JPH0536545B2 - - Google Patents

Description

[Detailed description of the invention]

(Field of Industrial Application) The present invention relates to a method for printing fabrics made of synthetic fibers and/or semi-synthetic fibers (hereinafter simply referred to as synthetic fibers) using an inkjet method. The present invention relates to a printing method using an inkjet method. (Prior Art) Conventionally, printing methods such as roller printing, screen printing, and transfer printing have been used to print woven fabrics, nonwoven fabrics, and blended fabrics made of various synthetic fibers. A printing method using an inkjet recording method has also been proposed. (Problem to be solved by the invention) However, in the conventional general textile printing method, it is necessary to create printing plates for printing, and the creation of these printing plates, such as printing plate cylinders and screen plates, is expensive. Also, in transfer printing, it is expensive to create a plate for printing transfer paper, so it is not cost-effective unless a large quantity is produced. In addition, since the fashion period for printed cloth patterns is generally short, making plates each time increases the cost, and there is a serious problem in that it is not possible to respond quickly to trends and a large amount of inventory is required.
In order to solve these drawbacks, inkjet printing has also been proposed, but in this inkjet printing, high viscosity recording liquids (inks) such as conventional printing pastes cannot be used; the ink is water-based. Due to various reasons such as synthetic fibers hardly absorbing water-based ink, when printing on woven fabric etc.
Due to the lack of ink absorbency of woven fabrics and the presence of textures, the applied ink easily bleeds, making it difficult to form precise printed patterns. Even when dyed, a sharp pattern could not be formed and the rate of dyeing was also poor. Therefore, an object of the present invention is to solve the above-mentioned economical problems in the conventional general textile printing method, the problem of not being able to obtain accurate prints in the printing method using inkjet recording, and the problem of low dye dyeing rate. An object of the present invention is to provide a printing method using an inkjet method that can solve the problems at the same time. These objects and other objects of the present invention are achieved by the present invention described below. (Disclosure of the Invention) That is, the present invention is a method for printing by applying a recording liquid containing a disperse dye to fabrics made of synthetic fibers and/or semi-synthetic fibers by an inkjet method, Or water-soluble resin and SBR latex, NBR latex,
The above-mentioned recording liquid is applied to the above-mentioned fabric, which has previously been provided with a recording liquid-receiving layer containing at least one resin selected from polyvinyl formal, polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, phenolic resin, and alkyd resin. This textile printing method is characterized in that the recording liquid-receiving layer is removed by a cleaning treatment after a dyeing treatment is performed. To explain the present invention in more detail, the main feature of the present invention is that in an inkjet printing method, an inkjet recording liquid is applied to the surface of the fabric or the fibers constituting the fabric as the material to be printed. The objective is to use fabrics provided with an ink-receiving layer that can easily and quickly absorb and receive ink. The fabrics used in the present invention and which mainly characterize the present invention include synthetic fibers such as polyester, vinylon, polypropylene, acrylic, and nylon, and semi-synthetic fibers such as acetate and triacetate, which can be dyed with disperse dyes. Fabrics made of fibers, or these different fibers or these fibers and other fibers, such as cotton, wool,
Blended fabrics with fibers of natural fibers such as silk and hemp, which have a layer in which these fabrics or the fibers constituting these fabrics can quickly and easily absorb and receive the ink for the inkjet method used. It was formed. By forming a layer having such performance on the textile material to be printed, the present inventor has solved the drawbacks of the prior art described above, especially the problems caused by the use of low viscosity and water-based ink by the inkjet method. The present invention was completed based on the knowledge that the problem can be easily solved. Preferred materials for forming the above-mentioned receptor layer are water-soluble or hydrophilic natural or synthetic polymers, and preferred specific examples include wheat flour,
Rice flour, rice bran, funoori albumin, gelatin, casein, starch, cellulose, gum arabic,
Natural compounds such as cant rubber, locust bean rubber, sodium alginate, bentonite, and their modified products and chemical reaction derivatives, water-soluble polyamide, polyacrylamide, quaternized polyvinylpyrrolidone, polyethyleneimine, polyvinylpyridylium halide, melamine resin, polyurethane , polyvinyl alcohol, water-soluble polyester, synthetic resins such as sodium polyacrylate, and their modified products and derivatives.
