JPS6140794B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a transfer printing method.

Traditionally known transfer printing methods include the sublimation transfer printing method, which uses the characteristics of the dye to transfer the dye, and the dye-containing ink layer, which is transferred to the textile to be printed, and then the fixation of the dye and the excess ink layer. This is a wet transfer printing method that includes a step of removing components (such as a binder) and a transfer varnish layer. However, in the sublimation transfer printing method, since transfer is performed depending on the characteristics of the dye, the dyes that can be used are limited, and therefore the types of fibers that can be printed are limited.
In addition, all kinds of dyes can be used in the wet transfer printing method, but it requires post-processing after printing.
Furthermore, it requires equipment for post-processing, and is extremely disadvantageous in terms of process and equipment compared to sublimation transfer printing.

Under these circumstances, the present inventors first polymerized the transfer paper and the cloth to be printed in close contact with each other in a steam atmosphere such as saturated steam at normal pressure or superheated steam at normal pressure, and then applied moist heat for a certain period of time. It was discovered that good printed products could be obtained. This method is essentially based on the transfer of dye by the action of steam, and unlike sublimation transfer printing, any dye can be used, and since the ink layer is not transferred, it can be It has the advantage of not requiring any process.

However, this method also has deficiencies not found in known sublimation transfer printing methods. In other words, in the sublimation transfer printing method, the base paper for the transfer paper is inexpensive, easy to handle, easy to obtain, and the disperse dye mainly used is essentially hydrophilic cellulose fiber, which is the raw material for paper. Gravure paper, art paper, coated paper, etc. are generally used because they have no affinity for dyes, so the color development of the dye is not significantly inhibited even without any surface treatment. However, in the above method of transfer printing in a steam atmosphere, the dye penetrates into the base paper due to the influence of the steam, resulting in a significant loss of transfer efficiency. This tendency is particularly noticeable when water-soluble dyes are used, and when dyes with strong binding properties to cellulose fibers, such as reactive dyes and direct dyes, are used, almost no transfer occurs. This defect is essentially based on transfer printing in a steam atmosphere, and is unique to this process; no other transfer printing process would allow dye to penetrate into the base paper in such a disastrous manner. It will not bring any results.

In order to solve this problem, the present inventors have already proposed a transfer printing method in which a hydrophobic resin layer is provided on a base sheet, and a transfer paper is printed on the hydrophobic resin layer with a printing ink containing a dye. Regarding this improved method, the first object of the present invention is to provide a transfer printing method with even higher transfer efficiency, and the second object is to provide a transfer paper for use in this transfer printing method.

That is, the transfer paper of the present invention is characterized in that a hydrophobic resin layer is provided on a base sheet, a hydrophilic resin layer is provided on top of the hydrophobic resin layer, and the transfer paper is further printed with a printing ink containing a dye. Therefore, in the transfer printing method of the present invention, a hydrophobic resin layer is provided on a base sheet, a hydrophilic resin layer is provided on top of the hydrophobic resin layer, and a transfer paper formed by printing with a printing ink containing a dye is further coated on top of the hydrophobic resin layer. It is characterized by adhesion polymerization to printed fabric and transfer printing in a steam atmosphere.

The printing ink used in the present invention may be an ink containing a binder made of a water-soluble resin, or may be an ink containing a binder made of an oil-soluble resin.

Hydrophobic resins that can be used in the present invention include, for example, acetylcellulose, caprylic cellulose, nitrocellulose, methylcellulose, ethylcellulose,
Hydroxyethyl cellulose, cellulose acetate butyrate, cellulose propionate, polyvinyl acetate, vinyl chloride/vinyl acetate copolymer, modified polyvinyl chloride, polyvinyl formal, polyvinyl briral, polyvinyl alkyl ether, vinyl acetate/ethylene copolymer, Polyacrylate (carboxylic), polyacrylic ester, methyl acrylate, cyanoacrylate, acrylate/vinyl acetate copolymer, polystyrene, polyamide, polyurethane,
These include chain polyesters, polyhydroxyethers, maleic acid resins, cyclized rubbers, chlorinated rubbers, etc., and may be thermoplastic, but are not necessarily thermoplastic.

Examples of the hydrophilic resins that can be used in the present invention include water-soluble acrylic resins, water-soluble polyvinyl alcohols, normally solid polyethylene glycol and its derivatives, alkaline and water-soluble polyamide resins, maleic acid resins, and the like.

The present invention has the above-described structure, and since a hydrophobic resin layer is provided between the base sheet and the printing ink, dyes do not inadvertently penetrate into the base sheet during transfer printing in a steam atmosphere. Moreover, the steam sufficiently penetrates into the hydrophilic resin layer provided between the hydrophobic resin layer and the printing ink and promotes the transfer of the dye, so that a good printed product can be obtained.

The merits of the present invention will be apparent from the following examples.

Example 1 A 30 g/m ² print base paper (manufactured by Shirakawa Paper Industries) was coated with an oil-based varnish containing a hydrophobic resin and having the following formulation using a gravure endless plate with a plate depth of 30 μm.

Cellulose acetate butyrate (CAB553
-0.5, manufactured by Eastman Kodatsu Co.) 12 parts ethanol 88 parts Thereafter, an aqueous varnish having the following formulation was further coated using a gravure endless plate having a plate depth of 35 μm.

Polyethylene glycol (degree of polymerization 6000) 25 parts Water 30 parts Methanol 40 parts Thereafter, printing was carried out with a printing ink having the following formulation to obtain a transfer paper.

Shibacron Brilliant Blue FBR-B
(manufactured by Ciba Geigy) 150 parts PVA205 (manufactured by Kuraray) 10 parts isopropyl alcohol 55 parts water 20 parts Separately, mercerized cotton 100 parts
% broadcloth was padded in a treatment solution consisting of 100 g of urea, 30 g of 38° Baume sodium hydroxide, and 1000 g of water, and after squeezing to a squeezing rate of 80%, it was further heated to 100°C.
It was air-dried for 20 seconds to obtain a printed fabric.

Next, this printed fabric and the printed surface of the above-mentioned transfer paper were placed on top of each other, and heat transfer was performed in saturated steam at normal pressure at 100°C for 2 minutes to obtain a durable and beautiful dyed fabric.

Claims (1)

[Claims] 1 A hydrophobic resin layer is provided on a base sheet, a hydrophilic resin layer is provided on top of the hydrophilic resin layer, and a transfer paper made by printing with a printing ink containing a dye is closely polymerized on the fabric to be printed, and then steamed. A transfer printing method that is characterized by printing by transferring only the dye in an atmosphere.