TW202138844A - Scattering-resistant adhesive sheet and display device wherein the scattering-resistant adhesive sheet is disposed on a surface side of a protection panel of a display device and includes a base material and a coloring adhesive layer - Google Patents

Abstract

An object of the present invention is to provide a scattering-resistant adhesive sheet that helps improve the design of a display device, and a display device with improved design. The solution of the present invention is a scattering-resistant adhesive sheet 1 disposed on at least one surface side of a protection panel 2 used for a display device. The scattering-resistant adhesive sheet comprises a base material 11 and a coloring adhesive layer 12. The scattering-resistant adhesive sheet 1 preferably has brightness L*, defined by the CIE1976 L*a*b color system, of less than 92. The total image sharpness of 0.125mm, 0.25mm, 0.5mm, 1.0mm, and 2.0mm optical frequency combs measured in accordance with JIS K7374:2007 is preferably greater than 400, and the total light transmittance is preferably greater than 5% and less than 95%.

Description

Anti-scattering adhesive sheet and display

The present invention relates to an anti-scattering adhesive sheet provided on at least one surface side of a protective panel used for a display, and a display including the anti-scattering adhesive sheet.

Displays in recent years, such as automotive displays such as instrument panels, car navigation systems, various instruments installed in consoles, and those used by general users Display devices such as liquid crystal display devices or organic electroluminescence elements are often used in displays such as tablet computers, displays such as commercial tablet computers or digital signage, and displays such as outdoor digital signage.

In the above-mentioned displays for automobiles, when the display is closed, it may be necessary to express a sense of integrity with the peripheral parts of the display, such as frame materials, in order to improve the design. For this reason, in consideration of coloring the display, for example, Patent Documents 1 to 4 disclose inventions related to coloring the display. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2000-313871 [Patent Document 2] Japanese Patent Laid-Open No. 2009-188298 [Patent Document 3] Japanese Patent Laid-Open No. 2012-234028 [Patent Document 4] Japanese Patent Laid-Open No. 2017-57375

[The problem to be solved by the invention]

However, the technologies disclosed in Patent Documents 1 to 4 mentioned above all have different coloring purposes, and therefore cannot give the display a sense of integrity with peripheral components to improve design.

On the other hand, there is a problem in that when a mobile monitor is dropped due to a drop, or a car monitor receives a significant impact due to an accident, etc., the protective panel is broken and the fragments are scattered. Therefore, a solution has been proposed to attach the anti-scattering adhesive sheet to the protective panel to prevent the protective panel from being broken and scattered.

In view of the above situation, the purpose of the present invention is to provide an anti-scattering adhesive sheet that can improve the design of the display, and a display with improved design. [Means used to solve the problem]

In order to achieve the above object, first of all, the present invention provides an anti-scattering adhesive sheet, which is an anti-scattering adhesive sheet provided on at least one surface side of a protective panel used in a display, and includes a substrate and a colored adhesive layer (Invention 1 ).

Since the anti-scattering adhesive sheet according to the above invention (Invention 1) has a colored adhesive layer, a display obtained by disposing the anti-scattering adhesive sheet on at least one surface side of the protective panel, for example, is connected to the frame material of the display when closed. Peripheral components, frame-shaped printing layer, and printing layer displaying characters and symbols, etc. have good coordination in appearance, which in turn improves the design. Furthermore, even if the protective panel is broken due to impact or the like, by attaching the anti-scattering adhesive sheet to the protective panel, the broken protective panel can be prevented from scattering.

In the above invention (Invention 1), the lightness L* defined by the CIE1976 L*a*b* color system is preferably 92 or less (Invention 2).

In the above inventions (Inventions 1 and 2), the sum of the image sharpness of the 0.125mm, 0.25mm, 0.5mm, 1.0mm and 2.0mm optical frequency combs measured in accordance with JIS K7374:2007 is preferably 400 or more (invention 3).

In the above inventions (Inventions 1 to 3), the total light transmittance is preferably 5% or more and 95% or less (Invention 4).

In the above inventions (Inventions 1 to 4), the adhesive constituting the colored adhesive layer preferably contains a coloring agent (Invention 5).

In the above inventions (Inventions 1 to 5), the aforementioned substrate is preferably a plastic film having a functional layer (Invention 6).

Secondly, the present invention provides a display including a protective panel, wherein the anti-scattering adhesive sheet (Inventions 1 to 6) is provided on one or both surface sides of the protective panel (Invention 7).

In the above invention (Invention 7), it is preferable to have a frame material on the surrounding portion (Invention 8).

In the above inventions (Inventions 7 and 8), it is preferable that a printing layer is formed on a part of a display component constituting the aforementioned display (Invention 9). [Effects of the invention]

According to the anti-scattering adhesive sheet of the present invention, the design of the display can be improved. Furthermore, the display body according to the present invention has improved design due to the anti-scattering adhesive sheet.

Hereinafter, an embodiment of the present invention will be described. [Anti-scattering adhesive sheet] The anti-scattering adhesive sheet according to an embodiment of the present invention is provided on at least one surface side of a protective panel used for a display, and includes a substrate and a colored adhesive layer. The details of the display and the protection panel will be described later.

According to the anti-scattering adhesive sheet of this embodiment, since it has the colored adhesive layer as described above, a display obtained by arranging the anti-scattering adhesive sheet on at least one surface side of the protective panel, for example, is connected to the display when closed. Peripheral components such as frame materials, frame-shaped printed layers, and printed layers that display text symbols, etc., have good coordination in appearance, which in turn improves the design. Furthermore, even if the protective panel is broken due to impact or the like, by attaching the anti-scattering adhesive sheet to the protective panel, the broken protective panel can be prevented from scattering.

The lightness L* defined by the CIE1976 L*a*b* color system of the anti-scattering adhesive sheet is preferably 92 or less, preferably 86 or less, particularly preferably 83 or less, and more preferably 80 or less. In this way, when the display is closed, it is possible to give the display a sense of integrity with the black frame material and the printed layer, thereby improving the appearance coordination.

On the other hand, from the viewpoint of improving the design and visibility of the display through appearance coordination, the lower limit of the brightness L* is preferably 10 or more, preferably 20 or more, and 40 or more. Particularly preferred, more preferably 50 or more, and more preferably 60 or more. In addition, the measurement methods of lightness L*, chromaticity a*, and b* defined by the CIE1976 L*a*b* color system in this specification are as described in the test examples described later.

Furthermore, the chromaticity a* defined by the CIE1976 L*a*b* color system of the aforementioned anti-scattering adhesive sheet is preferably -20-20 or less, preferably -10-10, and -5-5 Particularly preferable, -2 to 2 is more preferable, and -1.5 to 1.5 is the best. By setting the chromaticity a* within the above range, the visibility of the display becomes better, and the design, especially the appearance coordination of the car display, will be further improved.

Moreover, the chromaticity b* defined by the CIE1976 L*a*b* color system of the anti-scattering adhesive sheet is preferably -20-20 or less, preferably -10-10, and particularly -5-5. Preferably, -2 to 2 is more preferable, and -1.2 to 1.2 is the most preferable. By setting the chromaticity b* within the above range, the visibility of the display becomes better, and the design, especially the appearance coordination of the car display, is further improved.

According to the anti-scattering adhesive sheet of this embodiment (without release sheet), the optical frequency comb measured according to JIS K7374:2007 is 0.125mm, 0.25mm, 0.5mm, 1.0mm, and 2.0mm. The image clarity (%) The sum of is preferably 400 or more, preferably 405 or more, particularly preferably 410 or more, and more preferably 415 or more. In this way, the visibility of the image/movie in the obtained display becomes better. In particular, even if the brightness L* is within the aforementioned range, the image/movie of the display can maintain good visibility.

On the other hand, the sum of the above-mentioned image definition (%) is preferably 500 or less, preferably 450 or less, particularly preferably 430 or less, and more preferably 420 or less. In this way, while the display image/movie maintains good visibility, the lightness L* becomes easily within the aforementioned range.

Here, the image clarity is measured by measuring the amount of parallel light transmitted from the test object through an optical frequency comb having a transmission part and a light-shielding part. The smaller the width (comb width) between the transmissive part and the light-shielding part in the optical frequency comb, the higher the image quality and the sharpness of the image. The image clarity is measured according to the transmission method of JIS K7374:2007. The specific measurement method is as described in the test example described later.

The total light transmittance of the anti-scatter adhesive sheet (without release sheet) according to this embodiment is preferably 5% or more, more preferably 20% or more, particularly preferably 30% or more, and more preferably 40% or more good. In this way, the visibility of the image/movie of the obtained display becomes good, and in particular, it is possible to prevent the boundary between the black display portion and the portion other than the black display portion from becoming unclear when the obtained display is turned on. . The upper limit of the total light transmittance is not particularly limited. It is usually 100% or less. When considering the relationship with the lightness L*, it is preferably 95% or less. When imparting a black tone property, it is preferably 85% or less, particularly preferably 75% or less, more preferably 65% or less, and most preferably 60% or less. In addition, the total light transmittance in this specification is a value measured in accordance with JIS K7361-1:1997.

In addition, the degree of coloration (coloring density distribution) in the anti-scattering adhesive sheet (colored adhesive layer) according to the present embodiment is preferably uniform in the plane direction. As a result, the design (especially the coordination of appearance) and visibility of the display becomes better.

FIG. 1 illustrates a specific structure as an example of the anti-scatter adhesive sheet according to this embodiment. As shown in FIG. 1, the anti-scatter adhesive sheet 1 is composed of a base material 11, a colored adhesive layer 12 laminated on one surface of the base material 11, and a surface of the colored adhesive layer 12 on the opposite side of the base material 11 On the release sheet 13 constituted. The colored adhesive layer 12 is in contact with the peeling surface of the peeling sheet 13. In addition, in this specification, the peeling surface of the peeling sheet means the surface that has peelability in the peeling sheet, and it also includes any surface that has been subjected to a peeling treatment and a surface that can exhibit peelability without a peeling treatment. One.

1. Parts 1-1. Substrate As the base material 11, what is necessary is just to be comprised by the material which has the strength which can prevent the protective panel (fragment of glass or plastic) from scattering when the protective panel of an adherend is broken. The base material 11 is usually mainly composed of a plastic film as the main body, and may also be composed of only a plastic film, or may be a base material on which a desired functional layer is formed on the plastic film.

Examples of plastic films include polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyurethane films, polyethylene films, and polypropylene films. Film, cellulose film such as triacetyl cellulose, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polystyrene film, polycarbonate film, acrylic Plastic films such as resin films, Norbornene resin films, cycloolefin resin films, etc.; laminates of two or more of the above, etc. The plastic film can also be a uniaxially stretched or biaxially stretched plastic film.

Among the above-mentioned plastic films, so-called optical films are preferred. Specifically, a plastic film with a haze value of less than 1% is preferred. When the haze value is less than 1%, the visibility of the obtained display becomes better. As such an optical film, polyethylene terephthalate, triacetyl cellulose film, polycarbonate film, cycloolefin resin film, etc. are preferable.

Furthermore, in the above-mentioned plastic film, in order to improve the adhesion with the film layers (colored adhesive layer 12, functional layer, etc.) laminated on the surface thereof, a primer can be used as required. Treatment, oxidation method, embossing method, etc., apply surface treatment to one or both sides. Examples of the oxidation method include corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, ozone/ultraviolet treatment, etc., and examples of the unevenness method include sandblast method and solvent treatment. Law and so on. These surface treatment methods can be appropriately selected according to the type of plastic film.

As the function of the above-mentioned functional layer, for example, hard coat properties, anti-glare properties, anti-fingerprint properties, slippery properties, antistatic properties, writing degree improvement properties, anti-Newton ring properties, and anti-Newton ring properties can be cited. ) Sex, high transparency, etc. The above-mentioned functional layer may have a plurality of these functions. In addition, these functions may differ according to the case where the anti-scattering adhesive sheet 1 is provided on the front side of a protective panel, and the case where it is provided on the back side.

As the above-mentioned functional layer, a hard coat layer is preferable from the viewpoint of improving the anti-scattering property, and it may be a hard coat layer having functions other than the hard coat property. For example, when the anti-scattering adhesive sheet 1 is provided on the front side of the protective panel, a hard coat layer having anti-fingerprint properties, anti-glare properties, writing degree improvement properties, slippery properties, high transparency, antistatic properties, etc. Better. Furthermore, when the anti-scatter adhesive sheet 1 is provided on the back side of the protective panel, a hard coat layer having anti-Newtonian ring properties, anti-glare properties, high transparency, antistatic properties, and the like is preferable.

In addition, the base material 11 in this embodiment preferably does not have an anti-reflection layer. When an anti-reflection layer is provided, the hardness of the surface may be reduced, and the desired appearance coordination may not be obtained.

