JPH01145187A - Metallic foil transfer method and transfer sheet for use in said method - Google Patents

Abstract

PURPOSE:To enable easy transfer by transferring a metallic foil at a part corresponding to an image by pressure-sensitive adhesion, from a film base treated to be releasable of a metallic foil sheet for transfer. CONSTITUTION:One side of a base film 1 made of a synthetic resin, with a resin layer 2 soluble in oily solvents thereon, is treated with a silicone 3 to be releasable, thereby obtaining a transfer sheet. A pressure sensitive adhesive 5, an ink 6 and a photosensitive agent 7 are applied to the side in that order in the form of layers. A negative film 8 is placed thereon, the photosensitive agent 7 is hardened at a part corresponding to an image, and the negative film 8 is removed. The photosensitive agent 7 at unexposed parts and the layers therebeneath are sequentially removed to obtain, for example, a transfer image B. A pressure sensitive adhesive 9 is applied to the entire surface in a layer form. The transfer sheet is pressed against and adhered to an object 10, and the transfer sheet is separated at the pressure sensitive adhesive layer 5, and an image B is transferred by pressure-sensitive adhesion. A metallic foil sheet for transfer is pressed against the pressure sensitive adhesive 5 on the surface of the transferred image B, and is stripped. A metallic foil 13 at the part corresponding to the image B is transferred, by pressure-sensitive adhesion, from a film base 12 treated to be releasable of the metallic foil sheet.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is applicable to the transfer of metal foil to be transferred as a desired pattern or image having metallic luster, for example, for commercial designers.
The present invention relates to a method for transferring metal foil that exhibits a gold or silver color when producing dummies such as labels, packages, signs, etc., and for presentations, and a transfer sheet used in the method.

[Conventional technology]

Conventionally, as a technique for transferring a desired pattern or image having metallic luster, there was initially a technique widely known as hot stamping using a thermoplastic adhesive.

This technology requires a stamping board with the planned figure or pattern for transfer, so even if only one dummy (sample) is needed to determine the design, the expensive stamping board cannot be manufactured. In addition, there was a problem in that a device was required to heat the pressing plate and press it against the object to be transferred during transfer.

Therefore, the present inventor has already proposed a completely new transfer method that does not use a heating means or a press plate in the first patent application filed in 1983.
No. 0281, secondly Japanese Patent Application No. 58-57029, and Japanese Patent Application No. 58-204588 propose a new transfer technology.

In view of the relationship with the present invention, in order to simplify the explanation, the second invention, which is an improved proposal, will be briefly explained.A transfer sheet is produced by vapor-depositing aluminum on a base film for transfer via a release layer. , coat it with adhesive, then coat it with a water-based photosensitizer, expose it to negative film using an ultraviolet lamp, remove the uncured parts with water and an oil-based solvent, and expose. Transferred images (figures) by etching the metal foil (evaporated aluminum)
At the same time, the cured photosensitive agent portion is removed and transferred. The metal foil sheet referred to here refers to a base film that is subjected to a release treatment (silicon, etc.), coated with a transparent pigment (choose a color that produces the desired metallic luster, such as gold or silver), and then It has aluminum vapor-deposited on it and is currently widely used.

In the third invention, the complexity of the process in the second invention is simplified and adapted to mass production.
Adopting a printing method.

This method eliminates the need for steps such as exposure to light, washing with water, and washing with oil-based solvents.

[Problem that the invention seeks to solve]

However, in both the second and third inventions, in order to obtain an image (transferred pattern), there is a large step in which the aluminum foil deposited on the base film must be etched, and furthermore, this etching process is Regardless of whether the method uses water-based or oil-based ink (water-based photosensitizer or oil-based photosensitizer), a separate etching solution is required.

Although the process for obtaining a transferred image has been simplified, it is still complicated.

These problems arise because, in both methods, a transfer image is formed on an aluminum foil deposited on a base film and then transferred.

[Means for solving problems]

The present inventor has solved the above-mentioned problems of the prior art based on a completely new technical idea that abandons the method of forming a transfer image on aluminum foil and then transferring the image.

The solution based on this new technical idea is divided into three method inventions depending on the structure of the transfer sheet used, and the transfer sheet used in one of these methods exhibits special effects. It is something to do.