More than one species may be used as desired. Furthermore, in order to strengthen the ink-receiving layer and/or improve its adhesion to the base material, SBR latex, NBR latex, polyvinyl formal,
At least one resin selected from polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, phenolic resin, and alkyd resin is used in combination. As a method for forming such an ink-receiving layer, a treatment liquid is prepared by dissolving or dispersing the above-mentioned polymers alone or in a mixture in an appropriate solvent, and the treatment liquid is applied by, for example, a dipping method, a spraying method, This is carried out by treating the fabric or the fibers forming it by a known method such as a roll coating method, a rod bar coating method, or an air knife coating method. Such a treatment may be applied to the yarn or fiber before it is woven and then woven, or it may be applied to the fabric after it has been woven. Further, the material may be treated in advance before printing, or it may be processed immediately before printing. The thickness of the ink-receiving layer formed in this way may be within a range that can receive ink, and it depends on the amount of ink to be recorded, but if it is 0.1 μm or more, then
It is not particularly limited. Practically speaking, 0.5
A range of ~30 μm is preferred. By forming an ink-receiving layer on the surface of the fabric or the fibers constituting it as described above,
When ink is applied to these fabrics by the inkjet method, the applied ink, especially its aqueous medium, is absorbed and received by the ink-receiving layer within three minutes, so ink dots do not bleed excessively on the fabric. Therefore, precise printing and a high dyeing rate can be achieved through the subsequent dyeing process. In addition, since the applied ink is absorbed and received in such a short time, even if the printed surface is touched afterwards, it will not contaminate others, and it can be stacked or rolled up immediately after printing. can be stored in any form until the next dyeing process. On the other hand, when conventional fabrics without an ink-receiving layer as described above are used as printing fabrics, the ink produced by the inkjet method is generally water-based and has a low viscosity; Synthetic fibers such as these do not absorb much water-based ink, and furthermore, due to the presence of textures in the fabric, the applied ink dots bleed excessively, making it difficult to form fine patterns. Such various conventional techniques are fully solved by the present invention. As the disperse dye for the inkjet ink used in the method of the present invention, any conventionally known disperse dye can be used, but C.
I. Dispers Yellow 5, 42, 56, 64, 76,
79, 83, 100, 124, 140, 160, 162, 163, 164,
165, 186, 192, 224; CI Daspers Orange
13, 29, 30, 31, 33, 43, 49, 50, 55, 61, 73,
78, 119; CI dispersion red 43, 54, 56,
72, 73, 76, 88, 91, 92, 93, 103, 111, 113,
126, 127, 128, 135, 143, 145, 152, 153, 154,
164, 181, 188, 189, 192, 203, 205, 206, 207,
221, 224, 225, 227, 257, 258, 288, 293; CI
Disperse Violet 27, 35, 38, 46, 52,
56; CI Daspers Brown 1, 9; CI Daspers Blue 54, 60, 73, 87, 94, 113, 128,
139, 142, 143, 146, 148, 149, 158, 167, 176,
183, 186, 187, 197, 198, 201, 205, 207, 211,
214, 224, 225, 257, 259, 267, 268, 270,
301; Kayaseron Red E-GL, Kayaseron Blue E-TB, etc. In addition, when the fabric to be printed is a blended fabric with other fibers, such as cotton, silk, hemp, wool, and other natural fibers, dyes for these natural fibers, such as direct dyes, are used in addition to disperse dyes. Acid dyes, chromium dyes (acidic mordant dyes), reactive dyes, reduced vat dyes, soluble vat dyes, reduced sulfur dyes, naphthol dyes, etc. can be used in combination. In the inkjet ink used in the present invention, the above-mentioned disperse dye is dispersed in a medium at a concentration of about 0.1 to 15% by weight. As the medium for the ink, water alone is used, preferably a mixture of water and a water-soluble organic solvent. Examples of the organic solvent used include alkyl alcohols having 1 to 4 carbon atoms, such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol, and