Solid tire

Abstract

The invention relates to the technical field of solid tires, and discloses a solid tire which structurally comprises an outer rubber layer, a middle reinforcing structure layer and an inner rubber layer, the outer rubber layer has specific hardness and wear resistance, the middle reinforcing structure layer is composed of high-strength fiber braided fabric, and the inner rubber layer plays a role in buffering and supporting. The high-quality solid tires meeting different requirements can be prepared, and the high-quality solid tires are excellent in the aspects of bearing capacity, wear resistance, road holding force, comfort and the like. Compared with the prior art, the solid tire is unique and innovative in structure, formula and preparation process, brings remarkable progress to the field of solid tires, has wide application prospect and market potential, and has important significance in promoting development of related industries. The solid tire and the preparation method thereof have outstanding creativity and practicability, a new benchmark is established for the field of tires, and better use experience and higher economic benefits are brought to users.

Description

Technical Field

[0001] The invention relates to the technical field of solid tires, in particular to a solid tire. Background Art

[0002] With the continuous development of modern industry and transportation, the demand for solid tires is growing. In many application scenarios, such as industrial vehicles and special vehicles, solid tires are widely used because they do not require inflation and have low maintenance costs.

[0003] However, traditional solid tires often have some shortcomings in practical applications. For example, some solid tires have insufficient grip and are prone to slipping on slippery roads or under special working conditions, affecting driving safety; their strength and wear resistance may not be ideal, resulting in a short service life and increased use costs; some solid tires have poor cushioning performance, which affects the driving comfort of the vehicle.

[0004] There is also room for improvement in the materials and manufacturing processes of solid tires. Traditional formulations and processes may be difficult to meet the increasingly high performance requirements, such as a better combination of strength and toughness, and better aging resistance.

[0005] Faced with these problems and challenges, the solid tire field urgently needs an innovative solution that can effectively improve the comprehensive performance of the tire, including grip, strength, wear resistance, cushioning, etc., while optimizing the preparation process to improve production efficiency and product quality. It is in this context that the solid tire and its preparation method of the present invention came into being, aiming to break through the limitations of the existing technology and bring new breakthroughs and progress to the development of solid tires. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the present invention provides a solid tire to solve the above problems.

[0008] (II) Technical solution

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a solid tire, whose structure includes an outer rubber layer, an intermediate reinforcement structure layer and an inner rubber layer, wherein the outer rubber layer has a specific hardness and wear resistance, the intermediate reinforcement structure layer is composed of a high-strength fiber braid, and the inner rubber layer plays a buffering and supporting role.

[0010] As a preferred technical solution of the present invention, the surface of the outer rubber layer is distributed with V-shaped raised patterns to enhance the grip, and the height of the raised patterns is 0.5-2 mm.

[0011] As a preferred technical solution of the present invention, the high-strength fiber braid of the intermediate reinforcement structure layer is braided in a multi-layer cross-weaving manner, and the number of the braided layers is 3-6 layers.

[0012] As a preferred technical solution of the present invention, the outer rubber layer: 35-50 parts of natural rubber, 15-25 parts of styrene-butadiene rubber, 8-15 parts of butadiene rubber, 1.5-4 parts of vulcanizing agent, 0.8-2.5 parts of accelerator, 0.5-1.5 parts of antioxidant, 3-8 parts of softener;

[0013] Middle reinforcement structure layer: high-strength fiber braid is aramid fiber braid or carbon fiber braid;

[0014] Inner rubber layer: 20-40 parts of natural rubber, 10-20 parts of styrene-butadiene rubber, 5-15 parts of butadiene rubber, 1.5-4 parts of vulcanizer, 0.8-2.5 parts of accelerator, 0.5-1.5 parts of antioxidant, and 3-8 parts of softener.

[0015] As a preferred technical solution of the present invention, a plurality of microporous structures are evenly distributed in the inner rubber layer, and the diameter of the micropores is 0.1-0.5 mm.

