TW201620711A - Anti-newton ring laminate and capacitive touch panel using such anti-newton ring laminate - Google Patents

Abstract

The present invention relates to a laminate, which comprises a first layer having an unevenness shape of surface on at least one side, and a second layer having an unevenness shape of surface on at least one side, wherein the unevenness shape of surface of the first layer and the unevenness shape of surface of the second layer have a thickness of 1 to 6 [mu]m, and a surface roughness greater than 10 nm and less than 60 nm; and wherein the unevenness shape of surface of the first layer is opposite to the unevenness shape of surface of the second layer, and the laminate is laminated by contacting the unevenness shapes of surfaces to each other.

Description

Anti-Newtonian ring laminate and capacitive touch panel using the anti-Newton ring laminate

The present invention relates to an anti-Newtonian ring laminate and a capacitive touch panel using the anti-Newtonian laminate.

The touch panel is an electronic component that functions as a position input device, and is widely used in a mobile phone, a portable game machine, and the like in combination with a display device such as a liquid crystal display. The touch panel is an interface that allows an operator to perform an appropriate action desired by the operator by causing the device to sense the information of the specific position when the operator indicates the specific position of the touch panel with the hand or the stylus based on the screen display. As the touch panel, there are various methods depending on the operation principle of the position of the detection instruction, and there are a general-purpose resistive film type and a capacitive type. In particular, the capacitive type is rapidly expanding around mobile devices such as mobile phones. As a representative detection method of the capacitance type, there are two types of surface types of analog detection and a projection type using an integrated detection method using patterned electrodes.

As the capacitive touch panel, a glass plate having a conductive layer provided on one or both sides (hereinafter referred to as "sensor glass") may be used, usually on the front surface side of the sensor glass (touch) On the surface side, a glass plate is laminated via an adhesive layer (hereinafter referred to as "cover glass"). Further, in order to prevent breakage of the cover glass and scattering of the chips, a protective film sheet (resin film) is attached to the front side of the cover glass or the back side of the cover glass.

The touch panel is usually mounted on the front surface of the display device using an adhesive, especially in the case of a large display device, and only the outer edge portion of the touch panel is fixed by an adhesive in terms of cost.

As an example, FIG. 2 shows a configuration of a display device 300 with a capacitive touch panel in which only the outer edge portion of a conventional capacitive touch panel is fixed to the front surface of the display device by an adhesive. A schematic cross-sectional view. The display device 300 with a capacitive touch panel includes a liquid crystal display 311 in which a polarizing plate 312 is disposed on the front surface, and a capacitive touch panel 321 . The capacitive touch panel 321 includes a base material layer 303, an uneven layer 306 formed on the back surface side of the base material layer 303, a conductive layer 302y formed on the front surface side of the base material layer 303, and an adhesive layer provided on the front surface side of the conductive layer 302y. The layer 307, the conductive layer 302x disposed on the front surface side of the adhesive layer 307, the cover glass 301 disposed on the front surface side of the conductive layer 302x, and the printed layer 305. The conductive layer 302x is formed on the back side of the cover glass 301, and the conductive layer 302x is fixed to the conductive layer 302y by the adhesive layer 307. The capacitive touch panel 321 is disposed on the front surface of the liquid crystal display 311 with a gap between the liquid crystal display 321 and the liquid crystal display 311, and the outer edge portion is fixed to the liquid crystal display 311 by the adhesive layer 331. Thereby, a space is formed between the front surface of the liquid crystal display 311 and the back surface of the capacitive touch panel 321 .

In the field of optical films, there are cases where glare, Newton's rings, adhesions, and the like occur when a member such as a film comes into contact with other members such as a glass plate or other film. In order to prevent such problems, a fine uneven shape is provided on the surface of the film. Usually, the size of the irregularities to be formed is set according to the required properties (anti-glare, anti-Newton ring, anti-blocking), the largest in the case of anti-glare, and the smallest in the case of anti-adhesion. As a method of forming such an uneven shape, a method of causing a hard coat layer to contain particles and a method of separating a specific resin component by phase separation can be used. (for example, Patent Documents 1 to 8). In the capacitive touch panel 321 of FIG. 2, in order to impart anti-blocking performance, a film having a concavo-convex shape on one side is formed (the uneven layer 306 is formed on one surface of the base material layer 303).

In the optical film for suppressing the generation of Newton's rings in the liquid crystal display, an optical film having characteristics of 0.03 μm or more and 0.15 μm or less and a root mean square slope RΔq of 0.01 or more and 0.03 or less is disclosed. film. In the liquid crystal display, an embodiment in which the optical film is disposed on the back side of the front surface member for the purpose of designing the liquid crystal display, and the display surface side and the front side of the display portion are disclosed. The embodiment of the optical film is disposed on both of the back sides of the surface member (Fig. 9). However, the optical film cannot sufficiently reduce the haze, and particularly does not have sufficient optical properties for high-definition displays in recent years. Further, since the thickness of the optical layer is thick, if the substrate is thinned, curling occurs and the handleability is deteriorated.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2010-042671

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2010-060643

[Patent Document 3] Japanese Patent Laid-Open No. 2011-033948

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2012-206502

[Patent Document 5] Japanese Patent No. 5181793

[Patent Document 6] Japanese Patent Laid-Open Publication No. 2003-045234

[Patent Document 7] Japanese Patent No. 4,392,048

[Patent Document 8] Japanese Patent Laid-Open Publication No. 2007-182519

[Patent Document 9] Japanese Patent Laid-Open Publication No. 2010-066761

However, such a conventional film having irregularities further has a problem that when the stress is pressed against a smooth surface of glass or the like, the Newton's ring remains after the stress is released. This problem is caused by the touch panel mounted with the display device, which is generated when the touch panel is in contact with the display device when the user performs a touch operation. In the capacitive touch panel of FIG. 2, even if the uneven layer 306 is provided on the back surface of the base material layer 303, when the smoothness of the surface of the polarizing plate 312 is particularly high, the touch panel 321 is pressed against the stress. In this case, the Newton's ring may remain after the stress is removed. Further, the larger the display device is, the more significant the problem is. Moreover, such a problem is further remarkable when the glass substrate provided in the touch panel is one piece. The reason for this is that the touch panel having one glass substrate is likely to be deflected and strained, and is kept in contact with the polarizing plate on the front surface of the display device in the vicinity of the center, and is difficult to recover.

