JP5687730B2 - Erase ink - Google Patents
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- JP5687730B2 JP5687730B2 JP2013114529A JP2013114529A JP5687730B2 JP 5687730 B2 JP5687730 B2 JP 5687730B2 JP 2013114529 A JP2013114529 A JP 2013114529A JP 2013114529 A JP2013114529 A JP 2013114529A JP 5687730 B2 JP5687730 B2 JP 5687730B2
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- Prior art keywords
- ink
- polyethylene glycol
- dye
- cibacron
- water
- Prior art date
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- 239000000976 ink Substances 0.000 claims description 42
- 229920001223 polyethylene glycol Polymers 0.000 claims description 30
- 239000002202 Polyethylene glycol Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000000985 reactive dye Substances 0.000 claims description 17
- 239000000975 dye Substances 0.000 claims description 13
- 239000000980 acid dye Substances 0.000 claims description 3
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 21
- 238000003756 stirring Methods 0.000 description 8
- 238000005406 washing Methods 0.000 description 8
- ORLGPUVJERIKLW-UHFFFAOYSA-N 5-chlorotriazine Chemical compound ClC1=CN=NN=C1 ORLGPUVJERIKLW-UHFFFAOYSA-N 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 239000004705 High-molecular-weight polyethylene Substances 0.000 description 4
- AFOSIXZFDONLBT-UHFFFAOYSA-N divinyl sulfone Chemical compound C=CS(=O)(=O)C=C AFOSIXZFDONLBT-UHFFFAOYSA-N 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 230000001588 bifunctional effect Effects 0.000 description 3
- YKCWQPZFAFZLBI-UHFFFAOYSA-N cibacron blue Chemical compound C1=2C(=O)C3=CC=CC=C3C(=O)C=2C(N)=C(S(O)(=O)=O)C=C1NC(C=C1S(O)(=O)=O)=CC=C1NC(N=1)=NC(Cl)=NC=1NC1=CC=CC=C1S(O)(=O)=O YKCWQPZFAFZLBI-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- XULFCTLQSSIMOF-UHFFFAOYSA-N 1-ethenylsulfonylethene;triazine Chemical compound C1=CN=NN=C1.C=CS(=O)(=O)C=C XULFCTLQSSIMOF-UHFFFAOYSA-N 0.000 description 1
- UNCQVRBWJWWJBF-UHFFFAOYSA-N 2-chloropyrimidine Chemical compound ClC1=NC=CC=N1 UNCQVRBWJWWJBF-UHFFFAOYSA-N 0.000 description 1
- IHDBZCJYSHDCKF-UHFFFAOYSA-N 4,6-dichlorotriazine Chemical compound ClC1=CC(Cl)=NN=N1 IHDBZCJYSHDCKF-UHFFFAOYSA-N 0.000 description 1
- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 description 1
- HSDPVGZMHQGFAG-UHFFFAOYSA-N 5-chlorotriazine 1-ethenylsulfonylethene Chemical compound ClC=1C=NN=NC1.C(=C)S(=O)(=O)C=C HSDPVGZMHQGFAG-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 241000870659 Crassula perfoliata var. minor Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000271 synthetic detergent Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
Description
本発明は、衣服の布や不織布などの繊維集合体に誤って付着した場合に家庭での洗濯によって簡単に消去することができ、また半紙に書画を描く際の運筆性にも優れた消去性墨汁に関する。 The present invention can be easily erased by washing at home when it accidentally adheres to a fiber assembly such as a cloth or nonwoven fabric of clothes, and also has excellent erasability when drawing on a half-paper. It relates to ink.
従来、墨汁は、誤って衣服などの布や不織布などの繊維集合体に付着して定着した場合には、洗っても簡単には消えないという問題があった。そこで、水洗で簡単に消去できる墨汁が提案されている。
これらの墨汁は良好な消去性を有するものではあるが、さらに消去性に優れ、かつ半紙に書画を描く際の運筆性が良好な水消去性の墨汁が望まれている。
Although these ink inks have good erasability, there is a demand for water erasable ink inks that are further excellent in erasability and that have good brushing properties when drawing on a half-paper.
