Mechanism of Accelerant on Disperse Dyeing for PET Fiber in the Silicone Solvent Dyeing System

Abstract

Disperse dyeing for polyethylene terephthalate (PET) fiber in different non-aqueous solvent dyeing systems have been extensively studied over the past decades. In the present work, disperse dyeing for PET was investigated in a silicone solvent dyeing system. The influence of accelerant on the fiber swelling, uptake of dye, K/S value of dyed fiber, and dye solubility in the silicone solvent were systematically investigated. Compared with no accelerant, the final uptake of the disperse dye (C. I. Disperse Blue 367) could increase to 81% with 20% accelerant in the silicone solvent dyeing system, and the K/S value of dyed fiber was also higher (3.3 for no accelerant vs. 13.2 for accelerant). The influence of accelerant on the performance of disperse dyeing was also studied. Firstly, the solubility of the disperse dye in the silicone solvent can be decreased by the accelerant. Moreover, the solubility of the disperse dye is inversely proportional to the K/S value and the uptake of the dye. In addition, although the silicone solvent can diffuse to the inner fiber and has a partial swelling in the PET fiber, the swelling of PET can be improved by the accelerant. Furthermore, the swelling of fiber can reach equilibrium when the amount of accelerant was 15% (the weight of fiber). Therefore, this eco-friendly dyeing technology has considerable potential for application to a broad array of chemical fibers.

Extraction of Cyclic Oligomer and Their Influence on Polyester Dyeing in a Silicone Waterless Dyeing System

“…After dyeing, the solubility of disperse dyes in silicone solvent is relatively low at room temperature [11]; therefore, disperse dye and dyeing media can be easily separated by static filtration after the residual dyebath is cooled down. Therefore, silicone solvent can be recovered or recycled as a dyeing medium to achieve sustainable dyeing [12].…”

“…Yu et al [11] improved the dyeing effect of disperse dyes by synthesizing new dyes with appropriate solubility in silicone waterless dyeing media. Wang et al [12] showed that some dye-promoting agents can also improve the dyeing effect of polyester fabric. Pei et al [10] also confirmed that the use of dispersants did greatly improve the uptake of dye and the color depth of dyed samples.…”

Alkaline Hydrolysis and Dyeing Characteristics of Sea-Island-Type Ultramicrofibers of PET Tricot Fabrics with Black Disperse Dye

“…The increasing demand for high-quality textile materials, especially in the automobile and leisure industries, has driven the development of high-value-added synthetic fibers in which the advantages of synthetic and natural fibers are supplemented [1][2][3][4]. For example, the consumption of modified polyethylene terephthalate (PET) fibers, which are economical and exhibit excellent mechanical properties and chemical stability, has grown substantially in recent years [4][5][6][7][8][9]. To address the problem of uniformly textured PET fibers, the development of properties such as soft texture, flexibility, glossy drape, and absorptivity similar to those of nylon and rayon has been an engaging subject of study [10].…”

Nanocomposite Melt Spun PET fibers for Environmental Remediation

“…Such resins may be classified as low-viscosity or high-viscosity resins according to the intrinsic viscosity value [1][2]. PET is used extensively in the manufacture of synthetic fibers which compose the largest segment of the synthetic fiber industry [3][4][5]. Introducing small amounts of Nano clays into the PET polymer matrix is one of the passive barrier methods used to further improve thermal stability, barrier, and mechanical properties of PET [6].…”