Further, since the conventional film having irregularities is premised on the smoothness of the surface of the display device in contact with the film, the technique of preventing the generation of Newton's rings by making the contact area between the display device and the film small is small. Under the ideology of the constructor, it is necessary to have a somewhat larger concave and convex shape. As a result, since the conventional film has large irregularities, the haze value is high. Therefore, in order to reduce the haze value and prevent the generation of Newton's rings, there is room for further improvement of the conventional film. As described above, it is desirable to have a high level of anti-Newtonian ring performance of the Newton's ring after the stress is removed, while reducing the haze value as much as possible.

The present invention has been made in view of the above problems, and an object thereof is to provide an optical performance excellent in brightness such as a touch surface, and also after stress relief The anti-Newtonian ring laminate of the Newton's ring does not remain and the capacitive touch panel using the anti-Newton ring laminate.

As a result of intensive studies, the inventors of the present invention have found that the above problems can be solved by using a laminate having at least a first layer having a surface shape having irregularities on one side, and at least a second layer having a surface shape having irregularities, and a surface shape of the unevenness of the first layer and a surface shape of the second layer are 1 to 6 μm, a surface roughness of more than 10 nm and less than 60 nm, and the surface The surface shape of the unevenness of the first layer is opposed to the surface shape of the unevenness of the second layer, and the surface shape of the unevenness is laminated to each other.

The present invention has the following aspects.

[1] A laminated body comprising: a first layer having a surface shape having irregularities on at least one surface; and a second layer having a surface shape having irregularities on at least one side, and a surface shape of the unevenness of the first layer and the above The surface shape of the unevenness of the second layer has a thickness of 1 to 6 μm, a surface roughness of more than 10 nm and less than 60 nm, and a surface shape of the unevenness of the first layer is opposite to a surface shape of the unevenness of the second layer, and the unevenness is The surface shapes are laminated in such a manner as to contact each other.

[2] The laminate according to [1], wherein the first layer and/or the second layer contains inorganic or organic fine particles having a particle diameter of 20 to 250 nm.

[3] The laminate according to [1] or [2], wherein the uneven surface of the first layer and/or the uneven surface of the second layer are separated by a resin composition containing at least two components to form irregularities .

[4] The laminated body according to any one of [1] to [3] wherein, in the uneven surface of the first layer and the uneven surface of the second layer, a concave-convex surface contains a particle diameter of 20 to 250 nm. The uneven resin layer of the machine or the organic fine particles, and the other uneven surface is an uneven resin layer formed by phase-separating the resin composition containing at least two components.

[5] The laminate according to any one of [1] to [4] wherein the first layer and the second layer have a haze of more than 0.6 and less than 7.0.

[6] A display device comprising the laminate of any one of [1] to [5].

[7] An optical film for incorporating a display device having a function of a touch panel, wherein the optical film has a surface shape having at least one surface and a surface having a surface shape of a concave and convex surface The thickness is more than 10 nm and less than 60 nm, and the optical film is used in at least two sheets in the same display device, and is disposed such that the surface shapes of the concavities and convexities are in contact with each other.

Here, in the specification and the patent application, the surface roughness is a value measured by the following measurement method.

(Method for measuring surface roughness)

The surface observation and image acquisition of each resin film were performed at a magnification of 200 times using a micro laser microscope (VK-X105 controller unit VK-X100 manufactured by KEYENCE Co., Ltd.). With respect to the obtained image, the measurement area was set to 100 μm×100 μm, and the arithmetic mean surface roughness Ra was calculated based on JIS B0601:2001 using the analysis software attached to the above micro laser microscope.

Alternatively, using a scanning probe microscope (Nanoscope IV and Nanoscope IIIa manufactured by Veeco Co., Ltd.), using a Si single crystal probe as a probe, the measurement mode is set to a Tapping mode, and the measurement area is set to 10 μm × 10 μm, image acquisition. For the obtained image, the attached analysis software is used as the addition processing for removing the ripple, and the flattening process (0 times) is performed once. After the plane adaptive (Planefit) process (XY) was performed once, the surface roughness was calculated.

Moreover, the transparency of the above laminated body was measured based on JIS K 7136, and the haze value was measured using NDH4000 by Nippon Denshoku Co., Ltd.

According to the present invention, it is possible to provide an anti-Newtonian ring-layered body having excellent optical properties such as good brightness of the touch surface, and which does not leave a Newton ring after the stress is removed, and a capacitive touch using the anti-Newton ring laminated body. panel.

1‧‧‧ glass substrate

2, 2x, 2y, 302x, 302y‧‧‧ conductive layer

3, 3a, 3b‧‧‧ substrate (transparent film)

4a, 4b‧‧‧ surface shape of the bump

5, 305‧‧‧Printing layer

7, 17, 31, 307, 331‧‧ ‧ adhesive layer

11, 311‧‧‧ liquid crystal display

12‧‧‧Substrate (polarizer)

21, 22, 321‧‧‧ capacitive touch panel

100‧‧‧Anti-Newtonian ring laminate

110‧‧‧1st floor

111, 121‧‧‧ substrate

112, 122‧‧‧ surface shape of the bump

120‧‧‧2nd floor

200, 201‧‧‧ Display device with capacitive touch panel using anti-Newton ring laminate of the present invention

300‧‧‧ Known display device with capacitive touch panel

301‧‧‧ Covering glass

303‧‧‧Substrate layer

306‧‧‧Concave layer

312‧‧‧Polar plate

Fig. 1 is a schematic cross-sectional view showing an example of an anti-Newtonian ring laminate of the present invention.

2 is a schematic cross-sectional view for explaining a configuration of a conventional display device with a capacitive touch panel.

Fig. 3 is a schematic cross-sectional view for explaining a configuration of a display device with a capacitive touch panel in which one aspect of the anti-Newtonian laminate of the present invention is used.

