JP4123953B2 - 3D or variable print - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a three-dimensional or variable printed material in which a printing portion is directly provided on the back surface of a lenticular lens, and more particularly to an environment-friendly three-dimensional or variable printed material in which a lenticular lens is formed on a non-vinyl chloride sheet substrate.
[0002]
[Prior art]
As disclosed in Japanese Patent Application Laid-Open No. 2000-155380, the prior art has a lens-shaped ink lined up directly on the surface of a sheet-like base material, and each ink line is caused by the action of its surface tension and gravity. An image for stereoscopic viewing or variable viewing is arranged on either surface of a manufacturing method for forming a lenticular lens by curing a deformed convex lens array and a sheet-like base material of the lenticular lens in accordance with the positional relationship. Three-dimensional or variable prints are disclosed.
As a three-dimensional printed material, a method is known in which a lenticular lens is used to alternately print right-eye and left-eye elongated images in accordance with the lens pitch, and to display a three-dimensional image using parallax. Also, as a variable printed material, different elongated images are arranged in order in one pitch of the lenticular lens, and the visible image changes depending on the viewing angle, so that it looks changed. This is also well known and will not be described in detail.
[0003]
As a material for the lenticular lens, a vinyl resin or an acrylic resin has been mainly used because of its excellent processability and moldability. However, in recent years, a vinyl resin has been avoided due to environmental problems.
Also in the said Unexamined-Japanese-Patent No. 2000-155380, transparent plastic films or sheets, such as a polyethylene terephthalate (PET), an acrylic resin, a polypropylene, polyester, are mentioned as a sheet-like base material.
However, polyethylene terephthalate (PET), polypropylene, polyester, and the like have problems such as poor moldability or unprofitability due to high cost. Then, it will have reached the invention of the above-mentioned publication considering the manufacturing method.
However, the conventional method disclosed in Japanese Patent Laid-Open No. 2000-155380 has a problem in that it is difficult to obtain an accurate lens design shape because the lens shape is controlled by the surface tension of the ink and the action of gravity.
[0004]
In addition, thermoplastic resins such as polyester, polyamide, polystyrene, and polyolefin used as sheet-like substrates are usually melted and formed into fibers, films, sheets, etc., but the surface is crystallized. In many cases, the adhesiveness of ink, adhesive, etc. is poor. In particular, in the case of a film, since it is highly crystallized by the steps of stretching and heat setting, the level of adhesion is very low. Especially in the case of a photocurable material, the adhesion to a substrate made of plastic is generally used. Since it is inferior, the adhesiveness of the lens or the printed pattern (three-dimensional or variable print image) to the sheet-like base material is weak, and there is a decisive problem of peeling due to curved bending, which has been a wall for commercialization.
[0005]
[Problems to be solved by the invention]
In order to solve the above-mentioned problems, the present invention has a good adhesion between a lenticular lens and a printed pattern and a thin plate-like substrate (sheet-like substrate), and is a three-dimensional made of a non-vinyl chloride resin that does not have a problem such as peeling due to curved bending. Alternatively, it is an object to provide a variable printed matter.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 has a printing portion including at least a three-dimensional or variable printing image on one side of a transparent thin plate-like substrate via a transparent primer portion, and the transparent thin plate-like substrate A lenticular lens is provided on the opposite surface with a radically polymerizable ionizing radiation curable resin through a transparent primer portion, and both of the transparent primer portions on both sides of the transparent thin plate-like substrate are intramolecular. The printing part including the acrylic polymer having a functional group having a photopolymerizable unsaturated group and including the image for the three-dimensional or variable printing is provided by a lithographic sheet-fed offset printing machine using ultraviolet curable ink. It is a three-dimensional or variable printed matter characterized by being printed. With such a configuration, the ink transfer to the thin plate substrate is stabilized, and the contact surface between the transparent thin plate substrate, the lenticular lens and the printed pattern is firmly bonded, resulting in bending and bending. Will not peel off.
