Environment-friendly truck and passenger car tire composed of multiple sustainable materials

Abstract

The invention discloses an environment-friendly truck and passenger car tire comprising various sustainable materials. The environment-friendly truck and passenger car tire comprises a tread layer, an inner surface layer and a skeleton structure, the raw materials of the tread layer comprise natural rubber, regenerated natural rubber, carbon black and bio-based white carbon black; the inner surface layer is prepared from the following raw materials: brominated butyl rubber, butyl regenerated rubber, carbon black and regenerated modified carbon black; the framework structure comprises a tire body layer, a belted layer and a tire bead, and the tire body layer, the belted layer and the tire bead are respectively made of regenerated steel wires. On the premise that the tire performance is maintained, the proportion of the sustainable material in the environment-friendly tire is increased, the sustainable material is effectively utilized, and the environment-friendly truck and passenger car tire which is high in performance and capable of being recycled is manufactured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tires, and particularly relates to an environmentally friendly truck tire composed of multiple sustainable materials. BACKGROUND

[0002] With the increasing emphasis on environmental protection and sustainable development worldwide, the tire industry is facing the severe challenge and urgent need to reduce carbon emissions. In this context, developing a technology route that replaces traditional materials with sustainable materials has become an inevitable trend for industry transformation.

[0003] Currently, the material composition of traditional truck tires relies heavily on non-renewable petroleum-based resources. Specifically, a large amount of synthetic rubber such as styrene-butadiene rubber and butadiene rubber is used in the tread rubber; carbon black is mainly used in the reinforcing system; the skeleton material is nylon or steel wire; and petroleum-derived products are also used as operating aids such as plasticizers and resins. These materials have high energy consumption and large hidden carbon emissions from the entire process of raw material acquisition to processing and molding, which fundamentally determines that traditional tire products have a high carbon footprint and do not meet the green and low-carbon direction of industrial development.

[0004] To address this issue, exploring the use of recycled materials and other sustainable materials in tire manufacturing has become one of the important research and development directions in the industry. However, existing technical solutions that use sustainable materials often have two common defects: 1. Performance sacrifice: Many solutions adopt a simple material replacement strategy, which disrupts the performance balance of the formula system, resulting in significant declines in key performance indicators such as tire wear resistance and fatigue life, making it difficult to meet the demanding requirements of truck use under heavy loads, long distances, and complex road conditions; 2. Low sustainable material proportion: Due to the above performance constraints and limitations of technical breakthroughs, the mass proportion of sustainable materials in existing environmentally friendly tires is generally low, making it difficult to meet the increasingly stringent environmental regulations and market expectations for truly green products.

[0005] Therefore, how to increase the use of sustainable materials while ensuring that the overall performance of the tire is not inferior to that of traditional products remains a core technical bottleneck. SUMMARY

[0006] The present application provides an environmentally friendly truck tire composed of multiple sustainable materials to address the deficiencies in the prior art.

[0007] To achieve the above purpose, the technical solution of the present application is as follows: An environmentally friendly truck tire composed of multiple sustainable materials includes a tread layer, an inner surface layer, and a skeleton structure, wherein, The raw materials of the tread layer include natural rubber, reclaimed natural rubber, carbon black and bio-based white carbon black, and the weight ratio of natural rubber, reclaimed natural rubber, carbon black and bio-based white carbon black is (5-8):(2-5):(3-5):(1-3); The raw materials of the inner surface layer include brominated butyl rubber, butyl reclaimed rubber, carbon black and reclaimed modified carbon black, and the weight ratio of brominated butyl rubber, butyl reclaimed rubber, carbon black and reclaimed modified carbon black is (6-10):(2-6):(3-4):(1-2); The skeleton structure includes a carcass layer, a belt layer and a lip, and the carcass layer, the belt layer and the lip respectively use reclaimed steel wires; the breaking strength of the reclaimed steel cord used by the carcass layer is not less than 1775N, the rigidity is not less than 306 N*mm², and the proportion of reclaimed steel is not less than 50%; the breaking strength of the reclaimed steel cord used by the belt layer is not less than 1820N, the rigidity is not less than 930 N*mm², and the proportion of reclaimed steel is not less than 50%; the breaking strength of the reclaimed steel used by the lip is not less than 4120N, the rigidity is not less than 64307 N*mm², and the proportion of reclaimed steel is not less than 70%.

