A lightweight and highly elastic modified EVA midsole and its manufacturing process

Abstract

The present invention discloses a lightweight, highly elastic modified EVA midsole and a manufacturing process thereof, belonging to the technical field of midsoles, comprising a midsole body, wherein a capsule accommodating cavity is provided at the middle position between the heel and the sole of the midsole body, and a pipe arrangement groove is connected between the two capsule accommodating cavities, and rubber cover components are irregularly distributed on the top of the midsole body at the sole and the middle of the foot, and the interior of the two capsule accommodating cavities is equipped with capsule components, and a connecting pipe component for connecting the two capsule components and the rubber cover component is provided inside the pipe arrangement groove, the rubber cover component comprises an inner rubber cover and an outer rubber cover arranged in sequence from the inside to the outside, the capsule component comprises an inner capsule and an outer capsule arranged in sequence from the inside to the outside, and the connecting pipe component comprises an inner connecting pipe and an inner connecting pipe arranged in sequence from the inside to the outside. The present invention removes sweat and odor from the sole of the foot by utilizing the effect of breathing in and out in normal walking and running states, thereby improving the comfort of the foot.

Description

Technical Field

[0001] The present invention relates to the technical field of midsoles, and in particular to a lightweight and highly elastic modified EVA midsole and a manufacturing process thereof. Background Art

[0002] With the development of science and technology, more and more new material technologies with superior performance are being applied in daily life. For example, EVA (ethylene-vinyl acetate copolymer) foam material is widely used in shoe midsoles due to its superior performance.

[0003] However, due to the characteristics of its material, the existing EVA midsole has poor elasticity and is relatively heavy. At the same time, the prior art has an air bag installed inside the midsole, thereby utilizing the inherent characteristics of the air bag to make the midsole have better elasticity and shock-absorbing effects, or connecting multiple air bags through pipes to allow the gas inside the air bags to circulate with each other, thereby improving the elasticity and shock-absorbing effects of the midsole. However, the air bags in the prior art are generally in a closed state, and the gas can only flow inside the bag. In actual use of shoes by people, although the upper has a breathable function, when the feet sweat, the soles are in a covered state, so the ventilation effect of the soles is not good, especially for feet that are prone to sweating and when running, the soles are more likely to sweat. Therefore, the present invention provides a lightweight and highly elastic modified EVA midsole and a manufacturing process thereof. Summary of the invention

[0004] The main purpose of the present invention is to provide a lightweight and highly elastic modified EVA midsole and its manufacturing process, which can remove sweat and odor from the inside of the shoe by utilizing the effect of breathing during normal walking and running, thereby improving the comfort of the feet.

[0005] To achieve the above object, the present invention provides a process for manufacturing a lightweight and highly elastic modified EVA midsole, wherein the EVA midsole comprises the following percentage ratios:

[0006] EVA7470: 50-60 copies;

[0007] Nylon elastomer P-4080: 20-30 parts;

[0008] Thermoplastic elastomer T-BLEND 4002-95T: 10-20 parts;

[0009] Stearic acid: 0.5-1.0 parts;

[0010] Active zinc oxide: 1.0 -1.5 parts;

[0011] Foaming agent: 2.0-3.0 parts;

[0012] Bridging agent: 0.5-1.0 part;

[0013] Fast-ripening agent: 0.8-1.2 parts;

[0014] The manufacturing process comprises the following steps:

[0015] S1. Preheat the internal mixer to 90℃, add EVA7470, nylon elastomer P-4080, thermoplastic elastomer T-BLEND 4002-95T, stearic acid, active zinc oxide, and accelerator in turn, mix for 7-8 minutes until the material is agglomerated, turn the material over once, and clean up the raised drugs and dust, mix for about 2 minutes to ensure that the materials are evenly mixed, add bridging agent and foaming agent, mix for 1 minute, turn the material over once, and clean up the raised drugs, mix for 30 seconds and then pour the material, the material temperature should not exceed 130℃;

[0016] S2, drying the refined material and granulating it through a granulator to obtain composite particles;

[0017] S3, the composite particles are foamed by a foaming machine to obtain foamed composite particles, and the machine pressure of the foaming machine is: 150kg / cm 2 ; Temperature: 165±3℃, time: 480-540sec;

[0018] S4. The foamed composite particles are introduced into the molding machine for molding to obtain the midsole body to be processed. The machine pressure of the molding machine is: 150kg / cm 2 ; Temperature: 165±3℃, hot pressing: 480-540sec; cold pressing: 480-540sec.

