阅读说明：本技术 数字喷墨用阳离子染料墨水组成物及印花纺织品的制法 (Cationic dye ink composition for digital ink jet and preparation method of printed textile ) 是由 林明亿 梁孟伟 曾铭章 于 2019-08-07 设计创作，主要内容包括：本发明提供一种数字喷墨用阳离子染料墨水组成物及印花纺织品的制造方法。数字喷墨用阳离子染料墨水组成物包括至少一种阳离子染料、水以及作为保湿剂的至少一种有机溶剂。(The invention provides a cationic dye ink composition for digital ink jet and a manufacturing method of printed textiles. The cationic dye ink composition for digital ink jet comprises at least one cationic dye, water and at least one organic solvent as a humectant.)

1. A cationic dye ink composition for digital ink jet comprises at least one cationic dye, water and at least one organic solvent as a humectant.

2. The cationic dye ink composition for digital inkjet according to claim 1, wherein the at least one cationic dye includes at least one dye selected from the group consisting of c.i. basic yellow 28, c.i. basic yellow 40, c.i. basic yellow 51, c.i. basic yellow 67, c.i. basic red 29, c.i. basic red 46, c.i. basic violet 11, c.i. basic violet 16, c.i. basic violet 39, c.i. basic blue 3, c.i. basic blue 41, c.i. basic blue 69, and c.i. basic blue 159.

3. The cationic dye ink composition for digital inkjet according to claim 1, wherein the at least one organic solvent is ethylene glycol, polyethylene glycol, glycerol, propylene glycol monomethyl ether, or a combination thereof.

4. The cationic dye ink composition for digital inkjet according to claim 1, wherein the weight ratio of the at least one cationic dye, the water and the at least one organic solvent is 2-15: 20-75: 5 to 40.

5. The cationic dye ink composition for digital inkjet according to claim 1, further comprising at least one of a solubilizer, a surfactant, a viscosity modifier, an antibacterial agent, an acid-base modifier, and an antifoaming agent.

6. A method of manufacturing a printed textile, comprising:

sizing a textile to form a size layer on the textile; and

the paste layer on the textile is subjected to a jet printing treatment with the cationic dye ink composition for digital inkjet according to any one of claims 1 to 5 to form an ink jet layer on the paste layer.

7. The method of manufacturing a printed textile according to claim 6, wherein the size composition used in the sizing treatment includes a thickener, at least one selected from the group consisting of guar gum, carboxymethyl cellulose, starch, gum arabic, and sodium alginate, sodium chlorate, tartaric acid, an antibacterial agent, and water.

8. The method of manufacturing a printed textile according to claim 7, wherein the content of sodium chlorate is 0.1 to 3 wt% and the content of tartaric acid is 0.1 to 3 wt% based on 100 wt% of the slurry composition.

9. A method of manufacturing a printed textile according to claim 6 or 7, further comprising post-treating the textile after the jet printing treatment, wherein the post-treatment comprises steaming, washing and drying.

10. A method of manufacturing a printed textile according to claim 6 or 7, wherein the material of the textile is acrylic fibres or cationic dyeable polyester fibres.

Technical Field

The invention relates to a cationic dye ink composition for digital ink-jet and a manufacturing method of printed textiles, in particular to a cationic dye ink composition for digital ink-jet and a manufacturing method of printed textiles, which are used when acrylic fibers and cationic dyeable polyester fibers are used as textiles.

Background

The textile printing industry belongs to the high-pollution and high-energy-consumption industry, but in the textile printing industry in recent years, a digital ink-jet printing method is gradually used, the method can save the manufacturing of a printing screen besides the pollution and energy consumption problems, save a large amount of cost and time, and particularly can obviously meet the requirements in a short time for changeable patterns and color levels, thereby being deeply valued by the printing and dyeing field.

In the prior art, for example, Shanghai color such as Dan dye chemical industry Co., Ltd provides a preparation method research of an acid ink-jet dye in Chinese patent CN 104761926A; zhengzhou Hongsheng digital science and technology limited company provides a purification process of reactive dye for ink-jet printing and research on reactive dye ink in Chinese patent CN 104479408A; the national patent CN104153222A of the science and technology development ltd of the science and technology industry, ge and america of Jiangsu, provides a direct jet inkjet printing dispersion ink and a preparation method thereof. These patents all promote the development of digital printing technology, thereby driving the maturity and large-scale of digital inkjet printing equipment.

