Seiko Epson Corporation

Keiji Iida

Hiroshi Takahashi

Kenichiro Kubota

Makoto Nagase

Jun Ito

Naoki Koike

Akihito Sao

Yasunari Ikeda

Tomoki Shinoda

Tomohito Nakano

Shinichi Naito

Miho Nakamura

Maki Ito

Shugo Hattori

Maki Nariai

Keisuke Morita

Kenichi Numakura

A non-aqueous ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a cyclic ester compound, at least one first solvent represented by the following General Formula (1) and having a flash point of 140&#xb0; C. or lower: RO&#x2014;(RO)&#x2014;R, a second solvent represented by the General Formula (1), and C.I. Pigment Orange-43 (PO-43) as a pigment. In the at least one first solvent represented by General Formula (1), Rand Reach independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, Rrepresents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6. The second solvent represented by General Formula (1) includes a glycol monoether compound in which at least one of Rand Ris hydrogen. A volume average particle diameter of the PO-43 is 100 nm or more and 400 nm or less.

Ink jet ink composition, ink jet recording method, and ink set

An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes at least one solvent represented by RO&#x2014;(RO)&#x2014;Rand having a flash point of 140&#xb0; C. or lower and C.I. Pigment Orange-43 (PO-43) as a pigment, wherein Rand Reach independently represent hydrogen or an alkyl group having 1 to 5 carbon atoms, Rrepresents an alkylene group having 2 or 3 carbon atoms, and m represents an integer of 2 to 6.

An ink composition includes a solvent containing at least one compound represented by the following general formula (1):RO&#x2014;(RO)&#x2014;R&#x2003;&#x2003;(1)

Ink jet composition and ink jet recording method

An ink jet ink composition is provided that can form an image having excellent weather resistance, abrasion resistance, and coloring property. The non-aqueous ink jet ink composition includes a solvent containing at least one cyclic ester compound; and C.I. Pigment Orange-43 (PO-43) as a pigment.

Ink jet ink composition and ink jet recording method

An aqueous ink composition contains: an alkanediol having a normal boiling point of 240&#xb0; C. or higher; polyoxyethylene mono(2-ethylhexyl) ether having a carbon number of 14 or more and 22 or less; and water, in which a content of the polyoxyethylene mono(2-ethylhexyl) ether having a carbon number of 14 or more and 22 or less is 0.4% by mass or lower based on the total amount of the aqueous ink composition.

Aqueous ink composition and ink jet recording apparatus

An ink composition set has at least a solvent-based orange ink composition containing an orange pigment as a pigment and a solvent and a solvent-based red ink composition containing a red pigment as a pigment and a solvent.

Ink composition set

An ink jet recording method including causing ink to adhere to a recording medium by ejecting an ink composition using a print head provided with a nozzle, a pressure chamber, and a connection portion which connects the pressure chamber and the nozzle to each other at a length of 500 &#x3bc;m or more, in which the ink composition includes a coloring material and a solvent represented by General Formula (1) below at 30 mass % or more with respect to a total mass of the ink composition,RO&#x2014;(RO)&#x2014;R&#x2003;&#x2003;(1)(in General Formula (1), Rand Reach independently represent a hydrogen or an alkyl group with 1 to 5 carbon atoms and at least one of Rand Ris an alkyl group with 1 to 5 carbon atoms, Rrepresents an alkylene group with 2 to 4 carbon atoms, and n represents an integer of 1 to 6).

Ink jet recording method using a printhead having a pressure chamber connected to a nozzle with a connection portion

Provided is a method for maintaining an ink jet recording apparatus according to the invention in an ink jet recording apparatus which performs recording using a solvent-based ink composition which includes at least one type of organic solvent selected from a group consisting of an ester-based solvent, a hydrocarbon-based solvent, and an alcohol-based solvent, the method including wiping a nozzle forming member, in which nozzles of a head which discharges the solvent-based ink composition are formed, using an impregnation solution and a wiping member with liquid absorbency, in which the impregnation solution contains at least one type of organic solvent selected from a group consisting of a compound which is represented by General Formula (1) below, esters, and dibasic acid esters,R&#x2014;O&#x2014;(R&#x2014;O)&#x2014;R&#x2003;&#x2003;(1)(in General Formula (1) described above, Rrepresents a hydrogen atom, an aryl group, or an alkyl group with 1 to 6 carbon atoms, Rrepresents an alkylene group with 2 to 4 carbon atoms, Rrepresents an aryl group or an alkyl group with 1 to 6 carbon atoms, and n represents an integer of 1 to 9).

