JP4401685B2 - Polymer substrate with cured resin layer having irregularities - Google Patents

Description

【図面の簡単な説明】
【図１】実施例１で形成した凹凸を有する硬化樹脂層付き高分子基板を、硬化樹脂で包埋後、ミクロトームで薄片試料とし、透過電子顕微鏡で撮影した断面写真である。
【図２】図１の超微粒子を含有した凹凸を有する硬化樹脂層をさらに拡大撮影した断面写真である。
【符号の説明】
１：包埋樹脂
２：超微粒子を含有した凹凸を有する硬化樹脂層
３：ＰＥＴフィルム
４：超微粒子を含有した凹凸を有する硬化樹脂層の拡大部分[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a polymer substrate with a cured resin layer having irregularities suitable for optical function applications. Such a polymer substrate is particularly suitable for an upper substrate and / or a lower substrate used for an antiglare layer and a resistive film type touch panel.
[0002]
[Prior art]
In recent years, the amount of use of optical use films such as display-related members has increased, but the film used for such uses may reflect outside light and affect the visibility of the display. As one method of avoiding this, a method of preventing reflection by roughening the surface of a film and scattering light is well known. As a roughening method, there are a method such as etching, sandblasting and embossing, and a method of applying and curing an ultraviolet curable resin in which fine particles are dispersed, and the latter method is generally adopted. For example, Patent Document 1 describes that antiglare property is exhibited by dispersing fine particles having an average primary particle diameter of 2 to 4 μm in a resin layer. However, in recent years, with the increase in the definition of displays, when the method of applying particles of several microns (including secondary agglomerated particles of fine particles) to the surface of the substrate as described above is used, the reflection of the appearance is reduced. On the other hand, the particles used and the resin around the particles exert a lens effect, thereby causing color separation (flickering) of pixels and a problem of remarkably degrading the visibility of the display.
[0003]
In order to solve such a problem, Patent Document 2 discloses that the average primary particle diameter is 1 to 5 μm, and the fine particles whose refractive index is controlled are dispersed in the resin layer, so that even if it is applied to a high-definition display, it is flickering. It is disclosed that an anti-glare layer that is less likely to cause erosion is formed. However, although the refractive index and the like are adjusted in the present invention, fine particles having an average primary particle diameter of several microns that are more commonly used than conventional ones are used. In contrast to such a system using substantially several micron fine particles, Patent Document 3 discloses that a compound or its oligomer that can be polymerized by irradiating activation energy rays, a thermoplastic resin, and an average primary It is described that an antiglare film-forming coating material comprising inorganic fine particles having a particle diameter of 0.001 μm or more and less than 1 μm is used. This is an example in which irregularities on the film surface are formed without using fine particles of several microns, including secondary particles, so that anti-glare properties can be exhibited by adopting such a configuration. However, it does not suppress the flicker of pixels when applied to a high-definition display.
[0004]
In recent years, a touch panel that realizes an interactive input method is often used as one of man-machine interfaces. Depending on the position detection method, the touch panel includes an optical method, an ultrasonic method, a capacitance method, a resistance film method, and the like. Among these, the resistive film method has been rapidly spread in recent years because of its simple structure and good price / performance ratio.
[0005]
A resistive film type touch panel is an electrical component configured by holding two films or sheets having a transparent conductive layer on opposite sides at a constant interval. Alternatively, the detection circuit detects the position by pressing one electrode with a finger, deflecting, contacting, and conducting, and a predetermined input is made. At this time, an interference color called a so-called Newton ring may appear in the vicinity of a pointing part such as a pen or a finger that is pressed, thereby reducing the visibility of the display.
[0006]
As a method for reducing Newton's ring in such a resistive film type touch panel, for example, Patent Document 4 discloses a coating layer containing a predetermined amount of filler having an average primary particle diameter of 1 to 4 μm and a transparent conductive layer on a plastic film. Is disclosed. Patent Document 5 discloses a method of forming a protrusion coating layer on a film having an average secondary particle diameter of silica of 1.0 to 3.0 μm.
[0007]
However, in recent years, with the higher definition of displays, the touch panel that uses the method of applying particles with an average primary or secondary particle size of several microns on the surface of the substrate as described above reduces Newton's ring while using it. The particles and the resin around the particles exert a lens effect, causing pixel color separation (flickering), and a problem that the visibility of the display is remarkably deteriorated.