[0007]
The invention according to claim 2 is the three-dimensional or variable printed matter according to claim 1, wherein the transparent primer portion contains a crosslinking agent.
With such a configuration, the primer base polymer is promoted to be cross-linked, the primer cohesive force is increased, and a stronger adhesive force can be obtained.
[0008]
The invention according to claim 3 is characterized in that the thickness of the transparent primer portion is 0.01 to 100 microns, and the thickness of the lenticular lens is 0.01 millimeters to 0.2 millimeters. The three-dimensional or variable printed matter according to Item 1 or Claim 2.
With such a configuration, stable and strong adhesiveness, sufficient performance as a lenticular lens, and compatibility in the manufacturing process can be obtained.
That is, there is a three-dimensional or variable printed material that is flexible and has a contact surface between a transparent thin plate-like substrate and a lenticular lens that is firmly bonded and does not peel off even when bent or bent.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view showing a cross section of a three-dimensional or variable printed material of the present invention.
1 is a transparent thin plate-like substrate, 2 is a printing portion, 3 is a transparent primer portion, and 4 is a lenticular lens. The transparent thin plate-like substrate 1 is made of, for example, an acrylic resin, a polyethylene resin such as polyethylene, polypropylene, poly-4-methylpentene-1 or polybutene-1, a polyester resin such as polyethylene terephthalate or polyethylene naphthalate, or a polycarbonate resin. Examples thereof include resins, polyphenylene sulfide resins, polyether sulfone resins, polyethylene sulfide resins, polyphenylene ether resins, styrene resins, polyamide resins, polyimide resins, and cellulose resins such as cellulose acetate. In view of environmental problems and flexibility, polyolefin resins are preferred.
[0010]
The print portion 2 is printed with an image for a conventional three-dimensional or variable print. That is, right and left eye elongated images that are matched to the pitch of the lenticular lens 4 are alternately printed, and a three-dimensional image is displayed using parallax. Further, different elongated images are arranged in order within the pitch of the lenticular lens 4, and the visible image changes depending on the viewing angle, so that it appears to change. The main body is a three-dimensional or variable printed material, but a normal image, characters, marks, etc. may be partially provided. The printed portion 2 is printed on the transparent thin plate-like substrate 1 through the transparent primer portion 3. In order to strengthen the adhesion to the primer layer, the ink is preferably an ultraviolet curable ink. White ink may be provided on the printed portion 2. The printing method is not particularly limited as long as the registration accuracy is good, but a lithographic sheet-fed offset printing machine is preferable.
[0011]
The transparent primer portion 3 is preferably one that reinforces the adhesion between the transparent thin plate-like substrate and the radical polymerizable ionizing radiation curable resin.
The transparent primer portion 3 has an acrylic polymer having a functional group having a photopolymerizable unsaturated bond and a functional group having an active hydrogen and / or an epoxy group in the molecule (hereinafter referred to as an acrylic polymer P). It is a primer containing.
The functional group having a photopolymerizable unsaturated bond introduced into the molecule of the acrylic polymer P forms a lenticular lens shape on the primer portion 3 with the radical polymerizable ionizing radiation curable resin. When it is cured by irradiation with radiation, it itself undergoes radical polymerization to form a covalent bond with a photopolymerizable unsaturated bond in the ionizing radiation curable resin provided thereon, and ionizes with the primer portion 3. It has a function of improving the adhesion with radiation-curable resin lenticular lenses. The functional group having a photopolymerizable unsaturated bond is not particularly limited as long as it has the above function, and a (meth) acryloyl group is preferable from the viewpoint of the function.
[0012]
The functional group having an active hydrogen and / or the epoxy group introduced into the molecule of the acrylic polymer P becomes a reaction point when introducing the functional group having the photopolymerizable unsaturated bond, and is transparent. It has a function of improving the adhesion between the thin plate-like substrate and the primer portion. When the acrylic polymer P and a crosslinking agent are used in combination, it also functions as a crosslinking point and can further improve the adhesion. Examples of the functional group having active hydrogen include a hydroxyl group, a thiol group, a carboxyl group, and an acid amide group.