[0019] A lightweight and highly elastic modified EVA midsole, comprising a midsole body made by the manufacturing process, wherein the midsole body is provided with a bladder accommodating cavity at the middle position between the heel and the sole, and a pipe arrangement groove is connected between the two bladder accommodating cavities, and the top of the midsole body at the sole and the middle of the foot is irregularly distributed with rubber cover components;

[0020] The two bladder accommodating chambers are both equipped with bladder assemblies, and a connecting pipe assembly for connecting the two bladder assemblies and the rubber cover assembly is arranged inside the pipeline arrangement groove.

[0021] Preferably, the rubber cover assembly comprises an inner rubber cover and an outer rubber cover which are sequentially arranged from the inside to the outside, and air holes are evenly spaced on the top surface of the outer rubber cover.

[0022] Preferably, the bladder assembly comprises an inner bladder and an outer bladder which are sequentially arranged from the inside to the outside, and the upper and lower sides of the inner bladder and the outer bladder are connected by symmetrically arranged figure-eight rubber supports.

[0023] Preferably, the connecting pipe assembly includes an inner connecting pipe and an outer connecting pipe which are arranged in sequence from the inside to the outside, and the two ends of the outer connecting pipe and the inner connecting pipe are respectively connected to the outer sac body and the inner sac body inside the two groups of sac body assemblies, and an outer connecting pipe is connected to the side of the outer connecting pipe for connecting the outer rubber cover and the outer connecting pipe, and an inner connecting pipe is arranged inside the outer connecting pipe for connecting the inner connecting pipe and the inner rubber cover.

[0024] The invention is beneficial in that: firstly, the thermoplastic elastomer T-BLEND 4002-95T is a blend with a polystyrene block copolymer as a base material, has excellent elasticity, flexibility and softness, can be used in a general EVA foaming processing and molding method to produce different unique products, and can improve the resilience, elongation and the like; the supercritical foaming material is a thermoplastic polyamide elastomer, also called a nylon elastomer, which is a linear block copolymer composed of a polyamide elastomer hard segment and a polyether or polyester soft segment; the nylon elastomer P-4080 is a polyetheramide block copolymer, which is characterized by being light and elastic, and the normal specific gravity of the foaming material can be 0.07-0.08, and the vertical rebound is also very excellent, which can reach 73-75%; the supercritical foaming material P-4080 and the thermoplastic elastomer T-BLEND 4002-95T are used to modify EVA to produce a midsole, and the weight is about 30% of that of a common EVA midsole, and the midsole has excellent resilience and good comprehensive performance. Lightweight: Lightweight and reduces fatigue, and the elasticity provides cushioning protection and ample energy return.

[0025] Secondly, in normal walking and running, the center of gravity of a person changes, squeezing the bladder assembly at the heel position or the bladder assembly at the sole position, so that the outer bladder and the inner bladder inside the bladder assembly are squeezed under the action of human weight, thereby introducing the gas inside the inner bladder into the inner rubber cover through the inner connecting pipe and the inner communicating pipe, causing the inner rubber cover to deform so that it can better fit the sole of the foot, thereby improving the comfort of the shoe, and simultaneously, during the squeezing process, the gas inside the outer bladder is introduced into the outer rubber cover through the outer connecting pipe and the outer communicating pipe, and then the gas introduced into the outer rubber cover is discharged through the air vents, thereby blowing air to the sole of the foot, thereby achieving air conditioning of the shoe. While deodorizing the inside, the exhaust gas is used to blow air to the soles of the feet to remove sweat, thereby improving comfort. At the same time, because the inner capsule, the inner connecting pipe and the inner rubber cover are connected, they are in a sealed environment, so that the shock absorption effect of the midsole body can be improved during walking through the inner capsule and the inner rubber cover. In the process of lifting the foot, the rubber support is used to make the outer capsule rebound, so that the outer capsule is reset. In the process of resetting, the outer capsule generates reverse suction, thereby further improving comfort. Therefore, during walking, a breathing effect is generated inside the midsole body, so that under the action of breathing, not only the inside of the shoe can be deodorized, but also the soles of the feet can be desweatened, thereby improving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The accompanying drawings of the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a schematic structural diagram of the lower half of the midsole body of the present invention.

