RU2345902C2 - Method of transfer under water pressure and product manufactured by transfer under water pressure - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: decorative layer is hydraulically transferred to product. Composite of resin hardened by ultraviolet radiation, which comprises photopolymerised prepolymer, photopolymerised monomer and photoinitiator, which does not contain dissolvent, is applied on dry printed pattern of transfer film. Product is pushed in water together with transfer film with printed pattern, activated activating component that does not contain dissolvent in composite of resin hardened by ultraviolet radiation.

EFFECT: improved characteristics of decorative layer surface.

5 cl, 29 dwg

Description

FIELD OF THE INVENTION

This invention relates to a method of transferring under water pressure, designed to improve the surface characteristics of a decorative layer, a surface protective layer, or a combination thereof, formed on an article by a method of transferring water under pressure, and to an article formed by a method of transferring water under pressure.

BACKGROUND OF THE INVENTION

A method of transferring under water pressure is a method in which a transfer film having a specific water-insoluble printed pattern deposited on it, applied to a water-soluble film, is sequentially supplied and floats on the surface of the water that flows in the transfer bath and is wetted with water and the product (body , on which the transfer is carried out, or the body on which the drawing is applied) is immersed in water in the transfer bath when it is in contact with the transfer film, so the printed drawing of the transfer film is transferred on the surface of the product using water pressure to form a decorative layer as a result. In the case where the printed pattern is dry, an activating agent is required to be applied to the printed pattern in order to activate the ink of the printed pattern in order to obtain the same wet state of the ink (the state when it has adhesion) as the state of the ink immediately after application print. In order to provide wear resistance, weather resistance (including resistance to solvents, chemical resistance, etc.) of the decorative layer formed by transferring the printed pattern to the surface of the product, it is necessary to form a transparent surface protective layer (top layer) on the decorative layer.

In one of the known sources, said surface protective layer is formed by spraying a UV-curable type of protective coating material onto a decorative layer after transferring the printed pattern, removing the water-soluble film from the surface of the product and drying the product, and then irradiating the UV curable type protective coating material with curing as a result of the protective coating material.

However, the method of applying the protective coating material to the surface of the product by spraying makes it difficult to uniformly apply the surface protective layer to the entire surface of the product and, in addition, causes the buildup of dirt and dust on the decorative layer formed by the transfer of the printed pattern, because the protective layer is applied after the transfer of the printed pattern. washing with water and drying the product. In addition, since ultraviolet radiation irradiates the protective coating material after removing the product from the protective coating material application area, dirt and dust tend to adhere to the decorative layer, which causes deterioration of the surface appearance.

In another known source, a method is proposed in which the transfer of a printed pattern under water pressure and the formation of a surface protective layer are carried out simultaneously (see the first patent document). This method is a method in which a transfer film with a protective layer is formed by applying a transparent or translucent surface protective layer of a water-insoluble resin to a water-soluble film and then a water-insoluble printing layer on the surface protective layer, and the transfer film with a protective layer is transferred under pressure of water to the product ( the body onto which the drawing is transferred).

According to this method, since the surface protective layer and the printing layer on the water-soluble film are simultaneously transferred to the surface of the product when it is in contact with the transfer film using water pressure during transfer under water pressure, this method may not include the steps of applying and curing the protective material coatings after the transfer process, which is required in the first-stated prototype, dust sticking between the decorative layer and the surface protective layer can be avoided, and a small The likelihood that the thickness of the surface protective layer will become uneven.

Thus, this method can be used to advantage, because the surface protective layer is formed while the printing layer is being transferred, therefore the operation steps can be simplified and, in addition, the appearance of the decorative layer never deteriorates, and also the surface protective layer can ensure the wear resistance of the surface of the printed layer of the product, ensuring as a result of its physical protection, because the surface protective layer is formed from a protective substance such as butyl methacrylate or ethylmet krilate, but since the protective substance has low resistance to solvents, the surface protective layer dissolves when it is in contact with various medicines, its protective function decreases and therefore the surface protective layer unfavorably has low weather resistance and poor chemical protection.

Another source of the prior art has been proposed, which is similar to the second source of the prior art, but differs from the latter in that the surface protective layer material of the second prototype is replaced with a UV curable resin, etc. (see patent document 2).

In the third source of the prior art, since a UV curable resin is used for the surface protective layer, etc., it will physically and chemically protect the decorative layer in an efficient manner, but it has some undesirable disadvantages when the adhesion of the printed pattern is restored or reproduced. , which is the uppermost surface of the transfer film, as described below.

In particular, although this is common to the above first to third sources, an activating agent or diluent is applied to the printed pattern and also to the surface protective layer (relative to the third source) of the transfer film to restore the adhesion of the printed pattern and surface protective layer, when transfer, but since the activating agent, or diluent, restores the adhesion of the printed pattern using an organic solvent contained in the activating agent, or diluent, it is required that the time during which the solvent completely evaporates, and the drying conditions are considered as the conditions of the method, and the quality of the product obtained under pressure of water can be adversely affected if the solvent ingredient remains in the printed pattern or surface protective layer. In addition, since the organic solvent evaporates into the atmosphere during work or is absorbed by the human body, using an organic solvent to activate a printed pattern or surface protective layer causes organic air pollution or is harmful to the health of workers, and this becomes a problem that must be solved immediately.

When the inventors tried to directly use such a UV-curable protective coating material as used in the first source, which is also an environmentally acceptable coating material, they could find a restoration of temporary ink adhesion in the printed image of the transfer film, but they also found when trying to continue working in during the method of transfer under water pressure, that transfer becomes poor due to reduced adhesion of the printed pattern. It has been found that by carrying out the same experiment using a UV curable type ink that contains the same UV curable resin composite as the UV curable type protective coating material but does not contain dyes, ink adhesion in the printed pattern can be restored. and that the transfer can be carried out without loss of adhesion even during the transfer process.

In the case of transferring water under pressure, not only the ink in the printed drawing has a returned wet state in order to restore the adhesion of the ink, but also the water-soluble film having the printed pattern deposited on it also becomes moistened with water in the transfer bath, therefore it is required that, as a printed the pattern and the water-soluble film were easily attachable on and around the surface of the product when it was immersed in water. Thus, the product should be immersed in water at the time when the wet conditions of both the printed pattern and the water-soluble film are obtained, and the adhesion of the printed pattern, also intended for attaching the printed pattern to the product, should be maintained until the transfer is complete.

The inventors believe that the difference between these experimental results is due to the difference in the composition of the UV-curable type of coating material and in the type of UV-curable paint, since the products are different when used, although they contain the same resin-curable UV curable composite. In addition, they believe that the difference is that the UV-curable type coating material contains a low boiling point solvent, but the UV-curable type paint usually contains less solvent and therefore, when the UV-curable type coating material is applied to the printed pattern , the initial adhesion of the printed pattern can be restored by the solvent in the coating material, but the adhesion will decrease as a result of evaporation of the solvent, when the transfer is carried out, and since the type of UV-curable ink is solvent-free, any solvent-free composite will serve to restore the printed pattern. This invention was made by repeating various experiments in accordance with the above assumptions.

A method is proposed for transferring a surface protective layer to an article under water pressure using a transfer film having a surface protective layer formed by applying a surface protecting agent, such as a protective coating material or UV curable resin composite, to a water-soluble film and drying it. However, it is also difficult to form a surface protective layer having all the excellent properties of wear resistance, heat resistance and drug resistance by the method of transferring under water pressure, and there are the same problems as in the method of decorating the product by transferring the printed pattern to the product, when the adhesion of the surface protective layer must be restored. .