The hard coat layer is generally formed by curing a coating composition containing an active energy ray curable compound as an essential component and containing a leveling agent, a filler, a photopolymerization initiator, and the like as required. As the active energy ray-curable compound, it is preferable to use a polyfunctional (meth)acrylate. In addition, in this specification, the (meth)acrylate type means both acrylate and methacrylate. The same goes for other similar terms.

From the viewpoint of improving the anti-scattering property, the thickness of the hard coat layer is preferably 0.5-20 μm, particularly preferably 1-10 μm, and more preferably 1.5-5 μm.

From the standpoint of anti-scattering properties and suppression of sink marks, the thickness of the substrate 11 (including the functional layer in the case of having a functional layer) is preferably 10 μm or more, more preferably 20 μm or more, and particularly 40 μm or more. Preferably, 80 μm or more is more preferable, and 105 μm or more is the most preferable. On the other hand, from the standpoints of roll-to-roll and other processability and the thinning of displays, the thickness is preferably 200 μm or less, particularly preferably 150 μm or less, and 130 μm or less. Better.

From the standpoint of anti-scattering properties and suppression of sink marks, the tensile modulus of elasticity of the base material 11 (including the functional layer when it has a functional layer) is preferably 1.5 GPa or more, and particularly preferably 3.0 GPa or more. , And more preferably 4.0GPa or more. On the other hand, from the viewpoint of shrinkage of the substrate, the above-mentioned tensile modulus is preferably 6.5 GPa or less, and particularly preferably 6.0 GPa or less.

1-2. Colored adhesive layer The type of adhesive constituting the colored adhesive layer 12 of the anti-scattering adhesive sheet 1 according to the present embodiment is not particularly limited. For example, it may be an acrylic adhesive, a polyester adhesive, a polyurethane adhesive, and a rubber adhesive. , Any one of silicone adhesives, etc. Furthermore, the adhesive may be any one of emulsion type, solvent type or solvent-free type, and may also be any one of cross-linked type or non-cross-linked type. Among them, acrylic adhesives, polyurethane adhesives or silicone resin adhesives having excellent adhesive properties, optical properties, etc. are preferred, and acrylic adhesives are particularly preferred.

(A) Acrylic adhesive The acrylic adhesive may be an active energy ray-curable adhesive or an active energy ray non-curable adhesive. Furthermore, as acrylic adhesives, cross-linked adhesives are preferred, and thermally cross-linked adhesives are more preferred.

Specifically, an adhesive composition containing a (meth)acrylate polymer (A), a crosslinking agent (B), and a coloring agent (C) (hereinafter sometimes referred to as "adhesive composition P") Crosslinking is preferably performed to obtain the acrylic adhesive in this embodiment. Furthermore, when an active energy ray-curable adhesive is used as the above-mentioned adhesive, the adhesive composition P preferably further contains an active energy ray-curable component (D).

The adhesive obtained from the above-mentioned adhesive composition P can exhibit excellent optical properties, adhesion, anti-scattering properties, and the like. In addition, in this specification, the (meth)acrylic system means both acrylic acid and methacrylic acid. The same goes for other similar terms. Furthermore, "polymer" also includes the concept of "copolymer".

(1) Components of the adhesive composition (1-1) (Meth)acrylate polymer (A) The (meth)acrylate polymer (A) in this embodiment includes a reactive group-containing monomer having a reactive group that reacts with the crosslinking agent (B) in the molecule as the monomer constituting the polymer. Body unit is better. The reactive group derived from this reactive group-containing monomer reacts with the crosslinking agent (B) to form a crosslinked structure (three-dimensional network structure), and in turn, an adhesive with desired cohesion can be obtained.

Examples of the above-mentioned reactive group-containing monomers include monomers having a hydroxyl group in the molecule (hydroxyl-containing monomers), monomers having a carboxyl group in the molecule (carboxyl group-containing monomers), and monomers having an amine group in the molecule. (Amino group-containing monomer) etc. are preferred. Among them, a hydroxyl group-containing monomer or a carboxyl group-containing monomer having excellent reactivity with the crosslinking agent (B) is preferred, and a combination of a hydroxyl group-containing monomer and a carboxyl group-containing monomer can also be used together.

Examples of hydroxyl-containing monomers include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, and 2-hydroxypropyl (meth)acrylate. Hydroxyalkyl (meth)acrylates such as butyl ester, 3-hydroxybutyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, and the like. Among them, from the viewpoint of the reactivity of the hydroxyl group in the obtained (meth)acrylate polymer (A) with the crosslinking agent (B) and the copolymerizability with other monomers, and the dispersion with the coloring agent (C) From the viewpoint that the performance can be improved, a hydroxyalkyl (meth)acrylate having a hydroxyalkyl group having 1 to 4 carbon atoms is preferred. Specifically, for example, 2-hydroxyethyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, etc. are preferred, and 2-hydroxyethyl acrylate or 4-hydroxyethyl acrylate can be cited. Hydroxybutyl ester is particularly preferred. The above-mentioned materials may be used alone or in combination of two or more kinds.

Examples of carboxyl group-containing monomers include ethylenically unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, and citraconic acid. Among them, considering the reactivity of the carboxyl group in the obtained (meth)acrylate polymer (A) with the crosslinking agent (B) and the copolymerizability with other monomers, acrylic acid is preferred. The above-mentioned materials may be used alone or in combination of two or more kinds.

Examples of the amine group-containing monomer include aminoethyl (meth)acrylate, n-butylaminoethyl (meth)acrylate, and the like. The above-mentioned materials may be used alone or in combination of two or more kinds.

In the (meth)acrylate polymer (A), as the monomer unit constituting the polymer, the lower limit of the content of the reactive group-containing monomer is preferably 1% by mass or more, and 3% by mass or more It is particularly preferable, and 10% by mass or more is more preferable. In the case where the reactive group-containing monomer includes only hydroxyl-containing monomers, it is preferable to contain 15% by mass or more, and to contain 20% by mass or more. Especially good. Furthermore, in the (meth)acrylate polymer (A), as the monomer unit constituting the polymer, the upper limit of the content of the reactive group-containing monomer is preferably 35 mass% or less, and 30 Mass% or less is particularly preferred, and 25 mass% or less is more preferred. When the (meth)acrylate polymer (A) contains a reactive group-containing monomer as a monomer unit in the above content, a good crosslinked structure will be formed in the resulting adhesive, and the desired cohesion and adhesion can be obtained sex. In this way, since the obtained adhesive has predetermined adhesiveness, even if it receives an impact, the impact can be mitigated and the protective panel can be prevented from being broken, and even if the protective panel is broken, the scattering of the fragments can be suppressed. Furthermore, since it has excellent adhesion with the base material constituting the anti-scattering adhesive sheet, even if the fragments penetrate the adhesive layer and reach the base side, the anti-scattering adhesive sheet itself can be prevented from tearing. Furthermore, the dispersibility of the coloring agent (C) in the adhesive tends to become better, and the resulting adhesive has good reproducibility and uniformity for the above-mentioned optical properties, and can provide more excellent design and discrimination. Visual.

Furthermore, it is also preferable that the (meth)acrylate polymer (A) does not contain a carboxyl group-containing monomer as a monomer unit constituting the polymer. Since the carboxyl group is an acid component, by not containing a carboxyl group-containing monomer, it is possible to prevent defects in the object to be attached to the adhesive due to acid, for example, even when there is a transparent conductive film such as indium tin oxide (ITO) or a metal film. It can also suppress those problems caused by acid (corrosion, resistance change, etc.). However, it is acceptable to contain a predetermined amount of the carboxyl group-containing monomer to the extent that the above-mentioned defects are not caused. Specifically, in the (meth)acrylate polymer (A), the allowable content of the carboxyl group-containing monomer as a monomer unit is 0.1% by mass or less, preferably 0.01% by mass or less, and 0.001% by mass or less For better.

The (meth)acrylate polymer (A) preferably contains an alkyl (meth)acrylate as a monomer unit constituting the polymer. In this way, good adhesion can be produced. The alkyl group may be linear or branched.

As the alkyl (meth)acrylate, from the viewpoint of adhesiveness, an alkyl (meth)acrylate having an alkyl group with 1 to 20 carbon atoms is preferred. Examples of alkyl (meth)acrylates having 1 to 20 carbon atoms in the alkyl group include methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, N-Butyl (meth)acrylate, n-pentyl (meth)acrylate, n-hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isooctyl (meth)acrylate, (methyl) ) N-decyl acrylate, n-dodecyl (meth)acrylate, myristyl (meth)acrylate, palmityl (meth)acrylate, stearyl (meth)acrylate, etc. Among them, from the viewpoint of further improving the adhesiveness, (meth)acrylates having an alkyl group of 1 to 8 carbon atoms are preferred, and methyl (meth)acrylate and n-butyl (meth)acrylate are preferred. Or 2-ethylhexyl (meth)acrylate is particularly preferred, and methyl acrylate, methyl methacrylate, n-butyl acrylate or 2-ethylhexyl acrylate is more preferred. In addition, the above-mentioned materials may be used alone or in combination of two or more kinds.

In the (meth)acrylate polymer (A), as the monomer unit constituting the polymer, the content of the alkyl (meth)acrylate is preferably 45% by mass or more, particularly preferably 55% by mass or more , And more preferably 65% by mass or more. When the lower limit of the content of the alkyl (meth)acrylate is as described above, the (meth)acrylate polymer (A) can exhibit appropriate adhesiveness. Furthermore, the dispersibility of the colorant (C) in the adhesive tends to become good, and the (meth)acrylate polymer (A) does not impair the desired adhesiveness. In this way, the obtained adhesive can exhibit appropriate adhesiveness, and at the same time, the reproducibility and uniformity of the aforementioned optical properties are also improved, and more excellent design and visibility can be imparted.

On the other hand, in the (meth)acrylate polymer (A), as the monomer unit constituting the polymer, the content of the alkyl (meth)acrylate is preferably 99% by mass or less, and 95% by mass The following are particularly preferred, and 90% by mass or less is more preferred. Furthermore, in the case where a hydroxyl group-containing monomer is included as a monomer constituting the polymer, the content of the alkyl (meth)acrylate as a monomer unit constituting the polymer is preferably 85% by mass or less, And it is especially preferable that it is 80 mass% or less. When the upper limit of the content of the alkyl (meth)acrylate is as described above, other monomer components such as reactive functional group-containing monomers can be incorporated into the (meth)acrylate polymer (A) in an appropriate amount middle.

In the above-mentioned (meth)acrylate polymer (A), a monomer having an alicyclic structure (alicyclic structure-containing monomer) is preferably contained in the molecule as a monomer unit constituting the polymer. Since the alicyclic structure-containing monomer has a large volume, it can be inferred that the presence of the monomer in the polymer increases the distance between the polymers, which can make the resulting adhesive have excellent flexibility. In this way, the anti-scattering property of the adhesive itself becomes excellent.

The carbocyclic ring having an alicyclic structure in the alicyclic structure-containing monomer may be a carbocyclic ring having a saturated structure or a carbocyclic ring having a part of unsaturated bonds. Furthermore, the alicyclic structure may be a monocyclic alicyclic structure, or a polycyclic alicyclic structure such as a bicyclic ring or a tricyclic ring. From the standpoint of keeping a proper distance between the obtained (meth)acrylate polymers (A) and imparting high stress relaxation properties by an adhesive, the above-mentioned alicyclic structure is a polycyclic alicyclic structure (Multi-ring structure) is better. Moreover, considering the mutual solubility between the (meth)acrylate polymer (A) and other components, the above-mentioned polycyclic structure is particularly preferably bicyclic to tetracyclic. Furthermore, as described above, from the viewpoint of imparting stress relaxation properties, the number of carbon atoms in the alicyclic structure (means the total number of carbon atoms in the part forming the ring, and the plural rings are independent of each other) The following is the total number of carbon atoms.) Generally, 5 or more is preferred, and 7 or more is particularly preferred. On the other hand, the upper limit of the number of carbon atoms in the alicyclic structure is not particularly limited, and as described above, from the viewpoint of mutual solubility, 15 or less is preferable, and 10 or less is particularly preferable.

Specific examples of the above-mentioned alicyclic structure-containing monomers include cyclohexyl (meth)acrylate, dicyclopentyl (meth)acrylate, adamantyl (meth)acrylate, and (meth)acrylic acid. Isocampanate, dicyclopentenyl (meth)acrylate, dicyclopentenyloxyethyl (meth)acrylate, etc., among which dicyclopentyl (meth)acrylate, which exhibits better anti-scattering properties Ester (the number of carbon atoms in the alicyclic structure is 10), adamantyl (meth)acrylate (the number of carbon atoms in the alicyclic structure is 10) or isobornyl acrylate (meth)acrylate (alicyclic The number of carbon atoms in the formula structure is 7) is preferred, isobornyl (meth)acrylate is particularly preferred, and isobornyl acrylate is more preferred. The above-mentioned materials may be used singly or in combination of two or more kinds.

In the case where the (meth)acrylate polymer (A) includes an alicyclic structure-containing monomer as the monomer unit constituting the polymer, the content of the alicyclic structure-containing monomer is preferably 1% by mass or more , 4% by mass or more is particularly preferable, and 8% by mass or more is more preferable. Furthermore, in the (meth)acrylate polymer (A), as the monomer unit constituting the polymer, the content of the alicyclic structure-containing monomer is preferably 30% by mass or less, and 22% by mass or less It is particularly preferable, and more preferably 14% by mass or less. When the content of the alicyclic structure-containing monomer is within the above range, the resulting adhesive has better anti-scattering properties and at the same time has better adhesion to plastics.

Furthermore, the (meth)acrylate polymer (A) described above is also preferably a monomer containing a nitrogen atom as a monomer unit constituting the polymer. The presence of a nitrogen atom-containing monomer as a structural unit in the polymer can impart a predetermined polarity to the adhesive layer and also has excellent affinity for an adherend having a glass-like polarity. As the above-mentioned nitrogen atom-containing monomer, from the viewpoint of imparting appropriate rigidity to the (meth)acrylate polymer (A), a monomer having a nitrogen-containing heterocyclic ring is preferred. Furthermore, from the viewpoint of increasing the degree of freedom of the derivation of the nitrogen atom-containing monomer in the higher structure of the constituted adhesive, the nitrogen atom-containing monomer is not only for forming the (meth)acrylate polymer (A) In addition to the one polymerizable group used in the polymerization of ), it is preferable that the reactive unsaturated double bond group is not included.

As the monomer having a nitrogen-containing heterocyclic ring, for example, N-(meth)acryloyl mopholin, N-vinyl-2-pyrrolidone, N-(meth)acryloylpyrrolidone, N- (Meth)acrylic piperidine, N-(meth)acrylic pyrrolidine, N-(meth)acrylic aziridine, (meth)acrylic acid aziridinyl ethyl ester, 2-ethylene Pyridine, 4-vinyl pyrazine, 2-vinyl pyrazine, 1-vinyl imidazole, N-vinyl carbazole, N-vinyl phthalimide, etc., among which, N-(meth)acryloyl moforin, which can exert more excellent adhesive force, is preferable, and N-acryloyl moforin is particularly preferable. The above-mentioned materials may be used singly or in combination of two or more kinds.

In the case where the (meth)acrylate polymer (A) includes a nitrogen atom-containing monomer as the monomer unit constituting the polymer, the content of the nitrogen atom-containing monomer is preferably 1% by mass or more, and 4% by mass % Or more is particularly preferable, and 8 mass% or more is more preferable. Furthermore, in the (meth)acrylate polymer (A), as the monomer unit constituting the polymer, the content of the nitrogen atom-containing monomer is preferably 20% by mass or less, and particularly 16% by mass or less. Preferably, it is more preferably 12% by mass or less. When the content of the nitrogen atom-containing monomer is within the above range, the resulting adhesive can have more excellent anti-scattering properties, and at the same time can fully exhibit excellent adhesion to glass.

The (meth)acrylate polymer (A) may include other monomers as monomer units constituting the polymer as required. As other monomers, in order not to hinder the aforementioned effects of the reactive functional group-containing monomer, a monomer that does not contain a reactive functional group is preferred. Examples of such monomers include (meth)acrylic acid alkoxyalkyl esters such as methoxyethyl (meth)acrylate and ethoxyethyl (meth)acrylate, vinyl acetate, and styrene Wait. The above-mentioned materials may be used alone or in combination of two or more kinds.

The (meth)acrylate polymer (A) is preferably a linear polymer. Since it is a linear polymer, it becomes easy to generate molecular chain linkages, and it can be expected that the cohesive force can be increased. Therefore, it is easy to obtain an adhesive with excellent scatter resistance.

In addition, the (meth)acrylate polymer (A) is preferably a solution polymer obtained by a solution polymerization method. Since it is a solution polymer, it becomes easy to obtain a polymer of high molecular weight, and it can be expected that the cohesive force can be improved, so it is easy to obtain an adhesive with excellent scatter resistance.

The polymerization aspect of the (meth)acrylate polymer (A) may be a random copolymer or a block copolymer.

The lower limit of the weight average molecular weight of the (meth)acrylate polymer (A) is preferably 200,000 or more, more preferably 300,000 or more, and particularly preferably 400,000 or more. From the viewpoint of dispersibility, 450,000 or more is more preferable. When the lower limit of the weight average molecular weight of the (meth)acrylate polymer (A) is the above-mentioned value, the resulting adhesive becomes more excellent in scattering resistance. Furthermore, the dispersibility of the colorant (C) in the adhesive tends to be good, and therefore, the resulting adhesive has good reproducibility and uniformity with respect to the aforementioned optical properties, and can provide more excellent designs. Sex and discernibility.

Furthermore, the upper limit of the weight average molecular weight of the (meth)acrylate polymer (A) is preferably 2 million or less, particularly preferably 1.5 million or less, and more preferably 1 million or less. When the upper limit value of the weight average molecular weight of the (meth)acrylate polymer (A) is the above-mentioned value, the anti-scattering property of the adhesive obtained becomes more excellent. In addition, the weight average molecular weight in this specification is a value converted from standard polystyrene measured by gel permeation chromatography (GPC).

Moreover, in the adhesive composition P, (meth)acrylate polymer (A) may be used individually by 1 type, and may be used in combination of 2 or more types.

(1-2) Crosslinking agent (B) The crosslinking agent (B) can crosslink the (meth)acrylate polymer (A) by heating the adhesive composition P, thereby forming a good three-dimensional grid structure. In this way, the cohesive force of the obtained adhesive is improved, and the anti-scattering property becomes excellent.

The above-mentioned crosslinking agent (B) may be capable of reacting with the reactive group of the (meth)acrylate polymer (A), for example, isocyanate-based crosslinking agents and epoxy-based Crosslinking agent, amine crosslinking agent, melamine crosslinking agent, aziridine crosslinking agent, hydrazine crosslinking agent, aldehyde crosslinking agent, oxazoline crosslinking agent, metal alkoxide crosslinking Agents, metal chelate crosslinking agents, metal salt crosslinking agents, ammonium salt crosslinking agents, etc. Among them, when the reactive group possessed by the (meth)acrylate polymer (A) is a hydroxyl group, it is preferable to use an isocyanate-based crosslinking agent having excellent reactivity with the hydroxyl group. When the reactive group possessed by the ester polymer (A) is a carboxyl group, it is preferable to use an epoxy-based crosslinking agent having excellent reactivity with the carboxyl group. Moreover, the crosslinking agent (B) may be used individually by 1 type, and may be used in combination of 2 or more types.

The isocyanate-based crosslinking agent contains at least a polyisocyanate compound. Examples of the polyisocyanate compound include aromatic polyisocyanates such as toluene diisocyanate, diphenylmethane diisocyanate, and xylene diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, and isophorone diisocyanate. Alicyclic polyisocyanates such as isocyanate, hydrogenated diphenylmethane diisocyanate, etc., and its biuret body, isocyanurate body, and the above and ethylene glycol, propylene glycol, neopentyl glycol, trimethylol Adducts of reaction products of low molecular weight active hydrogen-containing compounds such as propyl propane and castor oil. Among them, from the viewpoint of reactivity with hydroxyl groups, it is preferable to use trimethylolpropane-modified aromatic polyisocyanate, and trimethylolpropane-modified toluene diisocyanate or trimethylolpropane is used. Sexual xylene diisocyanate is particularly preferred.

Examples of epoxy-based crosslinking agents include 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane, N,N,N',N'-tetraglycidyl -M-xylylenediamine (N,N,N',N'-tetraglycidyl-m-xylylenediamine), ethylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane two Glycidyl ether, diglycidyl aniline, diglycidyl amine, etc. Among them, from the viewpoint of reactivity with a carboxyl group, 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane is preferred.

Relative to 100 parts by mass of the (meth)acrylate polymer (A), the content of the crosslinking agent (B) in the adhesive composition P is preferably 0.01 parts by mass or more, particularly preferably 0.03 parts by mass or more, And more preferably 0.05 parts by mass or more. Furthermore, the content is preferably 10 parts by mass or less, preferably 5 parts by mass or less, particularly preferably 1 part by mass or less, and more preferably 0.4 parts by mass or less. Since the content of the crosslinking agent (B) is within the above range, the cohesive force of the obtained adhesive becomes moderately high, and the anti-scattering property becomes more excellent.

(1-3) Coloring agent (C) The colorant (C) may be a pigment or a dye. The pigment may be an inorganic pigment or an organic pigment. From the viewpoint of durability of the obtained adhesive, inorganic pigments are preferred. The design of the display can be considered, especially the appearance coordination, to appropriately select the color of the colorant, usually black, brown, navy blue, purple, blue and other dark or dark colors, and black is the special feature. good.

Examples of inorganic pigments include carbon black, cobalt pigments, iron pigments, chromium pigments, titanium pigments, vanadium pigments, zirconium pigments, molybdenum pigments, ruthenium pigments, and platinum pigments. Pigments, ITO (indium tin oxide, indium tin oxide) pigments, ATO (antimony tin oxide, antimony tin oxide) pigments, etc.

Furthermore, as organic pigments and organic dyes, for example, aminium dyes, cyanine dyes, merocyanine dyes, croconium dyes, Squarium pigments, azulenium pigments, polymethine pigments, naphthoquinone pigments, pyrylium pigments, phthalocyanines Pigments, naphthalocyanine pigments, naphtho lactam pigments, azo pigments, condensed azo pigments, indigo pigments, perinone pigments, perylene Pigments, dioxazine pigments, quinacridone pigments, isoindolinone pigments, quinophthalone pigments, pyrrole pigments, sulfur Indigo (thioindigo) pigments, metal complex pigments (metal complex salt pigments), dithiol metal complex pigments, indole phenol pigments, triallylmethane pigments, anthracene Anthraquinone pigments, dioxazine pigments, naphthol pigments, azomethine pigments, benzimidazolone pigments, pyranthron pigments and threne pigments Wait.

Examples of black pigments include carbon black, copper oxide, triiron tetroxide, manganese dioxide, aniline black, activated carbon, and the like. In addition, examples of black dyes include high-concentration vegetable dyes and azo dyes.

In addition, the above-mentioned pigments or dyes can be appropriately mixed and used according to the purpose.

From the viewpoint of the aforementioned lightness L* (and chromaticity a*‧chromaticity b*), among the above-mentioned coloring agents, carbon black, nigrosin-based black dyes and chromate-based black dyes are preferred . In addition, the surface of the carbon black may be subjected to a predetermined treatment (for example, a solvophilization treatment), or may not be performed.

The average haze of the colorant is the average value of the haze value at a wavelength of 780nm and the haze value at a wavelength of 380nm of a solution obtained by diluting the colorant with ethyl acetate 10,000 times. The average The lower limit of the haze is preferably 1% or more, particularly preferably 2% or more, and more preferably 3% or more. Furthermore, the upper limit of the average haze of the colorant is preferably 60% or less, preferably 40% or less, particularly preferably 30% or less, more preferably 20% or less, and 10% or less Is the best. By using this coloring agent in an appropriate amount, the resulting adhesive has good reproducibility and uniformity with respect to the aforementioned optical properties.

Regarding the above-mentioned colorant, the difference between the haze value at a wavelength of 780nm and the haze value at a wavelength of 380nm of a solution obtained by diluting the colorant with ethyl acetate 10,000 times 30 points or less is preferable, 25 points or less is more preferable, 20 points or less is particularly preferable, 16 points or less is more preferable, and 10 points or less is most preferable. By using this coloring agent in an appropriate amount, the resulting adhesive has good reproducibility and uniformity with respect to the aforementioned optical properties.

In addition, the lower limit of the difference between the above-mentioned haze values may be 0 point, but from the viewpoint that the adhesive layer 11 can be easily adjusted to have suitable optical properties, it is preferably 0.1 point or more. 0.5 point or more is preferable, 1 point or more is particularly preferable, and 3 points or more are more preferable.

The haze value of the solution obtained by diluting the above coloring agent with ethyl acetate 10,000 times at a wavelength of 780nm is preferably 0.1-50%, preferably 0.5-40%, and particularly preferably 1-30% , 1.5-20% is more preferable, and 2-10% is the best. Furthermore, the haze value of the solution obtained by diluting the coloring agent 10,000 times with ethyl acetate at a wavelength of 380nm is preferably 1-60%, preferably 3-50%, and 6-40% It is particularly preferred, more preferably 8-30%, and most preferably 10-20%. In this way, it becomes easy to satisfy the above-mentioned difference between the haze values.

Furthermore, a solution obtained by diluting the above-mentioned coloring agent 10,000 times with ethyl acetate has a wavelength range of 380 nm to 780 nm at intervals of 5 nm (that is, 380 nm, 385 nm, 390 nm, ..., 775 nm). , 780nm) The standard deviation of the haze value is preferably 10 or less, preferably 8 or less, particularly preferably 5 or less, and more preferably 2 or less. The lower limit of the above standard deviation is preferably 0, but generally 0.1 or more is preferable, 0.5 or more is particularly preferable, and 1 or more is more preferable. In this way, the obtained adhesive has good reproducibility and uniformity with respect to the aforementioned optical properties.

