Jet Flows of Amorphous Borate Esters for Ink Jet Printing
Abstract:Solid ink jets are used in printers. Invariably, solid ink jets are crystalline materials, which under go dramatic change in modulus in moving from solid to liquid state. During jetting, flow instability can occur depending on jet velocity, viscosity, surface tension and elasticity of the fluid. Satellite formation can occur when Weber number is high. The flow can range from dripping to jetting depending on the flow rate. A high Weisenberg number can lead to die swell or melt fracture in a jet flow.
In contrast to crystalline solid ink jet material, we are proposing the use an amorphous material, a borate polyester which exhibits an exponential decrease in viscosity on heating and is miscible with small molecular, semi-crystalline diluents enabling fine tuning of viscosity and temperature that a specific composition transitions from solid to liquid state. Specific rheological characteristics can be engineered by the nature of alcohals or glycols that are reacted with boric acid and by making mixtures of the various borate esters,
Document Type: Research Article
Publication date: January 1, 2005
For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.
Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.
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