Potensi Tapioka Sebagai Agen Biosizing Pada Benang Kapas

Sizing is the process of coating the yarn that will be woven with particular chemical treatment in order to make the yarn become resistant to abrasion and has good weave ability. Cotton yarn is easily broken when woven, so sizing is required to improve the weave ability. Tapioca potentially becomes biosizing agent that is more environmentally friendly and economical. The aim of this study was to determine the concentration of tapioca which gave optimal characteristics on Ne 50, Ne 32, Ne21, Ne 20, Ne 10 and Ne 7 cotton yarns, and to know the effect of concentration of starch in sizing process on characteristics of cotton yarns. In this research, some numbers of cotton yarn were sized with different variation of starch concentration. The variations were 10 g/l, 20 g/l, 30 g/l, 40 g/l and 50 g/l, viscosities of the gelatinized starch was measured. Absorption levels, tensile strength and elongation from sized cotton yarns were analyzed. The result showed that sizing with starch concentration of 20 g/l gave the optimum tensile strength on Ne 50, Ne 32 and Ne 21 cotton yarn with value of viscosity was 36,33 cP. On Ne 20, Ne 10 and Ne 7 cotton yarn, sizing with starch concentration of 30 g/l gave the optimum tensile strength with value of viscosity was 66,83 cP. Variations in the concentration of starch have significant effect on starch absorption and tensile strength, elongation do not have significant relation on sized yarn