JPH1128855A - Three-dimensional image forming body and method for forming three-dimensional image using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional image forming body having a fine three-dimensional gradation and adhesive function. SOLUTION: The three-dimensional image forming body comprises a support having one side provided with a three-dimensional image forming layer containing at least one kind of foamable capsules and a liquid absorbing composition and the opposite side provided with an adhesive layer. A three-dimensional image is formed by supplying a liquid material containing a plasticizer onto the three-dimensional image forming layer and then thermally foaming the capsules.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional image forming body and a three-dimensional image forming method using the same, and more particularly to a three-dimensional image forming body having three-dimensional gradation and adhesive function and a three-dimensional image forming method using the same. It is about.

[0002]

2. Description of the Related Art Conventionally, as a method of forming a three-dimensional image, a method of eroding an image forming layer using a treatment liquid by etching or the like, a method of pressing using a matrix, and a method of mechanically shaving an image forming layer. Various methods have been proposed, such as a method of forming a three-dimensional image by using the method. All of these methods have problems such as a long time required for forming a three-dimensional image and a skill in handling a three-dimensional image forming apparatus.

On the other hand, there has been proposed a method in which heat is supplied to a three-dimensional image forming body provided with a three-dimensional image forming layer containing unfoamed expandable capsules on a support to heat and expand the three-dimensional image forming body. Since a three-dimensional image can be formed, various three-dimensional image forming methods using an unfoamed expandable capsule have been proposed.

Japanese Patent Application Laid-Open No. 55-28855 discloses a method of forming a foam by applying or printing a foam-suppressing ink for dissolving the shell wall of the capsule onto a three-dimensional image forming layer containing an unfoamed foam capsule. There has been proposed a method of forming a three-dimensional image by breaking a capsule and then heating to expand only the unbroken foamable capsule. In this method, since the foamable capsule component dissolved by the foaming suppression ink acts as a surrounding binder after the ink is dried, foaming of the unfoamed foamable capsule adjacent thereto is inhibited, and the image is thinned. I will.

Japanese Patent Application Laid-Open No. 63-48629 proposes a method of forming a three-dimensional image by applying heat with a thermal head to an arbitrary portion of a three-dimensional image forming layer including an unfoamed expandable capsule. .

In this method, since the thermal head is always in contact with the three-dimensional image forming layer, foaming in the height direction may be suppressed, or the foamed portion may be cut off by the thermal head and detached from the support. .

[0007] Japanese Patent Application Laid-Open No. 1-253789 discloses a method in which a three-dimensional image forming layer containing an unfoamed expandable capsule and an infrared light-to-heat conversion material is provided on a support, and light condensed at an arbitrary position is provided. A method of forming a three-dimensional image by irradiation has been proposed.

In this method, although it is expected that a fine stereoscopic image can be obtained, it is necessary to construct an optical system for condensing energy enough to perform heat conversion, which is not a simple method. The infrared light-to-heat conversion substance is generally a dye (eg, aniline black) or a pigment (eg, carbon black) that is strongly colored, and it is difficult to add a colorant to give an arbitrary color to a stereoscopic image. is there.

On the other hand, a three-dimensional image forming body having a three-dimensional image forming layer containing an unfoamed expandable capsule and an adhesive layer,
JP-A-59-26287 and JP-A-2-1625
No. 28 discloses this.

[0010] These can be adhered to an arbitrary place after forming a three-dimensional image. However, the image forming bodies disclosed in both of these publications have a three-dimensional image forming layer containing an unfoamed foamable capsule. It is formed at least between the adhesive layer and the sheet substrate or the thermoformable sheet, and the heat supply for foaming of the foamable capsule is performed from the sheet side, so that the foamable capsule is foamed together with the sheet. It must be heated, and although the resulting stereo image is protected by the sheet, it requires more energy to transfer heat to the effervescent capsule. Further, for example, even if an attempt is made to obtain a fine stereoscopic image having a width of less than 1 mm, heat cannot be obtained because the heat is diffused by the sheet.

[0011]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a three-dimensional image forming body having three-dimensional gradation and adhesive function, and a method of forming a three-dimensional image using the same. Especially,
By using the three-dimensional image forming body of the present invention, a fine three-dimensional image can be formed.

[0012]

The object of the present invention is solved by the following means. That is, on one surface of the support, there is provided a three-dimensional image forming layer containing at least one kind of unfoamed expandable capsule and a liquid-absorbing composition. After supplying a liquid containing the plasticizer of the shell wall resin of the unfoamed foamable capsule to the three-dimensional image forming body having the adhesive layer on the support and the three-dimensional image forming layer of the three-dimensional image forming body, heating is performed. The problem is solved by a method of forming a stereoscopic image to be foamed.

