TWI870513B - Anti-scattering adhesive sheet and display - Google Patents

Abstract

[Topic] Provide an anti-scattering adhesive sheet capable of improving the design of a display, and a display with improved design. [Solution] An anti-scattering adhesive sheet 1, which is provided on at least one surface side of a protective panel 2 used for a display, and includes a substrate 11 and a colored adhesive layer 12. The anti-scattering adhesive sheet 1 preferably has a lightness L* of 92 or less as defined by the CIE1976 L*a*b* colorimetric system, preferably has an optical frequency comb of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm measured according to JIS K7374:2007, and preferably has a total light transmittance of 5% or more and 95% or less.

Description

Anti-scattering adhesive sheet and display

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

In recent years, liquid crystal display devices or organic electroluminescent elements are often used in displays such as instrument panels, car navigation systems, and various instruments installed in consoles, tablet computers used by general users, tablet computers or digital signage for business use, and outdoor electronic signage.

In displays such as those used in cars, when the display is closed, it is sometimes necessary to show a sense of unity with the surrounding parts of the display, such as a frame material, to improve the design. For this reason, coloring the display is considered, and patent documents 1 to 4 disclose inventions related to coloring the display. [Prior art document] [Patent document]

[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 that the invention is trying to solve]

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

On the other hand, when a mobile display is dropped or a car display is hit by an accident, the protective panel may break and its fragments may scatter. Therefore, a solution has been proposed to attach an anti-scattering adhesive sheet to the protective panel to prevent the broken protective panel from scattering.

In view of the above situation, the object of the present invention is to provide an anti-scattering adhesive sheet capable of improving the design of a display, and a display with improved design. [Means for solving the problem]

In order to achieve the above object, first, the present invention provides an anti-scattering adhesive sheet, which 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 (Invention 1).

Since the anti-scattering adhesive sheet according to the above invention (Invention 1) has a colored adhesive layer, the display obtained by arranging the anti-scattering adhesive sheet on at least one surface side of the protective panel has good coordination in appearance with peripheral parts such as the frame material of the display, the frame-shaped printed layer, and the printed layer for displaying characters and symbols when the display is closed, thereby improving 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 optical frequency combs of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm and 2.0 mm measured according to 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 colorant (Invention 5).

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

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

In the above invention (Invention 7), it is preferred that a frame material is provided on the peripheral portion (Invention 8).

In the above inventions (Inventions 7 and 8), it is preferred that a printed layer is formed on a portion of a display component constituting the above 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, according to the display body of the present invention, the design is improved due to the anti-scattering adhesive sheet.

The following is a description of an embodiment of the present invention. [Anti-scattering adhesive sheet] An 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. Details of the display and the protective 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, the display obtained by arranging the anti-scattering adhesive sheet on at least one surface side of the protective panel, for example, when closed, has good coordination in appearance with peripheral parts such as the frame material of the display, the frame-shaped printed layer, and the printed layer for displaying characters and symbols, thereby improving the design. Furthermore, even if the protective panel is broken due to impact, by attaching the anti-scattering adhesive sheet to the protective panel, the broken protective panel can be prevented from scattering.

The lightness L* of the anti-scattering adhesive sheet defined by the CIE1976 L*a*b* color system is preferably 92 or less, more preferably 86 or less, particularly preferably 83 or less, and even more preferably 80 or less. In this way, when the display is turned off, the display can be given a sense of unity with the black frame material and the printed layer, thereby improving the coordination of the appearance.

On the other hand, from the viewpoint of improving the design and visibility of the display by the appearance coordination, the lower limit value of the lightness L* is preferably 10 or more, more preferably 20 or more, particularly preferably 40 or more, more preferably 50 or more, and most preferably 60 or more. In addition, the measurement method of the lightness L*, chromaticity a* and b* defined by the CIE1976 L*a*b* colorimetric system in this specification is described in the test examples described later.

Furthermore, the chromaticity a* of the anti-scattering adhesive sheet defined by the CIE1976 L*a*b* colorimetric system is preferably -20 to 20, more preferably -10 to 10, particularly preferably -5 to 5, more preferably -2 to 2, and most preferably -1.5 to 1.5. By setting the chromaticity a* within the above range, the visibility of the display is improved, and the design, especially the appearance coordination of the automotive display, is further improved.

Furthermore, the chromaticity b* of the anti-scattering adhesive sheet defined by the CIE1976 L*a*b* colorimetric system is preferably -20 to 20, more preferably -10 to 10, particularly preferably -5 to 5, more preferably -2 to 2, and most preferably -1.2 to 1.2. By setting the chromaticity b* within the above range, the visibility of the display is improved, and the design, especially the appearance coordination of the automotive display, is further improved.

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

On the other hand, the sum of the above image clarity (%) is preferably 500 or less, more preferably 450 or less, particularly preferably 430 or less, and even more preferably 420 or less. In this way, while the image/video on the display maintains good visibility, the lightness L* becomes easy to be within the above range.

Here, the image clarity is measured by passing 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 tooth width) between the transmission part and the light-shielding part in the optical frequency comb, the higher the image clarity. Image clarity is measured according to the transmission method of JIS K7374:2007. The specific measurement method is described in the test example described later.

The total light transmittance of the anti-scattering adhesive sheet (excluding the release sheet) according to the present embodiment is preferably 5% or more, more preferably 20% or more, particularly preferably 30% or more, and even more preferably 40% or more. In this way, the visibility of the image/video of the resulting display becomes good, and in particular, it can suppress the boundary between the black display portion and the portion other than the black display portion from becoming unclear when the resulting display is turned on. The upper limit of the above-mentioned total light transmittance is not particularly limited, and is usually 100% or less. Considering the relationship with the lightness L*, it is preferably 95% or less. Considering the property of giving a black tone to the black display portion of the display, it is preferably 85% or less, particularly preferably 75% or less, more preferably 65% or less, and best 60% or less. In addition, the total light transmittance in this specification is a value measured according to JIS K7361-1:1997.

In addition, the coloring degree (coloring concentration distribution) in the anti-scattering adhesive sheet (colored adhesive layer) according to this embodiment is preferably uniform in the plane direction. In this way, the design (especially the appearance coordination) and visibility of the display become better.

FIG1 shows a specific structure of an example of an anti-scattering adhesive sheet according to the present embodiment. As shown in FIG1 , the anti-scattering adhesive sheet 1 is composed of a substrate 11, a colored adhesive layer 12 laminated on one surface of the substrate 11, and a release sheet 13 laminated on the surface of the colored adhesive layer 12 on the opposite side of the substrate 11. The colored adhesive layer 12 is in contact with the release surface of the release sheet 13. In addition, in this specification, the release surface of the release sheet means a surface having a release property in the release sheet, and also includes any one of a surface to which a release treatment is applied and a surface that can exhibit a release property without applying a release treatment.

1. Each component 1-1. Base material The base material 11 may be made of a material having a strength that can prevent the protective panel (glass or plastic fragments) from scattering when the protective panel of the adherend is broken. The base material 11 is usually mainly composed of a plastic film, but may be composed of only a plastic film, or may be a base material having a desired functional layer formed on a plastic film.

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

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

Furthermore, in order to improve the adhesion between the above-mentioned plastic film and the film layer (colored adhesive layer 12, functional layer, etc.) deposited on the surface thereof, the surface treatment may be applied to one or both sides by primer treatment, oxidation method, embossing method, etc. as required. Examples of oxidation methods include corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, ozone/ultraviolet treatment, etc., and examples of embossing methods include sandblasting method, solvent treatment method, etc. These surface treatment methods may be appropriately selected according to the type of plastic film.

Examples of the functions of the functional layer include hard coating, anti-glare, anti-fingerprint, slip, anti-static, improved writing quality, anti-Newton ring, and high transparency. The functional layer may have a plurality of these functions. Furthermore, these functions may differ depending on whether the anti-scattering adhesive sheet 1 is disposed on the front side of the protective panel or on the back side.

As the functional layer, a hard coating layer is preferred from the viewpoint of improving the anti-scattering property, and a hard coating layer having functions other than the hard coating layer may be used. For example, when the anti-scattering adhesive sheet 1 is disposed on the front side of the protective panel, a hard coating layer having anti-fingerprint property, anti-glare property, improved writing quality, easy slip, high transparency, anti-static property, etc. is preferred. Furthermore, when the anti-scattering adhesive sheet 1 is disposed on the back side of the protective panel, a hard coating layer having anti-Newton ring property, anti-glare property, high transparency, anti-static property, etc. is preferred.

In addition, the substrate 11 in this embodiment is preferably not provided with an anti-reflection layer. If provided with an anti-reflection layer, the hardness of the surface may be reduced, and the desired appearance coordination may not be obtained.

The hard coating layer is usually formed by hardening a coating composition that contains an active energy ray-hardening compound as an essential component and, if necessary, contains a leveling agent, a filler, a photopolymerization initiator, etc. As the active energy ray-hardening compound, it is preferred to use a multifunctional (meth)acrylate. In addition, in this specification, the so-called (meth)acrylate means both acrylate and methacrylate. The same applies to other similar terms.

