Sheet material for printing plate

• Main Authors: NICKOLAS C KOTOW, EDWARD C ROBINSON, ROBERT E BOMBALSKI, MARK L WEAVER, JEAN ANN SKILES, THOMAS LEONARD LEVENDUSKY
• Format: Patent
• Language: English
• Published: 18.03.1998
• Edition: 6
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LINING MACHINES; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE; PERFORMING OPERATIONS; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM; PRINTING; PRINTING PLATES OR FOILS; PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTINGSURFACES; STAMPS; TRANSPORTING; TYPEWRITERS

A printing plate for flexographic or lithographic printing is made by coating an aluminium alloy or steel sheet with a polymer layer having an outer surface, coating the polymer layer with mineral or metal particles having an average particle size of less than about 30 microns, and with the polymer layer near its melting point, compressing the solid particles so that most of them are below the polymer layer outer surface. The solid particles are preferably alpha-alumina particles having an average size of 1-10 microns. The printing plate has improved wear resistance.