JPS6076343A - Ink jet dying - Google Patents

Abstract

PURPOSE:To form a sharp-appearance pattern on fabric by transferring dying ink of less than 200cps and dye on fabric after depositing them on a smooth-surface without affinity for dye and non-permeable endless supporter by an ink jet method. CONSTITUTION:Drops of dying ink to fly from a nozzle 1 of an ink jet settles on a stainless steel cylinder 2 of an endless supporter. The cylinder 2 turns clockwise at low speed to remove main solvent in dying ink such as water by a preheater 3. Dying ink on the cylinder 2 after removal of the main solvent is placed on fabric 4 at a tension roller 6 and then a dye in the dying ink is transferred to fabric by a heat treating heater 5 and is finally wound up by 4'. Residue in the dying ink remaining on the cylinder 2 is removed by a brush and again the dying ink is deposited through the nozzle 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a method of forming sharp patterns on fabrics by using an inkjet method.

(Prior art and its problems) Conventionally, hand printing, roller printing, screen printing, and transfer printing have been adopted as methods for forming patterns on fabrics, but all of them involve a screen with a pattern formed in advance, an engraving roller, and a transfer printing method. It is necessary to prepare paper, and the cost and time loss for this has become a bottleneck. In recent years, in the field of paper printing, a printing method based on Infusiera has been developed and partially put into practical use. In order to form clear prints on paper, various improvements have been made to the ink's viscosity, surface tension, and paper material to achieve appropriate ink penetration into the paper.Using the inkjet method. Pattern formation requires time and expense in advance by combining the pattern reading mechanism and computer with a screen,
Because there is no need to prepare an engraving roller or transfer paper, it is possible to
It is also attracting attention in the M field. Attempts have been made to apply inks and devices designed for paper to textiles, but sharp designs cannot be formed. This is due to the fact that when paper inkjet ink is injected onto fabric, the liquid spreads along the fibers and threads that make up the fabric due to the capillary phenomenon, resulting in the so-called ink bleeding phenomenon. be. In the case of printing on paper, it is possible to limit the material of the paper to J''' to obtain sharp prints, but in the case of fabric, it is possible to limit the material to J''', which can be used for a wide variety of purposes. In reality, it is impossible to limit the variety.In this way, the ink for Infusiera 1~ smudges on the fabric, and the inability to form sharp patterns is a fatal problem when applying the inkjet method to fabric. It was said that

I came up with the idea of increasing the viscosity of the ink to reduce this ink bleeding, but in order for the ink to fly out of the nozzles of various inkjet methods, it is necessary to use a paste-like high-viscosity paste like that used in normal textile printing. You can't use anything at all; you can only use things with extremely low viscosity. Therefore, there are limits to the means of adding a viscosity modifier to ink. Another method is to jet ink onto a long piece of paper, such as the transfer paper used in normal transfer printing, then place the fabric in close contact with the paper, heat transfer the dye, roll up the paper and fabric together, and then peel them off. There is. In this case, paper of the same color as the fabric is required, which is disposable, and dye remains on the paper after processing, which is very wasteful (and poses a bottleneck in terms of cost).

This method is simply a combination of creating transfer paper for transfer printing using an inkjet method rather than gravure or offset printing, and continuously dyeing the fabric using a conventional transfer printing device, and is a rational method. I can't say it's a good method.

(Objective of the Invention) The present inventors have conducted intensive studies on a technique for dyeing patterns for fabrics that is unprecedented and innovative, and have arrived at the present invention.

The present invention applies a paper printing nozzle mechanism to fabrics so that sharp patterns can be formed on any fabric, and also provides a rational dyeing method without using disposable transfer paper. It is something.

(Structure of the Invention) Dyeing 11 ink with a viscosity of 200 cps or less is applied by an inkjet method (=l) onto a non-permeable endless carrier with a smooth surface that has no affinity for dyes, and after the solvent is removed, it is applied to a fabric. Infusiella 1 - Dyeing method characterized by continuously transferring dye.

