dissolution process. It is environmentally friendly and easy to handle. During hot pressing, the difference in melting points between the cortex and the core layer of the first yarn and the second yarn is used to make the hot pressing temperature higher than the melting point of the cortex and lower than the melting point of the core. During the hot pressing process, only the cortex will melt and connect as a whole after cooling, and the core layer will not be affected, and its own performance can be maintained.

[0033] The shoe with a string-reinforced upper provided by the present invention comprises the string-reinforced upper and a sole fixed to the upper. In the reinforcing layer of the upper, there is a portion of the second yarn extending obliquely upward from the heel portion to the shoelace hole portion, and a plurality of the reinforcing portions are arranged on the portion of the second yarn. Such an arrangement can effectively improve the structural strength of the upper at the side position. When applied to footwear products such as basketball shoes that require high side strength, the strength performance provided by the upper at this position can effectively improve sports performance.

[0034] In addition, at the edge of the upper's reinforcement layer connected to the sole, a second yarn is tightly arranged in parallel to form a reinforced connection portion, so that the upper has higher structural strength at the connection with the sole, preventing the upper from being disconnected from the sole when pulled. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of the unfolding of a string-reinforced shoe upper provided by an embodiment of the present invention;

[0037] Figure 2 Figure 1 A magnified schematic diagram of part A;

[0038] Figure 3 A schematic cross-sectional view of a string-reinforced shoe upper provided by an embodiment of the present invention;

[0039] Figure 4 A schematic cross-sectional view of a string-reinforced shoe upper provided by an embodiment of the present invention;

[0040] Figure 5A schematic cross-sectional view of a second yarn provided in an embodiment of the present invention.

[0041] Description of main reference numerals:

[0042] Base layer 1; first yarn 2; reinforcement layer 3; second yarn 4; reinforcement part 5; leather layer 6; core layer 7; surface layer 8; third yarn 9; heel part 10; shoelace hole part 11; reinforcement connection part 12. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other 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.

[0044] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0045] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0046] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0047] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0048] An embodiment of the present invention relates to a string-reinforced shoe upper, which can be applied to footwear products and provide restraint and support for the user's foot, thereby improving the wrapping of the user's foot and having the advantages of light weight and good breathability.

[0049] Reference Figure 1 The string-strengthened upper provided in this embodiment includes a base layer 1 and a reinforcement layer 3. The base layer 1 includes one or more first yarns 2 uniformly laid along the warp and weft directions and fused and fixed at the overlapped positions; the reinforcement layer 3 includes one or more second yarns 4 laid back and forth on the base layer 1; the second yarns 4 are fused and fixed to the first yarns 2 of the base layer 1, and at the overlapped positions where the second yarns 4 are interlaced with each other, the second yarns 4 are fused and fixed to each other; the reinforcement layer 3 has a plurality of reinforcement parts 5 formed by overlapping and laying the second yarns 4, and the adjacent second yarns 4 in the reinforcement parts 5 are fused and fixed to each other.

[0050] Among them, refer to Figure 2 , Figure 3 or Figure 5 The cross-sectional shape of the second yarn 4 is a flat shape with the upper and lower dimensions being smaller than the left and right dimensions.

[0051] Before describing the specific structure of the string-reinforced upper, it is necessary to further define the positional terms used in the present specification and claims to describe the upper or shoe. Figure 1 , which shows a schematic diagram of the string-reinforced upper in a flattened state, based on conventional orientation references, Figure 1 The side of the upper facing the outside of the paper is the upper side, and the side facing the back of the paper is the lower side. The rest of the meanings of "upper" and "lower" are the same as the definitions of the upper and lower positions of the upper. At the same time, when the upper is applied to footwear products, it forms a three-dimensional shape that matches the user's foot. At the same time, the upper is defined as "inside" and "outside", where "inside" refers to the side formed by the cooperation of the upper and the sole for accommodating the user's foot, and "outside" is the other side opposite to "inside". For footwear products, the definitions of "front side" and "back side" are also included, where the front side refers to the midline away from the user's body, and the back side refers to the midline toward the user's body; for example, for the shoe for the right foot, the left edge of the shoe is its back side, and the right edge of the shoe is its front side. In addition, the above description also includes parts limited by "left" and "right". Depending on the object being described, "left" and "right" have different definitions, but in general, they refer to the direction perpendicular to the up and down directions and to the front and back directions; for the first yarn 2 or the second yarn 4, the left and right directions of its cross-section are defined by taking its extension direction as the front and back direction.

