JP2002088289A5 - - Google Patents
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- JP2002088289A5 JP2002088289A5 JP2001188703A JP2001188703A JP2002088289A5 JP 2002088289 A5 JP2002088289 A5 JP 2002088289A5 JP 2001188703 A JP2001188703 A JP 2001188703A JP 2001188703 A JP2001188703 A JP 2001188703A JP 2002088289 A5 JP2002088289 A5 JP 2002088289A5
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- ink
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- 239000000049 pigment Substances 0.000 description 27
- 239000002245 particle Substances 0.000 description 9
- 239000002270 dispersing agent Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 125000000129 anionic group Chemical group 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atoms Chemical group C* 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005315 distribution function Methods 0.000 description 1
- 125000004435 hydrogen atoms Chemical group [H]* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000004957 naphthylene group Chemical group 0.000 description 1
- 230000003287 optical Effects 0.000 description 1
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 description 1
Description
【特許請求の範囲】
【請求項１】 色材として第１の顔料及び第２の顔料を水性媒体中に分散状態で含むインクであって、
該第１の顔料が少なくとも１つのアニオン性の基が直接もしくは他の原子団を介して該第１の顔料の表面に結合されている自己分散型の顔料もしくは少なくとも１つのカチオン性の基が直接もしくは他の原子団を介して該第１の顔料の表面に結合されている自己分散型の顔料であり、
該第２の顔料が高分子分散剤によって該水性媒体に分散させることのできる顔料であり、
該インクは更に該第１の顔料の表面に結合されている基と同極性の高分子分散剤及びノニオン性の高分子分散剤の少なくとも一方を含み、
該インク粒径ｘの分布関数において極値を一つ有し、且つ極値でのインク粒径が５０〜３００ｎｍであることを特徴とするインク。
【請求項２】 前記顔料の表面に結合しているアニオン性基が、−ＣＯＯＭ、−ＳＯ3Ｍ、−ＰＯ3ＨＭ及び−ＰＯ3Ｍ2からなる群から選択される少なくとも１つのアニオン性基であり、式中のＭは水素原子、アルカリ金属、アンモニウム又は有機アンモニウムを表わす請求項１に記載のインク。
【請求項３】 前記他の原子団は、炭素数１〜１２の置換もしくは未置換のアルキレン基、置換もしくは未置換のフェニレン基、または置換もしくは未置換のナフチレン基である請求項１または２に記載のインク。
【請求項４】 前記第１の顔料の８０％以上が、５０〜３００ｎｍの粒径である請求項１ないし３のいずれかに記載のインク。
【請求項５】 前記第１の顔料の８０％以上が、１００〜２５０ｎｍの粒径である請求項１ないし４のいずれかに記載のインク。
【請求項６】 前記第２の顔料がその表面に高分子分散剤を吸着することにより分散されている請求項１ないし５のいずれかに記載のインク。
【請求項７】 前記第２の顔料が、少なくとも構造の異なる２種類の顔料を含む請求項１ないし６のいずれかに記載のインク。
【請求項８】 前記第１の顔料を前記第２の顔料よりも多く含む請求項１ないし７のいずれかに記載のインク。
【請求項９】 前記第１及び第２の顔料の少なくとも一方は、カーボンブラックであることを特徴とする請求項１ないし８のいずれかに記載のインク。
【請求項１０】 該インクが更に該第１の顔料の表面に結合されている基と同極性の染料を含んでいる請求項１ないし９のいずれかに記載のインク。
【請求項１１】 該インクがインクジェット用である請求項１ないし１０のいずれかに記載のインク。
【請求項１２】 請求項１１に記載のインクを収容しているインク収容部を具備していることを特徴とするインクカートリッジ。
【請求項１３】 請求項１１に記載のインクを収容しているインク収容部、及び該インクを吐出するインクジェットヘッドを具備していることを特徴とする記録ユニット。
【請求項１４】 請求項１１に記載のインクを収容しているインク収容部と、該インクを吐出する記録ヘッドとを備えていることを特徴とするインクジェット記録装置。
【請求項１５】 請求項１１に記載のインクをインクジェット法で吐出させる工程を有することを特徴とするインクジェット記録方法。
[Claims]
1. An ink containing a first pigment and a second pigment as a coloring material in a dispersed state in an aqueous medium,
The first pigment is a self-dispersible pigment in which at least one anionic group is bonded directly or via another atomic group to the surface of the first pigment, or at least one cationic group is directly bonded to the surface of the first pigment. Or a self-dispersing pigment bonded to the surface of the first pigment via another atomic group,
The second pigment is a pigment that can be dispersed in the aqueous medium by a polymer dispersant,
The ink further includes at least one of a polymer dispersant having the same polarity as the group bonded to the surface of the first pigment and a nonionic polymer dispersant,
An ink characterized by having one extreme value in the distribution function of the ink particle size x, and the ink particle size at the extreme value is 50 to 300 nm.
