Laminated body for frame

Abstract

The present invention provides a laminate for a frame that can satisfy steel wool resistance and low dielectric loss in a frequency band above 5 GHz when used in a frame of a mobile phone or the like. A laminate for a frame, characterized in that it is a laminate for a frame having a coating layer on a polycarbonate substrate or a substrate that is a composite plate composed of polymethyl methacrylate and polycarbonate, and satisfies the following conditions 1 and 2. Condition 1: The relationship between the relative dielectric constant Dk and the dielectric loss tangent Df measured by the separated dielectric resonator method in a frequency band above 5 GHz satisfies the following formula. #imgabs0#Condition 2: Make #0000 steel wool at 1.5 kg / cm 2 After the load was passed back and forth on the coating layer 300 times, no scratches were found visually.

Description

Technical Field

[0001] The present invention relates to a laminate for a housing having excellent properties and suitable for use as a housing of mobile communication devices such as mobile phones. Background Art

[0002] In recent years, highly portable terminal devices such as mobile phones, cellular phones, and tablet terminals with communication functions have become widely available.

[0003] In communications equipment, increasing communication speeds and the amount of data transmitted and received are driving the rise of high-frequency communication methods such as millimeter waves. This has led to the urgent need to reduce communication errors caused by noise, dielectric loss, and other factors in transmitted and received data signals.

[0004] In such communication equipment, metal and glass are currently preferred, but there are reports that metal has poor radio wave transmittance and high-frequency radio waves do not easily pass through glass. As a countermeasure, it is expected that plastic housings with excellent dielectric loss can be used as the housings of the terminal equipment.

[0005] On the other hand, plastic frames have the disadvantage of being easily scratched, resulting in a less premium appearance compared to glass and metal frames. Therefore, a coating is often applied to the surface of the plastic frame. These coatings typically use acrylic resins, which are photocured by exposure to active light, resulting in excellent surface hardness (steel wool resistance).

[0006] Patent Document 1 below proposes a method for transferring a functional hard coating layer as a coating layer for plastic frames to achieve scratch resistance. Patent Documents 2 to 4 use silicon compounds to achieve smoothness, mold release properties, flexibility (softness), and steel wool resistance due to stress relaxation.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2019-25739

[0010] Patent Document 2: Japanese Patent Application Laid-Open No. 2015-196748

[0011] Patent Document 3: International Publication No. WO 2015 / 152288

[0012] Patent Document 4: International Publication No. WO 2015 / 152289 Summary of the Invention

[0013] For laminated bodies as described above, it is usually required to improve the steel wool resistance of the coating layer. On the other hand, in the frame of communication equipment, in order to be applicable to the communication in the high frequency band area, it is necessary to have a low dielectric loss. Therefore, the subject of the present invention is to provide a frame for a mobile phone etc., having a steel wool resistance and a low dielectric loss frame laminated body in the frequency band above 5 GHz.

[0014] That is, the present invention relates to a laminate for a frame, characterized in that it is a laminate for a frame having a coating layer on a polycarbonate substrate or a substrate which is a composite plate composed of polymethyl methacrylate and polycarbonate, and the laminate satisfies the following conditions 1 and 2.

[0015] Condition 1: The relationship between the relative dielectric constant Dk and the dielectric loss tangent Df measured by the split dielectric resonator method in a frequency band of 5 GHz or higher satisfies the following equation.

[0016]

[0017] Condition 2: Make #0000 steel wool at 1.5kg / cm 2 After the load was moved back and forth on the coating layer 300 times, no scratches were found visually.

[0018] According to the present invention, it is possible to provide a laminate for a housing that has scratch resistance and low dielectric loss characteristics in a frequency band of 5 GHz or higher. DETAILED DESCRIPTION

[0019] Hereinafter, each element constituting the present invention will be described in detail, but the following description is an example of an embodiment of the present invention, and the present invention is not limited to the following description as long as it does not exceed its main purpose. It should be noted that when the expression "~" is used in this specification, it is used as an expression that includes the numerical value or physical property value before and after it. In addition, in the present invention, when the expression "(meth)acryloyl" is used, it refers to one or both of "acryloyl" and "methacryloyl". The same applies to "(meth)acrylate" and "(meth)acryloyl".

