阅读说明：本技术 一种高温直喷分散染料墨水及其制备方法、打印方法 (High-temperature direct-injection disperse dye ink, preparation method thereof and printing method ) 是由 陈奕雄 李泽明 于 2020-12-31 设计创作，主要内容包括：本发明涉及分散染料墨水领域,具体是一种高温直喷分散染料墨水及其制备方法和打印方法。该墨水包括高温分散染料色浆、水性树脂和触变性调节剂。水性树脂的分子量大于5000,酸值小于200(KOH)/(mg/g),触变性调节剂为聚羧酸铵盐型聚合物。该墨水具备较好的耐水洗色牢度和耐摩擦色牢度,并且通过引入触变性调节剂可消除水性树脂对墨水触变特性带来的不利影响,保证墨水的起喷性能和打印流畅度。该墨水对应的印花织物并可免去印后水洗处理,因此使用该墨水有助于提高印花效率。(The invention relates to the field of disperse dye ink, in particular to high-temperature direct-injection disperse dye ink, a preparation method and a printing method thereof. The ink comprises high-temperature disperse dye color paste, water-based resin and a thixotropy regulator. The molecular weight of the aqueous resin is more than 5000, the acid value is less than 200(KOH)/(mg/g), and the thixotropy regulator is an ammonium polycarboxylate type polymer. The ink has good color fastness to washing and rubbing, adverse effects of the water-based resin on thixotropic property of the ink can be eliminated by introducing the thixotropic regulator, and the ink ejection performance and printing smoothness are ensured. The printing fabric corresponding to the ink can avoid washing treatment after printing, so that the use of the ink is beneficial to improving the printing efficiency.)

1. The high-temperature direct-injection disperse dye ink comprises high-temperature disperse dye color paste and is characterized in that:

the thixotropic agent also comprises water-based resin and a thixotropy regulator, wherein the molecular weight of the water-based resin is more than 5000, the acid value of the water-based resin is less than 200(KOH)/(mg/g), and the thixotropy regulator is an ammonium polycarboxylate type polymer.

2. The high temperature direct injection disperse dye ink according to claim 1, wherein:

the water-based resin is water-based styrene acrylic resin or water-based styrene maleic anhydride resin.

3. The high temperature direct injection disperse dye ink according to claim 1, wherein:

the thixotropy regulator is REOTAN LAM or NOPCALL 5200.

4. The high temperature direct injection disperse dye ink according to claim 1, wherein:

the high-temperature disperse dye color paste comprises 18 to 22 weight percent of high-temperature disperse dye.

5. The high temperature direct injection disperse dye ink according to claim 1, wherein:

the high-temperature disperse dye color paste comprises a dispersant, wherein the dispersant is at least one of BYK-190, Tego Dispers750W and Solsperse 27000.

6. The high temperature direct injection disperse dye ink according to any one of claims 1 to 5, wherein:

the high-temperature disperse dye color paste comprises, by weight, 15% to 35% of the high-temperature disperse dye color paste, 2% to 5% of the aqueous resin, 0.5% to 1.5% of the thixotropy regulator, 20% to 40% of the aqueous organic solvent, 0.2% to 1% of the surfactant, 0.02% to 1% of the auxiliary agent composition, and the balance of water, wherein the auxiliary agent composition comprises a pH regulator and a bactericide, and the viscosity of the high-temperature disperse dye color paste is 10cP to 25 cP.

