JPS61138784A - Printing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the production of synthetic fibers and/or
Or, it relates to a method of printing fabrics made of semi-synthetic fibers (hereinafter simply referred to as synthetic fibers), and more specifically, to a printing method using an inkjet method characterized by using fabrics having a specific configuration.

(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 textile printing method using an inkjet recording method has also been proposed.

(The problem that the invention is trying to solve) However,
Conventional general textile printing methods require the creation of printing plates for printing, and the creation of these plates, such as printing plate cylinders and screen plates, is expensive, and transfer paper is also required for printing in transfer printing. The production of plates for this is expensive, so it is not cost-effective unless a large quantity is produced, and
In general, the fashion period of printed cloth patterns is short, so making plates each time increases the cost, and there is a serious problem that it is not possible to respond quickly to trends, and a large amount of inventory may be required. Inkjet printing was also proposed to solve these drawbacks, but the Ink Genie.

In printing using this method, high viscosity recording liquid (ink) such as conventional printing paste cannot be used, and the ink is water-based.
Due to various reasons such as synthetic fibers hardly absorbing water-based inks, when printing on woven fabrics, etc., the applied ink easily bleeds due to the lack of ink absorption of woven fabrics and the presence of textures. It is difficult to form a unique printed pattern, so even if the dye is dyed after printing,
It was not possible to form a sharp pattern, and the dye retention rate was also poor.

Therefore, an object of the present invention is to solve the above-mentioned economic problems in the conventional general textile printing method, the problem of not being able to obtain accurate prints in the textile printing method using inkjet recording, and the problem of low dye dyeing rate. It is an object of the present invention to provide a textile 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 as described below.

(Disclosure of the Invention) That is, the present invention provides a textile printing method in which a recording liquid containing a disperse dye is applied to fabrics made of synthetic fibers and/or semi-synthetic fibers by an inkjet method, and then dyed. This printing method is characterized in that a receiving layer for receiving the recording liquid is formed on the fibers constituting the fabric.

To explain the present invention in more detail, 1. The main feature of the present invention is that in a printing method using an inkjet method, a recording liquid of an inkjet method 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 polyester, vinylon, polypropylene,
Fabrics made of fibers that can be dyed with disperse dyes, such as synthetic fibers such as acrylic and nylon, and semi-synthetic fibers such as acetate and triacetate, or the combination of these different fibers or their m! I and other fibers, such as cotton,
Blended fabrics with fibers of natural fibers such as wool, silk, hemp, etc., where these fabrics or the fibers constituting these fabrics can quickly and easily absorb and receive the ink for the inkjet system used. It is made up of layers.

By forming a layer with such performance on fabrics, which are printing materials, the present inventors have found that the above-mentioned drawbacks of the prior art, especially the problems caused by the use of low viscosity and water-based ink in the inkjet method, can be easily solved. The present invention was completed by discovering that this is the case.

Preferred materials for forming the above-mentioned receptor layer are:
is a water-soluble or hydrophilic natural or synthetic polymer;
Preferred specific examples include natural compounds such as wheat flour, rice flour, rice bran, funoori, albumin, gelatin, casein, starch, cellulose, gum arabic, chili pepper gum, locust bean gum, sodium alginate, and bentonite, and their modified products and chemical reaction derivatives. , water-soluble polyamide, polyacrylamide, quaternized polyvinylpyrrolidone, polyethyleneimine, polyvinylpyricillium halide, melamine resin, polyurethane, polyvinyl alcohol, water-soluble polyester, polysodium acrylate, and other synthetic resins, as well as their modified products and derivatives. given,
One or more of these materials may be used as desired.

Furthermore, in order to strengthen the ink-receiving layer and/or improve the r:H properties with the base material, SBR latex, NBR latex, polyvinyl formal, polymethyl methacrylate, polyvinyl butyral, polyacrylonitrile, polyester, etc. may be used as necessary. vinyl chloride, polyvinyl acetate,
Resins such as phenol resins and alkyd resins 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, for example, by a dipping method, a spray 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 processing is
It may be carried out on the yarn before weaving or on the R male and then woven afterwards, or it may be carried out on the fabric after weaving.

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 capable of receiving ink, and although it depends on the amount of ink to be recorded, it is not particularly limited as long as it is 0.1 pm or more. Practically speaking, a range of 0.5 to 30 JLm is suitable.

