Midsole and outsole integrated hot press molding method and sole

Abstract

The invention relates to an insole and outsole integrated hot press molding method which comprises the following steps: taking an outsole plate subjected to foaming molding, cutting outsoles with different shapes by using an outsole cutting mold according to requirements, and perforating the cut outsoles, so that air holes penetrating through the upper and lower surfaces of the outsoles are uniformly distributed in the obtained outsoles; taking a foam-molded insole which is free of perforation, and cleaning the surface of the insole; putting the cut and formed outsole into a pressing mold, then putting the insole into the pressing mold, enabling the surface of the insole to be attached to the inner side face of the outsole, covering the pressing mold, transferring the pressing mold to a workbench of a pressing machine, pressurizing, pressing and heating to carry out secondary hot press forming treatment, and cooling to obtain the shoe sole. According to the sole manufactured through the method, the reject ratio is obviously reduced, the productivity is obviously improved, and gas between the insole and the outsole can be effectively exhausted in the thermocompression bonding process through the gas holes penetrating through the upper surface and the lower surface of the outsole in the manufacturing process.

Description

Technical Field

[0001] The invention relates to the technical field of shoe material processing, and in particular to a method for integrally hot-pressing a midsole and an outsole and a shoe sole. Background Art

[0002] In recent years, foamed sports shoe soles are widely liked by people because of their light weight and comfortable wearing. EVA sole refers to the sole made of ethylene-vinyl acetate copolymer (EVA) material, and the resilience and tensile strength of this EVA sole are high, and the toughness is good, and it has good impact resistance and shock absorption performance, and can adapt to various climates and environments. Therefore, the application of EVA material in the midsole of sports shoes is extremely common. However, the skid resistance and yellowing resistance of existing EVA sole materials are relatively poor, so it is necessary to set a layer of rubber outsole at the bottom, and the existing outsole mostly adopts rubber material, and in order to make the two better merge together when the midsole and outsole are hot pressed, most of them are vented in the midsole during the foaming process of the midsole, so that the gas between the midsole and the outsole is discharged during the hot pressing process, but when there is a foamed midsole, the vent cannot be opened at the position corresponding to the bottom outsole, resulting in the problem of too high defective rate in the midsole and outsole hot pressing process. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies existing in the prior art, the purpose of the present invention is to provide a method for hot pressing a midsole and an outsole as a whole. The defective rate of the soles made by the above method is significantly reduced, and the production capacity is significantly improved. During the preparation process, the air holes penetrating the upper and lower surfaces of the outsole can effectively discharge the gas between the midsole and the outsole during the hot pressing process; at the same time, because the air holes are set in the outsole, there is no need to set exhaust holes in the midsole, which can well avoid the problems existing in the prior art.

[0004] The object of the present invention is to provide a shoe sole without air holes, which has good shock absorption performance, anti-skid effect, weather resistance and other properties, and also has the characteristics of wear resistance, high rebound, tensile resistance and light weight.

[0005] The purpose of the present invention is achieved by the following technical solution: A method for integrally hot pressing a midsole and an outsole comprises the following steps: S1. Take a foamed sole sheet, cut out soles of different shapes using a sole cutting mold according to needs, and perform perforation treatment on the cut soles so that the obtained soles have evenly distributed pores penetrating the upper and lower surfaces thereof for standby use; S2, take the foamed midsole, which has no perforations, clean the surface of the midsole, and set it aside; S3, putting the cut outsole into a pressing mold, then putting the midsole into the pressing mold and making the surface of the midsole fit the inner side of the outsole, covering the pressing mold, transferring the pressing mold to the working table of the pressing machine, pressurizing and heating for secondary hot pressing, and after cooling, obtaining the sole.

[0006] The defective rate of the soles prepared by the above method in the present invention is significantly reduced, and the production capacity is significantly improved. During the preparation process, the air holes penetrating the upper and lower surfaces of the outsole can be used to effectively discharge the gas between the midsole and the outsole during the hot pressing process; at the same time, because the air holes are set in the outsole, there is no need to set exhaust holes in the midsole, which can well avoid the problems existing in the prior art.

[0007] Preferably, the large bottom plate material is one or more of EVA foam material, TPU foam material, Peba foam material, TPE foam material, OBCS foam material, EPDM foam material, SBS foam material, and POE foam material.

