Abstract: The present disclosure relates to an electrophotographic printing method comprising electrophotographically printing a liquid electrophotographic composition onto a substrate. The liquid electrophotographic composition comprises a charge adjuvant and a copolymer of a) ethylene and b) methacrylic acid and/or acrylic acid, wherein 80 to 95 weight % of the units of said copolymer are derived from ethylene. The printed substrate is then subjected to electron beam (EB) radiation.

Abstract: A process for preparing a flexible packaging material (6) by laminating at a temperature greater or equal to 50° C. a printed substrate coated with a primer (4) comprising poly(acrylic acid) and/or poly(methacrylic acid) with another substrate coated with a thermal active material (2), to prepare a high performance flexible packaging multilayer material (6) showing improved shelf-life, without requiring curing stage of intermediate layers.

Abstract: Described herein is a process for preparing a flexible packaging material (6). The process may comprise: providing a base material (1) having a first surface (1a) and a second surface (1b), the first surface (1a) having an electrostatic ink composition (4) printed thereon; providing a sealant layer (3) on the second surface (1b) of the base material (1); providing a flexible substrate (4) on which a thermally activatable laminating layer (5) has been deposited; and contacting under conditions of heat and/or pressure the thermally activatable laminating layer (5) disposed on the flexible substrate (4) with the first surface (1a) of the base material (1) on which the electrostatic ink composition (4) is printed.

Abstract: The present disclosure relates to an electrophotographic printing method comprising electrophotographically printing a liquid electrophotographic composition onto a substrate. The liquid electrophotographic composition comprises a charge adjuvant and a copolymer of a) ethylene and b) methacrylic acid and/or acrylic acid, wherein 80 to 95 weight % of the units of said copolymer are derived from ethylene. The printed substrate is then subjected to electron beam (EB) radiation.

Abstract: Described herein is a process for preparing a flexible printed material. The process may comprise providing a flexible print substrate comprising a primer on a surface of the print substrate, the primer comprising a primer resin; printing an ink composition comprising a thermoplastic resin onto the primer on the surface of the print substrate; and depositing a cross-linking composition comprising a cross-linker onto the printed ink composition disposed on the primer such that the thermoplastic resin of the ink composition is crosslinked and the primer resin of the primer is crosslinked.

Abstract: A process for preparing a flexible packaging material (6) by laminating at a temperature greater or equal to 50° C. a printed substrate comprising a primer resin (4) with another substrate coated with a thermal active material (2) consisting of a polymer having an ester of acrylic or methacrylic acid content greater than or equal to 17% by weight, to prepare a high performance flexible packaging multilayer material (6) showing improved shelf-life, without requiring curing stage of intermediate layers (1-5).

Abstract: Described herein is a process for preparing a flexible packaging material. The process may comprise: providing a first flexible substrate; printing an ink composition comprising a thermoplastic resin onto the first flexible substrate; depositing a cross-linking composition comprising a cross-linker onto the printed ink composition such that the thermoplastic resin of the ink composition is crosslinked; and laminating the first flexible substrate with a second flexible substrate such that the ink composition and the cross-linker are disposed between the first and second flexible substrates.

Abstract: A process for preparing a flexible packaging material (6) by laminating at a temperature greater or equal to 50° C. a printed substrate coated with a primer (4) comprising poly(acrylic acid) and/or poly(methacrylic acid) with another substrate coated with a thermal active material (2), to prepare a high performance flexible packaging multilayer material (6) showing improved shelf-life, without requiring curing stage of intermediate layers.

Abstract: A liquid electrophotographic composition is described, which comprises a carrier liquid, a polymer resin comprising a copolymer of an alkylene monomer and a monomer selected from acrylic acid and methacrylic acid, and at least 5 wt. % of an optical brightening agent based on the total solids content of the composition.

Abstract: A liquid electrophotographic composition is described, which comprises a carrier liquid, a polymer resin comprising a copolymer of an alkylene monomer and a monomer selected from acrylic acid and methacrylic acid, and at least 5 wt. % of an optical brightening agent based on the total solids content of the composition.

Abstract: Described herein is a process for preparing a flexible packaging material (6). The process may comprise: providing a base material (1) having a first surface (1a) and a second surface (1b), the first surface (1a) having an electrostatic ink composition (4) printed thereon; providing a sealant layer (3) on the second surface (1b) of the base material (1); providing a flexible substrate (4) on which a thermally activatable laminating layer (5) has been deposited; and contacting under conditions of heat and/or pressure the thermally activatable laminating layer (5) disposed on the flexible substrate (4) with the first surface (1a) of the base material (1) on which the electrostatic ink composition (4) is printed.

Abstract: Described herein is a process for preparing a flexible printed material. The process may comprise providing a flexible print substrate comprising a primer on a surface of the print substrate, the primer comprising a primer resin; printing an ink composition comprising a thermoplastic resin onto the primer on the surface of the print substrate; and depositing a cross-linking composition comprising a cross-linker onto the printed ink composition disposed on the primer such that the thermoplastic resin of the ink composition is crosslinked and the primer resin of the primer is crosslinked.

Abstract: A method for determining coat weight of a transparent primer coating for liquid electrophotographic printing processes is described, in which an optical brightening agent is added to an aqueous transparent primer composition in an amount of less than 0.1 wt. % based on the total solids content of the primer composition to produce a test composition, the test composition is applied onto a test substrate to produce a transparent primer coating, the fluorescence of the transparent primer coating is measured, and the coat weight of the transparent primer coating based on the fluorescence of the transparent primer coating is determined.

Abstract: A method for determining coat weight of a transparent primer coating for liquid electrophotographic printing processes is described, in which an optical brightening agent is added to an aqueous transparent primer composition in an amount of less than 0.1 wt. % based on the total solids content of the primer composition to produce a test composition, the test composition is applied onto a test substrate to produce a transparent primer coating, the fluorescence of the transparent primer coating is measured, and the coat weight of the transparent primer coating based on the fluorescence of the transparent primer coating is determined.