JPH07438B2 - Method of painting on molded products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention mainly relates to metal products, plastic moldings,
The present invention relates to a method for painting various molded products such as ceramics molded products by a transfer method, which is capable of performing painting on an extremely wide range of molded products. Even if the subsequent surface coating is omitted, it is possible to obtain a painted molded article having sufficient surface properties, and by adding the surface coating step,
It is intended to provide a method for obtaining a painted molded article having excellent surface properties required for a molded article for exterior use and a molded article to be used as a bath product.

[Prior Art] In particular, as a method of painting with a printing layer on various molded articles having a three-dimensional surface (three-dimensional surface) or a curved surface due to unevenness, an activated printing layer is provided on the surface. A transfer sheet made of a water-soluble or water-swellable film,
A method is known in which the printed layer is floated on the water surface toward the upper surface, a molded body to be painted is pressed in from above, and the printed layer in the transfer sheet is transferred to the outer peripheral surface of the molded body by utilizing water pressure. (Japanese Patent Publication No. 52-41683 and Japanese Patent Laid-Open No. 54-33115).

[Problems to be Solved by the Invention] By the way, in the conventional painting method using hydraulic transfer, a transfer sheet having a printing layer using nitrocellulose alkyd as a binder and a solvent for dissolving the binder are used. Similarly, a combination of nitrocellulose alkyd and an activator in which the nitrocellulose is dissolved is used, and the adhesion of the printing layer in the transfer sheet is poor,
The types of moldings that can be painted are limited.For example, for polystyrene-based moldings, the surface to be painted must be primed in advance and transferred to the surface of the molding. Since the surface properties of the printed layer are not sufficient, a surface coating process after the painting process by transfer is necessary.Even if the surface coating is performed after the painting process, the molded article for exterior or water It has a drawback in that it is not possible to obtain a decorative molded product having surface properties required for a molded product or the like.

[Means for Solving the Problems] A method for painting a molded article according to the first aspect of the present invention is a method in which a printing layer containing a thermoplastic urethane resin as a binder component or a binder main component is formed from a water-soluble or water-swellable film. The transfer sheet obtained by forming the transfer sheet on the surface of the transfer sheet is floated on the water surface so that the printing layer surface of the transfer sheet is the upper surface, and then a thermoplastic urethane resin or an acrylic resin is used. Containing an activator composed of a resin solution having a property of dissolving the printing layer in the transfer sheet, or by applying the activator to the printing layer surface of the transfer sheet. After applying, the transfer sheet is floated on the water surface so that the printing layer surface of the transfer sheet is the upper surface. A first step of forming a state in which the printing layer in the transfer sheet is activated by an activator and being floated on the water surface; and a transfer sheet floating on the water surface. From above,
Pushing in the molded body to be painted, and spreading and adhering the transfer sheet to the outer peripheral surface of the molded body by water pressure,
A second step of adhering the printing layer of the transfer sheet to the surface of the molded body, and removing the transfer sheet base material composed of the water-soluble or water-swellable film of the transfer sheet from the outer surface of the molded body. And a third step of obtaining a molded product in which only the printed layer in the transfer sheet is adhered to the outer peripheral surface, and a target molded product having a surface property excellent in physical properties is obtained. It is a thing.

In the first step, when the resin used in the activator is a thermoplastic polyurethane-based resin, this thermoplastic polyurethane-based resin does not necessarily include the binder component in the printing layer of the transfer sheet. Of course, it does not have to be the same as the formed thermoplastic polyurethane resin.

Further, the method for painting a molded article of the second invention is such that a printing layer containing an acrylic resin as a binder component or a binder component is formed on a transfer sheet substrate surface made of a water-soluble or water-swellable film. The transfer sheet obtained by doing, after floating on the water surface so that the printing layer surface of the transfer sheet is the upper surface, contains an acrylic resin, and further, the printing layer in the transfer sheet. An activator comprising a resin solution having a property of dissolving is applied to the printing layer surface, or after applying the activator to the printing layer surface of the transfer sheet, the transfer sheet is applied to the transfer sheet. The printing layer in the transfer sheet is activated by an activator by floating on the water surface with the printing layer surface facing upward. Yes, moreover, the first step of forming a state of being floated on the water surface, and from above the transfer sheet floated on the water surface,
A molded body to be painted is pushed in, the transfer sheet is spread and brought into close contact with the outer peripheral surface of the molded body by water pressure, and the print layer in the transfer sheet is bonded to the molded body substrate surface. Step, and by removing the transfer sheet substrate consisting of a water-soluble or water-swellable film in the transfer sheet from the outer surface of the molded body, only the print layer in the transfer sheet is adhered to the outer peripheral surface The third step is to obtain a molded product, which is a target product to obtain a decorative molded product having excellent surface physical properties.