[0052] The base layer 1 includes one or more first yarns 2 that are evenly laid along the warp and weft directions and are fixed by welding at the overlap. The warp and weft directions refer to two directions perpendicular to each other on a plane. In this embodiment, the warp and weft directions can be considered to be the front-to-back direction and the left-to-right direction, respectively. When forming the base layer 1, the first yarns 2 can first be evenly laid at a preset distance in the left-to-right direction, that is, to form the yarns in the warp direction, and then the first yarns 2 can be evenly laid at a preset distance in the front-to-back direction, that is, to form the yarns in the weft direction, and then at the overlap of the yarns in the warp direction and the yarns in the weft direction, the first yarns 2 at the overlap are welded and fixed by hot pressing, and the base layer 1 can be obtained.

[0053] Among them, taking the laying of the yarn in the warp direction as an example, a separate first yarn 2 may be laid at each position in the left-right direction, or a first yarn 2 may start from a preset position, for example, after being laid from front to back to a preset end position, it turns back and is laid in the opposite direction, that is, from back to front to a preset end position, and in the middle of the two layings, adjacent yarns at different positions in the left-right direction will be spaced by a preset distance, and this is repeated to finally form the yarn in the warp direction in the base layer 1. It is easy to understand that the laying of the yarn in the weft direction is the same, and the first yarn 2 in the warp direction and the first yarn 2 in the weft direction can even be the same yarn.

[0054] In another embodiment, the base layer 1 may further include first yarns 2 uniformly laid in an oblique direction at an angle of 45° to the warp and weft directions, and the obliquely laid first yarns 2 are fused with the first yarns 2 laid in the warp and weft directions at the overlapped positions. Figure 2 , Figure 2 for Figure 1From the enlarged schematic diagram of the middle A part, it can be seen that in addition to the first yarn 2 extending in the front-to-back direction and the left-to-right direction, the base layer 1 also includes the first yarn 2 extending in the oblique direction. The oblique direction here includes two directions, one is the direction from front to back and from left to right, and the other is the direction from front to back and from right to left. Therefore, it can be considered that in the base layer 1, the first yarn 2 is actually laid in four layers from bottom to top, the bottom is the first layer, and the top is the fourth layer. The first layer can be the yarn along the warp direction, the second layer can be the yarn in the weft direction, the third layer can be the yarn extending from front to back and from left to right, and the fourth layer can be the yarn extending from front to back and from right to left. In addition, the first yarns 2 on different layers will overlap at different positions due to the spacing distance between the first yarns 2 of the same layer. For example, the first layer will overlap with the first yarn 2 of the second layer at a certain position, and the first yarns 2 of the third and fourth layers will overlap at the same position, or overlap at another position. At the same time, it should be noted that although the base layer 1 can be considered to have a multi-layer structure, since the first yarns 2 of different layers are fixedly connected by welding, and gaps are formed between the first yarns 2 of the same layer, the overall thickness of the base layer 1 is not the thickness after the four layers of first yarns 2 overlap, but is determined according to the number of overlapping first yarns 2. For example, only two layers of first yarns 2 overlap in some positions, and four layers of first yarns 2 overlap in some positions. Therefore, the base layer 1 is not a flat structure, but has different thicknesses at different positions according to the difference in the number of overlapping first yarns 2.

[0055] The base layer 1 is formed by overlapping and interweaving multiple layers of first yarns 2 and welding and fixing them at the overlapping parts, so that the base layer 1 itself has sufficient structural strength and can be used as the basis of the reinforcement layer 3. By cooperating with the reinforcement layer 3, the overall structural strength of the upper is further improved.

