JP2002139841A - Photosensitive resin sign board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a photosensitive resin sign board excellent in designing with respect to a photosensitive resin composition sign board used for a display panel, a decorative shield, a nameplate, a Braille indicator panel, etc. SOLUTION: (1) the photosensitive resin sign board is a sign board having a relief obtained from a photosensitive resin laminate having at least a base and a photosensitive resin layer and a layer having an image has further been disposed on the base side. (2) In the photosensitive resin sign board described in the item (1), the layer having an image is a layer directly printed on the rear face of the base. (3) In the photosensitive resin sign board described in the item (1), the UV absorbance of the photosensitive resin layer at 400 nm is <=0.4. (4) In the photosensitive resin sign board described in the item (1), the total light transmittance of the base is >=60%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sign board using a photosensitive resin used for a sign board such as an exhibition panel, a decorative shield, a name plate, a Braille display board, etc., and more particularly to a photosensitive plate excellent in design. The present invention provides a transparent resin marker plate.

[0002]

2. Description of the Related Art Conventionally, as a photosensitive resin laminate using a photosensitive resin obtained by exposing a photosensitive resin layer through a pattern and then developing the same, Japanese Patent Laid-Open No.
It is disclosed in Japanese Unexamined Patent Publication No. 55927/1997 and Japanese Unexamined Patent Application Publication No. 9-6267, and is used for a Braille panel having a relief, a sign board including Braille, and the like. However, design requirements for the sign plate have recently been increased, and a simple sign plate in which a conventional concavo-convex pattern is formed and colored with a color paint has become unsatisfactory.

[0003]

SUMMARY OF THE INVENTION The present invention relates to display panels,
It is an object of the present invention to provide a photosensitive resin marker plate having an excellent design property in a photosensitive resin composition marker plate used for a decorative shield, a name plate, a Braille display plate or the like.

[0004]

Means for Solving the Problems In order to solve the above problems, the present inventors have made intensive studies, studied, and studied, and as a result, have finally completed the present invention. That is, the present invention is at least a sign plate having a relief obtained from a photosensitive resin laminate having a support and a photosensitive resin layer, wherein a layer having an image is further laminated on the support side. Photosensitive resin signboard. The photosensitive resin signboard as described above, wherein the layer having an image is a layer directly printed on the back surface of the support. The photosensitive resin marker plate described above, wherein the ultraviolet absorbance at 400 nm of the photosensitive resin layer is 0.4 or less,
The photosensitive resin signboard as described above, wherein the total light transmittance of the support is 60% or more.

[0005]

Next, the present invention will be described in more detail. The images used in the present invention generally mean all images expressed in two dimensions, and any image that represents a person, a shape or a pattern can be used. For example, there are a person, a landscape, a design, a pattern, and the like. In the present invention, a character may be included therein. Examples of the layer having a specific image include a photograph, a picture, and a printed matter. The layer having an image may be paper, a film or a plate as a support, or may be without a support.

Examples of the method of laminating a layer having an image used in the present invention include a method of directly printing on the back surface, a method of laminating a photograph or a printed matter having an image provided on a support such as paper or film, and the like. Can be

The method of printing directly on the back surface of the support used in the present invention includes screen printing, ink jet printing, heat transfer printing, etc., but screen printing is excellent because of its adaptability to a plate-like support.

As a method of laminating a photograph or a printed matter having an image used in the present invention, it is possible to apply a method of applying an adhesive or a pressure-sensitive adhesive to the back surface of the support and then laminating the photograph or the printed matter. . Further, if there is a frame or the like for fixing the entire sign plate, it is possible to laminate a layer having an image by superimposing a photograph or printed matter having an image on the back surface of the support and fixing it with a frame or the like.

