Dyeing Procedures of Polyester Fiber in Supercritical Carbon Dioxide Using a Special Dyeing Frame

Abstract

Supercritical CO2 fluid dyeing, a new type of anhydrous dyeing technology, has the advantage of high uptake rate, short dyeing process, recycling of dyes and CO2, and zero discharge. This study investigated a dyeing technique of loose fibers using supercritical CO2 as solvent to replace water. Based on the existing characteristics of the self-developed supercritical CO2 dyeing equipment, a special dyeing frame of loose fibers was designed. Using the dyeing frame and inner and outer dyeing processes, polyester fibers were dyed with disperse red 153# maternal dyes at temperatures of 80–140?, pressures of 17–29MPa and time of 20–80min, respectively. The experimental results revealed that the dyeing performance of fibers was good on the dyeing frame, as well as with a favorably increased temperature, pressure and time. Dyeing temperature had a strong influence on the color yield. The dyeing results were compared with those of polyester fibers dyed with disperse red 153# dyes. With the special dyeing frame of loose fibers, color fastness to washing and artificial light was generally similar to conventional aqueous medium methods.

A Novel Eco-Friendly Scouring and Bleaching Technique of Flax Rove Using Supercritical Carbon Dioxide Fluid

“…However, it is notable that both residual gum content and whiteness for the extracted flax rove were negatively affected obtained in supercritical carbon dioxide fluid when the fluid flow increased from 30 g/min to 50 g/min. Theoretically, a higher fluid flow causes supercritical carbon dioxide fluid to penetrate more easily into the amorphous phase of the flax fibers, leading to swelling of the fibers [24]. Accordingly, the extraction capacity of the non-fiber tissues in the flax rove was increased.…”

Mass transfer of Disperse Red 153 and its crude dye in supercritical CO2 fluid

“…3, the K/S values of the dyed polyester were increased moderately between 17 and 23 MPa, which indicated more dyes dissolved in supercritical CO 2 because of the increase of the CO 2 fluid density. Moreover, the diffusion rate of the dye and the dye concentration on the fiber surface were increased with the improvement of mass transfer impetus at higher pressure [3]. Therefore, more dyes diffuse into the fiber to promote the dyeing.…”

“…Supercritical CO 2 dyeing uses industrial CO 2 emissions as a dyeing medium to dissolve and carry dyes to fiber surface, which surmounts the disadvantages of aqueous dyeing, and achieves eco-friendly dyeing production for textiles [1,2]. The CO 2 can only dissolve non-polar and/or low-polar organic solid substances because of its low dielectric constant [3,4]. Therefore, disperse dyes are selected as the main dyes since their molecular structures display low polarity.…”

Dyeing of Polyester with Reactive Dyestuffs Using Nano-Chitosan

“…Surface modification of textile fibers is one of the most useful methods of textile treatment. By the modification of the fiber surface only, deterioration of fiber quality and bulk properties is minimized [4][5][6].…”