(First invention) The first invention of the present invention is a metal foil transfer method comprising the following steps (a) to (f). That is, (A) a layer of adhesive is coated on the side surface of a transfer sheet in which at least one side of a synthetic resin base film has been subjected to a release treatment with silicone through a resin layer that is dissolved in an oil-based solvent; Either of the following methods: (B) coating the adhesive in a layer, coating the ink in a layer, and then coating the photosensitive agent in a layer on top of the adhesive. (b) After the step (b), place a negative film and expose to light to harden the photosensitive agent in the image area, and remove the negative film; (c) After the step (b), apply the above Method of process (a) (
If A) is selected, the photosensitive agent in the non-photosensitive area and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent, and if method (B) of the above step (A) is selected. (d) removing the photosensitive agent in the non-photosensitive area, the ink layer below it, and the adhesive layer below it by washing with water and an oil-based solvent or an oil-based solvent; (d) obtaining a transferred image;
After the step (c), the entire surface is coated with a layer of adhesive for image transfer, and (e) after the step (d), the transfer sheet is applied to the object. Adhere to the object using the adhesive in step (d), peel off this transfer sheet from the adhesive layer in step (a), and transfer the obtained image to the object using pressure-sensitive adhesive. (f) Press a metal foil sheet for transfer onto the adhesive of step (a) that has appeared on the surface of the transferred image, peel off the metal foil sheet for transfer, and remove the metal foil sheet for transfer. The metal foil of the image-corresponding portion is transferred from the release-treated film substrate by pressure-sensitive adhesive.

(Second invention) The second invention of the present invention is a metal foil transfer method comprising the following steps (a) to (e). That is, (A) a layer of a first adhesive soluble in an oil-based solvent is coated on one side of a transfer sheet made of at least one base film made of a synthetic resin and subjected to mold release treatment with silicone; A layer of oil-based ink is coated on the adhesive layer of or (B) coating an ink composition in which water-based ink, water-based adhesive, and water-based photosensitizer are kneaded; ), a negative film is placed on the top layer and exposed to light to cure the photosensitive agent in the image area, and the negative film is removed; (c) after the step (b), the method of the above step (a)
When A) is selected, the non-photosensitive portion of the photosensitive agent is removed by washing with water, and then the second adhesive layer, the ink layer and the first adhesive layer below the non-photosensitive portion of the photosensitive agent are removed using an oil-based solvent. removing the layer, then removing the photosensitive portion of the photosensitive agent with an aqueous solvent, and when the method (B) is selected, removing the non-photosensitive portion of the ink composition by washing with water, thereby obtaining a transferred image. (d) After step (c), apply the transfer sheet to the object, and when method (A) of step (a) is selected, apply the transfer sheet to the object with the second adhesive. When the method (B) is selected, the ink composition is adhered to the object using the water-based adhesive appearing in the non-photosensitive area, and the transfer sheet is peeled off at its silicone release layer. (e) When method (A) of the above step (a) is selected, the first adhesive appearing on the surface of the transferred image is transferred to the object by pressure-sensitive adhesive. When method (B) is selected, a metal foil sheet for transfer is pressed against the water-based adhesive in the non-photosensitive area of the ink composition, and the metal foil sheet for transfer is peeled off, and the metal foil sheet for transfer is released from the mold. The metal foil of the image-corresponding portion is transferred from the treated film substrate by pressure-sensitive adhesive.

(Third invention) The third invention of the present invention is a metal foil transfer method comprising the following steps (a) to (g). That is, (a) one side of a transfer sheet made of a base film made of synthetic resin is coated with a layer of (A) a viscous oil-based ink or an ink composition in which silicone is mixed into the oil-based ink; (B) Coating a layer of metal foil transfer adhesive,
(b) coating the ink or ink composition layer with a non-viscous oil-based ink or an ink composition in which silicone is mixed with the oil-based ink; Coating an oil-based photosensitizer in a layer, (c) after the step (b), a negative film is placed and exposed to harden the photosensitizer in the image area, and the negative film is removed; (d) the step (d) After c), the non-photosensitive portion of the photosensitizer, the ink or ink composition layer below it, and the metal foil further below when method (B) of step (a) is selected, are treated with an oil-based solvent. (e) After the step (d) of removing the transfer adhesive to obtain a transferred image,
The transfer sheet.

Coat the entire surface with a layer of oil-based adhesive, (to)
After the step (e), the transfer sheet is applied to the object, the transfer sheet is pressed against the object, the transfer sheet is peeled off, and the resulting image is applied to the object using the oil-based adhesive. (g) When method (A) of step (a) is selected, the viscous ink or ink composition appearing on the surface of the transferred image is coated with the method (g). When B) is selected, the metal foil sheet for transfer is pressed against the adhesive for metal foil transfer, the metal foil sheet for transfer is peeled off, and the metal foil sheet for transfer is peeled off from the film substrate that has been subjected to the release treatment of the metal foil sheet for transfer. The metal foil on the corresponding image area is transferred using pressure-sensitive adhesive.

