JPH05273763A - Manufacture of stereoscopic image display board - Google Patents

Abstract

PURPOSE:To provide the process for manufacture of the stereoscopic image display board having stereoscopic image patterns which have high adhesion to a base material and excellent curving resistance. CONSTITUTION:This process for manufacture of the display board consists in previously providing an adhesive layer 2 and a substrate 3 consisting of a photosetting resin compsn. in this order on the base material 1 and curing the substrate 3 by exposing the entire surface thereof, then providing an image layer 4 consisting of a photosetting resin compsn. on the substrate 3, exposing this image layer 4 through a mask 5 to cure the layer and removing the uncured parts, thereby forming the prescribed stereoscopic image patterns 6. The above- mentioned adhesive layer 2 is formed of a copolymer consisting of 35 to 50wt.% octyl acrylate, 45 to 60wt.% ethyl acrylate and 5 to 10wt.% vinyl pyrrolidone.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a stereoscopic image display panel in which an arbitrary image pattern is formed at a predetermined position on a base material. Such a display panel can be used, for example, as an instrument panel for various devices, a display panel on which maps, landscapes, etc. are arranged, a dial for a vehicle speedometer, and the like.

[0002]

2. Description of the Related Art Conventionally, images such as letters and numbers on a display board are generally formed by printing on a base material, and are usually flat images in many cases. However, in recent years, textures have been added to these display images in accordance with the demand for higher quality and diversification of products,
In order to improve decorativeness and visibility, three-dimensional images are being studied.

As a method for three-dimensionally displaying a display image,
For example, thick printing may be used to give a three-dimensional effect, and hot stamping may be used to transfer irregularities. However, both of them have the drawbacks of complicated image forming methods and poor mass productivity. Further, for example, mass production is possible by molding using a mold, but it is difficult to apply it to a fine pattern.

As a method of forming a three-dimensional image excellent in mass productivity and decorativeness, for example, in JP-A-2-122220, a photocurable resin layer is formed on a substrate, and the photocurable resin layer is used as a negative mask. To expose and cure the specified part,
There is disclosed a method for producing a three-dimensional image display panel by forming unevenness by developing and removing an uncured portion. Further, when it is used as a display board, it is necessary to withstand various stresses such as deformation when incorporated in a device and vibration during operation of the device.

[0005]

However, when the display panel is made into a three-dimensional structure and the thickness of the image portion increases, the stress against deformation increases accordingly, so that the peeling between the image portion and the base material becomes larger than that in the planar image. Therefore, it was difficult to provide sufficient adhesion to withstand bending. The present invention has been made in view of the above drawbacks, and an object thereof is to provide a method for manufacturing a display panel having a three-dimensional image pattern having high adhesion to a base material and excellent flex resistance. ..

[0006]

A method of manufacturing a stereoscopic image display panel according to claim 1, wherein an adhesive layer and a base layer made of a photocurable resin composition are previously provided in this order on a substrate, After the underlayer is entirely exposed and cured, an image layer made of a photocurable resin composition is provided on the underlayer, the image layer is exposed through a mask to be cured, and the uncured portion is removed to obtain a predetermined layer. A method of manufacturing a display panel for forming a stereoscopic image pattern, comprising:
The adhesive layer is formed of a copolymer of 35 to 50% by weight of octyl acrylate, 45 to 60% by weight of ethyl acrylate, and 5 to 10% by weight of vinylpyrrolidone.

According to a second aspect of the present invention, there is provided a method for producing a three-dimensional image display panel, wherein an adhesive layer and a base layer made of a photo-curable resin composition are provided in this order on a base material in advance, and the base layer is entirely exposed. After curing by curing, an image layer made of a photocurable resin composition is provided on the underlayer, the image layer is exposed through a mask to be cured, and the uncured portion is removed to form a predetermined stereoscopic image pattern. A method of manufacturing a display board, comprising:
Octyl acrylate 35-50% by weight, ethyl acrylate 45-60% by weight, and vinylpyrrolidone 5-1
An adhesive composition comprising 1 to 30% by weight of a copolymer of 0% by weight and 99 to 70% by weight of a photocurable resin composition as constituent components, and curing the underlayer at the same time It is characterized in that the layer is cured.