Patent Document 1 - JP 4-197699 A.

Patent Document 2 - JP 2003-200698 A.

An object of the present invention is to provide a method of transferring water under pressure, intended to impart a transfer layer, such as a decorative layer itself, to a surface protective layer or a combination thereof on a product of mechanical and chemical protective surface functions, such as wear resistance, resistance to solvents, resistance to drugs, weather resistance, etc., simultaneously with the transfer of the transfer layer.

Another objective of the present invention is to provide a method of transferring water under pressure, intended to impart mechanical and chemical protective functions to the surface of the product, such as wear resistance, solvent resistance, drug resistance, weather resistance, etc.

Another object of the invention is a method of transferring water under pressure, which is intended to give sufficient adhesion to the ink on the printed pattern of the transfer film without any organic solvent, as a result of which problems such as air pollution due to the use of an organic solvent and harm to the health of workers can be avoided.

Another objective of the invention is to provide a method of transferring water under pressure, intended for surface treatment without any adhesion of dust or dirt to the decorative layer on the product.

Another object of the invention is to provide an article obtained by transferring under water pressure, obtained by imparting protective functions to the surface of mechanical and chemical protection of the transfer layer, such as a decorative layer, a surface protective layer, or a combination thereof on the product simultaneously with transfer of the transfer layer.

Another object of the invention is to provide a product obtained by transferring water under pressure, without dust attached to it without any problem of air pollution and harm to the health of workers, as a result of which the product is of good quality.

Another object of the invention is to provide an article obtained by pressure transfer of water having excellent surface protective properties.

Another object of the invention is to provide a product obtained by transferring under water pressure, intended to have protective surface properties imparted to the product, without any problem of air pollution and harm to the health of workers.

Disclosure of the invention

In accordance with a first aspect of the invention, there is provided a method of transferring water under pressure, comprising the steps of wetting the transfer layer of the transfer film having said transfer layer in a dry state on a water-soluble film and then immersing the product together with said transfer film under water so that the surface of said product with force superimposed on the specified transfer layer, and the specified transfer layer is transferred under the influence of water pressure on the specified surface of the specified product, excellent characterized in that the said transfer layer is coated as a composite based on a solvent-free resin, curable by ultraviolet radiation or electron radiation, including a photopolymerizable monomer (resin-cured composite) to wet the transfer layer, after which the transfer layer is transferred, the specified the product is irradiated with ultraviolet radiation or electron radiation to cure said resin curable composite, whereby azannoy surface of said article formed by the transfer layer.

According to a first aspect of the invention, said transfer layer may be a printed pattern where a decorative layer is formed on the surface of said product, it may be a combination of a printed pattern and a surface protective layer underneath said printed pattern, wherein a decorative layer having a surface protective layer is formed on the surface of the product or it can be a surface protective layer, and a surface protective layer is formed on the surface of the specified product.

According to a first aspect of the invention, in the case where the transfer layer is an ink-based printing pattern, the adhesion of the printing pattern can be completely restored using an activating, solvent-free resin component cured by ultraviolet radiation, which can usually be a photopolymerizable monomer, so that the adhesion has the same degree as the printed pattern immediately after the printed pattern is applied to the water-soluble film.

Since the restoration of adhesion can be carried out without any organic solvent, there is no problem of air pollution or harm to the health of workers associated with the use of an organic solvent.

Because the resin-based composite cured by ultraviolet radiation with a solvent-free activating component, such as a photopolymerizable monomer, cures in a state where it penetrates the ink of the printed pattern, so that it mixes with the ink, and therefore in a state where the solvent-free composite UV cured resin is fully integrated with the printed pattern; the decorative layer on the product itself has mechanical and chemical protective functions Such as wear resistance, solvent resistance, durability and weather resistance to drugs, and others in addition.

Since the first aspect of the invention is to restore the adhesion of the transfer layer to a solvent-free activating component of a resin-curable resin, UV-curable, solvent-free type, there is no problem of air pollution or harm to the health of workers associated with the use of an organic solvent. In addition, since the UV-curable resin composite and the transfer layer cure when they are fully combined with each other, in the case where the transfer layer is in combination with a printing pattern and a surface coating layer, the decorative layer on the product itself has mechanical and chemical protective functions of the surface, such as wear resistance, resistance to solvents, resistance to drugs and weather resistance, and others in addition to this.

The surface of the decorative layer can be completely protected by the top layer transferred under water pressure to the decorative layer at the same time that the latter is transferred together with the protective functions of the surface, such as resistance to solvents, etc. imparted to the decorative layer, and in addition to this, since one part of the composite based on a resin cured by ultraviolet radiation also penetrates the upper protective layer to restore adhesion, the adhesive properties of the upper layer and the decorative layer could t be improved. Especially when the top layer consists of a UV curable resin composite, mechanical and chemical protection can be enhanced by combining the UV curable resin composite fully combined with the decorative layer when applied to restore its adhesion and the resin composite cured by ultraviolet radiation of the upper layer. The top layer gives depth to the appearance of the product.

In accordance with a second aspect of the invention, there is provided a water pressure transfer article having a surface obtained by a water pressure transfer method according to the invention.

Brief Description of the Drawings

Figure 1 presents a diagram that briefly illustrates the method of transferring water under pressure, used in this invention.

Figure 2 shows a method of transferring water under pressure in accordance with the first aspect of the invention in the order of the stages, figure 2A shows a cross section of a transfer film, figure 2, B shows a cross section of a state where a solvent-free composite based on UV curable resin is applied to the transfer film, FIG. 2, C shows the cross section of the state when the transfer film of FIG. 2, B floats on the surface of the water, FIG. 2, D shows the cross section of the state directly just before the product onto which the printed pattern is transferred under water pressure is immersed in water, Fig. 2, E shows a cross section of the state when ultraviolet radiation irradiates the product after transferring under water pressure, Fig. 2, F shows the transverse a section of the state when the water-soluble film is washed with water, and FIG. 2, G shows a cross section of the state when the surface of the article is dried.

Figure 3 presents an enlarged cross section of the product obtained by the method of the invention shown in figure 2.

Figure 4 partially shows the stage of applying the top layer to the product of Figure 3 using the method of transferring water under pressure according to the third form of the invention, Figure 4, A is a cross-sectional view of the transfer film for the top layer, and Figure 4, B a cross section of the state is shown immediately before the product of FIG. 3 is immersed in water in order to apply the top layer to the product using the transfer film of FIG. 4, A.

Figure 5 presents an enlarged cross section of the product with the upper layer obtained by the method shown in figure 4.

6 is a diagram that briefly illustrates a method for transferring water under pressure in accordance with a second aspect of the invention.

Fig. 7 shows a method of transferring water under pressure from Fig. 6 in the order of stages; Fig. 7 A shows a cross section of a transfer film; Fig. 7 B shows a cross section of a state when a UV curable resin composite is applied to the transfer film, FIG. 7, C shows the cross section of the state when the transfer film of FIG. 7, B floats on the surface of the water, FIG. 7, D shows the cross section of the state just before the product on which printed drawing is transferred under water pressure, it is immersed under water, in Fig. 7, E shows a cross section of the state when ultraviolet radiation irradiates the product after transferring under water pressure, in Fig. 7, F is a cross section of the state when a water-soluble film is washed with water, and in Fig. .7, G shows the cross section of the state when the surface of the product is dried.

