JP2002043791A - Light transmission laminate with electromagnetic wave shieldability and its bonding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light transmission laminate with electromagnetic wave shieldability which facilities integration to the casing, enables having uniform and low-resistant conduction for the casing and can be mass-produced in a continuous production line. SOLUTION: In this light transmission laminate with electromagnetic wave shieldability 10A, an electromagnetic shielding material 2 and a transparent film 1 which covers its surface are laminated and integrated by an exfoliating adhesive 4 or an adhesive. A cutting line 9 is created on the transparent film 1 along it edge at a margin of the laminate 10A. After placing the laminate 10A in a mounting object member or before placing the electromagnetic shielding material 2 is appeared by exfoliating and removing a margin 11 of the transparent film 1 along the cutting line 9 and a conductive adhesive tape 30 is installed in this surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding light transmitting laminate useful as a front filter or the like of a plasma display panel (PDP), which is easily incorporated into a housing of OA equipment or the like. The present invention relates to an electromagnetic wave shielding light transmitting laminate capable of achieving good conduction and a method for mounting the same.

[0002]

2. Description of the Related Art In recent years, with the spread of office automation equipment and communication equipment, electromagnetic waves generated from these equipment have become a problem. That is, there is a concern that the electromagnetic waves may affect the human body, and malfunctions of precision equipment due to the electromagnetic waves have become a problem.

Therefore, as a front filter of a PDP of an OA device, a window material having an electromagnetic wave shielding property and a light transmitting property has been conventionally developed and put to practical use. Such a window material is also used as a window material in a place where precision equipment is installed, such as a hospital or a laboratory, in order to protect precision equipment from electromagnetic waves such as mobile phones.

[0004] The conventional electromagnetic-shielding light-transmitting window material has a structure in which a conductive mesh material such as a wire mesh is interposed between transparent substrates such as an acrylic plate to be integrated.

[0005] In order to obtain good electromagnetic wave shielding properties by incorporating such an electromagnetic wave shielding light transmitting window material into a PDP or the like, the electromagnetic wave shielding light transmitting window material and a housing in which the electromagnetic wave shielding light transmitting window material is installed, It is necessary to achieve uniform conduction between the conductive mesh of the shielding light transmitting window material and the conductive surface of the housing.

Conventionally, as a means for achieving conduction between an electromagnetic wave shielding light transmitting window material and a housing with a simple structure, the periphery of a conductive mesh interposed between two transparent substrates protrudes from the periphery of the transparent substrate. Then, the protruding portion is bent toward the surface of one of the transparent substrates, and the peripheral portion of the bent conductive mesh is used as a conductive portion with the housing so as to be pressed against the housing. Kaihei 9-147752
No.).

[0007]

In the conventional structure in which the peripheral portion of the conductive mesh is protruded from the transparent substrate, and this portion is simply bent and directly pressed against the housing, the conductive mesh is frayed, and the conductive mesh has a good quality. In some cases, conduction cannot be achieved. Since the toughness of the conductive mesh is high, it is difficult to fold the peripheral edge, and it is easy to be displaced. There is a problem that it is difficult to reliably obtain uniform and low-resistance continuity at the entire peripheral portion of the electromagnetic wave shielding light transmitting window material.

When another electromagnetic wave shielding material such as a transparent conductive film is used as the electromagnetic wave shielding material instead of the conductive mesh, the above-mentioned fraying problem does not occur, but the transparent conductive film is easily torn at the bent portion. There is a problem.

Further, when the peripheral portion of the electromagnetic wave shielding material such as a conductive mesh or a transparent conductive film is protruded from the transparent substrate, a laminate of the transparent substrate and the electromagnetic wave shielding material is manufactured on a continuous production line. However, there is a disadvantage that the production cost is increased due to poor production efficiency.

The present invention solves the above-mentioned conventional problems, is easy to assemble into a housing, can achieve uniform and low-resistance conduction to the housing, and can be mass-produced on a continuous production line. An object of the present invention is to provide a possible electromagnetic wave shielding light transmitting laminate and a method of mounting the electromagnetic wave shielding light transmitting laminate.

[0011]

The electromagnetic wave shielding light transmitting laminate of the present invention is an adhesive capable of peeling off an electromagnetic wave shielding material and a transparent film covering the surface thereof (hereinafter referred to as "peelable adhesive"). ) Or an electromagnetic-shielding light-transmitting laminate that is laminated and integrated with an adhesive, wherein a cut line is formed in the transparent film along an edge of a side of the electromagnetic-shielding light-transmitting laminate. Is provided.