[0008] Optionally, in the environmentally friendly bus tire composed of a plurality of sustainable materials, the total mass of natural rubber, reclaimed natural rubber, bio-based white carbon black, butyl reclaimed rubber, reclaimed modified carbon black and reclaimed steel wire accounts for 30%-70% of the total mass of tire materials.

[0009] Optionally, the structure of the reclaimed steel cord used by the carcass layer is 0.22+6+12×0.20HT, the structure of the reclaimed steel cord used by the belt layer is 3×0.20+6×0.35HT, and the structure of the reclaimed steel used by the lip is 1.60mmHT.

[0010] Optionally, the tread layer is prepared from the following components by weight: 50-80 parts of natural rubber, 20-50 parts of reclaimed natural rubber, 30-50 parts of carbon black, 10-30 parts of bio-based white carbon black, 2-5 parts of antioxidant, 1-5 parts of stearic acid, 2-5 parts of zinc oxide, 1-3 parts of vulcanizing agent, 1-3 parts of accelerator, 1-5 parts of dispersing agent, 1-5 parts of coupling agent, 0.1-0.5 parts of anti-scorching agent and 0.5-2 parts of microcrystalline wax.

[0011] Optionally, the rubber mixing process of the tread layer includes: First stage: natural rubber, reclaimed natural rubber, part of carbon black, part of bio-based white carbon black are added for rough mixing, the rotor speed is controlled at 30-50 rpm, and the mixing temperature is controlled at 140-160℃; Second stage: add the remaining carbon black, the remaining bio-based white carbon black, stearic acid, microcrystalline wax, zinc oxide, antioxidant and dispersant, the rotor speed control 30~50 rpm, the mixing temperature control 140-150℃; Third stage: add coupling agent, mixing temperature control 140-150℃ constant temperature glue 2~5 minutes, rotor speed control 30~50 rpm; Fourth stage: add accelerator, sulfur and anti-scorching agent, rotor speed control in 10~30 rpm, mixing temperature control 90-115℃.

[0012] Optionally, the inner surface layer is prepared from the following components by weight: 60~100 parts of brominated butyl rubber, 20~60 parts of butyl reclaimed rubber, 10~20 parts of reclaimed modified carbon black, 30~40 parts of carbon black, 1~3 parts of operating oil, 3~6 parts of C5 resin, 3~5 parts of homogenizing agent, 1~5 parts of stearic acid, 2~5 parts of zinc oxide, 0.3~1 parts of vulcanizing agent, 1~3 parts of accelerator, 0.5~2 parts of tackifying resin, 0.1~0.5 parts of anti-scorching agent.

[0013] Optionally, the inner surface layer includes the following steps: First stage: add brominated butyl rubber, butyl reclaimed rubber, part of carbon black, part of reclaimed modified carbon black for roughing, rotor speed control 20~40 rpm, mixing temperature control in 120-140℃; Second stage: add the remaining carbon black, the remaining reclaimed modified carbon black, stearic acid, zinc oxide, operating oil, C5 resin, homogenizing agent and tackifying resin, rotor speed control 20~40 rpm, mixing temperature control in 120-140℃; Third stage: add accelerator, sulfur and anti-scorching agent, rotor speed control 10~30 rpm, mixing temperature control 90-110℃.

[0014] Optionally, the reclaimed natural rubber and butyl reclaimed rubber are formed by devulcanization reaction after waste tire recycling and separation of rubber materials; the reclaimed modified carbon black is formed by thermal cracking and modification after waste tire recycling and separation of rubber materials; the recycled steel is produced by steel ladle refining, hot rolling and casting after waste tire recycling and separation of steel materials.

