JPS6020508B2 - Printing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing method for natural fibers, synthetic fibers, etc., and relates to a novel printing method that is completely different from conventional dry transfer printing methods and direct printing methods.

In other words, the methods for printing natural fibers, synthetic fibers, etc. can be broadly classified as printing on a support such as paper or film using ink containing heat-transferable dyes such as sublimation and melt-transferable dyes. A dry transfer printing method in which a transfer sheet is closely attached to the cloth to be dyed, and only the dye in the ink is transferred and fixed to the cloth by heat and pressure treatment, and the dye is contained in the cloth to be dyed. Print directly with textile ink,
A direct printing method is known in which the material is then subjected to a color-developing fixation treatment such as steaming or dry heat treatment (thermosol), and then finished by soaping and drying. The present invention is a printing method that is completely different from these conventional methods, in which the cloth to be dyed is temporarily adhered to a sheet such as paper or film in advance, and then ink containing heat-transfer type dyes such as sublimation, melt-transfer, etc. It is characterized by directly printing the dyed cloth surface and then drying it using a dry heat transfer machine. The present invention will be described in detail below. The fabric to be dyed, such as natural fibers or synthetic fibers, is bonded to a support that can withstand dry heating conditions (around 200°C), such as kraft paper or aluminum foil, using an adhesive. wear.

The adhesive used here is preferably one that is relatively easily soluble in water or an organic solvent in order to facilitate the subsequent separation process.Specifically, water-activated adhesives include gum arabic, sodium alginate, and dextrin. These may be used singly or in combination. Next, the surface of the cloth to be dyed is directly printed with an ink containing a heat-transferable dye such as sublimation or melt-transferable dye. The ink is locus bean gum, sodium alginate,
An aqueous vehicle such as aqueous acrylic is used, and suitable dyes include thermosol-compatible dyes, mainly disperse dyes, and dry transfer printing-compatible dyes, and some basic dyes can also be used. Next, the fabric to be dyed, which is integrated with the support, is used as it is in a dry heat transfer machine, and the ink surface is covered with a cover paper to prevent the ink from contaminating others. Heat treatment to complete color development and fixation.

At this time, by using synthetic fibers such as polyester, nylon, acrylic, etc. instead of the cover paper, the ink image formed on the synthetic fibers is the opposite of the ink image formed on the fabric to be dyed, similar to conventional dry transfer printing. A transfer printed image is formed. Naturally, at this time, the fabric to be dyed is also dyed, so by the circular heat treatment, two printed fabrics in mirror formation can be obtained at the same time. Next, the fabric to be dyed and the support, which are integrated together, are immersed in the true solvent of the adhesive interposed between them to dissolve the adhesive and separate the fabric to be dyed and the support (separation step). Next, the cloth to be dyed is washed to remove the vehicle in the ink and any unnecessary dyes that did not contribute to color fixation (washing process), followed by washing with water and drying. The printing method of the present invention is completed.

To explain the present invention in more detail with reference to the drawings and according to an embodiment, a water-activated adhesive (gum arabic) is pattern-coated (applied) in stripes on one side of the unbleached craft 40 using a gravure method, dried and then rolled. and obtain a support paper.

Next, as shown in FIG. 1, the support paper 2 is set on the unwinding roll 1 of an ordinary gravure printing machine, and the newly installed equipment is set on the unwinding roll 3 of the cloth to be dyed and the dampening roll 4, respectively. A cloth to be dyed 5 and water 6 are set. The cloth to be dyed 5 is transferred to the activated support paper 2 by the water dampening roll 4.
is bonded together with a rubber roll 7' of a seasoning roll heated to 100° C. or higher by a heating roll 7 to form an integrated product, and then gravure printing is performed in a printing unit 8. In this case, the drying device 9 between each unit is not particularly important, and printing of weton fertilizer is also possible. Next, the dyed fabric 5 integrated with the support paper 2 is dried in a final drying device 10 and wound up, and proceeds to the next color development and fixing step. A feature of this printing process is that, of course, the fabric to be dyed 5 is pasted together in advance using a separate machine, but pattern matching is usually rare in multicolor printing. This requires imprinting, and it is a problem to use expensive materials at the mold-fitting stage, so lead vapor guide cloth is used. However, the idea behind lead paper is to calculate and set the number of meters required for mold matching in advance, and sometimes contrary to expectations, it takes a long time to match the molds, and valuable real material may end up being imprinted. Therefore, as mentioned above, in this embodiment, the imprinting pattern matching is performed using only the support paper 2,
When the pattern is completely matched, the impression roll 11 of the dampening roll 4 is dropped, and at the same time the dampening roll 4 is dampened, the fabric 5 to be dyed is provided with a groove. In this case, it was necessary to make some adjustments to the fit because the fabric was thicker, but I was able to completely cover it with very few minor adjustments. The fabric to be dyed 5 bonded to the support paper 2 thus obtained is then led to a color fixing process, which is carried out using a conventional dry heat transfer machine.