From the perspective of improving anti-scattering properties, the thickness of the hard coating layer is preferably 0.5 to 20 μm, particularly preferably 1 to 10 μm, and more preferably 1.5 to 5 μm.

From the viewpoint of anti-scattering and suppression of dents, the thickness of the substrate 11 (including the functional layer if it has a functional layer) is preferably 10 μm or more, more preferably 20 μm or more, particularly preferably 40 μm or more, more preferably 80 μm or more, and most preferably 105 μm or more. On the other hand, from the viewpoint of processability such as roll-to-roll and thinning of the display, the thickness is preferably 200 μm or less, particularly preferably 150 μm or less, and more preferably 130 μm or less.

From the viewpoint of anti-scattering and suppression of dents, the tensile elastic modulus of the substrate 11 (including the functional layer when having the functional layer) is preferably 1.5 GPa or more, particularly preferably 3.0 GPa or more, and more preferably 4.0 GPa or more. On the other hand, from the viewpoint of substrate shrinkage, the tensile elastic 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, and may be, for example, any of acrylic adhesives, polyester adhesives, polyurethane adhesives, rubber adhesives, silicone adhesives, etc. Furthermore, the adhesive may be any of an emulsion type, a solvent type, or a solvent-free type, and may be any of a crosslinked type or a non-crosslinked type. Among them, acrylic adhesives, polyurethane adhesives, or silicone 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 adhesive that is hardened by active energy radiation or an adhesive that is not hardened by active energy radiation. The acrylic adhesive is preferably a crosslinking adhesive, and more preferably a thermal crosslinking adhesive.

Specifically, it is preferred that 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") is crosslinked to obtain the acrylic adhesive in the present embodiment. Furthermore, when an active energy ray-curable adhesive is used as the above-mentioned adhesive, it is preferred that the adhesive composition P further contains an active energy ray-curable component (D).

The adhesive obtained from the adhesive composition P can show excellent optical properties, adhesion, anti-scattering properties, etc. In addition, in this specification, the so-called (meth) acrylic acid means both acrylic acid and methacrylic acid. The same is true 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 preferably includes a reactive group-containing monomer having a reactive group that reacts with a crosslinking agent (B) in the molecule as a monomer unit constituting the polymer. The reactive group derived from the reactive group-containing monomer reacts with the crosslinking agent (B) to form a crosslinked structure (three-dimensional network structure), thereby obtaining an adhesive having the desired cohesive force.

Preferred examples of the reactive group-containing monomer include monomers having a hydroxyl group in the molecule (hydroxyl-containing monomers), monomers having a carboxyl group in the molecule (carboxyl-containing monomers), and monomers having an amine group in the molecule (amine-containing monomers). Among them, hydroxyl-containing monomers or carboxyl-containing monomers having excellent reactivity with the crosslinking agent (B) are preferred, and a hydroxyl-containing monomer and a carboxyl-containing monomer may be used in combination.

Examples of the hydroxyl group-containing monomer include hydroxyalkyl (meth)acrylates such as 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 3-hydroxybutyl (meth)acrylate, and 4-hydroxybutyl (meth)acrylate. Among them, hydroxyalkyl (meth)acrylates having a hydroxyalkyl group having 1 to 4 carbon atoms are preferred 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 dispersibility with the coloring agent (C) being improved. Specifically, for example, 2-hydroxyethyl (meth)acrylate, 4-hydroxybutyl (meth)acrylate, etc. are preferred, and 2-hydroxyethyl acrylate or 4-hydroxybutyl acrylate are particularly preferred. The above materials may be used alone or in combination of two or more.

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

Examples of the amino group-containing monomer include aminoethyl (meth)acrylate, n-butylaminoethyl (meth)acrylate, etc. These materials may be used alone or in combination of two or more.

In the (meth)acrylate polymer (A), the lower limit of the content of the reactive group-containing monomer as a monomer unit constituting the polymer is preferably 1 mass % or more, particularly preferably 3 mass % or more, and more preferably 10 mass % or more. When the reactive group-containing monomer includes only the hydroxyl group-containing monomer, the content is preferably 15 mass % or more, and particularly preferably 20 mass % or more. Furthermore, in the (meth)acrylate polymer (A), the upper limit of the content of the reactive group-containing monomer as a monomer unit constituting the polymer is preferably 35 mass % or less, particularly preferably 30 mass % or less, and more preferably 25 mass % or less. When the (meth)acrylate polymer (A) contains the reactive group-containing monomer as a monomer unit in the above-mentioned content, a good cross-linking structure is formed in the obtained adhesive, and the desired cohesive force and adhesiveness can be obtained. In this way, the obtained adhesive has a predetermined adhesiveness, and even if it is impacted, it can mitigate the impact and prevent the protective panel from breaking, and even if the protective panel breaks, it can also suppress the scattering of the fragments. Furthermore, since it has excellent adhesion with the substrate constituting the anti-scattering adhesive sheet, even if the fragments penetrate the adhesive layer and reach the substrate side, it can suppress the anti-scattering adhesive sheet itself from tearing. Furthermore, the dispersibility of the colorant (C) in the adhesive tends to be good, and the obtained adhesive has good reproducibility and uniformity with respect to the above-mentioned optical properties, which can provide better design and visibility.

Furthermore, it is also preferred 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 suppress defects caused by the acid in the object to which the adhesive is attached, for example, even in the presence of a transparent conductive film such as indium tin oxide (ITO) or a metal film, it is possible to suppress those problems caused by the acid (corrosion, resistance value change, etc.). However, it is permissible to contain a predetermined amount of carboxyl group-containing monomer to the extent that the above-mentioned defects are not generated. Specifically, in the (meth)acrylate polymer (A), the content of the carboxyl group-containing monomer as a monomer unit is allowed to be 0.1% by mass or less, preferably 0.01% by mass or less, and more preferably 0.001% by mass or less.

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 achieved. The alkyl group may be a linear chain or a branched chain.

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

In the (meth)acrylate polymer (A), the content of the (meth)acrylate alkyl ester as a monomer unit constituting the polymer is preferably 45 mass % or more, particularly preferably 55 mass % or more, and more preferably 65 mass % or more. When the lower limit of the content of the (meth)acrylate alkyl ester is as described above, the (meth)acrylate polymer (A) can exhibit appropriate adhesion. 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 adhesion. In this way, the obtained adhesive can exhibit appropriate adhesion, and at the same time, the reproducibility and uniformity of the above-mentioned optical properties also become good, which can provide better design and visibility.

On the other hand, in the (meth)acrylate polymer (A), the content of the (meth)acrylate alkyl ester as a monomer unit constituting the polymer is preferably 99 mass % or less, particularly preferably 95 mass % or less, and more preferably 90 mass % or less. Further, in the case of including a hydroxyl group-containing monomer as a monomer constituting the polymer, the content of the (meth)acrylate alkyl ester as a monomer unit constituting the polymer is preferably 85 mass % or less, and particularly preferably 80 mass % or less. When the upper limit of the content of the (meth)acrylate alkyl ester is as described above, other monomer components such as a monomer containing a reactive functional group can be introduced into the (meth)acrylate polymer (A) in an appropriate amount.

In the above (meth)acrylate polymer (A), it is preferred that a monomer having an alicyclic structure (alicyclic structure-containing monomer) is contained in the molecule as a monomer unit constituting the polymer. The alicyclic structure-containing monomer has a large volume, and therefore it is inferred that the presence of the monomer in the polymer increases the spacing between polymers, and the resulting adhesive can have excellent flexibility. In this way, the adhesive itself has excellent anti-scattering properties.

The carbon ring having an alicyclic structure in the alicyclic structure-containing monomer may be a saturated carbon ring or a partially unsaturated carbon ring. The alicyclic structure may be a monocyclic alicyclic structure or a polycyclic alicyclic structure such as a bicyclic or tricyclic alicyclic structure. From the viewpoint of maintaining an appropriate distance between the obtained (meth)acrylate polymer (A) and imparting high stress relaxation properties by the adhesive, the alicyclic structure is preferably a polycyclic alicyclic structure (polycyclic structure). Furthermore, considering the miscibility between the (meth)acrylate polymer (A) and other components, the polycyclic structure is particularly preferably a bicyclic to tetracyclic structure. Furthermore, as described above, from the viewpoint of imparting stress relaxation, the number of carbon atoms in the alicyclic structure (meaning the total number of carbon atoms in the portion forming the ring, and when multiple rings are independent of each other, the total number of carbon atoms in total) is usually preferably 5 or more, and particularly preferably 7 or more. On the other hand, the upper limit of the number of carbon atoms in the alicyclic structure is not particularly limited, but as described above, from the viewpoint of miscibility, it is preferably 15 or less, and particularly preferably 10 or less.

As the above-mentioned alicyclic structure-containing monomer, specifically, cyclohexyl (meth)acrylate, dicyclopentyl (meth)acrylate, adamantyl (meth)acrylate, isoborneol (meth)acrylate, dicyclopentenyl (meth)acrylate, dicyclopentenyloxyethyl (meth)acrylate, etc. can be listed. Among them, dicyclopentyl (meth)acrylate (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 isoborneol acrylate (meth)acrylate (the number of carbon atoms in the alicyclic structure is 7) which can show better anti-scattering properties are preferred, isoborneol (meth)acrylate is particularly preferred, and isoborneol acrylate is more preferred. The above-mentioned materials can be used alone or in combination of two or more.