In the first step, the acrylic resin used in the activator does not necessarily have to be the same as the acrylic resin forming the binder component in the printing layer of the transfer sheet. Is.

Further, in the method for painting a molded article according to the third aspect of the present invention, a transparent underprinting layer is formed directly on the entire surface of the transfer sheet base material, and is formed on the underprinting layer. By using a transfer sheet having a print layer consisting of a pattern print layer, the method of the first invention or the second method of the present invention is used.
The present invention method is carried out to obtain a decorative molded article which is a target product and has excellent surface physical properties.

Furthermore, the method for painting a molded article according to the fourth aspect of the present invention is that the surface of the molded article obtained by the method according to the first aspect, the second aspect of the invention, or the third aspect of the invention has By coating with a curable polyurethane-based resin or an acrylic resin, a water-resistant painted molded article that can be used as, for example, a wet product or an external molded article is obtained.

In the transfer sheet base material in the transfer sheet used in the first step of each of the methods of the present invention, by floating on the water surface to absorb water and swell, and by pushing an object from above the film floating on the water surface, A film-like material that can be easily spread and deformed according to the shape of an object and that can be subjected to a normal printing process is used. Specifically, polyvinyl alcohol resin, dextrin, gelatin can be used. , Chicken, casein, shellac, gum arabic, starch, protein, polyacrylic acid amide, sodium polyacrylate, polyvinyl methyl ether, copolymer of methyl vinyl ether and maleic anhydride, copolymer of vinyl acetate and itaconic acid, polyvinyl Pyrrolidone, or cellulose, acetyl cellulose, acetyl butyl cellulose, carbo A film having a thickness of about 10 to 100 μm, such as a cellulose derivative such as dimethyl cellulose, methyl cellulose, hydroxyethyl cellulose, and a single or mixed resin such as sodium alginate, or a raw material of the film is paper, nonwoven fabric, cloth, or various porous films. For example, a laminated sheet obtained by coating a gas sheet having a property of immersing a liquid, particularly water, or laminating the water-swellable or water-soluble film on the gas sheet is used.

Incidentally, the polyvinyl alcohol resin film, by varying the polymerization degree, saponification degree, various conditions such as the addition of additives such as starch, the mechanical strength required during printing, humidity resistance during handling, water resistance. It is possible to control the speed of softening due to water absorption after floating, the time required for spreading or diffusing, the ease of deformation during transfer, and the like. An example of a more preferable film based on polyvinyl alcohol (PVA) resin is PVA ………………………… 80% Polymeric water-soluble resin ………… 15% Starch …………………… 5% And the equilibrium water content is about 3%.

The binder resin used in the printing layer attached to the transfer sheet base material may be a thermoplastic urethane resin such as polyester urethane, acrylic urethane, or polycarbonate urethane alone, or a mixed resin of two or more kinds, or Acrylic resins such as methylmethacrylate, polyethylmethacrylate, and polybutylmethacrylate are used alone or as a mixture of two or more kinds, or as the main component of the above-mentioned thermoplastic urethane resin or acrylic resin. A mixed resin in which a cellulose derivative such as cellulose or cellulose acetate, a polyester resin, a binder for addition such as a vinyl chloride / vinyl acetate copolymer resin is mixed is used.

The transparent underprinting layer in the third aspect of the invention includes a printing ink containing the above-mentioned resin as a binder component and containing no colorant, a hydrocarbon resin such as polyethylene wax or paraffin, and a fatty acid. It is formed by a printing ink or the like to which amides, fatty acids, fatty alcohols and esters thereof, etc. are added.

