Antibacterial and breathable rubber shoe sole and method for producing the same

Abstract

The application relates to the technical field of rubber shoe sole production and processing, and discloses an antibacterial and breathable rubber shoe sole and a production method thereof. In the application, the rubber shoe sole body is internally provided with an antiskid and wear-resistant bottom layer, a three-dimensional breathable and buffering middle layer and an antibacterial and skin-friendly top layer; the lower end of one side of the antiskid and wear-resistant bottom layer is provided with an antiskid heel; the antiskid and wear-resistant bottom layer, the three-dimensional breathable and buffering middle layer and the antibacterial and skin-friendly top layer are all modified rubber materials doped with a chitosan-nano titanium dioxide composite antibacterial component; the chitosan-nano titanium dioxide composite antibacterial component can realize long-acting bacteria inhibition of the rubber shoe sole body in the whole domain without dead angles; the wet heat accumulated on the feet can be quickly discharged through the air permeation structure in the three-dimensional breathable and buffering middle layer; the humid and warm environment required for the breeding of bacteria and molds is destroyed from the source; the functions of wear resistance, skid resistance, buffering and shock absorption, long-acting antibiosis, continuous air permeation and the like are simultaneously realized; and the comfort and hygiene during long-time wearing are greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of rubber shoe sole production and processing technology, specifically an antibacterial and breathable rubber shoe sole and its production method. Background Technology

[0002] Rubber shoes, with their outstanding advantages of waterproofing, abrasion resistance, and low cost, are widely used in various scenarios such as industrial and mining work, field operations, outdoor construction, and daily commuting, maintaining a consistently high market share. The core load-bearing component of rubber shoes is the sole. Traditional manufacturing processes primarily involve the vulcanization and molding of natural and synthetic rubber blends, relying on the dense structure of the rubber itself to achieve basic waterproofing and abrasion resistance. As public awareness of health and protection continues to rise, market demand for functional rubber shoe soles is gradually expanding. Additional properties such as antibacterial properties, deodorization, and breathability have become the main research and development directions for product iteration. Various functional modified rubber raw materials and layered composite molding processes are gradually being introduced into sole production. The industry continues to conduct various improvements and research on sole materials and molding structures to adapt to the wearing and use needs of different working environments.

[0003] Currently, several functionally improved rubber shoe soles have appeared on the market. Some products impart antibacterial capabilities by adding inorganic antibacterial powders and plant-derived antibacterial components to the rubber matrix, while others optimize breathability by adjusting the foaming ratio and creating simple pores. Layered composite structure designs are also gradually being applied to sole manufacturing, dividing the sole into an upper layer that contacts the foot, a cushioning middle layer, and a ground-resistant abrasion-resistant bottom layer. Different layers can be combined with differentiated additive formulations, and the maturity of the layered vulcanization molding process is continuously improving. Related processing equipment, including intensive mixing equipment, specialized stamping dies, and fully automated vulcanization units, has achieved mass production and widespread adoption, enabling stable batch production of finished rubber shoe soles with basic antibacterial or basic breathability functions.

[0004] However, existing rubber shoe soles cannot simultaneously provide long-lasting antibacterial properties and stable breathability. Moisture and heat inside the shoe cannot be quickly expelled, and bacteria continue to grow in the damp environment, resulting in poor overall performance and reduced wearing comfort. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems with existing rubber shoe soles, which struggle to simultaneously achieve long-lasting antibacterial properties and stable breathability, resulting in poor overall performance and reduced wearing comfort due to the inability of existing soles to quickly expel internal heat and moisture, leading to bacterial growth in a damp environment. This invention provides an antibacterial and breathable rubber shoe sole and its manufacturing method.

[0006] The technical solution adopted in this invention is as follows: an antibacterial and breathable rubber shoe sole, comprising a rubber shoe sole body, wherein the bottom of the rubber shoe sole body is provided with an anti-slip and wear-resistant bottom layer, the upper end of the anti-slip and wear-resistant bottom layer is provided with a three-dimensional breathable and cushioning middle layer, the upper end of the three-dimensional breathable and cushioning middle layer is provided with an antibacterial and skin-friendly top layer, the anti-slip and wear-resistant bottom layer, the three-dimensional breathable and cushioning middle layer and the antibacterial and skin-friendly top layer are an integrated vulcanized composite structure, a vulcanized penetration bonding layer is formed between the layers of the anti-slip and wear-resistant bottom layer, the three-dimensional breathable and cushioning middle layer and the antibacterial and skin-friendly top layer, an anti-slip heel is provided on one side of the lower end of the anti-slip and wear-resistant bottom layer, anti-slip texture is provided on the lower surface of the anti-slip and wear-resistant bottom layer, a mesh micro-breathable channel is provided inside the three-dimensional breathable and cushioning middle layer, and the antibacterial and skin-friendly top layer are all modified rubber materials doped with chitosan-nano titanium dioxide composite antibacterial components.

