JPH11103192A - Front plate for plasma display and plasma display arranged with front plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide plasma display having a screen excellent in visibility in which high electromagnetic wave shielding performance is exhibited stably while connecting the earth surely by exposing a part of a conductive mesh laminated on a transparent resin plate planarly at least to one side of the circumferential part on a front plate. SOLUTION: A conductive mesh 2a, i.e., a polyester plain gauze of 200×200 mm where the filament surface is plated and dyed, a transparent resin plate la, i.e., an acryl plate of 200×200 mm, and a soft acryl film 3a of 160×160 mm are arranged as shown on the drawing. Subsequently, they are sandwiched by stainless plates of 300×300 mm, mirror finished on the side touching the acryl resin plate 1a and the acryl film 3a, and hot pressed. Finally, it is cooled down to obtain a front plate where the conductive mesh 2a is embedded in the central 160×160 mm part of the polyester resin plate 1a and not embedded in the peripheral 20 mm part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front panel for a plasma display, which is installed on the front of a plasma display device and effectively shields electromagnetic waves generated from the plasma display.

[0002]

2. Description of the Related Art Various types of computer displays used in office automation equipment, factory automation equipment, etc., displays such as game consoles and televisions emit electromagnetic waves, and the effects on other equipment become a problem. ing.

Recently, a plasma display (hereinafter, referred to as a PDP) has been attracting attention as a large-sized display device, but the influence of electromagnetic waves generated therefrom, such as noise in FM broadcasts, is often observed.

Conventionally, as a method for shielding electromagnetic waves and removing such influences, for example, a filter for a display in which a conductive film such as indium oxide / tin oxide is formed on the surface of a plastic substrate (Japanese Patent Publication No. 19551
, A method in which a display is covered with a mesh of a fiber in which a nickel thin film is provided on the surface of a polyester fiber, and a method in which a filter having a thin metal wire introduced into a laminated glass is proposed.

[0005] However, a display filter formed with a conductive film such as indium oxide / tin oxide has a low performance of shielding electromagnetic waves, and cannot sufficiently shield electromagnetic waves. Particularly, for a display such as a PDP that generates strong electromagnetic waves, its shielding performance is not sufficient.

[0006] The method of covering a display with a fiber mesh in which a nickel thin film is provided on the surface of a polyester fiber has a drawback that dirt and dust tend to accumulate on the mesh and the screen is very difficult for a user to see. In the method using a filter with a thin metal wire introduced inside the laminated glass, the visibility of the screen has been considerably improved, but since the filter is sandwiched between the glass, it is very difficult to ground, Electromagnetic wave shielding performance cannot be sufficiently ensured for a long time.

[0007]

In view of such circumstances, the present inventors have conducted intensive studies on a front plate having electromagnetic wave shielding performance. As a result, the front plate is formed by laminating a conductive mesh on a transparent resin plate. At least one side of the peripheral portion on the surface of the front plate, the part of the conductive mesh is exposed in a plane, and the front plate for a plasma display has a reliable ground connection, and has a stable high electromagnetic wave shielding performance. The present invention has been found to be able to be exhibited and the screen to be easily viewable, and the present invention has been completed.

[0008]

That is, the present invention firstly provides a front plate having at least one transparent resin plate and a conductive mesh laminated on the transparent resin plate, A front plate for a plasma display is provided in which a part of the conductive mesh is exposed in a plane at least at one side of a peripheral portion on a surface of the front plate.

The present invention secondly provides the first front panel for a plasma display, wherein at least one surface of the front panel has irregularities.

[0010] Third, the present invention includes an intermediate synthetic resin plate laminated between the conductive mesh and the transparent resin plate, and further has a decorative portion provided between the intermediate synthetic resin plate and the transparent resin plate. And a first plasma display front panel.

Fourth, the present invention further comprises a conductive film,
The first front plate for a plasma display, wherein the conductive film is in a state of being in contact with the conductive mesh in a plane at least at one side of a peripheral portion on a surface of the front plate.

Fifth, the present invention provides the first front panel for a plasma display, wherein the transparent resin plate has near-infrared shielding performance.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. The drawings used in the description of the present invention are as follows. FIG. 1 is a layout diagram showing a configuration of a front panel for a plasma display in Example 1-a, and FIG.
FIG. 3A is a layout diagram illustrating a configuration of a front plate, FIG. 3 is a diagram illustrating a lamination configuration during hot pressing in Example 1-b,
FIG. 4 is a cross-sectional view showing the layer configuration of the front plate for a plasma display in Example 1-b, FIG. 5 is a diagram showing the lamination configuration during hot pressing in Example 2-b, and FIG.
FIG. 7 is a cross-sectional view illustrating a layer configuration of the front panel for plasma display in −b, FIG. 7 is a view illustrating a stack configuration during hot press processing in Example 3-b, and FIG. 8 is a front panel for plasma display in Example 3-b. FIG. 9 is a cross-sectional view illustrating a layered structure during hot pressing in Example 4-b. FIG. 10 is a cross-sectional view illustrating a layered structure of a front plate for a plasma display in Example 4-b. FIG. 11 is a view showing a laminated structure at the time of hot pressing in Example 5-b, FIG. 12 is a cross-sectional view showing a layer structure of a front plate for a plasma display in Example 5-b, and FIG. 13 is Example 1-c. FIG. 14 is a view showing a laminated structure at the time of hot press working, FIG. 14 is a cross-sectional view showing a layer structure of the front plate for a plasma display in Example 1-c, and FIG. 15 is a view at the time of hot press working in Example 2-c. product Diagram showing the configuration, Fig. 16 Example 2-
17C is a cross-sectional view illustrating a layer configuration of the front panel for plasma display in FIG. 17C, FIG. 17 is a diagram illustrating a stacked configuration during hot pressing in Example 3-c, and FIG. 18 is a front panel for plasma display in Example 3-c. 19 is a cross-sectional view illustrating a layer configuration during hot press working in Comparative Example 1-c, FIG. 20 is a cross-sectional view illustrating a layer configuration of a front plate in Comparative Example 1-c, and FIG. FIG. 22 is a top view showing the positional relationship between the transparent resin plate and the conductive film according to the present invention, FIG. 22 is a top view showing the positional relationship between the transparent resin plate and the conductive film according to the present invention, and FIG. FIG. 24 is a cross-sectional view showing the positional relationship with the film, FIG. 24 is a diagram showing the lamination structure at the time of hot pressing in Example 1-d, and FIG.
d is a cross-sectional view showing a layer configuration of the plasma display front panel, FIG. 26 is a diagram showing a laminated configuration at the time of hot pressing in Example 2-d, and FIG. 27 is a diagram of the plasma display front panel in Example 2-d. Sectional view showing a layer configuration,
FIG. 28 is a diagram showing a laminated structure at the time of hot pressing in Example 3-d, FIG. 29 is a cross-sectional view showing a layer structure of a front plate for a plasma display in Example 3-d, and FIG. 30 is a comparative example 1-d And FIG. 31 is a cross-sectional view showing a layer configuration of a front plate in Comparative Example 1-d.

The front plate of the present invention is a front plate obtained by laminating a conductive mesh on a transparent resin plate. It is a front plate for a plasma display that is exposed to the outside. Such front panels include CRTs, EL displays,
It is used by being installed on the front of a display device such as a plasma display. Particularly preferably, it is used as a front plate for PDP. The size of the front plate can be arbitrarily selected according to the screen size of the display device, and is not particularly limited. Also, the thickness can be arbitrarily selected.

The transparent resin plate in the present invention is made of, for example, an acrylic resin, a polycarbonate resin, a polyester resin, a cellulose resin such as triacetyl cellulose or diacetyl cellulose, a styrene resin, a resin such as a vinyl chloride resin. .

Specific examples include resins obtained by polymerizing the following monomers. (Meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate; bornyl (meth) acrylate, fentyl (meth) A) acrylate, 1-menthyl (meth) acrylate, adamantyl (meth) acrylate, dimethyladamantyl (meth) acrylate, cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, tricyclo [5.2.1.0
(6)] (Meth) acrylate esters having an alicyclic hydrocarbon group such as deca-8-yl (meth) acrylate and dicyclopentenyl (meth) acrylate; styrene, α-methylstyrene, vinyltoluenechlorostyrene, Styrene-based monomers such as bromostyrene; unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic acid, and itaconic acid; acid anhydrides such as maleic anhydride and itaconic anhydride; 2-hydroxyethyl (meth) acrylate; Hydroxyl group-containing monomers such as 2-hydroxypropyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate and monoglycerol (meth) acrylate; acrylamide, methacrylamide, acrylonitrile, methacrylonitrile, diacetone acrylamide, dimethyla Nitrogen-containing monomers such as noethyl methacrylate; epoxy-containing monomers such as allyl glycidyl ether, glycidyl acrylate, and glycidyl methacrylate; polyethylene glycol monomethacrylate, polypropylene glycol monomethacrylate, and polyethylene glycol monoallyl ether And other monomers such as vinyl acetate, vinyl chloride, vinylidene chloride, vinylidene fluoride, and ethylene.

Further, there may be mentioned resins obtained by polymerizing the following polyfunctional monomers, but the present invention is not limited to these resins. Alkyl diol di (meth) acrylates such as ethylene glycol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate; tetraethylene glycol di (meth) acrylate, tetra Alkylene glycol di (meth) acrylates such as propylene glycol diacrylate; aromatic polyfunctional compounds such as divinylbenzene and diallyl phthalate; (Meth) acrylates of polyhydric alcohols and the like. The (meth) acrylate described above indicates acrylate or methacrylate. The transparent resin plate of the present invention may be obtained by using two or more of the above monomers in combination.

The transparent resin plate according to the present invention has a light transmittance,
A resin made of an acrylic resin or a styrene resin is preferable from the viewpoint of availability of the monomer, and an acrylic resin is particularly preferable from the viewpoints of light transmittance and weather resistance.

The form of the transparent resin plate in the present invention may be plate-like, film-like, or sheet-like. The thickness can also be arbitrarily selected, but is usually 0.
It is from 0.01 to 10 mm, preferably from 0.02 to 5 mm. In the present invention, a plurality of these transparent resin plates may be used.

The transparent resin plate of the present invention comprises a light diffusing agent,
Coloring agents, release agents, stabilizers, ultraviolet absorbers, antioxidants,
It may contain additives such as an antistatic agent and a flame retardant.

The front plate of the present invention is a transparent resin plate.
When applied to P, it is preferable to have near-infrared shielding performance in order to prevent interference by near-infrared rays. As the transparent resin plate having near-infrared shielding performance used in the present invention, Japanese Industrial Standard (J
IS) In the measurement according to the method according to K7105A, the total light transmittance in the visible light region, which is in the wavelength range of 450 nm to 650 nm, is 50% or more, and the wavelength is 800 nm to 800 nm.
It is preferable to have a property of shielding near-infrared rays so that the light transmittance in the near-infrared range, which is in the range of 1000 nm, is 30% or less.

As the transparent resin plate having near-infrared shielding performance, a known resin plate containing a copper compound, a phosphorus compound, a tungsten compound or the like in a resin (Japanese Patent Laid-Open No. Sho 62-5190)
JP, JP-A-6-73197, JP-A-6-11
No. 8228, U.S. Pat. No. 3,647,729), a resin plate containing both a copper compound and a phosphorus compound, and a resin plate containing a dye-based near-infrared absorber.

