Plastic granules are not a special type of polymer that can be found in different categories! It is a special form of polymer that is obtained in granular form in the petrochemical industry and is used in applications such as smelting and shaping. In addition, it is used as one of the plastic raw materials. These parts start from the process of entering the polymer into the granulating machine and continue with the melting of the polymer. As the process progresses, the molten polymer is repeatedly cut off. In the continuation of this PETROPROVIDERS article, join us to show you the important methods of producing plastic granules.

How are granules and plastics produced?

granules and plastics production

granules and plastics production

It can be said with certainty that any polymer can turn into plastic granules. This is usually the simplest form of production of this product, which is usually based on application, viscosity, and polymerization. However, this method can also be complex, depending on the situation, resulting in the production of a polymer in powder or liquid form.

In the production of a polymer, the main goal can be considered based on obtaining a substance with desirable properties. Therefore, these properties and their control during the polymer process depend on many factors. These factors, which have many variations, start from temperature and even go up to pressure, type of catalyst, etc.

In this way, a polymer that has been melted and formed once will have better properties than recycled polymers that have been melted over and over again. Some polymers retain their original properties during several melting and forming processes.

For example, “PVC or polyvinyl chloride” is one of these polymers that has many applications in global industries. This polymer is used directly in profiles and windows, tablecloths, sheets, cables and appliances, and retains its properties even after recycling.

Granules are small plastic balls that are poured into various shaping devices and come in a variety of shapes. These modes can be used in different industries depending on the need, and this is only part of the miracle of this product. For example, it is interesting to know that the system of plastic forming machines is made in such a way that the raw materials enter it in a ball and pieces.

Therefore, plastic waste, which is ground and sheet form, cannot be placed at the entrance of the machine and can cause problems such as uniformity of the mix. For this reason, most manufacturers prefer to receive their input materials in the form of granules to save on their purchases.

Lines of producing plastic granules

Lines of producing plastic granules

Lines of producing plastic granules

In the first line, the string production

The first method of producing plastic granules is in the form of filaments. Since the production of this type of production machine is relatively simple; Used in different countries. In this method, pieces of molten plastic pass through the extruder and exit the filters in a stringy manner.

These materials then pass through a pool of water for the cooling process and are directed to a plastic mill to dry after processing. Of course, this type is not used to produce new materials; Because most of them have sharp edges and these droughts reduce the final output of the products.

Of course, another problem with these devices is that they require a full-time operator to control them. Because plastic lines are constantly being cut, it is best for a workforce to constantly monitor and control them.

The second line of granule production, dry method

In the second method of granule production, the crushed plastic granules, after performing the melting process in the granulating machine, pass through a strainer with small holes. As it exits the strainer, a blade cuts the pieces at very high speeds, directing them toward a strong sucker, and the high speed of this transfer causes the pieces to dry out.

Eventually, after entering a larger tank, the pressure drop causes the heavier grains to fall to the bottom of the tank and air to escape from above them.

Perhaps the biggest problem with this method is the construction of its production machines, which in principle require very high precision and are expensive. Of course, the products of these devices are more similar to petrochemical production materials and their stability is also good.

What are the features of a granulator?

The removal of manufactured materials is usually the last step of the plastic recycling machine, which is done by the granulating machine. The most important feature of these lines is that the extractors usually receive the same material. This also raises one of the most important concerns of any production line, which is the incompatibility of the drying and exit process.

In this way, if an error occurs during the cleaning or drying phase, the extractor will not function properly. Therefore, to complete a production line, the appropriate characteristics for an ideal extruder must be considered, which can be summarized as follows:

  • Strong vacuum pump to increase the effect of gas extraction, which will have a better output by increasing the number of dischargers.
  • Powerful plate changer to compensate for improper washing of some parts
  • Use single-screw extruders or single-pump, which will have better power and lower maintenance costs.

Finally, the extruder must be able to completely remove these gases from a working environment. Constant exposure of the lungs to these chemicals and gases can be fatal. From a hygienic point of view, a device with the best possible suction in this vacuum system is preferred.

Summary of important methods of producing plastic granules

In this article, PETROPROVIDERS, we have told you about different methods of producing plastic granules. These granules are used in various industries; Because they have good features and are affordable for use in various industries. The use of these granules reduces the need for high temperatures in the test and factory environment.

It should be noted that the use of these granules must be done by standard conditions. This will reduce the damage to human health and the environment. Unlike chemicals such as phthalic anhydride, granules do not cause much harm to human health.

It should be noted that there are other granules in the industry; For example, the types of polystyrene granules that are available in EPS grade, HIPS grade, GPPS grade, and XPS grade. These granules also have many uses.

What do you think about important methods of producing plastic granules? Is it appropriate to use these materials to produce different products in different industries? Are these materials cost-effective for producing different parts? In the comments section, you can ask your questions from our expert team.


What are the most important applications of plastic granules?

All over the world, these granules are used to make plastic chairs and tables.

An important question; How are granules produced?

These materials are produced using natural gases or plants and oils. There are two general methods for producing granules: string production and dry method

What are the benefits of using granules?

These materials have various applications in global industries; Because they are safe, secure and inexpensive, and easily produced.

What is the safest plastic in the world?

Polypropylene is one of the most important polymers in the world, which is known as the safest plastic.