[0008]
[Patent Document 1]
JP 2002-98813 A
[0009]
[Patent Document 2]
JP 2003-75611 A
[0010]
[Patent Document 3]
JP 2002-275391 A
[0011]
[Patent Document 4]
Japanese Patent Laid-Open No. 10-323931
[0012]
[Patent Document 5]
JP 2002-373056 A
[0013]
[Problems to be solved by the invention]
The present invention has been made in view of such a current situation, and provides a substrate suitable for a use that preferably provides a light scattering function (so-called anti-glare function) in which a screen hardly flickers even when applied to a high-definition display. And a rainbow pattern (so-called Newton ring) due to interference seen around the pen or finger when applied to an upper substrate and / or a lower substrate used for a display or an optical electronic component, particularly a resistive film type touch panel. It aims at providing the board | substrate with the cured resin layer which has the unevenness | corrugation which can be suppressed or prevented.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present inventors have intensively studied a surface roughening technique using ultrafine particles. As a result, conventional fine particles having an average particle diameter of several microns or fine particles having several microns have been conventionally used. Disperse substantially micron-sized particles, such as a system with nano-sized fine particles added, or a system using secondary-aggregate particles of several microns while using nano-sized ultra-fine particles. Unlike the state, the inventors succeeded in substantially uniformly dispersing fine particles composed of ultrafine particles having an average primary particle diameter of 100 nm or less. The present inventors have surprisingly found that the color separation (flickering) of pixels is hardly caused even when adapted to a high-definition display while reducing Newton's ring, and the present invention has been completed. The polymer substrate substrate with a cured resin layer having unevenness according to the present invention is suitable as an optical film having an antiglare function, and further using a combination of a transparent conductive layer and an optical interference layer as necessary, such as a touch panel. It is particularly suitable as an optical electronic component for such display applications.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following descriptions.
[0016]
Examples of the transparent polymer substrate used in the present invention include polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, polycarbonate polymers, cellulose polymers such as diacetyl cellulose and triacetyl cellulose, and acrylic polymers such as polymethyl methacrylate. Examples thereof include a substrate made of a transparent polymer. In addition, styrene polymers such as polystyrene, acrylonitrile / styrene copolymer, polyethylene, polypropylene, polyolefins having cyclic or norbornene structure, olefin polymers such as ethylene / propylene copolymer, vinyl chloride polymers, nylon and aromatic polyamides. A film made of a polymer having excellent transparency such as a typical amide-based polymer can be used. Furthermore, imide polymers, sulfone polymers, polyether sulfone polymers, polyether ether ketone polymers, polyphenylene sulfide polymers, vinyl alcohol polymers, vinylidene chloride polymers, vinyl butyral polymers, arylate polymers, polyoxymethylene polymers Examples of the film include a polymer and an epoxy polymer. Two or more kinds of the polymers may be blended and used. In the application in the present invention, among these transparent polymer substrates, those having low optical birefringence, those having a specific birefringence (for example, those controlled to λ / 4 or λ / 2), and further birefringence. What is not controlled at all can be appropriately selected according to the application.
[0017]
The case where it is appropriately selected according to the application mentioned here is, for example, a polarizing plate or a retardation film used in a liquid crystal display, and a function depending on polarization such as linearly polarized light, elliptically polarized light, circularly polarized light, etc. It refers to the case where it is used as a display member that develops.
[0018]
The film thickness of the transparent polymer substrate can be appropriately determined, but is generally about 10 to 500 μm from the viewpoint of workability such as strength and handleability. 20-300 micrometers is especially preferable, and 30-200 micrometers is more preferable.
[0019]
In the present invention, a cured resin layer is formed on one or both surfaces of the transparent polymer substrate. The surface of the cured resin layer has a fine uneven shape.
[0020]
As the resin for forming the cured resin layer having irregularities, the ultrafine particles having an average primary particle diameter of 100 nm or less can be basically uniformly dispersed in the formed cured resin layer. As long as it has a sufficient strength and is a transparent curable resin, it can be used without particular limitation. Examples of such curable resins include resins that are cured by a crosslinking reaction, such as thermosetting resins and active energy ray curable resins. Examples of the active energy rays include electron beams, ultraviolet rays, and radiation. Among these, ultraviolet curable resins that are cured by ultraviolet rays are preferable from the viewpoint of productivity and economy.
[0021]
Examples of the ultraviolet curable resin compound include monofunctional acrylates and polyfunctional acrylates. These acrylates can be further classified into polyesters, acrylics, urethanes, amides, silicones, epoxies, etc., and can also be classified into monomers, oligomers, polymers, etc. Alternatively, two or more kinds may be mixed and used. In addition, an ultraviolet polymerization initiator is usually added to the ultraviolet curable resin. Further, a third component such as a leveling agent or a photosensitizer may be added.