With this electromagnetic wave shielding light transmitting laminate, the electromagnetic wave shielding material can be removed by peeling off the side edge of the electromagnetic wave shielding light transmitting laminate along the cut line in the transparent film covering the electromagnetic wave shielding material. The electromagnetic wave shielding material can be exposed on the surface of the side edge of the transparent light-transmitting laminate. For this reason, it is possible to achieve good conduction between the electromagnetic wave shielding light transmitting laminate and the housing by, for example, attaching a conductive adhesive tape to the exposed portion of the electromagnetic wave shielding material as necessary.

This cut line can be easily formed by laser processing.

In the present invention, the transparent film covering the electromagnetic wave shielding material is preferably an antireflection film or an antireflection / near infrared cut film.

Further, the electromagnetic wave shielding light transmitting laminate of the present invention may be a direct-attached type provided with an adhesive layer as the backmost layer, or a self-standing type provided with a transparent substrate on the backmost layer. It may be something.

The method of mounting the electromagnetic wave shielding light transmitting laminate of the present invention is a method of mounting such an electromagnetic wave shielding light transmitting laminate of the present invention on a member to be mounted. After arranging the body on the member to be mounted or prior to arranging, by peeling off the edge of the transparent film along the cut line, it is characterized by that the electromagnetic wave shielding material is exposed, According to this method, the mounting and conduction of the electromagnetic wave shielding light transmitting laminate can be performed very easily.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 6 are schematic sectional views showing an electromagnetic wave shielding light transmitting laminate according to an embodiment of the present invention and a mounting method thereof.

The electromagnetic wave shielding light transmitting laminate 10 of FIG.
In A, the outermost antireflection film 1, the electromagnetic wave shielding material 2, and the near-infrared cut film 3 are integrally laminated by using the adhesive layers 4 and 5 (the adhesive layer 4 is a peelable adhesive layer). The laminate 10a (FIG. 1 (a)) is provided with an adhesive layer 6 as the rearmost layer on the outer surface of the near-infrared cut film 3. A cut line 9 is formed in the anti-reflection film 1 so as to reach the electromagnetic wave shielding material 2 by laser processing (FIG. 1B).

This electromagnetic wave shielding light transmitting laminate 10A
Then, as shown in FIG. 1C, after the adhesive layer 6 is attached to the front panel of the PDP body 20, the peelable adhesive layer 4 is applied to the electromagnetic wave shielding material 2 along the cut line 9.
The four side edges 11 of the antireflection film 1 adhered by the above are peeled and removed to expose the four side edges of the electromagnetic wave shielding material 2, and then, as shown in FIG. The conductive adhesive tape 30 is fastened so as to reach the side surfaces of the electromagnetic wave shielding light-transmitting laminate 10A and the side surface of the PDP main body 20 and the back surface of the PDP main body 20 from the exposed portion, so that it is simply fitted into the housing. Only with the case, conduction with the housing can be achieved.

The electromagnetic wave shielding light transmitting laminate 10 of FIG.
In B, the outermost antireflection film 1, the near-infrared cut film 3, and the electromagnetic wave shielding material 2 are integrally laminated using the adhesive layers 5 and 4 (the adhesive layer 4 is a peelable adhesive layer). And a laminated body 10 having an adhesive layer 6 as an outermost layer provided on the outer surface of the electromagnetic wave shielding material 2.
b (FIG. 2 (a)), the cut lines 9 were formed by laser processing along the side edges of the antireflection film 1 and the near-infrared cut film 3 so as to reach the electromagnetic wave shielding material 2 along the four side edges. (FIG. 2B).

This electromagnetic wave shielding light transmitting laminate 10B
Then, as shown in FIG. 2 (c), after the adhesive layer 6 is attached to the front panel of the PDP body 20, the peelable adhesive layer 4 is applied to the electromagnetic wave shielding material 2 along the cut line 9.
Then, the four side edges 11 of the near-infrared cut film 3 and the antireflection film 1 adhered to each other are peeled off to expose the four side edges of the electromagnetic wave shielding material 2, and thereafter, as shown in FIG. The conductive adhesive tape 30 is fastened so as to reach from the exposed portion of the electromagnetic wave shielding material 2 to the side surface thereof, the side surface of the PDP main body 20 and the edge of the back surface of the PDP main body 20, and this is simply fitted into the housing. Only with the case, conduction with the housing can be achieved.

The electromagnetic wave shielding light transmitting laminate 10 of FIG.
C is formed by laminating and integrating the antireflection / near-infrared cut film 7 of the outermost layer and the electromagnetic wave shielding material 2 by using the peelable adhesive layer 4, and the outer surface of the electromagnetic wave shielding material 2 has Laminate 10c provided with pressure-sensitive adhesive layer 6
A cut line 9 is formed at the edge of the four sides of FIG. 3 (a) by laser processing so as to reach the electromagnetic wave shielding material 2 on the antireflection film / near-infrared cut film 7 along the side. (FIG. 3B).

