Shatterproof adhesive sheets and displays

Abstract

To provide a splash prevention adhesive sheet capable of improving designability of a display body, and a display body with improved designability.SOLUTION: A splash prevention adhesive sheet 1 provided on at least one surface side of a protective panel 2 used on the display body, comprising a base material 11 and a colored adhesive layer 12, where an adhesive agent constituting the colored adhesive layer 12 contains a coloring agent, and the average haze value, which is the average of the haze values at a wavelength of 780 nm and at a wavelength of 380 nm of a solution diluted 10,000 times with ethyl acetate, is 1% or more and 20% or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a shatterproof adhesive sheet provided on at least one surface of a protective panel used in a display, and to a display provided with the shatterproof adhesive sheet. [Background technology]

[0002] In recent years, liquid crystal display devices and organic electroluminescence display devices have been increasingly used in displays (displays), such as in-vehicle displays in automobile instrument panels, car navigation systems, various instruments mounted on consoles, displays such as tablet terminals for general users, displays such as commercial tablet terminals and digital signage, and displays such as outdoor digital signage.

[0003] As described above, in displays such as those mounted on vehicles, it is sometimes required to improve the design by creating a sense of unity with the surrounding components of the display, such as the frame material, when the display is turned off. To achieve this, it is conceivable to color the display, and for example, Patent Documents 1 to 4 disclose inventions relating to coloring of display bodies. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-313871 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-188298 [Patent Document 3] Japanese Patent Application Laid-Open No. 2012-234028 [Patent Document 4] Japanese Patent Application Laid-Open No. 2017-57375 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the techniques disclosed in the above Patent Documents 1 to 4 all have different purposes for coloring, and therefore have not been able to give the display body a sense of unity with the surrounding components and improve the design.

[0006] On the other hand, there is a problem that the protective panel may break and fragments may fly when a display for mobile use receives a large impact due to a fall, etc., or when a display for vehicle use receives a large impact due to an accident, etc. For this reason, it has been proposed to attach a shatterproof adhesive sheet to the protective panel to prevent the shattered protective panel from flying away.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a shatterproof adhesive sheet that can improve the design of a display, and a display with improved design. [Means for solving the problem]

[0008] In order to achieve the above object, first, the present invention provides a shatterproof adhesive sheet to be provided on at least one side of a protective panel used in a display, characterized in that it comprises a substrate and a colored adhesive layer (Invention 1).

[0009] The shatterproof adhesive sheet according to the above invention (Invention 1) has a colored adhesive layer, and by providing the shatterproof adhesive sheet on at least one side of a protective panel, the resulting display can, for example, have a good appearance harmony with surrounding components such as the frame material of the display, a frame-shaped printed layer, a printed layer showing letters and symbols, etc. when the light is off, thereby improving the design. Furthermore, even if the protective panel is broken due to an impact or the like, the shattered protective panel is prevented from scattering because the shatterproof adhesive sheet is attached to the protective panel.

[0010] In the above invention (invention 1), it is preferable that the lightness L* defined by the CIE1976 L*a*b* color system is 92 or less (invention 2).

[0011] In the above inventions (Inventions 1 and 2), it is preferable that the total value of image clarity of optical combs of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm and 2.0 mm measured in accordance with JIS K7374:2007 is 400 or more (Invention 3).

[0012] In the above inventions (Inventions 1 to 3), the total light transmittance is preferably 5% or more and 95% or less (Invention 4).

[0013] In the above inventions (Inventions 1 to 4), the adhesive constituting the colored adhesive layer preferably contains a colorant (Invention 5).

[0014] In the above inventions (Inventions 1 to 5), the substrate is preferably a plastic film having a functional layer (Invention 6).

[0015] Secondly, the present invention provides a display having a protective panel, characterized in that the shatterproof adhesive sheet (Inventions 1 to 6) is provided on one or both sides of the protective panel (Invention 7).

[0016] In the above invention (invention 7), it is preferable that a frame material is provided on the periphery (invention 8).

[0017] In the above inventions (Inventions 7 and 8), it is preferable that a print layer is formed on a part of one of the display member components that constitutes the display (Invention 9). [Effects of the Invention]

[0018] The shatterproof adhesive sheet according to the present invention can improve the design of the display body. Furthermore, the design of the display body according to the present invention is improved by the shatterproof adhesive sheet. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a cross-sectional view of a shatterproof adhesive sheet according to one embodiment of the present invention. [Figure 2]1 is a cross-sectional view of a display according to an embodiment of the present invention. [Figure 3] FIG. 10 is a cross-sectional view of a display according to another embodiment of the present invention. [Figure 4] 1 is a plan view of a display having a frame material according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, an embodiment of the present invention will be described. [Shatterproof adhesive sheet] The shatterproof adhesive sheet according to one embodiment of the present invention is provided on at least one side of a protective panel used in a display, and includes a substrate and a colored adhesive layer. Details of the display and the protective panel will be described later.

[0021] Because the shatterproof adhesive sheet according to this embodiment has a colored adhesive layer as described above, by providing the shatterproof adhesive sheet on at least one side of the protective panel, the resulting display can, for example, have a good appearance harmony with surrounding components such as the frame material of the display, a frame-shaped printed layer, a printed layer showing letters and symbols, etc. when the light is off, thereby improving the design. Furthermore, even if the protective panel is broken due to an impact or the like, the shattered protective panel is prevented from flying apart because the shatterproof adhesive sheet is attached to the protective panel.

[0022] The lightness L* of the shatterproof pressure-sensitive adhesive sheet as defined by the CIE 1976 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. This allows the display to have a sense of unity with the black frame material and printed layer when the display is turned off, thereby improving the harmony of the appearance.

[0023] On the other hand, from the viewpoint of improving the design by achieving harmony in appearance and the visibility of the display, the lower limit of the lightness L* is preferably 10 or more, more preferably 20 or more, particularly preferably 40 or more, further preferably 50 or more, and most preferably 60 or more. In this specification, the lightness L* and chromaticity a* and b* defined by the CIE 1976 L*a*b* color system are measured by the methods shown in the test examples described later.

[0024] The shatterproof pressure-sensitive adhesive sheet preferably has a chromaticity a* defined by the CIE 1976 L*a*b* color system of -20 to 20, more preferably -10 to 10, particularly preferably -5 to 5, even more preferably -2 to 2, and most preferably -1.5 to 1.5. Having a chromaticity a* within the above range improves the visibility of the display and further improves the design, particularly the appearance harmony of an in-vehicle display.

[0025] Furthermore, the chromaticity b* of the shatterproof pressure-sensitive adhesive sheet, as defined by the CIE 1976 L*a*b* color system, is preferably -20 to 20, more preferably -10 to 10, particularly preferably -5 to 5, even more preferably -2 to 2, and most preferably -1.2 to 1.2. Having a chromaticity b* within the above range improves the visibility of the display and further improves the design, particularly the appearance harmony of an in-vehicle display.

[0026] The shatterproof adhesive sheet (excluding the release sheet) according to this embodiment preferably has a total image clarity (%) of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm optical combs measured in accordance with JIS K7374:2007 of 400 or more, more preferably 405 or more, particularly preferably 410 or more, and even more preferably 415 or more. This improves the visibility of images and videos on the resulting display. In particular, even if the lightness L* is within the aforementioned range, the visibility of images and videos on the display is maintained at a good level.

[0027] On the other hand, the total value of the image clarity (%) is preferably 500 or less, more preferably 450 or less, particularly preferably 430 or less, and even more preferably 420 or less. This makes it easier for the lightness L* to fall within the above-mentioned range while maintaining good visibility of images and videos on the display.

[0028] Here, image clarity is measured by measuring the amount of parallel light rays transmitted through a test specimen using an optical comb having a transmitting portion and a light-shielding portion. The smaller the width (comb width) between the transmitting portion and the light-shielding portion of the optical comb, the higher the image clarity. Image clarity is measured in accordance with the transmission method of JIS K7374:2007. The specific measurement method is as shown in the test examples described below.

[0029] The total light transmittance of the shatterproof pressure-sensitive adhesive sheet (excluding the release sheet) according to this embodiment is preferably 5% or more, more preferably 20% or more, particularly preferably 30% or more, and even more preferably 40% or more. This improves the visibility of images and videos on the resulting display, and in particular prevents the boundary between the black display area and the non-black display area from becoming unclear when the display is turned on. The upper limit of the total light transmittance is not particularly limited, but is usually 100% or less. In consideration of the relationship with the lightness L*, it is preferably 95% or less. In consideration of the ability to impart blackness to the black display area of ​​the display, it is more preferably 85% or less, particularly preferably 75% or less, even more preferably 65% ​​or less, and most preferably 60% or less. The total light transmittance in this specification is a value measured in accordance with JIS K7361-1:1997.

[0030] The degree of coloring (coloring density distribution) of the shatterproof adhesive sheet (colored adhesive layer) according to this embodiment is preferably uniform in the surface direction, which improves the design (particularly the appearance harmony) and visibility of the display.

[0031] A specific configuration of one example of a shatterproof adhesive sheet according to this embodiment is shown in Figure 1. As shown in Figure 1, shatterproof adhesive sheet 1 is composed of substrate 11, colored adhesive layer 12 laminated on one side of substrate 11, and release sheet 13 laminated on the side of colored adhesive layer 12 opposite substrate 11. Colored adhesive layer 12 is in contact with the release surface of release sheet 13. In this specification, the release surface of a release sheet refers to the surface of the release sheet that has releasability, and includes both a surface that has been subjected to a release treatment and a surface that exhibits releasability even without being subjected to a release treatment.

[0032] 1. Each component 1-1. Base material The substrate 11 may be made of any material having sufficient strength to prevent the scattering of broken protective panels (glass or plastic fragments) when the protective panel of the adherend is broken. The substrate 11 is usually mainly made of a plastic film, and may consist of only a plastic film, or may be a plastic film on which a desired functional layer is formed.

[0033] Examples of plastic films 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, and cycloolefin resin films; and laminates of two or more of these. The plastic film may be uniaxially or biaxially stretched.

[0034] Among the above plastic films, so-called optical films are preferred, and specifically, plastic films with a haze value of less than 1% are preferred. When the haze value is less than 1%, the visibility of the resulting display is improved. As such optical films, polyethylene terephthalate, triacetyl cellulose film, polycarbonate film, cycloolefin resin film, etc. are preferred.

[0035] Furthermore, in order to improve adhesion to layers (such as the colored adhesive layer 12 and functional layers) laminated on the surface of the plastic film, one or both sides may be subjected to a surface treatment such as a primer treatment, an oxidation method, or a roughening method, as desired. Examples of oxidation methods include corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, and ozone / ultraviolet treatment, while examples of roughening methods include sandblasting and solvent treatment. These surface treatment methods are appropriately selected depending on the type of plastic film.

[0036] Examples of the functions of the functional layer include hard coating properties, anti-glare properties, fingerprint resistance, easy slippage, anti-static properties, improved writing feel, anti-Newton ring properties, and high transparency. The functional layer may have multiple of these functions. Furthermore, these functions may differ depending on whether the shatterproof adhesive sheet 1 is provided on the front side of the protective panel or on the back side.

[0037] The functional layer is preferably a hard coat layer from the viewpoint of improving shatterproofness, but may also be a hard coat layer having functions other than hard coat properties. For example, when the shatterproof adhesive sheet 1 is provided on the front side of a protective panel, a hard coat layer having fingerprint resistance, anti-glare properties, improved writing feel, easy slippage, high transparency, antistatic properties, etc. is preferred. Furthermore, when the shatterproof adhesive sheet 1 is provided on the back side of a protective panel, a hard coat layer having anti-Newton ring properties, anti-glare properties, high transparency, antistatic properties, etc. is preferred.