(Fourth invention) The transfer sheet according to the fourth invention of the present invention includes (a) a transfer sheet in which at least one side of a base film made of synthetic resin is subjected to mold release treatment with silicone through a resin layer dissolved in an oil-based solvent; (A) Coating a layer of adhesive on the side of the
Either (B) coating the adhesive in a layer, coating the ink in a layer on top of that, and then coating the photosensitive agent in a layer on top of that. (b) After the step (a), a negative film is placed and exposed to harden the photosensitive agent in the image area, and the negative film is removed; (c) After the step (b), The method of step (a) above (
If A) is selected, the photosensitive agent in the non-photosensitive area and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent, and if method (B) of the above step (A) is selected. The photosensitive agent in the non-photosensitive area, the ink layer below it, and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent to obtain a transferred image.
d) After the step (c), coat the entire surface with a layer of adhesive for image transfer, and (e) after the step (d), apply the transfer sheet to the object to transfer the image. The sheet is adhered to the object using the adhesive in step (d), this transfer sheet is peeled off from the adhesive layer in step (a), and the resulting image is pressure-sensitive adhesive bonded to the object. (f) Press a metal foil sheet for transfer onto the adhesive of step (a) that appears on the surface of the transferred image, peel off the metal foil sheet for transfer, and remove the metal foil for transfer. The above step (a) involves transferring the metal foil of the image-corresponding portion from the film substrate that has been subjected to the release treatment of the foil sheet using pressure-sensitive adhesive.
A transfer sheet used in a metal foil transfer method consisting of ~(), wherein the base film made of synthetic resin is made of polyester, polypropylene, or styrene-based synthetic resin, and at least one side thereof is made of teeth,
Coated with a layer of synthetic resin that dissolves in oil-based solvents,
It is characterized in that silicone as a mold release agent is provided in the form of a thin film on the synthetic resin layer so that the synthetic resin layer is partially exposed in a small area.

[Effect]

(First invention) In the first invention, an adhesive layer and a photosensitive agent layer (and an ink layer when method (B) of step (a) is selected) are formed on the transfer sheet to form an image using a negative film. This is then transferred to the object using an adhesive for transfer in step (d). This is where images other than metal foil are transferred. In other words, this method does not involve etching aluminum vapor-deposited foil to create a transfer image of the metal foil, which is then transferred to the object, as in the conventional method. Then, by peeling off the transfer sheet,
A conventional metal foil sheet is applied to the adhesive of the image that appears on the surface, and the foil corresponding to the image is adhered using pressure sensitivity. After the metal foil sheet is released from the silicone, it is peeled off. It is possible to transfer the foil in the area corresponding to the image.

In the method of the present invention, the silicone mold release layer is provided on the transfer sheet via the oil-based solvent-soluble resin layer, so that when the non-photosensitizer portion is removed, the oil-based solvent-soluble resin layer Even if the silicone layer is removed together with the adhesive and the entire surface is coated with an adhesive for transferring the image to the object, the adhesive will be applied to the transfer sheet in the non-photosensitive areas, that is, in areas other than the transferred image. By adhering the photosensitizer area (image) to the target object, the border line between the photosensitizer area (image) and the non-photosensitizer area, that is, the area other than the transferred image, This has the effect that the adhesive in areas other than the image on the object is not transferred to the object, and as a result, when the metal foil is transferred, the image area is clearly transferred.

[Second invention] In this second invention, an adhesive layer, an ink layer, and a photosensitive agent layer are formed on a transfer sheet into an image using a negative film,
This is transferred onto the object due to the adhesiveness obtained in step (c).

This is where images other than metal foil are transferred. In other words, this method does not involve etching-singing aluminum vapor-deposited foil to create a transfer image of the metal foil, which is then transferred to the object, as in the conventional method.

Furthermore, according to the second invention, unlike the first invention, there is no adhesive coating step after exposure and after the image is formed. However, with this method, there is no need to consider adhesion of the adhesive to the object other than the image, and therefore it is possible to remove the surface of the metal foil with a water-based solvent. Even in some cases, it is possible to achieve an excellent image transfer similar to that of the first invention.

[Third invention] In the third invention, the transfer sheet is coated with an adhesive layer and then coated with oil-based ink, or coated with a viscous ink or an ink composition mixed with silicone, and then coated with a photosensitive agent. This is coated, formed into an image using a negative film, and coated with a transfer adhesive, so that the photocured image portion is transferred to the object. This is where images other than metal foil are transferred. In other words, this method does not involve etching-singing aluminum vapor-deposited foil to create a transfer image of the metal foil, which is then transferred to the object, as in the conventional method.