This electromagnetic wave shielding light transmitting laminate 10C
Then, as shown in FIG. 3C, the adhesive layer 6 is adhered to the front panel of the PDP main body 20 with the adhesive layer 6, and then along the cut line 9, the peelable adhesive layer 4 is applied to the electromagnetic wave shielding material 2.
Anti-reflection / near-infrared cut film 7 adhered with
The four side edges 11 of the electromagnetic wave shielding material 2 are peeled and removed.
Then, as shown in FIG. 3 (d), the conductive material is extended from the exposed portion of the electromagnetic wave shielding material 2 to the side surface, the side surface of the PDP body 20, and the edge of the back surface of the PDP body 20. By fastening the adhesive tape 30, conduction with the housing can be achieved simply by fitting the adhesive tape 30 into the housing.

The electromagnetic wave shielding light transmitting laminates 10D, 10E, and 10F shown in FIGS. 4, 5, and 6 are respectively shown in FIGS.
Electromagnetic wave shielding light transmitting laminate 10A, 1 of FIGS.
0B and 10C, a transparent substrate 8 is bonded and integrated via an adhesive layer 5 instead of the pressure-sensitive adhesive layer 6 as the backmost layer, and the electromagnetic wave shielding light transmitting laminate 1 shown in FIG.
0D indicates that the outermost anti-reflection film 1, the electromagnetic wave shielding material 2, the near-infrared cut film 3, and the transparent substrate 8 are composed of the adhesive layers 4, 5, and 5 (however, the adhesive layer 4 is a peelable adhesive layer). ) Laminated body 10d which is laminated and integrated using
A cut line 9 is formed in the antireflection film 1 along the side edge of the four side edges of FIG. 4A by laser processing so as to reach the electromagnetic wave shielding material 2 (FIG. 4A).
(B)).

This electromagnetic wave shielding light transmitting laminate 10D
Then, as shown in FIG. 4C, the four side edges of the antireflection film 1 adhered to the electromagnetic wave shielding material 2 by the peelable adhesive layer 4 along the cut lines 9 are peeled off. To expose the four side edges of the electromagnetic wave shielding material 2, and thereafter, a conductive adhesive tape so as to reach the side surface and the edge of the back surface of the electromagnetic wave shielding light transmitting laminate 10 </ b> D from the exposed portion of the electromagnetic wave shielding material 2. By fastening 30, conduction with the housing can be achieved simply by fitting it into the housing.

In the electromagnetic wave shielding light transmitting laminate 10E shown in FIG. 5, an anti-reflection film 1, a near-infrared cut film 3, an electromagnetic wave shielding material 2, and a transparent substrate 8 on the outermost layer are made of adhesive layers 5, 4, and 5 , The adhesive layer 4 is a peelable adhesive layer).
e (FIG. 5 (a)), the cut lines 9 were formed by laser processing along the side edges so as to reach the electromagnetic wave shielding material 2 on the antireflection film 1 and the near-infrared cut film 3 along the four side edges. (FIG. 5B).

This electromagnetic wave shielding light transmitting laminate 10E
Then, as shown in FIG. 5C, the near-infrared cut film 3 and the antireflection film 1 4 adhered to the electromagnetic wave shielding material 2 with the peelable adhesive layer 4 along the cut line 9. Stripping and removing the side edge part 2
Then, the conductive adhesive tape 30 is fastened so as to reach the side edges of the electromagnetic wave shielding material 2 from the exposed portion of the electromagnetic wave shielding material 2 to the edges of the side surface and the back surface of the electromagnetic wave shielding material 10E. By simply fitting this in the housing, conduction with the housing can be achieved.

The electromagnetic wave shielding light transmitting laminate 10F shown in FIG. 6 has an anti-reflection / near infrared cut film 7, an electromagnetic wave shielding material 2 and a transparent substrate 8 on the outermost layer.
5 (however, the adhesive layer 4 is a peelable adhesive layer).
(A) A cut line 9 is formed in the antireflection / near-infrared cut film 7 along the side edge of the four side edges by laser processing so as to reach the electromagnetic wave shielding material 2 (FIG. 6). (B)).

This electromagnetic wave shielding light transmitting laminate 10F
Then, as shown in FIG. 6C, the antireflection / near-infrared cut film 4 adhered to the electromagnetic wave shielding material 2 with the peelable adhesive layer 4 along the cut line 9.
The side edges are peeled and removed to expose the four side edges of the electromagnetic wave shielding material 2, and then reach the edges of the side surfaces and the back surface of the electromagnetic wave shielding light transmitting laminate 10 </ b> F from the exposed portions of the electromagnetic wave shielding material 2. By fixing the conductive adhesive tape 30 as described above, conduction with the housing can be achieved simply by fitting the conductive adhesive tape 30 into the housing.