[0038] In this embodiment, it is preferable that the substrate 11 does not have an anti-reflection layer. If an anti-reflection layer is provided, the surface hardness may decrease, and the desired harmony in appearance may not be obtained.

[0039] The hard coat layer is usually formed by curing a coating composition containing an active energy ray-curable compound as an essential component and, if desired, a leveling agent, a filler, a photopolymerization initiator, etc. As the active energy ray-curable compound, a multifunctional (meth)acrylate is preferably used. In this specification, the term "(meth)acrylate" refers to both acrylate and methacrylate. The same applies to other similar terms.

[0040] From the viewpoint of improving shatterproofness, the thickness of the hard coat layer is preferably 0.5 to 20 μm, particularly preferably 1 to 10 μm, and further preferably 1.5 to 5 μm.

[0041] The thickness of the substrate 11 (including a functional layer, if any) is preferably 10 μm or more, more preferably 20 μm or more, particularly preferably 40 μm or more, even more preferably 80 μm or more, and most preferably 105 μm or more, from the viewpoints of shatterproofness and dent prevention. On the other hand, from the viewpoints of processability in roll-to-roll and the like and thinning of the display, the thickness is preferably 200 μm or less, particularly preferably 150 μm or less, and even more preferably 130 μm or less.

[0042] The tensile modulus of the substrate 11 (including the functional layer if it has one) is preferably 1.5 GPa or more, particularly preferably 3.0 GPa or more, and even more preferably 4.0 GPa or more, from the viewpoint of shatterproofness and dent prevention. On the other hand, from the viewpoint of substrate shrinkage, the tensile modulus is preferably 6.5 GPa or less, particularly preferably 6.0 GPa or less.

[0043] 1-2. Colored adhesive layer The type of adhesive constituting the colored adhesive layer 12 of the shatterproof adhesive sheet 1 according to this embodiment is not particularly limited, and may be, for example, an acrylic adhesive, a polyester adhesive, a polyurethane adhesive, a rubber adhesive, a silicone adhesive, or the like. The adhesive may be an emulsion type, a solvent type, or a solventless type, and may be a crosslinked type or a non-crosslinked type. Among these, acrylic adhesives, polyurethane adhesives, or silicone adhesives, which have excellent adhesive properties and optical characteristics, are preferred, with acrylic adhesives being particularly preferred.

[0044] (a) Acrylic adhesive The acrylic adhesive may be either active energy ray-curable or non-active energy ray-curable, and is preferably a crosslinkable acrylic adhesive, more preferably a thermally crosslinkable acrylic adhesive.

[0045] Specifically, the acrylic adhesive in this embodiment is preferably one obtained by crosslinking an adhesive composition (hereinafter sometimes referred to as "adhesive composition P") containing a (meth)acrylic acid ester polymer (A), a crosslinking agent (B), and a colorant (C). In addition, when the adhesive is an active energy ray-curable adhesive, it is preferable that the adhesive composition P further contains an active energy ray-curable component (D).

[0046] The pressure-sensitive adhesive obtained from such a pressure-sensitive adhesive composition P can exhibit excellent optical properties, adhesive strength, shatterproof properties, etc. In this specification, (meth)acrylic acid means both acrylic acid and methacrylic acid. The same applies to other similar terms. Furthermore, the term "polymer" also includes the concept of "copolymer."

[0047] (1) Components of the adhesive composition (1-1) (Meth)acrylic acid ester polymer (A) The (meth)acrylic acid ester polymer (A) in this embodiment preferably contains, as a monomer unit constituting the polymer, a reactive group-containing monomer having in the molecule a reactive group that reacts with the crosslinking agent (B). The reactive group derived from this reactive group-containing monomer reacts with the crosslinking agent (B) to form a crosslinked structure (three-dimensional network structure), thereby obtaining a pressure-sensitive adhesive having the desired cohesive strength.

[0048] Preferred examples of the reactive group-containing monomer include a monomer having a hydroxyl group in the molecule (hydroxyl group-containing monomer), a monomer having a carboxyl group in the molecule (carboxyl group-containing monomer), a monomer having an amino group in the molecule (amino group-containing monomer), etc. Among these, a hydroxyl group-containing monomer or a carboxyl group-containing monomer, which has excellent reactivity with the crosslinking agent (B), is preferred, and a hydroxyl group-containing monomer and a carboxyl group-containing monomer may be used in combination.

[0049] Examples of hydroxyl group-containing monomers include (meth)acrylic acid hydroxyalkyl esters 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 these, from the viewpoints of the reactivity of the hydroxyl group in the resulting (meth)acrylic acid ester polymer (A) with the crosslinking agent (B), copolymerizability with other monomers, and good dispersibility with the colorant (C), preferred are (meth)acrylic acid hydroxyalkyl esters having a hydroxyalkyl group having 1 to 4 carbon atoms. Specific examples include 2-hydroxyethyl (meth)acrylate and 4-hydroxybutyl (meth)acrylate, with 2-hydroxyethyl acrylate and 4-hydroxybutyl acrylate being particularly preferred. These may be used alone or in combination of two or more.

[0050] Examples of carboxyl group-containing monomers include ethylenically unsaturated carboxylic acids such as acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, and citraconic acid. Among these, acrylic acid is preferred in terms of the reactivity of the carboxyl group in the resulting (meth)acrylic acid ester polymer (A) with the crosslinking agent (B) and copolymerizability with other monomers. These may be used alone or in combination of two or more.

[0051] Examples of the amino group-containing monomer include aminoethyl (meth)acrylate, n-butylaminoethyl (meth)acrylate, etc. These may be used alone or in combination of two or more.

[0052] The (meth)acrylic acid ester polymer (A) preferably contains a reactive group-containing monomer as a monomer unit constituting the polymer in an amount of at least 1% by mass, particularly at least 3% by mass, and even more preferably at least 10% by mass. When the reactive group-containing monomer is a hydroxyl group-containing monomer, the amount is preferably at least 15% by mass, and even more preferably at least 20% by mass. Furthermore, the (meth)acrylic acid ester polymer (A) preferably contains a reactive group-containing monomer as a monomer unit constituting the polymer in an amount of at most 35% by mass, particularly at most 30% by mass, and even more preferably at most 25% by mass. When the (meth)acrylic acid ester polymer (A) contains the reactive group-containing monomer as a monomer unit in the above-mentioned amount, a favorable crosslinked structure is formed in the resulting pressure-sensitive adhesive, resulting in desired cohesive strength and adhesive properties. This allows the resulting pressure-sensitive adhesive to, for example, cushion impact and prevent cracking of the protective panel, as well as prevent the protective panel from scattering fragments even if it is broken. Furthermore, since the adhesive strength is excellent with the substrate constituting the shatterproof adhesive sheet, even if the fragments penetrate the adhesive layer and reach the substrate side, the shatterproof adhesive sheet itself can be prevented from tearing. Furthermore, the dispersibility of the colorant (C) in the adhesive tends to be good, and the resulting adhesive has good reproducibility and uniformity of the optical properties described above, and can impart better design and visibility.

[0053] It is also preferable that the (meth)acrylic acid ester polymer (A) does not contain a carboxyl group-containing monomer as a monomer unit constituting the polymer. Because a carboxyl group is an acid component, the absence of a carboxyl group-containing monomer can prevent acid-induced defects (corrosion, resistance change, etc.) even when the target to which the pressure-sensitive adhesive is applied contains a material that may be affected by acid, such as a transparent conductive film such as tin-doped indium oxide (ITO) or a metal film. However, it is acceptable to contain a predetermined amount of a carboxyl group-containing monomer to the extent that such defects do not occur. Specifically, it is acceptable for the (meth)acrylic acid ester polymer (A) to contain, as a monomer unit, a carboxyl group-containing monomer in an amount of 0.1% by mass or less, preferably 0.01% by mass or less, and more preferably 0.001% by mass or less.

[0054] The (meth)acrylic acid ester polymer (A) preferably contains a (meth)acrylic acid alkyl ester as a monomer unit constituting the polymer. This allows the polymer to exhibit good adhesiveness. The alkyl group may be linear or branched.

[0055] From the viewpoint of adhesiveness, the (meth)acrylic acid alkyl ester is preferably a (meth)acrylic acid alkyl ester in which the alkyl group has 1 to 20 carbon atoms. Examples of the (meth)acrylic acid alkyl ester in which the alkyl group has 1 to 20 carbon atoms 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 these, from the viewpoint of further improving adhesiveness, (meth)acrylic acid esters having an alkyl group carbon number of 1 to 8 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 even more preferred. These may be used alone or in combination of two or more.

[0056] The (meth)acrylic acid ester polymer (A) preferably contains 45% by mass or more, particularly 55% by mass or more, and even more preferably 65% ​​by mass or more, of (meth)acrylic acid alkyl ester as a monomer unit constituting the polymer. When the lower limit of the (meth)acrylic acid alkyl ester content is as described above, the (meth)acrylic acid ester polymer (A) can exhibit suitable adhesive properties. Furthermore, the colorant (C) tends to disperse well in the adhesive, and the (meth)acrylic acid ester polymer (A) does not lose its desired adhesive properties. This allows the resulting adhesive to exhibit suitable adhesive properties and to have good reproducibility and uniformity of the optical properties described above, thereby providing better design and visibility.

[0057] On the other hand, the (meth)acrylic acid ester polymer (A) preferably contains 99% by mass or less, particularly preferably 95% by mass or less, and even more preferably 90% by mass or less, of (meth)acrylic acid alkyl ester as a monomer unit constituting the polymer. Furthermore, when a hydroxyl group-containing monomer is included as a monomer constituting the polymer, the (meth)acrylic acid alkyl ester is more preferably contained in 85% by mass or less, particularly preferably 80% by mass or less, of the monomer unit constituting the polymer. When the upper limit of the (meth)acrylic acid alkyl ester content is as described above, it is possible to introduce suitable amounts of other monomer components, such as reactive functional group-containing monomers, into the (meth)acrylic acid ester polymer (A).

[0058] The (meth)acrylic acid ester polymer (A) preferably contains a monomer having an alicyclic structure in the molecule (alicyclic structure-containing monomer) as a monomer unit constituting the polymer. Because the alicyclic structure-containing monomer is bulky, its presence in the polymer is presumed to increase the spacing between polymer molecules, thereby making the resulting pressure-sensitive adhesive excellent in flexibility. This makes the pressure-sensitive adhesive itself excellent in shatter resistance.

[0059] The carbon ring of the alicyclic structure in the alicyclic structure-containing monomer may be a saturated structure or may partially contain an unsaturated bond. The alicyclic structure may be a monocyclic alicyclic structure or a polycyclic alicyclic structure such as a bicyclic or tricyclic structure. From the viewpoint of optimizing the distance between the rings in the resulting (meth)acrylic acid ester polymer (A) and imparting high stress relaxation properties to the adhesive, the alicyclic structure is preferably a polycyclic alicyclic structure (a polycyclic structure). Furthermore, in consideration of the compatibility of the (meth)acrylic acid ester polymer (A) with other components, the polycyclic structure is particularly preferably a bicyclic to tetracyclic structure. Similarly, from the viewpoint of imparting stress relaxation properties, the number of carbon atoms in the alicyclic structure (meaning the total number of carbon atoms in the ring, or the total number of carbon atoms in the case of multiple independent rings) is preferably 5 or more, and particularly preferably 7 or more. On the other hand, there is no particular upper limit on the number of carbon atoms in the alicyclic structure, but from the viewpoint of compatibility as described above, it is preferably 15 or less, and particularly preferably 10 or less.

