Why synthetic fibres are cheaper than natural fibres?
Not all synthetic fibers are cheaper than natural fibers. Kevlar is more expensive than cotton for example. The synthetic fibers that are cheaper than natural fibers are cheap because they are built from cheap raw materials and produced very efficiently, for example, nylon and polyester are mostly built from oil byproducts and are efficiently produced in huge amounts. In contrast silk is only made by farming silk worms, which is a comparatively labor intensive process that relies more on the silk worms than thermodynamics and reaction engineering, there fore it is harder to control it’s production efficiantly.
