JP2006035778A - Impact-resistant resin laminated sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an impact-resistant resin laminated sheet of low reflectance, excellent in adhesion properties, transparency, and surface hardness properties. <P>SOLUTION: This impact-resistant resin laminated sheet is constituted by forming hard coat layers (D) on both sides of a base sheet (C) which is made by providing an acrylic resin layer (B) on one side of a polycarbonate resin layer (A), and further by forming antireflection layers (E) over both surfaces of the hard coat layers (D). <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an impact-resistant resin laminate, and more particularly to an impact-resistant resin laminate that has low reflectivity and excellent adhesion, transparency, and surface hardness. The highly transparent and high hardness impact-resistant resin laminate of the present invention is useful as a protective plate for displays, in particular, as a protective transparent resin plate for liquid crystals, organic EL displays and the like of portable terminal devices.

Mobile devices such as mobile phones, digital still cameras, and handy cams have made great progress, and a display such as a small liquid crystal has come to be equipped as a standard display device. For the purpose of protection, an acrylic plate or a polycarbonate plate subjected to a hard coat treatment is mounted on this display.
Further, such portable devices are remarkably light and thin, and the above acrylic resin plate is desired to have a thickness of 1 mm or less. However, since the strength against impact decreases as the plate thickness decreases, it is necessary to consider damage. From the point of impact resistance, the polycarbonate plate is generally an effective material, but since the surface hardness of the base material itself is low, the surface hardness is the pencil hardness and HB is the limit even if the hard coat treatment is performed directly. Actually, the use of the above-described display device is limited. Accordingly, a protective plate for a portable device display is required to have a high transparency, a thin impact wall, a high impact strength, hardly break, and a high surface hardness (generally 3H or more in pencil hardness) to prevent damage.

Patent Document 1 includes an acrylic resin layer in which rubber particles are dispersed in methacrylic resin, and a scratch-resistant film obtained by curing a curable coating is formed on the surface of an acrylic resin film having a thickness of 100 to 1800 μm. A scratch-resistant acrylic resin film characterized by being formed is disclosed.
In Patent Document 2, a scattering prevention film is affixed to one surface of a tempered glass plate mainly composed of silicon dioxide, and a film on which characters or patterns are printed is affixed to the same or the other surface. A protective plate for a portable display device is disclosed.

JP 2004-143365 A JP 2003-140558 A

However, since the acrylic resin plate described in Patent Document 1 generally has low impact resistance, there is an essential problem that it is easily damaged or damaged by an external impact or load. Further, the tempered glass plate mainly composed of silicon dioxide described in Patent Document 2 has improved impact resistance, flexural strength, and rigidity as compared with the acrylic resin plate, but it is protected for portable display devices. When used for the purpose of a plate, it may still be insufficient in terms of weight reduction and rigidity.
That is, as a protective plate for a display device or the like, a high-hardness plate is easily damaged, while a hard-to-break plate has a low hardness and insufficient scratch resistance.
The present invention solves the above problems, and has an impact-resistant resin laminate having low reflectivity and excellent adhesion, transparency and surface hardness, and a portable device display device using the impact-resistant resin laminate. The purpose is to provide a protective plate.

  In view of the above circumstances, the inventors of the present invention form a hard coat layer that is less susceptible to cracking upon impact on both sides of a base sheet provided with a high-hardness acrylic resin layer on one side of a polycarbonate resin layer having excellent impact resistance. Further, by adopting a laminated structure in which an antireflection layer is formed on both sides of the hard coat layer, a resin laminated board having low impact, excellent adhesion, transparency and surface hardness, and having impact resistance. And the present invention was completed.

That is, in the present invention, the hard coat layer (D) is formed on both sides of the base sheet (C) provided with the acrylic resin layer (B) on one side of the polycarbonate resin layer (A), and the hard coat layer ( It is an invention relating to an impact-resistant resin laminate in which an antireflection layer (E) is formed on both sides of D).
In the impact-resistant resin laminate of the present invention, it is desirable to further make the following aspects.
(1) The thickness of the polycarbonate resin layer (A) is in the range of 0.3 to 1.2 mm, and the thickness of the acrylic resin layer (B) is in the range of 40 to 100 μm.
(2) The hard coat layer (D) is a layer formed by ultraviolet curing a reaction liquid mainly composed of a urethane acrylate monomer and / or an oligomer;
(3) The antireflection layer (E) is formed by a vacuum vapor deposition method or a wet coating method, and the antireflection layer (E) on the hard coat layer (D) on the acrylic resin layer (B) side is defined as an incident light side. The luminous reflectance is 2% or less

  The present invention further relates to a protective plate for a portable device display device which is made of the above-described impact-resistant resin laminate and is transparent and has high hardness.