[0060] Specific examples of the alicyclic structure-containing monomer include cyclohexyl (meth)acrylate, dicyclopentanyl (meth)acrylate, adamantyl (meth)acrylate, isobornyl (meth)acrylate, dicyclopentenyl (meth)acrylate, and dicyclopentenyloxyethyl (meth)acrylate. Among these, dicyclopentanyl (meth)acrylate (alicyclic structure carbon number: 10), adamantyl (meth)acrylate (alicyclic structure carbon number: 10), or isobornyl (meth)acrylate (alicyclic structure carbon number: 7) are preferred, as they exhibit superior shatterproof properties. Isobornyl (meth)acrylate is particularly preferred, and isobornyl acrylate is even more preferred. These may be used alone or in combination of two or more.

[0061] When the (meth)acrylic acid ester polymer (A) contains an alicyclic structure-containing monomer as a monomer unit constituting the polymer, it preferably contains the alicyclic structure-containing monomer in an amount of 1% by mass or more, particularly preferably 4% by mass or more, and even more preferably 8% by mass or more. Furthermore, the (meth)acrylic acid ester polymer (A) preferably contains the alicyclic structure-containing monomer as a monomer unit constituting the polymer in an amount of 30% by mass or less, particularly preferably 22% by mass or less, and even more preferably 14% by mass or less. By having the alicyclic structure-containing monomer content within the above range, the resulting pressure-sensitive adhesive has better shatter resistance and better adhesive strength to plastics.

[0062] The (meth)acrylic acid ester polymer (A) also preferably contains a nitrogen-atom-containing monomer as a monomer unit constituting the polymer. The presence of a nitrogen-atom-containing monomer as a constituent unit in the polymer imparts a predetermined polarity to the PSA, making it possible to provide excellent affinity for adherends with a certain degree of polarity, such as glass. The nitrogen-atom-containing monomer is preferably a monomer having a nitrogen-containing heterocycle, from the viewpoint of providing the (meth)acrylic acid ester polymer (A) with appropriate rigidity. Furthermore, from the viewpoint of increasing the degree of freedom of the portion derived from the nitrogen-atom-containing monomer in the higher-order structure of the PSA formed, it is preferable that the nitrogen-atom-containing monomer does not contain a reactive unsaturated double bond group other than the one polymerizable group used in polymerization to form the (meth)acrylic acid ester polymer (A).

[0063] Examples of monomers having a nitrogen-containing heterocycle include N-(meth)acryloylmorpholine, N-vinyl-2-pyrrolidone, N-(meth)acryloylpyrrolidone, N-(meth)acryloylpiperidine, N-(meth)acryloylpyrrolidine, N-(meth)acryloylaziridine, aziridinylethyl (meth)acrylate, 2-vinylpyridine, 4-vinylpyridine, 2-vinylpyrazine, 1-vinylimidazole, N-vinylcarbazole, and N-vinylphthalimide. Among these, N-(meth)acryloylmorpholine, which exhibits superior adhesive strength, is preferred, and N-acryloylmorpholine is particularly preferred. These may be used alone or in combination of two or more.

[0064] When the (meth)acrylic acid ester polymer (A) contains a nitrogen-containing monomer as a monomer unit constituting the polymer, it preferably contains 1% by mass or more of the nitrogen-containing monomer, particularly preferably 4% by mass or more, and even more preferably 8% by mass or more. Furthermore, the (meth)acrylic acid ester polymer (A) preferably contains 20% by mass or less of the nitrogen-containing monomer as a monomer unit constituting the polymer, particularly preferably 16% by mass or less, and even more preferably 12% by mass or less. When the nitrogen-containing monomer content is within the above range, the resulting pressure-sensitive adhesive has better shatterproof properties and can fully exhibit excellent adhesive strength to glass.

[0065] The (meth)acrylic acid ester polymer (A) may contain other monomers as monomer units constituting the polymer, if desired. The other monomers are preferably monomers that do not contain reactive functional groups, so as not to inhibit the aforementioned action of the reactive functional group-containing monomer. Examples of such monomers include (meth)acrylic acid alkoxyalkyl esters such as methoxyethyl (meth)acrylate and ethoxyethyl (meth)acrylate, vinyl acetate, and styrene. These may be used alone or in combination of two or more.

[0066] The (meth)acrylic acid ester polymer (A) is preferably a linear polymer, which facilitates entanglement of molecular chains and is expected to improve cohesive strength, making it easier to obtain a pressure-sensitive adhesive with excellent shatterproof properties.

[0067] The (meth)acrylic acid ester polymer (A) is preferably a solution polymer obtained by solution polymerization. By using a solution polymer, a high molecular weight polymer can be easily obtained, and an improved cohesive force can be expected, so that a pressure-sensitive adhesive with excellent shatter resistance can be easily obtained.

[0068] The polymerization mode of the (meth)acrylic acid ester polymer (A) may be a random copolymer or a block copolymer.

[0069] The weight-average molecular weight of the (meth)acrylic acid ester polymer (A) preferably has a lower limit of 200,000 or more, more preferably 300,000 or more, and particularly preferably 400,000 or more. From the viewpoint of dispersibility of the colorant (C), it is even more preferable that it be 450,000 or more. When the lower limit of the weight-average molecular weight of the (meth)acrylic acid ester polymer (A) is within the above range, the resulting pressure-sensitive adhesive has better shatter resistance. In addition, the dispersibility of the colorant (C) in the pressure-sensitive adhesive tends to be improved. Therefore, the resulting pressure-sensitive adhesive has good reproducibility and uniformity of the optical properties described above, and can be endowed with better design and visibility.

[0070] The upper limit of the weight-average molecular weight of the (meth)acrylic acid ester polymer (A) is preferably 2,000,000 or less, particularly preferably 1,500,000 or less, and even more preferably 1,000,000 or less. When the upper limit of the weight-average molecular weight of the (meth)acrylic acid ester polymer (A) is within the above range, the resulting pressure-sensitive adhesive has better shatterproof properties. Note that the weight-average molecular weight in this specification is a value measured by gel permeation chromatography (GPC) in terms of standard polystyrene.

[0071] In the pressure-sensitive adhesive composition P, the (meth)acrylic acid ester polymer (A) may be used singly or in combination of two or more kinds.

[0072] (1-2) Crosslinking agent (B) The crosslinking agent (B) crosslinks the (meth)acrylic acid ester polymer (A) by heating the pressure-sensitive adhesive composition P, thereby enabling the formation of a favorable three-dimensional network structure, which improves the cohesive strength of the resulting pressure-sensitive adhesive and provides it with excellent shatterproof properties.

[0073] The crosslinking agent (B) may be any agent that reacts with the reactive groups of the (meth)acrylic acid ester polymer (A). Examples of the crosslinking agent (B) include isocyanate-based crosslinking agents, epoxy-based crosslinking agents, amine-based crosslinking agents, melamine-based crosslinking agents, aziridine-based crosslinking agents, hydrazine-based crosslinking agents, aldehyde-based crosslinking agents, oxazoline-based crosslinking agents, metal alkoxide-based crosslinking agents, metal chelate-based crosslinking agents, metal salt-based crosslinking agents, and ammonium salt-based crosslinking agents. Among these, when the reactive group of the (meth)acrylic acid ester polymer (A) is a hydroxyl group, it is preferable to use an isocyanate-based crosslinking agent that has excellent reactivity with the hydroxyl group. When the reactive group of the (meth)acrylic acid ester polymer (A) is a carboxyl group, it is preferable to use an epoxy-based crosslinking agent that has excellent reactivity with the carboxyl group. The crosslinking agent (B) may be used alone or in combination of two or more.

[0074] The isocyanate-based crosslinking agent contains at least a polyisocyanate compound. Examples of polyisocyanate compounds include aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate; aliphatic polyisocyanates such as hexamethylene diisocyanate; alicyclic polyisocyanates such as isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate; and biuret and isocyanurate forms thereof, as well as adducts thereof that are reaction products with low-molecular-weight active hydrogen-containing compounds such as ethylene glycol, propylene glycol, neopentyl glycol, trimethylolpropane, and castor oil. Among these, trimethylolpropane-modified aromatic polyisocyanates, particularly trimethylolpropane-modified tolylene diisocyanate or trimethylolpropane-modified xylylene diisocyanate, are preferred from the viewpoint of reactivity with hydroxyl groups.

[0075] 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, trimethylolpropane diglycidyl ether, diglycidylaniline, diglycidylamine, etc. Among these, 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane is preferred from the viewpoint of reactivity with carboxy groups.

[0076] The content of the crosslinking agent (B) in the pressure-sensitive adhesive composition P is preferably 0.01 parts by mass or more, particularly preferably 0.03 parts by mass or more, and even more preferably 0.05 parts by mass or more, per 100 parts by mass of the (meth)acrylic acid ester polymer (A). 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 even more preferably 0.4 parts by mass or less. By having the content of the crosslinking agent (B) within the above range, the resulting pressure-sensitive adhesive exhibits good cohesion and exhibits excellent shatterproof properties.

[0077] (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. From the viewpoint of the durability of the resulting adhesive, inorganic pigments are preferred. The color of the colorant can be appropriately selected in consideration of the design of the display, particularly the harmony of the appearance, and is generally preferably a dark or deep color such as black, brown, navy blue, purple, or blue, with black being particularly preferred.

[0078] Examples of inorganic pigments include carbon black, cobalt-based pigments, iron-based pigments, chromium-based pigments, titanium-based pigments, vanadium-based pigments, zirconium-based pigments, molybdenum-based pigments, ruthenium-based pigments, platinum-based pigments, ITO (indium tin oxide)-based pigments, and ATO (antimony tin oxide)-based pigments.

[0079] Examples of organic pigments and organic dyes include aminium-based dyes, cyanine-based dyes, merocyanine-based dyes, croconium-based dyes, squarium-based dyes, azulenium-based dyes, polymethine-based dyes, naphthoquinone-based dyes, pyrylium-based dyes, phthalocyanine-based dyes, naphthalocyanine-based dyes, naphtholactam-based dyes, azo-based dyes, condensed azo-based dyes, indigo-based dyes, perinone-based dyes, perylene-based dyes, dioxazine-based dyes, quinacridone-based dyes, isoindolinone-based dyes, quinophthalone-based dyes, pyrrole-based dyes, thioindigo-based dyes, metal complex-based dyes (metal complex dyes), dithiol metal complex-based dyes, indolephenol-based dyes, triallylmethane-based dyes, anthraquinone-based dyes, dioxazine-based dyes, naphthol-based dyes, azomethine-based dyes, benzimidazolone-based dyes, pyranthrone-based dyes, and threne-based dyes.

[0080] Examples of black pigments include carbon black, copper oxide, iron oxide, manganese dioxide, aniline black, activated carbon, etc. Examples of black dyes include high-concentration vegetable dyes and azo dyes.

[0081] The above pigments or dyes can be used in appropriate mixtures depending on the purpose.

[0082] From the viewpoint of the aforementioned lightness L* (and chromaticity a* and b*), carbon black, nigrosine-based black dyes, and chromate-based black dyes are preferred among the above colorants. The carbon black may or may not have been subjected to a predetermined surface treatment (for example, a solvent-improving treatment).

[0083] The colorant preferably has a lower limit of average haze, which is the average of the haze values ​​at a wavelength of 780 nm and 380 nm when the colorant is diluted 10,000 times with ethyl acetate, of 1%, particularly preferably 2% or more, and even more preferably 3% or more. Furthermore, the colorant preferably has an upper limit of average haze of 60% or less, preferably 40% or less, particularly preferably 30% or less, even more preferably 20% or less, and most preferably 10% or less. By using an appropriate amount of such a colorant, the resulting adhesive exhibits good reproducibility and uniformity of the optical properties described above.

