User:Neha kumari11/Sandbox

FIBRES Fibres are of two types namely natural and synthetic fibres.Natural fibres are those which we obtain from plants for ex.jute,cotton etc and animals like wool,silk etc.Synthetic fibres are naylon,rayon,polyster,acrylic etc. Fibres are polymere. 'Poly' means many and 'mere' means small unit.So polymere means many small repeating units. How can we differentiate between natural and synthetic fibres? It is very simple. We can perform 'Burn test'. When we place natural fibres ,for ex.cotton and place over the flame ,it burns. It is not sticky to touch. But when we place synthetic fibres like nylon,over the flame,it melts and sticks when we toch that time.