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⵵/ȣ 1999 / ȣ: V.11,no.3,Jun
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2(Ÿ) Dyeing Properties of Polyester Ultrarmicrofiber
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ʷ Polyester ultrarmcrofiber(UMF, fiber fineness : 0.05d) and the other three kinds of polyester fibers(0.52, 1.04 and 2.08d) were dyed with two disperse dyes, C.1. Disperse Red 60 and Blue 56. Dyeing rates and absorption isotherms of these dyes have been measured at 100, 115 and in water system. The dye bath was maintained at pH 5.0 with acetic acid(0.1mo1/1) /sodium acetate(0.1mo1/1) buffers and a liquor ratio of 10001. The absorption isotherms from two disperse dyes are nearly linear up to the saturation values, which increase with the temperature of dyeing. Dye uptake decreased with the fiber fineness in lower temperature , whereas increased in higher temperature. A comparatively greater quantity of dye is necessary to dye ultrarmcrofiber fabrics than conventional fabrics. Disperse Blue 56 having a good build-up property is agreed to Fothergill\\\'s equation, which is inversely varied with the fiber fineness by the quantity of dye necessary to obtain a given shade.
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