JP2003313465A5 - - Google Patents

Claims (21)

  A water-based ink composition for inkjet, comprising at least a resin emulsion in which fine particles of polyurethane resin are dispersed and having an elongation of 300% or less, and a coloring material. The water-based ink composition for ink jet according to claim 1, wherein the minimum film forming temperature of the resin emulsion is 25 ° C or lower.   The water-based ink composition for inkjet according to claim 1 or 2, wherein the polyurethane fine particles have an average particle size of 200 nm or less.   The water-based ink composition for inkjet according to any one of 1 to 3, wherein the content of the polyurethane fine particles is 1% by weight or more and 20% by weight or less.   The water-based ink composition for inkjet according to any one of claims 1 to 4, further comprising a wetting agent in a proportion of 5 wt% to 30 wt%.   6. The water-based ink composition for ink jet according to claim 1, wherein the coloring material is a water-soluble dye.   The aqueous ink composition for inkjet according to any one of claims 1 to 6, further comprising an acid ammonium salt.   The aqueous ink composition for ink jet according to claim 7, wherein the acid ammonium salt is diammonium hydrogen phosphate.   The aqueous ink composition for inkjet according to claim 7 or 8, wherein the content of the acid ammonium salt is 0.1 wt% or more and 10 wt% or less.   The aqueous inkjet ink according to any one of claims 1 to 9, wherein a rate of change of the average particle size of the polyurethane fine particles is 10% or less when stored in a sealed state at 70 ° C for 3 weeks. Composition.   The aqueous ink composition for inkjet according to any one of claims 1 to 10, wherein the pH is 4 or more and 12 or less.   The aqueous ink composition for inkjet according to any one of claims 1 to 11, wherein a pH change rate when stored in a sealed state at 70 ° C for 3 weeks is 10% or less.   The surface tension is 20 mN / m or more and 50 mN / m or less, The water-based ink composition for ink jet according to any one of claims 1 to 12.   The aqueous ink composition for inkjet according to any one of claims 1 to 13, wherein the rate of change in surface tension when stored in a sealed state at 70 ° C for 3 weeks is 10% or less.   Viscosity is 10 mPa * s or less, The aqueous ink composition for inkjets in any one of Claims 1-14 characterized by the above-mentioned.   The water-based ink composition for inkjet according to any one of claims 1 to 15, which has a viscosity change rate of 10% or less when stored in a sealed state at 70 ° C for 3 weeks.   An ink cartridge containing the ink-jet aqueous ink composition according to claim 1.   An ink jet printing apparatus that performs recording by discharging the aqueous ink composition for ink jet according to claim 1.   An image forming method, wherein an image is formed by the inkjet printing apparatus according to claim 18.   An image formed article formed by the inkjet printing apparatus according to claim 18.   21. The image formed article according to claim 20, wherein the image support is paper.