COATING FOR INKJET PRINTHEAD FRONT FACE AND A PROCESS OF FORMING OLEOPHOBIC LOW ADHESION COATING FOR INKJET PRINTHEAD FRONT FACE

• Main Authors: ZHAO HONG, LAW KOCK YEE, SAMBHY VARUN, SMITH DARREN
• Format: Patent
• Language: English; Korean
• Published: 29.10.2013
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; LINING MACHINES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON 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; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SELECTIVE PRINTING MECHANISMS; SPRAYING OR ATOMISING IN GENERAL; STAMPS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

PURPOSE: A method of forming coating for front face of an inkjet printhead and oleophobic low-adhesion coating for front face of an inkjet printhead can prevent ink smudging since the ink droplets of a printhead roll down and off the front face of the printhead without leaving residues. CONSTITUTION: A method of coating for a front face of an inkjet printhead comprises oleophobic low-adhesion coating (26). Said oleophobic low-adhesion coating has a high thermal stability as it is shown as a weight loss less than about 15% when heated up to a maximum of 300°C. An ultraviolet ray gel ink droplet or a solid ink droplet exhibits a contact angle exceeding about 50° and a sliding angle less than about 30° with respect to the coating surface. After said coating is exposed to a temperature of at least 290 °C and a pressure of at least 350 psi, said coating maintains said contact angle and sliding angle.