Influence of degumming reagents on the rate of dyeing with acid dye.

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  • 精練剤が酸性染料の吸着速度に及ぼす影響
  • セイレンザイ ガ サンセイ センリョウ ノ キュウチャク ソクド ニ オヨボス
  • 絹の染色機構に影響を及ぼす諸因子に関する研究 第2報

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The rates of dye adsorption at the early stage of acid dye (C. I. Acid Orange 7) on the silk to be degummed with different reagents were measured. The degumming was conducted in the mixed aqueous solution of 10% o, w. f. of reagent (sodium carbonate, potassium carbonate, sodium silicate, potassium silicate except for straw ashes) and 10% o. w. f. nonionic surfactant, at 90-95°C for 2hrs. The rates of dye adsorption from start to 600sec and the adsorption isotherms were measured in a semi-infinite liquor ratio at 60, 70 and 80°C. The results were obtained as follows: 1) The dye uptake on the silk which degummed with silicate anion was a little lower then that with carbonate anion. 2) The rates of dye adsorption at early stage on the silk to be degummed with sodium carbonate were similar to those of potassium carbonate, but the silk to be degummed with silicates was higher than those with carbonates. 3) The degumming behavior of straw ashes was similar to that of potassium silicate. From these results, it may be known that the difference of degumming reagents was affecting the rate of dyeing with aisd dye.

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