The first polystyrene foam was received in 1928. Since that time, he has repeatedly modernized. To briefly characterize it – then this is a material with low thermal conductivity and lightweight.
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It is produced in this way: gas is added to the polymer mass of polystyrene. After that, the mixture is heated. When heated, the mixture increases in volume and fills the entire shape. For the production of fire -resistant polystyrene foam, carbon dioxide is added to the mixture.
Many consider polystyrene and polystyrene foam to the same. But it is not so. The main differences are as follows:
– The density of polystyrene foam is much higher than that of polystyrene;
– In foam, the internal structure is porous (from granules), and in polystyrene foam – a more homogeneous structure;
– polystyrene foam more durable material.
There are several varieties of polystyrene foam:
The last variety is the most popular. Thanks to the features of production for the manufacture of such polystyrene foam, it takes half as much as less raw materials, which is why its cost is lower than others.
The main properties of polystyrene foam:
– low thermal conductivity;
– moisture resistance;
– resistant to the formation of fungi and mold.