[0029] Figure 3 It is a schematic diagram of the upper structure of the midsole body of the present invention.

[0030] Figure 4 It is a partial structural schematic diagram of the bladder assembly, the connecting pipe assembly and the rubber cover assembly of the present invention.

[0031] In the above figure, 100, midsole body; 101, outer rubber cover; 102, air vent; 103, bladder housing cavity; 104, outer bladder; 105, pipe arrangement groove; 106, external connecting pipe; 107, external connecting pipe; 108, internal connecting pipe; 109, inner rubber cover; 110, inner bladder; 111, rubber support; 112, internal connecting pipe. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "center", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0035] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] Embodiment 1: This embodiment provides a manufacturing process of a lightweight and highly elastic modified EVA midsole, wherein the EVA midsole comprises the following percentage ratios:

[0039] EVA7470: 50-55 copies;

[0040] Nylon elastomer P-4080: 20-25 parts;

[0041] Thermoplastic elastomer T-BLEND 4002-95T: 10-15 parts;

[0042] Stearic acid: 0.5-0.75 parts;

[0043] Active zinc oxide: 1.0 -1.25 parts;

[0044] Foaming agent: 2.0-2.5 parts;

[0045] Bridging agent: 0.5-0.75 parts;

[0046] Fast-ripening agent: 0.8-1 part;

[0047] The manufacturing process comprises the following steps:

[0048] S1. Preheat the internal mixer to 90℃, add EVA7470, nylon elastomer P-4080, thermoplastic elastomer T-BLEND 4002-95T, stearic acid, active zinc oxide, and accelerator in turn, mix for 7-8 minutes until the materials are agglomerated, turn the materials over once, and clean up the raised drugs and dust, mix for about 2 minutes to ensure that the materials are evenly mixed, add bridging agent and foaming agent, mix for 1 minute, turn the materials over once, and clean up the raised drugs, mix for 30 seconds and then pour the materials, the material temperature should not exceed 130℃;

[0049] S2, drying the refined material and granulating it through a granulator to obtain composite particles;

[0050] S3, the composite particles are foamed by a foaming machine to obtain foamed composite particles, and the machine pressure of the foaming machine is: 150kg / cm 2 ; Temperature: 165±3℃, time: 480-540sec;

[0051] S4, the foamed composite particles are introduced into a molding machine for molding to obtain the midsole body 100 to be processed, and the machine pressure of the molding machine is: 150kg / cm 2; Temperature: 165±3℃, hot pressing: 480-540sec; cold pressing: 480-540sec.

[0052] Embodiment 2: This embodiment provides a manufacturing process of a lightweight and highly elastic modified EVA midsole, wherein the EVA midsole comprises the following percentage ratios:

[0053] EVA7470: 56-60 copies;

[0054] Nylon elastomer P-4080: 26-30 parts;

[0055] Thermoplastic elastomer T-BLEND 4002-95T: 16-20 parts;

[0056] Stearic acid: 0.76-1.0 parts;

[0057] Active zinc oxide: 1.26 -1.5 parts;

[0058] Foaming agent: 2.6-3.0 parts;

[0059] Bridging agent: 0.76-1.0 parts;

[0060] Fast-ripening agent: 1.1-1.2 parts;

[0061] The manufacturing process comprises the following steps:

[0062] S1. Preheat the internal mixer to 90℃, add EVA7470, nylon elastomer P-4080, thermoplastic elastomer T-BLEND 4002-95T, stearic acid, active zinc oxide, and accelerator in turn, mix for 7-8 minutes until the materials are agglomerated, turn the materials over once, and clean up the raised drugs and dust, mix for about 2 minutes to ensure that the materials are evenly mixed, add bridging agent and foaming agent, mix for 1 minute, turn the materials over once, and clean up the raised drugs, mix for 30 seconds and then pour the materials, the material temperature should not exceed 130℃;

[0063] S2, drying the refined material and granulating it through a granulator to obtain composite particles;

[0064] S3, the composite particles are foamed by a foaming machine to obtain foamed composite particles, and the machine pressure of the foaming machine is: 150kg / cm 2 ; Temperature: 165±3℃, time: 480-540sec;

[0065] S4, the foamed composite particles are introduced into a molding machine for molding to obtain the midsole body 100 to be processed, and the machine pressure of the molding machine is: 150kg / cm 2; Temperature: 165±3℃, hot pressing: 480-540sec; cold pressing: 480-540sec.

[0066] In summary:

[0067] In the present invention, the thermoplastic elastomer T-BLEND4002-95T is a blend with a polystyrene block copolymer as a base material, has excellent elasticity, flexibility and softness, can be used in a general EVA foaming processing method to produce different unique products, and can improve the resilience, elongation, etc.; the supercritical foaming material is a thermoplastic polyamide elastomer, also called a nylon elastomer, which is a linear block copolymer composed of a polyamide elastomer hard segment and a polyether or polyester soft segment. The nylon elastomer P-4080 is a polyetheramide block copolymer, which is characterized by being light and elastic. The normal specific gravity of the foaming material can be 0.07-0.08, and the vertical rebound is also very excellent, which can reach 73-75%; the supercritical foaming material P-4080 and the thermoplastic elastomer T-BLEND 4002-95T are used to modify EVA to make a midsole, and the weight is about 30% of the ordinary EVA midsole, with excellent rebound performance and good comprehensive performance. Lightweight and lightweight, it reduces fatigue while its resilience provides cushioning protection and energy return.

[0068] The dosage of the nylon elastomer P-4080 is verified in different embodiments, and the test results of its contribution to elasticity at different dosages are shown in the following table:

[0069] Dosage 5PER 10PER 15PER 20PER Vertical rebound (%) GB / T6670-2008 46 50 54 58

[0070] The above thermoplastic elastomer T-BLEND4002-95T has been verified in different embodiments, and its contribution to specific gravity is

[0071] The test results are shown in the following table:

[0072] Dosage 5PER 10PER 15PER 20PER Specific gravity HG / T2872-2009 0.196 0.165 0.142 0.122

[0073] The lightweight and highly elastic modified EVA midsole in the above embodiment has been tested and its physical property test results are as follows:

[0074]

[0075] Example 3: See Figure 1-Figure 4 As shown, this embodiment provides a lightweight and highly elastic modified EVA midsole, including a midsole body 100 made by the manufacturing process, wherein the midsole body 100 is provided with a bladder accommodating cavity 103 at the middle position between the heel and the sole, and a pipe arrangement groove 105 is connected between the two bladder accommodating cavities 103, and the top of the midsole body 100 at the sole and the middle of the foot is irregularly distributed with rubber cover components;

[0076] The two bladder accommodating chambers 103 are both equipped with bladder assemblies, and a connecting pipe assembly for connecting the two bladder assemblies and the rubber cover assembly is arranged inside the pipe arrangement groove 105.