7. The method of preparing a high temperature direct injection disperse dye ink as claimed in claim 6, comprising the steps of:

a. grinding 18 to 22 percent of high-temperature disperse dye, 4 to 10 percent of dispersant, 10 to 15 percent of aqueous organic solvent, 0.1 to 1 percent of bactericide and the balance of water by using zirconium beads with the particle size of 0.1 to 0.3mm under the rotating speed condition of 300 to 600rpm for 15 to 20 hours to obtain high-temperature disperse dye color paste according to the weight percentage;

b. according to the weight percentage, 15 to 35 percent of high-temperature disperse dye color paste, 2 to 5 percent of water-based resin, 0.5 to 1.5 percent of thixotropy regulator, 20 to 40 percent of water-based organic solvent, 0.2 to 1 percent of surfactant, 0.02 to 1 percent of auxiliary composition and the balance of water are stirred and mixed at the rotating speed of 200rpm to 400rpm for 60min to 90min at room temperature, and then are filtered by a 0.45 mu m pore filter membrane, wherein the auxiliary composition comprises a pH regulator and a bactericide.

8. A printing method of high-temperature direct-injection disperse dye ink is characterized by comprising the following steps:

ink-jet printing the high-temperature direct-injection disperse dye ink of claim 6 onto a printing fabric to obtain a jet-printed fabric;

and drying the spray printing fabric at the temperature of 50-60 ℃, and fixing the color for 1-5 min at the temperature of 180-220 ℃.

Technical Field

The invention relates to the field of disperse dye ink, in particular to high-temperature direct-injection disperse dye ink, a preparation method and a printing method thereof.

Background

The high-temperature direct-injection dispersion ink can be directly sprayed and printed on textiles, printing production can be completed through heating color development, transfer printing operation is omitted compared with the traditional low-temperature thermal transfer printing process, the phenomenon of staining generated when roll-to-roll printing is carried out after transfer printing paper is printed is avoided, and high-quality products can be obtained through a more convenient process in the printing industry. However, the current textile printed by the high-temperature direct-injection dispersion ink generally has the problems of poor color fastness to washing and poor color fastness to rubbing, so that the ink formula needs to be further improved to improve the relevant performance.

Disclosure of Invention

The first purpose of the invention is to provide high-temperature direct-injection disperse dye ink with good standby performance.

The second objective of the invention is to provide a preparation method of the high-temperature direct injection disperse dye ink.

The third objective of the present invention is to provide a printing method of the high-temperature direct injection disperse dye ink.

In order to achieve the first purpose, the invention provides high-temperature direct injection disperse dye ink, which comprises high-temperature disperse dye color paste and is characterized by further comprising water-based resin and a thixotropy regulator. The molecular weight of the aqueous resin is more than 5000, the acid value is less than 200(KOH)/(mg/g), and the thixotropy regulator is an ammonium polycarboxylate type polymer.

According to the scheme, the water-based resin meeting the requirements of the molecular weight and the acid value has good water resistance, the water-based resin in the disperse dye ink can be effectively formed into a film in the baking and color development link of the fabric, the resin film can tightly coat the fabric fibers after the fabric is subjected to color fixation and cooling, the effects of reducing surface flooding and improving the dry-wet friction color fastness of the disperse dye are achieved, and the glossiness of a printed pattern can be improved by the resin film, so that the fabric can be free from washing treatment after being printed.

Usually, resin components are not directly added into high-temperature direct-injection disperse dye ink, but only added into treatment liquid, the treatment liquid is independently sprayed and printed on a fabric before printing, because the thixotropic property of the ink is obviously changed by directly introducing the water-based resin, the viscosity of the ink in a static state is far higher than that of a flowing state, and the printing performance of the ink is adversely affected, particularly the problem that the ink does not completely or completely appear in an ejection head in an ejection link of the ink-jet printing, so that the local defect of the printing is caused, and the adverse effect of the water-based resin on the thixotropic property of the ink can be eliminated by specifically introducing a specific type of thixotropic regulator, so that the ejection performance and the printing fluency of the ink are ensured.

In a further scheme, the water-based resin is water-based styrene acrylic resin or water-based styrene maleic anhydride resin.

Therefore, the two types of resins have good water resistance after forming a film, can effectively improve the adhesive force of the ink to the fabric, and improve the color fastness of the ink. At present, Joucryl HPD296 aqueous styrene acrylic acid of BASF in mainstream manufacturers and SMA1000MA and SMA1440 aqueous styrene maleic anhydride resins of Creviley in France meet the requirements of molecular weight and acid value.