In this third invention, the base film of the transfer sheet is not subjected to mold release treatment, but in this case, the peeling between the ink and the base film or the peeling due to the mixing of silicone may be caused by the separation between the two. This weakens the adhesive strength.
Image transfer is possible because the adhesive force is smaller than the adhesive force between an oil-based adhesive and an ordinary transfer target such as paper, cloth, plastic, or wood. As a result, although the image freshness is slightly inferior to that of the first and second inventions, the object of the invention can be achieved.

(Fourth invention) This fourth invention is a transfer sheet used in the first invention, but the base film is coated with a synthetic resin that is soluble in an oil-based solvent in a layered manner, and the synthetic resin layer is coated with a separated layer on the synthetic resin layer. By providing silicon as a molding agent in the form of a thin film so that the synthetic resin layer is partially exposed in a minute area, it is possible to prevent the adhesive layer or ink from forming in the non-photosensitive area during image formation in step (c). When the adhesive layer is removed using an oil-based solvent, this oil-based solvent is also permeated through the minute area to remove the release silicone layer, which is necessary when transferring the image to the target object, on the lower layer that serves as its base. It can be removed by dissolving the synthetic resin layer.

As a result, when transferring an image to an object, when the adhesive for transfer is coated on the entire surface from the top with a stretching bar etc. (step (d)), the adhesive is applied to the non-image area. It can be directly and strongly adhered to the base film of the transfer sheet (because there is no release layer), and when the image is transferred, it is sharply cut between the transferred image area and the non-image area. As a result, it was possible to prevent the adhesive coated on the non-image areas from adhering to the object to be transferred, making it possible to achieve sharp foil transfer of only the image areas when transferring metal foil. .

These effects are achieved by combining the above-mentioned base film, oil-based resin layer, and silicone, and by using a new technical concept of special coating of silicone.
Since the structure is simple, this transfer sheet can be manufactured easily.

〔Example〕

Preferred embodiments of the metal foil transfer method and the transfer sheet used in the method according to the present invention are shown in FIGS. 1 to 7.
The first invention to the fourth invention will be explained in detail below.

(First invention) The metal foil transfer method according to the first invention includes the following steps (
It is carried out in (b) to (f). That is, as step (A), at least one example of the base film 1 made of synthetic resin is dissolved in an oil-based solvent and applied to the side surface of the transfer sheet 4 which has been subjected to a release treatment with silicone 3 via the resin layer 2, and as method (B), The adhesive 5 is coated in a layer, the ink 6 is coated thereon in a layer, and the photosensitive agent 7 is coated thereon in a layer (see FIG. 1). In this case, on one side of the base film 1, the dimethylpolycyclosane silicone 3 is formed into a fine mesh shape through 20 layers of polyamide resin soluble in an oily solvent.
The polyamide resin 2 is baked into a thin film so that a small area of the polyamide resin 2 is partially exposed.

Although the base film 1 is made of polyester, it may also be made of polypropylene or styrene-based synthetic resin.

Furthermore, as the adhesive 5, either a water-based glue or an oil-based adhesive can be used, but here, a vinyl-based adhesive is used as the oil-based adhesive. It is something to be glued.

Further, the ink 6 can be either water-based or oil-based, but oil-based ink is used here. This oil-based ink 6 functions as a cushioning material during transfer and also as a kind of extender for forming an image.

Further, as the photosensitizer 7, a commonly used water-based photosensitizer is used here, but an oil-based photosensitizer may also be used. If this oil-based photosensitive agent is used, and the adhesive 5 and ink 6 are also all oil-based, it is sufficient to use only the oil-based solvent to remove non-photosensitive areas for image formation, which will be described later.

In addition, in this step (A), instead of the above method (B), as method (A), the adhesive is coated in a layer,
A method may also be adopted in which a photosensitive agent is coated in a layer on top of the photosensitive material.

Next, in step (b), after step (a), a negative film 8 is placed and exposed to harden the photosensitive agent 7 in the image area, and the negative film 8 is removed (second step).
(see figure).

This exposure may be performed using a commonly used vacuum type ultraviolet lamp, but since this apparatus itself is not directly related to the present invention, detailed explanation thereof will be omitted.

Further, the negative film 8 has an image to be transferred such as desired characters and figures.
I chose "B".

Next, as a step (c), since the method (B) of the step (a) is performed after the step (b), the photosensitive agent 7 in the non-photosensitive area and the ink layer 6 below it , and the adhesive layer 5 below it are removed by washing with water and an oil-based solvent to obtain a transferred image B (FIG. 3).

The oil-based solvent in this case may be alcohol-based or equivalent.

In addition, if method (A) of the above step (a) is selected,
The photosensitive agent 7 in the non-photosensitive area and the adhesive layer below it are removed at once using only an oil-based solvent.

Next, in step (d), after step (c), the entire surface is coated with a layer of adhesive 9 for transferring image B (see FIG. 4).

