Surface Modification of Polymer Coatings in Electroerosion Printing Media
Original Publication Date: 1985-Dec-01
Included in the Prior Art Database: 2005-Feb-19
Electroerosion printing can be used to make direct negative and offset masters for use in printing. The electroerosion medium typically is comprised of a support layer or substrate, a thin conductive layer such as Al, and abase layer located between the Al layer and the substrate. Aprotective, lubricating overlayer can also be used. The preferred binder systems for the base layer include CAB (cellulose acetate butyrate), cellulose derivatives including ethyl cellulose, cellulose acetate, nitrocellulose and polymers such as polyvinyl alcohol, polystyrylallyl alcohol or polyvinyl butyral, which contain free hydroxyl groups for crosslinking with isocyanates or other reactive reagents to form urethane crosslinked polymer matrix.