Rubber composition prepared by recycling waste rubber and preparation method of rubber composition

Abstract

The invention discloses a rubber composition for recycling waste rubber and a preparation method thereof. The preparation method comprises the following specific steps: S1, collecting waste tires; s2, cleaning the tire; s3, crushing the tire; s4, particle surface treatment: removing steel wires, cleaning the surface, and performing modification treatment; s5, bonding the particles; s6, mold processing and shaping; s7, finishing is conducted; and S8, detecting. Waste tires are used as main raw materials, the waste tires are crushed into 4-11 small particles by a machine, the particles are subjected to surface treatment to improve a surface porous rough structure, the particles are subjected to adhesive treatment according to a specific proportion, the surfaces of the particles are wrapped, integration is formed through mold processing and shaping treatment, and the novel process rubber product is obtained. The utilization rate of tire recycling is achieved to the maximum extent, no waste is generated, and air or the environment cannot be polluted.

Description

Technical Field

[0001] The invention relates to the technical field of rubber recycling, and in particular to a rubber composition for recycling waste rubber and a preparation method thereof. Background Art

[0002] With the development of society, waste rubber will cause serious harm to the environment if it is not handled properly. It is difficult to degrade naturally. When piled up into mountains, it not only occupies a large amount of land resources, but also may become a breeding ground for mosquitoes and flies, increasing the risk of disease transmission. During improper incineration, waste rubber will release toxic gases such as dioxins and heavy metals, polluting the air and threatening human health. At the same time, the chemicals in rubber seep into the soil and water, causing soil infertility and water resource pollution. Therefore, scientifically and rationally recycling waste tires to reduce their negative impact on the environment has become an important issue in environmental protection.

[0003] The current status of waste rubber treatment presents a diversified trend, which is mainly divided into two categories: physical recycling and chemical recycling. Physical recycling is the most common treatment method at present, which includes two methods: rubber retreading and material recycling. Tire retreading technology can repair and reinforce worn tires to extend their service life. This method is particularly common in the field of commercial transportation. Material recycling is to crush waste tires into rubber particles or rubber powder through mechanical processing, which is used to produce rubber products, sports field paving, building materials, etc., realizing the reuse of resources. Chemical recycling technology is more advanced. It involves processes such as pyrolysis and gasification, which can convert waste tires into chemical raw materials such as oil, gas, and carbon black. Pyrolysis technology decomposes tires into oil, gas, and carbon black in a high-temperature oxygen-free environment. These products can be further used in energy production and the chemical industry. Gasification technology converts tires into synthetic gas at a higher temperature. This gas can be used for power generation or as a chemical raw material.

[0004] However, despite the existence of a variety of treatment methods, the treatment of waste tires still faces challenges. Globally, illegal dumping and improper disposal of waste tires are still common, and the lack of an effective supervision and recycling system has led to serious environmental pollution problems. In addition, factors such as the cost-effectiveness of treatment technologies, large equipment investment, and complex operations also limit the large-scale application of these technologies.

[0005] The existing physical aspects of tire recycling are only tire retreading and material recycling, especially material recycling, which crushes waste tires into particles or rubber powder through mechanical processing, with a high reusability rate, but the key waste is still a source of pollution. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a rubber composition for recycling waste rubber and a preparation method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for preparing a rubber composition for recycling waste rubber comprises the following specific steps:

[0009] S1: Collection of waste tires: Collection of waste tires as the main raw material, which usually come from car repair stations, tire replacement points or tire recycling stations;

[0010] S2: Tire cleaning: usually use a high-pressure water gun or chemical cleaning agent to remove dirt, oil and other impurities on the tire surface;

[0011] S3: Tire crushing: First use a tire crusher or a strip cutter to cut the tire into larger pieces or larger rubber strips, and then send the large pieces or rubber strips into a grinder to crush them into small particles or rubber strips of 4-11 mm;

[0012] S4: Surface treatment of particles:

[0013] S41: Steel wire removal: Use magnetic separation equipment to remove metal steel wire from tire particles;

[0014] S42: Surface cleaning: Use sandblasting, chemical treatment or heat treatment to remove impurities and dust on the surface of particles and improve the surface structure of particles;

[0015] S43: Modification treatment: Oxidation or other surface modification techniques are used to improve the porous and rough surface structure of the particles to enhance the bonding force with the adhesive;

[0016] S5: Bonding of particles: Prepare adhesives as needed. Commonly used adhesives include rubber glue, polyurethane glue, etc. Mix the particles and adhesives fully according to a specific ratio to ensure that the surface of each particle is covered with adhesive. Treat the particles with adhesives;

[0017] S6: Mold processing and shaping: Design a suitable mold. The mold is designed according to the shape and size of the final product. The treated particles and the binder mixture are placed in the mold, and mold processing and shaping treatment is performed at high temperature and high pressure. The mold is cooled in the mold to form an integral whole, and then demolded from the mold;

[0018] S7: Finishing: Edge trimming, grinding and surface treatment of products to ensure that product quality and appearance meet requirements and obtain new process rubber products;

[0019] S8: Inspection: Conduct quality inspection on new process rubber products to check whether the product's size, strength, durability, etc. meet the standards.

[0020] As a further technical solution of the present invention, in S1, the waste tires usually come from a car repair station, a tire replacement point or a tire recycling station.

[0021] As a further technical solution of the present invention, in S2, the tire is usually cleaned using a high-pressure water gun or a chemical cleaning agent.

[0022] As a further technical solution of the present invention, in S42, the particle surface is cleaned by sandblasting, chemical treatment or heat treatment.

[0023] As a further technical solution of the present invention, in S5, commonly used adhesives include rubber glue, polyurethane glue, etc.

