Antiskid shoe sole material and method for manufacturing the same

Abstract

The application belongs to the technical field of shoe sole materials, and specifically discloses an antiskid shoe sole material and a preparation method thereof. The antiskid shoe sole material comprises a shoe sole body, the shoe sole body comprises an antiskid layer and a rubber layer, and the raw material components of the antiskid layer comprise, in weight parts, 50-55 parts of polyurethane, 16-20 parts of silicon carbide composite material, 10-14 parts of polyethylene composite fiber, 4-8 parts of maleic anhydride grafted polyethylene octene elastomer, 3-5 parts of silane coupling agent, 1-2 parts of antioxidant and 0.5-0.8 parts of lubricant. The antiskid shoe sole material prepared in the application has excellent mechanical strength, antiskid property and wear resistance, can provide protection for feet, and prolongs the service life of the shoe sole.

Description

Technical Field

[0001] This application relates to the technical field of shoe sole materials, and in particular to an anti-slip shoe sole material and its preparation method. Background Technology

[0002] Shoes are an indispensable daily necessity, primarily serving to protect feet from environmental damage and ensure safe walking. As living standards improve, people have increasingly higher demands for shoes, especially children's shoes. Children are in a crucial stage of growth and development, with their foot shape and bones not yet fully formed, requiring more stringent standards in terms of functionality, comfort, and safety.

[0003] Children's shoes are classified by function into toddler shoes, sports shoes, functional shoes, rain boots, and warm boots. Among them, toddler shoes are designed specifically for babies who are learning to walk. They are designed according to the baby's foot condition and gait characteristics to help the baby learn to walk. They usually have thin and soft soles, and the toe and heel have a certain degree of hardness to protect the toes and ankles and help the little feet develop.

[0004] The choice and construction of the sole material of toddler shoes can affect a baby's enthusiasm for learning to walk. To adapt to the walking needs of toddlers, toddler shoes usually use softer materials for the sole (such as rubber, EVA, TPR, etc.). These materials are elastic and lightweight, which can reduce the restriction on the feet, but their wear resistance is relatively weaker than the hard soles of adult shoes, and they are prone to wear after long-term friction with the ground. Summary of the Invention

[0005] To address the issue of wear and tear on the soles of toddler shoes after prolonged friction with the ground, this application provides an anti-slip sole material and its preparation method.

[0006] This application provides a non-slip shoe sole material, employing the following technical solution:

[0007] A non-slip shoe sole material includes a sole body, the sole body comprising a non-slip layer and a rubber layer, wherein the raw material components of the non-slip layer, by weight, include: 50-55 parts polyurethane, 16-20 parts silicon carbide composite material, 10-14 parts polyethylene composite fiber, 4-8 parts maleic anhydride grafted polyethylene octene elastomer, 3-5 parts silane coupling agent, 1-2 parts antioxidant, and 0.5-0.8 parts lubricant.

[0008] By employing the above technical solutions, the anti-slip layer achieves anti-slip, wear-resistant, and basic mechanical properties, directly contacting the ground to prevent slipping. The rubber layer utilizes the excellent elasticity and resilience of rubber to absorb the impact force during walking, reducing pressure on the feet and joints, while enhancing the overall flexibility of the sole.

[0009] In the anti-slip layer, polyurethane provides excellent abrasion resistance, elasticity, flexibility, oil resistance, and good processability, contributing to grip on wet, slippery surfaces. Silicon carbide composites possess excellent abrasion resistance, compressive strength, and thermal conductivity, forming microscopic, hard protrusions on the sole surface, significantly enhancing friction with the ground and providing the core anti-slip function, while greatly improving the sole's lifespan. Polyethylene composite fibers effectively improve the material's tear strength, impact resistance, and dimensional stability, better bonding with the polyurethane matrix to form a three-dimensional network structure, enhancing overall mechanical properties, preventing cracking or excessive deformation of the sole during use, and indirectly supporting the stability of the anti-slip structure.

[0010] Maleic anhydride-grafted polyethylene octene elastomers significantly improve the low-temperature toughness, impact resistance, and flexibility of polyurethane. The grafting of maleic anhydride introduces polar anhydride groups, greatly enhancing its compatibility and bonding with polar polyurethane matrices and inorganic fillers (such as silicon carbide composites). This helps improve filler dispersion and enhances the overall material uniformity and mechanical properties. Silane coupling agents are used to improve the interfacial bonding between inorganic fillers (silicon carbide composites) and the organic polymer matrix (polyurethane). The alkoxy group at one end of the silane coupling agent molecule, after hydrolysis, reacts with the hydroxyl groups on the filler surface, while the organic functional groups at the other end (such as amino, epoxy, mercapto, and vinyl groups) react with polyurethane groups or form physical entanglements. This improves filler dispersibility and interfacial adhesion, thereby significantly enhancing the mechanical strength (tensile and tear strength), abrasion resistance, water resistance, and the durability of the anti-slip effect of the composite material.

[0011] Antioxidants inhibit oxidation reactions in polyurethane, elastomers, and other components during processing (high temperature) and use (light exposure, oxygen), preventing materials from becoming brittle, discolored, or experiencing performance degradation (such as loss of slip resistance and elasticity), thus extending the lifespan of the shoe sole. Lubricants, during mixing and molding, reduce melt viscosity, decrease internal friction, improve filler dispersion, make it easier for materials to fill the mold, and facilitate product demolding, thereby improving production efficiency and surface finish. Silicon carbide composites achieve excellent slip resistance and abrasion resistance, polyurethane provides basic elasticity and abrasion resistance, polyethylene composite fibers enhance tear resistance and dimensional stability, and maleic anhydride-grafted polyethylene octene co-elastomer improves compatibility. The synergistic effect of these multiple components ensures the shoe sole's excellent flexibility and durability.

[0012] Preferably, the method for preparing the silicon carbide composite material includes the following steps:

[0013] (1) Mix silicon carbide powder, alumina powder and boron nitride, and grind them at 500-550 r / min for 2-3 h to obtain a mixture;

[0014] (2) Mix the mixture from step (1), nano silicon carbide whiskers, sodium alginate, and deionized water evenly, calcine at 600-650℃ for 1-2 hours, and then calcine at 1000-1100℃ for 3-4 hours to obtain the modified material.

[0015] (3) Disperse the modified phenolic resin in an ethanol aqueous solution, stir evenly, add it to the modified material in step (2), stir at 65-70℃ for 1-2 hours, and dry to obtain silicon carbide composite material.

[0016] By adopting the above technical solutions, silicon carbide powder possesses high hardness and excellent wear resistance, providing the surface roughness required for anti-slip properties. Alumina powder has high hardness and good chemical stability, synergistically enhancing wear resistance with silicon carbide while reducing the brittleness of pure silicon carbide. Boron nitride exhibits excellent lubricity, high-temperature stability, and thermal conductivity, ensuring uniform mixing of the mixture and improving the frictional properties, high-temperature stability, and thermal conductivity of the final composite material. The grinding process refines the particle size, increasing the specific surface area of ​​the powder, which is beneficial for subsequent calcination.

[0017] The mixture, nano-silicon carbide whiskers, sodium alginate, and deionized water are first calcined at 600-650℃. Sodium alginate acts as a temporary binder, preventing excessive sintering due to uneven particle dispersion during calcination. Furthermore, the carbonization and decomposition of sodium alginate at this stage leaves pores in the material. These pores, together with silicon carbide and alumina particles, form a micro-rough surface, increasing the wear resistance of the modified material and preventing excessive growth or agglomeration of the nano-whiskers. Calcination at 1000-1100℃ further enhances the strength, toughness, and wear resistance of the modified material. The nanoscale size and whisker morphology effectively inhibit crack propagation.

[0018] By organically coating the modified material with modified phenolic resin, the compatibility problem between inorganic powder and the organic matrix (polyurethane, polyethylene, etc.) of the anti-slip layer is solved. The organic groups of phenolic resin form intermolecular forces with the matrix materials such as polyurethane, avoiding the agglomeration of inorganic particles, ensuring that the composite material is uniformly dispersed in the anti-slip layer, improving the interfacial adhesion between the filler and the matrix, giving the coating layer better flexibility and toughness, improving the mechanical properties of silicon carbide composite material (especially impact toughness and bending performance), and preventing it from easily falling off under repeated friction and bending, thus maintaining the durability of the anti-slip effect.

[0019] Preferably, the mass ratio of silicon carbide powder, nano silicon carbide whiskers and modified phenolic resin is 1:0.6-0.7:0.1-0.2.