Specific examples of the resin plate containing both a copper compound and a phosphorus compound include monomers having an unsaturated double bond,
Examples thereof include those comprising a copolymer obtained by copolymerizing a phosphorus atom-containing monomer and a resin composition containing a compound containing a copper atom.

Examples of the monomer having an unsaturated double bond include the same monomers as those exemplified above. The phosphorus atom-containing monomer is not particularly limited as long as it has a radically polymerizable unsaturated double bond in the molecule and has a phosphorus atom in the molecule. _{1) [CH 2 = C (} X) COO (Y) m] 3 -n-P (O) - (OH) n (1) ( wherein, n 1 or 2; X is a hydrogen atom or a methyl group; Y
Is an oxyalkylene group having 2 to 4 carbon atoms; m is a number average of 8 to 20 when Y is an oxyalkylene group having 2 carbon atoms;
When Y is an oxyalkylene group having 3 carbon atoms, the number average is 5;
-20, and when Y is an oxyalkylene group having 4 carbon atoms, the number average is 4 to 20), and the resulting resin plate has high strength and excellent durability, and is preferred.

In the general formula (1), as the alkylene oxide group for Y, a propylene oxide group having 3 carbon atoms is preferable because the hygroscopicity of the obtained resin plate is reduced. Preferably, the total number of carbon atoms of the [CH ₂ ＣC (X) COO (Y) _m ] group is at least 20 in number average. When the total number of carbon atoms of R is 18 or less, the strength of the obtained resin plate tends to decrease and the hygroscopicity tends to increase. In particular, Y is a propylene oxide group having 3 carbon atoms and m is 6 to
Twenty phosphorus atom-containing monomers are preferably used.

The amount of the phosphorus atom-containing monomer used is 0.1 to 50% by weight, preferably 0 to 50% by weight in the copolymer of the monomer having an unsaturated double bond and the phosphorus atom-containing monomer. .5-
30% by weight. When the content of the phosphorus atom-containing monomer is 0.
If it is less than 1% by weight, it is difficult to obtain good near-infrared absorbing power. On the other hand, if it exceeds 50% by weight, the strength of the obtained copolymer decreases, which is not preferable.

It should be noted that two or more phosphorus atom-containing monomers can be used in combination. Copolymers obtained by copolymerizing a monomer having an unsaturated double bond and a phosphorus atom-containing monomer can be obtained by polymerizing these monomers by well-known polymerization methods such as bulk polymerization, suspension polymerization, and emulsion polymerization. Obtained by

The compound containing a copper atom is not particularly limited as long as it contains a copper atom, and various compounds can be used. For example, copper acetate, copper formate, copper propionate, copper valerate, copper hexanoate, copper octylate, copper decanoate, copper laurate, copper stearate, copper 2-ethylhexanoate, copper naphthenate, copper benzoate , A salt of a carboxylic acid such as copper citrate and a copper ion, a complex salt of acetylacetone or acetoacetic acid and a copper ion, copper chloride, copper pyrophosphate and the like can be used.

The amount of the compound containing a copper atom is from 0.01 to 100 parts by weight based on 100 parts by weight of a copolymer obtained by copolymerizing a monomer having an unsaturated double bond and a phosphorus atom-containing monomer. 3
0 parts by weight, more preferably 0.1 to 20 parts by weight.
This corresponds to approximately 0.05 to 10 mol of the phosphorus atom-containing monomer per 1 mol of the copper atom-containing compound.

As a method for preparing the above resin composition,
A copper atom is contained in a mixture of a monomer having an unsaturated double bond and a phosphorus atom-containing monomer, or a so-called syrup containing a polymer or a copolymer composed of the monomer together with the monomer. There is a method of uniformly dissolving the compound and polymerizing and curing it in a cell or a mold to form a predetermined shape, or a method of bulk polymerization.

The polymerization at this time is carried out, for example, by a method in the presence of a known radical polymerization initiator or a so-called redox-based initiator comprising a radical polymerization initiator and an accelerator, irradiation of ultraviolet rays or radiation. It can be performed by a well-known method such as a method of performing the above.

A compound containing a copper atom is uniformly mixed with a powdery copolymer of a monomer having an unsaturated double bond and a monomer containing a phosphorus atom by a well-known melt-kneading method, followed by polymerization. For example, any method may be used as long as polymerization can be performed after uniform mixing.

Specific examples of the dye-based near-infrared absorber in the resin plate containing the dye-based near-infrared absorber include the following. (1) JP-A-4-174402, JP-A-4-16
No. 0037, an aminium-based near-infrared absorber, (2) JP-A-61-115958, JP-A-61-291651, and JP-A-62-132963.
And Japanese Patent Laid-Open Publication No. 1-172458 (US Pat.
42,974), an anthraquinone-based near-infrared absorber, (3) JP-A-2-138382 (US
P5,024,926), JP-A-3-62878 (USP 5,124,067), JP-A-5-16344
No. 0, JP-A-6-214113, phthalocyanine and naphthalocyanine-based near-infrared absorbers, (4) JP-A-61-277903 and JP-A-6-214903.
JP-A-1-57674, JP-A-62-158779, JP-A-63-139303 (US Pat.
3,846), JP-A-1-114801, and JP-B-4-45547 (US Pat. No. 4,730,902), dithiol complex-based near-infrared absorbers, (5)
Polymethine-based absorbent, pyrylium-based absorbent, thiopyrylium-based absorbent, squararium-based absorbent, croconium-based absorbent, azulenium-based absorbent, tetradehydrocholine-based absorbent, triphenylmethane-based absorbent, diimmonium-based absorbent Such. The dye-based near-infrared absorbers may be used in combination of two or more.

More specifically, examples of the dye-based near-infrared absorber include (1) IR-7 manufactured by Nippon Kayaku Co., Ltd.
50, IRG-002, IRG-003, IRG-02
2, IRG-023, IRG-820, CY-2, CY
-4, CY-9, CY-20, (2) PA-001, PA-1005, PA-10 manufactured by Mitsui Toatsu Chemicals, Inc.
06, SIR-114, SIR-128, SIR-13
0, SIR-159, (3) IRF-700, IRF-770, IRF-80 manufactured by Fuji Photo Film Co., Ltd.
0, IRF-905, IRF-1170, (4) EEX Color 802K and EEX Color 803K manufactured by Nippon Shokubai Co., Ltd., but are not limited thereto.

The content of the dye-based near-infrared absorber in the resin plate containing the dye-based near-infrared absorber is appropriately adjusted. For example, when an acrylic resin plate having a thickness of 3 mm is obtained, an acrylic resin plate may be used. Usually 0.0
001 to 0.2 parts by weight, preferably 0.001 to 0.1
Parts by weight.

As a method for obtaining a resin plate containing a dye-based near-infrared absorbent in the present invention, the following method can be mentioned. (1) A method in which a dye-based near-infrared absorber is melt-kneaded into a transparent resin and molded. (2) A method in which a dye-based near-infrared absorbing dye is dissolved and dispersed in a monomer component as a raw material of a transparent resin, and then polymerized. (3) A method of forming a resin layer containing a dye-based near-infrared absorbing dye on the surface of a transparent resin sheet or film by coating or the like. (4) A method of laminating and laminating a sheet or film containing the near-infrared absorbing dye obtained by the above-mentioned method (1) to (3) on a transparent resin sheet.

(1) When a method of melting and kneading a dye-based near-infrared absorber into a transparent resin and molding is used, a known extrusion molding method, injection molding method, or press molding method is performed at a temperature suitable for the transparent resin to be used. A transparent substrate containing a dye-based near-infrared absorber is produced by adding a dye-based near-infrared absorber when molding a transparent resin by, for example, such a method.

(2) When a method of dissolving and dispersing a dye-based near-infrared absorbing dye in a monomer component serving as a raw material for a transparent resin and then polymerizing the same, a monomer component serving as a raw material for a transparent resin is used. Alternatively, in a so-called syrup containing a monomer and its polymer, a dye-based near-infrared absorber is dissolved and dispersed, and bulk polymerization,
For example, a transparent substrate containing a dye-based near-infrared absorber is produced by polymerizing and curing in a cell or a mold and shaping into a predetermined shape.

(3) When a method of forming a resin layer containing a dye-based near-infrared absorbing dye on the surface of a transparent resin sheet or film by coating or the like is used, the transparent resin and the dye are coated on the surface of the transparent resin sheet or film. A solution in which a system-based near-infrared absorber is dissolved in an appropriate solvent is applied, and the solvent is volatilized to produce a transparent substrate containing a dye-based near-infrared absorber.

(4) When using a method of laminating a sheet or film containing the near-infrared absorbing dye obtained by the above-mentioned method (1) to (3) on a transparent resin sheet, The sheet or film containing the near-infrared absorbing dye obtained by the above-mentioned method (1) to (3) is laminated on a transparent resin sheet not containing Melt and laminate by

The transparent resin plate of the present invention may have a hard coat layer on the surface. The hard coat layer is not particularly limited, for example, acrylic-based, urethane-based hard coat agent cured by ultraviolet light,
Heat-cured products and the like can be mentioned.

The front plate for a plasma display of the present invention is obtained by laminating a conductive mesh on a transparent resin plate. Examples thereof include a metal mesh having a surface plated with nickel, chromium, or the like, and a synthetic fiber mesh having a filament surface of a synthetic fiber plated with nickel, copper, or the like. The type of the synthetic fiber in the synthetic fiber mesh is not particularly limited, but polyester fiber is preferable from the viewpoint of strength, durability, and ease of etching which is a pretreatment for plating.

The fiber diameter of the conductive mesh in the present invention is usually 10 to 60 μm. When the mesh is coarse, the electromagnetic wave shielding performance is reduced. On the other hand, when the mesh is fine, the image is difficult to see. Therefore, the mesh size (value expressed by the number of cells per inch) is usually in the range of 40 to 300, preferably 60 to 300. The range is 200 mesh. The thickness of the mesh is usually in the range of 20 to 200 μm, preferably 50 to 200 μm.
The range is 100 μm.

The conductive mesh whose surface is treated to be black or dark with a conductive paint, plating, a dye or a pigment or the like is effective in suppressing flickering and glare of an image, and is preferable.

In the present invention, the conductive mesh is exposed in a plane at least on one side of a peripheral portion on the surface of the transparent resin plate. By taking ground from such an exposed portion, electromagnetic waves can be shielded very effectively. In addition, since reliable grounding is possible, electromagnetic wave shielding performance does not decrease due to insufficient ground connection due to shaking of the ground wire, etc., and stable electromagnetic wave shielding performance can be obtained for a long time. it can.

To expose the conductive mesh on the surface,
For example, when obtaining a front plate in which a conductive mesh is laminated between two transparent resin plates, one transparent resin plate may be laminated with an area smaller than that of the conductive mesh.
The other transparent resin plate may have the same size as the conductive mesh, or may have a larger area. Alternatively, one of the transparent resin plates may be shifted and stacked with respect to the conductive mesh.

The exposed portion of the conductive mesh may be provided on one side of the front plate, or may be provided on two or more sides, but it is preferable that the exposed portion is exposed in a planar manner on all four sides. The exposed portion may be exposed on the observation surface side of the front plate, or may be exposed on the opposite side of the PDP.

The front plate of the present invention includes, for example, a transparent resin plate,
The conductive mesh and another transparent resin plate are superposed in this order, and they can be easily manufactured by a method of heating and pressing them. The heating temperature is usually 110 to
A pressure of about 180 ° C. and a pressure of usually 10 to 60 kg / cm ²
It is about.