[0007] By adopting the above technical solution, the three-layer structure interpenetrates and cross-links to form a vulcanized permeable bonding layer, completely avoiding the problems of delamination and edge lifting caused by long-term walking and bending. There is no situation where adhesive liquid blocks the breathable passage. The anti-slip heel and anti-slip texture improve the ground grip and anti-slip ability, and can serve as a channel outlet for the outward discharge of humid and hot gas. The chitosan-nano titanium dioxide composite antibacterial component can achieve long-term antibacterial effect throughout the entire sole of the rubber shoe without dead corners. Combined with the breathable structure inside the three-dimensional breathable cushioning middle layer, it can quickly dissipate the moisture and heat accumulated on the feet, destroying the humid and warm environment required for the growth of bacteria and mold from the source. It simultaneously achieves multiple functions such as wear resistance and anti-slip, cushioning and shock absorption, long-term antibacterial effect, and continuous breathability, greatly improving the comfort and hygiene of wearing for a long time.

[0008] In a preferred embodiment, the anti-slip and wear-resistant bottom layer, the three-dimensional breathable and cushioning middle layer, and the antibacterial and skin-friendly top layer are matched and matched with each other in terms of decreasing thickness from bottom to top.

[0009] By adopting the above technical solution, the anti-slip and wear-resistant bottom layer, as the load-bearing component that directly contacts the ground, is set as the thickest layer in the three-layer structure. This effectively improves the overall wear resistance, tear resistance, and impact resistance of the rubber shoe sole, making it suitable for long-term walking on rough roads in industrial and mining areas, fields, and outdoors. The three-dimensional breathable and cushioning middle layer is the next thickest, with ample internal space to form a complete mesh micro-ventilation channel, ensuring cushioning and rebound effects and the integrity of the ventilation channels. The antibacterial and skin-friendly top layer is the thinnest, directly conforming to the skin of the sole of the foot, shortening the distance that heat and sweat from the sole of the foot are conducted to the mesh micro-ventilation channel, and improving the speed of moisture wicking and breathability. The combination of the three layers with progressively decreasing thickness takes into account the three core usage needs of ground wear resistance, middle layer cushioning and breathability, and top layer skin-friendly dryness, resulting in a more reasonable distribution of structural stress.

[0010] In a preferred embodiment, the mesh micro-ventilation channel forms a three-dimensional mesh through-structure, with the channel being continuous without any breaks or dead angles.

[0011] By adopting the above technical solution, the entire airflow channel is continuous and uninterrupted, with no dead corners. When the human body walks and presses down on the antibacterial and skin-friendly top layer, the hot and humid gas in the shoe cavity can enter the mesh micro-ventilation channel from all directions and quickly diffuse along the multi-directional cross channels to the anti-slip texture of the anti-slip and wear-resistant bottom layer to be discharged, forming a reciprocating dynamic breathing and ventilation effect. There will be no local heat and moisture retention and accumulation, effectively solving the defects of insufficient ventilation and poor airflow of traditional shoe soles with a single through hole.

[0012] In a preferred embodiment, the antibacterial and skin-friendly top layer has a plurality of breathable micropores inside, and the breathable micropores are aligned vertically with the mesh micro-breathable channels.

[0013] By adopting the above technical solution, the breathable micropores and the mesh micro-breathable channels are precisely aligned and connected, allowing the heat and sweat vapor generated by the soles of the feet to pass directly through the breathable micropores into the mesh micro-breathable channels without being blocked by the dense rubber matrix of the antibacterial and skin-friendly top layer. This greatly improves the efficiency of heat and moisture conduction, ensuring that the moisture inside the shoe can be quickly channeled out and discharged, maintaining a dry environment for the soles of the feet.

[0014] In a preferred embodiment, the Shore hardness of the sole body of the rubber shoe is maintained at 55-65HA, and the tensile strength is not less than 18MPa.

[0015] By adopting the above technical solutions, the overall hardness of the rubber shoe sole is controlled within the range of 55-65HA. This avoids excessive hardness, which can cause foot discomfort and fatigue, while also preventing excessively soft soles and insufficient support. At the same time, the tensile strength of the rubber shoe sole is limited to no less than 18MPa. This ensures that the integrated structure of the three layers—the anti-slip and wear-resistant bottom layer, the three-dimensional breathable and cushioning middle layer, and the antibacterial and skin-friendly top layer—possesses excellent tensile and fracture resistance. Under conditions of heavy-duty walking, friction on rough surfaces, and repeated bending, the sole is less prone to breakage or cracks, thus extending the overall service life of the rubber shoe sole.

[0016] In a preferred embodiment, the modified rubber material is uniformly doped with chitosan-nano titanium dioxide composite antibacterial components and bamboo charcoal adsorption components.

[0017] By adopting the above technical solution, chitosan inhibits bacteria by destroying bacterial cell membranes through cationic action, while nano-titanium dioxide continuously decomposes bacteria and odor molecules through photocatalysis. The two work together to achieve broad-spectrum and long-lasting antibacterial effects. The bamboo charcoal adsorption component has a porous adsorption structure, which can quickly adsorb sweat from the soles of the feet, metabolize odors, and reduce the humidity inside the shoe cavity. The three work together to continuously exert antibacterial and deodorizing effects in the entire area of ​​the mesh micro-breathing channels, breathable micropores, and anti-slip texture. Even with long-term wear, it is not easy for odors and microorganisms to grow.

[0018] In a preferred embodiment, the vulcanization penetration bonding layer is an integrated transition structure formed by the mutual penetration and fusion of three functional layers under high-temperature vulcanization.

[0019] By adopting the above technical solution, the three layers of rubber sheets—anti-slip and wear-resistant bottom layer, three-dimensional breathable and cushioning middle layer, and antibacterial and skin-friendly top layer—are laminated and then subjected to high-temperature and high-pressure vulcanization treatment. The rubber molecular chains of each layer interpenetrate and melt into each other, forming a vulcanized and permeated bonding layer at the interlayer contact surface. This transitional structure does not contain any third-party media such as glue or adhesives, and the interlayer bonding strength is much higher than that of traditional bonded shoe soles. It will not delaminate after repeated bending and soaking in water, and at the same time, it will not cause problems such as glue blocking the mesh micro-breathing channels and breathable micropores, thus ensuring the long-term effectiveness of the shoe sole's breathable structure.

[0020] In a preferred embodiment, a connecting seal is provided on the outer side of the upper surface of the rubber shoe sole body.

[0021] By adopting the above technical solution, the connecting edge can serve as a sealing connection structure between the sole body and the upper of the rubber shoe. During vulcanization or bonding, it can fit tightly with the bottom of the upper, preventing mud and dust from the road surface from seeping into the shoe cavity through the gap between the sole and the upper. This also prevents sewage and impurities from entering the breathable micropores and mesh micro-breathing channels, causing channel blockage and the growth of dirt and bacteria, thus effectively protecting the breathable and antibacterial structure inside the sole.

[0022] In a preferred embodiment, a water-retaining raised strip is provided on the outer side of the lower surface of the main body of the rubber shoe sole.

[0023] By adopting the above technical solution, when walking on waterlogged roads, the water-blocking strips on the sides can prevent water from flowing back into the anti-slip texture and mesh micro-ventilation channels along the side wall of the sole, reducing water retention inside the ventilation channels and preventing the long-term retention of damp water from inducing the growth of bacteria and mold, thus further enhancing the overall effect of moisture-proofing and antibacterial properties of the sole.

[0024] In a preferred embodiment, the steps include:

[0025] S1. The raw material mixing operation is completed by a closed internal mixer. The ternary rubber base material is added according to the formula ratio and plasticized at 80-90℃. Then, the temperature is cooled to 60-70℃, and chitosan-nano titanium dioxide composite antibacterial component, bamboo charcoal adsorption component and various processing aids are added in sequence. The mixture is mixed at a constant temperature in stages. Finally, sulfur is added and mixed for a short time to remove the glue. The temperature is controlled by a cooling water circulation unit throughout the process to ensure that the antibacterial component is evenly dispersed and has stable activity.

[0026] S2. The modified uniformly mixed rubber is fed into a four-roll precision calender. According to the thickness parameters of the three-layer sole structure, the anti-slip and wear-resistant bottom layer rubber sheet, the three-dimensional breathable and cushioning middle layer rubber sheet, and the antibacterial and skin-friendly top layer rubber sheet are calendered respectively. The thickness of each layer of rubber sheet is precisely controlled by adjusting the gap of the calendering rollers. Then, the sheet is cut to length by a flatbed cutting machine to obtain a regular three-layer functional rubber sheet.

[0027] S3. A servo stamping unit is used with a dedicated replaceable mold to stamp the middle layer film and the bottom layer film respectively. The middle layer is stamped with a dedicated mold to form a mesh micro ventilation channel, and the bottom layer is stamped with a dedicated mold to form a diamond anti-slip texture and longitudinal guide groove, ensuring that the dimensions of each fine structure are accurate, without deformation or blockage.

[0028] S4. Stack the three-layer film from top to bottom and put it into the low temperature hydraulic pre-press machine. Pre-press for 3-5 minutes at 50-60℃ and 3-5MPa. The micropores and channel structure are protected by the flexible protective pad on the surface of the pressure plate, so as to achieve gapless bonding and positioning of the three-layer film.

[0029] S5. Place the pre-pressed and bonded sole blank into the preheated vulcanization mold, and vulcanize it for 12-18 minutes at 145-155℃ and 8-12MPa using a fully automatic hydraulic vulcanizing machine, so that the interface of the three-layer film forms a vulcanization penetration bonding layer, and the whole sole blank is integrally composite molded.

[0030] S6. After vulcanization, the shoes are demolded and cooled and shaped at a constant speed on a room temperature cooling and shaping conveyor. Edges and waste are removed by a sole trimming and grinding machine. Finally, a high-pressure micro-airflow detector is used to test the conductivity of all breathable micropores and mesh micro-breathable channels. The hardness and tensile strength of the rubber shoe sole are tested by mechanical testing equipment, and qualified finished products are selected.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] In this invention, the three-layer structure's contact surfaces interpenetrate and cross-link to form a vulcanized permeable bonding layer, completely avoiding the problems of delamination and edge lifting caused by long-term walking and bending. There is no situation where adhesive liquid blocks the breathable passages. The anti-slip heel and anti-slip texture enhance the ground grip and anti-slip ability, and can serve as a channel outlet for the outward discharge of humid and hot gas. The chitosan-nano titanium dioxide composite antibacterial component can achieve long-lasting antibacterial effect throughout the entire sole of the rubber shoe without dead corners. Combined with the breathable structure inside the three-dimensional breathable cushioning middle layer, it can quickly dissipate the moisture and heat accumulated on the feet, destroying the humid and warm environment required for the growth of bacteria and mold from the source. It simultaneously achieves multiple functions such as wear resistance and anti-slip, cushioning and shock absorption, long-lasting antibacterial effect, and continuous breathability, greatly improving the comfort and hygiene of wearing for a long time. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the front structure of the rubber shoe sole in this invention;

[0034] Figure 2 This is a schematic diagram of the bottom structure of the rubber shoe sole in this invention;

[0035] Figure 3 This is a schematic diagram of the internal structure of the sole of the rubber shoe in this invention;

[0036] Figure 4 This is a schematic diagram of the internal structure of the antibacterial and skin-friendly top layer in this invention.

[0037] Marked in the picture: 1. Main body of rubber shoe sole; 2. Anti-slip heel; 3. Connecting edge seal; 4. Water-retaining raised strip around the edge; 5. Anti-slip texture; 6. Anti-slip and wear-resistant bottom layer; 7. Three-dimensional breathable and cushioning middle layer; 8. Mesh micro-breathable channels; 9. Antibacterial and skin-friendly top layer; 10. Breathable micropores. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Reference Figure 1-4An antibacterial and breathable rubber shoe sole includes a main body 1. The bottom of the main body 1 has an anti-slip and wear-resistant bottom layer 6. A three-dimensional breathable and cushioning middle layer 7 is located above the anti-slip and wear-resistant bottom layer 6. An antibacterial and skin-friendly top layer 9 is located above the three-dimensional breathable and cushioning middle layer 7. The anti-slip and wear-resistant bottom layer 6, the three-dimensional breathable and cushioning middle layer 7, and the antibacterial and skin-friendly top layer 9 form an integrated vulcanized composite structure. A vulcanized penetration bonding layer is formed between the layers of the anti-slip and wear-resistant bottom layer 6, the three-dimensional breathable and cushioning middle layer 7, and the antibacterial and skin-friendly top layer 9. An anti-slip heel 2 is located on one side of the lower end of the anti-slip and wear-resistant bottom layer 6. Anti-slip textures 5 are formed on the lower surface of the anti-slip and wear-resistant bottom layer 6. Mesh micro-ventilation channels 8 are provided inside the three-dimensional breathable and cushioning middle layer 7. The anti-slip and wear-resistant bottom layer 6, the three-dimensional breathable and cushioning middle layer 7, and the antibacterial and skin-friendly top layer 9 are all composite materials. The modified rubber material with chitosan-nano titanium dioxide composite antibacterial components has a three-layer structure where the contact surfaces permeate and cross-link to form a vulcanized permeable bonding layer. This completely avoids the problems of delamination and edge lifting caused by long-term walking and bending. There is no situation where adhesive liquid blocks the breathable passage. The anti-slip heel 2 and anti-slip pattern 5 enhance the grip and anti-slip ability on the ground and can act as a channel outlet for the outward discharge of humid and hot gas. The chitosan-nano titanium dioxide composite antibacterial components can achieve long-lasting antibacterial effect throughout the entire sole body 1 of the rubber shoe. Combined with the breathable structure inside the three-dimensional breathable cushioning middle layer 7, it can quickly dissipate the moisture and heat accumulated on the feet, destroying the humid and warm environment required for the growth of bacteria and mold from the source. It can simultaneously achieve multiple functions such as wear resistance and anti-slip, cushioning and shock absorption, long-lasting antibacterial effect, and continuous breathability, which can greatly improve the comfort and hygiene of wearing for a long time.

[0040] Reference Figure 3 The anti-slip and wear-resistant bottom layer 6, the three-dimensional breathable and cushioning middle layer 7, and the antibacterial and skin-friendly top layer 9 are matched and matched with each other with a progressively decreasing thickness from bottom to top. The anti-slip and wear-resistant bottom layer 6, as the load-bearing component that directly contacts the ground, is set as the thickest layer in the three-layer structure, which can effectively improve the overall wear resistance, tear resistance, and impact resistance of the main body 1 of the rubber shoe sole, making it suitable for long-term walking on rough roads in mining, fields, and outdoors. The three-dimensional breathable and cushioning middle layer 7 is the next thickest, and the ample internal space can form a complete mesh micro-ventilation channel 8, ensuring the cushioning rebound effect and the integrity of the ventilation channel. The antibacterial and skin-friendly top layer 9 is the thinnest, directly adhering to the skin of the human foot, shortening the distance of the foot's heat and sweat to be conducted to the mesh micro-ventilation channel 8, and improving the speed of moisture wicking and breathability. The combination of the three layers with progressively decreasing thickness takes into account the three core usage needs of ground wear resistance, middle layer cushioning and breathability, and top layer skin-friendly dryness, and the structural stress distribution is more reasonable.

[0041] Reference Figure 3The mesh micro-ventilation channel 8 forms a three-dimensional mesh-like through-structure. The channel is continuous without any breaks or dead corners. The entire airflow channel is continuous without any breaks or dead corners. When the human body walks and presses down on the antibacterial and skin-friendly top layer 9, the hot and humid gas in the shoe cavity can enter the mesh micro-ventilation channel 8 from all directions. It can then quickly diffuse along the multi-directional intersecting channels to the anti-slip texture 5 of the anti-slip and wear-resistant bottom layer 6 and be discharged. This forms a reciprocating dynamic breathing and ventilation effect, and there will be no localized accumulation of hot and humid gas. This effectively solves the defects of insufficient ventilation and poor airflow of traditional shoe soles with a single through-hole.

[0042] Reference Figure 3-4 The antibacterial and skin-friendly top layer 9 has several breathable micropores 10 inside. The breathable micropores 10 and the mesh micro-breathable channels 8 are aligned vertically and connected vertically. The heat and sweat generated by the soles of the feet can directly pass through the breathable micropores 10 into the mesh micro-breathable channels 8 without being blocked by the dense rubber matrix of the antibacterial and skin-friendly top layer 9. This greatly improves the efficiency of heat and moisture conduction and ensures that the moisture inside the shoe can be quickly discharged to the outside, maintaining a dry environment for the soles of the feet.

[0043] Reference Figure 1-2 The Shore hardness of the main body 1 of the rubber shoe sole is maintained at 55-65HA, and the tensile strength is not less than 18MPa. Controlling the overall hardness of the main body 1 of the rubber shoe sole within the range of 55-65HA avoids the problem of foot discomfort and walking fatigue caused by excessive hardness, while also preventing the problem of soft sole and insufficient support caused by excessive hardness. At the same time, limiting the tensile strength of the main body 1 of the rubber shoe sole to not less than 18MPa ensures that the three-layer integrated structure of the anti-slip and wear-resistant bottom layer 6, the three-dimensional breathable and cushioning middle layer 7, and the antibacterial and skin-friendly top layer 9 has excellent tensile and fracture resistance. Under heavy walking, friction on rough ground, and repeated bending conditions, it is not easy for the sole to break or crack, thus extending the overall service life of the main body 1 of the rubber shoe sole.

