Disperse dye ink and preparation method thereof

Abstract

The invention relates to disperse dye ink and a preparation method thereof. The ink comprises disperse dye color paste, polyol, a humectant, a surfactant, a bactericide and a pH regulator. The polyol is an alcohol containing a plurality of branched chains, and the humectant is an organic compound with strong hygroscopicity and water-retaining property. The ink is high in environmental change adaptability, still has excellent stability under the condition that the temperature difference between winter and summer is large, and is excellent in standby performance and continuous printing performance.

Description

Technical Field

[0001] The invention relates to the field of digital inkjet printing ink, in particular to disperse dye ink and a preparation method thereof. Background Art

[0002] Disperse dyes have a complete color spectrum and excellent performance. They are mainly used for dyeing synthetic fibers such as polyester. With the widespread application of synthetic fibers in the textile field, disperse dye inks have gradually been valued and developed, and the requirements for disperse dye inks have also increased. However, disperse dye inks are greatly affected by the environment. The same ink will have different phenomena when used in winter and summer, such as the ink system is unstable, ink floating in summer, and ink droplets accumulate on the surface of the nozzle, affecting the ink printing performance; in winter, the moisture retention is poor, and there will be needle breakage and slanted spraying during continuous printing. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a disperse dye ink, which can achieve the universality of the ink under conditions with large differences in temperature and humidity.

[0004] To achieve the purpose of the invention, the present invention provides the following technical solutions:

[0005] A disperse dye ink, comprising, by weight percentage:

[0006]

[0007] The balance is water, and the additives include a pH adjuster and a bactericide.

[0008] Furthermore, the disperse dye ink comprises, by weight percentage:

[0009]

[0010] The balance is water, and the additives include a pH adjuster and a bactericide.

[0011] Furthermore, the disperse dye paste is composed of disperse dye, dispersant, surfactant, pH regulator and water, and includes, by weight percentage:

[0012] Disperse dyes 25%-30%

[0013] Dispersant 25%-30%

[0014] Surfactant 2.5%-3%

[0015] pH Adjuster

[0016] The balance is water.

[0017] Preferably, the dispersant is one or a mixture of MF 85A, Joncryl HPD 96, Joncryl HPD 296, D-251 and NNO. When high molecular weight and low molecular weight dispersants are mixed, the dispersant with a small molecular weight will fill the gaps of the macromolecules, increase the charge of the dye particles, reduce the interaction between the particles, make the particle size smaller, and make the system more stable.

[0018] Furthermore, the polyol containing multiple branches is one or a mixture of several of xylitol, sorbitol, mannitol and maltitol.

[0019] Furthermore, the moisturizing agent is an organic compound with strong hygroscopicity and water retention, selected from one or a mixture of hydroxyethyl urea, urea, betaine and sodium pyrrolidonecarboxylate.

[0020] Furthermore, the surfactant is selected from one or a mixture of Surfynol 465, Surfynol 405, BYK 348, BYK346, Dynol 604 and Dynol 607.

[0021] Preferably, the pH regulator is diglycolamine and the bactericide is 1,2-benzisothiazolin-3-one.

[0022] The invention also provides a method for preparing the disperse dye ink, which adopts the following technical scheme:

[0023] A method for preparing disperse dye ink comprises the following steps:

[0024] S1. Put 25%-30% of disperse dye, 25%-30% of dispersant, 2.5%-3% of surfactant, a suitable amount of pH regulator and water in a grinder by weight, and grind with zirconium beads to obtain disperse dye paste;

[0025] S2. Stir and mix 10%-50% disperse dye paste, 20%-50% polyol, 0%-15% moisturizer, 0.5%-1% surfactant, 0.5%-2% additive and the remainder water by weight, and then filter step by step using a filter membrane to obtain disperse dye ink.

[0026] Furthermore, the rotation speed of step (1) is 2000rpm-2800rpm; the particle size of the zirconium beads is 0.1mm-0.3mm, and the grinding time of the zirconium beads is 3h-15h; the stirring time of step (2) is 60min-120min; and the filtration is performed step by step using 1μm and 0.45μm filter membranes.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The polyol used in the disperse dye ink of the present invention contains multiple side chains, so when relative motion occurs, the molecular chain segments are easily entangled, which increases the internal friction between the solution molecules. When the temperature and humidity are high, the ink droplets are relatively stable and are not prone to ink floating; but when the temperature and humidity are low, the moisture retention and fluidity become poor, so organic compounds with strong hygroscopicity and water retention are added to assist, further reducing ink floating, and improving standby performance and continuous printing performance, ultimately achieving the universality of the ink under conditions of large temperature and humidity differences. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is the ink floating condition of Example 1 in a humid environment;

[0030] Figure 2 It is the test image before and after the continuous printing of Example 1;

[0031] Figure 3 This is the effect of Example 1 before and after standby in humidity and low temperature humidity environment;

[0032] Figure 4 This is the ink floating situation of Example 1 in a humid environment;

[0033] Figure 5 These are the test images of Example 1 before and after continuous printing in a humidity environment. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through specific embodiments. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any form of modification and / or change made to the present invention will fall within the protection scope of the present invention.

