WO2022135122A1 - 一种适用于高频喷头快速喷墨打印的分散染料墨水 - Google Patents

一种适用于高频喷头快速喷墨打印的分散染料墨水 Download PDF

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WO2022135122A1
WO2022135122A1 PCT/CN2021/135588 CN2021135588W WO2022135122A1 WO 2022135122 A1 WO2022135122 A1 WO 2022135122A1 CN 2021135588 W CN2021135588 W CN 2021135588W WO 2022135122 A1 WO2022135122 A1 WO 2022135122A1
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ink
disperse dye
surfactant
surface tension
frequency
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PCT/CN2021/135588
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French (fr)
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陈奕雄
曾富松
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珠海天威新材料股份有限公司
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/32—Inkjet printing inks characterised by colouring agents
    • C09D11/328—Inkjet printing inks characterised by colouring agents characterised by dyes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/36—Inkjet printing inks based on non-aqueous solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/30—Inkjet printing inks
    • C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes

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  • the invention is based on the Chinese patent with the patent number of 202011516508.9 and the title of “A Disperse Dye Ink Suitable for Rapid Inkjet Printing with High-Frequency Nozzles”.
  • the invention relates to the field of inkjet printing disperse dye inks, and in particular to a Disperse dye inks for fast inkjet printing with high frequency print heads.
  • the existing inkjet printing inks generally have the problem that the rheological properties are easily affected by the working temperature, that is, the viscosity of the ink changes significantly with the working temperature, which will affect the printing fluency, jetting stability and ink dot fineness of the ink. Because the high-frequency nozzle is prone to oblique spray and disconnection after continuous high-frequency operation for a period of time. Therefore, it is necessary to improve the printing ink formulation in a targeted manner to better adapt to the fast printing conditions of high-frequency nozzles.
  • the main purpose of the present invention is to provide a disperse dye ink with reliable performance under the condition of fast ink jet printing with a high frequency nozzle.
  • the present invention provides a disperse dye ink suitable for high-frequency nozzle rapid inkjet printing, including disperse dye paste, water-based organic solvent, pH adjuster and bactericide, and its special feature is that it also includes viscosity. Stabilizers and Compounded Surfactants.
  • the viscosity stabilizer is ethylene glycol
  • the compounded surfactant includes a first surfactant and a second surfactant in a weight ratio of 1:2 to 1:10, and the dynamic surface tension of a 0.1% aqueous solution of the first surfactant and The static surface tensions were both less than 32 mN/m, and the dynamic surface tension and static surface tension of the 0.1% aqueous solution of the second surfactant were both greater than 36 mN/m.
  • a further solution is that the addition amount of the viscosity stabilizer is not less than 10 wt%.
  • the first surfactant is Dynol 604 and Dynol 607 from Evonik, or HMP-579BA and HMP-580BA from Zhejiang Real Madrid Technology Co., Ltd.
  • the second surfactant is Surfynol 465 from Evonik in the United States or HMP-286B from Zhejiang Real Madrid Technology Co., Ltd.
  • the disperse dye ink includes 25% to 50% of disperse dye paste, 1% to 3% of compound surfactant, 10% to 25% of viscosity stabilizer, 5% to 25% by weight percentage. 15% water-soluble organic solvent, 0.05% to 0.2% pH adjuster, 0.1% to 1% bactericide, and the balance is water.
  • the disperse dye paste contains 20% to 30% of dye toner by weight percentage.
  • the disperse dye paste can use commercially available finished color paste or self-made color paste
  • the water-based organic solvent can use diethylene glycol, glycerol, propylene glycol, polyethylene glycol or 1,3-pentanediol
  • the pH adjuster can be Triethanolamine, diethanolamine, ammonia or sodium hydroxide can be used, and 1,2-benzisothiazol-3-one can be used as a bactericide.