The photosensitive resin layer used in the present invention is a colorless or low-colored photosensitive resin layer, and needs to have an ultraviolet absorbance at 400 nm of 0.4 or less. As the photosensitive resin layer used in the present invention, a known resin layer can be used. In order to make the absorbance at 400 nm 0.4 or less, a material that satisfies the absorbance of each raw material may be selected. Specific photosensitive resin components include soluble polymer compounds (eg, polyvinyl alcohol, cationic polyamide, polyetheresteramide, polyetheramide, polyurethane, etc.), photopolymerizable or photocrosslinkable monomers (eg, polyhydric alcohols) Acrylate, polyhydric alcohol epoxy acrylate, N-methylol acrylamide, etc.), photopolymerization initiator (for example, benzyl dimethyl ketal, benzoin dimethyl ether, etc.), if necessary, heat stabilizer, plasticizer, surfactant, ultraviolet absorber, etc. Is a photosensitive resin composition obtained by blending

Specific examples of commercially available transparent support resins used in the present invention include polyester resins such as polycarbonate resins and polyethylene terephthalate resins.
An acrylic resin such as polymethyl methacrylate, a copolymer resin of polymethyl methacrylate and styrene, and a modified polyethylene terephthalate resin obtained by copolymerizing dicyclohexanedimethanol and the like are included. Acrylic resins and copolymer resins of poly (methyl methacrylate) and styrene are preferred from the viewpoint of light resistance. In addition, a coating layer containing an ultraviolet absorber may be provided on the support to improve light resistance, or an acrylic resin having excellent light resistance may be laminated on the surface,
A modified polyethylene terephthalate resin provided with an acrylic resin layer or a layer containing an ultraviolet absorber or a modified polyethylene terephthalate resin containing an ultraviolet absorber is preferred for improving light resistance. These resins may be modified by copolymerization or blending to improve the quality such as transparency, or may be modified by blending additives such as a plasticizer.

The thickness of the support used in the present invention is usually 1 m.
A thickness suitable for the application and design is selected in the range of m to 10 mm. A support having a thickness of less than 1 mm is liable to cause warpage of the resin plate itself, which is not suitable for use as a signboard, and a thickness of more than 10 mm is not preferable because the plate cannot be easily cut or the weight becomes heavy. .

The hardness of the support which can be used in the present invention is required to have a Shore D hardness of 35 ° or more, preferably 55 ° or more, particularly preferably 75 °. When the Shore D hardness is less than 35 °, the resin plate itself is warped or lacks the holding property as a sign plate, which is not preferable.

The photosensitive layer used in the present invention needs to have a thickness of at least 500 .mu.m, preferably 800 to 1200 .mu.m, for use in Braille applications. If it exceeds 1200 μm, the image reproducibility decreases, which is not preferable.

The support used in the present invention is preferably transparent from the viewpoint of design, and has a total light transmittance of 60% or more, preferably 65% or more, particularly preferably 70% or more. If the total light transmittance is less than 60%, it is unsuitable for a sign plate which lacks quality when processed into a sign plate and has excellent design properties.

Next, as a method for producing the photosensitive resin laminate of the present invention, an adhesive described later is applied to the support, and a photosensitive resin layer is laminated by a known method. Body can be manufactured. As a method for laminating the photosensitive resin on the support, for example, hot pressing, casting, melt extrusion, solution casting, laminating and the like can be used to laminate the photosensitive resin on the support.

The photosensitive resin layer is prepared in advance by laminating a resin film such as polyethylene terephthalate on a support as a support (hereinafter referred to as a photosensitive resin laminate precursor). May be peeled off from the resin film and laminated on a resin support.

As a method for preparing the photosensitive resin laminate precursor, a method for producing a usual photosensitive resin laminate for a printing plate can be adopted. A cover which is coated with a transparent polymer having no tackiness and which is dispersed or dissolved in a developer (such as polyvinyl alcohol or cellulose, also referred to as a slip coat layer) to a thickness of 1 to 3 μm. A photosensitive resin layer precursor comprising a photosensitive resin layer, a slip coat layer, and a cover film is obtained between a film and a polyester film having a thickness of 125 μm, for example.

In the present invention, when a photosensitive resin layer (which may have a slip coat layer or a cover film) is bonded to the resin support, a known adhesive is used as an adhesive layer to be used. Specific examples thereof include a polyester urethane-based adhesive and an epoxy-based adhesive obtained by curing a soluble polyester with a polyvalent isocyanate. Among them, polyester urethane-based adhesives are preferable because of their excellent adhesion with the photosensitive resin,
Among the polyester urethane-based adhesives, an adhesive composed of a polyester and an isocyanurate-type polyvalent isocyanate is particularly preferable from the viewpoint of low-temperature drying. In the adhesive layer composition,
Other minor components can be added. Examples of the additives include a plasticizer, a dye, an ultraviolet absorber, an antihalation agent, a surfactant, and a photopolymerizable vinyl monomer.