[0056] Reference Figure 1 , the reinforcing layer 3 includes one or more second yarns 4 laid back and forth on the base layer 1, and the second yarns 4 in the reinforcing layer 3 are fused and fixed to the first yarns 2 of the base layer 1 located therebelow. The "back and forth laying" here is a limitation on the routing mode of the second yarns 4 in the reinforcing layer 3, and back and forth means that the second yarns 4 do not have a specific and limited routing direction, for example, the second yarns 4 can be limited to extend along the left and right directions, and then turn to route forward, or the second yarns 4 can route from left to right, and then turn and continue to route from right to left; laying means that the second yarns 4 are laid on the base layer 1, and the second yarns 4 may not be connected to each other, and the reinforcing layer 3 is fixed by the base layer 1, so that the reinforcing layer 3 also forms a whole.

[0057] Of course, in actual applications, the second yarn 4 in the reinforcing layer 3 will have multiple mutually staggered overlaps. Similar to the first yarn 2 in the base layer 1, the second yarn 4 in the reinforcing layer 3 will also be fixedly connected by welding at the staggered overlaps.

[0058] In addition, the reinforcing layer 3 is further provided with a reinforcing portion 5 at a position where the structural strength of the upper needs to be further strengthened. The reinforcing portion 5 is formed by overlapping and laying the second yarns 4, and the adjacent second yarns 4 in the reinforcing portion 5 are welded and fixed to each other. Figure 1 At the position of the reinforcement part 5, the second yarn 4 can be overlapped back and forth at the same position, so that the reinforcement layer 3 has more layers of second yarn 4 at the position of the reinforcement part 5, and at the same time, the second yarns 4 at the position of the reinforcement part 5 are fixedly connected by welding, so that the second yarns 4 at the position of the reinforcement part 5 can form a tight whole, providing higher structural strength and tensile performance. Among them, the routing of the second yarns 4 in the reinforcement part 5 can be along the same direction and stacked at the same position, or along the intersecting direction and overlapped and stacked multiple times at the staggered place, or most of the second yarns 4 are routed in the same direction, and a small part of the second yarns 4 are routed in other intersecting directions and intersect and overlap with most of the second yarns 4. By setting the reinforcement part 5, the structural strength of the string-reinforced upper at a specific position can be effectively improved.

[0059] And, refer to Figure 3 and Figure 5 In this embodiment, the cross-sectional shape of the second yarn 4 used is a flat shape with the upper and lower dimensions smaller than the left and right dimensions. Specifically, the second yarn 4 does not use a conventional yarn with a circular cross-section, but a yarn with a flatter shape. Figure 5The elliptical shape of the second yarn 4 shown in the figure is only one example. In other embodiments, the cross-sectional shape of the second yarn 4 may be a rectangular shape with rounded corners, which is mainly determined by the molding mold of the second yarn 4. However, it can be determined that the relationship between the dimensions of the cross-sectional shape of the second yarn 4 is that its upper and lower dimensions are smaller than its left and right dimensions. The left and right dimensions here refer to the approximate distance between the left and right edges of the second yarn 4 in a direction perpendicular to the extension direction of the second yarn 4 and perpendicular to the upper and lower directions. The upper and lower dimensions here are similar to them, referring to the approximate distance between the upper and lower edges of the second yarn 4. Since the outer edge of the second yarn 4 may not be flat, the above dimensions are all limitations on the shape of the second yarn 4 at a larger scale, as long as the cross-sectional shape of the second yarn 4 is roughly flat. When the flat second yarn 4 is laid back and forth to form the reinforcement layer 3, compared with the yarn with a circular cross-section, under the same weight, the flat second yarn 4 can occupy a larger plane area. At the same time, the second yarns 4 have a larger connection area when they are welded and fixed, which can make the connection between the second yarns 4 and between the second yarn 4 and the first yarn 2 more secure.