[0015] Optionally, the reclaimed natural rubber has volatile matter less than 0.50%, ash content 7%~8%, and Mooney 50~65; the butyl reclaimed rubber has volatile matter 6%~10%, ash content less than 0.50%, and Mooney 40~65; the reclaimed modified carbon black has alkali heating amount less than 2.0% and ash content less than 20%.

[0016] Optionally, the recycled steel wire is a recycled steel wire produced by steel ladle refining, hot rolling and casting from scrap steel or recycled scrap steel extracted from waste tires.

[0017] The beneficial effects of the present application are: The combination of multiple sustainable materials is used to improve the proportion of sustainable materials in the environment-friendly tire while maintaining tire performance, effectively utilize sustainable materials, and manufacture high-performance, recyclable, and environmentally friendly truck and bus tires.

[0018] Other features and beneficial effects of the present application will be described in the subsequent specification, and some will become apparent from the specification, or be understood by implementing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The composition of multiple sustainable materials in the environment-friendly truck and bus tire of the embodiment is shown in the figure; Figure 2 The preparation of multiple sustainable materials from waste tires in the embodiment is shown in the figure; Figure 3 The appearance photos of the rubber material of the rubber surface layer of the embodiment and the comparative example are shown in the figure; Figure 4 The appearance photos of the rubber material of the inner surface layer of the embodiment and the comparative example are shown in the figure. DETAILED DESCRIPTION

[0020] The present application will be further explained in conjunction with the drawings and specific embodiments.

[0021] The environment-friendly truck and bus tire of the embodiment containing multiple sustainable material compositions adopts the conventional tire structure design in the field. The tire mainly includes a tread layer, an inner surface layer, and a framework structure. Specifically, the tread layer is the outermost rubber part of the tire that directly contacts the road surface, which is usually designed with specific grooves, and its main functions are to provide grip, transmit traction and braking force, and reduce wear. The inner surface layer mainly refers to the inner liner of the tire, and its main function is to ensure the stability of the internal pressure. The framework structure is the main force supporting body of the tire, which includes: the carcass layer is the main force framework of the tire, which requires sufficient strength and elasticity to withstand load and impact; the belt layer is usually located below the tread and tightly wraps the carcass along the circumferential direction of the tread center line, which functions to enhance the rigidity of the tread and buffer external impact; the tire lip (also known as the tire bead) is the part where the tire is combined with the rim, and its core function is to ensure that the tire can be firmly fixed on the rim and withstand the stretching force due to internal pressure and lateral force during driving.

[0022] The environment-friendly truck and bus tire of the embodiment containing multiple sustainable material compositions, as shown in Figure 1 adopts recycled rubber, recycled carbon black, bio-based materials, and recycled steel wire as raw materials in different structural layers, achieving high-proportion combination application of multiple environmentally friendly sustainable materials. Referring to Figure 2Reclaimed rubber is a reclaimed rubber obtained by devulcanization reaction and other processes after extracting rubber powder from waste tires. It can be divided into reclaimed natural rubber and butyl reclaimed rubber. Reclaimed modified carbon black is a reclaimed carbon black obtained by high-temperature pyrolysis, ultrafine grinding and chemical modification of waste tires. Reclaimed steel wire is a reclaimed steel wire produced by electric furnace method from waste steel wire extracted from waste tires. Bio-based material is bio-based white carbon black extracted from rice husk ash after combustion by alkali dissolution and acid precipitation.

[0023] Tread layer examples In an embodiment, the reclaimed natural rubber and bio-based white carbon black are applied to the tire tread layer. Since the reclaimed natural rubber is extracted from waste tires and belongs to vulcanized material, uneven mixing during production can cause rough surface and dead rubber of the product. In the formula design, dispersant and increased amount of anti-scorching agent are added, and the bio-based white carbon black also belongs to a difficult-to-disperse material, and a coupling agent is added in the formula design. The tread layer of the examples and comparative examples is prepared from the components shown in Table 1 by weight parts: Table 1: Tread layer formula composition

[0024] Environment-friendly reclaimed natural rubber: Jiangsu Zhonghong Company provides reclaimed natural rubber with volatile matter less than 0.50% and ash content of 7.48%, and Mooney viscosity of 50-65.