[0077] like Figure 4 As shown, in this embodiment, the rubber cover assembly includes an inner rubber cover 109 and an outer rubber cover 101 which are arranged in sequence from the inside to the outside, and air holes 102 are opened at equal intervals on the top surface of the outer rubber cover 101. On the one hand, the air holes 102 are used to discharge the gas introduced into the inner part of the outer rubber cover 101, so as to blow air to the sole of the foot, thereby deodorizing the inside of the shoe and using the exhaust gas to blow and remove sweat from the sole of the foot to improve comfort. On the other hand, the gas is introduced into the inner rubber cover 109 through the internal connecting pipe 112 and the internal connecting pipe 108, so that the inner rubber cover 109 is deformed, so that it can better fit the sole of the foot, thereby improving the comfort of the sole of the foot.

[0078] like Figure 4 As shown, in this embodiment, the bladder assembly includes an inner bladder 110 and an outer bladder 104 which are arranged in sequence from the inside to the outside, and the upper and lower sides of the inner bladder 110 and the outer bladder 104 are connected by symmetrically arranged figure-eight rubber supports 111. The outer bladder 104 and the inner bladder 110 inside the bladder assembly are squeezed under the action of human body gravity, and the gas inside the outer bladder 104 and the inner bladder 110 is discharged through the outer connecting pipe 106 and the inner connecting pipe 112 respectively. At the same time, during the process of lifting the foot, the figure-eight rubber support 111 is used to restore and expand the outer bladder 104, so that a person can produce a breathing effect during exercise.

[0079] like Figure 4 As shown, in this embodiment, the connecting pipe assembly includes an inner connecting pipe 112 and an outer connecting pipe 106 which are arranged in sequence from the inside to the outside, and the two ends of the outer connecting pipe 106 and the inner connecting pipe 112 are respectively connected to the outer capsule 104 and the inner capsule 110 inside the two groups of capsule assemblies, and an outer connecting pipe 107 which connects the outer rubber cover 101 and the outer connecting pipe 106 is connected to the side of the outer connecting pipe 106, and an inner connecting pipe 108 which connects the inner connecting pipe 112 and the inner rubber cover 109 is arranged inside the outer connecting pipe 107. On the one hand, the inner rubber cover 109 is introduced into the inner rubber cover 109 through the inner connecting pipe 112 and the inner connecting pipe 108, so that the inner rubber cover 109 is deformed so that it can better fit with the sole of the foot, thereby improving the comfort of the shoe. On the other hand, the outer rubber cover 101 is introduced into the inner rubber cover 101 through the outer connecting pipe 106 and the outer connecting pipe 107.

[0080] In summary:

[0081] During the use of the midsole body 100, in the normal walking and standing state, the center of gravity of the person is at the heel position. At the same time, in the normal walking state, along with the lifting of the foot, the bladder assembly inside the bladder accommodating cavity 103 at the heel position is squeezed. In this process, the outer bladder 104 and the inner bladder 110 inside the bladder assembly at the heel position are squeezed under the action of human body gravity, so that the gas inside the inner bladder 110 is introduced into the inner rubber cover 109 through the inner connecting pipe 112 and the inner communicating pipe 108, so that the inner rubber cover 109 is deformed so as to better fit with the sole of the foot, thereby improving the comfort of the sole of the foot, and simultaneously, during the squeezing process of the outer bladder 104, the gas inside the outer bladder 104 is introduced into the outer rubber cover 101 through the outer connecting pipe 106 and the outer communicating pipe 107, and then the gas introduced into the outer rubber cover 101 is discharged through the air vent 102, thereby venting the sole of the foot. Blowing can achieve deodorization of the inside of the shoe and use the exhaust gas to blow air to the sole of the foot to remove sweat, thereby improving comfort. At the same time, it is explained that generally speaking, the insole inside the shoe has a breathable performance, so the gas can pass through the insole to blow air to the sole of the foot. At the same time, because the inner capsule 110, the inner connecting pipe 112 and the inner rubber cover 109 are connected, they are in a sealed environment, so that the shock absorption effect of the midsole body 100 can be improved during walking through the inner capsule 110 and the inner rubber cover 109. In the process of lifting the foot, the rubber support member 111 is used to make the outer capsule 104 rebound, so that the outer capsule 104 is reset. In the process of resetting, the outer capsule 104 generates a reverse suction force, thereby further improving comfort. Therefore, in the process of walking, a breathing effect is generated inside the midsole body 100, so that under the effect of breathing, not only the inside of the shoe can be deodorized, but also the sole of the foot can be desweaten, thereby improving comfort.