本発明の課題は、高分子量のポリエチレングリコールを用いても、衣類の布や不織布な
どの繊維集合体に誤って付着した場合に、家庭での洗濯によって簡単に消去することが可
能であり、かつ書画を描く際の書き味、運筆性を担保した墨汁を提供することである。
The problem of the present invention is that even if high molecular weight polyethylene glycol is used, it can be easily erased by washing at home when it accidentally adheres to a fiber assembly such as a cloth or nonwoven fabric of clothing, and The purpose is to provide ink that guarantees the taste and styling of writing.
特許文献１の実施例における水消去性墨汁では、重量平均分子量６００〜７５００のポリエチレングリコールを墨汁全量に対して約３０％添加している。当該含有量は、当該分子量の範囲のポリエチレングリコールを用いた場合において、水消去性を与えるために必要とされる含有量である。一方、ポリエチレングリコールを消去性付与剤として用いる場合には、洗濯時における家庭用洗剤（界面活性剤）の繊維への浸透促進効果付与の観点から、さらに高分子量のポリエチレングリコールを用いることが望ましい。また、その効果ゆえに墨汁全体に対するポリエチレングリコール含有量を低減することができるので経済的でもある。しかし、高分子量のポリエチレングリコールを用いると、系全体の粘度が上昇し、墨汁として使用することが出来ないことが懸念される。そこで本発明者は、高分子量のポリエチレングリコールの使用により高い消去性を付与された墨汁が、筆記性や運筆性を担保できる粘度範囲を決定した。そして求められる消去性と粘度範囲の両者を達成する手段として、墨汁に含まれる水と高分子量のポリエチレングリコールの比を確定することで、目的とする水消去性墨汁を完成した。 In the water-erasable black ink in Examples of Patent Document 1, about 30% of polyethylene glycol having a weight average molecular weight of 600 to 7500 is added to the total amount of black ink. The content is a content required to give water erasability when polyethylene glycol having the molecular weight is used. On the other hand, when polyethylene glycol is used as an erasability imparting agent, it is desirable to use a higher molecular weight polyethylene glycol from the viewpoint of imparting an effect of promoting the penetration of household detergent (surfactant) into the fibers during washing. Moreover, because of the effect, the polyethylene glycol content in the whole ink can be reduced, which is economical. However, when high molecular weight polyethylene glycol is used, there is a concern that the viscosity of the entire system increases and cannot be used as ink. Therefore, the present inventor has determined a viscosity range in which ink ink imparted with high erasability by use of high molecular weight polyethylene glycol can guarantee writing property and handing property. As a means for achieving both the required erasability and viscosity range, the ratio of water and high molecular weight polyethylene glycol contained in the ink was determined to complete the intended water erasable ink.
即ち、本発明の消去性墨汁は、染料、ポリエチレングリコール及び水を含有し、前記染料が反応性染料又は酸性染料であり、前記ポリエチレングリコールの重量平均分子量が８０００〜２００００であり（但し、ポリエチレングリコールの重量平均分子量が８０００を除く。）、前記ポリエチレングリコール（Ａ）の前記水（Ｂ）に対する割合（Ａ／Ｂ）が０．０５〜０．８であることを特徴とする消去性墨汁である。加えて前記ポリエチレングリコールの墨汁に対する割合が５〜４０重量％であることがよい。また粘度が５０〜４００mPa・sであることがよい。さらに、前記反応性染料が、モノクロルトリアジン型の反応性染料であることが好ましい。 That is, the erasable ink of the present invention contains a dye, polyethylene glycol and water, the dye is a reactive dye or an acid dye, and the polyethylene glycol has a weight average molecular weight of 8000 to 20000 (provided that polyethylene glycol And the ratio (A / B) of the polyethylene glycol (A) to the water (B) is 0.05 to 0.8. . In addition, the ratio of the polyethylene glycol to the ink is preferably 5 to 40% by weight. The viscosity is preferably 50 to 400 mPa · s. Further, the reactive dye is preferably a monochlorotriazine type reactive dye.