[0013]
The amount of the functional group having a photopolymerizable unsaturated bond in the acrylic polymer P is preferably from 0.1 to 40% by weight, more preferably from the viewpoint of the reaction surface at the time of introduction and the function of the primer. Is selected in the range of 1 to 30% by weight, more preferably 2 to 20% by weight. If the amount introduced is less than 0.1% by weight, it is difficult to obtain an anchor coating agent having excellent adhesion, and the object of the present invention may not be achieved. On the other hand, if the amount exceeds 40% by weight, the primer will not tackle. This is not preferable.
[0014]
The primer used in the present invention has an acrylic polymer having a functional group having a photopolymerizable unsaturated bond and a functional group having active hydrogen and / or an epoxy group in the molecule thus obtained. The content of the functional group having the photopolymerizable unsaturated bond in the primer is preferably in the range of 0.01 to 40% by weight. When the content of the functional group deviates from the above range, a primer having a desired function is hardly obtained, and the object of the present invention may not be achieved. A more preferable content of the functional group is in the range of 1 to 30% by weight, and particularly preferably in the range of 5 to 20% by weight.
[0015]
As a crosslinking agent blended into the primer portion as desired, for example, polyisocyanate compounds, epoxy resins, melamine resins, urea resins, dialdehydes, metal salts and metal chelate compounds can be used. Compounds are preferred. Examples of polyisocyanate compounds include aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate and xylylene diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, alicyclic polyisocyanates such as isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate. And their biuret bodies, isocyanurate bodies, adduct bodies, and the like. This crosslinking agent may be used individually by 1 type, and may be used in combination of 2 or more type. Further, the amount of use is usually in the range of 0.01 to 10 parts by weight with respect to 100 parts by weight of the acrylic polymer P, although it depends on the kind of the crosslinking agent.
[0016]
The radical polymerizable ionizing radiation curable resin for forming the lenticular lens 4 is a resin that is cured by radical polymerization upon irradiation with an actinic ray such as ultraviolet rays or an ionizing radiation such as an electron beam. Among them, radical polymerizable ultraviolet rays are used. A curable resin is suitable for practical use. This radically polymerizable ionizing radiation curable resin generally comprises a photopolymerizable prepolymer as a basic component, and further contains a photopolymerizable monomer, a photopolymerizable initiator and other additives as required.
[0017]
Examples of the photopolymerizable prepolymer include polyester acrylate, epoxy acrylate, urethane acrylate, polyol acrylate, and the like. Here, as the polyester acrylate prepolymer, for example, by esterifying the hydroxyl group of a polyester oligomer having hydroxyl groups at both ends obtained by condensation of a polyvalent carboxylic acid and a polyhydric alcohol with (meth) acrylic acid. Alternatively, it can be obtained by esterifying the terminal hydroxyl group of an oligomer obtained by adding an alkylene oxide to a polyvalent carboxylic acid with (meth) acrylic acid. The epoxy acrylate prepolymer can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or novolak type epoxy resin and esterifying it. The urethane acrylate-based prepolymer can be obtained, for example, by esterifying, with (meth) acrylic acid, a polyurethane oligomer obtained by a reaction between polyether polyol or polyester polyol and polyisocyanate. Furthermore, the polyol acrylate-based prepolymer can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid. These photopolymerizable prepolymers may be used alone or in combination of two or more.