[0084] Furthermore, the colorant is preferably one in which the difference between the haze value at a wavelength of 780 nm and the haze value at a wavelength of 380 nm of a solution obtained by diluting the colorant 10,000 times with ethyl acetate is 30 points or less, more preferably 25 points or less, particularly preferably 20 points or less, even more preferably 16 points or less, and most preferably 10 points or less. By using an appropriate amount of such a colorant, the resulting pressure-sensitive adhesive exhibits good reproducibility and uniformity of the optical properties described above.

[0085] The lower limit of the difference in haze value may be 0 points, but from the viewpoint of making it easier to adjust the optical properties of the pressure-sensitive adhesive layer 11 to be suitable, it is preferably 0.1 points or more, more preferably 0.5 points or more, particularly preferably 1 point or more, and even more preferably 3 points or more.

[0086] The haze value at a wavelength of 780 nm of a solution obtained by diluting the above colorant 10,000 times with ethyl acetate is preferably 0.1 to 50%, more preferably 0.5 to 40%, particularly preferably 1 to 30%, even more preferably 1.5 to 20%, and most preferably 2 to 10%. Furthermore, the haze value at a wavelength of 380 nm of a solution obtained by diluting the above colorant 10,000 times with ethyl acetate is preferably 1 to 60%, more preferably 3 to 50%, particularly preferably 6 to 40%, even more preferably 8 to 30%, and most preferably 10 to 20%. This makes it easier to meet the above-mentioned haze value difference.

[0087] Furthermore, the standard deviation of the haze value at each wavelength in 5 nm increments in the wavelength range of 380 nm to 780 nm (i.e., 380 nm, 385 nm, 390 nm, 775 nm, 780 nm) of a solution obtained by diluting the above colorant 10,000 times with ethyl acetate is preferably 10 or less, more preferably 8 or less, particularly preferably 5 or less, and even more preferably 2 or less. The lower limit of the standard deviation is most preferably 0, but is usually preferably 0.1 or more, particularly preferably 0.5 or more, and even more preferably 1 or more. This allows the resulting pressure-sensitive adhesive to have good reproducibility and uniformity of the optical properties described above.

[0088] In the colored adhesive layer 12, the content of the colorant (C) relative to 100 parts by mass of the (meth)acrylic acid ester polymer (A) 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 even more preferably 0.3 parts by mass or more. Furthermore, the content is preferably 2 parts by mass or less, more preferably 1.5 parts by mass or less, particularly preferably 1.2 parts by mass or less, even more preferably 0.9 parts by mass or less, and most preferably 0.6 parts by mass or less. By having the content of the colorant (C) within the above range, the aforementioned optical properties are more likely to be satisfied, and the appearance harmony and visibility of the display body are more likely to be improved.

[0089] (1-4) Active energy ray-curable component (D) In the adhesive obtained by crosslinking the adhesive composition P and then curing it with active energy rays, it is presumed that the active energy ray-curable components (D) polymerize with each other, and the polymerized active energy ray-curable components (D) become entangled in the crosslinked structure (three-dimensional network structure) of the (meth)acrylic acid ester polymer (A). An adhesive having such a high-order structure exhibits excellent shatterproof properties and is particularly excellent in durability.

[0090] The active energy ray-curable component (D) is not particularly limited as long as it is a component that can be cured by irradiation with active energy rays and can provide the above-mentioned effects, and may be any of a monomer, oligomer, or polymer, or a mixture thereof. Among them, polyfunctional acrylate monomers, which are superior in durability, are preferred.

[0091] Examples of polyfunctional acrylate monomers 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 adipate di(meth)acrylate, hydroxypivalic acid neopentyl glycol di(meth)acrylate, dicyclopentanyl di(meth)acrylate, tricyclodecane dimethanol (meth)acrylate, caprolactone-modified dicyclopentenyl di(meth)acrylate, ethylene oxide-modified phosphate di(meth)acrylate, di(acryloxyethyl)isocyanurate, allylated cyclohexyl di(meth)acrylate, ethoxylated bisphenol A diacrylate, and 9,9-bis[4-(2-acryloyloxyethoxy)phenyl]fluorene. Examples of such acrylates include bifunctional acrylates such as trimethylolpropane tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, propionic acid-modified dipentaerythritol tri(meth)acrylate, pentaerythritol tri(meth)acrylate, propylene oxide-modified trimethylolpropane tri(meth)acrylate, tris(acryloxyethyl)isocyanurate, and ε-caprolactone-modified tris-(2-(meth)acryloxyethyl)isocyanurate; tetrafunctional acrylates such as diglycerin tetra(meth)acrylate and pentaerythritol tetra(meth)acrylate; pentafunctional acrylates such as propionic acid-modified dipentaerythritol penta(meth)acrylate; and hexafunctional acrylates such as dipentaerythritol hexa(meth)acrylate and caprolactone-modified dipentaerythritol hexa(meth)acrylate. These acrylates may be used alone or in combination of two or more. In addition, from the viewpoint of compatibility with the (meth)acrylic acid ester polymer (A) and dispersibility of the colorant (C), the polyfunctional acrylate monomer preferably has a molecular weight of less than 1,000.

[0092] Among the above, from the viewpoint of the durability of the resulting pressure-sensitive adhesive, polyfunctional acrylate monomers containing an isocyanurate structure in the molecule, such as di(acryloxyethyl)isocyanurate, tris(acryloxyethyl)isocyanurate, and ε-caprolactone-modified tris-(2-(meth)acryloxyethyl)isocyanurate, or polyfunctional acrylate monomers containing a cyclic structure (particularly a cycloalkane structure) in the molecule, such as tricyclodecane dimethanol (meth)acrylate, are preferred, as are polyfunctional acrylates that are trifunctional or higher and contain an isocyanurate structure in the molecule. More preferred are ε-caprolactone-modified tris-(2-(meth)acryloxyethyl)isocyanurate or tricyclodecane dimethanol (meth)acrylate, more preferred are ε-caprolactone-modified tris-(2-acryloxyethyl)isocyanurate or tricyclodecane dimethanol acrylate, and most preferred are ε-caprolactone-modified tris-(2-acryloxyethyl)isocyanurate or tricyclodecane dimethanol acrylate.

[0093] From the viewpoint of improving the durability of the adhesive after active energy ray curing, the content of the active energy ray-curable component (D) in the adhesive composition P is preferably 1 part by mass or more as a lower limit, particularly preferably 3 parts by mass or more, and even more preferably 4 parts by mass or more, relative to 100 parts by mass of the (meth)acrylic acid ester polymer (A). On the other hand, from the viewpoint of the adhesive strength of the adhesive after active energy ray curing, the content is preferably 20 parts by mass or less as an upper limit, more preferably 15 parts by mass or less, particularly preferably 10 parts by mass or less, and even more preferably 6 parts by mass or less.

[0094] (1-5) Photopolymerization initiator (E) When ultraviolet rays are used as the active energy rays for curing the pressure-sensitive adhesive composition P, it is preferable that the pressure-sensitive adhesive composition P further contains a photopolymerization initiator (E). By containing the photopolymerization initiator (E) in this way, the active energy ray-curable component (D) can be polymerized efficiently, and the polymerization and curing time and the exposure dose of active energy rays can be reduced.

[0095] Examples of such photopolymerization initiators (E) include 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-phenylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino-propan-1-one, 4-(2-hydroxyethoxy)phenyl-2-(hydroxy-2-propyl)ketone, benzophenone, p-phenylbenzophenone, Examples of the benzophenone include 4,4'-diethylaminobenzophenone, dichlorobenzophenone, 2-methylanthraquinone, 2-ethylanthraquinone, 2-tert-butylanthraquinone, 2-aminoanthraquinone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-chlorothioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone, benzyl dimethyl ketal, acetophenone dimethyl ketal, p-dimethylaminobenzoic acid ester, oligo[2-hydroxy-2-methyl-1[4-(1-methylvinyl)phenyl]propanone], 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, etc. These may be used alone or in combination of two or more.

[0096] Among the above, phosphine oxide-based photopolymerization initiators are preferred because they are easily cleaved and can reliably cure adhesives even when irradiated with ultraviolet light through a member containing an ultraviolet absorber or when the adhesive contains an ultraviolet absorber. Specifically, 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, etc. are preferred.

[0097] The content of the photopolymerization initiator (E) in the pressure-sensitive 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), and 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, as the upper limit.

[0098] (1-6) Various additives If desired, various additives commonly used in acrylic pressure-sensitive adhesives, such as a silane coupling agent, an ultraviolet absorber, an anti-rust agent, an antistatic agent, a tackifier, an antioxidant, a light stabilizer, a softener, a refractive index adjuster, etc., can be added to the pressure-sensitive adhesive composition P. The polymerization solvent and dilution solvent described below are not included in the additives constituting the pressure-sensitive adhesive composition P.

[0099] Among the above, the pressure-sensitive adhesive composition P preferably contains a silane coupling agent, which improves adhesion to the adherend, whether the adherend is a plastic plate or a glass member, and provides better shatter prevention.

[0100] The silane coupling agent is preferably an organosilicon compound having at least one alkoxysilyl group in the molecule, which has good compatibility with the (meth)acrylic acid ester polymer (A) and has optical transparency.

[0101] 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; and mercapto group-containing silicon compounds such as 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, and 3-mercaptopropyldimethoxymethylsilane. , 3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropyltrimethoxysilane, N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane, and other amino group-containing silicon compounds, 3-chloropropyltrimethoxysilane, 3-isocyanatepropyltriethoxysilane, and condensates of at least one of these with alkyl group-containing silicon compounds such as methyltriethoxysilane, ethyltriethoxysilane, methyltrimethoxysilane, and ethyltrimethoxysilane. These may be used alone or in combination of two or more.

[0102] The content of the silane coupling agent in the pressure-sensitive adhesive composition P is preferably 0.01 parts by mass or more, particularly preferably 0.05 parts by mass or more, and even more preferably 0.1 parts by mass or more, relative to 100 parts by mass of the (meth)acrylic acid ester polymer (A). The content is also preferably 1 part by mass or less, particularly preferably 0.5 parts by mass or less, and even more preferably 0.3 parts by mass or less. By including the silane coupling agent in the above amount, the adhesion of the shatterproof pressure-sensitive adhesive sheet using the resulting pressure-sensitive adhesive to the adherend is improved, allowing the sheet to exhibit even better shatterproof properties.

[0103] The adhesive composition P also preferably contains an ultraviolet absorber. Examples of ultraviolet absorbers include benzophenone-based, benzotriazole-based, benzoate-based, benzoxazinone-based, triazine-based, phenyl salicylate-based, cyanoacrylate-based, and nickel complex salt-based compounds. Among these, from the viewpoints of compatibility with the (meth)acrylic acid ester polymer (A) and dispersibility with the colorant (C), benzophenone-based, benzotriazole-based, and triazine-based compounds are preferred, and benzophenone-based compounds are particularly preferred. These may be used alone or in combination of two or more.

[0104] When the adhesive composition P contains an ultraviolet absorber, the content of the ultraviolet absorber is preferably 0.01 parts by mass or more, particularly preferably 0.05 parts by mass or more, and even more preferably 0.1 parts by mass or more, relative to 100 parts by mass of the (meth)acrylic acid ester polymer (A). The content is also preferably 1 part by mass or less, particularly preferably 0.5 parts by mass or less, and even more preferably 0.2 parts by mass or less. By including the ultraviolet absorber in the above amount, even if there are components inside the display that are susceptible to ultraviolet degradation, the shatterproof adhesive sheet can exhibit an ultraviolet shielding effect, preventing the components from deteriorating due to ultraviolet rays.