[0020] The laminate for a frame of the present invention comprises a coating layer on a substrate, and the substrate is a polycarbonate substrate or a composite plate composed of polymethyl methacrylate and polycarbonate.

[0021] The dielectric loss of the laminate is calculated from the relative dielectric constant Dk, the dielectric loss tangent Df, and the frequency f of the signal using the following formula.

[0022]

[0023] (k: constant, f: signal frequency, Df: dielectric loss tangent, Dk: relative dielectric constant)

[0024] Therefore, in order to use it in the high frequency area, it is necessary to In the present invention, for Dk and Df measured by the split dielectric resonator method in a frequency band above 5 GHz, Preferably it is <0.015, more preferably <0.012. If the range is within the range of , the laminate can be used as a frame body without any problem even for high-frequency band communications.

[0025] The split dielectric resonator method is one method capable of highly accurate measurements of relative permittivity (Dk) and dielectric loss tangent (Df) in the 1 GHz to 20 GHz frequency band. This measurement is a type of resonance method. The resonator has a central space for inserting the substrate under test. The relative permittivity (Dk) and dielectric loss tangent (Df) are measured by determining the resonant frequencies before and after insertion of the substrate under test. The resonator used is an apparatus compliant with IEC-61189.

[0026] The thickness of the polycarbonate substrate or the composite plate composed of polymethyl methacrylate and polycarbonate as the substrate of the present invention is preferably 0.4 mm to 2.0 mm. This is because if the thickness of the supporting substrate is less than 0.4 mm, the durability of the laminate may be affected, and if it exceeds 2.0 mm, the processability and transparency of the substrate may be affected. In addition, the thickness of the substrate also affects the dielectric properties, but if it is within this thickness range, it affects the dielectric loss of the frame laminate. It will not exceed 0.02. Since the surface hardness of the polycarbonate substrate is relatively low, it is preferable to thicken the coating layer in order to achieve the desired steel wool resistance. However, by using a composite plate substrate composed of polymethyl methacrylate and polycarbonate having relatively high surface hardness, a laminate with excellent steel wool resistance and impact resistance can be obtained even with a thin coating layer.

[0027] The housing of mobile communication devices, such as mobile phones, has many external contacts, so abrasion resistance is required. As an evaluation, steel wool resistance is required. Specifically, #0000 steel wool is subjected to a pressure of 1.5 kg / cm 2 After the load has been reciprocated 300 times, visual inspection is required to ensure that no scratches are found.

[0028] The coating layer is a cured product of the following photocurable resin composition: The photocurable resin composition forming the coating layer preferably comprises (a) a photocurable compound, (b) a photopolymerization initiator, and (c) a solvent.

[0029] Furthermore, the photocurable compound of the component (a) preferably contains a photocurable multifunctional monomer represented by the following formula (1) or (2) as an essential component.

[0030]

[0031] By including (1) and (2), the crosslinking density during curing becomes higher, and as a result, the steel wool resistance can be satisfied. When (1) or (2) is not included, the crosslinking density during curing is insufficient, and it is difficult to satisfy the steel wool resistance, which is not preferred.

[0032] The number of moles of acryloyl groups per 100g of the photocurable compound of component (a) is preferably in the range of 0.8 to 1.1, more preferably 0.9 to 1.1, and more preferably 0.95 to 1.05. If the number of moles of acryloyl groups is less than 0.8, the crosslinking density may be reduced, thereby degrading the scratch resistance. Conversely, if the number of moles of acryloyl groups is greater than 1.1, shrinkage during curing may cause cracks due to excessive stress, resulting in poor appearance.

[0033] The above-mentioned number of moles of acryloyl groups per 100 g represents the number of moles of acryloyl groups per 100 g of each component of the photocurable compound (number of acryloyl functional groups / molecular weight g·mol -1 )

[0034] The photocurable compound of component (a) preferably contains 3 or more (meth)acryloyl groups in its molecule at 75% by weight or more. If the content is less than 75% by weight, the crosslinking density is low, making it difficult to achieve satisfactory steel wool resistance.

