阅读说明：本技术 一种适用于高速喷墨打印的活性染料墨水及其制备方法 (Reactive dye ink suitable for high-speed ink-jet printing and preparation method thereof ) 是由 刘健 杨秋艳 王凤斌 于 2020-12-23 设计创作，主要内容包括：本发明涉及喷墨打印活性墨水技术领域,具体是一种适用于高速喷墨打印的活性染料墨水及其制备方法,该活性染料墨水包括复配表面活性剂和保湿剂,复配表面活性剂0.1％水溶液的动态表面张力为33mN/m至45mN/m,静态表面张力为20mN/m至42mN/m,保湿剂为丙酮缩甘油。该活性染料墨水在高速打印工况下打印性能良好,不易发生渗化现象,并且还具备较好的待机性能。(The invention relates to the technical field of ink-jet printing active ink, in particular to active dye ink suitable for high-speed ink-jet printing and a preparation method thereof, wherein the active dye ink comprises a compound surfactant and a humectant, the dynamic surface tension of a 0.1% aqueous solution of the compound surfactant is 33mN/m to 45mN/m, the static surface tension is 20mN/m to 42mN/m, and the humectant is acetonide. The reactive dye ink has good printing performance under high-speed printing working conditions, is not easy to generate a bleeding phenomenon, and also has good standby performance.)

1. A reactive dye ink suitable for high-speed ink-jet printing is characterized in that:

the composite surfactant-containing water-based anti-static fabric softener comprises a composite surfactant and a humectant, wherein the dynamic surface tension of a 0.1% water solution of the composite surfactant is 33mN/m to 45mN/m, the static surface tension of the composite surfactant is 20mN/m to 42mN/m, and the humectant is acetone acetal.

2. The reactive dye ink suitable for high speed inkjet printing according to claim 1 wherein:

the compound surfactant comprises a first surfactant and a second surfactant, wherein the first surfactant is an organic silicon surfactant, and the second surfactant is an alkynol surfactant.

3. The reactive dye ink suitable for high speed inkjet printing according to claim 2 wherein:

the first surfactant is selected from at least one of EXP4123 or Dynol980, and the second surfactant is selected from at least one of Surfynol 465 or Surfynol 485.

4. A reactive dye ink suitable for high speed inkjet printing according to any one of claims 1 to 3 wherein:

the water-based color-changing dye comprises, by weight, 8% to 20% of reactive dye, 20% to 50% of aqueous organic solvent, 1% to 3% of the compound surfactant, 3% to 10% of the humectant, 0.1% to 1% of a pH regulator, 0.1% to 1% of an antibacterial agent, and the balance of water.

5. The reactive dye ink suitable for high speed inkjet printing according to claim 4 wherein:

the dynamic surface tension of the reactive dye ink is 28mN/m to 37mN/m, and the static surface tension is 26mN/m to 35 mN/m.

6. The reactive dye ink suitable for high speed inkjet printing according to claim 4 wherein:

the pH value of the reactive dye ink is 7-8, and the viscosity is 5 cP-7 cP.

7. The method of claim 4 for preparing a reactive dye ink suitable for high speed ink jet printing, comprising the steps of:

s1: weighing 8-20% of reactive dye by weight percent for later use, then weighing 20-50% of aqueous organic solvent, 1-3% of compound surfactant, 3-10% of humectant, 0.1-1% of pH regulator, 0.1-1% of antibacterial agent and the balance of water, stirring and mixing at the rotating speed of 600-800 rpm at room temperature for 30-60 min to obtain mixed solution;

s2: adding the weighed reactive dye into the mixed solution, stirring and mixing at the rotating speed of 600rpm to 800rpm for 60min to 90min at room temperature, and filtering by using a filter membrane with the aperture of 0.2 mu m.

Technical Field

The invention relates to the technical field of ink-jet printing reactive ink, in particular to reactive dye ink suitable for high-speed ink-jet printing and a preparation method thereof.

