A lightweight anti-slip EVA material for shoes and a preparation method thereof

Abstract

The present invention relates to the technical field of EVA anti-skid materials, and in particular to a lightweight anti-skid EVA material for shoe materials and a preparation method thereof. A lightweight anti-skid EVA material for shoe materials comprises the following substances in parts by weight: 80-120 parts of EVA resin, 3-7 parts of talcum powder, 0.1-1.0 parts of zinc stearate, 0.5-1.5 parts of zinc oxide, 2-3 parts of cross-linking agent, 2-3 parts of foaming agent, and 5-8 parts of anti-skid modified particles; the anti-skid modified particles are non-spherical silica particles. The present application adds non-spherical silica particles to the EVA material as an anti-skid performance modifying material. Due to the introduction of non-spherical silica particles, the friction coefficient of the material is further enhanced, so that the prepared EVA material can effectively prevent skidding in various environments, ensuring the safety of users during walking.

Description

Technical Field

[0001] The invention relates to the technical field of EVA anti-skid materials, and in particular to a lightweight anti-skid EVA material for shoes and a preparation method thereof. Background Art

[0002] Ethylene-vinyl acetate copolymer, also known as EVA, is a widely used ethylene copolymer and also an important plastic synthetic resin. EVA has low density and good softness and elasticity, high tensile strength, high shockproof ability, that is, high cushioning performance, and strong toughness; it is suitable for various climates and environments, and can withstand the lowest temperature of minus 58°C; it also has excellent ozone resistance, good processing performance and colorability. Foamed EVA has the advantages of softness, high elasticity, and shock absorption. Its excellent plasticity and elasticity are very suitable for use as the midsole of sports shoes.

[0003] The anti-slip property of the sole refers to the grip of the outer sole on the ground or the anti-slip effect when people walk. Qualified sports shoes should have certain anti-slip properties, which is also an important indicator for judging the quality of shoes. However, the friction coefficient of EVA foam soles without any anti-slip treatment is usually less than 0.5, which means that the anti-slip performance of EVA foam soles without anti-slip treatment is not within the safety standard range.

[0004] According to the above related technologies, the existing EVA foam material has poor anti-slip performance when used as a sole material, which can easily cause the wearer to slip. Summary of the invention

[0005] In order to improve the defect of poor anti-slip performance of existing EVA foam materials, the present application provides a lightweight anti-slip EVA material for shoes and a preparation method thereof.

[0006] In the first aspect, the present application provides a lightweight anti-slip EVA material for shoes, which adopts the following technical solution:

[0007] A lightweight anti-skid EVA material for shoes comprises the following substances in parts by weight: 80-120 parts of EVA resin, 3-7 parts of talc, 0.1-1.0 parts of zinc stearate, 0.5-1.5 parts of zinc oxide, 2-3 parts of a cross-linking agent, 2-3 parts of a foaming agent, and 5-8 parts of anti-skid modified particles; the anti-skid modified particles are non-spherical silicon dioxide particles.

[0008] Through the above technical scheme, the present application adds non-spherical silica particles to the EVA material as an anti-slip performance modifying material. Due to the introduction of non-spherical silica particles, the friction coefficient of the material is further enhanced, so that the prepared EVA material can effectively prevent slipping in various environments, ensuring the safety of users during walking.

[0009] Furthermore, the non-spherical silica particles include multi-branched silica particles, chain-shaped silica particles and dumbbell-shaped silica particles.

[0010] Through the above technical solution, the present application optimizes the specific structure of non-spherical silica particles, and selects silica particles of different forms to provide a variety of anti-slip properties, increase the roughness of the material surface, and thus improve friction. This diverse particle distribution can adapt to different friction requirements on different contact surfaces, ensuring superior performance under different weather and ground conditions. At the same time, the structure of non-spherical particles can reduce the sliding of the material to a certain extent, thereby improving the overall wear resistance and service life, meeting the high requirements of modern shoe materials for functionality and durability.

[0011] Furthermore, the non-spherical silica particles are multi-branched silica particles, which are prepared by the following scheme:

[0012] Take nickel nitrate and add deionized water, stir and mix, and collect the mixed solution;

[0013] Add ethanol and ammonia water to the mixed solution, stir and mix, and collect the reaction solution;

[0014] After adding ethanol and ethyl orthosilicate to the reaction solution, stirring and mixing, leaving the mixture to stand, filtering, washing and drying, the multi-branched dry silicon dioxide particles can be prepared.

