In our country, everyone is familiar with the name “foam”, many are not even aware that this material is called only in our country. As you know, this name came from the first company of the manufacturer of this material, in the then Soviet Union, in fact, the foam rubber is not at all, but an elastic polyurethane foam or in a simple polyurethane foam foam. The main part of this material is occupied by air, it is about 90% of the total volume of elastic polyurethane foam, which is why it is so easy.
At the moment, foam producers use two main methods of its production is a periodic and continuous ways. It is also worth noting that elastic polyurethane foam is widely represented in all corners of our country, therefore, for example, it is easier to buy a foam in Moscow.
Periodic or as it is also called a “drawer” method, has a very long history of more than 50 years. The production process in this case occurs by portioning foam filling into special boxes. After the foam rises, the boxes are disassembled, and as a result, foam. By the way, this method of production differs in that as a result, it seems that with the same production method and using the same components, different foams are often obtained, and sometimes an elastic polyurethane of low quality is obtained.
The continuous production method consists in the conveyor method of manufacture, when the formed foam is in full move along the conveyor. As a result, foam blocks are obtained, which can reach 60 meters. As for the structure, the blocks in this case differ in this way “the same” in their properties, and this is an undoubted advantage of this production method. Although it should be noted right there that the first meter of the block produced in a continuous way can have some differences from the rest of its part.
It must also be said that foam rubber is produced in a formed way, when the foam is poured into the container of certain forms, thus, polyurethane foam products with complex shapes are obtained. Although it is impossible not to notice that those parts of foam rubber that gain their complex forms as a result of cutting with special machines show much higher physical and mechanical properties than those that are made using special forms.
Now the most popular types of foams are its brands that have improved characteristics and this despite the fact that such material is always more expensive than a conventional foam by about 25%.