JP2003145997A - Hydraulic transferring method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic transferring method where only a necessary amount of transfer sheets can be manufactured at a necessary time through an on-demand system to effect hydraulic transfer, and low cost correspondence to hydraulic transfer of products in a small lot is practicable. SOLUTION: The transfer sheet 1 where a print pattern layer 3 is formed on a water soluble or a water swelling property support sheet 2 is produced. Then, after an activator to give an adhesion to the print pattern layer 3 is coated on the print pattern layer 33 of the transfer sheet 1, the transfer sheet 1 is floated on water surface 5 such that the support sheet 2 side faces the water surface 5 side, and the print pattern layer 3 is activated. By pressing a subject 6 to be transferred on the print pattern layer 4 of the transfer 1, the print pattern transfer layer 4 is adhered to the part, where transfer is needed, of the subject 6 by a hydraulic pressure and the print pattern layer 4 is transferred on the surface of the subject 6 to effect hydraulic transfer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transferring and printing the above-mentioned printed pattern by hydraulic pressure using a transfer sheet provided with a printed pattern mainly on the surface of various molded articles having a three-dimensional surface or a curved surface, and particularly to a small size. The present invention relates to a hydraulic transfer method that can be applied to transfer printing of lots.

[0002]

2. Description of the Related Art Conventionally, a hydraulic transfer method has been known as a means for forming a printed pattern by transfer printing on the surface of a molded article having a three-dimensional surface with unevenness. For example, such a hydraulic transfer method is described in Japanese Patent Publication No. 52-41683, Japanese Patent Publication No. 7-55599, and Japanese Patent No. 2757346.

In the above-mentioned conventional hydraulic transfer method, when a transfer sheet is manufactured, a plate is prepared regardless of the lot size and size of the product for which the hydraulic transfer is performed, and then a gravure is used by using a rotary printing machine. The printed pattern was formed by printing or offset printing.

However, when a transfer sheet is manufactured by the above-mentioned conventional method, the same lead time (time required for plate making and operation preparation of the rotary printing press) as in the case of a large lot is required even for a small lot. Moreover, the minimum amount of raw material to be printed, ink, etc. for operating the rotary printing machine is large,
There was a problem that the cost would rise.

Further, in the above-mentioned conventional method, since the plate is used in manufacturing the transfer sheet, a space for storing the plate, labor for management, and cost are required. Further, there is a problem that plate making requires time and labor.

[0006] As a result, the conventional method is not capable of high-mix low-volume production, and so-called on-demand production, which is a short delivery time and produces a required amount when needed.
For this reason, it is difficult to print a pattern according to the individual request of each customer and transfer it by water pressure. However, the conventional method is
It is rather efficient and preferable when the hydraulic transfer is performed by a small variety, large lot, long term and planned production.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the prior art. It is possible to manufacture a transfer sheet in an on-demand system in a required amount and perform a hydraulic transfer. Therefore, it is an object of the present invention to provide a water pressure transfer method that can cope with water pressure transfer of a small lot of products at low cost and in a short delivery time.

[0008]

Means for Solving the Problems The present invention provides (1) a transfer sheet having a printed pattern layer formed by ink jet printing on a water-soluble or water-swellable support sheet, and then, After applying an activator for imparting adhesive strength to the printed pattern layer on the transfer sheet, the transfer sheet is floated on the water surface with the support sheet side facing the water surface side. Or, after suspending the transfer sheet on the water surface with the support sheet side facing the water surface side,
The activator is applied to the print pattern layer of the transfer sheet to activate the print pattern layer, and then the transfer target is pressed onto the print pattern layer of the transfer sheet, and the transfer target is transferred by hydraulic pressure. A hydraulic transfer method characterized in that a printed pattern layer is brought into close contact with a transfer-required portion of a body, and the printed pattern layer is transferred onto the surface of a transfer target. (2) A transfer sheet in which a water-insoluble and non-water-swellable waterproof primer layer is formed on a support sheet, and an ink jet printing is performed using an aqueous ink on the waterproof primer layer to form a print pattern layer. (1) to form a printed pattern layer by performing ink jet printing using a water-based ink, and then to make the printed pattern layer water-insoluble and non-water swellable. A hydraulic transfer method according to the above (1) or (2) for producing a transfer sheet by using the above is a gist.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings. The hydraulic transfer method of the present invention, as shown in FIG.
A transfer sheet (1) in which a print pattern layer (3) is formed by performing ink jet printing on a support sheet (2) made of a water-soluble or water-swellable sheet.

