Want to know more about expanded polystyrene?

Have you ever wondered what lightweight ceiling tiles are made from? Have you ever wondered how polystyrene is made?

Polystyrene has many different uses and many different ways in which it can be made. It was discovered by a German man called Eduard Simon in 1839. However it took Hermann Staudinger, another German, to understand the full potential of what Eduard Simon had created. Hermann Staudinger won the Nobel Prize in 1953 for Chemistry because of his research.

Expanded polystyrene or EPS for short, is used to make insulation for buildings, packing material such as ‘foam peanuts’ and egg cartons. EPS is an extremely light, tough and low density material, which makes it ideal for packaging to protect products from damage during transportation and storage.

The process of making expanded polystyrene starts with polystyrene, which is created by combining benzene (C6H6) and ethylene (C2H4). Once that has been completed the polystyrene beads are subjected to pre-expansion.

Pre-expansion is where the polystyrene beads are expanded to forty times their original size, once that has been done the next stage is to let the beads age and then put into a mould and inject them with steam to expand the beads yet again, this creates expanded polystyrene.

Once cooled the EPF is then cut to the desired shape and coated with protective agents. The protective agents are used to protect the polystyrene from corrosion. EPF is also a very good form of insulation that is used in buildings, this is because it is filled with air which makes EPF a bad conductor of heat.

Many people know that polystyrene is used to create egg cartons, but a lot of people do not know that it is also used to make CD cases, television cabinets and numerous other durable, rigid products.

The Plastic that Saves Lives

Discovered by Eduard Simon in 1839, this plastic is one of the most widely used plastics with the scale of production totalling several billion kilograms per year.

You may think this type of plastic is only really used in packaging and takeaway coffee cups but in truth it comes in the form of hard plastic and is commonly used in the production of thousands of different products as a mould. It is cheap, easy to produce and easily manipulated into different shapes and forms making it extremely useful.

In fact, polystyrene is used, in the hard plastic form, as smoke detector housing and lab equipment: (petri dishes and test tubes and other apparatus frequently used in biomedical and pharmaceutical research). In other forms the plastic can be stretched into a transparent glass-like material often used in packaging. It is often transformed into lightweight foam which can be used as building insulation or even as a buoyancy aid. In short, it could save your life.

Despite these qualities the plastic is often harshly judged for being a danger to the environment due to the fact that it degrades so slowly. However, the plastic is easily recycled so there is no real need to leave it in a landfill. For example in Germany, the country of origin for this plastic, laws are passed to financially reward companies for collecting and recycling their polystyrene.

Furthermore, the environmentalists argue that the plastic does not degrade in landfills is flawed by the fact that nothing degrades in a landfill. Landfills are too tightly packed for anything to degrade as rotting requires oxygen to occur. This also explains why paper, the Styrofoam cup’s main and supposedly environmentally sounder competitor, can be found intact and readable after decades deep in a landfill. You have to ask yourself, how can a paper cup be safer than a foam one if its’ production creates waste water with 40 times more contaminants?