Fibres are the basic raw material for any textile industry, technically which is defined as a unit of matter, characterized by flexibility, fineness and a high length to width ratio. Different kinds of fibres are used in textile industry as raw material. Some of these fibres were well known and used earlier as well as even today, while some others have acquired importance in recent years. The factors affecting the development and utilization of these fibres include their ability to be spun, their availability in

sufficient quantity, the cost or economy of production and the desirability of their properties to consumers. The detailed classification of fibres is as shown in Figure 6.