  • the static surface tension of the disperse dye ink is 26mN/m to 32mN/m
  • the dynamic surface tension within 3ms is 33mN/m to 42mN/m. 3ms is roughly the time it takes for the ink to fall to the surface of the transfer paper after being ejected from the high-frequency nozzle. Therefore, controlling the dynamic surface tension of the ink within 3ms within the above range can ensure that the ink can form a complete surface before falling on the transfer paper. droplets, thus ensuring the ejection stability of the ink and the fineness of the ink dots.
  • the compound surfactant prepared according to the above ratio can adjust the surface tension of the ink in the ejection state and the adhesion state, thereby improving the ejection stability of the ink and the fineness of the ink dots to adapt to the high frequency inkjet printing conditions.
  • the introduction of the above-mentioned first surfactant can enable the ink to have a low dynamic surface tension in the ejected state, so that the ink can quickly form complete droplets after being ejected from the nozzle, and fall to the transfer in the form of ink droplets. on paper.
  • Further introduction of the above-mentioned second surfactant can make the ink droplets have a larger contact angle when they contact the transfer paper, thereby improving the sharpness of the image.
  • the second surfactant can also provide a certain wettability to the ink, thereby improving the standby performance of the ink.
  • Ethylene glycol is usually used as a water-based organic solvent in inks, but studies have found that it can also improve the stability of the viscosity of aqueous dispersions against temperature changes, so adding ethylene glycol as a viscosity stabilizer to ink alone can cope with high frequency
  • the temperature changes of the continuous operation of the nozzle ensure the stability and reliability of the ink printing performance.
  • the above several mainstream surfactant products can respectively meet the dynamic and static surface tension requirements of the first surfactant and the second surfactant, so they can be used to formulate composite surfactants.
  • a stable dispersion system can be formed, and the ratio of various components contained in it is reasonable, so that the compound surfactant can effectively adjust the surface tension of the ink in the ejection state and the adhesion state, and the temperature stabilizer can Significantly improve the stability of the viscosity of the ink against temperature changes, so as to adapt to high-frequency print heads and to adapt to fast inkjet printing conditions.
  • compound surfactant and preparing disperse dye ink according to the aforementioned ratio can control the static surface tension of the ink and the dynamic surface tension in a specific period of time within the above range to ensure smooth printing of the ink under high frequency inkjet printing conditions To avoid printing defects such as flying ink, broken needle and broken ink.
  • FIG. 1 is a high-frequency inkjet printing effect diagram of the example group on thermal transfer paper.
  • FIG. 2 is a high-frequency inkjet printing effect diagram of the comparative example group on thermal transfer paper.
  • Fig. 3 is the thermal transfer effect diagram of the example group on the ultra-fine polyester fiber cloth.
  • Fig. 4 is the thermal transfer effect diagram of the comparative example group on the ultra-fine polyester fiber cloth.
  • the present invention prepares the disperse dye ink suitable for high-frequency nozzle rapid inkjet printing according to the following steps:
  • S2 inject the dispersion liquid into a horizontal mill and grind for 6h to 8h under the condition of 800rpm to 1200rpm to obtain a disperse dye paste.
  • the horizontal mill uses zirconium beads with a particle size of 0.2mm and the filling amount of the zirconium beads is 70 % to 80%.
  • S3 First weigh 25% to 50% of disperse dye paste by weight percentage, then weigh 1% to 3% of compound surfactant, 10% to 25% of viscosity stabilizer, 5% to 15% The water-soluble organic solvent, 0.05% to 0.2% pH adjuster, 0.1% to 1% bactericide and the balance of water are added to the stirring tank and stirred and mixed at a rotating speed of 200rpm to 400rpm for 10min to 30min at room temperature to obtain a mixed solution .
  • the temperature stabilizer is ethylene glycol
  • the compound surfactant includes the first surfactant and the second surfactant in a weight ratio of 1:2 to 1:10
  • the first surfactant 0.1% aqueous solution (0.1% Aqueous solution refers to the solution obtained by dissolving 0.1g of solute in 100g of water.