The components of the electromagnetic wave shielding light transmitting laminates 10A to 10F shown in FIGS. 1 to 6 will be described below.

The anti-reflection film 1 is formed on a base film (thickness is, for example, about 25 to 250 μm) of PET (polyethylene terephthalate), PC (polycarbonate), PMMA (polymethyl methacrylate) or the like. Examples thereof include a layer film and a laminated film of a high-refractive-index transparent film and a low-refractive-index transparent film, for example, a laminated film having a laminated structure as shown in the following (2) to (5). (1) One layer of a transparent film having a lower refractive index than the constituent material of the panel to which the electromagnetic wave shielding light transmitting laminated film is adhered. (2) One high refractive index transparent film and one low refractive index transparent film are added. (3) Two high-refractive-index transparent films and two low-refractive-index transparent films are alternately laminated, each of which is a total of four layers (4) Medium-refractive-index transparent film / High-refractive-index transparent film / Low-refractive index One layer in the order of the transparent film and three layers in total (5) One layer in the order of high-refractive-index transparent film / low-refractive-index transparent film alternately three layers in a total of six layers

The high refractive index transparent film is made of ITO (tin indium oxide) or ZnO or Al-doped Zn.
A thin film having a refractive index of 1.6 or more, such as O, TiO ₂ , SnO ₂ , or ZrO, preferably a transparent conductive thin film can be formed. The high refractive index transparent film may be a thin film in which these fine particles are dispersed in an acrylic or polyester binder. Further, as the low refractive index transparent film, SiO ₂ , Mg
A thin film made of a low-refractive-index material having a refractive index of 1.6 or less, such as F ₂ or Al ₂ O _3, can be formed. As the low refractive index transparent film, a thin film made of a silicon-based or fluorine-based organic material is also suitable. These film thicknesses differ depending on the film configuration, film type, and center wavelength in order to reduce the reflectance in the visible light region due to light interference. However, in the case of a four-layer structure, the first layer (high refractive index) on the panel sticking side is used. Transparent film) is 5 to 50 nm, the second layer (low refractive index transparent film) is 5 to 50 nm, the third layer (high refractive index transparent film) is 50 to 100 nm, and the fourth layer (low refractive index transparent film) is It is formed with a thickness of about 50 to 150 nm.

Further, an anti-contamination film may be further formed on such an anti-reflection film 1 so as to enhance the anti-staining property of the surface. In this case, as the contamination prevention film, a film thickness of 1 to 100 made of a fluorine-based thin film, a silicon-based thin film, or the like
A thin film of about nm is preferred.

The near-infrared cut film 3 is composed of a combination of a base film and two or more near-infrared cut layers as a near-infrared cut layer, preferably two or more layers of near-infrared cut materials. This is preferable because extremely good near-infrared absorption performance can be obtained in a wide range of near-infrared wavelengths.

In the present invention, the near-infrared cut layer can have the following structure. A first near-infrared cut film in which a base film is provided with a coating layer of a first near-infrared cut material,
Combination with a second near-infrared cut film in which a base film is provided with a coating layer of a second near-infrared cut material different from the first near-infrared cut material, a first near-infrared cut on one surface of the base film A near-infrared cut film in which a coating layer of a material is provided and a coating layer of a second near-infrared cut material different from the first near-infrared cut material is provided on the other surface. Near infrared cut film provided by laminating a coating layer of a second near infrared ray cut material different from the first near infrared ray cut material

As the near-infrared cut film 3, a copper-based, phthalocyanine-based, zinc oxide,
Transparent conductive materials such as silver and ITO (indium tin oxide),
One provided with a coating layer of a near-infrared cut material such as a nickel complex type or a diimmonium type can be used. The base film is preferably made of PE
A film made of T, PC, PMMA, or the like can be used. This film is preferably about 10 μm to 1 mm in order to ensure handleability and durability without excessively increasing the thickness of the obtained electromagnetic wave shielding light transmitting laminated film. The thickness of the near-infrared cut coating layer formed on the base film is usually about 0.5 to 50 μm.

In the present invention, a near-infrared cut layer using preferably two or more kinds of the above-mentioned near-infrared cut materials may be provided, and two or more kinds of coating layers may be mixed or laminated. The base film may be coated on both sides separately, or two or more near-infrared cut films may be laminated.

