Shoe insole production process and shoe insole

Abstract

The invention relates to a shoe insole production process which comprises the following steps: firstly, cutting a thermoplastic elastomer foamed plate into strip-shaped covered edges and an insole plate; secondly, the covered edge is attached to the periphery of the middle bottom plate to form an inner cavity, and a first-stage shoe middle sole is obtained; finally, the functional film material and the lower end face of the first-stage shoe insole are aligned and placed into a mold, the mold is heated to the specific temperature, the temperature is kept for a certain time and then cooled, and the finished shoe insole is taken out. According to the process, TPU, TPEE, PEBA and other materials can be used, and the covered edge and the middle bottom plate can be cut and attached by adopting plates of different materials or densities. The laminating method is diversified and comprises hot air, hot knife, glue, adhesive sticker or hot melt adhesive laminating. The heating mode can be steam, hot air, hot pressing, electricity or heat conduction oil heating. By accurately controlling the temperature and time, the production efficiency is improved, the cost is reduced, and the product performance is enhanced.

Description

Technical Field

[0001] The invention specifically relates to a shoe midsole production process and a shoe midsole. Background Art

[0002] The midsole is an important part of sports shoes. It is located between the insole and the outsole. Its main function is to provide cushioning, support and energy rebound, absorb impact during exercise, protect the feet and improve comfort. In terms of structure, the midsole is mainly composed of a midsole plate and an outer edging. The midsole plate mainly refers to the main part corresponding to the sole of the foot, and the outer edging mainly refers to the structure wrapped around the periphery of the midsole plate. There is an inner cavity between the midsole plate and the outer edging. The inner cavity is mainly used to cooperate with insoles, soles and other components to form a complete sole. In terms of production technology, it is usually made of foam materials such as EVA, PU, ​​and TPU. Different materials and processes will affect the performance and durability of the midsole.

[0003] The use of EVA materials to make shoe midsoles requires the following steps: raw material preparation, mixing, cutting, vulcanization, cooling, peeling, cutting, chopping and polishing. Therefore, the shoe midsole is formed in one piece, that is, the midsole plate and the outer edge of the shoe midsole are formed in one piece, and then the required inner cavity is processed by cutting, polishing and other methods.

[0004] The above process has a large waste of materials, especially when processing the inner cavity, a lot of materials will be cut and polished, resulting in great waste. Although EVA material can be reused, its reuse process is more complicated and time-consuming than TPU, so it is not the best choice.

[0005] Furthermore, processes such as cutting and polishing require high skills and experience from workers to ensure that the shape, size and surface quality of the midsole meet the design requirements. Manufacturers usually need to hire experienced workers to operate them, so the labor costs are relatively high.

[0006] Furthermore, during the one-piece molding process, if the quality of the raw materials is unstable or the production process parameters are not properly controlled, the quality of the midsole will easily become unstable. In addition, the accuracy of processes such as cutting and polishing will also affect the shape and size stability of the midsole. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a shoe midsole production process and a shoe midsole in view of the deficiencies of the above-mentioned prior art, which not only solves the problems of material waste, high labor cost, unstable product quality, etc. in the traditional EVA shoe midsole production process, but also achieves the improvement of production efficiency, reduction of cost and enhancement of product performance by adopting TPU material and efficient bonding technology.

[0008] To achieve the above object, the present invention provides the following technical solutions: The production process of the shoe midsole is characterized by comprising the following steps: Step 1: Cut the thermoplastic elastomer foam sheet into strip-shaped edging and a midsole sheet with a sole shape; Step 2: Fit the edge of the hem to the outer periphery of the midsole plate along the outer edge of the midsole plate to form a circle, align the lower edge of the hem with the edge of the lower end surface of the midsole plate, and the upper edge of the hem is higher than the upper end surface of the midsole plate and the two form an inner cavity, thereby obtaining a first-stage shoe midsole; Step 3: After cutting the functional film material into the shape of the lower end surface of the first-stage midsole, align it with the lower end surface of the first-stage shoe midsole and put it into the mold, close the mold, and then heat the mold to temperature T1 and keep it for time t1, then reduce the mold temperature to temperature T2 and keep it for time t2. Take out the shoe midsole to obtain the finished shoe midsole.