According to a third aspect of the present invention, there is provided a method for producing a three-dimensional image display panel, wherein an adhesive layer is provided on a substrate in advance, and then an image layer made of a photocurable resin composition is provided on the adhesive layer. A method of manufacturing a display panel, which comprises exposing the image layer through a mask to cure the image layer and the adhesive layer and removing an uncured portion to form a predetermined stereoscopic image pattern, wherein the adhesive layer is 35-50 wt% octyl acrylate, 45-60 wt% ethyl acrylate, and 5 vinylpyrrolidone
It is characterized by being formed from an adhesive composition containing 1 to 30% by weight of a copolymer of 10 to 10% by weight and 99 to 70% by weight of a photocurable resin composition as constituent components. From the above, the above object is achieved.

First, the invention according to claim 1 will be described below.

The photocurable resin composition used in the image layer in the present invention is not particularly limited as long as it has photocurability, and examples thereof include a binder polymer, a photopolymerizable oligomer, and A resin composition containing a photopolymerization initiator is preferable.

The binder polymer is preferably an acrylic polymer from the viewpoint of film property and sticking property, and examples thereof include methyl (meth) acrylate, propyl (meth) acrylate, -n-butyl (meth) acrylate, and ( Meta)
Isobutyl acrylate, octyl (meth) acrylate,
Lauryl (meth) acrylate, (meth) acrylic acid-2
-Ethylhexyl, 2-chloroethyl (meth) acrylate, methyl α-chloro (meth) acrylate, (meth)
A copolymer of (meth) acrylic acid with a (meth) acrylic acid ester such as phenyl acrylate or dimethylaminoethyl (meth) acrylate is preferable.

When the amount of (meth) acrylic acid in the binder polymer is small, it becomes insoluble in an alkaline aqueous solution and development cannot be carried out. On the contrary, when it is large, the compatibility with the solvent or other components is lowered, Since the resolution is also lowered, it is preferable to add 15 to 35% by weight of (meth) acrylic acid to 65 to 85% by weight of (meth) acrylic acid ester.

When the weight average molecular weight of the binder polymer is small, so-called cold flow is likely to occur. On the contrary, when the weight average molecular weight of the binder polymer is large, the solubility in an alkaline aqueous solution is lowered to make development difficult, and the resolution is also lowered. So
The range of 50,000 to 300,000 is preferable.

As the photopolymerizable oligomer, known photopolymerizable compounds such as urethane acrylate, epoxy acrylate and polyol acrylate can be used. In the present invention, the urethane represented by the following general formula (I) is used. It is preferable to use an acrylate alone or to use a urethane acrylate represented by the general formula (I) in combination with a known photopolymerizable compound.

[0015]

[Chemical 1]

In the formula (I), R ¹ and R ² are hydrogen or a methyl group, Y is a divalent hydrocarbon group having 2 to 20 carbon atoms,
q is an integer of 1 to 15, R ³ is a hydrocarbon group having 1 to 10 carbon atoms, and p is an integer of 1 to 100. Here, the divalent hydrocarbon group represented by Y is a hydrocarbon group composed of a straight chain, branched chain, alicyclic or aromatic moiety, such as a hexamethylene group, a tolylene group, or isophorone. Group, tetramethylxylylene group, naphthylene group and the like.

When the weight average molecular weight of the urethane acrylate represented by the formula (I) is small, the flexibility of the resin is lowered so that the effect of the present invention cannot be obtained. The range of 10,000 is preferred.

As the method for producing the urethane oligomer, any method may be adopted. For example, diisocyanate and diol are mixed and reacted at a ratio matching the composition ratio of the desired compound to give a urethane oligomer having an isocyanate group at the terminal. After the formation, a (meth) acrylate having a hydroxyl group may be added and reacted with an isocyanate group at the end. At this time, if necessary, the reaction may be carried out by dissolving in an organic solvent such as ethyl acetate, methyl ethyl ketone, or toluene, and a catalyst such as dibutyltin dilaurate may be added.