Fig. 4 is a schematic cross-sectional view for explaining a configuration of a display device with a capacitive touch panel using another aspect of the anti-Newtonian ring laminate of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a schematic cross-sectional view showing an anti-Newtonian ring laminate 100 of the present invention. The anti-Newton ring laminate 100 has a first layer 110 and a second layer 120. The first layer 110 has a base material 111 and a surface shape 112 of the unevenness. The base material 111 is not limited, and is, for example, a resin layer such as polyethylene terephthalate (PET) or a glass plate.

The surface shape 112 of the unevenness is a surface roughness of more than 10 nm and less than 60 nm. concave The convex surface shape 112 can be formed, for example, by applying a material such as a curable resin composition described below to the substrate 111 to form a coating film, and curing the coating film. The second layer 120 has a base material 121 and a surface shape 122 of the unevenness. The details of the surface shape 122 of the base material 121 and the unevenness are the same as those of the surface shape 112 of the base material 111 and the uneven surface.

The surface shape 112 of the unevenness and the surface shape 122 of the unevenness (the first layer 110 and the second layer 120) may be fixed to each other at the outer edge portion by an adhesive or an adhesive. Alternatively, the first layer 110 and the second layer 120 may be fixed to each other at the outer edge portion by a fixture (not shown).

The surface shape 112 of the unevenness is disposed opposite to the surface shape 122 of the unevenness, and is laminated in contact with each other. The surface shape 112 of the unevenness and the surface shape 122 of the uneven surface may not be in contact with all of the portions, and may be fixed in a non-contact state with respect to each other via an adhesive or an adhesive at the outer edge portion, and may be in contact with the central portion. The state of contact is laminated.

Examples of the film which can be used as the substrates 111 and 121 include a polyethylene terephthalate film, a polyethylene naphthalate film, a polytrimethylene terephthalate film, and a polyparaphenylene. Butylene formate film, polyethylene naphthalate film, polyethylene film, polypropylene film, celecoxib, diethyl phthalocyanine film, triethylene phthalate film, acetonitrile cellulose butyrate film, Polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, ethylene-vinyl acetate film, polystyrene film, polycarbonate film, polymethylpentene film, polyfluorene film, polyether ether A ketone film, a polyether ruthenium film, a polyether quinone film, a polyimide film, a fluororesin film, a polyamide film, an acrylic resin film, or the like.

The film is preferably a polyethylene terephthalate film from the viewpoints of weather resistance, solvent resistance, rigidity, cost, and the like.

The substrates 111, 121 are preferably transparent to the extent that they can be used for optical applications.

Various additives may be contained in the base materials 111 and 121. Examples of the additive include an antioxidant, a heat-resistant stabilizer, an ultraviolet absorber, organic particles, inorganic particles, a pigment, a dye, an antistatic agent, a nucleating agent, a coupling agent, and the like.

In order to improve the adhesion to the surface shapes 112 and 122 of the unevenness, the substrates 111 and 121 may be subjected to a surface treatment. Examples of the surface treatment include surface etching treatment such as embossing treatment such as blasting treatment or solvent treatment, corona discharge treatment, chromic acid treatment, flame treatment, hot air treatment, ozone ray irradiation treatment, and the like.

When the base materials 111 and 121 are films, the thickness of the base materials 111 and 121 is preferably from 10 to 300 μm, more preferably from 30 to 200 μm, and particularly preferably from 35 to 130 μm from the viewpoint of ensuring strength and preventing curling. . When the base materials 111 and 121 are glass, the thickness of the base materials 111 and 121 is preferably 0.1 mm or more, and more preferably 0.2 mm or more.

The base materials 111 and 121 may be made of a glass polarizing plate or a resin polarizing plate. For example, in the capacitive touch panel 200 of FIG. 3 described below, the polarizing plate 12 constituting the frontmost surface of the liquid crystal display 11 can function as one of the substrate 111 or the substrate 121, and the substrate 3 can serve as a substrate. 111 or the other of the substrates 121 functions. Similarly, in the capacitive touch panel 201 of FIG. 4, the polarizing plate 12 constituting the frontmost surface of the liquid crystal display 11 can function as one of the substrate 111 or the substrate 121, and the substrate 3b can serve as the substrate 111 or The other of the substrates 121 functions.

The surface shapes 112 and 122 of the unevenness are provided to impart anti-Newton ring performance and the like. In the capacitive touch panel 200 of FIG. 3, the surface shape 4a of the unevenness corresponds to the surface shape 112 of the unevenness, and the surface shape 4b of the unevenness corresponds to the surface shape 122 of the unevenness. Moreover, in the capacitive touch panel 201 of FIG. 4, the surface shape 4a of the unevenness corresponds to the surface shape 112 of the unevenness, and the surface shape 4b of the unevenness is concave. The convex surface shape 122 corresponds.

The surface shapes 112 and 122 of the unevenness can be formed by applying a coating liquid for forming a hard coat layer containing a thermosetting or active energy ray-curable resin component to a substrate (substrate 111 or substrate 121). The coating film is formed to cure the coating film. Specific examples of the method of forming the unevenness include a method of blending particles in a material for forming a resin layer, and a material for forming a resin layer containing two kinds of resin components having different solubility parameter (SP) values, and coating Then, a method in which a resin component is precipitated by phase separation or the like is used.

In the case where the resin layer forming material is substantially not phase-separated, the resin layer forming material preferably contains inorganic or organic fine particles having a particle diameter of less than 250 nm. Further, when the resin layer forming material contains a substantially phase-separated resin component, the resin layer forming material preferably does not substantially contain inorganic or organic fine particles having a particle diameter of less than 250 nm. By using any of these resin layer forming materials, the anti-Newtonian ring-layered body of the present invention is excellent in both optical properties and anti-Newton ring properties.

Further, substantially no phase separation means that the resin component forming material (composition) does not substantially contain the phase-separated resin component. For example, when the resin layer forming material contains two kinds of resin components having different solubility parameter (SP) values, the difference between the SP values of the two resin components is 1.0 or more, and the total mass of the resin layer forming material is set to When the amount is 100% by mass, the content of the resin component having a small amount is preferably 3% by mass or less. It is more preferably 2% by mass or less, further preferably 1% by mass or less, and most preferably 0.1% by mass or less.

