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Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper and plastic substrates. [1] Inkjet printers were the most commonly used type of printer in 2008, [2] and range from small inexpensive consumer models to expensive professional machines.
Materials can not just be switched. The temperature of the inkjet must be more closely controlled to maintain surface tension and viscosity in a DOD system than in a CIJ system. Generally, lower viscosity allows better droplet formation [30] and in practice only liquids with viscosity of 2-50 mPa s can be printed. [17]
A promising physical technique is inkjet printing, which allows for conductive materials to be deposited in a precise and reproducible fashion onto paper. [38] [46] As a proof-of-concept, Ko et al. developed a paper-based electrical chip using a home office printer, an ink made of carbon nanotubes, and magazine paper. [47]
When current is applied, the crystal changes shape or size, increasing the pressure in the ink channel and thus forcing a droplet of ink from the nozzle. [7] [8] There are two types of crystals used: those that elongate when subjected to electricity or bi-morphs which bend. The ink channels in a piezoelectric ink jet print head can be formed ...
Three examples of droplet detachment for different fluids: (left) water, (center) glycerol, (right) a solution of PEG in water. In fluid dynamics, the Plateau–Rayleigh instability, often just called the Rayleigh instability, explains why and how a falling stream of fluid breaks up into smaller packets with the same total volume but less surface area per droplet.
The contact angle is the angle between a droplet of liquid and a paper surface. The molecular structure of co-styrene acrylate The molecular structure of co-styrene-maleic anhydride. In sizing, the strength and printability of paper is increased. Sizing also improves the hydrophilic character, liquid spreading, and affinity for ink. Starch is ...
The Aerosol Jet process begins with atomization of an ink, via ultrasonic or pneumatic means, producing droplets on the order of one to two micrometers in diameter. The droplets then flow through a virtual impactor which deflects the droplets having lower momentum away from the stream. This step helps maintaining a tight droplet size distribution.
A close-up of the dots produced by an inkjet printer at draft quality. Actual size is approximately 1 ⁄ 4 by 1 ⁄ 4 inch (6 by 6 mm). Individual coloured droplets of ink are visible; this sample is about 150 DPI.