Support sheet 2 used for transfer sheet 1
Is a water-soluble or water-swellable sheet.
Specific materials used for the support sheet 2 include polyvinyl alcohol resin, dextrin, gelatin, glue, casein, shellac, gum arabic, starch, protein, polyacrylic acid amide, sodium polyacrylate, polyvinyl methyl ether, methyl vinyl ether. And a maleic anhydride copolymer, a vinyl acetate and itaconic acid copolymer, polyvinylpyrrolidone, acetylcellulose, acetylbutylcellulose, carboxymethylcellulose, methylcellulose, hydroxylethylcellulose, sodium alginate, and the like. The thickness of the support sheet 2 is preferably 10 to 100 μm.

The print pattern layer 3 is formed by performing ink jet printing. When printing a small lot, it is extremely effective to form the print pattern layer by on-demand printing which is generally used in commercial printing and the like. This on-demand printing is performed using ink jet printing, not a method that applies electrostatic printing (copying). As an apparatus used for ink jet printing, an ink jet printing machine, a computer for controlling the printing machine and receiving image information processing, a scanner apparatus for reading an original image and converting it into an AD, a storage apparatus for storing image information, an image display It is composed of devices. Using these devices, image data is taken in, the customer's request is also taken in, and the image is displayed on an image display device such as a CRT to adjust the color tone on the desktop, correct the image (remove unnecessary parts, etc.). ), The combination with other image data, the image stencil, the image endless processing, etc., and the surface of the support sheet 2 (or waterproof primer layer 4
(Printed surface) to form a print pattern layer 3 by ink jet printing.

The pattern of the print pattern layer 3 formed by ink jet printing is not particularly limited, and may be formed in any shape such as a wood grain pattern, a stone grain pattern, a cloth pattern, letters, figures, symbols and pictures. is there. The printed pattern layer 3 may be formed entirely or partially on the surface of the support sheet 2. The thickness of the printed pattern layer 3 is usually 1μ
The thickness is about 10 μm.

Ink jet printing is a method of printing by ejecting ink in the form of particles (droplets) from a thin nozzle onto a substrate to be printed. Depending on the method of ejecting ink and the method of controlling ink particles, There are methods such as charge control type, Hertz type, electric field control type, and pressure control type (on-demand type). Hereinafter, these methods will be described. (i) Applying a pressure of ² to 3 kg / cm2 to the charge control type ink and applying a piezoelectric element of 50 to 100 k
It is operated at a frequency of Hz or higher, ejects ink into particles,
Ink is attached to an arbitrary position by swinging the flight direction of particles up and down or left and right with a charging electrode, a deflection electrode and the like. (ii) Hertz type Ink is sprayed from a nozzle as in the charge control type. At that time, by changing the voltage of the control electrode, the spread of the spray jet ink changes,
The ink densities passing through the apertures of a certain size are different and reach the substrate. (iii) a positively charged nozzle electrode provided on a nozzle for ejecting an electric field control type ink, a negatively charged platen electrode provided on a platen that supports a printing medium and faces the nozzle, the nozzle electrode and the platen electrode And control electrodes such as open / close electrodes, horizontal deflection electrodes, and vertical deflection electrodes. This is a system in which the ink is weakly pressed and a high voltage is applied between the accelerating electrode and the nozzle immediately before the nozzle and between the counter platen electrodes, and the ink is drawn out from the nozzle by the electric field. Ink droplets have a constant charge and are turned on by the signal voltage.
Images such as characters are formed by turning off and deflecting by the deflecting plate. (iv) Applying an oscillating pressure according to the recording signal with a piezoelectric element to the pressure control type ink part,
In this method, ink particles are ejected by the change in pressure. There is also a thing (bubble jet (registered trademark) type) using an ink ejection method that utilizes the generation of bubbles by a heating method according to a signal in the nozzle.

As the ink generally used for ink jet printing, either an organic solvent diluted type or an aqueous type can be used. However, from the viewpoints of preventing nozzle clogging, preventing fire (explosion proof) with respect to organic solvents, and avoiding complexity of hygiene management, aqueous (aqueous or aqueous dispersion) inks are preferably used. On the other hand, in the present invention, the printed pattern layer 3
Since it comes into contact with water (during transfer and washing), the printed pattern layer is likely to elute and flow. In that respect, non-aqueous is preferable. As one of the preferable modes for making such a contradiction compatible, it is possible to make it water-based at the time of printing and to make it water-insoluble and non-water-swellable after printing. As a specific example of such a form, a water-based ink is composed of a polyol and a blocked isocyanate, and an ink jet printing is performed to form a printed pattern layer 3
After printing (before floating on the water surface), the printed pattern layer 3 is heated to release the block, and the polyol and isocyanate are crosslinked to make the printed pattern layer 3 water-insoluble and non-water swellable. There is a way to do it.