In the textile industry, it is obvious that the market for the dye ink types used in digital jet printing only has three types, namely reactive dye ink, acid dye ink and disperse dye ink, and the dye inks are respectively and typically applied to the printing process of cellulose fibers, protein or polyamide fibers and polyester fibers. However, no digital dye ink suitable for acrylic fiber and cationic dyeable polyester fiber jet printing is available in the market at present; or the pigment type digital ink or the UV digital ink can be used for solving the problem of jet printing of acrylic fiber and cationic dyeable polyester fiber fabrics, but the hand feeling of the obtained printed fabrics is extremely poor.

The acrylic fiber can not be sprayed and printed by using common ink due to chemical composition factors, and the cationic dye ink is not only special for acrylic fiber fabrics, but also suitable for the spray printing of cationic dyeable polyester fiber fabrics. Although cation dyeable polyester fiber fabric in the market can be sprayed and printed by adopting disperse dye ink, the direct-injection disperse dye ink has color difference; the thermal sublimation type disperse dye ink can damage fabric fibers due to high transfer temperature, so that the hand feeling of the fabric is poor. On the contrary, as the cationic dye has bright color, when the cationic dye is used for digital printing, the cationic dye can obtain more bright color than the direct-injection type disperse dye ink, and the fabric fiber cannot be damaged because the post-treatment color development temperature of the fabric is low; compared with the thermal sublimation disperse dye ink, the thermal sublimation disperse dye ink has better hand feeling for paper transfer printing of the cationic dyeable polyester fiber fabric, thereby triggering the research and development motivation of the invention.

U.S. patent No. 5,271,765 discloses an aqueous cationic dye jet ink which improves the encrustation and kogation of aqueous cationic dye inks on jet heads by the addition of cationic polymers, but which can only be used on paper.

U.S. patent No. 6,136,080 discloses a cationic yellow azo dye for inkjet inks derived from the quaternization of pyrazole azoindole dyes, which provides an excellent combination of water solubility and light stability compared to the commonly commercially available cationic yellow dyes by means of the cationic quaternized charge-neutralization and deprotonation method of the prepared pyrazole azoindole dye salt, but the method is not applicable to various colors of digital inks.

JP2002265830A discloses an ink jet ink composition, wherein a cationic dye-dissolving stabilizer is added, and the components of the stabilizer comprise alkoxylated benzyl alcohol with different polymerization degrees or a phenol nonionic surfactant combination, so that a stable cationic dye ink can be obtained, and the cationic dye ink is prevented from being precipitated due to aggregation when stored for a long time, thereby realizing the stable ink jet ink. However, since the aggregation and precipitation of each cationic dye in different cationic dye inks are different due to different pH values, temperature changes or oil solubility or water solubility, and the aggregation and precipitation degree of each cationic dye is also different, different kinds of soluble stabilizer compounds and additive amounts are required to adapt to different HLB values to avoid aggregation and precipitation of the dyes, and thus the effect of the soluble stabilizer used in the patent is still to be studied.

Chinese patents CN1276036C and CN1511897A disclose a cationic dye digital printing ink and a digital printing method thereof. The dye system in the ink composition uses cationic dye as raw material, and comprises: c.i. basic yellow 2 (basic bright yellow O), c.i. basic orange 29 (asterchon yellow GL-E), c.i. basic red 1 (basic rose essence 6GDN), c.i. basic violet 10 (basic rose essence B), asterchon red F3BL, c.i. basic blue (cationic turquoise blue GB), asterchon blue FGRL, cationic black RL (dye blend) or asterchon black SW. The dye purification method comprises the steps of dissolving the dye by using an organic solvent, filtering impurities, and evaporating the solvent in the dye solution. The purified dye is added with wetting agent, solubilizer, preservative, water and the like to prepare the ink. Then, the pretreated textile is subjected to digital jet printing, and the jet printed textile is subjected to post-treatment to obtain a printed product. The patent mainly discusses that when the printed fabric is acrylic fiber and cationic dyeable polyester, the first step of the textile needs to be pretreated and then spray-printed, but the tested cationic dyes are obtained by dissolving dyes in general organic solvents, filtering impurities, and then evaporating the solvents, so that the prepared ink has very poor storage stability (color concentration), washing fastness and sunlight fastness, and cannot meet the requirements of general digital ink in the market.

