Low-rolling-resistance bionic coupling tread rubber filled with waste tire particles and preparation method of low-rolling-resistance bionic coupling tread rubber

Abstract

The invention discloses low-rolling-resistance bionic coupling tread rubber filled with waste tire particles and a preparation method of the tread rubber. The tread rubber comprises a symmetric line located in the center and two pattern areas which are in mirror symmetry about the symmetric line. The pattern area comprises a first pattern unit, a plurality of second pattern units and a third pattern unit which extend outwards from a symmetric line, and the distance between the first pattern unit and the second pattern unit, the distance between the adjacent second pattern units and the distance between the second pattern unit and the third pattern unit are the same; the first pattern units and the second pattern units are internally provided with a plurality of first pattern blocks which are arranged in an array along the extending direction of the pattern units, the third pattern units are internally provided with second pattern blocks which are uniformly arrayed along the third pattern units, and the space between every two adjacent second pattern blocks is filled with a plurality of first pattern blocks. The wear resistance of the tread rubber can be improved.

Description

Technical Field

[0001] The present invention relates to the field of tread rubber preparation, and particularly to a low rolling resistance bionic coupling tread rubber filled with waste tire particles and a preparation method thereof. Background Art

[0002] After being processed, waste tire particles can effectively reduce the production cost of rubber products such as tires, and at the same time reduce the dependence on virgin rubber resources, realizing the recycling of resources. However, how to further improve the added value while ensuring the performance of rubber products filled with waste tire particles has become the focus of researchers.

[0003] As a design concept that mimics the structure and function of organisms in nature, bionic technology provides a new idea for solving this problem. In nature, many biological surfaces have unique textures and structures, which are not only beautiful, but also exhibit excellent performance in reducing friction and improving wear resistance. For example, the soles of some animals can maintain stable grip in complex environments and reduce wear through fine texture design. Applying these biological principles to the design of tire tread rubber is expected to improve the wear resistance and grip performance of tires by simulating the texture structure of biological surfaces, while reducing rolling resistance and achieving the goal of energy conservation and environmental protection. At the same time, the rapid development of 3D printing technology has brought a revolutionary change to the tire manufacturing industry. With its characteristics of high precision, high flexibility and customization, 3D printing technology makes it possible to manufacture complex structures. In the field of tire manufacturing, 3D printing technology can precisely control the shape, texture and material distribution of tread rubber, thus achieving design effects that are difficult to achieve by traditional processes. Especially in the preparation of the tread pattern layer of tread rubber, 3D printing technology can accurately print complex bionic textures according to needs. These textures are not only beautiful, but more importantly, can significantly improve the wear resistance and grip performance of tires. Combining the recycling of waste tire particles, the bionic design concept and the advantages of 3D printing technology, the present invention patent proposes a low rolling resistance bionic coupling tread rubber filled with waste tire particles and a 3D printing preparation method thereof. The tread rubber is divided into two layers, the inner layer is a low rolling resistance tread rubber filled with waste tire particles to reduce the rolling resistance of the tire and achieve energy conservation and environmental protection; the outer layer is a bionic pattern layer precisely prepared by 3D printing technology, which is composed of a low rolling resistance tread rubber filled with waste tire particles and a high wear resistance tread rubber coupled together. This pattern layer is not only beautiful, but also can form a more effective coupled pattern during the natural wear of the tire, further improving the wear resistance of the tire. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the first aspect of the present invention provides a low rolling resistance bionic coupled tread rubber filled with waste tire particles, the tread rubber including a symmetry line located in the center and two pattern areas that are mirror-symmetrical to the symmetry line, the pattern area including a first pattern unit, a plurality of second pattern units and a third pattern unit extending outward from the symmetry line, the spacing between the first pattern unit and the second pattern unit, the spacing between adjacent second pattern units, and the spacing between the second pattern unit and the third pattern unit are the same; the first pattern unit and the second pattern unit are provided with a plurality of first pattern blocks arranged in an array along the extension direction of the pattern units, the third pattern unit is provided with second pattern blocks uniformly arrayed along the third pattern unit, and a plurality of first pattern blocks are filled between adjacent second pattern blocks.

[0005] Furthermore, the first pattern block includes four small circles and a central circle, the center line of the four small circles forms a square, and the central circle is located at the center of the square.