[0015] Through the above technical scheme, the present application selects nickel nitrate as the main modified material. The addition of nickel ions in nickel nitrate can promote the growth of silica particles, increase their particle size, and induce silica to form a multi-branched morphology. The multi-branched structure can effectively enhance the adhesion and strength of the material in the composite material, and while effectively improving the anti-slip properties of the EVA material, it can also further improve the bonding performance between the anti-slip modified particles and the EVA material.

[0016] Furthermore, the anti-slip modified particles also include ultra-high molecular weight polyethylene particles, and the mixing ratio of the ultra-high molecular weight polyethylene particles to the non-spherical silica particles is (1.3-1.5):0.8.

[0017] Through the above technical scheme, the present application introduces ultra-high molecular weight polyethylene particles, further enhances the performance of anti-slip modified particles, so that the shoe material can still maintain good friction performance under various environments. Ultra-high molecular weight polyethylene has excellent wear resistance and toughness, can significantly improve the durability of the sole, and reduce the wear rate. At the same time, ultra-high molecular weight polyethylene is mixed with a specific ratio of non-spherical silica particles, so that the internal structure of the shoe material is more stable, and better bearing capacity and impact resistance are provided. While effectively improving the physical properties of EVA materials, the comfort and safety of shoes after long-term use are also improved, meeting the needs of high-intensity sports or harsh environments.

[0018] Furthermore, an interface modification layer is provided on the surface of the anti-slip modified particles, and the interface modification layer is an EPDM / EVA-g-MAH coating layer.

[0019] Through the above technical scheme, the present application adopts the design of EPDM / EVA-g-MAH coating layer, which significantly improves the compatibility between particles and matrix materials. This modified layer can effectively enhance the bonding force between particles and EVA materials, reduce the shedding phenomenon of particles during use, and extend the service life of footwear materials. The introduction of the interface modified layer not only improves the overall structural strength of the footwear material, but also enables the material to maintain good performance under high temperature or humid environment. In addition, the design of the modified layer can also improve the aging resistance and chemical resistance of the material to a certain extent, so that the product can maintain stable performance under a variety of environments, meeting the market demand for high-performance footwear materials.

[0020] Furthermore, the lightweight anti-slip EVA material for shoes also includes an anti-slip modified resin, and the anti-slip modified resin includes at least one of EPDM, SBS and SEBS.

[0021] Through the above technical scheme, the present application adds an anti-slip modified resin to the lightweight anti-slip EVA material, which not only improves the impact resistance of the material, but also the above-mentioned anti-slip modified resin can effectively combine with the EVA resin and improve the adhesion of the EVA resin, so that when the EVA material contacts the contact surface, its adhesion effect is increased, resulting in an increase in the overall friction resistance, thereby improving the anti-slip performance.

[0022] Furthermore, the anti-slip modified resin is EPDM, and the anti-slip modified particles are made by the following scheme:

[0023] Non-spherical silica particles, ultra-high molecular weight polyethylene particles, EPDM, EVA resin, MAH, DBPH, styrene and antioxidant are mixed and stirred, placed in a torque rheometer, heated and melted, and then cut and granulated to prepare the anti-slip modified particles.

[0024] Through the above technical scheme, the present application optimizes the surface structure of the anti-slip modified particles and the bonding mode with the anti-slip modified resin. By coating the surface of the anti-slip modified particles with an EPDM / EVA-g-MAH coating layer, the anti-slip modified particles are used as an interface compatible modified material. While the anti-slip modified particles are effectively dispersed and bonded with the EVA material, the bonding strength between the anti-slip modified resin material and the EVA resin material is improved, thereby effectively improving the anti-slip performance of the EVA material while improving its mechanical strength.

[0025] Furthermore, the mixing ratio of the non-spherical silica particles, EPDM, EVA resin, MAH and styrene in the anti-slip modified particles is 0.8:0.4:0.6:0.15:0.25.