The impact-resistant resin laminate of the present invention has low visible light reflectivity, excellent transparency and adhesion, and high surface hardness, so it has scratch resistance, and is also excellent in impact resistance. In the case of an impact-resistant acrylic board mixed with a rubber component such as butadiene, the impacted portion will be whitened without cracking due to the impact, or the refractive index difference between the rubber component and the acrylic component may be high in a high-temperature environment. However, the impact-resistant resin laminate of the present invention does not cause such a problem. In addition, the impact resistance is improved as compared with a synthetic resin film having a norbornene skeleton and excellent in transparency. Furthermore, surface flexibility, which is a drawback of polycarbonate, has also been solved. In addition, in the impact-resistant resin laminate of the present invention, the linear expansion coefficient of the acrylic resin layer provided on one side of the polycarbonate resin layer is substantially the same as that of polycarbonate, and the polycarbonate resin layer (A) and the acrylic resin layer ( Since the hard coat layer (D) is formed on both surfaces of the base material sheet (C) made of B), it has a characteristic that does not cause warping or bending at the time of temperature change, and an optical material conventionally used In comparison, it became possible to greatly improve not only the general characteristics but also the problems of cracks and impact damage marks.
The highly transparent and high hardness impact-resistant resin laminate of the present invention is useful as a protective plate for a display, a transparent resin plate for protecting a liquid crystal of a portable terminal device, an organic EL display, etc., especially as a protective plate for a portable display device. Useful.

The present invention is described in detail below.
The impact-resistant resin laminate of the present invention has a hard coat layer (D) formed on both sides of a base sheet (C) provided with an acrylic resin layer (B) on one side of a polycarbonate resin layer (A), and An antireflection layer (E) is formed on both outer surfaces of the hard coat layer (D).

[Polycarbonate resin layer (A)]
As the polycarbonate resin used for the polycarbonate resin layer (A) constituting the substrate layer in the present invention, for example, a known polymer used by forming a film or sheet from a polymer mainly composed of bisphenol A is used. Is possible.
The molecular weight of the polycarbonate resin is not particularly limited, but those having a viscosity average molecular weight of about 15,000 to 30,000 capable of forming a sheet by ordinary extrusion molding are preferable. Various additives generally used for sheets, films and the like, for example, ultraviolet absorbers, antioxidants, anti-coloring agents, coloring agents and the like can be added to the polycarbonate resin. A method for forming the sheet shape will be described later.

[Acrylic resin layer (B)]
As the acrylic resin constituting the acrylic resin layer (B), a copolymer of a known film or sheet molding material, methyl methacrylate, and other monomers such as methyl acrylate or ethyl acrylate can be used. The methyl methacrylate is preferably 75 to 99 mol%, and methyl or ethyl acrylate is preferably 1 to 25 mol%. The molecular weight of the acrylic resin is preferably about 3 to 350,000 in terms of weight average molecular weight. The acrylic resin production method is generally roughly classified into an emulsion polymerization method, a suspension polymerization method, and a continuous polymerization method, and the acrylic resin used in the present invention is preferably a resin produced by a continuous polymerization method.

[Base sheet (C)]
The polycarbonate resin layer (A) is preferably formed with a roll having a mirror surface by extruding polycarbonate resin pellets in a film form with an extruder. As a method of providing the acrylic resin layer (B) on one side of the polycarbonate resin layer (A), a method of co-extrusion so that the acrylic resin layer is formed on the surface layer in the mold part of the extruder, a pre-molded polycarbonate resin layer Examples thereof include a method of thermocompression bonding of the acrylic resin layer, a method of obtaining a dry film by coating a polycarbonate resin layer with a solution in which an acrylic resin is dissolved.
The thickness of the polycarbonate resin layer (A) is preferably 0.3 to 1.2 mm, particularly preferably 0.4 to 1.0 mm. The impact resistance can be improved by setting the thickness of the polycarbonate resin layer (A) to 0.3 mm or more. On the other hand, if the thickness is usually 1.2 mm for the purpose of using a protective plate for a display device, etc. The impact resistance function is fully satisfied.
The thickness of the acrylic resin layer (B) is preferably 40 to 100 μm, particularly preferably 50 to 80 μm. The surface hardness can be improved by setting the thickness of the acrylic resin layer (B) to 40 μm or more. On the other hand, if the thickness is 100 μm, the normally required surface hardness function is satisfied.