The activator applied to the print layer surface of the transfer sheet contains a thermoplastic urethane resin or an acrylic resin, and has the property of dissolving the print layer of the transfer sheet, for example, Ketones such as cyclohexanone, methylcyclohexanone, isophorone, ethylene glycol 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
Ethers such as di-butyl ether, ethylene glycol mono-methyl ether acetate, ethylene glycol mono-butyl ether acetate, ethylene glycol mono-ethyl ether acetate, diethylene glycol mono-methyl ether acetate,
Diethylene glycol / moto / ethyl ether / acetate, diethylene glycol / mono / butyl ether /
A single solvent composed of acetic acid esters such as acetate, or a resin solution of a mixed solvent is used, and if necessary, an additional solvent such as N.methyl-2.pyrrolidone, acetonylacetone, methyl ethyl ketone, ethyl acetate, etc. A resin solution containing a plasticizer such as texanol isobutyrate, citric acid ester, dioctyl phthalate, dibutyl phthalate, or the like is used.

The added solvent is a solvent having a high dissolving power for the binder component in the printing layer of the transfer sheet, and enhances the activating action of the activator.

Further, the plasticizer has a function of dispersing the resin component in the activator, and has a function of making the resin component in the resin solution layer formed on the printing layer surface uniform by applying the activator. .

The thermoplastic urethane-based resin or acrylic-based resin in the activator used in the method of the present invention has a resin concentration of about 5 to 20 wt.%, For example, gravure coat, offset gravure coat, roll coat, The coating amount is 1 to 50 g / m ² by means of bar coating, spray coating, ultrasonic coating or the like.

In order to float the transfer sheet on the water surface, it is possible to float the sheet-like materials one by one, or the roll-shaped material can be continuously floated on the water surface while flowing water in one direction. In this step, the transfer sheet in the transfer sheet is floated on the water surface so that the surface of the transfer sheet substrate faces downward, that is, the printing layer surface faces upward. It is necessary to prevent air bubbles from entering between the surface of the base material and the surface of the water and to prevent wrinkles from being formed on the transfer sheet itself.

The water used for floating the transfer sheet is adjusted to an appropriate temperature depending on the properties of the water-soluble or water-swellable film as the transfer sheet base material in the transfer sheet. For example, when a starch film (trade name: Oblate) is used as the water-soluble film, the water temperature is
It is desirable that the temperature is about 40 to 50 ° C., and in order to promote dissolution when removing the film, amylase or the like is added to
It is preferable to add about 4%.

In the second step of the method of the present invention, the molded body to be painted is lowered from above the transfer sheet floated on the water surface in the first step, and part or all of the molded body is allowed to settle in water. The transfer sheet is spread along the surface shape of the molded body so that air bubbles do not enter between the transfer sheet and the molded body, and is brought into close contact with the molded body surface by hydraulic pressure.

The second step is performed before the printing layer on the transfer sheet activated by the first step in the method of the present invention is inactivated by drying, that is, the printing layer is wet. Of course, it is carried out before losing the sex.

The molded product used in this step is, for example, a homopolymer of ABS resin, polystyrene resin, polycarbonate resin, AES resin (ABS resin improved weather resistance), polypropylene resin, polyethylene resin, polyphenylene oxide resin, polyvinyl chloride resin, etc. Injection molding, extrusion molding, hollow molding, vacuum molding of synthetic resins, melamine resins, phenolic resins, formalin resins, urea resins, fibrous resins, etc. made of polymers or copolymers or mixtures selected from these. In addition to various synthetic resin molded products such as products, metal products, ceramic molded products, etc. can be used, such as those having concave or convex portions, flat ones, those having two-dimensional or three-dimensional curved surfaces, Most shapes such as those with through holes and grids can be applied. Such as those fine embossing for generating texture such as wood and stone and fabrics are provided may also be used.

In the third step after the print layer in the transfer sheet is sufficiently fixed to the surface of the molded body in the second step, the transfer sheet base material in the transfer sheet, that is, the water-soluble or water-swellable film is removed. It is a thing.

To remove the water-soluble or water-swellable film in the transfer sheet, the most efficient and preferable method is to wash the transfer target with a shower using water, whereby the transfer sheet attached to the molded body is removed. The substrate is completely removed, and the stains generated during transfer are cleaned. The water temperature at this time varies depending on the material of the transfer sheet substrate used, etc., but generally 15 to 60 ° C. is appropriate, and
A washing time of about 1 to 10 minutes is sufficient.

The target product in the first to third invention methods is obtained by transferring the printing layer of the transfer sheet to the surface of the molded body in the third step, and then drying and removing water droplets adhering to the molded body. It is to obtain a molded body which is painted.

