RESEARCH AND DEVELOPMENT- MODIFIED STARCH FOR SIZING

The instant invention relates to modified starch, process for production of the modified starch and its use in yarn sizing. The new starch derivative of the present invention can be used in conjunction with very less polyvinyl alcohol as a size composition. The sizing formulation of the present invention is better than other known size formulations because it has high PVOH compatibility and possesses other characteristics such as strength and flexibility on the yarn, adhesion to the yarn, resistance to abrasion, control of penetration into and encasement of the yarn, and viscosity stability, which is essential for a high-performance textile sizing agent.  

 Application No.1166 /CHE/2012

MODIFIED STARCH, PROCESS FOR PREPARATION THEROF AND USE IN YARN SIZING

The present invention relates to a modified starch, a process for preparation of the modified starch and its use in yarn sizing. In particular, the invention relates, in the preferred embodiment, to modification of starch by treating starch with ozone under alkaline conditions. Modified starch can be easily de-sized by alfa-amylase enzymes without involving detergents. The effluent of the de-sizing process can be simply discharged without being hazardous to the eco-system. In contrast. The modified starch has advantage over PVA (poly-vinyl alcohol) based sizing agents cannot be de-sized and discharged directly, since PVA is hazardous to the eco-system.