JP2003262929A - Stereoscopic or variable printed matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide stereoscopic or variable printed matter made of a non- polyvinyl chloride resin which provides good adhesiveness between lenticular lenses and a thin sheet base material and is free from problems like peeling by curving and bending. <P>SOLUTION: The stereoscopic or variable printed matter has printed segments including at least images for three-dimensional or variable printing through a transparent primer part on one surface of the transparent thin sheet base material and is provided with the lenticular lenses by a radical polymerizable ionization radiation-curing resin through the transparent primer segments on the opposite side of the thin sheet base material. The primer parts include an acrylic polymer which has a functional group possessing a photopolymerizable unsaturated bond within the molecule and has a functional group and/or epoxy group pocessing active hydrogen. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional or variable printed matter in which a printed portion is directly provided on the back surface of a lenticular lens, and more particularly to an environmentally friendly three-dimensional or variable printed matter in which a lenticular lens is formed on a non-vinyl chloride sheet base material. It is a thing.

[0002]

2. Description of the Related Art The prior art is disclosed in JP-A-2000-15538.
As disclosed in Japanese Patent Publication No. 0,058, the lens-forming ink is arranged directly in the form of convex stripes on the surface of the sheet-like base material, and each of the ink rows is cured by the action of surface tension and gravity to cure the convex lens-like rows. Disclosed is a manufacturing method for forming a lenticular lens and a stereoscopic or variable printed material in which an image for stereoscopic vision or variable vision is arranged in alignment with any one of the surfaces of the sheet-shaped substrate of the lenticular lens. There is. As a three-dimensional printed matter, a method is known in which a lenticular lens is used to alternately print long and narrow images for the right eye and for the left eye in accordance with the pitch of the lenses, and a parallax is used to make the image look three-dimensional. Also, as a variable printed matter, different elongated images are arranged in order within one pitch of the lenticular lens, and the image that appears varies depending on the viewing angle. This is also well known and will not be described in detail.

As a material for the lenticular lens, a vinyl chloride resin or an acrylic resin has been mainly used because of its excellent workability and moldability, but recently, vinyl chloride resin has been shunned due to environmental problems and the like. . JP 2000-15
Also in JP 5380, a transparent plastic film or sheet made of polyethylene terephthalate (PET), acrylic resin, polypropylene, polyester or the like is mentioned as a sheet-shaped substrate. However, polyethylene terephthalate (PET), polypropylene, polyester and the like have problems that they are unprofitable due to poor moldability or high cost. Therefore, the invention of the above publication considering the manufacturing method may have been reached. However, the conventional method disclosed in Japanese Patent Laid-Open No. 2000-155380 has a problem that it is difficult to obtain an accurate lens design shape because control of the lens shape depends on the surface tension of ink and the action of gravity.

The thermoplastic resin such as polyester, polyamide, polystyrene and polyolefin used as a sheet-like substrate is usually melted to form fibers, films, sheets and the like, but the surface thereof is crystallized. In many cases, the adhesiveness of ink, adhesive, etc. is poor.
Among them, in the case of a film, by the steps of stretching and heat setting,
Due to the high degree of crystal orientation, the level of adhesion is very low, especially in the case of photocurable materials, the adhesion to plastic substrates is generally poor, so lenses or printed patterns (three-dimensional or variable printed images) The adhesiveness to the sheet-shaped substrate was weak, and there was a definite problem of peeling due to bending and bending, which was a barrier to commercialization.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has good adhesiveness between a lenticular lens and a printed pattern and a thin plate-shaped base material (sheet-shaped base material), and can prevent peeling due to bending and bending. An object of the present invention is to provide a three-dimensional or variable printed matter made of non-vinyl chloride resin that does not have any problem.

[0006]

According to a first aspect of the present invention, a transparent thin plate-shaped substrate has a printing portion on one surface thereof, which includes at least an image for three-dimensional or variable printing via a transparent primer portion. The three-dimensional or variable printed matter is characterized in that a lenticular lens is provided on the opposite surface of the transparent thin plate-like substrate with a radical-polymerizable ionizing radiation curable resin via a transparent primer portion. With such a structure, the ink transfer property to the thin plate-shaped substrate of the pattern is stabilized, and the contact surface of the transparent thin plate-shaped substrate and the lenticular lens is firmly adhered, and it may be peeled off even when bending or bending. Disappear.

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 structure, crosslinking of the base polymer of the primer is promoted, the primer cohesive force is increased, and a stronger adhesive force is obtained.

According to a third aspect of the present invention, the transparent primer portion has a thickness of 0.01 to 100 μm, and the lenticular lens has a thickness of 0.01 mm to 0.2 mm. The three-dimensional or variable printed matter according to claim 1 or 2. With such a structure, stable and strong adhesiveness, sufficient performance as a lenticular lens, and suitability in the manufacturing process can be obtained. That is, a three-dimensional or variable printed matter which is flexible and has a transparent thin plate-like base material and a contact surface of a lenticular lens firmly adhered to each other and which is not peeled off even when curved or bent is obtained.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory view showing a cross section of a three-dimensional or variable printed matter of the present invention. Reference numeral 1 is a transparent thin plate-shaped substrate, 2 is a printed portion, 3 is a transparent primer portion, and 4 is a lenticular lens. The transparent thin plate-shaped substrate 1 is, for example, acrylic resin, polyethylene, polypropylene, poly 4
-Polyolefin resins such as methylpentene-1 and polybutene-1, polyester resins such as polyethylene terephthalate and polyethylene naphthalate, polycarbonate resins, polyphenylene sulfide resins,
Examples thereof include polyether sulfone resin, polyethylene sulfide resin, polyphenylene ether resin, styrene resin, polyamide resin, polyimide resin, and cellulose resin such as cellulose acetate. A polyolefin resin is preferable in consideration of environmental problems and flexibility.

An image for a conventional three-dimensional or variable printed matter is printed on the printing portion 2. That is, the elongated images for the right eye and the images for the left eye, which match the pitch of the lenticular lens 4, are alternately printed, and the parallax is used to make the image look solid. In addition, different elongated images are arranged in order in the pitch of the lenticular lens 4, and the image to be viewed changes depending on the viewing angle, and thus the image appears to change. The main body is a three-dimensional or variable printed matter, but normal images, characters, marks, etc. may be partially provided. The printed portion 2 is printed on the transparent thin plate-shaped substrate 1 through the transparent primer portion 3. In order to strengthen the adhesiveness with 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.

The transparent primer portion 3 is preferably one that enhances the adhesion between the transparent thin plate-shaped 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 active hydrogen and / or an epoxy group in the molecule (hereinafter referred to as an acrylic polymer P). It is a primer containing. The acrylic polymer P
The functional group having a photopolymerizable unsaturated bond that is introduced into the molecule of is formed into a lenticular lens shape with the radical polymerizable ionizing radiation curable resin on the primer portion 3 and cured by irradiation with ionizing radiation. When it is allowed to do so, it itself undergoes radical polymerization to form a photopolymerizable unsaturated bond and a covalent bond in the ionizing radiation curable resin provided thereon, and the primer portion 3 and the lenticular of the ionizing radiation curable resin are lenticular. It has the function of improving the adhesion to the lens. The functional group having a photopolymerizable unsaturated bond is not particularly limited as long as it has the above-mentioned function, but a (meth) acryloyl group is preferable from the viewpoint of the function.

The functional group having 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 a photopolymerizable unsaturated bond. At the same time, it has a function of improving the adhesion between the transparent thin plate-shaped substrate and the primer portion. When the acrylic polymer P and the cross-linking agent are used in combination, it also functions as a cross-linking point and the adhesiveness can be further improved.
Examples of the functional group having active hydrogen include a hydroxyl group, a thiol group, a carboxyl group, and an acid amide group.

The amount of the functional group having a photopolymerizable unsaturated bond to be introduced into the acrylic polymer P is preferably 0.1 to 40% by weight from the viewpoint of the reaction surface at the time of introduction and the function of the primer. , More preferably 1 to 30% by weight,
More preferably, it is selected in the range of 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 it exceeds 40% by weight,
The primer causes tack and is not preferred.

The primer used in the present invention has a functional group having a photopolymerizable unsaturated bond and a functional group having an active hydrogen and / or an epoxy group in the molecule thus obtained. Although it contains the acrylic polymer P, the content of the functional group having a 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, it may be difficult to obtain a primer having a desired function, and the object of the present invention may not be achieved. The more preferable content of the functional group is in the range of 1 to 30% by weight, and particularly 5 to 20%.
A weight% range is preferred.

As the cross-linking agent optionally blended in the primer portion, for example, a polyisocyanate compound, an epoxy resin, a melamine resin, a urea resin, a dialdehyde, a metal salt or a metal chelate compound can be used. A polyisocyanate compound is particularly preferable. Examples of polyisocyanate compounds include tolylene diisocyanate, diphenylmethane diisocyanate, aromatic polyisocyanates such as xylylene diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, alicyclic polyisocyanates such as hydrogenated diphenylmethane diisocyanate. Etc., and their biuret form, isocyanurate form, adduct form, and the like. This crosslinking agent may be used alone or in combination of two or more. The amount of its use depends on the kind of the cross-linking agent, but 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.