When the (meth)acrylate polymer (A) includes a monomer containing an alicyclic structure as a monomer unit constituting the polymer, the content of the alicyclic structure monomer is preferably 1% by mass or more, particularly preferably 4% by mass or more, and more preferably 8% by mass or more. Furthermore, in the (meth)acrylate polymer (A), the content of the alicyclic structure monomer as a monomer unit constituting the polymer is preferably 30% by mass or less, particularly preferably 22% by mass or less, and more preferably 14% by mass or less. When the content of the alicyclic structure monomer is within the above range, the obtained adhesive has a better anti-scattering property and a better adhesion to plastics.

Furthermore, the (meth)acrylate polymer (A) preferably contains a nitrogen-containing monomer as a monomer unit constituting the polymer. By having a nitrogen-containing monomer as a constituent unit in the polymer, a predetermined polarity can be imparted to the adhesive layer, and the adhesive layer also has excellent affinity for adherends having polarity such as glass. From the perspective of imparting appropriate rigidity to the (meth)acrylate polymer (A), the nitrogen-containing monomer is preferably a monomer having a nitrogen-containing heterocyclic ring. Furthermore, from the viewpoint of increasing the degree of freedom of the nitrogen-containing monomer-derived portion in the high-order structure of the adhesive to be formed, the nitrogen-containing monomer preferably does not contain a reactive unsaturated double bond group other than one polymerizable group used for polymerization to form the (meth)acrylate polymer (A).

As the monomer having a nitrogen-containing heterocyclic ring, for example, N-(methyl)acryloyl phenoxyethanol, N-vinyl-2-pyrrolidone, N-(methyl)acryloyl pyrrolidone, N-(methyl)acryloyl piperidine, N-(methyl)acryloyl pyrrolidine, N-(methyl)acryloyl aziridine, aziridinylethyl (methyl)acrylate, 2-vinyl pyridine, 4-vinyl pyridine, 2-vinyl pyrazine, 1-vinylimidazole, N-vinyl carbazole, N-vinyl o-phthalimide, etc. can be listed. Among them, N-(methyl)acryloyl phenoxyethanol is preferred because it can exert a better adhesion, and N-acryloyl phenoxyethanol is particularly preferred. The above materials can be used alone or in combination of two or more.

When the (meth)acrylate polymer (A) includes a nitrogen atom-containing monomer as a monomer unit constituting the polymer, the content of the nitrogen atom-containing monomer is preferably 1 mass % or more, particularly preferably 4 mass % or more, and more preferably 8 mass % or more. Furthermore, in the (meth)acrylate polymer (A), the content of the nitrogen atom-containing monomer as a monomer unit constituting the polymer is preferably 20 mass % or less, particularly preferably 16 mass % or less, and more preferably 12 mass % or less. When the content of the nitrogen atom-containing monomer is within the above range, the obtained adhesive can have a more excellent anti-scattering property and can fully exhibit excellent adhesion to glass.

The (meth)acrylate polymer (A) may also include other monomers as monomer units constituting the polymer as required. As other monomers, monomers that do not contain reactive functional groups are preferred in order not to hinder the aforementioned effects of the monomers containing reactive functional groups. Examples of such monomers include (meth)acrylate alkoxyalkyl esters such as methoxyethyl (meth)acrylate and ethoxyethyl (meth)acrylate, vinyl acetate, styrene, and the like. The above materials may be used alone or in combination of two or more.

The (meth)acrylate polymer (A) is preferably a linear polymer. Since it is a linear polymer, it is easy to form a molecular chain, and it is expected that the cohesive force can be improved, so it is easy to obtain an adhesive with excellent anti-scattering properties.

Furthermore, the (meth)acrylate polymer (A) is preferably a solution polymer obtained by solution polymerization. Since it is a solution polymer, it is easy to obtain a polymer with a 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 anti-scattering properties.

The polymerization form 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, and from the viewpoint of the dispersibility of the colorant (C), it is more preferably 450,000 or more. When the lower limit of the weight average molecular weight of the (meth)acrylate polymer (A) is the above value, the anti-scattering property of the obtained adhesive becomes more excellent. Furthermore, the dispersibility of the colorant (C) in the adhesive tends to become good, so that the obtained adhesive becomes good in reproducibility and uniformity of the above-mentioned optical properties, and can provide more excellent design and visibility.

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 of the weight average molecular weight of the (meth)acrylate polymer (A) is the above value, the anti-scattering property of the obtained adhesive becomes more excellent. In addition, the weight average molecular weight in this specification is a value converted to standard polystyrene measured by gel permeation chromatography (GPC).

In the adhesive composition P, the (meth)acrylate polymer (A) may be used alone or in combination of two or more.

(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 resulting adhesive is improved, and the anti-scattering property becomes excellent.

The crosslinking agent (B) mentioned above may be any crosslinking agent that can react with the reactive group of the (meth)acrylate polymer (A), and examples thereof include isocyanate crosslinking agents, epoxy crosslinking agents, amine crosslinking agents, melamine crosslinking agents, aziridine crosslinking agents, hydrazine crosslinking agents, aldehyde crosslinking agents, oxazoline crosslinking agents, metal alkoxide crosslinking agents, metal chelate crosslinking agents, metal salt crosslinking agents, and ammonium salt crosslinking agents. Among them, when the reactive group of the (meth)acrylate polymer (A) is a hydroxyl group, it is preferable to use an isocyanate crosslinking agent having excellent reactivity with a hydroxyl group, and when the reactive group of the (meth)acrylate polymer (A) is a carboxyl group, it is preferable to use an epoxy crosslinking agent having excellent reactivity with a carboxyl group. In addition, the crosslinking agent (B) may be used alone or in combination of two or more.

Isocyanate crosslinking agents include at least polyisocyanate compounds. Examples of polyisocyanate compounds include aromatic polyisocyanates such as toluene diisocyanate, diphenylmethane diisocyanate, and xylene diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, alicyclic polyisocyanates such as isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate, and their biuret forms, isocyanurate forms, and adducts of the above-mentioned reaction products with low molecular weight active hydrogen-containing compounds such as ethylene glycol, propylene glycol, neopentyl glycol, trihydroxymethylpropane, and castor oil. Among them, from the viewpoint of reactivity with a hydroxyl group, it is preferred to use a trihydroxymethylpropane-modified aromatic polyisocyanate, and trihydroxymethylpropane-modified toluene diisocyanate or trihydroxymethylpropane-modified xylene diisocyanate is particularly preferred.

Examples of epoxy crosslinking agents include 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane, N,N,N',N'-tetraglycidyl-m-xylylenediamine, ethylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, trihydroxymethylpropane diglycidyl ether, diglycidylaniline, and diglycidylamine. Among them, 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane is preferred from the viewpoint of reactivity with carboxyl groups.

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, relative to 100 parts by mass of the (meth)acrylate polymer (A). Furthermore, the content is preferably 10 parts by mass or less, more 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) Colorant (C) The colorant (C) may be a pigment or a dye. The pigment may be an inorganic pigment or an organic pigment. In view of the durability of the resulting adhesive, an inorganic pigment is preferred. The color of the colorant may be appropriately selected in consideration of the design of the display, especially the appearance coordination. Generally, dark or deep colors such as black, brown, navy blue, purple, blue, etc. are preferred, with black being particularly preferred.

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

Examples of organic pigments and organic dyes include aminium pigments, cyanine pigments, merocyanine pigments, croconium pigments, squalium pigments, azulenium pigments, polymethine pigments, naphthoquinone pigments, pyrylium pigments, phthalocyanine pigments, naphthalocyanine pigments, naphthocyanine pigments, and naphthocyanin pigments. lactam pigments, azo pigments, condensed azo pigments, indigo pigments, perinone pigments, perylene pigments, dioxazine pigments, quinacridone pigments, isoindolinone pigments, quinophthalone pigments, pyrrole pigments, thioindigo pigments, metal complex pigments (metal complex pigments), dithiol metal complex pigments, indole phenol pigments, triallylmethane pigments, anthraquinone pigments, naphthol pigments, azomethine pigments, benzimidazolone pigments, pyranthron pigments, and threne pigments, etc.

Examples of black pigments include carbon black, copper oxide, ferric oxide, manganese dioxide, aniline black, and activated carbon. Examples of black dyes include high-concentration plant dyes and azo dyes.

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

From the perspective of the aforementioned lightness L* (and chromaticity a*‧chromaticity b*), among the aforementioned coloring agents, carbon black, nigrosin-based black dyes, and chromate-based black dyes are preferred. In addition, the surface of carbon black may be subjected to a predetermined treatment (e.g., a solubility-affinity treatment), or it may not be subjected to such treatment.

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

Furthermore, regarding the above-mentioned colorant, the difference between the haze value of the solution obtained by diluting the colorant with ethyl acetate 10,000 times at a wavelength of 780nm and the haze value at a wavelength of 380nm is preferably 30 points or less, 25 points or less is more preferred, 20 points or less is particularly preferred, 16 points or less is more preferred, and 10 points or less is the best. By using this colorant in an appropriate amount, the obtained adhesive has good reproducibility and uniformity for the above-mentioned optical properties.