[0020] By adopting the above technical solution, the mass ratio of silicon carbide powder, nano-silicon carbide whiskers, and modified phenolic resin is further limited within a certain range, improving the wear resistance, mechanical properties, and anti-slip properties of the silicon carbide composite material. Silicon carbide powder, with its extremely high hardness, is distributed within the anti-slip layer matrix, resisting wear on the sole from ground friction and extending the sole's lifespan. Nano-silicon carbide whiskers, embedded in the silicon carbide powder structure, enhance the powder's toughness. The fibrous structure of the nano-silicon carbide whiskers can disperse stress through a bridging effect, improving the sole's impact resistance, toughness, and bending force, increasing surface micro-roughness, and forming a multi-level anti-slip structure of particles and fibers with the silicon carbide powder, thus enhancing the sole's anti-slip properties.

[0021] Modified phenolic resin coats silicon carbide powder and nano-silicon carbide whiskers, firmly bonding the dispersed silicon carbide powder and whiskers into a whole, preventing the composite material from falling off during use. Moreover, the modified phenolic resin has a stronger affinity with the polyurethane matrix of the anti-slip layer, which can reduce interface defects between the inorganic and organic phases, ensuring that the composite material is evenly dispersed in the sole material. The three work together to improve the hardness and wear resistance of the silicon carbide composite material, making the composite material both wear-resistant and not brittle. It will not separate due to friction or bending during the use of the sole, thus improving the durability of the sole.

[0022] Preferably, the preparation method of the modified phenolic resin includes the following steps: crushing grape skins, filtering to obtain filtrate, drying the filtrate, dispersing it in an ethanol solution, adding phenolic resin, silane coupling agent KH-550 and nano silica, stirring at 80-85℃ for 2-3 hours, drying, grinding, and obtaining the modified phenolic resin.

[0023] By adopting the above technical solution, the active ingredients (polyphenols, such as proanthocyanidins and resveratrol) in grape skins are extracted, and the water in the filtrate is removed by drying to avoid the interference of water on the system in subsequent reactions.

[0024] The hydroxyl groups of polyphenols can undergo condensation reactions with the hydroxymethyl groups of phenolic resins to form a cross-linked network, introducing natural polyphenols into the resin molecular chain. The rigid aromatic rings and intermolecular hydrogen bonds of polyphenols enhance the mechanical strength of the resin, while their flexible segments improve the brittleness of phenolic resins. The silane coupling agent KH-550 reacts with the hydroxymethyl group of the amino group at one end of the phenolic resin, while the ethoxy group at the other end hydrolyzes to form silanol groups, which condense with the hydroxyl groups on the surface of nano-silica, constructing a chemical bonding bridge between the resin, coupling agent, and nano-silica, thus solving the interfacial compatibility problem between inorganic particles and organic resins.

[0025] Nano-silica fills the gaps between resin molecules, increasing the system's density and hardness, enhancing interfacial bonding with the resin, inhibiting crack propagation, and improving wear resistance and impact resistance. The synergistic effect of multiple components improves the mechanical properties of the modified phenolic resin, ultimately resulting in a modified phenolic resin with strong adhesion, good toughness, excellent heat resistance, and easy dispersibility. This facilitates the subsequent preparation of silicon carbide composites, binds multiple components, and thus improves the overall performance of the shoe sole.

[0026] Preferably, the method for preparing the polyethylene composite fiber includes the following steps:

[0027] (1) Mix polyethylene resin, diatomaceous earth, bamboo charcoal powder and hexanediol, melt extrude, and spin to obtain polyethylene fiber;

[0028] (2) Crush the wood tailings, then disperse them in hydrochloric acid, soak for 10-15 minutes, filter, then disperse them in deionized water, add chitosan, and stir at 80-85℃ for 1-2 hours to obtain a mixture.

[0029] (3) The polyethylene fiber from step (1) is immersed in the mixture from step (2) for 4-6 times, each time for 5-8 seconds, and dried after each immersion to obtain polyethylene composite fiber.

[0030] By adopting the above technical solution, polyethylene resin, as the matrix material, provides the main skeleton and flexibility of the fiber. Diatomaceous earth has a porous structure, which increases the specific surface area of ​​the fiber. Its rigid particles can be embedded between polyethylene molecular chains, which enhances the tensile strength and wear resistance of the fiber through skeleton support and improves the mechanical anchoring force with the resin matrix. The nanopores of bamboo charcoal powder adsorb odors / moisture, release far-infrared rays to improve microcirculation, and have natural antibacterial properties. Hexanediol reduces the viscosity of polyethylene when it melts, promotes the uniform dispersion of diatomaceous earth and bamboo charcoal powder in the resin, avoids fiber breakage caused by filler agglomeration, and improves the flexibility of the fiber.

