Polyurethanes (PU) is a reaction production of di or poly isocyanates with diols or polyols in the presence of a catalyst. PU possess good phyical properties and can be foamed, injection molded, cast sprayed, poured, reaction injection molded (RIM) and coated on surfaces.
Application of PU generally fall into three categories;
- Flexible foam
- Rigid foam
Reaction injection molding (RIM) process the sole forming area where polyol, isocyanate chain extends for time necessary to complete the reaction. RIM possess the features of injection molding and casting