[0035] Examples of the compound having three or more (meth)acryloyl groups in the molecule include pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, trimethylolpropane triacrylate, dimethylolpropane tetraacrylate, trimethylolpropane ethylene oxide-modified triacrylate, trimethylolpropane propylene oxide-modified triacrylate, pentaerythritol ethylene oxide-modified tetraacrylate, dipentaerythritol ethylene oxide-modified pentaacrylate, dipentaerythritol ethylene oxide-modified hexaacrylate, and tris(2-acryloyloxyethyl)isocyanurate.

[0036] The number of moles of hydroxyl groups per 100g of the photocurable compound of component (a) is preferably in the range of 0.06 to 0.20, more preferably 0.07 to 0.15, and more preferably 0.08 to 0.12. If this range is not met, the elastic modulus may decrease, and the desired steel wool resistance may not be achieved. Conversely, even if the content exceeds this range, no further improvement can be expected.

[0037] The above-mentioned number of moles of hydroxyl groups per 100 g represents the number of hydroxyl groups of each component per 100 g of the photocurable compound (number of hydroxyl groups / molecular weight g·mol -1 )

[0038] Examples of the hydroxyl group-containing (meth)acrylate include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, 2-hydroxy-3-phenoxypropyl (meth)acrylate, 2-(meth)acryloyloxyethyl-2-hydroxyethyl phthalate, glycerol di(meth)acrylate, 2-hydroxy-3-(meth)acryloyloxypropyl (meth)acrylate, pentaerythritol triacrylate, and dipentaerythritol pentaacrylate. Among these, trifunctional or higher-functional hydroxyl group-containing (meth)acrylates are preferred.

[0039] The photocurable compound of the component (a) may contain two or less acrylates in the molecule in order to adjust the number of moles of acryloyl groups and the number of moles of hydroxyl groups per 100 g.

[0040] Specific examples of the compound containing two or less acrylates in the molecule include 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1,9-nonanediol di(meth)acrylate, tetraethylene glycol dimethacrylate, and dicyclopentyldimethylol di(meth)acrylate.

[0041] The photocurable compound of the component (a) may contain urethane-modified (meth)acrylates or ethylene oxide-modified (meth)acrylates, which are effective in suppressing cracks caused by shrinkage during curing.

[0042] Examples of the photopolymerization initiator (b) of the photocurable resin composition include benzoins such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, and benzoin isobutyl ether; and acetophenones such as acetophenone, 2,2-diethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 1,1-dichloroacetophenone, 2-hydroxy-2-methyl-phenylpropane-1-one, diethoxyacetophenone, 1-hydroxycyclohexylphenyl ketone, and 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropane-1-one. anthraquinones such as 2-ethylanthraquinone, 2-tert-butylanthraquinone, 2-chloroanthraquinone, and 2-amylanthraquinone; thioxanthones such as 2,4-diethylthioxanthone, 2-isopropylthioxanthone, and 2-chlorothioxanthone; ketals such as acetophenone dimethyl ketal and benzil dimethyl ketal; benzophenones such as benzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, and 4,4'-dimethylaminobenzophenone; phosphine oxides such as 2,4,6-trimethylbenzoyldiphenylphosphine oxide and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, etc.

[0043] These components (b) may be used alone or as a mixture of two or more, and may be used in combination with accelerators such as tertiary amines such as triethanolamine and methyldiethanolamine, and benzoic acid derivatives such as ethyl N,N-dimethylaminobenzoate and isoamyl N,N-dimethylaminobenzoate.

[0044] The amount of the photopolymerization initiator (component (b)) used is preferably 0.1 to 20 wt %, more preferably 1 to 10 wt %, relative to a total of 100 wt % of component (a). If this range is not met, crosslinking may be insufficient, resulting in a decrease in elastic modulus and failure to achieve the desired steel wool resistance. Conversely, even if the amount exceeds this range, further improvement in the reaction rate may not be expected.

[0045] As the solvent for component (c), known organic solvents may be used, such as aromatic organic solvents such as toluene and xylene; ketone organic solvents such as methyl ethyl ketone and methyl isobutyl ketone; ester organic solvents such as ethyl acetate, n-propyl acetate, isopropyl acetate, and isobutyl acetate; alcohol organic solvents such as methanol, ethanol, n-propanol, isopropyl alcohol, and n-butanol; and glycol ether organic solvents such as propylene glycol monomethyl ether. In particular, a glycol organic solvent is preferably contained.