Relative to 100 parts by mass of the (meth)acrylate polymer (A), the content of the coloring agent (C) in the colored adhesive layer 12 is preferably 0.01 parts by mass or more, preferably 0.05 parts by mass or more, and 0.1 part by mass or more is particularly preferable, and more preferably 0.3 part by mass or more. Furthermore, the above content is preferably 2 parts by mass or less, preferably 1.5 parts by mass or less, particularly preferably 1.2 parts by mass or less, more preferably 0.9 parts by mass or less, and most preferably 0.6 parts by mass or less. Since the content of the colorant (C) is within the above range, it becomes easy to satisfy the aforementioned optical characteristics, and the display becomes easy to have better appearance coordination and visibility.

(1-4) Active energy ray hardening component (D) In the adhesive formed by crosslinking the adhesive composition P and cured by active energy rays, the active energy ray curable components (D) are mutually polymerized, and the active energy ray curability after polymerization can be estimated The component (D) is linked to the crosslinked structure (three-dimensional network structure) of the (meth)acrylate polymer (A). This kind of adhesive with advanced structure has excellent durability while exerting excellent anti-scattering properties.

The active energy ray-curable component (D) is not particularly limited as long as it is a component that can be cured by active energy ray irradiation to obtain the above-mentioned effects, and may be any of monomers, oligomers, or polymers, or It can also be a mixture of the above. Among them, it is preferable to cite a polyfunctional acrylate monomer having more excellent durability.

Examples of polyfunctional acrylate monomers include 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, and neopentyl glycol di(meth)acrylate. (Meth)acrylate, polyethylene glycol di(meth)acrylate, neopentyl glycol adipic acid (meth)acrylate diester, hydroxytrimethyl acetate neopentyl glycol di(meth)acrylate , Dicyclopentyl di(meth)acrylate, tricyclodecane dimethanol (meth)acrylate, caprolactone modified dicyclopentenyl di(meth)acrylate, modified ethylene oxide Sexual di(meth)acrylate phosphate, di(acryloxyethyl) isocyanurate, allylated cyclohexyl di(meth)acrylate, ethoxylated bisphenol A diacrylate , 9,9-bis[4-(2-propenyloxyethoxy)phenyl] fluorene and other bifunctional groups; trimethylolpropane tri(meth)acrylate, dineopentaerythritol tri (Meth)acrylate, propionic acid-modified dineopentaerythritol tri(meth)acrylate, neopentaerythritol tri(meth)acrylate, propylene oxide-modified trimethylolpropane tri( Meth)acrylate, tris(acryloxyethyl)isocyanurate, ε-caprolactone modified tris(2-(meth)acryloxyethyl)isocyanurate, etc. 3-functional group type; diglycerol tetra(meth)acrylate, neopentylerythritol tetra(meth)acrylate, etc. 4-functional group type; propionic acid-modified dineopentaerythritol penta(meth)acrylic acid 5-functional type such as ester; 6-functional type such as dineopentaerythritol hexa(meth)acrylate, caprolactone-modified dineopentaerythritol hexa(meth)acrylate, etc. The above-mentioned materials may be used singly or in combination of two or more kinds. In addition, from the viewpoint of the miscibility with the (meth)acrylate polymer (A) and the dispersibility of the coloring agent (C), the molecular weight of the polyfunctional acrylate monomer is preferably less than 1,000.

Among the above, from the viewpoint of durability of the obtained adhesive, di(acryloxyethyl) isocyanurate, tris(acryloxyethyl) isocyanurate, ε-caprolactone-modified tris (2-(meth)acryloyloxyethyl) isocyanurate and other multifunctional acrylate monomers containing isocyanurate structure in the molecule Polyfunctional acrylate monomers containing cyclic structure (especially cycloalkane structure) in the molecule, such as tricyclodecane dimethanol (meth)acrylate, etc. A multifunctional acrylate monomer containing an isocyanurate structure, or a multifunctional acrylate monomer containing more than bifunctional groups and a polycyclic structure (especially the polycyclic structure of cycloalkanes) in the molecule Preferably, ε-caprolactone modified tris-(2-(meth)acryloyloxyethyl) isocyanurate or tricyclodecane dimethanol (meth)acrylate is particularly preferred , Ε-caprolactone modified tris-(2-propenyloxyethyl) isocyanurate or tricyclodecane dimethanol acrylate is more preferred, and ε-caprolactone modified Tris-(2-propenoxyethyl) isocyanurate is the best.

From the viewpoint of making the durability of the adhesive cured by the active energy ray more excellent, the active energy ray hardened in the adhesive composition P with respect to 100 parts by mass of the (meth)acrylate polymer (A) The lower limit of the content of the sexual component (D) is preferably 1 part by mass or more, particularly preferably 3 parts by mass or more, and more preferably 4 parts by mass or more. On the other hand, from the viewpoint of the adhesive force of the adhesive cured by active energy rays, the upper limit of the content is preferably 20 parts by mass or less, preferably 15 parts by mass or less, and 10 parts by mass or less. Particularly preferred, and more preferably 6 parts by mass or less.

(1-5) Photopolymerization initiator (E) In the case of using ultraviolet rays as the active energy rays for curing the adhesive composition P, the adhesive composition P preferably further includes a photopolymerization initiator (E). By including the photopolymerization initiator (E), the active energy ray-curable component (D) can be efficiently polymerized, and the polymerization curing time and the amount of active energy ray irradiation can be reduced.

Examples of the photopolymerization initiator (E) include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, and benzoin isobutyl ether. , Acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2- Hydroxy-2-methyl-1-phenylpropane-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholine Propane-1-one, 4-(2-hydroxyethoxy)phenyl-2-(hydroxy-2-propyl) ketone, benzophenone, p-phenylbenzophenone, 4,4'- Diethylamino diphenyl ketone, dichloro diphenyl ketone, 2-methyl anthraquinone, 2-ethyl anthraquinone, 2-tertiary butyl anthraquinone, 2-amino anthraquinone, 2-methyl 2-methyl-thioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyl Dimethyl ketal, acetophenone dimethyl ketal, p-dimethylamino benzoate, oligo[2-hydroxy-2-methyl-1[4-(1-methylvinyl)] Phenyl]acetone], 2,4,6-trimethylbenzyl-diphenylphosphine oxide, bis(2,4,6-trimethylbenzyl)-phenylphosphine oxide, etc. The above-mentioned materials may be used alone or in combination of two or more kinds.

Among the above, phosphine oxide-based light which is easy to cleavage and is easy to harden the adhesive even when ultraviolet light is irradiated through a member containing ultraviolet absorber or when ultraviolet absorber is contained in the adhesive. The polymerization initiator is preferred. Specifically, 2,4,6-trimethylbenzyl-diphenylphosphine oxide, bis(2,4,6-trimethylbenzyl)-phenylphosphine oxide, etc. are good.

The lower limit of the content of the photopolymerization initiator (E) in the adhesive composition P with respect to 100 parts by mass of the active energy ray-curable component (D) is preferably 0.1 part by mass or more, and 1 part by mass or more It is particularly preferable, and more preferably 5 parts by mass or more. Furthermore, the upper limit is preferably 30 parts by mass or less, particularly preferably 20 parts by mass or less, and more preferably 12 parts by mass or less.

(1-6) Various additives In the adhesive composition P, various additives commonly used in acrylic adhesives, such as silane coupling agents, ultraviolet absorbers, rust inhibitors, antistatic agents, tackifiers, antioxidants, and light stabilizers, can be added as required. Agents, softeners, refractive index modifiers, etc. In addition, the additives constituting the adhesive composition P do not include the polymerization solvent and the diluting solvent described later.

The adhesive composition P preferably contains the above-mentioned silane coupling agent. In this way, regardless of whether the adherend is a plastic plate or a glass component, the adhesion to the adherend can be improved, and the anti-scattering property becomes more excellent.

As the silane coupling agent, an organosilicon compound having at least one alkoxysilyl group in the molecule, has good miscibility with the (meth)acrylate polymer (A), and has light transmittance.

Examples of such silane coupling agents include polymerizable unsaturated group-containing silicon compounds such as vinyl trimethoxysilane, vinyl triethoxysilane, and methacryloxypropyltrimethoxysilane. , 3-glycidoxypropyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane and other silicon compounds with epoxy structure, 3-mercaptopropyltrimethoxysilane Silane, 3-mercaptopropyltriethoxysilane, 3-mercaptopropyldimethoxymethylsilane and other mercapto group-containing silicon compounds, 3-aminopropyltrimethoxysilane, N-(2- Aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane and other amino-containing silicon compounds, 3-chloropropyltrimethoxysilane, 3-isocyanatepropyltriethoxysilane, or at least one of the above and methyltriethoxysilane, ethyltriethoxysilane, methyltrimethoxysilane , Condensates of alkyl-containing silicon compounds such as ethyl trimethoxysilane. The above-mentioned materials may be used singly or in combination of two or more kinds.

Relative to 100 parts by mass of the (meth)acrylate polymer (A), the content of the silane coupling agent in the adhesive composition P is preferably 0.01 parts by mass or more, particularly preferably 0.05 parts by mass or more, and 0.1 More parts by mass is better. Furthermore, the content is preferably 1 part by mass or less, particularly preferably 0.5 parts by mass or less, and more preferably 0.3 parts by mass or less. Since the silane coupling agent is contained in the above content, the adhesion of the anti-scattering adhesive sheet using the obtained adhesive to the adherend can be improved, and the anti-scattering property can be exhibited more excellent.

Furthermore, it is preferable that the adhesive composition P also contains an ultraviolet absorber. Examples of ultraviolet absorbers include benzophenones, benzotriazoles, benzoates, benzoxazinones, triazines, phenyl salicylate, and cyano groups. Compounds such as acrylates and nickel composite salts. Among them, from the viewpoint of miscibility with the (meth)acrylate polymer (A) and dispersibility with the coloring agent (C), benzophenones, benzotriazoles, or triazines The compounds are preferred, and benzophenone compounds are particularly preferred. The above-mentioned materials may be used singly or in combination of two or more kinds.

When the adhesive composition P contains an ultraviolet absorber, relative to 100 parts by mass of the (meth)acrylate polymer (A), the content of the ultraviolet absorber is preferably 0.01 parts by mass or more, and 0.05 parts by mass The above is particularly preferable, and 0.1 part by mass or more is more preferable. Furthermore, the content is preferably 1 part by mass or less, particularly preferably 0.5 parts by mass or less, and more preferably 0.2 parts by mass or less. Since the ultraviolet absorber is contained in the above content, even if there are components that are easily degraded by ultraviolet rays inside the display, the anti-scattering adhesive sheet can exert an ultraviolet shielding effect and prevent the components from deteriorating due to ultraviolet rays.

(2) Preparation of adhesive composition The (meth)acrylate polymer (A) can be produced by mixing the obtained (meth)acrylate polymer (A), crosslinking agent (B), and colorant (C) at the same time , Add active energy ray curable component (D), photopolymerization initiator (E), additives, etc. according to requirements to produce adhesive composition P.

A general free radical polymerization method can be used to polymerize a mixture of monomers constituting the polymer to produce a (meth)acrylate polymer (A). The polymerization of the (meth)acrylate polymer (A) can use a polymerization initiator as required, and is preferably carried out by a solution polymerization method. However, the present invention is not limited to this, and polymerization may be carried out without a solvent. As a polymerization solvent, ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, etc. are mentioned, for example, It can also use combining 2 or more types.

Examples of the polymerization initiator include azo compounds, organic peroxides, and the like, and two or more of them may be used in combination. As the azo compound, for example, 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis(cyclo Hexane 1-carbonitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2,4-dimethyl-4-methoxy Valeronitrile), dimethyl 2,2'-azobis(2-methylpropionate), 4,4'-azobis(4-cyanovaleric acid), 2,2'-azobis( 2-hydroxymethylpropionitrile), 2,2'-azobis[2-(2-imidazolin-2-yl)propane] and the like.

Examples of organic peroxides include benzyl peroxide, t-butyl peroxybenzoate, cumene hydroperoxide, diisopropyl peroxydicarbonate, and di-n-propyl peroxydicarbonate. , Di(2-ethoxyethyl) peroxydicarbonate, t-butyl peroxyneodecanoate, t-butyl peroxytrimethylacetate, (3,5,5-trimethylhexyl) Peroxide, dipropylene peroxide, diacetyl peroxide, etc.

In addition, in the above-mentioned polymerization step, the weight average molecular weight of the polymer obtained can be adjusted by compounding a chain transfer agent such as 2-mercaptoethanol.