[0031] Acidic conditions can dissolve inorganic impurities (such as metal salts like calcium and magnesium) in the waste material, while also slightly acidifying some of the glycosidic bonds in lignin and hemicellulose, exposing more hydroxyl groups in cellulose and improving its compatibility with subsequent polar components (chitosan). Chitosan has natural antibacterial and film-forming properties, and can form hydrogen bonds with the cellulose hydroxyl groups in tree waste material, enhancing the film strength of the coating.

[0032] The cellulose microfibers of tree tailings and the chitosan in the coating form a reinforcing-bonding system, which improves the tensile strength, abrasion resistance and fatigue resistance of the fibers. Chitosan imparts antibacterial properties, and the porous structure of bamboo charcoal powder and tree tailings synergistically enhances the adsorption capacity. The resulting polyethylene composite fiber has excellent flexibility and antibacterial properties, which helps to improve the mechanical properties and antibacterial properties of the shoe sole in the future.

[0033] Preferably, the mass ratio of the polyethylene resin, wood waste, and chitosan is 1:0.4-0.5:0.2-0.3.

[0034] By adopting the above technical solution and further limiting the mass ratio of polyethylene resin, tree waste, and chitosan within a certain range, the resulting polyethylene composite fiber exhibits excellent comprehensive properties. Polyethylene resin possesses excellent mechanical strength, chemical resistance, and processing stability, serving as the structural framework of the material. Tree waste, with its porous, abrasion-resistant, and microfiber structure, can be embedded within the polyethylene molecular chain structure, enhancing the tensile strength and abrasion resistance of the polyethylene composite fiber. Chitosan, with its good antibacterial, film-forming, and biocompatibility properties, can coat both polyethylene resin and tree waste, resulting in a tighter bond between the two and further improving the overall stability of the mechanical properties.

[0035] The three components are mixed, with polyethylene as the structural matrix, tree tailings providing natural functionality and rigidity reinforcement, and chitosan as an interfacial bridge. This allows polyethylene resin, tree tailings, and chitosan to form a stable composite structure, improving the stability, antibacterial properties, and wear resistance of the polyethylene composite fiber, thereby enhancing the overall performance of the shoe sole.

[0036] Preferably, the rubber layer is prepared by mixing butyl rubber, cis-butadiene rubber, silica, and antioxidant RD at 110-120°C for 20-30 minutes, then adding vulcanizing agent and vulcanization accelerator 6-GR, and vulcanizing for 40-50 minutes to obtain the rubber layer.

[0037] By employing the above technical solutions, butyl rubber and butadiene rubber are used as matrix materials. Butadiene rubber possesses excellent airtightness, heat resistance, and chemical stability, while butadiene rubber exhibits high elasticity and good wear resistance. The blending of the two achieves complementary properties, balancing elasticity and airtightness. Silica, through physical / chemical bonding with the rubber molecular chains, enhances the tensile strength, wear resistance, and hardness of the rubber, while also improving processing fluidity. Antioxidant RD inhibits aging of the rubber during processing and use caused by heat, oxygen, and light, extending the service life of the rubber layer. Vulcanizing agents and vulcanization accelerator 6-GR transform the rubber from a plastic material into an elastic material, resulting in a rubber layer with excellent elasticity, heat resistance, and dimensional stability.

[0038] Secondly, this application also provides a method for preparing an anti-slip shoe sole material, comprising the following steps: mixing polyurethane, silicon carbide composite material, polyethylene composite fiber, maleic anhydride grafted polyethylene octene co-elastomer, silane coupling agent, antioxidant, and lubricant, and mixing them at 200-210°C for 10-12 minutes to obtain a rubber compound, and molding the rubber compound to obtain an anti-slip layer.

[0039] The anti-slip layer is bonded to the rubber layer, then hot-pressed and dried to obtain the anti-slip shoe sole material.

[0040] By adopting the above technical solution and method, the obtained anti-slip shoe sole material has excellent antibacterial properties, wear resistance and mechanical properties. The synergistic combination of multiple components results in an anti-slip shoe sole material with anti-slip properties, wear resistance, antibacterial properties, aging resistance and interface stability.