[0024] As a further technical solution of the present invention, in S6, the mold is designed according to the shape and size of the final product.

[0025] As a further technical solution of the present invention, in S8, the quality inspection includes checking whether the size, strength, durability, etc. of the product meet the standards.

[0026] A rubber composition for recycling waste rubber comprises the following raw materials: waste tires crushed into 4-11 small particles and an adhesive.

[0027] The beneficial effects of the present invention are as follows: waste tires are used as the main raw materials, which are crushed into 4-11 small particles by a machine, the particles are surface treated to improve the surface porous rough structure, adhesive treatment is performed according to a specific ratio, the particle surface is wrapped, and mold processing and shaping treatment are performed to form an integral whole to obtain a new process rubber product, which solves the utilization rate of tire recycling to the greatest extent, does not generate waste, and does not pollute the air or the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention provides a flow chart of a method for preparing a rubber composition for recycling waste rubber. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] Please see attached Figure 1 A method for preparing a rubber composition for recycling waste rubber comprises the following specific steps:

[0031] S1: Collection of waste tires: Collection of waste tires as the main raw material;

[0032] S2: Tire cleaning: remove dirt, oil and other impurities from the tire surface;

[0033] S3: Tire crushing: First use a tire crusher or a strip cutter to cut the tire into larger pieces or larger rubber strips, and then send the large pieces or rubber strips into a grinder to crush them into small particles or rubber strips of 4-11 mm;

[0034] S4: Surface treatment of particles:

[0035] S41: Steel wire removal: Use magnetic separation equipment to remove metal steel wire from tire particles;

[0036] S42: Surface cleaning: remove impurities and dust on the surface of particles and improve the surface structure of particles;

[0037] S43: Modification treatment: Oxidation or other surface modification techniques are used to improve the porous and rough surface structure of the particles to enhance the bonding force with the adhesive;

[0038] S5: Bonding of particles: Prepare adhesive as needed, mix the particles and adhesive thoroughly according to a specific ratio, ensure that the surface of each particle is coated with adhesive, and treat the particles with adhesive;

[0039] S6: Mold processing and shaping: Design a suitable mold, put the treated particles and binder mixture into the mold, perform mold processing and shaping treatment at high temperature and high pressure, cool in the mold to form an integral whole, and then demold from the mold;

[0040] S7: Finishing: Edge trimming, grinding and surface treatment of products to ensure that product quality and appearance meet requirements and obtain new process rubber products;

[0041] S8: Inspection: Conduct quality inspection on new process rubber products.

[0042] A rubber composition for recycling waste rubber comprises the following raw materials: waste tires crushed into 4-11 small particles and an adhesive.

[0043] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: waste tires are used as the main raw materials, which are crushed into 4-11 small particles by a machine, the particles are surface treated to improve the surface porous rough structure, the adhesive is treated according to a specific ratio, the surface of the particles is wrapped, and the particles are integrated through mold processing and shaping to obtain new process rubber products, which solves the utilization rate of tire recycling to the greatest extent, does not generate waste, and does not pollute the air or the environment.

[0044] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0045] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing a rubber composition for recycling waste rubber, characterized in that: The specific steps include: S1: Collection of waste tires: Collection of waste tires as the main raw material; S2: Tire cleaning: remove dirt, oil and other impurities from the tire surface; S3: Tire crushing: First use a tire crusher or a strip cutter to cut the tire into larger pieces or larger rubber strips, and then send the large pieces or rubber strips into a grinder to crush them into small particles or rubber strips of 4-11 mm; S4: Surface treatment of particles: S41: Steel wire removal: Use magnetic separation equipment to remove metal steel wire from tire particles; S42: Surface cleaning: remove impurities and dust on the surface of particles and improve the surface structure of particles; S43: Modification treatment: Oxidation or other surface modification techniques are used to improve the porous and rough surface structure of the particles to enhance the bonding force with the adhesive; S5: Bonding of particles: Prepare adhesive as needed, mix the particles and adhesive thoroughly according to a specific ratio, ensure that the surface of each particle is coated with adhesive, and treat the particles with adhesive; S6: Mold processing and shaping: Design a suitable mold, put the treated particles and binder mixture into the mold, perform mold processing and shaping treatment at high temperature and high pressure, cool in the mold to form an integral whole, and then demold from the mold; S7: Finishing: Edge trimming, grinding and surface treatment of products to ensure that product quality and appearance meet requirements and obtain new process rubber products; S8: Inspection: Conduct quality inspection on new process rubber products.

2. The method for preparing a rubber composition for recycling waste rubber according to claim 1, characterized in that: In S1, the waste tires usually come from a car repair station, a tire replacement point or a tire recycling station.

3. The method for preparing a rubber composition for recycling waste rubber according to claim 1, characterized in that: In S2, the tire is usually cleaned using a high-pressure water gun or a chemical cleaning agent.

4. The method for preparing a rubber composition for recycling waste rubber according to claim 1, characterized in that: In S42, the particle surface is cleaned by sandblasting, chemical treatment or heat treatment.

5. The method for preparing a rubber composition for recycling waste rubber according to claim 1, characterized in that: In S5, commonly used adhesives include rubber glue, polyurethane glue, etc.

6. The method for preparing a rubber composition for recycling waste rubber according to claim 1, characterized in that: In S6, the mold is designed according to the shape and size of the final product.

7. The method for preparing a rubber composition for recycling waste rubber according to claim 1, characterized in that: In S8, the quality inspection includes checking whether the size, strength, durability, etc. of the product meet the standards.

8. A rubber composition for recycling waste rubber prepared by the preparation method according to claims 1-7, characterized in that: The raw materials include: waste tires crushed into 4-11 small particles and adhesives.

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