2. An anionic group bonded to the surface of the pigment is -COOM, -SOThreeM, -POThreeHM and -POThreeMTwoThe ink according to claim 1, wherein the at least one anionic group is selected from the group consisting of: wherein M represents a hydrogen atom, an alkali metal, ammonium or an organic ammonium.
3. The other atomic group is a substituted or unsubstituted alkylene group having 1 to 12 carbon atoms, a substituted or unsubstituted phenylene group, or a substituted or unsubstituted naphthylene group.Claim 1 or 2The ink according to the above.
4. 80% or more of the first pigment isParticle size of 50-300nmIsClaims 1 to 3An ink according to any one of
5. 80% or more of the first pigment is:Particle size of 100-250nmIsAny of claims 1 to 4The ink according to the above.
6. The second pigment is dispersed by adsorbing a polymer dispersant on its surface.Any of claims 1 to 5The ink according to the above.
7. The second pigment contains at least two kinds of pigments having different structures.Any one of claims 1 to 6The ink according to the above.
8. The composition according to claim 1, wherein the first pigment is more than the second pigment.Any one of claims 1 to 7The ink according to the above.
9. The method according to claim 1, wherein at least one of the first and second pigments is carbon black.Any one of claims 1 to 8The ink according to the above.
10. The ink further comprises a dye of the same polarity as the group attached to the surface of the first pigment.Any of claims 1 to 9The ink according to the above.
11. The ink is for ink jet.Any of claims 1 to 10The ink according to the above.
12. Claim 11An ink cartridge, comprising: an ink storage unit that stores the ink described in (1).
Claim 13 Claim 11A recording unit, comprising: an ink container that stores the ink described in 1); and an inkjet head that discharges the ink.
14. Claim 11An ink jet recording apparatus, comprising: an ink container that stores the ink described in 1); and a recording head that discharges the ink.
15. Claim 11An ink jet recording method, comprising the step of discharging the ink described in (1) by an ink jet method.
そして本発明にかかるインクが、上記した種々の効果を奏する理由は明らかでないが、第１の顔料の粒径と第２の顔料の粒径とが比較的近接することになり、それによって、前述した第１の顔料と第２の顔料との相互作用がより効率的に生じる為ではないかと考えられる。また、インク粒径の極値を５０〜３００ｎｍの範囲内とすることで、光学濃度を低下させる原因となる微小な顔料粒子や、吐出安定性を低下させることがある大きな顔料粒子をインク中から実質的に排除できるものと考えられる。 Although it is not clear why the ink according to the present invention exhibits the various effects described above, the particle diameter of the first pigment and the particle diameter of the second pigment are relatively close to each other. It is considered that the interaction between the first pigment and the second pigment occurs more efficiently. Further, by setting the extreme value of the ink particle diameter in the range of 50 to 300 nm, minute pigment particles which may lower the optical density and large pigment particles which may lower the ejection stability may be used in the ink. It can be considered that it can be substantially excluded from
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001188703A JP4996018B2 (en) | 2000-06-21 | 2001-06-21 | Ink, inkjet recording method, ink cartridge, recording unit, and inkjet recording apparatus |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000187018 | 2000-06-21 | ||
| JP2000187018 | 2000-06-21 | ||
| JP2000-187018 | 2000-06-21 | ||
| JP2001188703A JP4996018B2 (en) | 2000-06-21 | 2001-06-21 | Ink, inkjet recording method, ink cartridge, recording unit, and inkjet recording apparatus |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2002088289A JP2002088289A (en) | 2002-03-27 |