[0022]
The cured resin layer contains ultrafine particles having an average primary particle size of 100 nm or less. Such ultrafine particles can be used without any particular limitation. For example, Al ₂ O _Three , Bi ₂ O _Three , CeO ₂ , In ₂ O _Three , In ₂ O _Three ・ SnO ₂ , HfO ₂ , La ₂ O _Three , MgF ₂ , Sb ₂ O _Five , Sb ₂ O _Five ・ SnO ₂ , SiO ₂ , SnO ₂ TiO ₂ , Y ₂ O _Three , ZnO, ZrO ₂ And the like made of metal oxide or metal fluoride. Two or more of these may be used in combination. Further, the metal oxide and the metal fluoride can be used at the same time.
[0023]
The average primary particle size of the ultrafine particles is desirably smaller because the cured resin layer does not cause whitening due to internal haze, and needs to be 100 nm or less. The average primary particle diameter of such ultrafine particles is preferably 80 nm or less, more preferably 60 nm or less. The lower limit is not particularly limited but is 5 nm. The average primary particle diameter of the ultrafine particles can be measured using a laser diffraction / scattering particle size distribution analyzer. In order to easily measure the particle diameter, the actual size can be measured by using a transmission electron microscope or the like. Specifically, a cured resin layer containing ultrafine particles is embedded with an epoxy resin or the like, the epoxy resin layer is completely cured, and then sliced with a microtome to prepare a measurement sample. Furthermore, this measurement sample is observed with a transmission electron microscope, the size of the ultrafine particles is randomly measured at 10 or more points, and the average primary particle diameter can be obtained by averaging these measured values.
[0024]
In some cases, the polymer substrate with a cured resin layer having unevenness according to the present invention is generally desired to have low haze as an application, but ultrafine particles form aggregates (secondary particles) having optical wavelengths or more, In addition, when there is a difference in refractive index between the cured resin and the ultrafine particles, haze is likely to occur. For display applications or optical electronic component applications, it is desirable that the ultrafine particles do not form substantially distinct secondary particles. Furthermore, in order to make it difficult to generate haze, by using a combination in which the refractive index difference between the cured resin and the ultrafine particles becomes as small as possible, the reflective interface between the cured resin and the ultrafine particles can be eliminated and the internal haze can be reduced. it can.
[0025]
The content of the ultrafine particles dispersed in the cured resin layer is 5 to 200 parts by weight of ultrafine particles with respect to 100 parts by weight of the cured resin component (curable resin). The amount is preferably not less than 100 parts by weight and not more than 100 parts by weight. When the amount of the ultrafine particle component is less than 5 parts by weight, it is difficult to form a cured resin layer having fine irregularities on the surface suitable for display applications or optical electronic component applications. It is because it becomes difficult to have sufficient strength as a film after forming the cured resin layer because the ratio of the resin component is reduced.
[0026]
The thickness of the cured resin layer having irregularities on the surface is preferably 2 μm or more and 10 μm or less, and more preferably 2 μm or more and 7 μm or less. When the film thickness is less than 2 μm, the ultraviolet curable resin is not preferable because it is likely to be insufficiently cured due to the influence of oxygen. In general, when the film thickness exceeds 10 μm, the curing shrinkage of the ultraviolet curable resin deflects the polymer substrate and causes curling, which is not preferable. It is very important to control the film thickness of the uneven surface according to the present invention, because unevenness of a necessary shape is formed also by controlling the film thickness. Particularly in the case of the present invention, when only the film thickness is changed with a certain amount of the ultrafine particle component contained in the cured resin component, the surface tends to flatten as the film thickness decreases, and conversely the film thickness As the thickness increases, the surface tends to become rough.
[0027]
In the present invention, the term “ultrafine particles do not form substantially clear secondary particles in the cured resin layer” means that the ultrafine particles are basically uniformly dispersed in the cured resin layer, which is 1.0 μm or more. The secondary aggregate or secondary particle is not formed. Therefore, the present invention includes a case where ultrafine particles having an average primary particle diameter of 100 nm or less form secondary aggregates having a size of less than 1.0 μm.
