An upper

Abstract

The utility model discloses a vamp belongs to footwear manufacturing technical field, including upper surface layer, middle layer reinforcing layer, lower surface layer and reinforcing layer, the level is through hot melt adhesive film adhesion, a vamp still includes the convexity and connecting column through the integral forming of injection polyurethane soft glue technology, the convexity sets up in the outer surface of upper surface layer, the connecting column is formed by injection from the upper surface layer outside, the connecting column passes upper surface layer, middle layer reinforcing layer with The reinforcing layer is fixedly connected with the top surface fusion of lower surface layer, and the connecting column physically locks solid as a whole structure to each layer material. The utility model solves the problem that the existing technology compound vamp is easy to delaminate, and the durability is insufficient, and the key position is difficult to strengthen, reaches the technical effect of improving the structure combination strength of vamp and high durability, and the impact resistance of key position is strengthened.

Description

Technical Field

[0001] This utility model relates to the field of footwear manufacturing technology, and in particular to a shoe upper. Background Technology

[0002] As a key component of footwear products, the function of the upper has evolved from the initial function of wrapping and protecting to a combination of lightweight, breathability, comfort and high durability. Especially in the field of athletic shoes, in order to balance these different performance indicators, manufacturers generally use multi-layer composite structures to manufacture uppers.

[0003] In existing manufacturing processes, such multi-layer composite uppers typically include an upper layer that provides aesthetic texture, a middle reinforcing layer that provides structural support, and a lower layer that provides cushioning and comfort. These material layers with different functions are mostly bonded together under high temperature and pressure using hot melt adhesive film, thus becoming a single composite.

[0004] This structure, which relies solely on hot melt adhesive film for planar bonding, has inherent defects. During actual wear, the shoe upper needs to withstand millions of bending, stretching, and torsional stresses. These stresses continuously act on the adhesive film bonding interface between layers. Over time, the adhesive film will fatigue and age, leading to a decrease in bonding strength and eventually the peeling of the upper and inner layers, commonly known as delamination or separation. This seriously affects the structural integrity and service life of the shoe upper.

[0005] Furthermore, for critical areas requiring extra protection, such as the toe, although reinforcement layers are added for reinforcement, the bonding between the reinforcement layer and the upper body still relies on hot melt adhesive film. In the toe area, which experiences high impact and high bending frequency, this two-dimensional planar bonding method is difficult to provide a sufficiently strong bond, causing the reinforcement layer to peel off and failing to achieve long-term and effective structural reinforcement.

[0006] Therefore, this utility model proposes a shoe upper to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems in the prior art, where a multi-layered composite structure of a shoe upper relies solely on hot melt adhesive film for bonding, delamination occurs under long-term bending and stress, resulting in insufficient durability and difficulty in effectively reinforcing key parts without adding too much weight, this utility model aims to provide a shoe upper with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a shoe upper, including: an upper surface layer, a middle reinforcing layer, a lower surface layer, and a reinforcing layer; as well as protrusions and connecting posts integrally formed by a polyurethane soft glue injection process; The protrusion is disposed on the outer surface of the upper surface layer, and the connecting post is formed by injection from the outer side of the upper surface layer and passes through the upper surface layer, the middle reinforcing layer, and the reinforcing layer located on the path of the connecting post. Furthermore, the middle reinforcing layer is bonded to the underside of the upper surface layer via a hot melt adhesive film, the lower surface layer is bonded to the underside of the middle reinforcing layer via a hot melt adhesive film, the reinforcement layer is bonded to the middle reinforcing layer via a hot melt adhesive film and is located in the toe area, the connecting post is fused and fixed to the top surface of the lower surface layer, and the connecting post physically locks the upper surface layer, the middle reinforcing layer, the lower surface layer and the reinforcement layer into a whole structure.

[0009] Preferably, the upper surface layer is a microfiber cloth base polyurethane material layer, which has an airless anti-siphon function.

[0010] Preferably, the middle reinforcing layer is a composite layer of plain fabric and yellowing-resistant hot melt adhesive film, used to improve the structural stability of the shoe upper.

[0011] Preferably, the lower surface layer is a composite layer of plain fabric and foam, wherein the foam is used to cushion foot pressure.

[0012] Preferably, the density of the lower surface layer foam is 55 ± 5, and the hardness is 90 ± 5F.

[0013] Preferably, the reinforcing layer is a composite of a microfiber velvet layer and a transparent hot melt adhesive layer, and the reinforcing layer has a level four yellowing resistance property.