[0025] Bio-based white carbon black: provided by Germany Winhaiser Company, brand EXP7280, heating alkali amount less than 4.0%-7.0%, PH value 6.2-7.8, specific surface area 215-255 m 2 / g.

[0026] The mixing process of the tread layer of the examples is as follows: First stage: natural rubber, reclaimed natural rubber, part of carbon black, and part of bio-based white carbon black are added for rough mixing, the rotor speed is controlled at 30-50 rpm, and the mixing temperature is controlled at 140-160℃; Second stage: the remaining carbon black, the remaining bio-based white carbon black, stearic acid, microcrystalline wax, zinc oxide, antioxidant and dispersant are added, the rotor speed is controlled at 30-50 rpm, the mixing temperature is controlled at 140-150℃, the automatic rolling time of the auxiliary machine is set to 2-4 minutes, and the roll gap is 3-5 mm; Third stage: coupling agent is added, the mixing temperature is controlled at 140-150℃, the rotor speed is controlled at 30-50 rpm, the mixing temperature is controlled at 140-150℃, the automatic rolling time of the auxiliary machine is set to 2-4 minutes, and the roll gap is 3-5 mm; Fourth stage: accelerator, sulfur and anti-scorching agent are added, the rotor speed is controlled at 10-30 rpm, and the mixing temperature is controlled at 90-115℃.

[0027] By formulating innovation and mixing action optimization, the characteristics of easy roughness, dead rubber and poor adhesion of the surface of products made of reclaimed natural rubber and bio-based white carbon black are solved.

[0028] The appearance of the inner surface layer of the example and the comparative example is shown in the following figure: Figure 3 As can be seen from the figure, the appearance of the inner surface layer of the example is uniform, smooth and has high surface quality.

[0029] Inner surface layer example The butyl reclaimed rubber and the reclaimed modified carbon black are applied to the inner surface layer of the tire. The butyl reclaimed rubber is prone to cause roughness, dead rubber in production, and the addition of scorch retardant and resin tackifier in formula design. The inner surface layer of the example and the comparative example is prepared from the following components by weight: Table 2: Inner surface layer formula composition

[0030] Environment-friendly butyl reclaimed rubber: Nantong Hui Li Company provides 100 mesh butyl reclaimed rubber, volatile matter 6%-10%, ash content less than 0.50%, and Mooney 40-65.

[0031] Reclaimed modified carbon black: provided by Iksda Company, grade EN330, heating alkali content less than 2.0%, ash content less than 20%. The reclaimed modified carbon black is a recycled material, which is a reclaimed carbon black prepared by high temperature pyrolysis, ultrafine grinding and chemical modification process of waste tires.

[0032] The mixing process of the inner surface layer of the example is as follows: First stage: add brominated butyl rubber, butyl reclaimed rubber, part of carbon black, and part of reclaimed modified carbon black for rough mixing, control the rotor speed at 20-40 rpm, and control the mixing temperature at 120-140°C; Second stage: add the remaining carbon black, the remaining reclaimed modified carbon black, stearic acid, zinc oxide, operating oil, C5 resin, uniformizing agent and tackifying resin, control the rotor speed at 20-40 rpm, control the mixing temperature at 120-140°C, set the turning time of the automatic turning system of the auxiliary machine at 2-4 minutes, and control the roll gap at 3-5 mm; Third stage: add accelerator, sulfur and scorch retardant, control the rotor speed at 10-30 rpm, and control the mixing temperature at 90-110°C.

[0033] By formulating innovation and increasing the first mixing action, the characteristics of easy roughness, dead rubber and poor adhesion of the surface of products made of reclaimed butyl rubber are solved. The appearance of the inner surface layer of the example and the comparative example is shown in the following figure: Figure 4 As can be seen from the figure, the appearance of the inner surface layer of the example is uniform, smooth and has high surface quality.