[0041] In summary, this application has the following beneficial effects:

[0042] 1. The anti-slip layer in this application achieves anti-slip, wear-resistant and basic mechanical properties, and is in direct contact with the ground to prevent slipping. The rubber layer utilizes the excellent elasticity and resilience of rubber to absorb the impact force during walking, reduce the pressure on the feet and joints, and enhance the overall flexibility of the sole.

[0043] 2. The silicon carbide composite material in this application has excellent wear resistance, compressive strength and thermal conductivity. It can form microscopic hard protrusions on the surface of the shoe sole, which significantly enhances the friction with the ground, provides the core anti-slip function, and greatly improves the wear life of the shoe sole.

[0044] 3. In this application, the polyethylene composite fiber effectively improves the tear strength, impact resistance and dimensional stability of the material, can better bond with the polyurethane matrix to form a three-dimensional network structure, enhance the overall mechanical properties, prevent the sole from cracking or excessively deforming during use, and indirectly support the stability of the anti-slip structure. Detailed Implementation

[0045] The present application will be further described in detail below with reference to the embodiments.

[0046] The raw materials used in the examples and comparative examples are all commercially available.

[0047] Preparation Example 1-1

[0048] The preparation method of silicon carbide composite material includes the following steps:

[0049] (1) Mix 15kg silicon carbide powder, 5kg alumina powder and 2kg boron nitride, and grind at 520r / min for 2.5h to obtain a mixture;

[0050] (2) Mix the mixture from step (1), nano silicon carbide whiskers, 2 kg sodium alginate and 20 kg deionized water evenly, calcine at 630°C for 1.5 h, and then calcine at 1050°C for 3.5 h to obtain the modified material;

[0051] (3) Disperse the modified phenolic resin in 30 kg of ethanol aqueous solution (ethanol mass fraction is 70%), stir evenly, add it to the modified material in step (2), stir at 68℃ for 1.5 h, dry, and obtain silicon carbide composite material.

[0052] The mass ratio of silicon carbide powder, nano-silicon carbide whiskers, and modified phenolic resin is 1:0.6:0.2.

[0053] The preparation method of modified phenolic resin includes the following steps: 10 kg of grape skins are crushed, filtered, and the filtrate is obtained. The filtrate is dried and then dispersed in 30 L of ethanol solution. 4 kg of phenolic resin, 1 kg of silane coupling agent KH-550 and 2 kg of nano silica are added. The mixture is stirred at 82 °C for 2.5 h, dried, and ground to obtain modified phenolic resin.

[0054] Preparation Examples 1-2

[0055] The difference from preparation example 1-1 is that in step (2), no nano-silicon carbide whiskers are added.

[0056] Preparation Examples 1-3

[0057] The difference from Preparation Example 1-1 is that no modified phenolic resin is added in step (3).

[0058] Preparation Examples 1-4

[0059] The difference from Preparation Example 1-1 is that the mass ratio of silicon carbide powder, nano silicon carbide whiskers and modified phenolic resin is 1:0.7:0.1.

[0060] Preparation Examples 1-5

[0061] The difference from Preparation Example 1-1 is that the mass ratio of silicon carbide powder, nano silicon carbide whiskers and modified phenolic resin is 1:0.1:0.5.

[0062] Preparation Examples 1-6

[0063] The difference from Preparation Example 1-1 is that grape skins are not added in the preparation method of the modified phenolic resin.

[0064] Preparation Examples 1-7

[0065] The difference from Preparation Example 1-1 is that nano-silica is not added in the preparation method of the modified phenolic resin.

[0066] Preparation Example 2-1

[0067] The preparation method of polyethylene composite fiber includes the following steps:

[0068] (1) Mix 20kg polyethylene resin, 5kg diatomaceous earth, 0.5kg bamboo charcoal powder and 1kg hexanediol, melt extrude and spin to obtain polyethylene fiber;

[0069] (2) Crush the wood tailings, then disperse them in 10L of 3% hydrochloric acid, soak for 12 minutes, filter, then disperse them in 35L of deionized water, add chitosan, and stir at 82℃ for 1.5 hours to obtain a mixture.

[0070] (3) The polyethylene fiber from step (1) is immersed in the mixture from step (2) for 5 times, each time for 7 seconds, and dried after each immersion to obtain polyethylene composite fiber.