In addition, the lower limit of the difference between the above haze values may be 0 points, but from the perspective of being able to easily adjust the above adhesive layer 12 to have appropriate optical properties, 0.1 points or more is preferred, 0.5 points or more is more preferred, 1 point or more is particularly preferred, and 3 points or more is even more preferred.

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

Furthermore, the standard deviation of the haze value of the solution obtained by diluting the above coloring agent with ethyl acetate 10,000 times at each wavelength with an interval of 5nm in the wavelength range of 380nm~780nm (i.e., 380nm, 385nm, 390nm, ..., 775nm, 780nm) is preferably 10 or less, 8 or less is more preferred, 5 or less is particularly preferred, and 2 or less is more preferred. The lower limit of the above standard deviation is 0 as the best, but it is usually preferably 0.1 or more, 0.5 or more is particularly preferred, and 1 or more is more preferred. In this way, the obtained adhesive has good reproducibility and uniformity for the above optical properties.

The content of the colorant (C) in the colored adhesive layer 12 is preferably 0.01 parts by mass or more, more preferably 0.05 parts by mass or more, particularly preferably 0.1 parts by mass or more, and more preferably 0.3 parts by mass or more, relative to 100 parts by mass of the (meth)acrylate polymer (A). 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 above 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 then hardening it with active energy rays, the active energy ray-hardening components (D) are polymerized with each other, and it is inferred that the active energy ray-hardening components (D) after polymerization are linked to the crosslinking structure (three-dimensional network structure) of the (meth)acrylate polymer (A). This adhesive with a high-level structure has excellent anti-scattering properties and particularly excellent durability.

The active energy ray-curable component (D) is not particularly limited as long as it can be cured by irradiation with active energy rays to obtain the above-mentioned effects, and may be any of a monomer, an oligomer, or a polymer, or a mixture thereof. Among them, polyfunctional acrylate monomers having more excellent durability are preferred.

Examples of the multifunctional acrylate monomer include 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, neopentyl glycol adipic acid (meth)acrylate, hydroxytrimethylacetic acid neopentyl glycol di(meth)acrylate, dicyclopentyl di(meth)acrylate, tricyclodecanedimethanol (meth)acrylate, caprolactone-modified dicyclopentenyl di(meth)acrylate, ethylene oxide-modified di(meth)acrylate phosphate, di(acryloyloxyethyl) isocyanurate, allyl di(meth)acrylate cyclohexyl, ethoxylated bisphenol A diacrylate, 9,9-bis[4-(2-acryloyloxyethoxy)benzene] [0043] The 2-functional type of trihydroxymethylpropane tri(meth)acrylate, dipentatriol tri(meth)acrylate, propionic acid-modified dipentatriol tri(meth)acrylate, pentaerythritol tri(meth)acrylate, propylene oxide-modified trihydroxymethylpropane tri(meth)acrylate, tri(acryloxyethyl)isocyanurate, ε-caprolactone-modified tri(2-(meth)acryloxyethyl)isocyanurate, etc.; the 4-functional type of diglycerol tetra(meth)acrylate, pentaerythritol tetra(meth)acrylate, etc.; the 5-functional type of propionic acid-modified dipentatriol penta(meth)acrylate, etc.; the 6-functional type of dipentatriol hexa(meth)acrylate, caprolactone-modified dipentatriol hexa(meth)acrylate, etc. The above materials may be used alone or in combination of two or more. In view of the miscibility with the (meth)acrylate polymer (A) and the dispersibility of the colorant (C), the molecular weight of the multifunctional acrylate monomer is preferably less than 1,000.

Among the above, from the viewpoint of durability of the obtained adhesive, polyfunctional acrylate monomers containing an isocyanurate structure in the molecule such as di(acryloxyethyl)isocyanurate, tri(acryloxyethyl)isocyanurate, ε-caprolactone-modified tri(2-(meth)acryloxyethyl)isocyanurate, or polyfunctional acrylate monomers containing a cyclic structure (especially a cycloalkane structure) in the molecule such as tricyclodecanedimethanol (meth)acrylate are preferred. Polyfunctional acrylate monomers containing a trifunctional group or more and containing a cycloalkane structure in the molecule are preferred. Preferred are polyfunctional acrylate monomers having an isocyanurate structure, or polyfunctional acrylate monomers having a difunctional group or more and containing a polycyclic structure (especially a polycyclic structure of a cycloalkane) in the molecule, particularly preferred are ε-caprolactone-modified tris-(2-(meth)acryloyloxyethyl) isocyanurate or tricyclic decanedimethanol (meth)acrylate, more preferred are ε-caprolactone-modified tris-(2-acryloyloxyethyl) isocyanurate or tricyclic decanedimethanol acrylate, and most preferred is ε-caprolactone-modified tris-(2-acryloyloxyethyl) isocyanurate.

From the viewpoint of making the durability of the adhesive after active energy ray curing more excellent, the lower limit of the content of the active energy ray curable component (D) in the adhesive composition P 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, relative to 100 parts by mass of the (meth)acrylate polymer (A). On the other hand, from the viewpoint of the adhesive force of the adhesive after active energy ray curing, the upper limit of the above content is preferably 20 parts by mass or less, more preferably 15 parts by mass or less, particularly preferably 10 parts by mass or less, and more preferably 6 parts by mass or less.

(1-5) Photopolymerization initiator (E) When ultraviolet rays are used as 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 irradiation amount of the active energy ray can be reduced.

As the photopolymerization initiator (E), for example, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin n-butyl ether, benzoin isobutyl ether, acetophenone, dimethylaminoacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropane-1-one, 1-hydroxycyclohexylphenyl ketone, 2-methyl-1-[4-(methylthio)phenyl]-2-furin-1-one, 4-(2-hydroxyethoxy)phenyl-2-(hydroxy-2-propyl)ketone, diphenyl ketone, p-phenylbenzophenone, 4,4'-diethylamine, Benzyl diphenyl ketone, dichlorophenyl ketone, 2-methyl anthraquinone, 2-ethyl anthraquinone, 2-tert-butyl anthraquinone, 2-amino anthraquinone, 2-methyl-thioxanthone, 2-ethyl thioxanthone, 2-chlorothioxanthone, 2,4-dimethyl thioxanthone, 2,4-diethyl thioxanthone, benzyl dimethyl ketal, acetophenone dimethyl ketal, p-dimethylaminobenzoate, oligo[2-hydroxy-2-methyl-1[4-(1-methylvinyl)phenyl]propanone], 2,4,6-trimethylbenzyl-diphenylphosphine oxide, bis(2,4,6-trimethylbenzyl)-phenylphosphine oxide, etc. The above materials may be used alone or in combination of two or more.

Among the above, a phosphine oxide-based photopolymerization initiator is preferred, which is easily decomposed and can reliably cure the adhesive even when the adhesive contains a UV absorber, when the UV absorber is irradiated through a component containing the UV absorber. Specifically, 2,4,6-trimethylbenzyl-diphenylphosphine oxide, bis(2,4,6-trimethylbenzyl)-phenylphosphine oxide, etc. are preferred.

The lower limit of the content of the photopolymerization initiator (E) in the adhesive composition P is preferably 0.1 parts by mass or more, particularly preferably 1 part by mass or more, and more preferably 5 parts by mass or more, relative to 100 parts by mass of the active energy ray-curable component (D). 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 may be added as needed, such as silane coupling agents, ultraviolet absorbers, rust inhibitors, antistatic agents, thickeners, antioxidants, light stabilizers, softeners, refractive index adjusters, etc. In addition, the additives constituting the adhesive composition P do not include the polymerization solvent and diluent solvent described later.

The adhesive composition P preferably contains the silane coupling agent mentioned above. In this way, 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.

The silane coupling agent is preferably an organic silicon compound having at least one alkoxysilyl group in the molecule, having good miscibility with the (meth)acrylate polymer (A) and having light transparency.

Examples of such silane coupling agents include polymerizable unsaturated group-containing silicon compounds such as vinyltrimethoxysilane, vinyltriethoxysilane, and methacryloxypropyltrimethoxysilane, epoxy structure-containing silicon compounds such as 3-glycidoxypropyltrimethoxysilane and 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-butylpropyltrimethoxysilane, 3-butylpropyltriethoxysilane, and 3-butylpropyldimethoxymethylsilane. Silicon compounds, amino group-containing silicon compounds such as 3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-isocyanatepropyltriethoxysilane, or condensates of at least one of the above and alkyl group-containing silicon compounds such as methyltriethoxysilane, ethyltriethoxysilane, methyltrimethoxysilane, and ethyltrimethoxysilane. The above materials may be used alone or in combination of two or more.

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 more preferably 0.1 parts by mass or more, relative to 100 parts by mass of the (meth)acrylate polymer (A). Furthermore, this 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. By including the above content of the silane coupling agent, the adhesion of the anti-scattering adhesive sheet using the obtained adhesive to the adherend can be improved, and a better anti-scattering property can be exerted.