[0035] In the present invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following embodiments are all conventional methods in the art unless otherwise specified.

[0036] Example 1

[0037] A method for preparing disperse dye ink comprises the following steps:

[0038] (1) 30% of disperse dye, 30% of MF 85A, 3% of Surfynol 465, a suitable amount of diglycolamine to adjust the pH to 8-9, and the balance of water were placed in a grinder, and ground at 2000 rpm using zirconium beads with a particle size of 0.1 mm for 8 h to obtain a disperse dye paste;

[0039] (2) adding 28% of the disperse dye paste obtained in step (1), 42% of xylitol, 10% of urea, 1% of Surfynol 465, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 60 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0040] application:

[0041] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0042] In Example 1, the dispersant MF 85A can be replaced by Joncryl HPD 96, Joncryl HPD 296, D-251 or NNO, or any mixture thereof; the surfactant Surfynol 465 can be replaced by Surfynol 405, BYK 348, BYK 346, Dynol 604 or Dynol 607, or any mixture thereof; xylitol can be replaced by sorbitol, mannitol or maltitol, or any mixture thereof; urea can be replaced by hydroxyethyl urea, betaine or sodium pyrrolidonecarboxylate, or any mixture thereof.

[0043] Example 2

[0044] A method for preparing disperse dye ink, the method comprising the following steps: (1) placing 25% of disperse dye, 25% of Joncryl HPD 96, 2.5% of Surfynol 405, a suitable amount of diglycolamine to adjust the pH to 8-9, and the balance of water in a grinder, and grinding at 2800 rpm using zirconium beads with a particle size of 0.3 mm for 4 hours to obtain a disperse dye color paste;

[0045] (2) adding 10% of the disperse dye paste obtained in step (1), 50% of sorbitol, 1% of Surfynol 405, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 120 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0046] application:

[0047] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0048] In Example 2, the dispersant Joncryl HPD 96 can be replaced by MF 85A, Joncryl HPD 296, D-251 or NNO, or any mixture thereof; the surfactant Surfynol 405 can be replaced by Surfynol 465, BYK 348, BYK 346, Dynol 604 or Dynol 607, or any mixture thereof; sorbitol can be replaced by xylitol, mannitol or maltitol, or any mixture thereof; sodium pyrrolidonecarboxylate can be replaced by urea, hydroxyethyl urea or betaine, or any mixture thereof.

[0049] Example 3

[0050] A method for preparing disperse dye ink, the method comprising the following steps:

[0051] (1) 30% of disperse dye, 30% of Joncryl HPD 296, 3% of BYK 348, a suitable amount of diglycolamine adjusted to 8-9, and the balance of water were placed in a grinder, and ground at 2500 rpm using zirconium beads with a particle size of 0.2 mm for 6 hours to obtain a disperse dye paste;

[0052] (2) adding 50% of the disperse dye paste obtained in step (1), 20% of sorbitol, 15% of urea, 1% of BYK 348, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 100 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0053] application:

[0054] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0055] In Example 3, the dispersant Joncryl HPD 296 can be replaced by Joncryl HPD 96, MF 85A, D-251 or NNO, or any mixture thereof; the surfactant BYK 348 can be replaced by Surfynol 405, Surfynol 465, BYK 346, Dynol 604 or Dynol 607, or any mixture thereof; sorbitol can be replaced by xylitol, mannitol or maltitol, or any mixture thereof; urea can be replaced by sodium pyrrolidonecarboxylate, hydroxyethyl urea or betaine, or any mixture thereof.