[0034] The results of the performance test of the tread layer rubber of the examples and the comparative examples are shown in Table 3: Table 3: Results of the performance test of the tread layer rubber

[0035] As shown in Table 3, the main physical and mechanical properties of the tread layer rubber of the examples remain stable compared with the performance of the comparative examples without adding sustainable materials, and the wear resistance and heat generation performance are improved to a certain extent.

[0036] The results of the performance test of the inner surface layer rubber of the examples and the comparative examples are shown in Table 4: Table 4: Results of the performance test of the inner surface layer rubber

[0037] As shown in Table 4, the main physical and mechanical properties and air permeability of the inner surface layer rubber of the examples remain stable compared with the performance of the comparative examples without adding sustainable materials, and the dynamic heat generation performance and vulcanization characteristics are improved to a certain extent.

[0038] Skeletal structure examples The skeletal structure is prepared by using recycled steel wire. The recycled steel wire is a recycled steel wire produced by electric furnace method through ladle refining, hot rolling and casting from waste steel wire extracted from waste tires or recycled waste steel. Currently, the traditional steel wire manufacturing is manufactured by converter method, and the waste steel addition ratio of converter process is about 15% to 30%, and the CO2 emission intensity is about 1.7 to 2.2 tons CO2 / ton. The CO2 emission intensity of electric furnace process compared with converter process is 0.3-0.8 ton CO2 / ton, and the waste steel addition ratio can reach 50% to 100%. Therefore, the electric furnace method is an effective means to improve the waste steel recovery ratio and reduce carbon dioxide emissions.

[0039] The recycled steel wire is applied to the tire body layer, steel belt layer and tire lip steel wire, and the performance similar to that of conventional steel wire can be achieved. The recycled steel wire is preferably 0.22+6+12x0.20HT for the tire body layer, 3x0.20+6x0.35HT for the belt layer, and 1.60mm HT for the tire lip steel wire.

[0040] Recycled steel wire: provided by Jiangsu Bekaert Company, and the performance requirements of the recycled steel wire are shown in Table 5: Table 5: Performance standards of recycled steel wire

[0041] Compared with the conventional production of steel wire using wire rod raw material, the recycled steel wire uses recycled scrap steel raw material to produce steel wire with more impurities, such as manganese content of 0.40% to 0.80%, silicon of 0.15% to 0.35%, sulfur of 0.10% to 0.30%, phosphorus of 0.10% to 0.30%, etc. If the recycled steel wire has more impurities, the adhesion between the steel wire and the rubber compound will be weakened. In the design of steel wire rubber formula, the amount of cobalt salt is appropriately increased to promote the formation of copper-sulfur bond and strengthen the bonding between the rubber and the metal interface.

[0042] Tire embodiment

[0043] The above tread layer and inner layer embodiments are made into semi-products, and the recycled steel wire embodiments are made into semi-products to combine and assemble tires with a size of 12R22.5. The tire embryo is formed, and after vulcanization, the finished tire is trimmed, appearance, dynamic and static balance, X-ray detection, and qualified for indoor running test. The above-mentioned tread layer and inner layer comparative examples are made into semi-products, and the same size of conventional steel wire semi-products are combined to prepare tires with the same structure as the comparative examples.

[0044] Tire test: the sustainable tire is subjected to GB running test, and the reference GB test standard is GB / T4501-2023. The indoor GB running result meets the national standard, and the results are shown in Table 6:

[0045] In the present application, for the tread layer: high-performance natural rubber is used with recycled natural rubber, the virgin natural rubber provides the necessary high strength, high elasticity and fatigue resistance, ensuring the benchmark performance, and the recycled natural rubber improves the flowability of the rubber compound and reduces the mixing energy consumption, and the carbonaceous ingredients contained therein also participate in filling to some extent. At a suitable ratio, the virgin rubber forms a continuous high-performance network, and the recycled rubber is integrated as a "filling phase" and a "processing aid", which significantly improves the sustainability ratio while maintaining the mechanical properties. Carbon black is the main force to provide excellent wear resistance. The bio-based white carbon black contains a large number of silicon hydroxyl groups on its surface, which can significantly reduce the dynamic heat generation and rolling resistance of the rubber compound, and greatly improve the grip on wet road surface. Through the above specific combination, the performance is complementary and upgraded to meet the use requirements of the tread layer.