In order to improve the adhesiveness between the transparent resin plate and the conductive mesh, between the transparent resin plate and another transparent resin plate to be further laminated, etc. In order to prevent deformation such as mesh deterioration and mesh expansion that cause a decrease in electromagnetic wave shielding performance when pressing and integrating, a soft transparent thermoplastic film is laminated between them as an adhesive film and heated, Pressure may be applied. In order to obtain the effect of improving the adhesiveness between the transparent resin plate and the conductive mesh, the transparent resin plate, the conductive mesh, and the adhesive film may be laminated and processed in this order, The transparent resin plate, the bonding film and the conductive mesh may be laminated and processed in this order, or the transparent resin plate, the bonding film, the conductive mesh and the bonding film may be laminated in this order. May be processed. As the soft transparent thermoplastic film (adhesive film), a highly transparent low softening point resin film is used, and the softening point of the film is usually about 40 to 40, which is the Vicat softening point measured by the method described in JIS K7206.
100 ° C., preferably about 50-80 ° C. Specifically, for example, an acrylic film, a vinyl chloride film and the like can be mentioned. The film thickness is usually about 10
It is 200 μm, preferably about 20-100 μm.

The front plate for a plasma display of the present invention is obtained by laminating a conductive mesh on a transparent resin plate. Provided. Such an anti-reflection layer,
The contamination prevention layer and the hard coat layer can be provided at arbitrary positions on the front panel for a plasma display of the present invention.

The anti-reflection layer is provided for improving the visibility. As the anti-reflection layer, low refractive index substances such as magnesium fluoride and silicon oxide, titanium oxide, tantalum oxide, tin oxide, Indium oxide, zirconium oxide,
Multi-layer anti-reflective coating in combination with high-refractive index substance such as zinc oxide, single-layer anti-reflective coating mainly composed of low-refractive index substance Are formed. From the viewpoint of durability against a temperature change due to heat from the display screen, a three-layer structure of aluminum oxide, magnesium fluoride, and silicon oxide is preferable. From the viewpoints of antireflection effect, surface hardness, adhesion, and economy, a multilayer film composed of a layer composed of indium oxide and tin oxide (ITO layer) and a layer composed of silicon oxide, a multilayer film composed of silicon oxide and titanium oxide Among them, a multilayer film composed of silicon oxide and titanium oxide is also preferable because of its excellent transparency.

The antireflection layer may be formed directly on the transparent resin plate by a known method such as coating, vacuum deposition, sputtering, ion plating, or a transparent film having an antireflection layer formed on the surface. It may be formed by laminating or pasting on a transparent resin plate. The antireflection layer may be provided on one side of the front plate in the present invention, or may be provided on both sides. Preferably, it is provided on both sides.

When an anti-reflection layer is provided, dirt due to hand marks, fingerprints, cosmetics, etc. is apt to adhere. A contamination prevention layer may be formed thereon.

The contamination preventing layer may be a known one and is not particularly limited. For example, JP-A-3-266801, JP-B-6-29332, and JP-A-6-256.
756, JP-A-1-294709 (USP)
5,081,192) and the like, and a contamination prevention layer comprising a fluorine- or siloxane-containing compound. The contamination prevention layer may be formed directly on the transparent resin plate, or may be formed by laminating or laminating a transparent film or the like having a surface on which the contamination prevention layer is formed, on the transparent resin plate. Further, the contamination prevention layer may be provided on one surface of the front plate in the present invention, or may be provided on both surfaces.

The hard coat layer is provided for the purpose of increasing the hardness of the front plate. As the hard coat layer, a known hard coat layer may be used, for example, a coat containing a polyfunctional monomer as a main component. A cured film obtained by polymerizing and curing the agent can be used. Specifically, a polyfunctional polymerizable compound containing two or more acryloyl groups or methacryloyl groups such as urethane (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate is activated with ultraviolet rays, electron beams, or the like. Examples include a layer polymerized and cured by energy rays; and a layer obtained by crosslinking and curing a silicone-based, melamine-based, or epoxy-based crosslinkable resin material by heat. Among them, a layer obtained by polymerizing and curing a urethane acrylate-based polyfunctional polymerizable compound and a layer obtained by crosslinking and curing a silicon-based crosslinkable resin material are preferable in terms of durability and ease of handling.

As a method for forming a hard coat layer, for example, a coating agent comprising the above compound is used in a method used in a usual coating operation, that is, a spin coating method, a dip coating method, a roll coating method, a gravure coating method. Method, a curtain flow coating method, a bar coating method and the like, and a method of curing the coating. At this time, the coating agent may be diluted with various solvents before coating in order to facilitate the coating and to adjust the thickness of the coated film. The applied coating agent can be cured by a method in which thermal polymerization is performed by heating and heating, or a method in which photopolymerization is performed by irradiation with an active energy ray such as an ultraviolet ray or an electron beam.

The thickness of the hard coat layer is not particularly limited, but is preferably 1 to 20 μm. 1 μm
If the thickness is thinner, an interference pattern of light appears due to the influence of the upper antireflection layer, which tends to be unfavorable in appearance.
If it exceeds 0 μm, the coating tends to be unfavorable in terms of strength, such as cracks in the coating film.

In order to improve the adhesion between the transparent resin plate or the like and the hard coat layer, the above-mentioned adhesive film may be provided between the transparent resin plate or the like and the hard coat layer.

The hard coat layer may be formed directly on the transparent resin plate, or may be formed by laminating or laminating a transparent film or the like having a hard coat layer formed on the surface on the transparent resin plate. Is also good. Further, the hard coat layer may be provided on one side of the front plate in the present invention,
It may be provided on both sides.

In the front plate for a plasma display of the present invention, it is preferable that at least one surface has irregularities, and the irregularities are usually formed on the surface of the front plate facing the PDP side. May be formed on the surface on the opposite observer side, or may be formed on both surfaces thereof.

The irregularities may be formed directly on the transparent resin plate or may be formed on the hard coat layer provided in advance. In the latter case, the mechanical strength of the irregularities, scratch resistance, etc. are improved. Is preferred. In addition, those in which the irregularities are formed on one surface and a hard coat layer is formed on the other surface can also be mentioned as preferable ones.

The irregularities may be, for example, irregularities transferred from a transfer mold, or may be silicon dioxide (silica gel or the like), aluminum oxide, magnesium oxide, tin oxide, or the like.
The unevenness may be formed by a method of applying a coating containing inorganic compound particles such as zirconium oxide and titanium oxide and drying the coating. It is preferable that the irregularities be transferred from the transfer mold, since the irregularities can be formed by using the transfer mold together with heating and pressurization in the front plate manufacturing process, which is simple and has a good yield.

Examples of the transfer mold include a mold used for heating and pressurizing, and a film having irregularities on its surface. When a mold is used, it is preferable that a mold release accelerator or the like is previously applied to the transfer surface of the mold. It is preferable to use a film or the like having a surface with irregularities, in that the front panel can be easily taken out after heating and pressurization and the handling is easy.

The film is not particularly limited as long as it can withstand heat and pressure. Examples thereof include a polyethylene terephthalate (PET) film and a triacetyl cellulose (TAC) film. Films are preferred. The thickness of the film is not particularly limited, but is usually 20 μm or more in terms of ease of handling, and usually 500 μm or less in terms of price,
Preferably it is 30 to 300 μm.

On the surface of the film, irregularities corresponding to the intended irregularities of the front plate are formed. The irregularities on the surface of the film may be formed by embossing, or may be formed by dispersing a filler in the film. preferable.

In order to form the unevenness on the front plate using the film, for example, the surface of the transparent resin plate or the like on which the unevenness is to be formed is placed in contact with the unevenness of the film and placed thereon. Heating and pressurization as described above. Thereafter, by removing the film, it is possible to obtain a front plate having an uneven surface. Further, the film may be collected and reused.

According to the definition of JIS B0601, it is preferable that the irregularities have an average interval of 3 to 500 μm and a ten-point average roughness of 1 to 20 μm. Note that the average interval of the unevenness is a value represented by an arithmetic average value of the average line length corresponding to one peak (convex portion) and a valley (concave portion) adjacent thereto at a reference length. The ten-point average roughness is defined as the average of the absolute values of the altitudes of the peaks having the height from the highest peak to the fifth height and the height of the lowest valley from the bottom to the fifth height. This is a value represented by the sum of the absolute value of the bottom altitude and the average value.

In the present invention, it is preferable that the conductive mesh has a depth of 0.5 mm or less from one of the surfaces of the front plate in that the warpage of the front plate can be reduced.

The front plate for a plasma display of the present invention has a surface resistance of 10 ¹¹ Ω / □ or less.
This is preferable in that dust adhesion can be reduced. Examples of the method for obtaining such a surface resistance include a method of applying a nonionic, anionic, or cationic surfactant to the surface and drying the same, and mainly containing a metal oxide such as tin oxide, indium oxide, and antimony oxide. A method of applying a paint containing a conductive filler to the surface, a method of forming an ITO (mixture of tin oxide and indium oxide) layer on the surface by a vacuum process such as sputtering or vapor deposition, or a conductive polymer such as polythiophene, polypyrrole, or polyacetylene. On the surface.

The front plate for a plasma display of the present invention is a front plate formed by laminating a conductive mesh on a transparent resin plate. When a decorative portion is provided, the color of the decorative portion is ensured. In order to improve the appearance, it is preferable that an intermediate synthetic resin plate is laminated between the conductive mesh and the transparent resin plate, and a decorative portion is provided between the intermediate synthetic resin plate and the transparent resin plate.

As the intermediate synthetic resin plate, the same one as described above as the transparent resin plate can be used. Further, using a plurality of transparent resin plates, for example, using three sheets of a display-side synthetic resin plate, an intermediate synthetic resin plate, and an observer-side synthetic resin plate (all the same as those described above as the transparent resin plates) It may be formed by laminating an observer-side synthetic resin plate, an intermediate synthetic resin plate, a conductive mesh, and a display-side synthetic resin plate in this order.

Here, the display-side synthetic resin plate, the intermediate synthetic resin plate, and the observer-side synthetic resin plate may be the same or different from each other, and may be appropriately selected according to the purpose. For example, a transparent resin plate having near-infrared shielding performance, a transparent resin plate having a relatively small visible light transmittance, such as a colored transparent resin plate, is preferably used as an intermediate synthetic resin plate or a display-side synthetic resin plate.

In the case where the decorative portion is provided, the exposed portion of the conductive mesh may be exposed on the observer side of the front plate, or may be exposed on the display side opposite thereto.
Such an exposed portion can be easily covered and hidden by the decorative portion.

The method for providing the decorative portion is not particularly limited, and a decorative member such as a decorated transparent resin plate may be used. It is preferable in terms of mass productivity that such a decorative portion is provided by printing on the surface of the intermediate synthetic resin plate and / or the observer side synthetic resin plate. It is also preferable to provide another transparent resin plate which has been decorated by printing or the like by laminating it. Although the color of the decorative portion is not particularly limited, for example, by providing a black background on the decorative portion and providing characters such as a logo in white, a firm impression can be given to the display screen. Examples of the paint used when providing the decorative portion by printing include acrylic paint, urethane-based paint, epoxy-based paint, and the like.For example, when the decorative portion is provided by printing using an acrylic resin plate as a transparent resin plate, Use of an acrylic paint or the like is preferable because sufficient adhesion of the decorative portion can be ensured.