[0009] By adopting the above technical scheme, the thermoplastic elastomer foam sheet is first accurately cut into two parts, the edge and the midsole plate, and then assembled into a molding method, thereby avoiding a large number of cutting and grinding steps in the traditional one-piece molding process, thereby greatly reducing material waste. This split processing method of the thermoplastic elastomer foam sheet enables each piece of material to be accurately utilized, which not only reduces the production cost, but also conforms to the current green and environmentally friendly production concept. The shoe midsole production process designed in this application eliminates the complicated cutting and grinding processes, has relatively low technical requirements for workers, and does not need to rely on highly skilled workers to operate. This not only simplifies the production process and shortens the production cycle, but also reduces the labor cost caused by hiring highly skilled workers. At the same time, due to the reduction of labor, the stability and controllability of the production process are further improved. The thermoplastic elastomer foam sheet is used in combination with hot melt adhesive bonding technology to ensure a firm connection between the edge and the midsole plate, and through precise temperature control, the hot melt adhesive is melted and penetrated and then cooled to form, which effectively avoids the size change caused by the thermal expansion and contraction of the material, and improves the size stability and shape accuracy of the shoe midsole. In addition, the thermoplastic elastomer foam sheet itself has excellent wear resistance, elasticity and tear resistance. The final shoe midsole is more durable, improving wearing comfort and service life.

[0010] The above-mentioned shoe midsole production process can be further configured as follows: in step 1, the thermoplastic elastomer foam sheet includes thermoplastic polyurethane elastomer (TPU) or thermoplastic polyester elastomer (TPEE) or thermoplastic nylon elastomer (PEBA) or TPU thermoplastic elastomer foam sheet.

[0011] With the above technical solution, firstly, the above materials all have excellent elasticity and recovery, which are the key elements of shoe midsole performance. TPU has good wear resistance, tear strength and elasticity, so that the shoe midsole can still maintain good shape and performance after long-term wear and repeated bending. TPEE has good weather resistance, oil resistance and chemical resistance, which provides a wider range of applicable environments and longer service life for shoe midsoles. PEBA has good compression permanent deformation and excellent low-temperature performance, ensuring the stability and comfort of shoe midsoles under extreme conditions. Secondly, these thermoplastic elastomer foam sheets all have good processing performance. They can all be processed by thermoforming, injection molding and other processes, and the processing temperature is moderate and easy to control, which helps to reduce production costs and improve production efficiency. At the same time, the above materials are not easy to produce harmful substances during the processing process, meet environmental protection requirements, and are conducive to sustainable development. In addition, the above materials also have excellent lightweight characteristics. Through foaming treatment, the density of the material can be further reduced, thereby reducing the weight of the shoe midsole and improving the lightness of wearing. Finally, these thermoplastic elastomer foam boards also have good recyclability. They can be recycled and reused after being discarded, reducing resource waste and environmental pollution, which is in line with the concept of green manufacturing.

[0012] The above-mentioned shoe midsole production process can be further configured as follows: the strip edging length in step 1 should be less than or equal to the sole shape of the midsole plate, and the strip edging has an undulating arc and fits the outer edge appearance of the shoe midsole.

[0013] By adopting the above technical solution, the length setting of the strip edge ensures its close fit with the midsole plate. When the edge length is equal to or slightly less than the length of the midsole plate, wrinkles or gaps can be effectively avoided during the fitting process, thereby enhancing the edge strength of the midsole and the stability of the overall structure. This close fit also helps to reduce the wear of the material during wearing and extend the service life of the midsole. Furthermore, the strip edge has a corresponding undulating curvature, which conforms to the ergonomic principle and can better fit the outer edge of the midsole. Such a design not only enhances the aesthetic appearance of the midsole, but more importantly, it enhances the comfort and stability when worn. The undulating curvature can better match the contour of the wearer's foot, reduce friction and discomfort, and thus enhance the wearing experience. Furthermore, when cutting and fitting the edge, precise length and curvature control can reduce errors and waste and improve the utilization rate of materials.

[0014] The above-mentioned shoe midsole production process can be further configured as follows: as described in step one, the edging and the midsole plate can be obtained by cutting thermoplastic elastomer foam plates of the same or different materials or different densities; as described in step one, the midsole plate can be obtained by cutting and bonding one or more layers of thermoplastic elastomer foam plates of the same or different materials or different densities of the same shape.

