CN109627848B

CN109627848B - Functional ink and printing method thereof

Info

Publication number: CN109627848B
Application number: CN201811504977.1A
Authority: CN
Inventors: 秦国胜; 张轶红
Original assignee: Hongsam Digital Science & Technology Co ltd
Current assignee: Hongsam Digital Science & Technology Co ltd
Priority date: 2018-12-10
Filing date: 2018-12-10
Publication date: 2022-01-25
Anticipated expiration: 2038-12-10
Also published as: CN109627848A

Abstract

The invention discloses functional ink which is prepared from the following components in percentage by weight: humectant: 5% -40%, viscosity modifier: 0.1% -5%, surfactant: 0.1% -10%, pH regulator: 0.1% -5%, complexing agent: 0.1% -5%, bactericide: 0.1% -2%, functional auxiliary agent: 0.1% -30%, water: the rest is; the functional auxiliary agent is one or more of a quick color developing agent, a fastness improving agent, a penetrating agent, a softening agent, an antistatic agent, an anti-stiffening finishing agent, an antibacterial finishing agent and a waterproof finishing agent. In addition, the invention also discloses a printing method of the functional ink, which comprises the following steps of 1) pre-printing on a printing medium by using the functional ink before the ink-jet ink is subjected to ink-jet printing; 2) after the inkjet printing of the inkjet ink on the printing medium is finished, post-printing on the printing medium by using the functional ink; and 3) printing on the printing medium simultaneously with the inkjet ink using the functional ink.

Description

Functional ink and printing method thereof

Technical Field

The invention relates to functional ink for ink-jet printing, in particular to functional ink which can be matched with various ink-jet inks to realize excellent printing effect on various printing media.

Background

At present, the ink-jet printing technology is widely applied to a plurality of fields such as building decoration material printing, textile printing, packaging decoration material printing and the like. Which is to print different types of inkjet inks onto corresponding print media by an inkjet printer to form a desired print pattern. Due to the diversity of printing media, especially for some printing media without ink-absorbing coatings or printing media unsuitable for certain inkjet inks, especially in the field of textiles, the printing media usually needs to be pretreated before inkjet printing, and a pretreatment agent is applied to the printing media in a spraying, roll coating, padding, blade coating and other modes so as to solve the problems of permeability, definition, leveling property, reactivity and the like required after the ink is sprayed onto the printing media. After the inkjet printing is finished, the printed medium may need to be subjected to after-finishing as needed, and an after-treatment agent is applied to the surface of the printed medium by spraying, roll coating, padding, blade coating and the like, so that the printed medium meets the quality requirements of color fastness, glossiness and the like.

In the prior art, the pre-processing, the inkjet printing and the post-processing are generally performed separately, that is, the pre-processing and the post-processing are performed on the medium before printing and the medium after printing respectively in the above manner, and the inkjet printing is performed by using an inkjet printer in the inkjet printing link. This not only increases the complicated processing procedures, but also causes the inability to precisely pre-process and/or post-process the print medium, failing to achieve satisfactory printing results; but also has the problem of waste of treating agent and environmental problems caused thereby.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide functional ink which can assist various ink-jet inks to realize excellent printing effect on various printing media according to requirements. In addition, another object of the present invention is to provide a printing method of the functional ink.

In order to achieve the purpose, the invention adopts the following technical scheme:

according to one aspect of the present invention, there is provided a functional ink, which is made of, in weight percent: humectant: 5% -40%, viscosity modifier: 0.1% -5%, surfactant: 0.1% -10%, pH regulator: 0.1% -5%, complexing agent: 0.1% -5%, bactericide: 0.1% -2%, functional auxiliary agent: 0.1% -30%, water: the balance being.

Wherein the humectant is a high boiling point, non-volatile agent for keeping the spray head wet to avoid clogging, and specifically, in the present invention, the humectant includes but is not limited to: one or more of polyalcohol, alcohol amine, alcohol ether, amide, polyalcohol, polyether, 2-pyrrolidone, pyrrolidone carboxylic acid, lactate, amine, uric acid, glucosamine, citrate, sodium, potassium, calcium, magnesium phosphate, chlorine, sugar, organic acid, peptide and other humectant. Preferably, the humectant is one or more of glycerol, 1, 2-propylene glycol, 1, 3-propylene glycol, diethylene glycol, dipropylene glycol, 1, 5-pentanediol, butylene glycol, polyethylene glycol, 1, 2-hexanediol, diethylene glycol monobutyl ether, xylitol, polypropylene glycol, sodium sorbitol lactate, urea, N-methylpyrrolidone, 2-pyrrolidone, urea, polyamines, ethers and polyethers, polyols, and polyglycols.

The viscosity regulator is used for regulating the viscosity of the ink to meet the requirement of a spray head, and specifically, in the invention, the viscosity regulator can be one or more of high molecular polymers such as polyhydric alcohol, alcohol ether, long-chain fatty alcohol, polymeric polyhydric alcohol, ester and polyester, ether and polyether, amide and polyamide and salts thereof, polyacrylic acids, polyurethane dispersions and emulsions, natural thickeners such as sodium alginate, etherified starch, guar gum, methyl cellulose, carboxymethyl cellulose, polyvinylpyrrolidone K40, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, middle molecular alcohol ether, high molecular alcohol ether, PVA, PVC, PE, PET, PVP and the like.