On Fig presents an enlarged cross section of the product obtained by the method shown in Fig.7.

FIG. 9 shows a method of transferring a surface protective layer in accordance with the invention under water in the order of steps, FIG. 9, A shows a cross section of a transfer film with a surface protective layer, FIG. 9, B shows a cross section of the state when the composite UV curable resin is applied to the surface protective layer of the transfer film; FIG. 9, C is a cross-sectional view of the state when the transfer film of FIG. 9, B floats on the surface of the water; FIG. 9, D represents the cross section of the state is shown immediately before the undecorated product, onto which the surface protective layer is transferred under water pressure, is immersed in water, Fig. 9, E shows the cross section of the state when ultraviolet radiation irradiates the product after the transfer under water pressure, Fig. .9, F is a cross section of the state when the water-soluble film is washed with water, and FIG. 9, G is a cross section of the state when the surface of the product is dried.

Figure 10 presents an enlarged cross section of the product obtained by the method shown in figure 9.

Figure 11 shows an enlarged cross section of a product obtained by a method identical to the method shown in figure 9, but when transferring the surface protective layer under water pressure to a decorated product.

The best way of carrying out the invention

When describing embodiments of the invention with reference to the drawings, FIG. 1 briefly shows a method of transferring water under pressure in accordance with a first form of the invention. In a first embodiment of the invention, the transfer layer of the transfer film 16 is described as a print pattern 12. This water pressure transfer method includes a method where the transfer film 16 comprising a water-soluble film 14 having a print pattern 12 deposited thereon floats on water 18 in a transfer bath ( not shown) with a printed pattern directed upwards, and the product 10 for transferring a printed pattern to it under water pressure is immersed under water through a transfer film 16, as a result of which the transfer under water pressure is carried out.

The water-soluble film 14 is formed from a water-soluble material having a main ingredient, for example, polyvinyl alcohol, which is moistened and softened by absorbed water. The specified water-soluble film 14 is softened by contact with water in the transfer bath and wound around the decorated product 10, so transfer can be carried out under water pressure. The printed pattern 12 can be applied to the water-soluble film 14 by intaglio printing, etc. in the case of normal transport under water pressure. It should be noted that the term “printed pattern” 12 includes one plane (not having a pattern) other than the plane originally having the pattern.

The method in accordance with the first form of the invention consists in applying (or coating) a composite based on a resin that is curable by ultraviolet radiation, without solvent, onto a dry printed pattern 12 of a transfer film 16 soaked in a printed pattern 12 before transferring the printed pattern to the article under water pressure. An example of specific stages of a method of transferring under pressure the water of the invention is shown in FIG. In the form shown in FIG. 2, operation begins with the state that the printing pattern 12 printed on the water-soluble film 14 is in a dry state (see FIG. 2, A). Although not shown, in practice, the transfer film 16 is in the form of a roll obtained by pre-printing the printed pattern 12 onto an elongated water-soluble film 14 and drying the printed pattern 12. The transfer film 16 can be used when the film is continuously fed from the roll or when it is cut after.

In the form of FIG. 2, a solvent-free resin-based composite cured by ultraviolet radiation, type 20A, is applied to the dry printed pattern 12 of the transfer film 16 of FIG. 2, A (see FIG. 2, B), the transfer film 16 floats on water 18 in the transfer bath in a state where the printing pattern 12 is activated by a solvent-free resin-based composite, UVA curable type 20A, with the restoration of the adhesion of the printing pattern 12 (see FIG. 2, C), then the product 10 together with the transfer film 16 is immersed water so to transfer a printed pattern 12 containing a solvent-free resin-based composite cured by type 20A ultraviolet radiation onto the surface 10S of the article (see FIG. 7, D), and ultraviolet radiation 22 irradiates the article 10 onto which the printed pattern 12 containing the composite is transferred a solvent-free resin curable with ultraviolet radiation, type 20A, resulting in a type 20A non-solvent resin cured with ultraviolet radiation, type 20A is cured (see figure 2, E). Although not shown in the drawings, the article 10 can be immersed in water when it is transported by a conveyor similar to the inverse triangle, or supported by the arm of a robot. In some cases, the step of applying a resin-based composite without a solvent that cures with ultraviolet radiation, type 20A, onto printed pattern 12 (see FIG. 2, B) and the step of floating the transfer film 16 on water (see FIG. 2, C) can be performed in the opposite which is why, therefore, a solvent-free UV-curable composite, type 20A, can be sprayed onto a printed pattern of a transfer film 16 that floats on water so as to restore the adhesion of the printed pattern 12.

By the term “UV curable resin” is meant a resin cured by the chemical action of ultraviolet radiation for a relatively short time, and it takes the form of a UV curable type coating material, a type of UV curable paint, type UV curable adhesives, etc. in accordance with its use. These agents include (1) a photopolymerizable prepolymer, (2) a photopolymerizable monomer and (3) a photoinitiator (optical initiator) as required ingredients.

Conventional UV-curable paint of the type does not have solvents introduced into it and is mixed with a photopolymerizable monomer, which serves as a diluent. The "UV curable resin composite" which is the subject of the invention is mainly mixed with a photopolymerizable prepolymer, a photopolymerizable monomer and a photopolymerization initiator, despite the form of using the UV curable resin, and also has the form of a liquid state prior to UV curing without any solvent introduced.

The term "UV curable resin composite" used in the invention is understood to mean that it excludes a UV curable resin composite having a solvent contained therein and is limited to a solvent free UV curable resin composite having no solvent introduced. This is because the adhesion of the printed pattern of the transfer film is restored by the solvent-free activating component in the solvent-free resin-based composite, cured by ultraviolet radiation, which is usually a photopolymerizable monomer. The UV curable resin composite for the first embodiment of the invention contains an ingredient having the following composition:

(1) Oligomer (photopolymerizable prepolymer) 30-50 wt.% (2) Multifunctional Acrylate (photopolymerizable monomer) 10-30 wt.% (3) Single Function Acrylate (photopolymerizable monomer) 10-40 wt.% (4) Photopolymerization Initiator 0.5-5 wt.% (5) Non-reactive additives 1-20 wt.%

A photopolymerizable prepolymer is a polymer that can be further cured by photochemical exposure and is called a “photopolymerizable unsaturated polymer”, “base resin” or “photopolymerizable oligomer”. The specified prepolymer is the main ingredient that acts on many basic physical properties as a film coating after curing, and the acrylic oligomer, polyester oligomer, epoxy acrylate oligomer and urethane acrylate oligomer can be used independently or in any combination. Although the degree of polymerization of the photopolymerizable prepolymer is not as high as that of the final polymer, it is not a monomer and is somewhat polymerized, therefore, it has a suitable viscosity and therefore a diluent is required, taking into account the operational efficiency when using it.