| JP2002088289A5 true JP2002088289A5 (en) | 2008-08-07 |
| JP4996018B2 JP4996018B2 (en) | 2012-08-08 |
Family
ID=26594417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001188703A Expired - Fee Related JP4996018B2 (en) | 2000-06-21 | 2001-06-21 | Ink, inkjet recording method, ink cartridge, recording unit, and inkjet recording apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4996018B2 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004059913A (en) * | 2002-06-03 | 2004-02-26 | Ricoh Co Ltd | Ink for recording and its preparing method as well as ink cartridge, inked record, inkjet recording device, and inkjet recording method |
| EP1526162B1 (en) * | 2002-06-03 | 2014-03-05 | Ricoh Company, Ltd. | Recording ink, process for producing the same, ink cartridge, ink-recorded matter, ink-jet recorder, and method of ink-jet recording |
| US7055944B2 (en) | 2002-06-03 | 2006-06-06 | Ricoh Company, Ltd. | Recording ink and manufacturing method thereof, ink cartridge, ink recorded matter, inkjet recording apparatus, and inkjet recording method |
| JP4534416B2 (en) * | 2002-12-02 | 2010-09-01 | コニカミノルタホールディングス株式会社 | Actinic ray curable inkjet solventless ink and image forming method using the same |
| CN100369985C (en) * | 2002-12-27 | 2008-02-20 | 佳能株式会社 | Water-based ink, ink jet recording method, ink cartridge, recording unit, ink jet recording apparatus, and image forming method |
| JP5211440B2 (en) * | 2006-06-15 | 2013-06-12 | 富士ゼロックス株式会社 | Emulsion ink for ink jet and method for producing the same, ink jet recording method and recorded matter |
| JP2008174736A (en) * | 2006-12-20 | 2008-07-31 | Canon Inc | Aqueous ink, ink jet recording method, ink cartridge, and ink jet recording apparatus |
| JP5369466B2 (en) * | 2008-03-25 | 2013-12-18 | コニカミノルタ株式会社 | Water-based ink for ink jet and ink jet recording method |
| JP5725396B2 (en) | 2010-04-30 | 2015-05-27 | 株式会社リコー | Inkjet recording ink, recording apparatus using the same, and recorded matter |
| DE112014001322T5 (en) * | 2013-03-12 | 2016-01-14 | Cabot Corporation | Aqueous dispersions comprising nanocrystalline cellulose and compositions for commercial inkjet printing |
| EP3392321B1 (en) * | 2015-12-18 | 2020-11-04 | Kao Corporation | Method for producing aqueous pigment dispersion |
| JP2018065956A (en) * | 2016-10-21 | 2018-04-26 | キヤノン株式会社 | Ink, ink cartridge, and image recording method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6852156B2 (en) * | 2000-06-05 | 2005-02-08 | E.I. Du Pont De Nemours And Company | Self-dispersing pigment and process of making and use of same |
| JP3475249B2 (en) * | 1996-07-25 | 2003-12-08 | 株式会社リコー | Recording liquid and recording method using the same |
| JP4235329B2 (en) * | 1998-12-22 | 2009-03-11 | キヤノン株式会社 | Ink, ink container, ink set, ink jet recording apparatus and ink jet printing method |
| US6646024B2 (en) * | 1999-12-14 | 2003-11-11 | Lexmark International, Inc. | Ink compositions |
| JP2001254039A (en) * | 2000-01-06 | 2001-09-18 | Seiko Epson Corp | Ink composition capable of realizing picture image excellent in color development and fixability |
| JP3589408B2 (en) * | 2000-04-10 | 2004-11-17 | セイコーエプソン株式会社 | Coating liquid, image recording method using the same, and recorded matter |
-
2001
- 2001-06-21 JP JP2001188703A patent/JP4996018B2/en not_active Expired - Fee Related
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