PS foam is a white substance that is the product of the styrene monomer reaction. PolyStyrene foam was first discovered in 1839. This substance is one of the most popular chemicals and is divided into 4 different types.

Types of PS foams include: General Purpose polystyrene foam, high impact polystyrene foam, expanded polystyrene foam, and extruded polystyrene foam. These thermoplastic materials are lightweight and have good impact resistance. In addition, they are resistant to heat. In the continuation of this article, join us to introduce you to PS foam.

Production of polystyrene foams for the first time in the world

PolyStyrene Foam Sheets

PolyStyrene Foam Sheets

PolyStyrene foam was first discovered in 1839. These materials, which are made of styrene monomer, after combining with other materials, are transformed into different products. For the first time, in 1943, Dow was able to extract styrene and use it to make a variety of products. After that, the technology of producing polystyrene products developed. As of now, most plastic accessories are made of polystyrene. These materials are impact-resistant and inexpensive.

In 1950, PolyStyrene foam was first mass-produced. After that, the development of technology for the production of polystyrene materials grew greatly. Polystyrene has been used in various industries for more than 70 years. For example, PS is used to insulate buildings and make medical devices. In the continuation of this article, we will introduce the types of PS foam.

Full introduction of PS foam types

In general, there are 4 types of foam in the world of polystyrene! These polystyrenes have unique properties and their applications are various. Types of PS foam are:

Extruded polystyrene foam or XPS

One of the most important polystyrene foams is XPS. This foam is used in construction and insulation. The shape of this material is in the form of solid crystals made of styrene monomers. This material is impact resistant and heat-insulating; For this reason, XPS foams are used in construction.

XPS production method: After heating and melting polystyrene, it is inserted into the mold by injection pressure. At this point, the polystyrene is completely melted and molded. After that, the device cools down and our XPS foam is ready.

This foam is water insulating and well resistant to moisture. In addition, since the XPS foam structure is regular and without cavities, it can also be used as a floor. XPS foams can also be used to build large warehouses.

General Purpose or GPPS polystyrene foam

PolyStyrene Foam in packaging

PolyStyrene Foam in packaging

As the name implies, this foam is used for general purposes. This material is very transparent but not impact resistant. In addition, this material has dielectric properties and is very suitable for electrical insulation.

This material is known as crystal in the polystyrene market. The applications of this PolyStyrene foam are very wide. It is used to make toys, sound insulation, medical devices, and disposable tableware. This material is made of styrene monomer and because it has no other composition, it is transparent and not impact resistant.

High Impact polystyrene foam or HIPS

Unlike GPPS foam, this foam has a semi-transparent appearance and more impact resistance. Butadiene is used in the production stages of this PS foam. Butadiene reacts 5 to 10 percent more. Butadiene is a substance that is very resistant to impact. So this property of butadiene also affects HIPS.

HIPS foam is used in various industries. This foam is used to make sports equipment, building insulation, refrigerators and freezers, home appliances, and disposable tableware. In addition, high-impact foam is used to produce durable medical devices such as surgical trays and medicine containers.

Expanded polystyrene foam or EPS

One of the most popular polystyrene foams is EPS foam. This foam is made in a very modern way. To make it, they use the method of removing excess reagent to give more styrene polymers. After the excess reactant is removed from the compound, the substance forms and is commonly known as ionolite.

It is usually white and used in construction. This material withstands the heat of fire for about 20 minutes. But then it shrinks and loses its volume. So one of the disadvantages of EPS foam is its low fire resistance.

It should be noted that this PolyStyrene foam is widely used in construction. We have all seen ionolithic blocks. These blocks are lightweight and easy to use. Due to the high volume of EPS blocks, the costs of concrete and building construction will also be lower. In addition, this PS foam can be used to insulate the roof and floor of the building.

EPS is the best polystyrene for insulating refrigerator appliances in factories. This material is produced in different dimensions and designs. By using expanded polystyrene blocks, the dead load of the building is reduced. So the building is also resistant to earthquakes.

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