BigPatents India

A process of preparation of a chemical, which is a very useful chemical in textile sizing. This invented chemical is produced by the reaction of Poly Vinyl Alcohol (cold) : water: Urea : hydrated Sodium Acetate in the ratio 10: 170: 150: 75. Acetamide, Carbamic acid, Carbonic acid, Ammonium hydroxide and a Poly Vinyl Alcohol (cold) with water solution is produced at the completion of the reaction. Textile sizing is a process where yarns are coated with cooked starch pastes and dried in order to protect the yarns from external stress, strain and abrasion in the weaving machine, i.e loom. Starch pastes generally after drying make the yarn strong but also make the yarn stiff, as dry starch films are brittle in nature, so lowers the elongation property of the yarn and causes more yarn breakages in the looms thus lowers the weaving shed efficiency. This innovated chemical when added with starch in an amount 13% to 19% on the weight of the starch and cooked with water (starch amides are produced as a result of this reaction) then after sizing and drying of the yarn, yarn can restore its elongation property without loosing its strength, thus reduces warp breakage rate by 30% to 40% and weaving shed efficiency increases by 2% to 4%. No. of Pages:16 No. of Claims:16