Mpa Stiffness 160 Gpa 75 Gpa 60 Gpa 3-4 Gpa Max. Plastic products are produced in one or at most two operations. Plastics require little or no finishing, painting, polishing etc, and particular finishes can be achieved at relatively low cost. Plastics can be coloured during manufacture- no painting etc required. Plastics can be easily printed, decorated or painted.
Plastics are corrosion resistant, and generally waterproof.
Plastics are lighter than metals, giving deeper sections for a given weight, and hence stronger sections. To obtain the cost benefits of using plastic products you need the tooling to do it with. This can take the form of an extrusion die, a mould tool, or a former. All of these things are expensive, and take time to make. This is intended as a quick guide.