[0013] The foamable capsule is foamed by heating,
Since the liquid material containing the supplied plasticizer is held by at least the liquid-absorbing composition and the plasticizer penetrates the water-soluble binder and the shell wall resin of the expandable capsule to promote the expansion of the expandable capsule, Even when heat is supplied to the three-dimensional image forming layer to cause thermal diffusion in the layer, the plasticizer supply part preferentially foams, and a fine three-dimensional image can be formed even when heat is supplied over the entire surface or in a non-contact manner.

Therefore, if a three-dimensional image of an arbitrary shape is formed by heat before or after cutting into an appropriate shape as desired, a three-dimensional image can be formed at a desired portion by sticking to an arbitrary portion by an adhesive function. .

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The three-dimensional image forming body according to the present invention has a three-dimensional image forming layer containing at least one unfoamed expandable capsule and a liquid absorbing composition on one surface of a support. And a pressure-sensitive adhesive layer on the support opposite to the three-dimensional image forming layer. In addition, the method of forming a three-dimensional image according to the present invention is a method of forming a three-dimensional image in which a liquid material containing a plasticizer is supplied onto the three-dimensional image forming layer of the three-dimensional image forming body and then heated and foamed. .

The foamable capsule to be contained in the three-dimensional image forming layer according to the present invention is a material in which a substance which itself is gasified or generates gas by heating is encapsulated in a shell wall of a thermoplastic resin. The thermoplastic resin used for the shell wall of the expandable capsule is a thermoplastic resin that expands and deforms without rupture of the thermoplastic resin itself as the inclusion expands by heating, and includes polyvinylidene chloride, polyacrylonitrile, and vinylidene chloride. Acrylonitrile copolymer, vinyl chloride-vinyl acetate copolymer, acrylic resin, vinyl acetate
Examples include a methacrylic acid ester copolymer and a thermoplastic resin mainly containing an aromatic vinyl compound such as styrene.

Examples of the substance which is gasified or generates gas by heat contained in the foamable capsule include low-boiling hydrocarbons such as n-butane, isobutane, n-pentane, isopentane and neopentane. Can be These are used alone or in combination with each other or with other low-boiling substances.

These inclusions are usually stored (60) in combination with the partition wall resin, that is, in the case of foaming capsules.
C)), foaming does not substantially occur for a long time, and the temperature exceeds that, preferably 80 to 200 ° C, more preferably 100 ° C.
It is preferable to adjust the type of inclusion (boiling point) and the amount of inclusion, the type of partition resin (hardness), and the thickness of the partition so as to foam in a short time (about several seconds) when heated at 160 ° C.

Commercial products of such effervescent capsules include Matsumoto Microsphere F-30 and F-5.
0, the same F-80 (made by Matsumoto Yushi), Expancel W
U-642, WU-551, UU-461 (all manufactured by Nippon Ferrite) and the like.

The three-dimensional image forming layer according to the present invention contains a liquid absorbing composition in addition to the unfoamed foamable capsule. Examples of the liquid-absorbing composition according to the present invention include a water-absorbing resin and a porous pigment. In particular, if a water-absorbing resin is used as the liquid-absorbing composition, a three-dimensional image forming layer can be formed by itself together with the unfoamed foamable capsule according to the present invention.

Specific examples of the water-absorbing resin used in the present invention include starch and modified products thereof, gelatin and modified products thereof, casein, pullulan, gum arabic, gum karaya,
Natural polymer resins such as albumin or derivatives thereof,
Fully or partially saponified polyvinyl alcohol,
Polyvinyl alcohol modified products such as cation modified and silanol modified, polyacrylamide, polyvinylpyrrolidone, polyethyleneimine, polypropylene glycol,
Water-soluble binders such as polyethylene glycol, maleic anhydride or a copolymer thereof can be used.

These water-absorbing resins are preferably capable of absorbing 30 parts by weight or more of water with respect to 100 parts by weight of their own weight, and more preferably those capable of absorbing 100 parts by weight or more of water. In addition, a single type may be used, or two or more types may be used in combination.

In order to increase the water absorbency of the water absorbent resin used in the present invention, acrylamide, methacrylamide, N, N-dimethylacrylamide, N-isopropylacrylamide, acryloylmorpholine, diacetone acrylamide, N-methylolacrylamide ,
N-vinylpyrrolidone and 2-methoxyethyl acrylate may be contained as constituents, or a resin composed of one or more of these constituents may be used in combination with the water-absorbing resin.

The content of these water-absorbing resins is preferably in the range of 2 to 300% by weight based on the foamable capsule.
In particular, the content is preferably in the range of 10 to 200% by weight. If the amount of the water-absorbent resin is small, the strength as the three-dimensional image forming layer and sufficient liquid absorbing ability cannot be obtained, and if the amount of the water-absorbent resin is too large, the number of foamable capsules decreases and the sufficient three-dimensional image Can not be obtained.