[0006] Furthermore, the radii of the four small circles are smaller than the radius of the central circle.

[0007] Furthermore, the first side of the second pattern block is the edge of the third pattern unit, the second side and the third side intersect at the other side edge of the third pattern unit, and the angle between the second side and the third side is an acute angle.

[0008] Furthermore, the plurality of second pattern blocks divides the third pattern unit into a plurality of regions, wherein a plurality of first pattern blocks are provided in the regions, and the centers of the first pattern blocks are collinear.

[0009] Furthermore, the first pattern block and the second pattern block are made of a low rolling resistance rubber material, and the tread rubber is made of a high wear-resistant rubber material.

[0010] Furthermore, the low rolling resistance rubber material comprises, by weight:

[0011] Natural rubber: 10-80 parts; ECO polychlorohydrin compound: 10-50 parts; BR9000 polybutylene rubber: 10-80 parts; low hysteresis carbon black DZ-13: 5-60 parts; highly dispersed silica: 5-60 parts; silane coupling agent: 3-5 parts; waste tire particles: 20-60 parts; aramid staple fiber: 3-10 parts; zinc oxide: 3.5-5 parts; stearic acid: 2-3 parts; accelerator NS: 1.0-2 parts; accelerator DTDM: 0.5-1 part; anti-aging agent 4020: 2-4 parts; anti-scorch agent CTP: 0.1-0.3 parts; vulcanizing agent: 1.5-3 parts.

[0012] Furthermore, the waste tire particles contain 60% rubber, 30% carbon black, 5% white carbon black, and 5% others, and the particle size is 400 mesh.

[0013] Further, by mass, the highly wear-resistant rubber compound includes:

[0014] Natural rubber: 10 - 80 parts; cis-1,4-polybutadiene rubber BR9000: 10 - 90 parts; 2000-mesh zirconia nanoparticles (ZrO₂): 2 - 5 parts; carbon black N330: 10 - 60 parts; white carbon black: 5 - 60 parts; silane coupling agent: 1 - 3 parts; stearic acid: 2 - 3 parts; anti-aging agent 4020: 2 - 4 parts; environmentally friendly aromatic oil: 1 - 3 parts; anti-scorching agent CTP: 0.1 - 0.3 parts; zinc oxide: 3.5 - 4.5 parts; accelerator NS: 1.0 - 1.8 parts; accelerator DTDM: 0.3 - 0.8 parts; vulcanizing agent: 1.3 - 2.6 parts.

[0015] The second aspect of the present invention provides a preparation method of a low rolling resistance bionic coupling tread rubber filled with waste tire particles, including the following steps:

[0016] Preparing the low rolling resistance rubber compound:

[0017] Add natural rubber, epichlorohydrin rubber compound, and cis-1,4-polybutadiene rubber, press the upper ram to raise the temperature of the rubber compound to 140 - 160 °C, and keep it in the internal mixer for plasticizing for 120 - 180 seconds;

[0018] Raise the upper ram, add other components except the accelerator and the vulcanizing agent, press the upper ram to raise the temperature of the rubber compound to 140 - 160 °C, and keep it for 120 - 180 seconds;

[0019] Discharge the rubber compound, and place it in air cooling for 2 - 4 hours;

[0020] Put it on the open mill, add the accelerator and the vulcanizing agent, raise the temperature of the rubber compound to 70 - 90 °C, knead for 180 - 240 seconds, with a thickness of 3 - 10 mm, and place it at room temperature for 8 - 12 hours;

[0021] Preparing the highly wear-resistant rubber compound:

[0022] Add natural rubber, epichlorohydrin rubber compound, and cis-1,4-polybutadiene rubber, press the upper ram to raise the temperature of the rubber compound to 140 - 160 °C, and keep it in the internal mixer for plasticizing for 120 - 180 seconds;

[0023] Raise the upper ram, add other components except the accelerator and the vulcanizing agent, press the upper ram to raise the temperature of the rubber compound to 140 - 160 °C, and keep it for 120 - 180 seconds;

[0024] Discharge the rubber compound, and place it in air cooling for 2 - 4 hours;

[0025] Put it on the open mill, add the accelerator and the vulcanizing agent, raise the temperature of the rubber compound to 70 - 90 °C, knead for 180 - 240 seconds, and place it at room temperature for 8 - 12 hours;

[0026] The coupling rubber compound is prepared by 3D printing. The low rolling resistance rubber compound and the high wear-resistant rubber compound are respectively placed into two material hoppers of a two-color printer and printed according to the pattern on the outer layer. The temperature of the printer head is 140 - 160 °C, and the extrusion pressure is 5 - 20 MPa. The low rolling resistance rubber compound and the high wear-resistant rubber compound are placed in sequence, put into a production mold and pressurized at 10 - 25 MPa, the temperature is 140 - 160 °C, and the time is 20 - 45 min.