When the amount of the photopolymerizable oligomer decreases, the flexibility of the image layer after exposure and development decreases, and when the amount increases, cold flow easily occurs and the resolution decreases, so the binder polymer 100 is used. The amount is preferably 5 to 150 parts by weight, more preferably 10 parts by weight.
~ 100 parts by weight.

The photopolymerization initiator used in the present invention may be any one having the property of activating the photopolymerizable polymer by actinic rays such as ultraviolet rays and visible rays to initiate polymerization.

As those which are activated by ultraviolet rays, for example, benzoin, benzoin methyl ether, benzoin ethyl ether, benzyl dimethyl ketal, benzophenone, dimethylaminobenzophenone, Michler's ketone, benzyl anthraquinone, t-butyl anthraquinone, 2-methyl anthraquinone, 2 -Aromatic carbonyl compounds such as ethylanthraquinone, 2-aminoanthraquinone and 2-chloroanthraquinone; thioxanthones such as thioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone and 2,4-diethylthioxanthone; benzoyl peroxide, di-t -Peroxides such as butyl peroxide, dicumyl peroxide, cumene hydroperoxide; (di) such as benzenediazonium It can be used known ones such as zone compounds.

The amount of the photopolymerization initiator is determined in consideration of the thickness of the image layer made of the photocurable resin composition and the irradiation light amount. For example, when it is necessary to shorten the exposure time in the process, it is necessary to increase the amount of the photopolymerization initiator. Therefore, the addition amount of the photopolymerization initiator is 0.1% with respect to 100 parts by weight of the binder polymer. 1 to 10 parts by weight is preferable.

Further, the photocurable resin composition used in the present invention contains a photopolymerizable monomer such as tetraethylene glycol diacrylate; dioctyl phthalate, triethylene glycol diacetate, p-toluene sulfonamide, N-ethyltoluene. Plasticizers such as sulfonamides;
A thermal polymerization inhibitor such as hydroquinone or p-methoxyphenol; a stabilizer; an ultraviolet absorber; an antioxidant; a solvent such as methyl ethyl ketone or toluene may be added.

The copolymer used in the adhesive layer in the present invention is used to enhance the adhesion between the base material and the underlayer, which will be described later, and contains 35 to 50% by weight of octyl acrylate and 45 to 60% by weight of ethyl acrylate. , And 5 to 10% by weight of vinylpyrrolidone.

The weight average molecular weight of the above copolymer is preferably in the range of 100,000 to 1,000,000 because the weight average molecular weight of the copolymer tends to swell with the alkaline aqueous solution used in the developing step, and the weight average molecular weight of the copolymer cannot be developed with the alkaline aqueous solution.

The photocurable resin composition used for forming the underlayer in the present invention is used for enhancing the adhesiveness of the three-dimensional image pattern formed by exposing and developing the image layer.
In order to sufficiently bring out the effect of the present invention, it is preferable to use the same one as the photocurable resin composition used in the image layer. For example, from the binder polymer, the photopolymerizable oligomer, and the photopolymerization initiator, The following resin composition is preferably used.

The substrate used in the present invention is not particularly limited, but generally, acrylic resin, polycarbonate, polyethylene terephthalate (PE
A plastic plate such as T); a glass plate; a ceramic plate; a metal plate or the like is preferably used, and is selected in consideration of necessary properties such as flexibility, transparency and heat resistance depending on the application. Further, an arbitrary image may be printed in advance on these base materials.

The method for manufacturing the stereoscopic image display panel of the present invention will be described below with reference to FIGS. 1, 2 and 3.