[0071] The mass ratio of polyethylene resin, wood waste, and chitosan is 1:0.5:0.2.

[0072] Preparation Example 2-2

[0073] The difference from preparation example 2-1 is that in step (2), no wood tailings are added.

[0074] Preparation Examples 2-3

[0075] The difference from preparation example 2-1 is that chitosan is not added in step (2).

[0076] Preparation Examples 2-4

[0077] The difference from Preparation Example 2-1 is that the mass ratio of polyethylene resin, wood residue and chitosan is 1:0.4:0.3.

[0078] Preparation Examples 2-5

[0079] The difference from Preparation Example 2-1 is that the mass ratio of polyethylene resin, wood residue and chitosan is 1:0.8:0.05.

[0080] Example 1: An anti-slip shoe sole material, comprising a sole body, the sole body comprising an anti-slip layer and a rubber layer, the raw material components of the anti-slip layer, by weight, comprising: 55 kg of polyurethane, 20 kg of silicon carbide composite material, 14 kg of polyethylene composite fiber, 8 kg of maleic anhydride grafted polyethylene octene elastomer, 5 kg of silane coupling agent KH-550, 1 kg of antioxidant 1010, and 0.5 kg of lubricant (amide wax).

[0081] The preparation method of the above-mentioned anti-slip shoe sole material includes the following steps:

[0082] Polyurethane, silicon carbide composite material, polyethylene composite fiber, maleic anhydride grafted polyethylene octene co-elastomer, silane coupling agent KH-550, antioxidant 1010 and lubricant are mixed and kneaded at 200℃ for 10 minutes to obtain a rubber compound. The rubber compound is then molded to obtain an anti-slip layer with a thickness of 0.5mm.

[0083] The anti-slip layer and the rubber layer are bonded together with polyurethane adhesive, hot-pressed at 80°C, and dried to obtain the anti-slip sole material; the polyurethane adhesive is Araldite® 2047.

[0084] Preparation method of rubber layer: 10 kg butyl rubber, 7 kg butadiene rubber, 3 kg silica and 1 kg antioxidant RD are mixed at 120℃ for 25 min, then 3 kg vulcanizing agent and 2 kg vulcanization accelerator 6-GR are added, vulcanization is performed for 45 min, and the mixture is shaped to obtain a rubber layer with a thickness of 1 mm.

[0085] The silicon carbide composite material was prepared using Preparation Example 1-1; the polyethylene composite fiber was prepared using Preparation Example 2-1.

[0086] Example 2: An anti-slip shoe sole material, which differs from Example 1 in that the raw material components of the anti-slip layer, by weight, include: 50 kg of polyurethane, 16 kg of silicon carbide composite material, 10 kg of polyethylene composite fiber, 4 kg of maleic anhydride-grafted polyethylene octene elastomer, 3 kg of silane coupling agent KH-550, 2 kg of antioxidant 1010, and 0.8 kg of lubricant (amide wax).

[0087] Example 3: An anti-slip shoe sole material, which differs from Example 1 in that the silicon carbide composite material is prepared using Preparation Examples 1-2.

[0088] Example 4: An anti-slip shoe sole material, which differs from Example 1 in that the silicon carbide composite material is prepared using Preparation Examples 1-3.

[0089] Example 5: An anti-slip shoe sole material, which differs from Example 1 in that the silicon carbide composite material is prepared using Preparation Examples 1-4.

[0090] Example 6: An anti-slip shoe sole material, which differs from Example 1 in that the silicon carbide composite material is prepared using Preparation Examples 1-5.

[0091] Example 7: An anti-slip shoe sole material, which differs from Example 1 in that the silicon carbide composite material is prepared using Preparation Examples 1-6.

[0092] Example 8: An anti-slip shoe sole material, which differs from Example 1 in that the silicon carbide composite material is prepared using Preparation Examples 1-7.

[0093] Example 9: An anti-slip shoe sole material, which differs from Example 1 in that the polyethylene composite fiber is prepared using Preparation Example 2-2.

[0094] Example 10: An anti-slip shoe sole material, which differs from Example 1 in that the polyethylene composite fiber is prepared using Preparation Examples 2-3.

[0095] Example 11: An anti-slip shoe sole material, which differs from Example 1 in that the polyethylene composite fiber is prepared using Preparation Examples 2-4.