[0008] Preferably, the EVA foam material comprises the following raw materials in parts by weight: 40-60 parts of EVA copolymer, 10-20 parts of POE, 5-10 parts of rosin resin, 1-5 parts of foaming agent, 1-3 parts of cross-linking agent, 1-5 parts of activator, 4-8 parts of filler, 3-7 parts of graphene, 1-3 parts of chain extender, and 5-10 parts of anti-slip agent.

[0009] The outsole of the shoe sole of the present invention is made of the above raw materials, and the outsole made of the above raw materials has good shock absorption performance, anti-skid effect, weather resistance and other properties, and also has the characteristics of wear resistance, high rebound, tensile resistance and light weight. EVA copolymer is one of the main components of the outsole, has good elasticity and shock absorption performance, and the EVA copolymers with different vinyl acetate contents are used in combination to adjust the softness and elasticity of the outsole, so that the outsole can effectively absorb the impact force generated during exercise and reduce damage to the feet and joints; in addition, rosin resin, talcum powder, POE, etc. are added to the EVA copolymer, and the unsaturation degree of the EVA copolymer is low, and a cross-linking agent is required for vulcanization cross-linking, so that the prepared foamed outsole has excellent wear resistance, high elasticity and impact resistance. The addition of graphene can enhance the electrical conductivity and thermal conductivity of the sole, the electrical conductivity can prevent static electricity accumulation, and the thermal conductivity helps to dissipate the heat generated by the feet in time during exercise, thereby improving the comfort of wearing.

[0010] Preferably, the EVA copolymer comprises EVA copolymer 1 and EVA copolymer 2 in a weight ratio of 0.8-1.2:1, wherein the content of vinyl acetate in EVA copolymer 1 is 50-80%, and the content of vinyl acetate in EVA copolymer 2 is 10-20%. Preferably, the foaming agent is one or more of azodicarbonamide, sodium carbonate, sodium bicarbonate, and zinc oxide.

[0011] Preferably, the cross-linking agent is one or more of dicumyl peroxide and 1,4-di-tert-butyl peroxycumene.

[0012] The foaming agent added to the outsole board material of the present invention can make the EVA copolymer foam to form a sole material with a porous structure, which can not only further reduce the weight of the sole but also enhance the cushioning performance of the sole; and the cross-linking agent can form a cross-linked structure between the EVA molecular chains, improve the strength and elasticity of the foamed material, and stabilize its foaming structure.

[0013] Preferably, the activator is composed of zinc oxide and zinc stearate in a mass ratio of 1-3:0.8-1.2.

[0014] Preferably, the filler is one or more of white carbon black, titanium dioxide, talcum powder, modified white corundum, white rubber powder and mica.

[0015] More preferably, the modified white corundum is prepared by the following method: adding pre-dried white corundum to a 1-3% by mass solution of hexadecyltrimethylammonium bromide, stirring the mixture at room temperature, and washing and drying the mixture to obtain the modified white corundum material.

[0016] The filler (such as white carbon black, titanium dioxide, talcum powder, modified white corundum, etc.) added to the outsole plate material of the present invention can increase the hardness and wear resistance of the outsole, which helps to increase the service life of the outsole. At the same time, the addition of the filler can also enhance the structural stability of the outsole and prevent the outsole from excessive deformation during exercise.

[0017] Preferably, the chain extender is one or more of ethylene glycol, propylene glycol, neopentyl glycol, and methylpropylene glycol.

[0018] Preferably, the anti-slip agent is composed of dioctyl ester, white smoke and PVC in a mass ratio of 0.8-1.2:0.6-1.0:0.4-0.8.

[0019] The anti-skid agent added to the large sole plate of the present invention is composed of dioctyl grease, white smoke and PVC, which can increase the friction between the sole and the ground, so that the sports shoes have good anti-skid performance under various ground conditions (such as wet and smooth ground), thereby improving sports safety.

