Abstract:

In view of the proboem of the conventional polyester fiber on the difficulty dyeing fiber under atmospheric pressure, the thermal and dyeing properties of a novel modified polyester fiber were studied. The morphology and thermal properties of the fibers were characterized and tested by scanning electron microscope, differential scanning calorimetry and thermal gravimetric analysis. The results show that the fiber has longitudinal grooves and cross-shaped structures; the glass transition temperature, crystallization temperature, melting point and initial thermal decomposition temperature of fibres are 62 ℃, 131 and 241 ℃, respectively. The dyeing saturation value of fiber was measured by using methylene blue dye on the fiber, and the dyeing saturation value is 5.8. The fabrics are dyed with Maxilon cationic dyes(red,golden yellow,blue and black), and the dyeing rate curves are drawn. The results show that the dyeing balance can be reached after 30min, the holding time is 30 min and the color fastness is about 4 grade. The fabric is dyed with Maxilon Black, and the results show that the K/S value tends to be stable when the dye concentration is about 5 %(o.w.f.), and the dry and wet rubbing fastness is 4~5 grade.

Key words: cationec dye, modified polyester, dyeing performance, color fastness