Background

The reactive dye ink has direct injection property, strong color expression and good color fastness, and is suitable for the ink-jet printing of natural fiber textiles. In recent years, high-speed printing has become the main development direction of printing industry, and corresponding industrial-grade nozzle products, such as KJ4B-QA06 nozzles capable of realizing high-speed printing of 1.5m/s to 1.8m/s, are derived in the field of printing equipment. Under the high-speed printing working condition, the common reactive dye ink is easy to generate the bleeding phenomenon, and the fineness of the printed patterns is reduced, so that the formula of the reactive dye ink needs to be improved in a targeted manner. In addition, the reactive dye ink suitable for the high-speed ink-jet printing working condition needs to have certain quick-drying performance, but the drying speed of the quick-drying ink in the standby process is high, and the nozzle is easy to block after being standby for a long time, so that the service performance is influenced.

Disclosure of Invention

The first purpose of the invention is to provide the reactive dye ink which has better printing performance and standby performance and is suitable for high-speed ink-jet printing.

The second purpose of the invention is to provide a preparation method of the reactive dye ink.

In order to achieve the first object, the invention provides reactive dye ink suitable for high-speed ink-jet printing, which is characterized by comprising a compound surfactant and a humectant, wherein the dynamic surface tension of a 0.1% aqueous solution of the compound surfactant is 33mN/m to 45mN/m, the static surface tension is 20mN/m to 42mN/m, and the humectant is acetone acetal.

According to the scheme, the surfactant with the dynamic surface tension and the static surface tension meeting the requirements can effectively regulate and control the diffusion state of the ink drops on the printing fabric under the high-speed printing working condition, so that the penetration speed of the ink drops on the printing fabric is greater than the diffusion speed, the downward penetration of the ink drops is promoted, the left and right penetration of the ink drops is weakened, the ink piling phenomenon is not easy to occur even if a thicker fabric is printed, the fineness of printed patterns is improved, and the printing performance of the reactive dye ink can be effectively improved. However, it is difficult to find a single surfactant which can simultaneously meet the requirements of the dynamic surface tension and the static surface tension in the market at present, so that different surfactants need to be selected for compounding in practical application. The acetone-glycerol has strong hygroscopicity, can slow down the volatilization of water in ink when being used as a humectant, reduces the drying speed of the ink, can ensure the wetting of a spray head in a long standby time by adding a small amount of the acetone-glycerol, and prevents the printing problems of inclined spraying, broken lines and the like caused by the drying of the ink in the spray head, so that the standby performance of the reactive dye ink can be improved.

The further scheme is that the compound surfactant comprises a first surfactant and a second surfactant, wherein the first surfactant is an organic silicon surfactant, and the second surfactant is an alkynol surfactant.

Therefore, the two different types of surfactants have certain complementarity in function, so that the compounded surfactant can play a good dispersing function in different formula systems.

Further, the first surfactant is selected from at least one of EXP4123 or Dynol980, and the second surfactant is selected from at least one of Surfynol 465 or Surfynol 485.

From the above, the EXP4123 of Japanese Beacon chemistry and the Dynol980 won from the United states have larger difference of dynamic and static surface tension, the Surfynol 465 and Surfynol 485 won from the United states have smaller difference of dynamic and static surface tension, and the compounded surfactant meeting the requirements of the dynamic and static surface tension can be easily obtained by compounding the two surfactants with the dynamic and static surface tension meeting the specific rules.

The further scheme is that the dye comprises, by weight, 8% to 20% of reactive dye, 20% to 50% of aqueous organic solvent, 1% to 3% of compound surfactant, 3% to 10% of humectant, 0.1% to 1% of pH regulator, 0.1% to 1% of antibacterial agent, and the balance of water.

Therefore, the ink according to the component proportion can form a stable dispersion system, the proportion of various components contained in the ink is reasonable, the compound surfactant can play an ideal regulating and controlling effect on the diffusion state of ink drops on printing fabrics under the high-speed printing working condition, and the humectant can ensure that the ink wets a nozzle within a long standby time.