As a method of providing the adhesive layer on the support,
Generally, the solvent is removed after applying the adhesive layer composition solution to a predetermined thickness. As a coating method, a known method such as a roll coater, a curtain flow coater, a slit die coater, a gravure coater, and a spray can be used. The drying treatment of the adhesive layer after coating the support is generally performed by blowing hot air in a drying oven. The drying temperature of the adhesive layer used in the present invention is 15 ° C to 80 ° C.
Is less than 20 ° C., and preferably 20 ° C. to 70 ° C. If the temperature exceeds 80 ° C., the support is undesirably deformed such as warpage.
If the temperature is lower than 15 ° C., the drying time becomes longer, which is not preferable.

The thickness of the adhesive layer needs to be in the range of 0.5 μm to 100 μm. When the thickness is 0.5 μm or less, the adhesive force between the photosensitive resin layer and the adhesive layer does not appear. On the other hand, if the thickness of the adhesive layer exceeds 50 μm, there is a problem that the time required for drying the coating liquid becomes long. For such a reason, the thickness of the adhesive layer needs to be in the range of 0.5 μm to 100 μm, and preferably 1 μm to 50 μm.

As described above, the method for producing the sign board of the present invention from a photosensitive resin laminate having a support plate, an adhesive layer, and a photosensitive resin layer (which may further have a slip coat layer or a cover film) is described. The method can be adopted to produce a normal printing plate, for example, through a slip coat layer on the photosensitive resin layer, or without, without contact, a negative film having a transparent image portion is closely adhered and overlapped, When exposure is performed by irradiating an actinic ray from above, only the exposed portions are insolubilized and photocured. Actinic rays are usually 300-4
A light source such as a high-pressure mercury lamp having a wavelength of about 50 nm, an ultra-high-pressure mercury lamp, a metal halide lamp, a xenon lamp, or the like can be used.

Next, a relief plate having a clear image area is obtained by dissolving and removing the non-exposed portion with an appropriate solvent, particularly, neutral water in the present invention. For this purpose, a spray developing device, a brush developing device, or the like can be used.

By the above method, the sign board of the present invention having a relief can be prepared, and various methods can be used, such as coloring the relief with a paint or putting a dye in a support. Thus, the use of the sign board can be expanded.

[0024]

EXAMPLES Next, the present invention will be described specifically with reference to examples, but the present invention is not limited to these examples.
The UV absorbance and the light resistance test were measured by the following methods. UV absorbance: 30 mm x 70 mm of the photosensitive resin composition
(Thickness: 800 μm), and the absorbance of ultraviolet light at 400 nm was measured with a U-3210 type recording spectrophotometer manufactured by Hitachi, Ltd. Total light transmittance: Measured using a turbidity meter (Hazemeter, NDH-1001DP) manufactured by Nippon Denshoku Industries Co., Ltd.

Example 1 An acrylic plate (polymethyl methacrylate resin) having a thickness of 2.0 mm and a total light transmittance of 92% was used as a support. The adhesive layer used a polyester urethane-based adhesive, and the composition solution for the adhesive layer was prepared as follows. 80 parts by weight of a polyester resin “Vylon RV-200” manufactured by Toyobo Co., Ltd. was dissolved by heating at 80 ° C. in 1940 parts by weight of a mixed solvent of toluene / methyl ethyl ketone = 80/20 (weight ratio). After cooling, 20 parts by weight of "Desmodur HL" of isocyanurate-type polyisocyanate manufactured by Sumitomo Bayer Urethane Co., Ltd. using hexamethylene diisocyanate and toluene diisocyanate as raw materials as isocyanurate-type polyisocyanate, and triethylenediamine 0 as a curing catalyst 0.06 parts by weight and stirred for 10 minutes. The composition solution for an adhesive layer thus obtained was coated with a film having a thickness of 12
It was applied to an acrylic plate having a thickness of 2.0 mm to a thickness of 2.0 μm and dried and cured at 50 ° C. for 20 minutes to obtain a support having an adhesive layer applied thereto. As the photosensitive resin composition to be laminated,
55 parts of polyvinyl acetate (SMR-30L, manufactured by Shin-Etsu Chemical Co., Ltd.) having a saponification rate of 36% was added to 100 parts of methanol by 60 parts.
The mixture was stirred at 2 ° C. for 2 hours to completely dissolve the polymer. A solution obtained by dissolving 3 parts of sodium laurylbenzenesulfonate in 10 parts of water, 0.1 part of hydroquinone monomethyl ether, 40.9 parts of an acrylic acid adduct of bisphenol A diglycidyl ether, and 1 part of bendimethylketal Was added and mixed for 30 minutes to obtain a solution of the photosensitive resin composition. This solution was cast on a polyester film coated with 2 μm of polyvinyl alcohol having a saponification rate of 98%, and methanol was removed by evaporation to obtain a photosensitive resin layer precursor having a thickness of about 800 μm.

The method of applying the photosensitive resin layer precursor obtained as described above to the support coated with the adhesive layer is such that the photosensitive resin composition surface is aligned with the support surface, and then the water is interposed therebetween. Inject. The photosensitive resin layer was pressure-bonded at a room temperature of 25 ° C. through a rubber roller whose gap clearance was adjusted according to the thickness of the laminated layers, thereby producing a photosensitive resin laminated body. After leaving the photosensitive resin laminate for one day, cut it into a predetermined size with a circular saw tooth type cutter, put a negative on it, perform exposure, development, drying and post-exposure treatment. A display panel of 0.28 was obtained. The relief part of the obtained photosensitive resin sign board is colored with a blue spray paint (blue of acrylic spray made by Asahi Pen Co.), and a color picture of a sandy beach is attached to the back surface of the support not provided with the photosensitive resin layer. Fixed with frame. The sign board in which a layer having an image was further laminated on the obtained support side was a sign board excellent in design in which a display relief portion was colored blue against a sandy beach.

Comparative Example 1 A phenol board having a thickness of 2.0 mm and a total light transmittance of 0% was used as a support. A photosensitive resin laminate was manufactured in the same manner as in Example 1 except for using the same adhesive layer as in Example 1 except for the support. After the photosensitive resin laminate was allowed to stand for one day, it was cut into a predetermined size with a circular saw-type cutter, placed on a negative, exposed, developed, dried, and post-exposed to form a display panel pattern. The entire surface of the obtained display panel was colored with the spray paint of Example 1, and the relief portion was further colored with a gold acrylic spray paint (manufactured by Asahi Penn Co.). It was an inferior sign board.

Example 2 A photograph of the image used in Example 1 was changed to a sheet on which a stone pattern was printed to prepare a sign board having a layer having an image laminated on the support side. The resulting photosensitive resin marker plate was a marker plate having an excellent design in which the relief portion was colored with a blue acrylic spray against a stone pattern.

Example 3 Using the photograph of the sandy beach used in Example 1, lamination on the back surface of the support having no photosensitive resin layer was carried out by an adhesive bonding method. An adhesive for woodworking (adhesive for woodworking manufactured by Cemedine Co., Ltd.) was applied and immediately attached to a photograph for adhesion, thereby producing a sign plate in which a layer having an image was laminated on a support. The obtained photosensitive resin marker plate was a marker plate having an excellent design with a relief portion colored blue against the background of a stone pattern.

Example 4 By operating in the same manner as in Example 1, a sign plate having a relief layer obtained from the photosensitive resin layer was obtained. A screen printing machine (MT-Murakami Screen Co., Ltd.)
320) using polyester 200 mesh gauze
Layers having a pattern in which a PRT ink for screen printing obtained from Murakami Screen Co., Ltd. having a width of cm and indigo and dark blue were screen-printed alternately were laminated. The resulting photosensitive resin signboard was a signboard excellent in design and design with a background printed alternately in dark blue and blue.

[0031]

Industrial Applicability The photosensitive resin sign plate of the present invention having the above-described structure provides a photosensitive resin sign plate excellent in design by further laminating an image-bearing layer on the support side. It is a great contribution to the world.

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Claims (4)

[Claims] 1. A marker plate having a relief obtained from at least a photosensitive resin laminate having a support and a photosensitive resin layer, wherein a layer having an image is further laminated on the support. Photosensitive resin signboard. 2. The photosensitive resin signboard according to claim 1, wherein the layer having an image is a layer directly printed on the back surface of the support. 3. The photosensitive resin marker plate according to claim 1, wherein the ultraviolet ray absorbance at 400 nm of the photosensitive resin layer is 0.4 or less. 4. The photosensitive resin signboard according to claim 1, wherein the total light transmittance of the support is 60% or more.