JP3697932B2 - Inkjet recording method capable of forming images without blur - Google Patents
Inkjet recording method capable of forming images without blur Download PDFInfo
- Publication number
- JP3697932B2 JP3697932B2 JP9896699A JP9896699A JP3697932B2 JP 3697932 B2 JP3697932 B2 JP 3697932B2 JP 9896699 A JP9896699 A JP 9896699A JP 9896699 A JP9896699 A JP 9896699A JP 3697932 B2 JP3697932 B2 JP 3697932B2
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- JP
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- Prior art keywords
- ink composition
- recording method
- image
- ink
- inkjet recording
- 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.)
- Expired - Fee Related
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Description
【０００１】
【発明の背景】
発明の分野
本発明は、輪郭部におけるにじみの少ない画像を実現可能なインクジェット記録方法に関する。
【０００２】
背景技術
インクジェット記録方法は、インク組成物の小滴を飛翔させ、紙等の記録媒体に付着させて印刷を行う印刷方法である。この方法は、比較的安価な装置で高解像度、高品位な画像を高速で印刷可能であるという特徴を有する。
【０００３】
インクジェット記録に使用されるインク組成物は、水を主成分とし、これに着色成分および目詰まり防止等の目的でグリセリン等の湿潤剤を含有したものが一般的である。
【０００４】
インクジェット記録において重要なことは、良好な印字、具体的にはエッジが鋭くまたは鮮鋭度が高い、そしてヒゲなどの少ない印字が種々の記録媒体において実現できること、とりわけ「普通紙」において実現できることである。ここで「普通紙」とは、広範な多種多様な市販の記録紙、とりわけ静電コピーに用いられる紙を意味する。このような紙は、インクジェットプリンターの用途に最適化された構造、組成、または特性を付与されていない。しかし、最近、普通紙に優れた印字品質を実現できるインクジェットプリンターが益々要求されてきている。
【０００５】
また、超浸透性インク組成物と呼ばれる記録媒体への浸透性の高いインク組成物を用いてインクジェット記録を行うことが提案されてきている。浸透性の高いインク組成物を用いることで、乾燥時間を短くし、また少ないインク量で大きなドットを形成してインク消費量を低く抑えることができるとの利点が得られる。一方で浸透性の高いインク組成物は記録媒体にしみこみやすいことから、にじみが生じやすい。
【０００６】
【発明の概要】
本発明は、超浸透性インク組成物を用いながらにじみの少ない画像が実現できるインクジェット記録方法の提供をその目的としている。
【０００７】
本発明によるインクジェット記録方法は、超浸透性インク組成物と緩浸透性インク組成物とを用いたインクジェット記録方法であって、画像の輪郭部の少なくとも１または２画素を緩浸透性インク組成物により印刷し、他の画像部分を超浸透性インク組成物により印刷することを特徴とするものである。
【０００８】
本発明によるインクジェット記録方法によれば、超浸透性インク組成物の利点を享受しながら、にじみの少ない画像を実現することができる。
【０００９】
【発明の具体的説明】
インクジェット記録方法
本発明によるインクジェット記録方法を図面を用いて説明する。
図１は、本発明によるインクジェット記録方法によって単一色に印刷されたアルファベットＡである。図２は、図１中のＳで示された領域の拡大図であり、アルファベットＡがインクジェット記録方法によって印字された多数の画素（ドット）によって形成されてなることを示した図である。
【００１０】
本発明にあっては、単一色の画像の輪郭部の少なくとも１または２画素、すなわち図中の１のみ、または図中の１および２で示される画素群を緩浸透性インク組成物により印刷する。そして、他の部分、すなわち図中の３で示された画素群を超浸透性インク組成物により印刷する。超浸透性インク組成物によれば、乾燥時間が短く、また少ない少ないインク量で画像画形成できるとの利点を享受できる。一方で、記録媒体ににじみにくい緩浸透性インク組成物により画像領域の輪郭部を形成することで、全体として超浸透性インク組成物の利点を享受しながら、にじみの少ない画像が形成できる。
【００１１】