[0018]
Moreover, as a photopolymerizable monomer used as desired, for example, monofunctionality such as cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, and isobornyl (meth) acrylate. Acrylates, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, neopentyl glycol adipate di ( (Meth) acrylate, hydroxypivalate neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone-modified dicyclopentenyl di (meth) acrylate, Tylene oxide modified di (meth) acrylate, allylated cyclohexyl di (meth) acrylate, isocyanurate di (meth) acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified di Pentaerythritol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, propylene oxide modified trimethylolpropane tri (meth) acrylate, tri (acryloxyethyl) isocyanurate, propionic acid modified dipentaerythritol penta (meth) acrylate, di Examples include pentaerythritol hexa (meth) acrylate and caprolactone-modified dipentaerythritol hexa (meth) acrylate. These photopolymerizable monomers may be used singly or in combination of two or more, and the amount is usually 0 to 40 parts by weight, preferably 100 parts by weight of the photopolymerizable prepolymer, preferably It is selected in the range of 5 to 20 parts by weight.
[0019]
On the other hand, photopolymerization initiators used as desired include, for example, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy- 2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- ( Methylthio) phenyl] -2-morpholino-propan-1-one, 4- (2-hydroxyethoxy) phenyl-2 (hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, , 4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-tert-butylanthraquinone, 2-aminoanthraquinone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4 -Dimethylthioxanthone, 2, 4-diethylthioxanthone, benzyl dimethyl ketal, acetophenone dimethyl ketal, etc. are mentioned. These may be used alone or in combination of two or more, and the blending amount is usually in the range of 0.2 to 10 parts by weight with respect to 100 parts by weight of the photopolymerizable prepolymer. To be elected.
[0020]
This radical polymerizable ionizing radiation curable resin may be optionally added to various additives such as photopolymerization accelerators, polymerization inhibitors, crosslinking agents, adhesion improvers, leveling agents, thixotropic agents, coupling agents, plasticizers. An agent, an antifoaming agent, a filler, a solvent, a colorant and the like can be appropriately blended.
[0021]
The three-dimensional or variable printed material of the present invention has a coating layer obtained by applying the above-mentioned primer to at least one surface of the transparent thin plate-like substrate, and the thickness of the coating layer is usually 0.00. It is in the range of 01-100 micrometer. If the thickness is less than 0.01 micrometer, the function as a primer portion (layer) may not be sufficiently exhibited. If the thickness exceeds 100 micrometers, cohesive failure may occur and adhesion may be reduced. Considering the function and adhesion as the primer layer, the preferred film thickness of this coat layer is in the range of 0.1 to 10 micrometers, and particularly preferably in the range of 0.5 to 5 micrometers.
[0022]
Further, the thickness of the lenticular lens provided on the transparent thin plate-like substrate via the primer is usually in the range of 0.01 to 0.2 mm. If the thickness is less than 0.01, the function as a lens is insufficient. If the thickness is 0.2 mm or more, the flexibility of the product is impaired, a defect occurs in the manufacturing process, and the use of the product is narrowed.
The thickness of the transparent thin plate-like substrate is generally 10 to 2,000 micrometers, preferably 100 to 1,000 micrometers, and more preferably 150 to 600 micrometers.
[0023]
【Example】
Hereinafter, although the Example of this invention is described in detail using drawing, this invention is not limited at all by this example.
The three-dimensional or variable printed material 5 of FIG. 1 was produced by the process shown in FIG.
(Adjustment of primer and coating on thin transparent substrate)
The synthetic acrylic copolymer P is blended with the resin content of 30% by weight of the commercially available polyester resin “Toyobo Co., Ltd. Byron 20SS” so that the methacryloyl group content is 5% by weight based on the total amount of the resin. Further, 10 parts by weight of isocyanurate trimer as a crosslinking agent and a solvent were added to prepare a primer having a resin concentration of 20% by weight.
The above primer is coated on both sides of a 300 micrometer thick polypropylene sheet (Fig. 2 (a)) with corona discharge treatment on the surface so that the thickness after drying is 1 micrometer. A transparent substrate was obtained. (Fig. 2 (b))
[0024]
(Lenticular lens molding)
A lenticular lens was molded on a thin transparent substrate having a primer coated on both sides by a molding machine having a schematic configuration shown in FIG.
