Waterproof breathable sole and children shoes

Abstract

The invention provides a waterproof breathable sole and a child shoe, and belongs to the technical field of shoemaking. The outer-layer outsole is made of a wear-resistant waterproof material, and a plurality of ventilation channel holes penetrating through the thickness of the outer-layer outsole are formed in the inner surface of the outer-layer outsole; the breathable film protection layer is arranged on the inner side of the outer-layer outsole and covers the breathable channel holes, and through holes are formed in the positions, corresponding to the breathable channel holes, of the breathable film protection layer; the waterproof breathable film layer is arranged on the inner side of the breathable film protection layer, a micropore structure is formed on the waterproof breathable film layer, and the micropore structure is suitable for allowing water vapor to pass through and preventing liquid water from passing through. The multi-layer composite structure and the three-dimensional breathable channel are integrated on the sole, so that moisture in a shoe cavity is efficiently discharged while the children shoes are completely waterproof, the problem that the soles are stuffy and airtight is effectively solved, and the wearing dryness and comfort are improved.

Description

Technical Field

[0001] This application belongs to the field of footwear technology, specifically relating to a waterproof and breathable sole and children's shoes. Background Technology

[0002] In the field of children's shoes, it is often difficult to achieve both waterproof and breathable performance.

[0003] Traditional waterproof shoes typically use dense rubber or PVC materials for the soles. While these effectively prevent rainwater or puddles from seeping in, the soles are completely non-breathable. This prevents moisture from evaporating from the feet inside the shoe, leading to stuffy and damp feet after prolonged wear. This not only affects comfort but can also breed bacteria, causing odor or foot health problems. While ordinary breathable soles use materials like perforated EVA or mesh to improve breathability, they cannot prevent the intrusion of liquid water. In rainy weather or when walking in puddles, the shoes easily get wet, rendering them ineffective. Summary of the Invention

[0004] To address at least one of the problems existing in the background technology, this application provides a waterproof and breathable sole. By integrating a multi-layer composite structure and three-dimensional breathable channels into the sole, the children's shoes can be made completely waterproof while efficiently expelling moisture from the shoe cavity, effectively solving the problem of stuffy and unbreathable feet, and improving the dryness and comfort of wearing them.

[0005] This application also provides a children's shoe.

[0006] The technical solution adopted in this application is as follows: The first aspect of this application provides a waterproof and breathable shoe sole, comprising: The outer outsole is made of wear-resistant and waterproof material, and the inner surface of the outer outsole is provided with multiple breathable channels that penetrate its thickness; A breathable membrane protective layer is disposed on the inner side of the outer outsole, the breathable membrane protective layer covers the breathable channel holes, and the breathable membrane protective layer has through holes corresponding to the positions of the breathable channel holes; A waterproof and breathable membrane layer is disposed inside the breathable membrane protective layer. The waterproof and breathable membrane layer has a microporous structure formed on it. The microporous structure is adapted to allow water vapor to pass through while preventing liquid water from passing through.

[0007] According to the waterproof and breathable sole provided in the first aspect of this application, the outer outsole, integrally molded from wear-resistant and waterproof material, not only ensures the durability of the sole and the physical barrier against liquid water, but also features multiple breathable channels with a thickness that penetrate the inner surface, creating a physical path for moisture to escape. The breathable membrane protective layer located on its inner side covers the breathable channel holes, and the corresponding through holes ensure the connectivity of the airflow channels. At the same time, this protective layer can effectively prevent external pollutants such as mud and dust from directly contacting and clogging the upper waterproof and breathable membrane layer, and also avoids direct pressure and wear on the membrane layer by the insole or foot, playing a key physical barrier role. The innermost waterproof and breathable membrane layer utilizes its nano-scale microporous structure and, by virtue of the difference in surface tension, allows only water vapor molecules to pass through while completely blocking liquid water droplets, thus achieving the core functions of "waterproof" and "breathable". The combined effect of these three layers allows moisture generated inside the shoe cavity to enter through the micropores of the breathable membrane layer via the insole or shoe cavity space, and then smoothly escape to the outside of the shoe through the pores of the breathable membrane protective layer and the breathable channels of the outer outsole, forming a continuous breathable path from the inside to the outside. External liquid water is effectively blocked by the double barrier of the outer outsole and the waterproof and breathable membrane layer, preventing it from penetrating. Integrating breathability into the sole, which is in direct contact with the ground, breaks through the limitations of traditional waterproof shoes being "waterproof but not breathable" or breathable shoes being "breathable but not waterproof." At the same time, the protective layer significantly improves the durability and reliability of the waterproof and breathable membrane in harsh environments, enabling children's shoes to be completely waterproof while efficiently ventilating the shoe cavity, effectively solving the problem of stuffy and unbreathable feet, and improving dryness and comfort.

