High Impact polystyrene, abbreviated as HIPS, is one of the most popular thermoplastics in the world. The uses of this polystyrene are very diverse and you see this material in your daily life. Polystyrene is a flexible plastic that is used in the manufacture of various products.

For example, glasses in your hand and food packaging containers are made of polystyrene. If you do not know what High Impact polystyrene is, and you also do not know its uses, read on.

HIPS is a modified form of polystyrene



Polystyrenes have various uses. These materials are rigid and are used in packaging and laboratory applications. These materials are reactive and new products can be produced by adding different materials. For example, you can see polystyrene in the manufacture of auto parts, medical equipment, and toys. Polystyrene organizes the products around us and holds them together in a special way.

Introducing different types of polystyrene grades

Polystyrenes are produced in different grades. Each of these grades has a variety of uses and you can buy one of them according to your needs.

1. High Impact polystyrene or HIPS

The polystyrene we are going to examine in this article is HIPS. This polystyrene has a high resistance and polystyrene has been modified. Making High Impact polystyrene is easy! By adding rubber to polystyrene, HIPS can be made. It is very durable and is used in the manufacture of various products.

2. General Purpose polystyrene or GPPS

This polystyrene, also called crystalline, has a general application. It is very transparent and fragile! Therefore, it can not be used for various purposes. It is made during the mono-styrene polymerization reaction. It is usually colorless and is used in the manufacture of soft appliances.

3. Expanded polystyrene or EPS

A type of polystyrene that is in the form of foam and is called “ionolite”. This polystyrene can be used in various industries. For example, EPS is used in construction and roof and floor insulation.

4. Extruded polystyrene or XPS

Another type of extruded polystyrene. This product also has various uses that will be explained in detail in the following articles.

5. Polystyrene foam

The most widely used type of polystyrene. It is present in more than 90% of the devices around us! Polystyrene foam is used in food packaging, in the manufacture of auto parts, in the insulation of home appliances, and the manufacture of corrugated boards due to its interesting properties.

What thermoplastic is right for me?

Choosing the right thermoplastic can be a big challenge for you. Especially if you are new to the industry. In general, choosing the right polystyrene depends on your needs. You can research different polystyrenes or you can contact our experts. We are proud to have received useful information about polystyrenes and their applications. You can contact us and get free expert advice.

Interesting features of High Impact polystyrene



HIPS is a very interesting chemical! This material has various uses and as polystyrene, it can meet your needs. It is impact resistant and has good resistance to various pressures. This polystyrene is very flexible and after heating and cooling, it turns into your desired shape again. So in general, High Impact polystyrene is well compatible with thermoforming reactions. In addition to these factors, other factors have made HIPS one of the most popular polystyrenes in the world. Introducing the features of this polystyrene in full:

1. High Impact polystyrene is an amorphous polymer.

In general, polymers have two morphological states: amorphous (transparent) and semi-crystalline. The building chains contained in these materials, if they are regular, are semi-crystalline. But if the building material chain is not regular and does not have complete bonds, it will be transparent (amorphous). High Impact polystyrene is also a transparent material.

In the polymer structure of HIPS, the molecules are irregular and randomly connected. For example, suppose a pasta dish! This dish is full of noodles, but these noodles are not completely connected and there is space between them.

These polymers act isotropically against the flow; That is, when a current comes to them, they move in the transverse direction and the same direction. Now if our material is semi-crystalline, the current will cause the molecules to twist and contract.

Very interesting point! As mentioned, amorphous polymers are transparent; But high impact polystyrene is, in its natural state, semi-transparent!

2. HIPS is very impact-resistant.

As mentioned, this polymer is very strong due to its rigid structure. Of course, the homopolymer of this material is brittle and after combining with other materials, it becomes hard and resistant. To make durable polystyrene, we need to make about 5 to 10 percent of the composition from the butadiene rubber copolymer. Butadiene increases the resistance of polystyrene and increases its impact resistance. This can make HIPS suitable for food packaging. In addition, HIPS can be used to make medical products, home appliances, cosmetics, and industrial products.

3. High Impact polystyrene is a very suitable layer for printing.

One of the best layers for printing beautiful designs is high-impact polystyrene! It can hold a variety of designs and displays excellent color and quality when printing. Also, after the design dries on polystyrene, there is no printing adhesion.

4. HIPS is used in food packaging.

One of the most important uses of plastics in the world is food packaging. As stated by the FDA, all food packaging must be standard. Fortunately, high impact polystyrene has the required standard for packaging. Various foods such as meat, bread, vegetables, and fruits can be packaged in this polystyrene.

It is interesting to know that hips are moisture insulating. Therefore, it prevents food from spoiling in long-term storage. It is also great for storing sensitive foods such as vegetables.

In addition, high impact polystyrene has a high resistance to cold. So you can also use HIPS to store butter and dairy products.

5. You can order the desired high impact polystyrene!

It is an impact-resistant plastic. You can order the desired designs and colors! You can tell the manufacturer what kind of plastic you want; They make for you! The color of these plastics is resistant and is resistant to temperature changes.

As mentioned, HIPS is a type of amorphous polystyrene; So it is transparent and can be seen after painting.