In the present invention, when ink-jet printing of the transfer sheet 1 is carried out, a water-soluble or water-swellable one is used as the support sheet 2 which is a printing medium. Therefore,
In order to prevent dissolution, swelling and rupture, wrinkles and deformation of the support sheet during ink jet printing, (A) water used as ink for ink jet printing to dissolve the material to be printed, etc. No water-soluble solvent (organic solvent diluted type ink) is used, or (B) as shown in FIG. 2, the water-insoluble (organic solvent diluted type) ink is previously printed on the printed surface of the support sheet 2. It is preferable to use a means such as forming a waterproof primer layer 4 made of, and forming a printed pattern layer 3 by performing ink jet printing using a water-based ink containing water.

In particular, the above method (B) allows water-based inks to be used for ink jet printing, so clogging of the ink jet printing machine is less likely to occur, fire prevention and hygiene management of organic solvents are unnecessary, and water-based inks are used. There is an advantage that there is no concern that the support sheet 2 will be dissolved or swelled during the ink jet printing using the ink.

The water-based ink used for ink jet printing is dispersed in a vehicle such as a water-soluble or water-swellable resin represented by cellulose acetate butyrate resin, if necessary, including a coloring agent such as a dye or a pigment. A composition is prepared by adding an agent, a plasticizer, an extender pigment, etc., and diluting it with water to an appropriate viscosity. As the colorant, for example, known ones such as organic pigments such as isoindolinone yellow, quinacridone red, phthalocyanine blue and aniline black, and inorganic pigments such as yellow lead, rouge, ultramarine and black are used. As the vehicle such as the water-soluble or water-swellable resin, those exemplified as the above-mentioned materials for the support sheet can be used.

As the water-insoluble ink used for ink jet printing, a resin such as acrylic resin, polyester, nitrification cotton, vinyl chloride-vinyl acetate copolymer or the like is diluted with an organic solvent such as ethyl acetate, methyl ethyl ketone or toluene. In addition to these, coloring agents and other additives as mentioned above are further added.

The waterproof primer layer 4 is a water-resistant (water-insoluble and non-water-swellable) layer which also serves as a receiving layer for absorbing ink in ink jet printing. The waterproof primer layer 4 is formed by coating the surface of the support sheet 2 with a composition in which a resin that absorbs ink of an ink jet and a tack preventive agent such as titanium dioxide powder are dissolved or dispersed in an organic solvent. It
The above resin is a nitrified cotton, cellulose acetate, cellulose-based such as cellulose acetate propionate, cationic polymer (polymer containing quaternized nitrogen), poly (meth) acrylate, poly (meth) acrylic acid. Butyl, (meth) acrylate- (meth) butyl acrylate copolymer, (meth)
Examples include acrylic resins such as methyl acrylate- (meth) acrylic acid 2-hydroxyethyl copolymer, urethane resins, polyester resins, vinyl chloride-vinyl acetate copolymer resins, and the like, which may be used alone or in combination of two or more.

If necessary, an extender pigment having a particle size of about 0.1 to 10 μm, such as calcium carbonate, silica, barium sulfate, kaolinite, or talc, can be added to the waterproof primer layer 4.

The solvent used for the composition of the waterproof primer layer 4 is pentane, hexane, heptane, octane or the like, or a mixed liquid thereof such as gasoline, petroleum, benzine, toluene, xylene, cyclohexane and ethylbenzene. Group hydrocarbons, trichlorethylene,
Perchloryl ethylene, chloroform, carbon tetrachloride and other halogenated hydrocarbons, methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, amyl alcohol and other monohydric alcohols, ethylene glycol, propylene glycol, glycerin and other polyhydric alcohols Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, ethyl ether, isopropyl ether, ethylene glycol
Ethers such as mono-methyl ether, ethylene glycol mono-ethyl ether, diethylene glycol mono-methyl ether, diethylene glycol mono-ethyl ether, diethylene glycol mono-butyl ether, diethylene glycol di-butyl ether, ethyl acetate, ethylene glycol mono -Acetic acid esters such as ethyl ether / acetate and diethylene glycol / monoethyl ether / acetate, and esters such as butyric acid ester are used alone or as a mixed solvent.