The surfactant can be one or more of cationic surfactant, nonionic surfactant, anionic surfactant and amphoteric surfactant, and the surfactant can be natural, such as phospholipid, choline, protein, etc., or chemically synthesized, such as carboxylic acid, sulfonic acid, sulfuric acid, phosphoric acid, hydroxyl, amide group, ether bond, amino or amine group with nonpolar hydrocarbon chain and its salt, or alcohol, ether, lipid substance and organic salt and poly salt. Specifically, in the present invention, the surfactant includes, but is not limited to, one or more of sodium dodecyl sulfate, sodium linear alkyl benzene sulfonate (LAS), sodium fatty alcohol polyoxyethylene ether sulfate (AES), ammonium fatty alcohol polyoxyethylene ether sulfate (AESA), sodium lauryl sulfate (K12 or SDS), lauroyl glutamic acid, nonylphenol polyoxyethylene ether (TX-10), peregal O, diethanolamide (6501), glycerol monostearate, lignosulfonate, dialkylbenzenesulfonate, alkylsulfonate (petroleum sulfonate), diffuser NNO, diffuser MF, alkyl polyether (PO-EO copolymer), fatty alcohol polyoxyethylene ether (AEO-3), acetylenediol surfactants such as S-465 of the air chemical industry, silicone surfactants, and organic fluorine surfactants, to adjust the surface tension of the functional ink to 20-60mN/m, preferably to 24-35 mN/m.

The pH regulator can provide a good pH environment for the stability of the functional ink on one hand and can also provide a pH environment required for the post-printing treatment of the ink on the other hand. In the present invention, the pH adjusting agent may be an inorganic acid-base salt, an organic acid-base salt, or a substance that exhibits acidity or alkalinity in water or other solvents, or an acid-base environment that is suitable for a reaction in a subsequent steaming or baking process by decomposing an acidic or alkaline substance in the subsequent steaming or baking process. For example, under the steaming condition of 100 ℃, the ammonium sulfate substances can release acidic substances, further reduce the pH value of the surface of the medium, and provide an environment suitable for combining with fibers such as nylon and the like for the acidic dye; and the sodium bicarbonate can provide a slightly alkaline environment under the steaming condition of 100 ℃, and is suitable for dyeing cotton fibers by using reactive dyes. Therefore, the pH regulator not only can ensure the stability and the jettability of the functional ink before printing, but also can provide a required pH environment for subsequent ink-jet printing and post-treatment. Specifically, the pH regulator may be one or more of acetic acid, sodium hydroxide, citric acid, ammonium hydroxide, ammonium citrate, poly organic amine, ammonium acetate, ammonium sulfate, urea, sodium carbonate, sodium bicarbonate, sodium phosphate, and sodium salt of fatty alcohol ether sulfonate.

The complexing agent is used for complexing high-valence metal salt ions and other inorganic impurities which may be present in the ink-jet ink, and can also promote the interaction between the functional ink and other ink-jet inks and printing media. Specifically, in the present invention, the complexing agent may be hydroxide, citrate, pyrophosphate, thiosulfate, sulfite, ammonium phosphate, phosphates such as sodium tripolyphosphate, sodium pyrophosphate, sodium hexametaphosphate; alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, etc.; aminocarboxylates such as one or more of sodium aminotriacetate (NTA), ethylenediaminetetraacetate (disodium or tetrasodium EDTA), diethyltriaminepentaacetic acid (DTPA), hydroxycarboxylates, organophosphates, acrylic chelating agents.

The bactericide is one or more of sodium benzoate, potassium sorbate, sodium dehydroacetate, calcium propionate, sodium diacetate, sodium lactate, propyl p-hydroxybenzoate, nisin, hydrogen peroxide, chlorophenols, isothiazolinone and quaternary ammonium salt bactericide.

The water is deionized water, and the conductivity of the deionized water is preferably less than 10000us/cm, more preferably less than 2000us/cm, and even more preferably less than 300 us/cm.

In the invention, the functional auxiliary agent can be one or more of a quick color developing agent, a fastness improving agent, a penetrating agent, a softening agent, an antistatic agent, a stiffening finishing agent, an antibacterial finishing agent and a waterproof finishing agent, and the weight percentage composition of the functional auxiliary agent is preferably 5-25%, and more preferably 10-20%.

The quick color developing agent can be resin, high molecular polymer, cationic, nonionic, anionic and zwitterionic high molecular polymer and surfactant, and can also be inorganic acid, inorganic base, inorganic salt or a mixture thereof. The substance may be a solid or liquid substance, may be soluble, or may be a substance dispersible in a solvent. In particular, the invention preferably adopts cationic amine salt type, quaternary ammonium salt type, heterocyclic type and other compounds, which can have different polymerization degrees, such as cetyl pyridinium chloride, cetyl pyridinium bromide, polymeric ammonium salt type substances; amine aldehyde resin type dicyandiamide formaldehyde primary condensate and polyamine condensate; a phenolic condensate; a cross-linking fixing agent; reactive dye fixing agent KS, phenol sulfonic acid formaldehyde condensation compound used on nylon fabric, metal salt such as magnesium sulfate and the like. It is also possible to use polyacrylamide-based high molecular compounds, whether anionic cationic or nonionic, which may have different functional effects on the printing result. Polyacrylic resin, polyurethane resin, organic silicon resin, fluorocarbon resin and other substances capable of obviously improving the fastness and the glossiness of the ink can also be used. Depending on the ink and medium used for printing, it is also possible to use a cationic polymer having: na (Na)⁺、K⁺、NH₄ ⁺、Mg²⁺、Ca² ⁺、Ba²⁺、Al³⁺、Fe²⁺、Fe³⁺、Zn²⁺、Cu²⁺、Ag⁺Organic and substance salts of the plasma are used as color fixing agents.

The fastness improving agent is used for acting with other ink-jet ink to obtain better printing fastness. Specifically, the fastness improver can be a high molecular polymer capable of being tightly combined with the printing medium, such as one or more of aqueous acrylic resin, aqueous polyurethane resin, aqueous fluorocarbon resin, polyacrylamide, ammonium salt such as dodecyl dimethyl benzyl ammonium chloride, fatty alcohol ether and metal salt.

The penetrant may be used to assist in enhancing the penetration of other inkjet inks onto the print medium. Specifically, the penetrant may be non-ionic such as penetrant JFC, peregal O, etc.; the anion comprises rapid penetrant T, alkali-resistant penetrant OEP-70, alkali-resistant penetrant AEP and the like. Organic solvents or inorganic salts may also be added to reduce surface tension, such as polyols, polyethers and lipids, preferably fatty alcohol-polyoxyethylene ether penetrants.

The softening agent can assist the functional ink to complete the spraying function without blocking a spray head, and can also complete the softening after-finishing function of printing media such as fabrics. Specifically, in the present invention, the softening agent may be a sulfate, a sulfonate-based surfactant, a fatty acid polyol ester, a pentaerythritol fatty acid ester, a glycerol mono fatty acid ester, a sorbitan fatty acid ester, or the like; the softening agent also comprises alkanolamide, polyoxyethylene fatty amide, fatty acid diethanolamide, polyethers, quaternary ammonium salts, chitosan, polyammonium salts and various organic amines. The polymer can also be one or more of high molecular polymer softening agent, such as polyethylene wax, organosilicon polymer, such as aqueous organosilicon oil EASYSOFT AEE (Shanghai extraction and refinement chemical Co., Ltd.), amino modified polysiloxane, acid anhydride derivatives, acid anhydride or ketene, pyridine quaternary ammonium salt derivatives, stearamide methylene pyridine chloride, epoxy derivatives, and distearamide ethyl epoxy propyl ammonium chloride with epoxy group.

The antistatic agent can prevent printing media such as chemical fibers, cotton fabrics and plastic films from generating static electricity in ink-jet printing and subsequent use. Specifically, the antistatic agent may be a cationic antistatic agent such as chlorine, bromide of alkyl quaternary ammonium, phosphorus or phosphonium salts; alkali metal salts of anions such as alkylsulfonates, phosphates or dithiocarbamates; non-physical antistatic agents are one or more of ethoxylated fatty alkylamines, ethoxylated alkyl acid amines, such as ethoxylated lauramide, and glycerol stearate.

The stiffening finishing agent can impart a resilient stiffening effect to the print medium, for example, it can make the wool-like effect of the textile stronger, more elastic, and can be easy to wash without ironing. Specifically, the stiffening finishing agent can be one or more of polycyanum amide resin, urea-formaldehyde resin, polyacrylate, polyvinyl acetate and copolymer thereof, melamine-formaldehyde resin, polyvinyl alcohol, reactive adipic acid resin such as three-in-one easy-care stiffening resin YT-808 in chemical engineering of Jinan Tao, polyester or starch and derivatives thereof.

The antibacterial finishing agent has the effects of sterilizing and inhibiting the generation of the antibacterial finishing agent. Specifically, the antibacterial finishing agent can be various complex compounds of elements such as nitrogen, sulfur, chlorine and the like, and the main varieties of the antibacterial finishing agent are as follows: quaternary ammonium salts, biguanides, alcohols, phenols, aldehydes, organic metals, pyridines, thiophenes, and the like. The cationic nitrogen-containing compound has obvious inhibiting and sterilizing effects on bacteria, such as cationic benzalkonium "1227", benzalkonium bromide, etc., and inorganic nano antibacterial agents, mainly salts of metal ions such as Ag, Co, Ni, Al, Ti, Zn, Cu, Fe, Mn, Sn, Ba, Mg, Ca, etc. Such as nano zinc oxide, nano titanium oxide, nano aluminum oxide and salts containing silver ions. Natural antibacterial agent such as water soluble chitosan quaternary ammonium salt can also be added.

The waterproof finishing agent can endow printing media with functions of water resistance, stain resistance, adhesion resistance, moisture absorption, sweat releasing and the like, and endows printing media such as fabrics and the like with extreme surface tension through crosslinking after printing is finished, so that moisture is easy to condense and drip outside the printing media, and meanwhile, the permeability of the printing media to air can be kept. Specifically, the waterproof finishing agent includes, but is not limited to, "aluminum acetate + paraffin soap emulsion", metal ion complexes of fatty acid and chromium, titanium, aluminum and the like, reaction products of stearic acid and amino resin primary condensate, paraffin emulsion mixture, hydroxymethyl cellulose or self-polycondensate, organic silicon high polymer such as linear polysiloxane emulsion, or amino silicone oil, polyether modified fluorocarbon resin containing a fluorocarbon structure, fluorine-containing alkyl acrylate copolymer, fluorine-containing acrylate emulsion and the like.

According to another aspect of the present invention, there is provided a method for preparing the functional ink as described above, comprising the steps of: the functional ink is obtained by mixing and stirring the components uniformly according to the weight percentage and filtering.

