Why do MSDA chairs use PP+GF instead of regular PP or ABS?

Question

Accepted Answer

Adding glass fiber (GF) to polypropylene dramatically increases its stiffness, impact strength, and heat resistance—while keeping the part lightweight. For structural parts like backrests and bases, PP+GF gives us performance close to engineering plastics (such as PA) at a much lower cost. ABS is reserved for decorative parts where surface finish matters more than load.