[0026] In the second aspect, the present application provides a method for preparing a lightweight anti-slip EVA material for shoes, using the following technical solution:

[0027] A method for preparing a lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0028] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer. After mixing, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and anti-slip modified particles can be added. The mixed rubber is discharged to a thin sheet on an open mixer. After being parked for 24 hours, it is molded, vulcanized and foamed in a flat vulcanizer to prepare the lightweight anti-slip EVA material for shoes.

[0029] Through the above technical scheme, the present application effectively integrates various formula components and improves preparation efficiency. Through the mixing process of the internal mixer, different ingredients can be fully mixed to ensure that each component is evenly distributed, thereby improving the overall performance of the material. Subsequent refining, molding and foaming processes can achieve the final shaping and performance improvement of the material. Such a preparation process not only improves production efficiency, but also provides a guarantee for product quality and ensures the performance stability of each batch of products. In addition, the implementation of this method can provide feasibility for large-scale production, reduce production costs, and meet the market demand for cost-effective shoe materials.

[0030] In summary, this application has the following beneficial effects:

[0031] First, the present application adds non-spherical silica particles to the EVA material as an anti-slip performance modifying material. Due to the introduction of non-spherical silica particles, the friction coefficient of the material is further enhanced, so that the prepared EVA material can effectively prevent slipping in various environments, ensuring the safety of users during walking.

[0032] This application optimizes the specific structure of non-spherical silica particles, and selects silica particles of different forms to provide a variety of anti-slip properties, increase the roughness of the material surface, and thus improve friction. This diverse distribution of particles can adapt to different friction requirements on different contact surfaces, ensuring superior performance under different weather and ground conditions. At the same time, the structure of non-spherical particles can reduce the sliding of the material to a certain extent, thereby improving the overall wear resistance and service life, meeting the high requirements of modern shoe materials for functionality and durability.

[0033] Second, the present application introduces ultra-high molecular weight polyethylene particles to further enhance the performance of anti-slip modified particles, so that the shoe material can still maintain good friction performance under various environments. Ultra-high molecular weight polyethylene has excellent wear resistance and toughness, which can significantly improve the durability of the sole and reduce the wear rate. At the same time, ultra-high molecular weight polyethylene is mixed with a specific ratio of non-spherical silica particles, making the internal structure of the shoe material more stable, providing better bearing capacity and impact resistance, while effectively improving the physical properties of EVA materials, it also improves the comfort and safety of shoes after long-term use, meeting the needs of high-intensity sports or harsh environments.

[0034] Third, the present application optimizes the surface structure of the anti-slip modified particles and the bonding mode with the anti-slip modified resin. On the one hand, by coating the surface of the anti-slip modified particles with an EPDM / EVA-g-MAH coating layer, the anti-slip modified particles are used as an interface compatible modified material. While the anti-slip modified particles are effectively dispersed and bonded with the EVA material, the bonding strength between the anti-slip modified resin material and the EVA resin material is improved, thereby effectively improving the anti-slip performance of the EVA material while improving its mechanical strength. On the other hand, EPDM as an anti-slip resin can significantly improve the wet anti-slip performance of the EVA material. By improving the technical solution of improving the dry anti-slip performance and wet anti-slip performance of EVA, the anti-slip performance of the lightweight anti-slip EVA material is further improved. DETAILED DESCRIPTION

[0035] The present application is further described in detail below with reference to the embodiments.

[0036] In the examples of the present application, the raw materials and instruments used are as follows, but not limited thereto. Raw materials not otherwise specified are of analytical grade.

[0037] Preparation Example 1

[0038] Multi-branched silicon dioxide particles:

[0039] Take 20g of nickel nitrate and add 4000g of deionized water, stir and mix, and collect the mixed solution;

[0040] Add 800 g of 30% ethanol and 200 g of 15% ammonia water to 400 g of the mixed solution, stir and mix, and collect the reaction solution;

[0041] After adding 3000 g of anhydrous ethanol and 1500 g of ethyl orthosilicate to 5000 g of the reaction solution, stirring and mixing for 2 h, and then standing at room temperature for 24 h, filtering, washing and drying at 60° C., the multi-branched dry silica particles can be prepared.

[0042] Preparation Example 2

[0043] Anti-slip modified particles 1.