In the case of the fourth method of the present invention, the water droplets are dried,
Subsequent to the removing step, the painting surface of the painted body is painted with a predetermined resin, and a normal coating means using a thermosetting urethane resin or acrylic resin as a coating film component. Is used.

[Examples] A specific configuration of the method for painting a molded article of the present invention will be described below with reference to Examples based on the drawings.

Example 1 In FIGS. 1 and 2, 40 parts by weight of polybutyl methacrylate resin was added to the surface of a transfer sheet base material 22 made of a polyvinyl alcohol film [Hiselon C-300 manufactured by Nigo Film Co., Ltd.]. Polyethylmethacrylate resin 50 parts by weight, by using a gravure printing ink having a mixed resin of nitrocellulose 10 parts by weight as a binder component, a pattern printing layer 21 is formed by a gravure printing method, and printing used in the method of the present invention. A transfer sheet 20 having a layer 21 was obtained.

Then, on the surface of the printing layer 21 in the transfer sheet 20, 7 parts by weight of polybutyl methacrylate resin, 45 parts by weight of ethylene glycol monobutyl ether acetate, 45 parts by weight of diethylene glycol monobutyl ether acetate, and N. An activator consisting of a resin solution containing 3 parts by weight of methyl-2.pyrrolidone is coated at a rate of 14 g / m ² by a gravure printing method to obtain the transfer sheet.
The printed layer 21 at 20 was activated.

Before the printing layer 21 in a wet state by the action of the activator is dried, the transfer sheet 20 is placed on a water surface at a water temperature of 30 ° C.
In 23, the printed layer 21 is floated so that the surface is the upper surface, and after the transfer sheet base material 22 in the transfer sheet 20 has swollen, a polystyrene three-dimensional molded body 24 is formed on the transfer sheet 20. By pushing in from above, the transfer sheet 20 was brought into close contact with the polystyrene molded body, and the printing layer 21 of the transfer sheet 20 was transferred to the surface of the molded body 24.

Subsequently, the polystyrene molded body 24 is pulled out from water, and a shower having a water temperature of 30 ° C. is sprayed on the molded body 24 to remove the transfer sheet base material 22 remaining on the surface, and then the blower is used at a temperature of 60 ° C. By drying, the water droplets adhering to the molded body 24 were removed, and a decorative molded body having the printed layer 21 transferred to the surface thereof was obtained.

Thereafter, the printing layer 21 in the obtained molded body is obtained.
By applying an acrylic type coating on the surface, a decorative molded body 26 having an acrylic type coating layer 25 as shown in FIG. 3, which is a target product of the method of the present invention, was obtained.

Incidentally, with respect to the above-mentioned polystyrene three-dimensional molded body 24, in the painting method by the conventional transfer method, painting could not be performed without performing the primer treatment, but in the above-mentioned embodiment, As a result, there was obtained a polystyrene molded article having surface properties superior to those of the conventional polystyrene molded article obtained by the method of performing the primer treatment.

Example 2 Polyvinyl alcohol film [Nigo Film Co., Ltd.]
Manufactured by: Hi-Selon C-300], a transparent solid underprinting layer is formed on the surface of a transfer sheet substrate by a gravure printing ink containing a binder component made of polymethylmethacrylate resin and polyethylene wax. Then, 40 parts by weight of polybutyl methacrylate resin and polyethyl methacrylate resin are formed on the underprinting layer.
50 parts by weight, nitrocellulose 10 parts by weight to form a pattern printing layer by a gravure printing method using a gravure printing ink having a binder component as a binder component, a transfer sheet having a printing layer used in the method of the present invention, Obtained.

Then, 7 parts by weight of polybutyl methacrylate resin, 45 parts by weight of ethylene glycol monobutyl ether acetate, and diethylene glycol monobutyl ether acetate were applied to the surface of the printing layer of the transfer sheet.
An activator consisting of a resin solution of 45 parts by weight and 3 parts by weight of N, methyl, 2 and pyrrolidone was added by a gravure printing method at 14 g /
Coating was performed at a rate of m ² to activate each printing layer in the transfer sheet.

Before each printing layer in a wet state by the action of the activator is dried, the transfer sheet is floated on the water surface at a water temperature of 30 ° C so that the printing layer surface is the upper surface, and the transfer sheet is After the transfer sheet base material in swelling, the three-dimensional molded body made of ABS resin is pressed from above the transfer sheet, and the transfer sheet is brought into close contact with the surface of the molded body made of ABS resin, each of the transfer sheets. The printed layer was transferred to the surface of the molded body.

