Why is pentane used as blowing agent? Pentane–blown foams have another advantage: better dimensional stability due to the fact that pentane does not condense as much as HCFC-141b at temperatures normally experienced by the foam in use. The condensation of HCFC-141b causes the cells to shrink and expand on a cyclical basis, reducing dimensional stability.”
Blowing agents are used to decrease the density of the polymer, typically by 40–60% with loading levels of 0.5–20.5% by weight on the amount of polymer.
Releated Terms:
Extrusion, Carbon Dioxide, Flame Retardant, Polyurethane Foam, Polyurethanes, Resin, Injection Moulding, Foaming Agent, Porosity