JPH068697A - Method for transcription - Google Patents

Abstract

PURPOSE:To transcribe all parts of a pattern at precise positions in the transcription to a three-dimensionally curved surface by the use of a transcription sheet which is prepared by forming the pattern on a soluble base sheet. CONSTITUTION:A pattern layer 2 is transcribed by the process in which, after the air between a matter 4 to be transcribed and a transcription sheet 3 is evacuated and the transcription sheet 3 is arranged along the matter 4 to be transcribed, a solvent for a base sheet 1 is sprayed from the transcription sheet 3 side so that the transcription sheet 3 is pressed on the matter 4 to be transcribed by the pressure of air and liquid. The solvent is sprayed even after the transcription to remove the base sheet 1 by dissolving.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer method for products having a three-dimensional surface.

[0002]

2. Description of the Related Art Conventionally, the following method has been used to paint a product having a three-dimensional surface by transfer.

First, a transfer sheet having a pattern layer formed on one surface of a water-soluble substrate sheet is floated on the water surface with the pattern layer side facing up. At this time, in order to uniformly dissolve the entire surface of the water-soluble substrate sheet, care must be taken so that the entire surface of the water-soluble substrate sheet is immersed in the water surface at the same time. Next, the water-soluble substrate sheet is dissolved to a semi-dissolved state to leave a semi-fluid pattern layer. Next, the transferred material is gradually submerged in water while being pressed against the semi-fluid pattern layer. At this time, registration is performed at the same time. Further, at this time, bubbles are likely to be caught between the transferred material and the pattern layer, and in order to prevent the bubbles from being caught, it is necessary to devise the molded product such that the molded product is inclined and immersed in water. Next, the pattern layer is transferred to the surface of the transfer target by hydraulic pressure (see FIG. 8). Next, the transferred material to be transferred is taken out from water, and the rest of the water-soluble substrate sheet attached to the surface of the pattern is washed with water and dropped.

[0004]

However, according to the above-mentioned transfer method, the water-soluble base sheet is dissolved on the water surface and the pattern in the semi-fluid state is transferred to the transfer target, so that the water-soluble base sheet is not dissolved. As the process progressed, the patterns fell apart, and the original patterns could not be transferred, resulting in poor positional accuracy.

In addition, in order to prevent the patterns from coming apart, it has been devised to sunk and transfer an object to be transferred when the entire surface of the water-soluble substrate sheet is in a semi-dissolved state. It was very difficult to simultaneously dip the entire surface of the water-soluble substrate sheet on the water surface in order to make the entire surface uniformly semi-dissolved, because the transfer sheet was a thin film.

Further, in order to prevent the patterns from coming apart, it is necessary to sink the transfer target material in good time when the entire surface of the water-soluble substrate sheet is uniformly in a semi-dissolved state. Needed skilled skills.

Further, since the pattern is made to follow the transferred object only by the water pressure from the transfer sheet side, bubbles can be easily caught between the transferred object and the pattern when the transferred object is submerged in water.
In order to prevent this, it was necessary to take measures such as tilting the molded product. Also, because the way the water pressure is applied depends on the water depth,
The transfer pressure was partially different, and the adhesion strength of the design of the obtained product was uneven.

Further, since the transfer work is performed in water, when the product is pulled up from the water after the transfer, water surface tension is applied to the product, and the design may drop off. In addition, the water-soluble base sheet may remain attached to the design surface of the product taken out from the water, and further washing with water is required, which requires many working steps.

Further, in order to perform transfer in water, the bottom area is large enough to float on the water surface in a state where the transfer sheet is spread, and the depth is large enough to immerse all or part of the transferred material in water. Installation of the device was difficult because a large water tank facility was required.

Therefore, the present invention eliminates the above-mentioned drawbacks, has good positional accuracy, does not cause the patterns to fall apart, does not require a skilled technique, and prevents bubble entrapment between the transferred object and the patterns. And the strength of the product design is uniform,
It is an object of the present invention to provide a transfer method in which the design does not drop off after transfer, the number of working steps is small, and the installation of the device is easy.

[0011]

In order to achieve the above object, the present invention uses a transfer method in which an object to be transferred is mounted on a mounting table having suction holes, and a pattern is formed on one surface of a base sheet. The transfer sheet on which the layer is formed is arranged so that the pattern layer side faces the transfer target, and the transfer sheet is closely fixed around the mounting table, and the air between the transfer target and the transfer sheet is sucked through the suction holes. Depressurize the transfer sheet along the transfer target, then spray the base sheet solvent from the transfer sheet side and press the transfer sheet against the transfer target with both air pressure and hydraulic pressure to transfer the pattern layer of the transfer sheet. After the transfer, the substrate sheet was further sprinkled to dissolve and wash off the base sheet.

The transfer sheet may be constructed so that an overcoat layer is formed between the base sheet and the pattern layer. Further, the transfer sheet may be configured such that the pattern layer is formed on one surface of the base sheet, and the adhesive layer is further formed thereon. Further, the adhesive may be applied to the transfer surface of the transfer object before or after the step of mounting the transfer object on the mounting table.