In FIG. 1, reference numeral 1 denotes a base material, and the base material 1
The adhesive layer 2 is formed thereon. The adhesive layer 2 is prepared by, for example, solvent casting the above adhesive composition on a synthetic resin film such as polyethylene terephthalate (PET) to prepare an adhesive film having a certain thickness, and depositing the film on the substrate 1. It is formed by laminating it by a heat laminating method or the like. If the thickness of the adhesive layer 2 becomes thin, the adhesiveness with the base material 1 described later decreases, and if it becomes thick, the end surface of the adhesive layer 2 swells due to the alkaline aqueous solution in the developing step.
The range of ˜30 μm is preferable.

Next, the base layer 3 is provided on the adhesive layer 2. The underlayer 3 is made of, for example, a photocurable resin composition,
It is formed by solvent casting in advance to prepare an underlayer film having a certain thickness, and laminating it on the adhesive layer 2 by a thermal laminating method or the like. The thickness of the underlayer 3 is preferably in the range of 10 to 30 μm in order to obtain the effects of the present invention.

The base layer 3 is provided to enhance the adhesiveness between the base material 1 and the image layer 4, and is cured by irradiating the entire surface with ultraviolet rays from, for example, an ultra-high pressure mercury lamp or a metal halide lamp. ..

Then, the image layer 4 is provided on the underlayer 2. The image layer 4 is formed by, for example, solvent casting the photocurable resin composition on a synthetic resin film such as PET to form a photocurable resin film having a constant thickness, and then applying the film to the underlayer 3. However, if the thickness of the film is increased, the evaporation of the solvent contained in the film is hindered, which is not preferable, and the thickness after drying is usually in the range of 50 to 200 μm. Preferably. Therefore, for example, the thickness is 500 μm
In order to obtain the image layer 4 of 5, for example, five photocurable resin films having a thickness of 100 μm may be laminated on the underlayer 3 by a thermal laminating method or the like.

Further, the thickness of the image layer 4 is preferably 0.3 to 2 mm because it becomes difficult to express a stereoscopic image when it is thin and it becomes difficult to express a fine image when it is thick.

As a method of forming an image pattern on the substrate 1, for example, as shown in FIG. 2, an image layer 4 laminated on a base layer 3 is provided with a predetermined image pattern. After superimposing the photomasks 5, light is irradiated from above the photomasks 5 to cure only the portions of the image layer 4 to be image-patterned, and then the uncured portions are removed by development. .. In this way, as shown in FIG.
A stereoscopic image display board in which a stereoscopic image pattern 6 corresponding to the negative mask 5 is formed on the image layer 4 is obtained.

Stereoscopic image pattern forming the display panel of the present invention
The image layer is obtained by exposing and developing the image layer as described above, but the light source for exposing is not particularly limited, and conventionally known ones can be used, for example, an ultrahigh pressure mercury lamp. , Metal halide lamps and the like are preferably used.

The developing solution used for the development is not particularly limited, but for example, an aqueous solution of sodium carbonate having a concentration of 0.5 to 5% by weight is used. The developing device is not particularly limited, and a known device can be used.

Next, the invention according to claim 2 will be described. The photocurable resin composition used for forming the image layer in the invention is not particularly limited as long as it has photocurability, and examples thereof include a binder polymer, a photopolymerizable oligomer, and A resin composition comprising a photopolymerization initiator is preferable, and as the binder polymer, the photopolymerizable oligomer and the photopolymerization initiator, each component used in the invention of claim 1 can be used.

Further, the photocurable resin composition used in the present invention contains a photopolymerizable monomer such as tetraethylene glycol diacrylate; dioctyl phthalate, triethylene glycol diacetate, p-toluene sulfonamide, N-ethyltoluene. Plasticizers such as sulfonamides;
A thermal polymerization inhibitor such as hydroquinone or p-methoxyphenol; a stabilizer; an ultraviolet absorber; an antioxidant; a solvent such as methyl ethyl ketone or toluene may be added.

The adhesive composition used for the adhesive layer in the present invention is used for enhancing the adhesion between the base material and the underlayer, which will be described later, and contains 40 to 50% by weight of octyl acrylate and 50 to 60% by weight of ethyl acrylate. %, And 5 to 10% by weight of vinylpyrrolidone, and a photocurable resin composition as constituent components. As the photocurable resin composition, those used in the image layer are preferably used.

