Ultra-light weather-resistant vulcanized sole material and preparation method thereof

Abstract

The invention belongs to the technical field of shoe soles, and provides an ultra-light weather-resistant vulcanized shoe sole material and a preparation method thereof.The ultra-light weather-resistant vulcanized shoe sole material is prepared from, by weight, 55-70 parts of hydrogenated styrene-butadiene block copolymer, 10-20 parts of a vulcanizing agent, 1-3 parts of a vulcanizing agent, 1-3 parts of a vulcanizing agent and 1-3 parts of a vulcanizing agent through banburying and granulation. 10 to 20 parts of ethylene-methacrylate; 2-10 parts of ethylene propylene diene monomer; 10 to 20 parts of polyolefin elastomer; 0.1 to 1 part of stearic acid; 0.1 to 0.5 part of zinc stearate; 0.5-1 part of a flowable agent; 0.5-1 part of a vulcanizing agent; according to the ultra-light sole, the overall weight of the sole is reduced by adjusting the formula and the process, the ultra-light effect is achieved, the weather resistance of the sole is guaranteed, and therefore the wearing experience of shoes made of the sole is improved.

Description

Technical Field

[0001] The present application relates to the field of sole technology, and in particular to an ultra-light weather-resistant vulcanized sole material and a preparation method thereof. Background Art

[0002] Sports shoes are designed and manufactured based on the characteristics of people participating in sports or traveling. They are used to help wearers improve exercise comfort and athletic performance. However, the rubber layer of the soles of traditional sports shoes is usually thicker. Although this can provide better cushioning effects to a certain extent, it also directly leads to a significant increase in the weight of the soles, resulting in more physical energy consumption during exercise, which may affect athletic performance and results. In addition, they are prone to aging, resulting in reduced elasticity and toughness, thereby reducing the overall wearing experience of the sports shoes. Summary of the invention

[0003] The purpose of the present invention is to provide an ultra-light weather-resistant vulcanized sole material and a preparation method thereof in order to solve the above-mentioned problems.

[0004] The technical solution of this application is implemented as follows: On the one hand, the present application provides an ultra-light weather-resistant vulcanized sole material and a preparation method thereof, comprising the following raw materials in parts by weight: 55-70 parts of hydrogenated styrene-butadiene block copolymer; 10-20 parts of ethylene-methacrylate; 2-10 parts of ethylene propylene rubber; 10-20 parts of polyolefin elastomer; 0.1-1 parts of stearic acid; 0.1-0.5 parts of zinc stearate; 0.5-1 parts of flow agent; 0.5-1 parts of vulcanizing agent; 0.5-1 parts of silane coupling agent; The flowable agent is a mixture of a polymer carrier made of ethylene-vinyl acetate copolymer or low-density polyethylene and a fatty acid made of stearic acid or zinc stearate; The curing agent is di-tert-butyl peroxyisopropylbenzene.

[0005] In one embodiment, the silane coupling agent is vinyl tris(III).

[0006] In one embodiment, the ultra-light weather-resistant vulcanized sole material includes the following raw materials in parts by weight: 65 parts of hydrogenated styrene-butadiene block copolymer; 15 parts of ethylene methacrylate; 5 parts of EPDM rubber; 15 parts of polyolefin elastomer; 0.5-0.8 parts of stearic acid; 0.3-0.5 parts of zinc stearate; 0.5-0.8 parts of flow agent; 0.7-0.9 parts of vulcanizing agent; and 0.6-0.8 parts of silane coupling agent.

[0007] On the other hand, the present application provides a method for preparing an ultra-light weather-resistant vulcanized sole, wherein hydrogenated styrene-butadiene block copolymer and ethylene propylene diene monomer rubber constitute a rubber main material group, ethylene-methacrylate and polyolefin elastomer constitute a functional additive group, and stearic acid, zinc stearate and a flow agent constitute a processing aid group; The preparation method comprises the following steps: S1: pre-treating the rubber main material group and the functional additive group; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: turning the materials evenly from different positions of the internal mixer according to the temperature and time interval to obtain a mixture; S4: extruding the mixture through a granulator and granulating it to form plastic granules; S5: The plastic pellets are heated and injected into a mold to form a sole.