[0028]
The surface of the cured resin layer preferably has a ten-point average roughness (Rz) defined by JIS B0601 of 100 nm or more and less than 500 nm, and more preferably 100 nm or more and less than 300 nm. When the ten-point average roughness is less than (Rz) 100 nm, Newton rings may occur when the glass or film substrate is brought into strong contact with the uneven surface of the present invention. On the other hand, when the 10-point average roughness is (Rz) 500 nm or more, the haze increases, and when applied to a high-definition liquid crystal display, pixel color separation occurs and flickering occurs. It is not preferable as a substrate for use.
[0029]
Further, the unevenness of the surface of the cured resin layer preferably has an average arithmetic roughness (Ra) defined by JIS B0601 of 10 nm or more and less than 80 nm, and more preferably 10 nm or more and less than 35 nm. When the average arithmetic roughness (Ra) is less than 10 nm, Newton's ring occurs when the glass or film substrate is brought into strong contact with the uneven surface of the present invention. In addition, if the average arithmetic roughness (Ra) exceeds 80 nm, the haze increases, and when applied to a high-definition liquid crystal display, the color separation of pixels occurs and causes flickering. It is not preferable.
[0030]
As a method for forming a cured resin layer having unevenness in the present invention, formation by a wet method is particularly suitable. In that case, for example, any known method such as a doctor knife, a bar coater, a gravure roll coater, a curtain coater, a knife coater, a spin coater, a spray method, a dipping method, or the like can be used.
[0031]
Specifically, for example, a predetermined amount of ultrafine particles dispersed in a dispersion is added to a curable resin, a reaction initiator is further added, and if necessary, a solvent is added for dilution or the like and mixed well. Next, this solution composition is applied to the surface of the transparent polymer substrate using the above method, and the cured resin layer is formed by reacting the resin by irradiation with heat or light.
[0032]
The cured resin layer having unevenness according to the present invention can freely control Rz, Ra, and further haze by changing parameters such as solvent, dispersant, amount of ultrafine particles added, and thickness of the cured resin layer. it can. In particular, the haze can be changed within a range of 1 to 20%. In particular, only an anti-glare function is necessary, and when the screen is not flickering and resolution is not deteriorated when applied to a high-definition display, the haze may be increased. For example, when used as an antiglare layer of a polarizing plate, the haze is preferably about 5 to 20%, and when used as an anti-Newton ring layer of a touch panel, about 2 to 5% is preferable.
[0033]
Moreover, the unevenness | corrugation of the surface of the cured resin layer in this invention is dependent also on the thixotropy of the ultrafine particle to be used. Therefore, when forming the cured resin layer for the purpose of expressing or controlling thixotropy, a solvent and a dispersant can be appropriately selected and used. As the solvent, for example, various alcohols, aromatics, ketones, lactates, cellosolves, glycols and the like can be used. Examples of the dispersant include various fatty acid amines, sulfonic acid amides, ε-caprolactone, hydrostearic acid, polycarboxylic acid, and polyesteramine. These solvents and dispersants can be used alone or in combination of two or more.
[0034]
Despite the fact that the cured resin layer in the present invention consists only of ultrafine particles containing a cured resin and a dispersant, it is substantially uniform without forming micron-sized clear secondary particles as in Patent Document 5. The reason for the dispersion and the formation of irregularities is not clear, but it is likely that the surface tension of the ultrafine particles is moving the surface of the cured resin layer. This phenomenon tends to be observed particularly when ultrafine particles have thixotropy, and a surface having completely different surface properties can be formed by appropriately selecting a solvent, a leveling agent, and a curable resin.
[0035]
The polymer substrate with a cured resin layer having irregularities on the surface includes a transparent conductive layer, an optical interference layer that controls reflectance by optical interference, and a hard coat layer, depending on the application, or a plurality of them. If necessary, they can be used in combination in an appropriate order. The order in which the transparent conductive layer, the optical interference layer, and the hard coat layer are laminated is not particularly limited as long as the function expected to be exhibited is achieved according to the application. When these stacking orders are used as, for example, a substrate for a touch panel, assuming that the transparent conductive layer is A, the optical interference layer is B, the cured resin layer having unevenness is C, the polymer substrate is D, and the hard coat is E, for example, A / B / C / D / E, A / B / C / D / C, A / B / B / C / D / E, A / B / B / C / D / C, A / C / D / E / B, A / C / D / C / B, A / C / D / E / B / B, A / C / D / C / B / B, and the like.
[0036]
Examples of the transparent conductive layer include an ITO film containing 2 to 20% by weight of tin oxide and a tin oxide film doped with antimony or fluorine. As a method for forming the transparent conductive layer, there are a PVD method such as a sputtering method, a vacuum deposition method, and an ion plating method, a coating method, a printing method, and a CVD method, and the PVD method or the CVD method is preferable.
