الفهرس 
Research and Experimental Development Survey of Starch- IntroductionOnly 14 pages are availabe for public view
 |  | from | 32 |  |  |
| | | from | 32 | | |
Abstract
Here in we present an industrial innovation which provides cleaner, safer and
cheaper practice for sizing of cotton and cotton polyester blend warp yarns. The
innovation based on conducting the oxidation of Tapioca starch in textile mill during
the size operation rather than obtaining ready - made oxidized tapioca starch through
chemicals producing companies. The practice entails concurrent oxidation of tapioca
starch and preparation of tapioca starch size via incorporation of a proper amount of
ammonium persulphate during cooking of starch in presence Acrylic acid monomer
or acrylamide monomer to preparation of tapioca starch polyvinyl monomer
composite via simultaneous oxidation and polymerization reaction. This innovative
size based formulation is applied a beginning by trials and applied different cotton
and blends warp yarns. The so sized yarn were woven using fast looms, namely
sulzer, rapier and Air jet and compared with those of the conventional sizing
formulation with respect to technical properties of the sized yarns, efficiency of the
looms, quality and reduction in the production cost.
The results indicate that (a) higher abrasion resistance and tensile strength with
innovative size - based formulation as compared with conventional
sizingformulation, (b) the weaving efficiency observed with warps sized with
innovative formulation is equal to or in some cases higher than the weaving
efficiency found with warp sized using conventional formulation (c) omitting of
CMC along with complete replacement of PVA by vinyl monomers this leads to
production cost saving exceeds 50%; That is the latter could be achieved with the
innovative formulation as a result of complete imitation of CMC and PVA by
oxidizing starch with vinyl monomer graft polymerization.