In the case where the resin layer forming material (composition) is a phase separator, when the total mass of the resin layer forming material is 100% by mass, the content of inorganic or organic fine particles having a particle diameter of less than 250 nm is higher. Good is 3 mass% or less. More preferably 2% by mass Hereinafter, it is more preferably 1% by mass or less, and most preferably 0.1% by mass or less.

Examples of the thermosetting resin component include a phenol resin, a urea resin, a diallyl phthalate resin, a melamine resin, an unsaturated polyester resin, a polyurethane resin, and an epoxy resin. , an amino alkyd resin, an anthracene resin, a polyoxyalkylene resin, and the like.

The resin component which is an active energy ray-curable resin includes a polymerizable unsaturated group which can be polymerized by irradiation with an active energy ray (for example, a group containing a polymerizable unsaturated bond such as an ethylenic double bond). . In the active energy ray-curable resin component, a photopolymerization initiator or the like is optionally disposed.

The surface layer 112 and 122 of the unevenness are preferably a composition for forming a resin layer containing a polyfunctional (meth)acrylic monomer and particles by an active energy ray (hereinafter referred to as "the composition for forming a resin layer (X)"). Hardened hardened material. In the cured product, the base material (parts other than the particles) contains a hard acrylic polymer having a crosslinked structure, and thus is excellent in surface hardness, transparency, scratch resistance, and the like. In addition, the anti-Newton ring laminate 100 contains particles by the surface shape 112 of the unevenness and the surface shape 122 of the unevenness, thereby suppressing shrinkage of the laminate when the resin layer forming composition (X) is cured.

"Polyfunctional" means a compound having two or more polymerizable unsaturated groups, and the "(meth)acrylic monomer" is a compound having at least a (meth)acryl fluorenyl group as a polymerizable unsaturated group. The "(meth)acryloyl group" means an acryloyl group or a methacryloyl group.

Examples of the polyfunctional (meth)acrylic monomer include dipropylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, and 1,4-butanediol di(meth)acrylate. 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, propylene oxide modified neopentyl glycol di(meth)acrylate, neopentyl glycol Diacid di(meth)acrylate, hydroxytrimethylacetic acid neopentyl glycol di(meth)acrylate, dicyclopentyl Di(meth)acrylate, caprolactone modified dicyclopentenyl di(meth)acrylate, polyethylene glycol (preferably mass average molecular weight 400-600) di(meth)acrylate, modified Bisphenol A di(meth)acrylate, tricyclodecane dimethanol di(meth)acrylate, ethylene oxide modified di(meth)acrylate, allylcyclohexyldi(methyl) a bifunctional (meth) acrylate such as acrylate or isocyanurate di(meth)acrylate; pentaerythritol tri(meth)acrylate, dipentaerythritol tri(meth)acrylate Propionic acid modified dipentaerythritol tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, trimethylolpropane ethoxy tri(meth)acrylate, epoxy B Alkyl modified trimethylolpropane tri(meth)acrylate, propylene oxide modified trimethylolpropane tri(meth)acrylate, polyether tri(meth)acrylate, glycerol propoxy three ( Trifunctional (meth) acrylate such as methyl acrylate or propylene (propylene oxyethyl) isocyanurate; neopentyl alcohol tetra (meth) acrylate, neopentyl alcohol ethoxy 4 (meth) acrylate, two - Tetrafunctional (meth) acrylate such as hydroxymethylpropane tetra(meth) acrylate; dipentaerythritol penta (meth) acrylate, propionic acid modified dine pentaerythritol penta (meth) acrylate 5 or more functionalities such as dipentaerythritol monohydroxypenta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, caprolactone-modified dipentaerythritol hexa(meth)acrylate (meth) acrylate and the like.

These polyfunctional (meth)acrylic monomers may be used alone or in combination of two or more.

The polyfunctional (meth)acrylic monomer is preferably a (meth)acrylic monomer containing 4 functional or more (preferably 5 functional or more, more preferably 6 functional). A tetrafunctional or higher (meth)acrylic monomer contributes to an increase in hardness.

In all of the polyfunctional (meth)acrylic monomers, the ratio of the tetrafunctional or higher (meth)acrylic monomer is preferably 50% by mass or more, more preferably 60% by mass or more, and still more preferably 70% by mass or more. The optimum is 80% by mass or more.

The particles contained in the resin layer-forming composition (X) may be inorganic particles or organic particles. As the inorganic particles, those having a higher hardness are preferably used, and for example, inorganic oxide particles such as cerium oxide particles, titanium oxide particles, zirconia particles, alumina particles, tin oxide particles, cerium pentoxide particles, and antimony trioxide particles can be used. .

The inorganic particles may be reactive inorganic oxide particles obtained by treating the inorganic oxide particles with a coupling agent. The bonding force with the acrylic polymer can be improved by treatment with a coupling agent. As a result, the surface hardness and the scratch resistance can be improved, and the dispersibility of the inorganic oxide particles can be improved.

Examples of the coupling agent include γ-aminopropyltriethoxydecane, γ-aminopropyltrimethoxydecane, γ-glycidoxypropyltriethoxydecane, and γ-glycidol. Oxypropyltrimethoxydecane, γ-mercaptopropyltrimethoxydecane, γ-aminopropyltriethoxydecane, γ-aminopropyltriethoxyaluminum, and the like. These may be used alone or in combination of two or more.

The amount of the coupling agent to be treated is preferably 0.1 to 20 parts by mass, more preferably 1 to 10 parts by mass, per 100 parts by mass of the inorganic oxide particles.

As the organic particles, for example, resin particles such as an acrylic resin, polystyrene, polyoxyalkylene, melamine resin, benzoguanamine resin, polytetrafluoroethylene, cellulose acetate, polycarbonate, or polyamide can be used.