[0008] In one embodiment, ethylene-methacrylate and polyolefin elastomer are placed in a drying oven, the drying temperature is set to 50-70° C., the vacuum degree is set to 0.08-0.09 MPa, and the drying time is set to 4-8 hours; The EPDM rubber is initially crushed.

[0009] In one embodiment, when the main rubber is being mixed, the internal mixer is set to an initial temperature of 50-60°C, a rotation speed of 30-40rpm, and a mixing time of 3-5min; When the functional additive group is added, the temperature of the internal mixer is adjusted to 70-80°C, the speed is increased to 40-50rpm, and the mixing time is 5-8min; When the processing aid group is added, the temperature of the internal mixer is adjusted to 80-90°C, the speed is maintained at 40-50rpm, the mixing time is 3-5min, and the material is turned over; When adding the vulcanizing agent, the temperature of the internal mixer is adjusted to 90 - 100 °C, the speed is reduced to 20 - 30 rpm, the mixing time is 2 - 3 min, and the material is turned over again; When the silane coupling agent is added at the end, the temperature of the internal mixer is adjusted to 100 - 110 °C, the speed is 20 - 30 rpm, the mixing time is 1 - 2 min, and the material is turned over again until the temperature reaches 115 °C.

[0010] In one embodiment, when the mixture is in the granulator, the electric heating temperature of the granulator is adjusted to 85-90°C; The die head electric heating temperature 1 - 2 is adjusted to 75 - 80℃; The main engine motor speed is adjusted to 22 - 25.

[0011] In one embodiment, the injection operation is performed under the conditions that the temperature in the mold reaches 173±2° C. and the vulcanization time is set to 330±10 seconds.

[0012] In one embodiment, before the mold is subjected to the injection molding operation, a water-based release agent is sprayed into the mold; When using, the water-based release agent should be mixed with water in a ratio of 1:40.

[0013] The advantages or beneficial effects of the above technical solution include at least: The present application discloses an ultra-light weather-resistant vulcanized sole material and a preparation method thereof. The weight of the sole is reduced by using hydrogenated styrene-butadiene block copolymer as the main material and the proportion thereof, and the weather resistance of the sole is improved by adding and mixing ethylene propylene diene monomer rubber, and the overall anti-aging and cracking performance is improved. At the same time, by specifying in detail the specific parameters of a series of processing processes from mixing, granulation to injection, the quality difference caused by fluctuations in processing parameters is reduced, the consistency and reliability of product quality are ensured, and the overall performance of the sole is improved. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0015] The names of the messages or information exchanged between multiple devices in the embodiments of the present application are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0016] An ultra-light weather-resistant vulcanized sole material comprises the following raw materials in parts by weight: 55-70 parts of hydrogenated styrene-butadiene block copolymer; 10-20 parts of ethylene-methacrylate; 2-10 parts of EPDM rubber; 10-20 parts of polyolefin elastomer; 0.1-1 parts of stearic acid; 0.1-0.5 parts of zinc stearate; 0.5-1 parts of flow agent; 0.5-1 parts of vulcanizing agent; and 0.5-1 parts of silane coupling agent. The flow agent is a mixture of a polymer carrier made of ethylene-vinyl acetate copolymer or low-density polyethylene and a fatty acid made of stearic acid or zinc stearate. In the flow agent, the polymer carrier accounts for 70%-90%, and the fatty acid accounts for 10%-30% as a matrix to carry the active ingredient, thereby ensuring effective dispersion and avoiding precipitation during processing, which can effectively enhance the fluidity of the formula bulk material and facilitate injection molding; The vulcanizing agent is di-tert-butyl peroxyisopropylbenzene. During the vulcanization process, it decomposes to produce free radicals, which trigger the cross-linking reaction between the rubber molecular chains, so that the rubber forms a three-dimensional network structure, which helps to improve the physical properties of the rubber, such as strength, hardness and elasticity. The vulcanization process can be completed in a relatively short time, improving production efficiency. The silane coupling agent is vinyl tris, which enhances the dispersion and stability of the filler in the rubber matrix, so that the filler can better play its reinforcing and modifying role. The hydrogenated styrene-butadiene block copolymer is the newly developed selective hydrogenated SEBS material by Lee Chang-jung Company. The degree of hydrogenation is 80%. It has the functions of anti-aging, wear-resistance, anti-slip, high elasticity, and good adhesion to the sole, EVA midsole and upper. EPDM rubber has excellent weather resistance, aging resistance, crack resistance, and wear resistance, which can improve the resilience, wear resistance, and UV resistance of the formula; Ethylene-methacrylate has high permeability, rigidity, and fluidity. Due to its strong polarity, it can improve the polarity generated by adding EPDM rubber to the formula and enhance adhesion; In the above ratio, hydrogenated styrene-butadiene block copolymer is used as the main component, which has a relatively low density. Under the premise of ensuring the necessary physical properties of the sole, it can effectively reduce the weight of the sole. Its molecular structure has been hydrogenated, which optimizes the performance of the material to a certain extent, so that while meeting the functional requirements, it will not increase too much weight burden. In addition, polyolefin materials usually have a lower density, which helps to maintain the sole within a lower specific gravity range, thereby achieving an ultra-light effect. The ultra-light effect of the sole is achieved by combining hydrogenated styrene-butadiene block copolymer and polyolefin elastomer. At the same time, EPDM rubber has excellent weather resistance and aging crack resistance, and the synergistic effect of silane coupling agent can enhance the interfacial bonding between rubber and other materials, improve the stability of the material system, thereby improving the weather resistance of the sole and solving the problem of reduced elasticity and toughness due to aging of the sole.