[0082] When running, the center of gravity of the human body will act on the forefoot position, so the bladder assembly inside the bladder accommodating cavity 103 at the forefoot position is squeezed, thereby achieving the above-mentioned breathing effect. At the same time, it is explained that due to the running state, the feet are prone to sweating and the temperature inside the shoes will increase accordingly. Therefore, the breathing effect is utilized to greatly reduce the stuffiness at the sole of the foot during running, thereby improving the comfort of the foot during running.

Claims

1. A lightweight and highly elastic modified EVA midsole, characterized in that: It comprises a midsole body (100) manufactured by a manufacturing process, wherein the midsole body (100) is provided with a bladder accommodating cavity (103) at the middle position between the heel and the sole, and a pipe arrangement groove (105) is connected between the two bladder accommodating cavities (103), and the top of the midsole body (100) at the sole and the midfoot position is irregularly distributed with rubber cover components; The two bladder accommodating chambers (103) are each equipped with a bladder assembly, and a connecting pipe assembly for connecting the two bladder assemblies and the rubber cover assembly is provided inside the pipe arrangement groove (105); The rubber cover assembly comprises an inner rubber cover (109) and an outer rubber cover (101) which are arranged in sequence from the inside to the outside, and air holes (102) are provided at equal intervals on the top surface of the outer rubber cover (101); The bladder assembly comprises an inner bladder (110) and an outer bladder (104) which are arranged in sequence from the inside to the outside, and the upper and lower sides of the inner bladder (110) and the outer bladder (104) are connected via symmetrically arranged figure-eight rubber support members (111); The connecting pipe assembly comprises an inner connecting pipe (112) and an outer connecting pipe (106) which are arranged in sequence from the inside to the outside, and the two ends of the outer connecting pipe (106) and the inner connecting pipe (112) are respectively connected to the outer sac (104) and the inner sac (110) inside the two groups of sac assemblies, and an outer connecting pipe (107) is connected to the side of the outer connecting pipe (106) so as to connect the outer rubber cover (101) and the outer connecting pipe (106), and an inner connecting pipe (108) is arranged inside the outer connecting pipe (107) so as to connect the inner connecting pipe (112) and the inner rubber cover (109); The EVA midsole includes the following percentage ratios: EVA7470: 50-60 copies; Nylon elastomer P-4080: 20-30 parts; Thermoplastic elastomer T-BLEND 4002-95T: 10-20 parts; Stearic acid: 0.5-1.0 parts; Active zinc oxide: 1.0-1.5 parts; Foaming agent: 2.0-3.0 parts; Bridging agent: 0.5-1.0 part; Fast-ripening agent: 0.8-1.2 parts; The manufacturing process comprises the following steps: S1. Preheat the internal mixer to 90℃, add EVA7470, nylon elastomer P-4080, thermoplastic elastomer T-BLEND 4002-95T, stearic acid, active zinc oxide, and accelerator in turn, mix for 7-8 minutes until the materials are agglomerated, turn the materials over once, and clean up the raised drugs and dust, mix for about 2 minutes to ensure that the materials are evenly mixed, add bridging agent and foaming agent, mix for 1 minute, turn the materials over once, and clean up the raised drugs, mix for 30 seconds and then pour the materials, the material temperature should not exceed 130℃; S2, drying the refined material and granulating it through a granulator to obtain composite particles; S3, the composite particles are foamed by a foaming machine to obtain foamed composite particles, and the machine pressure of the foaming machine is: 150kg / cm 2 ; Temperature: 165±3℃, time: 480-540sec; S4, introducing the foamed composite particles into a molding machine for molding to obtain a midsole body (100) to be processed, and the machine pressure of the molding machine is: 150kg / cm 2 ; Temperature: 165±3℃, hot pressing: 480-540sec; cold pressing: 480-540sec.

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