Further, before the transfer sheet is moved along the transfer object by sucking air between the transfer object and the transfer sheet through a suction hole to reduce the pressure, a solvent for softening the base sheet is sprinkled on the transfer sheet. You may comprise. In addition, the transfer sheet may be preheated before the transfer sheet and the transfer sheet are sucked through the suction holes to reduce the pressure to bring the transfer sheet along the transfer object.

The method of the present invention will be described in more detail with reference to the drawings. 1, 2 and 3 are sectional views showing a transfer method in the present invention. FIG. 4 is a sectional view showing an embodiment of the mounting table used in the present invention. 5 and 6 are sectional views showing an embodiment of the transfer sheet used in the present invention. FIG. 7 is a sectional view showing an embodiment of the transfer method in the present invention. 1 is a base sheet, 2 is a pattern layer, 3 is a transfer sheet, 4 is an object to be transferred, 5 is a mounting table, 6 is a suction hole, 7 is a clamp, 8 is an overcoat layer, 9 is an adhesive layer, 10 is a suction device. Are shown respectively.

First, the transfer sheet 3 used in the transfer method of the present invention will be described. As the base sheet 1, a highly flexible film sheet made of polyvinyl alcohol, sodium polyacrylate, polyvinylpyrrolidone, acetyl cellulose, carboxymethyl cellulose, methyl cellulose, sodium alginate, dextrin, casein, etc. is used. The thickness of the base sheet 1 is 5 to 200 μm
The degree is appropriate.

The pattern layer 2 is formed on the base sheet 1.
The pattern layer 2 is provided with an appropriate material depending on the type of solvent for dissolving the base sheet 1 used in the subsequent step. Since water is mainly used as the solvent, normally, for the pattern layer 2, a coloring ink composed of an ordinary pigment or dye, a binder, an additive and the like may be used. When a solvent obtained by adding methyl alcohol to water is used, it is preferable to use a colored ink that uses a resin having no polar group as a binder. When a solvent added with an organic solvent such as ethyl acetate is used, it is preferable to use a colored ink that is made of a two-component curable resin or a thermosetting resin as a binder and is insoluble in these solvents.

The pattern layer 2 may be formed by a usual printing method such as a gravure printing method and a screen printing method. Further, the pattern layer 2 may be a single layer or a multi-layered structure composed of multiple colors. The pattern layer 2 may be a metal thin film layer of aluminum, nickel or the like formed by a vacuum deposition method, a sputtering method, an ion plating method or the like.

Transfer is performed using the transfer sheet 3 having the above-mentioned layer structure. First, the transferred object 4 having a three-dimensional surface is mounted on the mounting table 5. The mounting table 5 is hollow, and a plurality of suction holes 6 are provided on the mounting surface. In addition, this mounting table 5
It is connected to a suction device 10 for sucking air between the mounting table 5, the transfer target 4, and the transfer sheet 3 through the suction holes 6 (see FIG. 1). It should be noted that the mounting table 5 may have a shape in which a wall is formed around it, as shown in FIG.

Next, the transfer sheet 3 is arranged so that the pattern layer 2 side faces the transferred object 4, and the mounting table 5 and the transferred table 4 and the transfer sheet 3 are hermetically sealed. The transfer sheet 3 is tightly fixed around the periphery (see FIG. 1).
Next, the air between the mounting table 5, the transfer target 4 and the transfer sheet 3 is sucked through the suction holes 6 by the suction device 10 to reduce the pressure, and the transfer sheet 3 is moved along the transfer target 4 (see FIG. 2). .

Next, the solvent of the base sheet 1 is sprinkled from the transfer sheet 3 side (see FIG. 2). In order to uniformly disperse the solvent on the entire transfer surface, it is preferable to use a shower having a water supply port that can radially disperse the solvent. Water is mainly used as the solvent of the base sheet 1. Solvents include alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol, ketones such as methyl ethyl ketone and methyl isobutyl ketone, esters such as ethyl acetate and butyl acetate, and aromatic compounds such as toluene and xylene to accelerate solubility. A system solvent or the like may be added.

The transfer sheet 3 is pressed against the transfer target 4 by both the air pressure by suction of air between the mounting table 5, the transfer target 4 and the transfer sheet 3 and the liquid pressure by the solvent spraying, and the pattern layer 2 is pressed. Is transferred to the transfer target 4. Next, after the transfer, the solvent is further sprinkled, and the excess base sheet 1 attached to the surface of the pattern is dissolved and washed off to complete the transfer (see FIG. 3).

Directly in the above method, the transfer sheet 3
The overcoat layer 8 between the base sheet 1 and the pattern layer 2.
May be formed (see FIG. 5). As the overcoat layer 8, a thermosetting resin, a two-component curable resin,
An ultraviolet curable resin or an electron beam curable resin is used. The overcoat layer 8 is formed by printing on the base sheet 1 by a normal printing method such as a gravure printing method or a screen printing method, and curing it. The product transferred by using the transfer sheet having the above-described structure has high strength because the pattern is not easily scratched.