[0037]
The optical interference layer described above refers to a layer that prevents or suppresses reflected light by appropriately combining a high refractive index layer and a low refractive index layer. The optical interference layer is composed of at least one high refractive index layer and at least one low refractive index layer. Two or more combination units of the high refractive index layer and the low refractive index layer may be used. When the optical interference layer is composed of one high refractive index layer and one low refractive index layer, the thickness of the optical interference layer is preferably 30 nm to 150 nm, and more preferably 50 nm to 150 nm. The optical interference layer can be formed by either a wet method or a dry method. For example, a wet method such as a doctor knife, bar coater, gravure roll coater, curtain coater, knife coater, spin coater, spray method, dipping method, etc. Printing method, CVD method, etc. can be applied.
[0038]
As the hard coat layer, a thermosetting resin, an active energy ray curable resin, or the like can be applied. Among these, an ultraviolet curable resin using ultraviolet rays for active energy rays is preferable because it is excellent in productivity and economy. Such ultraviolet curable resins include, for example, 1,6-hexanediol diacrylate, 1,4-butanediol diacrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, tetraethylene glycol diacrylate, tripropylene glycol diacrylate, neo Pentyl glycol diacrylate, 1,4-butanediol dimethacrylate, poly (butanediol) diacrylate, tetraethylene glycol dimethacrylate, 1,3-butylene glycol diacrylate, triethylene glycol diacrylate, triisopropylene glycol diacrylate, Diacrylates such as polyethylene glycol diacrylate and bisphenol A dimethacrylate; trimethylolpropane tria Triacrylates such as acrylate, trimethylolpropane trimethacrylate, pentaerythritol monohydroxytriacrylate and trimethylolpropane triethoxytriacrylate; tetraacrylates such as pentaerythritol tetraacrylate and di-trimethylolpropane tetraacrylate; and dipentaerythritol Mention may be made of pentaacrylates such as (monohydroxy) pentaacrylate. In addition, a polyfunctional acrylate having 5 or more functional groups can also be used. These polyfunctional acrylates may be used alone or in combination of two or more. Further, these acrylates are used by adding one or more of third components such as photoinitiators, photosensitizers, leveling agents, fine particles composed of metal oxides and acrylic components, and ultrafine particles. be able to.
[0039]
【The invention's effect】
According to the present invention, a surface that hardly causes color separation (flickering) of pixels even when applied to a high-definition display by a surface roughness control technology of a cured resin layer using ultrafine particles including a curable resin and a dispersant. It is possible to provide a substrate with a cured resin layer having irregularities, and a display and an optical electronic component using the substrate. As an optical electronic component, more specifically, Newton's ring is reduced, and it is possible to achieve a balance of optical characteristics that makes it difficult to cause pixel color separation (flickering) even when applied to high-definition displays. It can be applied as a completely new functional touch panel substrate having optical properties with excellent visibility that could not be achieved.
[0040]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to such examples. In the examples, parts and% are based on weight unless otherwise specified. Various measurements in the examples were performed as follows.
[0041]
Surface roughness: Measured using a stylus step meter DEKTAK3 manufactured by Sloan. The measurement conditions were a measurement length of 2000 μm and a high-pass filter of 20.00 μm, and the waviness component of the substrate was removed to calculate Ra and Rz.
[0042]
Haze: A haze value was measured using a Nippon Denshoku haze meter (MDH 2000).
[0043]
Evaluation of flickering property and Newton ring property: 1.1 mm thick glass is placed on a liquid crystal display of approximately 123 dpi (diagonal 10.4 inches, XGA (1024 × 768 dots)), and the unevenness of the present invention is provided on this glass. The polymer substrate with a cured resin layer was placed on the glass with the surface of the cured resin layer having irregularities in contact with the glass. At this time, flickering of pixels and the presence or absence of Newton rings were visually observed and evaluated.
[0044]
Confirmation of dispersion state of ultrafine particles: A polymer substrate with a cured resin layer having unevenness according to the present invention was embedded in an epoxy resin, and after the epoxy resin was completely cured, a thin piece sample was prepared with a microtome. This sample was observed with a transmission electron microscope, and it was confirmed that the dispersion of ultrafine particles was substantially uniformly dispersed (secondary aggregated particles of 1 μm or more were not formed) (FIGS. 1 and 2).
