JPH0958121A - 3D image formation method - Google Patents

Abstract

(57) [Abstract] [Problem] Forming an arbitrary three-dimensional image on an arbitrary transfer target,
(EN) Provided is a three-dimensional image forming method which does not need to take into consideration the situation of storage and handling of a transferred material after three-dimensional image formation and has a low running cost. SOLUTION: An adhesive substance 13 containing carbon black is transferred to a transfer target 11 by a thermal head based on an image signal. Next, the thermal expansion agent 2 is applied to the transfer surface of the adhesive substance 13.
1 is attached by a pressure roller. And the light source 27
When irradiated with light, the carbon black in the adhesive substance 13 generates heat, the thermal expansion agent 21 is heated and expanded, and a three-dimensional image is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image forming method.

[0002]

2. Description of the Related Art Conventionally, as a stereoscopic image forming method, for example, the method described in Japanese Patent Publication No. 59-35359 has been disclosed. In this method, a desired image is formed on the surface of the heat-expandable sheet with a material having a higher light-absorbing property than that of the sheet, and then the surface of the sheet is irradiated with light to selectively heat and raise the image portion due to the difference in light absorption. Let

Further, in the image forming method disclosed in Japanese Patent Laid-Open No. 61-72589, an image having high light absorption is formed by a thermal transfer method. Then, light irradiation is performed using this image to form an uneven pattern corresponding to the image signal on the expansion recording body.

Therefore, according to these methods, the concavo-convex pattern can be formed on the sheet by a simple operation.

[0005]

However, since the foamable sheet used in this method expands and expands due to heat, it cannot be placed in a state where it is heated after the three-dimensional image is formed. There is a problem that the situation is limited. For example, when a foamable sheet having a three-dimensional image formed thereon is attached to a container or pipe in which hot water is used, the hot water causes the foamable sheet to expand and expand, and the three-dimensional image disappears.

Further, the foaming sheet is expensive, and since only a part of the three-dimensional image is used for forming a three-dimensional image, the running cost is high.

The present invention has been made in order to solve the above-mentioned problems, and forms an arbitrary three-dimensional image on an arbitrary transferred material, and after the formation of the three-dimensional image, the status of storage and handling of the transferred material is improved. It is an object of the present invention to provide a stereoscopic image forming method that does not need to be taken into consideration and has a low running cost.

[0008]

In order to achieve this object, in the three-dimensional image forming method according to the first aspect of the present invention, an adhesive substance containing a thermal energy converting agent on a transfer target according to an image signal. Image by transferring a heat expansion agent that adheres to the sticky substance on the transfer target and heats the heat energy conversion agent in the sticky substance on the transfer target to heat and expand the heat expansion agent. An uneven pattern corresponding to a signal is formed.

Further, in the three-dimensional image forming method according to the second aspect of the present invention, a thermal expansion agent which transfers an adhesive substance on a transfer object according to an image signal and expands by heating containing a thermal energy conversion agent. To the sticky substance on the transfer target,
The heat energy conversion agent in the thermal expansion agent is caused to generate heat to thermally expand the thermal expansion agent, thereby forming an uneven pattern corresponding to an image signal.

Further, in the image forming method according to the third aspect of the present invention, an adhesive substance containing a heat energy converting agent is transferred onto a transfer target according to an image signal, and heating is performed containing the heat energy converting agent. The thermal expansion agent that expands due to is attached to the adhesive substance on the transfer target material, and the thermal energy conversion agent contained in the adhesive substance and the thermal expansion agent is heated to expand the thermal expansion agent in response to the image signal. An uneven pattern is formed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment embodying the stereoscopic image forming method of claim 1 of the present invention will be described below with reference to FIGS. 1, 2 and 3.