The adhesive 9 in this case may be the same as the adhesive 5 described above.

Next, as a step (e), after the step (d), the transfer sheet 4 is applied to the object 10, here a package, and the transfer sheet 4 is applied to the object with the adhesive 9 of the step (d). The transfer sheet 4 is then peeled off from the adhesive layer 5 in step (a), and the resulting image B is transferred to the object 10 by pressure-sensitive adhesive (step 1). (See Figure 5).

This transfer may be performed using a roller pen or the like.

In step (b), a metal foil sheet for transfer 1 is applied to the adhesive 5 of step (a) that has appeared on the surface of the transferred image B.
1, the transfer metal foil sheet 11 is peeled off, and the metal foil 13 corresponding to the image B is transferred from the release-treated film substrate 12 of the transfer metal foil sheet 11 by pressure-sensitive adhesive. Yes (see Figure 6).

The metal foil sheet 11 for transfer used here is already widely used, and as mentioned briefly at the beginning, a release layer of silicon 14 is applied to the film substrate 12.
This is coated with a transparent pigment (choose a color to give a desired metallic luster, such as gold or silver), and then aluminum is vapor-deposited, and the film substrate 12 is peeled off by the release layer. Then, the colored metal foil 13 composed of this aluminum and the transparent pigment is transferred.

(Second invention) The metal foil transfer method according to the second invention includes the following steps (
It is implemented by (a) to (e). In the description of this embodiment, the drawings of the first embodiment will be omitted since they will be sufficient to aid understanding.

As step (A), at least one side of a synthetic resin base film is treated with silicone to release the transfer sheet, and as method (A), a layer of a first adhesive that is soluble in an oil-based solvent is coated. A layer of oil-based ink is coated on the first adhesive layer, a second adhesive that is soluble in an oil-based solvent is coated on the ink layer, and a layer of oil-based ink is coated on the first adhesive layer. coated with a layer of water-based photosensitizer.

However, instead of this method (A), as method (B), an ink composition mixed with an aqueous ink, an aqueous adhesive, and an aqueous photosensitizer may be coated. Hardened water-based photosensitizers can be removed with bleach.

As method (b), after the step (a), a negative film is placed on the top layer and exposed to light to harden the photosensitive agent in the image area, and the negative film is removed, and as step (c),
After the step (b), the non-photosensitive area of the photosensitive agent is removed by washing with water, and then the second adhesive layer, the ink layer and the first adhesive layer below the non-photosensitive area of the photosensitive agent are removed using an oil-based solvent. The adhesive layer is removed, and then the photosensitive portion of the photosensitive agent is removed using an aqueous solvent to obtain a transferred image.

However, when method (B) of step (a) is selected, the non-photosensitive portions of the ink composition may be removed by washing with water to obtain a transferred image.

As step (d), after the step (c), the transfer sheet is applied to the object and adhered to the object with the second adhesive, and the transfer sheet is peeled off at its silicone release layer. The resulting image is then transferred to the object using pressure-sensitive adhesives.

However, when the method (B) of the above step (A) is selected, the ink composition is adhered to the object using the water-based adhesive appearing in the non-photosensitive area, and the transfer sheet is attached to the object in its silicone release layer. All you have to do is peel it off and transfer the resulting image to the object using pressure-sensitive adhesive.

As step (E), a metal foil sheet for transfer is pressed against the first adhesive appearing on the surface of the transferred image, and the metal foil sheet for transfer is peeled off. The metal foil of the image-corresponding portion is transferred from the molded film substrate by pressure-sensitive adhesive.

However, when the method (B) of the above step (A) is selected, a metal foil sheet for transfer is pressed onto the water-based adhesive in the non-photosensitive part of the ink composition, and this metal foil sheet for transfer is peeled off. The metal foil in the image-corresponding portion may be transferred from the release-treated film substrate of the transfer metal foil sheet by pressure-sensitive adhesive.

The specific materials of each element used in the description of the embodiments above are substantially the same as the materials of the corresponding elements described in the first embodiment, so there is no need to repeat the detailed explanation here. I omitted it as such.

(Third invention) The metal foil transfer method according to the third invention includes the following steps (
It is implemented by (a) to (g). In the description of this embodiment, the drawings of the first embodiment will be omitted since they will be sufficient to aid understanding.

As step (A), as method (A), a layer of viscous oil-based ink or an ink composition obtained by mixing silicone in the oil-based ink is applied to one side of a transfer sheet made of a base film made of synthetic resin. It is coated.

However, instead of this method (A), as method (B), an adhesive for metal foil transfer is coated in a layer, and an oil-based ink without viscosity or an ink composition in which silicone is mixed in the oil-based ink is used. The agent may be coated in layers.