  • the 0.1% aqueous solution mentioned elsewhere in the text is the same as the definition here)
  • the dynamic surface tension and static surface tension are both less than 32mN/m
  • the second surfactant is 0.1%
  • the dynamic surface tension and static surface tension of the aqueous solution are both greater than 36 mN/m.
  • Examples 1 to 4 use commercially available Disperse Blue 56, Disperse Red 50, Disperse Yellow 23 and self-mixing low temperature black disperse dyes as blue, red, respectively, in the color paste preparation stage (step S1 and S2). , yellow and black disperse dyes; use MeadWestvaco's REAX85A as a dispersant; use glycerol as a water-soluble organic solvent; use 1,2 benzisothiazol-3-one as a bactericide.
  • Examples 1 to 4 used Dynol 604 and Dynol 607 from Evonik and HMP-579BA and HMP-580BA from Real Madrid as the first surfactant in the color paste preparation stage (steps S3 and S4); Surfynol 465 from Evonik was used and Zhejiang Real Madrid's HMP-586B as the second surfactant; using glycerol as an aqueous organic solvent; using triethanolamine as a pH adjuster; using 1,2 benzisothiazol-3-one as a bactericide.
  • the comparative examples with the same number use the same color paste as the examples, and the comparative examples 1 to 4 use Surfynol 440 (dynamic surface tension 34.5mN/m, static surface tension 32.2mN/m), EnviroGem AE01 (dynamic surface tension 36.1 mN/m, static surface tension 42.3mN/m) and Dynol 360 (dynamic surface tension 35mN/m, static surface tension 28mN/m) are used as surfactant, and the selection of remaining components is consistent with embodiment one to four.
  • Surfynol 440 dynamic surface tension 34.5mN/m, static surface tension 32.2mN/m
  • EnviroGem AE01 dynamic surface tension 36.1 mN/m, static surface tension 42.3mN/m
  • Dynol 360 dynamic surface tension 35mN/m, static surface tension 28mN/m
  • the static surface tension of the disperse dye inks prepared in Examples 1 to 4 is in the range of 26mN/m to 32mN/m, and the dynamic surface tension within 3ms is in the range of 33mN/m to 42mN/m.
  • the four-color disperse dye inks prepared in Examples 1 to 4 and the four-color disperse dye inks prepared in Comparative Examples 1 to 4 were installed on an eight-head printer equipped with an Epson S3200 print head, respectively, and printed the same according to the 24kHz ignition frequency and the same inkjet setting.
  • Figure 1 and Figure 2 are the enlarged partial pictures of the printing patterns of the example group and the comparative example group on the thermal transfer paper at the same position according to the same scale. Subsequently, the patterns printed by the example group and the comparative example group were thermally transferred to the ultrafine polyester fiber cloth at a temperature of 220 °C.
  • Figures 3 and 4 reflect the ultrafine polyester fiber in the example group and the comparative example group, respectively. The overall effect of the transfer pattern on the cloth.
  • the invention is applied to the printing process of the disperse dye ink in the industrial-grade high-frequency nozzle, and the aqueous solution of the first surfactant in the compound active agent in the ink of the invention is less than 32mN by adjusting the dynamic surface tension and the static surface tension /m, so that the ink has the dynamic surface tension of the bottom in the ejection state, and the ink falls on the transfer in the shape of ink droplets; the aqueous solution of the second surfactant in the compound active agent can adjust the dynamic surface tension and static surface tension by adjusting the dynamic surface tension and static surface tension.