After obtaining the (meth)acrylate polymer (A), add the crosslinking agent (B), the coloring agent (C), and the diluting solvent as required to the solution of the (meth)acrylate polymer (A). Active energy ray-curable component (D), photopolymerization initiator (E), additives, etc. are thoroughly mixed to obtain an adhesive composition P (coating solution) diluted with a solvent. In addition, if any of the above-mentioned components is used in a solid form, or when precipitation occurs when mixed with other components in an undiluted state, the component may be dissolved or diluted separately first. After being in the diluting solvent, it is mixed with other ingredients.

Examples of the aforementioned dilution solvent include aliphatic hydrocarbons such as hexane, heptane, and cyclohexane, aromatic hydrocarbons such as toluene and xylene, halogenated hydrocarbons such as dichloromethane and dichloroethane, methanol, ethanol, Alcohols such as propanol, butanol, 1-methoxy-2-propanol, acetone, methyl ethyl ketone, 2-pentanone, isophorone (Isophorone), ketones such as cyclohexanone, ethyl acetate, butyl acetate Esters such as esters, cellosolves such as cellosolves, etc.

The concentration/viscosity of the coating solution prepared in the above manner is not particularly limited as long as it is within a coating (coating) range, and can be appropriately selected according to the situation. For example, the concentration of the adhesive composition P can be diluted to 10-60% by mass. In addition, when obtaining the coating solution, the addition of a dilution solvent or the like is not essential, as long as the adhesive composition P has a viscosity that can be applied, and the dilution solvent may not be added. In this case, the adhesive composition P is a coating solution in which the polymerization solvent of the (meth)acrylate polymer (A) is directly used as the diluting solvent.

(3) Formation of adhesive layer The colored adhesive layer 12 in this embodiment is preferably composed of an adhesive obtained by crosslinking (the coating layer of) the adhesive composition P. The crosslinking of the adhesive composition P can be performed by heat treatment. In addition, this heat treatment can also be used together as a drying treatment at the time of volatilizing a dilution solvent etc. from the coating layer of the adhesive composition P applied to a desired object.

The heating temperature of the heat treatment is preferably 50 to 150°C, and particularly preferably 70 to 120°C. Furthermore, the heating time is preferably 10 seconds to 10 minutes, and particularly preferably 50 seconds to 2 minutes.

After the heat treatment, a curing period of about 1 to 2 weeks at normal temperature (for example, 23° C., 50% RH) can also be set as required. In the case where this curing period is required, the adhesive is formed after the curing period has elapsed, and in the case where the curing period is not required, the adhesive is formed after the heat treatment is completed.

Through the above-mentioned heat treatment (and curing), the (meth)acrylate polymer (A) can be cross-linked well with the cross-linking agent (B).

(4) The thickness of the colored adhesive layer The lower limit of the thickness of the colored adhesive layer 12 is preferably 5 μm or more, preferably 10 μm or more, and particularly preferably 20 μm or more. When the lower limit of the thickness of the colored adhesive layer 12 is as described above, due to the relationship with the content of the coloring agent (C), the aforementioned optical properties are easily satisfied, and the desired adhesive force is easily expressed.

Furthermore, the upper limit of the thickness of the colored adhesive layer 12 is preferably 80 μm or less, and more preferably 60 μm or less. From the viewpoint of the pencil hardness of the surface of the anti-scattering adhesive sheet 1 on the substrate 11 side, It is particularly preferably 40 μm or less, and more preferably 30 μm or less. When the upper limit of the thickness of the colored adhesive layer 12 is as described above, workability becomes good. Furthermore, appearance defects due to indentation and the like become less likely to occur. Furthermore, due to the relationship with the content of the coloring agent (C), it becomes easy to satisfy the aforementioned optical properties. In addition, the colored adhesive layer 12 may be formed as a single layer, or may be formed by stacking a plurality of layers.

(B) Polyurethane adhesive The urethane-based adhesive in this embodiment contains a cross-linked urethane resin, and is preferably manufactured using a polyurethane polyol and a polyisocyanate cross-linking agent.

The polyurethane polyol can be obtained by reacting the polyol with the polyisocyanate so that the equivalent ratio of the isocyanate group to the hydroxyl group is less than one. As the polyol, polyester polyol, polyether polyol, etc. are preferred. As the polyether polyol, for example, polypropylene glycol, polyethylene glycol, polytetramethylene glycol and the like are preferable.

The average number of functional groups per molecule of the polyether polyol is preferably 2.2 or more and 3.4 or less, more preferably 2.3 or more and 3.3 or less, and more preferably 2.4 or more and 3.2 or less. Furthermore, the number average molecular weight (Mn) of the polyether polyol is preferably 300 or more and 7000 or less, and more preferably 350 or more and 6000 or less.

Examples of the polyisocyanate constituting the polyurethane polyol include aromatic polyisocyanates, aliphatic polyisocyanates, aromatic aliphatic polyisocyanates, and alicyclic polyisocyanates. Furthermore, the above-mentioned trimethylolpropane adduct, biuret body, urate body, etc. are mentioned. As the aromatic polyisocyanate, for example, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4′-diphenylmethane diisocyanate, and the like can be cited.

Generally, a catalyst is used to carry out the polymerization reaction between the above-mentioned polyol and polyisocyanate. Examples of the catalyst include tin-based organometallic compounds such as dioctyltin dilaurate.

On the other hand, as the polyisocyanate crosslinking agent, for example, trimethylolpropane adduct, biuret body, urate body, etc. of the above-mentioned polyisocyanate can be cited. The compounding amount of the polyisocyanate crosslinking agent relative to the polyurethane polyol is preferably such that the equivalent ratio of the isocyanate group to the hydroxyl group is 0.5 or more and 1.5 or less.

The compounding amount of the coloring agent (C) in the urethane adhesive and the thickness of the colored adhesive layer 12 are the same as in the case of the aforementioned acrylic adhesive.

(C) Silicone adhesive The silicone adhesive in this embodiment can be a condensation type silicone adhesive or an addition reaction type silicone adhesive, and the addition reaction type silicone adhesive is good. The addition reaction type silicone adhesive contains a first polydimethylsiloxane having at least two alkenyl groups in one molecule and a second polydimethylsiloxane having at least two hydrosilyl groups in one molecule. The addition reaction type polysiloxane resin, silicone resin, and catalyst obtained from methylsiloxane are preferred.

As the polysiloxane resin, for example, a monofunctional siloxane unit [(CH ₃ ) ₃ SiO _1/2 ] which is an M unit and a tetrafunctional siloxane unit which is a Q unit [SiO _4/2 ] MQ resin composed of. The molar ratio of M unit/Q unit is preferably 0.6 to 1.7.

Relative to 100 parts by mass of addition reaction type polysiloxane resin, the blending amount of polysiloxane resin is preferably 10~200 parts by mass, particularly preferably 15~100 parts by mass, and more preferably 20~80 parts by mass. good. Since the blending amount of the silicone resin is 10 parts by mass or more, the desired adhesive force can be obtained. Furthermore, when the blending amount of the polysiloxane resin is 200 parts by mass or less, good reworkability can be obtained, and even in the case where a bonding error occurs, the display member, especially the high-priced display member, becomes reproducible. use.

The above-mentioned catalyst is not particularly limited as long as it can harden the addition reaction type polysiloxane resin (addition reaction of the first polydimethylsiloxane and the second polydimethylsiloxane). Among them, platinum group metal compounds are preferred. Relative to 100 parts by mass of the above-mentioned addition reaction type polysiloxane resin, the blending amount of the catalyst is preferably 0.01 to 3 parts by mass, and particularly preferably 0.05 to 2 parts by mass.

The compounding amount of the coloring agent (C) in the silicone adhesive and the thickness of the colored adhesive layer 12 are the same as in the aforementioned acrylic adhesive.

1-3. Peeling sheet The peeling sheet 13 protects the colored adhesive layer 12 before using the anti-scattering adhesive sheet 1, and is peeled off when using the anti-scattering adhesive sheet 1 (colored adhesive layer 12). In the anti-scattering adhesive sheet 1 according to this embodiment, the release sheet 13 is not absolutely necessary.

As the release sheet 13, for example, a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, a polyvinyl chloride film, a vinyl chloride copolymer film, and a polyterephthalene film can be used. Ethylene formate film, polyethylene naphthalate film, polybutylene terephthalate film, polyurethane film, ethylene vinyl acetate film, ionomer resin film, ethylene·(meth)acrylic acid copolymer Film, ethylene·(meth)acrylate copolymer film, polystyrene film, polycarbonate film, polyimide film, fluororesin film, etc. Furthermore, crosslinked films of the above-mentioned materials can also be used. In addition, a laminated film of the above-mentioned materials can also be used.

The peeling surface of the peeling sheet 13 (especially the surface in contact with the colored adhesive layer 12) is preferably subjected to a peeling treatment. Examples of the release agent used in the release treatment include alkyd, silicone, fluorine, unsaturated polyester, polyolefin, and wax release agents.

The thickness of the release sheet 13 is not particularly limited, but is usually about 20 to 150 μm.

2. Physical properties (1) Gel fraction The lower limit of the gel fraction of the adhesive constituting the colored adhesive layer 12 is preferably 30% or more, preferably 40% or more, and particularly preferably 50% or more. When the lower limit of the gel fraction of the adhesive is as described above, the cohesive force of the adhesive becomes high, and it is possible to exhibit more excellent anti-scattering properties. Furthermore, the upper limit of the gel fraction of the adhesive according to this embodiment is preferably 95% or less, preferably 90% or less, particularly preferably 85% or less, and more preferably 80% or less . When the upper limit of the gel fraction of the adhesive is as described above, since the adhesive does not become too hard and exhibits good adhesion, it can exhibit more excellent anti-scattering properties. Here, the method for measuring the gel fraction of the adhesive is as described in the test example described later.

(2) L*a*b* of the colored adhesive layer The lightness L* of the colored adhesive layer 12 defined by the CIE1976 L*a*b* color system is preferably 92 or less, preferably 86 or less, particularly preferably 83 or less, and more preferably 80 or less. In this way, it is easy to set the lightness L* of the anti-scattering adhesive sheet 1 to the aforementioned preferred value, and when the display is closed, the display can be given a sense of integrity with the black frame material and the printed layer, thereby improving the appearance Coordination.

On the other hand, from the viewpoint of improving the design and visibility of the display through appearance coordination, the lower limit of the brightness L* is preferably 10 or more, preferably 20 or more, and 40 or more. Particularly preferred, more preferably 50 or more, and more preferably 60 or more.

Furthermore, the chromaticity a* of the colored adhesive layer 12 defined by the CIE1976 L*a*b* color system is preferably -20-20 or less, preferably -10-10, and -5-5 Particularly preferred, -2 to 2 is more preferred, and -1.4 to 1.4 is the most preferred. Since the chromaticity a* is within the above range, it is easy to set the chromaticity a* of the anti-scattering adhesive sheet 1 to the aforementioned preferred value, and the visibility of the display becomes good, and the design is particularly The appearance coordination of car displays will be further improved.

Furthermore, the chromaticity b* defined by the CIE1976 L*a*b* color system of the colored adhesive layer 12 is preferably -20-20, preferably -10-10, and -5-5 Particularly preferred, -2 to 2 is more preferred, and -1 to 1 is the most preferred. Since the chromaticity b* is within the above range, it is easy to set the chromaticity b* of the anti-scattering adhesive sheet 1 to the above-mentioned preferred value, and the visibility of the display becomes good, and the design is particularly The appearance coordination of car displays will be further improved.

(3) The total light transmittance of the colored adhesive layer The total light transmittance of the colored adhesive layer 12 is preferably 10% or more, more preferably 20% or more, particularly preferably 30% or more, and more preferably 40% or more. In this way, the visibility of the image/movie in the obtained display becomes better. The upper limit of the above-mentioned total light transmittance is not particularly limited. It is usually 100% or less. When considering the relationship with the lightness L* and the black tone improvement in the image/movie of the display, 95% or less is Preferably, it is preferably 85% or less, particularly preferably 75% or less, more preferably 65% or less, and most preferably 55% or less.

(4) Haze value The haze value of the anti-scattering adhesive sheet 1 according to this embodiment is usually 0% or more, preferably 0.1% or more, preferably 1% or more, particularly preferably 3% or more, and most preferably 6% or more good. Since the lower limit of the haze value of the colored adhesive layer 12 is as described above, it becomes easy to satisfy the aforementioned lightness L*. On the other hand, the haze value of the colored adhesive layer 12 is preferably 60% or less, preferably 40 or less, particularly preferably 25% or less, more preferably 15% or less, and most preferably 10% or less. good. Since the upper limit of the haze value of the colored adhesive layer 12 is as described above, it becomes easy to satisfy the sum of the image clarity of the anti-scattering adhesive sheet 1 and the lightness L*. In addition, the haze value in this specification is a value measured based on JIS K7136:2000.