The decorative portion may be provided on one or both of the intermediate synthetic resin plate and the observer side synthetic resin plate. Further, another transparent resin plate may be further laminated on the display-side surface of the display-side synthetic resin plate or the observer-side surface of the observer-side synthetic resin plate.

In the case where the decorative portion is provided on the front plate for a plasma display of the present invention, it is preferable that at least one surface of the front plate is provided with irregularities by the same method as described above. Such irregularities can reduce the reflection of external light when formed on the surface on the observer side, and when provided on the display side, almost eliminate Newton rings even in contact with the display screen. Both are preferred because they do not occur.

The method of manufacturing the front plate provided with the decorative portion is the same as described above. Specifically, for example, the observer side synthetic resin plate, the intermediate synthetic resin plate and the conductive mesh are superposed in this order. These can be easily manufactured by a method of heating and pressurizing them. When laminating the display-side synthetic resin plate, the observer-side synthetic resin plate, the intermediate synthetic resin plate, the conductive mesh, and the display-side synthetic resin plate are laminated in this order, and then these are combined in the same manner as described above. Then, heating and pressing may be performed. The decorative portion may be provided in advance on the observer side synthetic resin plate and / or the intermediate synthetic resin plate by a method such as printing, or another decorative resin plate decorated by printing or the like may be used as an intermediate synthetic resin plate. After being inserted between the observer-side synthetic resin plate, it may be provided by heating and pressing. When a conductive film is provided, for example, as shown in FIG. 4C, the intermediate synthetic resin plate, the conductive mesh, the conductive film, and the display-side synthetic resin plate are heated and heated in a stacked state in this order. You only have to press. Such a conductive film can be easily covered and hidden by providing the decorative portion. In order to improve the adhesion between the intermediate synthetic resin plate or the display-side synthetic resin plate and the conductive mesh or the conductive plate, and to laminate them more firmly, insert an adhesive film between the two resin plates and overlap them. It may be combined, heated and pressurized. As the adhesive film, the same one as described above is used.

When the front panel for a plasma display of the present invention is used, the conductive mesh is usually set to the ground potential. For this purpose, the conductive mesh must be in contact with the ground potential portion of the display or the like. Preferably, such a ground potential is generally secured by contacting an exposed portion provided by exposing a part of the conductive mesh with a ground potential portion of the display.

Further, the conductive film may be provided in a state of being in electrical contact with the conductive mesh, and the conductive mesh may be brought into the ground potential by contacting the conductive film with the ground potential portion of the display. . At this time, the conductive mesh and the conductive film are arranged and laminated between the two transparent resin plates.

As the conductive film, those having excellent conductivity are generally used. For example, copper, aluminum, silver, and these
More than one kind of alloy, a metal film made of stainless steel or the like is preferable.

The thickness of the conductive film is usually 0.5 to 500 μm, preferably 1 to 500 μm, in view of mechanical strength and ease of processing.
２００200 μm.

In the case of providing such a conductive film, the conductive film needs to be in contact with the conductive mesh. As described above, the conductive film and the conductive mesh usually overlap each other so as to be in contact with each other. Deploy. The positional relationship between the conductive film and the conductive mesh is not particularly limited as long as they overlap each other, and the conductive film may be arranged in contact with any surface of the conductive mesh surface.

In the front plate for a plasma display of the present invention, it is preferable that the conductive mesh and the conductive film are arranged so as to be in planar contact with the exposed portion of the conductive mesh provided around the front plate. At this time, the conductive film may be provided only on one side of the front plate, or may be provided on two or more sides. From the viewpoint of the electromagnetic wave shielding performance, it is preferable to be provided on all four sides.

The overlapping width of the conductive film and the conductive mesh is
From the viewpoint of electromagnetic wave shielding performance and durability, it can be said that it is usually 1 mm or more, preferably about 2 to 50 mm. In the case where the conductive mesh is laminated between the two transparent resin plates, it is preferable that the conductive mesh is provided with holes, since the conductive mesh is firmly laminated between the transparent resin plates.

[0084] Here pores over substantially the entire surface of the conductive film, it is preferable that provided by substantially uniformly distributed, the area of one hole, usually 100 mm ² or less, preferably 0.1mm ² ~50mm ² The total area of the holes is usually about 0.1% to 50%, preferably about 0.5% to 40% of the total area of the conductive film.

It is preferable to use a conductive film having one surface coated with an adhesive since the conductive film and the transparent resin plate can be firmly fixed. Here, the type of the adhesive is not particularly limited, but an adhesive having a thermoplastic property is preferable because the applicable range of the pressing conditions is wide.

When a conductive film is provided, for example, a portion that is exposed from the front plate is provided in the conductive film, and the exposed portion is connected to a ground wire or a ground electrode. It is preferable because it can be easily set to the ground potential.

As a method of exposing the conductive film, a portion of the conductive film may be exposed by cutting out a part of the transparent resin plate. The exposed portion is, as shown in FIG. Alternatively, it may protrude from the transparent resin plate along the side of the front plate, or may protrude from a side orthogonal to the side where the conductive film is provided, as shown in FIG. Further, as shown in FIG. 23, the conductive film may be exposed in one surface of the front plate. In this case, the exposed portion can be easily provided, which is preferable. Any of these exposed portions can be provided by appropriately selecting the size, arrangement place, shape, and the like of the synthetic resin plate or conductive film to be used. (Note that, in FIGS. 21, 22 and 23, components other than the conductive film and the synthetic resin plate are omitted to show the relationship between the exposed portion of the conductive film and the shape of the front plate. )

As described above, when an exposed portion is provided in the conductive film, the exposed portion may be exposed on the observation surface side of the front plate, or may be exposed on the display side opposite thereto. May be. In the exposed part,
As described above, only the conductive film may be exposed, as shown in FIG. It may be exposed in the same plane of the face plate. Further, the exposed portion may be overlaid on the surface of one surface of the front plate, or when a plurality of transparent resin plates are stacked on the front plate, as shown in FIG. 29, It may be folded and laminated between these transparent resin plates.

Thus, the front plate for a plasma display of the present invention can be obtained. The front plate is subjected to edge treatment (trimming) such as cutting around the front plate, and the front plate is adjusted to a predetermined size. You may be. in this case,
It is preferable that the conductive mesh and the conductive film are easily trimmed to a predetermined size without cutting off the exposed portions.

The front panel for a plasma display of the present invention has a metal thin film of silver, copper, gold, chromium, stainless steel, nickel or the like on its surface in a thickness that does not hinder transparency in order to further improve near-infrared shielding performance. It can also be provided.

[0091]

The front panel for a plasma display of the present invention has a reliable grounding, and can exhibit electromagnetic wave shielding performance more stably than conventional ones. Further, the present invention provides a front panel for a plasma display having excellent visibility by providing irregularities on its surface and imparting anti-reflection performance, scratch resistance, and stain resistance. Further, by using a transparent resin plate having near-infrared ray shielding performance, a front plate that effectively shields near-infrared rays is provided.

Further, in the present invention, the front panel for a plasma display, which has a small warpage and less occurrence of Newton rings, the front panel for a plasma display, in which the color of the decorative portion is ensured, and the durability and stability of the ground are excellent. Thus, a front panel for a plasma display can be obtained.

[0093]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the present invention. The measurement and evaluation of physical properties were performed by the following methods.

1) Total light transmittance in the visible light region: The total light transmittance in the visible light region was measured using a haze computer type HGM-2DP manufactured by Suga Test Instruments.

2) Light transmittance at a wavelength of 800 nm to 1000 nm: The light transmittance at a wavelength of 800 nm to 1000 nm was measured using a self-recording spectrophotometer type 330 manufactured by Hitachi, Ltd.

3) Visibility: The obtained front panel for plasma display was attached to the front of the plasma display device, and the images were visually observed through the transparent panel, and the difference in color and outline of the image before and after the attachment was confirmed.

4) Electromagnetic wave shielding performance: Electromagnetic wave intensity was measured using a shield material evaluation system R2547 (manufactured by Advantest Co., Ltd.), and the electromagnetic wave shielding performance of the obtained front panel for plasma display was calculated by the following equation.
The larger the value is, the higher the electromagnetic wave shielding performance of the obtained plasma display front panel is. Electromagnetic wave shielding performance (dB) = 20 × Log ₁₀ (X0 /
X) (X0: electromagnetic wave intensity when the front panel for plasma display is not installed, X: electromagnetic wave intensity when the front panel for plasma display is installed) Also, in the evaluation by the same system, the number of rotations of the handle is the front panel for plasma display. It corresponds to the pressure (degree of fixation) required for tightening and fixing the handlebar, and the smaller the handle rotation speed, the more difficult it is to exert the shielding performance of the front panel.

5) Remote control test: The obtained front panel for plasma display was installed in front of the remote control light-receiving section of a home television (TV), and a signal in the near infrared region (3 m) was received from a remote controller 3 m away. (Signal wavelength: 950 nm) to check whether the TV responds. If it does not respond to a signal in this test, the installed front panel can prevent a failure due to near infrared rays generated from a display device such as a PDP.

6) Warp: The warp [D (cm)] is the distance [A ( cm)], and was calculated from the following formula D = A × (1 / S) ^1/2 using the area [S (cm ² )] of the front plate.

Example 1-a A conductive mesh 2a having a size of 200 × 200 mm
60μm thick, weave density 140 mesh / inch, filament surface after copper and nickel plating,
Black dyed polyester fabric (made by Seiren Co., Ltd.)
And a size of 200 × 200 m as the transparent resin plate 1a
m, 4 mm thick acrylic plate (SUMIPEX 000 manufactured by Sumitomo Chemical Co., Ltd.), and further 160 × 1 in size
Soft acrylic film 3a having a thickness of 60 mm and a thickness of 20 μm
(Trade name Sanjuren SD003 Kanegafuchi Chemical Industry Co., Ltd.)
1), and arranged above and below these,
A 300 mm x 300 mm, 2 mm thick stainless steel lining plate having a mirror-finished side in contact with the acryl resin plate 1 a and the acryl film 3 a is applied thereto. The laminate was integrated by heating and pressing at a temperature of 140 ° C. and a press pressure of 40 kg / cm ² for 10 minutes. After cooling, the stainless steel backing plate was removed, and a conductive mesh 2a made of polyester fabric was placed in the center of the acrylic resin plate 1a at 160 × 1.
A front plate embedded in a 60 mm portion and not having a 20 mm peripheral portion was obtained. When the front panel was attached to a plasma display and observed, the visibility was good. In this front plate, since the conductive mesh 2a (polyester fabric) protruded from the plane of the peripheral portion, grounding was possible from the mesh portion as it was. Using this front plate, the electromagnetic wave shielding performance was evaluated based on the change in the electromagnetic wave shielding performance corresponding to the rotation speed of the sample fixed handle of the above-mentioned shielding material evaluation system. The results are shown in Table 1. The handle was completely closed three times. The electromagnetic wave shielding performance of this front panel was extremely stable and excellent.