[0096] Example 12: An anti-slip shoe sole material, which differs from Example 1 in that the polyethylene composite fiber is prepared using Preparation Examples 2-5.

[0097] Comparative Example 1

[0098] A non-slip shoe sole material, which differs from Example 1 in that it does not contain silicon carbide composite material.

[0099] Comparative Example 2

[0100] A non-slip shoe sole material, which differs from Example 1 in that it does not contain polyethylene composite fibers.

[0101] The performance testing of the anti-slip shoe sole materials prepared in Examples 1-12 and Comparative Examples 1-2 was carried out.

[0102] Tensile strength was tested according to GB / T528-2009 standard, tear strength according to GB / T529-2009 standard, DIN abrasion resistance test according to GB / T9867-1988 standard, and anti-slip performance according to ISO13287-2019 standard. The dynamic friction coefficient of the dry ceramic tile surface was tested in the test scenario. The test results are shown in Table 1.

[0103] Table 1 Test data for the examples and comparative examples

[0104]

[0105] As can be seen from Table 1, the anti-slip shoe sole materials prepared in Examples 1-2 of this application have good mechanical properties, anti-slip properties, and wear resistance. Among them, the tensile strength of Example 1 is 42.6 MPa, the tear strength is 73.2 kN / m, and the DIN abrasion is 65 mm. 3 The coefficient of dynamic friction is 0.89. This indicates that the silicon carbide composite material achieves excellent anti-slip and wear resistance, polyurethane provides basic elasticity and wear resistance, polyethylene composite fibers enhance tear resistance and dimensional stability, and maleic anhydride-grafted polyethylene octene co-elastomer improves compatibility. The synergistic effect of multiple components ensures the excellent flexibility and durability of the sole.

[0106] In Examples 3-4, the preparation methods of silicon carbide composite materials did not include nano-silicon carbide whiskers or modified phenolic resin. In Examples 5-6, the mass ratio of silicon carbide powder, nano-silicon carbide whiskers, and modified phenolic resin was changed. As can be seen from Table 1, the performance test results of tensile strength, tear strength, DIN abrasion, and dynamic friction coefficient of Examples 3-4 were worse than those of Examples 1-2 and Example 5. The above performance results of Example 6 were better than those of Examples 3-4, but worse than those of Examples 1-2 and Example 5. This indicates that the modified phenolic resin coating of silicon carbide powder and nano-silicon carbide whiskers prevents the composite material from falling off during use. The three components work synergistically to improve the hardness and wear resistance of the silicon carbide composite material, making the composite material both wear-resistant and not easily brittle. It will not separate due to friction and bending during the use of the shoe sole, thus improving the durability of the shoe sole.

[0107] In the preparation methods of the modified phenolic resins in Examples 7-8, grape skins and nano-silica were not added respectively. As can be seen from Table 1, the performance test results of tensile strength, tear strength, DIN abrasion, and dynamic friction coefficient of Examples 7-8 are better than those of Example 4, but worse than those of Examples 1-2 and Example 5. This indicates that the hydroxyl groups of polyphenols in grape skin juice can undergo a condensation reaction with the hydroxymethyl groups of phenolic resin. The rigid aromatic rings and intermolecular hydrogen bonds of polyphenols enhance the mechanical strength of the resin. Nano-silica fills the gaps between resin molecules, increases the density and hardness of the system, enhances the interfacial bonding force with the resin, inhibits crack propagation, and improves wear resistance and impact resistance. Finally, a modified phenolic resin with strong adhesion, good toughness, excellent heat resistance, and easy dispersibility is obtained.

[0108] In Examples 9-10, the preparation methods of polyethylene composite fibers did not include tree tailings or chitosan. In Examples 11-12, the mass ratio of polyethylene resin, tree tailings, and chitosan was changed. As can be seen from Table 1, the performance test results of tensile strength, tear strength, DIN abrasion, and dynamic friction coefficient of Examples 9-10 were worse than those of Examples 1-2 and Example 11. The above performance results of Example 12 were better than those of Examples 9-10, but worse than those of Examples 1-2 and Example 11. This indicates that with polyethylene as the structural matrix, tree tailings provide natural functions and rigidity reinforcement, and chitosan acts as an interface bridge, a stable composite structure is formed by polyethylene resin, tree tailings, and chitosan, which improves the stability, antibacterial properties, and wear resistance of polyethylene composite fibers, thereby improving the overall performance of shoe soles.