According to still another aspect of the present invention, there is provided a printing method of the functional ink as described above, including: 1) pre-printing on a printing medium by using the functional ink before the inkjet printing is carried out on the inkjet ink; 2) after the inkjet printing of the inkjet ink on the printing medium is finished, post-printing on the printing medium by using the functional ink; and 3) printing on the printing medium simultaneously with the inkjet ink using the functional ink.

Specifically, the functional ink of the present invention may be used in any stage of inkjet printing, for example, at least one stage before, during, and after printing the inkjet ink, and an inkjet printer for printing the functional ink may separately and repeatedly use the same functional ink, or may simultaneously use functional inks having different functions. In addition, the functional ink printing system suitable for the invention can be realized by respectively installing functional inks with different functions in different printing channels of the same printing head; or a plurality of printing heads can be adopted, and each printing head is respectively provided with functional ink; or, a plurality of groups of nozzles can be adopted, and each group of nozzles is respectively provided with functional ink with a certain function; alternatively, the entire printer or all channels of the print module may be filled with one type of functional ink, and the printer and the print module may be combined. In summary, the printing of the functional ink of the present invention can be achieved by selecting at least one, preferably a combination of at least two, of the head passage, the number of heads, the head group, the number of printers, and the print module group.

According to a preferred embodiment of the present invention, a printing system can be formed by connecting a plurality of printers in series, that is, different printing channels of one nozzle, at least one nozzle in N nozzle combinations, at least one group of N groups of nozzles, or at least one printing unit in N printing units of N printers in series in the moving direction of a printing medium, so as to continuously eject ink and process the printing medium, wherein N is preferably greater than or equal to 2, and the printer can be a photo printer, a tape guide, a flat-plate printer, or other printer capable of independent printing.

For example, FIG. 1 shows a printing system including 5 printers or print modules (P01-P05) that can be separately loaded with functional or inkjet inks having different functions to accomplish desired printing requirements. According to the invention, for example, functional ink with the function of a pretreatment agent can be installed in P01, disperse dye ink can be installed in P02, and printing media, such as polyester fabric, can sequentially pass through P01 and P02 according to the moving direction of the media in the figure, so that the printing of the polyester fabric without pretreatment can be completed. Alternatively, printing of various types of textiles without a pre-sizing treatment can be accomplished by installing a functional ink having an aqueous pigment pre-treatment function in P01 and then installing an aqueous pigment ink in P02. Still alternatively, a functional ink having an aqueous pigment pretreatment function may be installed in P01, an aqueous pigment ink may be installed in P02, and a functional ink having improved color fastness may be installed in P03, so that not only various types of textile printing without a sizing pretreatment but also improved printing color fastness can be realized. For another example, when printing a colored medium, such as a cloth with a ground color, a functional ink with the function of an aqueous white pigment pretreatment liquid can be installed in P01, a white inkjet ink can be installed in P02, and an aqueous pigment colored ink can be installed in P03, so that the ground color can be covered by the white ink during printing, and the colored ink can be printed on the white ink, thereby completing inkjet printing of a colored fabric. Generally, the white ink printing needs to be preprocessed in advance, and the preprocessing process before the white ink printing is additionally carried out is omitted by adopting the printing method, so that the whole process is very convenient. In addition to the above printing, functional ink having a stiffening finishing function, functional ink having an antistatic property, and the like may be further installed in P04 and P05, so as to respectively perform stiffening treatment, antistatic treatment, and the like on the above printing medium, so as to realize more printing functions at one time.

Particularly, because the invention adopts the digital printing nozzle to perform functional printing, the ink jet amount can be flexibly controlled according to the requirement through the software setting of the printer, the nozzle can jet ink according to the requirement, and the ink can be jetted according to the requirement, the ink can be jetted according to the functional requirement, and the ink can be jetted according to the quantity and the position, thereby more simply and digitally controlling the printing quality. Moreover, by adopting digital control software, partial spraying of the pattern or spraying at a place without the pattern (setting the pattern into a mirror image) can be realized, and gray scale printing is completed; this provides a condition for printing out a mirror image of the pattern. The mirror image of the pattern is the reverse phase of the pattern, and the existing software such as PS and the like can easily reverse the pattern. The purpose of printing the reverse pattern is to print on some textiles needing to be penetrated, such as carpets and long-pile fabrics, because of the printing principle, more ink is jetted on the dark color part of the pattern, and less ink is jetted on the light color part, so that the problem of different penetration depths of the whole picture is caused, and the light color part can be exposed to be white, thereby reducing the product quality. The purpose of adopting mirror image printing is to print a mirror image on a medium through functional ink with the permeation-assisting function, namely, at a deep place of a color pattern, less functional ink with the permeation-assisting function is sprayed, at a shallow place of the pattern, more functional ink with the permeation-assisting function is sprayed, and when a next group of printers or printing modules print color ink, the total amount of the functional ink with the permeation-assisting function printed on the medium and the color ink is just balanced, so that the printing effect of consistent permeation of dark and light colors is achieved.

According to another embodiment of the present invention, with the printing method of the present invention, when N =2, pre-printing of the functional ink and inkjet printing of the inkjet ink can be achieved, and inkjet printing of the inkjet ink and post-printing of the functional ink can also be achieved; and when N is more than 2, the pre-printing of the functional ink, the ink-jet printing of the ink-jet ink and the post-printing of the functional ink can be completed. Particularly, the preprinting process can be split into more printing units so as to complete the printing of functional inks with different speeds, different ink jet amounts and different functions, and to complete the process requirements for speed, functionality, ink jet amount and the like; the ink-jet printing process for ink-jet coloring can also be split into more printing units, for example, the printing units are separated according to the color class, each subunit only completes the printing of ink-jet ink with one color, and a plurality of subunits complete the printing of larger basic colors, so as to expand the printing color gamut and other functional requirements; the printing units can also be combined by single or multiple nozzles with single or multiple nozzles, and can be scanning type or single PASS printing. Similarly, the post-printing process of the functional ink can be also split into a plurality of subunits to complete the ink-jet printing or the ink-jet printing combination with different additives, different precisions, different ink-jet amounts and different functions.