Example 2-a 90% by weight of methyl methacrylate, CH ₂ ＣC (C
_{H 3) COO [CH 2 CH} (CH 3) O] 5.5 -P
Phosphorus atom-containing monomer 10 represented by (O) — (OH) ₂
5 parts by weight of benzoic anhydride and 1 part by weight of t-butylperoxy-2-ethylhexanoate as a radical initiator were dissolved in 100 parts by weight of the monomer mixture consisting of 100% by weight.
Add this solution to a PVC gasket and size 22
Pour into a polymerization cell consisting of two glass plates of 0 mm × 220 mm and 10 mm in thickness, and at 100 ° C. for 12 hours at 55 ° C.
And heat polymerization for 2 hours, size 200mm x 200m
m, a transparent resin plate having a thickness of 3 mm was produced. The total light transmittance of this transparent resin plate in the visible light region is 85%, 800 nm or more.
The light transmittance at 1000 nm was 12% or less. Using this transparent resin plate, a front panel was obtained in the same manner as in Example 1, in which the polyester fabric was embedded in the center of the resin plate and not embedded in the peripheral flat surface. When the front panel was attached to a plasma display and observed, the visibility was good. This front panel was completely grounded as in Example 1-a. In the remote control test, TV did not react.

Comparative Example 1-a The filament surface having a size of 230 × 230 mm, a thickness of 60 μm and a weave density of 140 mesh / inch was made of copper /
Nickel-plated, black-dyed polyester fabric 5a (manufactured by Seiren Co., Ltd.), size 250 × 250 m
m, 2 mm thick acrylic plate 4a (Sumipex 000
Sumitomo Chemical Co., Ltd.), 250 x 250 m
2 and a soft acrylic film 6a (trade name: Sanjuren SD003, manufactured by Kanebuchi Chemical Industry Co., Ltd.) having a thickness of 20 μm are arranged as shown in FIG. Done, size 3
A stainless steel backing plate having a size of 00 × 300 mm and a thickness of 2 mm was applied, and in this state, they were loaded into a 50-ton hydraulic press, and the press temperature was 140 ° C. and the press pressure was 40 kg /.
The layers were integrated by heating and pressing at 10 cm ² for 10 minutes.
After cooling, the stainless steel backing plate was removed to prepare a front plate in which polyester fabric was completely embedded in the center of the acrylic resin. Cut the four sides of the front panel so that the polyester fabric appears on the four side edges (sides) of the front panel,
A front plate having a size of 200 × 200 mm and a thickness of 4 mm was obtained. The front plate had a conductive portion (polyester fabric) protruding linearly at an end, and it was extremely difficult to take a ground.
Using this front plate, the electromagnetic wave shielding performance was evaluated based on the change in the electromagnetic wave shielding performance corresponding to the rotation speed of the sample fixed handle of the above-mentioned shielding material evaluation system. The results are shown in Table 1. This front plate could not be sufficiently grounded, and its electromagnetic wave shielding performance was not stable because the deflection was large depending on the degree of fixing and the wavelength.

[0103]

[Table 1]

Example 1-b As shown in FIG. 3, an acrylic resin MMA plate having a near-infrared shielding function (hereinafter referred to as an MMA plate) was placed on a stainless steel (SUS) mirror surface pressing plate 1b (mirror surface turned up). 3b with the hard coat surface 2b facing down, and the conductive mesh 41b and the acrylic film
b, an acrylic film 6b, a non-glare polyethylene terephthalate film (hereinafter, referred to as a non-glare PET film) 8b (a non-glare surface 72b is placed down) in this order, and a mirror-surface press plate is further placed on the mirror-surface side. I set it down. 130 ° C in this state
After heating and applying a pressure of 40 kg / cm ² for 20 minutes, the transfer-type non-glare PET film 8b is removed, and the unevenness on the surface of the non-glare PET film 8b as shown in FIG. A front plate transferred to the top was prepared. The MMA plate 3b is a cast plate having a thickness of 3 mm having a near-infrared shielding function, and the surface thereof is provided with an acrylic hard coat layer 2b. The hard coat layer 2b was of an ultraviolet curable type and had a thickness of 4 μm. The acrylic film 6b has a glass transition temperature of 101 ° C. and a film thickness of 12
The thing of 5 μm was used. Non-glare PET film 8
For b, 188 μm PET was used as a base material, and a hard coat surface provided with surface irregularities (non-glare surface) 72b formed by embossing was used. As the conductive mesh 41b, a polyester fiber made of Takase Metax, which is thinly plated with a copper layer and further coated with a conductive black resin to prevent reflection, was used. The mesh size was 100 × 100 mesh, and the fiber diameter was 40 μm. The acrylic film 51b for bonding is a soft acrylic film “Sanjuren” (50 μm in thickness) manufactured by Kaneka Corporation.
m) was used. The acrylic film 6b and the adhesive acrylic film 51b used were about 20 mm smaller than the vertical and horizontal sizes of the conductive mesh. With this configuration, the conductive mesh 41b is exposed to a width of about 10 mm over the entire circumference in the plane of the front plate (hereinafter, this surface is referred to as the mesh surface side), and the center of the front plate is 1 mm away from the mesh side surface.
The structure was embedded at a depth of about 40 μm.
The warpage of the front plate was as good as about 10 mm. The front panel thus obtained was set on a PDP screen.
At this time, set the mesh surface side to the PDP surface side, and
By connecting the mesh exposed at a width of 0 mm to the ground potential, good electromagnetic wave shielding performance was obtained. In addition, the use of the near-infrared shielding plate sufficiently shielded the near-infrared rays emitted from the PDP body, and did not cause any malfunction in the remote control operation of general electric appliances. In addition, a front plate having good visibility was obtained without generation of Newton rings due to unevenness formed on the mesh surface side. Further, the surface opposite to the mesh surface (hereinafter referred to as the observation surface side) had a practically good surface strength, and did not cause any damage in actual use.

Example 2-b As shown in FIG. 5, an acrylic film 11b with a hard coat layer 10b was placed on a SUS mirror-surface pressed plate 1b.
(Hard coat surface 10b is down), acrylic film 13b for adhesion, MMA plate 3 having near infrared shielding performance
b, conductive mesh 41b, adhesive acrylic film 5
1b, an acrylic film 61b, and a non-glare PET film 12b (the non-glare surface 71b is turned down) were arranged in this order, and then a mirror-surface press plate was set with the mirror-surface side down. Heat to 130 ° C in this state, 40K
g / cm ² , and after pressing for 20 minutes,
The transfer-type non-glare PET film 12b was removed, and a PDP front plate in which the unevenness of the non-glare surface of the PET film 12b was transferred onto the acrylic film 61b as shown in FIG. 6 was manufactured. The acrylic film 61b has a glass transition temperature of 105 ° C. and a film thickness of 25.
Non-glare PET film 12b
Used a 188 μm PET substrate having a non-glare surface formed by embossing a hard coat surface applied thereto. Hard coat layer 10
The acrylic film 11b with b is a 250 μm acrylic film coated with an acrylic urethane hard coat of 4 μm
What was given the degree was used. Conductive mesh 41b, M
The MA plate 3b and the acrylic film 51b for bonding are the same as those in Example 1-b, and the dimensions are the same as those in Example 1-b.
-B, the acrylic film 61b and the adhesive acrylic film 51b are larger than the vertical and horizontal sizes of the mesh by two.
The thing about 0 mm small was used. With this configuration, the mesh is exposed to a width of about 10 mm over the entire circumference in the plane of the front plate, and 260 μm from the mesh side surface at the center of the front plate.
The structure was embedded at a depth of about m. The warpage of the front plate was as good as about 15 mm. The front panel thus obtained was set on a PDP screen. The method of setting the front plate at this time is the same as that of the embodiment 1-b, and the electromagnetic wave shielding function and the near-infrared shielding function are also the same as those of the embodiment 1-b.
As in b, good results were obtained. As in Example 1-b, no Newton's ring was observed due to the unevenness formed on the mesh surface side, the surface had good surface hardness, and no damage occurred during actual use.

Example 3-b As shown in FIG. 7, a non-glare-treated PET film 8b was set on a SUS mirror-surfaced press plate 1b so that the non-glare surface was on the upper side. Film 15b (hard coat layer 14b down), acrylic film 13 for adhesion
b, an MMA plate 3b having a near-infrared ray shielding function, a conductive mesh 42b, an adhesive acrylic film 51b, an acrylic film 6b, and a non-glare PET film 8b (non-glare face down) are arranged in this order, and further thereon. Then, a mirror-surface press plate was set with the mirror surface side down. After heating to 135 ° C. and applying a pressure of 40 Kg / cm ² for 20 minutes in this state, the two non-glare PET films, which are transfer molds, were removed.
The unevenness of the non-glare surface of the T film 8b is changed to the hard coat layer 14b of the acrylic film 15b with a hard coat.
A front plate transferred to the upper and acrylic films 6b was manufactured. As the conductive mesh 42b, a polyester fiber in which a copper layer was thinly plated and further coated with a conductive black resin to prevent reflection was used. Mesh size is 9
The mesh was 0 × 90 mesh, and the fiber diameter was 40 μm. As the acrylic film 15b provided with the hard coat layer 14b, an acrylic film having a thickness of 125 μm and an acrylic hard coat layer applied to the surface of about 4 μm was used. Acrylic film 6b, non-glare PET film 8b,
The MMA plate 3b and the bonding acrylic film 51b are the same as those in Example 1-b, and the dimensions are the same as in Example 1-b, and the acrylic film 6b and the bonding acrylic film 51b are formed of the conductive mesh 42b. The one about 20 mm smaller than the vertical and horizontal size was used. With this configuration, the mesh was exposed at a width of about 10 mm over the entire circumference in the plane of the front plate, and was embedded at a depth of about 140 μm from the surface on the mesh side at the center of the front plate. The warpage of the front plate was as good as about 10 mm. The front panel thus obtained was set on a PDP screen. The method of setting the front plate at this time was the same as in Example 1-b, and good results were obtained for the electromagnetic wave shielding function and near-infrared ray shielding function as in Example 1-b. Also, due to the irregularities formed on the mesh surface side, as in Example 1-b,
No Newton's ring is observed, and the non-glare surface transferred to the hard coat on the observation surface side reduces the reflection of the screen, and good visibility without blurring of the screen despite non-glare processing on both sides Had the nature. In addition, it had good surface hardness, and did not cause any damage in actual use. Using the obtained front plate, an antistatic coating material (trade name: non-dust) made by Colcoat having a surfactant as a main component is applied to the observation surface side and the mesh surface side for the purpose of preventing the surface from being charged,
The surface resistance was set to 8 × 10 ¹⁰ Ω / □. The front plate obtained in this way was less likely to adsorb dust during use, and was able to maintain good visibility over a long period of time.