The haze value of the colored adhesive layer 12 is usually 0% or more, preferably 0.1% or more, preferably 0.5% or more, and particularly preferably 1% or more. Since the lower limit of the haze value of the colored adhesive layer 12 is as described above, it becomes easy to satisfy the aforementioned lightness L*. On the other hand, the haze value of the colored adhesive layer 12 is preferably 60% or less, preferably 40 or less, particularly preferably 20% or less, and more preferably 8% or less. Since the upper limit of the haze value of the colored adhesive layer 12 is as described above, it becomes easy to satisfy the sum of the image clarity of the anti-scattering adhesive sheet 1 and the lightness L*.

(5) Adhesion The lower limit of the adhesion of the anti-scattering adhesive sheet 1 to soda lime glass according to this embodiment is preferably 0.05N/25mm or more, preferably 0.1N/25mm or more, and particularly preferably 1N/25mm or more, and More preferably 5N/25mm or more. When the lower limit of the adhesive force is as described above, the anti-scattering property becomes more excellent. Furthermore, the upper limit of the adhesion of the anti-scattering adhesive sheet 1 to the soda lime glass according to this embodiment is preferably 50N/25mm or less, preferably 35N/25mm or less, and particularly preferably 25N/25mm or more . When the upper limit of the adhesive force is as described above, good reworkability can be obtained, and even if a bonding error occurs, the display member, especially the high-priced display member, becomes reusable.

Here, the adhesive force in this manual is basically the adhesive force measured by the 180-degree peel method according to JIS Z0237:2009, where the width of the measurement sample is 25mm and the length is 100mm, and the measurement sample is attached To the adherend, press 0.5 MPa, 50°C for 20 minutes, then place it under normal pressure, 23°C, 50% RH for 24 hours, and then measure at a peeling speed of 300 mm/min to obtain The above adhesion. In addition, in the case of an active energy ray-curable adhesive, it is the adhesive force for the adhesive layer cured by active energy ray irradiation after the adherend is attached.

(6) Pencil hardness In the anti-scatter adhesive sheet 1 according to the present embodiment, the pencil hardness of the surface on the side of the substrate 11 is preferably F or more, and particularly preferably H or more. Since the anti-scattering adhesive sheet 1 has the aforementioned pencil hardness, the surface of the anti-scattering adhesive sheet 1 on the side of the base material 11 has sufficient hardness. Therefore, when the anti-scattering adhesive sheet 1 is used on the front surface of the protective panel, excellent surface protection can be exerted. Furthermore, when the anti-scattering adhesive sheet 1 is used on the back surface of the protective panel, excellent impact resistance can be exhibited. In addition, the measuring method of pencil hardness in the present invention is as described in the test example described later.

3. Manufacturing of anti-scattering adhesive sheet As an example of the production of the anti-scattering adhesive sheet 1, the coating solution of the adhesive composition P is applied to the peeling surface of the release sheet 13, and heat treatment is performed to thermally crosslink the adhesive composition P to form a coating After the cloth layer, the coating layer is attached to the base material 11. At this time, when the substrate 11 has a functional layer on one side, usually the surface on the side where the functional layer does not exist is brought into contact with the coating layer.

In the case where a curing period is required, the colored adhesive layer 12 is formed by placing the coating layer for a period of curing, while in the case where a curing period is not required, the coating layer directly serves as the colored adhesive layer 12. In the above manner, the aforementioned anti-scattering adhesive sheet 1 can be obtained. The conditions for heat treatment and curing are as described above.

As a coating method of the coating solution of the adhesive composition P, for example, a bar coating method, a knife coating method, a roll coating method, or a blade coating method can be used. Coating method, die coating method, gravure coating method, etc.

[monitor] A display according to an embodiment of the present invention includes a protective panel, and the anti-scatter adhesive sheet is provided on one surface side or both surface sides of the protective panel. The anti-scatter adhesive sheet can be directly attached to the protective panel, or can also be attached to the protective panel through other layers.

According to the display of this embodiment, as an example of a peripheral part, a frame material or the like may be provided on the peripheral part, or a frame-shaped printed layer or characters may be displayed on a part of a display member constituting the display. The printing layer and so on. Furthermore, both of the above may be provided.

According to the display of this embodiment, since the anti-scattering adhesive sheet with the colored adhesive layer is provided on the protective panel, it is in contact with the peripheral components such as the frame material of the display, the frame-shaped printed layer, and the printing of display characters when it is closed. There is good appearance coordination between layers, etc., and the design becomes higher. Furthermore, even if the mobile monitor is dropped due to a significant impact, or a car monitor receives a significant impact due to an accident, etc., the protective panel is broken, the anti-scatter adhesive sheet is attached to the protective panel, so it can The protective panel that prevents cracking is scattered.

2 and 3 illustrate the specific structure of an example of the display according to this embodiment. As shown in FIG. 2, the display device 10A according to the first embodiment includes a display module 7, a thin film sensor 5 laminated thereon via an adhesive layer 6, and a thin film sensor 5 laminated thereon via an adhesive layer 4 in order from below. The protective panel 2 on which the patterned transparent conductive film 3 is attached, and the anti-scattering adhesive sheet 1 attached to the protective panel 2 via the colored adhesive layer 12 (the peeling sheet 13 has been peeled off). That is, in this display device 10A, the anti-scatter adhesive sheet 1 is provided on the front side of the protection panel 2 (the side opposite to the display module 7).

As shown in FIG. 3, a display device 10B according to the second embodiment includes a display module 7, a thin film sensor 5 laminated thereon via an adhesive layer 6, and a thin film sensor 5 laminated thereon via an adhesive layer 4 in order from below. The anti-scattering adhesive sheet 1 on the upper side (the peeling sheet 13 has been peeled off), and the protective panel 2 with the patterned transparent conductive film 3 laminated via the colored adhesive layer 12 of the anti-scattering adhesive sheet 1. That is, in this display device 10B, the anti-scattering adhesive sheet 1 is provided on the back side of the protection panel 2 (the side of the display module 7).

In addition, in the above-mentioned display devices 10A and 10B, the transparent conductive film 3 is provided on the protective panel 2. However, the present invention is not limited to this, and the transparent conductive film 3 may be provided on other parts.

Examples of the display module 7 include a liquid crystal (LCD) module, a light emitting diode (LED) module, an organic electroluminescence (organic EL) module, electronic paper, and the like.

The adhesive layer 6 and the adhesive layer 4 may be formed of the desired adhesive or adhesive sheet, or may be formed of the same adhesive as the colored adhesive layer 12 of the anti-scattering adhesive sheet 1 (but preferably does not contain a colorant) ) Formed. Examples of the aforementioned desired adhesives include acrylic adhesives, rubber adhesives, silicone adhesives, urethane adhesives, polyester adhesives, polyvinyl ether adhesives, etc. Acrylic adhesive is preferred.

The thin film sensor 5 is generally composed of a base film 51 and a patterned transparent conductive film 52. The thin film sensor 5 is not particularly limited, for example, polyethylene terephthalate film, polyethylene naphthalate film, polycarbonate film, polymethyl methacrylate film, triacetyl fiber Plain film, polypropylene film.

Examples of the transparent conductive film 52 include metals such as platinum, gold, silver, and copper, oxides such as tin oxide, indium oxide, cadmium oxide, zinc oxide, and zinc dioxide, and tin-doped indium oxide (ITO ), zinc oxide doped indium oxide, fluorine doped indium oxide, antimony doped tin oxide, fluorine doped tin oxide, aluminum doped zinc oxide and other composite oxides, chalcogenide, lanthanum hexaboride, It is composed of non-oxidizing compounds such as titanium nitride and titanium carbide. Among them, it is preferably composed of tin-doped indium oxide (ITO).

In addition, the transparent conductive film 52 of the thin film sensor 5 in the above display devices 10A and 10B is located on the upper side of the thin film sensor 5 in FIGS. 2 and 3, but it is not limited to this, and may be located on the thin film sensor. 5's underside.

The protective panel 2 is a member used to protect the display module 7 of the displays 10A, 10B and other internal components from external factors, and is preferably composed of other components such as glass plates, plastic plates, and laminates including the former. .

The glass plate is not particularly limited. For example, chemically strengthened glass, alkali-free glass, quartz glass, soda lime glass, barium/strontium-containing glass, aluminosilicate glass, lead glass, and borosilicate glass can be cited. , Barium borosilicate glass, etc. The thickness of the glass plate is not particularly limited, and is usually 0.1 to 5 mm, and preferably 0.2 to 2 mm.

It does not specifically limit as said plastic board, For example, an acrylic board, a polycarbonate board, etc. are mentioned. The thickness of the plastic plate is not particularly limited, and is usually 0.2-5 mm, and preferably 0.4-3 mm.

In addition, a desired functional layer (hard coat layer, anti-glare layer, etc.) may be provided on one side or both sides of the above-mentioned glass plate or plastic plate.

In the above-mentioned display devices 10A and 10B, the transparent conductive film 3 is patterned and provided on the protective panel 2. As the material of the transparent conductive film 3, the same material as the transparent conductive film 52 of the above-mentioned thin film sensor 5 can be used. In addition, the transparent conductive film 3 and the transparent conductive film 52 of the thin film sensor 5 usually form a circuit pattern in the X-axis direction in one direction, and form a circuit pattern in the Y-axis direction in the other direction.

In addition, the display devices 10A and 10B according to this embodiment preferably do not have an anti-reflection layer. When an anti-reflection layer is provided, the hardness of the surface may be reduced, and the desired appearance coordination may not be obtained.

In the case of manufacturing the display device 10A, the release sheet 13 of the anti-scattering adhesive sheet 1 can be peeled off, and the exposed colored adhesive layer 12 can be attached to the front side of the protective panel 2 (the side where the transparent conductive film 3 is not present) After that, using the protective panel 2 with the anti-scattering adhesive sheet 1 attached, the display device 10A can be manufactured by a conventional method, or a display device can be manufactured by a conventional method (in the state where the anti-scattering adhesive sheet 1 is not attached) After the lower display device 10A), the anti-scatter adhesive sheet 1 is attached to the surface side of the protection panel 2 (the side opposite to the display module 7).

Furthermore, in the case of manufacturing the display device 10B, the release sheet 13 of the anti-scattering adhesive sheet 1 can be peeled off, and the exposed colored adhesive layer 12 can be attached to the transparent conductive film 3 provided on the back side of the protective panel 2 After mounting, the protective panel 2 with the anti-scattering adhesive sheet 1 can be used to manufacture the display device 10B by a conventional method.

When the colored adhesive layer 12 is curable with active energy rays, after the anti-scattering adhesive sheet 1 is attached by the colored adhesive layer 12 as described above, the colored adhesive layer 12 is irradiated with active energy rays. In this way, the active energy ray-curable component (C) in the colored adhesive layer 12 is polymerized, and the colored adhesive layer 12 is hardened. In the step of irradiating the colored adhesive layer 12 with an active energy ray, the active energy ray irradiates a passing member, for example, the substrate 11 of the anti-scatter adhesive sheet 1 may be irradiated.

The active energy rays mean electromagnetic waves or charged particle beams having energy quantum, and specific examples include ultraviolet rays, electron beams, and the like. Among active energy rays, ultraviolet rays, which are easy to handle, are particularly preferred.

High-pressure mercury lamps, fusion H lamps, xenon lamps, etc. can be used to irradiate ultraviolet rays, and the illuminance of ultraviolet rays is ^{preferably about 50~1000mW/cm 2} and also about 100~500mW/cm ² Better. Further, the light amount to 50 ~ 10000mJ / cm ² preferably, to 200 ~ 7000mJ / cm ² are preferred, and at 500 ~ 3000mJ / cm ² is particularly preferred. On the other hand, an electron beam accelerator or the like can be used to irradiate the electron beam, and the irradiation amount of the electron beam is preferably about 10 to 1000 krad.

Here, as shown in FIG. 4, according to the displays 10A and 10B of the present embodiment, it is preferable that the displays 10A and 10B have a frame material 8 around the periphery of the displays. The frame material 8 is preferably dark or dark colors such as black, brown, navy blue, purple, blue, etc., and black is particularly preferred. Furthermore, the frame material 8 is defined by the CIE1976 L*a*b* color system, with lightness L* ranging from 5 to 95, chroma a* ranging from -40 to 40, and chroma b* ranging from -40 to 40 It’s better, the lightness L* is 10～80, the chroma a* is -30～30, the chroma b* is -30～30, and the lightness L* is 15～70, and the chroma a* is -20-20, chromaticity b* is -20-20 is more preferable. Since the frame material 8 has such a hue, it is easily recognized by the human eye as a frame material with a high-quality visual sense. Furthermore, since the colored adhesive layer 12 in this embodiment has the above-mentioned color tone of the frame material 8, the overall feeling with the frame material 8 is improved, and the appearance coordination becomes more favorable.