[0015] By adopting the above technical solution, by selecting thermoplastic elastomer foamed sheets of the same or different materials and different densities, shoe midsoles with different characteristics can be customized according to the actual needs of customers. For example, a sheet with a higher density can be selected to increase the support and durability of the shoe midsole, or a sheet with a lower density can be selected to improve the lightness and comfort of the shoe midsole. This flexibility in material selection enables the shoe midsole to better adapt to the needs and preferences of different consumers. Furthermore, the midsole plate can be selectively obtained by cutting and bonding one or more layers of sheets of the same shape, which enhances the structural design and performance optimization of the shoe midsole. The multi-layer structure of the midsole plate can be stacked with sheets of different materials or densities according to the needs of customers to achieve specific performance goals. For example, a higher density sheet can be used on the bottom layer of the midsole plate to provide stable support, while a lower density sheet can be used on the upper layer to improve the tactile comfort of the sole.

[0016] The above-mentioned shoe midsole production process can be further configured as follows: as described in step 2, the method of bonding the edge to the periphery of the midsole plate includes hot air bonding, hot knife bonding, glue bonding, self-adhesive bonding, or hot melt adhesive bonding.

[0017] With the above technical solution, hot air bonding softens the surface of the material by heating, making it easier to achieve a tight fit, while avoiding the use of adhesives such as glue, simplifying the production process. Hot knife bonding uses the cutting and melting action of a high-temperature blade to bond the hemming and midsole plate while cutting, improving production efficiency. Glue bonding, self-adhesive bonding, and hot melt adhesive bonding use adhesives to fix the two together. These methods are simple to operate, suitable for midsoles of various shapes and structures, and have high bonding strength, ensuring the stability and durability of the product.

[0018] The above-mentioned shoe midsole production process can be further configured as follows: when the edge and the periphery of the midsole plate are bonded with hot melt adhesive, the hot melt adhesive needs to be heated to a temperature at the melting point of the hot melt adhesive and lower than the temperature of the thermoplastic elastomer foam board, and then the hot melt adhesive is fully infiltrated between the edge and the midsole plate, and the midsole plate and the edge are kept in a pressed state by mold pressing, manual pressing, or roller pressing, and then the hot melt adhesive is cooled to below the melting point of the hot melt adhesive to firmly bond the edge and the midsole together; the material of the hot melt adhesive includes EVA hot melt adhesive, PA hot melt adhesive, PES hot melt adhesive, or TPU hot melt adhesive, and the melting point of the hot melt adhesive is between 100°C and 160°C.

[0019] Adopting the above technical solution ensures that the hot melt adhesive can fully penetrate between the edge binding and the middle sole plate, forming a uniform adhesive layer. Through methods such as die pressing, manual pressing, or roller pressing, it can ensure that the middle sole plate and the edge binding maintain close contact during the bonding process, avoiding the generation of bubbles or voids. At the same time, after the hot melt adhesive cools below its melting point, it can quickly solidify, forming a strong adhesive force to ensure the firm fitting of the edge binding and the middle sole plate. Hot melt adhesive materials such as EVA hot melt adhesive, PA hot melt adhesive, PES hot melt adhesive, and TPU hot melt adhesive have different physical and chemical properties. According to the characteristics of the thermoplastic elastomer foamed sheet and the design requirements of the shoe midsole, the most suitable hot melt adhesive material can be selected. At the same time, the melting point temperatures of these hot melt adhesive materials are between 100°C and 160°C, which match the heating temperature of the thermoplastic elastomer foamed sheet, avoiding damage to the thermoplastic elastomer foamed sheet due to excessive temperature.

[0020] The above-mentioned shoe midsole production process can be further set as follows: The functional film material described in step three includes a rubber shoe outsole coated with hot melt adhesive, a TPU shoe outsole coated with hot melt adhesive, or a PU shoe outsole coated with hot melt adhesive, and the melting point temperature of the coated hot melt adhesive is between 100 - 160 degrees.

[0021] Adopting the above technical solution, selectively using a TPU shoe outsole or a PU shoe outsole coated with hot melt adhesive and combining with a hot melt adhesive with an appropriate melting point for coating not only enhances the abrasion resistance, anti-slip performance, and elasticity of the shoe midsole, but also ensures a firm bond with the middle sole plate, improving the overall comfort and durability of the shoe. At the same time, the melting point range of the hot melt adhesive is properly selected, which not only ensures the bonding effect but also avoids the negative impact of high temperature on the material properties, improving the stability and controllability of the production process.

[0022] The above-mentioned shoe midsole production process can be further set as follows: The method of heating inside the mold described in step three includes steam heating, hot air heating, hot pressing heating, electric heating, or heat transfer oil heating.

