Invention Grant
US09096770B2 Inkjet recording ink set, ink cartridge, inkjet recording device, inkjet recording method, and image formed matter
有权
喷墨记录油墨组,墨盒,喷墨记录装置,喷墨记录方法和图像形成物
- Patent Title: Inkjet recording ink set, ink cartridge, inkjet recording device, inkjet recording method, and image formed matter
- Patent Title (中): 喷墨记录油墨组,墨盒,喷墨记录装置,喷墨记录方法和图像形成物
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Application No.: US14009253Application Date: 2012-04-02
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Publication No.: US09096770B2Publication Date: 2015-08-04
- Inventor: Shin Hasegawa , Hiroyuki Fushimi
- Applicant: Shin Hasegawa , Hiroyuki Fushimi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2011-081980 20110401
- International Application: PCT/JP2012/059616 WO 20120402
- International Announcement: WO2012/133953 WO 20121004
- Main IPC: C09D11/02
- IPC: C09D11/02 ; C09D11/326 ; C09D11/102 ; C09D11/322 ; C09D11/40 ; B41J2/01 ; B41J2/175

Abstract:
To provide an inkjet recording ink set, which contains a cyan ink, magenta ink, yellow ink, and black ink, wherein each ink contains at least a pigment, a surfactant, water, water-soluble organic solvent, and anionic self-emulsifying ether-based polyurethane, wherein each ink contains, as the pigment, a combination of a (i) pigment dispersion liquid, in which the pigment is dispersed in water with assistance of the surfactant, and a (ii) resinous polymer-coated pigment dispersion liquid, in which the pigment is coated with a resinous polymer and dispersed in water, and wherein the (i) pigment dispersion liquid and the (ii) resinous polymer-coated pigment dispersion liquid satisfy the following formula: |A−B|≦30 nm where A is the average particle diameter (D50) of the dispersed pigment in the (i) pigment dispersion liquid, and B is the average particle diameter (D50) of the dispersed resinous polymer-coated pigment in the (ii) pigment dispersion liquid.
Public/Granted literature
Information query
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