[0020] In the present invention, the foaming agent decomposes at a certain temperature to generate gas (such as azodicarbonamide decomposes under heat to generate nitrogen, etc.), and these gases form bubble nuclei in the EVA copolymer matrix. As the foaming process proceeds, the bubbles continue to grow, causing the EVA material to foam; in this process, the crosslinking agent causes a crosslinking reaction between the EVA molecular chains to form a three-dimensional network structure, which limits the excessive expansion of the bubbles, thereby forming a stable foaming structure; the zinc oxide and zinc stearate in the activator can synergize with the crosslinker, the zinc oxide can promote the decomposition of the crosslinker, accelerate the crosslinking reaction, and the zinc stearate can play the role of an activator and a lubricant. , improve the processing performance of the material, and make the raw materials mix and react better; there is physical adsorption and chemical bonding between the filler and the EVA copolymer, and the surface of the filler can adsorb the EVA molecular chain, enhancing the bonding force between the filler and the matrix, thereby improving the overall performance of the outsole material; for the modified white corundum, it is modified by hexadecyltrimethylammonium bromide solution so that its surface has organic functional groups, which is more conducive to bonding with the EVA matrix; the chain extender can react with the functional groups at the end of the EVA molecular chain to increase the length of the molecular chain, and further improve the molecular weight and performance of the material, such as improving the toughness and strength of the material.

[0021] Preferably, the EVA foam material is prepared by the following method: A1. Add EVA copolymer, POE, foaming agent, crosslinking agent, activator and filler to a reactor in order according to weight parts, and plasticize at 80-100° C. for 30-60 min to obtain component A for standby use; A2, according to weight parts, add rosin resin, graphene, chain extender, anti-slip agent to the reaction kettle in sequence, mix at 100-150 ° C for 20-40 min, cool down, and obtain component B for standby use; A3. Component A and component B are mixed evenly in proportion to obtain an EVA foam material, the material is put into a calender to be calendered into a sheet, the sheet is cut according to the requirements of the mold, and the mold is sent to a foaming machine for foaming treatment to obtain an EVA foam material.

[0022] The present invention also provides a sole without pores, which is made by the method of hot pressing the midsole and the outsole as one body, the sole includes the outsole and the midsole, the outsole is provided with pores running through its upper and lower surfaces, the pores are evenly distributed on the outsole body, the outsole is arranged at the bottom of the midsole, and the outsole and the midsole are pressed and formed as one body.

[0023] The beneficial effects of the present invention are as follows: the defective rate of the soles prepared by the above method of the present invention is significantly reduced, the production capacity is significantly improved, and the air holes penetrating the upper and lower surfaces of the outsole are used in the preparation process to effectively discharge the gas between the midsole and the outsole during the hot pressing process; at the same time, because the air holes are set in the outsole and there is no need to set exhaust holes in the midsole, the problems existing in the prior art can be well avoided.

[0024] The pore-free sole of the present invention has good shock absorption performance, anti-skid effect, weather resistance and other properties, and also has the characteristics of wear resistance, high rebound, tensile resistance and light weight. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0027] Example 1

[0028] A method for integrally hot-pressing a midsole and an outsole, comprising the following steps: S1. Take a foamed sole sheet, cut out soles of different shapes using a sole cutting mold according to needs, and perform perforation treatment on the cut soles so that the obtained soles have evenly distributed pores penetrating the upper and lower surfaces thereof for standby use; S2, take the foamed midsole, which has no perforations, clean the surface of the midsole, and set it aside; S3, putting the cut outsole into a pressing mold, then putting the midsole into the pressing mold and making the surface of the midsole fit the inner side of the outsole, covering the pressing mold, transferring the pressing mold to the working table of the pressing machine, pressurizing and heating for secondary hot pressing, and after cooling, obtaining the sole.

[0029] The large bottom plate material is an EVA foam material, which includes the following raw materials in parts by weight: 40 parts of EVA copolymer, 10 parts of POE, 5 parts of rosin resin, 1 part of foaming agent, 1 part of cross-linking agent, 1 part of activator, 4 parts of filler, 3 parts of graphene, 1 part of chain extender, and 5 parts of anti-slip agent; wherein the POE adopts polyolefin elastomer from Dow Chemical.

[0030] The EVA copolymer comprises an EVA copolymer 1 and an EVA copolymer 2 in a weight ratio of 0.8:1, wherein the content of vinyl acetate in the EVA copolymer 1 is 50-80%, and the content of vinyl acetate in the EVA copolymer 2 is 10-20%. The foaming agent is azodicarbonamide. The cross-linking agent is dicumyl peroxide.

[0031] The activator is composed of zinc oxide and zinc stearate in a mass ratio of 1:0.8.

[0032] The filler is composed of white carbon black, titanium dioxide and modified white corundum in a mass ratio of 0.8:0.6:1.0.

[0033] The modified white corundum is prepared by the following method: adding pre-dried white corundum into a 1% by mass hexadecyltrimethylammonium bromide solution, stirring and reacting at room temperature, and washing and drying to obtain the modified white corundum material.