本発明の好ましい態様によれば、画像がブラック画像である場合に、特に画像がブラックキャラクターである場合に、好ましく本発明によるインクジェット記録方法を適用することができる。
【００１２】
超浸透性インク組成物および緩浸透性インク組成物
本発明において用いられるインク組成物は、少なくとも着色剤と水とを含んでなる。そして、記録媒体へのその浸透性は、浸透剤の添加によって制御されてよい。インク組成物の浸透性の程度は、表面張力を指標に制御されてよい。そして、本発明による方法に用いられる超浸透性インク組成物は、その表面張力の上限が３５ｍＮ／ｍ程度であり、より好ましくは３３ｍＮ／ｍであり、その下限は２５ｍＮ／ｍ程度であり、より好ましくは２８ｍＮ／ｍである。また、緩浸透性インク組成物は、その表面張力の上限が６５ｍＮ／ｍ程度であり、より好ましくは５０ｍＮ／ｍであり、その下限は４０ｍＮ／ｍ程度であり、より好ましくは４５ｍＮ／ｍである。
【００１３】
本発明において利用可能な浸透剤としては、カチオン性界面活性剤、アニオン性界面活性剤、非イオン性界面活性剤、両性界面活性剤等の各種界面活性剤、メタノール、エタノール、iso−プロピルアルコール等のアルコール類、エチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、トリエチレングリコールモノブチルエーテル、プロピレングリコールモノブチルエーテル、ジプロピレングリコールモノブチルエーテル等の多価アルコールの低級アルキルエーテルなどがあげられる。
【００１４】
本発明の好ましい態様によれば、浸透剤として下記式（Ｉ）で表わされる化合物を添加することが好ましい。
【化１】
【００１５】
上記式（Ｉ）で表される化合物の代表的なものとして具体的にはオルフィンＹ、サーフィノール８２、サーフィノール４４０、サーフィノール４６５、サーフィノール４８５（いずれも製造：Ａｉｒ Ｐｒｏｄｕｃｔｓ ａｎｄ Ｃｈｅｍｉｃａｌｓ．Ｉｎｃ．）等がある。これらは単独でまたは２種類以上添加しても良い。
【００１６】
本発明の好ましい態様によれば、インク組成物の粘度は１．５ｍＰａ・ｓ以上１０ｍＰａ・ｓ以下の範囲とされるのが好ましい。
【００１７】
本発明において用いられるインク組成物に含まれる着色剤としては、染料、顔料のいずれであってもよいが、インク組成物の不溶化あるいは増粘等の作用によって、インク中の着色成分の浸透を抑制する場合は、水性媒体中に溶解している染料よりも分散している顔料の方が有利である。
【００１８】
染料としては、直接染料、酸性染料、食用染料、塩基性染料、反応性染料、分散染料、建染染料、可溶性建染染料、反応分散染料、など通常インクジェット記録に使用する各種染料を使用することができる。
【００１９】
顔料としては、無機顔料、有機顔料を使用することができる。無機顔料としては、酸化チタンおよび酸化鉄に加え、コンタクト法、ファーネス法、サーマル法などの公知の方法によって製造されたカーボンブラックを使用することができる。また、有機顔料としては、アゾ顔料（アゾレーキ、不溶性アゾ顔料、縮合アゾ顔料、キレートアゾ顔料などを含む）、多環式顔料（例えば、フタロシアニン顔料、ペリレン顔料、ペリノン顔料、アントラキノン顔料、キナクリドン顔料、ジオキサジン顔料、チオインジゴ顔料、イソインドリノン顔料、キノフラロン顔料など）、染料キレート（例えば、塩基性染料型キレート、酸性染料型キレートなど）、ニトロ顔料、ニトロソ顔料、アニリンブラックなどを使用できる。
【００２０】
インクへの顔料の添加量は、１〜１５重量％程度が好ましく、より好ましくは３〜８重量％程度である。
【００２１】
また、本発明の好ましい態様によれば、顔料は、顔料を分散剤で溶媒中に分散させて得られた顔料分散液としてインク組成物に添加されるのが好ましい。好ましい分散剤としては、従来公知の顔料分散液を調製するのに用いられている公知の分散剤、例えば高分子分散剤、界面活性剤を利用することができる。
【００２２】
高分子分散剤の好ましい例としては天然高分子が挙げられ、その具体例としては、にかわ、ゼラチン、ガゼイン、アルブミンなどのタンパク質類；アラビアゴム、トラガントゴムなどの天然ゴム類；サボニンなどのグルコシド類；アルギン酸およびアルギン酸プロピレングリコールエステル、アルギン酸トリエタノールアミン、アルギン酸アンモニウムなどのアルギン酸誘導体；メチルセルロース、カルボキシメチルセルロース、ヒドロキシエチルセルロース、エチルヒドロキシエチルセルロースなどのセルロース誘導体などが挙げられる。
【００２３】