  • the ink droplets have a larger contact angle with the transfer paper, which can improve the definition of the convex lines; the viscosity stabilizer in the ink can cope with the temperature change of the high-frequency nozzle connection work, so that through the ink in the ink Add compound active agent and viscosity stabilizer, and adjust their content accordingly to improve the ink jetting and penetration performance and printing fluency, better adapt to the fast printing conditions of high-frequency nozzles, and improve printing efficiency.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Coloring (AREA)

Abstract

本发明涉及喷墨印刷分散染料墨水技术领域，并本发明提供一种适用于高频喷头快速喷墨打印的分散染料墨水，包括分散染料色浆、水性有机溶剂、pH调节剂和杀菌剂，还包括粘度稳定剂和复配表面活性剂。粘度稳定剂为乙二醇，复配表面活性剂包括重量比为1:2至1:10的第一表面活性剂和第二表面活性剂，第一表面活性剂0.1％水溶液的动态表面张力和静态表面张力均小于32mN/m，第二表面活性剂0.1％水溶液的动态表面张力和静态表面张力均大于36mN/m。该墨水具备较好的待机性能，在高频喷墨印刷工况下具备较好的喷射稳定性及墨点精细度，且自身粘度及表面张力对于高频喷头的工作温度变化具备的较好的稳定性。

Description

一种适用于高频喷头快速喷墨打印的分散染料墨水 技术领域
本发明基于专利号为202011516508.9、名称为“一种适用于高频喷头快速喷墨打印的分散染料墨水”的中国专利，本发明涉及喷墨印刷分散染料墨水领域，尤其是涉及一种适用于高频喷头快速喷墨打印的分散染料墨水。
背景技术
近年来，高效印刷已成为印花行业的主要发展方向，因此在印刷设备领域衍生出了与之对应的工业级高频喷头，该喷头能够运行在较高的点火频率下，其喷印速度快，印花效率高，代表性产品有能够稳定运行在24kHz点火频率下的Epson S3200喷头。高频喷头对墨水的喷射及渗透性能都有特别的要求，普通墨水难以适配，会导致印花质量变差。
另外点火频率的提高和喷印速度的加快还会导致喷头明显发热，因此墨水的工作温度也会相应升高。而现有喷印墨水普遍存在流变特性易受工作温度影响的问题，即墨水的粘度随工作温度的变化明显，进而会影响墨水的打印流畅度、喷射稳定性以及墨点精细度，具体表现为高频喷头在连续高频运行一段时间后易出现斜喷、断线现象。因此，有必要针对性地改良喷印墨水配方以更好地适应高频喷头快速喷印工况。
技术问题
本发明的主要目的在于提供一种高频喷头快速喷墨打印工况下性能可靠的分散染料墨水。
技术解决方案
为实现上述目的，本发明提供一种适用于高频喷头快速喷墨打印的分散染料墨水，包括分散染料色浆、水性有机溶剂、pH调节剂和杀菌剂，其特殊之处在于，还包括粘度稳定剂和复配表面活性剂。粘度 稳定剂为乙二醇，复配表面活性剂包括重量比为1:2至1:10的第一表面活性剂和第二表面活性剂，第一表面活性剂0.1％水溶液的动态表面张力和静态表面张力均小于32mN/m，第二表面活性剂0.1％水溶液的动态表面张力和静态表面张力均大于36mN/m。