本発明により、衣服などに誤って付着した場合でも、家庭での洗濯により消去することができる墨汁を得ることができる。 According to the present invention, it is possible to obtain ink that can be erased by washing at home even when it is accidentally attached to clothes or the like.
＜ポリエチレングリコール＞
本発明で用いられるポリエチレングリコールの重量平均分子量は８０００〜２００００（但し、重量平均分子量８０００を除く。）であり、さらに好ましくは、８０００〜１００００である（但し、重量平均分子量８０００を除く。）。重量平均分子量が８０００未満の場合は、求める消去性が得られない。一方、重量平均分子量が２００００を超えるポリエチレングリコールは入手が困難であるだけでなく、系の粘度が高くなりすぎ、墨汁として不適となる。
<Polyethylene glycol>
The polyethylene glycol used in the present invention has a weight average molecular weight of 8000 to 20000 (excluding the weight average molecular weight of 8000), and more preferably 8000 to 10,000 (excluding the weight average molecular weight of 8,000). When the weight average molecular weight is less than 8000, the required erasability cannot be obtained. On the other hand, polyethylene glycol having a weight average molecular weight exceeding 20000 is not only difficult to obtain, but also the viscosity of the system becomes too high, making it unsuitable as ink.
＜粘度等＞
本発明の墨汁の粘度は、市販の一般の墨汁の粘度３〜４００mPa・sを前提に筆記性及び運筆性を検討したところ、３〜２００mPa・sが好ましく、さらに好ましくは、５〜５０mPa・sである。
当該粘度範囲とするためには、ポリエチレングリコールの墨汁に対する割合が、５〜４０重量％であることが好ましい。さらに、ポリエチレングリコール（Ａ）の水（Ｂ）に対する割合（Ａ／Ｂ）が０．０５〜０．８であることが好ましい。０．０５未満とすると、求める消去性が得られない。一方０．８以上を超えると、粘度が高すぎて求める筆記性や運筆性が得られず、墨汁として用いることができない。
<Viscosity>
The viscosity of the ink of the present invention was examined on the writability and handwriting property on the premise that the viscosity of a commercially available general ink is 3 to 400 mPa · s, and is preferably 3 to 200 mPa · s, more preferably 5 to 50 mPa · s. It is.
In order to make it into the said viscosity range, it is preferable that the ratio with respect to the ink of polyethylene glycol is 5 to 40 weight%. Furthermore, it is preferable that the ratio (A / B) of polyethylene glycol (A) to water (B) is 0.05 to 0.8. If it is less than 0.05, the required erasability cannot be obtained. On the other hand, when it exceeds 0.8 or more, the viscosity is too high to obtain the required writing property and luckiness and cannot be used as ink.
＜染料＞
本発明で用いられる反応性染料又は酸性染料は、ポリエチレングリコールを含有する消去性墨汁の系において、繊維中への染料の拡散及び染料と繊維の相互作用が低い染料である。限定されるものではないが、例えば、ジクロルトリアジン型、モノクロルトリアジン型、ビニールスルホン型、クロルピリミジン型、ジクロルキノキサジン型、モノクロルトリアジンとビニールスルホンの二官能基型を用いることができる。またその中でもモノクロルトリアジン型、ビニールスルホン型が好ましく、特にモノクロルトリアジン型の反応性染料が好ましい。
<Dye>
The reactive dye or acid dye used in the present invention is a dye having a low dye diffusion into the fiber and a low interaction between the dye and the fiber in the erasable ink-jet system containing polyethylene glycol. Although not limited, for example, a dichlorotriazine type, a monochlorotriazine type, a vinylsulfone type, a chloropyrimidine type, a dichloroquinoxazine type, or a bifunctional group type of monochlorotriazine and vinylsulfone can be used. Of these, monochlorotriazine type and vinyl sulfone type are preferable, and monochlorotriazine type reactive dye is particularly preferable.