As will be understood by those skilled in the art, an ink-jet ink herein refers to an ink containing a colorant, and in particular, in the present invention, the inkjet ink may be one or more of water-based dye ink, water-based pigment ink, reactive dye ink, disperse dye ink, textile pigment ink, acid dye ink, basic dye ink, neutral dye ink, cationic dye ink, vat dye ink, direct dye ink, soluble vat dye ink, dispersed cationic ink, sulfur dye ink, naphthol chromophore-based insoluble azo dye leuco dye ink, ice dye ink, solvent-based ink, eco-solvent dye ink and eco-solvent pigment ink, and neutral ink, UV ink and water-based UV ink, solvent-based inorganic ceramic ink, water-based UV white ink, and solvent-based white ink.

The printing medium suitable for the functional ink of the present invention may be a printing medium without an ink-absorbing coating, such as fabric, sheet material, coated paper, glass, ceramic, plastic, metal, etc., or a printing medium with an ink-absorbing coating, such as photographic paper, white paper, cardboard, label paper, etc., which are not illustrated herein.

The functional ink of the present invention can be applied not only to thermal expansion type heads of CANON, HP, Lexmark, etc., but also to various types of micro-piezoelectric heads of EPSON, etc., FUJI, etc., and also to piezoelectric print heads of XAAR, kyoto, irkura, panasonic, konica, etc.

The functional ink disclosed by the invention has the beneficial effects that the functional ink can be matched with various ink-jet inks for combined printing, and the ink-jet inks are assisted to realize excellent performances such as permeability, color fixing capability, color expression, fastness and the like on various printing media, so that the high requirements of different media on printing fastness, color and other functionalities are met. The printing process is simple and efficient, the procedures of pretreatment, post-treatment and the like in the prior art can be effectively replaced, the cost is saved, and the production efficiency is improved.

Drawings

FIG. 1 shows a schematic diagram of a printing system, according to an embodiment of the invention;

FIG. 2 is a graph showing a comparison of printing effects in example 1 of the present invention, wherein FIG. 2a is a printed product using a functional ink of the present invention and an acid dye inkjet ink; FIG. 2b is a printed product using only acid dye inkjet inks;

fig. 3 is a graph showing a comparison of printing effects in example 2 of the present invention, in which fig. 3a is a printed product using only an aqueous pigment inkjet ink, and fig. 3b is a printed product using a functional ink of the present invention and an aqueous pigment inkjet ink;

FIG. 4 is a graph showing a comparison of printing effects in example 3 of the present invention, in which FIG. 4a is a digital printed product of a prior art padder padding an active primer, and FIG. 4b is a printed product using a functional ink of the present invention;

fig. 5 is a graph showing a comparison of printing effects in example 4 of the present invention, in which fig. 5a is a printed sample without using functional ink, and fig. 5b is a printed sample using functional ink of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to specific examples. Unless otherwise specified, each component used in the present invention is commercially available.

Example 1

A functional ink is prepared from the following components in percentage by weight: glycerol: 25%, carboxymethyl cellulose: 5%, S-465: 0.5%, triethanolamine: 1.2%, ammonium sulfate: 4.5%, sodium tripolyphosphate: 0.7%, potassium sorbate: 0.5%, penetrant JFC: 6% and deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink.

The functional ink prepared in the embodiment is matched with acid dye inkjet ink (for example, the inkjet printing acid dye ink in ZL 2010102562359) to be used for printing a mirror image gray scale image of a required pattern on a nylon carpet, and the specific printing process comprises the following steps: the functional ink prepared in the embodiment is used for printing on a nylon carpet, then the acid dye ink-jet ink is used for printing, and then the nylon carpet is dried, steamed (at 100 ℃ for 25 minutes), washed and dried. Meanwhile, the same comparison was made with a printed matter using only the acid dye inkjet ink, and the result is shown in fig. 2, in which: FIG. 2a is a printed product using the functional ink of the present embodiment and an acid dye inkjet ink; fig. 2b is a printed product using only acid dye inkjet inks. As can be seen from fig. 2, the ink penetration depth in the nylon carpet of fig. 2a using the functional ink of the present embodiment is much greater than the printing depth of fig. 2b without the functional ink; therefore, the functional ink prepared in the embodiment can effectively improve the permeability of the acid dye ink on the nylon carpet.

Example 2

A functional ink is prepared from the following components in percentage by weight: 1, 2-propylene glycol: 25%, polyvinylpyrrolidone K-40 (PVP-K40): 1%, S-465: 1%, ammonium sulfate: 0.5%, sodium tripolyphosphate: 2.2%, dodecyldimethylbenzylamine chloride: 7.5%, isothiazolinone: 0.03%, deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink.