The organic particles may be reactive resin particles obtained by treating the resin particles with a coupling agent. The bonding force with the acrylic polymer can be improved by treatment with a coupling agent. As a result, the surface hardness and the scratch resistance can be improved, and the dispersibility of the resin particles can be improved.

The coupling agent and its treatment amount are the same as those of the above-mentioned reactive inorganic oxide particles and their treatment amounts.

In order to have sufficient anti-Newtonian properties and excellent optical properties, the particle size of the particles is less than 250 nm. The particle diameter of the particles is preferably from 10 nm to 200 nm, more preferably from 20 nm to 150 nm, still more preferably from 30 nm to 100 nm.

In the solid content of the resin layer-forming composition (X), the amount of the particles is preferably from 1 to 20% by mass, more preferably from 3 to 15% by mass, even more preferably from 5 to 10% by mass. If the blending amount of the particles is within such a preferred range, the anti-Newtonian ring performance is further improved. In addition, when it is 1% by mass or more, the anti-Newton ring performance is improved, and when it is 20% by mass or less, a sufficient amount of the polyfunctional (meth)acrylic monomer can be blended, so that the hard coat performance is improved.

In addition, when the solid content does not contain a solvent, the total of all the components constituting the resin layer-forming composition (X) is shown, and when the solvent is contained, the total of all components except the solvent is shown.

In order to promote the hardening, the resin layer-forming composition (X) preferably contains the above-mentioned polyfunctional (meth)acrylic monomer and particles and contains a photopolymerization initiator.

As the photopolymerization initiator, a known one can be used, and examples thereof include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, and dimethylamino group. Acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-benzene Propane-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-[4(methylthio)phenyl]-2- Orolinyl-propan-1-one, 4-(2-hydroxyethoxy)phenyl-2(hydroxy-2-propyl)one, benzophenone, p-phenylbenzophenone, 4,4' -diethylaminobenzophenone, propiophenone, dichlorobenzophenone, 2-methyloxime, 2-ethylhydrazine, 2-tert-butylhydrazine, 2-aminopurine, 2-methyl 9-oxosulfur 2-ethyl 9-oxosulfur 2-chloro 9-oxosulfur 2,4-dimethyl 9-oxosulfur 2,4-diethyl 9-oxosulfur , benzyl dimethyl ketal, acetophenone dimethyl ketal, p-dimethylamine benzoate and the like. These photopolymerization initiators may be used alone or in combination of two or more.

In the solid content of the resin layer-forming composition (X), the amount of the photopolymerization initiator is preferably from 0.5 to 10% by mass, more preferably from 2 to 8% by mass. When it is 0.5% by mass or more, it is difficult to cause hardening failure. Even if the blending amount exceeds 10% by mass, the hardening promoting effect corresponding to the blending amount cannot be obtained, and the cost is also increased. Further, there is a cause of yellowing, bleeding, and the like remaining in the cured product.

In addition to the photopolymerization initiator, it may further contain a photosensitizer. Examples of the photosensitizer include n-butylamine, triethylamine, and tri-n-butylphosphine.

The resin layer-forming composition (X) may contain other components than the above, as long as it does not impair the effects of the present invention. For example, a known additive for imparting other functions (water repellency, oil repellency, antifouling property, coating suitability, antistatic property, ultraviolet shielding property, etc.) other than scratch resistance to the uneven resin layer may be contained. Examples of such an additive include a fluorine-based compound, a polyoxyalkylene-based compound, metal oxide fine particles, an antistatic resin, a conductive polymer, and an ultraviolet absorber. By adding a fluorine-based compound, it is possible to impart an antifouling effect of water repellency, oil repellency, and stains which are difficult to adhere to stains and which are easy to wipe. Moreover, by adding a polyoxyalkylene-based compound, it is possible to enhance the water-repellent property, the adhesion of the stain, and the adhesion of the adhered stain to the antifouling effect and the coating suitability. Further, by adding metal oxide fine particles, an antistatic resin, or a conductive polymer, antistatic properties can be imparted. Further, by adding metal oxide fine particles or an ultraviolet absorber, ultraviolet shielding properties can be imparted.

The resin layer-forming composition (X) may contain a solvent.

As the solvent, for example, methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, Toluene, n-hexane, n-butanol, methyl isobutyl ketone, methyl butyl ketone, ethyl butyl ketone, cyclohexanone, ethyl acetate, butyl acetate, propylene glycol monomethyl ether acetate, ethylene Alcohol monoethyl ether, propylene glycol monomethyl ether, N-methyl-2-pyrrolidone and the like. These may be used alone or in combination of two or more.

In order to reduce the possibility of coating, it is also possible to use two or more solvents having different evaporation rates. For example, at least two selected from the group consisting of methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, butyl acetate, and propylene glycol monomethyl ether can be used in combination.

The surface shapes 112 and 122 of the unevenness are formed by applying a material for forming a resin layer such as the resin layer forming composition (X) onto the surfaces of the substrates 111 and 121 to form a coating film, and curing the coating film.

Examples of the coating method of the material for forming a resin layer include a knife coater, an air knife coater, a roll coater, a bar coater, a gravure coater, and a micro gravure coater. A method of a bar blade coater, a lip coater, a die coater, a curtain coater, a printer, and the like.

The coating amount of the resin layer forming material is set according to the thickness of the surface shapes 112 and 122 of the unevenness.

The thickness of the surface shapes 112 and 122 of the unevenness is preferably 1 to 6 μm, more preferably 2 to 5 μm. If the thickness is 1 μm or more, sufficient hard coat performance can be obtained. When it is 6 μm or less, transparency, substrate adhesion, and curl resistance are excellent.

Further, the thickness of the thinnest portion of the surface shapes 112 and 122 of the unevenness (the distance from the bottom of the concave portion of the surface shapes 112 and 122 existing on the uneven surface to the surface on the side of the substrate 111 and 121) is defined as the surface shape of the uneven surface. The thickness of 112, 122.

It is preferable that the surface shapes 112 and 122 of the unevenness are heated and dried before the coating film is formed and before the coating film is cured. The condition for heating and drying is, for example, preferably 60 ° C~ 100 ° C, 30 seconds ~ 90 seconds. More preferably 70 ° C ~ 90 ° C, 45 seconds ~ 75 seconds. The laminate of the present invention has both excellent optical properties and sufficient anti-Newtonian ring properties by heat drying under the above-mentioned preferred range.

When the resin layer-forming material is active energy ray-curable as in the case of the resin layer-forming composition (X), the coating film can be cured by irradiation with an active energy ray. When the material for forming the resin layer is thermosetting, the coating film can be cured by heating using a heating furnace or an infrared lamp.

Examples of the active energy ray include free radiation such as ultraviolet rays, electron beams, visible rays, and gamma rays. Among them, ultraviolet rays are preferred from the viewpoint of versatility. As the light source of the ultraviolet light, for example, a high pressure mercury lamp, a low pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a carbon arc, a xenon arc, an electrodeless ultraviolet lamp, or the like can be used.

As the electron beam, for example, various electron beam accelerators such as a Kirklev-Walton type, a Van de Graaff type, a resonance transformer type, an insulated core transformer type, a linear type, a high frequency high voltage type, and a high frequency type can be used. The emitted electron beam.

The hardening by irradiation with an active energy ray is preferably carried out in the presence of an inert gas such as nitrogen.

The hardening can be carried out in one stage, and can also be carried out in two stages of a preliminary hardening step and a main hardening step.

The anti-Newtonian ring layer body 100 of the present invention preferably has a total light transmittance of 90% or more. Further, the laminate has a haze of 1.5% or less, preferably 1.3% or less, more preferably 1.2% or less, still more preferably 1.1% or less, still more preferably 1.0% or less, and most preferably 0.9% or less. If these conditions are satisfied, it is useful as an optical member for a touch panel and a display device.

Full light transmittance and haze can be obtained by JIS K7361-1 and JIS, respectively. Determined by the method of K7136.

3 is a schematic cross-sectional view for explaining a configuration of a display device 200 with a capacitive touch panel in which one aspect of the anti-Newton ring laminate 100 of the present invention is used.

A display device 200 with a capacitive touch panel includes a liquid crystal display 11 having a polarizing plate 12 on which a layer 4b having a surface shape of irregularities is formed on a front surface, and a capacitive touch panel 25. The touch panel 25 is disposed on the front surface of the liquid crystal display 11 with a gap between the touch panel 25 and the liquid crystal display 11, and the outer edge portion is fixed to the liquid crystal display 11 by the adhesive layer 31. Thereby, a space is formed between the front surface of the liquid crystal display 11 and the back surface of the touch panel 25.

The touch panel 25 includes a glass substrate 1 , a conductive layer 2 x formed on the back surface of the glass substrate, an adhesive layer 7 , a printed layer 5 , a substrate 3 , a conductive layer 2 y formed on the front surface of the substrate 3 , and a substrate 3 formed on the substrate 3 . The surface shape 4a of the unevenness on the back side. The glass substrate 1 and the conductive layer 2x are in close contact with the front surface of the conductive layer 2y by the adhesive layer 7. A printed layer 5 is formed on the outer edge portion of the front surface of the conductive layer 2y.

The conductive layer 2x is a conductive layer for detecting the position in the horizontal axis direction, and the conductive layer 2y is a conductive layer for detecting the position in the vertical axis direction.

The surface shape 4a of the unevenness faces the liquid crystal display device 11.

In addition, in the scope of the present specification and the patent application, "front surface" means the side of the side that is visually recognized and operated by the user when using a capacitive touch panel or a display device mounted thereon, and "back" means and uses The side that is visually recognized and operated is the opposite side. There is a case where the front surface of the touch panel is referred to as a touch surface.

[Liquid Crystal Display 11]

The liquid crystal display 11 is not particularly limited, and a known liquid crystal display can be used in addition to the polarizing plate 12 which can be used for the layer 4b having a surface shape in which irregularities are formed on the surface.

[Touch Panel 25] (glass substrate 1)

As the glass substrate 1, a known glass plate used for a touch panel or the like can be used.

The thickness of the glass substrate 1 is preferably 0.1 mm or more, and more preferably 0.2 mm or more. If it is 0.1 mm or more, the strength of the touch panel 11 becomes sufficient. The upper limit is not particularly limited. However, if it exceeds 3 mm, the deflection and strain are less likely to occur, and the Newton's ring is less likely to occur. Therefore, from the viewpoint of the usefulness of the present invention and excellent transparency, it is preferably 3 mm. Hereinafter, it is more preferably 2 mm or less.

(conductive layer 2x, 2y)

The conductive layers 2x and 2y are transparent conductive films.

The conductive layers 2x and 2y are used for a surface type capacitive touch panel or the like, and may be a uniform layer formed with a substantially uniform thickness, or may be used for a projection type capacitive touch panel or the like for a sense of position. A conductive layer having a regular pattern formed as measured. Further, in the case of a uniform layer, one of the conductive layers 2x and 2y may be patterned in order to form an extraction electrode or the like according to the configuration of the touch panel or the like.

Examples of the material of the conductive layers 2x and 2y include metals such as gold, silver, platinum, palladium, copper, aluminum, nickel, chromium, titanium, iron, cobalt, tin, and the like; and indium-tin oxidation. Oxidation of metals such as Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), Zinc Oxide (ZnO), and Zinc Tin Oxide (ZTO) Other metal compound containing copper iodide or the like; Conductive resin such as PEDOT/PSS. Further, the above PEDOT/PSS is a polymerized composite in which PEDOT (polymer of 3,4-ethylenedioxythiophene) and PSS (polymer of styrenesulfonic acid) are present.

The thickness of the conductive layers 2x and 2y is set in consideration of conductivity, transparency, and the like. In order to provide the electrode plate for a touch panel, the conductivity of the conductive layers 2x and 2y is preferably 10 ⁵ Ω/sq or less, more preferably 10 ³ Ω/sq or less, in terms of surface resistance. Generally, when the surface resistance is in the case of a metal system, it can be achieved by a thickness of 30 to 600 Å, and in the case of a metal oxide system, it can be achieved by a thickness of 80 to 5,000 Å.

The conductive layers 2x and 2y can be formed by a known method.