[0016] As a preferred technical solution of the present invention, the vulcanizing agent is sulfur or insoluble sulfur, the accelerator is tetramethylthiuram disulfide or zinc diethyldithiocarbamate, the antioxidant is N-phenyl-α-aniline or p-phenylenediamine antioxidant, and the softener is cycloalkane oil or aromatic oil.

[0017] As a preferred technical solution of the present invention, the thickness of the outer rubber layer is 3-8 mm, the thickness of the middle reinforcement structure layer is 2-5 mm, and the thickness of the inner rubber layer is 4-10 mm.

[0018] As a preferred technical solution of the present invention, the following steps are included:

[0019] The outer rubber layer (1) and the inner rubber layer are prepared according to the formula, and the respective raw materials are pre-mixed at a pre-mixing temperature of 70-110° C. and a pre-mixing time of 20-50 minutes; and then a secondary mixing is performed, and a nano-scale reinforcing filler, such as nano-silicon dioxide or nano-calcium carbonate, is added during the secondary mixing process to further improve the performance of the rubber layer, and the mixing temperature is 80-120° C. and the mixing time is 30-60 minutes;

[0020] Laying the middle reinforcement structure layer in the mold and pre-treating it, such as plasma treatment or surface coating treatment, to enhance the bonding force between the middle reinforcement structure layer and the rubber layer;

[0021] First pour the outer rubber layer, then pour the inner rubber layer;

[0022] Add vulcanizing agent, accelerator, antioxidant, softener and other additives to carry out segmented vulcanization molding. First, vulcanize at a lower temperature of 110-130℃ for 20-40 minutes, then heat up to 130-150℃ and continue vulcanization for 20-50 minutes. This can make the vulcanization more complete and uniform and reduce internal defects.

[0023] After vulcanization is completed, cooling treatment is carried out, using a gradient cooling method, first quickly cooling for 10-20 minutes, then slowly cooling for 10-20 minutes, and cooling to room temperature to reduce the internal stress generated during the cooling process.

[0024] As a preferred technical solution of the present invention, the mixing temperature of the outer rubber layer and the inner rubber layer is 80-120° C., and the mixing time is 30-60 minutes.

[0025] Compared with the prior art, the present invention provides a solid tire with the following beneficial effects:

[0026] First, through the unique structural design, including the outer rubber layer, the middle reinforcement structure layer and the inner rubber layer, the tire performance is comprehensively improved. The specific hardness and wear resistance of the outer rubber layer, combined with the V-shaped raised patterns on the surface, significantly enhance the tire's grip, ensuring stability and safety in various road conditions.

[0027] The middle reinforcement structure layer adopts high-strength fiber braids, such as aramid fiber or carbon fiber braids, and enhances the overall strength and tensile resistance of the tire by multi-layer cross-weaving, effectively extending the service life of the tire.

[0028] The microporous structure of the inner rubber layer provides good cushioning and support, improving the comfort of the tire.

[0029] In terms of formulation, the carefully formulated rubber materials and additives further optimize the performance of each layer. The rational selection and use of vulcanizers, accelerators, antioxidants and softeners make the rubber layer vulcanized more fully and evenly, reduce internal defects, and improve the aging resistance and flexibility of the rubber.

[0030] Innovations in preparation methods also provide guarantees for tire quality. The addition of nano-scale reinforcing fillers during pre-mixing and secondary mixing improves the performance of the rubber layer. Pretreatment of the intermediate reinforcing structure layer, segmented vulcanization molding, and gradient cooling methods all help to improve the tire's bonding strength and reduce internal stress, thereby ensuring that the tire has excellent overall performance.

[0031] The present invention can produce high-quality solid tires that meet different needs, and has excellent performance in terms of load-bearing capacity, wear resistance, grip, comfort, etc. Compared with the prior art, the present invention has unique innovations in structure, formula and preparation process, and has brought significant progress to the field of solid tires. It has broad application prospects and market potential, and is of great significance for promoting the development of related industries.