The radical-polymerizing ionizing radiation-curable resin for forming the lenticular lens 4 is a resin which is cured by radical polymerization upon irradiation with actinic rays such as ultraviolet rays and ionizing radiation such as electron beams. A UV curable resin having good properties is suitable for practical use.
This radical-polymerizable ionizing radiation-curable resin generally contains a photopolymerizable prepolymer as a basic component and, if desired, further contains a photopolymerizable monomer, a photopolymerizable initiator, and other additives.

Examples of the photopolymerizable prepolymer include polyester acrylate type, epoxy acrylate type,
Examples thereof include urethane acrylate type and polyol acrylate type. Here, as the polyester acrylate prepolymer, for example, by esterifying hydroxy of a polyester oligomer having hydroxyl groups at both ends obtained by condensation of polyvalent carboxylic acid and 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 polycarboxylic acid with (meth) acrylic acid. The epoxy acrylate prepolymer can be obtained, for example, by reacting (meth) acrylic acid with the oxirane ring of a bisphenol type epoxy resin or novolac type epoxy resin having a relatively low molecular weight to esterify. The urethane acrylate prepolymer can be obtained, for example, by esterifying a polyurethane oligomer obtained by reacting a polyether polyol or polyester polyol with a polyisocyanate with (meth) acrylic acid. Furthermore, the polyol acrylate prepolymer can be obtained by esterifying the hydroxyl groups of the polyether polyol with (meth) acrylic acid.
These photopolymerizable prepolymers may be used alone,
You may use it in combination of 2 or more type.

Examples of the photopolymerizable monomer optionally used include cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate and isobornyl (meth) acrylate. Monofunctional 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, hydroxypivalic acid neopentyl glycol di (meth) ) Acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified phosphoric acid di (meth) acrylate, allylated cyclohexyl di (meth) acrylate, isocyanurate di (meth)
Acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, propylene oxide modified trimethylolpropane tri (meth) acrylate Examples thereof include acrylate, tri (acryloxyethyl) isocyanurate, propionic acid-modified dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and caprolactone-modified dipentaerythritol hexa (meth) acrylate. These photopolymerizable monomers may be used alone or in combination of two or more, and the compounding amount thereof is usually 0 to 40 parts by weight, preferably 100 parts by weight of the photopolymerizable prepolymer. It is selected in the range of 5 to 20 parts by weight.

On the other hand, as the photopolymerization initiator optionally used, 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-hydroxycyclohexylphenylketone, 2-methyl-1- [ 4- (Methylthio) phenyl] -2-morpholino-propane-1-
On, 4- (2-hydroxyethoxy) phenyl-2
(Hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-
Methyl anthraquinone, 2-ethyl anthraquinone, 2
-Tert-butylanthraquinone, 2-aminoanthraquinone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyldimethylketal, acetophenonedimethylketal, and the like. To be These may be used alone or in combination of two or more, and the compounding amount thereof 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.

If desired, various additives such as a photopolymerization accelerator, and the like may be added to the radically polymerizable ionizing radiation curable resin.
A polymerization inhibitor, a cross-linking agent, an adhesion improver, a leveling agent, a thixotropic agent, a coupling agent, a plasticizer, an antifoaming agent, a filler, a solvent, a colorant and the like can be appropriately added.

The three-dimensional or variable printed matter of the present invention has a coat layer obtained by applying the above-mentioned primer on at least one surface of the transparent thin plate-like substrate, and the thickness of the coat layer is It is usually in the range of 0.01 to 100 micrometers. If the thickness is less than 0.01 micrometer, the function as a primer portion (layer) may not be sufficiently exhibited, and if it exceeds 100 micrometer, cohesive failure may occur and the adhesion may be deteriorated. Considering the function as a primer layer and the adhesiveness, the preferable film thickness of this coat layer is in the range of 0.1 to 10 μm, particularly 0.5 to 5 μm.

The thickness of the lenticular lens provided on the transparent thin plate-like base material 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, and if it is 0.2 mm or more, the flexibility of the product is impaired, a defect occurs in the manufacturing process, and the application of the product becomes narrow. The thickness of the transparent thin plate-like substrate is generally 10
~ 2,000 micrometer, preferably 10
0-1,000 micrometer, more preferably 15
It is selected in the range of 0 to 600 micrometer.