In step (b), an oil-based photosensitizer is coated in a layer on the ink or ink composition layer.

In step (c), after step (b), a negative film is placed and exposed to harden the photosensitive agent in the image area, and the negative film is removed.

In step (d), after step (c), the non-photosensitive portion of the photosensitive agent and the underlying ink or ink composition layer are removed using an oil-based solvent to obtain a transferred image.

However, when method (B) of step (a) is selected and implemented, the metal foil transfer adhesive layer further below the ink or ink composition layer is removed to obtain a transferred image.

In step (e), after step (d), the entire surface of the transfer sheet is coated with a layer of oil-based adhesive.

As step (f), after step (e), the transfer sheet is applied to the object, the transfer sheet is pressed against the object, and the transfer sheet is peeled off, and the resulting image is transferred to the object. It is transferred to the object using pressure-sensitive adhesive using an oil-based adhesive.

As step (g), a transfer metal foil sheet is pressed against the viscous ink or ink composition appearing on the surface of the transferred image, and the transfer metal foil sheet is peeled off. The metal foil of the image-corresponding portion is transferred from the release-treated film substrate of the sheet by pressure-sensitive adhesive.

However, when the method (B) of the above step (A) is selected, the metal foil sheet for transfer is pressed against the adhesive for metal foil transfer, and the metal foil sheet for transfer is peeled off. The metal foil of the image-corresponding portion is transferred from the release-treated film substrate of the sheet by pressure-sensitive adhesive.

The specific materials of each element used in the description of the embodiments above are substantially the same as the materials of the corresponding elements described in the first embodiment, so there is no need to repeat the detailed explanation here. I omitted it as such.

(Fourth invention) The transfer sheet according to the fourth invention uses the metal foil transfer method according to the first invention, that is, (a) dissolving at least one side of a synthetic resin base film in an oil-based solvent via a resin layer. Either (A) coat the side of the transfer sheet that has been released with silicone and coat it with a layer of adhesive, and then coat it with a layer of photosensitizer, or (B) coat the side of the transfer sheet with a layer of adhesive and then coat it with a layer of photosensitizer. (b) After the step (b), a negative film is placed and exposed to expose the photosensitive material to the photosensitive material. is cured in the image area, the negative film is removed, and (c) after the above step (b), the method of the above step (a) (
If A) is selected, the photosensitive agent in the non-photosensitive area and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent, and if method (B) of the above step (A) is selected. The photosensitive agent in the non-photosensitive area, the ink layer below it, and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent to obtain a transferred image.
d) After the step (c), coat the entire surface with a layer of adhesive for image transfer, and (e) after the step (d), apply the transfer sheet to the object to transfer the image. The sheet is adhered to the object using the adhesive in step (d), this transfer sheet is peeled off from the adhesive layer in step (a), and the resulting image is pressure-sensitive adhesive bonded to the object. (f) Press a metal foil sheet for transfer onto the adhesive of step (a) that appears on the surface of the transferred image, peel off the metal foil sheet for transfer, and remove the metal foil for transfer. The above step (a) involves transferring the metal foil of the image-corresponding portion from the film substrate that has been subjected to the release treatment of the foil sheet using pressure-sensitive adhesive.
It is used in the method of transferring metal foil consisting of ~ ().

The transfer sheet is made of a synthetic resin base film made of polyester, polypropylene, or styrene-based synthetic resin, and at least one side of the base film is coated with a layer of synthetic resin that is soluble in an oil-based solvent. On the synthetic resin layer, silicone as a mold release agent is provided in the form of a thin film so that the synthetic resin layer is partially exposed in a small area (see FIG. 7).

In this case, the silicone used as the mold release agent is dimethylpolycyclosane silicone 3, which is formed into a fine mesh shape through a layer of polyamide resin 2 which is soluble in an oily solvent. It is printed in a thin film so that a small area is partially exposed.

This silicone 3 coating may be applied by other conventional means than baking.

Further, the baking may be performed in a pattern other than a mesh shape, such as a grid shape, a door shape, or a dot shape (like a pinhole), in short, a structure in which the polyamide resin 2 is partially exposed in a small area. It is sufficient if it becomes.

〔Effect of the invention〕

(First invention) In the first invention, it is possible to simply and easily transfer from an existing metal foil transfer sheet without using the conventional process of etching aluminum vapor-deposited foil and the etching solution. It has an effect.

The method of this invention has the effect that when the metal foil is transferred, the image portion is clearly transferred.