By forming an ink-receiving layer on the surface of fabrics or fibers constituting the fabrics as described above, when ink is applied to these fabrics by an inkjet method, the applied ink, especially its aqueous medium, will last for 3 minutes. Since the ink dots are absorbed into the ink-receiving layer within a certain amount of time, the ink dots do not excessively bleed onto the fabric, and therefore, accurate printing and 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. It 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 hardly absorb 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 particularly preferred ones are C, 1, Disbird's Yellow 5, 42.56.64.76.79. 83.10
0.124.140.160.162.163,164
．． 165°186.192,224. C, I, Disbirds Orange 13.29.30.31.33,43°49,50. 55. 61, 73, 78, 119
;C, 1, Disbirds Red 43, 54.56.72
．． 73.78.88.91.92.93.103.11
1.113.126.127.128.135.143
．． 145.152.153゜154.164.181.
188.189, 192.203.205.206.2
07.221.224.225.227.257.25
8.288.29B, C, 1, Disverse Violet 27.35.38.46.52.56; C, I.

Disperse Brown 1.9; C, 1, Disperse Blue 54.60.73.87.94.113.128,
139.142.143.146.148.149.1
58.167.176.183.186,187,19
7,198,201゜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 forms of vat dyes, soluble architectural dyes, reduced forms of 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 to be used include alkyl alcohols having 1 to 4 carbon atoms, such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, 5ec-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 groups such as glycol, triethylene glycol, 1,2゜6-hexandriol, thiodiglycol, hexylene glycol, diethylene glycol, etc.
Alkylene glycols containing 6 carbon atoms: glycerin: lower alkyl ethers of polyhydric alcohols such as ethylene glycol methyl (or ethyl) ether, diethylene glycol methyl (or ethyl) ether, triethylene glycol monomethyl (or ethyl) ether; Examples include N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, and the like.

The above-mentioned media can be used alone or as a mixture, but
The most preferred medium composition consists of water and one or more water-soluble organic solvents, where the water-soluble solvent contains at least one water-soluble high-boiling organic solvent, such as a polyhydric alcohol such as ethylene glycol, propylene glycol, or glycerin. It contains. The amount of these media used is such that when the ink composition is prepared, the content of the disperse dye is approximately 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,
In addition, it is common to obtain a final pH of 4 to 10, and the particle size of the disperse dye is usually 304 m or less, preferably 204 m or less.If the particle size is too large, the nozzle eye during inkjet recording Problems such as clogging may occur, and problems may occur with level dyeing in the subsequent dyeing process. Also,
When a medium that dissolves the disperse dye is selected as the medium, the ink composition of the present invention can be obtained only by the dissolving action of 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 esters, polyoxyethylene sorbitan fatty acid esters , polyoxyethylene alkylamine, glycerin fatty acid ester, oxyethylene oxypropylene block copolymer, and other 7-ion type dispersants or surfactants are important.

As the viscosity modifier, mainly water-soluble natural or synthetic polymers such as carboxymethyl cellulose, sodium polyacrylate, polyvinylpyrrolidone, gum arabic, and starch are preferred, and using these viscosity modifiers,
Alternatively, the viscosity of the ink composition of the present invention may be reduced to 2.
It is 50 cps or less, preferably 1 to 10 cps at 5°C.

In addition to the above-mentioned three types of additives, for example, antifoaming agents, penetrating agents, antifungal agents, pH adjusters, etc. can be added as appropriate.

Further, in order to prepare ink used in an inkjet recording method of the type in which the ink is charged, a resistivity adjusting agent such as inorganic salts such as lithium chloride, ammonium chloride, and sodium chloride is added. Note that when applied to an inkjet system in which ink is ejected by the action of thermal energy, thermal physical property values (eg, 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 (+977 yen - February and March issue) and Nikkei Elect O-kus 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 suction method. A method in which a strong electric field is applied between the ink composition and the accelerating electrode, the ink particles are drawn out from the nozzle one after another, and while the drawn ink composition is flying between the deflection electrodes, an information signal is given to the deflection electrodes for recording. There is a method in which ink particles are ejected in response to an information signal without deflecting the ink particles.1. All are effective in the textile printing method of the present invention.

The second method is to apply high pressure to the ink with a small pump and mechanically vibrate the nozzle with a crystal oscillator, etc. to forcibly eject minute ink particles, and the ejected ink particles 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 droplets, large and small, are produced 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 nozzle diameter that is larger than conventional methods.

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, there is a method described in Japanese Patent Application Laid-Open No. 54-51837↑, an inkjet method in which ink subjected to the action of thermal energy causes a sudden change in volume, and the acting force due to this change in state causes the ink to be ejected from a nozzle. 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 a colored ink composition 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, and within three minutes after printing, the product is in a state similar to drying, allowing it to be stacked or rolled up immediately.