Then, the ABS resin molded body was pulled out of water, and a shower at a water temperature of 30 ° C was sprayed on the molded body to remove the transfer sheet base material remaining on the surface, followed by drying with a blower at 60 ° C. Then, water drops adhering to the molded body were removed to obtain a decorative molded body having the two types of printing layers transferred to the surface.

The surface properties of the obtained molded article are those that can withstand practical use, and surface properties that are even better than the surface properties of the molded article obtained by the conventional method of undergoing the finishing surface coating process. What has was obtained.

Example 3 Polyvinyl alcohol film [Nichigo Film Co., Ltd.]
Made by: Hycelon C-300], 70 parts by weight of polyester resin and nitrocellulose are formed on the surface of a transfer sheet substrate.
A gravure printing ink containing a binder component of 30 parts by weight of a mixed resin and polyethylene wax is used to form a transparent solid underprint printing layer, and then a polyester urethane resin is formed on the underprint printing layer.
By a gravure printing method using a gravure ink containing 70 parts by weight and 30 parts by weight of nitrocellulose as a binder component, a pattern printing layer is formed, and a transfer sheet having a printing layer used in the method of the present invention is formed. Obtained.

Then, 10 parts by weight of polyester urethane resin, 5 parts by weight of nitrocellulose, 40 parts by weight of ethylene glycol monobutyl ether acetate, and 40 parts by weight of diethylene glycol monobutyl ether acetate, on the printed layer surface of the transfer sheet, N. methyl
An activator composed of a resin solution containing 5 parts by weight of 2-pyrrolidone was coated at a rate of 14 g / m ² by a gravure printing method to activate each printing layer in the transfer sheet.

Before each printing layer in a wet state by the action of the activator is dried, the transfer sheet is floated on the water surface at a water temperature of 30 ° C so that the printing layer surface is the upper surface, and the transfer sheet is After the transfer sheet base material in swelling, the three-dimensional molded body made of ABS resin is pressed from above the transfer sheet, and the transfer sheet is brought into close contact with the surface of the molded body made of ABS resin, each of the transfer sheets. The printed layer was transferred to the surface of the molded body.

Then, the ABS resin molded body was pulled out of water, and a shower at a water temperature of 30 ° C was sprayed on the molded body to remove the transfer sheet base material remaining on the surface, followed by drying with a blower at 60 ° C. Then, water drops adhering to the molded body were removed to obtain a decorative molded body having the two types of printing layers transferred to the surface.

The surface properties of the obtained molded article are those that can withstand practical use, and surface properties that are even better than the surface properties of the molded article obtained by the conventional method of undergoing the finishing surface coating process. What has was obtained.

Example 4 The target product of another method of the present invention is obtained by further applying a urethane two-pack type coating to the painted surface of each of the painted molded bodies obtained in Examples 2 and 3 above. A molded article with a coat provided with the transfer printing layer coated with the coating layer was obtained.

The obtained molded article with water was excellent in water resistance such that it could be sufficiently used as a bath product or an exterior product.

[Operation and Effect of the Invention] In the method for painting a molded article of the first invention, the binder component or the binder main component is thermoplastic to the transfer sheet base material surface made of a water-soluble or water-swellable film. A resin containing a transfer sheet obtained by forming a printing layer made of a urethane resin and a thermoplastic urethane resin or an acrylic resin, and having a property of dissolving the printing layer in the transfer sheet. Using an activator consisting of a solution, by the hydraulic transfer method,
Transfer painting is applied to various molded products.

Further, the method for painting a molded article of the second invention is a printing layer comprising a binder component or a binder component made of an acrylic resin on the surface of a transfer sheet substrate made of a water-soluble or water-swellable film. And a transfer sheet obtained by forming the transfer sheet, and an activator made of a resin solution containing an acrylic resin and having a property of dissolving the printing layer in the transfer sheet. According to the method, transfer painting is performed on various molded products.

Furthermore, the method for painting a molded article according to the third aspect of the present invention is a transparent sheet that is directly formed on the surface of a transfer sheet base material as a transfer sheet when the first to second aspects of the present invention are carried out. The transfer sheet is provided with a printing layer including a simple underprinting layer and a pattern printing layer formed on the underprinting layer.