[0044] 130 g of ultra-high molecular weight polyethylene particles, 80 g of multi-branched dry silica particles, 40 g of EPDM, 60 g of EVA resin particles, 15 g of maleic anhydride, 3 g of vulcanizing agent DBPH, 25 g of styrene and 5 g of antioxidant 1010 were mixed and placed in a multifunctional torque rheometer, melt-treated at 180° C. and 50 rpm for 5 min, and cut into particles to prepare the anti-slip modified particles 1.

[0045] Preparation Example 3

[0046] Anti-slip modified particles2.

[0047] 140 g of ultra-high molecular weight polyethylene particles, 80 g of multi-branched dry silica particles, 40 g of EPDM, 60 g of EVA resin particles, 15 g of maleic anhydride, 3 g of vulcanizing agent DBPH, 25 g of styrene and 5 g of antioxidant 1010 were mixed and placed in a multifunctional torque rheometer, melt-treated at 180° C. and 50 rpm for 5 min, cut and granulated to obtain the anti-slip modified particles 2.

[0048] Preparation Example 4

[0049] Anti-slip modified particles3.

[0050] 150 g of ultra-high molecular weight polyethylene particles, 80 g of multi-branched dry silica particles, 40 g of EPDM, 60 g of EVA resin particles, 15 g of maleic anhydride, 3 g of vulcanizing agent DBPH, 25 g of styrene and 5 g of antioxidant 1010 were mixed and placed in a multifunctional torque rheometer, melt-treated at 180° C. and 50 rpm for 5 min, cut and granulated to obtain the anti-slip modified particles 3. Example 1

[0051] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0052] 80kg EVA resin, 3kg talcum powder, 0.3kg zinc stearate, 0.5kg zinc oxide, 2kg cross-linking agent diisopropyl peroxide, 2kg foaming agent azodicarbonamide, and 5kg multi-branched dry silica particles.

[0053] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0054] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent azodicarbonamide, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and multi-branched dry silica particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed at 175° C. for 380 seconds in a flat vulcanizer, and the pressing pressure is controlled to be 20 MPa. The lightweight anti-slip EVA material for footwear can be prepared by molding, vulcanization and foaming. Example 2

[0055] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0056] 100kg EVA resin, 5kg talcum powder, 0.5kg zinc stearate, 1.0kg zinc oxide, 2.5kg cross-linking agent diisopropyl peroxide, 2.5kg foaming agent azodicarbonamide, 6kg multi-branched dry silica particles.

[0057] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0058] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and multi-branched dry silica particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and mold vulcanization and foaming are performed to prepare the lightweight anti-slip EVA material for footwear. Example 3

[0059] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0060] 120kg EVA resin, 7kg talcum powder, 1.0kg zinc stearate, 1.5kg zinc oxide, 3kg cross-linking agent diisopropyl peroxide, 3kg foaming agent azodicarbonamide, 8kg multi-branched dry silica particles.

[0061] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0062] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and multi-branched dry silica particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and mold vulcanization and foaming are performed to prepare the lightweight anti-slip EVA material for footwear. Example 4

[0063] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0064] 100kg EVA resin, 5kg talc, 0.5kg zinc stearate, 1.0kg zinc oxide, 2.5kg cross-linking agent diisopropyl peroxide, 2.5kg foaming agent azodicarbonamide, 2.28kg multi-branched dry silica particles and 3.72kg ultra-high molecular weight polyethylene particles.

[0065] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0066] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent, multi-branched dry silica particles and ultra-high molecular weight polyethylene particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and molded, vulcanized and foamed to prepare the lightweight anti-slip EVA material for footwear. Example 5

[0067] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0068] 100kg EVA resin, 5kg talc, 0.5kg zinc stearate, 1.0kg zinc oxide, 2.5kg cross-linking agent diisopropyl peroxide, 2.5kg foaming agent azodicarbonamide, 2.18kg multi-branched dry silica particles and 3.82kg ultra-high molecular weight polyethylene particles.

[0069] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0070] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent, multi-branched dry silica particles and ultra-high molecular weight polyethylene particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and molded, vulcanized and foamed to prepare the lightweight anti-slip EVA material for footwear. Example 6

[0071] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0072] 100kg EVA resin, 5kg talc, 0.5kg zinc stearate, 1.0kg zinc oxide, 2.5kg cross-linking agent diisopropyl peroxide, 2.5kg foaming agent azodicarbonamide, 2.09kg multi-branched dry silica particles and 3.91kg ultra-high molecular weight polyethylene particles.