さらに高分子分散剤の好ましい例として合成高分子が挙げられ、ポリビニルアルコール類；ポリビニルピロリドン類；ポリアクリル酸、アクリル酸−アクリロニトリル共重合体、アクリル酸カリウム−アクリロニトリル共重合体、酢酸ビニル−アクリル酸エステル共重合体、アクリル酸−アクリル酸アルキルエステル共重合体などのアクリル系樹脂；スチレン−アクリル酸共重合体、スチレン−メタクリル酸共重合体、スチレン−メタクリル酸−アクリル酸アルキルエステル共重合体、スチレン−α−メチルスチレン−アクリル酸共重合体、スチレン−α−メチルスチレン−アクリル酸−アクリル酸アルキルエステル共重合体などのスチレン−アクリル酸樹脂；スチレン−マレイン酸；スチレン−無水マレイン酸；ビニルナフタレン−アクリル酸共重合体；ビニルナフタレン−マレイン酸共重合体；酢酸ビニル−エチレン共重合体、酢酸ビニル−脂肪酸ビニルエチレン共重合体、酢酸ビニルマレイン酸エステル共重合体、酢酸ビニルクロトン酸共重合体、酢酸ビニルアクリル酸共重合体などの酢酸ビニル系共重合体およびこれらの塩が挙げられる。これらのなかで、特に疎水性基を持つモノマーと親水性基を持つモノマーとの共重合体、および、疎水性基と親水性基とを合わせ持ったモノマーからなる重合体が好ましい。上記の塩としては、ジエチルアミン、アンモニア、エチルアミン、トリエチルアミン、プロピルアミン、イソプロピルアミン、ジプロピルアミン、ブチルアミン、イソブチルアミン、トリエタノールアミン、ジエタノールアミン、アミノメチルプロパノール、モルホリンなどとの塩が挙げられる。これらの共重合体は、重量平均分子量が３，０００〜３０，０００であるのが好ましく、より好ましくは５，０００〜１５，０００である。
【００２４】
また、分散剤として好ましい界面活性剤の例としては、脂肪酸塩類、高級アルキルジカルボン酸塩、高級アルコール硫酸エステル塩類、高級アルキルスルホン酸塩、高級脂肪酸とアミノ酸の縮合物、スルホ琥珀酸エステル塩、ナフテン酸塩、液体脂肪油硫酸エステル塩類、アルキルアリルスルホン酸塩類などの陰イオン界面活性剤；脂肪酸アミン塩、第四アンモニウム塩、スルホニウム塩、ホスホニウムなどの陽イオン界面活性剤；ポリオキシエチレンアルキルエーテル類、ポリオキシエチレンアルキルエステル類、ソルビタンアルキルエステル類、ポリオキシエチレンソルビタンアルキルエステル類などの非イオン性界面活性剤などが挙げられる。
【００２５】
本発明によるインク組成物は、水と、水溶性有機溶媒との混合物を基本溶媒として形成されるのが好ましい。
【００２６】
本発明において添加される水溶性有機溶媒は、好ましくは低沸点有機溶剤であり、その好ましい例としては、メタノール、エタノール、ｎ−プロピルアルコール、ｉｓｏ−プロピルアルコール、ｎ−ブタノール、ｓｅｃ−ブタノール、ｔｅｒｔ−ブタノール、ｉｓｏ−ブタノール、ｎ−ペンタノールなどがあげられる。特に一価アルコールが好ましい。低沸点有機溶剤は、インク組成物の乾燥時間を短くする効果がある。
【００２７】
また、本発明の好ましい態様によれば、本発明によるインク組成物は、ノズルにおける目詰まりを防止するため、さらに高沸点有機溶媒を含んでなることが好ましい。高沸点有機溶媒剤の好ましい例としては、エチレングリコール、ジエチレングリコール、トリエチレングリコール、ポリエチレングリコール、ポリプロピレングリコール、プロピレングリコール、ブチレングリコール、１，２，６−ヘキサントリオール、チオグリコール、ヘキシレングリコール、グリセリン、トリメチロールエタン、トリメチロールプロパンなどの多価アルコール類、エチレングリコールモノエチルエーテル、エチレングリコールモノブチルエーテル、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノブチルエーテル、トリエチエレングリコールモノメチルエーテル、トリエチレングリコールモノエチルエーテル、トリエチレングリコールモノブチルエーテルなどの多価アルコールのアルキルエーテル類、尿素、２−ピロリドン、Ｎ−メチル−２−ピロリドン、１，３−ジメチル−２−イミダゾリジノン、トリエタノールアミンなどがあげられる。
【００２８】
低沸点有機溶剤の添加量はインク組成物の０．５〜１０重量％が好ましく、より好ましくは１．５〜６重量％の範囲である。また、高沸点有機溶媒の添加量は、インク組成物の０．５〜４０重量％が好ましく、より好ましくは２〜２０重量％の範囲である。
【００２９】
本発明の好ましい態様によれば、本発明によるインク組成物は糖を含有してもよい。糖類の例としては、単糖類、二糖類、オリゴ糖類（三糖類および四糖類を含む）および多糖類があげられ、好ましくはグルコース、マンノース、フルクトース、リボース、キシロース、アラビノース、ガラクトース、アルドン酸、グルシシール、ソルビット、マルトース、セロビオース、ラクトース、スクロース、トレハロース、マルトトリオース、などがあげられる。ここで、多糖類とは広義の糖を意味し、アルギン酸、α−シクロデキストリン、セルロースなど自然界に広く存在する物質を含む意味に用いることとする。
【００３０】
また、これらの糖類の誘導体としては、前記した糖類の還元糖（例えば、糖アルコール（一般式ＨＯＣＨ2（ＣＨＯＨ）nＣＨ2ＯＨ（ここで、ｎ＝２〜５の整数を表す）で表される）、酸化糖（例えば、アルドン酸、ウロン酸など）、アミノ酸、チオ糖などがあげられる。特に糖アルコールが好ましく、具体例としてはマルチトール、ソルビットなどがあげられる。
【００３１】
これら糖類の含有量は、インク組成物の０．１〜４０重量％、好ましくは０．５〜３０重量％の範囲が適当である。
【００３２】
その他、必要に応じて、ｐＨ調整剤、防腐剤、防かび剤等を添加しても良い。
【図面の簡単な説明】
【図１】本発明によるインクジェット記録方法によって単一色に印刷されたアルファベットＡである。
【図２】図１中のＳで示された領域の拡大図であり、アルファベットＡがインクジェット記録方法によって印字された多数の画素（ドット）によって形成されてなることを示した図である。図中で、１のみまたは１および２で示される画素群を緩浸透性インク組成物により印刷し、３で示された画素群を超浸透性インク組成物により印刷する。[0001]
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION The present invention relates to an ink jet recording method capable of realizing an image with less blurring at a contour portion.
[0002]
Background art The inkjet recording method is a printing method in which printing is performed by causing droplets of an ink composition to fly and adhere to a recording medium such as paper. This method has a feature that a high-resolution and high-quality image can be printed at a high speed with a relatively inexpensive apparatus.
[0003]
Ink compositions used for inkjet recording generally contain water as a main component and a coloring component and a wetting agent such as glycerin for the purpose of preventing clogging.
[0004]
What is important in inkjet recording is that good printing, in particular, sharp edges or high sharpness, and printing with few whiskers can be realized on various recording media, especially "plain paper". . Here, “plain paper” means a wide variety of commercially available recording papers, especially papers used for electrostatic copying. Such paper is not imparted with a structure, composition, or properties optimized for inkjet printer applications. Recently, however, there has been an increasing demand for ink jet printers capable of realizing excellent print quality on plain paper.
[0005]
In addition, it has been proposed to perform ink jet recording using an ink composition having a high permeability to a recording medium called a superpermeable ink composition. By using a highly penetrating ink composition, there are advantages in that the drying time can be shortened, and that large dots can be formed with a small amount of ink to reduce the ink consumption. On the other hand, a highly penetrating ink composition is likely to soak into the recording medium, and therefore tends to bleed.
[0006]
SUMMARY OF THE INVENTION
An object of the present invention is to provide an ink jet recording method capable of realizing an image with less blur while using a superpermeable ink composition.