[0046] Examples of the glycol ether organic solvent include ethylene glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol n-propyl ether, ethylene glycol monoisopropyl ether, ethylene glycol dipropyl ether, ethylene glycol monobutyl ether, ethylene glycol monoisobutyl ether, ethylene glycol dibutyl ether, ethylene glycol isopentyl ether, ethylene glycol monohexyl ether, ethylene glycol mono-2-ethylhexyl ether, methoxyethoxyethanol, and ethylene glycol monoallyl ether; and propylene glycols such as propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, and butoxypropanol. Among these, propylene glycol monomethyl ether is preferred.

[0047] The thickness of the coating layer is preferably 1 to 30 μm. More preferably, it is 5 μm to 20 μm. If it is less than 1 μm, it is easily affected by the supporting substrate and the desired steel wool resistance may not be obtained. On the contrary, if it exceeds this range, cracks may be generated due to excessive stress due to shrinkage during curing, which may cause poor appearance. In addition, if it is within this range, the dielectric loss of the frame laminate is affected. It will not exceed 0.02.

[0048] Various additives may be added to the photocurable resin composition without departing from the purpose of the present invention. Examples of the various additives include organic / inorganic fillers, slip agents, plasticizers, flame retardants, heat stabilizers, antioxidants, light stabilizers, ultraviolet absorbers, lubricants, antistatic agents, release agents, foaming agents, nucleating agents, colorants, crosslinking agents, dispersing aids, and resin components.

[0049] The photocurable resin composition can be cured by irradiating ultraviolet rays with a wavelength of 10 to 400 nm or visible light with a wavelength of 400 to 700 nm. The wavelength of the light used is not particularly limited, and near-ultraviolet rays with a wavelength of 200 to 400 nm are particularly preferably used. Examples of the lamp used as the ultraviolet light generating source include low-pressure mercury lamps (output power: 0.4 to 4 W / cm), high-pressure mercury lamps (40 to 160 W / cm), ultra-high-pressure mercury lamps (173 to 435 W / cm), and metal halide lamps (80 to 160 W / cm).

[0050] As a method for obtaining a coating film by light irradiation, either an oxygen-barrier atmosphere or an atmospheric atmosphere can be used. Even if the composition of the present invention is polymerized and cured in an atmospheric atmosphere, it can also provide a good coating. For example, cast film, roll coating, rod coating, spray coating, air knife coating, spin coating, flow coating, curtain coating and dipping can be mentioned. It should be noted that the coating film thickness is adjusted by solid content concentration in consideration of the film thickness after drying and curing.

[0051] Example

[0052] Hereinafter, the present invention will be specifically described based on Examples and Comparative Examples, but the present invention is not limited to the following Examples.

[0053] (Reference Example 1) <Preparation of Photocurable Resin Composition A1 for Coating Film>

[0054] 60 parts by weight of dipentaerythritol hexaacrylate: Mw = 578.57, number of acryloyl groups = 6, number of hydroxyl groups = 0 (containing 35% of dipentaerythritol pentaacrylate: Mw = 524.52, number of acryloyl groups = 5, number of hydroxyl groups = 1) (manufactured by Kyoeisha Chemical Co., Ltd., product name DPHA), 20 parts by weight of pentaerythritol triacrylate: Mw = 298.29, number of acryloyl groups = 3, number of hydroxyl groups = 1 (containing 40% of pentaerythritol tetraacrylate: Mw = 352.34, number of acryloyl groups = 4, number of hydroxyl groups = 0) (manufactured by Kyoeisha Chemical Co., Ltd., Light Acrylate PE-3A), and 20 parts by weight of trimethylolpropane triacrylate: Mw = 296.32, number of acryloyl groups = 3, number of hydroxyl groups = 0 (manufactured by Kyoeisha Chemical Co., Ltd., Light Acrylate The following was prepared by mixing 20 parts by weight of TMP-A) with 8 parts by weight of 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one (Omnirad 907 manufactured by IGM Resins B.V.) as a photopolymerization initiator. The amount of propylene glycol monomethyl ether as an organic solvent was adjusted to 40% of the solid content to obtain a photocurable resin composition A1 for a coating film. In composition A1, the number of moles of acryloyl groups per 100 g of the photocurable compound is {[(6 / 578.57×0.65)+(5 / 524.52×0.35)]×0.6+[(4 / 352.34×0.4)+(3 / 298.29×0.6)]×0.2+(3 / 296.32)×0.2}×100=1.02. Similarly, the number of moles of hydroxyl groups per 100 g of the photocurable compound is [(1 / 524.52×0.35)×0.6+(1 / 298.29×0.6)×0.2]×100=0.08. Note that, among the components of the photocurable compound, the ratio of trifunctional or higher-functional (meth)acryloyl groups is 100%.