In particular, in the present invention, as the near-infrared cut material, two or more kinds of near-infrared cut materials having different near-infrared cut types as described below are used in combination, without impairing the transparency. It is preferable to obtain infrared cut performance (for example, a performance of sufficiently absorbing near infrared rays in a wide wavelength range of near infrared rays such as 850 to 1250 nm). (A) ITO coating layer having a thickness of 100 to 5000 （(b) Coating layer formed by alternating lamination of ITO and silver having a thickness of 100 to 10000 （(c) Nickel complex system and immonium system having a thickness of 0.5 to 50 μm (D) Coating layer formed by using a suitable transparent binder with a copper compound containing divalent copper ions having a thickness of 10 to 10000 microns (e). An organic dye-based coating layer having a thickness of 0.5 to 50 microns is suitable, but not limited thereto.

In the present invention, for example, a transparent conductive film described later may be further laminated together with the near-infrared cut film.

As the electromagnetic wave shielding material 2, a conductive mesh, an etching mesh, a conductive printing mesh, a transparent conductive film, or the like can be used, and an adhesive layer 6 is provided directly on the back surface of the electromagnetic wave shielding material 2. In the electromagnetic wave shielding light transmitting laminates 10B and 10C shown in FIG. 3, it is preferable to use a transparent conductive film as the electromagnetic wave shielding material 2.

As the conductive mesh, metal fibers and / or
Or, a material made of a metal-coated organic fiber is used, but in the present invention, in order to improve light transmittance and prevent a moire phenomenon,
For example, those having a wire diameter of 1 μm to 1 mm and an aperture ratio of 40 to 95% are preferable. In this conductive mesh, the wire diameter is 1
If it exceeds mm, the aperture ratio will decrease or the electromagnetic wave shielding property will decrease, making it impossible to achieve both. If it is less than 1 μm, the strength as a mesh decreases, and handling becomes extremely difficult. On the other hand, if the aperture ratio exceeds 95%, it is difficult to maintain the shape as a mesh, and if it is less than 40%, the light transmittance is low, and the amount of light from the display is reduced. More preferable wire diameter is 10 to 500 μm, and aperture ratio is 5
0 to 90%.

The aperture ratio of the conductive mesh refers to the ratio of the area occupied by the openings in the projected area of the conductive mesh.

Examples of the metal of the metal fibers and the metal-coated organic fibers constituting the conductive mesh include copper, stainless steel, aluminum, nickel, titanium, tungsten, tin, lead, and the like.
Iron, silver, chromium, carbon or alloys thereof, preferably copper, nickel, stainless steel, and aluminum are used.

As the organic material of the metal-coated organic fiber, polyester, nylon, vinylidene chloride, aramid, vinylon, cellulose and the like are used.

In the present invention, in particular, in order to maintain the above-mentioned aperture ratio and wire diameter, it is preferable to use a conductive mesh made of metal-coated organic fibers having excellent mesh shape maintaining characteristics.

As the etching mesh, a metal film obtained by etching a metal film into an arbitrary shape such as a lattice shape or a punching metal shape by a photolithography technique can be used. As the metal film, PET, PC, P
On a transparent substrate such as MMA, copper, aluminum, stainless steel,
A metal film of chromium or the like formed by vapor deposition or sputtering, or a film in which these metal foils are bonded to a transparent substrate with an adhesive can be used. As the adhesive, an epoxy-based, urethane-based, EVA-based adhesive, or the like is preferable.

It is preferable that black printing is performed on one or both surfaces of these metal films in advance. By using the photolithography technique, the shape and the wire diameter of the conductive portion can be freely designed, so that the aperture ratio can be made higher than that of the conductive mesh.

As the conductive printing mesh, metal particles such as silver, copper, aluminum and nickel or non-metallic conductive particles such as carbon can be used as binders such as epoxy, urethane, EVA, melanin, cellulose and acrylic binders. Can be used by gravure printing, offset printing, screen printing, or the like, and printed on a transparent substrate such as PET, PC, PMMA, or the like in a lattice-like pattern.

As the transparent conductive film, a resin film in which conductive particles are dispersed, or a base film having a transparent conductive layer formed thereon can be used.

The conductive particles dispersed in the film are not particularly limited as long as they have conductivity, and examples thereof include the following. (i) Carbon particles or powder (ii) Nickel, indium, chromium, gold, vanadium, tin, cadmium, silver, platinum, aluminum, copper, titanium, cobalt, lead and other metals or alloys or conductive oxides thereof Particles or powder (iii) Plastic particles such as polystyrene, polyethylene, etc. with a coating layer of the conductive material of (i) or (ii) formed on the surface thereof (iv) Alternating laminate of ITO and silver

The particle size of these conductive particles is preferably 0.5 mm or less, since an excessively large particle size may affect the light transmittance and the thickness of the transparent conductive film. The preferred particle size of the conductive particles is 0.01 to 0.5 mm.