[Hard coat layer (D)]
In this invention, a hard-coat layer (D) is formed on both surfaces of the base material sheet (C) which consists of the said polycarbonate resin layer (A) and an acrylic resin layer (B). The hard coat here has a pencil hardness (based on JIS K 5400) of preferably 3H or more, and more preferably 4H or more.
The hard coat layer (D) is mainly for the purpose of increasing the scratch resistance of the surface of the base sheet, but when the hard coat layer is provided only on one surface, there is a risk of warping or bending due to temperature changes. Therefore, it is necessary to provide on both sides. The component constituting the hard coat layer (D) is not particularly limited, but a reaction such as polymerization, copolymerization or modification of a (meth) acrylate-containing compound having at least one (meth) acryloyl group in one molecule is performed. It is possible to use a resin obtained by mixing them.

As the (meth) acrylate-containing compound having at least one (meth) acryloyl group in one molecule, it is preferable to use a compound mainly composed of a urethane acrylate monomer and / or an oligomer. As the urethane acrylate monomer, phenyl glycidyl ether (meth) acrylate hexamethylene diisocyanate urethane prepolymer, phenyl glycidyl ether (meth) acrylate isophorone diisocyanate urethane prepolymer, phenyl glycidyl ether (meth) acrylate tolylene diisocyanate urethane prepolymer; Glycerin di (meth) acrylate tolylene diisocyanate urethane oligomer, pentaerythritol tri (meth) acrylate hexamethylene diisocyanate urethane oligomer, glycerin di (meth) acrylate isophorone diisocyanate urethane oligomer, pentaerythritol tri (meth) acrylate tolylene diiso A sulfonates urethane oligomer, although pentaerythritol tri (meth) acrylate isophorone diisocyanate urethane oligomer, and the like, may be used these monomers or oligomers alone or may be used in combination of two or more. When a polyfunctional urethane acrylate oligomer is used, brittleness can be avoided by the effect of the urethane bond part, although a coating layer having a high crosslink density and high hardness can be obtained. Even when an oligomer having hexafunctionality is used as the urethane acrylate, a coat layer having appropriate toughness is obtained, which acts more effectively for the purpose of the present invention than the silica-based one.
Polyfunctional (meth) acrylate-containing compounds other than the urethane acrylate monomers and / or oligomers described above can also be used. Specific examples thereof include pentaerythritol tri (meth) acrylate, dipentaerythritol tri (meth) ) Acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, trimethylolpropane tri (meth) acrylate, n-butyl (meth) acrylate, polyester (meth) acrylate, lauryl (meth) acrylate, Examples thereof include hydroxyethyl (meth) acrylate. These monomers may be used alone or in combination of two or more.

The hard coat layer (D) is, for example, coated on a base sheet (C) composed of a polycarbonate resin layer (A) and an acrylic resin layer (B) in the presence of a solvent and a polymerization initiator to cause a crosslinking reaction. This method can be used. The use of an organic solvent that can also be used for dilution at the time of coating is effective from the viewpoint of improving the adhesion surface with the substrate sheet. Examples of the organic solvent include aromatic solvents such as toluene and xylene, acetate esters such as ethyl acetate and butyl acetate, and ketones such as methyl ethyl ketone and methyl isobutyl ketone.
The method for coating the resin composition containing the above components is not particularly limited, such as dip coating, die coater, roll coater, etc., but dip coating can be used effectively from the viewpoint of appearance quality and film thickness control. After applying the coating liquid, it is cured by energy such as ultraviolet rays and heat to form a film. At this time, it is desirable to select ultraviolet curing as the curing method. If necessary, an appropriate polymerization initiator is added to the coating composition. Examples of the polymerization initiator include benzophenone-based, benzyldimethyl ketal, alkylphenone-based, and acylphosphine oxide in the ultraviolet curing type.
In order to give the hard coat layer (D) functions of high hardness scratch resistance and hard coat layer cracking, it is generally preferable to reduce the thickness of the hard coat layer. Although the thickness of a hard-coat layer (D) is suitably selected according to a use, it is 0.5-10 micrometers normally, Preferably it is 1-6 micrometers. By setting the thickness of the hard coat layer to 0.5 μm or more, the scratch resistance is improved as the surface hardness is improved. In addition, by setting the thickness to 10 μm or less, it is possible to effectively prevent the crack from propagating through the hard coat layer to the base sheet when receiving an impact, and the cured film becomes brittle and cracks are generated. Can be prevented. Although it is possible to form the hard coat layer with a silica-based thermosetting resin, the brittleness when using the silica-based resin can be improved by using a urethane acrylate-based resin.