Furthermore, the adhesive composition P preferably contains an ultraviolet absorber. As the ultraviolet absorber, for example, compounds of benzophenone, benzotriazole, benzoate, benzoxazinone, triazine, phenyl salicylate, cyanoacrylate, nickel complex salt, etc. can be listed. Among them, from the perspective of mutual solubility with the (meth)acrylate polymer (A) and dispersibility with the colorant (C), benzophenone, benzotriazole, or triazine compounds are preferred, and benzophenone compounds are particularly preferred. The above materials can be used alone or in combination of two or more.

When the adhesive composition P contains a UV absorber, the content of the UV absorber is preferably 0.01 parts by mass or more, particularly preferably 0.05 parts by mass or more, and more preferably 0.1 parts by mass or more, relative to 100 parts by mass of the (meth)acrylate polymer (A). 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 UV absorber is contained in the above content, even if there are parts that are easily degraded by UV rays inside the display, the anti-scattering adhesive sheet can exert a UV shielding effect to prevent the parts from being degraded by UV rays.

(2) Preparation of adhesive composition The adhesive composition P can be prepared by preparing a (meth)acrylate polymer (A), mixing the obtained (meth)acrylate polymer (A), a crosslinking agent (B), and a coloring agent (C), and adding an active energy ray-hardening component (D), a photopolymerization initiator (E), an additive, etc. as required.

The (meth)acrylate polymer (A) can be produced by polymerizing a mixture of monomers constituting the polymer using a general free radical polymerization method. The polymerization of the (meth)acrylate polymer (A) can be carried out using a polymerization initiator as required, and preferably by a solution polymerization method. However, the present invention is not limited thereto, and the polymerization can also be carried out without a solvent. Examples of the polymerization solvent include ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, methyl ethyl ketone, and the like, and a combination of two or more thereof can also be used.

Examples of the polymerization initiator include azo compounds and organic peroxides, and two or more thereof may be used in combination. Examples of the azo compounds include 2,2'-azobisisobutyronitrile, 2,2'-azobis(2-methylbutyronitrile), 1,1'-azobis(cyclohexane 1-carbonitrile), 2,2'-azobis(2,4-dimethylvaleronitrile), 2,2'-azobis(2,4-dimethyl-4-methoxyvaleronitrile), dimethyl 2,2'-azobis(2-methylpropionate), 4,4'-azobis(4-cyanovaleric acid), 2,2'-azobis(2-hydroxymethylpropionitrile), and 2,2'-azobis[2-(2-imidazolin-2-yl)propane].

Examples of the organic peroxide include benzoyl peroxide, t-butyl perbenzoate, isopropyl hydroperoxide, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, di(2-ethoxyethyl) peroxydicarbonate, t-butyl peroxyneodecanoate, t-butyl peroxytrimethylacetate, (3,5,5-trimethylhexyl) peroxide, dipropyl peroxide, and diacetyl peroxide.

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

After obtaining the (meth)acrylate polymer (A), a crosslinking agent (B), a coloring agent (C), and a diluting solvent as required, an active energy ray-hardening component (D), a photopolymerization initiator (E), an additive, etc. are added to the solution of the (meth)acrylate polymer (A), and the mixture is fully mixed to obtain an adhesive composition P (coating solution) diluted with a solvent. In addition, if any of the above components is used in a solid form or precipitates after being mixed with other components in an undiluted state, the component may be dissolved or diluted in a diluting solvent alone before being mixed with other components.

Examples of the diluting solvent include aliphatic hydrocarbons such as hexane, heptane, and cyclohexane, aromatic hydrocarbons such as toluene and xylene, halogenated hydrocarbons such as dichloromethane and dichloroethane, alcohols such as methanol, ethanol, propanol, butanol, and 1-methoxy-2-propanol, ketones such as acetone, methyl ethyl ketone, 2-pentanone, isophorone, and cyclohexanone, esters such as ethyl acetate and butyl acetate, and cellosolve solvents such as ethyl cellosolve.

The concentration/viscosity of the coating solution prepared in the above manner is not particularly limited as long as it is within the 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 to 60% by mass. In addition, when obtaining the coating solution, the addition of a diluting solvent is not a necessary condition, as long as the adhesive composition P has a coating viscosity, etc., it is not necessary to add a diluting solvent. 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 the present embodiment is preferably composed of an adhesive obtained by crosslinking the adhesive composition P (coating layer). The crosslinking of the adhesive composition P can be performed by heat treatment. In addition, the heat treatment can also be used as a drying treatment when the diluting solvent or the like is volatilized from the coating layer of the adhesive composition P applied to the 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 room temperature (e.g., 23°C, 50% RH) can be set as needed. If this curing period is required, the adhesive is formed after the curing period, and if 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 well crosslinked through the crosslinking agent (B).

(4) Thickness of the coloring adhesive layer

The thickness of the colored adhesive layer 12 is preferably 5 μm or more, more preferably 10 μm or more, and particularly preferably 20 μm or more as the lower limit. When the lower limit of the thickness of the colored adhesive layer 12 is as described above, it is easy to satisfy the aforementioned optical properties and to exhibit the desired adhesion due to the relationship with the content of the colorant (C).

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, and from the perspective of the pencil hardness of the surface of the substrate 11 side in the anti-scattering adhesive sheet 1, 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, the processability becomes good. Furthermore, it becomes less likely to cause appearance defects caused by pressure marks, etc. Moreover, due to the relationship with the content of the colorant (C), it becomes easy to satisfy the aforementioned optical properties. In addition, the colored adhesive layer 12 can be formed as a single layer, or multiple layers can be stacked to form.

(b) Polyurethane adhesives

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

Polyurethane polyol can be obtained by reacting polyol with polyisocyanate so that the equivalent ratio of isocyanate group to hydroxyl group is less than 1. Polyols are preferably polyester polyols, polyether polyols, etc. Polyether polyols are preferably polypropylene glycol, polyethylene glycol, polytetramethylene glycol, etc.

The average functional group number of each molecule of the polyether polyol is preferably 2.2 or more and 3.4 or less, 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 preferably 350 or more and 6000 or less.

Examples of polyisocyanates constituting polyurethane polyols include aromatic polyisocyanates, aliphatic polyisocyanates, aromatic aliphatic polyisocyanates, alicyclic polyisocyanates, etc. Examples include the above-mentioned trihydroxymethylpropane adducts, biuret forms, urate forms, etc. Examples of aromatic polyisocyanates include 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4' -diphenylmethane diisocyanate, etc.

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 polyisocyanate crosslinking agents, for example, trihydroxymethylpropane adducts, biuret bodies, urate bodies, etc. of the above-mentioned polyisocyanates can be listed. The amount of polyisocyanate crosslinking agent to be formulated relative to polyurethane polyol is preferably such that the equivalent ratio of isocyanate group to hydroxyl group is greater than 0.5 and less than 1.5.

The amount of the colorant (C) in the polyurethane adhesive and the thickness of the colored adhesive layer 12 are the same as those in the aforementioned acrylic adhesive.

(c) Silicone adhesives

The polysilicone adhesive in this embodiment may be a condensation type polysilicone adhesive or an addition reaction type polysilicone adhesive, and the addition reaction type polysilicone adhesive is preferred. The addition reaction type polysilicone adhesive preferably contains an addition reaction type polysilicone resin obtained from 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, a silicone resin, and a catalyst.

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

The amount of the silicone resin to be mixed is preferably 10 to 200 parts by mass, particularly preferably 15 to 100 parts by mass, and more preferably 20 to 80 parts by mass relative to 100 parts by mass of the addition reaction type silicone resin. Since the amount of the silicone resin to be mixed is 10 parts by mass or more, the desired adhesion can be obtained. Furthermore, when the amount of the silicone resin to be mixed is 200 parts by mass or less, good reworkability can be obtained, and even in the event of a bonding error, the display component, especially a high-priced display component, can be reused.

The catalyst is not particularly limited as long as it can cure the addition reaction type polysiloxane (addition reaction of the first polydimethylsiloxane and the second polydimethylsiloxane), but platinum group metal compounds are preferred. The amount of the catalyst to be added is preferably 0.01 to 3 parts by mass, and particularly preferably 0.05 to 2 parts by mass, relative to 100 parts by mass of the addition reaction type polysiloxane.

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

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

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

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

The thickness of the peeling sheet 13 is not particularly limited, but is generally 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, 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 higher and can exert a more excellent anti-scattering property. Furthermore, the upper limit of the gel fraction of the adhesive according to this embodiment is preferably 95% or less, more 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, the adhesive does not become too hard and exhibits good adhesion, thereby being able to exhibit more excellent anti-scattering properties. Here, the measurement method of the gel fraction of the adhesive is 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, more preferably 86 or less, particularly preferably 83 or less, and even 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 turned off, the display can be given a sense of unity with the black frame material and the printed layer, thereby improving the appearance coordination.

On the other hand, from the perspective of improving the design and visibility of the display through appearance coordination, the lower limit value of the lightness L* is preferably 10 or more, more preferably 20 or more, particularly preferably 40 or more, even more preferably 50 or more, and best 60 or more.

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

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

(3) 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/video in the obtained display becomes good. The upper limit of the above total light transmittance is not particularly limited, and is usually below 100%. Considering the relationship with the brightness L* and the black tone improvement in the image/video of the display, it is preferably below 95%, preferably below 85%, particularly preferably below 75%, more preferably below 65%, and best below 55%.