In addition, most commercially available cationic dyes have relatively low solubility in water, and therefore, it is necessary to reduce the pH of the ink to about 2 to 4, so that the solubility can be significantly improved. However, the head of the inkjet printing apparatus is easily damaged by corrosion of metal parts in an acidic environment. Therefore, in order to prepare the cationic dye into the ink with good storage stability and high color density, the water solubility of the cationic dye in a neutral environment needs to be improved.

Disclosure of Invention

The invention provides a cationic dye ink composition for digital ink jet and a manufacturing method of a printed textile, which can be applied to the spray printing of acrylic fiber and cationic dyeable polyester fiber textiles and can obtain the printed textile with good comprehensive performances such as washing fastness, sunlight fastness, rubbing fastness, perspiration fastness and the like.

The invention provides a cationic dye ink composition for digital ink jet, which comprises at least one cationic dye, water and at least one organic solvent as a humectant.

In an embodiment of the present invention, the at least one cationic dye includes at least one dye selected from the group consisting of c.i. basic yellow 28, c.i. basic yellow 40, c.i. basic yellow 51, c.i. basic yellow 67, c.i. basic red 29, c.i. basic red 46, c.i. basic violet 11, c.i. basic violet 16, c.i. basic violet 39, c.i. basic blue 3, c.i. basic blue 41, c.i. basic blue 69, and c.i. basic blue 159.

In an embodiment of the invention, the at least one organic solvent is ethylene glycol, polyethylene glycol, glycerol, propylene glycol monomethyl ether, or a combination thereof.

In an embodiment of the present invention, the weight ratio of the at least one cationic dye, the water and the at least one organic solvent is 2-15: 20-75: 5 to 40.

In an embodiment of the invention, the cationic dye ink composition for digital inkjet further includes at least one of a solubilizer, a surfactant, a viscosity modifier, an antibacterial agent, an acid-base modifier, and an antifoaming agent.

The invention also provides a manufacturing method of the printed textile, which comprises the following steps: sizing the textile to form a size layer on the textile; and carrying out jet printing treatment on the sizing agent layer on the textile by using the cationic dye ink composition for digital ink jet so as to form an ink jet layer on the sizing agent layer.

In an embodiment of the invention, the slurry composition used in the sizing process includes a thickener, sodium chlorate, tartaric acid, an antibacterial agent and water. The thickener is at least one selected from the group consisting of guar gum, carboxymethyl cellulose, starch, gum arabic, and sodium alginate.

In one embodiment of the present invention, the slurry composition contains 0.1 wt% to 3 wt% of sodium chlorate and 0.1 wt% to 3 wt% of tartaric acid, based on 100 wt% of the slurry composition.

In an embodiment of the invention, the manufacturing method of the printed textile further includes performing a post-treatment on the textile after the jet printing treatment, wherein the post-treatment includes steaming, washing and drying.

In an embodiment of the invention, the textile is made of acrylic fiber or cationic dyeable polyester fiber.

Based on the above, when the cationic dye ink composition for digital ink-jet printing is sprayed and printed on acrylic fibers or cationic dyeable polyester fibers, the fibers and the cationic dye have high combination stability, so that the printed textiles have good comprehensive properties such as washing fastness, sunlight fastness, rubbing color fastness, perspiration color fastness and the like. In addition, the post-treatment process is mild due to the use of the cationic dye ink composition for digital ink-jet, and the prepared printed textiles are bright in color and excellent in hand feeling.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Detailed Description

The invention provides a cationic dye ink composition for digital ink jet, which comprises at least one cationic dye (A), water (B) and at least one organic solvent as a humectant (C). In addition, if necessary, the cationic dye ink composition for digital inkjet (hereinafter, simply referred to as "ink composition" or "ink") may further include at least one of a solubilizer (D), a surfactant (E), a viscosity modifier (F), an antibacterial agent (G), an acid-base modifier (H), and an antifoaming agent (I) as an additive.