The photopolymerizable monomer serves as a diluent for the photopolymerizable prepolymer while maintaining the practical effectiveness of the resin composite and is itself involved in the polymerization. There is a single-functional monomer having one functional group, and a multi-functional monomer having two or more functional groups. The single-functional monomer serves to improve adhesion to the product and soften the film coating after curing, and the multi-functional monomer serves as a bridging agent that cross-links the prepolymer molecules. For example, polyacrylate, such as polymethyl acrylate, is used to facilitate the seated effects of the coating membrane caused by bridge formation. If the shrinkage force of the coating membrane becomes high, the adhesion of the coating membrane is reduced, but polyacrylate can successfully prevent this. These photopolymerizable monomers serve as a diluent for regulating the viscosity of the composite by UV curable resin, and also serve as a functional ingredient (activating ingredient) to restore the adhesion of a dry printed pattern.

The photopolymerization initiator serves to absorb ultraviolet radiation at the beginning of the polymerization reaction and is also called the “photopolymerization start agent”. When the curing reaction by ultraviolet radiation is a radical reaction, acetophenone, benzophenone, etc., can be used, while diazocompounds, etc. may be used when the UV curing reaction is an ionic reaction.

A UV curable resin composite can have a sensitizer, a filler, an inactive organic polymer, a leveling agent, a thixotropic additive, an agent that prevents thermal polymerization, etc.

Although the step of applying a solvent-free UV curable resin composite, 20A can be carried out using either a deep photo roller, metal wire coating, or spraying, since the spraying process consumes a large amount of coating material, it is preferable to apply the coating coating with a deep photo roller or with metal wire.

When a solvent-free UV-curable resin composite of type 20A is applied to a printed pattern 12, a photopolymerizable solvent-free UV-curable resin composite of type 20A penetrates the dry ink of the printed pattern 12 with dissolving the ink, therefore, the adhesion of the ink can be restored, which is in the same wet state as immediately after applying the printed pattern. Therefore, a solvent-free UV-curable resin composite of type 20A may have a function equivalent to that of a traditionally used activating agent, and thus excluding the application of an activating agent, diluent, etc., and since each ingredient of the resin composite cured by ultraviolet radiation, including photopolymerizable monomer, usually has a volatility significantly lower than solvent, etc., and the degree of restored adhesion does not change It does not decrease and does not decrease after its recovery, which provides the expectation of stabilization of activation, which cannot be expected in a composite containing a solvent.

When the printed pattern 12 is transferred to the product 10 and the ultraviolet radiation 22 irradiates it, the resin-based composite cured by ultraviolet radiation cures in a state where each ingredient of the composite 20A, such as the photopolymerizable monomer, penetrates the ink of the printed pattern 12, therefore, as a composite, so the paint is completely combined. This gives the decorative layer itself the function of mechanical protection of the surface, such as wear resistance, etc., and the function of chemical protection of the surface, such as resistance to solvents, resistance to medicines, etc. Functions such as functions of the first form of a variant extend to this. Since the photopolymerizable monomer itself participates in the polymerization after irradiation with ultraviolet radiation, this monomer never separates, becoming unusable after that.

2, B and 2, C do not show the state when the ink ingredient of the printed figure 12 and the UV-curable resin composite 20A are completely combined, however, if you try to show this state in these figures, then you will not be able to distinguish between them from a friend, and it should be understood that they are in a state of layers.

After the product having the printed pattern 12 translated onto it is irradiated with ultraviolet light 22, a water shower 24 is injected onto the water-soluble film 14 of the transfer film 16 to rinse the water-soluble film 14, as shown in FIG. 2, F, whereby the water-soluble film 14 removed from the surface of the product 10. After this, as shown in FIG. 2, G, the surface of the product 10 onto which the printed pattern 12 is adhered, containing a resin-based composite that is UV curable, 20A, is treated with hot air 26 to drying the surface of the product 10, as a result of which the product 10 ′ having the decorative layer 30 is considered to be made (see FIG. 3).

Ultraviolet irradiation is preferably carried out when the water-soluble film 14 of the transfer film 16 is wrapped around an article 10 onto which a printing pattern 12 comprising a resin-curable composite cured by ultraviolet radiation 20A is transferred, and thus, the irradiation is preferably carried out immediately after the article 10 leaves from water or before the water-soluble film 14 is washed with water and removed, even if it comes out of the water. UV irradiation 22 is carried out using known curing equipment, which includes a light source, such as high pressure mercury lamps or metal halide lamps, and a housing. Irradiation of the product 10 with ultraviolet 22 can also be carried out when the product is under water, since the ultraviolet ray penetrates through water.

As UV irradiation 22 is conducted while the water-soluble film 14 is wrapped around the article, dirt and others can adhere to the article, therefore, before the printed pattern 12 is completely dry, the possibility of dirt sticking can be reduced by removing the water-soluble film 14 by as the printed pattern 12 cures, it is easy to obtain a decorative layer 30 of good appearance. Irradiation with ultraviolet 22 can be carried out after the water-soluble film 14 is washed with water from the product 10 in the case when the irradiation is carried out in conditions where there is no dust or dirt, for example in a clean room.

The reason for using the UV-curable resin composite without the solvent in this invention, but not the UV curable resin composite with the solvent added thereto, is as follows.

Since the UV curable resin is cured by irradiation with UV radiation for a short period of time, if the solvent introduced is a low boiling solvent having high volatility, the solvent completely evaporates before the product is submerged under water, thereby creating poor transfer due to lack of adhesion, whereas if the solvent introduced is a high boiling low volatile solvent, a lack of adhesion can be avoided by yes the product is immersed in water, but ultraviolet irradiation cannot be carried out until the solvent has completely evaporated, and if the UV curable resin cures upon irradiation with ultraviolet radiation in an inadequate volatilization state of the solvent, which is in a state when the solvent is turned on , later defects such as surface roughness are obtained. Thus, if a UV curable resin composite is used having a solvent incorporated therein that is either low boiling point or high boiling point, there is a possibility of harm to health due to air pollution or absorption by the human body, as well as various problems processing and quality.

On the other hand, as has already been partially described, if a solvent-free resin-based composite curable by ultraviolet radiation is used, since the photopolymerizable monomer can also serve as a diluent in order to control the viscosity, a larger amount of solvent-free resin-based composite can be obtained. UV curable compared to a solvent containing type. This ensures that adequate and stable adhesion is restored only under the influence of a solvent-free activating ingredient in a UV-curable resin composite that does not contain a solvent of the type that is typically a photopolymerizable monomer. In addition, since the UV-curable resin composite 20A and the printing pattern 12 are completely combined with each other and cured, and the photopolymerizable monomer itself, which has a function equivalent to that of a conventionally used solvent, is involved in polymerization, said photopolymerizable monomer never detaches, deteriorating after that.

In a first embodiment of the invention, using the method of FIG. 4, an upper layer of UV curable resin can be formed as a result of a separate step of pressure transfer of water on a decorative layer obtained by pressure transfer of a printed pattern 12 activated by a UV curable composite resin 20A so as to cover the decorative layer. The operation of applying the upper layer by transferring under water pressure is carried out using a transfer film 116 having a transparent resin-based composite, curable by ultraviolet radiation, 120A, formed by applying in a state of continuous coloring (state without a pattern) over the entire surface of a smooth water-soluble film 114, as shown in Fig.6. The specified transfer film 116 floats on the surface of the water immediately after applying the composite based on a resin, curable by ultraviolet radiation, 120A and at the time when the water-soluble film 114 is properly moistened, the product 10 ′, having a decorative layer deposited on it, is immersed in water 118 Then, irradiation with ultraviolet radiation, washing with water and drying are carried out similarly to the steps in FIGS. 2, E and the following figures, which are carried out by pressure transfer decoration. water, resulting in a product of transfer under water pressure 110 ′ having an upper layer formed by coating the upper layer of UV curable resin 130 (see FIG. 5).