For example, when the conductive layer 2 is a uniform layer, a vacuum deposition method, a sputtering method, an ion plating method, a spray pyrolysis method, a chemical plating method, a plating method, a coating method, or the like may be mentioned. Film formation method such as combination method. From the viewpoints of the formation speed of the film, the formation of a large-area film, productivity, and the like, a vacuum deposition method or a sputtering method is preferred.

The regular pattern can be formed by a method in which the conductive layers 2x and 2y are partially disposed in advance on the surfaces of the glass substrate 1 and the substrate 3 by various printing methods, or by forming a uniform layer as described above, by etching, or the like. A part of it is removed to form.

In order to improve the adhesion between the conductive layers 2x and 2y and the glass substrate 1 and the substrate 3, the surfaces of the glass substrate 1 and the substrate 3 may be subjected to corona discharge treatment, ultraviolet irradiation treatment, plasma treatment, sputtering etching treatment, or the like. The primer coating treatment or the like is appropriately treated beforehand.

(adhesive layer 7)

As the adhesive constituting the adhesive layer 7, a known adhesive for optical use such as a touch panel can be used. Examples of the adhesive include a natural rubber-based adhesive, a synthetic rubber-based adhesive, an acrylic adhesive, and an urethane-based adhesive. Polyoxygenated adhesives, etc. The adhesive may be any of a solvent system, a solventless system, an emulsion system, and a water system. Among them, from the viewpoints of transparency, weather resistance, durability, cost, and the like, an acrylic adhesive is preferable, and a solvent is preferable.

In the adhesive, other additives may also be added as needed. Examples of the other auxiliary agent include an antioxidant, an adhesion-imparting agent, a decane coupling agent, a UV absorber, a light stabilizer such as a hindered amine compound, a tackifier, a pH adjuster, a binder, a crosslinking agent, and adhesion. Particles, antifoaming agents, antiseptic and antifungal agents, pigments, inorganic fillers, stabilizers, wetting agents, wetting agents, and the like.

The thickness of the adhesive layer 7 is preferably 10 to 100 μm, more preferably 20 to 80 μm. If it is 10 μm or more, sufficient adhesion is obtained. When the thickness of the adhesive layer 7 exceeds 100 μm, it is disadvantageous in terms of thickness reduction and cost.

On the back surface of the substrate 3, a surface shape 4a having irregularities is formed. On the front surface of the polarizing plate 12, a surface shape 4b having irregularities is formed.

When the surface roughness of the surface of the unevenness is greater than 10 nm and less than 60 nm, when the glass sheet 1 is deflected in the direction of the liquid crystal display device 11, even if the surface shape 4a of the uneven surface contacts the surface shape 4b of the uneven surface, it is difficult. A Newtonian ring is produced and the Newton's ring is difficult to remain.

Since the surface roughness is more than 10 nm, the contact area between the first layer and the second layer is smaller than that of the case where no unevenness is present on both sides or on one side, and the separation is easy, so that an excellent anti-Newton ring effect can be exhibited. The surface roughness is preferably 13 nm or more, more preferably 15 nm or more.

Since the surface roughness is less than 60 nm, the haze of the laminated body is small, and the transparency of the laminated body becomes high, and it is difficult to impair the brightness of the touch surface. The surface roughness is preferably less than 50 nm, more preferably less than 40 nm, and even more preferably less than 30 nm.

The surface shape of the unevenness satisfying the above surface roughness can be obtained in accordance with the materials and conditions of the examples and comparative examples of the present specification.

Fig. 4 is a schematic cross-sectional view for explaining a configuration of a display device 201 with a capacitive touch panel in another aspect of the anti-Newtonian laminate according to the present invention.

The display device 201 with a capacitive touch panel shown in FIG. 4 includes a liquid crystal display 11 and a touch panel 21. The touch panel 21 includes a glass substrate 1, an adhesive layer 7, a conductive layer 2x, a first base material 3a, an adhesive layer 17, a conductive layer 2y, a second base material 3b, and a concave-convex formed on the back surface of the second base material 3b. The surface shape 4a.

The back surface of the glass substrate 1 and the surface before the conductive layer 2x are in close contact via the adhesive layer 7. The back surface of the first base material 3a and the surface before the conductive layer 2y are in close contact with each other via the adhesive layer 17. A printed layer 5 is formed on the outer edge portion of the surface before the conductive layer 2x.

The conductive layer 2x is a conductive layer for detecting the position in the horizontal axis direction, and the conductive layer 2y is a conductive layer for detecting the position in the vertical axis direction. Further, the conductive layer 2x may be a conductive layer for detecting a position in the longitudinal direction, and the conductive layer 2y may be a conductive layer for detecting a position in the horizontal axis direction. The adhesive layer 17 is an insulating adhesive layer.

The surface shape 4a of the unevenness faces the surface shape 4b of the unevenness. The surface roughness of the uneven surface shapes 4a, 4b is greater than 10 nm and less than 60 nm. The preferred range of surface roughness is the same as the surface roughness of the display device 200 with the capacitive touch panel.

Although the conductive film sheet of the present invention and the touch panel using the same have been described above, the present invention is not limited to these.

For example, in the above description, an example in which a liquid crystal display is used as a display device has been described, but the present invention is not limited thereto. For example, various display devices such as a cathode ray tube (CRT) display, a plasma display, and an electroluminescence (EL) display can be used.

[Examples]

Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to the examples.

(Production of Resin Film A1)

As a polyfunctional (meth) acrylate, 100 parts by mass of tannic acid having a particle diameter of 50 nm, which is mixed with dipentaerythritol hexaacrylate (6-functional acrylate, trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) 20 parts by mass of a gel dispersion (organic bismuth sol type L, solid content concentration: 30%, manufactured by Nissan Chemical Industries Co., Ltd.), and a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Co., Ltd.) of 4 parts by mass. The resin layer-forming composition A was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition A for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition A applied to the substrate was cured to have a resin layer having a thickness of 5 μm. Thus, the resin film A1 was obtained.