[0105] (2) Preparation of adhesive composition The adhesive composition P can be produced by producing a (meth)acrylic acid ester polymer (A), mixing the resulting (meth)acrylic acid ester polymer (A) with a crosslinking agent (B) and a colorant (C), and optionally adding an active energy ray-curable component (D), a photopolymerization initiator (E), additives, etc.

[0106] The (meth)acrylic acid ester polymer (A) can be produced by polymerizing a mixture of monomers constituting the polymer using a conventional radical polymerization method. The polymerization of the (meth)acrylic acid ester polymer (A) is preferably carried out by a solution polymerization method, using a polymerization initiator as desired. However, the present invention is not limited to this, and the polymerization may be carried out without a solvent. Examples of polymerization solvents include ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, acetone, hexane, and methyl ethyl ketone, and two or more of them may be used in combination.

[0107] Examples of the polymerization initiator include azo compounds and organic peroxides, and two or more of them 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].

[0108] Examples of organic peroxides include benzoyl peroxide, t-butyl perbenzoate, cumene hydroperoxide, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, di(2-ethoxyethyl)peroxydicarbonate, t-butyl peroxyneodecanoate, t-butyl peroxypivalate, (3,5,5-trimethylhexanoyl)peroxide, dipropionyl peroxide, and diacetyl peroxide.

[0109] In the polymerization step, the weight average molecular weight of the resulting polymer can be adjusted by adding a chain transfer agent such as 2-mercaptoethanol.

[0110] Once the (meth)acrylic acid ester polymer (A) is obtained, a crosslinking agent (B), a colorant (C), and optionally a dilution solvent, an active energy ray-curable component (D), a photopolymerization initiator (E), additives, etc. are added to the solution of the (meth)acrylic acid ester polymer (A) and thoroughly mixed to obtain a solvent-diluted adhesive composition P (coating solution). Note that when a solid component is used for any of the above components, or when precipitation occurs when the component is mixed with other components in an undiluted state, that component may be dissolved or diluted alone in a dilution solvent before being mixed with other components.

[0111] Examples of the dilution solvent include aliphatic hydrocarbons such as hexane, heptane, and cyclohexane; aromatic hydrocarbons such as toluene and xylene; halogenated hydrocarbons such as methylene chloride and ethylene chloride; 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-based solvents such as ethyl cellosolve.

[0112] The concentration and viscosity of the coating solution prepared in this manner are not particularly limited as long as they are within a range that allows coating, and can be appropriately selected depending on the situation. For example, the adhesive composition P is diluted so that the concentration becomes 10 to 60 mass %. Note that the addition of a dilution solvent or the like is not a necessary condition for obtaining the coating solution, and as long as the adhesive composition P has a viscosity that allows coating, the addition of a dilution solvent is not necessary. In this case, the adhesive composition P becomes a coating solution in which the polymerization solvent for the (meth)acrylic acid ester polymer (A) itself serves as the dilution solvent.

[0113] (3) Formation of adhesive layer The colored adhesive layer 12 in this embodiment preferably comprises an adhesive obtained by crosslinking (a coating layer of) the adhesive composition P. The crosslinking of the adhesive composition P can usually be carried out by a heat treatment. Note that this heat treatment can also serve as a drying treatment for volatilizing diluent solvents and the like from the coating layer of the adhesive composition P applied to the desired object.

[0114] The heating temperature for the heat treatment is preferably 50 to 150° C., particularly preferably 70 to 120° C. The heating time is preferably 10 seconds to 10 minutes, particularly preferably 50 seconds to 2 minutes.

[0115] After the heat treatment, a curing period of about 1 to 2 weeks may be provided at room temperature (e.g., 23°C, 50% RH), if necessary. If this curing period is required, the adhesive will be formed after the curing period has elapsed; if no curing period is required, the adhesive will be formed after the heat treatment has been completed.

[0116] The above heat treatment (and curing) allows the (meth)acrylic acid ester polymer (A) to be sufficiently crosslinked via the crosslinking agent (B).

[0117] (4) Thickness of the colored adhesive layer The thickness of the colored adhesive layer 12 preferably has a lower limit of 5 μm or more, more preferably 10 μm or more, and particularly preferably 20 μm or more. When the lower limit of the thickness of the colored adhesive layer 12 is within the above range, the above-mentioned optical properties are easily satisfied in relation to the content of the colorant (C), and the desired adhesive strength is easily exhibited.

[0118] The upper limit of the thickness of the colored adhesive layer 12 is preferably 80 μm or less, more preferably 60 μm or less. From the viewpoint of the pencil hardness of the surface of the shatterproof adhesive sheet 1 facing the substrate 11, it is particularly preferably 40 μm or less, and even more preferably 30 μm or less. When the upper limit of the thickness of the colored adhesive layer 12 is as described above, processability is improved. Also, appearance defects due to indentations and the like are less likely to occur. Furthermore, in relation to the content of the colorant (C), the optical properties described above are more likely to be satisfied. The colored adhesive layer 12 may be formed as a single layer, or may be formed by laminating multiple layers.

[0119] (b) Polyurethane adhesive The urethane-based pressure-sensitive adhesive of the present embodiment contains a crosslinked urethane resin, and is preferably produced using a polyurethane polyol and a polyisocyanate crosslinking agent.

[0120] Polyurethane polyols are obtained by reacting a polyol with a polyisocyanate so that the equivalent ratio of isocyanate groups to hydroxyl groups is less than 1. Preferred polyols include polyester polyols and polyether polyols. Preferred polyether polyols include polypropylene glycol, polyethylene glycol, and polytetramethylene glycol.

[0121] The average number of functional groups per molecule of the polyether polyol is preferably 2.2 to 3.4, more preferably 2.3 to 3.3, and even more preferably 2.4 to 3.2. The number average molecular weight (Mn) of the polyether polyol is preferably 300 to 7,000, and more preferably 350 to 6,000.

[0122] Examples of polyisocyanates constituting polyurethane polyols include aromatic polyisocyanates, aliphatic polyisocyanates, araliphatic polyisocyanates, and alicyclic polyisocyanates. Examples of these include trimethylolpropane adducts, biurets, and nurates. Examples of aromatic polyisocyanates include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, and 4,4'-diphenylmethane diisocyanate.

[0123] The polymerization reaction between the polyol and polyisocyanate is generally carried out using a catalyst, such as a tin-based organometallic compound such as dioctyltin dilaurate.

[0124] On the other hand, examples of the polyisocyanate crosslinking agent include the above-mentioned trimethylolpropane adducts, biurets, nurates, etc. The amount of polyisocyanate crosslinking agent blended with polyurethane polyol is preferably such that the equivalent ratio of isocyanate groups to hydroxyl groups is 0.5 or more and 1.5 or less.

[0125] The amount of colorant (C) blended in the urethane-based adhesive and the thickness of the colored adhesive layer 12 are the same as in the case of the acrylic-based adhesive described above.

[0126] (c) Silicone adhesive The silicone-based adhesive in this embodiment may be a condensation type silicone adhesive or an addition reaction type silicone adhesive, but an addition reaction type silicone adhesive is preferred. The addition reaction type silicone adhesive preferably contains an addition reaction type silicone resin obtained from a first polydimethylsiloxane having at least two alkenyl groups per molecule and a second polydimethylsiloxane having at least two hydrosilyl groups per molecule, a silicone resin, and a catalyst.

[0127] Examples of silicone resins include monofunctional siloxane units [(CH3)3SiO 1 / 2] and tetrafunctional siloxane units [SiO 4 / 2 and Q units.] The molar ratio of M units / Q units is preferably 0.6 to 1.7.

[0128] The amount of silicone resin blended per 100 parts by mass of addition reaction type silicone resin is preferably 10 to 200 parts by mass, particularly preferably 15 to 100 parts by mass, and even more preferably 20 to 80 parts by mass. By blending the silicone resin in an amount of 10 parts by mass or more, the desired adhesive strength can be obtained. Furthermore, by blending the silicone resin in an amount of 200 parts by mass or less, good reworkability can be obtained, and in the event of a lamination error, display component parts, especially expensive display component parts, can be reused.

[0129] The catalyst is not particularly limited as long as it can cure the addition reaction type silicone resin (addition reaction between the first polydimethylsiloxane and the second polydimethylsiloxane), but platinum group metal compounds are preferred. The amount of catalyst blended per 100 parts by mass of the addition reaction type silicone resin is preferably 0.01 to 3 parts by mass, and more preferably 0.05 to 2 parts by mass, in terms of platinum content.

[0130] The amount of colorant (C) blended in the silicone-based adhesive and the thickness of the colored adhesive layer 12 are the same as in the case of the acrylic-based adhesive described above.

[0131] 1-3.Release sheet The release sheet 13 protects the colored adhesive layer 12 until the shatterproof adhesive sheet 1 is used, and is peeled off when the shatterproof adhesive sheet 1 (colored adhesive layer 12) is used. In the shatterproof adhesive sheet 1 according to this embodiment, the release sheet 13 is not necessarily required.

[0132] Examples of materials that can be used as the release sheet 13 include polyethylene films, polypropylene films, polybutene films, polybutadiene films, polymethylpentene films, polyvinyl chloride films, vinyl chloride copolymer films, polyethylene terephthalate films, polyethylene naphthalate films, polybutylene terephthalate films, polyurethane films, ethylene vinyl acetate films, ionomer resin films, ethylene-(meth)acrylic acid copolymer films, ethylene-(meth)acrylic acid ester copolymer films, polystyrene films, polycarbonate films, polyimide films, and fluororesin films. Crosslinked films of these materials can also be used. Furthermore, laminated films of these materials can also be used.

[0133] It is preferable that a release treatment is performed on the release surface of the release sheet 13 (particularly the surface that comes into contact with the colored adhesive layer 12). Examples of release agents used for the release treatment include alkyd-based, silicone-based, fluorine-based, unsaturated polyester-based, polyolefin-based, and wax-based release agents.

[0134] There are no particular restrictions on the thickness of release sheet 13, but it is usually about 20 to 150 μm.

[0135] 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 adhesive's cohesive strength increases, enabling it to exhibit better shatterproof properties. 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 even 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 adhesive strength, enabling it to exhibit better shatterproof properties. The method for measuring the gel fraction of the adhesive is as shown in the test examples described below.

[0136] (2) L*a*b* of colored adhesive layer The lightness L* of the colored adhesive layer 12, as defined by the CIE 1976 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. This makes it easier to achieve the lightness L* of the shatterproof adhesive sheet 1 at the preferred value described above, and when the display is turned off, it is possible to give the display a sense of unity with the black frame material and printed layer, thereby improving the harmony of the appearance.

[0137] On the other hand, from the viewpoint of improving the design by harmonizing the appearance and the visibility of the display, the lower limit 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 most preferably 60 or more.

[0138] Furthermore, the chromaticity a* of the colored adhesive layer 12, as defined by the CIE 1976 L*a*b* color system, is preferably -20 to 20, more preferably -10 to 10, particularly preferably -5 to 5, even more preferably -2 to 2, and most preferably -1.4 to 1.4. When the chromaticity a* is within the above range, the chromaticity a* of the shatterproof adhesive sheet 1 can be easily adjusted to the preferred value described above, improving the visibility of the display and further improving the design, particularly the appearance harmony of an in-vehicle display.

[0139] Furthermore, the chromaticity b* of the colored adhesive layer 12, as defined by the CIE 1976 L*a*b* color system, is preferably from -20 to 20, more preferably from -10 to 10, particularly preferably from -5 to 5, even more preferably from -2 to 2, and most preferably from -1 to 1. Having a chromaticity b* within the above range makes it easier to achieve the chromaticity b* of the shatterproof adhesive sheet 1 at the preferred value described above, improving the visibility of the display and further improving the design, particularly the appearance harmony of an in-vehicle display.