The operation of applying the top layer for transferring under water pressure can be carried out using a transfer film having a UV-curable resin composite formed by pre-curing so as not to cause blocking after applying the UV curable resin composite in a continuous state colorings (state without drawing) on a smooth water-soluble film 14 to a greater extent than the application of a composite based on a resin that cures in trafioletovym radiation solid color just before swimming on water surface. In this case, a UV-curable resin composite that does not contain a solvent or an ingredient of a photopolymerizable monomer can be applied to a UV curable resin composite, a transfer film in a solid color before floating it on the surface of the water, thus restoring the adhesion of the curable UV radiation resin, and then the stages of figure 4, C can be carried out similarly to the transfer operation under pressure of water for decoration.

The upper layer 130, applied to the decorative layer 30 in this manner, gives depth to the appearance of the decorative layer 30, and in addition to this, the mechanical and chemical protection of the surface of the decorative layer 30 is further improved.

In the implementation of the first embodiment of the invention, various advantages can be obtained by using a composite based on a resin, curable by ultraviolet radiation, not containing a solvent type. The term “solvent-free type” in the UV curable resin composite used by the present invention does not mean that there is an absolute zero of “solvent ingredient”, but a composite having a solvent ingredient introduced in order to avoid of the invention, or having a solvent ingredient used to prepare the monomer or prepolymer, but left if the function of restoring the adhesion of the printed pattern to solvent-free can be obtained Activate ingredient in the composite resin curable by ultraviolet radiation, which is typically a photopolymerizable monomer in a necessary and full degree. Similarly, the term “solvent-free type” does not mean that there is an absolute zero “volatility” of the photopolymerizable monomer, but does not mean that it is as high as the solvent, and therefore it can have volatility to the extent that can be neglected. In addition, it should be understood that although the transfer operation under water pressure requires installation and equipment costs or safety control, instead of a composite based on a resin curable by ultraviolet radiation, an electron-curable resin composite can be used because the electron-curable composite the resin contains a photopolymerizable prepolymer and a photopolymerizable monomer as mandatory ingredients that may not include a photopolymer initiator erizatsii composite resin upon irradiation of high energy electron radiation, it has the function of activating the photopolymerizable monomer, polymerization monomer itself participates in polymerization serving like the original composite resin curable by ultraviolet radiation comprising a photopolymerization initiator.

Option 1

In a specific example (option 1) according to a first form of an embodiment of the invention, a solvent-free UV curable resin composite is used, which is a UV curable type paint, commercially available as “UV MAT-000 MREDIUM”, a trademark for paint UV-type screen printing from TEIKOKU INK MANUFACTURE CO., LTD., Japan, and the method is carried out in the order of the steps shown in FIG. 2, A-2, C. The specified resin-based composite, UV-curable, solvent-free type is applied (or coated) to the printed pattern of the transfer film by coating method with removing excess wire rod even before the transfer film is introduced into the transfer bath. A transfer film having a solvent-free UV curable resin-coated composite in this manner floats on the water surface of the transfer bath, and after the printed pattern restores its adhesion to the UV curable resin composite, the product is immersed water through the transfer film, as shown in figure 2, D. After the transfer, the product is taken out of the water, then the product is irradiated with ultraviolet radiation and washed with water and dried to obtain the product (product) transferred under water pressure 10 ′, as shown in FIG. 3.

Option 2

In option 2, the method is carried out in the same manner as in option 1, except for the use of UV curable resin as a UV curable paint of the type available under the brand name "UV PAL-000 MEDIUM, MREDIUM", a traditional brand UV screen printing inks from TEIKOKU INK MANUFACTURE CO., LTD., Japan.

As for the description of the state of transfer in each of the options, the transfer under water pressure can be carried out in the same way as the traditional method, except that the operation of applying the resin composite to the transfer film is performed with some difficulty due to the high viscosity of the resin composite, because it the market is used as is.

The adhesion of the decorative layer of each of the products under pressure transfer of water (E) obtained according to options 1 and 2, is determined by the method of lattice notch tape (10 mm, 100 measurements), and it was confirmed that each of the products (E) options has the same adhesion as a water pressure transfer product (B) having a printed pattern transferred by a traditional activator but not having an upper layer, and a water pressure transfer product (C) having a traditional acrylic resin deposited on a decorative layer.

As a test for resistance to solvents, a reciprocating wipe of the surface of the product is carried out with a ten fold folded mesh material containing xylene eight times, and it was confirmed that the product of any of the options has a slight destruction of the decorative layer, which is not as good as that of a water pressure transfer product (C) having a conventional top layer and exhibits solvent resistance as good as a traditional water pressure transfer product (C). A traditional water pressure transfer product (B), obtained by activation with a traditional activating agent and not having a top layer applied thereto, has very poor solvent resistance, which is usually expected.

These results confirm that when using a composite based on a UV curable resin that does not contain a solvent type, although adjustment is required to have the proper composition for the primary accurate transfer, the printed pattern of the transfer film can be activated to the state of possible transfer by a photopolymerizable monomer, and that the UV curable resin composite and the printed pattern cure when they are fully combined, after irradiation with ultraviolet radiation, as a result of which the resulting decorative layer can be given mechanical and chemical protective functions of the surface, such as wear resistance and resistance to solvents.

6 shows a method of transferring water under pressure in accordance with a second form of an embodiment of the invention. In a second embodiment of the invention, the transfer film 16 comprises a protective layer 40 for a topcoat and a decoration print 12 applied to the water-soluble film 14. This method of transferring water under pressure is a method in which the transfer film 16 is supplied and floats on water 18 in a bath transfer (not shown) so that the printed pattern 12 is directed upward, and the product 10 for transferring the printed pattern 12 under water pressure is immersed in water 18 through the transfer film 16 with the result of transfer under pressure Water Niemi. The water-soluble film 12 may be the same as used with the first embodiment.

Although the top protective layer 40 may be a composite such as a suitable dry cure coating material and other composites having wear and chemical resistance, it may preferably be a transparent paint or a UV-curable resin composite, and more preferably a resin-based composite curable by ultraviolet radiation, solvent free type, which is the same as the material for restoring the adhesion of the printed figure 16, as described below. The specified protective layer 40 can be applied to the entire surface of the water-soluble film 14 by a suitable application method. In a typical water pressure transfer, a printed pattern 12 can be applied to the backing layer 40 on the water-soluble film 14 by deep photo printing or other suitable method. The specified print pattern 12 also contains a smooth (no print) print layer other than the print in the exact value. In the case where the top protective layer 40 is formed from the UV curable resin composite, the printing pattern 12 is applied in a pre-drying state of the resin composite and therefore the printing pattern 12 may preferably be applied by an ink injection system.

Also in the second form of the embodiment, the solvent-free UV resin curable composite can be applied to restore the adhesion of the printed pattern 12 of the transfer film 16. A specific example of a method of transferring water under pressure in accordance with the second form of the embodiment is shown in FIG. 7, and the protective layer 40 and the printed pattern 12, deposited on the water-soluble film 14, are in a state when they are dry (see Fig.7, A).

When transferring under water pressure, a UV-curable resin-based composite solventless type 20A is applied to the dry printed pattern 12 of the transfer film 16 (see FIG. 7B). In a state where the adhesion of the printed pattern 12 is restored by a solvent-free UV-curable resin composite, type 20A, the transfer film 16 floats on water 18 in a transfer bath (see FIG. 7, C). Then, the product 10 is immersed in water together with the transfer film 16 so that the printed pattern 12 containing the resin-based composite cured by ultraviolet radiation 20A adheres to the surface 10S of the product 10 (see Fig. 7, D), resulting in the printed pattern 12 containing a UV-curable resin composite 20 and a top protective layer 40, and then the product 10 is irradiated with UV 22, so a printed pattern 12 containing a UV-curable resin composite m radiation, 20A and the protective layer 40 on top of the cured resin composite (see Figure 7 E). In the case where the protective layer 40 is formed from a UV curable resin composite, the UV curable resin composite, the protective layer 40 is completely cured by the indicated ultraviolet radiation together with the UV curable resin composite, 20A for restoration of adhesion. In order to clarify that the protective layer 40 cures together with the UV curable resin composite to restore adhesion by the ultraviolet irradiation step, a description will be made of the protective layer formed from the UV curable resin composite.

Although not shown, the product is in practice immersed in water when it can be transported by a conveyor similar to the inverse triangle, or supported by the arm of a robot. In some cases, the step of applying a solvent-free UV curable resin composite of type 20A to printed pattern 12 (see FIG. 7, B) and the step of floating the transfer film 16 on water (see FIG. 7, C) may be performed in the reverse order, and the resin-based composite cured by ultraviolet radiation 20A can be sprayed onto the printed pattern 12 of a transfer film 16 that floats on water, with the restoration of the adhesion of the printed pattern.

"UV curable resin composite" excludes a UV curable resin composite containing a solvent of a type similar to that used for the first form of embodiment, and is therefore limited to a solvent free curable ultraviolet resin composite type having no solvent introduced therein. The reason for this is that the adhesion of the printed pattern and the protective layer for the topcoat is restored based on a solvent-free activating component in a resin-based composite that is UV curable and does not contain a solvent of the type that can typically be a photopolymerizable monomer. The UV curable resin composite useful in the present invention contains an ingredient that has the following composition. Since the indicated ingredient is the same as that used for the first form of embodiment, a detailed explanation is omitted.

(1) Oligomer (photopolymerizable prepolymer) 30-50 wt.% (2) Multifunctional Acrylate (photopolymerizable monomer) 10-30 wt.% (3) Single Function Acrylate (photopolymerizable monomer) 10-40 wt.% (4) Photopolymerization Initiator 0.5-5 wt.% (5) Non-reactive additives 1-20 wt.%

When a solvent-free UV-curable resin composite of type 20A is applied to printing figure 12, a photopolymerizable monomer, which is a solvent-free ingredient in a solvent-free UV-curable resin composite of type 20A, penetrates dry the ink of the printed figure 12, as well as at least part of the protective layer 40 for the top with their dissolution, therefore, adhesion can be restored, which is in the same condition an important state, such as the printed pattern 12 and the protective layer 40 immediately after applying the printed pattern 12 and applying the protective layer 40. Thus, as described in the first form of the variant, functions identical to those of a traditional activating agent can be realized. Application of an activating agent, diluent, etc. may be excluded. Since each ingredient in UV-curable resin composites, such as photopolymerizable monomer, usually has a significantly lower volatility than solvent, etc., the degree of restored adhesion does not change or decrease, so it can be expected that the activation of the printed pattern is made stable.

When the article is irradiated with ultraviolet radiation 24 after transferring the printed pattern 12 onto it, each ingredient of the resin-curable resin composite 20A, such as the photopolymerizable monomer, penetrates the ink ingredient of the printed pattern 12 and the protective layer 40 for the top, therefore, the composite is based on UV curable resins 20A and the ink ingredient of the printed pattern 12 cure when fully combined, and also a resin curable composite ultraviolet ray 20A, and at least part of the protective layer 40 for the top cured in a state where they are fully combined. Thus, the functions of mechanical protection of the surface, such as wear resistance, etc., and the functions of chemical protection of the surface, such as resistance to solvents, resistance to drugs, etc., are also imparted to the decorative layer itself, and the adhesion of the protective layer can also be improved. 40 for the top to printed pattern 12 for the decorative layer. At the same time, when the UV curable resin composite 20A is cured by ultraviolet radiation, the UV curable resin composite also cures the protective layer 40. In FIGS. 7, B and 7, C, although the ink ingredient of printed figure 12, top layer ingredient 40 and UV curable resin composite 20A are not shown in a state where they are fully combined, it should be understood that they are shown conveniently in a layered state, sweat that they cannot be distinguished when trying to be shown in the combined state in these figures. In addition, as already described, since the photopolymerizable monomer itself participates in the polymerization, it never separates, which prevents unfit afterwards.

Then, as shown in FIG. 7, F, a water shower 24 is introduced to rinse with water, thereby removing the water-soluble film 14 of the transfer film 16 that the product is coated on. Then, as shown in FIG. 7, G, a stream of hot air 26 blows around the article 10 onto which the printed pattern 12 and the topcoat layer 40 are transferred, containing a UV cured resin composite, 20A, with surface drying articles 10, therefore, a product 10 ′ is obtained having a decorative layer 30 and a top layer 32 (see FIG. 8).

Thus, when the decorative layer 30 and the upper layer 32 are provided, the upper layer 32 gives depth to the appearance of the decorative layer 30, and the mechanical and chemical protection of the surface of the decorative layer 30 is further enhanced.

Option 3

In a specific example (option 3), in accordance with the second form of an embodiment of the invention, on a smooth water-soluble film having polyvinyl alcohol as the main ingredient, a mixture of material commercially available under the trademark "KLCF IMPROVEMENT 3 MEDIUM" is applied (or coated) uniformly over the entire surface and ethyl acetate (THE INTEC CO., LTD, Japan) in a 1: 1 ratio as a protective layer for the top using a coating machine to remove excess with a wire rod having a wire diameter of 12 mm and wire number No. 8, and after natural drying in an atmosphere with a normal temperature for 10 minutes, a brush tip is randomly applied manually using an alkyd resin paint (supplier - THE INTEC CO., LTD., Japan) and brown paint of the trademark "KLCF IMPROVEMENT 3 BROWN" from nitrification cotton attached to it, resulting in a transfer film having a laminated protective layer for the top and a paint pattern for decoration (which corresponds to the printed pattern). The transfer under water pressure is carried out in the order of the stages shown in Figs. 7, A-7, G, using a transfer film, and in order to apply a paint pattern to decorate the transfer film with restoration of paint adhesion, a resin-cured composite is used. solvent-free ultraviolet radiation, which is a UV-curable type ink, commercially available under the trade name "UV PAL-000 MEDIUM" (UV-type screen ink from TEIKOKU INK MANUFACTURE CO., LTD., Japan). The specified composite based on a resin, curable by ultraviolet radiation, solvent-free type is applied to the ink pattern (printed pattern) of the transfer film by coating method with removing excess wire rod even before the transfer film is introduced into the transfer bath. A transfer film having a resin composite thus cured, UV curable, solvent free type floats on the surface of the transfer bath water. After the paint pattern has adhesion, restored by the specified resin-based composite, curable by ultraviolet radiation, as shown in Fig.7, D, the product is immersed in water through a transfer film. After the paint drawing and the protective layer for the top are transferred in this way, the product is removed from the water, the product is irradiated with ultraviolet radiation, washed with water and dried, resulting in a transfer product (product) under water pressure 10 ′, as shown in FIG. .8.

