JPH06287871A - Method for wet transfer printing - Google Patents

Abstract

PURPOSE:To readily carry out wet transfer printing by adding microcapsules containing water or an aqueous solution of an alkali agent to a water-soluble resin layer or a printing ink layer, releasing water, etc., in the microcapsule by transfer and pressurizing, simultaneously transferring. CONSTITUTION:A substrate sheet (e.g. plastic film or sheet, synthetic paper or paper) is provided with a transfer resin layer of a water-soluble resin (e.g. alginate, CMC, dextrin or PVA) to be dissolved in water or a solvent prepared by mixing water with ethyl alcohol or isopropyl alcohol and a printing ink layer containing dye (e.g. reactive dye, disperse dye or acidic dye corresponding to material to be transferred) through the transfer resin layer. Microcapsules containing water or water and an aqueous solution of an alkali agent are added to one of the transfer resin layer and the printing ink layer or both to give transfer paper, which is superimposed to a material to be transferred, pressurized to release water, etc., in the microcapsules and the water-soluble resin is wetted. Simultaneously both the layers are transferred to the material to be transferred, which is heated with steam and cleaned to readily carry out wet transfer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet transfer printing method using a water-soluble resin as a transfer resin for easy transfer.

[0002]

2. Description of the Related Art Conventionally, a wet transfer printing method has been known in which a transfer resin layer is provided on a base sheet such as paper having permeability of printing ink or a base sheet such as plastic film having no permeability of printing ink. A transfer ink is prepared by providing a printing ink layer (pattern) with a printing ink containing a dye on the resin layer, or in the case of a base sheet such as a plastic film, printing containing the dye directly on the base sheet. A printing layer (pattern) is provided using ink to create a transfer paper, and the printing surface of the transfer paper and the transfer base material made of cloth are superposed, and heat and pressure are applied by utilizing the thermal adhesiveness of the transfer resin. After transfer of at least the printing layer to the transferred substrate by means of wet adhesion of the transfer resin with water under pressure, or by using the adhesion of the printing ink, steam heat treatment, washing treatment, drying Printing It is known as a method of obtaining a. As a material to be transferred by utilizing the water-wetting adhesiveness of the resin, a material used for the transfer resin is described in, for example, Table 3-5.
Japanese Patent Publication No. 47-2821, for example, is disclosed in Japanese Patent Publication No. 00428, and as a binder (resin) for printing ink.
No. 1 publication is known. That is, the binder (resin) of the transfer resin or printing ink is water or a resin that is soluble in an aqueous solvent mainly containing water, such as methanol, ethyl alcohol, and lower alcohols such as isopropyl alcohol, such as sodium alginate, tragacanth gum, carboxymethyl cellulose, dextrin, The use of polyvinyl alcohol or the like is desirable because the cleaning process is extremely easy. Since these water-soluble resins do not have thermal adhesiveness, they cannot be transferred by heating and pressurization, but they dissolve in a water-based solvent (or wet) to give adhesiveness.

[0003]

However, as described in JP-A-3-500428 and JP-B-47-28211, the dyeing is carried out by using an alkaline agent such as a reactive dye as a fixing agent (medium). The product is used in a wet state by impregnating an aqueous solution of an alkaline agent in a pretreatment of cellulose fiber before transfer (in the case of a dye that does not require a medium, it is mainly composed of water). , It is necessary to hold an appropriate amount of water in the cellulose fiber and guide it to the transfer process,
In the transfer, the retained water is used to dissolve or wet the water-soluble resin to give adhesiveness and transfer. It is difficult to control the water content by keeping the proper water content, and it is necessary to perform the transfer immediately after the pretreatment, or the machine must be an in-line device with the pretreatment device and the transfer device. . Further, in Japanese Patent Publication No. 47-28211, in the transfer, the transfer paper and the transfer-receiving base material are contacted with each other for 20 seconds to 220 seconds (in a substantially pressurized state) while applying heat of 100 ° C. or more. It is necessary to keep it (probably dyeing is progressing at this time), and this is not possible with a roll type transfer machine capable of continuous work, and even if it can be done, there is a problem that the device will be large-scale. is there. Also, the pretreatment is
The transferred substrate is dipped in the pretreatment layer containing the pretreatment liquid and squeezed with a mangle machine, but the alkaline agent is present in the transferred substrate more than necessary and the cleaning treatment is performed sufficiently. There is a problem that you cannot go without it.