In specific implementation, the water-soluble organic solvent can be ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol or glycerol, the pH regulator can be triethanolamine, diethanolamine, ammonia water or sodium hydroxide, and the bactericide can be 1, 2-benzisothiazol-3-one.

Further, the dynamic surface tension of the reactive dye ink is 28mN/m to 37mN/m, and the static surface tension is 26mN/m to 35 mN/m.

Therefore, by using the compound surfactant and preparing the reactive dye ink according to the proportion, the static surface tension and the dynamic surface tension of the ink can be controlled within the ranges, the penetration speed of ink drops on a printing fabric under a high-speed printing working condition is ensured to be greater than the diffusion speed, and a better printing effect is obtained.

In a further scheme, the pH value of the reactive dye ink is 7 to 8, and the viscosity is 5cP to 7 cP.

Therefore, the ink is prepared into alkalescence so as to ensure the dye uptake of the reactive dye, and the ink with lower viscosity is more suitable for the high-speed printing working condition.

In order to achieve the second object, the present invention provides a method for preparing the reactive dye ink suitable for high-speed inkjet printing, which is characterized by comprising the following steps:

s1: weighing 8-20% of reactive dye by weight percent for later use, then weighing 20-50% of aqueous organic solvent, 1-3% of compound surfactant, 3-10% of humectant, 0.1-1% of pH regulator, 0.1-1% of antibacterial agent and the balance of water, stirring and mixing at the rotating speed of 600-800 rpm for 30-60 min under the condition of room temperature to obtain mixed liquid.

S2: adding the weighed reactive dye into the mixed solution, stirring and mixing at the rotating speed of 600 rpm-800 rpm for 60 min-90 min at room temperature, and filtering by using a filter membrane with the aperture of 0.2 mu m.

Detailed Description

The invention prepares the reactive dye ink suitable for high-speed ink-jet printing according to the following steps:

s1: weighing 8-20% of reactive dye by weight percent for later use, weighing 20-50% of aqueous organic solvent, 1-3% of compound surfactant, 3-10% of humectant, 0.1-1% of pH regulator, 0.1-1% of antibacterial agent and the balance of water, adding the mixture into a stirring kettle, and stirring and mixing the mixture at the rotating speed of 600-800 rpm for 30-60 min at room temperature to obtain mixed liquid.

S2: adding the weighed reactive dye into the mixed solution, stirring and mixing at the rotating speed of 600 rpm-800 rpm for 60 min-90 min at room temperature, and filtering by using a filter membrane with the aperture of 0.2 mu m.

Wherein a 0.1% aqueous solution of the built surfactant (0.1% aqueous solution means a solution of 0.1g solute in 100g water, and 0.1% aqueous solution mentioned elsewhere herein is as defined herein) has a dynamic surface tension of from 33 to 45mN/m and a static surface tension of from 20 to 42 mN/m. The compound surfactant comprises a first surfactant and a second surfactant, the first surfactant is selected from at least one of EXP4123 and Dynol980, the second surfactant is selected from at least one of Surfynol 465 and Surfynol 485, and the humectant is glycerol acetonide.

Examples and comparative examples

Referring to table 1, examples one to four used c.i.reactive Black 5, c.i.reactive Blue 49, c.i.reactive Red 195, and c.i.reactive yellow 145 as reactive dyes; using glycerol, ethylene glycol and diethylene glycol as aqueous organic solvents; triethanolamine is used as a pH regulator; 1,2 benzisothiazol-3-one is used as a bactericide; EXP4123 (dynamic surface tension of a 0.1% aqueous solution of 46mN/m and static surface tension of 28.7mN/m) of Japan Hitachi chemical and/or Dynol980 (dynamic surface tension of a 0.1% aqueous solution of 41mN/m and static surface tension of 23mN/m) created by America were used as the first surfactant; and Surfynol 465 and/or Surfynol 485 (both of which have the dynamic surface tension of about 44mN/m and the static surface tension of about 42mN/m in 0.1% aqueous solution) won and created in the United states are used as second surfactants, the dynamic surface tension of the compound surfactant is within the range of 33mN/m to 45mN/m, and the static surface tension is within the range of 20mN/m to 42 mN/m.