Thus, in the present invention methods of the first to third aspects, it is possible to obtain a painted molded product in which the transferred printed layer and the surface of the molded product are bonded with a strong adhesive force. There is no limitation on the type of molded product
In addition, for example, in the painting method by the conventional transfer method,
According to the second method of the present invention, even if a polystyrene resin molded body, which has been indispensable or indispensable to be subjected to a primer treatment in advance, has a surface having excellent surface properties without the primer treatment. A molded article is obtained.

The method for painting a molded article according to the fourth invention method is the method for painting a molded article obtained by the first to third invention methods, wherein the painting surface is further heat-cured. A surface coating of a urethane resin or an acrylic resin is applied, and a painted molded article having sufficient water resistance to withstand a water molded article or a molded article for exterior is obtained.

Furthermore, since the above-mentioned respective methods of the present invention utilize the adhesiveness of the transfer sheet due to water pressure, the above-mentioned characteristics can be obtained even for a molded article having a three-dimensional surface (three-dimensional surface) or curved surface due to unevenness It is possible to easily and reliably obtain a painted molded product having the above-mentioned.

[Brief description of drawings]

FIG. 1 is a model cross-sectional view showing an intermediate step in the method for painting a molded article of the present invention, and FIG. 2 is a model cross-sectional view showing a transfer sheet used in the method of the present invention as an embodiment. FIG. 3 is a model cross-sectional view of one example product of a painted molded body obtained by the method of the present invention. 20: transfer sheet, 21: transfer printing layer in transfer sheet 20, 22: transfer sheet base material, 23: water surface, 24: molded body to be painted, 25: coating layer, 26: painting Molded body.

Claims (4)

[Claims] 1. A transfer sheet base material comprising a water-soluble or water-swellable film, and a printing layer containing a thermoplastic urethane resin formed on the transfer sheet base material as a binder component or a binder main component. The transfer sheet consisting of the transfer sheet is floated on the water surface so that the printing layer surface of the transfer sheet is the upper surface, and then contains a thermoplastic urethane-based resin or an acrylic resin, and the printing in the transfer sheet is performed. An activator comprising a resin solution having a property of dissolving a layer is applied to the surface of the printing layer, or after applying the activator to the surface of the printing layer in the transfer sheet, the transfer sheet is used for the transfer. First step of floating on the water surface so that the printing layer surface of the sheet is the upper surface, and above the transfer sheet floated on the water surface Then, the molded body to be painted is pushed in, the transfer sheet is spread and brought into close contact with the outer peripheral surface of the molded body by water pressure, and the print layer in the transfer sheet is bonded to the surface of the molded body substrate. A second step, by removing the transfer sheet base material consisting of the water-soluble or water-swellable film in the transfer sheet to obtain a molded body in which the print layer of the transfer sheet is adhered to the outer peripheral surface; A method for painting a molded article, which comprises three steps. 2. A transfer sheet base material comprising a water-soluble or water-swellable film, and a printing layer containing an acrylic resin formed on the transfer sheet base material as a binder component or a binder main component. A resin having a property of dissolving the printing layer in the transfer sheet, after the transfer sheet is floated on the water surface so that the printing layer surface of the transfer sheet is the upper surface, and containing an acrylic resin. An activator consisting of a solution is applied to the print layer surface, or after applying the activator to the print layer surface of the transfer sheet, the transfer sheet is treated so that the print layer surface of the transfer sheet is the upper surface. The first step of floating on the water surface so that the above, and the molded body to be painted is pushed in from above the transfer sheet floating on the water surface. Hydraulically, spread over the transfer sheet to the outer circumferential surface of the green body is brought into close contact, the second bonding the print layer in the transfer sheet to the compact substrate surface
A third step of obtaining a molded article in which the print layer of the transfer sheet is adhered to the outer peripheral surface by removing the transfer sheet base material composed of the water-soluble or water-swellable film in the transfer sheet A method for painting a molded article, which comprises: 3. The method for painting a molded article according to claim 1 or 2, wherein the printing layer formed on the transfer sheet base material is the transfer sheet base material surface. A method for painting a molded product, comprising a transparent underprinting layer formed directly on the entire surface and a pattern printing layer formed on the underprinting layer. 4. Claims 1, 2 or 3
A method for painting a molded article, characterized in that the surface of the painted article obtained by the method for painting a molded article according to the item is coated with a thermosetting urethane resin or an acrylic resin.