Abstract: Ink-jet print head for an ink-jet printer including at least a substrate and a photopolymer barrier applied onto the substrate. The photopolymer barrier includes an adhesive first layer and a second layer made of a photopolymerizable material and applied above said first layer. The adhesive first layer is made of a canonically polymerizable material partially polymerized that, when contacted by a water-based ink containing acidic species, is able to further polymerize, thus improving the photopolymer barrier adhesion on the surface of the substrate with time.

Abstract: Ink-jet print head for an ink-jet printer including at least a substrate and a photopolymer barrier applied onto the substrate. The photopolymer barrier includes an adhesive first layer and a second layer made of a photopolymerizable material and applied above said first layer. The adhesive first layer is made of a cationically polymerizable material partially polymerized that, when contacted by a water-based ink containing acidic species, is able to further polymerize, thus improving the photopolymer barrier adhesion on the surface of the substrate with time.

Abstract: The present invention relates to an ink-jet print head for an ink-jet printer comprising at least a substrate and a photopolymer barrier applied onto said substrate, said photopolymer barrier comprising an adhesive first layer and a second layer made of a photopolymerizable material and applied above said first layer, characterized in that said adhesive first layer is made of a cationically polymerizable material partially polymerized that, when contacted ny a water-based ink containing acidic species, is able to further polymerize, thus improving the photopolymer barrier adhesion on said surface of said substrate with time, the present invention also relates to a process of manufacturing said ink-jet print head and to its use in combination with a water-based ink containing acidic species.

Abstract: In a monolithic ink jet printhead, a structural layer is made comprising cavities, obtained from the polymerization of a solution of a monomer, or an oligomer, and a photointiator; during the polymerization by radiation, acid species are unduly generated in zones protected by a mask, due to reflection of the radiation on reflecting surfaces of the support of the sructural layer; these acid species cause undue polymerization of the solution on the inside of the cavities to oppose the formation of these acid species, a polymerzation inhibitor basic compound is used.

Abstract: The present invention relates to an ink-jet print head comprising a substrate, a structural or barrier layer defining ink passage ways, and, optionally, a nozzle plate, wherein a layer of polymeric material comprising carbon, hydrogen, and nitrogen atoms improves the adhesion of the layer defining ink passage ways with the substrate and/or the nozzle plate. The present invention also relates to a process of manufacturing an inkjet print head including the step of forming the layer of polymeric material comprising carbon, hydrogen, and nitrogen atoms with a plasma treatment.

Abstract: The present invention relates to a curable resin composition comprising a cyclic aliphatic multifunctional epoxy resin, a cyclic aliphatic difunctional epoxy resin having formula B in the specification, and, optionally, a photoinitiator, a process for manufacturing an ink jet printhead comprising a polymeric material layer defining ink passage ways formed by curing said curable resin composition, and ink-jet print head comprising a polymeric material layer defining ink passage ways formed by curing said curable resin composition.

Abstract: The present invention relates to an ink-jet print head for an ink-jet printer comprising at least a substrate and a photopolymer barrier applied onto said substrate, said photopolymer barrier comprising an adhesive first layer and a second layer made of a photopolymerisable material and applied above said first layer, characterized in that said adhesive first layer is made of a cationically polymerisable material partially polymerised that, when contacted ny a water-based ink containing acidic species, is able to further polymerise, thus improving the photopolymer barrier adhesion on said surface of said substrate with time, the present invention also relates to a process of manufacturing said ink-jet print head and to its use in combination with a water-based ink containing acidic species.

Abstract: The present invention relates to an ink-jet print head comprising a substrate, a structural or barrier layer defining ink passage ways, and, optionally, a nozzle plate, wherein a layer of polymeric material comprising carbon, hydrogen, and nitrogen atoms improves the adhesion of the layer defining ink passage ways with the substrate and/or the nozzle plate. The present invention also relates to a process of manufacturing an ink-jet print head including the step of forming the layer of polymeric material comprising carbon, hydrogen, and nitrogen atoms with a plasma treatment.

Abstract: The present invention relates to a curable resin composition comprising a cyclic aliphatic multifunctional epoxy resin having general formula of the specification, a cyclic aliphatic difunctional epoxy resin having general formula of the specification, and, optionally, a photoinitiator, a process for manufacturing an ink jet printhead comprising a polymeric material layer defining ink passage ways formed by curing said curable resin composition, and ink-jet print head comprising a polymeric material layer defining ink passage ways formed by curing said curable resin composition.

Abstract: In a monolithic ink jet printhead, a structural layer is made comprising cavities, obtained fron the polymerization of a solution of a monomer, or an oligomer, and a photointiator; during the polymerization by radiation, acid species are unduly generated in zones protected by a mask, due to reflection of the radiation on reflecting surfaces of the support of the sructural layer; these acid species cause undue polymerization of the solution on the inside of the cavities to oppose the formation of these acid species, a polymerzation inhibitor basic compound is used.

Abstract: An ink jet printing system includes an ink receiving sheet and an ink-jet printer. The ink receiving sheet includes a support, at least one receiving layer and a top coat layer. The ink-jet printer includes an ink-jet cartridge comprising an ink. The receiving layer includes a hydrophilic binder and a vinyl polymeric compound and has a total coverage weight of at least 12 g/m2, and the top coat layer is free of vinyl polymeric compounds and comprises a hydrophilic binder and a corn starch matting agent. The ink includes a dye selected from the group consisting of azo and disazo dye at a concentration higher than 4% by weight, in order to achieve an optical density higher than 3.00.

Abstract: An ink jet printing system comprises an ink receiving sheet and an ink-jet printer. The ink receiving sheet comprises a support, at least one receiving layer and a top coat layer. The ink-jet printer comprises an ink-jet cartridge comprising an ink. The receiving layer comprises a hydrophilic binder and a vinyl polymeric compound and has a total coverage weight of at least 12 g/m2, and the top coat layer is free of vinyl polymeric compounds and comprises a hydrophilic binder and a corn starch matting agent. The ink comprises a dye selected from the group consisting of azo and disazo dye at a concentration higher than 4% by weight, in order to achieve an optical density higher than 3.00.