الفهرس | Only 14 pages are availabe for public view |
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. |