In the above adhesive composition, when the amount of the portion corresponding to the copolymer is small, there is no effect on the adhesiveness to the substrate, and when the amount is large, it is swollen by being attacked by the alkaline aqueous solution used in the developing step. , 1 to 30% by weight. In the adhesive composition, the amount of the portion corresponding to the photocurable resin composition is 99 to 70% by weight.

The photocurable resin composition used in the undercoat layer in the present invention is used for enhancing the adhesion of a three-dimensional image pattern formed by exposure and development of the image layer, so that the effects of the present invention can be sufficiently exerted. In order to exert the effect, it is preferable to use the same one as the photocurable resin composition used for the image layer.

Examples of the base material used in the present invention include those used in the invention of claim 1.

In the present invention, an adhesive film and an underlayer film are produced in the same manner as in the invention described in claim 1, and after laminating on the substrate in this order to form the adhesive layer and the underlayer, Ultraviolet rays are irradiated from above the underlayer to cure both layers at the same time. Next, an image layer made of a photocurable resin composition is provided on the underlayer, and the image layer is exposed through a photomask and developed to produce a three-dimensional image display panel.

As the light source for exposure, the developing solution and the developing device used in the present invention, those used in the invention described in claim 1 can be used.

Next, the invention according to claim 3 will be described. The photocurable resin composition used for forming the image layer in the invention is not particularly limited as long as it has photocurability, and examples thereof include a binder polymer, a photopolymerizable oligomer, and A resin composition comprising a photopolymerization initiator is preferable, and as the binder polymer, the photopolymerizable oligomer and the photopolymerization initiator, each component used in the invention of claim 1 can be used.

Further, the photocurable resin composition used in the present invention contains a photopolymerizable monomer such as tetraethylene glycol diacrylate; dioctyl phthalate, triethylene glycol diacetate, p-toluene sulfonamide, N-ethyltoluene. Plasticizers such as sulfonamides;
A thermal polymerization inhibitor such as hydroquinone or p-methoxyphenol; a stabilizer; an ultraviolet absorber; an antioxidant; a solvent such as methyl ethyl ketone or toluene may be added.

The adhesive composition used in the adhesive layer in the present invention is used for enhancing the adhesion between the photo-curable resin layer and the base material described below, and contains 40 to 50% by weight of octyl acrylate and 50% of ethyl acrylate. -60% by weight and vinylpyrrolidone 5-10% by weight, and a photocurable resin composition as constituent components. Examples of the adhesive composition include those used in the invention of claim 2.

In the above adhesive composition, when the amount of the portion corresponding to the copolymer is small, there is no effect on the adhesiveness to the substrate, and when the amount is large, it is swelled by being attacked by the alkaline aqueous solution used in the developing step. , 1 to 30% by weight. In the adhesive composition, the amount of the portion corresponding to the photocurable resin composition is 99 to 70% by weight.

As the base material used in the present invention, the base material used in the invention described in claim 1 can be used.

In the present invention, an adhesive film is prepared and laminated on a substrate to form an adhesive layer in the same manner as in the invention described in claim 1, and then a photocurable resin is formed on the adhesive layer. An image layer composed of the composition is formed. Next, the uncured portions of the image layer and the adhesive layer are removed by exposing and developing from above the image layer through a photomask to produce a three-dimensional image display board.

As the light source for exposure, the developing solution and the developing device used in the present invention, those used in the invention described in claim 1 can be used.

EXAMPLES The present invention will be described below based on examples.

(Example 1) [Preparation of photopolymerizable oligomer] Hexamethylene diisocyanate (504 g) was placed in a 5-liter four-necked flask equipped with a dropping funnel, a thermometer, a cooling tube and a mechanical stirrer.
(3 mol), 826 g of dry methyl ethyl ketone (MEK) and 1 g of dibutyltin dilaurate (catalyst) as a solvent were added, and 916 g of polyethylene glycol (2 mol, average molecular weight: 458) was added with stirring and refluxed for 5 hours. Then, 232 g (2 mol) of 2-hydroxyethyl acrylate was added dropwise, the mixture was refluxed for another 5 hours for reaction, and then MEK was evaporated to prepare a photopolymerizable oligomer.