[0045]
[Example 1]
A polyester film (OFW-188, manufactured by Teijin DuPont Films, Ltd.) is used for the transparent polymer substrate. A coating solution R having the following composition is applied to one surface of the transparent polymer substrate with a wire bar, dried by heating at 80 ° C. for 1 minute, and then UV 120mW / cm with lamp ² 400 mJ / cm ² The cured resin layer having unevenness with a film thickness of about 5 μm was formed.
[0046]
Composition of coating liquid R
Acrylic ultraviolet curable resin: 100 parts by weight (Aronix M-215, manufactured by Toagosei Co., Ltd.)
Ultrafine particles: 15 parts by weight (in terms of solid content) (SiC Chemical Co., Ltd. SiO ₂ Ultrafine particles 10% by weight Isopropyl alcohol dispersion, average primary particle size of ultrafine particles is about 30 nm (determined by transmission electron microscope)
Photoinitiator: 5 parts by weight (Irgacure 184 manufactured by Ciba Specialty Chemicals Co., Ltd.)
Diluent: appropriate amount (isobutyl alcohol)
[0047]
The polymer substrate with a cured resin layer having irregularities thus obtained has the characteristics shown in Table 1. Ultrafine particles are uniformly dispersed in the cured resin layer as shown in FIG. 1 and FIG. It was a substrate that did not flicker when held over a (10.4 inch XGA) high-resolution liquid crystal display and did not cause Newton rings at the interface between glass and film.
[0048]
[Comparative Example 1]
The ultrafine particles of Example 1 were changed to silica-based particles having a primary average particle diameter of 3.0 μm, and the addition amount of silica-based particles was 0.5 parts by weight of the acrylic ultraviolet curable resin, and further formed irregularities. A polymer substrate with a cured resin layer having irregularities was obtained in the same manner as in Example 1 except that the thickness of the cured resin layer to be changed was changed to 2.3 μm.
[0049]
The polymer substrate having unevenness obtained as described above exhibits the characteristics shown in Table 1, and when placed on a high-resolution liquid crystal display of about 123 dpi (10.4 inches XGA), Newton rings do not occur, but the color of the pixels The substrate was separated and flickered.
[0050]
[Table 1]

[Brief description of the drawings]
1 is a cross-sectional photograph taken with a transmission electron microscope of a polymer substrate with a cured resin layer having unevenness formed in Example 1 after embedding with a cured resin, using a microtome as a thin piece sample.
2 is a cross-sectional photograph obtained by further enlarging an image of the cured resin layer having irregularities containing the ultrafine particles of FIG.
[Explanation of symbols]
1: Embedded resin
2: Cured resin layer having irregularities containing ultrafine particles
3: PET film
4: Enlarged portion of the cured resin layer having irregularities containing ultrafine particles

Claims (5)

-Out with at least one surface the cured resin layer of the transparent polymer substrate, a polymer substrate for a touch panel having a transparent conductive layer on the side of the cured resin layer of the transparent polymer substrate,
The cured resin layer consists only of cured resin and ultrafine particles,
The ultrafine particles are made of a metal oxide and / or metal fluoride having an average primary particle size of 100 nm or less,
The cured resin layer contains ultrafine particles (1) in a ratio of 5 parts by weight or more and 200 parts by weight or less with respect to 100 parts by weight of the cured resin component (2) without forming substantially clear secondary particles. , (3) thickness is at 2μm or more 10μm or less, and (4) are those having the uneven surface, the polymer substrate for data touch panel. Arithmetic mean roughness (Ra), motor touch panel for polymer substrate according to claim 1, wherein less than or more 10 nm 80 nm as defined by JIS B0601 of the cured resin layer having uneven. Haze, a is less than 1% to 20% according to claim 1 or 2 data touch panel for polymer substrate according as defined in JIS B7361. The ultrafine particles comprising the metal oxide and / or metal fluoride are Al ₂ O ₃ , Bi ₂ O ₃ , CeO ₂ , In ₂ O ₃ , In ₂ O ₃ .SnO ₂ , HfO ₂ , La ₂ O ₃ , MgF ₂ , Sb ₂ O ₅ , Sb ₂ O ₅ .SnO ₂ , SiO ₂ , SnO ₂ , TiO ₂ , Y ₂ O ₃ , ZnO and ZrO _2, at least one selected from the group consisting of data touch panel polymer substrate for crab described. The transparent conductive layer, the optical interference layer, and the hard coat layer are used alone or in combination with a polymer substrate for a touch panel with a cured resin layer having the unevenness in an appropriate order as necessary. data touch panel for the polymer substrate according to.

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