[0027] Compared with the prior art, the present invention has the following technical effects:

[0028] The present invention places the bionic pattern into the tread rubber of the tire, and uses two different materials of rubber compounds to couple and form a composite rubber compound with both low rolling resistance and high wear resistance. Moreover, the rubber compound used takes waste tires as raw materials, solves the problem of waste tire treatment, improves the tire performance, and promotes the green development and technological innovation of the tire manufacturing industry.

[0029] The following will further illustrate the concept, specific structure and technical effects generated by the present invention with reference to the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention. Brief Description of the Drawings

[0030] Figure 1 is a schematic diagram of the tread rubber pattern structure of a specific embodiment of the present invention;

[0031] Figure 2 is a schematic diagram of the structure of the first tread block of a specific embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of the structure of the second tread block of a specific embodiment of the present invention. Detailed Description of the Invention

[0033] The following illustrates the embodiments of the present invention through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0034] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0035] Such asFigure 1 As shown, a bionic coupling tread compound filled with waste tire particles, the tread compound includes a symmetry line at the center and two tread pattern areas that are mirror-symmetrical with respect to the symmetry line. The tread pattern areas include a first tread pattern unit 1 extending outward from the symmetry line, several second tread pattern units 2, and a third tread pattern unit 3. The width of the first tread pattern unit 1 is greater than the width of the second tread pattern unit. The first tread pattern unit 1, the second tread pattern unit 2, and the third tread pattern unit 3 are all rectangular structures extending along the forward direction of the vehicle. And between the first tread pattern unit 1 and the second tread pattern unit 2, between adjacent second tread pattern units 2, and between the second tread pattern unit 2 and the third tread pattern unit 3, there are fourth tread pattern units 4. The fourth tread pattern 4 is a rectangular structure extending along the forward direction of the vehicle, and the width K1 of each fourth tread pattern unit 4 is the same.

[0036] In a specific embodiment, the range of the width K2 of the second tread pattern unit 2 is 6 - 30 mm, the range of the width K3 of the first tread pattern unit 1 is 8 - 40 mm; the range of the width K1 of the fourth tread pattern unit 4 is 2 - 10 mm.

[0037] As shown in the figure, the structures of the first tread pattern unit 1 and the second tread pattern unit 2 are the same, and are composed of several uniformly distributed first tread blocks A. In this embodiment, the several first tread blocks A in the first tread pattern unit 1 are sequentially and uniformly arranged in an array along the length direction of the first tread pattern unit 1.

[0038] The dung beetle belongs to the insects of the subfamily Scarabaeinae or Coprinae of Coleoptera. Through the study of the body surface morphology of the dung beetle by scanning electron microscopy, 4 kinds of concave morphologies are found on the body surfaces of its head, chest, abdomen and feet. Most of the arrangement patterns are radially distributed with the horn process as the center. The concave morphologies are simple pits, annular pits, pits with a central bulge, and grooved depressions. The structure of the first tread block A in this embodiment is as Figure 2 shown, including four small circles and a central circle. The radii of the four small circles are smaller than the radius of the central circle; the connecting lines of the centers of the four small circles form a square, and the center of the central circle is located at the center of the square. The four small circles are radially distributed around the center of the central circle with the center of the central circle as the center, so as to bionic the body surface structure of the dung beetle. During the running of the wheel, the uniformly arranged first tread blocks make the surface of the tread compound non-smooth. During the working process, it can change the movement mode of the hard object being worn, that is, from the sliding mode to the rolling mode, and can also be more conducive to reducing the positive pressure and reducing the friction component, so as to achieve the effects of reducing wear and extending the service life of the tread compound.

[0039] In this embodiment, the distance L between the centers of two adjacent small circles ranges from 5 to 10 mm, the radius R2 of the small circle ranges from 1 to 3 mm, the radius R1 of the central circle ranges from 1.5 to 5 mm, and the distance J1 between two first tread blocks A ranges from 6 to 30 mm.