[0008] According to one embodiment of this application, it also includes: A flow-guiding and buffering structure layer is disposed on the inner side of the waterproof and breathable membrane layer. The flow-guiding and buffering structure layer has a recessed or open structure corresponding to the breathable channel hole, which is used to guide the flow of moisture in the shoe cavity to the breathable channel hole.

[0009] According to one embodiment of this application, the outer outsole, the breathable membrane protective layer, the waterproof and breathable membrane layer, and the flow-guiding and cushioning structure layer are bonded together in the non-breathable area by an adhesive, and remain open in the breathable channel hole area to form a continuous breathable path from the shoe cavity through the flow-guiding and cushioning structure layer, the waterproof and breathable membrane layer, and the breathable membrane protective layer to the outside of the outer outsole.

[0010] According to one embodiment of this application, the waterproof and breathable membrane layer is a thermoplastic polyurethane hydrophobic waterproof and breathable film.

[0011] According to one embodiment of this application, the breathable membrane protective layer is a mesh nylon fabric.

[0012] According to one embodiment of this application, the outer outsole is an integrally molded structure comprising rubber or EVA material.

[0013] According to one embodiment of this application, the flow-guiding buffer structure layer includes foamed EVA with a flow-guiding groove or protrusion array structure on its surface to increase the surface area and promote the diffusion of moisture toward the air-permeable channel holes.

[0014] According to one embodiment of this application, the number of ventilation channel holes is multiple, distributed in the forefoot, midfoot and heel areas of the sole, and the diameter of the ventilation channel holes is 1.0mm to 5.0mm.

[0015] A second aspect of this application provides a children's shoe, comprising: The upper and the waterproof and breathable sole in any of the embodiments of the first aspect as described above; The upper is sealed to the edge of the waterproof and breathable sole to form an integral waterproof structure.

[0016] According to one embodiment of this application, the shoe also includes an antibacterial insole, which is disposed on the flow-guiding and cushioning structure layer and has a ventilation window at the position corresponding to the ventilation channel hole to allow moisture to pass through and enter the continuous ventilation path. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the outer outsole of the waterproof and breathable shoe sole provided in the embodiments of this application; Figure 2 A schematic diagram showing the distribution structure of the outer outsole, breathable membrane protective layer, and waterproof and breathable membrane layer provided in the embodiments of this application; Figure 3 This is a schematic diagram of the flow-guiding buffer structure layer provided in the embodiments of this application.

[0018] in, 11. Outer outsole; 111. Ventilation channel holes; 12. Ventilation membrane protective layer; 13. Waterproof and breathable membrane layer; 14. Flow-guiding and buffering structure layer; 141. Recess; 142. Opening structure. Detailed Implementation

[0019] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0021] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0024] like Figures 1 to 2 As shown, a first aspect of this application provides a waterproof and breathable shoe sole, comprising: The outer outsole 11 is made of wear-resistant and waterproof material, and the inner surface of the outer outsole 11 is provided with multiple breathable channel holes 111 that penetrate its thickness; A breathable membrane protective layer 12 is disposed on the inner side of the outer outsole 11, the breathable membrane protective layer 12 covers the breathable channel holes 111, and the breathable membrane protective layer 12 has through holes corresponding to the positions of the breathable channel holes 111. A waterproof and breathable membrane layer 13 is disposed inside the breathable membrane protective layer 12. The waterproof and breathable membrane layer 13 has a microporous structure formed on it. The microporous structure is suitable for allowing water vapor to pass through while preventing liquid water from passing through.

[0025] The outer outsole 11 is made of abrasion-resistant and waterproof material (such as rubber or EVA), forming the outermost layer of the sole and directly contacting the ground. Its main functions are to provide the abrasion resistance, slip resistance, and structural support required for walking. Multiple ventilation channels 111 extending through the thickness of the inner surface are the physical outlets for moisture to escape from inside the shoe to the external environment, and are the endpoints of the entire ventilation path.

[0026] The one-piece molded wear-resistant and waterproof material ensures the overall waterproofness of the sole, effectively blocking the intrusion of external liquid water such as rainwater and puddles. At the same time, by actively designing and manufacturing breathable channels 111 in the structure, the originally non-breathable solid outsole is transformed into a component with active ventilation function, fundamentally changing the traditional role of the sole as merely a "barrier" and making it a key part of the "breathing system".