The porous pigment used in the three-dimensional image forming layer according to the present invention includes clay, talc, diatomaceous earth, calcium carbonate, calcium sulfate, magnesium carbonate, magnesium sulfate, barium sulfate, titanium oxide, zinc oxide, Examples include zinc sulfide, zinc carbonate, aluminum silicate, silicon oxide (silica), calcium silicate, aluminum oxide (alumina), aluminum hydroxide silicate, aluminum hydroxide, and natural and synthetic zeolites. Among them, calcium carbonate, magnesium carbonate, barium sulfate, titanium oxide, silicon oxide (silica), and aluminum oxide (alumina) are particularly preferable in terms of whiteness, dispersibility, and stability. These may be used alone or in combination of two or more.

The amount of the porous pigment in the three-dimensional image forming layer is 2 to 100% by weight based on the unfoamed foamable capsule.
And more preferably 5 to 50% by weight. If the amount of the porous pigment is small, sufficient liquid absorbing ability cannot be obtained, and if the amount of the porous pigment is too large, the three-dimensional image forming layer becomes unfavorable.

As the liquid-absorbing composition, either a water-absorbing resin or a porous pigment may be used, or both may be used in combination. When only a porous pigment is used, a practical film strength cannot be obtained, so that a binder is preferably used in combination.

It is preferable to use a binder together with the foamable capsule and the liquid absorbing composition in order to increase the strength of the three-dimensional image forming layer. Examples of the binder used in the present invention include a water-soluble binder, a latex-based (water-dispersed) binder, and a binder soluble in an organic solvent that is miscible with water at an arbitrary ratio.

As examples of the binder, the above-mentioned water-absorbing resin can also be used, but alginates, pectin,
Water-soluble binders such as guar gum, dextran, glue, collagen, methylcellulose, ethylcellulose, carboxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, dextrin, polyvinylmethylether, polyvinylethylether, poly (meth) acrylate, polyethylene oxide, polyvinylbutyral , Styrene-butadiene latex, acrylonitrile-butadiene latex,
Latexes and emulsions of (meth) acrylate-butadiene copolymer, styrene- (meth) acrylate copolymer, ethylene-vinyl acetate copolymer, and the like are included.

The total amount of these binders is preferably in the range of 2% by weight to 300% by weight, particularly 10% by weight to 200% by weight, based on the unfoamed expandable capsule.
It is preferably in the range of not more than% by weight. If the amount of the binder is small, the adhesive strength of the expandable capsule to the support becomes weak, and if the amount of the binder is too large, the amount of the expandable capsule becomes relatively small, and a sufficient stereoscopic image cannot be obtained. . In addition, as described above, since the water-absorbing resin also acts as a binder, even when the three-dimensional image forming layer contains the water-absorbing resin, the total amount of the water-absorbing resin and other binders falls within the range described above. Preferably, there is.

The three-dimensional image forming layer according to the present invention can be obtained by applying a coating solution obtained by dissolving or dispersing the components of the three-dimensional image forming layer in a solvent containing water as a main component to a support and drying the coating solution. A surfactant may be added to this coating liquid for the purpose of improving the coating property or adjusting the surface wettability when a plasticizer is attached. The surfactant is preferably a nonionic surfactant, but may be selected from anionic, cationic, nonionic, and betaine types as necessary, and may be a low-molecular or high-molecular surfactant. good. The amount of the surfactant added is 0.001 to 0.003 to the total solid components of the three-dimensional image forming layer.
It is preferably 5% by weight, more preferably 0.01 to 3% by weight.

Further, the coating solution for forming a three-dimensional image forming layer includes:
In addition to the above components, inorganic pigments, coloring dyes, coloring pigments, fixing agents for ink dyes, ultraviolet absorbers, antioxidants, pigment dispersants, defoamers, leveling agents, preservatives, fluorescent brighteners, viscosity stabilization Agents and various known additives such as a pH adjuster can also be added. Incidentally, the three-dimensional image forming layer according to the present invention does not necessarily need to be composed of one layer, and when the three-dimensional image forming layer is composed of two or more layers, its constituent components, the solid content concentration of the coating liquid, and the coating liquid preparation method. The amount, application amount, application method and the like may be different.

The coating method of the coating solution for forming a three-dimensional image forming layer includes a slide hopper method, a curtain method, an extrusion method, an air knife method, a spray coating method, a bar coating method, a blade coating method, a roll coating method, and a rod bar. A commonly used coating method such as a coating method can be used. When the three-dimensional image forming layer is composed of two or more layers, different coating methods may be adopted.

As a means for drying after the application of the coating solution, a drying method using a heat source by infrared rays, microwaves, or high frequency can be used in addition to hot air drying. The drying temperature of the coating solution for forming a three-dimensional image forming layer of the present invention is not only adversely affecting the support and the like when the temperature is high, but also increases the possibility of unfoamed foamable capsules being foamed. The upper surface temperature is preferably in the range of 20 to 100C, more preferably in the range of 30 to 80C.