The above-mentioned displays 10A and 10B have an anti-scattering adhesive sheet 1 having a colored adhesive layer 12 attached to the protective panel 2, so that the appearance coordination with the frame material 8 when closed is good, and the design becomes high. Furthermore, even if the protective panel 2 is broken due to impact or the like, by attaching the anti-scattering adhesive sheet 1 to the protective panel 2, the broken protective panel 2 can be prevented from scattering.

The embodiments described above are described in order to facilitate the understanding of the present invention, and are not described in order to limit the present invention. Therefore, it means that each requirement disclosed in the above-mentioned embodiment also includes all design changes and equivalents falling within the technical scope of the present invention.

For example, the release sheet 13 in the anti-scattering adhesive sheet 1 may be omitted. In addition, another layer may be laminated on the surface of the base material 11 on the opposite side to the colored adhesive layer 12. Furthermore, another layer may be laminated between the base material 11 and the colored adhesive layer 12. [Example]

Hereinafter, the present invention will be explained more specifically through examples and the like, but the scope of the present invention is not limited to these examples and the like.

[Example 1] 1. Preparation of (meth)acrylate polymer The solution polymerization method was used to copolymerize 60 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of methyl methacrylate, and 20 parts by mass of 2-hydroxyethyl acrylate to prepare (meth)acrylate polymerization物(A). The molecular weight of this (meth)acrylate polymer (A) was measured using the method described later, and the weight average molecular weight (Mw) was 700,000.

2. Preparation of adhesive composition 100 parts by mass of the (meth)acrylate polymer (A) obtained in step 1 above (calculated as solid content, the same applies hereinafter), and 0.20 parts by mass of trimethylol as the crosslinking agent (B) Propane-modified toluene diisocyanate (manufactured by Toyo Chemical Co., Ltd., product name "BHS8515"), 0.5 parts by mass of carbon black-based black pigment (C1) as colorant (C), and 0.2 parts by mass as silane The 3-glycidoxypropyltrimethoxysilane of the coupling agent is mixed, stirred thoroughly, and diluted with methyl ethyl ketone to obtain a coating solution of the adhesive composition.

Here, when the (meth)acrylate polymer (A) is set to 100 parts by mass (value in solid content conversion), each formulation (value in solid content conversion) of the adhesive composition is shown in the table 1 shown. In addition, the details of the abbreviations and the like described in Table 1 are as follows. [(Meth)acrylate polymer (A)] 2EHA: 2-ethylhexyl acrylate MMA: methyl methacrylate HEA: 2-hydroxyethyl acrylate BA: n-butyl acrylate AA: Acrylic MA: methyl acrylate IBXA: Isobornyl acrylate ACMO: N-acrylic methacrylate [Crosslinking agent (B)] TDI: Trimethylolpropane modified toluene diisocyanate Epoxy resin: 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane [Colorant (C)] C1~C2: Carbon black black pigments with the physical properties shown in Table 2 [Active energy ray hardening component (D)] ε-caprolactone modified tris-(2-propenyloxyethyl) isocyanurate [Photopolymerization initiator (E)] 2,4,6-Trimethylbenzyl-diphenylphosphine oxide [Silane Coupling Agent] 3-glycidoxypropyl trimethoxysilane [Ultraviolet absorber] 2,2-Dihydroxy-4-methoxybenzophenone

3. Manufacture of Adhesive Sheet 100 parts by mass (expressed as a solid content conversion value, the following is the same for other components) as a coating solution for forming an anti-glare hard coat layer of polyfunctional (meth)acrylate (by Shinnakamura Chemical Industry Co., Ltd.) Manufactured, the product name is "NK ester A-DPH"), 4.3 parts by mass of 1-hydroxycyclohexyl phenyl ketone as a photopolymerization initiator, and 11 parts by mass of silica particles (manufactured by Fuji Silysia Chemical Co., Ltd.) , The product name is "Silo Hobic 702", the average particle size is 4.1μm), 0.01 parts by mass of leveling agent (manufactured by Toray Dow Corning (Toray Dow Corning), the product name is "SH28"), 8.3 parts by mass Silicon dioxide nanoparticles (manufactured by Nissan Chemical Industry Co., Ltd., product name "MIBK-ST", average particle size: 10 nm) are mixed and diluted with propylene glycol monomethyl ether to prepare a solid content of 30 % Coating solution.

Use mayer bar #10 on one side of polyethylene terephthalate (PET) film (manufactured by Toray, product name "125-U403", thickness: 125μm) The coating solution was applied so that the film thickness after drying was 1.5 μm, and dried at 70° C. for 1 minute. Subsequently, under a nitrogen atmosphere, using a high pressure mercury lamp illuminance of 200mW / cm 2, light quantity of ultraviolet radiation of 300mJ / cm ² to form a PET film (with pull antiglare hard coat layer (AG-HC layer) Elastic modulus of extension: 5.0GPa, haze value: 4.0%).

The coating solution of the adhesive composition obtained in step 2 above was applied using a knife coater to one side of the polyethylene terephthalate film using a silicone release agent to peel off. The peeling treatment surface of the obtained peeling sheet (manufactured by Lintec, the product name is "SP-PET752150"). Then, heat treatment was performed at 90°C for 1 minute to form a coating layer.

Next, the surface of the PET film with the AG-HC layer on the opposite side to the AG-HC layer was bonded to the coating layer, and cured at 23°C and 50% RH for 7 days to produce An anti-scattering adhesive sheet composed of a PET film with an AG-HC layer/colored adhesive layer (thickness: 25μm)/release sheet.

In addition, the thickness of the above-mentioned colored adhesive layer is a value measured using a constant-pressure thickness gauge (manufactured by TECLOCK, product name "PG-02") in accordance with JIS K7130.

[Examples 2-9, Comparative Examples 1-3] In addition to the types and ratios of the monomers constituting the (meth)acrylate polymer (A), the weight average molecular weight (Mw) of the (meth)acrylate polymer (A), and the type of crosslinking agent (B) And blending amount, type and blending amount of coloring agent (C), blending amount of active energy ray curable component (D), blending amount of photopolymerization initiator (E), blending amount of silane coupling agent, UV absorber Except that the blending amount of and the thickness of the adhesive layer were changed as shown in Table 1, the rest was the same as in Example 1 to produce an anti-scattering adhesive sheet. In addition, in Comparative Examples 1 to 3, an uncolored adhesive layer was formed. Furthermore, in Example 8, an active energy ray-curable colored adhesive layer was formed, while in Comparative Example 2, an active energy ray-curable adhesive layer was formed.

[Example 10] 100 parts by mass of addition reaction type silicone resin ("KS-847H" manufactured by Shin-Etsu Chemical Co., Ltd.) and 25 parts by mass of silicone resin ("SD-4584 manufactured by Toray Dow Corning" "), 0.6 parts by mass of platinum catalyst ("SRX 212 catalyst" manufactured by Toray Dow Corning Corporation), 0.5 parts by mass of carbon black pigment (C2) as a colorant (C), and 50 parts by mass of Mixing methyl ethyl ketone as a diluent to obtain a silicone adhesive composition coating solution. Using this coating solution, an anti-scattering adhesive sheet (having a colored adhesive layer composed of a silicone-based adhesive) was produced in the same manner as in Example 1. However, the coating layer was formed by heat treatment at 130°C for 1 minute.

[Comparative Example 4] Except that the colorant (C) was not formulated, the coating solution was prepared in the same manner as in Example 10, and the coating solution was used to produce an anti-scattering adhesive sheet (with a polysilicon Adhesive layer composed of oxygen-based adhesives).

[Example 11] Prepare 100 parts by mass of trifunctional polypropylene glycol (number average molecular weight: 1000), 7 parts by mass of toluene diisocyanate trimethylolpropane adduct, 0.01 parts by mass of dioctyltin dilaurate, and 43 parts by mass Toluene, and allowed to react at 100°C for 3 hours. Then, using an infrared spectrophotometer, cooling was performed when the presence of an isocyanate group could not be confirmed, and a solution of polyurethane polyol was obtained.

100 parts by mass of polyurethane polyol, 15 parts by mass of toluene diisocyanate trimethylolpropane adduct, and 0.5 parts by mass of carbon black pigment (C2) as colorant (C) were mixed , And fully stirred, and diluted with ethyl acetate to obtain a coating solution of the urethane-based adhesive composition. Using this coating solution, an anti-scattering adhesive sheet (having a colored adhesive layer composed of a urethane-based adhesive) was produced in the same manner as in Example 1. However, the coating layer was formed by heat treatment at 90°C for 1 minute.

[Comparative Example 5] Except that the colorant (C) was not formulated, the coating solution was prepared in the same manner as in Example 11, and the coating solution was used in the same manner as in Example 11 to produce an anti-scattering adhesive sheet (having an amine group Adhesive layer composed of formate-based adhesives).

The aforementioned weight average molecular weight (Mw) is a weight average molecular weight in terms of polystyrene measured (GPC measurement) using gel permeation chromatography (GPC) under the following conditions. <Measurement conditions> ‧GPC measuring device: HLC-8020 manufactured by Tosoh ‧GPC string (pass in the following order): manufactured by Tosoh TSK guard column HXL-H TSK gel GMHXL (x2) TSK gel G2000HXL ‧Measuring solvent: tetrahydrofuran (tetrahydrofuran) ‧Measuring temperature: 40℃

[Test Example 1] (Measurement of total light transmittance) For the anti-scattering adhesive sheets obtained in the examples and comparative examples (the peeling sheet has been peeled off), according to JIS K7361-1: 1997, a haze meter (manufactured by Nippon Denshoku Kogyo Co., Ltd., product name "NDH -5000") Measure the total light transmittance (%).

Furthermore, in the examples and comparative examples, on the coating layer of the adhesive composition, a peeling sheet was used instead of the PET film with the AG-HC layer to laminate to produce a peeling sheet/(coloring) adhesive A measurement sample composed of a layer (thickness: 25μm)/release sheet structure. With respect to the (colored) adhesive layer in the obtained measurement sample, the total light transmittance (%) was measured in the same manner as described above. The respective results are shown in Table 3.

[Test Example 2] (Measurement of Haze Value) For the anti-scattering adhesive sheet obtained in the examples and comparative examples (the peeling sheet has been peeled off), a haze meter (manufactured by Nippon Denshoku Kogyo Co., Ltd., product name is "NDH-5000") in accordance with JIS K7136: 2000 ”) Measure the haze value (%). In addition, with respect to the (colored) adhesive layer in the measurement sample produced in the same manner as in Test Example 1, the haze value (%) was measured in the same manner as described above. The respective results are shown in Table 3.

[Test Example 3] (Measurement of L*a*b*) For the anti-scattering adhesive sheets obtained in the examples and comparative examples (the peeling sheet has been peeled off), according to JIS K7136: 2000, a spectral colorimeter (manufactured by Nippon Denshoku Industries Co., Ltd., product name "SQ2000") to measure the lightness L*, chromaticity a* and chromaticity b* defined by the CIE1976L*a*b* color system. In addition, the lightness L*, the chromaticity a*, and the chromaticity b* were measured for the (colored) adhesive layer in the measurement sample prepared in the same manner as in Test Example 1 in the same manner as described above. The respective results are shown in Table 3.

[Test Example 4] (Measurement of Gel Fraction) The measurement sample produced in the same manner as in Test Example 1 was cut into a size of 80mm×80mm, and its (colored) adhesive layer was covered with a polyester mesh (product name: TETORON) mesh In #200), weigh its mass with a precision balance, and by subtracting the mass of the polyester net itself, the mass of only the adhesive is calculated. The mass at this time is set to M1.

Next, the adhesive coated in the polyester net was immersed in ethyl acetate at room temperature (23° C.) for 24 hours. After that, the adhesive was taken out, air-dried in an environment with a temperature of 23°C and a relative humidity of 50% for 24 hours, and further dried in an oven at 80°C for 12 hours. After drying, weigh the mass with a precision balance, and by subtracting the mass of the polyester net itself, the mass of only the adhesive is calculated. The mass at this time is set to M2. (M2/M1)×100 represents the gel fraction (%)​​. The results are shown in Table 3.

[Test Example 5] (Measurement of image clarity) For the anti-scattering adhesive sheet manufactured in the examples and comparative examples (the peeling sheet has been peeled off), an image measuring instrument (manufactured by Suga Tester Co., Ltd., product name "ICM-10P") is used, according to JIS K7374: 2007 transmission method, measured the image clarity (%) of 5 kinds of optical frequency combs (comb width: 0.125mm, 0.25mm, 0.5mm, 1.0mm and 2.0mm), and calculated the total. The results are shown in Table 3.

[Test Example 6] (Measurement of Adhesive Force) The anti-scattering adhesive sheet obtained in the Examples and Comparative Examples was cut into a width of 25 mm and a length of 100 mm, and this was used as a sample.