[0017] In one embodiment, the ultra-light weather-resistant vulcanized sole material includes the following raw materials in parts by weight: 65 parts of hydrogenated styrene-butadiene block copolymer; 15 parts of ethylene-methacrylate; 5 parts of ethylene propylene rubber; 15 parts of polyolefin elastomer; 0.5-0.8 parts of stearic acid; 0.3-0.5 parts of zinc stearate; 0.5-0.8 parts of flow agent; 0.7-0.9 parts of vulcanizing agent; 0.6-0.8 parts of silane coupling agent. The hydrogenated styrene-butadiene block copolymer, as a core component, provides excellent elasticity and wear resistance, effectively buffers sports impact, and ensures that the sole is not easily worn after long-term use. The addition of a small amount of ethylene propylene rubber plays a key weather-resistant role and significantly improves the weather resistance and aging cracking resistance of the sole. Stearic acid and zinc stearate are processing aids to soften the material and can be adjusted according to the ratio. The vulcanizing agent triggers a cross-linking reaction to construct a three-dimensional network structure, which comprehensively improves the physical properties of the sole.

[0018] The present application embodiment provides a method for preparing the ultra-light weather-resistant vulcanized sole material as described above, comprising the following steps: hydrogenated styrene-butadiene block copolymer and ethylene propylene diene monomer rubber constitute a rubber main material group, ethylene-methacrylate and polyolefin elastomer constitute a functional additive group, and stearic acid, zinc stearate and a flow agent constitute a processing aid group; The preparation method comprises the following steps: S1: pre-treating the rubber main material group and the functional additive group, placing ethylene-methacrylate and polyolefin elastomer in a drying oven, setting the drying temperature to 50-70°C, the vacuum degree to 0.08-0.09MPa, and the drying time to 4-8 hours; The EPDM rubber is initially crushed; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: The materials are evenly turned over from different positions of the internal mixer according to the temperature and time interval to obtain a mixture. When the main rubber is mixed, the internal mixer is set to an initial temperature of 50-60°C, a rotation speed of 30-40rpm, and a mixing time of 3-5min; When the functional additive group is added, the temperature of the internal mixer is adjusted to 70-80°C, the speed is increased to 40-50rpm, and the mixing time is 5-8min; When the processing aid group is added, the temperature of the internal mixer is adjusted to 80-90°C, the speed is maintained at 40-50rpm, the mixing time is 3-5min, and the material is turned over; When adding the vulcanizing agent, the temperature of the internal mixer is adjusted to 90 - 100 °C, the speed is reduced to 20 - 30 rpm, the mixing time is 2 - 3 min, and the material is turned over again; When adding the silane coupling agent at the end, adjust the mixer temperature to 100 - 110°C, the speed to 20 - 30rpm, the mixing time to 1 - 2min, and turn the material over again until the temperature reaches 115°C. S4: Extruding the mixture through a granulator and granulating it to form plastic granules. When the mixture is in the granulator, the electric heating temperature of the granulator is adjusted to 85-90°C; The die head electric heating temperature 1 - 2 is adjusted to 75 - 80℃, and the main engine motor speed is adjusted to 22 - 25 to obtain better plasticization and extrusion effects and ensure that the pellet length and shape are uniform; S5: heating the plastic particles and injecting them into the mold to form the sole. When the temperature in the mold reaches 173±2°C and the curing time is set to 330±10 seconds, the injection operation is performed. Before the injection operation is performed on the mold, a water-based release agent is sprayed into the mold. The spraying of the water-based release agent makes it easier to inject the mold and form the sole. The sole can be easily removed from the mold to complete demoulding. When using, the water-based release agent should be mixed with water in a ratio of 1:40.

