A wear-resistant and slip-resistant shoe sole material and a synthetic method thereof

Abstract

The application relates to a wear-resistant and anti-skid shoe sole material and a synthesis method thereof, and belongs to the shoe sole material field. The wear-resistant and anti-skid shoe sole material is made of components including the following components in parts by weight: ethylene-vinyl acetate copolymer EVA 45-65 parts, butyronitrile rubber 20-35 parts, anti-aging particles 10-23 parts, nano zinc oxide 4-8 parts, nano magnesium oxide 5-8 parts, hollow glass microbeads 2-4 parts and white carbon black 3-6 parts. The anti-aging particles are synthesized, the synthesis of the anti-aging particles uses chlorobutyl rubber as a base material, chlorotriazine DACT and an anti-aging agent are compounded in the chlorobutyl rubber, and a dispersing agent is used to uniformly disperse the chlorotriazine DACT and the anti-aging agent in the chlorobutyl rubber; the chlorobutyl rubber can protect the chlorotriazine DACT and the anti-aging agent, prolong the action time of the chlorotriazine DACT and the anti-aging agent, and thus the anti-aging performance of the shoe sole is improved.

Description

Technical Field

[0001] This application relates to the technical field of shoe sole materials, and more specifically, it relates to a wear-resistant and slip-resistant shoe sole material and a method for synthesizing the same. Background Technology

[0002] As living standards continue to improve, consumers are placing higher demands on the style, comfort, and durability of shoes. There are many types of shoes, and different types have significantly different requirements for the materials used in the soles. For example, athletic shoe soles require high wear resistance, good slip resistance, and good comfort, and sometimes a certain degree of resilience; casual shoe soles require comfort and breathability; and leather shoe soles require softness, comfort, and good breathability. Meeting these different requirements depends on the different material formulas used to make the soles.

[0003] In fact, most types of shoes have basic requirements for the slip resistance and abrasion resistance of the sole. The quality of slip resistance directly affects the safety of the user, especially for the elderly and children, whose balance is relatively poor and whose bodies are more vulnerable. A slip could have disastrous consequences, ranging from minor swelling and bleeding to serious injuries or even death. Abrasion resistance directly affects the consumer's cost of use. Poorly durable soles significantly reduce the lifespan of the shoes and severely weaken their functionality. For example, the soles of studded soccer cleats have small studs; if the sole material has poor abrasion resistance, these studs will wear down quickly, severely impacting the player's experience and significantly reducing the lifespan of the cleats.

[0004] Therefore, how to provide a shoe sole material with good wear resistance and slip resistance, while also being comfortable and safe, is a problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To address the aforementioned problems, this application provides a wear-resistant and slip-resistant shoe sole material and a method for synthesizing the same.

[0006] On the one hand, this application provides a wear-resistant and non-slip shoe sole material, the technical solution of which is as follows:

[0007] A wear-resistant and non-slip shoe sole material, comprising the following components in parts by weight:

[0008] Ethylene-vinyl acetate copolymer (EVA) 45-65 parts, nitrile rubber 20-35 parts, anti-aging granules 10-23 parts, nano zinc oxide 4-8 parts, nano magnesium oxide 5-8 parts, hollow glass microspheres 2-4 parts, and silica 3-6 parts.

[0009] Preferably, the anti-aging granules are made from raw materials comprising the following parts by weight: chloroprene rubber (10-20 parts), dispersant (2-5 parts), chlorotriazine DACT (3-5 parts), and anti-aging agent (3-8 parts).

[0010] Among them, ethylene-vinyl acetate copolymer (EVA) has good toughness, impact resistance, filler compatibility and heat sealing performance, while nitrile rubber has good oil resistance, wear resistance and heat resistance, and strong adhesion. Using EVA and nitrile rubber as the base material for shoe soles can ensure that the soles have good basic comprehensive performance.