First, as shown in FIG. 1, a pressure-sensitive adhesive sheet 15 holding a pressure-sensitive adhesive substance 13 containing carbon black as a heat energy converting agent is superposed on a transfer-receiving member 11, and the transfer means is transferred from the back surface of the pressure-sensitive adhesive sheet 15. The thermal head 17 is pressed. The thermal head 17 is controlled by a control circuit (not shown) based on the image signal to generate heat,
The adhesive substance 13 at a corresponding position on the adhesive sheet 15 is melted and fusion-transferred to the surface of the transferred body 11. In this way, only the image portion of the adhesive substance 13 on the adhesive sheet 15 is transferred to the transfer target 11.

The transferred body 11 may be a solid having an arbitrary shape and material. As the heat energy conversion agent, any material other than carbon black may be used as long as it can convert light such as ITO and water and electromagnetic waves into heat energy.
You may use only 1 type and may mix 2 or more types. As the adhesive substance 13, wax-based, acrylic-based,
Adhesives such as silicone type and rubber type are used.

Further, in the present embodiment, the thermal head 17 of the heating type is used as the transfer means of the adhesive substance 13 to the transfer object 11, but a heating transfer means other than the thermal head 17 may be used. Is. For example,
The back surface of the pressure-sensitive adhesive sheet 15 is scanned with laser light whose intensity is modulated based on an image signal to heat the pressure-sensitive adhesive sheet 15 to melt the pressure-sensitive adhesive substance 13 at a position corresponding to the pressure-sensitive adhesive sheet 15 irradiated with the laser beam of high intensity. The fusion transfer may be performed on the surface of the transfer body 11.

A pressure type transfer means can also be used as the transfer means. For example, pressure may be applied from the back surface of the pressure-sensitive adhesive sheet 15 by a pressure mechanism such as an impact head based on an image signal to transfer the pressure-sensitive adhesive substance 13 to the surface of the transfer target 11.

An ink jet type transfer means can be used. For example, the adhesive substance 13 may be fly-transferred to the surface of the transfer target 11 based on the image signal. Through the above steps, an image is formed on the transferred material 11 by the adhesive material 13.

Next, as shown in FIG. 2, the thermal expansion agent 21 holding surface of the thermal expansion agent sheet 23 holding the thermal expansion agent 21 is overlapped with the transfer surface of the adhesive material 13 of the transfer object 11, and the thermal expansion is performed. From the back surface of the agent sheet 23, the pressure roller 2 as an attaching means.
Pressurize with 5. The thermal expansion agent 21 adheres to the adhesive substance 13 formed on the transfer target 11 corresponding to the image signal. In this way, the thermal expansion agent 2 on the thermal expansion agent sheet 23
Only the image portion 1 adheres to the adhesive substance 13 on the transfer target 11.

As the thermal expansion agent, bicarbonates such as sodium hydrogencarbonate, various peroxides, diazoaminobenzene,
Thermoplastic materials in which substances that generate non-toxic gas by thermal decomposition of azo compounds such as aluminum radical parabonate and azobisisobutyronitrile are dispersed, or polystyrene, polyvinyl chloride, polyvinylidene chloride, poly A shell material made of vinyl acetate, polyacrylic acid ester, polyacrylonitrile, polybutadiene, or a copolymer thereof is filled with a low boiling point vaporizable substance such as propane, butane, or propane, and has a diameter of 10 to 20.
μm microencapsulated thermally expandable capsules are used.

Further, as the attaching means, in addition to the pressure type used in the present embodiment, a scattering type is used. For example, the thermal expansion agent 21 can be sprinkled on the entire transfer surface of the adhesive substance 13 of the transfer target 11 to remove the thermal expansion agent 21 other than the thermal expansion agent 21 attached to the adhesive substance 13.

A coating type is used as another attaching means. For example, the thermal expansion agent 21 carried by a carrier such as an electrostatic drum can be applied and adhered onto the adhesive substance 13 on the transferred body 11.

A heating type is used as another attaching means.
For example, the thermal expansion agent 21 holding surface of the sheet on which the thermal expansion agent 21 is held by the hot melt binder and the transfer target 11
The heat-expanding agent 13
By heating from the back surface of the holding sheet with a heating mechanism such as a heating roller, the thermal expansion agent 21 can be applied and adhered onto the adhesive substance 13 on the transfer target 11.