[0027] The breathable membrane protective layer 12 is located inside the outer outsole 11, completely covering the breathable channel holes 111. It itself has through holes corresponding to the breathable channel holes 111, ensuring airflow connectivity. The primary function of this layer is not breathability or waterproofing, but rather to provide physical protection for the upper waterproof and breathable membrane layer 13.

[0028] The breathable membrane protective layer 12 acts like a "protective net," effectively preventing external pollutants such as mud, sand, and dust from flowing back into the shoe through the breathable channel holes 111 and clogging the micropores of the waterproof and breathable membrane above. At the same time, it also prevents the insole or foot from directly squeezing, rubbing, or puncturing the waterproof and breathable membrane when under pressure, thereby greatly improving the durability, stability, and service life of the core functional membrane layer.

[0029] The waterproof and breathable membrane layer 13 is placed inside the breathable membrane protective layer 12 and is the core functional layer that achieves the contradictory unity of "waterproof" and "breathable". The micropore structure on it is extremely small (usually in the nanometer scale) and works based on the principle of surface tension of water: water vapor molecules (gas state) are small in volume and can be freely discharged through the micropores; while liquid water molecules form water droplets due to surface tension, which are much larger than the micropores and cannot penetrate, thus being blocked.

[0030] The waterproof and breathable membrane layer 13 is key to achieving the "breathable but waterproof" function. It allows moisture (water vapor) formed by the evaporation of sweat from the feet inside the shoe cavity to be continuously and efficiently discharged outwards, keeping the inside of the shoe dry. At the same time, even if the outer outsole 11 is wet or comes into prolonged contact with water, liquid water will be effectively blocked by this membrane and cannot enter the shoe cavity, ensuring the waterproof performance of the shoe.

[0031] According to the waterproof and breathable sole provided in the first aspect of this application, the outer outsole 11, integrally molded from wear-resistant and waterproof material, not only ensures the durability of the sole and the physical barrier against liquid water, but also has multiple breathable channel holes 111 through the thickness designed on its inner surface, creating a physical path for moisture to escape; the breathable membrane protective layer 12 located on its inner side covers the breathable channel holes 111, and the through holes at the corresponding positions ensure the connection of the airflow channel. At the same time, the protective layer can effectively prevent external pollutants such as mud and dust from directly contacting and clogging the waterproof and breathable membrane layer 13 above, and also avoids direct compression and wear of the membrane layer by the insole or foot, playing a key physical barrier role; while the waterproof and breathable membrane layer 13 located on the innermost side utilizes its nano-scale microporous structure, relying on the difference in surface tension, to allow only water vapor molecules to pass through, while completely blocking liquid water droplets from the outside, thereby realizing the core functions of "waterproof" and "breathable". The combined effect of these three layers allows moisture generated inside the shoe cavity to enter through the insole or shoe cavity space via the micropores of the breathable membrane layer, and then smoothly drain to the outside of the shoe through the through-holes of the breathable membrane protective layer 12 and the breathable channel holes 111 of the outer outsole 11, forming a continuous breathable path from the inside to the outside. External liquid water is effectively blocked by the double barrier of the outer outsole 11 and the waterproof and breathable membrane layer 13, preventing it from penetrating. Integrating breathability into the sole, which directly contacts the ground, breaks through the limitations of traditional waterproof shoes being "waterproof but not breathable" or breathable shoes being "breathable but not waterproof." At the same time, the protective layer significantly improves the durability and reliability of the waterproof and breathable membrane in harsh environments, enabling children's shoes to be completely waterproof while efficiently ventilating the shoe cavity, effectively solving the problem of stuffy and unbreathable feet, and improving dryness and comfort.

[0032] like Figures 1 to 3 As shown, in some embodiments of this application, it further includes: A flow-guiding and buffering structure layer 14 is disposed on the inner side of the waterproof and breathable membrane layer 13. The flow-guiding and buffering structure layer 14 has a recess 141 or an opening structure 142 corresponding to the breathable channel hole 111, which is used to guide the flow of moisture in the shoe cavity to the breathable channel hole 111.