isobutyl alcohol; Amides such as dimethylformamide and dimethylacetamide; ketones or keto alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; polyalkylene glycols such as polyethylene glycol and polypropylene glycol; ethylene glycol, propylene glycol, butylene Alkylene glycols in which the alkylene group contains 2 to 6 carbon atoms, such as glycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol, hexylene glycol, diethylene glycol; glycerin; ethylene glycol methyl (or Lower alkyl ethers of polyhydric alcohols such as ethyl) ether, diethylene glycol methyl (or ethyl) ether, and triethylene glycol monomethyl (or ethyl) ether; N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidone Examples include non. Although the above-mentioned media can be used alone or as a mixture, the most preferred media composition consists of water and one or more water-soluble organic solvents, where the water-soluble solvent is at least one water-soluble high-boiling organic solvent, e.g. It contains polyhydric alcohols such as ethylene glycol, propylene glycol, and glycerin. The amount of these media used is such that when the ink composition is prepared, the content of the disperse dye is about 0.1
The amount is ~15% by weight. The ink composition used in the present invention is prepared by mixing the above-mentioned essential components and optional components, mixing and grinding using a conventionally known grinding means such as a ball mill, sand mill, speed line mill, etc. Adjust the concentration with the medium and adjust the pH to 4.
The particle size of the disperse dye is usually about 30 μm or less, preferably about 20 μm or less. If the particle size is too large, problems such as nozzle clogging may occur during inkjet recording.
Problems arise with level dyeing properties in the subsequent dyeing process. Furthermore, when a medium that dissolves the disperse dye is selected as the medium, the ink composition of the present invention can be obtained by mere dissolving action such as heating. The essential components of the ink composition used in the present invention are as described above, but various other conventionally known dispersants, surfactants, viscosity modifiers, etc. can be added as necessary. Dispersants or surfactants that can be added as necessary include fatty acid salts, alkyl sulfate ester salts, alkylbenzene sulfonates, alkylnaphthalene sulfonates, dialkyl sulfosuccinates, alkyl phosphate ester salts, naphthalene sulfonate formalin. Anionic dispersants or surfactants such as condensates, polyoxyethylene alkyl sulfate salts; polyoxyethylene alkyl ethers, polyoxyethylene alkyl phenyl ethers, polyoxyethylene fatty acid esters,
Sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine, glycerol fatty acid ester,
Nonionic dispersants or surfactants such as oxyethylene oxypropylene block copolymers are important. As the viscosity modifier, mainly water-soluble natural or synthetic polymers such as carboxymethylcellulose, sodium polyacrylate, polyvinylpyrrolidone, gum arabic, and starch are preferred, and these viscosity modifiers may or may not be used. The viscosity of the ink composition of the present invention was 50 cps at 25°C.
Below, preferably 1 to 10 cps. In addition to the above three types of additives, for example, antifoaming agents, penetrants, antifungal agents, PH regulators, etc. can be added as appropriate. Furthermore, in order to prepare inks used in inkjet recording methods of the type in which the ink is charged, resistivity adjusters such as inorganic salts of lithium chloride, ammonium chloride, and sodium chloride are added. When applied to an inkjet method that ejects ink through the action of thermal energy, the thermal properties (e.g., specific heat, coefficient of thermal expansion, thermal conductivity, etc.) may be adjusted. . The inkjet recording method used in the present invention may be any method as long as it can effectively remove the ink composition from the nozzle and apply the ink to the fabric, which is the projectile. For example, IEEE Trans
actions on Industry Applications Vol.JA−13,
No. 1 (February/March 1977 issue) and Nikkei Electronics No. 305 (December 6, 1982 issue).