Therefore, a clear and fine pattern can be formed even through a subsequent dyeing step 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 absorbed by the ink-receiving layer on the surface of the fabric. Therefore, it is preferable to carry out dyeing treatment such as heat treatment.Such dyeing treatment varies depending on the dye used and the type of fabric, but the general method is superheated steam dyeing. An appropriate method is selected from among steaming treatment, heat treatment with warm water or hot water, dry heat treatment, soaping treatment with an aqueous surfactant solution, etc. By such a dyeing treatment, 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.

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. It is possible to respond to changes in fashion from time to time without requiring expensive plates as in the prior art. Therefore, it is not possible to secure sufficient profits even with small-scale production without mass production as in the prior art. Furthermore, 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 (C, R, Disperse Blue 187) 5 parts Anionic surfactant (dispersant) 4 parts (Demol N manufactured by Kao Soap ■) Ethylene glycol 15 parts Diethylene glycol 13 parts Water
65 parts After dispersing all the above ingredients in an alumina ball mill for about 36 hours, the pH was adjusted to 8.3 with sodium hydroxide, and further dispersion was carried out for 3 hours in an alumina ball mill.
Thereafter, coarse particles with a particle size of 10 μm or more were removed using a Fluorobore filter FP-tooo (manufactured by Sumitomo Electric Industries, Ltd.) to obtain an aqueous ink (A) of the present invention.

Ink production example 2 Disperse dye (C, 1, Disbirds Yellow 7B) 5 parts Anionic surfactant 4 parts (Ionet D-2, manufactured by Sanyo Chemical Industries, Ltd.) diethylene glycol
15 parts triethylene glycol monomethyl ether 10 parts water
70 parts All the above ingredients were milled in an alumina ball mill to approx.
After dispersing for 6 hours, adjust the pH to 7.6 with potassium hydroxide, further dispersing for 2 hours with a homogenizer, and then centrifuge to remove coarse particles to obtain aqueous ink (B). Obtained.

Ink production example 3 Disperse dye (C, I. Disbirds Red 11) 4 parts Anionic surfactant 0.5 parts, Kukkor 0TP-100s, manufactured by B Hikari Chemicals ■) Anionic surfactant 1.5 parts (Thymol C1 (manufactured by Kao Soap ■) Nonionic surfactant 0.2 parts (Emulgen 911, manufactured by Kao Soap ■) ISO-propyl alcohol 0.5 parts Propylene glycol 15 parts Polyethylene glycol 5 parts Water
75 parts.

After dispersing all the above components in an alumina ball mill for about 40 hours, the pH was adjusted to 7.4 with potassium hydroxide, and dispersion was further carried out for 2 hours. Coarse particles with a particle size of 54 m or more were removed using a water-based ink (C) (manufactured by 1).

Ink-receiving layer preparation example 1 Locust bean rubber 0.2 parts Polyvinyl formal 0.05 parts Water
99. 75 parts All of the above ingredients were stirred for one day and night, then boiled and cooled to obtain a prepared liquid.

A fabric to be printed was treated with this prepared solution 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 Carboxymethylcellulose 0.1 part Polyvinyl acetate
0.1 part water
Using 98.8 parts above, an ink-receiving layer was formed on a fabric to be printed in the same manner as in Preparation Example 2.

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 is done using a printer that uses piezo elements (nozzle diameter 6).
Printing was carried out using a printer with a diameter of 5 mm, PJ-108OA, manufactured by #-Yanon ■, and then a fixed R (dyeing) process was carried out. Thereafter, the print was washed with water to remove the receptor layer, and after drying, the hanging position of the print was visually determined.

Comparative Example When similar printing was carried out without an ink-receiving layer using the combinations shown in Table 1 below, the results showed that when an ink-receiving layer was provided, the density, color tone, strike-through, and edge sharpness were particularly good. The results were poor in comparison.

-m-view-you” & Niken, i ヱ
Ink A
Ink B Ink C Georgette
Broad Broadeny LS] 1 layer
Preparation Example 1 Preparation Example 2 Preparation Example 1
Good degree
Good color tone book good
Good color uneven book
Good Good Good
Book Almost none Almost none Almost none Sharpness of edges Fairly good Good
Common Sense-” Record-” L” Oriyoshi
Yoshiki Yoshiki Each evaluation was made by printing a solid print of about 2×2 crrr' and a line of about 1 fin in width and about 20 cm in length on cloth using a printer.

Claims (1)

[Claims] (1) In a printing method in which a recording liquid containing a disperse dye is applied to fabrics made of synthetic fibers and/or semi-synthetic fibers by an inkjet method, and then dyed, the fabrics or the fibers constituting the fabrics are A textile printing method characterized in that a receptor layer is formed to receive the recording liquid.