[0033] The flow-guiding and cushioning structure layer 14 is located on the inner side of the waterproof and breathable membrane layer 13 (i.e., the side closer to the foot). The addition of this layer greatly optimizes and enhances the efficiency and wearing experience of the entire waterproof and breathable system. Its recessed 141 or perforated structure 142 precisely aligns with the lower ventilation channel 111 inside the sole, forming a pre-designed flow channel from the shoe cavity to the ventilation vent. This effectively collects moisture generated in various areas of the sole and actively guides it to the entrance of the ventilation path, preventing disordered diffusion and accumulation of moisture within the shoe cavity, and significantly improving the efficiency and speed of moisture removal. Simultaneously, as part of the sole structure, this layer undertakes important cushioning and shock absorption functions. The foamed EVA material effectively absorbs the impact of walking, running, and jumping, protecting children's developing feet and bones. The flow-guiding and cushioning structure layer 14 is not only a functional enhancement but also a multi-functional integrated layer combining "flow enhancement, cushioning protection, and increased evaporation area," simultaneously improving waterproof and breathable performance and wearing comfort.

[0034] In some embodiments of this application, the outer outsole 11, the breathable membrane protective layer 12, the waterproof and breathable membrane layer 13, and the flow-guiding and buffering structure layer 14 are bonded together in non-breathable areas by an adhesive, while remaining open in the area of ​​the breathable channel holes 111, forming a continuous breathable path from the shoe cavity through the flow-guiding and buffering structure layer 14, the waterproof and breathable membrane layer 13, and the breathable membrane protective layer 12 to the outside of the outer outsole 11.

[0035] To firmly bond the outer outsole 11, the breathable membrane protective layer 12, the waterproof and breathable membrane layer 13, and the flow-guiding and cushioning structure layer 14 into a single integrated sole structure, an adhesive is required for interlayer bonding. The key to this technical solution is that the adhesive application is limited to non-breathable areas (i.e., solid portions of each layer that do not contain breathable channel holes 111, through holes, or openings), while all areas related to breathability—i.e., the breathable channel holes 111 of the outer outsole 11, the through holes of the breathable membrane protective layer 12, and the recesses 141 or openings 142 of the flow-guiding and cushioning structure layer 14—remain completely open to prevent any adhesive from flowing in or being applied.

[0036] By precisely controlling the bonding area, the adhesive is completely prevented from clogging tiny air channels, pores, or micropores of the waterproof and breathable membrane during the bonding process. This ensures unobstructed airflow from the inside of the shoe cavity to the outside of the sole.

[0037] The aforementioned precise composite process ensures that the openings / recesses 141 of the flow-guiding and cushioning structure layer 14, the micropores of the waterproof and breathable membrane layer 13, the through-holes of the breathable membrane protective layer 12, and the breathable channel holes 111 of the outer outsole 11 are precisely aligned and connected, forming a continuous, unidirectional three-dimensional breathable path from the inside (shoe cavity) to the outside (outer sole). Moisture can travel along this pre-designed, efficient channel, passing sequentially through the flow-guiding and cushioning structure layer 14 (collection and guidance), the waterproof and breathable membrane layer 13 (air-water separation), and the breathable membrane protective layer 12 (safety channel), and finally exiting through the breathable holes of the outer outsole 11. The entire process is characterized by low resistance and high efficiency.

[0038] In some embodiments of this application, the waterproof and breathable membrane layer 13 is a thermoplastic polyurethane hydrophobic waterproof and breathable film.

[0039] The waterproof and breathable membrane layer 13 is a hydrophobic waterproof and breathable film made of thermoplastic polyurethane (TPU). TPU is a high-performance polymer elastomer material whose molecular structure itself has hydrophobic (repelling liquid water) properties. Through special processes (such as stretching, phase separation, etc.), a large number of uniform and stable nanoscale micropores are formed on the TPU film. These micropores constitute channels that allow water vapor molecules (with a diameter of about 0.0004 micrometers) to pass freely, while liquid water molecules will aggregate into water droplets with a diameter much larger than the micropores (usually 0.1-1 micrometers) due to surface tension, thus being effectively blocked outside the membrane.

[0040] TPU film possesses extremely high water vapor permeability and excellent hydrostatic pressure resistance, enabling efficient moisture wicking and reliable liquid water barrier properties. It is an ideal material for achieving both waterproof and breathable functionality. TPU material exhibits excellent elasticity, flexibility, and abrasion resistance. In environments like shoe soles that require repeated bending, compression, and friction, the TPU film is not prone to cracking or pinholes due to deformation, maintaining its waterproof and breathable integrity for a long time. TPU material is non-toxic, odorless, and free of plasticizers (such as phthalates in PVC), making it gentle on the skin and ideal for footwear products that come into direct or indirect contact with children's feet, meeting the safety and health requirements for children's products.

