JPH04220473A - Recording fluid - Google Patents
Recording fluidInfo
- Publication number
- JPH04220473A JPH04220473A JP2412593A JP41259390A JPH04220473A JP H04220473 A JPH04220473 A JP H04220473A JP 2412593 A JP2412593 A JP 2412593A JP 41259390 A JP41259390 A JP 41259390A JP H04220473 A JPH04220473 A JP H04220473A
- Authority
- JP
- Japan
- Prior art keywords
- water
- recording liquid
- recording
- parts
- viscosity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 title abstract 3
- 239000007788 liquid Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000000049 pigment Substances 0.000 claims abstract description 12
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 10
- 239000002270 dispersing agent Substances 0.000 claims abstract description 7
- 239000001023 inorganic pigment Substances 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000012860 organic pigment Substances 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 8
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 8
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 8
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 235000019646 color tone Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 description 1
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical group C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- CJOBVZJTOIVNNF-UHFFFAOYSA-N cadmium sulfide Chemical compound [Cd]=S CJOBVZJTOIVNNF-UHFFFAOYSA-N 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 235000012736 patent blue V Nutrition 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、全体が圧電素材で作製
された記録ヘッドを用いるインクジェット記録用の記録
液に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording liquid for ink jet recording using a recording head made entirely of piezoelectric material.
【０００２】0002
【従来の技術】インクジェット記録は、低騒音で高速印
字が可能な記録方法であり、最近急速に普及しつつある
記録方法である。このようなインクジェット記録は、記
録液を加熱あるいは加圧といった方法により液滴として
吐出し、これを紙等の被記録部材に付着させて記録を行
うものである。2. Description of the Related Art Inkjet recording is a recording method that enables high-speed printing with low noise, and is a recording method that is rapidly becoming popular in recent years. In such inkjet recording, recording is performed by ejecting a recording liquid as droplets by heating or pressurizing the recording liquid, and making the droplets adhere to a recording member such as paper.
【０００３】インクジェット記録に用いられる記録液の
一つに、水を液媒体とし、これに記録剤である染料ある
いは顔料を添加した水系記録液がある。One of the recording liquids used in ink jet recording is an aqueous recording liquid in which water is used as a liquid medium and a dye or pigment as a recording agent is added thereto.
【０００４】0004
【発明が解決しようとする課題】加圧により液滴を形成
する方式の記録ヘッドは一般に、記録液室壁面の一部に
圧電素材を積層し、その圧電素材の変形により記録液の
液滴を吐出する。このような記録ヘッドの場合、作用部
分の面積が小さく圧電素材の変位量も小さいので、記録
液の粘度が高いと吐出は困難であった。そのため従来の
記録液は２５℃における粘度が１０ｃｐ以下、通常１〜
３ｃｐでなければならないという制約を受けていた。こ
のため従来の記録液は特に耐水性に劣るものであった。[Problems to be Solved by the Invention] Recording heads that form droplets by applying pressure generally have a piezoelectric material laminated on a part of the wall surface of the recording liquid chamber, and the deformation of the piezoelectric material forms droplets of recording liquid. Exhale. In the case of such a recording head, since the area of the active portion is small and the amount of displacement of the piezoelectric material is also small, it is difficult to eject the recording liquid if the viscosity is high. Therefore, conventional recording liquids have a viscosity of 10 cp or less at 25°C, usually 1~
There was a restriction that it had to be 3 cp. For this reason, conventional recording liquids have particularly poor water resistance.
【０００５】また、水系記録液は液滴を吐出するために
印加する電圧の違いやノズル先端の濡れの違いによって
、液滴の大きさが変化したり、あるいは液滴が大きくな
り解像力が低下するという問題があった。また、普通紙
への印字が耐光性あるいは耐水性に劣るという問題もあ
った。[0005] Furthermore, with aqueous recording liquid, the size of the droplets may change due to differences in the voltage applied to eject the droplets or differences in the wetness of the nozzle tip, or the droplets may become larger, resulting in a decrease in resolution. There was a problem. There was also the problem that printing on plain paper had poor light fastness or water resistance.
【０００６】そこで本発明は、適切な大きさの液滴が安
定に吐出し、かつ普通紙への印字が耐光性や耐水性に優
れた記録液の提供を目的とするものである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a recording liquid that can stably eject droplets of an appropriate size and that can be printed on plain paper with excellent light resistance and water resistance.