[0014] Preferably, the reinforcing layer is used to enhance the impact resistance of the toe.

[0015] Preferably, both the protrusion and the connecting post are made of polyurethane soft rubber.

[0016] Preferably, the protrusion and the connecting post are integrally cast into a continuous structure.

[0017] Preferably, the bottom end of the connecting post is fused to the upper surface of the lower surface layer without penetrating the lower surface layer.

[0018] This utility model has the following beneficial effects: 1. This utility model integrally forms connecting pillars inside the material layers through a polyurethane soft glue injection process. The connecting pillars pass through the upper surface layer, the middle reinforcing layer, and the strengthening layer, and are fused and fixed to the lower surface layer. This solves the problem in the prior art where multi-layer composite shoe uppers rely solely on hot melt adhesive film bonding, resulting in delamination or separation under long-term bending and stress. It can physically lock all layers of materials into a whole, significantly improving the structural bonding strength and high durability of the shoe upper.

[0019] 2. This utility model solves the problem in the prior art that it is difficult to effectively strengthen the impact resistance of key parts such as the toe while maintaining the lightweight design of the shoe upper by setting a special reinforcement layer for the toe area and using the connecting column to firmly lock the reinforcement layer together with the upper and middle reinforcement layers. It can improve the impact resistance and protection of the toe without significantly increasing the weight. Attached Figure Description

[0020] Figure 1 This is a perspective view of a shoe upper proposed in this utility model; Figure 2 This is a structural exploded view of a shoe upper proposed in this utility model; Figure 3 This is a cross-sectional view of the structure of a shoe upper proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0021] Explanation of reference numerals in the attached figures: 1. Top layer; 2. Middle reinforcement layer; 3. Bottom layer; 4. Reinforcing layer; 5. Protrusion; 6. Connecting column. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Please refer to Figures 1 to 4 This utility model provides a shoe upper, including an upper surface layer 1, a middle reinforcing layer 2, a lower surface layer 3, a reinforcing layer 4, a protrusion 5, and a connecting post 6. The upper surface layer 1, the middle reinforcing layer 2, the lower surface layer 3, and the reinforcing layer 4 are first pre-bonded together with a hot melt adhesive film, and then the protrusion 5 and the connecting post 6 are formed by pouring polyurethane soft glue. Finally, all the layered materials are cured into a high-strength integral structure. Specifically, the upper surface layer 1 constitutes the outer layer of the shoe upper, such as... Figure 3 and Figure 4As shown, the upper layer 1 is located at the top of the composite structure. The upper layer 1 is a microfiber cloth sole polyurethane (PU) material layer. The upper layer 1 mainly provides a skin-friendly texture and beautiful appearance. The upper layer 1 has an airless anti-siphon function. The middle reinforcement layer 2 is bonded to the bottom of the upper layer 1 by a high-strength hot melt adhesive film. The middle reinforcement layer 2 is a composite layer of plain cloth and yellowing-resistant hot melt adhesive film. The middle reinforcement layer 2 is used to improve the overall structural stability and deformation resistance of the shoe upper. The lower layer 3 is bonded to the bottom of the middle reinforcement layer 2 by a hot melt adhesive film. The lower layer 3 constitutes the innermost layer of the shoe upper and is used to directly contact the foot. The lower layer 3 is a composite layer of plain cloth and foam. The foam in the lower layer 3 is responsible for directly cushioning the foot pressure and providing a soft and comfortable foot feel. The foam density of the lower layer 3 is 55 ± 5 and the hardness is 90 ± 5F.

[0024] like Figure 2 As shown, reinforcement layer 4 is an independently set reinforcement component. Reinforcement layer 4 is bonded to the middle reinforcement layer 2 by a hot melt adhesive film. Reinforcement layer 4 is located in the toe area. Reinforcement layer 4 is a microfiber reinforcement layer specifically for the toe area. Reinforcement layer 4 works in synergy with the middle reinforcement layer 2 to specifically enhance the impact resistance and structural support of key parts such as the toe. Reinforcement layer 4 is a composite of microfiber suede layer and transparent hot melt adhesive layer. Reinforcement layer 4 has a level 4 yellowing resistance property, which can meet the basic use requirements while reducing the appearance discoloration caused by environmental factors during long-term use.