[0004]

In order to solve the above problems, the present invention provides a transfer paper by providing a printing ink layer on a base sheet with a printing ink containing a dye via a transfer resin layer. In a wet transfer printing method in which a transfer resin layer and a printing ink layer of the transfer paper are prepared and transferred to a substrate to be transferred, and then subjected to steaming heat treatment, washing treatment, and drying to obtain a printed material, the transfer resin layer is water-soluble. Of the transfer resin layer or the printing ink layer or both of the transfer resin layer and the printing ink layer contains microcapsules containing water or an aqueous solution, and the printing surface of the transfer paper and the transferred substrate are Wet transfer printing, characterized in that the microcapsules are broken down by overlapping pressure to release water to dissolve or wet the water-soluble resin, and at the same time, the transfer resin layer and the printing ink layer are transferred to the transfer-receiving substrate. Is the way.

The present invention also relates to a wet transfer printing method, wherein the aqueous solution is an alkaline agent aqueous solution.

[0006]

Since the water or the aqueous solution or the alkaline agent aqueous solution is microencapsulated, the microcapsules are broken by the transfer pressure to release the water or the aqueous solution or the alkaline agent aqueous solution. Dissolves or wets and the water-soluble resin loosens, bites into the transferred substrate, and at the same time a slight adhesiveness appears, so it adheres to the transferred substrate, while on the other hand, for the base sheet The base sheet can be peeled off even if it has a slight adhesiveness, and most of the water-soluble resin can be left on the transferred substrate.

In the present invention, the base sheet is a plastic film or sheet of polyethylene terephthalate, polypropylene, polyethylene, nylon, etc.,
Synthetic paper, simple paper, paper coated with a releasable resin (silicone resin, etc.) or sealing paint, or laminated with a plastic film.

As the transfer resin, a resin soluble in water or a solvent mainly containing water and lower alcohols such as methanol, ethyl alcohol and isopropyl alcohol, for example, sodium alginate, tragacanth gum, carboxymethyl cellulose, dextrin, polyvinyl alcohol and the like can be used.

The dye is properly used depending on the material of the substrate to be transferred. For example, a disperse dye is used for polyester fiber, a basic dye is used for acrylic fiber, an acid dye is used for nylon fiber, and a reactive dye is used for cellulose fiber such as cotton. To use.

As the reactive dye, a reactive dye such as a vinyl sulfone dye, a monochlorotriazine dye, a dichlorotriazine dye, a trichlorotriazine dye, and a chloropyrimidine dye is used alone or in combination. be able to. To print the cellulose fibers, these reactive dyes may be used alone,
In the mixed-spun fabric of cellulose fiber and synthetic dye, good printing can be performed by using another dye having an affinity for the reactive dye and synthetic fiber, for example, a dye in which a disperse dye, a vat dye and the like are appropriately mixed.

The reactive dye requires an alkaline agent as a fixing agent, and examples of the alkaline agent include baking soda, caustic soda, sodium carbonate, potassium carbonate, sodium silicate, and ammonia.

[0012]

The present invention will be described in detail with reference to the drawings in the embodiments. <Example 1> As shown in FIG.
A transfer resin was prepared by mixing carboxymethyl cellulose as a water-soluble resin and microcapsules 5 containing an aqueous solution of an alkaline agent on a paper of g / m ² in the following formulation.
A transfer resin layer 3 was provided by applying a dry coat of 5 μm thick with a coater and drying. (Transfer resin) Carboxymethyl cellulose: 5 parts by weight Water: 95 parts by weight Microcapsule: 5 parts by weight [Arabia rubber is used as a wall material for internally containing 3% ammonia] A screen containing a dye having the following composition on the transfer resin layer 3 A transfer paper 1 provided with a printing ink layer 4 was prepared by dry-printing with a printing ink to a thickness of 5 μm by screen printing. (The printing method is preferably gravure printing or screen printing, preferably screen printing.) (Printing ink) Reactive dye: 5 parts by weight [Dia Miller TBG, manufactured by Mitsubishi Kasei Co., Ltd.] Carboxymethyl cellulose (binder): 10 parts by weight Water: 50 parts by weight Department