[0032] In summary, the solid tire and preparation method thereof of the present invention have outstanding creativity and practicality, set a new benchmark for the tire field, and will bring better usage experience and higher economic benefits to users. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the cross-sectional structure of the intermediate reinforcement structure layer of the present invention;

[0035] Figure 3 This is a schematic diagram of the cross-sectional structure of the inner rubber layer of the present invention;

[0036] Figure 4 The present invention is a schematic diagram of the production process.

[0037] Among them: 1. Outer rubber layer; 2. Middle reinforcement structure layer; 3. Inner rubber layer. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0039] It should be noted that if the embodiments of the invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection required by the invention.

[0041] See also Figure 1-4 :

[0042] Embodiment 1:

[0043] A solid tire comprises an outer rubber layer 1, a middle reinforcement structure layer 2 and an inner rubber layer 3.

[0044] Outer rubber layer 1: 40 parts of natural rubber, 20 parts of styrene-butadiene rubber, 10 parts of butadiene rubber, 2 parts of vulcanizer, 1 part of accelerator, 1 part of antioxidant, and 5 parts of softener. These raw materials are pre-mixed at 90°C for 30 minutes. Then a secondary mixing is carried out at a mixing temperature of 100°C and a mixing time of 40 minutes. Nano-silica is added during the secondary mixing process to further improve the performance of the rubber layer. The thickness of the outer rubber layer 1 is 5 mm, and its surface is distributed with V-shaped raised lines with a height of 1 mm to enhance grip.

[0045] Middle reinforcement structure layer 2: 4 layers of aramid fiber braid with a thickness of 3 mm are used. They are laid in the mold and plasma treated to enhance the bonding force between the middle reinforcement structure layer and the rubber layer.

[0046] Inner rubber layer 3: 30 parts of natural rubber, 15 parts of styrene-butadiene rubber, 10 parts of butadiene rubber, 2 parts of vulcanizer, 1 part of accelerator, 1 part of antioxidant, and 5 parts of softener. The preparation process of the inner rubber layer 3 is similar to that of the outer rubber layer 1. It is pre-mixed at 90°C for 30 minutes, and then re-mixed at 100°C for 40 minutes. Nano-silicon dioxide is added during the process. The thickness of the inner rubber layer 3 is 6mm, and there are microporous structures with a diameter of 0.3mm evenly distributed inside, which play a role in buffering and supporting.

[0047] When preparing the solid tire, first lay the treated middle reinforcement structure layer 2 in the mold, then pour the outer rubber layer 1 rubber material first, and then pour the inner rubber layer 3 rubber material. Then add the vulcanizing agent, accelerator, antioxidant, softener and other additives, first vulcanize at 120°C for 30 minutes, then heat to 140°C and continue vulcanization for 30 minutes, so that the vulcanization is more complete and uniform, and reduce internal defects. After the vulcanization is completed, the cooling treatment is carried out, first quickly cooling for 15 minutes, then slowly cooling for 15 minutes, and cooling to room temperature to reduce the internal stress generated during the cooling process. Among them, the vulcanizing agent is sulfur, the accelerator is tetramethylthiuram disulfide, the antioxidant is N-phenyl-α-aniline, and the softener is cyclohexane oil.

[0048] Embodiment 2:

[0049] A solid tire consists of an outer rubber layer 1, a middle reinforcement structure layer 2 and an inner rubber layer 3.

[0050] Outer rubber layer 1: 35 parts of natural rubber, 15 parts of styrene-butadiene rubber, 8 parts of butadiene rubber, 1.5 parts of vulcanizer, 0.8 parts of accelerator, 0.5 parts of antioxidant, and 3 parts of softener are selected. First, these raw materials are pre-mixed at 70°C for 20 minutes. Then, a secondary mixing is performed at a mixing temperature of 80°C and a mixing time of 30 minutes. Nano calcium carbonate is added during the secondary mixing. The thickness of the outer rubber layer 1 is set to 3mm, and its surface is distributed with V-shaped raised lines with a height of 0.5mm.