[0025] Please refer to Figure 2 , Figure 3 and Figure 4 The shoe upper also includes a protrusion 5 and a connecting post 6 integrally formed by a polyurethane soft rubber injection process. The protrusion 5 and the connecting post 6 are a continuous structure integrally injection formed, and the protrusion 5 and the connecting post 6 form a specific structural fit and locking relationship with the aforementioned upper surface layer 1, middle reinforcing layer 2, lower surface layer 3 and reinforcing layer 4. The protrusion 5 is set on the outer surface of the upper surface layer 1 and is used to form a three-dimensional functional or decorative shape on the outside of the shoe upper. The connecting post 6 is the key structure to achieve interlayer locking. The protrusion 5 and the connecting post 6 are both made of polyurethane (PU) soft rubber. The protrusion 5 and the connecting post 6 are integrally formed by pre-composite the upper surface layer 1, middle reinforcing layer 2, lower surface layer 3 and reinforcing layer 4 with a hot melt adhesive film and then by an injection process.

[0026] like Figure 3 and Figure 4As shown, the connecting post 6 is formed by pouring liquid polyurethane soft rubber material onto the outer side of the upper surface layer 1. During the pouring process, the liquid polyurethane soft rubber material has high fluidity. The connecting post 6 passes through the structure of the upper surface layer 1 and continues through the middle reinforcing layer 2. Furthermore, in the toe area where the reinforcing layer 4 is distributed, the polyurethane soft rubber material also passes through the reinforcing layer 4 located on the path of the connecting post 6. After passing through all the above layers, the polyurethane soft rubber material finally contacts and fuses with the top surface of the lower surface layer 3. Specifically, the bottom end of the connecting post 6, during curing, contacts the top surface of the lower surface layer 3. The upper surfaces of layer 3 are fused together without penetrating the lower layer 3, thus forming a strong, physical riveting structure between the material layers. This glue-locking structure, achieved through connecting pillars 6, physically locks the upper layer 1, middle reinforcing layer 2, lower layer 3, and reinforcing layer 4, which were originally only bonded by hot melt adhesive film, into an inseparable whole structure. This structural design ensures that the materials of each layer will not separate or misalign when the upper is subjected to long-term bending, impact, and stretching, significantly improving the bonding strength and overall durability of the composite upper.

[0027] As a preferred embodiment, please refer to Figure 3 and Figure 4 The specific material of the upper layer 1 is defined as follows: the upper layer 1 is a microfiber cloth sole polyurethane (PU) material layer. The upper layer 1 has an airless anti-siphon function. The choice of this material ensures that the shoe upper can prevent external moisture from siphoning into the internal structure while providing a good appearance and texture.

[0028] As a preferred embodiment, please refer to Figure 3 and Figure 4 The specific material of the middle reinforcing layer 2 is defined. The middle reinforcing layer 2 is a composite layer of plain fabric and yellowing-resistant hot melt adhesive film. The middle reinforcing layer 2 is firmly bonded to the lower part of the upper layer 1 and the upper part of the lower layer 3 by the hot melt adhesive film, which is used to improve the overall structural stability and deformation resistance of the shoe upper.

[0029] As a preferred embodiment, please refer to Figure 3 and Figure 4 The specific structure of the lower surface layer 3 is defined. The lower surface layer 3 is a composite layer of plain fabric and foam. The foam layer faces the foot and is used to directly cushion the pressure generated during foot movement, providing a soft foot feel. As a further optimization of the lower surface layer 3, the foam material parameters of the lower surface layer 3 are specifically defined. The foam density is 55 ± 5 and the hardness is 90 ± 5F. This combination of density and hardness provides excellent cushioning performance and support resilience.

[0030] As a preferred embodiment, please refer to Figure 2The specific material of the reinforcing layer 4 is defined. The reinforcing layer 4 is a composite of microfiber suede and transparent hot melt adhesive. The reinforcing layer 4 has a level 4 yellowing resistance property. This material ensures that the reinforcing layer 4 will not change color due to oxidation or light exposure during long-term use. At the same time, the reinforcing layer 4 is specifically designed to enhance the impact resistance of the toe and protect the toes from injury when impacted.

[0031] As a preferred embodiment, please refer to Figure 4 The connection method between the connecting post 6 and the lower surface layer 3 is specifically defined. The bottom end of the connecting post 6 is fused to the upper surface of the lower surface layer 3 in the pouring and melting state. The connecting post 6 does not penetrate the lower surface layer 3. This non-penetrating fusion method ensures the locking strength while also ensuring the integrity and flatness of the inner side of the lower surface layer 3, that is, the side in contact with the foot.