[0023] Adopting the above technical solution, steam heating and hot air heating can quickly transfer heat to the materials inside the mold, achieving rapid temperature rise, and the heating is relatively uniform, which helps to reduce the temperature gradient inside the materials and avoid material deformation or cracking caused by thermal stress. Hot pressing heating can apply pressure while heating, which helps the close fitting and fusion of materials. Electric heating and heat transfer oil heating have higher heating accuracy and controllability, and can perform precise temperature adjustment according to specific process requirements.

[0024] The above-mentioned shoe midsole production process can be further set as follows: 100°C < T1 < the melting point of the thermoplastic elastomer foamed sheet, 30s < t1 < 3600s, 0°C < T2 < 80°C, 30s < t2 < 3600s.

[0025] By adopting the above technical solution, the heating temperature T1 is set between 100°C and the melting point of the thermoplastic elastomer foam sheet, which ensures that the thermoplastic elastomer foam sheet will not melt and deform due to excessively high temperature during the heating process, nor will it fail to achieve the expected softening effect due to too low temperature, which is convenient for hot melt adhesive melting and mold embossing. The cooling temperature T2 is set between 0°C and 80°C to avoid the thermoplastic elastomer foam sheet from shrinking or cracking rapidly due to too low temperature during the cooling process, and also prevents it from failing to effectively solidify due to too high temperature. Preferably, 120°C <T1<160℃,60s<t1<1200s,20℃<T2<60℃,60s<t2<1200s。

[0026] A shoe midsole comprises a midsole plate and an edge, wherein the edge and the midsole plate are fitted in a circle along the outer periphery of the midsole plate, the lower side of the edge is aligned with the edge of the lower end surface of the midsole plate, the upper side of the edge is higher than the upper end surface of the midsole plate and the two form an inner cavity, and the shoe midsole is characterized in that the shoe midsole is made by any shoe midsole production process of the above-mentioned technical scheme, the upper end surface, lower end surface and side surfaces of the shoe midsole are provided with patterns corresponding to those in the mold, and the lower end surface of the shoe midsole is attached with a functional film material bottom.

[0027] The shoe midsole produced by the shoe midsole production process provided by the present application has the following advantages: First, the material of the midsole plate can be selected and selectively made into a dual-density form or other forms. Second, the use of TPU sheet as the midsole plate and edging material of the shoe midsole, and the use of hot melt adhesive as an adhesive, not only reduces material waste, but also reduces the weight of the shoe midsole and improves the wearing comfort of the sole. Third, by reasonably controlling the heating temperature and coordinating the mold pressing process, the stability and uniformity of the internal structure of the shoe midsole are ensured, which not only provides a good shock-absorbing effect, but also effectively disperses the impact force during walking and protects the health of the wearer's feet. Fourth, a functional film material bottom is attached to the lower end surface of the shoe midsole to enhance the wear resistance of the shoe midsole, extend the service life, and improve the anti-slip performance.

[0028] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the process flow of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of a shoe midsole according to a second embodiment of the present invention; Figure 3 Schematic diagram of the hemming of Embodiments 1 and 2 of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1: The production process of the shoe midsole comprises the following steps: Step 1: Cut the thermoplastic elastomer foam sheet into strip-shaped edging 2 and a midsole plate 1 in the shape of the sole of the foot; wherein the thermoplastic elastomer foam sheet includes thermoplastic polyurethane elastomer (TPU) or thermoplastic polyester elastomer (TPEE) or thermoplastic nylon elastomer (PEBA) or TPU thermoplastic elastomer foam sheet. The length of the strip-shaped edging 2 should be less than or equal to the midsole plate 1 in the shape of the sole of the foot, and the strip-shaped edging 2 has a corresponding undulating curvature that conforms to the outer edge appearance of the midsole of the shoe. The edging 2 and the midsole plate 1 can be obtained by cutting thermoplastic elastomer foam sheets of the same or different materials or different densities, and the midsole plate 1 can be obtained by cutting and bonding one or more layers of thermoplastic elastomer foam sheets of the same or different materials or different densities in the same shape.