When the mixing ratio of the conductive particles in the transparent conductive film is excessively large, light transmittance is impaired, and when the mixing ratio is excessively small, electromagnetic wave shielding properties are insufficient. The proportion is preferably about 0.1 to 50% by weight, particularly about 0.1 to 20% by weight, especially about 0.5 to 20% by weight.

The color and gloss of the conductive particles are appropriately selected according to the purpose. However, for use as a filter for a display panel, dark and matte materials such as black and brown are preferred. In this case, by adjusting the light transmittance of the filter appropriately by the conductive particles, there is also an effect that the screen becomes easy to see.

Examples of the base film having a transparent conductive layer formed thereon include a transparent conductive layer formed of tin indium oxide, zinc aluminum oxide, or the like by vapor deposition, sputtering, ion plating, CVD, or the like. . In this case, if the thickness of the transparent conductive layer is less than 0.01 μm, the thickness of the conductive layer for shielding electromagnetic waves is too thin,
Sufficient electromagnetic wave shielding properties cannot be obtained, and if it exceeds 5 μm, light transmittance may be impaired.

As the matrix resin of the transparent conductive film or the resin of the base film, polyester, PET, polybutylene terephthalate, PMMA,
Acrylic plate, PC, polystyrene, triacetate film, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl butyral, metal ion crosslinked ethylene-methacrylic acid copolymer, polyurethane, cellophane, etc. Preferably, PET, PC and PMMA are mentioned.

The thickness of such a transparent conductive film is
Usually, it is about 1 μm to 5 mm.

As the anti-reflection / near-infrared cut film 7, a film in which the above-mentioned near-infrared cut layer is formed on the above-described base film, and the above-described anti-reflection layer is further laminated thereon is used.

The adhesive resin constituting the adhesive layer 5 includes
Those which are transparent and elastic, for example, those which are usually used as an adhesive for laminated glass are preferred.

Specific examples of the resin of the film having such elasticity include ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene- (meth)
Acrylic acid copolymer, ethylene-ethyl (meth) acrylate copolymer, ethylene-methyl (meth) acrylate copolymer, metal ion crosslinked ethylene- (meth) acrylic acid copolymer, partially saponified ethylene-vinyl acetate Copolymer, carboxylethylene-vinyl acetate copolymer, ethylene-
Ethylene-based copolymers such as (meth) acryl-maleic anhydride copolymer and ethylene-vinyl acetate- (meth) acrylate copolymer may be mentioned ("(meth) acryl" means "acryl or methacryl"). Shown). In addition, polyvinyl butyral (PVB) resin, epoxy resin, acrylic resin, phenol resin, silicone resin, polyester resin, urethane resin, etc. can also be used, but the most balanced in terms of performance and the easy-to-use one is ethylene-vinyl acetate It is a copolymer (EVA). Further, PVB resins used in laminated glass for automobiles are also suitable in terms of impact resistance, penetration resistance, adhesiveness, transparency and the like.

The thickness of the adhesive layer 5 is, for example, 10 to 100.
About 0 μm is preferable. Since the near-infrared cut layer is weak to heat and cannot withstand the heat crosslinking temperature (130 to 150 ° C.), the near-infrared cut film 3 and the antireflection / near-infrared cut film 7 may be laminated using an adhesive. . However, a low-temperature cross-linkable EVA (cross-linking temperature of about 70 to 130 ° C.) can be used for bonding the near-infrared cut film 3 and the antireflection / near-infrared cut film 7.

The adhesive layer 5 may further contain a small amount of an ultraviolet absorber, an infrared absorber, an antioxidant, and a paint processing aid, and may further contain a dye, Colorants such as pigments, and fillers such as carbon black, hydrophobic silica, and calcium carbonate may be added in appropriate amounts.

The adhesive sheet for forming the adhesive layer 5 is prepared by mixing an adhesive resin and the above-mentioned additives, kneading the mixture with an extruder, a roll, or the like, and then forming a film using a calender, roll, T-die extrusion, inflation, or the like. It is manufactured by forming a sheet into a predetermined shape by a method. At the time of film formation, embossing is applied to prevent blocking and facilitate degassing during pressure bonding. As means for improving the adhesiveness, means such as corona discharge treatment, low-temperature plasma treatment, electron beam irradiation, and ultraviolet light irradiation on the bonding sheet are also effective.

The releasable adhesive of the releasable adhesive layer 4 may be the same as the above-mentioned adhesive layer 5, but it is preferable to select an adhesive having a slightly lower adhesive strength. Note that an adhesive layer may be provided instead of the peelable adhesive layer.