[0060] Therefore, the string-reinforced shoe upper involved in the present embodiment mainly includes a base layer 1 and a reinforcement layer 3, and a multi-layer arrangement is used to establish a foundation for improving the wrapping property of the shoe upper; wherein the first yarns 2, the second yarns 4, and the first yarns 2 and the second yarns 4 are fixed by welding, thereby improving the connection strength between the yarns and reducing the loosening phenomenon that may occur in the traditional weaving method; and the reinforcement layer 3 is also provided with a plurality of reinforcement parts 5, and the reinforcement part 5 is formed by overlapping and laying the second yarns 4. The overlapping and laying structure further enhances the structural strength of the reinforcement layer 3 at the position of the reinforcement part 5, and at the same time strengthens The second yarns 4 of the reinforcing part 5 are also fixed to each other by welding, so the second yarns 4 of the reinforcing part 5 are not easy to get loose, and the reinforcing part 5 can have good structural stability; at the same time, the cross-sectional shape of the second yarn 4 is a flat shape with the upper and lower dimensions smaller than the left and right dimensions. Compared with the round yarn, the flat second yarn 4 can better fit the curved surface of the upper when laid, reducing material waste, while increasing the contact area with the first yarn 2 or with other second yarns 4, improving the welding strength, and providing the same structural strength. The thickness of the reinforcing layer 3 is thinner and the material is more economical. In addition, since the upper does not adopt the warp and weft weaving structure, the first yarn 2 and the second yarn 4 can form air permeable channels of different sizes, which can further improve the air permeability of the upper; therefore, the string-reinforced upper has good structural strength and air permeability, improves the wrapping of the foot, and is more suitable for high-intensity sports.

[0061] In another aspect of the string-reinforced shoe upper involved in the present specification, the string-reinforced shoe upper further comprises a surface layer 8, which is formed by one or more third yarns 9 laid back and forth on the reinforcing layer 3; the third yarns 9 are fused and fixed to the second yarns 4 of the reinforcing layer 3 and / or to the first yarns 2 of the base layer 1, and the third yarns 9 are fused and fixed to each other at the overlapping parts where the third yarns 9 are interlaced with each other. The cross-sectional shape of the third yarn 9 is a flat shape with a top-to-bottom dimension smaller than a left-to-right dimension, and its left-to-right dimension is smaller than or equal to the left-to-right dimension of the second yarn 4.

[0062] Reference Figure 4 , the surface layer 8 is similar to the reinforcement layer 3, and can be formed by the third yarn 9 being laid back and forth on the reinforcement layer 3. In addition, since the reinforcement layer 3 is not fully covered with the base layer 1, there is still a space between the second yarns 4 of the reinforcement layer 3, so the third yarn 9 may also contact the first yarn 2 of the base layer 1. The surface layer 8 can further enhance the overall structural strength of the upper, improve the wrapping of the upper to the foot, and at the same time, the surface layer 8 can be designed to form a characteristic pattern to increase the aesthetics and functionality of the upper. Like the second yarn 4, the cross-sectional shape of the third yarn 9 can also be a flat shape with the upper and lower dimensions smaller than the left and right dimensions. In addition to the advantage of the second yarn 4 adopting a flat structure, the third yarn 9 is similar to the second yarn 4 in cross-sectional shape, which can improve the consistency of the overall appearance of the string-reinforced upper, and can also improve the connection strength between the third yarn 9 and the second yarn 4 and the first yarn 2, to prevent the surface layer 8 from falling off the upper. In addition, the left and right dimensions of the third yarn 9 used in the surface layer 8 are smaller than or equal to the left and right dimensions of the second yarn 4, which can prevent the third yarn 9 from crossing multiple second yarns 4 to form a fusion fixation, but only form a fusion fixation with a single second yarn 4 or two second yarns 4, so as to prevent the third yarn 9 of the surface layer 8 from peeling off or opening the second yarn 4 below when being scratched by the outside, thereby providing a certain protection for the reinforcement layer 3.

[0063] In another aspect of the string-reinforced upper involved in the present specification, as a preferred embodiment, in the cross-sectional shape of the second yarn 4, its upper and lower dimensions are less than half of its left and right dimensions. In other words, the second yarn 4 has a relatively high degree of flatness, which can make the contact area between the second yarn 4 and the first yarn 2, the contact area between the second yarns 4, and the contact area between the second yarn 4 and the third yarn 9 larger, thereby ensuring that the connection between the reinforcing layer 3 and the base layer 1 and the surface layer 8 is sufficiently strong, and the connection between the multiple overlapping second yarns 4 in the reinforcing part 5 provided in the reinforcing layer 3 is sufficiently strong, so as to avoid the second yarn 4 in the reinforcing part 5 from being untied due to a large pulling force.