[0051] Middle reinforcement structure layer 2: Use 3 layers of carbon fiber braid with a thickness of 2mm. Before laying it in the mold, it is surface coated to enhance the bonding force with the rubber layer.

[0052] Inner rubber layer 3: 20 parts of natural rubber, 10 parts of styrene-butadiene rubber, 5 parts of butadiene rubber, 1.5 parts of vulcanizer, 0.8 parts of accelerator, 0.5 parts of antioxidant, and 3 parts of softener. The preparation method of the inner rubber layer 3 is the same as that of the outer rubber layer 1. It is pre-mixed at 70°C for 20 minutes, and then re-mixed at 80°C for 30 minutes, and nano calcium carbonate is added at the same time. The thickness of the inner rubber layer 3 is 4mm, and there are microporous structures with a diameter of 0.1mm evenly distributed inside.

[0053] When manufacturing the solid tire, first place the treated middle reinforcement structure layer 2 in the mold, then pour the outer rubber layer 1 rubber material first, and then pour the inner rubber layer 3 rubber material. Then add the vulcanizing agent, accelerator, antioxidant, softener and other additives, first vulcanize at 110°C for 20 minutes, then heat to 130°C and continue vulcanization for 20 minutes. After the vulcanization is completed, cool it down, first cool it down quickly for 10 minutes, then cool it down slowly for 10 minutes, until it cools to room temperature. The vulcanizing agent here is insoluble sulfur, the accelerator is zinc diethyldithiocarbamate, the antioxidant is a paraphenylenediamine antioxidant, and the softener is aromatic oil.

[0054] Embodiment 3:

[0055] A solid tire comprises an outer rubber layer 1, a middle reinforcement structure layer 2 and an inner rubber layer 3.

[0056] Outer rubber layer 1: 50 parts of natural rubber, 25 parts of styrene-butadiene rubber, 15 parts of butadiene rubber, 4 parts of vulcanizer, 2.5 parts of accelerator, 1.5 parts of antioxidant, and 8 parts of softener. The above raw materials are pre-mixed at 110°C for 50 minutes. Then, secondary mixing is performed at a mixing temperature of 120°C and a mixing time of 60 minutes. Nano-silicon dioxide is added during the secondary mixing process. The thickness of the outer rubber layer 1 is 8 mm, and its surface is distributed with V-shaped raised lines with a height of 2 mm.

[0057] Middle reinforcement structure layer 2: 6 layers of aramid fiber braid with a thickness of 5 mm. Before being laid in the mold, it is plasma treated to enhance its bonding with the rubber layer.

[0058] Inner rubber layer 3: 40 parts of natural rubber, 20 parts of styrene-butadiene rubber, 15 parts of butadiene rubber, 4 parts of vulcanizer, 2.5 parts of accelerator, 1.5 parts of antioxidant, and 8 parts of softener. The preparation process of the inner rubber layer 3 is the same as that of the outer rubber layer 1. It is pre-mixed at 110°C for 50 minutes, then re-mixed at 120°C for 60 minutes, and nano-silica is added. The thickness of the inner rubber layer 3 is 10 mm, and there are microporous structures with a diameter of 0.5 mm evenly distributed inside.

[0059] The manufacturing process of the solid tire is as follows: first, lay the treated intermediate reinforcement structure layer 2 in the mold, then pour the outer rubber layer 1 rubber material first, and then pour the inner rubber layer 3 rubber material. Then add the vulcanizing agent, accelerator, antioxidant, softener and other additives, first vulcanize at 130°C for 40 minutes, then heat to 150°C and continue vulcanization for 50 minutes. After the vulcanization is completed, cool it down, first cool it down quickly for 20 minutes, then cool it down slowly for 20 minutes, and cool it down to room temperature. In this process, the vulcanizing agent is sulfur, the accelerator is tetramethylthiuram disulfide, the antioxidant is N-phenyl-α-aniline, and the softener is cyclohexane oil.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0061] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0062] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A solid tire, comprising an outer rubber layer (1), an intermediate reinforcing structure layer (2) and an inner rubber layer (3), wherein the outer rubber layer (1) has a specific hardness and wear resistance, the intermediate reinforcing structure layer (2) is composed of a high-strength fiber braid, and the inner rubber layer (3) plays a buffering and supporting role.