[Preparation of Adhesive] <Adhesive (B-1)> 400 g (2.2 mol) of octyl acrylate was added to a 5 liter four-necked flask equipped with a dropping funnel, a thermometer, a condenser and a mechanical stirrer.
Lauroyl peroxide 3 dissolved in 50 ml of ethyl acetate while adding 550 g (5.5 mol) of ethyl acrylate, 50 g (0.45 mol) of vinylpyrrolidone and 1000 g of dry ethyl acetate as a solvent with stirring.
g was added dropwise at 1 hour intervals and heated under reflux for 10 hours to prepare a transparent adhesive composition (weight average molecular weight Wn: 800,000) solution.

[Preparation of Adhesive (B-1) Film] The adhesive (B-1) solution prepared above was cast on a PET film and dried to give an adhesive (B-1) having a thickness of 20 μm. ) A film was prepared.

[Preparation of Photocurable Resin Composition] 100 parts by weight of binder polymer (methyl methacrylate: butyl methacrylate: methacrylic acid = 50: 25: 25 [weight ratio], Mw: 150,000) Photopolymerizable oligomer 75 Parts by weight Photopolymerizable monomer (component: tetraethylene glycol 75 parts by weight diacrylate) photopolymerization initiator (component: benzyl dimethyl ketal) ("Irgacure 651" manufactured by Ciba-Geigy) 2.5 parts by weight 250 parts by weight of each of the above components A part of MEK was dissolved to prepare a photocurable resin composition solution.

[Production of Photocurable Resin Film] The photocurable resin composition solution prepared above was treated with PE having a thickness of 75 μm.
It was cast on a T film and dried at 80 ° C. for 10 minutes to prepare a photocurable resin film having a thickness of 100 μm.

[Preparation of Film for Underlayer] The photocurable resin composition solution prepared above was cast on a PET film having a thickness of 75 μm and dried at 80 ° C. for 10 minutes to give a thickness of 2
An underlayer film having a thickness of 0 μm was produced.

[Production of Stereoscopic Image Display Panel] A polycarbonate sheet having a thickness of 500 μm was used as a substrate, and one sheet of the adhesive (B-1) film produced above was laminated on this sheet by a thermal lamination method. Then, one layer of the underlayer film was laminated on the adhesive film by a thermal laminating method, and then 50% by an ultra high pressure mercury lamp.
The entire surface was irradiated with ultraviolet rays having an intensity of 0 mJ / cm ² to form an adhesive layer and a base layer. On this underlayer, five photocurable resin films (thickness 100 μm) produced above were laminated by a thermal laminating method to form an image layer (thickness 500).
μm) was formed. Then, a photomask that shields the portions other than the portions corresponding to the characters and scales was placed on the photocurable resin layer, and ultraviolet rays having an intensity of 1000 mJ / cm ² were irradiated by an ultrahigh pressure mercury lamp. After the image layer is exposed and cured by irradiation with ultraviolet rays, the exposed surface of the resin layer is exposed to 30 ° C. and 1%.
Was developed with an aqueous solution of sodium carbonate to obtain a stereoscopic image display panel having an image pattern in which portions corresponding to characters and scales were convex.

[Peeling Strength] In order to evaluate the adhesion of the three-dimensional image display panel obtained above, the three-dimensional image display panel was cut into a 1-inch width to obtain a test piece. A peeling test (peeling speed: 50 mm / min) for peeling the image pattern of the test piece and the substrate in the 180 ° direction was performed, and the measurement results are shown in Table 1.

[Bending Test] In order to evaluate the adhesion of the three-dimensional image display panel obtained above, the three-dimensional image display panel was cut into a 1-inch width to obtain a test piece, and this test piece was formed into a round bar having a diameter of 2 mm. Wrap it around it so that the cross-sectional shape is U-shaped,
The presence or absence of peeling of the image pattern and the substrate was observed, and the results are shown in Table 1.