[0064] Among them, the first yarn 2 and the second yarn 4 are both core-spun yarns, and the skin layers 6 of both are thermoplastic elastomer materials, and the melting points of the core layers 7 of both are higher than the skin layers 6. The fusion of the first yarns 2 to each other, the fusion of the second yarn 4 to the first yarn 2, and the fusion of the second yarns 4 to each other are only the skin layers 6 of the first yarn 2 and the second yarn 4 fused into one.

[0065] Specifically, when welding and fixing the yarns, it is necessary to first make part of the yarns in a molten state. After melting, the yarns will mix with each other and connect as a whole after cooling. The first yarn 2 and the second yarn 4 are core-spun yarns, which are yarns with a skin layer 6 and a core layer 7. In this embodiment, the skin layer 6 of the first yarn 2 and the second yarn 4 is made of thermoplastic elastomer material, which is easy to melt and has good connection performance and good physical properties, such as elasticity, wear resistance, aging resistance, etc. As the skin layer 6 of the first yarn 2 and the second yarn 4, it can improve the overall physical properties of the upper. At the same time, the core layer 7 of the first yarn 2 and the second yarn 4 is made of other materials with a higher melting point than the skin layer 6. During welding and fixing, the melting temperature can be set to be higher than the melting point of the skin layer 6 and lower than the melting point of the core layer 7. At this time, the skin layer 6 of the first yarn 2 and the second yarn 4 will be melted, while the core layer 7 will not be affected, thereby reducing the difficulty of the welding and fixing procedure. At the same time, the core layer 7 can make the upper have better structural strength.

[0066] According to actual needs, the thermoplastic elastomer material used in the skin layer 6 of the first yarn 2 and the second yarn 4 is polyurethane thermoplastic elastomer, polyester thermoplastic elastomer, polyamide thermoplastic elastomer or polyethylene thermoplastic elastomer. The core layer 7 of the first yarn 2 and the second yarn 4 is one or more of polyester, nylon, ultra-high molecular weight polyethylene, carbon fiber, and glass fiber. It should be noted that in this embodiment, other physical properties of the specific materials used in the first yarn 2 and the second yarn 4 are not limited, as long as the materials used can be classified as the materials listed above in the art, and it is easy to know that even the same type of material can be adjusted by adjusting the components therein to make it present different chemical and physical properties, but this does not affect the implementation of the base layer 1 and the reinforcement layer 3 provided in this specification and claims.

[0067] In another aspect of the string-reinforced upper involved in this specification, in the cross-sectional shape of the second yarn 4, the portion occupied by the cortex 6 is 10%-80%, and the portion occupied by the core layer 7 is 20%-90% calculated by area ratio. Under different proportions, the second yarn 4 will obviously have different physical properties and welding properties, among which the influence on the physical properties can be distinguished by the technicians in this field according to the different specific materials selected, and the influence on the welding performance is necessary to be pointed out here. Specifically, when the portion occupied by the cortex 6 is larger, the second yarn 4 will have a greater change in shape during welding, because the material of the cortex 6 is more melted, resulting in a larger contact area between the second yarn 4 and other yarns during welding, thereby improving the connection strength between the yarns; when the portion occupied by the core layer 7 is larger, the second yarn 4 can provide better structural strength through the material of the core layer 7; therefore, based on different needs, the proportion of the cortex 6 and the core layer 7 can be adjusted to adapt to different application scenarios.

[0068] As a preferred embodiment, in this embodiment, the skin layer 6 of the second yarn 4 occupies 40%, and the core layer 7 occupies 60%. The second yarn 4 provided in this embodiment achieves a good balance between the connection strength of the yarn and the structural strength of the yarn itself.

[0069] In addition, the third yarn 9 also uses a core-spun yarn similar to the first yarn 2 and the second yarn 4, and the materials of its skin layer 6 and core layer 7 can also be selected from the materials used in the first yarn 2 and the second yarn 4, which will not be elaborated here.

[0070] In another aspect of the string-reinforced upper of the present specification, reference is made to Figure 3 or Figure 4 , the cross-sectional shape of the first yarn 2 is circular, and its diameter is smaller than the left and right dimensions of the second yarn 4. That is to say, the first yarn 2 used in the base layer 1 is thinner than the second yarn 4, and the second yarn 4 in the reinforcing layer 3 can be connected to multiple first yarns 2 at the same time, which enables the base layer 1 to form a denser planar mesh structure, making the connection between the reinforcing layer 3 and the base layer 1 more secure.