In one embodiment, to meet the requirements of textile ink jet printing. The ink composition has a viscosity of between 1.5 to 15cps at 25 ℃, has a surface tension of between 20 to 40dyne/cm, and has a pH of 6.0 to 7.0.

Cationic dye (A)

The dye used in the ink composition is a cationic dye having an amine salt residue or a quaternary ammonium group, such as an azo dye, a triphenylmethane dye, an azine dye, an oxazine dye, a thiazine dye, a polymethine cyanine dye, or a combination thereof. The cationic dye (a) preferably includes at least one dye selected from the group consisting of c.i. basic yellow 28, c.i. basic yellow 40, c.i. basic yellow 51, c.i. basic yellow 67, c.i. basic red 29, c.i. basic red 46, c.i. basic violet 11, c.i. basic violet 16, c.i. basic violet 39, c.i. basic blue 3, c.i. basic blue 41, c.i. basic blue 69 and c.i. basic blue 159. These dyes have never been used in the inkjet printing technology of textiles before, and have never been used in digital dye inks for acrylic fibers and cationic dyeable polyester fiber fabrics. Therefore, the application of the dyes in the inkjet printing technology of textiles is obviously not disclosed in the prior art for the first time.

Examples of the inorganic anion bonded to the cationic dye include chloride ion, bromide ion, nitrate ion, dihydrogen phosphate ion, methyl sulfate ion, ethyl sulfate ion, acetate ion, lactate ion, and trichlorozincate ion.

The content of the cationic dye (a) is 2 to 15% by weight, preferably 3 to 10% by weight, based on 100% by weight of the ink composition.

Water (B)

The water (B) is not limited to containing a large amount of ions, and distilled water, deionized water, ultrapure water, or a combination thereof can be mentioned.

The content of the water (B) is 20 to 75% by weight based on 100% by weight of the ink composition.

Humectant (C)

The humectant (C) primarily aids in the wetting of the digital printer printhead and prevents the ink from drying out or scaling in the orifices of the jet. When the ink composition does not contain the humectant (C), the head of the digital printer head may be clogged, which is disadvantageous to the operation and may cause damage to the digital printer.

The humectant (C) is an organic solvent. Specifically, the humectant (C) is a polyhydric alcohol, an alkyl mono-or diether derived from an alkylene glycol, a nitrogen-containing cyclic compound, or a combination thereof. The polyol is an alcohol having a plurality of hydroxyl groups. Examples of the polyhydric alcohol include ethylene glycol, diethylene glycol (diethylene glycol), triethylene glycol (triethylene glycol), tetraethylene glycol (tetraethylene glycol), polyethylene glycol, 1, 2-propylene glycol, glycerol (glycerin), and a combination thereof. Alkyl mono-or diethers derived from alkylene glycols, there may be enumerated ethylene glycol monomethyl or monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, propylene glycol monomethyl ether, monoethyl ether, or combinations thereof. Examples of the nitrogen-containing cyclic compound include pyrrolidone, N-methyl-2-pyrrolidone, 1, 3-dimethyl-2-imidazolidinone, and a combination thereof. The above-listed humectants may be used singly or in combination of plural kinds. The humectant (C) in the ink composition of the present invention is preferably ethylene glycol, polyethylene glycol, glycerin, propylene glycol monomethyl ether, or a combination thereof.

The content of the humectant (C) is 5 to 40% by weight based on 100% by weight of the ink composition.

Solubilizer (D)

The solubilizer (D) is an organic solvent which can be mixed with water and is added into the ink composition of the invention to help the stability of the ink. The solubilizer (D) is a monohydric alcohol, ketone, ether, ester or combination thereof with one hydroxyl group. Examples of the unit alcohol include methanol, ethanol, n-propanol, isopropanol, n-butanol, and isobutanol. The ketones include acetone and methyl ethyl ketone. Examples of ethers include tetrahydrofuran and morpholine. The esters include ethyl acetate and ethyl lactate. The above-listed solubilizing agents (D) may be used alone or in combination of two or more.

The content of the solubilizer (D) is 1 to 20% by weight based on 100% by weight of the ink composition.