(4) Fog value

The haze value of the colored adhesive layer 12 according to the present embodiment is usually above 0%, preferably above 0.1%, more preferably above 1%, particularly preferably above 3%, and most preferably above 6%. 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 below 60%, more preferably below 40%, particularly preferably below 25%, more preferably below 15%, and most preferably below 10%. 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 and lightness L* of the aforementioned anti-scattering adhesive sheet 1. In addition, the haze values in this manual are measured according to JIS K7136:2000.

The haze value of the colored adhesive layer 12 is usually 0% or more, preferably 0.1% or more, 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 and lightness L* of the aforementioned anti-scattering adhesive sheet 1.

(5) Adhesion

The lower limit of the adhesive force of the anti-scattering adhesive sheet 1 according to the present embodiment to the sodium calcium glass is preferably 0.05N/25mm or more, more preferably 0.1N/25mm or more, 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 adhesive force of the anti-scattering adhesive sheet 1 according to the present embodiment to the sodium calcium glass 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 in the case of bonding errors, display components, especially high-priced display components, can be reused.

Here, the adhesion in this manual is basically the adhesion measured by the 180-degree peeling method according to JIS Z0237:2009, where the measurement sample is 25mm wide and 100mm long, and the measurement sample is attached to the adherend and pressurized at 0.5MPa and 50°C for 20 minutes, then placed at normal pressure, 23°C, 50%RH for 24 hours, and then measured at a peeling speed of 300mm/min to obtain the above adhesion. In addition, in the case of active energy ray-curable adhesives, it is the adhesion of the adhesive layer after being hardened by active energy ray irradiation after being attached to the adherend.

(6) Pencil hardness

According to the present embodiment, the pencil hardness of the surface on the substrate 11 side of the anti-scattering adhesive sheet 1 is preferably F or above, and particularly preferably H or above. Since the anti-scattering adhesive sheet 1 has the above-mentioned pencil hardness, the surface on the substrate 11 side of the anti-scattering adhesive sheet 1 has sufficient hardness. Therefore, when the anti-scattering adhesive sheet 1 is used on the front side of the protective panel, excellent surface protection can be exerted. Furthermore, when the anti-scattering adhesive sheet 1 is used on the back side of the protective panel, excellent impact resistance can be exerted. In addition, the measurement method of the pencil hardness in the present invention is as described in the test example described later.

3. Manufacturing of anti-scattering adhesive sheets

As a manufacturing example of the anti-scattering adhesive sheet 1, the coating solution of the adhesive composition P is coated on the peeling surface of the peeling sheet 13, and a heat treatment is performed to thermally crosslink the adhesive composition P. After forming a coating layer, the coating layer is attached to the substrate 11. At this time, when the substrate 11 has a functional layer on one side, the surface on the side without the functional layer is usually in contact with the coating layer.

When a curing period is required, the coating layer is left to cure for a period of time to form a colored adhesive layer 12, and when a curing period is not required, the coating layer is directly used as the colored adhesive layer 12. In the above manner, the anti-scattering adhesive sheet 1 can be obtained. The conditions for the heat treatment and curing are as described above.

Examples of a coating method for the coating solution of the adhesive composition P include bar coating, knife coating, roll coating, blade coating, die coating, and gravure coating.

[Display] A display according to an embodiment of the present invention includes a protective panel, and the anti-scattering adhesive sheet is provided on one or both surface sides of the protective panel. The anti-scattering adhesive sheet may be directly attached to the protective panel, or may be attached to the protective panel via other layers.

According to the display of this embodiment, as an example of the peripheral member, a frame material or the like may be provided on the peripheral portion, or a frame-shaped printed layer or a printed layer displaying characters or symbols may be formed on a part of a display component constituting the display. Furthermore, both of the above may be provided.

According to the display of this embodiment, since the anti-scattering adhesive sheet having a colored adhesive layer is provided on the protective panel, when closed, it has good appearance coordination with peripheral parts such as the frame material of the display, the frame-shaped printed layer, the printed layer for displaying characters and symbols, etc., and the designability becomes high. Furthermore, even if the protective panel of a mobile display is broken due to reasons such as falling, or a car display is subjected to significant impact due to reasons such as an accident, the anti-scattering adhesive sheet is attached to the protective panel, so that the broken protective panel can be prevented from scattering.

FIG. 2 and FIG. 3 illustrate a specific structure of an example of a display according to this embodiment.

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

As shown in FIG3 , the display device 10B according to the second embodiment includes, from the bottom, a display module 7, a thin film sensor 5 laminated thereon via an adhesive layer 6, an anti-scattering adhesive sheet 1 laminated thereon via an adhesive layer 4 (the peeling sheet 13 has been peeled off), and a protective panel 2 laminated via a colored adhesive layer 12 of the anti-scattering adhesive sheet 1 and having a patterned transparent conductive film 3 attached thereto. That is, in this display device 10B, the anti-scattering adhesive sheet 1 is provided on the back side of the protective 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 disposed on the protective panel 2, but the present invention is not limited thereto, and the transparent conductive film 3 can also be disposed on other parts.

As the above-mentioned display module 7, there can be cited a liquid crystal (LCD) module, a light emitting diode (LED) module, an organic electroluminescent (organic EL) module, electronic paper, etc.

The adhesive layer 6 and the adhesive layer 4 can be formed by a desired adhesive or adhesive sheet, or can be formed by the same adhesive as the colored adhesive layer 12 of the anti-scattering adhesive sheet 1 (but preferably without a colorant). Examples of the desired adhesive include acrylic adhesives, rubber adhesives, silicone adhesives, polyurethane adhesives, polyester adhesives, polyvinyl ether adhesives, etc., among which acrylic adhesives are 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, and examples thereof include polyethylene terephthalate film, polyethylene naphthalate film, polycarbonate film, polymethyl methacrylate film, triacetyl cellulose film, and polypropylene film.

As the transparent conductive film 52, for example, there can be listed metals such as platinum, gold, silver, and copper, oxides such as tin oxide, indium oxide, cadmium oxide, zinc oxide, and zinc dioxide, complex oxides such as tin-doped indium oxide (ITO), zinc oxide-doped indium oxide, fluorine-doped indium oxide, antimony-doped tin oxide, fluorine-doped tin oxide, and aluminum-doped zinc oxide, chalcogenides, titanium hexaboride, titanium nitride, and titanium carbide. Non-oxidizing compounds such as the like are preferably used, among which tin-doped indium oxide (ITO) is preferred.

In addition, the transparent conductive film 52 of the thin film sensor 5 in the display devices 10A and 10B is located on the upper side of the thin film sensor 5 in FIG. 2 and FIG. 3 , but the present invention is not limited thereto and may be located on the lower side of the thin film sensor 5 .

The protection panel 2 is a component used to protect the display module 7 and other internal components of the display 10A, 10B from being affected by external factors, and is preferably composed of other components such as a glass plate, a plastic plate, or a laminate including the former.

The glass plate is not particularly limited, and examples thereof include chemically strengthened glass, alkali-free glass, quartz glass, sodium calcium glass, barium/strontium-containing glass, aluminosilicate glass, lead glass, borosilicate glass, barium borosilicate glass, etc. The thickness of the glass plate is not particularly limited, and is generally 0.1 to 5 mm, preferably 0.2 to 2 mm.

The plastic plate is not particularly limited, and examples thereof include acrylic plates, polycarbonate plates, etc. The thickness of the plastic plate is not particularly limited, and is generally 0.2 to 5 mm, and preferably 0.4 to 3 mm.

In addition, a desired functional layer (hard coating layer, anti-glare layer, etc.) may be provided on one or both surfaces of the 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 the present embodiment preferably do not have an anti-reflection layer. If an anti-reflection layer is provided, the hardness of the surface may be reduced, and the desired appearance coordination may not be obtained.

When manufacturing the display device 10A, the peeling 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), and then the display device 10A can be manufactured by a conventional method using the protective panel 2 with the anti-scattering adhesive sheet 1 attached. Alternatively, the display device 10A can be manufactured by a conventional method (the display device 10A without the anti-scattering adhesive sheet 1 attached), and then the anti-scattering adhesive sheet 1 can be attached to the surface side of the protective panel 2 (the side opposite to the display module 7).

Furthermore, when manufacturing the display device 10B, the peeling 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 arranged on the back side of the protective panel 2. Then, the display device 10B can be manufactured by a conventional method using the protective panel 2 with the anti-scattering adhesive sheet 1 attached.

When the colored adhesive layer 12 is active energy ray-curable, after the anti-scattering adhesive sheet 1 is attached via the colored adhesive layer 12 as described above, the active energy ray is irradiated to the colored adhesive layer 12. In this way, the active energy ray-curable component (C) in the colored adhesive layer 12 is polymerized, so that the colored adhesive layer 12 is cured. In the step of irradiating the colored adhesive layer 12 with active energy ray, the active energy ray can be irradiated through the component, for example, the substrate 11 of the anti-scattering adhesive sheet 1.

The so-called active energy rays refer to electromagnetic waves or charged particle beams with energy quanta, and specifically, they include ultraviolet rays and electron beams. Among active energy rays, ultraviolet rays are particularly preferred because they are easy to process.