Further, the thixotropy modulator is REOTAN LAM or NOPCALL 5200.

As can be seen from the above, REOTAN LAM by Lamberti Italy and NOPCALL 5200 by SAN NOPCO Japan are both representative thixotropic modifiers of polycarboxylate polymer type and are applicable to the field of disperse dye inks.

The further proposal is that the high-temperature disperse dye color paste comprises 18 to 22 percent of high-temperature disperse dye by weight percentage.

Therefore, the high-temperature disperse dye has higher sublimation fastness and is suitable for hot-melt dyeing, also called as S-type dye. The viscosity of the color paste is not too high to form a dispersion system with satisfactory thixotropic properties, so that the viscosity of the color paste needs to be controlled by controlling the content of the high-temperature disperse dye in the dispersion system.

The further scheme is that the high-temperature disperse dye color paste comprises a dispersant which is at least one of BYK-190, Tego dispersions 750W and Solsperse 27000.

Therefore, the lignosulfonate dispersant commonly used in the field is dark brown, the color expression of the ink can be influenced, the dispersant can still be dissolved out after the printed fabric is in water, and the printed fabric can be stained after the printed fabric is in water if the printed fabric is not subjected to washing treatment after printing. Thus, replacing such conventional dispersants with colorless grades of aqueous solutions can really avoid post-press laundering of the fabric. The early test stage determines that BYK-190 of Bik, Germany, Tego Dispers750W won in the United states and Solsperse27000 of Lubrizol in the United states can achieve good effects on promoting or buffering the transformation of the dye crystal form, promoting the dye dissolution and stabilizing the crystal form, the aqueous solution is colorless and transparent, and the corresponding jet printing fabric can really avoid the washing operation after printing.

The further scheme is that the high-temperature disperse dye color paste comprises, by weight, 15% to 35% of high-temperature disperse dye color paste, 2% to 5% of aqueous resin, 0.5% to 1.5% of thixotropy regulator, 20% to 40% of aqueous organic solvent, 0.2% to 1% of surfactant, 0.02% to 1% of auxiliary agent composition and the balance of water, wherein the auxiliary agent composition comprises a pH regulator and a bactericide, and the viscosity of the high-temperature disperse dye color paste is 10cP to 25 cP.

Therefore, the disperse dye ink according to the proportion can form a stable disperse system, the viscosity of the high-temperature disperse dye color paste is lower, the proportion of the color paste, the water-based resin and the thixotropy regulator is proper, and the viscosity and the thixotropy property of the ink can be controlled in an ideal range.

In order to achieve the second object, the present invention provides a method for preparing the high-temperature direct injection disperse dye ink, comprising the following steps:

a. grinding 18 to 22 percent of high-temperature disperse dye, 4 to 10 percent of dispersant, 10 to 15 percent of aqueous organic solvent, 0.1 to 1 percent of bactericide and the balance of water by using zirconium beads with the particle diameter of 0.1 to 0.3mm under the rotating speed condition of 300 to 600rpm for 15 to 20 hours to obtain the high-temperature disperse dye color paste.

b. According to the weight percentage, 15 to 35 percent of high-temperature disperse dye color paste, 2 to 5 percent of water-based resin, 0.5 to 1.5 percent of thixotropy regulator, 20 to 40 percent of water-based organic solvent, 0.2 to 1 percent of surfactant, 0.02 to 1 percent of auxiliary composition and the balance of water are stirred and mixed at the rotating speed of 200rpm to 400rpm for 60min to 90min at room temperature, and then are filtered by a 0.45 mu m pore filter membrane, wherein the auxiliary composition comprises a pH regulator and a bactericide.

According to the scheme, the high-temperature disperse dye color paste according with the proportion can meet the viscosity requirement, and the uniformity and stability of the color paste can be ensured through long-time grinding treatment. The proportion of each component in the total mixing link is proper, and an ink product with ideal viscosity and thixotropic property can be obtained.