[Evaluation of swelling property] In the production of a three-dimensional image display panel, the exposed and cured image layer was developed with a 1% sodium carbonate aqueous solution at 30 ° C., and then the swelling condition of the end face of the image pattern was observed. The results are shown in Table 1.

Example 2 [Preparation of Adhesive] <Adhesive (B-2)> 400 g of octyl acrylate was added to a 5 liter four-necked flask equipped with a dropping funnel, a thermometer, a condenser and a mechanical stirrer. 2.2 mol),
500 g (5 mol) of ethyl acrylate, 100 g (0.9 mol) of vinylpyrrolidone, and 1000 g of dry ethyl acetate as a solvent were added, and 3 g of lauroyl peroxide dissolved in 50 ml of ethyl acetate was added dropwise at 1 hour intervals while stirring. The mixture was heated under reflux for 10 hours to prepare a transparent adhesive composition (Wn: 800,000) solution.

[Preparation of Adhesive (B-2) Film] The adhesive (B-2) solution prepared above was cast on a PET film and dried to obtain an adhesive (B-2) having a thickness of 20 μm. ) A film was prepared.

Instead of the adhesive (B-1), the adhesive (B-
A three-dimensional image display board was produced in the same manner as in Example 1 except that 2) was used, and the obtained three-dimensional image display board was
In the same manner as in Example 1, the peel strength was measured, the bending test and the swelling property were evaluated, and the results are shown in Table 1.

(Examples 3 to 6 and Comparative Examples 1 to 3) An adhesive layer shown in Table 1 was formed from the adhesive (B-1) film or the adhesive (B-2) film to form a base layer (Examples). A stereoscopic image display panel was produced in the same manner as in Example 1 except that the thickness of the one produced in 1) was changed as shown in Table 1. With respect to the obtained three-dimensional image display board, the peel strength was measured, the bending test and the swelling property were evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0066]

[Table 1]

(Examples 7 to 14, Comparative Examples 4 and 5) [Preparation of Adhesive Film] In the composition shown in Table 2, the photocurable resin composition solution prepared in Example 1 and Example 1 were used. The adhesive composition prepared from the prepared adhesive (B-1) or the adhesive (B-2) prepared in Example 2 was cast on a PET film and dried to prepare an adhesive film. ..

[Production of Stereoscopic Image Display Panel] A polycarbonate sheet having a thickness of 500 μm was used as a substrate, and one sheet of the adhesive film produced above was laminated on the sheet by a thermal laminating method. After laminating one sheet of the underlayer film produced in Example 1 on the adhesive film by a thermal laminating method, it was subjected to 5 by an ultra high pressure mercury lamp.
The entire surface was irradiated with ultraviolet rays having an intensity of 00 mJ / cm ² to be cured to form an adhesive layer and a base layer having the thickness shown in Table 2. Five photocurable resin films prepared in Example 1 were laminated on this underlayer by a thermal lamination method to form an image layer (thickness: 500 μm), and then exposure was performed in the same manner as in Example 1. Development was performed to obtain a stereoscopic image display board.

[Peel Strength, Bending Test and Swelling Evaluation]
For the obtained three-dimensional image display board, in the same manner as in Example 1,
The peel strength was measured, the bending test and the swelling property were evaluated, and the results are shown in Table 2.

[0070]

[Table 2]

(Examples 15 to 22, Comparative Examples 6 and 7) [Preparation of Adhesive Film] In the composition shown in Table 3, the photocurable resin composition solution prepared in Example 1 and Example 1 were used. The adhesive composition prepared from the prepared adhesive (B-1) or adhesive (B-2) was cast on a PET film and dried to prepare an adhesive film.