The waterproof primer layer 4 is coated by a gravure coating method, a roll coating method, a bar coating method or the like. The waterproof primer layer 4 preferably has a thickness of 1 to 10 μm. The waterproof primer layer 4 is usually formed entirely and solidly on the surface of the support sheet, but it may be partially formed only on a necessary portion.

In the hydraulic transfer method of the present invention, the support sheet 2 is used.
The product with the waterproof primer layer 4 formed on it (printed pattern layer 3
It is preferable that a large amount of (states not yet formed) be created and stored in advance. By doing so, for example,
The process of forming the waterproof primer layer 4 is performed in a factory,
Since only the printed pattern layer 3 can be formed at the site where the hydraulic transfer is performed, when an organic solvent or the like is used for forming the waterproof primer layer 4, the coating can be performed in a factory or the like with sufficient control. In this case, at the site where the hydraulic transfer is performed, it suffices to provide a printing machine (printer) for ink jet printing as a facility, and the print pattern layer 3 can be easily formed.

FIG. 3 is an explanatory view showing the concept for explaining the hydraulic transfer method of the present invention. The hydraulic transfer method of the present invention is performed using the transfer sheet 1 on which the printed pattern 3 is formed by the ink jet printing. As shown in FIG. 3, the transfer sheet 1
The transfer sheet 1 is floated on the water surface 5 so that the support sheet 2 faces the water surface side and the printed pattern layer 3 faces upward, and the printed pattern layer 3 of the transfer sheet 1 is activated by an activator.
In this case, a method in which an activator is applied to the printed pattern layer 3 in advance to activate the printed pattern layer 3 and then the transfer sheet 1 is floated on the water surface, or the transfer sheet 1 is a support sheet. Any method may be used in which 2 is floated on the water surface so that the printed pattern layer 3 is on the water side and the printed pattern layer 3 is on top, and then an activator is applied to the printed pattern layer 3 to activate it.

The activation of the print pattern layer 3 of the transfer sheet 1 means that a part of the print pattern layer 3 is dissolved or swelled to give an adhesive force in a state of easily adhering to the transfer target. is there. As such an activator, one containing a solvent capable of dissolving or swelling the binder component of the printed pattern layer 3 is used. The solvent used as the activator can be appropriately selected from those exemplified as the solvent for the waterproof primer layer according to the binder component of the printed pattern layer.

The activator may be composed of only the above solvent, but it must be evaporated until the step of transferring the print pattern layer 3 of the transfer sheet 1 to the transfer surface of the transfer member 6 is completed on the water surface. It is preferable that the surface of the transferred body 6 is not eroded. As such an activator, in a solvent that activates the print pattern layer 3 described above,
A swelling liquid obtained by adding the following resin in an amount of about 5 to 60% by mass of the solvent can be used. The swelling liquid has the advantages that the viscosity of the activator can be easily adjusted, the application means of the coating liquid can be widely used, and stable adhesiveness can be obtained even when the transfer process takes time. There is.

Examples of the resin added to the swelling liquid include vinyl halide polymers such as polyvinyl chloride and polyvinylidene chloride, polymers of polystyrene and its derivatives of styrene, and vinyl ester polymers such as polyvinyl acetate. , A polymer of an ester derivative of an unsaturated carboxylic acid such as (meth) acrylic acid, itaconic acid, crotonic acid, maleic acid or fumaric acid, a polymer of the same nitrile derivative or an acid amide derivative, or the above unsaturated carboxylic acid N-methylol derivatives of acid amide derivatives of acids and N-alkylmethylol ether derivatives, glycidyl (meth) acrylate, acrylic glycidyl ether, vinyl isocyanate, allyl isocyanate, 2-hydroxyethyl- (meth) acrylate, 2-hydroxypropyl- (Meth) acrylate, ethylene, ethylene glycol Thermoplastic resin such as homo- or copolymer of monomers such as ru-mono (meth) acrylate, or initial condensation product, natural resin, rosin and its derivatives, cellulose derivative, natural or synthetic rubber, petroleum resin, etc. Resins of The term "(meth) acrylate" means acrylate or methacrylate.

The activator may be applied onto the printed pattern layer 3 by gravure offset coating, gravure coating, roll coating, bar coating, spray coating, ultrasonic coating or the like. The amount is ^{2 to} 30 g / m ²
The amount is preferably about 3 to 15 g / m ² .

