Recording fluid and recording method using the same
OwnerHideki Sekiguchi, Hiroyuki Nakashinden +1inventors
InventorsHideki Sekiguchi, Hiroyuki Nakashinden, Masnaobu Hida
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Abstract
Disclosed is a recording liquid essentially composed of water, a coloring material, an organic solvent and a surfactant. The surfactant is composed of a specified ethylene oxide/propylene oxide/ethylene oxide block copolymer, a specified ethylene oxide/butylene oxide/ethylene oxide block copolymer or a specified propylene oxide/ethylene oxide/propylene oxide block copolymer. The recording liquid is superior in ejection stability and high in optical density even on multi-color recording letters/characters or images on an ordinary paper sheet so that it allows for high quality recording free of boundary bleeding or all-over color unevennesses otherwise caused by color mixing.
Claims5
1-4. (canceled)
A recording liquid consisting essentially of water, a coloring material, an organic solvent and a surfactant, wherein the surfactant contains at least one of an ethylene oxide/propylene oxide block copolymer and an ethylene oxide/butylene oxide block copolymer represented by the following chemical formulas (1) to (3):
- HO(C2H4O)l(C3H6O)m(C2H4O)nH (1)
- where l, m and n are integers such that 0<1+n≦10 and 16≦m≦31 and a content of the ethylene oxide unit in a molecule ranges from about 10 wt % to about 20 wt %;
- HO(C2H4O)p(C4H8O)q(C2H4O)rH (2)
- where p, q and r are integers such that 0<p+r≦13 and 13≦q≦24 and a content of the ethylene oxide unit in a molecule ranges from about 10 wt % to about 30 wt %;
- HO(C3H6O)x(C2H4O)y(C3H6O)nH (3)
- where x, y and z are integers such that 12≦x+z≦31 and 0<y≦18 and a content of the ethylene oxide unit in a molecule ranges from about 20 wt % to about 30 wt %.
A recording method comprising ejecting micro-sized droplets of a recording liquid via a plurality of nozzles, depending on recording signals, for depositing the liquid droplets on a recording support, wherein
- the recording liquid consists essentially of water, a coloring material and a surfactant, where the surfactant contains at least one of an ethylene oxide/propylene oxide block copolymer and an ethylene oxide/butylene oxide block copolymer represented by the following chemical formulas (1) to (3):
- HO(C2H4O)l(C3H6O)m(C2H4O)nH (1)
- where l, m and n are integers such that 0<1+n≦10 and 16≦m≦31 and a content of the ethylene oxide unit in a molecule ranges from about 10 wt % to about 20 wt %;
- HO(C2H4O)p(C4H8O)q(C2H4O)rH (2)
- where p, q and r are integers such that 0<p+r≦13 and 13≦q≦24 and a content of the ethylene oxide unit in a molecule ranges from about 10 wt % to about 30 wt %;
- HO(C3H60)x(C2H40)y(C3H60)zH (3)
- where x, y and z are integers such that 12≦x+z≦31 and 0<y≦18 and a content of the ethylene oxide unit in a molecule ranges from about 20 wt % to about 30 wt %.
Dependencies are inferred from the claim text.