JPS5830435B2 - Moyosenshiyokuhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for dyeing a textile product with a desired pattern.

2. Description of the Related Art Methods for dyeing textile products made of cloth, nonwoven fabric, etc., such as scarves, towels, towels, kimonos, etc., into desired patterns are conventionally known.

However, most of these are done using a method called textile printing.
It is a method of applying coloring agent from above a prescribed paper pattern,
The method was silk screen printing.

This conventional method is printing rather than dyeing, and is a method of applying printing ink, so the printing ink may not stick to some fibers, and the color fastness is poor, resulting in poor durability. It also had the disadvantage of poor washability and weather resistance.

Also, from a process standpoint, printing required a special workshop, and it was impossible to dye the product in-store to match the customer's preference.

The present inventor has completed the present invention as a result of research into a method that solves the above-mentioned drawbacks and can easily dye a desired pattern.

The present invention is a method of directly dyeing fibers using a dye, rather than applying ink as in the conventional method.

Indigo dyes (indigoid dyes and indanthrene dyes) have chromophores, dissolve into the leuco form upon reduction, are adsorbed onto fibers, and are oxidized by air to form the original insoluble dye. It is a dye.

This indigo dye develops color when exposed to the air as described above, but the inventor has also discovered that it develops color and dyes when irradiated with ultraviolet rays in the presence of moisture.
I recently obtained a patent.

The present invention applies this principle.

That is, the present invention is a method in which the leuco form of an indigo dye is microencapsulated by a commonly known method, and the microcapsules are supported on a support such as paper or plastic film via a suitable binder (vehicle). The transfer paper is used as a transfer paper, and the transfer paper and a textile product such as cloth are combined under pressure, and then irradiated with ultraviolet rays to dye the cloth.

In this case, if the transfer paper is prepared by printing a microcapsule coating agent containing the leuco form of indigo dye on the support in advance in the desired pattern, the transfer paper will be dyed according to the printed pattern. Patterns can be dyed by applying the above-mentioned microcapsule coating agent to the entire surface, applying a negative film with a desired pattern during UV irradiation, and irradiating it with light, or pressing it with a patterned roll and then irradiating it with UV rays. .

Note that the construction of the transfer paper allows for multicolor dyeing similar to or greater than that of conventional printed matter by overprinting or overprinting leuco microcapsule coating agents of dyes with different color development.

To explain the present invention more specifically, as the indigo (or indigosol) dye, for example, those shown in the following table are used.

Generally known methods are used to obtain the leuco form of indigo dyes.

For example, if an indigo dye is dissolved in pyridine and reduced with hydrosulfide or zinc powder, it becomes a leuco dye (colorless).
I can do it.

This substance is insoluble in water, but becomes water-soluble when reacted with chlorosulfonic acid while heating.

This is salted out to obtain a powder.

The leuco body thus obtained is, for example, 21 at pH 5 to 7.
: Make fb aqueous solution and microcapsulate.

The size of the microcapsules varies depending on the purpose of use, but it is usually good to have a diameter of about 0.1 to 0.2 mm.

If it is too thick, the outline of the dyed pattern will be blurred, and if it is too small, the microcapsules may not break when the transfer paper and cloth are pressed together.

As described above, the microcapsules are prepared in the form of a coating agent using a suitable coloring agent in the same manner as the usual microcapsule coating solution.

During preparation, the coating agent is colored to match the color of the dye to be colored, and the various microcapsule coating agents are gravure printed on a support such as paper or plastic film in the desired pattern. to obtain transfer paper.

For dyeing, the transfer paper and cloth are pressed together using a pressure roll to destroy the microcapsules, and when irradiated with ultraviolet rays, the leuco bodies develop color and are dyed.

Special equipment is required for UV irradiation. First, commercially available office copiers with built-in mercury lamps can be used as is.

To explain the present invention with reference to figures, FIG. 1 is an enlarged partial cross-sectional perspective view of a transfer paper, in which 1 is a support such as paper or plastic film, 2 is a microcub; a coating layer of a cell coating agent, and 3 is a microcoat. Showing a capsule.

Fig. 2 shows an example of continuous transfer dyeing, in which the transfer paper 4 and cloth 5 are unwound and sent to a pressure roll 6, pressed to destroy the microcapsules, and then transferred using a mercury lamp. The paper is sent to a copying machine 9 having a copying machine 7, irradiated with ultraviolet rays, colored and dyed, and then wound up.

In the figure, 4' is a transfer paper take-up roll, 5' is a cloth take-up roll, and 8 is a glass cylinder provided outside the mercury lamp.

In the above row, processing is carried out continuously, but it is also possible to process sheet-like objects one by one.

In that case, other suitable pressure means may be used instead of the pressure roll.

As mentioned above, when using the method of the present invention, unlike conventional methods, there is no need for dye liquid or printing ink, and there is no need for special dyeing equipment, so there is no need to get dirty during dyeing.
It has the advantage that a desired pattern can be dyed in front of the customer.

Indigo dyes have a sunlight fastness level of 4 to 5, and have excellent washing and abrasion resistance, so they are used for dyeing high-grade products.
It can also be fully utilized.

The present invention can also be applied to fibers to be dyed, such as silk, human silk, cotton, wool, and nylon, which could not be dyed in patterns conventionally.

[Brief explanation of drawings]

FIG. 1 is an enlarged sectional perspective view of a transfer paper, and FIG. 2 is an explanatory diagram showing the implementation of the present invention. In the figure, 1...Support, 2...Microcapsule coating layer, 3...Microcapsule, 4
...Transfer paper, 5...Cloth, 7...
·Mercury lamp.

Claims (1)

[Claims] 1. Microcapsules containing the leuco form of an indigo dye are coated on a support such as paper or plastic film in a desired pattern to obtain a second-grade transfer, and the transfer paper and the textile product to be dyed are bonded under pressure. , a pattern dyeing method for textile products characterized by ultraviolet irradiation.