Through the above steps, a thermally expansive image is formed on the transferred body 11.

Next, as shown in FIG.
When light is emitted from the light source 27 to the image forming surface, the carbon black in the adhesive substance 13 absorbs the light and generates heat. Then, the thermal expansion agent 21 attached on the adhesive substance 13 transferred onto the transfer target 11 is heated and expanded.

As the heat generating means, an electromagnetic wave type can be used in addition to the exposure type shown in the present embodiment. For example, if a binder containing water instead of the carbon black of the present embodiment, PEG (polyethylene glycol), PVA (polyvinyl alcohol) or the like is mixed with an adhesive substance and microwave is applied, the binder Generates heat, and the thermal expansion agent 21 attached on the adhesive substance 13 transferred onto the transfer target body 11 is heated and expands.

As described above, the heat energy converting agent determines the heat energy converting agent, or the heat energy converting agent determines the heat generating method.

Through the above steps, a three-dimensional image is formed on the transferred body 11.

Next, a second embodiment embodying the stereoscopic image forming method according to claim 2 of the present invention will be described with reference to FIGS. 4, 5 and 6.

First, as shown in FIG. 4, a pressure-sensitive adhesive sheet 35 holding a pressure-sensitive adhesive substance 33 is superposed on the transferred material 31, and the back surface of the pressure-sensitive adhesive sheet 35 is controlled by a laser head 37 as a transfer means, which is not shown in the figure. The laser light whose intensity is modulated based on the image signal from the device is scanned and heated to melt the adhesive substance 33 at the location corresponding to the adhesive sheet 35 irradiated with the laser light of high intensity to thereby transfer the surface of the transfer target 31. Transfer and fuse to. Through the above steps, an image is formed by the adhesive substance 33 on the transfer target 31.

Next, as shown in FIG. 5, a thermal expansion agent in which the thermal expansion agent 41 is held on the transfer surface of the transfer material 31 by the PVA containing water, which is a thermal energy conversion agent, on the transfer surface of the adhesive material 33. Overlapping the thermal expansion agent 41 holding surface of the sheet 43,
By heating from the back surface of the thermal expansion agent sheet 43 by the heating roller 45 at a temperature lower than the expansion temperature of the thermal expansion agent 41, the thermal expansion agent 41 can be applied and adhered onto the adhesive substance 33 on the transfer target 31. it can.

Through the above steps, a thermally expansive image is formed on the transferred material 31.

Next, as shown in FIG.
When microwaves are radiated from the microwave transmitter 47 on the image forming surface, the moisture in PVA, which is the binder of the thermal expansion agent 41, absorbs the microwaves and generates heat. Then, the thermal expansion agent 41 adhered on the adhesive substance 33 transferred onto the transfer target 31 is heated and expanded.

Through the above steps, a three-dimensional image is formed on the transferred body 31.

Finally, FIG. 7, FIG. 8 and FIG. 9 show a third embodiment embodying the three-dimensional image forming method of claim 3 of the present invention.
This will be described with reference to FIG.

First, as shown in FIG.
The adhesive substance 53 containing carbon black as a thermal energy conversion agent is ejected by the inkjet head 57 controlled by a control circuit (not shown) based on an image signal, and the adhesive substance 53 is fly-transferred onto the surface of the transfer target 51. Through the above steps, the adhesive substance 53 is formed on the transferred body 51.
Image is formed.

Next, as shown in FIG. 8, thermal expansion particles in which PVA containing water, which is a thermal energy conversion agent, and a thermal expansion agent are mixed on the transfer surface of the adhesive material 53 of the transferred material 51. 61 is sprayed from the sprayer 63, and the fan 65 removes the thermal expansion particles 61 other than the thermal expansion particles 61 attached on the adhesive substance 53.

Through the above steps, a thermally expansive image is formed on the transferred body 51.

