By: D. Gopalakrishnan
Sardar Vallabhbhai Patel Institute of Textile Management,
Coimbatore - 641004

dgk_psgtech@yahoo.co.in

In current scenario, textiles not meant only for satisfying the basic needs of human, but also have to aid and enhance the human performance and comfort. This has lead to intense growth of functional textiles known as technical textiles. The most commonly emerging advanced applications include medical textiles, geotextiles, package textiles, industrial textiles, automotive textiles, protective textiles etc. With the development of new fibres and new manufacturing processes for yarn and fabrics, new area of applications for various sectors of technical textiles are in rapid growth. Over the years, the applications of manmade fibres have increased tremendously and that too in diverse fields. Yet there is no ideal single fibre which can satisfy all these requirements. This has lead to the development of Bicomponent fibres, which can be designed to suit the requirements of end user.

Bicomponent Fiber Capabilities

Bicomponent can provide:

� Thermal bonding
� Self bulking
� Very fine fibers
� Unique cross sections
� The functionality of special polymers or additives at reduced cost

Advantages of Bicomponent Thermal Binder Fibers

� Uniform distribution of adhesive
� Fiber remains a part of structure and adds integrity
� Customized sheath materials to bond various materials
� Wide range of bonding temperatures
� Cleaner, environmentally friendly (no effluent)
� Recyclable/ Lamination / molding / densification of composites

Production

Bicomponent and multi-component fibers are fibers which are generated during the spinning process from two or more polymers which have different chemical or physical characteristics. Two extruders are used for melting the chips in the simplest two-component-spinning process. The polymer melts are separately led to the spin packs or holes and thereafter spun to filaments.