As the pressure-sensitive adhesive (pressure-sensitive adhesive) for the pressure-sensitive adhesive layer 6, a thermoplastic elastomer such as acrylic, SBS, SEBS or the like is preferably used. To these pressure-sensitive adhesives, tackifiers, ultraviolet absorbers, coloring pigments, coloring dyes, antioxidants, adhesion-imparting agents, and the like can be appropriately added. The thickness of the pressure-sensitive adhesive layer 6 is preferably about 10 to 1000 μm. Note that an appropriate release paper (film) is attached to the adhesive layer 6.

The constituent materials of the transparent substrate 8 are glass,
Polyester, PET, polybutylene terephthalate,
PMMA, acrylic plate, PC, polystyrene, triacetate film, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyethylene, ethylene-vinyl acetate copolymer, polyvinyl butyral, metal ion cross-linked ethylene-methacrylic acid copolymer, polyurethane, Cellophane or the like, preferably glass, PET, P
C and PMMA.

The thickness of the transparent substrate 8 is appropriately determined according to the required characteristics (for example, strength and light weight) of the obtained electromagnetic wave shielding light transmitting laminate according to the intended use. The range is preferably 1 to 4 mm.

The transparent substrate 8 may be provided with a heat reflection coating such as a metal thin film or a transparent conductive film to enhance the functionality.

The conductive adhesive tape 30 is provided with an adhesive layer in which conductive particles are dispersed on one surface of a metal foil. This adhesive layer includes an acrylic, rubber, or silicon-based adhesive. Adhesives, epoxy or phenolic resins mixed with a curing agent can be used.

The conductive particles dispersed in the adhesive layer include:
As long as it is an electrically good conductor, various conductors can be used. For example, metal powder such as copper, silver, and nickel, resin or ceramic powder coated with such a metal can be used. There is no particular limitation on the shape, and any shape such as a scale shape, a tree shape, a granular shape, and a pellet shape can be adopted.

The compounding amount of the conductive particles is preferably 0.1 to 15% by volume based on the polymer constituting the adhesive layer, and the average particle size is preferably 0.1 to 100 μm. . As described above, by defining the blending amount and the particle size, it is possible to prevent the conductive particles from condensing and obtain good conductivity.

As the metal foil serving as the base material of the conductive pressure-sensitive adhesive tape, a foil of copper, silver, nickel, aluminum, stainless steel, or the like can be used.
It is about 100 μm.

The pressure-sensitive adhesive layer is prepared by uniformly mixing the above-mentioned pressure-sensitive adhesive and conductive particles at a predetermined ratio with this metal foil, and is provided with a roll coater, a die coater, a knife coater, a my cover coater, a flow coater, a spray coater and the like. It can be easily formed by coating.

The thickness of the adhesive layer is usually 5 to 100
It is about μm.

In the present invention, there is no particular limitation on the means for forming the score lines, but it can be easily incorporated into a continuous production line and can be processed with high accuracy without damaging the electromagnetic wave shielding material. It is preferable to use an infrared laser, a CO ₂ laser (10.6 μm) or a YAG laser (1.064 μm). For example, C
By irradiating 5 to 15 times with an O ₂ laser (output of 3 to 7 W) at a scanning speed of about 10 m / min, the score line can be processed.

The cut lines need not necessarily be provided on the four sides of the electromagnetic wave shielding light transmitting laminate, and may be provided only on the two opposite sides. However, in order to stably obtain uniform and good conduction. , Preferably on the four sides.

The electromagnetic wave shielding light transmitting laminate of the present invention having such a cut line is a continuous sheet of a laminated sheet for laminating a film constituting a laminate, an electromagnetic wave shielding material, and the like via an adhesive layer and bonding and integrating them. In the production line, cut lines are cut continuously by laser processing on both sides of the continuously produced strip-shaped laminated sheet, and cut lines are cut at predetermined intervals in the width direction of the sheet, and then cut into appropriate lengths By doing so, it can be easily manufactured.

If the position of the cut line is excessively close to the side edge of the electromagnetic wave shielding light transmitting laminate, the width of the exposed portion of the electromagnetic wave shielding material is too narrow to achieve good conduction. However, if the width is too large, the effective area of the electromagnetic wave shielding light-transmitting laminate becomes narrower, so it depends on the size of the electromagnetic wave shielding light-transmitting laminate. 5-30m from the side edge
It is preferable that a cut line is formed at a position of about m so that the exposed portion of the electromagnetic wave shielding material is formed over such a width.