Further, the transfer sheet 3 may have a structure in which the pattern layer 2 is formed on one surface of the base sheet 1, and the adhesive layer 9 is further formed thereon by using a pressure-sensitive or heat-sensitive resin ( (See FIG. 6). The material of the adhesive layer 9 may be selected according to the type of solvent for dissolving the base sheet 1.

When a pressure-sensitive resin is used to form the adhesive layer 9, in order to improve the adhesive force of the adhesive layer 9, the mounting table 5 is used.
Before or after fixing the transfer sheet 3 around the
An activator of an adhesive may be sprinkled on the transfer sheet 1. Further, when the solvent of the base sheet 1 is sprayed from the transfer sheet 3 side, an activator of an adhesive may be added to the solvent. Further, as the solvent of the base sheet 1, a solvent having an activating effect of the adhesive may be used.

When a heat-sensitive resin is used to form the adhesive layer 9, the transfer sheet 3 may be preheated before or after the transfer sheet 3 is adhered and fixed to the periphery of the mounting table 5, and heat-transferred. Good (see Figure 7). Further, when the solvent of the base sheet 1 is sprayed from the transfer sheet 3 side, a solvent which has been warmed in advance may be sprayed to perform the thermal transfer.

Before or after placing the transferred material 4 on the mounting table 5, a pressure-sensitive or heat-sensitive adhesive or the like may be applied to the transferred surface of the transferred material 4. As an adhesive,
It is preferable to use the same kind of adhesive as the adhesive used for forming the adhesive layer 9.

When a pressure-sensitive adhesive is used, in order to improve the adhesive strength of the adhesive, the activator of the adhesive is used before or after the transfer sheet 3 is tightly fixed around the mounting table 5. 4 may be sprayed on. Further, an activator of an adhesive may be added to the solvent when the base sheet 1 is sprayed with the solvent from the transfer sheet 3 side. Further, as the solvent for the base sheet 1, a solvent having an activating effect of an adhesive may be used.

When a heat-sensitive adhesive is used, the transfer object 4 may be preheated before or after the transfer sheet 3 is tightly fixed around the mounting table 5 and then heat-sensitive transfer is performed (see FIG. 7). Further, when the solvent of the base sheet 1 is sprayed from the transfer sheet 3 side, the solvent which has been warmed in advance may be sprayed to perform the heat-sensitive transfer.

Further, in order to make the transfer sheet 3 easily follow the transferred object 4 due to the reduced pressure, before or after the transfer sheet 3 is fixed in close contact with the mounting table 5, a solvent for softening the base sheet 1 is used. It may be sprayed on 3. As the solvent for softening the base sheet 1, water, which is mentioned as a solvent for the base sheet 1, alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol, ketones such as methyl ethyl ketone and methyl isobutyl ketone, and acetic acid are used. It is preferable to use a low-concentration aqueous solution containing a small amount of an ester such as ethyl or butyl acetate, an aromatic solvent such as toluene or xylene, or the like.

Further, in order to make the transfer sheet 3 easily follow the transferred object 4 due to the reduced pressure, the transfer sheet 3 may be preheated before or after the transfer sheet 3 is closely fixed to the periphery of the mounting table 5 (( (See FIG. 7).

Further, in order to make the transfer sheet 3 more flexible and easy to follow the transferred object 4, before or after the transfer sheet 3 is tightly fixed around the mounting table 5, the preheating of the transfer sheet 3 and the base sheet 1 are performed. Both steps of spraying a solvent that makes the resin flexible to the transfer sheet 3 may be performed.

[0032]

According to the transfer method of the present invention, the air between the transfer target and the transfer sheet is sucked through the suction holes to reduce the pressure, and the transfer sheet is moved along the transfer target by air pressure. Spray the solvent on the sheet. At this time, since the base sheet is dissolved in the solvent and easily expands and contracts, the transfer sheet adheres to every corner of the transferred object while expanding and contracting by hydraulic pressure. Therefore, the transfer sheet can be transferred to a three-dimensional surface having complicated unevenness that does not extend to every corner only by air pressure.

