Experimental investigation on mechanical and tribological characteristics of magnesium alloy nanocomposites for cylinder roller in printing processes

Abstract

Printing and Packaging Technology is a field used for designing, newlineevaluating, enclosing, wrapping, and preserving the safety and quality of the newlineproduct during warehousing. Gravure printing is one of the major printing newlineprocess which is characterized by its simplicity, long run, high quality and newlineability to print on flexible packages and at very high speeds. This is the major newlineprinting process used for industries that include food, medicine, confectionary newlineand other packaging application. Modern gravure printing process consists ink newlinefountain, an engraved gravure cylinder as an image carrier, impression roller, newlineand the doctor blade as basic components. It can print with the widest range of newlinesubstrate and ink formulations. newlineThe gravure printing process is a recess process which means that newlinethe image carrier has the image etched below the surface of the non-image newlinearea. The image carrier is a cylinder with engravings that is partially dipped newlineand rotated in an ink duct, effectively transferring the ink onto the cylinder newlinesurface. The excess ink on the cylinder is wiped off by a doctor blade without newlineaffecting the ink in the recessed image cell. An impression roller that is newlinecovered with an elastomer material, applies pressure to the substrate on the newlineprinting cylinder and transfers the ink from the cells to the substrate by newlinecapillary action. Subsequently, the substrate is routed through a dryer unit to newlineensure it is dried before proceeding to the next color unit and printing an newlineadditional layer of ink. The printing cylinder is generally fabricated using newlinestainless steel and coated with copper. The stainless steel printing cylinder has newlinecertain disadvantages such as high weight, and are easily prone to corrosion. newlineTherefore, it is necessary to research explore on durable, low weight corrosion newlineresistance materials. newline newline