6. This polystyrene is recyclable.

making polystyrene

making polystyrene

One of the most important advantages of HIPS is that it is recyclable! Environmental pollution is on the rise around the world. Now if the material is recyclable, it will be very valuable. This item is HIPS! You can heat your old and broken polystyrene and shape it to your liking. Then dry it and use it again. simply!

One of the biggest goals of making polystyrene was to make it recyclable. In a world where only 14% of plastic equipment is recycled each year, high impact polystyrene production is invaluable. Despite the different laws that exist in countries around the world, non-recyclable plastics are not produced! It should be noted that in a developed country like the United Kingdom, people have very limited access to HIPS plastic products! This will generate more non-recyclable waste and destroy the planet quickly!

Thermoforming properties of HIPS polystyrene

As mentioned, you can heat and shape the HIPS to your liking. Then cool it and use it! These wonderful molds have made the thermoforming properties of this material very valuable. In HIPS factories, very large sheets are heated. These plastic sheets are then placed on molding machines and turned into desired products. Types of high impact polystyrene forming methods are:

  1. Vacuum forming
  2. Twin sheet forming
  3. Pressing forming

Vacuum forming

Vacuum forming

Vacuum forming

In this HIPS forming method, the plastic details are not very important. This method is usually used for very large sheets of plastic. In this method, using a vacuum device, the heated plastic is pressed in the state. It is then cooled and used for a variety of applications.

Twin sheet forming

The most complex method of polystyrene forming is twin sheet forming. In this method, two sheets of the same size as polystyrene are heated at the same time and then glued together. This complex process produces double-walled plastic devices. For example, in factories, gas bottles and air ducts are made using the twin sheet forming method.

Pressing forming

In this method, plastic details and corners are important. This method produces precise and small plastics, unlike vacuum forming. The force of pressure devices is more than 3 times that of vacuum devices! This force makes the plastics have a precise shape and perfect details. This method is used to produce plastics for electronic components, auto parts, and electrical appliances.

A Summary of Introducing High impact polystyrene

features of High Impact polystyrene

features of High Impact polystyrene

As mentioned, HIPS polystyrene has many uses. This plastic is a type of amorphous plastic and has a semi-transparent appearance. Of course, after shaping and painting, this polystyrene will become transparent. The cost of buying HIPS polystyrene is low. This material has very good impact resistance and you can recycle it after use.

In addition, there are very good methods for forming these plastics. The excellent thermoforming properties of this polystyrene make it easy to recycle. It is flexible and retains its shape. In the world around us, we see a variety of devices made using high impact polystyrene.

These polystyrenes are very durable and have many applications in the industry. For example automotive, small and large plastic parts, small parts of electronic devices, toys, medical devices, food packaging, and making simple plastic devices. Polystyrene becomes high impact polystyrene with the addition of rubber. This reaction makes polystyrene have good impact resistance as well as a variety of applications.

You can contact our experts to buy HIPS polystyrene and also to know the price of high impact polystyrene. Our experts have professional experience in the field of the plastics industry and can provide you with free advice.

What is High Impact Polystyrene or HIPS?

HIPS is an important grade of polystyrene that has various applications in global industries. This polymer has a high impact resistance and is used to produce durable and widely used plastics.

Is it safe to use HIPS or High Impact Polystyrene?

One of the most important benefits of High Impact Polystyrene is its antibacterial and sun resistance. This polymer is non-toxic; If this polystyrene catches fire, it produces toxic and harmful fumes. It contains chemicals that are harmful to human health.

Is High Impact Polystyrene Recyclable?

This grade of polystyrene is recycled in the world and turned into new products. After recycling, HIPS is used to produce new products and durable plastics. In addition, recycling HIPS reduces environmental pollution.

What are the important applications of HIPS in industry?

This polymer is used in various industries; Manufacture of auto parts, auto parts, medical devices, durable plastics and food packaging are HIPS applications.

Is High Impact Polystyrene water resistant?

This grade of polystyrene is used to produce durable plastic materials. This polymer is a type of polystyrene grade that is used in global industries. It is interesting to know that this material is waterproof and resistant. In addition, it is resistant to sunlight and heat.

What are the most important advantages and disadvantages of HIPS?

This polystyrene material has various disadvantages and advantages. The most important advantages of High Impact Polystyrene are: low cost, impact resistant, recyclable and mass production. Disadvantages of HIPS include: lack of resistance to UV rays, lack of fire resistance and fragility.

Is GPPS grade better or HIPS?

HIPS is better if you want to make durable plastics. High Impact Polystyrene is translucent and easily recycled. In addition, it is cheap. This is one of the best polymers for producing durable plastics. But GPPS polystyrene is transparent and is used to produce transparent and brittle plastics.

What is the molecular structure of High Impact Polystyrene?

This polystyrene is one of the most important grades of polystyrene used in global industries. This polymer, like other grades of polystyrene, is produced by bonding styrene monomers together. This is one of the most widely used polystyrenes; The molecular structure of HIPS is (C8H8)n.

What does HIPS polystyrene look like?

This polymer is produced in different states. It should be noted that High Impact Polystyrene is usually produced in solid and foam form. This polystyrene grade is very durable and stable and heats up to 100 degrees Celsius.