[0033]

【Example】

First Example A transfer sheet 3 in which a pattern layer 2 is formed on a surface of a base sheet 1 made of polyvinyl alcohol by a colored ink made of polyester / urethane resin as a binder.
Is installed so that the pattern layer 2 is located on the transfer target 4 side with respect to the transfer target 4 placed on the mounting table 5 having the suction holes 6, and the transfer target 4 and the transfer sheet 3 are in a hermetically sealed state. The transfer sheet 3 is tightly fixed around the mounting table 5 by the clamp 7 (see FIG. 1). Furthermore, this transferred object 4
The air between the transfer sheet 3 and the transfer sheet 3 is sucked to reduce the pressure, and the transfer sheet 3 is moved along the transfer target 4 by air pressure, and then a solvent obtained by adding isopropyl alcohol to water is sprayed from the transfer sheet 3 side by a shower (Fig. 2). In this way, after depressurizing the air between the transfer sheet 3 and the transfer target 4, the solvent of the base sheet 1 is sprayed, so that the transfer sheet 3 is transferred to the transfer target 4 by both the air pressure and the liquid pressure. Press and pattern 2
Is transferred to the transfer target 4, and after the transfer, the solvent is continuously sprinkled to dissolve and wash the base sheet 1 (see FIG. 3).

Second Example A transfer sheet 3 (see FIG. 6) having a pattern layer 2 formed on one surface of a base sheet 1 and a heat-sensitive adhesive layer 9 made of urethane resin as a binder formed thereon is further formed on the pattern layer 2. It is installed so that the pattern layer 2 is located on the transfer target 4 side with respect to the transfer target 4 placed on the mounting table 5 provided with the suction holes 6, and after preheating the transfer sheet 3 from above with a heater, Is tightly fixed to the mounting table 5 by the clamp 7, and transfer is performed by the transfer method described above (see FIG. 7). By doing so, the adhesive force of the design is improved, and the design is more strongly painted. Further, the preheated transfer sheet 3 becomes more flexible and easily conforms to the shape of the transferred object 4.

[0035]

According to the transfer method of the present invention, the air between the transfer target and the transfer sheet is decompressed, and the transfer sheet is moved along the transfer target by air pressure. It is possible to transfer according to the pattern formed on the base sheet, and the positional accuracy is good.

Further, since there is no particular need to uniformly dissolve the entire surface of the base sheet, the solvent spraying operation of the base sheet for dissolving the base sheet is extremely simple. Further, the air between the transfer target and the transfer sheet is depressurized, and the transfer sheet is moved along the transfer target by air pressure, so that the registration can be performed relatively easily.

Further, since the air between the transferred material and the transfer sheet is sucked to reduce the pressure, it is possible to prevent bubble entrapment between the transferred material and the pattern. In addition, the air between the transfer target and the transfer sheet is sucked through the suction holes to reduce the pressure, and the transfer sheet is moved along the transfer target by air pressure, and the solvent of the base sheet is sprayed from the transfer sheet side by using a shower or the like. Since the transfer sheet is pressed against the transfer target with both the pressure and the liquid pressure, the air pressure and the liquid pressure are evenly applied to the entire transfer surface, and the strength of the design of the finished product becomes uniform.

Further, since the transfer is carried out in the air, there is no concern that the design will fall off from the product after transfer. In addition, after the transfer sheet is moved along the transfer target by air pressure, the solvent of the base sheet is sprayed from the transfer sheet side, so that the transfer sheet is pressed against the transfer target by both air pressure and liquid pressure. After the transfer and the transfer, the solvent of the base sheet is further sprayed to dissolve and wash the base sheet. Therefore, the transfer operation and the base sheet washing operation can be performed almost simultaneously as one continuous operation, and the number of steps is small.

Further, since no large water tank facility is required, the installation of the device is easy. Also, after the transfer sheet is moved along the transfer target by air pressure, by spraying the solvent of the base sheet from the transfer sheet side, the solvent can be applied to the complicated three-dimensional surface where the transfer sheet is difficult to follow every corner only by air pressure. The base sheet can be melted and spread along every corner.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a transfer method of the present invention.

FIG. 2 is a cross-sectional view showing a transfer method of the present invention.

FIG. 3 is a sectional view showing a transfer method of the present invention.

FIG. 4 is a sectional view showing an embodiment of a mounting table used in the present invention.

FIG. 5 is a cross-sectional view showing one embodiment of a transfer sheet used in the present invention.

FIG. 6 is a cross-sectional view showing one embodiment of a transfer sheet used in the present invention.

FIG. 7 is a sectional view showing an embodiment of the transfer method of the present invention.

FIG. 8 is a cross-sectional view showing a conventional transfer method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base sheet 2 Design layer 3 Transfer sheet 4 Transferred object 5 Mounting table 6 Suction hole 7 Clamp 8 Overcoat layer 9 Adhesive layer 10 Suction device

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[Procedure amendment]

[Submission date] June 16, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of transfer method

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer method for products having a three-dimensional surface.

[0002]

2. Description of the Related Art Conventionally, the following method has been used to paint a product having a three-dimensional surface by transfer.