[0140] (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 even more preferably 40% or more. This improves the visibility of images and videos in the resulting display. The upper limit of the total light transmittance is not particularly limited, but is usually 100% or less. In consideration of the relationship with the lightness L* and the improvement in blackness in images and videos in the display, it is preferably 95% or less, more preferably 85% or less, particularly preferably 75% or less, even more preferably 65% ​​or less, and most preferably 55% or less.

[0141] (4) Haze value The haze value of the shatterproof adhesive sheet 1 according to this embodiment is typically 0% or more, preferably 0.1% or more, more preferably 1% or more, particularly preferably 3% or more, and most preferably 6% or more. When the lower limit of the haze value of the colored adhesive layer 12 is as described above, the lightness L* described above is more likely to be satisfied. On the other hand, the haze value of the colored adhesive layer 12 is preferably 60% or less, more preferably 40% or less, particularly preferably 25% or less, even more preferably 15% or less, and most preferably 10% or less. When the upper limit of the haze value of the colored adhesive layer 12 is as described above, the total image clarity and lightness L* of the shatterproof adhesive sheet 1 described above are more likely to be satisfied. The haze value in this specification is a value measured in accordance with JIS K7136:2000.

[0142] The haze value of the colored adhesive layer 12 is typically 0% or more, preferably 0.1% or more, more preferably 0.5% or more, and particularly preferably 1% or more. When the lower limit of the haze value of the colored adhesive layer 12 is as described above, the lightness L* described above is more likely to be met. On the other hand, the haze value of the colored adhesive layer 12 is preferably 60% or less, more preferably 40% or less, particularly preferably 20% or less, and even more preferably 8% or less. When the upper limit of the haze value of the colored adhesive layer 12 is as described above, the total image clarity and lightness L* of the shatterproof adhesive sheet 1 described above are more likely to be met.

[0143] (5) Adhesive strength The adhesive strength of the shatterproof adhesive sheet 1 according to this embodiment to soda-lime glass preferably has a lower limit of 0.05 N / 25 mm or more, more preferably 0.1 N / 25 mm or more, particularly preferably 1 N / 25 mm or more, and even more preferably 5 N / 25 mm or more. When the adhesive strength has a lower limit as described above, shatterproof properties are improved. Furthermore, the adhesive strength of the shatterproof adhesive sheet 1 according to this embodiment to soda-lime glass preferably has an upper limit of 50 N / 25 mm or less, more preferably 35 N / 25 mm or less, and particularly preferably 25 N / 25 mm or less. When the adhesive strength has an upper limit as described above, good reworkability is obtained, and in the event of a lamination error, display component parts, particularly expensive display component parts, can be reused.

[0144] Here, the adhesive strength in this specification basically refers to the adhesive strength measured by the 180-degree peel method in accordance with JIS Z0237:2009, in which the measurement sample is 25 mm wide and 100 mm long, and the measurement sample is attached to an adherend, pressurized at 0.5 MPa and 50°C for 20 minutes, and then left to stand for 24 hours under conditions of normal pressure, 23°C, and 50% RH, and then measured at a peel rate of 300 mm / min. In the case of an active energy ray-curable adhesive, the adhesive strength refers to the adhesive strength of the adhesive layer that has been cured by active energy rays after being attached to the adherend.

[0145] (6) Pencil hardness The pencil hardness of the surface of the substrate 11 side of the shatterproof adhesive sheet 1 according to this embodiment is preferably F or higher, and particularly preferably H or higher. When the shatterproof adhesive sheet 1 has such a pencil hardness, the surface of the shatterproof adhesive sheet 1 on the substrate 11 side has sufficient hardness. Therefore, when the shatterproof adhesive sheet 1 is used on the front side of a protective panel, it can provide excellent surface protection. Furthermore, when the shatterproof adhesive sheet 1 is used on the back side of a protective panel, it can provide excellent impact resistance. The method for measuring pencil hardness in the present invention is as shown in the test examples described below.

[0146] 3. Manufacturing of shatterproof adhesive sheets In one example of manufacturing the shatterproof adhesive sheet 1, a coating solution of the adhesive composition P is applied to the release surface of the release sheet 13, followed by heat treatment to thermally crosslink the adhesive composition P to form a coating layer, and then the substrate 11 is laminated to the coating layer. At this time, if the substrate 11 has a functional layer on one side, the side without the functional layer is usually brought into contact with the coating layer.

[0147] If a curing period is required, a curing period is allowed, or if no curing period is required, the coating layer is left as is to become the colored adhesive layer 12. This results in the shatterproof adhesive sheet 1. The conditions for the heat treatment and curing are as described above.

[0148] The coating solution of the pressure-sensitive adhesive composition P can be applied by, for example, bar coating, knife coating, roll coating, blade coating, die coating, gravure coating, or the like.

[0149] [Display body] A display according to one embodiment of the present invention includes a protective panel, and the above-described shatterproof adhesive sheet is provided on one or both sides of the protective panel. The shatterproof adhesive sheet may be attached directly to the protective panel or may be attached via another layer.

[0150] The display body according to the present embodiment may have a frame material or the like on the periphery as an example of a peripheral member, or may have a frame-shaped print layer or a print layer showing characters and symbols or the like formed on a part of one of the display body constituent members that constitutes the display body. Also, the display body may have both of these.

[0151] In the display according to the present embodiment, a shatterproof adhesive sheet having a colored adhesive layer is provided on the protective panel, so that when the display is turned off, the appearance of the display harmonizes well with surrounding components such as the frame material, the frame-shaped printed layer, the printed layer showing characters and symbols, etc., thereby improving the design. Furthermore, even if the protective panel is broken due to a large impact such as a fall in the case of a mobile display, or due to an accident in the case of an in-vehicle display, the shattered protective panel is prevented from scattering because the shatterproof adhesive sheet is attached to the protective panel.

[0152] 2 and 3 show a specific example of a display according to this embodiment. 2, the display device 10A according to the first embodiment is configured to include, from the bottom up, a display module 7, a film sensor 5 laminated thereon via an adhesive layer 6, a protective panel 2 with a patterned transparent conductive film 3 laminated thereon via an adhesive layer 4, and a shatterproof adhesive sheet 1 (with the release sheet 13 already peeled off) attached to the protective panel 2 via a colored adhesive layer 12. That is, in this display device 10A, the shatterproof adhesive sheet 1 is provided on the front side of the protective panel 2 (the side opposite the display module 7).

[0153] 3, the display device 10B according to the second embodiment is configured to include, from the bottom up, a display module 7, a film sensor 5 laminated thereon via an adhesive layer 6, a shatterproof adhesive sheet 1 (with the release sheet 13 already peeled off) laminated thereon via an adhesive layer 4, and a protective panel 2 with a patterned transparent conductive film 3 laminated thereon via a colored adhesive layer 12 of the shatterproof adhesive sheet 1. That is, in this display device 10B, the shatterproof adhesive sheet 1 is provided on the back side of the protective panel 2 (the display module 7 side).

[0154] In the above-described display devices 10A and 10B, the transparent conductive film 3 is provided on the protective panel 2, but this is not limitative, and the transparent conductive film 3 may be provided in another location.

[0155] Examples of the display module 7 include a liquid crystal (LCD) module, a light emitting diode (LED) module, an organic electroluminescence (organic EL) module, and electronic paper.

[0156] The adhesive layer 6 and the adhesive layer 4 may be formed of any desired adhesive or adhesive sheet, and may be formed of the same adhesive (but preferably does not contain a colorant) as the colored adhesive layer 12 of the shatterproof adhesive sheet 1. Examples of the desired adhesive include acrylic adhesives, rubber adhesives, silicone adhesives, urethane adhesives, polyester adhesives, and polyvinyl ether adhesives, with acrylic adhesives being preferred.

[0157] The film sensor 5 is usually composed of a base film 51 and a patterned transparent conductive film 52. The base film 51 is not particularly limited, but examples thereof include polyethylene terephthalate film, polyethylene naphthalate film, polycarbonate film, polymethyl methacrylate film, triacetyl cellulose film, and polypropylene film.

[0158] Examples of the transparent conductive film 52 include metals such as platinum, gold, silver, and copper; oxides such as tin oxide, indium oxide, cadmium oxide, zinc oxide, and zinc dioxide; composite 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; and non-oxide compounds such as chalcogenides, lanthanum hexaboride, titanium nitride, and titanium carbide, with tin-doped indium oxide (ITO) being preferred.

[0159] In addition, the transparent conductive film 52 of the film sensor 5 in the above-mentioned display devices 10A and 10B is located above the film sensor 5 in Figures 2 and 3, but this is not limited to this and it may also be located below the film sensor 5.

[0160] The protective panel 2 is a member for protecting the display module 7 and other internal members of the displays 10A and 10B from external factors, and is preferably made of a glass plate, a plastic plate, or a laminate containing these.

[0161] The glass plate is not particularly limited, and examples thereof include chemically strengthened glass, alkali-free glass, quartz glass, soda-lime 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, but is usually 0.1 to 5 mm, and preferably 0.2 to 2 mm.

[0162] The plastic plate is not particularly limited, and examples thereof include an acrylic plate, a polycarbonate plate, etc. The thickness of the plastic plate is not particularly limited, but is usually 0.2 to 5 mm, and preferably 0.4 to 3 mm.

[0163] A desired functional layer (hard coat layer, anti-glare layer, etc.) may be provided on one or both sides of the glass plate or plastic plate.

[0164] In the above display devices 10A and 10B, a transparent conductive film 3 is patterned and provided on the protective panel 2. The transparent conductive film 3 may be made of the same material as the transparent conductive film 52 of the above film sensor 5. Typically, one of the transparent conductive film 3 and the transparent conductive film 52 of the film sensor 5 forms a circuit pattern in the X-axis direction, and the other forms a circuit pattern in the Y-axis direction.

[0165] It is preferable that the display devices 10A and 10B according to the present embodiment do not have an anti-reflection layer, since the anti-reflection layer may reduce the surface hardness and may not achieve the desired harmony in appearance.

[0166] When manufacturing the display device 10A, the release sheet 13 of the shatterproof adhesive sheet 1 is peeled off and the exposed colored adhesive layer 12 is 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 shatterproof adhesive sheet 1. Alternatively, a display device (display device 10A without the shatterproof adhesive sheet 1 attached) can be manufactured by a conventional method, and then the shatterproof adhesive sheet 1 can be attached to the front side of the protective panel 2 (the side opposite the display module 7).

[0167] Furthermore, when manufacturing the display device 10B, the release sheet 13 of the shatterproof adhesive sheet 1 is peeled off, and the exposed colored adhesive layer 12 is attached to the transparent conductive film 3 provided on the back side of the protective panel 2, and then the display device 10B can be manufactured by conventional methods using the protective panel 2 with the shatterproof adhesive sheet 1 attached.

[0168] When the colored adhesive layer 12 is active energy ray-curable, the shatterproof adhesive sheet 1 is attached via the colored adhesive layer 12 as described above, and then the colored adhesive layer 12 is irradiated with active energy rays. This polymerizes the active energy ray-curable component (C) in the colored adhesive layer 12, curing the colored adhesive layer 12. The colored adhesive layer 12 may be irradiated with active energy rays through a member that transmits the active energy rays, for example, through the base material 11 of the shatterproof adhesive sheet 1.