Reference numeral 6 denotes a plate cylinder having the shape of a lenticular lens, and FIG. A cylindrical cylinder having a rotation axis has lenticular lens-shaped concave portions arranged in the axial direction on the circumference. 7 is a winding of a transparent base material coated with a primer on both sides, 8 is a winding of a transparent base material on which a lenticular lens is formed, 9 is an ultraviolet light source, 10 is an ultraviolet curable resin tank, 11 is a nip roll, 12, 13, Reference numeral 14 denotes a guide roll.
While the take-up 7 is being fed out, an ultraviolet curable resin is supplied from the tank 10 between the plate cylinder 6 and the transparent substrate sandwiched between the plate cylinder 6 and the nip roll 11, and the ultraviolet curable resin is supplied to the plate cylinder 6 and the transparent substrate. In the meantime, ultraviolet rays were irradiated from the side opposite to the resin supply side to the transparent substrate to cure the ultraviolet curable resin, and a lenticular lens was molded and wound. (Figure 2 (c))
In this example, it is wound up, but it may be cut into sheets to be laminated.
[0025]
(Back side pattern printing)
The lenticular lens was cut to a specified size, and four-color printing and white backside processing of a three-dimensional plate-making image were performed using a UV curable ink on a normal offset sheet-fed printing press. (Fig. 2 (D))
In this way, a three-dimensional printed material of a polypropylene base was obtained.
[0026]
【The invention's effect】
According to the first aspect of the present invention, the ink transfer property of the pattern to the thin plate-like substrate is stabilized, and the contact surface between the transparent thin plate-like substrate, the lenticular lens and the printed pattern is firmly bonded to bend and bend. Will not peel off.
[0027]
The invention according to claim 2 promotes the crosslinking of the base polymer of the primer, increases the primer cohesive force, and provides a stronger adhesive force.
[0028]
The invention according to claim 3 provides stable and strong adhesiveness, sufficient performance as a lenticular lens, and compatibility in the manufacturing process.
That is, there is a three-dimensional or variable printed material that is flexible and has a contact surface between a transparent thin plate-like substrate, a lenticular lens, and a printed pattern that is firmly bonded and does not peel off even when bent or bent.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view showing an embodiment of a three-dimensional or variable printed material of the present invention.
FIGS. 2A and 2B are cross-sectional explanatory views showing steps (a), (b), (c), and (d) of the three-dimensional or variable printed material of the present invention.
FIG. 3 is a front explanatory view of a plate cylinder used for molding a lenticular lens of the present invention.
FIG. 4 is an explanatory view showing an embodiment of an apparatus used for forming the lenticular lens of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Transparent thin-plate base material 2 ... Print part 3 ... Transparent primer part 4 ... Lenticular lens 5 ... Three-dimensional or variable printed material 6 ... Plate cylinder which has the shape of a lenticular lens 7 ... The transparent base material which coated the primer on one side Winding 8: Winding of a transparent base material on which a lenticular lens is formed 9 ... UV source 10 ... UV curable resin tank 11 ... Nip roll 12, 13, 14 ... Guide roll

Claims (3)

A transparent primer is provided on one side of a transparent thin plate-like substrate with a printing portion containing at least a three-dimensional or variable printing image via a transparent primer portion, and on the opposite surface of the transparent thin plate-like substrate. A lenticular lens is provided by a radically polymerizable ionizing radiation curable resin through a portion, and both transparent primer portions on both sides of the transparent thin plate-like substrate have a photopolymerizable unsaturated group in the molecule. A printing part containing an acrylic polymer having a functional group and containing the three-dimensional or variable printing image is provided by a lithographic sheet-fed offset printing machine using ultraviolet curable ink. Variable print. The three-dimensional or variable printed material according to claim 1, wherein the transparent primer portion contains a crosslinking agent. The three-dimensional object according to claim 1 or 2, wherein the transparent primer portion has a thickness of 0.01 to 100 microns, and the lenticular lens has a thickness of 0.01 to 0.2 millimeters. Or variable prints.

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