Example 4-b As shown in FIG. 9, on a SUS mirror surface pressing plate 1b,
Non-glare PET film 12b (non-glare surface up), acrylic film 15b with hard coat layer 2b (hard coat layer 2b down), adhesive acrylic film 13b, MM with near-infrared shielding function
The A plate 3b, the conductive mesh 43b, the adhesive acrylic film 51b, the acrylic film 16b provided with the hard coat layer 17b (the hard coat 17b is on the top), and the non-glare PET film 8b (the non-glare surface is on the bottom) And the mirror-surface press plate was set with the mirror surface side down. Heat to 135 ° C in this state, 40Kg
After applying a pressure of / cm ² and pressing, the non-glare PET film on the mesh surface side and the observation surface side is removed,
As shown in FIG. 10, the unevenness of the non-glare surface of the PET films 12b and 8b is changed to the acrylic films 15b and 16b.
Transferred to the hard coat layers 2b and 17b applied to
A DP front plate was manufactured. The acrylic films 15b and 16b with the hard coat layers 2b and 17b have a glass transition temperature of 1
A transparent acrylic film having a thickness of 125 μm and a temperature of 05 ° C. is used as a base material, and an acrylic hard coat is
μm. As the conductive mesh 43b, a polyester fiber in which a copper layer was thinly plated and further coated with a conductive black resin to prevent reflection was used. The mesh size expressed by the number of squares per inch of the conductive mesh was 140 × 140 mesh, and the fiber diameter was 40 μm. Non-glare PET film 8
b and 12b are the same as those used in Example 1-b and Example 2-b, respectively, and the MMA plate 3b and the acrylic film for bonding 13b are the same as those in Example 1-b. did. For dimensions, acrylic film 16b
And the bonding acrylic film 51b is, as in Example 1-b, 20 mm larger than the vertical and horizontal size of the conductive mesh.
The acrylic film 15b with a small size and the same size as the MMA plate 3b was used as the acrylic film 15b with the hard coat layer 2b. The obtained front plate had a structure in which the conductive mesh 43b was exposed to a width of about 10 mm over the entire circumference in the plane of the front plate, and was embedded at a depth of about 140 μm from the mesh side surface at the center of the front plate. . The warpage of the front plate was as good as about 10 mm. The front panel thus obtained was set on a PDP screen. The method of setting the front plate at this time was the same as in Example 1-b, and good results were obtained for the electromagnetic wave shielding function and near-infrared ray shielding function as in Example 1-b. No Newton rings are observed,
In addition, since the mesh surface side is a hard coat layer having irregularities formed thereon, there was little change in the non-glare surface due to heat released from the PDP and warpage of the front plate, and the durability was excellent. The observation surface side also had a good surface hardness, no damage in actual use, and good visibility. Further, for the purpose of preventing static electricity, an antistatic coat (trade name: non-dust) manufactured by Colcoat Co., Ltd. made of a surfactant was applied to the mesh surface side to have a surface resistance of 5 × 10 ⁹ Ω / □. The front plate thus obtained was able to suppress the progress of dirt on the mesh surface side during long-term use.

Example 5-b As shown in FIG. 11, a transparent MMA plate 32 was placed on a mirror plate 1b made of SUS using the same pressing device as in Example 1-b.
b, adhesive acrylic film 51b, conductive mesh 4
1b, adhesive acrylic film 51b, transparent MMA plate 3
3b, set the mirror surface SUS plate in this order,
Hot pressing was performed at a pressure of 40 kg / cm ² , and these were integrated. The transparent MMA plate 32b is a cast plate having a thickness of 3 mm, and the transparent MMA plate 33b is 1 mm thick.
Extruded plate was used. The conductive mesh 41b and the acrylic film for bonding 51b used were the same as those in Example 1-b. The transparent MMA plate 33b and the adhesive acrylic film 51b used were smaller by about 20 mm both vertically and horizontally than the mesh size. As shown in FIG. 12, the obtained front plate has a circumference of about 10 mm and a mesh exposed in the plane of the front plate as in Example 1-b.
It was embedded at a depth of about 1 mm from the mesh surface side. The front panel thus obtained was set on the screen of a PDP in the same manner as in Example 1-b. The electromagnetic wave shielding function was as good as in Example 1-b. The front plate obtained here had a warp of 25 mm, with the acrylic plate 33b on the mesh surface side being the convex surface side. When the front plate thus obtained was set on a PDP screen in the same manner as in Example 1-b, Newton rings were observed, and the surface on the observation surface side was easily scratched.

Example 1-c As shown in FIG. 13, an acrylic film 11c provided with a hard coat layer 10c was placed on a SUS mirror press plate 1c.
(The hard coat layer 10c is down), the acrylic film for adhesion 13c, the transparent resin plate 3c, and the conductive mesh 41.
c, adhesive acrylic film 51c, acrylic film 61c, non-glare PET film (non-glare surface 71)
12c were arranged in this order, and the mirror-surface press plate 2c was set thereon with the mirror surface side down. After heating to 130 ° C. and applying a pressure of 40 Kg / cm ² for 20 minutes in this state, the non-glare PET film 12c which is a transfer type was removed, and the surface of the acrylic film 61c as shown in FIG. The front plate in which the unevenness of the PET surface was transferred was manufactured. Printing unit 201c
Uses acrylic ink on the surface of the transparent resin plate 3c,
It was created by printing black over a width of 30 mm around the front plate and printing white characters on a part of the black printed portion. The acrylic film 61c has a glass transition temperature of 1
A film having a temperature of 05 ° C. and a thickness of 250 μm was used. The non-glare PET film 12c has a thickness of 188 μm.
A polyethylene terephthalate film having a non-glare surface formed by embossing on a hard coat surface applied thereto was used. The acrylic film 11c with the hard coat layer 10c has a thickness of 25
An acrylic urethane-based hard coat having a thickness of about 4 μm was applied to a 0 μm acrylic film.
As the conductive mesh 41c, a polyester fiber made of Takase Metax, which is thinly plated with a copper layer and further coated with a conductive black resin to prevent reflection, was used. Mesh size is 100 × 100 mesh, fiber diameter is 40
μm. The transparent resin plate 3c is a resin plate (thickness 3 mm, polymethyl methacrylate,
Cast plate). The hard coat layer 10c of the acrylic film 11c is of an ultraviolet curing type and has a thickness of 4 μm.
m. Acrylic films 13c, 51c for bonding
Used a soft acrylic film “Sanjulen” (50 μm in thickness) manufactured by Kanegafuchi Chemical Co., Ltd. In the dimensions, the acrylic film 61c and the bonding acrylic film 51c are 20 mm larger than the vertical and horizontal sizes of the conductive mesh 41c.
The conductive mesh 41c, the acrylic film 13c for adhesion, and the acrylic film 11c each having the same size as the transparent resin plate 3c were used.
With this configuration, the conductive mesh 41c was exposed to a width of about 10 mm over the entire circumference in the plane of the front plate.
Except for the surrounding exposed part, the conductive mesh 41c
The structure was embedded at a depth of about 260 μm from the mesh side surface. When the front panel thus obtained was set on the screen of a PDP, the screen was tightened due to the surrounding black printing, and an excellent appearance was obtained. By setting the mesh surface on the PDP side, the surrounding front exposed mesh part is hidden by the printing part and cannot be seen from the front, and the printing part has a mesh and near-infrared shielding. Since it is located on the front side of the resin plate having high performance, clear printing colors were secured, and the durability of the printed portion was also excellent. Furthermore, the obtained front panel has good electromagnetic wave shielding performance by connecting the exposed mesh to the ground potential, greatly reduces leakage electromagnetic waves, and can sufficiently shield near-infrared radiation from the PDP body. Front panel.

Example 2-c As shown in FIG. 15, a non-glare PET film 8c was set on a SUS mirror press plate 1c so that the non-glare surface 72c was on the top, and the hard coat layer 1c was placed thereon.
Acrylic film 15c provided with 4c (hard coat layer 14c down), acrylic film 23c, transparent resin plate 3c, conductive mesh 42c, bonding acrylic film 51c, acrylic film 6c, non-glare PE
The T film 12c (with the non-glare surface 72c facing down) is arranged in this order, and a copper metal thin film 101c is placed on the conductive mesh 42c so that its width of about 10 mm comes under the adhesive acrylic film 51c and overlaps it. And the mirror press plate 2
c was set with the mirror side down. 135 ° C in this state
After heating and applying a pressure of 40 kg / cm ² for 20 minutes, the two non-glare PET films (8c, 12c), which are transfer molds, were removed, and a non-glare PET film as shown in FIG. Of the non-glare surface was transferred onto the hard-coated surface of the hard-coated acrylic film and onto the acrylic film. The printing unit 202c was prepared by printing black on the surface of the acrylic film 23c using acrylic ink over the periphery of the front plate 25 mm, and further printing white characters on a part of the black printing unit. Copper metal thin film 10
1c is a tape having a width of 20 mm and a thickness of 20 μm, which was cut into an appropriate size so that it could be arranged on the entire periphery of the mesh. As the conductive mesh 42c, a polyester fiber in which a copper layer was thinly plated and further coated with a conductive black resin to prevent reflection was used. The mesh size was 90 × 90 mesh, and the fiber diameter was 40 μm. As the acrylic film 15c provided with the hard coat layer 14c, an acrylic film having a thickness of 125 μm and an acrylic hard coat layer provided on the surface of about 4 μm was used. The acrylic film 6c used had a thickness of 125 μm. The non-glare PET films (8c, 12c) were formed by embossing a PET film having a thickness of 188 μm. The same transparent resin plate 3c and the same acrylic film 51c as in Example 1-c were used. The size of the acrylic film 6c and the bonding acrylic film 51c is about 20 mm smaller than the vertical and horizontal sizes of the mesh.
c, acrylic film 23c and acrylic film 15
c used the same size as the transparent resin plate 3c.
The copper thin film 101c has a width of 10
mm and was provided around the front plate in a state of overlapping with the conductive mesh 42c. Except for the portion where the copper thin film was disposed, the conductive mesh 42c had a structure embedded at a depth of about 140 μm from the mesh side surface. The front plate thus obtained was set on a PDP screen in the same manner as in Example 1-c. Due to the black printing around the front plate provided in the printing part, the copper thin film part was hidden and could not be seen from the front, the print color was also clear, and the effect of modifying the screen was sufficient. As for the electromagnetic wave shielding function and the near infrared ray shielding function, good results were obtained as in Example 1-c. Further, an antistatic coating material (manufactured by Colcoat Co., Ltd., non-dust) having a surfactant as a main component is applied to the surface of the obtained front plate on the observation surface side and the mesh surface side to reduce the surface resistance to 8 × 10 4. ¹⁰
Ω / □. The obtained front panel reduced dust absorption during use and maintained good visibility over a long period of time.

Example 3-c As shown in FIG. 17, a non-glare PET film 12c (non-glare surface 7
2c on the top), an acrylic film 15c provided with a hard coat layer 14c (the hard coat layer 14c on the bottom), an adhesive acrylic film 13c, and a transparent resin plate 3.
c, conductive mesh 43c, adhesive acrylic film 5
1c, acrylic film 16c provided with hard coat layer 17c (on hard coat layer 17c), non-glare PET film 8c (on non-glare surface 72c)
Are arranged in this order, and a copper thin metal film 104c is arranged over the entire periphery of the end of the conductive mesh such that the width thereof is about 5 mm below the bonding acrylic film 51c. The plate 2c was set with the mirror side down. Heat to 135 ° C in this state, 40K
g / cm ² , and after pressing, a non-glare PET film (8c,
12c) is removed, and the unevenness of the non-glare surface of the non-glare PET film as shown in FIG. 18 is changed to the acrylic films 15c and 16c with the hard coat layers 14c and 17c.
The front plate transferred to the hard coat surface was manufactured. The copper thin metal film 104c was in the form of a tape having a width of 15 mm and a thickness of 15 μm, and was cut into an appropriate size so that it could be arranged on the entire periphery of the mesh. The same acrylic film 15c with the hard coat layer 14c as in Example 2-c was used. The printing section 203c was provided by printing black on the surface of the acrylic film 15c using an acrylic ink over a circumference of 25 mm around the front plate. The acrylic films 15c and 16c with a hard coat layer have a glass transition temperature of 105
A transparent acrylic film having a thickness of 125 μm as a base material and an acrylic hard coat layer on one side of 5 μm.
m. As the conductive mesh 43c, a polyester fiber in which a copper layer was thinly plated and further coated with a conductive black resin to prevent reflection was used.
The mesh size was 140 × 140 mesh, and the fiber diameter was 40 μm. Non-glare PET film (8c,
12c) are those used in Example 2-c and Example 1-c, the transparent resin plate 3c, and the acrylic film 5 for bonding, respectively.
For 1c, the same material as in Example 1-c was used. In the dimensions, the acrylic film 16c and the adhesive acrylic film 51c are smaller than the conductive mesh 43c by about 20 mm in length and width, and the conductive mesh 4c is used.
3c, the acrylic film for adhesion 13c and the acrylic film 15c were all the same size as the transparent resin plate 3c. In the obtained front plate, the copper thin film 104c
Has a configuration in which a width of about 10 mm is exposed over the entire circumference in the plane of the front plate. Except for the portion where the copper thin film 104c is arranged, the conductive mesh 43c is made of the acrylic film 1
The structure is embedded from the mesh side surface to a depth of about 140 μm, which is obtained by adding the thickness of the adhesive acrylic film 51c to the thickness of the adhesive acrylic film 51c. The front plate thus obtained was set on a PDP screen in the same manner as in Example 1-c. Due to the black printing around the front plate, the copper thin film portion was in a hidden form and could not be seen from the front, and the printed color was clear and the effect of modifying the screen was sufficient. As for the electromagnetic wave shielding function and the near infrared ray shielding function, good results were obtained as in Example 1-c. Further, for the purpose of preventing static electricity, an antistatic coat (trade name: non-dust) made of Colcoat Co., Ltd. made of a surfactant was applied to the mesh surface side, and the surface resistance was set to 5 × 10 ⁹ Ω / □. The obtained front plate was able to suppress the progress of dirt on the mesh surface side during long-term use.