[0041] In some embodiments of this application, the breathable membrane protective layer 12 is a mesh nylon fabric.

[0042] Nylon (polyamide) is a high-strength, highly abrasion-resistant synthetic fiber. When woven into a "mesh" structure—forming regular or irregular meshes on the fabric surface—this structure ensures overall material strength while providing extremely high porosity and air permeability. Nylon itself possesses extremely high tensile strength, abrasion resistance, and tear resistance. As the direct "armor" of the waterproof and breathable membrane layer 13, it effectively resists physical impacts, friction, and punctures from both external (such as ground gravel and sharp objects) and internal (such as insole edges and toes), preventing the fragile TPU waterproof and breathable membrane from being damaged by external forces, thereby significantly improving the durability of the core functional layer and product lifespan.

[0043] In some embodiments of this application, the outer outsole 11 is an integrally molded structure comprising rubber or EVA material.

[0044] Rubber is renowned for its superior abrasion resistance, high coefficient of friction, and excellent grip, making it particularly suitable for shoe soles that frequently come into contact with rough or slippery surfaces. This effectively extends the lifespan of the sole and ensures children's walking safety. Choosing rubber as a material option ensures the durability and slip resistance of the soles in various surface conditions.

[0045] EVA is a lightweight foam material with extremely low density, good elasticity, and excellent cushioning and shock absorption properties. Using EVA material can significantly reduce the weight of the shoe sole, reduce the burden on children's walking, and effectively absorb ground reaction forces, improving wearing comfort, making it especially suitable for active children.

[0046] The one-piece molding manufacturing method ensures that the outer outsole 11 is a complete, seamless whole, avoiding potential water seepage gaps caused by component splicing and further improving waterproof reliability. More importantly, it allows the multiple breathable channel holes 111 on the inner surface to be precisely and consistently manufactured using molds during the molding process, ensuring a high degree of accuracy in the position, size, and shape of each hole. This lays a solid foundation for the precise alignment of subsequent layers (protective layer, membrane layer, and flow-guiding layer) and the formation of continuous breathable paths.

[0047] In some embodiments of this application, the flow-guiding buffer structure layer 14 includes foamed EVA with flow-guiding grooves or a raised array structure on its surface to increase the surface area and promote the diffusion of moisture toward the breathable channel holes 111.

[0048] The surface's channeling grooves or raised array structure breaks the limitations of the flat surfaces of traditional insoles or cushioning layers, forming a three-dimensional channeling network. The channeling grooves act like "miniature water channels," quickly collecting and guiding moisture (water vapor) generated in different areas of the sole within the shoe cavity to specific areas aligned with the lower ventilation channel holes 111. The raised array structure, by creating "microchannels" for airflow around it, promotes the lateral diffusion and upward migration of moisture. Both effectively increase the contact surface area between the material and air, accelerating moisture evaporation and movement towards the vents, significantly improving the efficiency and speed of moisture removal.

[0049] In some embodiments of this application, there are multiple ventilation channel holes 111, distributed in the forefoot, midfoot and heel areas of the sole, and the diameter of the ventilation channel holes 111 is 1.0mm to 5.0mm.

[0050] The ventilation holes 111 are distributed in the forefoot, midfoot, and heel areas, achieving "full coverage ventilation" for key areas of the foot. The forefoot is the main area of ​​force exertion and flexion during walking, with a dense distribution of sweat glands, making it one of the main sources of moisture. The midfoot area supports the arch of the foot and needs to be kept dry to maintain comfortable support. The heel area bears the greatest impact and is also prone to moisture accumulation. Ventilation holes in these areas ensure that moisture is quickly expelled near its source, avoiding localized stuffiness and dampness, and achieving a balanced and comprehensive ventilation effect for the entire sole.

[0051] A aperture range of 1.0mm to 5.0mm is a proven optimal range. While smaller apertures (<1.0mm) better prevent sand and mud from entering, they significantly increase airflow resistance, reduce breathability, and may even become completely clogged by adhesives or fine dust. Larger apertures (>5.0mm), while allowing for smooth airflow, greatly increase the risk of external mud, water, and sand flowing back in, and may affect the structural strength and abrasion resistance of the outer outsole. An aperture range of 1.0mm-5.0mm strikes the best balance between ensuring efficient airflow (low resistance) and effective protection against contamination and clogging (blocking most common particles). This size range also facilitates precise molding, ensuring production consistency.