[0071] Alternatively, as another preferred embodiment, the cross-sectional shape of the first yarn 2 is a flat shape with a top-bottom dimension smaller than a left-right dimension, and the left-right dimension is smaller than the left-right dimension of the second yarn 4. The flat first yarn 2 can reduce the thickness of the base layer 1, and increase the contact area between the first yarns 2, between the first yarn 2 and the second yarn 4, and between the first yarn 2 and the third yarn 9, thereby further improving the connection strength between the base layer 1, the reinforcement layer 3, and the surface layer 8, and at the same time, it can also improve the structural strength of the base layer 1 itself, and improve the tensile performance of the base layer 1 and the wrapping of the foot.

[0072] As another part of the present invention, it also includes a method for preparing the string-reinforced shoe upper, the preparation method comprising:

[0073] Step 1: evenly laying the first yarns 2 along the warp and weft directions on the dissolvable base fabric, and fusing and fixing the first yarns 2 at the overlapped positions by heat pressing;

[0074] Step 2: dissolving the base fabric to obtain a base layer 1;

[0075] Step three: reciprocally lay out on the base layer 1 a flat second yarn 4 with a cross-sectional shape whose upper and lower dimensions are smaller than its left and right dimensions, and overlap and lay multiple layers of the second yarn 4 at preset positions, and then fuse and fix the second yarn 4 and the first yarn 2 at the overlapping parts by hot pressing, and at the same time fuse and fix the second yarn 4 at the mutually staggered overlapping parts and between the overlapping layers of the second yarn 4.

[0076] The base fabric is made of a water-soluble material. Generally speaking, the material used can be polyvinyl alcohol, which is a high molecular polymer with good water solubility. After dissolving in water, polyvinyl alcohol will not leave harmful residues, which is environmentally friendly and safe. In addition, the dissolution temperature of polyvinyl alcohol is lower than the melting point of the thermoplastic elastomer of the cortex 6 of the core-spun yarn used, so the dissolution of the base fabric will not affect the yarn in the string-reinforced upper. At the same time, during the processing, the base fabric has a certain mechanical strength, so that the base fabric can be used as the basis for laying the base layer 1.

[0077] In addition, the first yarn 2 and the second yarn 4 are both core-spun yarns, and the skin layers 6 of both are thermoplastic elastomer materials, and the melting points of the core layers 7 of both are higher than the skin layer 6; during hot pressing, the hot pressing temperature is higher than the melting point of the skin layer 6 of the first yarn 2 and the second yarn 4 and lower than the melting point of the core layer 7 of the first yarn 2 and the second yarn 4.

[0078] During the process of laying the first yarn 2 on the base fabric, the first yarn 2 can be led out by a head device similar to a 3D printer and laid on the base fabric. Of course, unlike a 3D printer, the first yarn 2 is not in a molten state when it is led out, but has a complete yarn structure. However, in order to keep a good temporary connection between the first yarn 2 and the base fabric during the laying process, the cortex 6 of the first yarn 2 can be in a relatively high temperature state, so that the cortex 6 of the first yarn 2 can have a certain viscosity to adhere to the base fabric. After the first yarn 2 is laid, pressure is applied to the first yarn 2 and heat is applied by hot pressing to melt the cortex 6 of the first yarn 2. Then, the first yarn 2 is cooled, and the base fabric is dissolved to obtain the required base layer 1.

[0079] After obtaining the base layer 1, the second yarn 4 is laid back and forth on the base layer 1 in a manner similar to the laying of the base layer 1, and multiple layers of the second yarn 4 are laid overlappingly at preset positions to form a corresponding reinforcement portion 5 on the reinforcement layer 3, and then pressure is applied to the second yarn 4 and heat is applied by hot pressing to melt the second yarn 4 and the cortex 6 of the first yarn 2, and then the second yarn 4 and the first yarn 2 are waited to cool, so that the desired string-reinforced upper can be obtained.

[0080] On this basis, a surface layer 8 may be added. The laying and fixing method of the surface layer 8 is similar to that of the base layer 1 and the reinforcement layer 3, and will not be described in detail here.

[0081] As another part of the present invention, it also includes a shoe with a string-reinforced upper. The shoe includes a sole and the string-reinforced upper, and the upper is fixed to the sole.

