Screen printing organic binder

Screen printing of UV inks is being done over paper, metal, films, foils, plastics, and PVC. Radiation curable materials are being used as vehicles for ceramic inks that are screened onto automotive windshields, cured, and then fired in an oven to bum off the organic binder and fuse the ceramic into the glass windshield. ... 

The screen-printing technique was used to make the field emission cathodes. The carbon powder was obtained in the arc discharge. It was mixed with an organic binder to form a paste, which contains more than 80% of multiwall carbon... 

A cermet thick-film paste has four major ingredients an active element, an adhesion element, an organic binder, and a solvent or thinner. The combination of the organic binder and thinner are often referred to as the vehicle, since it acts as the transport mechanism of the active and adhesion elements to the substrate. When these constituents are mixed together and milled for a period of time, the result is a thick, viscous mixture suitable for screen printing. 

The organic binder in its usual form is too thick to permit screen printing, which necessitates the use of a solvent or thinner. The thinner is somewhat more volatile than the binder, evaporating rapidly above 70-100°C. Typical materials used for this application are terpineol, butyl carbitol, and certain of the complex alcohols into which the nonvolatQe phase can dissolve. 

The organic binder, a nonvolatile organic, serves the purpose of holding the active elements and the adhesion elements in suspension until firing of the fihn takes place, and it also provides the paste with the desired fluid characteristics needed for screen printing. The organic binder, such as ethyl cellulose... 

The composihon and characterishcs of the paste are critical factors in screen printing. The cermet (combinahon of ceramic and metal) pastes commonly used in the thick-film technology have four major ingredients (1) an active element that establishes the frmction of the film, (2) an adhesion element that provides the adhesion to the substrate, (3) an organic binder a matrix that holds the active particles in suspension and which provides the proper fluid properhes for screen printing, and (4) a solvent or thinner that establishes the viscosity of the vehicle phase [21,22]. 

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