The printing surface of the transfer paper 1 and a cotton cloth (70 × 70)
50 kg of linear pressure between a pair of upper and lower two rolls (one upper roll is a room temperature metal roll and one lower roll is a cotton roll) as a transfer machine.
/ Cm ² was passed. The paper was easily peeled off, and the transfer resin layer and the printing ink layer remained on the cotton cloth side and could be transferred. The transferred cotton cloth was subjected to steam heat treatment (steaming) at 80 ° C. for about 30 minutes to dye the cotton cloth (fix). Next, it was washed with warm water of 60 ° C. for 10 minutes, and further with room temperature water for 10 minutes, and dried. Thus, the washing could be easily done with water only.

<Embodiment 2> As shown in FIG. 2, microcapsules in which a dye having the following composition and an aqueous solution of an alkaline agent are contained in the transfer resin layer 3 in which the transfer resin layer 3 is provided on the base sheet 2 in the embodiment 1. A printing paper 1 containing a printing ink layer 4 was prepared by dry printing to a thickness of 5 μm using a printing ink for screen printing containing 5 by screen printing. (Printing ink) Reactive dye: 5 parts by weight [Diamirror TBG, manufactured by Mitsubishi Kasei Co.] Carboxymethyl cellulose (binder) 10 parts by weight Microcapsule 5 parts by weight [Arabia rubber is used as a wall material for containing and containing 3% ammonia] Water ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ 50 parts by weight

The printing surface of the transfer paper 1 and a cotton cloth (70 × 70)
Denier), and after the transfer, the same operation as in Example 1 was performed to obtain a printed material. As in Example 1, transfer was easy at room temperature, and cleaning was also easy with water.

[0016]

Since the present invention is the method as described above,
A water-soluble resin can be used for easy transfer at room temperature, and a large transfer device is not required, and a simple transfer device is sufficient. Further, the cleaning is extremely easy, and in the printing which requires the aqueous solution of the alkaline agent, the fact that the necessary amount of the aqueous solution of the alkaline agent can be supplied also facilitates the cleaning. Since the water or the alkaline agent aqueous solution is microencapsulated and provided separately on the transfer paper, it is not necessary to moisten the transfer target cloth with the water or the alkaline agent aqueous solution before the transfer. Therefore, there is no need to control the water content or use an in-line device between the pretreatment device and the transfer device. In particular, this method is extremely effective as compared with the case where the transfer-receiving cloth was pretreated with an alkaline aqueous solution.

[Brief description of drawings]

FIG. 1 is a sectional view of a transfer sheet according to a first embodiment.

FIG. 2 is a sectional view of a transfer sheet according to a second embodiment.

[Explanation of symbols]

 1 ... Transfer paper 2 ... Base sheet 3 ... Transfer resin layer 4 ... Printing ink layer 5 ... Microcapsule

Claims (2)

[Claims] 1. A transfer paper is prepared by providing a printing ink layer on a base sheet with a printing ink containing a dye via a transfer resin layer, and the transfer resin layer and the printing ink layer of the transfer paper are covered. In a wet transfer printing method in which a printed material is obtained by performing steaming, washing, and drying after transferring to a transfer substrate, the transfer resin layer is a water-soluble resin layer, and the transfer resin layer or the printing ink layer or the transfer resin layer is used. Both the printing ink layer and the printing ink layer contain microcapsules containing water or an aqueous solution, and the printing surface of the transfer paper and the base material to be transferred are superposed to destroy the microcapsules by pressurizing to release water to dissolve water. A wet transfer printing method, which comprises dissolving or moistening a functional resin and simultaneously transferring a transfer resin layer and a printing ink layer onto a transfer-receiving substrate. 2. The wet transfer printing method according to claim 1, wherein the aqueous solution is an alkaline agent aqueous solution.