Examples of the support according to the present invention include resin films such as polyester film, polyolefin film and polyvinyl chloride, paper such as plain paper and coated paper, resin-coated paper, and synthetic paper. , Aluminum foil, evaporated paper, evaporated film, non-woven fabric,
There is no particular limitation as long as a three-dimensional image forming layer such as leather or ceramic can be provided. The thickness of the support is not particularly limited, but when a resin film, resin-coated paper, synthetic paper, or the like is used, the thickness is preferably about 50 to 300 μm from the viewpoint of handling properties.

When paper is used as the support according to the present invention, general-purpose paper can be used. As the pulp constituting the paper, a natural pulp, a recycled pulp, a synthetic pulp, or the like may be used alone or as a mixture of two or more. This paper is blended with additives generally used in papermaking, such as a sizing agent, a paper strength enhancer, a filler, an antistatic agent, a fluorescent whitening agent, and a dye. Further, a surface sizing agent, a surface strengthening agent, a fluorescent whitening agent, an antistatic agent, a dye, an anchoring agent and the like may be coated on the surface.

The paper used as the support is preferably a paper having good surface smoothness which is compressed by applying pressure with a calender or the like during or after papermaking or after providing a coat layer on the surface. It is particularly preferable that the Beck's smoothness measured in 8119 is 200 seconds or more. Further, the basis weight is preferably from 30 to 300 g / m ² .

When using coated paper as the support, general coated paper can be used. The material used for the coated layer of the coated paper is not particularly limited as long as it is a generally used material, and diatomaceous earth, talc, kaolin, calcined kaolin, calcium carbonate, magnesium carbonate, titanium oxide, zinc oxide, Pigments such as silicon oxide, aluminum oxide, aluminum hydroxide, and urea-formalin resin; water-soluble binders such as starch and polyvinyl alcohol; latexes; surfactants; ultraviolet absorbers; fluorescent brighteners; Used.

The whiteness of paper, including coated paper and synthetic paper, is high when the Hunter whiteness measured in accordance with JIS-P-8123 is 65% or more, and the whiteness is high and high-quality. Although a three-dimensional image formed body can be obtained, the required whiteness differs depending on the purpose, and a brown base paper using unbleached pulp as a natural pulp may be used. Alternatively, paper colored with a coloring agent such as a dye may be used.

When a resin film is used as the support, any one of a transparent film, a translucent film, and a colored film may be used.
A resin film containing inorganic pigments such as barium sulfate, titanium oxide, calcium carbonate, silicon oxide, aluminum oxide, talc, and kaolin, or a white paint applied to the surface may be used. Further, the film may be subjected to an orientation treatment by a treatment such as roll stretching, tenter stretching, and inflation stretching, and in order to impart cushioning or concealing properties, a void-containing film containing a large number of voids inside the film, or foaming. A polyester film or the like can also be used.

Specific examples of the polyester film used for the support according to the present invention include polyethylene terephthalate, polyethylene butylene terephthalate, polyethylene-2,6-naphthalate, and copolymers of these with other components. Specific examples of the film include polypropylene and polyethylene. Further, polyolefin includes low-, medium-, and high-density resins, and a mixture of these resins may be used.

The resin-coated paper used for the support according to the present invention is obtained by coating one or both sides of the paper with a resin. The base paper for the resin-coated paper is not particularly limited, and generally used paper can be used, but a smooth base paper used for a photographic support or the like is preferable. Further, as a coating resin for the resin-coated paper, a polyolefin resin is preferable, and a polyethylene resin is particularly preferable. The polyethylene resin has a density of 0.915 to 0.9.
30 g / cm ³ low density polyethylene, density 0.95
There are high-density polyethylene having a density of 0 g / cm ³ or more and medium-density polyethylene having a density intermediate between the two, and these can be used even if they are mixed. In addition, these polyethylene resins,
Those having various melt flow rates can be used alone or as a mixture of two or more thereof.

The resin layer of the resin-coated paper can also be formed by applying a latex having a film forming ability. For example, it can be formed by applying a latex having a low minimum film formation temperature (MFT) to a base paper for resin-coated paper, and then heating it to a temperature equal to or higher than the minimum film formation temperature.

The configuration of the resin layer of the resin-coated paper may be a single layer or a multilayer of two or more layers. Also in this case, the above resins can be used alone or in combination of two or more. Further, the respective layers of the multilayer may have different compositions or the same composition. As a method of forming a multilayer resin layer, any of a coextrusion coating method and a sequential coating method may be adopted.
Although the thickness of the coating resin layer of the resin-coated paper is not particularly limited, it is generally coated on the surface only, or both the front and back surfaces, to a thickness of 5 to 50 μm.

In the coating resin of the resin-coated paper, white pigments such as titanium oxide, zinc oxide, talc and calcium carbonate, fatty acid amides such as stearamide and arachidic amide, zinc stearate, zinc behenate, stearic acid Lubricants such as fatty acid metal salts such as calcium phosphate and magnesium stearate, blue pigments and dyes such as cobalt blue, ultramarine, cecilian blue, phthalocyanine blue, cobalt violet, fast violet,
Various additives such as a magenta pigment or dye such as manganese purple, an antioxidant, a fluorescent brightener, and an ultraviolet absorber can be added in an appropriate combination.