[0007]
An ink jet recording method according to the present invention is an ink jet recording method using a superpermeable ink composition and a slow penetrating ink composition, wherein at least one or two pixels of the contour portion of an image are formed by the slow penetrating ink composition. Printing is performed, and other image portions are printed with the superpermeable ink composition.
[0008]
According to the ink jet recording method of the present invention, it is possible to realize an image with less blur while enjoying the advantages of the superpermeable ink composition.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Inkjet recording method The inkjet recording method according to the present invention will be described with reference to the drawings.
FIG. 1 is an alphabet A printed in a single color by the ink jet recording method according to the present invention. FIG. 2 is an enlarged view of the area indicated by S in FIG. 1 and shows that the alphabet A is formed by a large number of pixels (dots) printed by the ink jet recording method.
[0010]
In the present invention, at least one or two pixels of the outline of a single color image, that is, only one in the figure, or a group of pixels indicated by 1 and 2 in the figure is printed with the slow permeable ink composition. . Then, the other portion, that is, the pixel group indicated by 3 in the figure is printed with the superpermeable ink composition. According to the superpermeable ink composition, it is possible to enjoy the advantages that the drying time is short and the image can be formed with a small amount of ink. On the other hand, by forming the contour portion of the image region with a slowly penetrating ink composition that hardly bleeds into the recording medium, an image with less bleed can be formed while enjoying the advantages of the super permeable ink composition as a whole.
[0011]
According to a preferred aspect of the present invention, when the image is a black image, particularly when the image is a black character, the ink jet recording method according to the present invention can be preferably applied.
[0012]
Super-permeable ink composition and slow-permeable ink composition The ink composition used in the present invention comprises at least a colorant and water. Then, its permeability to the recording medium may be controlled by adding a penetrant. The degree of permeability of the ink composition may be controlled using surface tension as an index. The superpermeable ink composition used in the method according to the present invention has an upper limit of surface tension of about 35 mN / m, more preferably 33 mN / m, and a lower limit of about 25 mN / m. Preferably it is 28 mN / m. Further, the slow permeable ink composition has an upper limit of the surface tension of about 65 mN / m, more preferably 50 mN / m, and a lower limit of about 40 mN / m, more preferably 45 mN / m. .
[0013]
Examples of penetrants usable in the present invention include various surfactants such as cationic surfactants, anionic surfactants, nonionic surfactants, and amphoteric surfactants, methanol, ethanol, iso-propyl alcohol, and the like. And lower alkyl ethers of polyhydric alcohols such as ethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, propylene glycol monobutyl ether and dipropylene glycol monobutyl ether.
[0014]
According to a preferred embodiment of the present invention, it is preferable to add a compound represented by the following formula (I) as a penetrant.
[Chemical 1]
[0015]
Specific examples of the compound represented by the above formula (I) include Orphine Y, Surfinol 82, Surfinol 440, Surfinol 465, Surfinol 485 (all manufactured by Air Products and Chemicals. Inc. ) Etc. These may be used alone or in combination of two or more.
[0016]
According to a preferred aspect of the present invention, the viscosity of the ink composition is preferably in the range of 1.5 mPa · s to 10 mPa · s.
[0017]
The colorant contained in the ink composition used in the present invention may be either a dye or a pigment, but it suppresses the penetration of the coloring component in the ink by the action of insolubilization or thickening of the ink composition. If so, a pigment dispersed is more advantageous than a dye dissolved in an aqueous medium.
[0018]
As dyes, use various dyes that are usually used for inkjet recording, such as direct dyes, acid dyes, food dyes, basic dyes, reactive dyes, disperse dyes, vat dyes, soluble vat dyes, and reactive disperse dyes. Can do.
[0019]
As the pigment, inorganic pigments and organic pigments can be used. As the inorganic pigment, in addition to titanium oxide and iron oxide, carbon black produced by a known method such as a contact method, a furnace method, or a thermal method can be used. Organic pigments include azo pigments (including azo lakes, insoluble azo pigments, condensed azo pigments, chelate azo pigments), polycyclic pigments (for example, phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazines). Pigments, thioindigo pigments, isoindolinone pigments, quinofullerone pigments, etc.), dye chelates (for example, basic dye chelate, acid dye chelate, etc.), nitro pigments, nitroso pigments, aniline black, and the like.
[0020]
The amount of the pigment added to the ink is preferably about 1 to 15% by weight, more preferably about 3 to 8% by weight.