[0019] Pretreatment operations can avoid uneven particle size or agglomeration of the rubber main material. Therefore, crushing the rubber main material by crushing it facilitates the internal mixing operation. Drying the functional additive group can remove moisture to ensure the effectiveness of the additives in the formula and the expected performance improvement of the sole. A standardized turning operation process is formulated, and the time interval and turning method of turning are clearly defined. During each turning, the operator uses a special turning shovel to evenly turn the material from different positions such as the bottom, top, edge and center of the internal mixer to ensure that the material is fully mixed in the internal mixer to avoid local overheating or material accumulation.

[0020] The embodiment of the present invention has no special restrictions on the preparation process; various data of the prepared product can meet the national physical property standards, and it is an ultra-light weather-resistant vulcanized sole material.

[0021] In order to better understand the technical content of the present invention, specific embodiments are provided below to further illustrate the present invention. In the present invention, unless otherwise stated, the amounts involved in the present invention are all mass percentages.

[0022] Example 1 65 parts of hydrogenated styrene-butadiene block copolymer; 15 parts of ethylene methacrylate; 5 parts of EPDM rubber; 15 parts of polyolefin elastomer; 0.6 parts of stearic acid; 0.5 parts of zinc stearate; 0.6 parts of flow agent; 0.8 parts of vulcanizing agent; 0.7 parts of silane coupling agent; The vulcanizing agent is di-tert-butyl peroxyisopropylbenzene, and the silane coupling agent is vinyl tris(III).

[0023] The preparation method thereof comprises the following steps: S1: pre-treating the rubber main material group and the functional additive group; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: turning the materials evenly from different positions of the internal mixer according to the temperature and time interval to obtain a mixture; S4: extruding the mixture through a granulator and granulating it to form plastic granules; S5: The plastic pellets are heated and injected into a mold to form a sole.

[0024] Example 2 65 parts of hydrogenated styrene-butadiene block copolymer; 15 parts of ethylene methacrylate; 5 parts of EPDM rubber; 15 parts of polyolefin elastomer; 0.8 parts of stearic acid; 0.5 parts of zinc stearate; 0.8 parts of flow agent; 0.9 parts of vulcanizing agent; 0.8 parts of silane coupling agent; Among them, the curing agent is di-tert-butyl peroxy isopropylbenzene, and the silane coupling agent is vinyl tris(III); The preparation method thereof comprises the following steps: S1: pre-treating the rubber main material group and the functional additive group; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: turning the materials evenly from different positions of the internal mixer according to the temperature and time interval to obtain a mixture; S4: extruding the mixture through a granulator and granulating it to form plastic granules; S5: The plastic pellets are heated and injected into a mold to form a sole.

[0025] Comparative Example 1 Styrene-butadiene rubber 65 parts; ethylene-methacrylate 15 parts; EPDM rubber 5 parts; polyolefin elastomer 15 parts; stearic acid 0.6 parts; zinc stearate 0.5 parts; flow agent 0.6 parts; vulcanizing agent 0.8 parts; silane coupling agent 0.7 parts; The vulcanizing agent is di-tert-butyl peroxyisopropylbenzene, and the silane coupling agent is vinyl tris(III).