[0044] Reference Figure 1-2 The modified rubber material is uniformly doped with chitosan-nano titanium dioxide composite antibacterial components and bamboo charcoal adsorption components. Chitosan inhibits bacteria by destroying bacterial cell membranes through cationic action, while nano titanium dioxide continuously decomposes bacteria and odor molecules through photocatalysis. The two work together to achieve broad-spectrum and long-lasting antibacterial effects. The bamboo charcoal adsorption component has a porous adsorption structure that can quickly adsorb sweat from the soles of the feet, metabolize odors, and reduce humidity inside the shoe cavity. The three work together to continuously exert antibacterial and deodorizing effects in the entire area of ​​the mesh micro-breathing channels 8, breathable micropores 10, and anti-slip texture 5, so that even with long-term wear, it is not easy for odors and microorganisms to grow.

[0045] Reference Figure 1-2The vulcanized permeation bonding layer is an integrated transitional structure formed by the mutual permeation and fusion of three functional layers under high-temperature vulcanization. The three layers of rubber sheets, namely the anti-slip and wear-resistant bottom layer 6, the three-dimensional breathable and cushioning middle layer 7, and the antibacterial and skin-friendly top layer 9, are laminated and then subjected to high-temperature and high-pressure vulcanization treatment. The rubber molecular chains of each layer interpenetrate and melt into each other, forming a vulcanized permeation bonding layer at the interlayer contact surface. This transitional structure does not contain any third-party media such as glue or adhesives, and the interlayer bonding strength is much higher than that of traditional adhesive soles. It will not delaminate after repeated bending and soaking in water, and at the same time, it will not cause the problem of glue blocking the mesh micro-breathing channels 8 and breathable micropores 10, thus ensuring the long-term effectiveness of the breathable structure of the sole.

[0046] Reference Figure 1 The upper outer surface of the rubber shoe sole body 1 is provided with a connecting edge 3. The connecting edge 3 can serve as a connecting structure for sealing the rubber shoe sole body 1 with the shoe upper. During vulcanization or bonding, it can fit tightly with the bottom of the shoe upper, preventing mud and dust from the road surface from seeping into the shoe cavity through the gap between the sole and the shoe upper. It also prevents sewage and impurities from entering the breathable micropores 10 and the mesh micro-breathable channels 8, causing channel blockage and the growth of dirt and bacteria, thus effectively protecting the breathable and antibacterial structure inside the sole.

[0047] Reference Figure 2 The outer side of the lower surface of the sole body 1 of the rubber shoe is provided with a water-blocking protrusion 4. When walking on a waterlogged road, the water-blocking protrusion 4 can prevent the water on the road surface from flowing back into the anti-slip pattern 5 and the mesh micro-ventilation channel 8 along the side wall of the sole, reducing the water retention inside the ventilation channel and preventing the long-term retention of damp water from inducing the growth of bacteria and mold, thus further enhancing the overall effect of moisture-proof and antibacterial properties of the sole.

[0048] Reference Figure 1-4 This includes the following steps:

[0049] S1. The raw material mixing operation is completed by a closed internal mixer. The ternary rubber base material is added according to the formula ratio and plasticized at 80-90℃. Then, the temperature is cooled to 60-70℃, and chitosan-nano titanium dioxide composite antibacterial component, bamboo charcoal adsorption component and various processing aids are added in sequence. The mixture is mixed at a constant temperature in stages. Finally, sulfur is added and mixed for a short time to remove the glue. The temperature is controlled by a cooling water circulation unit throughout the process to ensure that the antibacterial component is evenly dispersed and has stable activity.

[0050] S2. The modified uniformly mixed rubber is fed into a four-roll precision calender. According to the thickness parameters of the three-layer sole structure, the anti-slip and wear-resistant bottom layer rubber sheet, the three-dimensional breathable and cushioning middle layer rubber sheet, and the antibacterial and skin-friendly top layer rubber sheet are calendered respectively. The thickness of each layer of rubber sheet is precisely controlled by adjusting the gap of the calendering rollers. Then, the sheet is cut to length by a flatbed cutting machine to obtain a regular three-layer functional rubber sheet.

[0051] S3. A servo stamping unit is used with a special replaceable mold to stamp the middle layer film and the bottom layer film respectively; the middle layer special mold is used to stamp and form a mesh micro ventilation channel 8, and the bottom layer special mold is used to stamp and form a diamond anti-slip texture and longitudinal guide groove, ensuring that the dimensions of each fine structure are accurate, without deformation and without blockage.

