Nylon

Nylon filament forms very tough and robust models which makes it a very attractive material for 3D printing. Nylon printed with 100 % infill can be as strong as injection-moulded parts. It is also possible to colour nylon filament before or after it has been printed. 
The nylon from Orbi-Tech is stiff and very strong, whereas nylon from Taulman is flexible and very strong.