[0021]
According to a preferred embodiment of the present invention, the pigment is preferably added to the ink composition as a pigment dispersion obtained by dispersing the pigment in a solvent with a dispersant. As a preferable dispersant, a known dispersant used to prepare a conventionally known pigment dispersion, for example, a polymer dispersant or a surfactant can be used.
[0022]
Preferred examples of the polymer dispersant include natural polymers, and specific examples thereof include proteins such as glue, gelatin, casein, and albumin; natural rubbers such as gum arabic and tragacanth; glucosides such as saponin; Examples include alginic acid and alginic acid propylene glycol ester, alginic acid triethanolamine, alginic acid derivatives such as ammonium alginate; and cellulose derivatives such as methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and ethylhydroxyethylcellulose.
[0023]
Further, preferred examples of the polymer dispersant include synthetic polymers such as polyvinyl alcohols; polyvinylpyrrolidones; polyacrylic acid, acrylic acid-acrylonitrile copolymer, potassium acrylate-acrylonitrile copolymer, vinyl acetate-acrylic acid. Acrylic resins such as ester copolymers and acrylic acid-alkyl acrylate copolymers; styrene-acrylic acid copolymers, styrene-methacrylic acid copolymers, styrene-methacrylic acid-acrylic acid alkyl ester copolymers, Styrene-acrylic acid resins such as styrene-α-methylstyrene-acrylic acid copolymer and styrene-α-methylstyrene-acrylic acid-alkyl acrylate copolymer; styrene-maleic acid; styrene-maleic anhydride; vinyl Naphthalene-acrylic Acid copolymer; vinyl naphthalene-maleic acid copolymer; vinyl acetate-ethylene copolymer, vinyl acetate-fatty acid vinyl ethylene copolymer, vinyl acetate maleate ester copolymer, vinyl acetate crotonic acid copolymer, acetic acid Examples thereof include vinyl acetate copolymers such as vinyl acrylic acid copolymers and salts thereof. Among these, a copolymer of a monomer having a hydrophobic group and a monomer having a hydrophilic group, and a polymer composed of a monomer having both a hydrophobic group and a hydrophilic group are preferable. Examples of the salt include salts with diethylamine, ammonia, ethylamine, triethylamine, propylamine, isopropylamine, dipropylamine, butylamine, isobutylamine, triethanolamine, diethanolamine, aminomethylpropanol, morpholine, and the like. These copolymers preferably have a weight average molecular weight of 3,000 to 30,000, more preferably 5,000 to 15,000.
[0024]
Examples of surfactants preferable as a dispersant include fatty acid salts, higher alkyl dicarboxylates, higher alcohol sulfate esters, higher alkyl sulfonates, condensates of higher fatty acids and amino acids, sulfosuccinate esters, naphthenes. Anionic surfactants such as acid salts, liquid fatty oil sulfate esters, alkylallyl sulfonates; cationic surfactants such as fatty acid amine salts, quaternary ammonium salts, sulfonium salts, phosphoniums; polyoxyethylene alkyl ethers And nonionic surfactants such as polyoxyethylene alkyl esters, sorbitan alkyl esters, and polyoxyethylene sorbitan alkyl esters.
[0025]
The ink composition according to the present invention is preferably formed using a mixture of water and a water-soluble organic solvent as a basic solvent.
[0026]
The water-soluble organic solvent added in the present invention is preferably a low boiling point organic solvent, and preferred examples thereof include methanol, ethanol, n-propyl alcohol, iso-propyl alcohol, n-butanol, sec-butanol, tert. -Butanol, iso-butanol, n-pentanol and the like. A monohydric alcohol is particularly preferable. The low boiling point organic solvent has an effect of shortening the drying time of the ink composition.
[0027]
According to a preferred aspect of the present invention, the ink composition according to the present invention preferably further comprises a high-boiling organic solvent in order to prevent clogging in the nozzle. Preferred examples of the high boiling point organic solvent agent include ethylene glycol, diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, propylene glycol, butylene glycol, 1,2,6-hexanetriol, thioglycol, hexylene glycol, glycerin, Polyhydric alcohols such as trimethylolethane, trimethylolpropane, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl Ether, triethylene glycol monobutyl ether Alkyl ethers of polyhydric alcohols such as urea, 2-pyrrolidone, N- methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, triethanolamine and the like.
[0028]
The amount of the low-boiling organic solvent added is preferably 0.5 to 10% by weight of the ink composition, more preferably 1.5 to 6% by weight. The amount of the high-boiling organic solvent added is preferably 0.5 to 40% by weight of the ink composition, more preferably 2 to 20% by weight.
[0029]
According to a preferred embodiment of the present invention, the ink composition according to the present invention may contain sugar. Examples of saccharides include monosaccharides, disaccharides, oligosaccharides (including trisaccharides and tetrasaccharides) and polysaccharides, preferably glucose, mannose, fructose, ribose, xylose, arabinose, galactose, aldonic acid, glucosiyl. Sorbitol, maltose, cellobiose, lactose, sucrose, trehalose, maltotriose, and the like. Here, the polysaccharide means a saccharide in a broad sense, and is used to include a substance that exists widely in nature, such as alginic acid, α-cyclodextrin, and cellulose.
[0030]
The derivatives of these saccharides are represented by the reducing sugars of the saccharides described above (for example, sugar alcohol (general formula HOCH 2 (CHOH) nCH 2 OH (where n represents an integer of 2 to 5)). ), Oxidized sugars (for example, aldonic acid, uronic acid, etc.), amino acids, thio sugars, etc. Particularly preferred are sugar alcohols, and specific examples include maltitol, sorbit and the like.
[0031]
The content of these saccharides is suitably 0.1 to 40% by weight, preferably 0.5 to 30% by weight of the ink composition.
[0032]
In addition, you may add a pH adjuster, antiseptic | preservative, a fungicide, etc. as needed.
[Brief description of the drawings]
FIG. 1 is an alphabet A printed in a single color by an ink jet recording method according to the present invention.
FIG. 2 is an enlarged view of a region indicated by S in FIG. 1, and shows that an alphabet A is formed by a large number of pixels (dots) printed by an ink jet recording method. In the figure, only 1 or a group of pixels indicated by 1 and 2 is printed with a slowly permeable ink composition, and a pixel group indicated by 3 is printed with a superpermeable ink composition.
Claims (5)
画像の輪郭部の少なくとも１または２画素を緩浸透性インク組成物により印刷し、
他の画像部分を超浸透性インク組成物により印刷することを特徴とする、インクジェット記録方法。An ink jet recording method using a superpermeable ink composition and a slowly permeable ink composition,
Printing at least one or two pixels of the contour of the image with a slowly permeable ink composition;
An ink jet recording method comprising printing another image portion with a superpermeable ink composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9896699A JP3697932B2 (en) | 1999-04-06 | 1999-04-06 | Inkjet recording method capable of forming images without blur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9896699A JP3697932B2 (en) | 1999-04-06 | 1999-04-06 | Inkjet recording method capable of forming images without blur |
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| Publication Number | Publication Date |
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| JP2000289193A JP2000289193A (en) | 2000-10-17 |
| JP3697932B2 true JP3697932B2 (en) | 2005-09-21 |
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| JP9896699A Expired - Fee Related JP3697932B2 (en) | 1999-04-06 | 1999-04-06 | Inkjet recording method capable of forming images without blur |
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| US7311395B2 (en) * | 2001-09-07 | 2007-12-25 | Hewlett-Packard Development Company, L.P. | Optimized ink jet printing of barcodes |
| WO2013088549A1 (en) | 2011-12-15 | 2013-06-20 | キヤノン株式会社 | Inkjet printing method |
| JP2015033799A (en) | 2013-08-09 | 2015-02-19 | セイコーエプソン株式会社 | Liquid jet head and liquid jet device |
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| JP3015234B2 (en) * | 1993-10-28 | 2000-03-06 | キヤノン株式会社 | Color inkjet recording method |
| JP3981842B2 (en) * | 1995-01-13 | 2007-09-26 | 富士フイルム株式会社 | Inkjet recording method and apparatus |
| JPH09156130A (en) * | 1995-12-08 | 1997-06-17 | Canon Inc | Ink jet recording apparatus and ink jet recording method |
| JPH09262993A (en) * | 1996-01-25 | 1997-10-07 | Fujitsu Ltd | Ink jet recording method and apparatus |
| JPH09248921A (en) * | 1996-03-15 | 1997-09-22 | Ricoh Co Ltd | Ink jet recording apparatus and ink jet recording method |
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