Surfactant (E)

The surfactant (E) is added to adjust the surface tension of the ink to an appropriate level. More specifically, the surface tension of the ink composition is preferably 20dyne/cm to 40 dyne/cm. The surfactant can be a cationic surfactant, an amphoteric surfactant, a nonionic surfactant, or a combination thereof. The preferred surfactant for the ink composition of the present invention is an acetylenic diol ethoxy derivative. Specific examples thereof include commercially available Surfynol 465.

The content of the surfactant (E) is 0.1 to 3% by weight based on 100% by weight of the ink composition.

Viscosity modifier (F)

The viscosity modifier (F) can adjust the viscosity of the ink to an appropriate level. More specifically, the viscosity of the ink composition at 25 ℃ is preferably 1.5cps to 15 cps. Examples of the viscosity modifier (F) include polyethylene glycol 200(PEG200), polyethylene glycol 1000(PEG1000), Xanthan gum (Xanthan gum), carboxymethyl cellulose (CMC), polyvinyl pyrrolidone (PVP), hydroxyethyl cellulose (HEC), Guar gum (Guar gum), starch, sodium alginate, and a combination thereof.

The content of the viscosity modifier (F) is 0.1 to 20% by weight when calculated as 100% by weight based on the ink composition.

Antibacterial agent (G)

The antibacterial agent (G) is an antiseptic agent that inhibits growth of microorganisms such as mold, fungus, and the like in the ink to ensure that the ink composition does not go moldy from the time of completion of the manufacture to the time of use. As the antibacterial agent (G), 1,2-Benzisothiazolin-3-one (1, 2-beziosothiazolin-3-one) is exemplified.

The content of the antibiotic agent (G) is 0 to 0.5% by weight based on 100% by weight of the ink composition.

Acid-base regulator (H)

The pH of the ink composition of the present invention may be 5.5 to 7.5, preferably 6.5 to 7.0. In addition, the pH of the ink composition of the present invention can be adjusted by an acid-base modifier (H), wherein the acid-base modifier (H) can be an organic acid, an organic base, an inorganic acid, an inorganic base, or a combination thereof.

Typical organic acids include formic acid, acetic acid, and the like. Typical organic bases include ammonia, triethanolamine, or the like. Typical examples of the inorganic acid include hydrochloric acid, phosphoric acid, sulfuric acid, and the like. Typical inorganic bases include alkali metal hydroxides, carbonates, or the like. The acid-base adjusting agents (H) listed above may be used alone or in combination of plural kinds.

The content of the acid-base modifier (H) is 0.1 to 1% by weight based on 100% by weight of the ink composition.

Defoaming agent (I)

The defoaming agent (I) can prevent the ink from generating foam when moving and using, and influences the operation of printing and jet printing equipment and the jet printing quality. As the defoaming agent (I), polysiloxane, alcohol, ether, polyether, or a combination thereof can be exemplified. Specific examples of the defoaming agent (I) include ethanol, Surfynol 465, propylene glycol methyl ether, and combinations thereof.

The content of the antifoaming agent (I) is 0 to 5% by weight based on 100% by weight of the ink composition.

< pretreatment of dye >

Because the water solubility of the cationic dye is obviously influenced by inorganic salt ions in the dye, the cationic dye is treated by using a modular filtration technology (namely, an RO (reverse osmosis) method). Specifically, a proper amount of pure water is added into a filter cake or raw powder of a self-made or commercially available high-concentration cationic dye to prepare a dye solution, wherein the raw powder is the dye obtained by drying a wet filter cake obtained by carrying out synthetic salting-out and pressure filtration on the cationic dye. And then, adjusting the pH value of the dye solution to a certain value by using an acid-base regulator, heating and stirring the dye solution, and then cooling the dye solution to the room temperature. Then, the dye solution was filtered with a 5 μm polypropylene filter, and then with a1 μm polypropylene filter, and the inorganic salt was dialyzed against the filtered dye solution with a Nanofiltration (NF) membrane in a circulating manner. When the ion content in the dye solution is monitored to be reduced to the standard, the dye solution is concentrated, so that the content of inorganic salts in the dye color paste can be effectively reduced, and the dye color paste is filtered by a polyvinylidene fluoride membrane with the diameter of 0.45 mu m, so that the dye color paste (namely the cationic dye (A)) used for the ink can be prepared.

