JPH0360952B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a printing method for fabrics made of synthetic fibers using an inkjet method, and more specifically, it is characterized by using fabrics having a specific configuration. 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 cylinders and screen plates, is expensive. Also, in transfer printing, the production of plates for printing transfer paper is expensive, so the cost is not worth it unless a considerable amount is produced. Also,
Generally, printed cloth patterns have a short fashion period, so
Making a plate each time increases the cost,
There is a serious problem in that they are unable to respond quickly to such trends and end up with a large amount of inventory. In order to solve these drawbacks, printing using an inkjet method has been proposed, but in printing using this inkjet method, high viscosity recording liquids (hereinafter referred to as inks) such as conventional printing pastes cannot be used, and the ink is water-based. Due to various reasons such as synthetic fibers hardly absorb water-based ink and the surface smoothness of fabrics made from these synthetic fibers being low, when printing on woven fabrics, etc., the woven fabric has no ink absorbency and the texture is rough. Because of this presence, the applied ink tends to bleed, making it difficult to form precise printed patterns.Therefore, even if the dye is dyed after printing, a sharp pattern cannot be formed. Ta. Therefore, an object of the present invention is to provide a textile printing method using an inkjet system that can simultaneously solve the economic problems of the conventional general textile printing methods as described above and the problem of not being able to obtain accurate prints in the textile printing method using inkjet recording. The goal is to provide the following. 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 provides a textile printing method in which an ink containing a disperse dye is applied to a fabric made of synthetic fibers or a blended fabric of synthetic fibers and natural fibers by an inkjet method, and then dyed. In this step, the application of ink to the fabrics is carried out for 25 minutes.
This printing method is characterized in that it is carried out after forming an ink-receiving layer having a fluidity and a viscosity of 1000 cp or more at °C. To explain the present invention in more detail, the main feature of the present invention is that in a printing method using an inkjet method, ink, which is a recording liquid of the inkjet method, can be easily and quickly applied to the surface of the fabric as a material to be printed. An ink-receiving layer made of a hydrophilic resin liquid that can be absorbed and received is provided, and the ink-receiving layer is
The aim is to use fabrics that have a viscosity of 1000 cp or more at 25°C and are fluid. The fabrics used in the present invention and which mainly characterize the present invention include polyester, vinylon, polypropylene, acetate rayon, acrylic,
Fabrics made of fibers that can be dyed with disperse dyes, such as synthetic fibers such as nylon, or the combination of these different fibers or these fibers with other fibers, such as natural fibers such as cotton, wool, silk, and linen. These fabrics are blended with fibers, and have an ink-receiving layer made of a hydrophilic resin liquid that can quickly and easily absorb and receive the ink for the inkjet method used on the surface of these fabrics, and the temperature of the ink-receiving layer at 25°C It is adjusted to have a viscosity of 1000 cp or more and fluidity. By forming a layer having such performance and physical properties on the textile material to be printed, the present inventor has achieved the following:
The present invention was completed based on the finding that the above-mentioned drawbacks of the prior art, particularly the problems caused by the use of low viscosity, aqueous ink in the inkjet method, 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 albumin, gelatin, casein, starch, cationic starch, gum arabic, and sodium alginate. natural resins, water-soluble polyamide, polyacrylamide, polyvinylpyrrolidone, quaternized polyvinylpyrrolidone, polyethyleneimine, polyvinylpyridylium halide, melamine resin, polyurethane, carboxymethylcellulose, polyvinyl alcohol, cationically modified polyvinyl alcohol,
Examples include synthetic resins such as water-soluble polyester and sodium polyacrylate, and one or more of these materials 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 or NBR may be added as necessary.
Resins such as latex, polyvinyl formal, polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile, polyvinyl chloride, polyvinyl acetate, phenolic resin, and alkyd resin may be 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 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 performed in advance before printing, or may be performed 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 printed, but if it is 0.1 μm or more,
It is not particularly limited. Practically speaking, 0.5
A range of ~30 μm is preferred. In addition, the ink receiving layer formed in this way is
When forming the receptive layer as described above, rather than keeping it completely dry during printing,
When printing contains a certain amount of moisture and therefore has a certain degree of fluidity,
The absorption of the ink is very rapid, making continuous printing methods possible in particular. For example, before entering an inkjet printing device, the resin liquid is continuously applied to the fabric to be printed, and this is entered into the printing device in an incompletely dry state to be printed, and then wound onto a winding roll or the like. be able to. According to the inventor's detailed research, it has been found that the ink has such an excellent ink absorption speed, the ink does not bleed, and the ink does not adhere to other objects even when wound up into a roll or stacked on top of each other. The ink-receiving layer has a moisture content of approximately 80% by weight or less, and a viscosity at 25°C.
It has been found that it is more than 1000 cp, preferably about 3000 to 15000. Also, if the water content exceeds 80% by weight or the viscosity at 25℃ is less than 1000 cp,
It has also been found that the applied ink bleeds or adheres to other surfaces, making continuous operation difficult. The moisture content or fluidity of the ink receiving layer can be easily adjusted by controlling the drying of the applied hydrophilic resin liquid. Furthermore, in order to improve ink absorption, these ink-receiving layers contain, for example, silica, clay, etc.