The functional ink prepared in the embodiment is matched with an aqueous pigment inkjet ink (for example, aqueous pigment digital printing ink in ZL 2006100265953) for printing on cotton fabrics, and the specific printing process comprises the following steps: the functional ink prepared in the embodiment is used for pre-printing on cotton fabric, then is printed by water-based pigment ink-jet ink, and is dried and baked (at 160 ℃ for 3 minutes) to obtain a finished product. Meanwhile, the same comparison was made with a printed matter using only the aqueous pigment inkjet ink, and the result is shown in fig. 3, in which: fig. 3a is a printed product using only the aqueous pigment inkjet ink, and fig. 3b is a printed product using the functional ink of the present embodiment and the aqueous pigment inkjet ink. As can be seen from fig. 3, the printed matter using the functional ink of the present embodiment is stronger in color depth, saturation, glossiness, and the like than the printed matter of fig. 3a without the functional ink. The Lab value measurement results of both are shown in Table 1:

TABLE 1 Lab value test results

As can be seen from the detection results in Table 1, the color density, the color depth and the saturation of the finished product obtained by preprinting the functional ink of the embodiment are greatly improved, the color gamut is enlarged to a great extent, and the product quality is improved.

Example 3

A functional ink is prepared from the following components in percentage by weight: diethylene glycol: 21%, polyethylene glycol 400: 5%, PVP-K40: 4.5%, S-465: 0.5%, sodium dodecyl sulfate: 0.45%, triethanolamine: 1% and sodium carbonate: 1.5%, EDTA-disodium: 0.5%, penetrant JFC: 0.5%, deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink of the embodiment.

The functional ink prepared in this example is used for printing on rayon filament fabric in combination with reactive dye inkjet ink (for example, reactive dye ink in ZL 2011100060210), and the specific printing process includes: the functional ink prepared in the embodiment is used for pre-printing and drying on cotton fabric, then printing is carried out by using reactive dye ink, and a finished product is obtained by drying, steaming (at 100 ℃ for 15 minutes), washing with cold water, washing with hot water, soaping, washing with water and drying. Meanwhile, the digital printing products of the padder padding active base paste commonly used in the field are compared, and the result is shown in fig. 4, wherein fig. 4a is the digital printing product of the padder padding active base paste in the prior art, and fig. 4b is the printing product using the functional ink in the embodiment, and as can be seen from fig. 4, the color and the fastness performance of the two products are equivalent, which indicates that the digital printing product using the functional ink in the embodiment has the process function of the traditional padding base paste. Table 2 further shows the Lab value measurements for both:

TABLE 2 Lab value test results

From the Lab value test results in table 2, it can be further seen that the color obtained from the product printed with the functional ink of the present invention is deeper or equivalent to that of the prior art in terms of representative CMYK four colors, which indicates that the functional ink of the present invention can extend the printing color gamut.

Example 4

A functional ink is prepared from the following components in percentage by weight: 1, 5-pentanediol: 27%, polyethylene glycol 400:10%, S-465: 1%, sodium dodecyl sulfate: 1%, triethanolamine: 0.5%, EDTA-disodium: 0.7%, sodium tripolyphosphate: 1.5%, Lubrijet T900 (lubri corporation, its main component is polyurethane resin): 15%, magnesium sulfate: 0.7%, PVA: 0.55%, potassium sorbate: 0.2%, deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink of the embodiment.

The functional ink prepared in the embodiment is matched with an aqueous pigment inkjet ink (for example, aqueous pigment digital printing ink in ZL 2006100265953) for printing on cotton fabrics, and the specific printing process comprises the following steps: the functional ink in the embodiment 2 is firstly used for preprinting on the cotton fabric, then the aqueous pigment ink is used for printing, and finally the functional ink in the embodiment is used for printing at the same position of the cotton fabric to obtain the finished product. Meanwhile, the results of comparison with the printed product without functional ink are shown in fig. 5 and tables 3 to 4, respectively, where fig. 5a is a printed sample without functional ink and fig. 5b is a printed sample with functional ink, soaping fastness test method: AATCC-61-2003-2A (50 steel balls); fabric: pure cotton yarn card. As can be seen from fig. 5 and tables 3 and 4, the printed samples using the functional ink of the present invention have significantly improved color gloss, color fastness, etc. In addition, the wet rubbing fastness of the printed sample after the functional ink of the embodiment is used is improved by 0.5 grade compared with the wet rubbing fastness of the sample without the functional ink, so that the wet rubbing fastness is higher, and the wearability of the printed sample is improved.

TABLE 4 rubbing fastness test results

Example 5

A functional ink is prepared from the following components in percentage by weight: diethylene glycol monobutyl ether: 33%, hydroxypropylmethylcellulose: 4.5%, S-465: 1.2%, triethanolamine: 2%, EDTA-disodium: 0.2%, potassium sorbate: 0.22%, aqueous silicone oil EASYSOFT AEE: 7% and deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink of the embodiment.

The functional ink prepared in the embodiment is matched with an aqueous pigment inkjet ink (for example, aqueous pigment digital printing ink in ZL 2006100265953) for printing on cotton fabrics, and the specific printing process comprises the following steps: firstly, printing on cotton fabric by using water-based pigment ink, then printing after using the functional ink in the embodiment, and drying and baking (at 140 ℃ for 1 minute) to obtain a finished product. Compared with a printing sample without the functional ink, the sample obtained after the functional ink is used for post-printing has the advantages that the softness, smoothness, resilience, whiteness and the like of the fabric hand feeling are remarkably improved.