[Preparation of Stereoscopic Image Display Panel] A polycarbonate sheet having a thickness of 500 μm was used as a substrate, and one adhesive film prepared above was laminated on the sheet by a thermal laminating method to form an adhesive layer. After the formation of Example 1, without forming a base layer on this adhesive layer,
Five photo-curable resin films prepared in (1) were laminated by a thermal laminating method to form an image layer (thickness: 500 μm). Then, from above the image layer, in the same manner as in Example 1, 1
By irradiating the entire surface with ultraviolet light with an intensity of 000 mJ / cm ² ,
Exposure and development were performed to obtain a stereoscopic image display board.

[Peeling Strength, Bending Test and Swelling Evaluation] With respect to the obtained three-dimensional image display board, the peeling strength was measured, the bending test and the swelling property were evaluated in the same manner as in Example 1, and the results are shown in Table 3. It was shown to.

[0074]

[Table 3]

[0075]

According to the invention described in claim 1 and the invention described in claim 2, by providing an adhesive layer and a base layer between the base material and the image layer, the base material and the three-dimensional image pattern are formed. (EN) Provided is a three-dimensional image display panel which has improved adhesion and prevents peeling of the three-dimensional image pattern due to stress generated when the three-dimensional image pattern is deformed, and is excellent in bending resistance. According to the invention of claim 3, by providing an adhesive layer between the base material and the image layer, the adhesion between the base material and the stereoscopic image pattern is enhanced, and the stress generated when the stereoscopic image pattern is deformed. Thus, the three-dimensional image pattern is prevented from peeling off, and a three-dimensional image display panel excellent in bending resistance is provided.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an adhesive layer, a base layer and an image layer formed on a substrate in the present invention.

FIG. 2 is a schematic cross-sectional view showing a state of exposing an image layer formed on a substrate in the present invention.

FIG. 3 is a schematic cross-sectional view showing a stereoscopic image display panel formed on a substrate in the present invention.

[Explanation of symbols]

 1 Base Material 2 Adhesive Layer 3 Underlayer 4 Image Layer 5 Photomask 6 Stereoscopic Image Pattern

Claims (3)

[Claims] 1. An adhesive layer and a base layer made of a photocurable resin composition are previously provided on a base material in this order, and the base layer is entirely exposed and cured, and then the base layer is photocured. A method for manufacturing a display panel, comprising: providing an image layer made of a resin composition; exposing the image layer through a mask to cure the resin; and removing an uncured portion to form a predetermined stereoscopic image pattern. A method for producing a stereoscopic image display panel, wherein the layer is formed from a copolymer of 35 to 50% by weight of octyl acrylate, 45 to 60% by weight of ethyl acrylate, and 5 to 10% by weight of vinylpyrrolidone. 2. An adhesive layer and a base layer made of a photocurable resin composition are previously provided on a base material in this order, the base layer is entirely exposed and cured, and then the base layer is photocured. A method for manufacturing a display panel, comprising: providing an image layer made of a resin composition; exposing the image layer through a mask to cure the resin; and removing an uncured portion to form a predetermined stereoscopic image pattern. 1 to 30% by weight of a copolymer consisting of 35 to 50% by weight of octyl acrylate, 45 to 60% by weight of ethyl acrylate, and 5 to 10% by weight of vinylpyrrolidone,
Manufacture of a three-dimensional image display panel, characterized by being formed from an adhesive composition containing 99 to 70% by weight of a photocurable resin composition as a constituent component, and curing the underlayer and simultaneously curing the adhesive layer. Method. 3. An image layer comprising an adhesive layer formed on a substrate in advance, an image layer made of a photocurable resin composition provided on the adhesive layer, and the image layer is exposed through a mask to expose the image layer. And a method for manufacturing a display panel in which an adhesive layer is cured and an uncured portion is removed to form a predetermined three-dimensional image pattern, wherein the adhesive layer comprises octyl acrylate 35 to 50 wt% and ethyl acrylate 45 to 1 to 30% by weight of a copolymer consisting of 60% by weight and 5 to 10% by weight of vinylpyrrolidone
And a photocurable resin composition (99 to 70% by weight) from the adhesive composition.