Abstract: Provided are a decorative sheet having stretchability and heat resistance and an in-mold forming method capable of forming in-mold injection formed products having excellent decorative image. A decorative sheet includes an image layer and an image running prevention region in order on a resin sheet, in which the image layer is a cured image of an ink composition containing (a) a polymerizable compound, (b) a polymerization initiator, and (c) a coloring agent; the image running prevention region is a cured layer of a composition for running prevention containing (a) a polymerizable compound, and (b) a polymerization initiator; and the image running prevention region has superior heat resistance to the image layer, and an injection forming method using the decorative sheet.

Abstract: An active energy ray-curable ink composition includes (component A) monofunctional radically polymerizable monomers, (component B) a polyfunctional oligomer having a glass transition temperature of 20° C. or lower and an acrylate value of 300 g/value or more, and (component C) a bifunctional radically polymerizable monomer having a viscosity at 25° C. of 15 mPa·s or less, wherein the component A includes an N-vinyl compound and a compound represented by the following formula (I), the content of the N-vinyl compound with respect to the total amount of the ink composition is from 10 to 50% by mass, and the content of the component A with respect to the total amount of the ink composition is 70% by mass or more.

Abstract: An ink pack is a laminate pack which at least one layer of an aluminum layer or an aluminum alloy layer and at least one layer of a plastic layer are laminated. An ultraviolet curable type inkjet ink composition which contains a compound having a nitroxyl radical, and has 1.2×1016 to 3.0×1019 of the spin number of the nitroxyl radical in one milliliter of the ink composition, is sealed in the ink pack.

Abstract: A decorative sheet includes a resin substrate, and an image layer that includes a fixed-ink image formed of an ink composition containing (a) a pigment, (b) polymer particles, (c) a water-soluble organic solvent, and (d) water, on the resin substrate. When a tensile test is performed on the decorative sheet in an atmosphere at 180° C., a stretching rate thereof that is defined as below is 150% or higher. Stretching rate (%)=[(length at the time of breakage?length before stretching)/(length before stretching)]×100.

Abstract: An ink set for forming a multilayer of the present invention includes a group of coloring ink compositions which include a yellow, a magenta, a cyan and a black ink composition, and a clear ink composition, wherein each of the coloring ink compositions contain a (component A) radical polymerizable compound, a (component B) radical polymerization initiator and a (component D) coloring agent, and the component A contains a (component A-1) N-vinyl compound and a (component A-2) specific ethylenic unsaturated compound (CTFA), the clear ink composition contains a (component A) radical polymerizable compound, a (component B) acylphosphine oxide-based photoinitiator and a (component C) surfactant, and the relation of 0.1?(Y/X)<1 is satisfied when the content of the radical polymerization initiator in the clear ink composition is X, the content of the radical polymerization initiator in the magenta ink composition is Y.

Abstract: An ink pack is a laminate pack which at least one layer of an aluminum layer or an aluminum alloy layer and at least one layer of a plastic layer are laminated. An ultraviolet curable type inkjet ink composition which contains a compound having a nitroxyl radical, and has 1.2×1016 to 3.0×1019 of the spin number of the nitroxyl radical in one milliliter of the ink composition, is sealed in the ink pack.

Abstract: A decorative sheet includes a resin substrate, and an image layer that includes a fixed-ink image formed of an ink composition containing (a) a pigment, (b) polymer particles, (c) a water-soluble organic solvent, and (d) water, on the resin substrate. When a tensile test is performed on the decorative sheet in an atmosphere at 180° C., a stretching rate thereof that is defined as below is 150% or higher.

Abstract: An active energy ray-curable ink composition includes (component A) monofunctional radically polymerizable monomers, (component B) a polyfunctional oligomer having a glass transition temperature of 20° C. or lower and an acrylate value of 300 g/value or more, and (component C) a bifunctional radically polymerizable monomer having a viscosity at 25° C. of 15 mPa·s or less, wherein the component A includes an N-vinyl compound and a compound represented by the following formula (I), the content of the N-vinyl compound with respect to the total amount of the ink composition is from 10 to 50% by mass, and the content of the component A with respect to the total amount of the ink composition is 70% by mass or more.

Abstract: An ink set for forming a multilayer of the present invention includes a group of coloring ink compositions which include a yellow, a magenta, a cyan and a black ink composition, and a clear ink composition, wherein each of the coloring ink compositions contain a (component A) radical polymerizable compound, a (component B) radical polymerization initiator and a (component D) coloring agent, and the component A contains a (component A-1) N-vinyl compound and a (component A-2) specific ethylenic unsaturated compound (CTFA), the clear ink composition contains a (component A) radical polymerizable compound, a (component B) acylphosphine oxide-based photoinitiator and a (component C) surfactant, and the relation of 0.1?(Y/X)<1 is satisfied when the content of the radical polymerization initiator in the clear ink composition is X, the content of the radical polymerization initiator in the magenta ink composition is Y.

Abstract: Provided are a decorative sheet having stretchability and heat resistance and an in-mold forming method capable of forming in-mold injection formed products having an excellent decorative image. A decorative sheet includes an image layer and an image running prevention region in order on a resin sheet, in which the image layer is a cured image of an ink composition containing (a) a polymerizable compound, (b) a polymerization initiator, and (c) a coloring agent; the image running prevention region is a cured layer of a composition for running prevention containing (a) a polymerizable compound, and (b) a polymerization initiator; and the image running prevention region has superior heat resistance to the image layer, and an injection forming method using the decorative sheet.