[0169] The active energy ray refers to an electromagnetic wave or a charged particle beam that has an energy quantum, and specific examples thereof include ultraviolet rays, electron beams, etc. Among active energy rays, ultraviolet rays are particularly preferred because they are easy to handle.

[0170] The ultraviolet irradiation can be performed using a high-pressure mercury lamp, a fusion H lamp, a xenon lamp, or the like, and the amount of ultraviolet irradiation is set to an illuminance of 50 to 1000 mW / cm. 2 It is preferable that the intensity is about 100 to 500 mW / cm 2 The light intensity is preferably about 50 to 10,000 mJ / cm. 2 is preferably 200 to 7000 mJ / cm 2 More preferably, it is 500 to 3000 mJ / cm 2 On the other hand, the electron beam irradiation can be carried out by an electron beam accelerator or the like, and the irradiation dose of the electron beam is preferably about 10 to 1000 krad.

[0171] As shown in FIG. 4, the display units 10A and 10B according to this embodiment preferably have a frame material 8 at their periphery. The frame material 8 is preferably a dark or deep color such as black, brown, navy blue, purple, or blue, and is particularly preferably black. Furthermore, the color of the frame material 8, as defined by the CIE 1976 L*a*b* color system, preferably has a lightness L* of 5 to 95, a chromaticity a* of −40 to 40, and a chromaticity b* of −40 to 40, more preferably a lightness L* of 10 to 80, a chromaticity a* of −30 to 30, and a chromaticity b* of −30 to 30, and even more preferably a lightness L* of 15 to 70, a chromaticity a* of −20 to 20, and a chromaticity b* of −20 to 20. Having such a color, the frame material 8 is easily recognized by the human eye as a frame material with a luxurious feel. Furthermore, since the frame material 8 has the above-mentioned color, the colored adhesive layer 12 in this embodiment has a more integrated feel with the frame material 8, resulting in a better harmony in appearance.

[0172] In the above-mentioned display bodies 10A and 10B, the shatterproof adhesive sheet 1 having the colored adhesive layer 12 is attached to the protective panel 2, which results in a good appearance harmony with the frame material 8 when the light is off, thereby improving the design. Furthermore, even if the protective panel 2 is broken due to an impact or the like, the shatterproof adhesive sheet 1 attached to the protective panel 2 prevents the broken protective panel 2 from scattering.

[0173] The above-described embodiments have been described to facilitate understanding of the present invention, and are not intended to limit the present invention. Therefore, each element disclosed in the above embodiments is intended to include all design modifications and equivalents that fall within the technical scope of the present invention.

[0174] For example, the release sheet 13 may be omitted from the shatterproof adhesive sheet 1. Furthermore, another layer may be laminated on the surface of the substrate 11 opposite to the colored adhesive layer 12. Furthermore, another layer may be laminated between the substrate 11 and the colored adhesive layer 12. [Example]

[0175] The present invention will be explained in more detail below with reference to examples, but the scope of the present invention is not limited to these examples.

[0176] Example 1 1. Preparation of (meth)acrylic acid ester polymer A (meth)acrylic acid ester polymer (A) was prepared by copolymerizing 60 parts by mass of 2-ethylhexyl acrylate, 20 parts by mass of methyl methacrylate, and 20 parts by mass of 2-hydroxyethyl acrylate by solution polymerization. The molecular weight of this (meth)acrylic acid ester polymer (A) was measured by the method described below, and the weight average molecular weight (Mw) was found to be 700,000.

[0177] 2. Preparation of adhesive composition 100 parts by mass (solid content equivalent; same below) of the (meth)acrylic acid ester polymer (A) obtained in step 1 above, 0.2 parts by mass of trimethylolpropane-modified tolylene diisocyanate (manufactured by Toyochem Co., Ltd., product name "BHS8515") as the crosslinking agent (B), 0.5 parts by mass of a carbon black-based black pigment (C1) as the colorant (C), and 0.2 parts by mass of 3-glycidoxypropyltrimethoxysilane as the silane coupling agent were mixed, thoroughly stirred, and diluted with methyl ethyl ketone to obtain a coating solution of the adhesive composition.

[0178] Here, the formulations (solid content equivalent) of the pressure-sensitive adhesive compositions when the (meth)acrylic acid ester polymer (A) is taken as 100 parts by mass (solid content equivalent) are shown in Table 1. Details of the abbreviations and the like shown in Table 1 are as follows. [(Meth)acrylic acid ester polymer (A)] 2EHA: 2-ethylhexyl acrylate MMA: methyl methacrylate HEA: 2-hydroxyethyl acrylate BA: n-butyl acrylate AA: acrylic acid MA: methyl acrylate IBXA: Isobornyl acrylate ACMO: N-acryloylmorpholine [Crosslinking agent (B)] TDI: Trimethylolpropane modified tolylene diisocyanate Epoxy: 1,3-bis(N,N-diglycidylaminomethyl)cyclohexane Colorant (C) C1 to C2: Carbon black-based black pigments having the physical properties shown in Table 2 [Active energy ray-curable component (D)] ε-Caprolactone modified tris-(2-acryloxyethyl) isocyanurate [Photopolymerization initiator (E)] 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide [Silane coupling agents] 3-Glycidoxypropyltrimethoxysilane [UV absorber] 2,2-Dihydroxy-4-methoxybenzophenone

[0179] 3. Manufacturing of adhesive sheets The coating solution for forming the antiglare hard coat layer was prepared by mixing 100 parts by weight (solids equivalent; the same applies to other components below) of a polyfunctional (meth)acrylate (manufactured by Shin-Nakamura Chemical Co., Ltd., product name "NK Ester A-DPH"), 4.3 parts by weight of 1-hydroxycyclohexyl phenyl ketone as a photopolymerization initiator, 11 parts by weight of silica microparticles (manufactured by Fuji Silysia Chemical Ltd., product name "Sylophorbic 702", average particle size 4.1 μm), 0.01 parts by weight of a leveling agent (manufactured by Dow Corning Toray Co., Ltd., product name "SH28"), and 8.3 parts by weight of silica nanoparticles (manufactured by Nissan Chemical Industries, Ltd., product name "MIBK-ST", average particle size: 10 nm), and diluting with propylene glycol monomethyl ether to prepare a coating solution with a solids concentration of 30%.

[0180] The coating solution was applied to one side of a polyethylene terephthalate (PET) film (manufactured by Toray Industries, Inc., product name "125-U403", thickness 125 μm) using a Mayer bar #10 so that the film thickness after drying would be 1.5 μm, and the film was dried at 70°C for 1 minute. Next, under a nitrogen atmosphere, a high-pressure mercury lamp was used to apply the coating to the film at an illuminance of 200 mW / cm. 2 , light intensity 300mJ / cm 2 The film was then irradiated with ultraviolet light for 10 seconds to obtain a PET film (tensile modulus: 5.0 GPa, haze value: 4.0%) with an antiglare hard coat layer (AG-HC layer).

[0181] The adhesive composition coating solution obtained in step 2 was applied using a knife coater to the release-treated surface of a release sheet (manufactured by Lintec Corporation, product name "SP-PET752150"), one side of which had been treated with a silicone-based release agent for release of a polyethylene terephthalate film. The coating was then heated at 90°C for 1 minute to form a coating layer.

[0182] Next, the side of the PET film with the AG-HC layer opposite the AG-HC layer was attached to the coating layer, and the film was cured for 7 days under conditions of 23°C and 50% RH to produce a shatterproof adhesive sheet consisting of a PET film with an AG-HC layer / colored adhesive layer (thickness: 25 μm) / release sheet.

[0183] The thickness of the colored adhesive layer is a value measured in accordance with JIS K7130 using a constant pressure thickness measuring instrument (manufactured by Teclock Corporation, product name "PG-02").

[0184] [Examples 2 to 9, Comparative Examples 1 to 3] Shatterproof pressure-sensitive adhesive sheets were produced in the same manner as in Example 1, except that the types and proportions of the monomers constituting the (meth)acrylic acid ester polymer (A), the weight-average molecular weight (Mw) of the (meth)acrylic acid ester polymer (A), the type and amount of the crosslinking agent (B), the type and amount of the colorant (C), the amount of the active energy ray-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 pressure-sensitive adhesive layer were changed as shown in Table 1. In Comparative Examples 1 to 3, an uncolored pressure-sensitive adhesive layer was formed. In Example 8, an active energy ray-curable colored pressure-sensitive adhesive layer was formed, and in Comparative Example 2, an active energy ray-curable pressure-sensitive adhesive layer was formed.

[0185] Example 10 A coating solution of a silicone-based pressure-sensitive adhesive composition was prepared by mixing 100 parts by mass of an addition reaction type silicone resin (manufactured by Shin-Etsu Chemical Co., Ltd., "KS-847H"), 25 parts by mass of a silicone resin (manufactured by Dow Corning Toray Co., Ltd., "SD-4584"), 0.6 parts by mass of a platinum catalyst (manufactured by Dow Corning Toray Co., Ltd., "SRX 212 CATALYST"), 0.5 parts by mass of a carbon black-based black pigment (C2) as a colorant (C), and 50 parts by mass of methyl ethyl ketone as a diluent. Using this coating solution, a shatterproof pressure-sensitive adhesive sheet (having a colored pressure-sensitive adhesive layer made of a silicone-based pressure-sensitive adhesive) was produced in the same manner as in Example 1. However, the coating layer was formed by heat treatment at 130°C for 1 minute.

[0186] Comparative Example 4 A coating solution was prepared in the same manner as in Example 10, except that colorant (C) was not added, and a shatterproof adhesive sheet (having an adhesive layer made of a silicone-based adhesive) was produced using the coating solution in the same manner as in Example 10.

[0187] Example 11 100 parts by mass of trifunctional polypropylene glycol (number average molecular weight 1000), 7 parts by mass of a trimethylolpropane adduct of tolylene diisocyanate, 0.01 parts by mass of dioctyltin dilaurate, and 43 parts by mass of toluene were charged and reacted for 3 hours at 100° C. Then, when the presence of isocyanate groups could no longer be confirmed using an infrared spectrophotometer, the mixture was cooled to obtain a polyurethane polyol solution.

[0188] 100 parts by mass of the obtained polyurethane polyol, 15 parts by mass of a trimethylolpropane adduct of tolylene diisocyanate, and 0.5 parts by mass of a carbon black-based black pigment (C2) as colorant (C) were mixed, thoroughly stirred, and diluted with ethyl acetate to obtain a coating solution of a urethane-based pressure-sensitive adhesive composition. Using this coating solution, a shatterproof pressure-sensitive adhesive sheet (having a colored pressure-sensitive adhesive layer made of a urethane-based pressure-sensitive adhesive) was produced in the same manner as in Example 1. However, the coating layer was formed by heat treatment at 90°C for 1 minute.

[0189] Comparative Example 5 A coating solution was prepared in the same manner as in Example 11, except that colorant (C) was not added, and a shatterproof adhesive sheet (having an adhesive layer made of a urethane-based adhesive) was produced using the coating solution in the same manner as in Example 11.

[0190] The weight average molecular weight (Mw) mentioned above is a weight average molecular weight in terms of polystyrene measured by gel permeation chromatography (GPC) under the following conditions (GPC measurement). <Measurement conditions> GPC measuring device: Tosoh HLC-8020 GPC columns (passed in the following order): Tosoh Corporation TSK guard column HXL-H TSK gel GMHXL (×2) TSK gel G2000HXL Measurement solvent: tetrahydrofuran ·Measurement temperature: 40℃

[0191] [Test Example 1] (Measurement of total light transmittance) The total light transmittance (%) of the shatterproof adhesive sheets (with the release sheet already removed) obtained in the examples and comparative examples was measured using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name "NDH-5000") in accordance with JIS K7361-1:1997.