[0082] Specifically, refer to Figure 1 In the reinforcing layer 3 of the upper, there is a part of the second yarn 4 extending obliquely upward from the heel part 10 to the shoelace hole part 11, and a plurality of reinforcing parts 5 are arranged on the part of the second yarn 4. In addition, at the edge of the reinforcing layer 3 of the upper connected to the sole, the second yarn 4 is closely arranged in parallel to form a reinforcing connection part 12.

[0083] in, Figure 1 What is shown is a schematic diagram of the upper in an unfolded state, and the upper is the upper of the left foot shoe, and the front side thereof needs to be provided with a reinforcement portion 5 to improve the structural strength of the front side of the upper. Therefore, in the reinforcement layer 3 of the upper, part of the second yarn 4 extends obliquely from the heel portion 10 to the shoelace hole portion 11, where the heel portion 10 refers to the portion on the upper corresponding to the heel of the foot, and its end is roughly close to the rear end of the foot, and the shoelace hole portion 11 refers to the portion on the upper for setting the shoelace hole. In addition, the reinforcement portion 5 can be set to extend a certain length along a preset direction, that is, the reinforcement portion 5 is formed by repeatedly stacking the second yarn 4 extending in the same direction, so as to increase the overall proportion of the reinforcement portion 5 and improve the structural strength of the upper. When applied to footwear products such as basketball shoes that require high side strength, the strength performance provided by the upper at this position can effectively improve sports performance.

[0084] In addition, refer to Figure 1, a reinforcing connection part 12 is also provided in the reinforcing layer 3 of the upper. The reinforcing connection part 12 is located at the edge where the upper is connected to the sole, which is actually the entire outer edge of the upper, because when the upper is fixed to the sole, its outer edge is inserted into the sole and forms a fixed relationship with the sole. The reinforcing connection part 12 of the upper is formed by the second yarns 4 being arranged in parallel and closely, that is, at the edge of the upper, the second yarns 4 in the reinforcing layer 3 can be repeatedly routed around the edge of the upper, and the second yarns 4 at the back are closely attached to the second yarns 4 at the front, so that a plurality of closely arranged second yarns 4 are formed at the edge of the upper, and then the reinforcing connection part 12 can be formed at the edge of the upper by hot pressing, thereby improving the firmness of the connection between the upper and the sole and preventing the upper from being disconnected from the sole when being pulled.

[0085] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A string-reinforced shoe upper, characterized in that: include: A base layer (1) comprising one or more first yarns (2) uniformly laid in the warp and weft directions and fused and fixed at the overlapped positions; a reinforcing layer (3) comprising one or more second yarns (4) laid back and forth on the base layer (1); the second yarns (4) are fused and fixed to the first yarns (2) of the base layer (1), and at the overlapped positions where the second yarns (4) are interlaced with each other, the second yarns (4) are fused and fixed to each other; the reinforcing layer (3) comprises a plurality of reinforcing portions (5) formed by overlapping and laying the second yarns (4), and the adjacent second yarns (4) in the reinforcing portions (5) are fused and fixed to each other; The cross-sectional shape of the second yarn (4) is a flat shape with the upper and lower dimensions being smaller than the left and right dimensions.

2. The string-reinforced shoe upper according to claim 1, characterized in that: In the cross-sectional shape of the second yarn (4), its top and bottom dimensions are smaller than half of its left and right dimensions.

3. The string-reinforced shoe upper according to claim 1, characterized in that: The first yarn (2) and the second yarn (4) are both core-spun yarns, and the skin layers (6) of both are made of thermoplastic elastomer materials, and the melting points of the core layers (7) of both are higher than the skin layers (6).

4. The string-reinforced shoe upper according to claim 3, characterized in that: The fusion of the first yarns (2) to each other, the fusion of the second yarn (4) and the first yarn (2), and the fusion of the second yarns (4) to each other are merely the fusion of the skin layers (6) of the first yarn (2) and the second yarn (4) into one.

5. The string-reinforced shoe upper according to claim 3, characterized in that: The thermoplastic elastomer material used in the skin layer (6) of the first yarn (2) and the second yarn (4) is polyurethane thermoplastic elastomer, polyester thermoplastic elastomer, polyamide thermoplastic elastomer or polyethylene thermoplastic elastomer.

