PolyStyrene grades are usually divided into 4 types. GPPS polystyrene, HIPS polystyrene, XPS polystyrene, and EPS polystyrene. PolyStyrene grades vary depending on the production method. If butadiene is added to these materials, they become very strong. In addition, this material makes polystyrene much more durable and stable.

This is also called rubber-enhanced polystyrene. Typically, the styrene monomer in PolyStyrene grades is about 88 to 97 percent. In this article from PetroProviders, join us to introduce you to different grades of PS.

How to produce PolyStyrene grades?

EPS Grade

EPS Grade

There are different methods for producing different types of polystyrene models. For example, suspension, block, solution, and emulsion methods are used to make polystyrene.

One of the most common methods for making PolyStyrene grades is to use the bulk method. We will explain this method in full in the continuation of this article.

In the solution method, the monomers dissolve in a solution (eg, ethylene benzene); Then the polymerization process is performed on it.

In the suspension method, the monomers are dissolved in water and converted into a suspension.

Introduction of the bulk method for producing PolyStyrene grades

To perform the bulk method, you can use two methods, Continuous or Batch. Using the Batch method, different grades of polystyrene can be made. This method has high efficiency and can be used to produce polystyrene. In this method, the reactant is returned to the reactor after consumption and reused.

There are several ways to generate PolyStyrene grades. For example, to produce HIPS, more butadiene must be added to the polystyrene monomer. To make EPS, a substance must be added to increase its volume.

Various applications of PolyStyrene

Polystyrenes are made in various models. This material is used for food packaging, making polystyrene films, making transparent plastics, and various toys. Polystyrenes are also used to make cosmetics.

Polystyrene is used to make refrigerator strips, disposable tableware, shock and heat insulation, artificial vases, and photographic equipment. This material is lightweight and cheap.

Types of PS grades

As mentioned, there are several ways to build different PS models. These grades are generally divided into 4 categories:

General Purpose polystyrene grade

For the first time, the German company Farben produced this polystyrene as an electronic insulator. It is also known as a thermoplastic polymer. Since then, GPPS has become one of the most popular plastics in the world. This material is very transparent and inexpensive. In addition, it is easily produced in various forms but has little impact resistance. GPPS grade is used to make disposable tableware, toys, sports and electronics, radios, and watches.

Extruded grade of polystyrene



In these grades, molten polystyrene compounds are placed inside the mold. These materials are then injected into the mold with expanding gas. This process allows the polystyrene to arrive regularly. This grade of polystyrene is very popular and is used in various industries.

Expanded polystyrene grade

This polystyrene is one of the most famous polystyrenes in the world. In the production of EPS, the alkyl gasoline compound is removed from the reaction. Then, this compound loses its water and gains a lot of volumes. After that, the particle size increases and its weight becomes lighter. This makes the material very impact-resistant.

EPS polystyrene is used to make building molds, ionolithic blocks, and insulation.

High impact grade polystyrene

This grade is one of the best polystyrene grades! This substance has a lot of butadiene in its composition during production. This grade, after production, has very high impact resistance. HIPS is translucent and, unlike GPPS, very resistant. It is recyclable and can be easily produced and used.

HIPS is used to make a variety of plastics. In addition, it is used to make building insulation, disposable containers, plastic molds, medical supplies, medicine containers, and bacterial culture plates.

Summary of the introduction of PolyStyrene grades

In this article from PetroProviders, we reviewed the types of PolyStyrene grades. This popular material is usually produced in 4 different grades. These grades are XPS grade, GPPS grade, HIPS grade, and EPS grade. In general, Batch and Continuous methods are used to make polystyrenes. The batch method is usually used to make different polystyrenes.

The applications of PolyStyrene grades are very diverse. This material is used to make plastic devices in the medical and automotive industries. What do you think about PolyStyrene grades? Is this substance harmful to human health? In the comments, tell us how much you use polystyrene in your daily life. If you have questions about polystyrenes and how to produce them and buy polystyrenes, ask us and our experts. You can easily contact us or email us.