In order to float the transfer sheets 1 on the water surface 5, it is possible to float one by one a sheet-shaped transfer sheet, or 1
The roll-shaped transfer sheet formed as a continuous sheet can be continuously floated on the water surface while flowing from the direction. At this time, the support sheet 2 side of the transfer sheet 1 floats downward so that it comes into contact with the water surface.
Make sure that no bubbles enter between 1 and the water surface 5, and transfer sheet
Be careful not to cause wrinkles in 1.

Next, the transferred body 6 is pressed from above the water surface 5 onto the transfer sheet 1 and is lowered so that the transferred surface of the transferred body 6 faces downward. Part or all of the material is allowed to settle in water, and the transfer sheet 1 is extended along the shape of the transfer surface of the transfer material 6 while maintaining bubbles between the transfer sheet 1 and the transfer material 6. The transfer sheet 1 is covered and adhered to a required portion of the transferred body 6 by water pressure.

When the transfer sheet 1 floats on the water surface 5, the support sheet 2 comes into contact with water and swells when it is water-swellable and dissolves when it is water-soluble. When the support sheet 2 is water-swellable, the support sheet 2 together with the printed pattern layer 3 is a transfer target.
6 Stick to the surface. If the support sheet 2 is water-soluble,
Depending on the material, if it is completely dissolved in water and only the printed pattern layer 3 exists on the water surface (in this case, the support sheet disappears when the transfer target is pressed)
In some cases, a part of the support sheet 2 may be dissolved and a part may remain. When the support sheet 2 is completely melted, only the print pattern layer 3 is covered and adhered to the transferred body 6.

After the printed pattern layer 3 of the transfer sheet 1 has sufficiently adhered to the surface to be transferred, if at least a part of the support sheet remains undissolved, the support sheet of the transfer sheet 1 Remove 2. The support sheet 2 is removed by shower washing with water. The support sheet 2 adhering to the surface of the transfer-receiving body 6 is completely removed, and stains and the like generated during transfer are also removed. The conditions for this shower cleaning are
Usually, the water temperature is preferably 15 to 60 ° C., and the washing time is preferably 1 to 10 minutes, although it depends on the type of the support sheet 2.

Finally, the material 6 to be transferred is sufficiently dried to evaporate the water, and the print pattern layer 3 is transferred to the surface of the material 6 to be transferred to obtain a desired product having a design.

When the transfer sheet having the waterproof primer layer 4 as shown in FIG. 2 is used, when the transfer sheet 1 is floated on the water surface, the waterproof primer layer 4 has water resistance, and therefore, is not dissolved. Does not swell. Therefore, after the transfer is completed, the waterproof primer layer 4 remains on the outermost surface of the transferred product and functions as a surface protective layer of the transferred product.

In the method of the present invention, various products can be used as the transferred material 6. For example, ABS resin, polystyrene, polyolefin resin, polyvinyl chloride, resin molded body such as phenol resin, metal molded body such as iron, aluminum, copper, wood molded body, glass, porcelain, other various inorganic molded body, etc. The one formed in the three-dimensional shape can be optimally used.

The transfer sheet 1 is provided on the transfer surface of the transfer member 6.
It is possible to perform an easy-adhesion treatment for improving the adhesion with the printed pattern layer 3. Examples of the easy-adhesion treatment include formation of an easy-adhesion layer or corona discharge treatment. The easily adhesive layer is formed, for example, by applying a coating composition using a urethane-based or acrylic-based resin when the transfer target is a polystyrene resin molded body.

The temperature of the water floating on the transfer sheet 1 can be appropriately adjusted according to the type (water solubility or water swellability) of the support sheet 2 of the transfer sheet. For example, when a starch-based sheet is used as the support sheet 2, the water temperature is 4
0 to 50 ° C is preferable. Further, an additive for promoting the removal of the support sheet 2 can be added to the water. For example,
In the case of starch type sheet, 2 to 4% of amylase can be added in water.