[0046] For the inner surface layer: natural rubber is used to ensure adhesion with other parts of the carcass, and butyl reclaimed rubber is used to form a barrier path that hinders the diffusion of gas molecules in the compound. The adhesion of the inner liner is ensured by the use of tackifiers. The surface activity and dispersibility of the modified reclaimed carbon black are improved, and it is used together with carbon black to ensure basic strength while achieving resource recycling. The filler controls the cost, adjusts the hardness and process performance. Through the above specific combination, the performance is complementary and upgraded to meet the use requirements of the inner surface layer.

[0047] In the skeleton material, the structure of the carcass layer and the proportion of the reclaimed steel are matched, so that the cord is relatively soft and easy to bend and fit during the tire molding process, while maintaining sufficient strength; the structure of the belt layer and the proportion of the reclaimed steel are matched, and the cord has high rigidity (the rigidity value 930 in the table is more than 3 times that of the carcass cord 306), which can effectively resist impact, inhibit the deformation of the tread, and improve the handling and wear resistance. The single high-strength steel wire used in the tire lip bears the huge stress generated by firmly fixing the tire on the hub, ensuring that the tire does not come off during driving.

[0048] Through the cooperation of the above formula and structure technology, the purpose of high sustainable material ratio is achieved under the premise of maintaining high tire performance, effectively reducing carbon emissions, and suitable for actual production application.

[0049] The above examples are only used to further illustrate an environmentally friendly truck tire containing a plurality of sustainable materials according to the present application, but the present application is not limited to the examples, and any simple modification, equivalent change and modification of the above examples according to the technical essence of the present application fall within the protection scope of the technical scheme of the present application.

Claims

1. An environmentally friendly truck and bus tire composed of multiple sustainable materials, characterized in that: It includes the tread layer, inner layer, and skeleton structure, among which, The raw materials of the tread layer include natural rubber, recycled natural rubber, carbon black and bio-based silica, and the weight ratio of natural rubber, recycled natural rubber, carbon black and bio-based silica is (5~8):(2~5):(3~5):(1~3). The raw materials of the inner layer include brominated butyl rubber, butyl reclaimed rubber, carbon black and recycled modified carbon black, and the weight ratio of brominated butyl rubber, butyl reclaimed rubber, carbon black and recycled modified carbon black is (6~10):(2~6):(3~4):(1~2). The skeletal structure includes a carcass layer, a belt layer, and a tire bead, all of which are made of recycled steel wire. The recycled steel wire cord used in the carcass layer has a tensile strength of not less than 1775 N, a rigidity of not less than 306 N*mm², and a recycled steel ratio of not less than 50%. The recycled steel wire cord used in the belt layer has a tensile strength of not less than 1820 N, a rigidity of not less than 930 N*mm², and a recycled steel ratio of not less than 50%. The recycled steel wire used in the tire bead has a tensile strength of not less than 4120 N, a rigidity of not less than 64307 N*mm², and a recycled steel ratio of not less than 70%.

2. The environmentally friendly truck and bus tire comprising a variety of sustainable materials as described in claim 1, characterized in that: In the environmentally friendly truck and bus tires that contain a variety of sustainable materials, the total mass of natural rubber, recycled natural rubber, bio-based silica, butyl recycled rubber, recycled modified carbon black, and recycled steel wire accounts for 30% to 70% of the total mass of the tire materials used.

3. The environmentally friendly truck and bus tire comprising multiple sustainable materials as described in claim 1, characterized in that: The recycled steel cord used in the carcass layer has a structure of 0.22+6+12×0.20HT, the recycled steel cord used in the belt layer has a structure of 3×0.20+6×0.35HT, and the recycled steel cord used in the tire bead has a structure of 1.60mmHT.