[0032] Step 2: Fit the edging 2 to the outer periphery of the midsole plate 1 along the outer edge of the midsole plate 1 to form a circle, align the lower edge of the edging 2 with the edge of the lower end surface 11 of the midsole plate 1, and the upper edge of the edging 2 is higher than the upper end surface 12 of the midsole plate 1, and the two form an inner cavity to obtain a first-stage shoe midsole; wherein, the method of bonding the edging 2 to the outer periphery of the midsole plate 1 includes hot air bonding, hot knife bonding, glue bonding, self-adhesive bonding, or hot melt adhesive 3 bonding. When the edge wrapping 2 and the periphery of the midsole plate 1 are bonded with hot melt adhesive 3, the hot melt adhesive 3 needs to be heated to a temperature of the melting point of the hot melt adhesive 3 and lower than the temperature of the thermoplastic elastomer foam sheet, and then the hot melt adhesive 3 is fully infiltrated between the edge wrapping 2 and the midsole plate 1, and the midsole plate 1 and the edge wrapping 2 are kept in a pressed state by mold pressing, manual pressing, or roller pressing, and then the hot melt adhesive 3 is cooled to below the melting point of the hot melt adhesive 3 so that the edge wrapping 2 and the midsole are firmly bonded together; the material of the hot melt adhesive 3 includes EVA hot melt adhesive 3, PA hot melt adhesive 3, PES hot melt adhesive 3, or TPU hot melt adhesive 3, and the melting point of the hot melt adhesive 3 is between 100°C and 160°C.

[0033] Step 3: After cutting the functional film material into the shape of the bottom end surface 11 in the first stage, align it with the bottom end surface 11 of the insole in the first stage and place it into the mold. Close the mold. Then, heat the mold to temperature T1 and maintain for time t1, and then reduce the mold temperature to temperature T2 and maintain for time t2. Take out the insole to obtain the finished insole. Among them, the functional film material includes a rubber shoe outsole coated with hot melt adhesive 3, or a TPU shoe outsole coated with hot melt adhesive 3, or a PU shoe outsole coated with hot melt adhesive 3. The melting point temperature of the coated hot melt adhesive 3 is between 100 - 160 degrees Celsius. Among them, the method of heating inside the mold includes steam heating, hot air heating, hot press heating, electric heating, or heat transfer oil heating. 100°C < T1 < the melting point of the thermoplastic elastomer foamed sheet, 30s < t1 < 3600s, 0°C < T2 < 80°C, 30s < t2 < 3600s. Preferably, 120°C < T1 < 160°C, 60s < t1 < 1200s, 20°C < T2 < 60°C, 60s < t2 < 1200s.

[0034] The insole production process provided by Embodiment 1 has the following advantages: First, by using thermoplastic elastomer foamed sheets such as TPU, TPEE, PEBA, etc., a diverse selection of materials is achieved. These materials have good elasticity and recovery, providing excellent cushioning and support performance for the insole. Second, through precise cutting and fitting processes, material waste is reduced, production costs are lowered, and production efficiency is improved. In addition, the use of the hot melt adhesive 3 fitting technology ensures a firm connection between the edge 2 and the insole board 1, enhancing the structural stability and durability of the insole. Finally, by precisely controlling the heating and cooling processes and using functional film materials, the abrasion resistance, anti-slip performance, and shock absorption effect of the insole are improved, thus producing a high-performance insole that is both lightweight and comfortable.

[0035] Embodiment 2: The insole as shown in Figure 2 , 3 includes an insole board 1 and an edge 2. The edge 2 forms a circumferential fit with the outer periphery of the insole board 1 along the outer edge of the insole board 1. The lower edge of the edge 2 is aligned with the edge of the lower end surface 11 of the insole board 1. The upper edge of the edge 2 is higher than the upper end surface 12 of the insole board 1 and the two form an inner cavity. The feature is that the insole is made by using any one of the above-mentioned insole production processes. The upper end surface 12, lower end surface 11, and side surface of the insole are all provided with patterns corresponding to those inside the mold. The lower end surface 11 of the insole is attached with a functional film material bottom.

[0036] The midsole of the shoe has the following advantages: First, the material of the midsole plate 1 can be selected and selectively made into a dual-density form or other forms. Second, the use of TPU sheet as the material of the midsole plate 1 and the edging 2 of the midsole of the shoe, and the use of hot melt adhesive 3 as an adhesive, not only reduces material waste, but also reduces the weight of the midsole of the shoe, and improves the wearing comfort of the sole. Third, by reasonably controlling the heating temperature and coordinating the mold pressing process, the stability and uniformity of the internal structure of the midsole of the shoe are ensured, which not only provides a good shock-absorbing effect, but also effectively disperses the impact force during walking and protects the health of the wearer's feet. Fourth, a functional film material bottom is attached to the lower end surface 11 of the midsole of the shoe, which enhances the wear resistance of the midsole of the shoe, prolongs the service life, and improves the anti-slip performance.

Claims

1. A production process for a shoe midsole, characterized in that: The following steps are involved: Step 1: Cut the thermoplastic elastomer foam sheet into strip-shaped edging and a midsole sheet with a sole shape; Step 2: Fit the edge of the hem to the outer periphery of the midsole plate along the outer edge of the midsole plate to form a circle, align the lower edge of the hem with the edge of the lower end surface of the midsole plate, and the upper edge of the hem is higher than the upper end surface of the midsole plate and the two form an inner cavity, thereby obtaining a first-stage shoe midsole; Step 3: After cutting the functional film material into the shape of the lower end surface of the first-stage midsole, align it with the lower end surface of the first-stage shoe midsole and put it into the mold, close the mold, and then heat the mold to temperature T1 and keep it for time t1, then reduce the mold temperature to temperature T2 and keep it for time t2. Take out the shoe midsole to obtain the finished shoe midsole.

2. The shoe midsole production process according to claim 1, characterized in that: The thermoplastic elastomer foam sheet in step 1 includes thermoplastic polyurethane elastomer (TPU) or thermoplastic polyester elastomer (TPEE) or thermoplastic nylon elastomer (PEBA) or TPU thermoplastic elastomer foam sheet.

3. The shoe midsole production process according to claim 1, characterized in that: The length of the strip edge in step 1 should be less than or equal to the sole shape of the midsole plate, and the strip edge should have an undulating arc and fit the outer edge appearance of the midsole of the shoe.

4. The shoe midsole production process according to claim 1, characterized in that: As described in step one, the edging and the midsole plate can be obtained by cutting thermoplastic elastomer foam plates of the same or different materials or different densities. As described in step one, the midsole plate can be obtained by cutting and bonding one or more layers of thermoplastic elastomer foam plates of the same or different materials or different densities of the same shape.

5. The shoe midsole production process according to claim 1, characterized in that: As described in step 2, the method of bonding the edge to the periphery of the midsole plate includes hot air bonding, hot knife bonding, glue bonding, self-adhesive bonding, or hot melt adhesive bonding.

6. The shoe midsole production process according to claim 5, characterized in that: When hot melt adhesive is used to bond the edge to the periphery of the midsole plate, the hot melt adhesive needs to be heated to a temperature lower than the melting point of the hot melt adhesive and the temperature of the thermoplastic elastomer foam sheet, and then the hot melt adhesive is fully infiltrated between the edge and the midsole plate. The midsole plate and the edge are kept in a pressed state by mold pressing, manual pressing, or roller pressing, and then the hot melt adhesive is cooled to below the melting point of the hot melt adhesive to firmly bond the edge to the midsole. The material of the hot melt adhesive includes EVA hot melt adhesive, PA hot melt adhesive, PES hot melt adhesive, or TPU hot melt adhesive, and the melting point of the hot melt adhesive is between 100°C and 160°C.

7. The shoe midsole production process according to claim 1, characterized in that: The functional film material described in step three includes a rubber outsole coated with hot melt adhesive, a TPU outsole coated with hot melt adhesive, or a PU outsole coated with hot melt adhesive, and the melting point temperature of the coated hot melt adhesive is between 100-160 degrees.

8. The shoe midsole production process according to claim 1, characterized in that: The method for heating the inside of the mold described in step three includes steam heating, hot air heating, hot pressure heating, electric heating, or heat transfer oil heating.

9. The shoe midsole production process according to claim 1, characterized in that: 100℃ < T1 < melting point of thermoplastic elastomer foam sheet, 30s < t1 < 3600s, 0℃ < T2 < 80℃, 30s < t2 < 3600s.

10. A shoe midsole, comprising a midsole plate and a rim, wherein the rim and the periphery of the midsole plate are in a circle along the outer edge of the midsole plate, the lower edge of the rim is aligned with the edge of the lower end surface of the midsole plate, the upper edge of the rim is higher than the upper end surface of the midsole plate and the two form an inner cavity, characterized in that: The shoe midsole is made by the shoe midsole production process according to any one of claims 1 to 3, the upper end surface, lower end surface and side surface of the shoe midsole are provided with patterns corresponding to those in the mold, and the lower end surface of the shoe midsole is attached with a functional film material bottom.

Images