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Dyeing Properties of Polyester Microfibers

机译:聚酯超细纤维的染色性能

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Sorption isotherms and dyeing rates of purified disperse dyes on polyester microfibers (fineness of 0.25-1.0 denier) from water have been measured at 95℃. The isotherms are curved and well described in terms of the dual-mode sorption model: Nernst-type partitioning and Langmuir sorption are concurrently operative. The effect of a dif-fusional boundary layer on the dyeing rate is small under the conditions; the microfibers were dyed in the form of a bulky two-ply yarn in a well stirred bath. Dyeing rates of a commercial dye are also measured at 110 and 130℃. For dyeing of a 0.32d fiber at 130℃, the amount of dye sorbed by the fibers attains a maximum value at an early stage and then decreases gradually. This phenomenon is explained in terms of the aqueous solubility of very fine dye particles. The relation between dye sorption behavior and the fine structure of the microfibers is discussed.
机译:在95℃下测定了水在聚酯微纤维上的吸附等温线和纯化率,细度为0.25-1.0旦尼尔。等温线是弯曲的,并根据双模吸附模型进行了很好的描述:Nernst型分配和Langmuir吸附可同时进行。在这种条件下,扩散边界层对染色速率的影响很小;在搅拌良好的浴中,将超细纤维以膨松的两层纱线的形式染色。还可以在110和130℃下测量商业染料的染色速率。在130℃下对0.32d纤维进行染色时,纤维吸附的染料量在早期达到最大值,然后逐渐减少。用非常细的染料颗粒的水溶性解释了这种现象。讨论了染料吸附行为与微纤维精细结构之间的关系。

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