Chemical propertie of textile fibre



        i.            Water: water is very important to determine the properties of fiber. According to the behavior of fibers with water, fibers are classified into two group –hydrophobic and hydrophilic. Water is used in process like scouring, dyeing etc.
      ii.            It is the ability of fiber to take up moisture and is expressed in therms of moisture regain. It depend upon the polarity of the polymers and the ratio of its amorphous and crystalline region.
    iii.            Acid: textile fiber and materials are subjected to acids in various process like bleaching. The different kinds of fibers react different with acids. The acid must be chosen properly to use different process so that it doesn’t make any harm to the fiber but brings the required changes perfectly.
    iv.            Alkali: different kinds of fibers behave differently with different alkalis in different situations. Fr example caustic sida in dilute solution and law temperature dissolved the wool fibers, when as mild alkalis have no injurious effect on wool at ordinary concentration. It is used to many presses as dyeing. Sizing and finishing.
      v.            Heat: textile fiber are subjected to heat in dyeing, drying, steaming, calendaring, pressuring and other operations. Some fibers become tough under heat suct as rayon, resin, where as some burn under heat such as flax, cotton, jute etc.