4. The environmentally friendly truck and bus tire comprising multiple sustainable materials as described in claim 1, characterized in that: The tread layer is prepared from the following components in parts by weight: 50-80 parts natural rubber, 20-50 parts recycled natural rubber, 30-50 parts carbon black, 10-30 parts bio-based silica, 2-5 parts antioxidant, 1-5 parts stearic acid, 2-5 parts zinc oxide, 1-3 parts vulcanizing agent, 1-3 parts accelerator, 1-5 parts dispersant, 1-5 parts coupling agent, 0.1-0.5 parts anti-scorching agent, and 0.5-2 parts microcrystalline wax.

5. The environmentally friendly truck and bus tire comprising a variety of sustainable materials according to claim 4, characterized in that, The rubber compounding process for the tread layer includes: The first stage involves adding natural rubber, recycled natural rubber, some carbon black, and some bio-based silica for refining. The rotor speed is controlled at 30-50 rpm, and the mixing temperature is controlled at 140-160℃. Second stage: Add the remaining carbon black, remaining bio-based silica, stearic acid, microcrystalline wax, zinc oxide, antioxidant and dispersant, control the rotor speed at 30~50 rpm and the mixing temperature at 140-150℃; Third stage: Add coupling agent, control the mixing temperature at 140-150℃ and mix the rubber at a constant temperature for 2-5 minutes, and control the rotor speed at 30-50 rpm; Fourth stage: Add accelerator, sulfur and anti-scorching agent, control rotor speed at 10~30 rpm, and control mixing temperature at 90-115℃.

6. The environmentally friendly truck and bus tire comprising a variety of sustainable materials according to claim 1, characterized in that: The inner layer is prepared from the following components in parts by weight: 60-100 parts brominated butyl rubber, 20-60 parts butyl recycled rubber, 10-20 parts recycled modified carbon black, 30-40 parts carbon black, 1-3 parts processing oil, 3-6 parts C5 resin, 3-5 parts homogenizer, 1-5 parts stearic acid, 2-5 parts zinc oxide, 0.3-1 parts vulcanizing agent, 1-3 parts accelerator, 0.5-2 parts tackifying resin, and 0.1-0.5 parts anti-scorching agent.

7. The environmentally friendly truck and bus tire comprising a variety of sustainable materials as described in claim 6, characterized in that, The rubber compounding process for the inner surface layer includes: First stage: Add brominated butyl rubber, butyl recycled rubber, some carbon black, and some recycled modified carbon black for refining. Control the rotor speed at 20~40 rpm and the mixing temperature at 120-140℃. Second stage: Add the remaining carbon black, remaining recycled modified carbon black, stearic acid, zinc oxide, processing oil, C5 resin, homogenizer and thickening resin, control the rotor speed at 20~40 rpm, and control the mixing temperature at 120-140℃. The third stage involves adding accelerators, sulfur, and anti-scorching agents, controlling the rotor speed at 10-30 rpm, and controlling the mixing temperature at 90-110℃.

8. The environmentally friendly truck and bus tire comprising multiple sustainable materials according to claim 1, characterized in that: The recycled natural rubber and butyl recycled rubber are formed by desulfurization reaction after the rubber materials are separated from waste tires; the recycled modified carbon black is formed by thermal cracking and modification after the rubber materials are separated from waste tires; the recycled steel is produced by ladle refining, hot rolling and casting after the steel materials are separated from waste tires by electric furnace method.

9. The environmentally friendly truck and bus tire comprising a variety of sustainable materials according to claim 8, characterized in that: The recycled natural rubber has a volatile content of less than 0.50%, an ash content of 7% to 8%, and a Mooney content of 50 to 65; the butyl recycled rubber has a volatile content of 6% to 10%, an ash content of less than 0.50%, and a Mooney content of 40 to 65; the recycled modified carbon black has a heating alkali content of less than 2.0% and an ash content of less than 20%.

10. The environmentally friendly truck and bus tire comprising a variety of sustainable materials according to claim 8, characterized in that: The recycled steel wire is produced by refining, hot rolling, and casting recycled steel extracted from waste tires or recycled waste steel through an electric furnace process.

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