Plastics update

摘要

Carbon-dioxide (CO_2) blowing represents a significant advance in polyurethane foam production technology as it uses physical processes, rather than chemical reactions, to reduce densities. Using water blowing alone, ICI Polyurethanes has succeeded in reducing the density of automotive seat foam from 60 kg/m~3 (a typical figure in 1990) to about 32kg/m~3. CO_2 blowing offers the potential to reduce this figure further by up to 25 per cent, without compromising seating comfort or foam durability.