[0038]

EXAMPLES Examples of the hydraulic transfer method of the present invention will be described below. Example 1 [Preparation of ink for ink jet printing] The following components were mixed to produce an ink for ink jet printing. Cellulose acetate butyrate resin as vehicle, CIFood Black 2, CIDirect Blue 199, CIDi as colorant
It consists of a solution of rect Yellow 86 in isopropyl alcohol (IPA) (concentration: 9% by mass each). [Production of transfer sheet] On a water-swellable support sheet having a thickness of 40 μm containing polyvinyl alcohol and starch as main components,
After forming a waterproof primer layer by applying a coating solution of a nitrified cellulose resin dissolved in a solvent with a gravure roll coat to 10 g / m ² (when dry), it is placed in an ink jet device,
Image processing software corrects the hue, brightness, saturation, and density gradation of the photograph original image captured by the scanner, and the resulting image is applied to the ink jet printing machine to perform ink jet printing. A transfer sheet having a printed pattern layer formed on the surface of the waterproof primer layer was obtained. [Transfer of print pattern to molded article by hydraulic transfer] 13 g / m ^{2 of} an activator having the following composition was coated on the print pattern layer of the transfer sheet, and the support of the transfer sheet was further formed on the water surface at a water temperature of 30 ° C. Float on the water with the seat side facing the water side, 1
After a lapse of a minute, while the support sheet was in a swollen state, a polystyrene resin molded body for an outer frame of an air conditioner was pushed in from above the transfer sheet to spread and adhere to the surface of the molded body.
Next, the polystyrene resin molded body on which the transfer sheet is spread and adhered to the surface is drawn out from the water, showered with warm water at 40 ° C for 30 minutes, and then showered with fresh water to form a support for the transfer sheet made of polyvinyl alcohol and starch. The sheet was removed and then dried to obtain a polystyrene resin molded product having a printed pattern formed thereon. [Activator composition] (a) Butyl cellosolve acetate ... 26 parts by mass (b) Butyl carbitol acetate ... 26 parts by mass (c) Butyl methacrylate polymer ... 8 parts by mass (d) Dibutyl phthalate ... 20 parts by mass (e) Barium sulfate ... 20 parts by mass

Example 2 A transfer sheet was obtained in the same manner as in Example 1 except that the resin used in the composition of the coating solution for the waterproof primer layer was replaced with an acrylic acid-methyl methacrylate copolymer.

Examples 3 to 7 Transfer sheets were obtained in the same manner as in Example 1 except that the resins used in the composition of the coating liquid for the waterproof primer layer were those shown in Table 1 below.

[Table 1]

[0041]

As described above, according to the hydraulic transfer method of the present invention, a transfer sheet can be produced without using a printing plate. It can be manufactured and can be used for small-lot hydraulic transfer, and hydraulic transfer can be performed at low cost.

Further, when the printed pattern layer is formed by the conventional electrostatic printing, there is a problem in color reproducibility because the photosensitive member and the toner are unstable, but the ink jet printing has a color similar to electrostatic printing. There is no problem of reproducibility, good color reproducibility, and an excellent design can be imparted to a molded product.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a transfer sheet used in the hydraulic transfer method of the present invention.

FIG. 2 is a cross-sectional view showing another example of a transfer sheet used in the hydraulic transfer method of the present invention.

FIG. 3 is an explanatory diagram showing the concept of the hydraulic transfer method of the present invention.

[Explanation of symbols]

1 Transfer sheet 2 Support sheet 3 Print pattern layer 4 Waterproof primer layer 5 Water surface 6 Transfer target

Claims (3)

[Claims] 1. A transfer sheet in which a print pattern layer is formed by performing ink jet printing on a water-soluble or water-swellable support sheet, and then the printing is performed on the print pattern layer of the transfer sheet. After applying an activator for imparting adhesive force to the pattern layer, the transfer sheet is floated on the water surface with the support sheet side facing the water surface side, or
After the transfer sheet is floated on the water surface with the support sheet side facing the water surface side, the activator is applied onto the print pattern layer of the transfer sheet to activate the print pattern layer, and then the print pattern layer is activated. A transfer pattern body is transferred onto the surface of the transfer target by pressing the transfer target onto the print pattern layer of the transfer sheet and bringing the print pattern layer into close contact with the transfer-required portion of the transfer target by hydraulic pressure. Water pressure transfer method. 2. A non-water-soluble and non-water-swellable waterproof primer layer is formed on a support sheet, and an ink jet printing is performed on the waterproof primer layer using a water-based ink to form a printed pattern layer. The hydraulic transfer method according to claim 1, wherein a transfer sheet is prepared. 3. A transfer sheet is produced by forming a print pattern layer by performing ink jet printing using a water-based ink and then rendering the print pattern layer water-insoluble and non-water swellable. The described hydraulic transfer method.