进一步的方案是，粘度稳定剂的添加量不少于10wt％。
进一步的方案是，第一表面活性剂为美国赢创的Dynol 604、Dynol 607，或者浙江皇马科技股份有限公司的HMP-579BA、HMP-580BA。
进一步的方案是，第二表面活性剂为美国赢创的Surfynol 465或者浙江皇马科技股份有限公司的HMP-286B。
进一步的方案是，该分散染料墨水按重量百分数计包括25％至50％的分散染料色浆、1％至3％的复配表面活性剂、10％至25％的粘度稳定剂、5％至15％的水溶性有机溶剂、0.05％至0.2％的pH调节剂、0.1％至1％的杀菌剂，余量为水。其中，分散染料色浆按重量百分比计含有20％至30％的染料色粉。
具体实施时，分散染料色浆可使用市售成品色浆或自制色浆，水性有机溶剂可使用二甘醇、甘油、丙二醇、聚乙二醇或1，3-戊二醇，pH调节剂可使用三乙醇胺、二乙醇胺、氨水或氢氧化钠，杀菌剂可使用1,2-苯并异噻唑-3-酮。
进一步的方案是，该分散染料墨水的静态表面张力为26mN/m至32mN/m，并且在3ms内的动态表面张力为33mN/m至42mN/m。3ms大致是墨水从高频喷头喷出后落至转印纸表面所需的时间，因此将墨水3ms内的动态表面张力控制在上述范围可保证墨水在落到转印纸上之前能够形成完整的液滴，从而保证墨水的喷射稳定性以及墨点精细度。
有益效果
按照上述比例配制的复配表面活性剂能够调节墨水在喷射状态及附着状态下的表面张力，进而改善墨水的喷射稳定性以及墨点精细度以适应高频喷墨印刷工况。具体地，引入上述第一表面活性剂可使墨水在喷射状态下具备较低的动态表面张力，使得墨水从喷嘴喷出后能够快速形成完整的液滴，并以墨滴的形态落到转印纸上。进一步引入 上述第二表面活性剂可使墨滴在与转印纸接触时具备较大的接触角，从而提高图像的清晰度。第二表面活性剂还可为墨水提供一定的润湿性，进而改善墨水的待机性能。乙二醇在墨水中通常用作水性有机溶剂，但研究发现其还能改善水性分散体系的粘度对于温度变化的稳定性，因此将乙二醇单独作为粘度稳定剂添加到墨水中能够应对高频喷头连续工作的温度变化，进而保证墨水打印性能的稳定和可靠。
并且，前期研究发现乙二醇的添加量达到10wt％以上就可起到提高墨水粘度对于温度变化的稳定性的作用，具体实施时在满足该下限添加量的前提下可根据需要调整实际的添加量。
而上述几种主流表面活性剂产品分别能够满足前述第一表面活性剂和第二表面活性剂对于动态和静态表面张力要求，因此可用于配制复合表面活性剂。
在上述墨水配方能够形成稳定的分散体系，其所含各类成分之间的配比合理，使得复配表面活性剂能够有效调节墨水在喷射状态及附着状态下的表面张力，并且温度稳定剂能够明显改善墨水的粘度对于温度变化的稳定性，以适配高频喷头并适应快速喷墨打印工况。
然后使用复配表面活性剂并按照前述配比制备分散染料墨水可将该墨水的静态表面张力和特定时段动态表面张力控制在上述范围内，保证墨水在高频喷墨印刷工况下的打印流畅度、喷射稳定性以及墨点精细度，避免出现飞墨、断针、断墨等打印缺陷。
附图说明
图1为实施例组在热转印纸上的高频喷墨打印效果图。
图2为对比例组在热转印纸上的高频喷墨打印效果图。
图3为实施例组在超细涤纶纤维布上的热转印效果图。
图4为对比例组在超细涤纶纤维布上的热转印效果图。
以下结合附图和实施例对本发明作进一步说明。
具体实施方式
本发明依照以下步骤制备适用于高频喷头快速喷墨打印的分散染料墨水：
S1：按重量百分比计称取20％至30％的分散染料、5％至10％的分散剂、8％至15％的水性有机溶剂、0.2％至0.5％的杀菌剂和余量水加入搅拌釜并在室温条件下以400rpm至800rpm的转速搅拌混合1h至2h得到分散液。
S2：将分散液注入卧式研磨机中在800rpm至1200rpm转速条件下研磨处理6h至8h得到分散染料色浆，卧式研磨机使用0.2mm粒径规格的锆珠且锆珠的填充量为70％至80％。