[0192] In addition, in the examples and comparative examples, a release sheet was laminated on the coating layer of the pressure-sensitive adhesive composition instead of the PET film with the AG-HC layer, and a measurement sample was prepared having a configuration of release sheet / (colored) pressure-sensitive adhesive layer (thickness: 25 μm) / release sheet. The total light transmittance (%) of the (colored) pressure-sensitive adhesive layer in the obtained measurement sample was measured in the same manner as above. The respective results are shown in Table 3.

[0193] [Test Example 2] (Haze Value Measurement) The haze values ​​(%) of the shatterproof adhesive sheets (release sheets already removed) obtained in the examples and comparative examples were measured using a haze meter (manufactured by Nippon Denshoku Industries Co., Ltd., product name "NDH-5000") in accordance with JIS K7136:2000. Furthermore, the haze values ​​(%) of the (colored) adhesive layers of the measurement samples prepared in the same manner as in Test Example 1 were measured in the same manner as above. The results are shown in Table 3.

[0194] [Test Example 3] (Measurement of L*a*b*) The shatterproof adhesive sheets (with the release sheet already removed) obtained in the examples and comparative examples were measured for lightness L*, chromaticity a*, and chromaticity b* as defined by the CIE 1976 L*a*b* color system using a simultaneous spectrophotometric colorimeter (manufactured by Nippon Denshoku Industries Co., Ltd., product name "SQ2000") in accordance with JIS K7136:2000. Furthermore, the lightness L*, chromaticity a*, and chromaticity b* of the (colored) adhesive layer in the measurement sample prepared in the same manner as in Test Example 1 were measured in the same manner as above. The respective results are shown in Table 3.

[0195] [Test Example 4] (Gel fraction) A measurement sample prepared in the same manner as in Test Example 1 was cut to a size of 80 mm x 80 mm, the (colored) adhesive layer was wrapped in a polyester mesh (product name: Tetoron mesh #200), and the mass was measured on a precision balance. The mass of the mesh alone was subtracted to calculate the mass of the adhesive alone. This mass was designated M1.

[0196] Next, the adhesive wrapped in the polyester mesh was immersed in ethyl acetate at room temperature (23°C) for 24 hours. The adhesive was then removed and air-dried for 24 hours in an environment with a temperature of 23°C and a relative humidity of 50%, and then dried in an oven at 80°C for 12 hours. After drying, the mass was weighed using a precision balance, and the mass of the adhesive alone was calculated by subtracting the mass of the mesh alone. This mass was designated M2. The gel fraction (%) was expressed as (M2 / M1) x 100. The results are shown in Table 3.

[0197] [Test Example 5] (Measurement of image clarity) For the shatterproof adhesive sheets (with the release sheet already removed) obtained in the examples and comparative examples, the image clarity (%) of five types of optical combs (comb widths: 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm, and 2.0 mm) was measured using an image clarity measuring device (manufactured by Suga Test Instruments Co., Ltd., product name "ICM-10P") in accordance with the transmission method of JIS K7374:2007, and the total value was calculated. The results are shown in Table 3.

[0198] [Test Example 6] (Measurement of adhesive strength) The shatterproof adhesive sheets obtained in the examples and comparative examples were cut into a piece 25 mm wide and 100 mm long, which was used as a sample.

[0199] The release sheet was peeled off from the sample in an environment of 23°C and 50% RH, and the exposed (colored) adhesive layer was attached to soda lime glass (manufactured by Nippon Sheet Glass Co., Ltd.), and then pressurized at 0.5 MPa and 50°C for 20 minutes in an autoclave manufactured by Kurihara Manufacturing Co., Ltd. Then, it was left to stand under conditions of 23°C and 50% RH for 24 hours.

[0200] The shatterproof adhesive sheets of Example 7 and Comparative Example 2 were irradiated with active energy rays through the PET film with the AG-HC layer under the following conditions to cure the (colored) adhesive layer.

[0201] Next, adhesive strength (N / 25 mm) was measured using a tensile tester (manufactured by Orientec Co., Ltd., product name "Tensilon") at a peel speed of 300 mm / min and a peel angle of 180 degrees. Measurements were conducted under conditions other than those described here in accordance with JIS Z0237:2009. The results are shown in Table 3.

[0202] <Activated energy ray irradiation conditions> -High pressure mercury lamp used ·Illuminance 200mW / cm 2 ,Light intensity 2000mJ / cm 2 The UV illuminance and light intensity meter used is the "UVPF-A1" manufactured by Eye Graphics.

[0203] [Test Example 7] (Measurement of pencil hardness) The release sheet was peeled off from the shatterproof adhesive sheet obtained in the examples and comparative examples, and the exposed (colored) adhesive layer was attached to soda lime glass. The pencil hardness of the substrate surface (antiglare hard coat layer surface) of the shatterproof adhesive sheet was then measured in accordance with JIS K5600 using an electric pencil scratch hardness tester (manufactured by Yasuda Seiki Seisakusho, product name "No. 553-M1"). The results are shown in Table 3.

[0204] [Test Example 8] (Evaluation of Appearance Harmony) The release sheet was peeled off from the shatterproof adhesive sheet obtained in the Examples and Comparative Examples, and the exposed (colored) adhesive layer was attached to a soda-lime glass (manufactured by Nippon Sheet Glass Co., Ltd., 70 mm long x 70 mm wide x 1.1 mm thick). A frame material made of black resin plastic (L*: 38.5, a*: -0.2, b*: 0.3) was attached to the periphery of the obtained laminate, and this was used as a sample.

[0205] The resulting sample was placed on a black-printed paper background (L*: 29.8, a*: -0.7, b*: 0.6). The sample was then visually inspected under a three-band fluorescent lamp (distance from the lamp: 200 cm) to determine whether the frame and the inner portion of the frame (corresponding to the display portion of the display) blended in (had a sense of unity). The appearance harmony was evaluated according to the following criteria. The results are shown in Table 3. ⊚: The frame material and the display part were very compatible with each other. ○: The frame material and the display part were blended together to some extent. ×: The frame material and the display portion clearly did not blend well together.

[0206] The color of the frame material and the black printed paper (L*a*b* as defined by the CIE 1976 L*a*b* color system) was measured using a spectrophotometer (manufactured by BYK, product name "Spectro-Guide").

[0207] [Test Example 9] (Evaluation of visibility) On a 15.6-inch display with a resolution of 1366 x 768 (manufactured by Fujitsu, product name "LITEBOOK A574 / H"), black text (font: MS P Gothic) was displayed at 100% resolution on a white background, with sizes ranging from 5 to 20 points (in 1-point increments).

[0208] A sample prepared in the same manner as in Test Example 8 was placed on the display. The size of the characters that could be seen by eye was checked at a position 50 cm from the display, and the visibility was evaluated according to the following criteria. The results are shown in Table 3. ◎: 6-point characters were visible. ○: 6-point characters were not completely visible, but 8-point characters were visible. △: 8-point characters were not completely visible, but 15-point characters were visible. ×: 15-point characters were not visible.

[0209] Test Example 10 (Evaluation of blackening ability) On a 15.6-inch display with a resolution of 1366 x 768 (manufactured by Fujitsu, product name "LITEBOOK A574 / H"), black text (font: MS P Gothic) was displayed at 50 point size and 100% resolution against a white background.

[0210] A sample prepared in the same manner as in Test Example 8 was placed on the display. The change in the blackness of the letters before and after sample placement was visually confirmed at a position 50 cm from the display, and the blackness imparting ability was evaluated according to the following criteria. The results are shown in Table 3. ◎: When the sample was placed, the blackness of the letters improved, making them easier to see. ○: When the sample was placed, the blackness of the letters improved, but the background was dark and it became difficult to see. ×: The blackness of the letters did not change before and after sample placement.

[0211] [Test Example 11] (Evaluation of shatterproofness) The release sheet of the shatterproof adhesive sheet obtained in each of the Examples and Comparative Examples was peeled off, and the exposed (colored) adhesive layer was adhered to a soda-lime glass plate (manufactured by Nippon Sheet Glass Co., Ltd.) measuring 170 mm long, 150 mm wide, and 1 mm thick. A laminate consisting of the glass plate and the shatterproof adhesive sheet was then placed on two 10 mm high stands placed on a table. The shatterproof adhesive sheet was facing upward (away from the stands), with the laminate resting on each of the stands for up to 10 mm from both ends of the long side, and the center was raised (10 mm high). A 31.75 mm diameter iron ball (200 g) was then dropped onto the center of the laminate from a height of 30 cm. The state of the laminate was then visually observed, and shatterproofness was evaluated according to the following criteria. The results are shown in Table 3. Good: The shatterproof adhesive sheet did not tear and the glass did not shatter. ×: The shatterproof adhesive sheet was torn and the glass was scattered.

[0212] [Table 1]

[0213] [Table 2]

[0214] [Table 3]

[0215] As can be seen from Table 3, the products using the shatterproof adhesive sheets obtained in the examples had excellent appearance harmony with the frame material, and also had excellent character visibility, blackening ability, and shatterproofing properties. [Industrial Applicability]

[0216] The shatterproof pressure-sensitive adhesive sheet of the present invention can be suitably used for, for example, displays that are required to blend in appearance with surrounding components when turned off, particularly for vehicle-mounted displays. [Explanation of symbols]

[0217] 1... Shatterproof adhesive sheet 11...Base material 12...Colored adhesive layer 13...Release sheet 2...Protection panel 3...Transparent conductive film 4...Adhesive layer 5...Film sensor 51...Base film 52...Transparent conductive film 6...Adhesive layer 7...Display module 8…Frame material 10A,10B…Display body

Claims

1. A shatterproof adhesive sheet provided on at least one surface of a protective panel used in a display, A substrate; A colored adhesive layer Equipped with the adhesive constituting the colored adhesive layer contains a colorant, The average haze, which is the average value of the haze value at a wavelength of 780 nm and the haze value at a wavelength of 380 nm, of a solution obtained by diluting the colorant 10,000 times with ethyl acetate is 1% or more and 20% or less. A shatterproof adhesive sheet characterized by:

2. A shatterproof adhesive sheet provided on at least one surface of a protective panel used in a display, A substrate; A colored adhesive layer Equipped with the adhesive constituting the colored adhesive layer contains a colorant, The haze value of a solution obtained by diluting the colorant 10,000 times with ethyl acetate at a wavelength of 780 nm is 0.1% or more but 20%, and The haze value of a solution obtained by diluting the colorant 10,000 times with ethyl acetate at a wavelength of 380 nm is 1% or more and 20% or less. A shatterproof adhesive sheet characterized by:

3. 3. The shatterproof adhesive sheet according to claim 1, wherein the lightness L* defined by the CIE 1976 L*a*b* color system is 92 or less.

4. A shatterproof adhesive sheet described in any one of claims 1 to 3, characterized in that the total image clarity of optical combs of 0.125 mm, 0.25 mm, 0.5 mm, 1.0 mm and 2.0 mm measured in accordance with JIS K7374:2007 is 400 or more.

5. The shatterproof pressure-sensitive adhesive sheet according to any one of claims 1 to 4, characterized in that the total light transmittance is 5% or more and 95% or less.

6. The shatterproof pressure-sensitive adhesive sheet according to any one of claims 1 to 5, wherein the substrate is a plastic film having a functional layer.

7. A display body having a protective panel, The protective panel has one or both surfaces provided with the shatterproof adhesive sheet according to any one of claims 1 to 6. A display characterized by:

8. 8. The display according to claim 7, further comprising a frame material on the periphery.

9. 9. The display according to claim 7, wherein a print layer is formed on a part of one of the display member components that constitutes the display.

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