[Antireflection layer (E)]
In the present invention, antireflection layers (E) are provided on both outer sides of the hard coat layer (D). The anti-reflective layer (E) not only has low light reflectance and high transmittance, but also has excellent impact resistance, adhesion, heat resistance, wear resistance and chemical resistance on the laminate, and productivity is also high. It needs to be good.
The antireflection layer (E) can be formed by a vacuum deposition method, a sputtering method, a wet coating method, or the like, but in the present invention, the vacuum deposition method or the wet coating method is preferable so as not to impair the impact resistance of the base sheet. . The vacuum deposition method has good impact resistance despite the fact that the film is porous and the material hardness is high, and the wet coating method uses an organic material, so it has excellent stretchability and the characteristics of the base sheet. Is preferable because it does not lower the thickness.
(1) Wet coating method The antireflection layer in the wet coating method has a laminated structure in which, for example, a high refractive index film containing TiO ₂ particles or the like and a low refractive index film containing SiO ₂ particles or the like are alternately laminated. It is desirable to do. If it does in this way, reflection can be prevented effectively by optical interference action.
As particles dispersed in a low refractive index (refractive index n is about 1.35 to 1.7) film, MgO (n: 1.7), Al ₂ O ₃ (n: 1.65), SiO ₂ (n: 1.45) and the like, and it is preferable to use silica sol, which is a dispersion of SiO ₂ fine particles, as the coating solution. Such a silica sol can be prepared by using an alkoxysilane with a basic catalyst. For example, while stirring a mixed solution composed of water and an organic solvent, alkoxysilane and a basic catalyst are added, and polycondensation of alkoxysilane, particularly hydrolysis, is performed at a temperature below the boiling point of the organic solvent. It is practically desirable that the average particle diameter of the SiO ₂ particles thus obtained is in the range of 5 to 100 nm.

  A sol fine particle in which fine particles for a high refractive index film are dispersed as a coating solution is a partial hydrolyzate of an acetylaceto sodium chelate compound and a metal alkoxide whose polymer chain ends are sealed with diols. The acetylacetosodium chelate compound is a chelate compound having acetylacetone as a ligand. Examples of the metal alkoxide include tetrabutoxyzirconium and tetraisopropoxytitanium. The component for forming a high refractive index film is prepared by mixing and stirring an acetylacetosodium chelate compound and metal alkoxide as described above and an organic solvent, and further adding water and a catalyst to cause partial hydrolysis. The partial hydrolysis reaction between such an acetylacetosodium chelate compound and a metal alkoxide is usually preferably at a temperature of 100 ° C. or lower, and usually preferably heated for about 0.5 to 20 hours. The average particle size of the particles thus obtained is desirably 5 to 100 nm. The thickness of each layer thus obtained is preferably about 50 to 200 nm.

(2) Vacuum deposition method Vacuum deposition is a method in which the deposition source is heated by an electron beam to form the antireflection layer (E).
In order to obtain an antireflection layer having a good antireflection effect, an SiO ₂ layer as a low refractive index layer, or a mixed layer of SiO ₂ and Al ₂ O ₃ , an Nb ₂ O ₅ layer or a TiO ₂ layer as a high refractive index layer Etc. are preferable.
As the vacuum deposition method, after evacuating the vacuum chamber of the vacuum deposition apparatus, an antireflection film is formed on the hard coat layer (D) facing the deposition source by an arbitrary deposition condition by the electron beam heating deposition method. Form. For example, as a vapor deposition source, TiO _x (0 <x <2) can be used for the first layer and SiO ₂ can be used for the second layer, but these can be alternately laminated. In this case, the refractive index of titanium dioxide is 2.25, and the refractive index of silicon dioxide is 1.47. The film thickness (geometric film thickness) of each layer thus obtained is not particularly limited, but can be about 100 to 1200 angstroms (A).

