Drying of Inkjet‐Printed Droplets

Kuerten, Johannes G.M.; Siregar, Daniel

doi:10.1002/9783527647101.ch7

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…However, they observed that spreading and wetting take up to 5 s before the droplets reach an equilibrium stage. Kuerten and Siregar stated that the drying time for inkjet droplets is usually in the range of a few seconds. This is confirmed by recent experiments of Talbot et al .…”

Section: Resultsmentioning

confidence: 99%

Rheological Control of the Coffee Stain Effect for Inkjet Printing of Ceramics

2013

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The rheology of inkjet printing inks must be well controlled in order to be able to form small droplets. One solution is to use low volume fraction dispersed suspensions, but this leads to a common problem during drying called the coffee stain effect. It is caused by particle migration from the center to the edge of a drying drop and leads to nonuniform printed structures. This article describes an approach, to suppress the coffee stain effect by a sufficiently fast increase in viscosity after deposition. Due to the viscosity limitations during printing, inks with tailored rheology and drying behavior need to be developed. Ceramic inks were prepared and printed. First, a binder was added to study the influence of viscosity on printability and the coffee stain effect. Second, the use of a high vapor pressure solvent for faster drying was investigated. Eventually, an ink with the combination of binder and fast drying agent was prepared. This ink showed a considerable decrease in drying time as well as a rapid increase in viscosity after deposition and was suitable to completely suppress the coffee stain effect. Plateau‐like structures were achieved by adapting the drying temperature to permit particle movement to a certain degree.

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Section: Resultsmentioning

confidence: 99%

Rheological Control of the Coffee Stain Effect for Inkjet Printing of Ceramics

2013

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“…For a thin droplet with a small contact angle, the first assumption can be written as = H/R ( 1. These assumptions lead to a simplified form of the Navier-Stokes equation [35,16,17,36], where the radial velocity component u can explicitly be determined from the pressure p at the liquid-air interface.…”

Section: Lubrication Equationmentioning

confidence: 99%