S3：按重量百分比先称取25％至50％的分散染料色浆备用，再称取1％至3％的复配表面活性剂、10％至25％的粘度稳定剂、5％至15％的水溶性有机溶剂、0.05％至0.2％的pH调节剂、0.1％至1％的杀菌剂和余量水加入搅拌釜并在室温条件下以200rpm至400rpm的转速搅拌混合10min至30min得到混合液。
S4：将称好的分散染料色浆加入混合液中，并在室温条件下以200rpm至400rpm的转速搅拌混合60min至120min后，用串联设置的1.5μm、1.0μm及0.5μm孔径PP滤芯按照孔径由大到小的顺序依次进行过滤。
其中，温度稳定剂为乙二醇，复配表面活性剂包括重量比为1:2至1:10的第一表面活性剂和第二表面活性剂，第一表面活性剂0.1％水溶液(0.1％水溶液指0.1g溶质溶于100g水中得到的溶液，文中其他地方提到的0.1％水溶液与此处的定义相同)的动态表面张力和静态表面张力均小于32mN/m，第二表面活性剂0.1％水溶液的动态表面张力和静态表面张力均大于36mN/m。
实施例及对比例
参见表1和表2，实施例一至四在色浆制备阶段(步骤S1和S2)使用市售分散兰56、分散红50、分散黄23和自混低温型黑色分散染料分别作为蓝色、红色、黄色、黑色分散染料；使用MeadWestvaco的REAX85A作为分散剂；使用甘油作为水溶性有机溶剂；使用1,2苯并异噻唑-3-酮作为杀菌剂。实施例一至四在色浆制备阶段(步骤S3和S4)使用美国赢创的Dynol 604、Dynol 607和浙江皇马的HMP-579BA、HMP-580BA作为第一表面活性剂；使用美国赢创的Surfynol 465和浙 江皇马的HMP-586B作为第二表面活性剂；使用甘油作为水性有机溶剂；使用三乙醇胺作为pH调节剂；使用1,2苯并异噻唑-3-酮作为杀菌剂。
编号相同的对比例与实施例使用相同的色浆，对比例一至四使用美国赢创的Surfynol 440(动态表面张力34.5mN/m，静态表面张力32.2mN/m)、EnviroGem AE01(动态表面张力36.1mN/m，静态表面张力42.3mN/m)及Dynol 360(动态表面张力35mN/m，静态表面张力28mN/m)作为表面活性剂，并在其余成分的选择上与实施例一至四保持一致。
表1：分散染料色浆成分表
Figure PCTCN2021135588-appb-000001
表2：分散染料墨水成分表
Figure PCTCN2021135588-appb-000002
经检测，实施例一至四制得的分散染料墨水静态表面张力均在26mN/m至32mN/m范围内，并且在3ms内的动态表面张力均在33mN/m至42mN/m范围内。
打印流畅性测试
取实施例一至四及对比例一至四制备的分散染料墨水各5000ml，使用装备Epson S3200喷头的八头打印机按照单一色块、24kHz点火频率、100％喷墨设置执行打印，边打印边观察，打印介质为35g热转印纸，幅宽1.5m，测试总长度500m，打印流畅性情况见表3。从表3可以看出，本发明制备的分散染料墨水在高点火频率下具备较好的打印流畅性，可适配高频喷头并适应快速喷墨打印的工况。
待机性能测试
取实施例一至四及对比例一至四制备的分散染料墨水各5000ml，使用装备Epson S3200喷头的八头打印机按照第一色块、24kHz点火频率、100％喷墨设置，打印1.5m幅宽，长度为100m的热转印纸，完成打印后停机2h，随后再打印测试条，打印及待机阶段均将环境温度控制在25℃，环境湿度控制在43％至45％，测试条的打印情况见表3。从表3可以看出，本发明制备的分散染料墨水经过一定时长待机后不易发生干化堵塞喷头，故具备较好的待机性能。
表3：打印流畅性及停机性能测试结果
Figure PCTCN2021135588-appb-000003