In an environment of 23°C and 50% RH, the peeling sheet was peeled from the above sample, and the exposed (colored) adhesive layer was attached to the soda lime glass (manufactured by Nippon Plate Glass Co., Ltd.), using Kurihara Manufacturing Co., Ltd. The manufactured autoclave was pressurized at 0.5 MPa and 50°C for 20 minutes. After that, it was left for 24 hours under the conditions of 23° C. and 50% RH.

For the anti-scattering adhesive sheets of Example 7 and Comparative Example 2, under the following conditions, active energy rays were irradiated through the PET film with the AG-HC layer to harden the (coloring) adhesive layer.

Next, under the conditions of a peeling speed of 300 mm/min and a peeling angle of 180 degrees, the adhesion force (N/25mm) was measured using a tensile tester (manufactured by Orientec, product name "TENSILON"). Except for the conditions described here, the measurement was performed in accordance with the standard of JIS Z0237:2009. The results are shown in Table 3.

<Active energy ray irradiation conditions> ^{‧Using a high-pressure mercury lamp ‧Illuminance is 200mW/cm 2} , luminosity is ^{2000mJ/cm 2} ‧UV illuminance ‧The light meter uses the product "UVPF-A1" manufactured by Eye Graphics

[Test Example 7] (Measurement of Pencil Hardness) The release sheet was peeled from the anti-scattering adhesive sheet obtained in the Examples and Comparative Examples, and the exposed (colored) adhesive layer was stuck on the soda lime glass. Then, according to JIS K5600, using an electric pencil scratch hardness tester (manufactured by Yasuda Seiki Co., Ltd., the product name is "No.553-M1"), the surface of the base material of the anti-scattering adhesive sheet (anti-glare Hard coating surface) pencil hardness. The results are shown in Table 3.

[Test Example 8] (Evaluation of Appearance Coordination) The release sheet was peeled off from the anti-scattering adhesive sheet obtained in the examples and comparative examples, and the exposed (colored) adhesive layer was attached to soda lime glass (manufactured by Nippon Plate Glass Co., Ltd., length 70mm×width 70mm × thickness 1.1mm). A frame material (L*: 38.5, a*: -0.2, b*: 0.3) made of black resin-made plastic was attached to the edge of the obtained laminate, and this was used as a sample.

Place the obtained sample on black paper (L*: 29.8, a*: -0.7, b*: 0.6) as a background. Then, for this sample, under a three-wavelength fluorescent lamp (distance from the fluorescent lamp: 200cm), visually judge whether the frame material and the inner part of the frame material (corresponding to the display part of the display) are compatible (with an overall Sense), and evaluate the appearance coordination according to the following criteria. The results are shown in Table 3. ◎: The frame material and the display part are very harmonious. ○: There is a certain degree of harmony between the frame material and the display part. ╳: There is a clear discordance between the frame material and the display part.

In addition, the chromaticity of the frame material and the paper printed in black (L*a*b* defined by the CIE1976 L*a*b* color system) uses a spectrophotometer (manufactured by BYK, product name "Measured by "Spectro-Guide").

[Test Example 9] (Evaluation of visibility) On a 15.6-inch display with a resolution of 1366x768 (manufactured by Fujitsu, the product name is "LITEBOOK A574/H"), the size of 5pt to 20pt (each 1pt as a unit) 100% white background, black Text (font: MS P Gothic).

A sample made in the same manner as in Test Example 8 was placed on the above-mentioned display. Then, at a position 50 cm away from the display, visually confirm whether the size of the text can be recognized, and evaluate the visibility according to the following criteria. The results are shown in Table 3. ◎: 6pt characters can be recognized. ○: The characters of 6pt are not completely recognizable, but the characters of 8pt can be distinguished. △: 8pt characters are not completely recognizable, but 15pt characters can be distinguished. ╳: 15pt text cannot be distinguished.

[Test Example 10] (Evaluation of black tone imparting property) On a 15.6-inch display with a resolution of 1366x768 (manufactured by Fujitsu, the product name is "LITEBOOK A574/H"), 100% of the white background and black text (font: MS P Gothic) are displayed at a size of 50pt. .

A sample made in the same manner as in Test Example 8 was placed on the above-mentioned display. Then, at a position 50 cm away from the display, the change in the black tone of the text before and when the sample was placed was visually confirmed, and the black tone imparting ability was evaluated according to the following criteria. The results are shown in Table 3. ◎: When the sample is placed, the black tone of the text increases, making it easier to see. ○: When the sample is placed, the black tone of the text rises, but the background is dark and it becomes difficult to see. ╳: Before and after placing the sample, the black tone of the text has not changed.

[Test Example 11] (Evaluation of Scatter Resistance) The peeling sheet of the anti-scattering adhesive sheet obtained in the Examples and Comparative Examples was peeled off, and the exposed (colored) adhesive layer was bonded to a soda lime glass plate of 170 mm in length × 150 mm in width × 1 mm in thickness (made by Japan Manufactured by Plate Glass Company). After that, the laminate composed of the above-mentioned glass plate and the anti-scattering adhesive sheet was placed on two platforms set on the table with a height of 10 mm. At this time, the side of the anti-scattering adhesive sheet is placed upward (in the direction opposite to the above-mentioned platform), and the laminated body is placed on the above-mentioned platform from both ends in the longitudinal direction of the laminate to 10 mm. The central part is in a floating state (height is 10mm). Then, an iron ball (200 g) with a diameter of 31.75 mm was dropped from a height of 30 cm on the central part of the laminate. The state of the laminate after this step was visually observed, and the scatter resistance was evaluated according to the following criteria. The results are shown in Table 3. ○: The anti-scattering adhesive sheet is not broken, and the glass is not scattered. ╳: The anti-scattering adhesive sheet is broken and the glass is scattered.

[Table 1] Acrylate polymer (A) Crosslinking agent (B) Colorant (C) Active energy ray hardening ingredients (D) Photopolymerization initiator (E) Silane coupling agent UV absorber Adhesive layer thickness composition Mw type Mass parts type Mass parts Mass parts Mass parts Mass parts Mass parts µm Example 1 2EHA/MMA/HEA =60/20/20 700 thousand TDI 0.2 C1 0.5 - - 0.2 - 25 Example 2 TDI 0.2 C2 0.5 - - 0.2 - 25 Example 3 TDI 0.2 C2 0.9 - - 0.2 - 25 Example 4 TDI 0.2 C2 0.5 - - 0.2 0.17 25 Example 5 TDI 0.2 C2 1.5 - - 0.2 - 25 Example 6 BA/AA =90/10 500000 Epoxy 0.06 C2 0.5 - - - - 25 Example 7 BA/MA/AA =77/20//3 1000000 TDI 2.4 C2 0.5 - - 0.2 - 25 Example 8 2EHA/IBXA/ACMO/HEA =65/10/10/15 500000 TDI 0.2 C2 0.5 5.0 0.5 0.2 - 50 Example 9 TDI 0.2 C2 0.5 - - 0.2 - 50 Comparative example 1 2EHA/MMA/HEA =60/20/20 700 thousand TDI 0.2 - - - - 0.2 - 25 Comparative example 2 2EHA/IBXA/ACMO/HEA =65/10/10/15 500000 TDI 0.2 - - 5.0 0.5 0.2 - 50 Comparative example 3 TDI 0.2 - - - - 0.2 - 50 Example 10 Polysiloxane adhesive - - - C2 0.5 - - - - 25 Example 11 Polyurethane adhesive - - - C2 0.5 - - - - 25 Comparative example 4 Polysiloxane adhesive - - - - - - - - - 25 Comparative example 5 Polyurethane adhesive - - - - - - - - - 25

[Table 2] Types of colorants 380nm haze value (%) 780nm haze value (%) Haze value difference (points) Average haze (%) Standard deviation of haze value C1 25.0 23.7 1.3 24.89 0.48 C2 10.1 2.3 7.8 4.11 1.49

[table 3] (Coloring) adhesive layer Anti-scattering adhesive sheet Appearance coordination Discernibility Black tones Anti-scattering Gel fraction (%) Total light transmittance (%) Haze value (%) L* a* b* Adhesion (N/25mm) Total light transmittance (%) Haze value (%) L* a* b* Image clarity (the sum of 5 optical frequency combs) Pencil hardness Example 1 74 70 17.4 84 -0.1 0.8 10 63.7 20.2 84 -0.2 1.1 418 H ○ ◎ ◎ ○ Example 2 69 50 4.0 73 -1.3 -0.3 12 44.4 9.4 72 -1.4 0.1 418 H ◎ ◎ ◎ ○ Example 3 75 26 10.2 55 -1.9 -1.1 12 23.1 18.0 55 -1.9 -0.6 412 H ◎ ○ ○ ○ Example 4 70 50 4.0 72 -1.1 -0.2 12 44.3 9.5 72 -1.3 0.2 415 H ◎ ◎ ◎ ○ Example 5 69 14 24.7 35 -2.3 -1.6 9 8.9 31.2 35 -2.4 -1.4 410 H ◎ ╳ ○ ○ Example 6 70 50 1.1 74 -1 0.3 17 44.9 6.0 73 -1.1 0.6 419 H ◎ ◎ ◎ ○ Example 7 76 50 1.4 73 -1.2 0.4 twenty two 44.5 6.5 73 -1.2 0.4 418 H ◎ ◎ ◎ ○ Example 8 70 67 3.0 82 -1.5 0.8 34 61.0 7.5 82 -1.1 1.2 407 F ○ ◎ ◎ ○ Example 9 53 65 3.1 80 -1.4 0.7 35 60.0 7.5 80 -1.1 1.2 408 F ◎ ◎ ◎ ○ Example 10 - 81 10.0 90 -0.7 0.6 0.2 75.2 15.2 90 -0.7 0.6 400 H ○ ◎ ◎ ○ Example 11 - 80 10.1 90 -0.7 0.6 0.1 74.0 14.9 90 -0.7 0.6 401 H ○ ◎ ◎ ○ Comparative example 1 75 99 0.3 96 -0.3 0.2 twenty one 89.8 4.7 96 -0.3 0.7 416 H ╳ ◎ ╳ ○ Comparative example 2 72 99 0.1 96 -0.3 0.2 35 90.1 5.2 96 -0.4 0.8 412 F ╳ ◎ ╳ ○ Comparative example 3 59 99 0.1 96 -0.3 0.2 36 90.2 5.1 96 -0.4 0.8 413 F ╳ ◎ ╳ ○ Comparative example 4 - 99 0.2 96 -0.3 0.2 0.2 89.7 5.2 96 -0.4 0.8 413 H ╳ ◎ ╳ ○ Comparative example 5 - 99 0.2 96 -0.3 0.2 0.1 90.0 5.9 96 -0.4 0.9 404 H ╳ ◎ ╳ ○

It can be seen from Table 3 that the sample using the anti-scattering adhesive sheet obtained in the example has excellent appearance coordination with the frame material, and also has excellent character visibility, black tone imparting properties, and Anti-scattering. [Industrial Profitability]

The anti-scattering adhesive sheet of the present invention can be suitably used for, for example, displays that need to have appearance coordination with peripheral components when closed, especially for automotive displays.

1: Anti-scattering adhesive sheet 2: Protection panel 3: Transparent conductive film 4: Adhesive layer 5: Thin film sensor 6: Adhesive layer 7: Display module 8: Frame material 10A, 10B: display 11: Substrate 12: Colored adhesive layer 13: Peel off sheet 51: base film 52: Transparent conductive film

[Fig. 1] is a cross-sectional view of an anti-scattering adhesive sheet according to an embodiment of the present invention. [Fig. 2] is a cross-sectional view of a display according to an embodiment of the present invention. Fig. 3 is a cross-sectional view of a display according to another embodiment of the present invention. Fig. 4 is a plan view of a display with a frame material according to an embodiment of the present invention.

1: Anti-scattering adhesive sheet

11: Substrate

12: Colored adhesive layer

13: Peel off sheet

Claims (9)

An anti-scattering adhesive sheet, which is an anti-scattering adhesive sheet provided on at least one surface side of a protective panel used for a display, and includes a substrate and a colored adhesive layer. The anti-scattering adhesive sheet according to claim 1, wherein the lightness L* defined by the CIE1976 L*a*b* color system is 92 or less. The anti-scatter adhesive sheet according to claim 1, wherein the sum of the image sharpness of the 0.125mm, 0.25mm, 0.5mm, 1.0mm, and 2.0mm optical frequency combs measured according to JIS K7374:2007 is 400 or more. The anti-scattering adhesive sheet according to claim 1, wherein the total light transmittance is 5% or more and 95% or less. The anti-scattering adhesive sheet according to claim 1, wherein the adhesive constituting the colored adhesive layer contains a coloring agent. The anti-scattering adhesive sheet according to claim 1, wherein the base material is a plastic film with a functional layer. A display is a display including a protective panel, wherein the anti-scattering adhesive sheet according to any one of claims 1 to 6 is arranged on one surface side or both surface sides of the protective panel. The display according to claim 7 has a frame material on the periphery. The display according to claim 7, wherein a printing layer is formed on a part of a display component constituting the aforementioned display.

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