First, a transfer sheet having a pattern layer formed on one surface of a water-soluble substrate sheet is floated on the water surface with the pattern layer side facing up. At this time, in order to uniformly dissolve the entire surface of the water-soluble substrate sheet, care must be taken so that the entire surface of the water-soluble substrate sheet is immersed in the water surface at the same time. Next, the water-soluble substrate sheet is dissolved to a semi-dissolved state to leave a semi-fluid pattern layer. Next, the transferred material is gradually submerged in water while being pressed against the semi-fluid pattern layer. At this time, registration is performed at the same time. Further, at this time, bubbles are likely to be caught between the transferred material and the pattern layer, and in order to prevent the bubbles from being caught, it is necessary to devise the molded product such that the molded product is inclined and immersed in water. Next, the pattern layer is transferred to the surface of the transfer target by hydraulic pressure (see FIG. 8). Next, the transferred material to be transferred is taken out from water, and the rest of the water-soluble substrate sheet attached to the surface of the pattern is washed with water and dropped.

[0004]

However, according to the above-mentioned transfer method, the water-soluble base sheet is dissolved on the water surface and the pattern in the semi-fluid state is transferred to the transfer target, so that the water-soluble base sheet is not dissolved. As the process progressed, the patterns fell apart, and the original patterns could not be transferred, resulting in poor positional accuracy.

In addition, in order to prevent the patterns from coming apart, it has been devised to sunk and transfer an object to be transferred when the entire surface of the water-soluble substrate sheet is in a semi-dissolved state. It was very difficult to simultaneously dip the entire surface of the water-soluble substrate sheet on the water surface in order to make the entire surface uniformly semi-dissolved, because the transfer sheet was a thin film.

Further, in order to prevent the patterns from coming apart, it is necessary to sink the transfer target material in good time when the entire surface of the water-soluble substrate sheet is uniformly in a semi-dissolved state. Needed skilled skills.

Further, since the pattern is made to follow the transferred object only by the water pressure from the transfer sheet side, bubbles can be easily caught between the transferred object and the pattern when the transferred object is submerged in water.
In order to prevent this, it was necessary to take measures such as tilting the molded product. Also, because the way the water pressure is applied depends on the water depth,
The transfer pressure was partially different, and the adhesion strength of the design of the obtained product was uneven.

Further, since the transfer work is performed in water, when the product is pulled up from the water after the transfer, water surface tension is applied to the product, and the design may drop off. In addition, the water-soluble base sheet may remain attached to the design surface of the product taken out from the water, and further washing with water is required, which requires many working steps.

Further, in order to perform transfer in water, the bottom area is large enough to float on the water surface in a state where the transfer sheet is spread, and the depth is large enough to immerse all or part of the transferred material in water. Installation of the device was difficult because a large water tank facility was required.

Therefore, the present invention eliminates the above-mentioned drawbacks, has good positional accuracy, does not cause the patterns to fall apart, does not require a skilled technique, and prevents bubble entrapment between the transferred object and the patterns. And the strength of the product design is uniform,
It is an object of the present invention to provide a transfer method in which the design does not drop off after transfer, the number of working steps is small, and the installation of the device is easy.

[0011]

In order to achieve the above object, the present invention uses a transfer method in which an object to be transferred is mounted on a mounting table having suction holes, and a pattern is formed on one surface of a base sheet. The transfer sheet on which the layer is formed is arranged so that the pattern layer side faces the transfer target, and the transfer sheet is closely fixed around the mounting table, and the air between the transfer target and the transfer sheet is sucked through the suction holes. Depressurize the transfer sheet along the transfer target, then spray the dissolving agent of the base sheet from the transfer sheet side and press the transfer sheet against the transfer target with both air pressure and liquid pressure to transfer the pattern layer of the transfer sheet. After the transfer, the dissolving agent was further sprinkled to dissolve and wash off the base sheet.

The transfer sheet may be constructed so that an overcoat layer is formed between the base sheet and the pattern layer. Further, the transfer sheet may be configured such that the pattern layer is formed on one surface of the base sheet, and the adhesive layer is further formed thereon. Further, the adhesive may be applied to the transfer surface of the transfer object before or after the step of mounting the transfer object on the mounting table.

Further, before the transfer sheet is moved along the transfer object by sucking air from the transfer object and the transfer sheet through a suction hole to reduce the pressure, a dissolving agent for softening the base sheet is sprinkled on the transfer sheet. You may comprise. In addition, the transfer sheet may be preheated before the transfer sheet and the transfer sheet are sucked through the suction holes to reduce the pressure to bring the transfer sheet along the transfer object.

The method of the present invention will be described in more detail with reference to the drawings. 1, 2 and 3 are sectional views showing a transfer method in the present invention. FIG. 4 is a sectional view showing an embodiment of the mounting table used in the present invention. 5 and 6 are sectional views showing an embodiment of the transfer sheet used in the present invention. FIG. 7 is a sectional view showing an embodiment of the transfer method in the present invention. 1 is a base sheet, 2 is a pattern layer, 3 is a transfer sheet, 4 is an object to be transferred, 5 is a mounting table, 6 is a suction hole, 7 is a clamp, 8 is an overcoat layer, 9 is an adhesive layer, 10 is a suction device. Are shown respectively.