[0073] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0074] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent, multi-branched dry silica particles and ultra-high molecular weight polyethylene particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and molded, vulcanized and foamed to prepare the lightweight anti-slip EVA material for footwear. Example 7

[0075] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0076] 100kg EVA resin, 5kg talc, 0.5kg zinc stearate, 1.0kg zinc oxide, 2.5kg cross-linking agent diisopropyl peroxide, 2.5kg foaming agent azodicarbonamide, 6kg anti-slip modified particles 1.

[0077] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0078] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and anti-slip modified particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and mold vulcanization and foaming are performed to prepare the lightweight anti-slip EVA material for footwear. Example 8

[0079] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0080] 100kg EVA resin, 5kg talcum powder, 0.5kg zinc stearate, 1.0kg zinc oxide, 2.5kg cross-linking agent diisopropyl peroxide, 2.5kg foaming agent azodicarbonamide, 6kg anti-slip modified particles 2.

[0081] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0082] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and anti-slip modified particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and mold vulcanization and foaming are performed to prepare the lightweight anti-slip EVA material for footwear. Example 9

[0083] A lightweight non-slip EVA material for shoes, prepared from the following substances:

[0084] 100kg EVA resin, 5kg talcum powder, 0.5kg zinc stearate, 1.0kg zinc oxide, 2.5kg cross-linking agent diisopropyl peroxide, 2.5kg foaming agent azodicarbonamide, 6kg anti-slip modified particles 3.

[0085] A lightweight anti-slip EVA material for shoes, comprising the following preparation steps:

[0086] The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer at 80° C. After mixing for 5 minutes, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and anti-slip modified particles can be added, the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is pressed in a flat vulcanizer at 175° C. for 380 seconds, the pressing pressure is controlled to be 20 MPa, and mold vulcanization and foaming are performed to prepare the lightweight anti-slip EVA material for footwear.

[0087] It should be noted that the anti-slip modified resin used in the present application includes but is not limited to at least one of EPDM, SBS and SEBS.

[0088] Comparative Example

[0089] Compared with Example 1, no anti-slip modified particles were added in this comparative example, and the rest of the technical solutions were the same as those in Example 1.

[0090] Performance Testing

[0091] The anti-slip properties of the lightweight anti-slip EVA materials prepared in Examples 1-9 and the EVA materials prepared in the comparative example were tested:

[0092] Anti-slip performance test: according to ASTM F1677-05 standard;

[0093] Experimental principle: By applying a certain external force to the test sample, horizontal and vertical forces are generated between the test sample and the simulated road surface, and the friction coefficient of the test sample is evaluated based on the force balance analysis in physics.

[0094] The results are shown in Table 1 below:

[0095] Table 1 Performance test table

[0096]

[0097] From the above examples 1-9 and the comparative example, combined with the test results of Table 1, it can be found that:

[0098] From the comparison of Examples 1-3 and the comparative example, it is explained that the technical solution of the present application adds non-spherical silica particles to the EVA material as a non-slip performance modifying material. Due to the introduction of non-spherical silica particles, the roughness of the material surface is increased, thereby improving the friction. This diversified particle distribution can adapt to different friction requirements on different contact surfaces, ensuring superior performance under different weather and ground conditions. At the same time, the structure of the non-spherical particles can reduce the sliding property of the material to a certain extent, thereby improving the overall wear resistance and service life, and meeting the high requirements of modern shoe materials for functionality and durability.

[0099] By comparing the technical solutions of Examples 4-5 with those of Examples 1-3, it can be found that the present application introduces ultra-high molecular weight polyethylene particles, further enhancing the performance of anti-slip modified particles, so that the shoe material can still maintain good friction properties under various environments. Ultra-high molecular weight polyethylene has excellent wear resistance and toughness, can significantly improve the durability of the sole, and reduce the wear rate. At the same time, ultra-high molecular weight polyethylene is mixed with a specific ratio of non-spherical silica particles, so that the internal structure of the shoe material is more stable, and better bearing capacity and impact resistance are provided, while effectively improving the physical properties of the EVA material, the comfort and safety of the shoes after long-term use are also improved, and the needs of high-intensity sports or harsh environments are met.