[0052] S4. Stack the three-layer film from top to bottom and put it into the low temperature hydraulic pre-press machine. Pre-press for 3-5 minutes at 50-60℃ and 3-5MPa. The micropores and channel structure are protected by the flexible protective pad on the surface of the pressure plate, so as to achieve gapless bonding and positioning of the three-layer film.

[0053] S5. Place the pre-pressed and bonded sole blank into the preheated vulcanization mold, and vulcanize it for 12-18 minutes at 145-155℃ and 8-12MPa using a fully automatic hydraulic vulcanizing machine, so that the interface of the three-layer film forms a vulcanization penetration bonding layer, and the whole sole blank is integrally composite molded.

[0054] S6. After vulcanization, the shoes are demolded and cooled and shaped at a constant speed on a room temperature cooling and shaping conveyor. Edges and waste are removed by a shoe sole trimming and grinding machine. Finally, the conductivity of all breathable micropores 10 and mesh micro-breathable channels 8 is tested by a high-pressure micro-airflow detector. The hardness and tensile strength of the rubber shoe sole body 1 are tested by mechanical testing equipment, and qualified finished products are selected.

[0055] The implementation principle of the present invention, which describes an antibacterial and breathable rubber shoe sole and its production method, is as follows:

[0056] During actual wear and use, the sole of the rubber shoe 1 is tightly sealed to the bottom of the upper by the connecting edge 3 around its outer surface, which can prevent mud, water, and dust from seeping in from the gap between the shoe body and the sole, and prevent impurities from clogging the breathable micropores 10 and the mesh micro-breathing channels 8. When walking, the sole of the human foot continuously presses down on the antibacterial and skin-friendly top layer 9, and the heat and sweat generated by the foot can pass through the evenly distributed breathable micropores 10 inside the antibacterial and skin-friendly top layer 9 layer by layer. The 10 and the three-dimensional breathable cushioning middle layer 7 are precisely aligned and connected to the mesh micro-breathable channels 8 inside. Moist and hot air can be completely introduced into the three-dimensional mesh micro-breathable channels 8. With the help of the continuous three-dimensional channels without any gaps or dead corners, the air is dispersed and flows to the four sides of the sole body 1 of the rubber shoe. Finally, it is discharged outward through the anti-slip texture 5 opened on the lower surface of the anti-slip and wear-resistant bottom layer 6, forming a dynamic breathing breathable cycle of air intake when stepping on and air exhaust when lifting the foot, continuously ventilating the moisture inside the shoe cavity and maintaining a dry environment for the soles of the feet.

[0057] The integrated water-blocking raised strip 4 on the outer side of the lower surface of the rubber shoe sole 1 can prevent water from flowing back into the anti-slip pattern 5 and the mesh micro-ventilation channel 8 when passing through waterlogged roads, thus preventing water from accumulating inside the channel and reducing the conditions for bacterial and mold growth from an environmental perspective. At the same time, the anti-slip heel 2 set on one side of the lower end of the anti-slip and wear-resistant bottom layer 6, together with the full anti-slip pattern 5, greatly improves the grip and friction between the sole and the ground, taking into account both anti-slip walking and air flow.

[0058] The three layers—the anti-slip and wear-resistant bottom layer (6), the three-dimensional breathable and cushioning middle layer (7), and the antibacterial and skin-friendly top layer (9)—are all made of modified rubber with chitosan-nano titanium dioxide composite antibacterial components and bamboo charcoal adsorption components. Chitosan inhibits microbial growth by destroying bacterial cell membranes with cations, while nano titanium dioxide continuously decomposes bacteria and odor molecules through photocatalysis. The porous structure of bamboo charcoal effectively adsorbs sweat odor. These three functional components are evenly dispersed in the three rubber matrices, continuously exerting antibacterial and deodorizing effects in the entire area of ​​the breathable micropores (10), mesh micro-breathable channels (8), and anti-slip texture (5), achieving long-lasting antibacterial effect throughout the entire sole.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An antibacterial and breathable rubber shoe sole, comprising a rubber shoe sole body (1), characterized in that: The bottom of the sole body (1) of the rubber shoe is provided with an anti-slip and wear-resistant bottom layer (6), the upper end of the anti-slip and wear-resistant bottom layer (6) is provided with a three-dimensional breathable and cushioning middle layer (7), and the upper end of the three-dimensional breathable and cushioning middle layer (7) is provided with an antibacterial and skin-friendly top layer (9). The anti-slip and wear-resistant bottom layer (6), the three-dimensional breathable and cushioning middle layer (7) and the antibacterial and skin-friendly top layer (9) are an integrated vulcanized composite structure. A vulcanized penetration bonding layer is formed between the layers of layer (9). An anti-slip heel (2) is provided on one side of the lower end of the anti-slip and wear-resistant bottom layer (6). Anti-slip texture (5) is provided on the lower surface of the anti-slip and wear-resistant bottom layer (6). A mesh micro-ventilation channel (8) is provided inside the three-dimensional breathable cushioning middle layer (7). The anti-slip and wear-resistant bottom layer (6), the three-dimensional breathable cushioning middle layer (7) and the antibacterial and skin-friendly top layer (9) are all modified rubber materials doped with chitosan-nano titanium dioxide composite antibacterial components.

2. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The anti-slip and wear-resistant bottom layer (6), the three-dimensional breathable and cushioning middle layer (7), and the antibacterial and skin-friendly top layer (9) are matched and matched with each other with a progressively decreasing thickness from bottom to top.

3. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The mesh micro-ventilation channel (8) forms a three-dimensional mesh through structure, with the channel being continuous without any breaks or dead angles.

4. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The antibacterial and skin-friendly top layer (9) has several breathable micropores (10) inside, and the breathable micropores (10) are arranged vertically and vertically with the mesh micro breathable channels (8).

5. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The Shore hardness of the sole body (1) of the rubber shoe is maintained at 55-65HA, and the tensile strength is not less than 18MPa.

6. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The modified rubber material is internally uniformly doped with chitosan-nano titanium dioxide composite antibacterial components and bamboo charcoal adsorption components.

7. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The vulcanized penetration bonding layer is an integrated transition structure formed by the mutual penetration and fusion of three functional layers under high-temperature vulcanization.

8. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The outer side of the upper surface of the rubber shoe sole body (1) is provided with a connecting seal (3).

9. The antibacterial and breathable rubber shoe sole according to claim 1, characterized in that: The outer side of the lower surface of the main body (1) of the rubber shoe sole is provided with a water-blocking protrusion (4).

10. The antibacterial and breathable rubber shoe sole and its production method according to claims 1-9, characterized in that: Includes the following steps: S1. The raw material mixing operation is completed by a closed internal mixer. The ternary rubber base material is added according to the formula ratio and plasticized at 80-90℃. Then, the temperature is cooled to 60-70℃, and chitosan-nano titanium dioxide composite antibacterial component, bamboo charcoal adsorption component and various processing aids are added in sequence. The mixture is mixed at a constant temperature in stages. Finally, sulfur is added and mixed for a short time to remove the glue. The temperature is controlled by a cooling water circulation unit throughout the process to ensure that the antibacterial component is evenly dispersed and has stable activity. S2. The modified uniformly mixed rubber is fed into a four-roll precision calender. According to the thickness parameters of the three-layer sole structure, the anti-slip and wear-resistant bottom layer rubber sheet, the three-dimensional breathable and cushioning middle layer rubber sheet, and the antibacterial and skin-friendly top layer rubber sheet are calendered respectively. The thickness of each layer of rubber sheet is precisely controlled by adjusting the gap of the calendering rollers. Then, the sheet is cut to length by a flatbed cutting machine to obtain a regular three-layer functional rubber sheet. S3. A servo stamping unit is used with a special replaceable mold to stamp the middle layer film and the bottom layer film respectively; the middle layer special mold is used to stamp and form a mesh micro ventilation channel (8), and the bottom layer special mold is used to stamp and form a diamond anti-slip pattern and a longitudinal guide groove to ensure that the dimensions of each fine structure are accurate, without deformation and without blockage. S4. Stack the three-layer film from top to bottom and put it into the low temperature hydraulic pre-press machine. Pre-press for 3-5 minutes at 50-60℃ and 3-5MPa. The micropores and channel structure are protected by the flexible protective pad on the surface of the pressure plate, so as to achieve gapless bonding and positioning of the three-layer film. S5. Place the pre-pressed and bonded sole blank into the preheated vulcanization mold, and vulcanize it for 12-18 minutes at 145-155℃ and 8-12MPa using a fully automatic hydraulic vulcanizing machine, so that the interface of the three-layer film forms a vulcanization penetration bonding layer, and the whole sole blank is integrally composite molded. S6. After vulcanization, the product is demolded and cooled and shaped at a constant speed on a room temperature cooling and shaping conveyor. The edge and corner waste is removed by a shoe sole trimming and grinding machine. Finally, the conductivity of all breathable micropores (10) and mesh micro breathable channels (8) is tested by a high-pressure micro airflow detector. The hardness and tensile strength of the rubber shoe sole body (1) are tested by a mechanical testing device, and qualified finished products are selected.

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