[0026] The preparation method thereof comprises the following steps: S1: pre-treating the rubber main material group and the functional additive group; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: turning the materials evenly from different positions of the internal mixer according to the temperature and time interval to obtain a mixture; S4: extruding the mixture through a granulator and granulating it to form plastic granules; S5: heating the plastic pellets and injecting them into the mold to form the sole; The difference between this comparative example 1 and example 1 is that the hydrogenated styrene-butadiene block copolymer is replaced with styrene-butadiene rubber, and its weight portion and other proportions remain unchanged.

[0027] Comparative Example 2 65 parts of hydrogenated styrene-butadiene block copolymer; 15 parts of ethylene methacrylate; 5 parts of EPDM rubber; 15 parts of polyolefin elastomer; 0.6 parts of stearic acid; 0.5 parts of zinc stearate; 0.6 parts of flow agent; 0.8 parts of vulcanizing agent; 0.7 parts of silane coupling agent; Among them, the vulcanizing agent is sulfur and the silane coupling agent is vinyl tris(III).

[0028] The preparation method thereof comprises the following steps: S1: pre-treating the rubber main material group and the functional additive group; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: turning the materials evenly from different positions of the internal mixer according to the temperature and time interval to obtain a mixture; S4: extruding the mixture through a granulator and granulating it to form plastic granules; S5: The plastic pellets are heated and injected into a mold to form a sole.

[0029] The difference between this comparative example 2 and example 1 is that the vulcanizing agent is replaced with a vulcanizing agent, and its weight portion remains unchanged and the other proportions remain unchanged.

[0030] Comparative Example 3 65 parts of hydrogenated styrene-butadiene block copolymer; 15 parts of ethylene methacrylate; 5 parts of EPDM rubber; 15 parts of polyolefin elastomer; 0.8 parts of stearic acid; 0.5 parts of zinc stearate; 0.8 parts of flow agent; 0.9 parts of vulcanizing agent; 0.8 parts of silane coupling agent; Among them, the vulcanizing agent is sulfur, and the silane coupling agent is vinyl tris; The preparation method thereof comprises the following steps: S1: pre-treating the rubber main material group and the functional additive group; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: turning the materials evenly from different positions of the internal mixer according to the temperature and time interval to obtain a mixture; S4: extruding the mixture through a granulator and granulating it to form plastic granules; S5: The plastic pellets are heated and injected into a mold to form a sole.

[0031] The difference between this comparative example 3 and example 2 is that the vulcanizing agent is replaced with a vulcanizing agent, and its weight portion remains unchanged and the other proportions remain unchanged.

[0032] The sole samples prepared in Examples 1-2 and Comparative Examples 1-3 were respectively taken to carry out physical property tests of hardness, wear resistance, yellowing resistance and aging resistance. The test results are shown in Table 1.

[0033] The hardness test adopts the Shore A hardness test method to measure the hardness value 5 times at different positions of the sample at least 6 mm apart, and take the average value; The wear resistance test is conducted according to GB / T 3903.2-2008 standard; The yellowing resistance test adopts HG T 3689-2014 footwear yellowing resistance test method, and the temperature is set at 50℃; The aging resistance test was conducted according to GB / T 3512-2014 standard, with the oven temperature set at 70°C and the time set at 72h; Table 1: Physical property test results of Examples 1-2 and Comparative Examples 1-3 of the present invention: The above shows and describes the basic principles and main features of the invention and the advantages of the invention. Those skilled in the art should understand that the invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the invention. Without departing from the spirit and scope of the invention, the invention may have various changes and improvements, which are all within the scope of the invention to be protected. The scope of protection of the invention is determined by the attached claims and.

Claims

1. An ultra-light weather-resistant vulcanized sole material, characterized in that: The invention comprises the following raw materials in parts by weight: 55-70 parts of hydrogenated styrene-butadiene block copolymer; 10-20 parts of ethylene-methacrylate; 2-10 parts of EPDM rubber; 10-20 parts of polyolefin elastomer; 0.1-1 parts of stearic acid; 0.1-0.5 parts of zinc stearate; 0.5-1 parts of flow agent; 0.5-1 parts of vulcanizing agent; 0.5-1 parts of silane coupling agent; The flowable agent is a mixture of a polymer carrier made of ethylene-vinyl acetate copolymer or low-density polyethylene and a fatty acid made of stearic acid or zinc stearate; The vulcanizing agent is di-tert-butyl peroxyisopropylbenzene.