[0056] Example 4

[0057] A method for preparing disperse dye ink, the method comprising the following steps:

[0058] (1) 28% of disperse dye, 21% of D-251, 7% of HPD296, 2.5% of Dynol607, a suitable amount of diglycolamine adjusted to 8-9, and the balance of water were placed in a grinder, and ground at 2200 rpm using zirconium beads with a particle size of 0.3 mm for 3 hours to obtain a disperse dye paste;

[0059] (2) adding 40% of the disperse dye paste obtained in step (1), 41% of mannitol, 5% of hydroxyethyl urea, 1% of Dynol 607, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 120 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0060] application:

[0061] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0062] In Example 4, dispersants D-251 and HPD296 can be replaced by Joncryl HPD 96, MF 85A or NNO, or any mixture thereof; surfactant Dynol 607 can be replaced by BYK 348, Surfynol 405, Surfynol 465, BYK 346 or Dynol 604, or any mixture thereof; mannitol can be replaced by sorbitol, xylitol or maltitol, or any mixture thereof; hydroxyethyl urea can be replaced by urea, sodium pyrrolidonecarboxylate or betaine, or any mixture thereof.

[0063] Example 5

[0064] A method for preparing disperse dye ink, the method comprising the following steps:

[0065] (1) 25% of disperse dye, 28% of NNO, 2.8% of BYK 346, a suitable amount of diglycolamine adjusted to 8-9, and the balance of water were placed in a grinder, and ground at 2700 rpm using zirconium beads with a particle size of 0.2 mm for 15 hours to obtain a disperse dye paste;

[0066] (2) adding 38% of the disperse dye paste obtained in step (1), 41% of mannitol, 10% of betaine, 1% of BYK 346, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 80 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0067] application:

[0068] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0069] In Example 5, the dispersant NNO can be replaced by D-251, Joncryl HPD 296, Joncryl HPD 96 or MF 85A, or by any mixture thereof; the surfactant BYK 346 can be replaced by Dynol 607, BYK 348, Surfynol 405, Surfynol 465 or Dynol 604, or by any mixture thereof; mannitol can be replaced by sorbitol, xylitol or maltitol, or by any mixture thereof; betaine can be replaced by hydroxyethyl urea, urea or sodium pyrrolidonecarboxylate, or by any mixture thereof.

[0070] Example 6

[0071] A method for preparing disperse dye ink, the method comprising the following steps:

[0072] (1) 30% of disperse dye, 30% of Joncryl HPD 296, 3% of Dynol 604, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the remainder of water were placed in a grinder, and ground at 2200 rpm using zirconium beads with a particle size of 0.3 mm for 6 hours to obtain a disperse dye paste;

[0073] (2) adding 10% of the disperse dye paste obtained in step (1), 50% of xylitol, 5% of hydroxyethyl urea, 1% of Dynol 604, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 60 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0074] application:

[0075] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0076] In Example 6, the dispersant Joncryl HPD 296 can be replaced by NNO, D-251, Joncryl HPD 96 or MF 85A, or a mixture thereof; the surfactant Dynol 604 can be replaced by BYK 346, Dynol 607, BYK 348, Surfynol 405 or Surfynol 465, or a mixture thereof; xylitol can be replaced by mannitol, sorbitol or maltitol, or a mixture thereof; hydroxyethyl urea can be replaced by betaine, urea or sodium pyrrolidonecarboxylate, or a mixture thereof.

[0077] Example 7

[0078] A method for preparing disperse dye ink, the method comprising the following steps:

[0079] (1) 25% of disperse dye, 28% of D-251, 2.6% of BYK 348, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the balance of water were placed in a grinder, and ground at 2600 rpm using zirconium beads with a particle size of 0.3 mm for 8 h to obtain a disperse dye paste;

[0080] (2) adding 20% ​​of the disperse dye paste obtained in step (1), 40% of xylitol, 15% of urea, 1% of BYK 348, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 90 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0081] application:

[0082] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0083] In Example 7, the dispersant D-251 can be replaced by NNO, Joncryl HPD 296, Joncryl HPD 96 or MF 85A, or by any mixture thereof; the surfactant BYK 348 can be replaced by Dynol 607, BYK 346, Surfynol 405, Surfynol 465 or Dynol 604, or by any mixture thereof; xylitol can be replaced by mannitol, sorbitol or maltitol, or by any mixture thereof; urea can be replaced by betaine, hydroxyethyl urea or sodium pyrrolidonecarboxylate, or by any mixture thereof.