[0109] Comparative Examples 1 and 2 did not include silicon carbide composite material and polyethylene composite fiber, respectively. As shown in Table 1, compared to Example 1, the tensile strength, tear strength, DIN abrasion, and dynamic friction coefficient of Comparative Examples 1 and 2 were significantly worse. This indicates that the silicon carbide composite material has excellent abrasion resistance, compressive strength, and thermal conductivity, and can form microscopic hard protrusions on the sole surface, significantly enhancing friction with the ground and providing core anti-slip function, while greatly improving the abrasion life of the sole. Polyethylene composite fiber effectively improves the tear strength, impact resistance, and dimensional stability of the material, and can better bond with the polyurethane matrix to form a three-dimensional network structure, enhancing overall mechanical properties, preventing the sole from cracking or excessively deforming during use, and indirectly supporting the stability of the anti-slip structure.

[0110] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A non-slip shoe sole material, comprising a sole body, characterized in that, The sole body includes an anti-slip layer and a rubber layer. The raw material components of the anti-slip layer, by weight, include: 50-55 parts polyurethane, 16-20 parts silicon carbide composite material, 10-14 parts polyethylene composite fiber, 4-8 parts maleic anhydride grafted polyethylene octene elastomer, 3-5 parts silane coupling agent, 1-2 parts antioxidant, and 0.5-0.8 parts lubricant. The preparation method of the silicon carbide composite material includes the following steps: (1) Mix silicon carbide powder, alumina powder and boron nitride, and grind them at 500-550 r / min for 2-3 h to obtain a mixture; (2) Mix the mixture from step (1), nano silicon carbide whiskers, sodium alginate, and deionized water evenly, calcine at 600-650℃ for 1-2 hours, and then calcine at 1000-1100℃ for 3-4 hours to obtain the modified material. (3) Disperse the modified phenolic resin in an ethanol aqueous solution, stir evenly, add it to the modified material in step (2), stir at 65-70℃ for 1-2 hours, dry, and obtain silicon carbide composite material; The preparation method of the modified phenolic resin includes the following steps: crushing grape skins, filtering to obtain filtrate, drying the filtrate, dispersing it in an ethanol solution, adding phenolic resin, silane coupling agent KH-550 and nano silica, stirring at 80-85℃ for 2-3 hours, drying, grinding, and obtaining modified phenolic resin. The method for preparing the polyethylene composite fiber includes the following steps: (1) Mix polyethylene resin, diatomaceous earth, bamboo charcoal powder and hexanediol, melt extrude, and spin to obtain polyethylene fiber; (2) Crush the wood tailings, then disperse them in hydrochloric acid, soak for 10-15 minutes, filter, then disperse them in deionized water, add chitosan, and stir at 80-85℃ for 1-2 hours to obtain a mixture. (3) The polyethylene fiber from step (1) is immersed in the mixture from step (2) for 4-6 times, each time for 5-8 seconds, and dried after each immersion to obtain polyethylene composite fiber.

2. The anti-slip shoe sole material according to claim 1, characterized in that, The mass ratio of silicon carbide powder, nano-silicon carbide whiskers, and modified phenolic resin is 1:0.6-0.7:0.1-0.

2.

3. The anti-slip shoe sole material according to claim 1, characterized in that, The mass ratio of polyethylene resin, wood waste, and chitosan is 1:0.4-0.5:0.2-0.

3.

4. The anti-slip shoe sole material according to claim 1, characterized in that, The rubber layer is prepared by mixing butyl rubber, cis-butadiene rubber, silica, and antioxidant RD at 110-120℃ for 20-30 minutes, then adding vulcanizing agent and vulcanization accelerator 6-GR, and vulcanizing for 40-50 minutes to obtain the rubber layer.

5. The method for preparing an anti-slip shoe sole material according to claim 1, characterized in that, Includes the following steps: Polyurethane, silicon carbide composite material, polyethylene composite fiber, maleic anhydride grafted polyethylene octene co-elastomer, silane coupling agent, antioxidant, and lubricant are mixed and kneaded at 200-210℃ for 10-12 minutes to obtain a rubber compound. The rubber compound is then molded to obtain an anti-slip layer. The anti-slip layer is bonded to the rubber layer, then hot-pressed and dried to obtain the anti-slip shoe sole material.

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