[0055] (Reference Examples 2 to 4 and Comparative Reference Examples 1 to 4)

[0056] Photocurable resin compositions A2 to A4 and B1 to B4 for coating films were obtained by the same procedure as in Reference Example 1 except that the raw materials and composition ratios described in Table 1 were used.

[0057] It should be noted that other abbreviations in the table are as follows.

[0058] PE-4A: Pentaerythritol tetraacrylate, Mw = 352.34, number of acryloyl groups = 4 (manufactured by Kyoeisha Chemical Co., Ltd.)

[0059] DCPA: dimethylol-tricyclodecane diacrylate, Mw = 304.39, number of acryloyl groups = 2 (manufactured by Kyoeisha Chemical Co., Ltd.)

[0060] G201P: 2-hydroxy-3-acryloyloxypropyl methacrylate, Mw = 214.22, number of (meth)acryloyl groups = 2, number of hydroxyl groups = 1 (manufactured by Kyoeisha Chemical Co., Ltd.)

[0061] TMP-6EO-3A: 6EO-modified trimethylolpropane triacrylate, Mw = 560.64, number of acryloyl groups = 3 (manufactured by Kyoeisha Chemical Co., Ltd.)

[0062] EBECRYL 210: aromatic urethane acrylate, Mw = 1500, number of acryloyl groups = 2 (manufactured by DAICEL-ALLNEX)

[0063] The number of moles of acryloyl groups per 100 g of the photocurable compound = the number of moles of acryloyl groups of each component per 100 g of the photocurable compound (number of acryloyl functional groups / molecular weight g·mol -1 )

[0064] The number of moles of hydroxyl groups per 100 g of the photocurable compound = the number of hydroxyl groups of each component per 100 g of the photocurable compound (number of hydroxyl groups / molecular weight g·mol -1 )

[0065] (Examples 1 and 2) <Production of Laminated Bodies S1 and S2 for Frames>

[0066] The photocurable resin composition A1 was applied to a polycarbonate substrate (thickness 0.54 mm, length 10 cm, width 10 cm, manufactured by Escarbo Sheet Co., Ltd.) by spin coating so that the film thickness after drying was 10 μm (S1) and 20 μm (S2). The film was dried at 80°C for 5 minutes and then cooled at room temperature for 5 minutes. Thereafter, the film was heated at 2 kW / cm2 in an oxygen atmosphere. 2 High pressure mercury lamp, with 2800mJ / cm 2 Films were formed by cumulative exposure (365 nm conversion) to obtain frame-forming laminates S1 and S2, respectively.

[0067] (Examples 9 and 10) <Production of Laminated Bodies T1 and T2 for Frames>

[0068] The photocurable resin composition A1 was applied by spin coating on the polymethyl methacrylate side of a polymethyl methacrylate / polycarbonate composite plate (thickness 650 μm, length 10 cm, width 10 cm, manufactured by Escarbo Sheet Co., Ltd.) so that the film thickness after drying would be 10 μm (T1) and 20 μm (T2). The film was dried at 80°C for 5 minutes and then cooled at room temperature for 5 minutes. Thereafter, the film was heated at 2 kW / cm2 in an oxygen atmosphere. 2 High pressure mercury lamp, with 2800mJ / cm 2Films were formed by cumulative exposure (365 nm conversion) to obtain laminated bodies T1 and T2 for frames, respectively.