(Second invention) In this second invention, it is possible to simply and easily transfer from an existing metal foil transfer sheet without using the conventional process of etching aluminum vapor-deposited foil and the etching solution. In addition to being effective, there is no need to consider the adhesion of the adhesive to the target object in areas other than the image, so it is possible to achieve an excellent image transfer of the metal foil similar to the first invention.

(Third invention) In this third invention, it is possible to simply and easily transfer from an existing metal foil transfer sheet without using the conventional process of etching aluminum vapor-deposited foil and the etching solution. Although the transfer accuracy is slightly inferior to the above-mentioned first and second inventions, the cost is very low because the base film of the transfer sheet can be used even though it has not been subjected to release treatment. It has the advantage that it can be implemented as

(Fourth invention) This fourth invention is a transfer sheet used in the first invention, but has a special coating structure of a base film, a synthetic resin soluble in an oil-based solvent, and silicone, that is, the synthetic resin layer has minute particles. Despite the simple structure of providing a thin film so that the area is partially exposed, this can prevent the adhesive coated on the non-image area from adhering to the transfer target, Therefore, when transferring the metal foil, it is possible to transfer the foil sharply only to the image portion.

[Brief explanation of the drawing]

The drawings show examples of the metal foil transfer method and the transfer sheet used in the method according to the present invention, FIG. 1 is a longitudinal cross-sectional side view of step (a) of the first invention, and FIG. 2 is a step The vertical side view of step (b), Figure 3, is the vertical side view of step (c), Figure 4.
The figure is a perspective view of step (d), FIG. 5 is a vertical side view of step (e), FIG. 6 is a perspective view of step (f), and FIG.
FIG. 2 is an enlarged perspective view of a transfer sheet.

Claims (10)