Option 4

Water pressure transfer is carried out in the same manner as in embodiment 3, except that a mixture of acrylic varnish under the brand name "PLA-AGE" (manufacturer - THE MUSASHI TORYO CO., LTD., Is used as a protective layer for the topcoat). Japan) and ethyl acetate in a ratio of 1: 1.

Option 5

The transfer under water pressure is carried out in the same manner as in options 3 and 4, except that after applying as a protective layer for the top of the transfer film, UV-curable type paint under the brand name "UV PAL-000 MEDIUM" (manufacturer and supplier - TEIKOKU INK MANUFACTURE CO., LTD., Japan), which is the same as that applied to restore the adhesion (activation) of the film transferred under water pressure, cure with very little ultraviolet radiation 1% or less of the number radiation required for the usual curing of the composite, and stop immediately to dry when touched with your finger, printing software using a large-scale inkjet printer MC-10000 series MAXART (manufacturer - THE SEIKO EPSON CO., LTD., Japan) get a printed drawing, and six colors of the oily paint of the pigment system are printed on the protective layer, after which they are dried in an atmosphere with a normal temperature for 30 minutes, resulting in a transfer film having a top layer and a paint pattern (corresponding to print drawing).

In any of the options 3-5, since two layers of the paint pattern and the protective layer for the top dissolve, although a slightly longer time is required to restore the adhesion of the paint pattern than in the case of transferring a transfer film having only the paint pattern provided on it, transfer under water pressure in accordance with any of the options is carried out successfully, except for the disappearance of the folds of the figure, overexposed on the periphery of the part, especially having a deep color. In addition, the product under pressure transfer of water (G) obtained in these variants has a top layer applied on top of the decorative layer simultaneously with the transfer, and it is confirmed that the product under pressure under water pressure according to option 3 has a slightly lower degree of gloss compared to products transfer under water pressure according to options 4 and 5, but has a perception to the touch of gloss gloss is much better than a transfer product under water pressure (E) (see option 3), which does not have a top layer obtained by transferring a printed pattern into first penetrates resin composite, the curing ultraviolet ray containing type solvent in the reduction of adhesion of the print pattern the resin composite, and has a depth appearance of the decorative layer imparted.

When the adhesion of the decorative layer and the upper layer of the transfer product under the pressure of water obtained in each of the options is determined by the lattice notch of the tape (10 mm, 100 measurements), it is confirmed that the product in accordance with any of the options has the same adhesion as a traditional product transfer under water pressure (B) without any top layer, having a printed pattern transferred when the printed pattern was activated by a traditional activating agent, a traditional product under pressure transfer of water (C), having a traditional ionic acrylic resin deposited on the decorative layer, and the product transfer under pressure of water according to option 2 or 3.

When, as a solvent resistance test, a reciprocating wipe of the product surface with ten times folded mesh material containing xylene was performed eight times, it was confirmed that the product of any of the options showed good solvent resistance equivalent to the solvent resistance of a traditional transfer product under the pressure of water (F) having an upper layer of a UV curable type coating material.

In options 3-5, the transfer under water pressure is carried out using a transfer film having a laminated protective layer for the top and a paint pattern for decoration (printed pattern), and after the paint pattern has been activated by applying a UV curable resin composite, but since any of the options has the purpose of fixing the restoration of adhesion of the paint pattern (printed picture) and the protective layer for the top, the characteristic of the winding of the paint pattern and the protective layer for the top around the body (from ii), on which the pattern is transferred under water pressure, and the ability to cure the composite with the UV curable resin of the paint pattern and the top layer on the body onto which the pattern is transferred under water pressure, irradiation with ultraviolet radiation, when they are completely combined with each other, there remains a place for improvement the degree of surface gloss and smoothness of the surface, and therefore it should be understood that more excellent surface gloss, mechanical strength, and resistance to mortar can be imparted. erator, etc. Whereas the coating material, paint and composites ultraviolet ray curable resin used as a topsheet, their types and their composition ingredients.

Figure 9 shows a method of transferring water under pressure in accordance with a third form of an embodiment of the invention. This method of transferring under water pressure is a method in which a transfer film of a surface protective layer 316 having a surface protective layer 340 for protecting the surface of an article deposited on a water-soluble film 314 is supplied and floated on water 318 in a transfer bath (not shown) so that the surface protective layer 340 is directed upward, and the product 10 for transferring water under pressure of the surface protective layer 340 is immersed in water 318 through the transfer film 316, resulting in the transfer under pressure of water. Water-soluble film 312 may be the same as used with the first and second forms of option.

The surface protective layer 340 may be an appropriate composite, such as a dry cure coating material, a transparent paint that has wear and drug resistance. The surface protective layer 340 may be applied to the entire surface of the water-soluble film 314 with a suitable application device, such as a deep photo printing device. The surface protective layer 340 may be formed by a UV curable resin composite.

In the method of transferring water under pressure according to the third form of the embodiment, the surface protective layer (transfer layer) 340 applied to the water-soluble film 314 is in a dry state (see Fig. 9, A).

When water pressure transfer is carried out, a UV-curable resin composite 320A is applied to the dry surface protective layer 340 of the transfer film 316 (see FIG. 9, B). In a state where the adhesion of the surface protective layer 340 is restored by the UV curable resin composite 320A, the transfer film 316 floats on water 18 in the transfer bath (see FIG. 9, C) with the surface protective layer 340 pointing upward. Then, the article (undecorated article) 10, which does not have a printed pattern, is immersed in water together with the transfer film 316, so that the surface protective layer 340 containing the UV cured resin composite 320A adheres to the transfer surface 10S of the article 10 as a result a surface protective layer 340 comprising a UV curable resin composite 320A, and then ultraviolet radiation 322 irradiates an article 10 having surface protection transferred thereto a UV-curable resin-containing composite layer, thereby curing a UV-curable resin composite, 320A and a surface protective layer 340 (see FIG. 9, E).

As described in relation to other forms of the embodiment, the article 10 is immersed in water when it can be transported by a conveyor similar to the inverse triangle, or supported by the arm of a robot. Similarly, the step of applying the UV curable resin composite 320A to the surface protective layer 340 (see FIG. 9, B) and the transfer film floating step on water 318 (see FIG. 9, C) can be performed in the reverse order, and the composite based on the resin, curable with ultraviolet light 320A can be sprayed onto the surface protective layer 340 and restored by adhesion of the surface protective layer 340.

A UV curable resin composite 320A applied to the surface protective layer 340 of the transfer film 316 to restore its adhesion serves to properly activate the dry surface protective layer 340 of the transfer film 316 to restore the adhesion of the surface protective layer 340 of the transfer film 316 and may be UV curable resin composite, solvent free type, which is the same as used in the first and second forms of Bretenoux. One example of a UV curable resin composition that is solvent free type is shown below.