Example 6

A functional ink is prepared from the following components in percentage by weight: 1, 2-hexanediol: 15%, polyethylene glycol 400:25%, sodium alginate: 3.5%, sodium dodecyl sulfate: 1.2%, triethanolamine: 3%, EDTA-disodium: 0.5%, sodium tripolyphosphate: 0.2%, dodecyldimethylbenzylammonium chloride: 5% and deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink of the embodiment.

The functional ink prepared in the embodiment is matched with a disperse dye ink (for example, a heat transfer ink in ZL 2014108204007) to be used for printing on terylene, and the specific printing process comprises the following steps: firstly, printing on the terylene by using the disperse dye ink, then printing after using the functional ink in the embodiment, and carrying out heat treatment (at 130 ℃ for 3 minutes) to obtain a finished product. Meanwhile, antistatic performance test was performed by comparing the printed products without using functional ink, and the results are shown in table 5, in which: the sample A is a printed sample using the functional ink of the embodiment, the sample B is a printed sample without using the functional ink, and the specific resistance of the polyester fabric is generally more than 10¹⁴Ω · cm is a high-resistance nonconductive substance, and is likely to be concentrated to cause concentrated discharge when static electricity is generated. Specific resistance is reduced to 10⁷The conductivity is greatly increased below omega cm, and the conductive fiber and the fabric are obtained. As can be seen from table 5, the fabric printed with the functional ink of the present embodiment has a significantly reduced unit resistance and an improved conductivity under different relative humidities, so as to increase the conductivity of the fabric and enhance the antistatic ability of the fabric.

TABLE 5 antistatic Property test results

Relative humidity	30%	45%	65%
				Sample A	＞1013 Ω·cm	＞1013 Ω·cm	＞1013 Ω·cm
Sample B	1011~1012Ω·cm	1010~1011Ω·cm	109~1010Ω·cm

Example 7

A functional ink is prepared from the following components in percentage by weight: polyethylene glycol 200: 5%, polyethylene glycol 400:25%, carboxyethyl cellulose: 0.85%, sodium dodecyl sulfate: 0.77%, triethanolamine: 0.5%, EDTA-tetrasodium: 0.3%, potassium sorbate: 1.2%, penetrant JFC: 0.2% of fluorine-containing acrylate emulsion (Shanghai Homing chemical industry): 15% and deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink of the embodiment.

The functional ink prepared in the embodiment is matched with a disperse dye ink (for example, a heat transfer ink in ZL 2014108204007) to be used for printing on terylene, and the specific printing process comprises the following steps: firstly, printing on the terylene by using the disperse dye ink, then printing after using the functional ink in the embodiment, and carrying out heat treatment (at 150 ℃ for 1 minute) to obtain a finished product. Meanwhile, the contact angle of the printed finished product without the functional ink to pure water is detected in a contrasting manner, the contact angle is large, water is not easy to wet on the surface of the cloth, the waterproof performance is high, the contact angle is small, water is easy to wet on the surface of the cloth, the waterproof performance is poor, and table 6 shows the detection result, wherein: sample a is a printed sample using the functional ink of the present embodiment, and sample B is a printed sample without using the functional ink.

TABLE 6 detection of Water repellency

As can be seen from table 6, in sample a printed using the functional ink of this example, the contact angle of pure water on the surface thereof becomes large, and the relative hydrophilicity is changed to the relative water repellency, resulting in a good water-repellent finish effect.

Example 8

A functional ink is prepared from the following components in percentage by weight: 1,3 propylene glycol: 10%, polyethylene glycol 400:15%, PVP-K40: 4.4%, S-465: 0.5%, ammonium sulfate: 1%, water-soluble chitosan quaternary ammonium salt: 8%, sodium pyrophosphate: 3.5%, sodium benzoate: 0.5%, deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink of the embodiment.

The functional ink prepared in the embodiment is matched with a disperse dye ink (for example, a heat transfer ink in ZL 2014108204007) to be used for printing on terylene, and the specific printing process comprises the following steps: firstly, printing on terylene by disperse dye ink, then, printing after by functional ink in the embodiment, pre-baking (80 ℃) and heat treatment (3 minutes at 150 ℃) and then airing to normal temperature for microbial cultivation (according to AATCC90-1999 halo test method, the method is a quick qualitative method for antibacterial effectiveness for antibacterial agent screening, and the principle is that test bacteria are inoculated on agar culture medium and then tightly attached to a sample, and after 24 hours of cultivation at 37 ℃, the propagation condition of the bacteria and the size of the halo around the sample are observed by a magnifying glass). Meanwhile, the results of comparison with the printed samples without using the functional ink are shown in table 7, wherein sample a is the printed sample using the functional ink of the present embodiment, and sample B is the printed sample without using the functional ink.

TABLE 7 comparison of antibacterial Properties

As can be seen from table 7, the sample a printed using the functional ink of the present example showed a distinct antibacterial ring in the halo method antibacterial test, indicating that it has good antibacterial performance, relative to the sample B.

Example 9

A functional ink is prepared from the following components in percentage by weight: dipropylene glycol: 10%, polyethylene glycol 400:12%, carboxyethyl cellulose: 2%, S-465: 0.5%, ammonium sulfate: 2%, sodium tripolyphosphate: 0.2%, penetrant JFC: 0.5 percent of three-in-one easy-care stiffening resin YT-808 (chemical engineering of Jinnan Tao): 11% and deionized water: the rest is; and mixing and stirring the components uniformly according to the weight percentage to obtain the functional ink of the embodiment.