[Visibility reflectance]
The luminous reflectance is measured by using a spectrophotometer or the like to measure the luminous reflectance with the antireflection layer (E) on the hard coat layer (D) on the acrylic resin layer (B) side as the incident light side. Is required.
The impact-resistant resin laminate of the present invention requires an antireflection layer when used as a protective plate for a display. In this case, the luminous reflectance in the antireflection layer (E) is practically 2% or less. It is desirable to do.

  In the impact-resistant resin laminate of the present invention, the total light transmittance of the impact-resistant resin laminate can be 95% or more by using the above-described materials for each layer. The total light transmittance can be evaluated based on JIS K 7105 using a turbidimeter (for example, Nippon Denshoku Industries Co., Ltd., model: NDH2000).

The impact-resistant resin laminate of the present invention thus obtained has hard coat layers (D) on both sides of the base sheet (C) provided with the acrylic resin layer (B) on one side of the polycarbonate resin layer (A). ) And an antireflection layer (E) formed on both outer sides of the hard coat layer (D), that is, an antireflection layer (E) / hard coat layer (D) / polycarbonate resin layer. It is a multilayer laminate in which (A) / acrylic resin layer (B) / hard coat layer (D) / antireflection layer (E) are laminated in this order. By adopting such a layer structure, which is a feature of the present invention, it has been impossible in the past, low reflectance, excellent adhesion, transparency and surface hardness, and further excellent impact resistance, For the first time, it has become possible to have the functions required for the protective plate of the display in a balanced manner.
The impact-resistant resin laminate of the present invention thus obtained is extremely useful for a protective plate for a display, particularly a protective transparent resin plate for a liquid crystal, an organic EL display, etc. of a portable terminal device.

The present invention is illustrated by the following examples, but the present invention is not limited to these examples.
In addition, the measurement and evaluation in an Example were performed as follows.
(1) 20mmφ hard ball drop test Fixing the periphery of the base material cut into 5cm square, and steel ball of 20mmφ (32.6g) from the height of 10, 20, 30, 40, 50cm respectively to the center part is naturally dropped It was made to evaluate whether a crack or a crack entered.
The display of evaluation in Table 1 is as follows.
○: No cracks or cracks occurred. Δ: The surface was whitened. X: Cracking occurred.
(2) Surface hardness It evaluated by the pencil hardness based on JISK5400.
(3) Total light transmittance Based on JISK7105, the total light transmittance was measured using the turbidimeter (Nippon Denshoku Industries Co., Ltd. make, model: NDH2000).
(4) Luminous reflectance Using a spectrophotometer, luminous reflectance was measured with the antireflection layer (E) on the hard coat layer (D) on the acrylic resin layer (B) side as the incident light side. .

The impact-resistant resin laminate was produced by the following method, and the obtained laminate was evaluated.
1. Manufacture of impact-resistant resin laminate (1) Molding of base material sheet (C) consisting of polycarbonate resin layer (A) and acrylic resin layer (B) Polycarbonate resin pellets (manufactured by Teijin Chemicals Ltd., trade name: Panlite) ), A 0.8 mm thick sheet is formed by extrusion molding, and acrylic resin pellets (trade name: Acrypet V, manufactured by Mitsubishi Rayon Co., Ltd.) are used to extrude 0.08 mm thick by extrusion molding. A film was formed. Next, these films and sheets were pressed at a temperature of 180 ° C. to obtain a base sheet (C) having a thickness of 0.88 mm.
(2) Formation of hard coat layer (D) An oligomer composition having the following composition is coated on both surfaces of the base sheet by dip coating to a thickness of 3 μm and cured by irradiating with 1000 mj / cm ² of ultraviolet rays. I let you.
Oligomer composition (a) Urethane acrylate (manufactured by Shin-Nakamura Chemical Co., Ltd., trade name: UA-100H): 38% by weight
(B) Photopolymerization initiator (manufactured by Ciba Specialty Chemicals, trade name: Irgacure 184): 2% by weight
(C) Solvent (toluene): 60% by weight
After curing, both coating surfaces on both sides of the hard coat layer had a pencil hardness of 4H and were not damaged at all even when rubbed with steel wool.
In addition, when the hard coat layer was formed, a steel ball drop test (steel ball height: 50 cm) was carried out with the hard coat layer on the acrylic resin layer (B) as the top surface, and fractures such as cracks were observed. The sheet was excellent in surface hardness.