Specifically, the water-soluble organic solvent can be at least one of ethylene glycol, diethylene glycol, glycerol, propylene glycol and 1, 3-pentanediol, the surfactant can be at least one of American winning creation Dynol604, Surfynol 465, Becky BYK-348 in Germany and Tianjin Seffield D-504, the pH regulator can be triethanolamine, diethanolamine, ammonia water or sodium hydroxide water solution, and the bactericide can be 1, 2-benzisothiazol-3-one.

In order to achieve the third object, the present invention provides a method for printing with high-temperature direct injection disperse dye ink, comprising the steps of:

carrying out ink-jet printing on the high-temperature direct-injection disperse dye ink on a printing fabric to obtain a jet printing fabric; drying the spray printing fabric at the temperature of 50-60 ℃, and fixing the color for 1-5 min at the temperature of 180-220 ℃.

According to the scheme, the disperse dye ink has direct injection property, the color fixing time required by the corresponding printed fabric is short, and the washing treatment after printing can be omitted, so that the ink is beneficial to improving the printing efficiency.

Detailed Description

The invention prepares high-temperature direct-injection disperse dye ink according to the following steps:

a. injecting 18 to 22 percent of high-temperature type disperse dye, 4 to 10 percent of dispersant, 10 to 15 percent of aqueous organic solvent, 0.1 to 1 percent of bactericide and the balance of water into a horizontal grinder by weight percent, and grinding for 15 to 20 hours at the rotating speed of 300 to 600rpm to obtain the high-temperature disperse dye color paste, wherein the horizontal grinder uses zirconium beads with the particle size specification of 0.1 to 0.3mm, and the filling amount of the zirconium beads is 70 to 80 percent.

b. According to the weight percentage, 15 to 35 percent of high-temperature disperse dye color paste, 2 to 5 percent of water-based resin, 0.5 to 1.5 percent of thixotropy regulator, 20 to 40 percent of water-based organic solvent, 0.2 to 1 percent of surfactant, 0.02 to 1 percent of auxiliary composition and the balance of water are stirred and mixed at the rotating speed of 200rpm to 400rpm for 60min to 90min at room temperature, and then are filtered by a 0.45 mu m pore filter membrane, wherein the auxiliary composition comprises a pH regulator and a bactericide.

Wherein the water-based resin has a molecular weight of more than 5000 and an acid value of less than 200(KOH)/(mg/g) and is a water-based styrene acrylic resin or a water-based styrene maleic anhydride resin, and the thixotropy regulator is an ammonium polycarboxylate type polymer.

Examples and comparative examples

Referring to tables 1 and 2, examples one to four used disperse blue 60, disperse red 343, disperse yellow 114 and self-mixing high temperature type disperse black as high temperature type disperse dyes, respectively, in the color paste preparation stage (step a); BYK-190, Tego Dispers750W and Solsperse27000 were used as dispersants; using glycerol as an aqueous organic solvent; 1, 2-benzisothiazol-3-one is used as a bactericide; the viscosities of the high-temperature disperse dye color pastes A to H are all in the range of 10cP to 25 cP. Examples one to four in the ink mixing section (step b) Joucryl HPD296 aqueous styrene acrylic resin, SMA1000MA aqueous styrene maleic anhydride resin were used as aqueous resins; using REOTAN LAM, NOPCALL 5200 ammonium polycarboxylate type polymer as thixotropy regulator; using glycerol and ethylene glycol as aqueous organic solvents; BYK 348 and Surfynol 465 were used as surfactants; triethanolamine is used as a pH regulator; 1, 2-benzisothiazol-3-one is used as a bactericide.

Comparative examples one to eight color pastes and inks were prepared using the same procedure as in the examples, but in the color paste preparation procedure, REAX 85A sodium lignosulfonate dispersant from Meadwestvaco was used. In the ink mixing, the resin component and the thixotropy modifier are not used in examples one to four, and the same aqueous resin as in examples one to four but no thixotropy modifier is used in examples five to eight.