The methods described above are suitable for the textile printing method of the present invention.To explain some of them, there is an electrostatic attraction method.In this method, a nozzle and an accelerating electrode placed several mm in front of the nozzle are used. A method in which a strong electric field is applied between the ink particles and the ink particles are drawn out one after another from a nozzle, and an information signal is given to the deflection electrodes while the drawn ink composition flies between the deflection electrodes to record the ink particles. There is a method that ejects ink particles in response to information signals without deflecting the information.
All are effective in the textile printing method of the present invention. The second method is to forcibly eject minute ink particles by applying high pressure to the ink with a small pump and mechanically vibrating the nozzle with a crystal oscillator. At the same time as the injection, it is charged according to the information signal. When the charged ink particles pass between the deflection electrode plates, they are deflected according to the amount of charge. Another method using this method is called the microdot inkjet method. In this method, ink pressure and excitation conditions are kept within a certain range of values, and two types of ink liquid, large and small, are injected from the nozzle tip. Droplets are generated, and only the small and medium-sized droplets are used for recording. The feature of this method is that it is possible to obtain a group of minute droplets even with a conventionally large nozzle diameter. A third method is a piezo element method, in which a piezo element is used as a pressure means for applying pressure to the ink, rather than a mechanical means such as a pump as in other methods. This method applies an electric signal to a piezo element to cause mechanical displacement, thereby applying pressure to the ink and ejecting it from a nozzle. In addition, in the method described in Japanese Patent Application Laid-open No. 54-51837, ink subjected to the action of thermal energy undergoes a rapid volume change, and the acting force due to this state change causes the ink to be ejected from the nozzle. An inkjet method can also be used effectively. Any of the various inkjet recording methods described above can be used, and by employing any of these methods, characters, figures, and other patterns are printed using colored ink compositions on the surface of a fabric having a specific structure as described above. However, in the method of the present invention, the ink dots attached to the fabric are quickly absorbed and retained in the ink receiving layer of the fabric before they bleed excessively. The dye retention rate during the process is also high. In addition, within three minutes after printing, the sheets reach a state similar to a dry state, and can be stacked or rolled up immediately. Therefore, a clear and fine pattern can be formed even through a subsequent dyeing process such as heat treatment. On the other hand, when conventional fabrics are used, it is difficult to form fine patterns due to ink bleeding on the fabrics due to the use of low viscosity inks and the use of hydrophobic fabrics. Furthermore, the dye staining rate was also low. As described above, the ink composition can be deposited on the fabric according to the image signal by the method of the present invention, and the dye in the ink composition in this state is simply applied to the ink-receiving layer on the surface of the woven fabric, etc. It is absorbed into
Therefore, it is preferable to subsequently perform a dyeing treatment such as a heat treatment. These dyeing treatments vary depending on the dye used and the type of fabric used, but common methods include steaming treatment with superheated steam, heat treatment with warm or hot water, dry heat treatment, and surfactant treatment. Appropriately select from soaping treatment with an aqueous agent solution, etc. Through this dyeing process, the dye in the ink-receiving layer is sufficiently dyed onto the fibers of the fabric, and the water-soluble ink-receiving layer is washed away by soaping or the like, resulting in a printed fabric of excellent quality. is obtained. Therefore, according to the present invention as described above, there is no need to create an expensive printing plate as in conventional general textile printing, and images to be printed can be created and modified extremely easily using a computer. Therefore, it is possible to respond to changes in fashion from time to time without requiring expensive plates as in the prior art. Therefore, sufficient profits can be secured even with small-scale production without mass production as in the prior art. Further, it has the advantage that it can be applied not only to industrial textile printing methods but also to hobby print printing in ordinary households. Next, the present invention will be explained in more detail with reference to various examples. Note that the numbers in the middle of the sentence and % are based on weight. Ink production example 1 Disperse dye (CI Disperse Blue 187)
5 parts anionic surfactant (dispersant) (Demol N, manufactured by Kao Soap Co., Ltd.) 4 parts ethylene glycol 15 parts diethylene glycol 13 parts water 65 parts All the above ingredients were dispersed in an alumina ball mill for about 36 hours. After that, adjust the pH with sodium hydroxide.