[0084] Comparative Example 1

[0085] A method for preparing disperse dye ink, the method comprising the following steps:

[0086] (1) 30% of disperse dye, 30% of MF 85A, 3% of Surfynol 465, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the balance of water were placed in a grinder, and ground at 2000 rpm using zirconium beads with a particle size of 0.1 mm for 5 hours to obtain a high-temperature disperse dye paste;

[0087] (2) adding 28% of the disperse dye paste obtained in step (1), 22% of diethylene glycol, 20% of ethylene glycol, 1% of Surfynol 465, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diethylene glycolamine to adjust the pH to 8-9 and the balance of water, stirring for 60 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0088] application:

[0089] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0090] Comparative Example 2

[0091] A method for preparing disperse dye ink, the method comprising the following steps:

[0092] (1) 25% of disperse dye, 25% of Joncryl HPD 96, 2.5% of Surfynol 405, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the balance of water were placed in a grinder, and ground at 2800 rpm using zirconium beads with a particle size of 0.3 mm for 7 hours to obtain a disperse dye paste;

[0093] (2) adding 10% of the disperse dye paste obtained in step (1), 50% of diethylene glycol, 1% of Surfynol 405, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 120 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0094] application:

[0095] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0096] Comparative Example 3

[0097] A method for preparing disperse dye ink, the method comprising the following steps:

[0098] (1) 30% of disperse dye, 30% of Joncryl HPD 296, 3% of BYK 348, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the balance of water were placed in a grinder, and ground at 2500 rpm using zirconium beads with a particle size of 0.2 mm for 10 hours to obtain a disperse dye paste;

[0099] (2) adding 50% of the disperse dye paste obtained in step (1), 20% of glycerol, 15% of urea, 1% of BYK 348, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 100 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0100] application:

[0101] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0102] Comparative Example 4

[0103] A method for preparing disperse dye ink, the method comprising the following steps:

[0104] (1) 28% of disperse dye, 28% of D-251, 2.5% of Dynol 607, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the remainder of water were placed in a grinder, and ground at 2200 rpm using zirconium beads with a particle size of 0.3 mm for 12 h to obtain a disperse dye paste;

[0105] (2) adding 40% of the disperse dye paste obtained in step (1), 18% of propylene glycol, 23% of ethylene glycol, 1% of Dynol 607, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 120 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain a dispersed direct injection ink;

[0106] application:

[0107] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0108] Comparative Example 5

[0109] A method for preparing disperse dye ink, the method comprising the following steps:

[0110] (1) 25% of disperse dye, 28% of NNO, 2.8% of BYK 346, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the remainder of water were placed in a grinder, and ground at 2700 rpm using zirconium beads with a particle size of 0.2 mm for 15 h to obtain a disperse dye paste;

[0111] (2) adding 38% of the disperse dye paste obtained in step (1), 20% of glycerol, 21% of sorbitol, 1% of BYK 346, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 80 minutes to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0112] application:

[0113] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0114] Comparative Example 6

[0115] A method for preparing disperse dye ink, the method comprising the following steps:

[0116] (1) 30% of disperse dye, 30% of Joncryl HPD 296, 3% of Dynol 604, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the remainder of water were placed in a grinder, and ground at 2200 rpm using zirconium beads with a particle size of 0.3 mm for 4 hours to obtain a disperse dye paste;

[0117] (2) adding 10% of the disperse dye paste obtained in step (1), 24% of ethylene glycol, 26% of mannitol, 1% of Dynol 604, 0.5% of 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9, and the balance of water, stirring for 60 min-120 min to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain disperse dye ink;

[0118] application:

[0119] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0120] Comparative Example 7

[0121] A method for preparing disperse dye ink, the method comprising the following steps:

[0122] (1) 25% of disperse dye, 28% of D-251, 2.6% of BYK 348, a suitable amount of diglycolamine adjusted to a pH of 8-9, and the remainder of water were placed in a grinder, and ground at 2600 rpm using zirconium beads with a particle size of 0.3 mm for 3 h to obtain a disperse dye paste;

[0123] (2) adding 20% ​​disperse dye paste obtained in step (1), 30% sorbitol, 10% glycerol, 1% BYK 348, 0.5% 1,2-benzisothiazolin-3-one, an appropriate amount of diglycolamine to adjust the pH to 8-9 and the balance of water by weight percentage, stirring for 60 min-120 min to mix evenly, and then filtering step by step using 1 μm and 0.45 μm filter membranes to obtain a high-temperature dispersed direct-injection ink;

[0124] application:

[0125] The prepared disperse dye ink was applied to a digital textile printing machine, and the ink floating, standby performance and printing continuous performance tests were carried out at an operating temperature of 25-35°C, an operating humidity of 65-80% and an operating temperature of 10-16°C, an operating humidity of 20-40%, respectively.

[0126] Final result:

[0127] The ink floating condition of the ink of Example 1 in the embodiment group under a high temperature and humidity environment is shown in Figure 1 As shown in the figure, after the ink is continuously printed for 20m, there is little ink drift and no ink accumulation on the nozzle surface.