[0052] A second aspect of this application provides a children's shoe, comprising: The upper and the waterproof and breathable sole in any of the embodiments of the first aspect described above; The upper and the waterproof and breathable sole are sealed together at the edges to form an integral waterproof structure.

[0053] The edges of the upper and the waterproof, breathable sole are connected using sealing techniques such as hot melt adhesive, high-frequency welding, and edge stitching with glue sealing. By sealing the edges of the upper and sole, this main water ingress channel is completely blocked, creating a complete, leak-proof waterproof barrier from the sole to the upper. This ensures that children's feet are effectively protected from all directions when walking in the rain, stepping through puddles, or playing on damp grass, truly achieving "complete waterproofing."

[0054] In some embodiments of this application, an antibacterial insole is also included. The antibacterial insole is disposed on the flow-guiding and buffering structure layer 14, and has a ventilation window at the position corresponding to the ventilation channel hole 111 to allow moisture to pass through and enter the continuous ventilation path.

[0055] The "ventilation window" design is crucial for ensuring the integrity of the system's functionality. It allows moisture generated from the feet to first pass through the ventilation window of the antibacterial insole, then sequentially through the ventilation channels 111 of the drainage and cushioning structure layer 14, the waterproof and breathable membrane layer 13, and the outer outsole 11, before finally exiting the shoe. This ensures that the sole's efficient breathability is not weakened or interrupted by the addition of an insole, achieving a seamless integration of antibacterial and breathable functions.

[0056] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0057] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0058] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A waterproof, breathable shoe sole, characterized by, The waterproof and breathable shoe sole comprises: an outer sole made of a wear-resistant waterproof material, an inner surface of the outer sole being provided with a plurality of through-thickness breathable passage holes; a waterproof membrane protective layer arranged on the inner side of the outer sole, the waterproof membrane protective layer covering the breathable passage holes, the waterproof membrane protective layer being provided with through holes corresponding to the positions of the breathable passage holes; a waterproof and breathable membrane layer arranged on the inner side of the waterproof membrane protective layer, the waterproof and breathable membrane layer being formed with a microporous structure adapted to allow water vapor to pass through while preventing liquid water from passing through.

2. The waterproof, vapor-permeable shoe sole according to claim 1, characterized in that Further comprising: a flow guide and buffer structure layer arranged on the inner side of the waterproof and breathable membrane layer, the flow guide and buffer structure layer being provided with recessed or open hole structures corresponding to the positions of the breathable passage holes for guiding the moisture in the shoe cavity to the breathable passage holes.

3. The waterproof, vapor-permeable shoe sole according to claim 2, characterized in that The outer sole, the waterproof membrane protective layer, the waterproof and breathable membrane layer and the flow guide and buffer structure layer are laminated through an adhesive in non-breathable areas, and remain open in the breathable passage hole areas, forming a continuous breathable path from the shoe cavity to the outside of the outer sole via the flow guide and buffer structure layer, the waterproof and breathable membrane layer, the waterproof membrane protective layer and the outer sole.

4. The waterproof, vapor-permeable shoe sole according to claim 1, characterized in that, The waterproof and breathable membrane layer is a thermoplastic polyurethane hydrophobic waterproof and breathable film.

5. The waterproof, vapor-permeable shoe sole according to claim 1, characterized in that, The waterproof membrane protective layer is a mesh nylon cloth.

6. The waterproof, vapor-permeable shoe sole according to claim 1, characterized in that The outer sole is an integrally formed structure comprising rubber or EVA material.

7. The waterproof, vapor-permeable shoe sole according to claim 2, characterized in that The flow guide and buffer structure layer comprises foamed EVA and is provided with a flow guide groove or a convex array structure on the surface for increasing the surface area and promoting the diffusion of moisture towards the breathable passage holes.

8. The waterproof, vapor-permeable shoe sole according to claim 1, characterized in that The number of the breathable passage holes is multiple, and they are distributed in the forefoot, midfoot and heel areas of the sole, the aperture of the breathable passage holes being 1.0mm-5.0mm.

9. A child's shoe, characterized in that The waterproof and breathable shoe sole comprises: an upper and the waterproof and breathable shoe sole according to any one of claims 1-8; the upper and the waterproof and breathable shoe sole are sealingly connected at the edges to form an integral waterproof structure.

10. The child's shoe according to claim 9, wherein Further comprising an antibacterial insole arranged on the flow guide and buffer structure layer, the antibacterial insole being provided with breathable windows corresponding to the positions of the breathable passage holes to allow moisture to pass through and enter the continuous breathable path.

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