Comparative Example 1-c As shown in FIG. 19, using the same press as in Example 1-c, a transparent resin plate 3c having a near-infrared shielding function, an acrylic film for bonding, was placed on a mirror plate 1c made of SUS. 51c,
Conductive mesh 41c, adhesive acrylic film 51
c, the transparent resin plate 33c, and the mirror-finished SUS plate 2c were set in this order, and hot-pressed at 130 ° C. and a pressure of 40 kg / cm 2 to make them integral. Printing unit 204c
Is provided on the surface of the transparent resin plate 33c in black with a width of 10 mm around, and white characters are printed on a part thereof. The transparent resin plate 33c is a 1 mm thick extruded plate (polymethacrylate)
The conductive mesh 41c and the bonding acrylic film 51c are made of the same material as in Example 1-c, and the transparent resin plate 3c, the transparent resin plate 33c, and the bonding acrylic film 5 are used.
1c and the conductive mesh 41c had the same size both vertically and horizontally. After pressing, the entire circumference is 1
Cut about 0 mm, and put the conductive paste 301 on the cross section.
c (Dotite D-500, manufactured by Fujikura Kasei Co., Ltd.)
After drying, a copper tape 401c was attached. FIG.
As shown in (2), in the obtained front plate, the conductive mesh 41c is on the mesh surface side (the transparent resin plate 33c side).
From the transparent resin plate 33c and the bonding acrylic film 51
The structure was embedded at a depth of about 1 mm including the thickness of c. In FIG. 8C, the conductive paste 30 is used.
1c and the copper tape 401c are shown only on the left side, and are omitted on the right side. The front plate thus obtained was set on the screen of the PDP so that the printed portion faced the display side, and the copper tape 401c was connected to the ground potential, but the electromagnetic wave shielding function was insufficient. Printing was affected by the conductive mesh and the transparent synthetic resin plate having a near-infrared shielding function, and had poor contrast.
In addition, since the printed portion is exposed on the surface on the display side, the printed portion is easily scratched and has insufficient durability.

Example 1-d As shown in FIG. 24, a transparent resin plate 3d [hard coat layer 2d
The conductive mesh 4d, the conductive film 5d, the adhesive film 6d, the transparent resin plate 7d, and the non-glare film 9d (the non-glare surface 8d is turned down) are arranged in this order, and a mirror-surface press plate is placed thereon. 10d was placed with the mirror side 11d facing down. Note that the conductive film 5d is a bonding film 6d.
In addition, the conductive mesh 4d and the entire surface of the front plate were arranged so as to overlap each other with a width of about 10 mm. In this state, a pressure of 40 kg / cm ² was applied at 130 ° C. and pressed for 20 minutes. Thereafter, the non-glare film 9d was removed to obtain a front panel for a plasma display as shown in FIG. The transparent resin plate 3d is a cast plate of acrylic resin having a near-infrared shielding function (thickness 3m).
m), and the hard coat layer 2d on the surface thereof is a layer (thickness 4) formed by ultraviolet curing an acrylic hard coat agent.
μm). The conductive mesh 4d is a conductive mesh (manufactured by Takase Metals Co., Ltd., mesh size 100 × 100 mesh, fiber diameter 40 μm) in which a copper layer is thinly plated on a polyester fiber and further coated with a conductive black resin to prevent reflection. The size was almost the same as that of the transparent resin plate 3d. 20 m width for conductive film 5d
m, using a copper tape having a thickness of 20 μm, and a conductive mesh 4
d was cut in advance to an appropriate size so that it could be arranged on the entire circumference of d. In the conductive film 5d, a hole having a diameter of about 1 mm was provided in a portion 13d overlapping with the bonding film 6d in a number of about 5 per cm ² of the conductive film (the total opening area of the holes is the total of the conductive film 5d. 3.9% of area). On the conductive film 5d, a 20 μm-thick thermoplastic adhesive (HM type) manufactured by Panac Co., Ltd. was applied on the surface facing the transparent resin plate 3d.
It was coated to a thickness of about the same, and the above-mentioned holes were provided in a form penetrating the conductive film and the adhesive. Adhesive film 6d is a soft acrylic film "Sanjuren" manufactured by Kanegafuchi Chemical Co., Ltd.
(Thickness: 50 μm), the size of which is 3d
Both in the vertical and horizontal directions are made smaller by about 20 mm. The transparent resin plate 7d uses an acrylic resin film (glass transition temperature: 101 ° C., thickness: 125 μm), and its size is 2 times longer and shorter than the transparent resin plate 3d.
It was cut so as to be about 0 mm smaller and used. Non-glare film 9d is made of PET with a hard-coated surface
A film having a surface unevenness (non-glare) 8d formed by embossing on a hard coat layer of a film (thickness: 188 μm) was used, and the size was almost the same as that of the transparent resin plate 3d. In the obtained front plate, the conductive film 5
d was exposed to a width of about 10 mm over the entire circumference in the plane of the front plate (hereinafter, the surface on which the conductive film is exposed is referred to as a mesh surface side), and overlapped with the conductive mesh 4d. In addition, the conductive film 5d overlaps with the conductive mesh 4d in a region 13d overlapping with the bonding film 6d and the transparent resin plate 7d in a state in which the conductive mesh 4d is firmly contacted. It was firmly fixed by the resin plate 7d. The conductive mesh 4d had a structure embedded in the region 14d other than the portion overlapping with the conductive layer 5d from the mesh side surface by about 140 μm. When this front plate was attached to a PDP with the mesh side facing the PDP and the exposed portion of the conductive film 5d was connected to the ground potential, electromagnetic waves could be effectively shielded. In addition, near infrared rays emitted from the PDP body were sufficiently shielded, and no malfunction occurred in remote control operation of general electric appliances. Further, when the front panel was brought into contact with the display screen of the PDP, no Newton's ring was confirmed, and the visibility of the PDP screen was good. Furthermore, the surface opposite to the mesh surface side (hereinafter referred to as the observation surface side) had practically good surface strength, and did not cause any damage in actual use.

Example 2-d As shown in FIG. 26, a transparent resin plate 17 having a hard coat layer formed on the surface thereof was formed on a stainless steel mirror press plate 1d.
d (hard coat layer 16d down), adhesive film 18d, transparent resin plate 3d, conductive mesh 4d, conductive film 5d, adhesive film 6d, transparent resin plate 7d, non-glare film 9d [non-glare surface 8d down Are arranged in this order, and a mirror-surface press plate 10d is arranged thereon with the mirror surface side 11d facing down. The conductive film 5d was arranged so as to overlap the adhesive film 6d and the conductive mesh 4d with a width of about 5 mm over the entire circumference of the front plate. In this state, heating to 130 ° C.
Pressing was performed for 20 minutes while applying a pressure of ² cm ² . Thereafter, the non-glare film 9d was removed to obtain a front panel as shown in FIG. The transparent resin plate 3d is a cast plate of acrylic resin having a near-infrared shielding function (thickness 3m).
m) was used. The transparent resin plate 17d is an acrylic plate having a thickness of 250 μm, and the hard coat layer 16d on the surface thereof is a layer (thickness 4 μm) formed by curing an acrylic urethane-based hard coat agent with ultraviolet rays. It was almost the same as 3d. The conductive mesh 4d is a conductive mesh (manufactured by Takase Metals Co., Ltd., mesh size 100 × 1) in which a copper layer is thinly plated on a polyester fiber and further coated with a conductive black resin to prevent reflection.
(00 mesh, fiber diameter 40 μm), and the size was almost the same as that of the transparent resin plate 3d. The conductive film 5d has a width of 1
An aluminum tape having a thickness of 5 mm and a thickness of 30 μm was cut into a suitable size in advance so that it could be arranged on the entire periphery of the conductive mesh. In the conductive film 5d, about eight holes with a diameter of about 0.7 mm were provided in a portion overlapping with the adhesive film 6d per cm ² of the conductive film (the total opening area of the holes was the area of the conductive film. 3.1%). As the adhesive films (6d, 18d), a soft acrylic film “Sanjuren” (50 μm in thickness) manufactured by Kanegafuchi Chemical Co., Ltd. was used. The size of the adhesive film 6d was set to be smaller by about 20 mm both vertically and horizontally than the transparent resin plate 3d, and the size of the adhesive film 18d was almost the same size as the transparent resin plate 3d. As the transparent resin plate 7d, an acrylic film having a glass transition temperature of 105 ° C. and a thickness of 250 μm was used, and its size was smaller by about 20 mm in both length and width than the synthetic resin plate 3d. Non-Green Film 9
As for d, a hard coat layer of a PET film (thickness: 188 μm) having a hard coat surface formed with surface irregularities (non-glare) 8d formed by embossing is used. The same size. In the obtained front plate, the conductive film 5d is exposed to a width of about 10 mm over the entire circumference in the plane of the front plate. They overlapped in contact with each other, and were firmly fixed by the transparent resin plate 3d, the adhesive film 6d, and the transparent resin plate 7d. The conductive mesh 4d had a structure embedded in the region 14d other than the portion overlapping with the conductive layer 5d from the mesh side surface by about 260 μm.
When this front plate was attached to a PDP with the mesh surface side facing the PDP side and the exposed portion of the conductive film 5d was grounded, electromagnetic waves could be effectively shielded. In addition, near infrared rays emitted from the PDP body were sufficiently shielded, and no malfunction occurred in remote control operation of general electric appliances. Further, when the front panel was brought into contact with the display screen of the PDP, no Newton's ring was confirmed, and the visibility of the PDP screen was good. Further, the observation surface side had a practically good surface strength, and no damage occurred in actual use.