[0040] The third tread unit 3 is provided with second tread blocks B evenly arranged in an array along the extending direction of the third tread unit. As Figure 3 shown, the second tread block B is triangular, including three sides, namely side a, side b, and side c, and the length D1 of side a is less than the length D2 of side b which is less than the length of side c. Among them, side a coincides with the edge of the third tread unit 3, the intersection of side b and side c is located at the other edge of the third tread unit 3, the angle between side b and side a is an obtuse angle, and both side b and plate c form acute angles with the advancing direction of the wheel. Since the third tread unit 3 is located at the edge position of the tread rubber, the second tread block B at this time serves as the transverse connecting tread of the third tread unit 3, making the structure of the third tread unit 3 more stable and preventing damage to the third tread unit 3 during vehicle travel. Moreover, the second tread block B in this application has a long and narrow triangular structure, which not only has the stability of the triangle itself but also can improve the drainage performance of the tread rubber. In this embodiment, the ratio between the length D1 of side a and the length D2 of side b is 1:3, the range of D1 is 3 to 8 mm, the range of D2 is 9 to 24 mm, the angle θ between side a and side b is 120 to 150°, and the distance J2 between two adjacent second tread blocks B ranges from 15 to 25 mm.

[0041] A number of first tread blocks A are filled in the area between adjacent second tread blocks B. The centers of the central circles of all first tread blocks A are collinear, and the connecting lines between the centers form acute angles with the advancing direction of the wheel. In a specific implementation, the connecting lines of the centers of each central circle are substantially parallel to side b or side c. The first tread blocks A and the second tread blocks B are arranged alternately, making the tread rubber have better wear resistance, wet skid resistance, and rolling resistance.

[0042] The tread rubber is composed of a low rolling resistance rubber layer and a high wear resistance rubber layer arranged in a stacked manner. The high wear resistance rubber layer is provided with through grooves corresponding to the first tread blocks A, the second tread blocks B, and the fourth tread unit. The low rolling resistance rubber layer extends outward and fills into the through grooves. As the tire wears, the low rolling resistance rubber layer in the through grooves protrudes outward, forming protruding treads. The low rolling resistance tread rubber is relatively soft, and the high wear resistance tread rubber is relatively hard. Two rubber layers with different properties are alternately stacked and combined in the form of "brick and mud" to form a composite material, which can improve the tensile strength and wear resistance of the tread rubber.

[0043] The low rolling resistance rubber compound, by mass, includes:

[0044] Natural rubber: 10 - 80 parts; Epichlorohydrin rubber ECO: 10 - 50 parts; Butadiene rubber BR9000: 10 - 80 parts; Low hysteresis carbon black DZ - 13: 5 - 60 parts; High - dispersion silica: 5 - 60 parts; Silane coupling agent: 3 - 5 parts; Waste tire particles: 20 - 60 parts; Aramid short fibers: 3 - 10 parts; Zinc oxide: 3.5 - 5 parts; Stearic acid: 2 - 3 parts; Accelerator NS: 1.0 - 2 parts; Accelerator DTDM: 0.5 - 1 part; Antioxidant 4020: 2 - 4 parts; Antiscorching agent CTP: 0.1 - 0.3 part; Vulcanizing agent: 1.5 - 3 parts. In this example, the low - rolling - resistance rubber compound using Epichlorohydrin rubber ECO has better heat - resistance and low - temperature resistance compared with natural rubber, has a relatively large compression set and excellent dynamic fatigue performance, and can also be better applied to the 3D printing process to prepare composite tread rubber. At the same time, considering the large addition of waste tire particles, the utilization rate of waste tires is solved.

[0045] In this example, the rubber in the waste tire particles accounts for 55 - 65%, carbon black accounts for 25 - 30%, silica accounts for 3 - 8%, and others account for 3 - 8%, and the particle size is 200 - 400 mesh.

