JP2001098474A - Ink jet printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet printing device which can express brilliant color tones and clear designs. SOLUTION: This ink jet printing device is provided with a printing portion having ink jet nozzles for extruding dying inks on a fabric, a fabric-feeding portion for feeding the fabric to the side of the printing portion and a drying portion for drying the fabric printed in the printing portion. Therein, mutually independent printing portions in the same number as the number of dyes to be used are arranged, and drying portions are further arranged on the downstream sides of the printing portions, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing apparatus using an ink jet system.

[0002]

2. Description of the Related Art Conventionally, screen printing, roller printing, rotary screen printing, transfer printing, and the like have been used as a method of printing a pattern on a cloth. It is necessary to prepare engraving rollers, transfer paper, and the like, and the production of these screen frames, engraving rollers, and transfer paper is quite expensive, so that it is uneconomical to produce a considerable number of lots. It has the drawback that it cannot respond quickly to diversification, and in order to solve these drawbacks, a technology has been developed that reads samples with a scanner, performs image processing with a computer, and prints the results with an inkjet method. It has been.

FIG. 2 shows an embodiment of a conventional textile printing apparatus using an ink jet system. First, the fabric supply unit (5)
The cloth (2) to be printed sent from the printer is transferred in the direction of the downstream printing section (6), and the dye ink is fed from the running inkjet nozzle (7) based on a digital signal transmitted from a workstation or the like. Discharge and apply to fabric (2).

Thereafter, the cloth (2) is dried to a desired moisture content by passing through a drying section (8), and finally collected by a cloth collecting means (9) such as a take-up roller. . The fabric (2) to which the dye ink has been applied in this manner is then supplied to a color fixing unit such as a moist heat treatment device generally used in a dyeing / printing process, and after passing through a color forming / fixing step, After being washed and finished, it becomes a product.

In the above-mentioned ink jet printing, a dye ink is generally required to have a total of four basic colors of cyan (C), magenta (M) and yellow (Y) plus black (K) as basic colors. Interpolated colors such as orange, violet, green, etc. may be used according to the printing quality,
Light colors such as light cyan, light magenta, light yellow, and gray have been used.

The dye ink is set in an independent container for each color, and supplies the requested color dye ink to the ink jet nozzle based on the digital image signal. For example, if the desired color is green, and this is cyan, magenta,
In the case of printing using a total of four dye inks of yellow and black, cyan and yellow dye inks are supplied to inkjet nozzles, and these are ejected from individual nozzles almost simultaneously and almost at the same place on the fabric. Green is expressed by forming dots.

However, in the case of such an ink-jet printing apparatus, dye inks of different colors are discharged almost simultaneously and almost at the same place on the cloth in the printing section as described above. Different dye inks in high state are mixed with each other, and the color tone becomes blurred,
Further, there is a problem that the outline of the pattern becomes unclear.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an ink jet printing apparatus capable of expressing a clear color tone and a clear pattern. is there.

[0009]

The above object is achieved by the following means.

First, a first aspect of the present invention provides a printing section having an ink jet nozzle for discharging a dye ink onto a fabric,
In an ink jet printing apparatus including a fabric supply unit for supplying a fabric to the printing unit side and a drying unit for drying the fabric printed in the printing unit, the number of colors of the dye ink used in the printing unit is the same as the number of colors. And a drying section provided downstream of each printing section.

According to a second aspect of the present invention, there is provided the ink jet printing apparatus according to the first aspect, wherein at least four or more parts including a yellow printing section, a magenta printing section, a cyan printing section, and a black printing section are provided. It has a printing section, and a plurality of these printing sections are arranged in order of a black printing section, a cyan printing section, a magenta printing section, and a yellow printing section from the upstream in the fabric traveling direction.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an example of a specific embodiment of the present invention will be described.

First, as shown in FIG. 1, the ink jet printing apparatus (1) of the present invention includes a plurality of printing sections (3) each having an ink jet nozzle for discharging a dye ink onto the cloth (2) as described above. The number of the printing units is the same as the number of colors of the dye ink to be used, and a drying unit (4) is further provided downstream of each printing unit (3) in the fabric advancing direction.

For example, when three kinds of dye inks of dye 1, dye 2 and dye 3 are used, dye 1 printing section (3a) which discharges only one of dyes 1 to 3 respectively, dye 2 The printing section (3b) and the dye 3 printing section (3c) are arranged along the traveling direction of the cloth (2) sent out from the cloth supply section (5), and the drying section (4) is arranged downstream thereof. The configuration is as follows.

In order to obtain better clarity and clarity, at least the above four dye inks of yellow (Y), magenta (M), cyan (C) and black (K) must be used. And the arrangement of the printing section (3) is changed from the upstream in the fabric advancing direction to the black printing section, the cyan printing section,
It is important to order the magenta printing section and the yellow printing section in this order.

In particular, when excellent clarity is required in terms of color clarity and pattern clarity, at least yellow (Y), magenta (M), cyan (C), black It is preferable to use four color dye inks of (K). When a light color dye ink such as light yellow, light magenta, light cyan, or gray, or an interpolation color such as violet, orange, or green is used, a hue that can be expressed is used. The range can be expanded.
Even when the interpolation colors are used in this manner, the printing unit that discharges the four color dye inks of (Y), magenta (M), cyan (C), and black (K) as described above, It is preferable that the black printing section, the cyan printing section, the magenta printing section, and the yellow printing section are arranged in this order from upstream in the fabric advancing direction.