The support may be provided with an anchor layer for the purpose of improving the adhesiveness between the three-dimensional image forming layer and the support. A hydrophilic binder such as gelatin, a solvent-soluble binder such as butyral, a latex, a curing agent, a pigment, a surfactant and the like can be appropriately added to the anchor layer.

The support provided with the three-dimensional image forming layer has an adhesive layer on the surface opposite to the three-dimensional image forming layer side. The same material as the pressure-sensitive adhesive layer used for a general pressure-sensitive adhesive sheet or the like can be used for the pressure-sensitive adhesive layer according to the present invention. The general pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive, a softener, a tackifier, an antioxidant, and the like.

The type of the adhesive used in the adhesive layer according to the present invention can be classified by the type of the polymer, and is mainly composed of a rubber-based adhesive mainly composed of natural rubber, an acrylic adhesive, and a polysiloxane. There are silicone-based pressure-sensitive adhesives and the like, and when classified according to the form at the application stage, there are water-based pressure-sensitive adhesives based on polyacrylate emulsions, solvent-based pressure-sensitive adhesives, hot-melt-type pressure-sensitive adhesives, and the like.

Examples of the pressure-sensitive adhesive used in the present invention include acrylate ester copolymer, styrene-acrylate ester copolymer, styrene-butadiene copolymer, ethylene-vinyl acetate copolymer, vinyl acetate-acrylic acid Ester copolymer, ethylene-vinyl chloride copolymer, ethylene-acrylate copolymer, ethylene-acrylic acid copolymer, vinyl acetate-ethylene-acryl copolymer,
Thermoplastic resin emulsions having a glass transition temperature (Tg) of 20 ° C. or less, preferably 0 ° C. or less, such as polybutadiene and polyurethane, are exemplified. These can be used alone or in combination of two or more.

Examples of hot-melt adhesives include ethylene-vinyl acetate copolymers, polyamides,
Thermoplastic polyester, styrene-butadiene block copolymer elastomer (SBS), styrene-isoprene block copolymer elastomer (SIS), styrene-
Ethylene-butylene-styrene block elastomer (SEBS) and styrene-ethylene-propylene-
Examples include thermoplastic elastomers based on block elastomers of styrene (SEPS), and polyolefins such as atactic polypropylene and low-crystalline polyolefins.

Examples of the softener used in the present invention include liquid rubbers such as polyisobutylene and polybutene, oils, and dibasic acid ester-based plasticizers for pressure-sensitive adhesives.

Examples of the tackifier include rosin,
Examples include hydrogenated rosin glycerin ester, polyterpene resin, terpene phenol resin, C5 petroleum resin, C9 petroleum resin, and alicyclic hydrogenated petroleum resin.

Examples of the anti-aging agent include 2,6-
Di-tert-butyl-4-methylphenol, 2,5-di-
Examples include t-butylhydroquinone, mercaptobenzimidazole, 1,1-bis (4-hydroxyphenyl) cyclohexane, and phenyl-β-naphthylamine.

In the pressure-sensitive adhesive layer, polyvinyl alcohol, polyvinyl acetate, starch oxide, etherified starch, carboxymethylcellulose, hydroxyethylcellulose, casein, gelatin, An aqueous polymer binder such as sodium alginate may be used.

Further, titanium oxide, alumina, kaolin,
Fillers such as talc, silica, paraffin, natural wax, and synthetic wax, combined with additives such as flame retardants, hardeners, preservatives, dyes, ultraviolet absorbers, antioxidants, pH regulators, and defoamers You may.

In general, the forms that exhibit the adhesive function include:
There are various forms such as a general pressure-sensitive adhesive sheet with a release sheet or a liner stack pressure-sensitive adhesive sheet that does not require a release sheet, such as pressure-sensitive adhesive, heat-sensitive adhesive, and water-wet adhesive. In addition, the heat-sensitive adhesive form further shows no adhesiveness at room temperature, but develops adhesiveness when heated, and has adhesiveness while being maintained at a constant temperature, but becomes adhesive as the temperature decreases. Hot melt type adhesive form, which loses adhesiveness, and delayed tack type adhesive form, which retains adhesiveness without heating afterwards. In the present invention, any form of adhesive function may be imparted as necessary.

An undercoat layer may be provided on the side of the support according to the present invention on the side on which the adhesive layer is provided, if necessary. As the undercoating layer, when the support is paper, polyvinyl alcohol or the like is used as a filler, and when the support is a film, the undercoating agent of the adhesive is mainly composed of a methyl methacrylate graft of natural rubber. Is mentioned.