Ultraviolet irradiation can be performed using a high-pressure mercury lamp, a fusion H lamp, a xenon lamp, etc., and the ultraviolet irradiation is preferably about 50 to 1000 mW/ ^cm2 , and is also preferably about 100 to 500 mW/ ^cm2 . Furthermore, the light intensity is preferably 50 to 10000 mJ/ ^cm2 , more preferably 200 to 7000 mJ/ ^cm2 , and particularly preferably 500 to 3000 mJ/ ^cm2 . On the other hand, electron beam irradiation can be performed using an electron beam accelerator, etc., and the electron beam irradiation is preferably about 10 to 1000 krad.

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

The display 10A, 10B has an anti-scattering adhesive sheet 1 having a colored adhesive layer 12 attached to the protective panel 2, so when closed, the display has a good appearance coordination with the frame material 8, and the design is improved. 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 recorded for easy understanding of the present invention and are not recorded for limiting the present invention. Therefore, it means that each element disclosed in the above embodiments also includes all design changes and equivalents within the technical scope of the present invention.

For example, the peeling sheet 13 in the anti-scattering adhesive sheet 1 may be omitted. Furthermore, another layer may be stacked on the surface of the substrate 11 that is opposite to the colored adhesive layer 12. Furthermore, another layer may be stacked between the substrate 11 and the colored adhesive layer 12. [Example]

Hereinafter, the present invention will be described in more detail through examples, etc. However, the scope of the present invention is not limited to these examples, etc.

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

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

Here, the formulations of the adhesive composition (values converted as solid content) when the (meth)acrylate polymer (A) is set to 100 parts by mass (values converted as solid content) are shown in Table 1. 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 acid MA: methyl acrylate IBXA: isoborneol acrylate ACMO: N-acryloyl isoflurane [Crosslinking agent (B)] TDI: trihydroxymethylpropane-modified toluene diisocyanate Epoxy resin: 1,3-bis(N,N-diglycidylaminomethyl) Cyclohexane [Coloring agent (C)] C1-C2: Carbon black type black pigment having the properties shown in Table 2 [Active energy radiation curable component (D)] ε-caprolactone modified tris-(2-acryloyloxyethyl) isocyanurate [Photopolymerization initiator (E)] 2,4,6-trimethylbenzyl-diphenylphosphine oxide [Silane coupling agent] 3-glycidoxypropyltrimethoxysilane [Ultraviolet absorber] 2,2-dihydroxy-4-methoxybenzophenone

3. Preparation of adhesive sheet 100 parts by mass (expressed as solid content conversion value, the same applies to other components below) of multifunctional (meth)acrylate (produced by Shin-Nakamura Chemical Industry, product name "NK Ester A-DPH") as a coating solution for forming an anti-glare hard coating layer, 4.3 parts by mass of 1-hydroxycyclohexyl phenyl ketone as a photopolymerization initiator, 11 parts by mass of silica fine particles (produced by Fuji Silysia Chemical Co., Ltd., product name "Silo Hobic 702", average particle size: 4.1μm), 0.01 parts by mass of leveling agent (produced by Toray Dow Corning Co., Ltd.) Corning, product name "SH28"), 8.3 parts by mass of silica nanoparticles (Nissan Chemical Industries, product name "MIBK-ST", average particle size: 10 nm) were mixed and diluted with propylene glycol monomethyl ether to prepare a coating solution with a solid content concentration of 30%.

The coating solution was applied to one side of a polyethylene terephthalate (PET) film (manufactured by Toray Industries, product name "125-U403", thickness: 125 μm) using a mayer bar #10 so that the film thickness after drying was 1.5 μm, and dried at 70°C for 1 minute. Then, ultraviolet irradiation was performed using a high-pressure mercury lamp in a nitrogen atmosphere at an illuminance of 200 mW/cm2 and a light quantity of 300 mJ/ ^cm2 to form a PET film (tensile elastic modulus: 5.0 GPa, haze value: 4.0%) with an anti-glare hard coating layer (AG-HC layer).

The coating solution of the adhesive composition obtained in the above step 2 was applied to the peeling-treated surface of a peeling sheet (manufactured by Lintec, product name "SP-PET752150") obtained by peeling one side of a polyethylene terephthalate film with a silicone peeling agent using a doctor blade coater. Then, a 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 prepare an anti-scattering adhesive sheet having a structure of PET film with an AG-HC layer/colored adhesive layer (thickness: 25 μm)/peeling sheet.

The thickness of the 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 to 9, Comparative Examples 1 to 3] Anti-scattering adhesive sheets were produced in the same manner as in Example 1, except that 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), the type and amount of the crosslinking agent (B), the type and amount of the coloring agent (C), the amount of the active energy radiation curable component (D), the amount of the photopolymerization initiator (E), the amount of the silane coupling agent, the amount of the ultraviolet absorber, and the thickness of the adhesive layer were changed to those shown in Table 1. In addition, in Comparative Examples 1 to 3, an uncolored adhesive layer was formed. Furthermore, in Example 8, an active energy ray-hardening colored adhesive layer was formed, whereas in Comparative Example 2, an active energy ray-hardening adhesive layer was formed.

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

[Comparative Example 4] Except for not mixing the coloring agent (C), a coating solution was prepared in the same manner as in Example 10, and an anti-scattering adhesive sheet (having an adhesive layer composed of a silicone adhesive) was manufactured in the same manner as in Example 10 using the coating solution.

[Example 11] 100 parts by mass of trifunctional polypropylene glycol (number average molecular weight: 1000), 7 parts by mass of trihydroxymethylpropane adduct of toluene diisocyanate, 0.01 parts by mass of dioctyltin dilaurate, and 43 parts by mass of toluene were prepared and reacted at 100°C for 3 hours. Then, the mixture was cooled until the presence of isocyanate groups could not be confirmed using an infrared spectrophotometer, thereby obtaining a polyurethane polyol solution.

100 parts by mass of the obtained polyurethane polyol, 15 parts by mass of trihydroxymethylpropane adduct of toluene diisocyanate, and 0.5 parts by mass of carbon black-type black pigment (C2) as a colorant (C) are mixed, stirred sufficiently, and diluted with ethyl acetate to obtain a coating solution of a polyurethane adhesive composition. Using the coating solution, an anti-scattering adhesive sheet (having a colored adhesive layer composed of a polyurethane adhesive) is prepared in the same manner as in Example 1. However, the coating layer is formed by heating at 90°C for 1 minute.

[Comparison Example 5]

Except for not preparing the coloring agent (C), the coating solution is prepared in the same manner as in Example 11, and the coating solution is used to manufacture an anti-scattering adhesive sheet (having an adhesive layer composed of a polyurethane adhesive) in the same manner as in Example 11.

The weight average molecular weight (Mw) mentioned above is the weight average molecular weight converted to polystyrene measured by gel permeation chromatography (GPC) under the following conditions (GPC measurement).

<Measurement conditions>

‧GPC measurement device: HLC-8020 manufactured by Tosoh Corporation

‧GPC column (passed in the following order): manufactured by Tosoh Corporation

TSK guard column HXL-H

TSK gel GMHXL (x2)

TSK gel G2000HXL

‧Measurement solvent: tetrahydrofuran

‧Measurement temperature: 40℃

[Test Example 1] (Measurement of total light transmittance)

For the anti-scattering adhesive sheets obtained in the embodiments and comparative examples (the release sheets have been peeled off), the total light transmittance (%) was measured using a haze meter (manufactured by Nippon Denshoku Industries, product name "NDH-5000") in accordance with JIS K7361-1:1997.

Furthermore, in the Examples and Comparative Examples, a peeling sheet was laminated on the coating layer of the adhesive composition instead of the PET film with the AG-HC layer to prepare a measurement sample having a structure of peeling sheet/(colored) adhesive layer (thickness: 25 μm)/peeling sheet. The total light transmittance (%) of the (colored) adhesive layer in the obtained measurement sample was measured in the same manner as above. The respective results are shown in Table 3.

[Test Example 2] (Measurement of haze value) For the anti-scattering adhesive sheets obtained in the examples and comparative examples (after peeling off the release sheet), the haze value (%) was measured using a haze meter (manufactured by Nippon Denshoku Industries, product name "NDH-5000") in accordance with JIS K7136:2000. Furthermore, for the (colored) adhesive layer in the measurement sample prepared in the same manner as in Test Example 1, the haze value (%) was measured in the same manner as 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 embodiment and the comparative example (the peeling sheet has been peeled off), the lightness L*, chromaticity a* and chromaticity b* defined by the CIE1976 L*a*b* colorimetric system were measured in accordance with JIS K7136:2000 using a spectral colorimeter (manufactured by Nippon Denshoku Industries, product name "SQ2000"). Furthermore, for the (colored) adhesive layer in the measurement sample prepared in the same manner as in Test Example 1, the lightness L*, chromaticity a* and chromaticity b* were measured in the same manner as above. The respective results are shown in Table 3.