印刷效果测试
将实施例一至四制备的四色分散染料墨水和对比例一至四制备的四色分散染料墨水分别装至配备了Epson S3200喷头的八头打印机上，按照24kHz点火频率及相同的喷墨设置打印相同的彩色图案至35g热转印纸上，图1和图2分别为热转印纸上实施例组和对比例组打印图案在相同部位按照相同比例放大的局部图。随后在220℃温度条件下将实施例组和对比例组所打印的图案热转印至超细涤纶纤维布上，图3和图4分别反映了实施例组和对比例组在超细涤纶纤维布上转印图案的整体效果。
通过比较图1和图2可以看出，实施例组高频喷墨打印至热转印纸上的墨点具备更好的精细度且能更多停留于热转印纸表面，说明实施例组分散染料墨水的喷射性能和附着性能都优于对比例组，因此对应的打印图案更为清晰锐利，颜色也更深，具有更高的转印率。通过比较图3和图4可以看出，实施例组对应的热转印图案相比对比例组具备更强的对比度和颜色饱和度，说明实施例组分散染料墨水的热转印效果更为优异。需要说明的是，图1至4对应的原图均为彩图，转成黑白图后仍可从图案的轮廓、灰阶和对比度情况来判断打印及热转印效果。
最后需要强调的是，本发明不限于上述实施方式，如各组分含量的改变等变化也应该包括在本发明权利要求的保护范围内。
工业应用性
本发明应用于分散染料墨水在工业级高频喷头的打印工艺中，本发明中的墨水中的复配活性剂中的第一表面活性剂的水溶液通过调节动态表面张力和静态表面张力均小于32mN/m，使得墨水在喷射状态时具备交底的动态表面张力，墨水以墨滴的形状落到转印上；复配活性剂中的第二表面活性剂的水溶液通过调节动态表面张力和静态表面张力均小于36mN/m，使得墨滴与转印纸具有较大的接触角，可提高凸线条的清晰度；墨水中的粘度稳定剂能够应对高频喷头连接工作的温度变化，从而通过在墨水中添加复配活性剂和粘度稳定剂，并且相对应地调节其含量，改善墨水的喷射及渗透性能以及打印流畅度，更好地适应高频喷头快速喷印工况，提高印刷效率。

Claims (6)

  1. 一种适用于高频喷头快速喷墨打印的分散染料墨水，包括分散染料色浆、水性有机溶剂、pH调节剂和杀菌剂，其特征在于：
    还包括粘度稳定剂和复配表面活性剂，所述粘度稳定剂为乙二醇，所述复配表面活性剂包括重量比为1:2至1:10的第一表面活性剂和第二表面活性剂，所述第一表面活性剂0.1％水溶液的动态表面张力和静态表面张力均小于32mN/m，所述第二表面活性剂0.1％水溶液的动态表面张力和静态表面张力均大于36mN/m。
  2. 如权利要求1所述的适用于高频喷头快速喷墨打印的分散染料墨水，其特征在于：
    所述粘度稳定剂的添加量不少于10wt％。
  3. 如权利要求1所述的适用于高频喷头快速喷墨打印的分散染料墨水，其特征在于：
    所述第一表面活性剂为Dynol 604、Dynol 607、HMP-579BA或HMP-580BA。
  4. 如权利要求1所述的适用于高频喷头快速喷墨打印的分散染料墨水，其特征在于：
    所述第二表面活性剂为Surfynol 465或HMP-286B。
  5. 如权利要求1至4中任意一项所述的适用于高频喷头快速喷墨打印的分散染料墨水，其特征在于：
    按重量百分数计包括25％至50％的分散染料色浆、1％至3％的所述复配表面活性剂、10％至25％的所述粘度稳定剂、5％至15％的水溶性有机溶剂、0.05％至0.2％的pH调节剂、0.1％至1％的杀菌剂，余量为水，所述分散染料色浆按重量百分比计含有20％至30％的染料色粉。
  6. 如权利要求5所述的适用于高频喷头快速喷墨打印的分散染料墨水，其特征在于：
    该分散染料墨水的静态表面张力为26mN/m至32mN/m，并且在3ms内的动态表面张力为33mN/m至42mN/m。
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