2. The ultra-light weather-resistant vulcanized sole material according to claim 1, characterized in that: The silane coupling agent is vinyl tris(III).

3. The ultra-light weather-resistant vulcanized sole material according to claim 1, characterized in that: The ultra-light weather-resistant vulcanized sole material comprises the following raw materials in parts by weight: 65 parts of hydrogenated styrene-butadiene block copolymer; 15 parts of ethylene-methacrylate; 5 parts of EPDM rubber; 15 parts of polyolefin elastomer; 0.5-0.8 parts of stearic acid; 0.3-0.5 parts of zinc stearate; 0.5-0.8 parts of flow agent; 0.7-0.9 parts of vulcanizing agent; Silane coupling agent 0.6~0.8 parts.

4. A method for preparing an ultra-light weather-resistant vulcanized sole, characterized in that: An ultralight weather-resistant vulcanized sole material comprising any one of claims 1 to 3; The hydrogenated styrene-butadiene block copolymer and the EPDM rubber constitute a rubber main material group, the ethylene-methacrylate and the polyolefin elastomer constitute a functional additive group, and the stearic acid, the zinc stearate and the flow agent constitute a processing aid group; The preparation method comprises the following steps: S1: pretreating the rubber main material group and the functional additive group; S2: putting the rubber main material group into an internal mixer for main rubber mixing, and adding the functional additive group, processing aid group, vulcanizing agent and silane coupling agent in sequence during the internal mixing process according to the temperature of the sealing machine and the internal mixing time; S3: turning the materials evenly from different positions of the internal mixer according to the temperature and time interval to obtain a mixture; S4: extruding the mixture through a granulator and granulating it to form plastic granules; S5: heating the plastic particles and injecting them into a mold to form a shoe sole.

5. The method for preparing the ultra-light weather-resistant vulcanized sole according to claim 4, characterized in that: Placing the ethylene-methacrylate and the polyolefin elastomer in a drying oven, setting the drying temperature to 50-70° C., the vacuum degree to 0.08-0.09 MPa, and the drying time to 4-8 hours; The EPDM rubber is preliminarily crushed.

6. The method for preparing the ultra-light weather-resistant vulcanized sole according to claim 4, characterized in that: When the main rubber is being mixed, the internal mixer is set to have an initial temperature of 50-60°C, a rotation speed of 30-40rpm, and a mixing time of 3-5min; When the functional additive group is added, the temperature of the internal mixer is adjusted to 70-80°C, the speed is increased to 40-50rpm, and the mixing time is 5-8min; When the processing aid group is added, the temperature of the internal mixer is adjusted to 80-90°C, the speed is maintained at 40-50rpm, the mixing time is 3-5min, and the material is turned over; When the vulcanizing agent is added, the temperature of the internal mixer is adjusted to 90-100°C, the speed is reduced to 20-30rpm, the mixing time is 2-3min, and the material is turned over again; When the silane coupling agent is finally added, the temperature of the internal mixer is adjusted to 100-110°C, the rotation speed is 20-30rpm, the mixing time is 1-2min, and the material is turned over again until the temperature reaches 115°C.

7. The method for preparing the ultra-light weather-resistant vulcanized sole according to claim 4, characterized in that: When the mixture is in the granulator, the electric heating temperature of the granulator is adjusted to 85-90°C; The die head electric heating temperature 1 - 2 is adjusted to 75 - 80℃; The main engine motor speed is adjusted to 22 - 25.

8. The method for preparing the ultra-light weather-resistant vulcanized sole according to claim 4, characterized in that: The injection operation was performed under the conditions that the temperature in the mold reached 173±2° C. and the vulcanization time was set to 330±10 seconds.

9. The method for preparing the ultra-light weather-resistant vulcanized sole according to claim 8, characterized in that: Before the mold is subjected to the injection operation, a water-based release agent is sprayed into the mold; The aqueous release agent is mixed with water in a ratio of 1:40 when used.

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