NEW DESIGN OF AN INKJET PRINTING PRESS USING CURABLE WATER-BASED PRIMERS, COATINGS AND INKS

• Main Authors: WILSON, Ian Joseph, JARRETT, Kevin George, LAWRENCE, Phillip Wayne
• Format: Patent
• Language: English; French; German
• Published: 04.09.2019
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; GENERAL PROCESSES OF COMPOUNDING; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; LINING MACHINES; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING-UP

The invention describes a new design of commercial inkjet press with pre-coating prior to printing which may upgrade the quality of the surface of the substrate and enable it to be printable by all digital printing technologies including inkjet. Also described are curable water-based coatings and inks which may be cured at high speed without the need for external applied heat to dry the water content. The compositions of the invention, when used as coatings or primers, may create a surface on cellulosic substrates and polymeric films which is suitable for printing on by most printing methods including but not limited to inkjet, wet and dry toner systems, lithographic, gravure and flexographic. The primers or coatings may also add up to 15% tensile strength to lightweight papers under 40 GSM. The press design of the invention may produce high quality printed product from low-grade inexpensive paper substrates or polymeric film. The primers and coatings of the invention may allow colour printing, including 4-colour printing, on lightweight papers by conventional water based inkjet inks which papers could previously not be printed with this method; whilst the aqueous, curable inkjet inks of the invention may eliminate many of the shortcomings of conventional radiation curable inkjet inks.