It is worth noting that the ink composition is prepared by using the low-salt cationic dye color paste, so that the prepared ink composition has good storage stability, and acrylic fibers and cationic dyeable polyester fiber printed textiles prepared by using the ink composition have bright colors and excellent hand feeling.

< preparation of ink composition >

First, the respective components in the ink composition are uniformly mixed to obtain a dye solution. Note that the order of addition of the respective components is not particularly limited as long as uniform mixing is possible. Then, the dye solution was filtered with a 5 μm polypropylene filter, then with a1 μm polypropylene filter, and then the filtered dye solution was filtered with a 0.45 μm polyvinylidene fluoride membrane to prepare an ink composition.

< method for producing printed textile >

Specifically, the manufacturing method of the printed textile comprises (i) sizing treatment, and (ii) spray printing treatment and (iii) post-treatment in sequence. The individual steps are detailed below:

(ii) sizing treatment in step (i)

The textile is sized to form a size layer on the textile, wherein the size layer is formed from the size composition.

The sizing treatment method is not particularly limited, but it is preferable to use a press-suction sizing method in which the press-suction weight is about 2Kg/cm²And pressing and sucking, and drying to finish sizing.

The slurry composition comprises a thickening agent, sodium chlorate, tartaric acid, an antibacterial agent and water. The thickener is at least one selected from the group consisting of guar gum, carboxymethyl cellulose, starch, gum arabic, and sodium alginate. Sodium chlorate was used to protect cationic dyes. Tartaric acid is used as an acid releasing agent.

In one embodiment, the slurry composition comprises 1 to 5 wt% guar gum, 0.1 to 3 wt% sodium chlorate, 0.1 to 3 wt% tartaric acid, less than 0.1 wt% antimicrobial, and the balance water. In this case, the viscosity of the slurry composition is about 8000cps, and the pH is 2 to 4.

Step (ii) spray printing treatment

And carrying out jet printing treatment on the sizing agent layer on the textile by using the cationic dye ink composition for digital ink jet so as to form an ink jet layer on the sizing agent layer. The inkjet printing process is, for example, a pattern inkjet printing process. Specifically, the ink composition is filled in a digital printing machine, matched with a control program of raster image processing software (RIP), and CMYK color ink is used for carrying out jet printing treatment on a slurry layer of the textile, and finally, a pattern (jet ink layer) with bright color is printed on the textile.

The digital printer is not particularly limited, and is preferably a piezoelectric digital printer, such as MUTOH RJ-900C manufactured by Wu Teng, and employs EPSON DX-5 nozzles and a four color separation ink cartridge (filled with CMYK color ink).

Step (iii) post-treatment

After the jet printing treatment, the printed textile needs to be subjected to post-treatment, so that good color development can be obtained. In detail, the post-treatment includes steaming, washing with water, and drying. The steaming conditions of different textiles are different, and specifically, the steaming conditions of the acrylic fibers are at 102 ℃ for 37 minutes. The steaming condition of the cation dyeable polyester fiber is at 120 ℃ for 26 minutes. After steaming, the textile is treated with Na₂S₂O₄Washing with 0.5g/L cold water, washing with 2g/L soaping agent and hot water at 70-80 deg.C for 3-5 min, dewatering, oven drying or air drying, and leveling.

The ink composition can improve the solubility of the commercial cationic dye, thereby improving the color density of the color developed after the ink is sprayed and printed on the textile, which is equivalent to the color density of the color developed after the commercial acid dye ink is sprayed and printed on nylon cloth, has excellent coloring strength and is not easy to precipitate, and further provides good storage stability and printing and dyeing stability.

In addition, when the ink composition is sprayed and printed on acrylic fiber or cationic dyeable polyester fiber textiles, the fibers and the dye have high combination stability, so that the printed textiles have good comprehensive performances such as washing fastness, sunlight fastness, rubbing fastness, perspiration fastness and the like.

The invention will be further described in the following examples, which are to be construed as merely illustrative, and not limitative of the remainder of the disclosure in any way whatsoever.

Specifically, the examples hereinafter include four parts of pretreatment of the dye (preparation of dye paste), preparation of the ink composition, a manufacturing method of the printed textile, and evaluation of the printed textile.

[ pretreatment of dye ]

Hereinafter, the RO method is taken as an example, and the solvent extraction method is taken as a comparative example.