RIM is the result of a reaction between two liquid components isocyanate and polyol as they are injected into a closed mould at low pressure. The two components are mixed together as they flow into the mould as a low-viscosity liquid and the reaction, which increases the temperature and the pressure at the surface of the tool, forms the polyurethane part in the tool cavity.
Polyurethane resins for RIM have grown into a broad range of formulations with particular physical properties for specific performance requirements. Rapitypes can produce virtually anything from flexible elastomer substitutes, to foam-core parts to extremely rigid, solid and thin-walled components.
Parts can be supplied primed, painted or surface treatedwith graphics to simulate various textures such as carbon fibre. However, our clients are increasingly taking advantage of our in-mould painting capability to get high quality paint finishes which are chemically bonded to the surface of the part.