Ink for inkjet recording apparatuses, and method for forming image
AssigneeKYOCERA Document Solutions Inc.
InventorNoriaki Ozawa
Life of this patent
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Abstract
An ink for inkjet recording apparatuses is provided in which an adsorbed resin proportion calculated from a total resin mass and a free resin mass in the ink is at least 0.95 and less than 1.00, the ink containing in specific amounts, respectively: water; a pigment dispersion including a resin with a molecular weight in the range of 35,000 to 140,000 and a specific amount of pigment; glycerin and 1,3-propanediol as humectants; and 1,2-octanediol, which has 8 carbon atoms, as a high penetrating agent, and further containing a C2-C4 monoalkyl ether of a polyhydric alcohol as a penetrating agent.
Claims6
An ink for inkjet recording apparatuses comprising at least water, a pigment dispersion, a high penetrating agent, a penetrating agent and a humectant, wherein
- the pigment dispersion contains a resin having a molecular weight in the range of 35,000 to 140,000 and a pigment,
- an adsorbed resin proportion, obtained using the following formula from the mass of a total amount of the resin in the ink and an amount of resin separated from pigment among the resin, is at least 0.95 and less than 1.00:
- adsorbed resin proportion=1−(free resin mass/total resin mass),
- the content of the pigment in the ink is in the range of 4% by mass to 9.5% by mass,
- the humectant is glycerin and 1,3-propanediol,
- the content of glycerin in the ink is at least 5% by mass, and the content of 1,3-propanedial is in the range of 10% by mass to 30% by mass,
- the high penetrating agent is 1,2-octanediol,
- the content of the high penetrating agent in the ink is in the range of 0.2% by mass to 0.8% by mass, and
- the penetrating agent is a C2-C4 monoalkyl ether of a polyhydric alcohol.
Dependencies are inferred from the claim text.