Talc, diatomaceous earth, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, synthetic zeolite, alumina, participating zinc, lithopone,
Fillers such as Sachin White can also be dispersed. By forming an ink-receiving layer with a specific fluidity on the surface of fabrics as described above, when ink is applied to these fabrics by an inkjet method, the applied ink, especially its aqueous medium, Since the ink dots are absorbed into the ink-receiving layer within a few seconds, the ink dots do not excessively bleed onto the fabric, and therefore accurate printing 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. Therefore, continuous operation is possible, and storage in any form is possible 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 do not absorb much water-based ink, and furthermore, due to the presence of the texture of the fabric,
The applied inkjet caused excessive bleeding, 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 method ink used in the method of the present invention, any conventionally known disperse dye can be used, but particularly preferred ones include CI Disperse Yellow 3, 4, 5,
7, 9, 13, 24, 30, 33, 34, 42, 44, 49, 50,
51, 54, 56, 58, 60, 63, 64, 66, 68, 71, 74,
76, 79, 82, 83, 85, 86, 88, 90, 91, 93, 98,
99, 100, 104, 114, 116, 118, 119, 122, 124,
126, 135, 140, 141, 149, 160, 162, 163, 164,
165, 179, 180, 182, 183, 186, 192, 198, 199,
202, 204, 210, 211, 215, 216, 216, 224; CI
Dispers orange 1, 3, 5, 7, 11, 13,
17, 20, 21, 25, 29, 30, 31, 32, 33, 37, 38,
42, 43, 44, 45, 47, 48, 49, 50, 53, 54, 55,
56, 57, 58, 59, 61, 66, 71, 73, 76, 78, 80,
89, 90, 91, 93, 96, 97, 119, 127, 130, 139,
142; CI Dispersed 1, 4, 5, 7,
11, 12, 13, 15, 17, 27, 43, 44, 50, 52, 53,
54, 55, 56, 58, 59, 60, 65, 72, 73, 74, 75,
76, 78, 81, 82, 86, 88, 90, 91, 92, 93, 96,
103, 105, 106, 107, 108, 110, 111, 113, 117,
118, 121, 122, 126, 127, 128, 131, 132, 134,
135, 137, 143, 145, 146, 151, 152, 153, 154,
157, 159, 164, 167, 169, 177, 179, 181, 183,
184, 185, 188, 189, 190, 191, 192, 200, 201,
202, 203, 205, 206, 207, 210, 221, 224, 225,
227, 229, 239, 240, 257, 258, 277, 278, 279,
281, 288, 296, 303, 310, 311, 312, 320, 324,
328; Disperse Violet 1, 4, 8, 23,
26, 27, 28, 31, 33, 35, 36, 38, 40, 43, 46,
48, 50, 51, 52, 56, 57, 59, 61, 63, 69, 77;
CI Daspers Green 9; CI Daspers Brown 1, 2, 4, 9, 13, 19; CI Daspers Blue 1, 3, 7, 9, 14, 16, 19, 20,
26, 27, 35, 43, 44, 54, 55, 56, 58, 60, 62,
64, 70, 72, 73, 75, 79, 81, 82, 83, 87, 91,
93, 94, 95, 96, 102, 106, 108, 112, 113,
115, 118, 120, 122, 125, 128, 130, 139, 141,
142, 143, 146, 148, 149, 153, 154, 158, 165,
167, 171, 173, 174, 176, 181, 183, 185, 186,
187, 189, 197, 198, 200, 201, 205, 207, 211,
214, 224, 225, 257, 259, 267, 268, 270, 284,
285, 287, 288, 291, 293, 295, 297, 301, 315,
330, 333; CI Dispers Black 1, 3,
10, 24; Kayaseron Red E-GL, Kayaseron Blue E-TB, Kayaseron Navy Blue E-
EX, Kayaseron Black E-EX, 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 ~10% 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 finally 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 printing, and problems may occur 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 can be obtained by a simple dissolving action such as heating. The essential components of the ink composition used in the present invention are as described above, in addition to various conventionally known dispersants, surfactants, viscosity modifiers, surface tension modifiers,
Other types of dyes and the like can be added as necessary. For example, viscosity modifiers such as polyvinyl alcohol, celluloses, and water-soluble resins; various cationic, anionic, or nonionic surfactants; surface tension modifiers such as diethanolamine and triethanolamine; PH modifiers using buffer solutions; Examples include fungicides and the like. Further, in order to prepare ink used in an inkjet recording method of the type in which the ink is charged, resistivity adjusters such as inorganic salts such as 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 release the ink composition from the nozzle and apply the ink to the fabric, which is the projectile. For example, things are
IEEE Trans actions
on Industry Applications) Vol.IA−13, No.1
(February/March 1977 issue), Nikkei Electronics
April 19, 1976 issue, January 29, 1973 issue and 1974
It was published in the May 6th issue. The methods described in these are suitable for the textile printing method of the present invention,