First, the transfer sheet 3 used in the transfer method of the present invention will be described. As the base sheet 1, a highly flexible film sheet made of polyvinyl alcohol, sodium polyacrylate, polyvinylpyrrolidone, acetyl cellulose, carboxymethyl cellulose, methyl cellulose, sodium alginate, dextrin, casein, etc. is used. The thickness of the base sheet 1 is 5 to 200.
About μm is appropriate.

The pattern layer 2 is formed on the base sheet 1.
The pattern layer 2 is provided with an appropriate material according to the type of the dissolving agent for dissolving the base sheet 1 used in the subsequent step.
Since water is mainly used as the solubilizer, the pattern layer 2 may be usually formed by using a pigment or dye, a coloring ink containing an adder, an additive and the like. Further, when using a dissolving agent obtained by adding methyl alcohol to water, it is preferable to use a colored ink using a resin having no polar group as a binder. When using a dissolving agent to which an organic solvent such as ethyl acetate is added, it is preferable to use a colored ink that is a two-component curable resin or a thermosetting curable resin and is insoluble in these dissolving agents as a binder. .

The pattern layer 2 may be formed by a usual printing method such as a gravure printing method and a screen printing method. Further, the pattern layer 2 may be a single layer or a multi-layered structure composed of multiple colors. The pattern layer 2 may be a metal thin film layer of aluminum, nickel or the like formed by a vacuum deposition method, a sputtering method, an ion plating method or the like.

Transfer is performed using the transfer sheet 3 having the above-mentioned layer structure. First, the transferred object 4 having a three-dimensional surface is mounted on the mounting table 5. The mounting table 5 is hollow, and a plurality of suction holes 6 are provided on the mounting surface. In addition, this mounting table 5
It is connected to a suction device 10 for sucking air between the mounting table 5, the transfer target 4, and the transfer sheet 3 through the suction holes 6 (see FIG. 1). It should be noted that the mounting table 5 may have a shape in which a wall is formed around it, as shown in FIG.

Next, the transfer sheet 3 is arranged so that the pattern layer 2 side faces the transferred object 4, and the mounting table 5 and the transferred table 4 and the transfer sheet 3 are hermetically sealed. The transfer sheet 3 is tightly fixed around the periphery (see FIG. 1).
Next, the air between the mounting table 5, the transfer target 4 and the transfer sheet 3 is sucked through the suction holes 6 by the suction device 10 to reduce the pressure, and the transfer sheet 3 is moved along the transfer target 4 (see FIG. 2). .

Next, the base sheet 1 is transferred from the transfer sheet 3 side.
Disperse the lysing agent (see Figure 2). Dissolves uniformly over the entire transfer surface
To disperse the disintegrant , it is preferable to use a shower having a water supply port that can disperse the dissolving agent radially. Base sheet 1
Water is mainly used as a dissolving agent for the. Dissolving agents include methyl alcohol, ethyl alcohol, and
Alcohols such as isopropyl alcohol, ketones such as methyl ethyl ketone and methyl isobutyl ketone,
Esters such as ethyl acetate and butyl acetate, toluene,
An aromatic solvent such as xylene may be added.

The transfer sheet 3 is pressed against the transfer target 4 by both the air pressure by suction of air between the mounting table 5, the transfer target 4 and the transfer sheet 3 and the liquid pressure by spraying the dissolving agent , and the pattern layer 2 is transferred to the transfer target 4. Next, after the transfer, the dissolving agent is continuously sprayed to dissolve and wash off the excess base sheet 1 adhering to the surface of the pattern to complete the transfer (see FIG. 3).

Directly in the above method, the transfer sheet 3
The overcoat layer 8 between the base sheet 1 and the pattern layer 2.
May be formed (see FIG. 5). As the overcoat layer 8, a thermosetting resin, a two-liquid sanding resin,
An ultraviolet curable resin or an electron beam curable resin is used. The overcoat layer 8 is formed by printing on the base sheet 1 by a normal printing method such as a gravure printing method or a screen printing method, and curing it. The product transferred by using the transfer sheet having the above-described structure has high strength because the pattern is not easily scratched.

Further, the transfer sheet 3 may have a structure in which the pattern layer 2 is formed on one surface of the base sheet 1, and the adhesive layer 9 is further formed thereon by using a pressure-sensitive or heat-sensitive resin ( (See FIG. 6). The material of the adhesive layer 9 may be selected according to the type of the dissolving agent for dissolving the base sheet 1.

When a pressure-sensitive resin is used to form the adhesive layer 9, in order to improve the adhesive force of the adhesive layer 9, the mounting table 5 is used.
Before or after fixing the transfer sheet 3 around the
An activator of an adhesive may be sprinkled on the transfer sheet 1. Further, when the dissolving agent for the base sheet 1 is sprayed from the transfer sheet 3 side, an activator of an adhesive may be added to the dissolving agent .
Further, as a solubilizer for the substrate sheet 1 may be used dissolving agent having the action of adhesive.

When a heat-sensitive resin is used to form the adhesive layer 9, the transfer sheet 3 may be preheated before or after the transfer sheet 3 is adhered and fixed to the periphery of the mounting table 5, and heat-transferred. Good (see Figure 7). Further, when the dissolving agent for the base sheet 1 is sprayed from the transfer sheet 3 side, a pre-warmed dissolving agent may be sprayed for thermal transfer.

Before or after placing the transferred material 4 on the mounting table 5, a pressure-sensitive or heat-sensitive adhesive or the like may be applied to the transferred surface of the transferred material 4. As an adhesive,
It is preferable to use the same kind of adhesive as the adhesive used for forming the adhesive layer 9.

When a pressure-sensitive adhesive is used, in order to improve the adhesive strength of the adhesive, the activator of the adhesive is used before or after the transfer sheet 3 is tightly fixed around the mounting table 5. 4 may be sprayed on. Further, when the dissolving agent of the base sheet 1 is sprayed from the transfer sheet 3 side, an activator of an adhesive may be added to the dissolving agent . In addition, melting of the base sheet 1
The dissolution agent having the action of adhesive solution agent may be used.

When a heat-sensitive adhesive is used, the transfer object 4 may be preheated before or after the transfer sheet 3 is tightly fixed around the mounting table 5 and then heat-sensitive transfer is performed (see FIG. 7). In addition, when the dissolving agent for the base sheet 1 was sprayed from the transfer sheet 3 side, it was warmed in advance.
You may spray | dissolve a dissolving agent and carry out heat-sensitive transfer.

Further, in order to make the transfer sheet 3 easily follow the transferred object 4 due to the pressure reduction, before or after the transfer sheet 3 is closely fixed around the mounting table 5, a dissolving agent for making the base sheet 1 flexible is transferred. It may be sprayed on the sheet 3. The dissolving agent for making the base sheet 1 flexible includes water, which is mentioned as the dissolving agent for the base sheet 1, or alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol, and ketones such as methyl ethyl ketone and methyl isoptyl ketone. It is advisable to use a low-concentration aqueous solution containing a small amount of compounds, esters such as ethyl acetate and butyl acetate, and aromatic solvents such as toluene and xylene.

Further, in order to make the transfer sheet 3 easily follow the transferred object 4 due to the reduced pressure, the transfer sheet 3 may be preheated before or after the transfer sheet 3 is closely fixed to the periphery of the mounting table 5 (( (See FIG. 7).

Further, in order to make the transfer sheet 3 more flexible and easy to follow the transferred object 4, before or after the transfer sheet 3 is tightly fixed around the mounting table 5, the preheating of the transfer sheet 3 and the base sheet 1 are performed. Both steps of spraying the dissolving agent for making the flexible on the transfer sheet 3 may be performed.

[0032]

According to the transfer method of the present invention, the air between the transfer target and the transfer sheet is sucked through the suction holes to reduce the pressure, and the transfer sheet is moved along the transfer target by air pressure. Spread the sheet lysing agent . At this time, since the base sheet is dissolved by the dissolving agent and easily expands and contracts, the transfer sheet adheres to every corner of the transferred object while expanding and contracting by hydraulic pressure. Therefore, the transfer sheet can be transferred to a three-dimensional surface having complicated unevenness that does not extend to every corner only by air pressure.

[0033]

Example 1 A transfer sheet 3 in which a pattern layer 2 is formed on a surface of a base sheet 1 made of polyvinyl alcohol by a colored ink made of polyester / urethane resin as a binder.
Is installed so that the pattern layer 2 is located on the transfer target 4 side with respect to the transfer target 4 placed on the mounting table 5 having the suction holes 6, and the transfer target 4 and the transfer sheet 3 are in a hermetically sealed state. The transfer sheet 3 is tightly fixed around the mounting table 5 by the clamp 7 (see FIG. 1). Furthermore, this transferred object 4
The air between the transfer sheet 3 and the transfer sheet 3 is sucked to reduce the pressure, the transfer sheet 3 is moved along the transfer target 4 by air pressure, and then a dissolving agent obtained by adding isopropyl alcohol to water is sprayed from the transfer sheet 3 side by a shower ( See FIG. 2). In this way, the air between the transfer sheet 3 and the transfer target 4 is depressurized, and then the dissolving agent of the base sheet 1 is sprayed, so that the transfer sheet 3 is transferred to the transfer target 4 by both the air pressure and the liquid pressure. Then, the pattern layer 2 is transferred to the transfer target 4 by pressing to, and after the transfer, the dissolving agent is continuously sprinkled to dissolve and wash off the base sheet 1 (see FIG. 3).

Second Example A transfer sheet 3 (see FIG. 6) having a pattern layer 2 formed on one surface of a base sheet 1 and a heat-sensitive adhesive layer 9 made of urethane resin as a binder formed thereon is further formed on the pattern layer 2. It is installed so that the pattern layer 2 is located on the transfer target 4 side with respect to the transfer target 4 placed on the mounting table 5 provided with the suction holes 6, and after preheating the transfer sheet 3 from above with a heater, Is tightly fixed to the mounting table 5 by the clamp 7, and transfer is performed by the transfer method described above (see FIG. 7). By doing so, the adhesive force of the design is improved, and the design is more strongly painted. Further, the preheated transfer sheet 3 becomes more flexible and easily conforms to the shape of the transferred object 4.

[0035]

According to the transfer method of the present invention, the air between the transfer target and the transfer sheet is decompressed, and the transfer sheet is moved along the transfer target by air pressure. It is possible to transfer according to the pattern formed on the base sheet, and the positional accuracy is good.

Further, since it is not particularly necessary to uniformly dissolve the entire surface of the base sheet, the operation of spraying the base sheet with the dissolving agent for the base sheet is extremely simple.
Further, the air between the transfer target and the transfer sheet is depressurized, and the transfer sheet is moved along the transfer target by air pressure, so that the registration can be performed relatively easily.

Further, since the air between the transferred material and the transfer sheet is sucked to reduce the pressure, it is possible to prevent bubble entrapment between the transferred material and the pattern. Further, by sucking air between the transfer target and the transfer sheet through a suction hole to reduce the pressure, the transfer sheet is moved along the transfer target by air pressure, and the dissolving agent of the base sheet is sprayed from the transfer sheet side by a shower or the like. Since transfer is performed by pressing the transfer sheet against the transfer target with both air pressure and liquid pressure, air pressure and liquid pressure are uniformly applied to the entire transfer surface, and the strength of the design of the finished product becomes uniform.

Further, since the transfer is carried out in the air, there is no concern that the design will fall off from the product after transfer. Also, after the transfer sheet is moved along the transfer target by air pressure, the dissolving agent of the base sheet is sprayed from the transfer sheet side so that the transfer sheet is pressed against the transfer target by both air pressure and liquid pressure. After the transfer, after the transfer, the dissolving agent of the base sheet is further sprayed to dissolve and wash the base sheet, so that the transfer work and the work of washing the base sheet can be performed almost simultaneously as a series of operations. Few.

Further, since no large water tank facility is required, the installation of the device is easy. Moreover, after placed along the transfer sheet to the transfer target pneumatically, by spraying the dissolving agent of the base sheet from the transfer sheet side, even difficult complicated solid surface along only air pressure transfer sheet every corner, soluble
It is possible to dissolve the base sheet with the disintegrating agent and spread it along every corner.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a transfer method of the present invention.

FIG. 2 is a cross-sectional view showing a transfer method of the present invention.

FIG. 3 is a sectional view showing a transfer method of the present invention.

FIG. 4 is a sectional view showing an embodiment of a mounting table used in the present invention.

FIG. 5 is a cross-sectional view showing one embodiment of a transfer sheet used in the present invention.

FIG. 6 is a cross-sectional view showing one embodiment of a transfer sheet used in the present invention.

FIG. 7 is a sectional view showing an embodiment of the transfer method of the present invention.

FIG. 8 is a cross-sectional view showing a conventional transfer method.

[Explanation of reference numerals] 1 base sheet 2 pattern layer 3 transfer sheet 4 transferred object 5 mounting table 6 suction hole 7 clamp 8 overcoat layer 9 adhesive layer 10 suction device

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 6]

[Figure 7]

[Figure 8]

Claims (6)

[Claims] 1. An object to be transferred is placed on a mounting table having suction holes, and a transfer sheet having a pattern layer formed on one surface of a base sheet is placed with the pattern layer side facing the object to be transferred. The transfer sheet is closely attached and fixed around the mounting table, and the air between the transfer target and the transfer sheet is sucked through the suction holes to reduce the pressure so that the transfer sheet follows the transfer target and then the solvent of the base sheet is sprayed from the transfer sheet side. Then, the transfer sheet is pressed against the transfer target with both air pressure and liquid pressure to transfer the pattern layer of the transfer sheet, and after transfer, the solvent is continuously sprinkled to dissolve and wash off the base sheet. Method. 2. The transfer method according to claim 1, wherein the transfer sheet is configured such that an overcoat layer is formed between the base sheet and the pattern layer. 3. The transfer method according to claim 1, wherein the transfer sheet is configured such that a pattern layer is formed on one surface of the base sheet and an adhesive layer is further formed thereon. 4. The transfer method according to claim 1, wherein an adhesive is applied to the transfer surface of the transfer object before or after the step of mounting the transfer object on the mounting table. 5. The solvent for softening the base sheet is sprinkled on the transfer sheet before the transfer sheet and the transfer sheet are sucked through a suction hole to reduce the pressure to bring the transfer sheet along the transfer sheet. The transfer method according to any one of 1 to 4. 6. The transfer sheet according to claim 1, wherein the transfer sheet is preheated before the transfer sheet and the transfer sheet are sucked through a suction hole to reduce the pressure to bring the transfer sheet along the transfer object. The described transfer method.