Figure 2 shows a dyed fabric pasted on support paper 2 using a thermoprinter (manufactured by Inoue Kinzoku Kogyo K.K.), which is one of the representative models of Satonetsu transfer machines. 5 supplies the ink with the ink surface facing the heater roll 12 surface. A cover paper 13 is supplied to prevent contamination of the heater roll 12 with ink and dye. The fabric to be dyed 5 is sandwiched between the endless belt 14 and the heater roll 12, the support paper 2 and the cover paper 13, and
The color fixation is completed by processing at a temperature of around 00°C for 20 to 40 seconds. Figure 3 shows color development and fixation using Vacumat (manufactured by Kanegisser), a famous dry heat transfer machine that uses suction.

The cloth to be dyed 5 pasted on the support paper 2 is passed through a cylinder 15 with internal vacuum, the surface of which has numerous holes, in a direction that makes it come into close contact with the surface of the cylinder 15, and then passed far outside the cylinder 15. Heating reflector plate 1 equipped with an infrared heater
6, color development and fixation are completed by heating from the ink surface.

In this case, the suction is used to set the support paper 2 uniformly and tightly in the cylinder. Furthermore, this color fixation method produced a better texture than the method using a thermoprinter as shown in Figure 2.

The reason for this is thought to be that the pressure applied by the endless belt 14 tends to harden the texture. Next is the cleaning step, since the ink used is an aqueous vehicle, so cleaning can be easily done with a general water soap pink liquid to which anionic or nonionic surfactants, soda ash, etc. are added.

Prior to washing, the support paper 2 and the cloth to be dyed 5 were separated by moistening with water, which activated (dissolved) the water droplet adhesive and enabled easy separation. Finally, the fabric was washed with water and dried on a flattened surface to obtain a multicolored printed fabric with clear patterns and a uniform tone.

As described above, the present invention has an intermediate structure between the dry transfer printing method and the direct printing method, so when introducing both secondary printing systems, both devices were required. It becomes possible to serve as both.

Furthermore, by using synthetic fibers such as polyester, nylon, and acrylic as the cover paper, the practical effects are extremely great, such as being able to cover two pieces of printed cloth related to the bell statue at the same time.

[Brief explanation of the drawing]

The drawings show an example of the present invention, and FIG. 1 is an explanatory diagram showing the adhesion of the support and the cloth to be dyed and the printing process of the cloth to be dyed, and FIGS. 2 and 3 are illustrations showing the color fixing process. An explanatory diagram is shown respectively. DESCRIPTION OF SYMBOLS 1... Unwinding roll, 2... Support paper, 3... Cloth unwinding roll, 4... Moistening roll, 5... Fabric to be dyed, 6...Water, 7...
- Heating roll, 7'... Rubber roll, 8... Printing unit, 9... Drying device, 10... Final drying device, 11... Impression roll, 12...
...Heater roll, 13...Cover paper, 14...
Endless belt, 15...Cylinder, 16
...Heating reflector. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A cloth to be dyed and a support are bonded in advance via an adhesive,
Printing on the surface of the fabric to be dyed with an ink containing a heat-transferable dye, dry heat treatment using a dry heat transfer machine to color and fix the dye to the fabric to be dyed, and then separating the support and the fabric to be dyed, Furthermore, the textile printing method is characterized by washing and removing the vehicle in the ink, unnecessary dyes, etc. from the cloth to be dyed, followed by washing with water and drying. 2. The textile printing method according to claim 1, wherein the ink surface of the cloth to be dyed is covered with a cover paper and subjected to dry heat treatment using a dry heat transfer machine. 3 Instead of cover paper, use polyester, nylon,
The printing method according to claim 2, which uses synthetic fibers such as acrylic fibers.