Next, as shown in FIG.
When light is first emitted from the light source 67 onto the image forming surface, the carbon black in the adhesive substance 53 absorbs the light and generates heat. Then, the thermal expansion particles 61 adhered on the adhesive substance 53 transferred onto the transferred body 51 are heated and expanded. At this time, in particular, the thermal expansion particles 61 in contact with the adhesive substance 53 and the thermal expansion particles 61 in the vicinity thereof are likely to be thermally expanded.

Continuously, on the image forming surface of the transferred body 51,
When microwaves are radiated from the microwave transmitter 69, the water contained in the PVA in the thermal expansion particles 61 absorbs the microwaves to generate heat. Then, the thermal expansion agent 61 attached on the adhesive material 53 transferred onto the transfer target 51 is heated and expanded. At this time, in particular, the thermal expansion particles 61 not in contact with the adhesive substance 53, that is, facing the microwave transmitter 69.
Are easily expanded by heating.

Through the above steps, a three-dimensional image is formed on the transferred body 51.

It is also possible to form a composite stereoscopic image by combining the stereoscopic image forming methods in the respective embodiments.

[0041]

As is apparent from the above description, in the three-dimensional image forming method described in each claim of the present invention,
An arbitrary stereoscopic image can be easily formed on an arbitrary transfer target. Further, it is not necessary to consider the condition of storage and handling of the transferred material after forming the three-dimensional image, and the running cost is reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for explaining transfer of an adhesive substance in a stereoscopic image forming method according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining attachment of a thermal expansion agent according to the first embodiment.

FIG. 3 is an explanatory diagram for explaining heating of the thermal expansion agent according to the first embodiment.

FIG. 4 is an explanatory diagram illustrating transfer of an adhesive substance in a stereoscopic image forming method according to a second embodiment of the present invention.

FIG. 5 is an explanatory diagram for explaining the adhesion of the thermal expansion agent according to the second embodiment.

FIG. 6 is an explanatory diagram for explaining heating of the thermal expansion agent according to the second embodiment.

FIG. 7 is an explanatory diagram for explaining transfer of an adhesive substance in a three-dimensional image forming method according to a third embodiment of the present invention.

FIG. 8 is an explanatory diagram for explaining attachment of thermal expansion particles in the third embodiment.

FIG. 9 is an explanatory diagram for explaining heating of the thermal expansion particles according to the third embodiment.

[Explanation of symbols]

 13 Adhesive substance 17 Thermal head 21 Thermal expansion agent 25 Pressure roller 27 Light source 33 Adhesive substance 37 Laser head 41 Thermal expansion agent 45 Heating roller 47 Microwave transmitter 53 Adhesive substance 57 Inkjet head 61 Thermal expansion particle 63 Sprayer 65 Fan 67 Light source 69 microwave transmitter

Claims (3)

[Claims] 1. A step of transferring an adhesive substance containing a thermal energy conversion agent according to an image signal onto a transfer medium, and a step of attaching a thermal expansion agent which expands by heating to the adhesive substance on the transfer medium. And a step of forming a concavo-convex pattern according to an image signal by causing the thermal energy conversion agent in the adhesive substance on the transfer target to generate heat to thermally expand the thermal expansion agent. 2. A step of transferring an adhesive substance on a transfer target according to an image signal, and a step of attaching a thermal expansion agent containing a thermal energy conversion agent and expanding by heating to the adhesive substance on the transfer target. And a step of causing the thermal energy conversion agent in the thermal expansion agent to generate heat and thermally expanding the thermal expansion agent, thereby forming an uneven pattern corresponding to an image signal. 3. A step of transferring an adhesive substance containing a heat energy converting agent according to an image signal onto a transfer target, and a thermal expansion agent containing the heat energy converting agent which expands by heating on the transfer target. The step of adhering to the sticky substance, and the heat energy conversion agent contained in the heat-expandable agent and the heat-expandable agent on the transfer target is heated to expand the heat-expanding agent, thereby forming an uneven pattern corresponding to the image signal. A method for forming a three-dimensional image, which comprises the steps of: