Effects of polymeric dispersants and surfactants on the dispersing stability and high‐speed‐jetting properties of aqueous‐pigment‐based ink‐jet inks

Abstract

Good jetting performance and pigment‐dispersing stability are necessary for pigment‐based ink‐jet inks. This study investigates how the chemical structures of the polymeric dispersants affect the pigment‐dispersing stability and jetting performance of ink‐jet inks. A series of polymeric dispersants containing styrene (hydrophobic unit) and acrylic acid (hydrophilic unit) with different ratios have been synthesized and used to disperse different pigments. Because 3000–12,000 ink drops can be expelled from the nozzle of a thermal bubble‐type ink‐jet printer within 1 s, the jetting behavior is related to the rheology variation of a dilute solution under a high shear. An in situ drop formation system has been used to study the high‐shear‐rate rheology (dynamic surface tension and dynamic viscosity) of a solution with a viscosity lower than 3 cps, which no commercial rheometer can measure. Excellent ink‐jet inks can only be produced by the combination of pigments, dispersants, and surfactants with appropriate hydrophilicity. Moreover, the correlation of the pigment surface properties, the chemical structures of the polymeric dispersants, and ink formulation is discussed. The effects of the surfactants and firing conditions on the jetting behavior of the ink‐jet ink are also examined. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 1909–1920, 2003

Ink‐Jet Printing, Self‐Assembled Polyelectrolytes, and Electroless Plating: Low Cost Fabrication of Circuits on a Flexible Substrate at Room Temperature

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Synthesis of UV and thermal dual curing oligomer for solder resist ink using ink‐jet printing

“…Several related standards of the inks and masks are listed in Table . Due to the inkjet printer can expel thousands of inks drops in a second, it is essential to examine the theological property of the solder resist ink to determine its processability . Figure presents the viscosity of the solder resist inks using different oligomers measures at different shear rates.…”

Effect of process conditions on the properties of surface‐modified organic pigments encapsulated by UV‐curable resins

“…Therefore, they are usually used as colorants for coatings, inks, plastics and in the painting and printing industries [4]. However, conventional pigment dispersions generally have large particles, wide particle size distribution and poor stabilities, which limit their use in ink-jet printing and many other applications [4][5][6]. This property is due to their inherent aggregation through strong non-covalent bonding interactions [2,3].…”

“…However, conventional pigment dispersions generally have large particles, wide particle size distribution and poor stabilities, which limit their use in ink-jet printing and many other applications [4][5][6]. In this system, repulsive forces increased when the dispersant adsorbed onto the pigment surface and thus provided the pigment dispersion with good stability [5]. The surface treatment of organic pigments to improve dispersion stability is the key to their continuing potential application.…”