[Test Example 4] (Measurement of gel fraction) The sample for measurement prepared in the same manner as in Test Example 1 was cut into a size of 80 mm × 80 mm, and its (colored) adhesive layer was wrapped in a polyester mesh (product name: polyester fiber (TETORON) mesh #200). The mass was measured using a precision balance, and the mass of the adhesive alone was calculated by deducting the mass of the polyester mesh itself. The mass at this time was set as M1.

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

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

[Test Example 6] (Measurement of Adhesion) The anti-scattering adhesive sheet obtained in the embodiment and the comparative example was cut into pieces with a width of 25 mm and a length of 100 mm and used as a sample.

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

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

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

<Active energy ray irradiation conditions> ‧High-pressure mercury lamp ‧Illuminance 200mW/cm ² , luminous intensity 2000mJ/cm ² ‧UV illuminance ‧Light meter "UVPF-A1" manufactured by Eye Graphics

[Test Example 7] (Measurement of pencil hardness) The peeling sheet was peeled off from the anti-scattering adhesive sheet obtained in the embodiment and the comparative example, and the exposed (colored) adhesive layer was attached to a sodium calcium glass. Then, the pencil hardness of the substrate surface (anti-glare hard coating surface) of the anti-scattering adhesive sheet was measured using an electric pencil scratch hardness tester (manufactured by Yasuda Seiki Seisakusho, product name "No.553-M1") in accordance with JIS K5600. The results are shown in Table 3.

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

The obtained sample was placed on a black-printed 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: 200 cm), the frame material and the inner part of the frame material (corresponding to the display part of the display) were visually judged to see whether they were harmonious (having a sense of integrity), and the appearance coordination was evaluated according to the following standards. 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 lack of harmony between the frame material and the display part.

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

[Test Example 9] (Evaluation of visibility) On a 15.6-inch monitor with a resolution of 1366x768 (manufactured by Fujitsu, product name "LITEBOOK A574/H"), a white background and black text (font: MS P Gothic) were displayed at 100% at a size of 5pt to 20pt (1pt per unit).

The sample made in the same manner as in Test Example 8 was placed on the above display. Then, at a distance of 50 cm from the display, visually confirm whether the size of the text can be discerned, and evaluate the visibility according to the following standards. The results are shown in Table 3. ◎: 6pt text can be discerned. ○: 6pt text cannot be fully discerned, but 8pt text can be discerned. △: 8pt text cannot be fully discerned, but 15pt text can be discerned. ╳: 15pt text cannot be discerned.

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

The sample made in the same manner as in Test Example 8 was placed on the above-mentioned display. Then, at a distance of 50 cm from the display, the change in the black tone of the text before and after the sample was placed was visually confirmed, and the black tone imparting property was evaluated according to the following criteria. The results are shown in Table 3. ◎: When the sample was placed, the black tone of the text was improved and became easier to see. ○: When the sample was placed, the black tone of the text was improved, but the background was darker and became difficult to see. ╳: The black tone of the text did not change before and after the sample was placed.

[Test Example 11] (Evaluation of anti-scattering property) The peeling sheet of the anti-scattering adhesive sheet obtained in the embodiment and the comparative example was peeled off, and the exposed (colored) adhesive layer was bonded to a sodium calcium glass plate (manufactured by Nippon Sheet Glass Co., Ltd.) with a length of 170 mm × a width of 150 mm × a thickness of 1 mm. Thereafter, the laminate consisting of the above-mentioned glass plate and the anti-scattering adhesive sheet was placed on two platforms with a height of 10 mm set on a table. At this time, the side of the anti-scattering adhesive sheet was configured to face upward (in the opposite direction to the above-mentioned platforms), and the portions from the two ends of the long side direction of the laminate to 10 mm were each placed on the above-mentioned platforms, and the center portion was in a floating state (height of 10 mm). Then, an iron ball (200 g) with a diameter of 31.75 mm was dropped from a height of 30 cm onto the center of the laminate. The state of the laminate after this step was visually observed, and the anti-scattering properties were evaluated according to the following standards. 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 was broken and the glass was scattered.

[Table 2] Types of coloring agents 380nm haze value (%) 780nm haze value (%) Fog value difference (points) Average fog density (%) Standard deviation of fog values 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 Visibility Black tone endowment Anti-scattering Gel fraction (%) Total light transmittance (%) Fog value (%) L* a* b* Adhesion force (N/25mm) Total light transmittance (%) Fog value (%) L* a* b* Image clarity (sum of 5 optical frequency combs) Pencil hardness Embodiment 1 74 70 17.4 84 -0.1 0.8 10 63.7 20.2 84 -0.2 1.1 418 H ○ ◎ ◎ ○ Embodiment 2 69 50 4.0 73 -1.3 -0.3 12 44.4 9.4 72 -1.4 0.1 418 H ◎ ◎ ◎ ○ Embodiment 3 75 26 10.2 55 -1.9 -1.1 12 23.1 18.0 55 -1.9 -0.6 412 H ◎ ○ ○ ○ Embodiment 4 70 50 4.0 72 -1.1 -0.2 12 44.3 9.5 72 -1.3 0.2 415 H ◎ ◎ ◎ ○ Embodiment 5 69 14 24.7 35 -2.3 -1.6 9 8.9 31.2 35 -2.4 -1.4 410 H ◎ ╳ ○ ○ Embodiment 6 70 50 1.1 74 -1 0.3 17 44.9 6.0 73 -1.1 0.6 419 H ◎ ◎ ◎ ○ Embodiment 7 76 50 1.4 73 -1.2 0.4 twenty two 44.5 6.5 73 -1.2 0.4 418 H ◎ ◎ ◎ ○ Embodiment 8 70 67 3.0 82 -1.5 0.8 34 61.0 7.5 82 -1.1 1.2 407 F ○ ◎ ◎ ○ Embodiment 9 53 65 3.1 80 -1.4 0.7 35 60.0 7.5 80 -1.1 1.2 408 F ◎ ◎ ◎ ○ Embodiment 10 - 81 10.0 90 -0.7 0.6 0.2 75.2 15.2 90 -0.7 0.6 400 H ○ ◎ ◎ ○ Embodiment 11 - 80 10.1 90 -0.7 0.6 0.1 74.0 14.9 90 -0.7 0.6 401 H ○ ◎ ◎ ○ Comparison Example 1 75 99 0.3 96 -0.3 0.2 twenty one 89.8 4.7 96 -0.3 0.7 416 H ╳ ◎ ╳ ○ Comparison Example 2 72 99 0.1 96 -0.3 0.2 35 90.1 5.2 96 -0.4 0.8 412 F ╳ ◎ ╳ ○ Comparison Example 3 59 99 0.1 96 -0.3 0.2 36 90.2 5.1 96 -0.4 0.8 413 F ╳ ◎ ╳ ○ Comparison Example 4 - 99 0.2 96 -0.3 0.2 0.2 89.7 5.2 96 -0.4 0.8 413 H ╳ ◎ ╳ ○ Comparison Example 5 - 99 0.2 96 -0.3 0.2 0.1 90.0 5.9 96 -0.4 0.9 404 H ╳ ◎ ╳ ○

As can be seen from Table 3, the sample using the anti-scattering adhesive sheet obtained in the embodiment has excellent appearance coordination with the frame material, and also has excellent text visibility, black tone imparting ability and anti-scattering property. [Industrial Profitability]

The anti-scattering adhesive sheet of the present invention can be suitably used in displays that need to have an appearance that is coordinated with surrounding components when closed, especially in automotive displays.

1: Anti-scattering adhesive sheet 2: Protective 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: Base material 12: Colored adhesive layer 13: Release 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 having a frame material according to an embodiment of the present invention.

1: Anti-scattering adhesive sheet

11: Base material

12: Colored adhesive layer

13: Peeling film

Claims (11)

An anti-scattering adhesive sheet 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, wherein the substrate is a plastic film having a functional layer, the functional layer is a hard coating layer, and the surface of the substrate side has a pencil hardness of F or above. An anti-scattering adhesive sheet 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, wherein the tensile elastic modulus of the substrate is greater than 1.5 GPa and less than 6.5 GPa. For the anti-scattering adhesive sheet as described in claim 1 or 2, the thickness of the substrate is greater than 105μm and less than 200μm. The anti-scattering adhesive sheet as described in claim 1 or 2, wherein the lightness L* defined by the CIE1976 L*a*b* color system is less than 92. The anti-scattering adhesive sheet as described in claim 1 or 2, wherein the sum of the image sharpness of the optical frequency combs of 0.125mm, 0.25mm, 0.5mm, 1.0mm and 2.0mm measured in accordance with JIS K7374:2007 is 400 or more. The anti-scattering adhesive sheet as described in claim 1 or 2, wherein the total light transmittance is greater than 5% and less than 95%. The anti-scattering adhesive sheet as described in claim 1 or 2, wherein the adhesive constituting the aforementioned colored adhesive layer contains a colorant. The anti-scattering adhesive sheet as described in claim 2, wherein the aforementioned substrate is a plastic film having a functional layer. A display including a protective panel, wherein the anti-scattering adhesive sheet as described in claim 1 or 2 is disposed on one or both surface sides of the protective panel. The display as described in claim 9 has a frame material on the periphery. A display as described in claim 9, wherein a printed layer is formed on a portion of a display component constituting the aforementioned display.