【０００７】[0007]
【課題を解決するための手段】本発明の記録液は、イン
クジェット記録用の記録液において、少なくとも平均粒
径が１μｍ以下の顔料、分散剤としての水溶性高分子、
および水を含有し、２５℃における粘度が５ｃｐ以上３
０ｃｐ以下であることを特徴とするものである。[Means for Solving the Problems] The recording liquid of the present invention is a recording liquid for inkjet recording, which includes at least a pigment having an average particle diameter of 1 μm or less, a water-soluble polymer as a dispersant, and a water-soluble polymer as a dispersant.
and water, and has a viscosity of 5 cp or more at 25°C3
It is characterized by being 0 cp or less.
【０００８】上記平均粒径が１μｍ以下の顔料としては
有機または無機顔料を使用することができる。また、上
記水溶性高分子としては融点が５０℃以上のものが好ま
しい。さらに上記記録液に水溶性低分子を添加すること
もできる。[0008] As the pigment having an average particle size of 1 μm or less, organic or inorganic pigments can be used. The water-soluble polymer preferably has a melting point of 50° C. or higher. Furthermore, water-soluble low molecules can also be added to the recording liquid.
【０００９】[0009]
【作用】本発明の記録液は全体を圧電素材で作製した記
録ヘッド用の記録液である。この記録ヘッドは記録液室
全体を変形させることが容易であり、高粘度の記録液で
も吐出できるという特徴をもっている。[Operation] The recording liquid of the present invention is a recording liquid for a recording head made entirely of piezoelectric material. This recording head is characterized in that the entire recording liquid chamber can be easily deformed, and even highly viscous recording liquid can be ejected.
【００１０】インクジェットプリンタで記録液の吐出口
は通常数十μｍ程度である。本発明は平均粒径が１μｍ
以下の顔料を使用しているので、印字したときの反射濃
度が高く、また吐出口での目詰まりを防ぐことができる
。一方、平均粒径が１μｍより大きい場合には、印字し
たとき反射濃度が低く、吐出口で目詰まりを起こし安定
して吐出することができない。[0010] In an inkjet printer, the recording liquid ejection opening is usually about several tens of micrometers. In the present invention, the average particle size is 1 μm.
Since the following pigments are used, the reflection density when printed is high, and clogging at the ejection port can be prevented. On the other hand, if the average particle size is larger than 1 μm, the reflection density will be low when printed, and the ejection port will become clogged, making stable ejection impossible.
【００１１】本発明の記録液に使用可能な有機顔料とし
ては、カ−ボンブラック、銅フタロシアニン、キナクリ
ドン、ベンジジンイエロ−Ｇ、ファアストイエロ−Ｇ，
ジスアゾイエロ−ＡＡＡ、フラバンスロインイエロ−、
ペリレンバ−ミリオン、ナフト−ルカミンＦＢＢ、キナ
クリドンマゼンタ、無金属フタロシアニンブル−、ファ
ストスカイブル−、アルカリブル−Ｇ，アニリンブラッ
ク等が挙げられる。無機顔料としては黄鉛１０Ｇ、カド
ミウムイエロ−、チタンイエロ−、ベンガラ、モリブテ
−トオレンジ、鉛丹、紺青、コバルトブル−、群青、鉄
黒等が挙げられる。Organic pigments that can be used in the recording liquid of the present invention include carbon black, copper phthalocyanine, quinacridone, benzidine yellow-G, faasto yellow-G,
Jis azo yellow - AAA, flavanthroin yellow,
Examples include perylene vermilion, naphtholucamine FBB, quinacridone magenta, metal-free phthalocyanine blue, fast sky blue, alkaline blue-G, and aniline black. Examples of inorganic pigments include yellow lead 10G, cadmium yellow, titanium yellow, red iron, molybutate orange, red lead, navy blue, cobalt blue, ultramarine, and iron black.
【００１２】本発明において分散剤として使用する水溶
性高分子としては、ポリビニルピロリドン、ポリビニル
アルコ−ル、ポリアクリル酸等が挙げられる。この水溶
性高分子については、顔料を分散させ安定に存在させる
ものであれば良く、特に分子量を指定するものではない
。ただし、紙中に含まれるセルロ−ス等の成分に吸着す
る性質をもつものでなければならない。[0012] Examples of the water-soluble polymer used as a dispersant in the present invention include polyvinylpyrrolidone, polyvinyl alcohol, and polyacrylic acid. The water-soluble polymer may be any polymer that can disperse the pigment and stably exist therein, and its molecular weight is not particularly specified. However, it must have the property of adsorbing components such as cellulose contained in paper.
【００１３】また、上記水溶性高分子としては融点が５
０℃以上のものが好ましい。このような水溶性高分子を
使用することにより、紙に印字した後も室温で顔料を吸
着し固体状態を安定して保持することが容易になる。[0013] Furthermore, the water-soluble polymer has a melting point of 5
Preferably, the temperature is 0°C or higher. By using such a water-soluble polymer, it becomes easy to adsorb the pigment and stably maintain the solid state at room temperature even after printing on paper.
【００１４】さらに本発明の記録液において、液媒体で
ある水の紙への吸収速度を制御するため、水溶性低分子
を分散剤として添加しても良い。水溶性低分子としては
Ｎ−メチルピロリドン、Ｎ，Ｎ−ジメチルフォルムアミ
ド、ジメチルスルフォキシド等が挙げられる。このよう
な系では顔料粒子を安定に保持できるので、顔料粒子の
凝集や沈澱による吐出口の目詰まりを起こすことがない
。また、適切な大きさで、大きさの揃った液滴を安定し
て吐出することができるので、印字品質に優れている。Furthermore, in the recording liquid of the present invention, a water-soluble low molecule may be added as a dispersant in order to control the absorption rate of water, which is a liquid medium, into paper. Examples of water-soluble low molecules include N-methylpyrrolidone, N,N-dimethylformamide, and dimethylsulfoxide. In such a system, pigment particles can be held stably, so that clogging of the discharge port due to aggregation or precipitation of pigment particles does not occur. Further, since droplets of appropriate size and uniform size can be stably ejected, the printing quality is excellent.
【００１５】[0015]
【実施例】以下、実施例を基に本発明の記録液について
さらに詳しく説明する。ただし、本発明は実施例に限定
されるものではない。下記実施例において部は重量部を
表す。EXAMPLES The recording liquid of the present invention will be explained in more detail below based on Examples. However, the present invention is not limited to the examples. In the following examples, parts represent parts by weight.
【００１６】実施例１
カ−ボンブラック５部（平均粒径０．３μｍ）、ポリビ
ニルピロリドン５部、Ｎ−メチルピロリドン５部、水１
００部の混合溶液を遊星ボ−ルミルで６０分間、粉砕、
分散して黒色の記録液を作製した（２５℃における粘度
８ｃｐ）。全体が圧電素材で作製された記録ヘッドにこ
の記録液を搭載し、数種類の普通紙に印字した。印字は
耐光性、耐水性に極めて優れ、色調が鮮明で反射濃度が
高かった。また、印字の周辺形状は滑らかで滲みやフェ
ザリングは認められなかった。また記録液は長期保存し
ても顔料粒子の凝集や沈降は認められなかった。Example 1 5 parts of carbon black (average particle size 0.3 μm), 5 parts of polyvinylpyrrolidone, 5 parts of N-methylpyrrolidone, 1 part of water
00 parts of the mixed solution was ground in a planetary ball mill for 60 minutes,
A black recording liquid was prepared by dispersing it (viscosity at 25° C.: 8 cp). This recording liquid was mounted on a recording head made entirely of piezoelectric material, and the researchers printed on several types of plain paper. The print had excellent light resistance and water resistance, clear color tone, and high reflection density. Furthermore, the peripheral shape of the printed characters was smooth and no bleeding or feathering was observed. Furthermore, no aggregation or sedimentation of pigment particles was observed in the recording liquid even after long-term storage.
【００１７】実施例２
銅フタロシアニン５部（平均粒径０．２μｍ）、ポリビ
ニルピロリドン５部、Ｎ−メチルピロリドン５部、水１
００部の混合溶液を遊星ボ−ルミルで６０分間、粉砕、
分散して青色の記録液を作製した（２５℃における粘度
は９．３ｃｐ）。この記録液を用いて実施例１と同様に
して印字を行ったところ実施例１と同様に優れた結果が
得られた。Example 2 5 parts of copper phthalocyanine (average particle size 0.2 μm), 5 parts of polyvinylpyrrolidone, 5 parts of N-methylpyrrolidone, 1 part of water
00 parts of the mixed solution was ground in a planetary ball mill for 60 minutes,
A blue recording liquid was prepared by dispersing it (viscosity at 25° C.: 9.3 cp). When printing was performed using this recording liquid in the same manner as in Example 1, excellent results were obtained as in Example 1.
【００１８】実施例３
キナクリドン５部（平均粒径０．４μｍ）、ポリビニル
ピロリドン５部、Ｎ−メチルピロリドン５部、水１００
部の混合溶液を遊星ボ−ルミルで６０分間、粉砕、分散
して赤色の記録液を作製した（２５℃における粘度は８
．７ｃｐ）。この記録液を用いて実施例１と同様にして
印字を行ったところ実施例１と同様に優れた結果が得ら
れた。Example 3 5 parts of quinacridone (average particle size 0.4 μm), 5 parts of polyvinylpyrrolidone, 5 parts of N-methylpyrrolidone, 100 parts of water
A red recording liquid was prepared by crushing and dispersing the mixed solution in a planetary ball mill for 60 minutes (viscosity at 25°C: 8
．． 7 cp). When printing was performed using this recording liquid in the same manner as in Example 1, excellent results were obtained as in Example 1.
【００１９】実施例４
ベンジジンイエロ−Ｇ５部（平均粒径０．４μｍ）、ポ
リビニルピロリドン５部、Ｎ−メチルピロリドン５部、
水１００部の混合溶液を遊星ボ−ルミルで６０分間粉砕
、分散して黄色の記録液を作製した（２５℃における粘
度は７．８ｃｐ）。この記録液を用いて実施例１と同様
に印字を行ったところ実施例１と同様に優れた結果が得
られた。Example 4 5 parts of Benzidine Yellow-G (average particle size 0.4 μm), 5 parts of polyvinylpyrrolidone, 5 parts of N-methylpyrrolidone,
A mixed solution of 100 parts of water was ground and dispersed in a planetary ball mill for 60 minutes to prepare a yellow recording liquid (viscosity at 25°C: 7.8 cp). When printing was carried out in the same manner as in Example 1 using this recording liquid, similar excellent results as in Example 1 were obtained.
【００２０】実施例５
カ−ボンブラック５部（平均粒径０．３μｍ）、ポリビ
ニルピロリドン５部、水１００部の混合溶液を遊星ボ−
ルミルで６０分間、粉砕、分散して黒色の記録液を作製
した（２５℃における粘度１０ｃｐ）。この記録液を用
いて実施例１と同様に印字を行ったところ実施例１と同
様に優れた結果が得られた。Example 5 A mixed solution of 5 parts of carbon black (average particle size 0.3 μm), 5 parts of polyvinylpyrrolidone, and 100 parts of water was poured into a planetary board.
A black recording liquid was prepared by pulverizing and dispersing for 60 minutes using Lumil (viscosity 10 cp at 25° C.). When printing was carried out in the same manner as in Example 1 using this recording liquid, similar excellent results as in Example 1 were obtained.
【００２１】比較例１
カ−ボンブラック５部（平均粒径０．３μｍ）、ポリビ
ニルピロリドン１部、Ｎ−メチルピロリドン５部、水１
００部の混合溶液を遊星ボ−ルミルで６０分間、粉砕、
分散して黒色の記録液を作製した（２５℃における粘度
３ｃｐ）。この記録液を用いて実施例１と同様に印字を
行ったところ、滲みやフェザリングが激しく非常に悪い
印字しか得られなかった。Comparative Example 1 5 parts of carbon black (average particle size 0.3 μm), 1 part of polyvinylpyrrolidone, 5 parts of N-methylpyrrolidone, 1 part of water
00 parts of the mixed solution was ground in a planetary ball mill for 60 minutes,
A black recording liquid was prepared by dispersing it (viscosity: 3 cp at 25° C.). When printing was performed using this recording liquid in the same manner as in Example 1, only very poor printing was obtained with severe bleeding and feathering.
【００２２】比較例２
カ−ボンブラック５部（平均粒径０．３μｍ）、ポリビ
ニルピロリドン１０部、Ｎ−メチルピロリドン５部、水
１００部の混合溶液を遊星ボ−ルミルで６０分間、粉砕
、分散して黒色の記録液を作製した（２５℃における粘
度５８ｃｐ）。この記録液を用いて実施例１と同様に印
字を行ったところ、粘度が高く吐出させることができな
かった。Comparative Example 2 A mixed solution of 5 parts of carbon black (average particle size 0.3 μm), 10 parts of polyvinylpyrrolidone, 5 parts of N-methylpyrrolidone, and 100 parts of water was ground in a planetary ball mill for 60 minutes. A black recording liquid was prepared by dispersing it (viscosity at 25°C: 58 cp). When printing was performed using this recording liquid in the same manner as in Example 1, the viscosity was so high that it could not be ejected.