[0046] The high - wear - resistant rubber compound, by mass parts, includes:

[0047] Natural rubber: 10 - 80 parts; Butadiene rubber BR9000: 10 - 90 parts; 2,000 - mesh zirconia nanoparticles (ZrO2): 2 - 5 parts; Carbon black N330: 10 - 60 parts; Silica: 5 - 60 parts; Silane coupling agent: 1 - 3 parts; Stearic acid: 2 - 3 parts; Antioxidant 4020: 2 - 4 parts; Environment - friendly aromatic oil: 1 - 3 parts; Antiscorching agent CTP: 0.1 - 0.3 part; Zinc oxide: 3.5 - 4.5 parts; Accelerator NS: 1.0 - 1.8 parts; Accelerator DTDM: 0.3 - 0.8 part; Vulcanizing agent: 1.3 - 2.6 parts. In this example, the 2,000 - mesh zirconia nanoparticles (ZrO2) in the high - wear - resistant rubber compound can not only improve wear resistance but also improve wet - skid resistance.

[0048] All raw materials in this application are purchased on the market. Among them, the waste tire particles are ground from 60 - 150 - mesh raw materials purchased on the market into the required 200 - 400 - mesh particles. Before using the waste tire particles, they need to be pretreated. The pretreatment process of the waste tire particles includes:

[0049] The waste tire particles are soaked in a mixed solution of vegetable oil and silane coupling agent. The vegetable oil can be corn oil, which accounts for 20% of the mixed solution, and the silane coupling agent (KH550) accounts for 80% of the mixed solution. After soaking for 60 - 120 minutes, they are taken out and dried (the drying time is 12 - 24 hours) for standby.

[0050] In a specific embodiment, a method for preparing a low rolling resistance bionic coupling tread rubber filled with waste tire particles is provided to prepare the tread rubber described in the above embodiment. The specific steps are as follows:

[0051] S1. Prepare the low rolling resistance rubber compound:

[0052] S11. Add natural rubber, epichlorohydrin rubber compound, and cis-butadiene rubber, press the upper plug to raise the temperature of the rubber compound to 140 - 160 °C, and keep it in the internal mixer for plasticizing for 120 - 180 seconds;

[0053] S12. Raise the upper plug, add other components except accelerators and vulcanizing agents, press the upper plug to raise the temperature of the rubber compound to 140 - 160 °C, and keep it for 120 - 180 seconds;

[0054] S13. Discharge the rubber, and place it in air cooling for 2 - 4 hours;

[0055] S14. Put it on the open mill, add accelerators and vulcanizing agents, raise the temperature of the rubber compound to 70 - 90 °C, knead for 180 - 240 seconds, with a thickness of 3 - 10 mm, and place it at room temperature for 8 - 12 hours;

[0056] S2. Prepare the high wear-resistant rubber compound:

[0057] S21. Add natural rubber, epichlorohydrin rubber compound, and cis-butadiene rubber, press the upper plug to raise the temperature of the rubber compound to 140 - 160 °C, and keep it in the internal mixer for plasticizing for 120 - 180 seconds;

[0058] S22. Raise the upper plug, add other components except accelerators and vulcanizing agents, press the upper plug to raise the temperature of the rubber compound to 140 - 160 °C, and keep it for 120 - 180 seconds;

[0059] S23. Discharge the rubber, and place it in air cooling for 2 - 4 hours;

[0060] S24. Put it on the open mill, add accelerators and vulcanizing agents, raise the temperature of the rubber compound to 70 - 90 °C, knead for 180 - 240 seconds, and place it at room temperature for 8 - 12 hours;

[0061] S3. Prepare the coupling rubber compound by 3D printing method. Put the low rolling resistance rubber compound and the high wear-resistant rubber compound into two material hoppers of a two-color printer respectively, and print according to the pattern of the outer layer. The temperature of the printer head is 140 - 160 °C, the extrusion pressure is 5 - 20 MPa. Place the low rolling resistance rubber compound and the high wear-resistant rubber compound in sequence, put them into the production mold, apply a pressure of 10 - 25 MPa, the temperature is 140 - 160 °C, and the time is 20 - 45 min.