[Claims] (1) A metal foil transfer method consisting of the following steps (a) to (f). (B) At least one side of a base film made of synthetic resin is coated with a layer of adhesive on the side surface of a transfer sheet that has been released with silicone through a resin layer that is dissolved in an oil-based solvent; Apply either of the following methods: (B) Coating the adhesive in a layer, coating the ink in a layer on top of that, and then coating the photosensitive agent in a layer on top of that. (b) After the step (b), place a negative film and expose to light to harden the photosensitive agent in the image area, and remove the negative film; (c) After the step (b), carry out the step ( b) method (
If A) is selected, the photosensitive agent in the non-photosensitive area and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent, and if method (B) of the above step (A) is selected. (d) the step (c) is to remove the photosensitive agent in the non-photosensitive area, the ink layer below it, and the adhesive layer below it by washing with water and an oil-based solvent or an oil-based solvent; (d) the step (c) After that, the entire surface is coated with a layer of adhesive for image transfer, (e) After the step (d), the transfer sheet is applied to the object, and the transfer sheet is applied to the object in the step (d). (F) Adhere to the object with an adhesive, peel this transfer sheet from the adhesive layer of step (A), and transfer the obtained image to the object using pressure-sensitive adhesive. A metal foil sheet for transfer is pressed against the adhesive of step (a) that appears on the surface of the transferred image, and the metal foil sheet for transfer is peeled off, and the metal foil sheet for transfer is subjected to a release treatment. The metal foil of the image-corresponding portion is transferred from the film substrate by pressure-sensitive adhesive. (2) The adhesive in step (a) is water-based or oil-based, the photosensitive agent is water-based, and the ink or ink composition is oil-based.
The metal foil transfer method described in section. (3) The metal foil transfer method according to claim (1) or (2), wherein the base film in step (a) is polyester, polypropylene, or styrene resin. (4) The adhesive in the step (a) and the step (d) is a vinyl resin adhesive according to any one of claims (1) to (3). Metal foil transfer method. (5) A metal foil transfer method comprising the following steps (a) to (e). (A) A first adhesive soluble in an oil-based solvent is coated in a layer on one side of a transfer sheet in which at least one side of a base film made of synthetic resin has been subjected to a release treatment with silicone. A layer of oil-based ink is coated on the adhesive layer, a second adhesive that is soluble in an oil-based solvent is coated on the ink layer, and a water-based photosensitizer is coated on the second adhesive layer. Apply one of the following methods: (B) coating with an ink composition mixed with water-based ink, water-based adhesive, and water-based photosensitizer, and (b) the step (a). After that, a negative film is placed on the top layer and exposed to light to harden the photosensitive agent in the image area, and the negative film is removed. (c) After the above step (b), the method of the above step (a) (
When A) is selected, the non-photosensitive portion of the photosensitive agent is removed by washing with water, and then the second adhesive layer, the ink layer and the first adhesive layer below the non-photosensitive portion of the photosensitive agent are removed using an oil-based solvent. removing the layer, then removing the photosensitive portion of the photosensitive agent with an aqueous solvent, and when the method (B) is selected, removing the non-photosensitive portion of the ink composition by washing with water, thereby obtaining a transferred image. (d) After step (c), apply the transfer sheet to the object, and when method (A) of step (a) is selected, apply the transfer sheet to the object with the second adhesive. When the method (B) is selected, the ink composition is adhered to the object using the aqueous adhesive appearing in the non-photosensitive area, and the transfer sheet is peeled off at its silicone release layer. (e) When method (A) of the above step (a) is selected, the first adhesive appearing on the surface of the transferred image is transferred to the object by pressure-sensitive adhesive. When method (B) is selected, a metal foil sheet for transfer is pressed against the water-based adhesive in the non-photosensitive area of the ink composition, and the metal foil sheet for transfer is peeled off, and the metal foil sheet for transfer is released from the mold. The metal foil of the image-corresponding portion is transferred from the treated film substrate by pressure-sensitive adhesive. (6) A metal foil transfer method comprising the following steps (a) to (g). (B) One side of the transfer sheet made of a synthetic resin base film is coated with a layer of (A) a viscous oil-based ink or an ink composition prepared by mixing silicone into the oil-based ink, or (B) ) Coated with a layer of adhesive for metal foil transfer,
(b) coating the ink or ink composition layer with a non-viscous oil-based ink or an ink composition in which silicone is mixed with the oil-based ink; Coating an oil-based photosensitizer in a layer, (c) after the step (b), a negative film is placed and exposed to harden the photosensitizer in the image area, and the negative film is removed; (d) the step (d) After c), the non-photosensitive portion of the photosensitizer, the ink or ink composition layer below it, and the metal foil further below when method (B) of step (a) is selected, are treated with an oil-based solvent. removing the transfer adhesive to obtain a transferred image; (e) coating the entire surface of the transfer sheet with a layer of oil-based adhesive after step (d); (f) step (e). Afterwards, the transfer sheet is applied to the object, the transfer sheet is pressed against the object, and the image obtained by peeling off the transfer sheet is pressure-sensitively adhered to the object using the oil-based adhesive. (G) When method (A) of step (A) is selected, the viscous ink or ink composition appearing on the surface of the transferred image is transferred, when method (B) is selected. A metal foil sheet for transfer is pressed onto the adhesive for metal foil transfer, and the metal foil sheet for transfer is peeled off, and the metal foil of the image-corresponding portion is removed from the release-treated film substrate of the metal foil sheet for transfer. Transfer with pressure-sensitive adhesive. (7) (A) Coating a layer of adhesive on the side surface of a transfer sheet in which at least one side of a base film made of synthetic resin has been subjected to a release treatment with silicone through a resin layer that is dissolved in an oil-based solvent; (B) Coating the adhesive in a layer, coating the ink in a layer on top of that, and then coating the photosensitive agent in a layer on top of that. (b) After the step (a), a negative film is placed and exposed to harden the photosensitive agent in the image area, and the negative film is removed; (c) After the step (b), The method of step (a) above (
If A) is selected, the photosensitive agent in the non-photosensitive area and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent, and if method (B) of the above step (A) is selected. The photosensitive agent in the non-photosensitive area, the ink layer below it, and the adhesive layer below it are removed by washing with water and an oil-based solvent or an oil-based solvent to obtain a transferred image.
d) After the step (c), coat the entire surface with a layer of adhesive for image transfer; (e) After the step (d), apply the transfer sheet to the object, and apply the transfer sheet to the object. The sheet is adhered to the object using the adhesive in step (d), this transfer sheet is peeled off from the adhesive layer in step (a), and the resulting image is pressure-sensitive adhesive bonded to the object. (f) Press a metal foil sheet for transfer onto the adhesive of step (a) that appears on the surface of the transferred image, peel off the metal foil sheet for transfer, and remove the metal foil for transfer. The above step (a) involves transferring the metal foil of the image-corresponding portion from the film substrate that has been subjected to the release treatment of the foil sheet using pressure-sensitive adhesive.
A transfer sheet used in the metal foil transfer method consisting of ~(f), wherein the base film made of synthetic resin is composed of polyester, polypropylene, or styrene-based synthetic resin, and at least one side thereof is teeth,
Coated with a layer of synthetic resin that dissolves in oil-based solvents,
A transfer sheet in which a thin film of silicone as a mold release agent is provided on the synthetic resin layer so that the synthetic resin layer is partially exposed in a small area. (8) The transfer sheet according to claim (7), wherein the silicone is baked into a substantially mesh shape. (9) The transfer sheet according to claim (7) or (8), wherein the silicone is dimethylpolycyclosane-based. (10) The transfer sheet according to any one of claims (8) to (10), wherein the synthetic resin soluble in the oily solvent is polyamide-based.