(3) Formation of antireflection layer (E) Using a vacuum vapor deposition machine (manufactured by Syncron Co., Ltd., model: BMC-850CD1), using silicon oxide and zirconium oxide alternately so that the top layer is silicon oxide A film was formed to obtain a total of 5 antireflection layers. The luminous reflectance of this film was 0.84%.
2. Evaluation of Impact Resistant Resin Laminate For the obtained impact resistant resin laminate, the total light transmittance (antireflection layer (E ₁ ) on the hard coat layer (D) on the acrylic resin layer (B) side is incident light) The measured value of the transmittance on the side was 98% or more. Using the antireflection layer (E ₁ ) as a measurement side surface, the impact resistance and hardness of the obtained impact-resistant resin laminate were evaluated. The results are shown in Table 1.

The impact-resistant resin laminate was produced by the following method, and the obtained laminate was evaluated in the same manner as described in Example 1.
1. Production of impact-resistant resin laminate (1) Molding of base sheet (C) comprising polycarbonate resin layer (A) and acrylic resin layer (B) Polycarbonate pellets and acrylic resin pellets similar to those used in Example 1 Was used to co-extrusion so that the polycarbonate layer had a thickness of 0.94 mm and the acrylic layer had a thickness of 0.06 mm on one side, and roll-molded to obtain a sheet.
(2) Formation of hard coat layer (D) Hard coat layers were formed on both sides of the base sheet by the method described in Example 1.
(3) Formation of antireflection layer (E) A coating liquid mainly composed of a titanium alkoxide hydrolyzate is coated as a first layer, and a coating liquid mainly composed of a silica alkoxide hydrolyzate is coated as a second layer, and 80 ° C. Was baked by heating for 10 hours to obtain an antireflection layer having a luminous reflectance of 1.8%.
2. Evaluation of impact-resistant resin laminate The measured value of total light transmittance of the obtained impact-resistant resin laminate obtained in the same manner as in Example 1 was 98% or more. In the same manner as in Example 1, the impact resistance and hardness of the impact-resistant resin laminate were evaluated. The results are shown in Table 1.

[Comparative Example 1]
The same acrylic resin as used in Example 1 was extruded into a sheet using an extruder and roll-formed to obtain a base sheet having a thickness of 1 mm. Further, in Example 1. (2) A hard coat layer and an antireflection layer were formed in the same manner as described in (3).
The obtained laminated sheet was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[Comparative Examples 2 to 4]
As Comparative Example 2, rubber-containing acrylic resin (Mitsubishi Rayon Co., Ltd., trade name: Acrylite IR), Comparative Example 3 as norbornene resin (JSR Co., Ltd., trade name: Arton), and Comparative Example 4 as cyclo An olefin resin (manufactured by Nippon Zeon Co., Ltd., trade name: ZEONOR) was used as a base resin to obtain a base sheet having a thickness of 1 mm. Next, in Example 1. (2) A hard coat layer and an antireflection layer were formed by the same method as described in (3). The same evaluation as that performed in Example 1 was performed on the obtained laminated sheet. The results are shown in Table 1.
In all cases, the impact resistance value was lower than that of the impact-resistant resin laminate of the present invention.

  The impact-resistant resin laminate of the present invention can be widely used for a protective plate for a display, particularly a protective transparent resin plate for a liquid crystal, an organic EL display, etc. of a portable terminal device.

Claims (5)

  A hard coat layer (D) is formed on both sides of a base sheet (C) provided with an acrylic resin layer (B) on one side of the polycarbonate resin layer (A), and further reflected on both sides of the hard coat layer (D). An impact-resistant resin laminate having a prevention layer (E) formed thereon.   The impact-resistant resin laminate according to claim 1, wherein the polycarbonate resin layer (A) has a thickness in the range of 0.3 to 1.2 mm, and the acrylic resin layer (B) has a thickness in the range of 40 to 100 µm. Board.   The impact-resistant resin laminate according to claim 1 or 2, wherein the hard coat layer (D) is a layer formed by ultraviolet curing of a reaction liquid mainly composed of a urethane acrylate monomer and / or an oligomer.   Luminous reflection with the antireflection layer (E) formed by vacuum deposition or wet coating and the antireflection layer (E) on the hard coat layer (D) on the acrylic resin layer (B) side as the incident light side The impact-resistant resin laminate according to any one of claims 1 to 3, which is a layer having a rate of 2% or less.   A protective plate for a mobile device display device, which is transparent and has high hardness, comprising the impact-resistant resin laminate according to claim 1.