The coating amount of the pressure-sensitive adhesive layer according to the present invention is preferably in the range of about 1 to 50 g / m ² by dry weight, and more preferably 5 to 50 g / m ^2.
The range is preferably about 25 g / m ² . The amount of the adhesive layer applied is 1
When the amount is less than g / m ^{2, the} adhesive strength to the adherend becomes insufficient. On the other hand, when the amount exceeds 50 g / m ² , not only does the adhesiveness not improve even if the amount is further increased, but also during bonding. The adhesive is undesirably protruding.

The method for forming the pressure-sensitive adhesive layer in the present invention comprises directly applying a coating solution containing a component of the pressure-sensitive adhesive layer to a support substrate.
A method for drying, a method for applying and drying a coating solution containing an adhesive layer component on release paper to form an adhesive layer, a method for transferring the adhesive layer by pressing it to the substrate surface, and a method for heating and melting without adding a solvent. A known method such as a method of coating the base material surface in an inclined state can be adopted. In addition, the coating solution containing the adhesive layer component is a roll coater, an air knife coater, a blade coater,
The support can be coated or printed using a coating apparatus such as a bar coater, curtain coater, slot die coater, and lip coater, or a printing machine such as flexo, letterpress, gravure, and offset.

The adhesive layer according to the present invention may be provided on the entire surface of the three-dimensional image forming body on the side opposite to the side on which the three-dimensional image forming layer is formed, or may be provided partially. In particular, when the pressure-sensitive adhesive layer is partially provided, the pressure-sensitive adhesive layer forming means (supply head) and its pattern may be a single nozzle, a multi-nozzle, a ribbon coater, a linear or band shape using a print roller, a radial nozzle, a spot wheel, or the like. Examples include a dot shape, a minute dot shape using a spray head or the like, a spiral shape using a spiral head or the like, and a composite image shape using a screen printing machine or the like. When the adhesive layer is provided partially, these may be used in combination, and the composition and thickness of the adhesive layer may not be constant depending on the portion.

The order of providing the pressure-sensitive adhesive layer and the three-dimensional image forming layer according to the present invention on the support includes a method of first providing the three-dimensional image forming layer, a method of providing the first adhesive layer, a method of providing both layers simultaneously, Any method may be used, such as a method in which an adhesive is applied to a release paper and then bonded to a support.

Next, the method of forming a three-dimensional image of the present invention will be described. The three-dimensional image forming body of the present invention can form a three-dimensional image by heating at least to a temperature at which the expandable capsule in the three-dimensional image forming layer expands,
After a liquid material containing a plasticizer is supplied onto the three-dimensional image forming layer of the three-dimensional image forming body of the present invention and then heated and foamed, a three-dimensional image having three-dimensional gradation can be formed.

In the present invention, a plasticizer is a plasticizer that penetrates into a shell wall resin of an expandable capsule and plasticizes the shell wall resin, or a plasticizer of a water-soluble binder used in the present invention, unless otherwise specified. It is.

Examples of the plasticizer for the shell wall resin include polyalkylene glycols such as polyethylene glycol and polypropylene glycol. Ethylene glycol, propylene glycol, 1,2,6-hexanetriol,
Polyhydric alcohols such as thiodiglycol, hexylene glycol, diethylene glycol and glycerin; Ethylene glycol methyl ether, diethylene glycol methyl ether, diethylene glycol ethyl ether,
Water-soluble plasticizers such as lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl ether and triethylene glycol monoethyl ether.

Phthalates such as bis (2-ethylhexyl) phthalate, diisooctyl phthalate, diisodecyl phthalate, dibutyl phthalate and the like. Dibasic acid esters such as dioctyl adipate, diisodecyl adipate, and dioctyl azelate; Glycol esters such as diethylene glycol dibenzoate and triethylene glycol bis (2-ethylhexoate). Fatty acid esters such as butyl stearate and butyl oleate. Epoxy such as butyl epoxy stearate and octyl epoxy stearate. Examples include oil-soluble plasticizers such as phosphates such as tris (2-ethylhexyl) phosphate, but the present invention is not limited thereto.

As the plasticizer for the water-soluble binder, for example, the above-mentioned water-soluble plasticizers such as polyalkylene glycols, polyhydric alcohols and lower alkyl ethers of polyhydric alcohols are preferable. Low-boiling solvents such as methyl alcohol, ethyl alcohol, and isopropyl alcohol, and water can also be used.

As described above, according to the present invention, the liquid containing the plasticizer of the shell wall resin of the expandable capsule is supplied onto the three-dimensional image forming layer, so that the plasticizer is converted into the shell wall resin of the expandable capsule. The plasticizer of the shell wall resin is plasticized.More specifically, the portion where the plasticizer of the shell wall resin is applied or printed decreases the heat softening temperature of the shell wall resin. It foams (expands) at a lower temperature than the location where the contained liquid was not supplied.

Further, by supplying a liquid material containing a plasticizer of a water-soluble binder, the three-dimensional image forming layer is softened, and the expandable capsule is easily expanded.

With the supply of the liquid material containing the plasticizer,
The expansion rate of the effervescent capsule increases. Therefore, when foaming is performed by heating, only the portion to which the liquid material is supplied can be foamed, and the expansion rate of the expandable capsule changes with the amount of the supplied plasticizer. It is possible to obtain a stereoscopic image having a characteristic.

When a high-viscosity plasticizer having a high viscosity is used, it is preferable to lower the viscosity by mixing a solvent or a low-viscosity plasticizer. The ratio of mixing the high-viscosity plasticizer with the solvent, etc., varies depending on the type of plasticizer, viscosity, and type of solvent, but when the content of the plasticizer is small, the shell resin of the expandable capsule or the water-soluble binder is plasticized. It becomes difficult to supply enough plasticizer for

The viscosity of the plasticizer mixed with a solvent or the like is 100 mPa · s in order to increase the permeability of the plasticizer into the shell wall resin of the expandable capsule and the absorption by the water-soluble binder.
Or less, preferably 30 mPa · s or less. In addition, although it depends on the type of plasticizer, even when a high-viscosity plasticizer is used, if the content of the plasticizer is generally 50% by weight or less based on the total amount of the plasticizer mixed with a solvent or the like, the viscosity is 100 mPa S or less, and if the content of the plasticizer is 25% by weight or less, the viscosity often becomes 30 mPa · s.

When a liquid containing a plasticizer of the shell wall resin of the expandable capsule is supplied, the plasticizer permeates the shell wall resin of the expandable capsule and plasticizes the shell wall resin. More specifically, the portion where the plasticizer of the shell wall resin is applied or printed foams (expands) at a lower temperature than the uncoated or unprinted portion because the heat softening temperature of the shell wall resin is lowered.

Further, by heating the expandable capsule, the substance contained in the expandable capsule tries to gasify or generate gas. When the softening temperature of the shell wall resin is high, the internal pressure in the expandable capsule once increases, but unless the heating is continued for a long time, the expandable capsule gradually expands without sufficiently expanding because the shell wall resin is hard. The shell wall resin becomes harder as it cools down and the internal pressure decreases. On the other hand, when the softening temperature of the shell wall resin is low, the foamable capsule can be sufficiently foamed in a short time because the shell wall resin is soft even with the same amount of heat. Since the expandable capsule does not return to its original shape when expanded, the apparent expansion rate of the expandable capsule increases when the softening temperature of the shell wall resin is low. In other words, by lowering the softening temperature of the shell wall resin with a plasticizer and softening the shell wall resin, the apparent expansion coefficient (hereinafter simply referred to as expansion coefficient) of the expandable capsule can be increased.

On the other hand, the plasticizer of the water-soluble binder softens the three-dimensional image forming layer, and thus facilitates expansion of the foamable capsule. In other words, since the three-dimensional image forming layer is hard in the portion where the plasticizer of the water-soluble binder is not applied, even if the internal pressure of the expandable capsule is increased by heating, the expansion of the capsule is suppressed.

As a heating method for foaming the unfoamed foamable capsule, the thermal head and light irradiation are exemplified above, but the heating method is not particularly limited, and an appropriate heat source may be used. As a heat source including the above heating means,
A heat light source such as an infrared lamp or a halogen lamp, a laser beam, a thermal head, a heat roll, a heat stamp, high-frequency heating, radiant heat from an electric heater, hot air, an iron, or the like can be used.

The heating temperature for forming a three-dimensional image in the present invention is such that the surface temperature of the three-dimensional image forming layer is from 70 ° C. to 16 ° C.
The heating is preferably performed so as to be in the range of 0 ° C., and more preferably in the range of 90 ° C. to 140 ° C.

The heating time at that time is from 2 seconds to 40 seconds.
Preferably up to seconds, more preferably from 5 seconds to 20 seconds.

The three-dimensional image forming body of the present invention can be applied to a long film to form an adhesive tape, or punched out into a predetermined shape and used for a label or the like.

[0079]

EXAMPLES The present invention will be described below in detail with reference to examples, but the contents of the present invention are not limited to the examples.
Further, the number of added parts described in the examples indicates the number of parts by weight of the active ingredient.

(Preparation of Three-Dimensional Image Forming Body) Example 1 29 parts of an acrylic ester emulsion (solid content: 40%, Teisan Resin PT-850, manufactured by Teikoku Sangyo Co., Ltd.), which is a liquid-absorbing composition, is provided with an expandable capsule ( Matsumoto Microsphere F-30, maximum expansion ratio: about 70 times, particle size: 10 to 20 μm, manufactured by Matsumoto Yushi (four parts), and two parts of porous pigment amorphous silica (Fine Seal X37, manufactured by Tokuyama) Was added to prepare a coating solution for forming a three-dimensional image forming layer.