[0011] The synthesis of anti-aging particles uses chloroprene rubber as a base material, with chlorotriazine and antioxidants compounded within the chloroprene rubber. A dispersant is used to ensure uniform dispersion of the chlorotriazine and antioxidants within the chloroprene rubber. The chloroprene rubber provides a protective layer for the chlorotriazine and antioxidants, prolonging their action time and thus improving the anti-aging performance of the shoe sole. Notably, chlorotriazine, as an anti-aging additive, effectively enhances the performance of the antioxidant. The resulting antioxidant-anti-aging additive combination results in superior performance of the anti-aging particles and improves the compatibility between the anti-aging particles and the shoe sole components.

[0012] Composite nano-metal oxides have small particle size and high mechanical strength. When dispersed as fillers among the various components of the shoe sole, they help improve the mechanical properties of the sole. In addition, nano-alumina can also act as a binder, enabling multiple nano-metal oxides to bond together better.

[0013] On the other hand, this application provides a method for synthesizing a wear-resistant and anti-slip shoe sole material, the technical solution of which is as follows:

[0014] A method for synthesizing a wear-resistant and slip-resistant shoe sole material includes the following steps:

[0015] Step 1: Mix a certain amount of EVA and nitrile rubber evenly, then heat to a molten state to obtain a molten base material;

[0016] Step 2: Add a certain weight of anti-aging particles, nano zinc oxide, nano magnesium oxide, hollow glass microspheres, and white carbon black to the molten base material obtained in Step 1, stir and mix evenly, and then knead to obtain a kneaded molten mixture.

[0017] Step 3: Add the molten mixture obtained in Step 2 into an injection molding machine for injection molding to obtain a wear-resistant and non-slip shoe sole material.

[0018] Specifically, the mixing temperature in step 2 is 150-170℃, and the mixing time is 1-3 hours.

[0019] The method for synthesizing the anti-aging particles is as follows:

[0020] 1) Heat the neoprene rubber to a molten state;

[0021] 2) Add a certain amount of dispersant, chlorotriazine DACT, and antioxidant to the molten chloroprene rubber in sequence, stir and mix evenly to obtain a molten mixture;

[0022] 3) The molten mixture obtained in step 2) is extruded and granulated to obtain anti-aging granules.

[0023] Preferably, the dispersant is at least one of magnesium stearate, calcium stearate, and zinc stearate.

[0024] Preferably, the antioxidant is antioxidant 4010.

[0025] Preferably, the mass ratio of chloroprene rubber, dispersant, chlorotriazine DACT, and antioxidant is chloroprene rubber, dispersant, chlorotriazine DACT, and antioxidant = (10-20): (2-5): (3-5): (3-8). Beneficial effects

[0026] 1. This invention synthesizes anti-aging particles. The synthesis of these particles uses chloroprene rubber as a base material, incorporating chlorotriazine DACT and an antioxidant within the chloroprene rubber. A dispersant is used to ensure uniform dispersion of the chlorotriazine DACT and antioxidant within the chloroprene rubber. The chloroprene rubber provides protection for the chlorotriazine DACT and antioxidant, prolonging their action time and thus improving the anti-aging performance of the shoe sole. Notably, chlorotriazine, as an anti-aging additive, effectively enhances the performance of the antioxidant. The resulting antioxidant-anti-aging additive combination results in superior performance of the anti-aging particles and improves the compatibility between the anti-aging particles and the shoe sole components.

[0027] 2. Hollow glass microspheres are characterized by light weight, large volume, high compressive strength, low oil absorption, good dispersibility and flowability, and high chemical stability. Selecting an appropriate amount of addition can effectively reduce the material density, improve the tensile strength and flexural modulus of the material, and also significantly reduce the thermal conductivity of the material.

[0028] 3. This invention uses ethylene-vinyl acetate copolymer (EVA) and nitrile rubber as base materials. EVA has good toughness, impact resistance, filler compatibility and heat sealing performance, while nitrile rubber has good oil resistance, wear resistance, heat resistance and strong adhesion. Using EVA and nitrile rubber as the base materials for shoe soles can ensure that the soles have good basic comprehensive performance.

[0029] 4. This application incorporates nano-zinc oxide and nano-magnesium oxide into the raw materials. These nano-metal oxides possess advantages such as small particle size and high mechanical strength. As fillers, they are uniformly dispersed among the various components of the shoe sole, which helps improve the mechanical properties of the sole. Furthermore, these nano-metal oxides can also act as adhesives, enabling better bonding between the various components of the shoe sole and effectively enhancing its overall integrity. Detailed Implementation Example 1

[0030] 1. The synthesis method of anti-aging particles is as follows:

[0031] 1-1. Heat 15 kg of neoprene rubber to a molten state;

[0032] 1-2. Add 3.5 kg of magnesium stearate, 4 kg of chlorotriazine DACT, and 5.5 kg of antioxidant 4010 to the molten chloroprene rubber in sequence, stir and mix evenly to obtain a molten mixture;

[0033] 1-3. The molten mixture obtained in step 2) is extruded and granulated to obtain anti-aging granules.

[0034] 2. A method for synthesizing wear-resistant and non-slip shoe sole materials, comprising the following steps:

[0035] 2-1. Mix 55kg of EVA and 27.5kg of nitrile rubber evenly, then heat to a molten state to obtain a molten base material;

[0036] 2-2. Add 16.5 kg of anti-aging granules, 6 kg of nano zinc oxide, 6.5 kg of nano magnesium oxide, 3 kg of hollow glass microspheres, and 4.5 kg of silica to the molten base material obtained in step 2-1. After stirring and mixing evenly, knead at 160°C for 2 hours to obtain a kneaded molten mixture.

[0037] 2-3. Add the molten mixture obtained in step 2-2 into an injection molding machine for injection molding to obtain a wear-resistant and non-slip shoe sole material. Example 2

[0038] 1. The synthesis method of anti-aging particles is as follows:

[0039] 1-1. Heat 10 kg of neoprene rubber to a molten state;

[0040] 1-2. Add 2 kg of magnesium stearate, 3 kg of chlorotriazine DACT, and 3 kg of antioxidant 4010 to the molten chloroprene rubber in sequence, stir and mix evenly to obtain a molten mixture;

[0041] 1-3. The molten mixture obtained in step 2) is extruded and granulated to obtain anti-aging granules.

[0042] 2. A method for synthesizing wear-resistant and non-slip shoe sole materials, comprising the following steps:

[0043] 2-1. Mix 45kg of EVA and 20kg of nitrile rubber evenly, then heat to a molten state to obtain a molten base material;

[0044] 2-2. Add 10 kg of anti-aging granules, 4 kg of nano zinc oxide, 5 kg of nano magnesium oxide, 2 kg of hollow glass microspheres, and 3 kg of fumed silica to the molten base material obtained in step 2-1. After stirring and mixing evenly, knead at 150°C for 1 hour to obtain a kneaded molten mixture.

[0045] 2-3. Add the molten mixture obtained in step 2-2 into an injection molding machine for injection molding to obtain a wear-resistant and non-slip shoe sole material. Example 3

[0046] 1. The synthesis method of anti-aging particles is as follows:

[0047] 1-1. Heat 20 kg of neoprene rubber to a molten state;

[0048] 1-2. Add 5 kg of magnesium stearate, 5 kg of chlorotriazine DACT, and 8 kg of antioxidant 4010 to the molten chloroprene rubber in sequence, stir and mix evenly to obtain a molten mixture.

[0049] 1-3. The molten mixture obtained in step 2) is extruded and granulated to obtain anti-aging granules.

[0050] 2. A method for synthesizing wear-resistant and non-slip shoe sole materials, comprising the following steps:

[0051] 2-1. Mix 65kg of EVA and 35kg of nitrile rubber evenly, then heat to a molten state to obtain a molten base material;

[0052] 2-2. Add 23 kg of anti-aging granules, 8 kg of nano zinc oxide, 8 kg of nano magnesium oxide, 4 kg of hollow glass microspheres, and 6 kg of fumed silica to the molten base material obtained in step 2-1. After stirring and mixing evenly, knead at 170°C for 3 hours to obtain a kneaded molten mixture.

[0053] 2-3. Add the molten mixture obtained in step 2-2 into an injection molding machine for injection molding to obtain a wear-resistant and non-slip shoe sole material.

[0054] Comparative Example 1

[0055] The synthesis process is the same as in Example 1, except that chlorotriazine DACT is not added during the preparation of the anti-aging particles.

[0056] Comparative Example 2

[0057] The synthesis process is the same as in Example 1, except that 2 kg of chlorotriazine DACT is added during the preparation of the anti-aging granules.

[0058] Comparative Example 3

[0059] The synthesis process is the same as in Example 1, except that 6 kg of chlorotriazine DACT is added during the preparation of the anti-aging granules.

[0060] Comparative Example 4

[0061] The synthesis process is the same as in Example 1, except that the amount of hollow glass microspheres added is 1 kg.

[0062] Comparative Example 5

[0063] The synthesis process is the same as in Example 1, except that the amount of hollow glass microspheres added is 5 kg.

[0064] Performance testing

[0065] Shoe soles obtained in Examples 1-3 and Comparative Examples 1-5 were sampled and subjected to the following performance tests. The results are shown in Table 1.

[0066] (a) Abrasion resistance test.

[0067] The abrasion resistance of shoe soles is tested using GB / T1689-1998. The lower the value, the better the abrasion resistance.

[0068] (ii) Elongation at break test.

[0069] The elongation at break of the sole was tested using GB / T528-2009. The higher the value, the better the tensile performance.

[0070] (III) Anti-aging performance testing

[0071] First, 100g of the wear-resistant and non-slip shoe sole material formulation was injection molded into a 10mm*10mm square plate. After 24 hours, it served as a test sample. The test sample was divided into two parts and placed under natural environment and ultraviolet light conditions, respectively. After 24 months, the samples were weighed, and the anti-aging performance was evaluated by observing the change in sample mass. The anti-aging performance index was calculated using the following formula:

[0072] D = (10 - W) / 10,

[0073] Where: D: Anti-aging performance index (%); W: Mass of the aged cable material (g);

[0074] The smaller the anti-aging performance index, the better the anti-aging performance of the sample.

[0075] The test results are shown in Table 1.

[0076] Table 1

[0077]

[0078] The test results in Table 1 show that:

[0079] 1. As can be seen from Examples 1-3, the abrasion resistance, tensile properties and anti-aging properties of the shoe sole synthesized by the present invention are all excellent. This shows that by formulating according to the composition of the raw materials, a shoe sole with excellent performance can be obtained.

[0080] 2. In Comparative Example 1, without the anti-aging additive DACT, the anti-aging performance index was significantly worse. This demonstrates that the anti-aging additive DACT has a significant impact on the anti-aging performance of the shoe sole. It is worth noting that the absence of DACT not only affects the anti-aging performance of the shoe sole, but also reduces its abrasion resistance and tensile properties to some extent. Therefore, the anti-aging additive DACT affects not only the anti-aging performance of the shoe sole, but also its abrasion resistance and tensile properties.

[0081] 3. Comparative Example 2 included the anti-aging additive chlorotriazine DACT, but the content of chlorotriazine DACT was lower than the range specified in this application, meaning the content of chlorotriazine DACT was too low, exceeding the lower limit set by this application. The test results show that the anti-aging performance of Comparative Example 2 was significantly lower than that of Example 1. Even compared to Comparative Example 1, the decrease in anti-aging performance of Comparative Example 2 was still very significant, indicating that when the content of chlorotriazine DACT is lower than the range specified in this application, its anti-aging additive effect is no longer present, and it even has a negative effect on the performance of the anti-aging agent, resulting in worse anti-aging performance than when chlorotriazine DACT was not added.

[0082] Similarly, Comparative Example 3 included the anti-aging additive chlorotriazine DACT, but the content of chlorotriazine DACT exceeded the range specified in this application, meaning the content of chlorotriazine DACT was too high, exceeding the upper limit set by this application. The test results show that the anti-aging performance of Comparative Example 3 was significantly lower than that of Example 1. Even compared to Comparative Example 1, the decrease in anti-aging performance of Comparative Example 3 was still very significant, indicating that when the content of chlorotriazine DACT exceeded the range specified in this application, its anti-aging additive effect was no longer present, and it even had a "negative" effect on the performance of the anti-aging agent, resulting in worse anti-aging performance than when chlorotriazine DACT was not added.

[0083] As can be seen from Comparative Examples 2-3, the anti-aging additive DACT (chlorotriazine) is indispensable for achieving good anti-aging effects. At the same time, its content is crucial for its effectiveness as an anti-aging additive. Its content needs to be maintained within the range set in this application. Exceeding this range will significantly reduce the anti-aging performance of the shoe sole.

[0084] This specific embodiment is merely an explanation of the present invention and not a limitation thereof. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An abrasion resistant, slip resistant shoe sole material characterized by, Synthesized by including the following components by weight parts: Ethylene-vinyl acetate copolymer EVA 45-65 parts, nitrile rubber 20-35 parts, anti-aging particles 10-23 parts, nano zinc oxide 4-8 parts, nano magnesium oxide 5-8 parts, hollow glass microbeads 2-4 parts, white carbon black 3-6 parts; The anti-aging particles are made of raw materials including: chlorobutyl rubber, dispersant, chlorinated triazine DACT, antioxidant; The mass ratio of chlorobutyl rubber, dispersant, chlorinated triazine DACT, antioxidant is chlorobutyl rubber, dispersant, chlorinated triazine DACT, antioxidant = (10-20): (2-5): (3-5): (3-8).

2. The slip-resistant shoe sole material of claim 1, wherein The dispersant is at least one of magnesium stearate, calcium stearate, and zinc stearate.

3. The slip-resistant shoe sole material of claim 1, wherein The antioxidant is antioxidant 4010.

4. A process for the synthesis of the wear-resistant, slip-resistant shoe sole material according to any one of claims 1 to 3, characterized in that Comprising the following steps: Step 1, a certain weight part of EVA, nitrile rubber is stirred and mixed uniformly, heated to a molten state, and a base material in a molten state is obtained; Step 2, a certain weight part of anti-aging particles, nano zinc oxide, nano magnesium oxide, hollow glass microbeads, and white carbon black is added to the molten base material obtained in step 1, stirred and mixed uniformly, and then mixed to obtain a mixed molten state mixture; Step 3, the mixed molten state mixture obtained in step 2 is added to an injection molding machine for injection molding to obtain a wear-resistant and anti-slip shoe sole material.

5. The method of synthesis of claim 4, wherein, The synthesis method of the anti-aging particles is as follows: 1) Heat the chlorobutyl rubber to a molten state; 2) Add a certain amount of dispersant, chlorinated triazine DACT, and antioxidant to the molten chlorobutyl rubber in sequence, stir and mix uniformly to obtain a molten mixture; 3) The molten mixture obtained in step 2) is extruded and granulated to obtain anti-aging particles.

6. The method of synthesis of claim 5, wherein, The mass ratio of chlorobutyl rubber, dispersant, chlorinated triazine DACT, and antioxidant is chlorobutyl rubber, dispersant, chlorinated triazine DACT, and antioxidant = (10-20): (2-5): (3-5): (3-8).

7. The method of synthesis of claim 6, wherein, The mixing temperature of step 2 is 150-170°C, and the mixing time is 1-3h.

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