[0062] To further illustrate the effects of the present invention, in a specific embodiment, the components of Examples 1-4 and Comparative Examples 1-2 in Table 1 were used as raw materials for preparing low rolling resistance rubber compounds and high wear-resistant rubber compounds. The preparation method of the composite tread rubber was as follows:

[0063] S1. Prepare the low rolling resistance rubber compound:

[0064] Add natural rubber, epichlorohydrin rubber stock, and cis-butadiene rubber, press the upper plug to raise the temperature of the rubber compound to 160 °C, and keep it in the internal mixer for plasticizing for 150 seconds; S12. Raise the upper plug and add other components except for the accelerator and vulcanizing agent, press the upper plug to raise the temperature of the rubber compound to 150 °C and keep it for 160 seconds; Discharge the rubber, air-cool and place it for 3 hours; Put it on the open mill, add the accelerator and vulcanizing agent, raise the temperature of the rubber compound to 75 °C, knead for 200 seconds, with a thickness of 8 mm, and place it at room temperature for 12 hours;

[0065] S2. Prepare the high wear-resistant rubber compound:

[0066] Add natural rubber, epichlorohydrin rubber stock, and cis-butadiene rubber, press the upper plug to raise the temperature of the rubber compound to 140-160 °C and keep it in the internal mixer for plasticizing for 160 seconds; Raise the upper plug and add other components except for the accelerator and vulcanizing agent, press the upper plug to raise the temperature of the rubber compound to 150 °C and keep it for 180 seconds; Discharge the rubber, air-cool and place it for 3 hours; Put it on the open mill, add the accelerator and vulcanizing agent, raise the temperature of the rubber compound to 90 °C, knead for 200 seconds, and place it at room temperature for 12 hours;

[0067] S3. Prepare the coupled rubber compound by 3D printing method. Put the low rolling resistance rubber compound and the high wear-resistant rubber compound into two material hoppers of a two-color printer respectively, and print according to the pattern of the outer layer. The temperature of the printer head is 150 °C, the extrusion pressure is 13 MPa. Place the low rolling resistance rubber compound and the high wear-resistant rubber compound in sequence, put them into the production mold, apply a pressure of 13 MPa, at a temperature of 150 °C for 30 minutes.

[0068] Table 1: Component Table

[0069]

[0070]

[0071] Prepare the composite tread rubber based on the components in Table 1, conduct (what experiment), and obtain the experimental results as shown in Table 2.

[0072] Table 2: Experimental Result Table

[0073]

[0074] In summary, the inner layer is made of a low rolling resistance tread rubber layer filled with waste tire particles, and the outer layer (pattern layer) is coupled by the low rolling resistance tread rubber and the high wear-resistant tread rubber. The preparation of the outer layer coupled rubber is realized by 3D printing technology. Filling a large amount of waste tires reduces the cost of the tires, realizes the recycling of waste tires, and the low rolling resistance of the tread rubber also realizes energy conservation and environmental protection. Moreover, due to the different wear resistances of the two types of tread rubber, after wear, the tread rubber will naturally form a coupled pattern, and the formation of the pattern can provide the wear resistance of the tread rubber. Since the performance of the tread rubber with added waste tire particles decreases, the composite tread rubber formed by coupling the inner and outer layer tread rubbers in this application can achieve good performance.

[0075] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A bionic coupled tread rubber filled with waste tire particles, characterized in that, The tread rubber includes a symmetry line located in the center and two pattern areas that are mirror-symmetrical to the symmetry line. The pattern area includes a first pattern unit, a plurality of second pattern units and a third pattern unit extending outward from the symmetry line. The first pattern unit, the second pattern unit and the third pattern unit are all rectangular structures extending in the direction of vehicle travel. A fourth pattern unit is provided between the first pattern unit and the second pattern unit, between adjacent second pattern units, and between the second pattern unit and the third pattern unit. The fourth pattern is a rectangular structure extending in the direction of vehicle travel.

2. The low rolling resistance bionic coupling tread rubber filled with waste tire particles according to claim 1, characterized in that, The first pattern block includes four small circles and a central circle. The center line of the four small circles forms a square, and the central circle is located at the center of the square.

3. The low rolling resistance bionic coupling tread rubber filled with waste tire particles according to claim 1, characterized in that The radii of the four small circles are smaller than the radius of the central circle.

4. The low rolling resistance bionic coupling tread rubber filled with waste tire particles according to claim 1, wherein The second pattern block is a triangle, the first side of the triangle is the edge of the third pattern unit, the second side and the third side intersect at the other side edge of the third pattern unit, and the angle between the second side and the third side is an acute angle.

5. The low rolling resistance bionic coupling tread rubber filled with waste tire particles according to claim 4, characterized in that, The plurality of second pattern blocks divides the third pattern unit into a plurality of regions. A plurality of first pattern blocks are arranged in the regions, and the centers of the first pattern blocks are collinear.