Ink jet recording apparatus and method for maintaining the same

A nonaqueous ink jet ink composition according to the invention includes a solvent including at least one compound represented by the following formula (1), and a pigment including a pigment orange 43 (PO-43), in which a Na amount included in the ink is 5 ppm to 500 ppm.RO&#x2014;(RO)&#x2014;R&#x2003;&#x2003;(1)

Nonaqueous ink jet ink composition

A non-aqueous ink composition for ink jet recording includes a pigment, a compound represented by General formula 1 below, and a phthalocyanine derivative provided with a polar group not having an amine structure, as a pigment dispersant for dispersing the pigment. The pigment is carbon black. The composition further includes an alkylene glycol monoalkyl ether: (wherein Rindicates an alkyl group of 1 to 4 carbon atoms, and Rand Reach independently indicate a methyl group or an ethyl group).

Ink composition for ink jet recording

An ink composition for ink jet recording, containing: a dye; organic solvents; and water, wherein a ratio (S/S) of a content (S) of the first organic solvent and a content (S) of the second organic solvent being 15.3 or more and 205 or less: and wherein the organic solvents including a first organic solvent satisfying a following property (A) and a second organic solvent not satisfying the property (A), and property (A): when a mixture with polyvinyl alcohol is produced, a cluster having a mass of 70% or more based on a total mass of the mixture is formed and when a load of 5.3 g/mmor more and 7.1 g/mmor less is applied to the cluster, a cluster having a mass of 90% or more based on a total mass of the cluster is formed.

Ink composition for ink jet recording and ink jet recording method

Disclosed is ink composition used in a recording apparatus provided with a pressure regulation valve which performs opening and closing operations to adjust a pressure in a recording head and is covered with an elastic member. The ink composition includes a slip agent and a lactone system medium. The slip agent is preferably at least one kind selected from a group consisting of a silicon system compound, a hydrocarbon system compound, a fluorine system compound, an amide system compound, and acrylic compound. In addition, the content of the slip agent is preferably not more than 1% by mass.

Ink composition and recording apparatus

The nonaqueous ink composition for ink jet printing contains a compound represented by General Formula (1) below, and a heterocyclic compound selected from lactones and lactams. (In Formula (1), Rrepresents an alkyl group having 1 to 4 carbon atoms, and Rand Rrepresent a methyl group or an ethyl group.)

Nonaqueous ink composition for ink jet recording and ink jet recording method

A non-aqueous cleaning liquid which is used for cleaning an ink flow path, through which a non-aqueous ink is circulated, in an ink jet recording apparatus including the ink flow path and with which a container composed of polyolefin is filled, includes a pigment and an organic solvent. In the non-aqueous cleaning liquid, a content of the pigment is 0.001% by mass to 0.5% by mass and an average particle size (d50) of the pigment is 10 nm to 500 nm.

Non-aqueous cleaning liquid and cleaning method

The nonaqueous ink composition for ink jet recording according to the invention includes a compound represented by the General Formula (1) below; and a compound represented by the General Formula (2A) or the General Formula (2B) below. In the General Formula (1), Rrepresents an alkyl group having 1 to 4 carbon atoms, and Rand Rrepresent a methyl group or an ethyl group; in the General Formula (2A), Rrepresents an alkyl group having 5 to 9 carbon atoms, and Rrepresents a methyl group or an ethyl group; in the General Formula (2B), Rrepresents an alkylene group having 2 to 5 carbon atoms, and Rand Reach independently represent alkyl groups having 1 to 4 carbon atoms.

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Chikuhoku, Japan

Keiji Iida