6. The string-reinforced shoe upper as claimed in claim 3, characterized in that: The core layer (7) of the first yarn (2) and the second yarn (4) is made of one or more of polyester, nylon, ultra-high molecular weight polyethylene, carbon fiber, and glass fiber.

7. The string-reinforced shoe upper according to claim 3, characterized in that: In the cross-sectional shape of the second yarn (4), calculated by area percentage, the portion occupied by the skin layer (6) is 10%-80%, and the portion occupied by the core layer (7) is 20%-90%.

8. The string-reinforced shoe upper according to claim 1, characterized in that: The cross-sectional shape of the first yarn (2) is circular, and its diameter is smaller than the left-right dimension of the second yarn (4).

9. The string-reinforced shoe upper according to claim 1, characterized in that: The cross-sectional shape of the first yarn (2) is a flat shape with a top-to-bottom dimension smaller than a left-to-right dimension, and the left-to-right dimension is smaller than the left-to-right dimension of the second yarn (4).

10. The string-reinforced shoe upper according to claim 1, characterized in that: It also includes a surface layer (8), which is formed by one or more third yarns (9) laid back and forth on the reinforcing layer (3); the third yarn (9) is fused and fixed to the second yarn (4) of the reinforcing layer (3) and / or to the first yarn (2) of the base layer (1), and the third yarns (9) are fused and fixed to each other at the overlapping parts where the third yarns (9) are interlaced with each other.

11. The string-reinforced shoe upper according to claim 10, characterized in that: The cross-sectional shape of the third yarn (9) is a flat shape with its upper and lower dimensions smaller than its left and right dimensions, and its left and right dimensions are smaller than or equal to those of the second yarn (4).

12. The string-reinforced shoe upper according to claim 1, characterized in that: The base layer (1) also includes first yarns (2) uniformly laid in an oblique direction at an angle of 45° to the warp and weft directions respectively, and the obliquely laid first yarns (2) are welded with the first yarns (2) laid in the warp and weft directions at the overlapping parts.

13. A method for preparing a string-reinforced shoe upper, characterized in that: include: The first yarns (2) are evenly laid on the dissolvable base fabric along the warp and weft directions, and the first yarns (2) are welded and fixed to each other at the overlapping parts by means of heat pressing; dissolving the base fabric to obtain a base layer (1); A second yarn (4) having a flat cross-sectional shape with its upper and lower dimensions smaller than its left and right dimensions is laid back and forth on a base layer (1), and multiple layers of the second yarn (4) are laid overlappingly at preset positions. The second yarn (4) and the first yarn (2) are then fused and fixed at the overlapping portions by heat pressing, and the second yarn (4) is simultaneously fused and fixed at the mutually staggered overlapping portions and between the multiple layers of the overlapping second yarn (4).

14. The method for preparing a string-reinforced shoe upper according to claim 13, characterized in that: The base fabric is made of a material soluble in water.

15. The method for preparing a string-reinforced shoe upper according to claim 14, characterized in that: The first yarn (2) and the second yarn (4) are both core-spun yarns, and the skin layers (6) of both are thermoplastic elastomer materials, and the melting points of the core layers (7) of both are higher than the skin layers (6); during hot pressing, the hot pressing temperature is higher than the melting points of the skin layers (6) of the first yarn (2) and the second yarn (4) and lower than the melting points of the core layers (7) of the first yarn (2) and the second yarn (4).

16. A shoe with a string-reinforced upper, comprising a sole, characterized in that: It also includes a string-reinforced upper as described in any one of claims 1-12, wherein the upper is fixed to the sole.

17. The shoe with string-reinforced upper as claimed in claim 16, characterized in that: In the reinforcing layer (3) of the upper, there is a portion of the second yarn (4) extending obliquely upward from the heel portion (10) to the shoelace hole portion (11), and a plurality of reinforcing portions (5) are provided on the portion of the second yarn (4).

18. The shoe with string-reinforced upper as claimed in claim 16, characterized in that: At the edge of the reinforcing layer (3) of the upper connected to the sole, the second yarns (4) are closely arranged in parallel to form a reinforcing connection portion (12).

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