6. The low rolling resistance bionic coupled tread rubber filled with waste tire particles according to claim 1, wherein The first pattern block and the second pattern block are made of low rolling resistance rubber material, and the tread rubber is made of high wear-resistant rubber material.

7. The low rolling resistance bionic coupling tread rubber filled with waste tire particles according to claim 6, characterized in that, The low rolling resistance rubber material comprises, by mass, the following: Natural rubber: 10-80 parts; ECO polychlorohydrin compound: 10-50 parts; BR9000 polybutylene rubber: 10-80 parts; low hysteresis carbon black DZ-13: 5-60 parts; highly dispersed silica: 5-60 parts; silane coupling agent: 3-5 parts; waste tire particles: 20-60 parts; aramid staple fiber: 3-10 parts; zinc oxide: 3.5-5 parts; stearic acid: 2-3 parts; accelerator NS: 1.0-2 parts; accelerator DTDM: 0.5-1 part; anti-aging agent 4020: 2-4 parts; anti-scorch agent CTP: 0.1-0.3 parts; vulcanizing agent: 1.5-3 parts.

8. The bionic coupling tread rubber filled with waste tire particles according to claim 7, characterized in that The waste tire particles contain 60% rubber, 30% carbon black, 5% white carbon black, and 5% others, and the particle size is 400 mesh.

9. The low rolling resistance bionic coupling tread rubber filled with waste tire particles according to claim 6, characterized in that, The highly wear-resistant rubber material comprises, by weight: Natural rubber: 10-80 parts; butadiene rubber BR9000: 10-90 parts; 2000 mesh zirconium oxide nanoparticles (ZrO2): 2-5 parts; carbon black N330: 10-60 parts; white carbon black: 5-60 parts; silane coupling agent: 1-3 parts; stearic acid: 2-3 parts; anti-aging agent 4020: 2-4 parts; environmentally friendly aromatic oil: 1-3 parts; anti-scorch agent CTP: 0.1-0.3 parts; zinc oxide: 3.5-4.5 parts; accelerator NS: 1.0-1.8 parts; accelerator DTDM: 0.3-0.8 parts; vulcanizing agent: 1.3-2.6 parts.

10. A preparation method of a low rolling resistance bionic coupling tread rubber filled with waste tire particles, characterized in that, The steps include: Preparation of low rolling resistance compounds: Add natural rubber, epichlorohydrin compound rubber and butadiene rubber, press the top plug and heat the rubber to 140-160℃, keep it in the internal mixer and plasticize for 120-180 seconds; Raise the upper plug and add other ingredients except the accelerator and vulcanizing agent. Press the upper plug to heat the rubber compound to 140 - 160 °C and keep it for 120 - 180 seconds; Discharge the rubber, and place it in air cooling for 2 - 4 hours; Put it on the open mill, add the accelerator and vulcanizing agent, heat the rubber compound to 70 - 90 °C, knead for 180 - 240 seconds, with a thickness of 3 - 10 mm, and place it at room temperature for 8 - 12 hours; Prepare a high wear-resistant rubber compound: Add natural rubber, epichlorohydrin rubber blend, and cis-butadiene rubber. Press the upper plug to heat the rubber compound to 140 - 160 °C and keep it for 120 - 180 seconds for plastic refining in the internal mixer; Raise the upper plug and add other ingredients except the accelerator and vulcanizing agent. Press the upper plug to heat the rubber compound to 140 - 160 °C and keep it for 120 - 180 seconds; Discharge the rubber, and place it in air cooling for 2 - 4 hours; Put it on the open mill, add the accelerator and vulcanizing agent, heat the rubber compound to 70 - 90 °C, knead for 180 - 240 seconds, and place it at room temperature for 8 - 12 hours; Prepare the coupled rubber compound by 3D printing method. Put the low rolling resistance rubber compound and the high wear-resistant rubber compound into two material hoppers of a two-color printer respectively, and print according to the pattern on the outer layer. The temperature of the printer head is 140 - 160 °C, the extrusion pressure is 5 - 20 MPa. Place the low rolling resistance rubber compound and the high wear-resistant rubber compound in order, put them into the production mold and apply a pressure of 10 - 25 MPa, the temperature is 140 - 160 °C, and the time is: 20 - 45 min.

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