(Mechanism of action of the invention) If the ink that is ejected from an inkjet nozzle is applied directly to various types of fabric, if the ink bleeds severely, the diameter of the droplet being ejected will be 10 to 2 times larger on the fabric.
It will spread 0x.

In order to obtain sharp patterns on any type of fabric, dye ink is applied onto a smooth, impermeable carrier that has no affinity for dyes, and the solvent in the ink is evaporated to prevent the dye from bleeding into the fabric. Move to. The key point of the present invention is to create a mechanism in which this J: connection operation is repeated and inkjet is repeatedly applied onto the carrier in an endless state.

Therefore, the endless carrier to which ink is applied by inkjet used in the present invention is required to have the following performance.

(1) After the solvent in the inkjet ink evaporates, the droplet spread is small.

(2) Even when the dye remaining on the carrier is transferred to the fabric,
A sharp pattern is maintained with less diffusion to the surrounding area.

(3) After the dye is transferred from the carrier to the fabric, the carrier 51 There is little residual dye on the body.

(4) Even if a small amount of dye or auxiliary agent remains on the carrier, the carrier can be used repeatedly by simply wiping it off.

Table 1 shows the results of examining the material of the endless finger body from this point of view. The droplet spread ratio in Table 1 indicates the ratio of the diameter of the dot on the carrier or fabric to the diameter of the ink droplet during flight. It can be said that the smaller this number is, the better.

6-Table 1 From the above results, as an example of the material of the endless carrier, it is preferable to use a material with a smooth surface and impermeability, such as metal or glass, which has no affinity with dyes. Although the degree of diffusion of droplets is low in paper and film, there is a lot of residual dye, and even if the residual dye is wiped off, the removability is poor, so they are unsuitable for use. For metals and glass, the degree of diffusion of the droplets is satisfactory, there is very little residual dye, and the wipeability is very good. Since these materials have good heat resistance, they are suitable for forming an endless 11-piece structure.

Cylinders and bells made of rubber, resin, or film, not just metal or glass, as long as they meet the following performance requirements:
~ can also be used. Of course, if such performance remains on the surface of the carrier, there will be no problem with the transfer performance, and it is not necessary that the entire carrier satisfies the above performance.

The inkjet method referred to in the present invention refers to a printing device that has been developed in recent years to perform non-contact recording and printing by controlling ink ejected from a 30 to 500μ nozzle. refers to something that is applied to Many inkjet methods have been devised,
There are three main types of these methods, classified according to the method of generating ink droplets, and the present invention applies to any of these methods. The first method is a pressure pulse type (on-demand type) in which ink droplets are ejected from an orifice on demand using only the force of a piezoelectric element. The second method is a pressurized vibration type in which pressurized ink is ejected from pores in the form of a jet, and vibration is applied to the ink to break it up into droplets, while at the same time applying an electric charge to control this. The third method is
In contrast to the second method described above in which pressurized ink is ejected from pores, this is an electrostatic acceleration type in which ink is drawn out from a nozzle by electrostatic attraction.

The dye ink used in the present invention consists of a dye and a solvent as main materials, and auxiliary materials such as a binder, a physical property regulator, a fungicide, an oxygen absorber, and a chelating agent are added as appropriate. be. The dye used in the present invention is appropriately selected depending on the type of fabric used, but disperse dyes having thermal sublimation properties, oil-soluble dyes, and cationic dyes R1 are preferably used. However, there are cases in which the dye is simply transferred from an endless carrier onto the fabric and then the color is developed by steaming. Metal-containing dyes, vat dyes, sulfur dyes,
Naphthol dyes, reactive dyes, oxidative dyes, etc. can be used. The liquid solvent is usually water, to which glycols, glycol ethers, amides, pyrrolidones, etc. are added. In addition to using water as the main medium, a solvent such as mineral turpentine may be used as the main medium. The viscosity of the dye ink used in the present invention is 200 cps or less, preferably 100 cps, and high viscosity ones such as those used in ordinary textile printing and printing cannot be used.
ps or less. The higher the viscosity, the less the ink bleeds, but the ink cannot be sprayed through a narrow nozzle.