The functional ink prepared in the embodiment is matched with an aqueous pigment inkjet ink (for example, aqueous pigment digital printing ink in ZL 2006100265953) for printing on cotton fabrics, and the specific printing process comprises the following steps: firstly, the cotton fabric is printed by the water-based pigment ink, and after baking (1 minute at 150 ℃), the cotton fabric is printed by the functional ink in the embodiment, and then the cotton fabric is thermally treated (1 minute at 150 ℃) to obtain a finished product. Compared with a printing sample without using functional ink, the sample obtained after printing by using the functional ink of the embodiment has the advantages that the fabric style tends to be straight and smooth, the elasticity is good, the shrinkage rate is reduced, and the fabric size stability is good.

The present invention has been described in detail by way of various embodiments and examples. However, variations and additions to the embodiments will become apparent to those of ordinary skill in the art upon a reading of the foregoing description. It is the intention of the applicants that all such variations and additions fall within the scope of the claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined generally in dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the specification and relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Claims

1. A method of printing colorless functional ink, comprising: the colorless functional ink is applied on a printing medium through an ink-jet printer and is matched with dye ink or pigment ink to complete the corresponding printing effect, wherein: the colorless functional ink is prepared from the following components in percentage by weight: humectant: 5% -40%, viscosity modifier: 0.1% -5%, surfactant: 0.1% -10%, pH regulator: 0.1% -5%, complexing agent: 0.1% -5%, bactericide: 0.1% -2%, functional auxiliary agent: 0.1% -30%, water: the rest is; the printing method comprises the following steps: 1) pre-printing on a printing medium by using the functional ink before the color ink-jet ink is subjected to ink-jet printing; 2) after the inkjet printing of the inkjet ink on the printing medium is finished, post-printing on the printing medium by using the functional ink; and 3) printing on a print medium simultaneously with the inkjet ink using the functional ink;

wherein: the pre-printing comprises at least one printing of the same functional ink or at least one printing of functional inks with different functions;

the post-printing comprises at least one printing of the same functional ink or at least one printing of functional inks with different functions;

the printing method is realized by selecting at least one of a nozzle channel, a nozzle number, a nozzle group, a printer number and a printing module;

the preprinting is divided into a plurality of printing units to complete the printing of functional ink with different speeds, different ink jet amounts and different functions;

and the post-printing is divided into a plurality of printing units to complete the printing of functional ink with different speeds, different ink jet amounts and different functions.

2. The printing method according to claim 1, wherein: the functional auxiliary agent is one or more of a quick color developing agent, a fastness improving agent, a penetrating agent, a softening agent, an antistatic agent, a stiffening finishing agent, an antibacterial finishing agent and a waterproof finishing agent.

3. The printing method according to claim 2, wherein: the rapid color-developing agent is one or more of cetylpyridinium chloride, cetylpyridinium bromide, dicyandiamide-formaldehyde primary condensate, polyamine condensate, a color fixing agent KS, a phenolsulfonic acid-formaldehyde condensate and a metal salt; the fastness improver is one or more of water-based acrylic resin, water-based polyurethane resin, water-based fluorocarbon resin, polyacrylamide, ammonium salt, fatty alcohol ether and metal salt; the penetrating agent is one or more of penetrating agent JFC, peregal O, penetrating agent T, penetrating agent OEP-70 and penetrating agent AEP.

4. The printing method according to claim 2, wherein: the softening agent is one or more of fatty acid polyol ester, alkanolamide, polyoxyethylene fatty amide, polyethylene wax, organic silicon polymer, anhydride derivatives, ketene, pyridine quaternary ammonium salt derivatives, stearamide methylene pyridine chloride and epoxy derivatives.

5. The printing method according to claim 2, wherein: the antistatic agent is one or more of ethoxylated fatty alkylamine, ethoxylated alkyl amine and glycerol-stearate.

6. The printing method according to claim 2, wherein: the stiffening finishing agent is one or more of polycyanum amide resin, urea-formaldehyde resin, polyacrylate, polyvinyl acetate and copolymer thereof, polyvinyl alcohol and polyester.

7. The printing method according to claim 2, wherein: the antibacterial finishing agent is one or more of nano zinc oxide, nano titanium oxide, nano aluminum oxide and chitosan.

8. The printing method according to claim 2, wherein: the waterproof finishing agent is one or more of amino silicone oil, polyether modified fluorocarbon resin with a fluorocarbon structure and fluoroalkyl acrylate emulsion.

9. The printing method according to claim 1, wherein: the surfactant is one or more of sodium dodecyl sulfate, linear alkyl benzene sulfonate, fatty alcohol-polyoxyethylene ether sodium sulfate, fatty alcohol-polyoxyethylene ether ammonium sulfate, sodium lauryl sulfate, lauroyl glutamic acid, nonylphenol polyoxyethylene ether, peregal O, diethanol amide, stearic acid monoglyceride, lignosulfonate, heavy alkylbenzene sulfonate, alkyl sulfonate, a dispersing agent NNO, a dispersing agent MF, a PO-EO copolymer, fatty alcohol-polyoxyethylene ether, an acetylene glycol surfactant, an organosilicon surfactant and an organic fluorine surfactant.

10. The printing method according to claim 1, wherein: the complexing agent is one or more of ammonium phosphate, sodium tripolyphosphate, sodium pyrophosphate, sodium hexametaphosphate, monoethanolamine, diethanolamine, triethanolamine, sodium aminotriacetate, disodium EDTA, tetrasodium EDTA, diethyltriamine pentaacetic acid, hydroxyl carboxylate, organic phosphate and acrylic chelating agent.