The reactive dyes used in the first comparative example are the same as those used in the third example in terms of variety and amount, and the reactive dyes used in the second comparative example are the same as those used in the second example in terms of variety and amount. The two comparative examples are in agreement with the examples in terms of the choice of the remaining components, except for the use of surfactants which are clearly incompatible with the requirements of the built surfactants in terms of dynamic and static surface tension of the BYK 3450 from germany.

Table 1: reactive dye ink ingredient list and dynamic and static surface tension conditions

The pH value of the reactive dye ink prepared in the first to the fourth examples is detected to be in the range of 7 to 8, and the viscosity is detected to be in the range of 5cP to 7 cP.

Print smoothness test

The reactive dye inks prepared in the first to fourth examples and the first and second comparative examples are taken to be 100mL respectively, and an industrial textile printing ink-jet printer provided with a KJ4B-QA06 spray head of Beijing porcelain is used for carrying out printing test according to a single color block, 100% ink-jet setting and a printing speed of 1.5m/s to 1.8m/s, wherein the printing medium is cotton cloth when the test is carried out while printing. Tests prove that the reactive dye inks prepared in the four embodiments and the two comparative examples can ensure continuous printing within 100ml, and the printing is smooth and has no white line, so that the reactive dye inks prepared by the method can adapt to the working condition of high-speed continuous ink-jet printing.

Color development Effect test

The reactive dye inks prepared in the third embodiment and the first comparative example are used for printing a single color block with the same size on cotton cloth as a print sample by an industrial textile printing ink-jet printer which is provided with a KJ4B-QA06 spray head according to the same ink-jet setting, and then the print sample is subjected to air-steaming treatment under the same conditions. Tests show that the edges of the color blocks of the corresponding printing sample in the third embodiment before and after steaming are clear and sharp, the phenomenon of bleeding does not occur, and the color blocks after steaming are uniform in color; and the edges of the color blocks of the corresponding printing sample before and after the steam evaporation are both in a zigzag shape, namely, the obvious bleeding phenomenon exists, the local color blocks of the printing sample after the steam evaporation are slightly mottled, and the color is not uniform enough, which shows that the reactive dye ink prepared by the invention still has good printing performance under the working condition of high-speed ink-jet printing.

Standby performance testing

Taking 1000ml of each of the reactive dye inks prepared in the first to fourth examples and the first and second comparative examples, continuously printing a printing fabric with the length of 100m by using an industrial textile printing ink-jet printer provided with a KJ4B-QA06 spray head according to a single color block and 100% ink-jet setting, standing for 12h after printing is completed, and then printing test strips, wherein the environmental temperature and the environmental humidity are controlled at 25 ℃ and 45 ℃ in the printing and standing stages. Tests show that the test strips corresponding to the first to the fourth examples are completely printed, and the test strips corresponding to the first and the second comparative examples are partially lost, so that the reactive dye ink prepared by the invention can still keep a spray head wet after being standby for a long time, and has better standby performance.

Storage stability test

The reactive dye inks prepared in examples one to four and comparative examples one and two were measured for initial viscosity and pH value, viscosity and pH value after 7 days of oven aging at 60 c, and viscosity and pH value after 6 months of natural standing, respectively, and the results of the measurements are shown in table 2. As can be seen from Table 2, the viscosity and pH value of the reactive dye ink prepared in the four examples and the two comparative examples after 7 days of aging treatment or natural standing for 6 months have no obvious change relative to the initial value, and the pH value of the reactive dye ink meets the ideal range of 7 to 8, which shows that the reactive dye ink prepared by the invention has good storage stability.

Table 2: storage stability test results