what are the raw materials used for synthesising synthetic fibres like acrylic nylon and polyester?
['Natural Fibre: Fibres which are obtained from plants and animals are called natural fibres, e.g. cotton, wool, silk, jute, etc.', 'Synthetic Fibre: Fibres which are man-made are called synthetic fibres, e.g. nylon, acrylic, etc. ... ', 'Petrochemicals: Almost all synthetic fibres are made using raw materials from petroleum.']