[0100] Finally, by comparing Examples 7-9 with Examples 1-6, it is further illustrated that the application optimizes the surface structure of the anti-slip modified particles and the bonding mode with the anti-slip modified resin, and by coating the surface of the anti-slip modified particles with an EPDM / EVA-g-MAH coating layer so that they serve as an interface compatible modified material, the anti-slip modified particles are effectively dispersed and bonded with the EVA material while improving the bonding strength between the anti-slip modified resin material and the EVA resin material, thereby effectively improving the anti-slip performance of the EVA material while improving its mechanical strength.

[0101] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

[0102] All publications, patent applications, patents and other references mentioned in this specification are incorporated herein by reference. Unless otherwise defined, all technical and scientific terms used in this specification have the meanings conventionally understood by those skilled in the art. In the event of a conflict, the definition in this specification shall prevail.

[0103] When this specification uses the prefix "well-known to those skilled in the art", "prior art" or similar terms to introduce materials, substances, methods, steps, devices or components, etc., the objects introduced by the prefix cover those commonly used in the art when this application is filed, but also include those that are not commonly used at present but will become recognized in the art as being suitable for similar purposes.

[0104] In the context of the present specification, any matters or items not mentioned are directly applicable to those known in the art without any changes except those explicitly stated.

Claims

1. A lightweight non-slip EVA material for shoes, characterized in that: The composition includes the following materials in parts by weight: 80-120 parts of EVA resin; 3-7 parts of talcum powder; Zinc stearate 0.1-1.0 part; Zinc oxide 0.5-1.5 parts; 2-3 parts of cross-linking agent; 2-3 parts of foaming agent; 5-8 parts of anti-slip modified particles; The anti-slip modified particles are non-spherical silica particles; The lightweight non-slip EVA material for shoes also includes a non-slip modified resin, the non-slip modified resin is EPDM, and the non-slip modified particles are made by the following scheme: Non-spherical silica particles, ultra-high molecular weight polyethylene particles, EPDM, EVA resin, MAH, DBPH, styrene and antioxidant are mixed and stirred, placed in a torque rheometer, heated and melted, and then cut and granulated to prepare the anti-slip modified particles; The mixing ratio of the ultra-high molecular weight polyethylene particles to the non-spherical silica particles is (1.3-1.5):0.

8.

2. A lightweight non-slip EVA material for shoes according to claim 1, characterized in that: The non-spherical silica particles include multi-branched stem-shaped silica particles, chain-shaped silica particles and dumbbell-shaped silica particles.

3. A lightweight non-slip EVA material for shoes according to claim 1, characterized in that: The non-spherical silica particles are multi-branched dry silica particles, which are prepared by the following scheme: Take nickel nitrate and add deionized water, stir and mix, and collect the mixed solution; Add ethanol and ammonia water to the mixed solution, stir and mix, and collect the reaction solution; After adding ethanol and ethyl orthosilicate to the reaction solution, stirring and mixing, leaving the mixture to stand, filtering, washing and drying, the multi-branched dry silicon dioxide particles can be prepared.

4. The lightweight non-slip EVA material for shoes according to claim 1, characterized in that: An interface modification layer is arranged on the surface of the anti-slip modified particles, and the interface modification layer is an EPDM / EVA-g-MAH coating layer.

5. The lightweight non-slip EVA material for shoes according to claim 1, characterized in that: The mixing ratio of the non-spherical silica particles, EPDM, EVA resin, MAH and styrene in the anti-slip modified particles is 0.8:0.4:0.6:0.15:0.

25.

6. A method for preparing a lightweight anti-skid EVA material for shoes, used for preparing the lightweight anti-skid EVA material for shoes according to any one of claims 1 to 5, characterized in that: The method comprises the following preparation steps: The EVA resin and the anti-slip modified resin in the formula components are placed in an internal mixer, and after mixing, a foaming agent, talcum powder, zinc stearate, zinc oxide, a cross-linking agent and anti-slip modified particles are added, and the mixed rubber is discharged to a thin sheet on an open mixer, and after being parked for 24 hours, it is molded, vulcanized and foamed in a flat vulcanizer to prepare the lightweight anti-slip EVA material for shoes.

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