Example 3-d As shown in FIG. 28, a non-glare film 20d (the non-glare surface 19d is turned upward), a transparent resin plate 17d [a hard coat layer 16d]
To the bottom], adhesive film 18d, transparent resin plate 3
d, a conductive mesh 4d, a conductive film 5d, an adhesive film 6d, a transparent resin plate 7d, and a non-glare film 9d (with the non-glare surface 8d down) in this order. 11d was placed down. The conductive film 5d has a width of 5 mm over the entire periphery of the conductive mesh 4d and the bonding film 6d and the front plate.
mm and a width of 5 mm below the transparent resin plate 3d.
It was folded at about mm and arranged. In this state, heating was performed at 135 ° C., and a pressure of 40 kg / cm ² was applied to perform pressing for 20 minutes. Then, a non-glare film (9d, 20
d) was removed to obtain a front plate as shown in FIG. An antistatic agent (main component was a surfactant, manufactured by Colcoat, trade name: Nondust) was applied to the mesh surface side and the observation surface side of the front plate. The transparent resin plate 3d is a cast plate of acrylic resin having a near-infrared shielding function (thickness: 3 mm)
Was used. The transparent resin plate 17d is an acrylic plate having a thickness of 250 μm, and the hard coat layer 16d on the surface thereof is a layer (thickness: 4 μm) formed by ultraviolet curing an acrylic hard coat agent. The size was almost the same size as the transparent resin plate 3d. As the conductive mesh 4d, a polyester fiber whose surface was thinly plated with copper and further coated with a conductive black resin was used. The mesh size is 90 × 90 mesh, and the fiber diameter is 40 μm. The size was almost the same size as the transparent resin plate 3d. The conductive film 5d uses a copper tape having a width of 19 mm and a thickness of 15 μm,
It was cut into a suitable size in advance so that it could be arranged on the entire circumference of the conductive mesh before use. In the conductive film 5d, approximately 25 holes having a diameter of about 1.0 mm were provided per 1 cm ² of the conductive film in a portion overlapping with the adhesive film 6d (the total opening area of the holes is the total area of the conductive film 5d). 19.6
%). The adhesive film (6d, 18d) is a soft acrylic film “Sanjuren” (50 μm in thickness) manufactured by Kanegafuchi Chemical Co., Ltd.
m) was used. The size of the bonding film 6d is smaller than that of the transparent resin plate 3d by about 20 mm both in the vertical and horizontal directions, and the bonding film 18d is used in substantially the same size as the transparent resin plate 3d. The transparent resin plate 7d is an acrylic resin film (glass transition temperature: 101 ° C., thickness: 125 μm)
And the size thereof was smaller by about 20 mm in both length and width than the transparent resin plate 3d. Non-glare films (9d, 20d) are formed by embossing a hard coat layer of a PET film (thickness: 188 μm) whose surface is hard-coated.
The one having d and 19d was used, and its size was almost the same as that of the transparent resin plate 3d. In the obtained front plate, the conductive layer 5d overlaps with the conductive mesh 4d and is exposed around the entire periphery in the plane of the front plate by about 10 mm in width, and in the region 13d overlapping with the bonding film 6d and the transparent resin plate 7d. Was overlapped with the conductive mesh 4d in a strong contact state, and was firmly fixed by the transparent resin plate 3d, the adhesive film 6d, and the transparent resin plate 7d. The conductive film 5d is further folded between the transparent resin plate 3d and the transparent resin plate 17d, and is more firmly fixed to the front plate. The conductive mesh 4d had a structure embedded about 140 μm from the mesh surface side in a region 14d other than a region overlapping with the conductive layer 5d. The surface resistance of this front plate is 8 × 10 ¹⁰
Ω / □. In addition, when the mesh surface side was turned to the PDP side and the exposed portion of the conductive film 5d was attached to the PDP while grounding, the electromagnetic wave could be shielded effectively. Also,
Near infrared rays radiated from the PDP body are also well shielded,
No malfunction occurred in the remote control operation of general electric appliances. Further, when the front panel was brought into contact with the display screen of the PDP, no Newton's ring was confirmed, and the visibility of the PDP screen was good. Further, the observation surface side had a practically good surface strength, and no damage occurred in actual use. In addition, there was little adhesion of dust even after long-term use.

Comparative Example 1-d As shown in FIG. 30, a transparent resin plate 3d, an adhesive film 6d, a conductive mesh 4d, an adhesive film 6d, and a transparent resin plate 7d were placed on a SUS mirror press plate 1d. The mirror surface press plate 10d is placed on the mirror surface side 1
1d was placed down. . In this state, the mixture was heated to 130 ° C., pressed under a pressure of 40 kg / cm ² for 20 minutes to obtain a front plate. The four sides of the front plate were cut with a width of 1 to 4 mm to align the side surfaces, and as shown in FIG. 31, a conductive paste 22d was applied to the side surfaces so as to be in contact with the conductive mesh 4d. As the transparent resin plate 3d,
A transparent acrylic resin plate (cast plate, thickness 3 mm) was used. As the adhesive film 6d, a soft acrylic film “Sanjuren” (50 μm in thickness) manufactured by Kanegafuchi Chemical Co., Ltd. was used.
Its size was almost the same as that of the transparent resin plate 3d. The conductive mesh 4d (manufactured by Takase Metax Co., Ltd., mesh size 100 × 100 mesh, fiber diameter 40 μm, same conductive mesh as used in Example 1-d) was used,
Its size was almost the same as that of the transparent resin plate 3d. The transparent resin plate 7d is a transparent acrylic resin plate (extruded plate, 1 m thick)
m), and the size was almost the same as that of the transparent resin plate 3d. As the conductive paste 22d, Doitite D-500 manufactured by Fujikura Kasei Co., Ltd. was used. The obtained front plate had a structure in which the conductive mesh 4d was embedded at a depth of about 1 mm from the surface on the transparent resin plate 7d side. This front plate is connected to the PDP while the conductive paste 22d is grounded.
, The electromagnetic wave could not be shielded stably. Further, when the front panel was brought into contact with the display screen of the PDP, Newton rings occurred, and the visibility of the PDP screen was poor. Further, the observation surface side was easily damaged in actual use.

[Brief description of the drawings]

FIG. 1 is a layout diagram showing a configuration of a front panel for a plasma display in Example 1-a.

FIG. 2 is a layout diagram showing a configuration of a front plate in Comparative Example 1-a.

FIG. 3 is a diagram showing a lamination structure at the time of hot pressing in Example 1-b.

FIG. 4 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 1-b.

FIG. 5 is a diagram showing a lamination structure at the time of hot press working in Example 2-b.

FIG. 6 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 2-b.

FIG. 7 is a diagram showing a lamination structure at the time of hot pressing in Example 3-b.

FIG. 8 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 3-b.

FIG. 9 is a diagram illustrating a lamination structure during hot press working in Example 4-b.

FIG. 10 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 4-b.

FIG. 11 is a diagram showing a lamination structure at the time of hot press working in Example 5-b.

FIG. 12 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 5-b.

FIG. 13 is a view showing a lamination structure at the time of hot press working in Example 1-c.

FIG. 14 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 1-c.

FIG. 15 is a diagram showing a lamination structure during hot press working in Example 2-c.

FIG. 16 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 2-c.

FIG. 17 is a diagram showing a lamination structure during hot press working in Example 3-c.

FIG. 18 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 3-c.

FIG. 19 is a diagram showing a laminated configuration at the time of hot press working in Comparative Example 1-c.

FIG. 20 is a cross-sectional view illustrating a layer configuration of a front plate in Comparative Example 1-c.

FIG. 21 is a top view showing a positional relationship between a transparent resin plate and a conductive film in the present invention.

FIG. 22 is a top view showing a positional relationship between a transparent resin plate and a conductive film in the present invention.

FIG. 23 is a cross-sectional view showing a positional relationship between a transparent resin plate and a conductive film in the present invention.

FIG. 24 is a diagram showing a lamination structure at the time of hot pressing in Example 1-d.

FIG. 25 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 1-d.

FIG. 26 is a diagram illustrating a lamination structure during hot press working in Example 2-d.

FIG. 27 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 2-d.

FIG. 28 is a diagram showing a lamination structure during hot press working in Example 3-d.

FIG. 29 is a cross-sectional view illustrating a layer configuration of a front panel for a plasma display in Example 3-d.

FIG. 30 is a diagram showing a laminated configuration at the time of hot press working in Comparative Example 1-d.

FIG. 31 is a cross-sectional view illustrating a layer configuration of a front plate in Comparative Example 1-d.

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI G09F 9/00 318 H01J 11/02 Z H01J 11/02 17/16 17/16 G02B 1/10 Z (31) Claim number of priority Japanese Patent Application No. Hei 9-206152 (32) Priority Date Hei 9 (1997) July 31, (33) Priority Country Japan (JP) (72) Inventor Kayoko Ueda 2-10-1 Tsukahara, Takatsuki-shi, Osaka Sumitomo Chemical Industry Co., Ltd.

Claims (18)

[Claims] 1. A front plate having at least one transparent resin plate and a conductive mesh laminated on the transparent resin plate, wherein a part of the conductive mesh is on a surface of the front plate. A front plate for a plasma display, which is exposed in a plane at least on one side of a peripheral portion. 2. The front plate for a plasma display according to claim 1, wherein the conductive mesh is exposed in a planar manner in all four peripheral portions on a surface of the front plate. 3. At least one surface has irregularities,
The front plate for a plasma display according to claim 1. 4. The front plate for a plasma display according to claim 1, wherein the conductive mesh is at a depth of 0.5 mm or less from one surface of the front plate. 5. The front plate for a plasma display according to claim 3, wherein the irregularities are formed by being transferred from a transfer mold. 6. The front panel for a plasma display according to claim 3, wherein the irregularities are formed by being transferred from a transfer mold, and the transfer mold is a film having irregularities formed on a surface thereof. 7. The front panel for a plasma display according to claim 3, wherein the irregularities are formed on one surface and a hard coat layer is formed on the other surface. 8. The front plate for a plasma display according to claim 3, wherein at least one surface has a hard coat layer, and the surface on which the hard coat layer is formed has irregularities. 9. The front panel for a plasma display according to claim 1, further comprising an intermediate synthetic resin plate between the conductive mesh and the transparent resin plate, and further comprising a decorative portion between the intermediate synthetic resin plate and the transparent resin plate. . 10. The front panel for a plasma display according to claim 9, wherein the decorative portion covers and hides an exposed portion of the conductive mesh. 11. The front panel for a plasma display according to claim 9, wherein said decorative portion is provided by printing. 12. The front panel for a plasma display according to claim 9, comprising a conductive film, wherein the decorative portion covers and covers the conductive film. 13. A conductive film, further comprising a conductive film, wherein the conductive film is in contact with the conductive mesh in a planar shape on at least one side of a peripheral portion on a surface of the front plate.
Front panel for plasma display. 14. The front plate for a plasma display according to claim 13, wherein said conductive film is provided with holes. 15. The front plate for a plasma display according to claim 1, wherein the transparent resin plate has near-infrared shielding performance. 16. A resin composition in which the transparent resin plate contains a monomer having an unsaturated double bond, a copolymer obtained by copolymerizing a phosphorus atom-containing monomer, and a compound containing a copper atom. The front plate for a plasma display according to claim 15, comprising: 17. The front plate for a plasma display according to claim 15, wherein the transparent resin plate contains a dye-based near-infrared absorbing agent. 18. A front plate having at least one transparent resin plate and a conductive mesh laminated on the transparent resin plate, wherein a part of the conductive mesh is on a surface of the front plate. A plasma display in which a plasma display front plate that is exposed in a plane on at least one side of a peripheral portion is provided on the entire surface.