To explain some of them, there is the electrostatic suction method. In this method, a strong electric field is applied between the nozzle and an accelerating electrode placed several mm in front of the nozzle, and the ink is pulverized from the nozzle and released one after another. There is a method in which an information signal is applied to the deflection electrodes while the drawn ink composition flies between the deflection electrodes for recording, and a method in which ink particles are ejected in response to the information signal without deflecting the ink particles. All of them 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 using a small pump and mechanically vibrating the nozzle with a crystal oscillator. Simultaneously with injection, it is charged according to an 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 appropriate values, and two types of ink droplets, large and small, are ejected from the nozzle tip. is generated, and only these medium- and small-diameter 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 undergoes a rapid volume change when subjected to the action of thermal energy, and the acting force due to this change in state 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, ink dots attached to the fabric are quickly absorbed and retained in the ink-receiving layer of the fabric before they bleed excessively. It becomes dry-like in a few seconds and can be operated continuously, allowing immediate stacking and winding. 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 ink and the use of hydrophobic fabrics. . 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, but common methods include steaming with superheated steam, heat treatment with warm or hot water, dry heat treatment, and surfactant. Appropriately select from soaping treatment with an aqueous 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 Examples. Note that the numbers in the middle of the sentence and % are based on weight. Example 1 Ink (A) Disperse dye (CI Dispersed 11) 3.0 parts Nonionic surfactant (Product name Rheodol TW
-L120, manufactured by Kao Soap Co., Ltd.) 0.5 parts Ethylene glycol 30 parts Water 65 parts After mixing all the above ingredients and thoroughly dispersing them, filter through a filter with a pore size of 10 μm to remove coarse particles. Ink (A) was obtained. Receptive layer liquid (A) Kuraray Poval 117 (manufactured by Kuraray Co., Ltd., polyvinyl alcohol) 10 parts Polyvinylpyrrolidone 20 parts Water 70 parts Mix all the above ingredients and dissolve them uniformly to prepare the receptor layer liquid.
I got (A). The viscosity of this receptor layer liquid (A) at 25°C was about 2200 cp. Polyester in receptor layer liquid (A)
After soaking the 100% white fabric, it was gently squeezed to remove excess receptor layer solution. After overlaying this with commercially available report paper to make it easy to install in a printer, immediately install an inkjet printer using a piezo element (manufactured by Canon Inc., nozzle size 65 μm).
φ, 4 nozzles) to apply ink onto the fabric cotton.
A predetermined test pattern was printed in (A). Next, fixation was performed using a steamer, and then soaping treatment was performed to obtain a fabric print (A) using an inkjet printer. Example 2 Ink (B) Disperse dye (CI Disperse Blue 58) 4 parts Demol N (anionic surfactant, Kao Soap Co., Ltd.)
manufactured by Naphthalene Sulfonic Acid Formalin Condensate)
2 parts diethylene glycol 25 parts water 70 parts Ink (B) was obtained in the same manner as ink (A) of Example 1 from all the above ingredients. Receptive layer liquid (B) ADEKA Polyether SC-800 (manufactured by Asahi Denka Kogyo Co., Ltd.)
propylene oxide adducts)
50 parts water 50 parts The above components were mixed to prepare a receptor layer solution (B). The receptor layer solution (B) was applied to a dress fabric made of 60% polyester and 40% cotton using a bar coater, and then dried with hot air at 80° C. for 1 hour to obtain a fabric for printing. The viscosity of the ADEKA polyether SC-800 used at 25°C was about 15,000 cp. The inkjet printer PJ-1080A (Canon) uses piezo elements on the printer fabric mentioned above.
Printing was carried out with ink (B) using a nozzle (manufactured by Co., Ltd., nozzle size 65 μm, number of nozzles: 4). Thereafter, the fabric was dyed by ironing, and the fabric was washed with a neutral detergent to obtain a print (B). Comparative Example 1 A print (C) was obtained in exactly the same manner as in Example 1, except that the following receptor layer liquid (C) was used instead of the receptor liquid (A). Receiver layer liquid (C) Polyethylene glycol 300 30 parts Glycerin 60 parts Water 10 parts The viscosity of this receptor layer liquid (C) at 25℃ is approximately 600 cp
It was hot. Comparative Example 2 A pudding (D) was obtained in exactly the same manner as in Example 2, except that the receiving layer liquid (D) shown in Example 2 was used instead of the receiving layer liquid (B). Receptive layer liquid (D) Neugen ET127 (manufactured by Daiichi Kogyo Seiyaku Co., Ltd., polyoxyethylene alkyl ether) 50 parts Water 20 parts The viscosity of the used Neugen ET127 at 25°C was about 800 cp. The results of evaluation of each print of each fabric of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1 below. 【table】

Claims (1)

[Claims] 1. In a textile printing method in which a recording liquid containing a disperse dye is applied to a fabric made of synthetic fibers or a blended fabric of synthetic fibers and natural fibers by an inkjet method, and then dyed, the recording liquid is applied to the fabric. The viscosity at 25°C is
A printing method characterized in that the printing method is carried out after forming a recording liquid receiving layer having a fluidity of 1000 cp or more.