We have to say about the reclaim process reclamation refers to the processes by which cooked rubber is first pulverized, then separated from impurities such as fibers and metals, thus becoming a material that can be mixed with other raw rubbers and can be establish a new molecular bond. The product of this set of processes is called recycled rubber or recycled rubber.

Advantages and disadvantages of rubber reclaim process

We have to say about the reclaim process Although recycling rubber is not the only way to reuse worn tires and waste, especially car tires, it currently seems to be the most useful and complete way. Its product is a raw material that in addition to the properties of raw rubber, also has soot and oil. These two factors make recycled rubber easier and faster to process than raw rubber. However, recycled rubber cannot be used alone in rubber product mixes and must be used in conjunction with other raw rubbers.

We have to say about the reclaim process raw rubbers consisting of long, branched polymer molecules contain a large number of double bonds. During cooking, some of these double bonds form a new bond with the curing agent (e.g. sulfur), which together form a three-dimensional network. The use of recycled rubber as a raw material in the rubber industry has the following advantages:

- Prevent waste and increase waste

- Relatively reasonable price

- Easy and fast processability

- Short mixing time and thus reducing the consumption of electrical energy in the mixing process

 - Short-term roasting, fast cooking and thus reducing heat energy consumption in the cooking process

- Low flexibility (low thermoplastic)

- Inflammation, low shrinkage and shrinkage

-Minimum return

- Very useful life of the production part

We have to say about the reclaim process this process also has disadvantages, which include:

-Production of purely black products undermines many mechanical properties of rubber such as tensile stress, stiffness and abrasion resistance

- Ability to absorb moisture (very low)

We have to say about the reclaim process Tire reclamation can be used in most rubber production mixes. The amount of consumption depends on the desired quality of the product. The more important the mechanical properties, the lower the percentage of recycled rubber consumption and the higher the cost of the product, the higher the percentage of consumption. In general, the amount of general consumption depends on the daily price of raw rubber.

Rubber reclamation technology

Rubber reclamation and recovery of rubber from cooked rubber is done in three steps, which are:

1. Powdering and purifying

2. Rubber vulcanization

3. Refining

We have to say about the reclaim process Powdering and purification can be done in completely different ways. In addition to theoretical methods, there are 9 methods for vulcanization. Refining is almost the same in all Kaupu recovery units. The only difference is in the arrangement of the devices. Therefore, by combining the steps of different units can be designed.

Considering that tires make up the largest volume of used tires, we will continue to discuss tire and recycling tires.

Step One Reclaim: Powdering and Purifying

We have to say about the reclaim process in the first stage of reclamation, powdering and purification is done. Recently, according to a method registered in Germany, liquid nitrogen is used to pulverize and separate rubber impurities, especially tires. In this method, the temperature of the rubber is reduced to a less than the glass transition temperature. At this temperature, the rubber becomes glass and is easily crushed by impact. In this way, the crown wire and fibers and other impurities that are not crushed and powdered, are easily separated from the rubber particles.

We have to say about the reclaim process the simplicity of this method has caused the rubber waste trucks equipped with the aforementioned units to collect the tires in the city and turn them into powder on the spot. Then transport the much smaller volumes of rubber powder to the vulcanization units. This saves a lot of tire shipping costs for workshop owners in the reclaim process. However, this method, despite being cheaper, is not a suitable method for recycling due to the problems that exist in terms of liquid nitrogen preparation in Iran and the better applications that exist for this material.

We have to say about the reclaim process An old method that is more appropriate to the current situation in our country includes the use of tire cutting machines, jaw and rotary mills for pulverization, the use of crown and sieve cutting machines and magnetic tape to separate impurities. It is important to know that rubber recycling is a very specialized process

Step Two Reclaim: rubber vulcanization

We have to say about the reclaim process Volcano means breaking the bond of the rubber network and turning it into recycled rubber. In fact, this is the main stage of rubber reclamation. In rubber recovery, the sulfur bonds are practically not broken, but some of the remaining bonds in the rubber polymer itself are broken. Therefore, instead of vulcanizing, it is better to use the word polymerization.

We have to say about the reclaim process So far, a lot of research has been done on the vulcanization of rubber in the reclamation process and several methods have been proposed. Because vulcanization is in fact the main stage of reclamation and recycling of rubber. Practical recycling methods currently used in industry are divided into three categories:

1. Digest methods

2. Mechanical methods

3. Steam methods

We have to say about the reclaim process Digest methods, which are performed in three ways: acidic, alkaline and neutral, although they are still widely used, are gradually disappearing from the industry. In these methods, it is not necessary to purify the rubber powder, but it is necessary to wash the product after vulcanization. Recycled rubber from these methods is not very good.

We have to say about the reclaim process Mechanical recovery of rubber in the reclamation process is done by one of the two methods of reclamator or Benbury-Lancaster. These methods, despite their excellent results so far, are not widely used due to the high cost of the devices.

We have to say about the reclaim process Steam methods have a special role in the reclamation industry. Of the four main methods of steam, two methods require hot steam, which are less used due to the problems of providing this type of steam. In the other two methods, the use of saturated steam, one based on the use of a simple heater and the other is the same, only by installing moving pedals inside the heater and using an external motor to rotate the heater itself, defects due to non-uniformity are eliminated. Has been.

We have to say about the reclaim process in Iran, the use of a simple heater is recommended. First of all, most units of the recycling process or the production of recycled rubber benefit from this method. Temperature The simplicity of this method makes the work easier.

Step Three Reclaim: refinement

We have to say about the reclaim process in the reclamation process, although after the vulcanization, the rubber molecules are broken and recycled rubber is obtained, but the reclamation operation is not done well and is not complete until refinement and refining is done. During these steps, the remaining large molecules are broken down and the remaining impurities are separated as much as possible.

In principle, this operation consists of two stages of refining and one stage of refining. But the arrangement of devices in different workshops varies depending on the opinion of experts. Some reclaim process experts believe that this stage requires two stages of refining and one stage of refining to get the best possible result for recycled rubber.

We have to say about the reclaim process the first and second stage refiners work almost identically. Each of these two devices has two rollers that the surface of the rollers is well polished and also has a coating. Although these devices are very similar to milling machines, they differ from ordinary milling machines in the difference between the diameters of the front and rear hubs. This difference, in addition to the properties due to the polished surface and the distance between the two rollers, causes a high coefficient of friction for these devices.

We have to say about the reclaim process the recirculation filter or strainer is quite similar to the extruder. With the difference that its design is much more accurate and the distance between the screw and its body is less. In addition, there is a very fine-grained steel mesh in the outlet of this device. In addition to separating wood particles, metals and other such impurities, the grid also breaks down the remaining large molecules. This greatly increases the quality of the final product. To protect the net, a steel window is also placed behind it, which increases its strength. The grinder is very similar to a regular meat grinder.