Table 1: ingredient table of high-temperature disperse dye color paste

Table 2: high-temperature direct-injection disperse dye ink ingredient table

Colour fastness to rubbing test

Taking the disperse dye inks prepared in the first to fourth embodiments and the first to fourth comparative examples, printing by using a three-head printer provided with an EPSON 4720 nozzle, wherein the printing medium is superfine polyester fiber cloth, performing ink-jet printing according to a single color block and 100% ink-jet setting, drying at 50-60 ℃, and fixing at 180-220 ℃ for 1-5 min to obtain a printed fabric finished product.

A part of the fabric finished products corresponding to the first to fourth examples and the first to fourth comparative examples are taken as samples, and the samples are tested according to the dry/wet rubbing color fastness test method specified in GB/T3920-. In the test result evaluation link, a gray sample card for staining is utilized, 5 grades are classified according to the principle that the staining degree of white cloth is taken as an evaluation principle, the higher the numerical value is, the better the abrasion resistance fastness is, and the test result is shown in table 3. As can be seen from Table 3, the average grade of the dry-wet rubbing fastness and wet-rubbing fastness test of the corresponding samples of the four examples is higher than that of the corresponding samples of the four comparative examples, which shows that the high-temperature direct injection disperse dye ink containing the water-based resin prepared by the invention has better dry/wet rubbing fastness.

Color fastness to washing

The same methods as in the crocking fastness test were used to obtain the samples and the test pieces corresponding to examples one to four and comparative examples one to four as they were (without test, for color difference comparison only), and the test pieces were subjected to the crocking fastness test according to GB/T5713-. And the test result judging link judges according to the original sample and the color difference of the faded sample, 5 grades are classified according to the color difference degree, the higher the numerical value is, the better the color fastness to washing is, and the test result is shown in the table 3. As can be seen from Table 3, the average grade of the test samples corresponding to the four examples in the color fastness to washing test is higher than that of the test samples corresponding to the four comparative examples, which shows that the high temperature direct injection disperse dye ink containing the aqueous resin prepared by the invention has better color fastness to washing.

Table 3: rub/Wash fastness test results

Print smoothness test

2000mL of each of the disperse dye inks prepared in examples one to four and comparative examples five to eight was printed using a three-head printer equipped with an Epson 4720 head, and the print medium was a 1.6m wide portrait roll, and the print smoothness test results are shown in Table 4. As can be seen from table 4, the inks prepared in the four examples can ensure the smoothness of continuous printing within 100m, while the inks prepared in the four comparative examples cannot ensure the smoothness of continuous printing within 10m, which indicates that the adverse effect of the aqueous resin on the thixotropic property of the ink can be eliminated by introducing the thixotropy regulator, so that the thixotropic property of the high-temperature direct-injection disperse dye ink can meet the requirement of jet printing, thereby ensuring the smoothness of printing.

Test for thixotropic Properties

2000mL of each of the disperse dye inks prepared in examples one to four and comparative examples five to eight was taken, and after printing for the same period of time using a three-head printer equipped with an Epson 4720 head, the test strip was placed in a standby state and was printed after waiting for 30 minutes. Then, a round of the test with a standby time of 5min was added for the comparative examples five to eight. In the printing and standby stages, the environmental temperature is controlled at 25 ℃, the environmental humidity is controlled at 50%, and the test results are shown in table 4. It can be seen from table 4 that the inks prepared in the four embodiments can be smoothly ejected after waiting for 30min, the inks prepared in the four comparative examples are difficult to eject after waiting for 30min, incomplete ink discharge or complete ink discharge occurs, and the printing loss of the test strip exceeds 50%, and the printing integrity of the test strip still cannot be guaranteed after the test time of 5min is reduced after the test standard is supplemented.

Table 4: test results of printing fluency and thixotropic property