[0128] The continuous printing performance of Example 1 in the Example group is shown in Figure 2 , before continuous printing Figure 2 (a), after continuous printing for 100m, Figure 2 (b) As shown in the figure, the ink is in excellent printing condition after continuous printing for 100 m.

[0129] The effect of Example 1 in the embodiment group before and after standby under humidity and low temperature humidity environment is as follows Figure 3 As shown in the figure, after moisturizing for 1 hour in a humid environment, the test strip is in a good state and has excellent standby performance; after moisturizing for 30 minutes in a low temperature and humidity environment, the test strip is in a good state and has excellent standby performance.

[0130] The above-mentioned embodiments 1-7 can prepare inks with strong adaptability to environmental changes. The inks still have excellent stability, standby performance and continuous printing performance under the condition of large temperature difference between winter and summer.

[0131] The ink floating condition of the ink in comparative example 1 in the comparative example group under the environment of high temperature and humidity is shown in Figure 4 , the test strip status after continuous printing is shown in Figure 5 As shown in the figure, after the ink is continuously printed for 10 m, the amount of ink floating is large, and ink is accumulated on the surface of the nozzle, resulting in multiple needle breakages on the printed test strip; the other comparative examples 2 to 7 have the same effect as comparative example 1.

[0132] The reason is that conventional alcohols are used in the comparative group, which have no branches or fewer branches and are greatly affected by the environment. The amount of ink floating is less in a low-temperature and humid environment, but serious in a high-temperature and humid environment. The amount of ink floating using propylene glycol is slightly less than that using diethylene glycol and ethylene glycol ink, but the amount of ink floating is still large, and the surface of the nozzle is stained with ink, affecting its continuous printing performance. On the basis of using multi-branched alcohols, adding alcohols with fewer branches will make the ink floating more serious. This is because the branches are reduced and the internal friction between molecules is insufficient.

[0133] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A disperse dye ink, characterized in that: In terms of weight percentage, it includes: The balance is water, and the additives include a pH adjuster and a bactericide.

2. The disperse dye ink according to claim 1, characterized in that: In terms of weight percentage, it includes: The balance is water, and the additives include a pH adjuster and a bactericide.

3. The disperse dye ink according to claim 1, characterized in that: The disperse dye paste is composed of disperse dye, dispersant, surfactant, pH regulator and water, and includes, by weight percentage: Disperse dyes 25%-30% Dispersant 25%-30% Surfactant 2.5%-3% pH Adjuster The balance is water.

4. The disperse dye ink according to claim 3, characterized in that: The dispersant is one or a mixture of MF 85A, Joncryl HPD 96, Joncryl HPD 296, D-251 and NNO.

5. The disperse dye ink according to claim 1 or 2, characterized in that: The polyol containing multiple branches is one or a mixture of xylitol, sorbitol, mannitol and maltitol.

6. The disperse dye ink according to claim 1 or 2, characterized in that: The moisturizing agent is an organic compound with strong hygroscopicity and water retention, and is selected from one or a mixture of hydroxyethyl urea, urea, betaine and sodium pyrrolidone carboxylate.

7. The disperse dye ink according to any one of claims 1 to 3, characterized in that: The surfactant is selected from one of Surfynol 465, Surfynol 405, BYK 348, BYK 346, Dynol 604 and Dynol 607 or a mixture of several thereof.

8. The disperse dye ink according to any one of claims 1 to 3, characterized in that: The pH regulator is diglycolamine, and the bactericide is 1,2-benzisothiazolin-3-one.

9. A method for preparing disperse dye ink, characterized in that: The following steps are involved: S1. Put 25%-30% of disperse dye, 25%-30% of dispersant, 2.5%-3% of surfactant, a suitable amount of pH regulator and water in a grinder by weight, and grind with zirconium beads to obtain disperse dye paste; S2. Stir and mix 10%-50% disperse dye paste, 20%-50% polyol, 0%-15% moisturizer, 0.5%-1% surfactant, 0.5%-2% additive and the remainder water by weight, and then filter step by step using a filter membrane to obtain disperse dye ink.

10. The method for preparing a high temperature dispersed direct jet ink according to claim 9, characterized in that: The rotation speed of step (1) is 2000rpm-2800rpm; the particle size of zirconium beads is 0.1mm-0.3mm, and the grinding time of zirconium beads is 3h-15h; the stirring time of step (2) is 60min-120min; and the filtration is performed step by step using 1μm and 0.45μm filter membranes.

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