[0069] (Examples 3 to 8)

[0070] <Production of Laminated Bodies S3 to S8>

[0071] Except having used the photocurable resin compositions A2 to A4 blended in the composition ratio shown in Table 1, the same procedures as in Examples 1 and 2 were carried out to produce laminated bodies S3 to S8 for frames.

[0072] (Examples 11-12)

[0073] <Production of Laminated Bodies T3 and T4>

[0074] Except having used the photocurable resin composition A2 mix|blended with the composition ratio of Table 1, it carried out similarly to Example 9, 10 and produced the laminated bodies T3 and T4 for frames.

[0075] (Comparative Examples 1, 2, and 3)

[0076] Diamond glass (reinforced product, manufactured by Corning) without a coating layer, polycarbonate without a coating layer, and a polymethyl methacrylate / polycarbonate composite plate without a coating layer were used as Comparative Examples 1, 2, and 3, respectively.

[0077] (Comparative Examples 4 to 11)

[0078] Except having used the photocurable resin compositions B1 to B4 blended in the composition ratio shown in Table 1, the same procedures as in Examples 9 and 10 were carried out to produce laminated bodies U1 to U8 for frames.

[0079] <Evaluation>

[0080] The following evaluations were conducted using the frame laminates S1 to S8 (Examples) and T1 to T4 (Examples) obtained above, uncoated diamond glass, uncoated polycarbonate, and uncoated polymethyl methacrylate / polycarbonate composite sheets (Comparative Examples), as well as frame laminates U1 to U8 (Comparative Examples). The evaluation results are shown in Tables 2 and 3.

[0081] Steel wool resistance

[0082] A reciprocating abrasion tester (model: 30S, manufactured by HEIDON) was used with #0000 steel wool at a load of 1.5 kg / cm 2 The surface of the coating layer was abraded back and forth 300 times. A scratch of 1 mm or longer was considered a scratch. The presence of scratches was visually observed under a fluorescent light, and the number of scratches was evaluated according to the following criteria.

[0083] ○: No scars

[0084] △: There are less than 10 scars

[0085] ×: There are more than 10 scars

[0086] <Dielectric loss tangent Df, relative dielectric constant Dk, >

[0087] For samples that were left to stand for more than 24 hours in an atmosphere of 23°C and 50% RH, the dielectric loss tangent Df and relative dielectric constant Dk at frequencies of 5 GHz and 10 GHz were measured using a Network Analyzer E8363C (trade name: Agilent Technologies) at 23°C by the split dielectric resonator method. Furthermore, the obtained values ​​were used to calculate

[0088] [Table 1]

[0089]

[0090]

[0091]

Claims

1. A laminate for a frame, characterized in that: A laminate for a frame body having a coating layer on a polycarbonate substrate or a composite plate substrate composed of polymethyl methacrylate and polycarbonate, wherein the coating layer is a cured product of a photocurable resin composition, the composition comprising (a) a photocurable compound, (b) a photopolymerization initiator, and (c) a solvent, the photocurable compound comprising a photocurable multifunctional monomer represented by the following formula (1) or (2) as an essential component, the number of moles of acryloyl groups per 100 g of the photocurable compound being 0.8 to 1.1, and the laminate meeting the following conditions 1 and 2: Condition 1: The relationship between the relative dielectric constant Dk and the dielectric loss tangent Df measured by the split dielectric resonator method in the frequency band above 5 GHz satisfies the following equation: Condition 2: Make #0000 steel wool at 1.5kg / cm 2 After the load was passed back and forth on the coating layer 300 times, no scratches were found visually.

2. The frame laminate according to claim 1, wherein The thickness of the polycarbonate substrate or the substrate as a composite plate composed of polymethyl methacrylate and polycarbonate is 0.4 to 2.0 mm.

3. The frame laminate according to claim 1 or 2, wherein: 75% by mass or more of the photocurable compound has three or more (meth)acryloyl groups in the molecule.

4. The frame laminate according to claim 1 or 2, wherein The number of moles of hydroxyl groups per 100 g of the photocurable compound is 0.06 to 0.

2.

5. The frame laminate according to claim 1 or 2, wherein The thickness of the coating layer is 1 to 30 μm.

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