Polyurethane foams are the result of mixing and expanding of polyols and suitable isocyanates in certain ratios with the help of blowing agents. The blowing agent is put into the polyol system either prior or during the mixing. If the blowing agent percentage is increased the expansion is also increased and density is lowered. Depending on the type and application type polyurethane foams can expand up to 100 times their liquid volume.

Foaming Reaction :

Polyol System + Isocyanate + Blowing Agent => Reaction => Polyurethane Foam + Heat + G

Blowing Agents:

HCFC 141b (hydrochlorofluorocarbon)  

PENTAN (N-Pentane, Cyclopentane)
 
CO2 – Liquid Carbondioxide
 

CFC FREON-11 (CLOROFLORO CARBON) (Banned in Turkey)

The Polyurethane produced is categorized according to the Polyol’s and Isocyanate’s properties as; Rigid, İntegral - elastomer, flexible. Although the production processes are the same chemically the product’s properties differ from each other thus they are used in different fields of application.