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

2003 ◽  
Vol 41 (16) ◽  
pp. 1909-1920 ◽  
Author(s):  
Chi-Jung Chang ◽  
Shinn-Jen Chang ◽  
Susan Tsou ◽  
Shou-I Chen ◽  
Feng-Mei Wu ◽  
...  
Keyword(s):  
High Speed ◽  
Ink Jet

The mechanism of a splash on a dry solid surface

2011 ◽  
Vol 690 ◽  
pp. 148-172 ◽  
Author(s):  
Shreyas Mandre ◽  
Michael P. Brenner
Keyword(s):  
Solid Surface ◽  
High Speed ◽  
Liquid Droplet ◽  
Contact Point ◽  
Quantitative Agreement ◽  
Gas Pressure ◽  
Liquid Viscosity ◽  
Ink Jet ◽  
Jet Printing ◽  
The Impact

AbstractFrom rain storms to ink jet printing, it is ubiquitous that a high-speed liquid droplet creates a splash when it impacts on a dry solid surface. Yet, the fluid mechanical mechanism causing this splash is unknown. About fifty years ago it was discovered that corona splashes are preceded by the ejection of a thin fluid sheet very near the vicinity of the contact point. Here we present a first-principles description of the mechanism for sheet formation, the initial stages of which occur before the droplet physically contacts the surface. We predict precisely when sheet formation occurs on a smooth surface as a function of experimental parameters, along with conditions on the roughness and other parameters for the validity of the predictions. The process of sheet formation provides a semi-quantitative framework for studying the subsequent events and the influence of liquid viscosity, gas pressure and surface roughness. The conclusions derived from this framework are in quantitative agreement with previous measurements of the splash threshold as a function of impact parameters (the size and velocity of the droplet) and in qualitative agreement with the dependence on physical properties (liquid viscosity, surface tension, ambient gas pressure, etc.) Our analysis predicts an as yet unobserved series of events within micrometres of the impact point and microseconds of the splash.

Ink-Jet as a Manufacturing Method for Drug Delivery Applications

2008 ◽  
Author(s):  
Bogdan V. Antohe ◽  
David B. Wallace
Keyword(s):  
Drug Delivery ◽  
High Speed ◽  
Biologically Active ◽  
Data Driven ◽  
Active Components ◽  
Manufacturing Method ◽  
Planar Surfaces ◽  
Ink Jet ◽  
Drug Delivery Applications ◽  
Manufacturing Applications

Recent drug delivery applications have stressed the need for precise dosage in the context of complex delivery vehicles. Ink-jet technology incorporates data-driven, non-contact techniques that enable precise, picoliter volumes of material to be deposited with high speed and accuracy at target sites (even onto non-planar surfaces) and thus has emerged as a front runner for drug delivery applications. Being data-driven, ink-jet dispensing is highly flexible and can be readily automated into manufacturing lines. Moreover, the ability to precisely target the delivery location reduces waste, an important factor when the active biological materials to be deposited are high value / high cost. Some of the applications that have made use of ink-jet methods for dosage and distribution of biologically active agents are: loading of active agents onto drug eluting stents (DES); generation of drug loaded microspheres; fabrication of polymeric nerve conduits loaded with nerve growth factor; and coating of the active components onto patches for transdermal delivery. This paper provides details on the manufacturing applications of ink-jet technology in drug delivery and discusses future potential uses and opportunities.

Visual Feedback Based Droplet Size Regulation in Electrohydrodynamic Jet Printing

2014 ◽  
Author(s):  
Berk Altın ◽  
Lai Yu Leo Tse ◽  
Kira Barton
Keyword(s):  
Image Processing ◽  
Visual Feedback ◽  
High Speed ◽  
Electrostatic Force ◽  
Micro Manufacturing ◽  
Precise Control ◽  
Electrohydrodynamic Jet Printing ◽  
Conductive Substrate ◽  
Ink Jet ◽  
Jet Printing

Electrohydrodynamic jet (e-jet) printing is a recent micro-manufacturing technique that uses electrostatic force to draw out ink from a conductive nozzle onto a conductive substrate. While the advantages (high speed and resolution, flexibility) of e-jet printing over ink jet printing and other microfabrication methods are abundant, precise control of the process is necessary for successful commercialization of the technology. This paper shows how visual feedback through image processing may be used to regulate the volume of printed droplets for increased manufacturing precision.

Ink-Jet as a Manufacturing Method for Drug Delivery, Tissue Engineering, and Medical Device Applications

2010 ◽  
Author(s):  
Bogdan V. Antohe ◽  
David B. Wallace
Keyword(s):  
Drug Delivery ◽  
High Speed ◽  
Biologically Active ◽  
Data Driven ◽  
Active Components ◽  
Manufacturing Method ◽  
Nerve Conduits ◽  
Ink Jet ◽  
Device Applications ◽  
Drug Delivery Applications

Recent drug delivery applications have stressed the need for precise dosage in the context of complex delivery vehicles. Ink-jet technology incorporates data-driven, non-contact techniques that enable precise, picoliter volumes of material to be deposited with high speed and accuracy at target sites (even onto non-planer surfaces) and thus has emerged as a front runner for drug delivery applications. Being data-driven, ink-jet dispensing is highly flexible and can be readily automated into manufacturing lines. Moreover, the ability to precisely target the delivery location reduces waste, an important factor when the active biological materials to be deposited are high value / high cost. Some of the applications that have made use of ink-jet methods for dosage and distribution of biologically active agents are: loading of active agents onto drug eluting stents (DES); generation of drug loaded microspheres; fabrication of polymeric nerve conduits loaded with nerve growth factor; and coating of the active components onto patches for transdermal delivery.

Two-dimension full array high-speed ink-jet print head

2006 ◽  
Vol 89 (7) ◽  
pp. 073505 ◽  
Author(s):  
M. Einat ◽  
N. Einat
Keyword(s):  
High Speed ◽  
Two Dimension ◽  
Print Head ◽  
Ink Jet
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