[0023]

Embodiments of the present invention will now be described in detail with reference to the drawings, but the present invention is not limited to these embodiments. The three-dimensional or variable printed matter 5 of FIG. 1 was produced in the process shown in FIG. (Preparation of primer and coating on thin plate transparent substrate) Commercially available polyester resin "Byron 20S manufactured by Toyobo Co., Ltd."
To the resin concentration of "S" is 30% by weight, the synthesized acrylic copolymer P is blended so that the content of methacryloyl group is 5% by weight based on the total amount of the resin, and isocyanurate trimer as a crosslinking agent. Was added together with a solvent to prepare a primer having a resin content of 20% by weight. The above-mentioned primer was coated on both sides of a polypropylene sheet having a thickness of 300 μm (FIG. 2 (a)) whose surface was subjected to corona discharge treatment so that the thickness after drying would be 1 μm. A transparent substrate was obtained. (Figure 2 (b))

(Molding of Lenticular Lens) A lenticular lens was molded on a thin plate-shaped transparent substrate whose both surfaces were coated with a primer by a molding machine having a schematic structure shown in FIG. Reference numeral 6 is a plate cylinder having the shape of a lenticular lens, and FIG. A cylindrical cylinder having a rotation axis, on the front side of which concave portions in the shape of a lenticular lens are arranged on the circumference in the axial direction. 7 is the winding of a transparent base material coated with a primer on both sides, 8 is the winding of a transparent base material having a lenticular lens formed thereon, 9 is an ultraviolet source, 10 is an ultraviolet curable resin tank, 11 is a nip roll, 12, 13, 14 is a guide roll. While unwinding the winding 7, the tank 10 is filled with the ultraviolet curable resin between the transparent base material sandwiched between the plate cylinder 6 and the nip roll 11 and the plate cylinder 6.
While the ultraviolet curable resin is supplied between the plate cylinder 6 and the transparent base material, the ultraviolet curable resin is irradiated with ultraviolet rays from the side opposite to the resin supply side to the transparent base material to cure the ultraviolet curable resin. A lenticular lens was molded and wound up. (FIG. 2C) In this example, the material is wound, but may be cut into sheets and laminated.

(Backside pattern printing) The lenticular lens was cut to a predetermined size, and a three-dimensional plate-making image was subjected to four-color printing and white backside processing using a UV curable ink in an ordinary offset sheet-fed printing machine. . (FIG. 2D) A polypropylene-based three-dimensional printed material was thus obtained.

[0026]

According to the invention described in claim 1, the ink transfer property of the pattern to the thin plate-like base material is stabilized, and the contact surface between the transparent thin plate-like base material, the lenticular lens and the printed pattern is firmly adhered. Therefore, it will not be peeled off due to bending or bending.

According to the second aspect of the present invention, crosslinking of the base polymer of the primer is promoted, the primer cohesive force is increased, and a stronger adhesive force is obtained.

According to the third aspect of the present invention, stable and strong adhesiveness, sufficient performance as a lenticular lens and suitability in the manufacturing process can be obtained. That is, a three-dimensional or variable printed matter which is flexible and has a transparent thin plate-like base material firmly adhered to the contact surface with the lenticular lens and the printed pattern and is not peeled off even when curved or bent is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of a three-dimensional or variable printed material of the present invention.

FIG. 2 is a step (a) of the three-dimensional or variable printed matter of the present invention,
It is sectional explanatory drawing which shows (B), (C), and (D).

FIG. 3 is a front explanatory view of a plate cylinder used for molding the lenticular lens of the present invention.

FIG. 4 is an explanatory view showing an embodiment of an apparatus used for forming a lenticular lens of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transparent thin plate-shaped substrate 2 ... Printed part 3 ... Transparent primer part 4 ... Lenticular lens 5 ... Three-dimensional or variable printed matter 6 ... Plate cylinder having the shape of a lenticular lens
7 ... Winding of transparent base material coated with primer on one side 8
... Winding of transparent substrate with lenticular lens formed 9
... UV source 10 ... UV curable resin tank 11 ... Nip roll 12, 13, 14 ... Guide roll

Claims (3)

[Claims] 1. A transparent thin plate-shaped substrate having a printed portion containing at least an image for three-dimensional or variable printing through a transparent primer portion on one surface thereof, and the opposite surface of the transparent thin plate-shaped substrate. A three-dimensional or variable printed matter, characterized in that a lenticular lens is provided with a radically polymerizable ionizing radiation curable resin via a transparent primer portion. 2. The three-dimensional or variable printed matter according to claim 1, wherein the transparent primer portion contains a crosslinking agent. 3. The transparent primer portion has a thickness of 0.01.
3. The three-dimensional or variable printed matter according to claim 1 or 2, wherein the lenticular lens has a thickness of 0.01 mm to 0.2 mm.