具体的には、墨汁であることから黒色を呈する染料、例えば、商品名Cibacron Black P-SG（チバガイギー社製）、Cibacron Black P-2PD（チバガイギー社製）、Cibacron Black F-2B（チバガイギー社製）等のモノクロルトリアジン型反応性染料、商品名 Cibacron Black C-N（チバガイギー社製）等のモノクロルトリアジン−ビニルスルホン二官能基型反応性染料、商品名Remazol Black DEN Hi-Gran（ダイスター社製））等のビニルスルホン型反応性染料、C.I.番号A.Bk.2（商品名Water Black R-455）、C.I.番号A.Bk.119（商品名 Opal Black new conc 保土谷社製）等の酸性染料を挙げることができる。 Specifically, it is a black ink because it is ink, such as Cibacron Black P-SG (Ciba Geigy), Cibacron Black P-2PD (Ciba Geigy), Cibacron Black F-2B (Ciba Geigy) Monochlorotriazine type reactive dyes such as Cibacron Black CN (manufactured by Ciba Geigy), etc. Monochlorotriazine-vinylsulfone bifunctional reactive dyes such as Cibacron Black CN (trade name Remazol Black DEN Hi-Gran (manufactured by Dystar)), etc. Vinyl sulfone reactive dyes, CI number A.Bk.2 (trade name Water Black R-455), CI number A.Bk.119 (trade name Opal Black new conc, manufactured by Hodogaya Co., Ltd.) be able to.
また、他の色を呈する染料も単独で、又は混合して用いることができ、例えば、商品名Cibacron GrayG-R-01（チバガイギー社製）、Cibacron Blue P-B （チバガイギー社製）、Cibacron Navy GR-E-01（チバガイギー社製）、Cibacron Blue F-R（チバガイギー社製）、Cibacron Red P-B（チバガイギー社製）、Cibacron Red 4G-E-N（チバガイギー社製）、Cibacron Red F-B（チバガイギー社製）、Cibacron Yellow P-6GS（チバガイギー社製）、Cibacron Yellow 2G-E（チバガイギー社製）、Cibacron Yellow F-3R（チバガイギー社製）等のモノクロルトリアジン型反応性染料、商品名 Cibacron Blue C-R（チバガイギー社製）、Cibacron Red C-R（チバガイギー社製）、Cibacron Yellow C-R-1（チバガイギー社製）等のモノクロルトリアジン−ビニルスルホン二官能基型反応性染料、商品名Remazol Blue RU-N（ダイスター社製）、Remazol Red RU-N（ダイスター社製）、Remazol Yellow RU-N（ダイスター社製）等のビニルスルホン型反応性染料、商品名 Levafix Navy Blue E-BNA GRAN（ダイスター社製）、Levafix BR.Red E-RN（ダイスター社製）、Levafix G Yellow E-G（ダイスター社製）等のジクロルキノキサジン型反応性染料を挙げることができる。その他、C.I.番号 A.R.87（商品名 エオシン）、C.I.番号 A.B.9（商品名Water Blue #9）等の酸性染料を挙げることもでき、特に限定されるものではない。 In addition, dyes exhibiting other colors can be used alone or in combination, for example, trade names Cibacron Gray G-R-01 (Ciba Geigy), Cibacron Blue PB (Ciba Geigy), Cibacron Navy GR- E-01 (Ciba Geigy), Cibacron Blue FR (Ciba Geigy), Cibacron Red PB (Ciba Geigy), Cibacron Red 4G-EN (Ciba Geigy), Cibacron Red FB (Ciba Geigy), Cibacron Yellow P -6GS (Ciba Geigy), Cibacron Yellow 2G-E (Ciba Geigy), Cibacron Yellow F-3R (Ciba Geigy) and other monochlorotriazine type reactive dyes, trade name Cibacron Blue CR (Ciba Geigy), Cibacron Monochrome triazine-vinylsulfone bifunctional reactive dyes such as Red CR (Ciba Geigy), Cibacron Yellow CR-1 (Ciba Geigy), Remazol Blue RU-N (Dystar), Rem Vinyl sulfone-type reactive dyes such as azol Red RU-N (Dystar), Remazol Yellow RU-N (Dystar), trade name Levafix Navy Blue E-BNA GRAN (Dystar), Levafix BR.Red E And dichloroquinoxazine type reactive dyes such as -RN (Dystar) and Levafix G Yellow EG (Dystar). In addition, acidic dyes such as C.I. number A.R.87 (trade name eosin) and C.I.