2. A solid tire according to claim 1, characterized in that: The surface of the outer rubber layer (1) is provided with V-shaped raised patterns to enhance the grip, and the height of the raised patterns is 0.5-2 mm.

3. A solid tire according to claim 1, characterized in that: The high-strength fiber braid of the intermediate reinforcement structure layer (2) is braided in a multi-layer cross-weaving manner, and the number of braided layers is 3-6.

4. A preparation formula of a solid tire is as follows, characterized in that: Outer rubber layer (1): 35-50 parts of natural rubber, 15-25 parts of styrene-butadiene rubber, 8-15 parts of butadiene rubber, 1.5-4 parts of vulcanizing agent, 0.8-2.5 parts of accelerator, 0.5-1.5 parts of antioxidant, and 3-8 parts of softener; Middle reinforcement structure layer (2): the high-strength fiber braid is aramid fiber braid or carbon fiber braid; Inner rubber layer (3): 20-40 parts of natural rubber, 10-20 parts of styrene-butadiene rubber, 5-15 parts of butadiene rubber, 1.5-4 parts of vulcanizing agent, 0.8-2.5 parts of accelerator, 0.5-1.5 parts of antioxidant, and 3-8 parts of softener.

5. A solid tire according to claim 1, characterized in that: A plurality of microporous structures are evenly distributed in the inner rubber layer (3), and the diameter of the micropores is 0.1-0.5 mm.

6. A solid tire according to claim 4, characterized in that: The vulcanizing agent is sulfur or insoluble sulfur, the accelerator is tetramethylthiuram disulfide or zinc diethyldithiocarbamate, the antioxidant is N-phenyl-α-aniline or p-phenylenediamine antioxidant, and the softener is cycloalkane oil or aromatic oil.

7. A solid tire according to claim 1, characterized in that: The thickness of the outer rubber layer (1) is 3-8 mm, the thickness of the middle reinforcement structure layer (2) is 2-5 mm, and the thickness of the inner rubber layer (3) is 4-10 mm.

8. A method for preparing a solid tire as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: The outer rubber layer (1) and the inner rubber layer (3) are prepared according to the formula, and the respective raw materials are pre-mixed at a pre-mixing temperature of 70-110° C. and a pre-mixing time of 20-50 minutes; and then a secondary mixing is performed, and a nano-scale reinforcing filler, such as nano-silicon dioxide or nano-calcium carbonate, is added during the secondary mixing process to further improve the performance of the rubber layer, and the mixing temperature is 80-120° C. and the mixing time is 30-60 minutes; Laying the middle reinforcement structure layer (2) in a mold and pre-treating it, such as plasma treatment or surface coating treatment, to enhance the bonding force between the middle reinforcement structure layer and the rubber layer; First pour the rubber material of the outer rubber layer (1), and then pour the rubber material of the inner rubber layer (3); Add vulcanizing agent, accelerator, antioxidant, softener and other additives to carry out segmented vulcanization molding. First, vulcanize at a lower temperature of 110-130℃ for 20-40 minutes, then heat up to 130-150℃ and continue vulcanization for 20-50 minutes. This can make the vulcanization more complete and uniform and reduce internal defects. After vulcanization is completed, cooling treatment is carried out, using a gradient cooling method, first quickly cooling for 10-20 minutes, then slowly cooling for 10-20 minutes, and cooling to room temperature to reduce the internal stress generated during the cooling process.

9. A solid tire according to claim 8, characterized in that: During the mixing process, the mixing temperature of the outer rubber layer compound (1) and the inner rubber layer compound (3) is 80-120° C., and the mixing time is 30-60 minutes.

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