Fabrics that can be applied to the present invention include polyester, polyamide, acetate, acrylic, etc. that can be heat-transferred with heat-sublimable dyes, and mixtures of these materials with different types of 1JAN. If not used, other chemicals [, natural 41
1i is used.

Next, the dyeing process using Infusiella 1~ according to the present invention,
This will be explained using an example shown in the drawings. The drawings show an example of an apparatus for carrying out the invention. Droplets of dye ink ejected from an inkjet nozzle 1 are deposited on a cylinder 2 made of stainless steel or the like, which is an endless carrier. The cylinder 2 rotates clockwise at low speed, and the preheater 3 removes water, which is the main solvent in the dye ink. The dye ink on the cylinder 2 from which the main solvent has been removed is overlapped with the fabric 4 at the presser roller 6, and the dye in the dye ink is transferred to the fabric by the heat treatment heater 5, and then passed through the presser foot 1] - roller 6' to the fabric 4. ' is wound up.

Residues in the dye ink remaining on the cylinder 2 are removed by a cleaning brush 7, and dye i1'il ink is applied again under the nozzle 1. The preheating heater 3 needs to be maintained at a temperature necessary to remove the main solvent in the dye ink, and although the temperature varies depending on the type of main solvent, for example, in the case of water, 80°C to 130°C is optimal. The heat treatment heater 5 has a heat treatment heater of 18
0°C to 230°C is optimal. If the dye is not a heat treatment +1 dye, the heat treatment heater 5 may be something like a water heater. Cylinder 2 may be a belt that rotates endlessly.

(Effects of the Invention) The present invention uses an inkjet method to form sharp designs on any type of fabric without preparing a printing screen or engraving roller in advance. It is unique in that it allows designs to be dyed in a reasonable manner without using paper.

The present invention will be specifically explained below with reference to Examples, but the present invention is not limited to these in any way.

Example 1 Smooth surface and non-penetrating f! A stainless steel drum was used as the endless carrier. Using the apparatus shown in the drawing, polyester fabric was dyed with Infusiera] under the following conditions.

(1) Inkjet method: On-demand type (2)
Nozzle diameter = 60μ (3) Distance between nozzle and fabric: 1mm (4) Applied voltage: 20V (5) Composition of dye ink: Terraprint Red 3GN Liquid (disperse dye manufactured by Ciba Geigi) 4 parts Sodium Alginate 40C11S ( (manufactured by Kimitsu Chemical) 1 part ion-exchanged water 95 parts total ゛ 100 parts (6) Viscosity of dye ink: 10 cps (7) Preheating heater: Infrared heating to bring the cloth temperature to 100°C (8) Heat treatment heater: Infrared heating to bring the cloth temperature to 200°C (9) Cleaning brush: Nylon brush 6C))
Stainless steel cylinder surface speed: 2m/min (11
) Fabric: Polyester Fabric (Palace) 13- (A sillage pattern was formed on the qed polyester fabric, and when the diameter of the dots formed on the fabric was measured, it was approximately 1 of the diameter immediately after the dots were about to fly from the nozzle.) The stainless steel cylinder could be used repeatedly and continuously by cleaning it with a cleaning brush.

[Brief explanation of drawings]

The drawing is a schematic representation of one row in which the invention may be implemented. 1 is an on-demand nozzle, 2 is a metal cylinder,
3 is a preheating heater, 4 is a fabric before treatment, 5 is a heat treatment heater, 6 and 6' are presser rolls, 4' is a dyed fabric,
7 is a cleaning brush. Patent applicant Higashi Shi Co., Ltd. Rei 14-

Claims (1)

[Claims] A dye ink with a viscosity of 200 cps or less is applied onto a smooth, impermeable, endless carrier with no affinity for dyes using the inkjet method, and after the solvent is removed, the dye is continuously transferred to the fabric. An inkjet dyeing method characterized by: