INTRODUCTION OF CHELATE BOND TO FIBER

Abstract

The dyeing of the new synthetic fibers which show no affinity for dyestuff should be considered from different standpoint.The dyeing of these synthetic fibers is thought to be mechanical treatment of carrying dyes into the inner part of fiber rather than the chemical combination of dyes with fibers.The affinity of polyester fiber for dyes was given by introducing metallic ions under pressure.Tetoron, a commercial name of polyester fiber, having a rigid construction, is used in these experiments, and Cr ion was fed in the form of the aqueous solution of K2Cr2O7. The results obtained are as follows;(1) Cr absorption with time and temperature. The quantity of Cr absorbed by this fiber increases with time and temperature from the solution of the definite Cr concentration. (Fig. I)(2) Equilibrium absorption of Cr ion with Tetoron. The results are shown more fully in the form of Freumdlich absorption equation (Fig. 3) than in the form of Langmuir equation. (Fig. 4).(3) Cr absorption with the concentration of H2SO4: Cr absorption by tetoron increases with increasing H2SO4(Fig. 5)(4) Removal of Cr in tetron by boiling in water, About 9% of the absorbed Cr in tetoron is washed out by boiling in water for thirty houres. (Fig. 6)