Abstract
The jetting performance of dye inks determines the image quality, production efficiency, and lifetime of the print head. In the present study, we explored the jetting performance of mixed solutions of polyethylene glycol (PEG) and reactive dye by testing the visible absorption spectra, rheological properties, and surface tension, in addition to the observation of droplet formation. The results indicate that PEG macromolecules could change the aggregate groups of Red 218 molecules into smaller ones through hydrophobic interactions and separation effect. The addition of PEG into the dye solution increased the viscosity and decreased the surface tension. In the whole shear rate range tested, the 10% and 20% PEG400, as well as the 30% PEG200 dye solutions, showed good Newtonian fluid behavior. PEG macromolecules improved the droplet formation of the dye solutions. Increasing the PEG400 concentration to 30% and 40% resulted in elimination of the formation of satellites and the formation of ideal droplets at 10,000 Hz jetting frequency. A 30% PEG600-dye solution with the Z value of 4.6 formed the best spherical droplets at 10,000 Hz and produced perfect color images on cotton fabrics.
Highlights
Digital inkjet printing has become an important technology in the textile industry [1,2,3,4,5,6,7,8,9]
The surface tensions of Red 218 and polyethylene glycol (PEG) solutions were measured with a SITA surface tension meter (SITA company, Dresden, Germany) at 25 ◦ C
Adding 10% PEG400 in the dye solution resulted in an obvious increase of peak height, and the two peaks red-shifted to 524 and 558 nm, respectively
Summary
Digital inkjet printing has become an important technology in the textile industry [1,2,3,4,5,6,7,8,9]. Satellite droplets form more during inkjet printing with high-drop-velocity nozzles such as Kyocera’s [12,13,14], leading to low-quality images on the fabrics. Large dye aggregates form dye particles when the ambient used in inkjet printing with no satellite droplets [12]. In order to obtain deep and bright colors jetted on fabrics, it is reactive dyes, and water [21,22]. Non-toxic formulation of high-performance reactive dye inks. PEG anddye reactive dyetoinobtain orderhigh-performance to obtain high-performance reactive dye inks solutions of PEG and in order reactive dye inks which are which are environmentally environmentally friendly. PEG anddye reactive dyetoinobtain orderhigh-performance to obtain high-performance reactive dye inks solutions of PEG and in order reactive dye inks which are which are environmentally environmentally friendly. friendly
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