In FIGS. 1 to 6, the conductive electrodes are formed by a conductive pressure-sensitive adhesive tape. However, the electrodes are not limited to the conductive pressure-sensitive adhesive tape, and may be formed by applying a conductive paste. good. Also, this electrode may be formed so as to cover the exposed surface of the electromagnetic wave shielding material. As shown in FIGS. 1 to 6, it is not necessary to extend the electrode to the back surface of the PDP body or the transparent substrate. In view of the above, it is preferable to wrap around the back side in this way. Also, a conductive adhesive tape may be provided so as to reach the edge of the front surface of the electromagnetic wave shielding light transmitting laminate.

The electromagnetic wave shielding light transmitting laminate shown in FIGS. 1 to 6 shows an example of the embodiment of the present invention, and the present invention is not limited to the one shown in the drawings unless it exceeds the gist of the present invention. Instead, various other aspects can be adopted for the constituent materials of the laminate.

Such an electromagnetic-shielding light-transmitting laminate of the present invention can be easily mounted on an object to be mounted, and good conduction with the housing can be uniformly obtained at the peripheral edge or the side edge. . Therefore, a good electromagnetic wave shielding effect can be obtained.

The electromagnetic wave shielding light transmitting laminate of the present invention is used as an electromagnetic wave shielding light transmitting film to be attached to a PDP panel, or as a window material in a place where precision equipment is installed such as a hospital or a laboratory. It is extremely suitable as an electromagnetic wave shielding light transmitting film or the like to be adhered to a dense material.

[0083]

As described above in detail, according to the present invention, it is easy to assemble into a housing, uniform and good conduction to the housing can be achieved, and mass production can be performed on a continuous production line. An electromagnetic wave shielding light transmitting laminate capable of performing the above is provided, and a favorable electromagnetic wave shielding light transmitting structure can be designed by using the electromagnetic wave shielding light transmitting laminate.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an electromagnetic wave shielding light transmitting laminate and a method of mounting the same according to the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the electromagnetic wave shielding light transmitting laminate of the present invention and a method of mounting the same.

FIG. 3 is a cross-sectional view showing another embodiment of the electromagnetic wave shielding light transmitting laminate of the present invention and a method of mounting the same.

FIG. 4 is a cross-sectional view showing different embodiments of the electromagnetic wave shielding light transmitting laminate of the present invention and a method of mounting the same.

FIG. 5 is a cross-sectional view showing different embodiments of the electromagnetic wave shielding light transmitting laminate of the present invention and a method of mounting the same.

FIG. 6 is a cross-sectional view showing different embodiments of the electromagnetic wave shielding light transmitting laminate of the present invention and a method of mounting the same.

[Explanation of symbols]

Reference Signs List 10A, 10B, 10C, 10D, 10E, 10F Electromagnetic wave shielding light transmitting laminate 1 Antireflection film 2 Electromagnetic wave shielding material 3 Near infrared cut film 4 Peelable adhesive layer 5 Adhesive layer 6 Adhesive layer 7 Antireflective / Near Infrared cut film 8 Transparent substrate 9 Cut line 20 PDP body 30 Conductive adhesive tape

 ──────────────────────────────────────────────────続 き Continued on front page F-term (reference) 4F100 AB01 AG00 AK42 BA02 BA03 BA10A BA10C CB05 CB05C DB01A DC13A DE01 EJ323 EJ52A JD08A JD10B JG01 JL02 JL13 JL13C JL14 JN01B JN01C JN06B5A05A11A11A11A BB44 CC16 GG05 GH01 5G435 AA17 BB06 GG11 GG33 HH02 KK07

Claims (6)

[Claims] 1. An electromagnetic wave shielding light transmitting laminate comprising an electromagnetic wave shielding material and a transparent film covering the surface thereof laminated and integrated with a peelable adhesive or pressure-sensitive adhesive. An electromagnetic wave shielding light transmitting laminate, wherein a cut line is provided in the transparent film along an edge of a side of the laminate. 2. The electromagnetic wave shielding light transmitting laminate according to claim 1, wherein the cut lines are formed by laser processing. 3. The electromagnetic wave shielding light transmitting laminate according to claim 1, wherein the transparent film is an antireflection film or an antireflection / near infrared cut film. 4. The electromagnetic wave shielding light transmitting laminate according to claim 1, wherein an adhesive layer is provided as a rearmost layer. 5. The electromagnetic wave shielding light transmitting laminate according to claim 1, wherein a transparent substrate is provided as a rearmost layer. 6. A method for mounting the electromagnetic wave shielding light transmitting laminate according to any one of claims 1 to 5 on a member to be mounted, wherein the electromagnetic wave shielding light transmitting laminate is a member to be mounted. Mounting or mounting the electromagnetic wave shielding light transmitting laminate, characterized in that the electromagnetic wave shielding material is exposed by peeling off the edge of the transparent film along the cut line after or before the arrangement. Method.