Although UV and waterbased inks have been used in narrow web printing for some time now, the use of PP, LDPE and metallized substrates have recently become more common. As a result, the need for corona treating equipment on narrow web presses has increased, presenting manufacturers with a series of design challenges. Similarly, corona treaters have been used on narrow web presses for years but have traditionally been used to assure...
The increased use of U.V. and waterbased inks, in conjunction with polyethylene and polypropylene is making corona treating a vital part of the converting process. As a result, corona treater manufacturers have been challenged to advance the state of technology to meet the increasing demands resulting from the expanding use of corona treaters. Recent developments in corona treating designs have reflected the influence of...
There are two different types of treater stations, one designed to treat conductive substrates, now known as bare roll, and the other designed to treat non-conductive substrates, known as covered roll. The primary difference between these designs is the location of the dielectric material, and the method used to cool the dielectric. Conductive or metallized substrates require the dielectric to be on the "hot" electrode, so the high voltage won't...
The increased demand for corona treater products is apparent by the greater volume of materials being handled by plastics processors and the growing number of applications. The trend is for even greater reliance upon corona treating to prepare increasing amounts of film and foil webs for printing, gluing and other converting steps that require a surface that will readily accept inks or adhesives...
The trend toward converting to waterbased inks has forced the flexographic printer to become familiar with many new sciences, procedures, and processes in order to achieve the final product. Once the responsibility of the film supplier, flexographic printers are finding that in conjunction with using waterbased inks they must bring the surface treatment process in house in order to produce an acceptable print quality...
The occurrence known as “backside treat” is the result of a corona being produced on both sides of the web even though the treating system is only intended to treat one side. The resulting undesired treatment on the backside of the web can result in blocking and picking. It may also cause an insufficient treat level on the side of the web requiring treatment, since some the power intended for treating the web was delivered to the opposite side...
Plasma treatment modifies material surfaces to enhance bonding capabilities. By generating ionized gas, it interacts at the microscopic level, increasing surface energy and improving adhesion, wettability, and bonding with coatings, adhesives, and inks. This versatile process is utilized across industries such as automotive, aerospace, electronics, and medical devices to boost material performance without altering inherent properties...