染料の添加量は特に限定されないが、２〜４０重量％程度が好ましい。４０重量％を超えた場合は系が高粘度となるだけでなく、水溶性樹脂に包括しきれなくなり消去性に悪影響を及ぼす。一方、２重量％未満の場合は、着色力が低く好ましくない。 Although the addition amount of dye is not specifically limited, About 2 to 40 weight% is preferable. If it exceeds 40% by weight, not only will the system become highly viscous, but the water-soluble resin will not be able to be included and will adversely affect erasability. On the other hand, when it is less than 2% by weight, the coloring power is low, which is not preferable.
＜その他添加剤＞
本発明の消去性墨汁には、定着剤、増量剤、防腐剤、防黴剤、香料、界面活性剤、ｐＨ調整剤、粘度調整剤、分散剤、保水剤、湿潤剤、消泡剤、レベリング剤、粘弾性調整剤、にじみ防止剤、水、アルコールなど一般に墨汁に含まれるものを含めることができる。
<Other additives>
The erasable ink of the present invention includes a fixing agent, a bulking agent, an antiseptic, an antifungal agent, a fragrance, a surfactant, a pH adjusting agent, a viscosity adjusting agent, a dispersing agent, a water retention agent, a wetting agent, an antifoaming agent, and a leveling. Agents, viscoelasticity adjusting agents, anti-bleeding agents, water, alcohol and the like that are generally contained in ink can be included.
＜製造方法＞
本発明の消去性墨汁は、例えば必須成分である染料及びポリエチレングリコールを水に添加し、混合、撹拌により溶解させることによって得られる。
<Manufacturing method>
The erasable ink of the present invention can be obtained, for example, by adding a dye and polyethylene glycol, which are essential components, to water, and dissolving them by mixing and stirring.
（実施例１）
イオン交換水５０ｍｌにポリエチレングリコール（重量平均分子量８０００）２０ｇを溶解し、室温で撹拌しながら、商品名 Cibacron Black P-SG（チバガイギー社製）の反応性染料２．０ｇを添加して十分撹拌し、完全に溶解させて墨汁を得た。
（実施例２）
イオン交換水５０ｍｌにポリエチレングリコール（重量平均分子量１００００）２０ｇを溶解し、室温で撹拌しながら、商品名 Cibacron Black P-SG（チバガイギー社製）の反応性染料２．０ｇを添加して十分撹拌し、完全に溶解させて墨汁を得た。
（実施例３）
イオン交換水５０ｍｌにポリエチレングリコール（重量平均分子量２００００）２０ｇを溶解し、室温で撹拌しながら、商品名 Cibacron Black P-SG（チバガイギー社製）の反応性染料２．０ｇを添加して十分撹拌し、完全に溶解させて墨汁を得た。
(Example 1)
Dissolve 20 g of polyethylene glycol (weight average molecular weight 8000) in 50 ml of ion-exchanged water, add 2.0 g of the reactive dye under the trade name Cibacron Black P-SG (Ciba Geigy) and stir well while stirring at room temperature. The ink was obtained by completely dissolving.
(Example 2)
Dissolve 20 g of polyethylene glycol (weight average molecular weight 10,000) in 50 ml of ion-exchanged water, add 2.0 g of the reactive dye of the trade name Cibacron Black P-SG (manufactured by Ciba Geigy) and stir well while stirring at room temperature. The ink was obtained by completely dissolving.
Example 3
Dissolve 20 g of polyethylene glycol (weight average molecular weight 20000) in 50 ml of ion-exchanged water, add 2.0 g of the reactive dye of the trade name Cibacron Black P-SG (manufactured by Ciba Geigy) and stir well while stirring at room temperature. The ink was obtained by completely dissolving.
（比較例１）
イオン交換水５０ｍｌにポリエチレングリコール（重量平均分子量３０００）２０ｇを溶解し、室温で撹拌しながら、商品名 Cibacron Black P-SG（チバガイギー社製）の反応性染料２．０ｇを添加して十分撹拌し、完全に溶解させて墨汁を得た。
(Comparative Example 1)
Dissolve 20 g of polyethylene glycol (weight average molecular weight 3000) in 50 ml of ion-exchanged water, and add 2.0 g of a reactive dye under the trade name Cibacron Black P-SG (Ciba Geigy) while stirring at room temperature. The ink was obtained by completely dissolving.
（消色性試験）
綿ブロードの試験布に、水を含まない画筆（平筆４号）を用いて上記実施例１〜３及び比較例１の墨汁を塗布し、室温で指触乾燥するまで放置した。乾燥後、洗濯機で合成洗剤（メーカー指定濃度に調整：２０ｇ／ｌ）を使用して，２０℃で１５分間洗濯を行ない、１５分間水洗した。乾燥後、色差計で塗布部と未塗布部のＬ＊ａ＊ｂを測定して色差（△Ｅ＊）を算出し、４未満を消去性墨汁として合格とした。結果を表１に示す。
(Decolorization test)
The inks of Examples 1 to 3 and Comparative Example 1 were applied to a cotton broad test cloth using a paint brush (flat brush No. 4) that did not contain water, and allowed to stand until it was dry to the touch at room temperature. After drying, using a synthetic detergent (adjusted to the manufacturer's specified concentration: 20 g / l) in a washing machine, washing was carried out at 20 ° C. for 15 minutes and then washed with water for 15 minutes. After drying, the color difference (ΔE *) was calculated by measuring L * a * b of the coated part and the uncoated part with a color difference meter, and less than 4 was accepted as erasable ink. The results are shown in Table 1.
（粘度測定）
Ｅ型粘度計で粘度を測定した。
測定条件（温度、回転数）及び測定結果を表１に示す。
(Viscosity measurement)
The viscosity was measured with an E-type viscometer.
Table 1 shows the measurement conditions (temperature, rotation speed) and measurement results.
本発明は、衣類等に付着した場合に、家庭での洗濯によって簡単に消去することができる消去性墨汁に用いることができる。 INDUSTRIAL APPLICATION When this invention adheres to clothes etc., it can be used for the erasable ink which can be easily erased by washing at home.
Claims (2)
前記染料が反応性染料又は酸性染料であり、
前記ポリエチレングリコールの重量平均分子量が８０００〜２００００（前記ポリエチレングリコールの重量平均分子量が８０００を除く。）であり、
前記ポリエチレングリコールの墨汁に対する割合が、５〜４０重量％であり、
前記ポリエチレングリコール（Ａ）の前記水（Ｂ）に対する割合（Ａ／Ｂ）が０．０５〜０．８であることを特徴とする消去性墨汁。 An erasable ink containing a dye, polyethylene glycol and water,
The dye is a reactive dye or an acid dye,
The polyethylene glycol has a weight average molecular weight of 8000 to 20,000 (excluding the weight average molecular weight of the polyethylene glycol of 8,000).
The ratio of the polyethylene glycol to the ink is 5 to 40% by weight,
An erasable ink liquor, wherein the ratio (A / B) of the polyethylene glycol (A) to the water (B) is 0.05 to 0.8.
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