8.3, and further dispersed in an alumina ball mill for 3 hours, and then coarse particles with a particle size of 10 μm or more were removed using a fluoropore filter FP-1000 (manufactured by Sumitomo Electric Industries, Ltd.). A water-based ink (A) was obtained. Ink production example 2 Disperse dye (CI Disperse Yellow 76)
5-part anionic surfactant (Ionet D-2,
Sanyo Chemical Industries, Ltd.) 4 parts diethylene glycol 15 parts triethylene glycol monomethyl ether
10 parts water 70 parts After dispersing all the above ingredients in an alumina ball mill for about 36 hours, adjust the pH with potassium hydroxide.
7.6, further dispersed for 2 hours using a homogenizer, and then centrifuged to remove coarse particles to obtain aqueous ink (B). Ink production example 3 Disperse dye (CI Disperse Red 11) 4-part anionic surfactant (Nitsukor OTP-
100s, manufactured by Nikko Chemicals Co., Ltd.) 0.5 part anionic surfactant (Demol C, manufactured by Kao Soap Co., Ltd.) 1.5 parts nonionic surfactant (Emulgen 911, manufactured by Kao Soap Co., Ltd.) 0.2 part iso-propyl Alcohol 0.5 parts Propylene glycol 15 parts Polyethylene glycol 5 parts Water 75 parts After dispersing all the above ingredients in an alumina ball mill for about 40 hours, the pH was adjusted with potassium hydroxide.
7.4 and further dispersed for 2 hours. After that, coarse particles with a particle size of 5 μm or more were removed using a fluoropore filter FP-500 (manufactured by Sumitomo Electric Industries, Ltd.) to form a water-based ink.
I got (C). Ink-receiving layer preparation example 1 Locust bean rubber 0.2 parts Polyvinyl formal 0.05 parts Water 99.75 parts All the above ingredients were stirred for one day and night, then boiled and cooled to obtain a preparation liquid. A fabric to be printed was treated with this prepared liquid by a dipping method, further squeezed with a roller, and then dried to form an ink-receiving layer on the fabric to be printed. Ink-receiving layer preparation example 2 Sodium alginate 1 part Carboxymethyl cellulose 0.1 part Polyvinyl acetate 0.1 part Water 98.8 parts An ink-receiving layer was formed on a fabric to be printed in the same manner as in Preparation Example 2 using all the above components. Printing Examples The results of printing examples performed using the inks of Ink Production Examples 1 to 3 on white fabrics treated in Ink Receiving Layer Preparation Examples 1 to 3 are shown in Table 1 below. Printing was performed using a printer using a piezo element (nozzle diameter: 65 μΦ, PJ-1080A, manufactured by Canon Inc.), and then a fixing (dying) process was performed. After that, wash with water to remove the receptor layer.
After drying, the quality of the prints was visually judged. Comparative Example When similar printing was performed without providing an ink-receiving layer using the combinations shown in Table 1 below, the results showed that the density, color tone, strike-through, and edge sharpness were particularly poor when an ink-receiving layer was provided. The results were poor in comparison.

【table】

【table】

Claims (1)

[Scope of Claims] 1. A method of printing by applying a recording liquid containing a disperse dye to fabrics made of synthetic fibers and/or semi-synthetic fibers using an inkjet method, which method comprises printing at least a hydrophilic or water-soluble dye. A recording liquid receiving layer containing a resin and at least one resin selected from SBR latex, NBR latex, polyvinyl formal, polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, phenolic resin, and alkyd resin. A textile printing method, characterized in that the recording liquid is applied to the fabric that has been provided in advance, and then, after a dyeing process is performed, the recording liquid receiving layer is removed by a washing process. 2. The printing method according to claim 1, wherein the thickness of the recording liquid receiving layer is 0.5 to 3.0 μm.