Polyurethane resins are thermoplastic materials.
Polyurethane casting resins can be widely used for prototyping, small series production, modeling, reproduction of mock-ups etc.
Their technical properties can be varied within relatively wide range. That's why you can produce different mechanical elements from them or even you can replace broken plastic parts or check the assemblability of a newly designed product or maybe simply visualize the shape in live.
In most cases the polyurethane resin consists of two components:
As soon as the components are properly mixed together and casted in the mould, it takes approximately an hour for hardening. So you can demould the tool without damaging the casted part.
However, you will often have to wait several days until the item reaches the final hardness.
The urethane resins can also be categorised according to their consistency:
- Hard polyurethane, high Shore D hardness
- Polyurethane rubbers
- Polyurethane foams