A white polyester film (U2, 100 μm thick, manufactured by Teijin) having an increased whiteness by containing barium sulfate inside the film was used, and one surface of the white polyester film was subjected to corona treatment and then to a corona-treated surface. The coating solution for forming a three-dimensional image forming layer was applied so as to have a dry coating amount of 30 g / m ² and dried to prepare a three-dimensional image forming layer.

Next, 25 parts of an acrylate copolymer emulsion as an adhesive, 5 parts of a rosin resin as a tackifier, and 2,6-di-t-butyl-4-methylphenol as an antioxidant One part was mixed, and the coated amount after drying with a roll coater on the release surface of the release base paper was 20 g / m ^2.
And dried to form an adhesive layer.

The adhesive layer was subjected to corona treatment on the surface of the white polyester film provided with the three-dimensional image forming layer opposite to the surface provided with the three-dimensional image forming layer, and then pressed and transferred to obtain a three-dimensional image formed body. .

Further, the three-dimensional image forming body was able to be attached to the plastic sheet by peeling the release base paper and pressing it against the plastic sheet to be attached.

Comparative Example 1 A three-dimensional image formed body was prepared in the same manner as in Example 1, except that the foamable capsule was removed from the coating solution for the three-dimensional image forming layer in Example 1.

Comparative Example 2 A three-dimensional image formed body was produced in the same manner as in Example 1 except that the adhesive layer of Example 1 was not provided. Even if this three-dimensional image forming body was pressed against a plastic sheet as an object to be pasted, it could not be pasted on the plastic sheet.

(Method of Forming Stereoscopic Image) Example 2 5 parts of glycerin as a plasticizer was diluted with 92 parts of ion-exchanged water, and this was mixed with Direct Black 19 as a water-soluble dye.
9 was added and mixed well to prepare a liquid material A containing a plasticizer, and the liquid material A was added to the three-dimensional image forming body obtained in Example 1 at 1, 4, 8, 16 g / m2. ² was applied.

By peeling the release base paper from the three-dimensional image forming body and pressing it against a plastic sheet as an object to be pasted, it was possible to adhere to the plastic sheet.

Next, the three-dimensional image forming layer was heated at 120 ° C. for 5 seconds while being attached to the plastic sheet.

As a result, the portion of the image forming layer to which the liquid material A was supplied was foamed to form a three-dimensional image.
The portion not supplied with was not foamed at all, despite the same heating. In addition, as the supply amount of the liquid material A increases, the coloring density of the three-dimensional image forming body increases, and the three-dimensional image forming layer containing the expandable capsule also expands, and the three-dimensional gradation is adjusted according to the gradation of the color tone. Could be obtained.

Comparative Example 3 The procedure of Example 1 was repeated, except that the three-dimensional image-formed recording medium of Example 2 was prepared in Comparative Example 1, but no foam was formed.

Example 3 7 parts of glycerin as a plasticizer was diluted with 73.5 parts of ion-exchanged water, and 4 parts of Acid Red 23 as a water-soluble dye was added and mixed well. Further, 7 parts of thiodiglycol, 7 parts of urea and 1.5 parts of acetylene glycol were added to this liquid to prepare a liquid B containing a plasticizer having a surface tension of about 40 dyne / cm.

This liquid B was put into an ink cartridge of a commercially available ink jet printer (BJC600J, manufactured by Canon), and the three-dimensional image formed body prepared in Example 1 was 360 dp using this ink jet printer.
about 0.2 mm, about 0.5 mm, and about 1 m at i resolution
m was printed, followed by heating at 120 ° C. for 5 seconds.

As a result, the portion of the three-dimensional image forming body to which the liquid material B was supplied could form a fine three-dimensional image by foaming according to the printed line width, but the portion to which the liquid material B was not supplied was However, despite the similar heating, no foaming occurred.

As in the case of Example 1, the three-dimensional image forming body could be pressed against a plastic sheet as an object to be peeled off and peeled from the release base paper, or could be pasted on the plastic sheet.

[0096]

As is clear from the examples, a three-dimensional image could be formed by using the three-dimensional image forming body of the present invention. Further, in the three-dimensional image forming body of the present invention and the method of forming a three-dimensional image using the same, only a portion to which a liquid material containing a plasticizer is supplied forms a three-dimensional image, so that a fine three-dimensional image can be formed. did it. Further, since the three-dimensional image forming body of the present invention has an adhesive layer, it can be attached to an arbitrary position, and a three-dimensional image can be formed on a desired base material or the like.

Claims (2)

[Claims] 1. A solid image forming layer containing at least one unfoamed expandable capsule and a liquid-absorbing composition on one surface of a support, wherein the solid image forming layer side A three-dimensional image forming body having an adhesive layer on an opposite support. 2. A method for forming a three-dimensional image, comprising: supplying a liquid material containing a plasticizer onto the three-dimensional image forming layer of the three-dimensional image forming body according to claim 1, followed by heating and foaming.