[0034] The chain extender is ethylene glycol.

[0035] The anti-slip agent is composed of dioctyl ester, white smoke and PVC in a mass ratio of 0.8:0.6:0.4.

[0036] The EVA foam material is prepared by the following method: A1. Add EVA copolymer, POE, foaming agent, crosslinking agent, activator and filler to a reactor in order according to parts by weight, and plasticize at 80° C. for 60 min to obtain component A for standby use; A2. According to parts by weight, rosin resin, graphene, chain extender and anti-slip agent were added to the reaction kettle in sequence, mixed at 100° C. for 40 min, cooled to obtain component B, which was set aside; A3. Component A and component B are mixed evenly in proportion to obtain an EVA foam material, the material is put into a calender to be calendered into a sheet, the sheet is cut according to the requirements of the mold, and the mold is sent to a foaming machine for foaming treatment to obtain an EVA foam material.

[0037] A shoe sole without pores, the shoe sole is made by a method of integrally hot-pressing the midsole and the outsole, the shoe sole comprises an outsole and a midsole, the outsole is provided with pores penetrating the upper and lower surfaces thereof, the pores are evenly distributed on the outsole body, the outsole is arranged at the bottom of the midsole, and the outsole and the midsole are integrally pressed and formed.

[0038] Example 2

[0039] A method for integrally hot-pressing a midsole and an outsole, comprising the following steps: S1. Take a foamed sole sheet, cut out soles of different shapes using a sole cutting mold according to needs, and perform perforation treatment on the cut soles so that the obtained soles have evenly distributed pores penetrating the upper and lower surfaces thereof for standby use; S2, take the foamed midsole, which has no perforations, clean the surface of the midsole, and set it aside; S3, putting the cut outsole into a pressing mold, then putting the midsole into the pressing mold and making the surface of the midsole fit the inner side of the outsole, covering the pressing mold, transferring the pressing mold to the working table of the pressing machine, pressurizing and heating for secondary hot pressing, and after cooling, obtaining the sole.

[0040] The large bottom plate material is an EVA foam material, which includes the following raw materials in parts by weight: 50 parts of EVA copolymer, 15 parts of POE, 8 parts of rosin resin, 3 parts of foaming agent, 2 parts of cross-linking agent, 3 parts of activator, 6 parts of filler, 5 parts of graphene, 2 parts of chain extender, and 8 parts of anti-slip agent; wherein the POE adopts polyolefin elastomer from Dow Chemical.

[0041] The EVA copolymer comprises an EVA copolymer 1 and an EVA copolymer 2 in a weight ratio of 1.0:1, wherein the content of vinyl acetate in the EVA copolymer 1 is 50-80%, and the content of vinyl acetate in the EVA copolymer 2 is 10-20%. The foaming agent is composed of azodicarbonamide, sodium carbonate and sodium bicarbonate in a mass ratio of 1.0:0.8:1.1.

[0042] The cross-linking agent is 1,4-di-tert-butylperoxyisopropylbenzene.

[0043] The activator is composed of zinc oxide and zinc stearate in a mass ratio of 2:1.0.

[0044] The filler is composed of white carbon black, titanium dioxide and modified white corundum in a mass ratio of 1.0:0.8:1.1.

[0045] The modified white corundum is prepared by the following method: adding pre-dried white corundum into a 2% by mass hexadecyltrimethylammonium bromide solution, stirring and reacting at room temperature, and washing and drying to obtain the modified white corundum material.

[0046] The chain extender is neopentyl glycol.

[0047] The anti-slip agent is composed of dioctyl ester, white smoke and PVC in a mass ratio of 1.0:0.8:0.6.

[0048] The EVA foam material is prepared by the following method: A1. Add EVA copolymer, POE, foaming agent, crosslinking agent, activator and filler to a reactor in order according to weight parts, and plasticize at 90° C. for 45 min to obtain component A for standby use; A2, according to weight parts, rosin resin, graphene, chain extender, anti-slip agent were added to the reaction kettle in sequence, mixed at 130 ° C for 30 min, cooled to obtain component B, and set aside; A3. Component A and component B are mixed evenly in proportion to obtain an EVA foam material, the material is put into a calender to be calendered into a sheet, the sheet is cut according to the requirements of the mold, and the mold is sent to a foaming machine for foaming treatment to obtain an EVA foam material.

[0049] A shoe sole without pores, the shoe sole is made by a method of integrally hot-pressing the midsole and the outsole, the shoe sole comprises an outsole and a midsole, the outsole is provided with pores penetrating the upper and lower surfaces thereof, the pores are evenly distributed on the outsole body, the outsole is arranged at the bottom of the midsole, and the outsole and the midsole are integrally pressed and formed.

[0050] Example 3

[0051] A method for integrally hot-pressing a midsole and an outsole, comprising the following steps: S1. Take a foamed sole sheet, cut out soles of different shapes using a sole cutting mold according to needs, and perform perforation treatment on the cut soles so that the obtained soles have evenly distributed pores penetrating the upper and lower surfaces thereof for standby use; S2, take the foamed midsole, which has no perforations, clean the surface of the midsole, and set it aside; S3, putting the cut outsole into a pressing mold, then putting the midsole into the pressing mold and making the surface of the midsole fit the inner side of the outsole, covering the pressing mold, transferring the pressing mold to the working table of the pressing machine, pressurizing and heating for secondary hot pressing, and after cooling, obtaining the sole.

[0052] The large bottom plate material is an EVA foam material, which includes the following raw materials in parts by weight: 60 parts of EVA copolymer, 20 parts of POE, 10 parts of rosin resin, 5 parts of foaming agent, 3 parts of cross-linking agent, 5 parts of activator, 8 parts of filler, 7 parts of graphene, 3 parts of chain extender, and 10 parts of anti-slip agent; wherein the POE adopts polyolefin elastomer from Dow Chemical.

[0053] The EVA copolymer comprises an EVA copolymer 1 and an EVA copolymer 2 in a weight ratio of 1.2:1, wherein the content of vinyl acetate in the EVA copolymer 1 is 50-80%, and the content of vinyl acetate in the EVA copolymer 2 is 10-20%. The foaming agent is sodium bicarbonate. The cross-linking agent is dicumyl peroxide.

[0054] The activator is composed of zinc oxide and zinc stearate in a mass ratio of 3:1.2.

[0055] The filler is composed of white carbon black, titanium dioxide and modified white corundum in a mass ratio of 1.2:1.0:1.2.

[0056] The modified white corundum is prepared by the following method: adding pre-dried white corundum into a 3% by mass hexadecyltrimethylammonium bromide solution, stirring and reacting at room temperature, and washing and drying to obtain the modified white corundum material.

[0057] The chain extender is methyl propylene glycol.

[0058] The anti-slip agent is composed of dioctyl ester, white smoke and PVC in a mass ratio of 1.2:1.0:0.4.

[0059] The EVA foam material is prepared by the following method: A1. Add EVA copolymer, POE, foaming agent, crosslinking agent, activator and filler to a reactor in order according to weight parts, and plasticize at 100° C. for 30 min to obtain component A for standby use; A2. According to parts by weight, rosin resin, graphene, chain extender and anti-slip agent were added to the reaction kettle in sequence, mixed at 100° C. for 40 min, cooled to obtain component B, which was set aside; A3. Component A and component B are mixed evenly in proportion to obtain an EVA foam material, the material is put into a calender to be calendered into a sheet, the sheet is cut according to the requirements of the mold, and the mold is sent to a foaming machine for foaming treatment to obtain an EVA foam material.

[0060] A shoe sole without pores, the shoe sole is made by a method of integrally hot-pressing the midsole and the outsole, the shoe sole comprises an outsole and a midsole, the outsole is provided with pores penetrating the upper and lower surfaces thereof, the pores are evenly distributed on the outsole body, the outsole is arranged at the bottom of the midsole, and the outsole and the midsole are integrally pressed and formed.

[0061] Example 4

[0062] A method for integrally hot-pressing a midsole and an outsole, comprising the following steps: S1. Take a foamed sole sheet, cut out soles of different shapes using a sole cutting mold according to needs, and perform perforation treatment on the cut soles so that the obtained soles have evenly distributed pores penetrating the upper and lower surfaces thereof for standby use; S2, take the foamed midsole, which has no perforations, clean the surface of the midsole, and set it aside; S3, putting the cut outsole into a pressing mold, then putting the midsole into the pressing mold and making the surface of the midsole fit the inner side of the outsole, covering the pressing mold, transferring the pressing mold to the working table of the pressing machine, pressurizing and heating for secondary hot pressing, and after cooling, obtaining the sole.

[0063] The large bottom plate material is an EVA foam material, which includes the following raw materials in parts by weight: 60 parts of EVA copolymer, 20 parts of POE, 10 parts of rosin resin, 5 parts of foaming agent, 3 parts of cross-linking agent, 5 parts of activator, 8 parts of filler, 7 parts of graphene, 3 parts of chain extender, and 10 parts of anti-slip agent; wherein the POE adopts polyolefin elastomer from Dow Chemical.

[0064] The EVA copolymer comprises an EVA copolymer 1 and an EVA copolymer 2 in a weight ratio of 1.0:1, wherein the content of vinyl acetate in the EVA copolymer 1 is 50-80%, and the content of vinyl acetate in the EVA copolymer 2 is 10-20%. The foaming agent is composed of azodicarbonamide, sodium carbonate and sodium bicarbonate in a mass ratio of 1.0:0.8:1.1.

[0065] The cross-linking agent is 1,4-di-tert-butylperoxyisopropylbenzene.

[0066] The activator is composed of zinc oxide and zinc stearate in a mass ratio of 2:1.0.

[0067] The filler is composed of white carbon black, titanium dioxide and modified white corundum in a mass ratio of 1.0:0.8:1.1.

[0068] The modified white corundum is prepared by the following method: adding pre-dried white corundum into a 2% by mass hexadecyltrimethylammonium bromide solution, stirring and reacting at room temperature, and washing and drying to obtain the modified white corundum material.

[0069] The chain extender is neopentyl glycol.

[0070] The anti-slip agent is composed of dioctyl ester, white smoke and PVC in a mass ratio of 1.0:0.8:0.6.

[0071] The EVA foam material is prepared by the following method: A1. Add EVA copolymer, POE, foaming agent, crosslinking agent, activator and filler to a reactor in order according to weight parts, and plasticize at 90° C. for 45 min to obtain component A for standby use; A2, according to weight parts, rosin resin, graphene, chain extender, anti-slip agent were added to the reaction kettle in sequence, mixed at 130 ° C for 30 min, cooled to obtain component B, and set aside; A3. Component A and component B are mixed evenly in proportion to obtain an EVA foam material, the material is put into a calender to be calendered into a sheet, the sheet is cut according to the requirements of the mold, and the mold is sent to a foaming machine for foaming treatment to obtain an EVA foam material.

[0072] A shoe sole without pores, the shoe sole is made by a method of integrally hot-pressing the midsole and the outsole, the shoe sole comprises an outsole and a midsole, the outsole is provided with pores penetrating the upper and lower surfaces thereof, the pores are evenly distributed on the outsole body, the outsole is arranged at the bottom of the midsole, and the outsole and the midsole are integrally pressed and formed.

[0073] The difference between this comparative example and the above-mentioned Example 2 is that POE and rosin resin are not added to the raw materials of the EVA foam material of this comparative example. The rest of the contents of this comparative example are the same as those of Example 2, and will not be repeated here.

[0074] The difference between this comparative example and the above-mentioned Example 2 is that the anti-slip agent in the raw material of the EVA foam material of this comparative example is only dioctyl ester. The rest of the contents of this comparative example are the same as those of Example 2, and will not be repeated here.

[0075] The difference between this comparative example and the above-mentioned Example 2 is that the filler in the raw material of the EVA foam material of this comparative example is only white carbon black. The rest of the contents of this comparative example are the same as those of Example 2, and will not be repeated here.

[0076] The outsoles made of EVA foam materials obtained in Example 2 and Comparative Example 1 were subjected to the following performance tests, and the results are shown in Table 1: Wear resistance: Using MMW-1A universal friction and wear tester, the finished sheet sole was clamped between two protrusions of the metal seat, and a thrust ring with a diameter of 4 cm was used to act on the friction sample for friction and wear test. The friction force was adjusted to 80N, the friction rate was 80r / min, the friction time was 40min, and the mass of the finished product before friction was 150g; Anti-slip performance: Dry interface anti-slip performance test and wet interface anti-slip performance test are carried out in accordance with the standard GB / T3903.6-2017 "General Test Method for Anti-slip Performance of Footwear"; Rebound rate: The rebound rate of each sole was tested using a GT-7042-RE impact elasticity testing machine; Tensile strength and elongation at break: The tensile properties of the samples were tested using an RT-10 electronic universal testing machine. The tensile strength and elongation at break were used to characterize the tensile properties of the composite material. The standard sample used for the test was in the dumbbell shape specified in the test standard, with the upper and lower ends parallel to each other and perpendicular to the axis. Each sample was tested three times and the average value was taken. The loading speed was 500 mm / min. Test standard: GB / T528-2009.

[0077] The outsole made of the EVA foam material prepared in Comparative Example 2 was tested for anti-slip performance, and the results are shown in Table 1; the outsole made of the EVA foam material prepared in Comparative Example 3 was tested for wear resistance and rebound performance, and the results are shown in Table 1: Table 1 project Damage resistance / g Friction coefficient (dry) Friction coefficient (wet) Rebound rate / % Tensile strength / MPa Elongation at break / % Example 3 0.0102 0.87 0.36 68 10.25 1215.4 Comparative Example 1 8.0324 0.78 0.32 48 6.75 915.6 Comparative Example 2 / 0.47 0.13 / / / Comparative Example 3 6.8723 / / 35 / / It can be seen from Example 2 that the EVA foam material prepared in the present invention has good shock absorption performance, anti-slip effect and other properties, and also has good wear resistance, high resilience, and excellent tensile strength mechanical properties.

[0078] From the comparison between Example 3 and Comparative Examples 1-2, it can be seen that the EVA foam material prepared by adding POE and rosin resin, composite anti-slip agent and composite filler to the formula under the same conditions has good shock absorption performance, anti-slip effect and other properties, and also has good wear resistance, high rebound, excellent tensile mechanical properties, and has broad market prospects and application value.

[0079] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A method for integrally hot pressing a midsole and an outsole, characterized in that: The steps include: S1. Take a foamed sole sheet, cut out soles of different shapes using a sole cutting mold according to needs, and perform perforation treatment on the cut soles so that the obtained soles have evenly distributed pores penetrating the upper and lower surfaces thereof for standby use; S2, take the foamed midsole, which has no perforations, clean the surface of the midsole, and set it aside; S3, putting the cut outsole into a pressing mold, then putting the midsole into the pressing mold and making the surface of the midsole fit the inner side of the outsole, covering the pressing mold, transferring the pressing mold to the working table of the pressing machine, pressurizing and heating for secondary hot pressing, and after cooling, obtaining the sole.

2. The method for integrally hot-pressing a midsole and an outsole according to claim 1, characterized in that: The large bottom plate material is one or more of EVA foam material, TPU foam material, Peba foam material, TPE foam material, OBCS foam material, EPDM foam material, SBS foam material, and POE foam material.

3. The method for integrally hot-pressing a midsole and an outsole according to claim 2, characterized in that: The EVA foaming material comprises the following raw materials: EVA copolymer, POE, rosin resin, foaming agent, cross-linking agent, activator, filler, graphene, chain extender and anti-slip agent.

4. The method for integrally hot-pressing a midsole and an outsole according to claim 3, characterized in that: The EVA copolymer comprises EVA copolymer 1 and EVA copolymer 2, wherein the content of vinyl acetate in EVA copolymer 1 is 50-80%, and the content of vinyl acetate in EVA copolymer 2 is 10-20%.

5. The method for integrally hot-pressing a midsole and an outsole according to claim 3, characterized in that: The foaming agent is one or more of azodicarbonamide, sodium carbonate, sodium bicarbonate and zinc oxide.

6. The method for integrally hot-pressing a midsole and an outsole according to claim 3, characterized in that: The cross-linking agent is one or more of dicumyl peroxide and 1,4-di-tert-butyl peroxycumene.

7. The method for integrally hot-pressing a midsole and an outsole according to claim 3, characterized in that: The filler is one or more of white carbon black, titanium dioxide, talcum powder, modified white corundum, white rubber powder and mica.

8. The method for integrally hot-pressing a midsole and an outsole according to claim 3, characterized in that: The chain extender is one or more of ethylene glycol, propylene glycol, neopentyl glycol and methyl propylene glycol.

9. A shoe sole without air holes, characterized in that: The sole is made by the method of integrally hot-pressing the midsole and the outsole as described in any one of claims 1 to 8.

10. The shoe sole without air holes according to claim 9, characterized in that: The shoe sole comprises an outsole and a midsole. The outsole is provided with air holes penetrating the upper and lower surfaces thereof. The air holes are evenly distributed on the outsole body. The outsole is arranged at the bottom of the midsole, and the outsole and the midsole are pressed and formed as one body.