(1) Oligomer (photopolymerizable prepolymer) 30-50 wt.% (2) Multifunctional Acrylate (photopolymerizable monomer) 10-30 wt.% (3) Single Function Acrylate (photopolymerizable monomer) 10-40 wt.% (4) Photopolymerization Initiator 0.5-5 wt.% (5) Non-reactive additives 1-20 wt.%

Since the mechanism by which the activating components of the specified resin-based composite cured by ultraviolet light 320A restore the adhesion of the surface protective layer 340 is the same as that of the composite based on the resin cured by ultraviolet radiation to restore adhesion in the first form and in the second form , a detailed description of the action of the respective composites is omitted. Thus, the UV curable resin composite 320A is immersed in the surface protective layer 340, therefore, the resin composite 320A and the surface protective layer 340 are completely combined with each other, but if Fig. 9 tries to show such a state, then it becomes impossible for both differ from each other, and it should be clear that they are conveniently shown in the state of the layers.

Then, as shown in FIG. 9, F, a water shower 324 is introduced to wash the article 310 with water, thereby removing the water-soluble film 314 of the transfer film 316 that covers the article 310. Then, as shown in FIG. 9G, the hot air stream 326 dries the surface an article onto which the surface protective layer 340 comprising the UV curable resin 320A is transferred, resulting in a product 310 having the transferred surface protective layer 340 (see FIG. 10).

Thus, when a surface protective layer 340 ′ is applied, the mechanical and chemical protection of the article 310 will be able to be enhanced. In particular, since the UV curable resin composite is immersed in the surface protective layer 340 to restore adhesion, therefore, the surface protective layer 340 and the UV curable resin composite are completely combined with each other, adhesion ability and solvent resistance the surface protective layer can be improved in the same manner as in the third form of the option. The surface protective layer 340 ′ never has a damaged surface and is of high quality to the touch of the gloss given to it, because the surface protective layer 340 ′ is applied to the product by pressure transfer of water.

Although in the method according to the third form of the embodiment, the article 10 has no applied decoration, the surface protective layer 340 can be applied to the article 10 ′ having a decorative layer 10 ′ (such as the article in FIG. 3 in accordance with embodiment 1), under water pressure or other suitable method. 11 shows a decorated article 310 with a surface thus protected.

As described with respect to the first to third forms, since the UV curable resin composite 320A to restore the adhesion of the surface protective layer 340 is a UV curable resin composite that does not contain a solvent such as unwanted volatility of the activating component is reduced and the adhesion recovery is improved therefore deterioration of the working atmosphere is prevented.

Option 6

In another specific example (option 6), in accordance with a third form of an embodiment of the invention, a mixture of acrylic varnishes under the brand name "PLA-AGE" (manufacturer - THE MUSASHI TORYO CO., LTD.) Is applied to or on a smooth, water-soluble film having the main ingredient of polyvinyl alcohol. ., Japan) and ethyl acetate in the ratio 1: 1 as the surface protective layer of the transfer film by intaglio printing using a printing cylinder having # 10 mesh 60 microns in size and after drying using a wind stream with a normal temperature in within a few seconds to obtain a surface protective layer of the transfer film. The transfer under pressure of water is carried out on the product, decorated with a transfer under pressure of water, but not having an applied upper layer, in the same way as the method shown in Fig.9, A-9, G. In this case, a UV-curable resin composite is used that is solvent-free, such as a UV-curable screen-printing ink of the type known under the trade name "UV PAL-000 MEDIUM" (manufacturer and supplier - THE TEIKOKU INK MANUFACTURE CO., LTD., Japan), to restore the adhesion of the surface protective layer when applied.

This UV curable paint is applied to the surface of the protective resin layer of the transfer film using a metal wire before placing the transfer film in the transfer bath. The transfer film with the paint thus applied floats on the water surface of the transfer bath. After the surface protective layer has restored adhesion with this paint, the product is immersed in water by pressing the transfer film. After the surface protective layer has been transferred to the surface of the product in this way, the product is removed from water, irradiated with ultraviolet radiation and washed with water and dried, resulting in an article (product) 310 ′ having a surface protective layer 340 ′ applied to the decorative layer 30 ′, as shown in FIG. 11.

In Embodiment 6, the surface protective layer 340 ′ can be appropriately transferred under water pressure, and the thus transferred surface protective layer 340 ′ has a uniform film thickness having less surface disturbance (unevenness) and good quality to the touch of gloss. It is confirmed that the transfer product under water pressure (H) obtained in Embodiment 6 has an intensity attached to it, so that a high-quality touch feeling is provided while ensuring a uniform film thickness with fewer disturbances, thereby giving a good gloss to the touch quality than articles of transfer under water pressure (G) having a surface protective layer for the top and a decorative printed pattern transferred under water pressure, in options 3-5. It has a glossy touch quality equivalent to the quality of a pressure transfer product (C) with a top layer formed by applying and drying acrylic resin on a decorative layer by the traditional spraying method.

When the adhesion of the surface protective layer of the transfer product under water pressure, obtained according to option 6, is determined by the method of lattice notch tape (10 mm, 100 measurements), it is confirmed that the adhesion on the surface of the product (the surface of the undecorated product or the decorative layer of the decorated product) in accordance with any of the options is equivalent to the adhesion of the transfer product under water pressure according to options 1 and 2.

When, as a test for resistance to solvents, a reciprocating wipe of the surface of the product (water pressure transfer product) with ten times folded mesh material containing xylene was carried out eight times, it was confirmed that the product of option 6 has good solvent resistance equivalent to resistance to solvents of products according to other options.

We can say that option 6 is an example of the repetition of similar stages in which a smooth printing layer obtained by applying a transparent ink or transparent coating material to the decorative layer 30 of the product 10 ′ obtained by transferring under water pressure of option 2 is transferred under water pressure.

Industrial applicability

According to the water pressure transfer method of the present invention, since the UV-curable resin-based composite is applied to a printed pattern and / or surface protective layer of the transfer film to be transferred to the product to restore ink adhesion of the printed pattern, and the resin-based curable composite it impregnates the printed pattern with ultraviolet radiation, the surface protection function is given to the decorative layer formed when the printed pattern was transferred after curing UV radiation, and therefore industrial applicability can be markedly improved.

Claims (8)

1. A method of transferring water under pressure, including the stage of wetting the transfer layer of the transfer film having the transfer layer in a dry state on a water-soluble film and then immersing the product together with the transfer film under water so that the surface of the product overlays the transfer a layer, wherein said transfer layer is transferred under the influence of water pressure to a specified surface of said product, characterized in that said transfer layer is applied in the form of a coating A composite based on a solvent-free resin, curable by ultraviolet radiation or electron radiation, including a photopolymerizable monomer (curable resin-based composite), a photopolymerizable prepolymer, and a photoinitiator to wet the transfer layer, and then the transfer layer is transferred, the specified product is irradiated with ultraviolet radiation or electron radiation to cure said resin curable composite, whereby on said surface On the specified product, a transfer layer is formed. 2. The method of transferring under water pressure according to claim 1, wherein said transfer layer is a printed pattern, where a decorative layer is formed on the surface of said product. 3. The method of transferring water under pressure according to claim 1, wherein said transfer layer is a combination of a printed pattern and a surface protective layer underneath said printed pattern, wherein a decorative layer having a surface protective layer is formed on the surface of said product. 4. The method of transferring water under pressure according to claim 1, wherein said transfer layer is a surface protective layer, wherein a surface protective layer is formed on the surface of said product. 5. The product obtained by transfer under pressure of water, characterized in that it has a surface formed by the method of transfer under pressure of water according to any one of claims 1 to 4.
Priority on points: 12/09/2003 according to claims 1, 2 and 5; 02/10/2004 according to claim 3; 06/02/2004 according to claim 4.

Images