[0032] As a preferred embodiment, please refer to Figure 1 and Figure 2 The structure formed by the potting process is defined such that both the protrusion 5 and the connecting column 6 are made of polyurethane (PU) soft rubber. This soft rubber material has good flexibility and bending resistance after curing. Furthermore, the protrusion 5 and the connecting column 6 are a continuous structure integrally potted and molded. That is, in the potting process, the polyurethane material forming the external protrusion 5 and the material penetrating the internal connecting column 6 are formed simultaneously and are physically connected as a whole.

[0033] Working Principle: The upper adopts a multi-layer composite structure, bonded and injected with hot melt adhesive film. The upper layer 1, made of microfiber fabric, provides a skin-friendly texture and appearance. The material is 1.1MM x 54" SOFTLUX-FV (RP:PO64FKA) microfiber fabric with PU (preheat-shrinkable) (CO NON-WICKING / airless anti-wicking) (60% PU, 40% NYLON). The middle reinforcement layer 2, together with the toe-specific microfiber reinforcement layer, is firmly bonded by a high-strength hot melt adhesive film, significantly improving the structural stability and deformation resistance of the upper, especially enhancing the impact resistance of the toe. The material is 54" HY-871-B-89 plain weave + 0.1MM yellowing-resistant hot melt waist film (200G / IM2) (CO NON-WICKING / airless anti-wicking). The lower layer 3, made of foam, directly cushions the foot pressure, providing a soft feel. The material is 54" HY-871-8 The shoe is constructed from 200g / m² plain fabric (C0 non-wicking) + 2mm x 60" UCR001 foam (density: 55+5, hardness: 90+5F) in black, with adhesive and PE paper. The reinforcing layer 4 is made of 0.8mm x 54" YCUO6 WH SUEDE microfiber + 0.15mm transparent hot melt adhesive (high temperature) (yellowing resistance up to level 4). This material meets basic usage requirements while reducing discoloration caused by environmental factors over long-term use. It is suitable for scenarios with certain requirements for material thickness, bonding stability, and weather resistance. Finally, PU soft glue is injected to form the protrusions 5 and connecting pillars 6 on the shoe surface, further solidifying the materials of each layer, thus achieving a balance between lightweight, breathability, high strength, and high durability.

Claims

1. A shoe upper, comprising: The upper surface layer (1) and the reinforcing layer (4) are bonded together with a middle reinforcing layer (2) under the upper surface layer (1) by a hot melt adhesive film. The lower surface layer (3) is bonded together with a hot melt adhesive film under the middle reinforcing layer (2). The reinforcing layer (4) is bonded to the middle reinforcing layer (2) by a hot melt adhesive film and is located in the toe area. The feature is that it also includes a protrusion (5) and a connecting post (6) integrally formed by a polyurethane soft glue injection process. The protrusion (5) is disposed on the outer surface of the upper surface layer (1). The connecting post (6) is formed by injection from the outer side of the upper surface layer (1). The connecting post (6) passes through the upper surface layer (1), the middle reinforcing layer (2), and the reinforcing layer (4) located on the path of the connecting post (6), and is fused and fixed to the top surface of the lower surface layer (3). The connecting post (6) physically locks the upper surface layer (1), the middle reinforcing layer (2), the lower surface layer (3), and the reinforcing layer (4) into an integral structure.

2. The shoe upper according to claim 1, characterized in that, The upper surface layer (1) is a microfiber cloth base polyurethane material layer, which has an airless anti-siphon function.

3. The shoe upper according to claim 1, characterized in that, The lower surface layer (3) is a composite layer of plain cloth and foam, and the foam is used to cushion foot pressure.

4. The shoe upper according to claim 1, characterized in that, The middle reinforcing layer (2) is a composite layer of plain fabric and yellowing resistant hot melt adhesive film, used to improve the structural stability of the shoe upper.

5. The shoe upper according to claim 1, characterized in that, The reinforcing layer (4) is a composite of microfiber velvet surface layer and transparent hot melt adhesive layer, and the reinforcing layer (4) has a level four yellowing resistance property.

6. The shoe upper according to claim 1, characterized in that, The reinforcing layer (4) is used to enhance the impact resistance of the toe.

7. The shoe upper according to claim 1, characterized in that, The bottom end of the connecting post (6) is fused to the upper surface of the lower surface layer (3) without penetrating the lower surface layer (3).

8. The shoe upper according to claim 1, characterized in that, The protrusion (5) and the connecting column (6) are integrally cast and formed as a continuous structure.

9. The shoe upper according to claim 1, characterized in that, Both the protrusion (5) and the connecting post (6) are made of polyurethane soft rubber.

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