【００２３】[0023]
【発明の効果】以上のように本発明の記録液は、吐出口
で目詰まりを防止でき、安定して吐出することができる
。印字は耐光性、耐水性に極めて優れたもので、色調が
鮮明で反射濃度の高いものが得られる。印字の周辺形状
は滑らかで滲みやフェザリングが起こらない。また、本
発明の記録液は長期間の保存も可能である。さらに水溶
性低分子を分散剤として添加したものは、適切な大きさ
の液滴で、大きさの揃った液滴を形成することができる
。As described above, the recording liquid of the present invention can prevent clogging at the ejection port and can be ejected stably. Prints have excellent light and water resistance, with clear color tones and high reflection density. The peripheral shape of the print is smooth and does not bleed or feather. Furthermore, the recording liquid of the present invention can be stored for a long period of time. Furthermore, when a water-soluble low molecule is added as a dispersant, droplets of an appropriate size and uniform size can be formed.
Claims (4)
て、少なくとも平均粒径が１μｍ以下である顔料、分散
剤としての水溶性高分子、および水を含有し、２５℃に
おける粘度が５ｃｐ以上３０ｃｐ以下であることを特徴
とする記録液。Claim 1: A recording liquid for inkjet recording, which contains at least a pigment with an average particle size of 1 μm or less, a water-soluble polymer as a dispersant, and water, and has a viscosity at 25° C. of 5 cp or more and 30 cp or less. A recording liquid characterized by:
ことを特徴とする請求項１記載の記録液。2. The recording liquid according to claim 1, wherein the pigment is an organic or inorganic pigment.
であることを特徴とする請求項１記載の記録液。3. The recording liquid according to claim 1, wherein the water-soluble polymer has a melting point of 50° C. or higher.
特徴とする請求項１記載の記録液。4. The recording liquid according to claim 1, wherein a water-soluble low molecule is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2412593A JPH04220473A (en) | 1990-12-21 | 1990-12-21 | Recording fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2412593A JPH04220473A (en) | 1990-12-21 | 1990-12-21 | Recording fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04220473A true JPH04220473A (en) | 1992-08-11 |
Family
ID=18521413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2412593A Pending JPH04220473A (en) | 1990-12-21 | 1990-12-21 | Recording fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04220473A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704503A1 (en) | 1994-09-27 | 1996-04-03 | Mitsubishi Chemical Corporation | Recording liquid containing carbon black |
| WO2003066752A1 (en) * | 2002-02-05 | 2003-08-14 | Ricoh Company Ltd. | Ink for ink-jet recording, ink set, ink cartridge, recorder, and recording method |
| EP1562410A3 (en) * | 2004-02-09 | 2008-04-09 | E.I. Dupont De Nemours And Company | Ink jet printable thick film ink compositions and processes |
-
1990
- 1990-12-21 JP JP2412593A patent/JPH04220473A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704503A1 (en) | 1994-09-27 | 1996-04-03 | Mitsubishi Chemical Corporation | Recording liquid containing carbon black |
| WO2003066752A1 (en) * | 2002-02-05 | 2003-08-14 | Ricoh Company Ltd. | Ink for ink-jet recording, ink set, ink cartridge, recorder, and recording method |
| US7094813B2 (en) | 2002-02-05 | 2006-08-22 | Ricoh Company, Ltd. | Ink-jet recording ink, ink-jet recording ink set, ink cartridge, ink-jet printer, and ink-jet printing method |
| SG139601A1 (en) * | 2002-02-05 | 2008-02-29 | Ricoh Kk | Ink-jet recording ink, ink-jet recording ink set, ink cartridge, ink-jet printer, and ink-jet printing method |
| CN100383202C (en) * | 2002-02-05 | 2008-04-23 | 株式会社理光 | Ink for ink-jet recording, ink set, ink cartridge, recorder, and recording method |
| EP1562410A3 (en) * | 2004-02-09 | 2008-04-09 | E.I. Dupont De Nemours And Company | Ink jet printable thick film ink compositions and processes |
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