Question: what are the raw materials used for synthesising synthetic fibres like acrylic nylon and polyester?
Answer: 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.