The ink jet method used in the present invention is a bubble jet method in which a heating resistor element is embedded in a nozzle, the ink is boiled by the heat generated, and the ink is ejected by the pressure of the bubbles. An electric signal is applied to the piezoelectric element. The pulse jet method, which extrudes the ink particles by exciting the volume change of the ink chamber by deforming the ink chamber, pressurizes and continuously ejects the ink from the nozzle which is ultrasonically vibrated to turn it into particles, and controls the particles to the charged amount. Deflects through
An example is a charge control method in which recording is performed separately for recording and non-recording particles.

[0018]

Embodiments will be described below with reference to embodiments. First, as a cloth, a cotton plain woven fabric having a warp density of 110 yarns / inch and a weft density of 155 yarns / inch consisting of a warp 40th single yarn and a weft 40th single yarn (English cotton count) is baked and desizing in a usual manner. , Scouring,
Bleaching and mercerizing were performed, and then pretreatment for preventing bleeding was performed using a water repellent.

Subsequently, using a printing apparatus in which four independent printing sections are arranged in the order of black printing section, cyan printing section, magenta printing section, and yellow printing section from the upstream in the fabric advancing direction, the above four printing sections are used. The inks of the following formulas were respectively mounted on tanks for supplying printing ink to the printing section.

(Yellow printing part) CIReactive Yellow 2 20.0% by weight Water 80.0% by weight (Magenta printing part) CIReactive Red 24 20.0% by weight Water 80.0% by weight (Cyan printing part) CIReactive Blue 49 20.0% by weight Water 80.0% by weight (black printing part) CIReactive Black 1 20.0% by weight Water 80.0% by weight

In the above printing apparatus, a drying section is provided downstream of each of the black printing section, cyan printing section, magenta printing section, and yellow printing section, and the drying section is operated at 120 ° C. for 90 seconds. Dried. That is, in the present textile printing apparatus, the process goes through a process of applying a black dye ink → drying → applying a cyan dye ink → drying → applying a magenta dye ink → drying → applying a yellow dye ink.

After repeating the steps of applying and drying the dye ink in this way, it is put into a moist heat device, and is usually fixed and colored by a known method, followed by washing and washing.
After drying, the printed fabric of Example 1 was obtained.

Next, an ink jet printing apparatus having a black dye ink discharge nozzle, a cyan dye ink discharge nozzle, a magenta dye ink discharge nozzle, and a yellow dye ink discharge nozzle in one printing section, and a dye tank linked to each nozzle is used. Was equipped with a dye ink having the following formulation.

(Yellow dye ink discharge nozzle) CIReactive Yellow 2 20.0% by weight water 80.0% by weight (magenta dye ink discharge nozzle) CIReactive Red 24 20.0% by weight water 80.0% by weight (cyan dye Ink discharge nozzle) CIReactive Blue 49 20.0% by weight Water 80.0% by weight (Black dye ink discharge nozzle) CIReactive Black 1 20.0% by weight Water 80.0% by weight

The pretreated cloth is supplied to this apparatus, and based on digital data transmitted from the computer to the textile printing apparatus, each nozzle is appropriately controlled to discharge a desired dye ink to give a textile print. did. Thereafter, the fabric was dried at 120 ° C. for 90 seconds, colored and fixed in the same manner as the printed fabric of Example 1, and then washed and dried to obtain a product of Comparative Example 1.

When the product of Example 1 and the product of Comparative Example 1 thus obtained were compared, the product of Comparative Example 1 showed bleeding at the color boundary, and a plurality of colors were mixed to give a clear color tone and Although the pattern was inferior to the product of Example 1 in the clarity of the design, the product of Example 1 was excellent in sharpness and clarity.

[0027]

As described above, according to the ink jet printing apparatus of the present invention, it is possible to obtain a clear and clear printed fabric.

[Brief description of the drawings]

FIG. 1 is a schematic view illustrating an inkjet printing apparatus of the present invention.

FIG. 2 is a schematic view showing a conventional ink jet printing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ink jet printing apparatus 2 Fabric 3 Printing section 4 Drying section 5 Fabric supply section 6 Printing section 7 Inkjet nozzle 8 Drying section 9 Fabric collection means

Claims (2)

[Claims] 1. A printing section having an ink jet nozzle for discharging a dye ink onto a cloth, a cloth supply section for supplying the cloth to the printing section, and a drying section for drying the cloth printed in the printing section. An ink-jet printing apparatus, comprising: an ink-jet printing apparatus provided with the same number of colors of dye inks as used, each including an independent printing section, and a drying section provided downstream of each printing section. 2. It has at least four or more independent printing parts including a yellow printing part, a magenta printing part, a cyan printing part and a black printing part, and the four printing parts are black from the upstream in the fabric advancing direction. 2. The ink jet printing apparatus according to claim 1, wherein a printing section, a cyan printing section, a magenta printing section, and a yellow printing section are arranged in this order.