(Production of Resin Film A2)

As a polyfunctional (meth) acrylate, 100 parts by mass of a neodymidine tetraol hexaacrylate (trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) and a tannin having a particle diameter of 50 nm are mixed. Glue dispersion (organic bismuth sol type L, solid part) 20 parts by mass of a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Co., Ltd.), 20 parts by mass, at a concentration of 30%, manufactured by Nissan Chemical Industry Co., Ltd. The resin layer-forming composition A was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition A for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition A applied to the substrate was cured to have a resin layer having a thickness of 2 μm. Thus, the resin film A2 was obtained.

(Production of Resin Film A3)

As a polyfunctional (meth) acrylate, 100 parts by mass of a neodymidine tetraol hexaacrylate (trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) and a tannin having a particle diameter of 50 nm are mixed. 20 parts by mass of a gel dispersion (organic bismuth sol type L, solid content concentration: 30%, manufactured by Nissan Chemical Industries Co., Ltd.), and a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Co., Ltd.) of 4 parts by mass. The resin layer-forming composition A was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition A for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Thereafter, a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) was used for the substrate at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, and 2 passes. Irradiation of ultraviolet light in a nitrogen atmosphere. Thereby, the composition A applied to the substrate was cured to have a resin layer having a thickness of 7 μm. Thus, the resin film A3 was obtained.

(Production of Resin Film A4)

As a polyfunctional (meth) acrylate, 100 parts by mass of a neodymidine tetraol hexaacrylate (trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) and a tannin having a particle diameter of 50 nm are mixed. 20 parts by mass of a gel dispersion (organic bismuth sol type L, solid content concentration: 30%, manufactured by Nissan Chemical Industries Co., Ltd.), and a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Co., Ltd.) of 4 parts by mass. The resin layer-forming composition A was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition A for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition A applied to the substrate is cured to have a resin layer having a thickness of 0.5 μm. Thus, the resin film A4 was obtained.

(Production of Resin Film B1)

As a polyfunctional (meth) acrylate, 100 parts by weight of a neopentyl alcohol hexaacrylate (6-functional acrylate, trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) and a particle size of 100 nm gutar gum are mixed. 20 parts by mass of a dispersion (organic oxime sol type Z, solid content concentration: 30%, manufactured by Nissan Chemical Industry Co., Ltd.), and a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Co., Ltd.) of 4 parts by mass. borrow The mixture was diluted with methyl ethyl ketone so that the solid content concentration became 50%, and the resin layer-forming composition B was prepared.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition B for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition B applied to the substrate is cured to have a resin layer having a thickness of 5 μm. Thus, the resin film B1 was obtained.

(Production of Resin Film C1)

The resin layer-forming composition C (trade name: Lucifral NAB-007 solid content concentration: 40% manufactured by Nippon Paint Co., Ltd.) which is formed by surface separation by phase separation is bar-coated on a substrate (PET having a thickness of 100 μm) The surface of the film, trade name A4300, manufactured by Toyobo Co., Ltd.). Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition C applied to the substrate is cured to form a resin layer having a thickness of 5 μm. Thus, the resin film C1 was obtained.

(Production of Resin Film D1)

As a polyfunctional (meth) acrylate, dipentaerythritol hexaacrylate (6-functional acrylate, trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) 100 is mixed. Mass part, particle size 20nm citric acid gel dispersion (trade name PL-2L-MEK, solid content concentration 20%, manufactured by Fuso Chemical Industry Co., Ltd.) 30 parts by mass, photopolymerization initiator (trade name IRGACURE 184, BASF Co., Ltd. manufactured) 4 parts by mass. The resin layer-forming composition D was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition D for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition D applied to the substrate was cured to have a resin layer having a thickness of 5 μm. Thus, the resin film D1 was obtained.

(Production of Resin Film E1)

As a polyfunctional (meth) acrylate, dipentaerythritol hexaacrylate (6-functional acrylate, trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.) is mixed with 100 parts by mass of 1400 nm cerium oxide particles. (product name: Sylysia 310, manufactured by Fujisawa Chemical Co., Ltd.) 6 parts by mass of a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Corporation) of 4 parts by mass. The resin layer-forming composition E was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition E for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Thereafter, for the substrate, a high-pressure mercury lamp ultraviolet irradiation machine (EYE GRAPHICS Co., Ltd.) was used. Was manufactured by the company, irradiated with ultraviolet light at 160 W/cm, lamp height 13 cm, belt speed 10 m/min, 2 pass, and nitrogen atmosphere. Thereby, the composition E applied to the substrate was cured to have a resin layer having a thickness of 5 μm. Thus, the resin film E1 was obtained.

(Production of Resin Film F1)

As a polyfunctional (meth) acrylate, a mixture of dipentaerythritol hexaacrylate (6-functional acrylate, trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.), 100 parts by mass, 4100 nm of cerium oxide particles (product name: Sylysia 430, manufactured by Fujisawa Chemical Co., Ltd.) 6 parts by mass of a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Corporation) of 4 parts by mass. The resin layer-forming composition F was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition F for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition F applied to the substrate is cured to have a resin layer having a thickness of 5 μm. Thus, the resin film F1 was obtained.

(Production of Resin Film G1)

On a substrate of a PET film having a thickness of 100 μm, a composition having a refractive index of 1.65 (trade name: OPSTARORKZ 6719 solid content 20%, manufactured by JSR Co., Ltd.) was bar-coated. The substrate was dried by heating at 80 ° C for 60 seconds. Thereby forming a thickness of 0.2 μm High refractive layer. In the same manner as in the production of the resin film A1, the resin layer forming composition A is applied to the high refractive layer to form the resin film G1.

(Production of Resin Film H1)

As a polyfunctional (meth) acrylate, 100 parts by weight of dipentaerythritol hexaacrylate (6-functional acrylate, trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.), and a photopolymerization initiator are mixed. (trade name: IRGACURE 184, manufactured by BASF Co., Ltd.) 4 parts by mass. The resin layer-forming composition H was prepared by diluting the mixture with methyl ethyl ketone so that the solid content concentration became 50%.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. A composition H for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition H applied to the substrate is cured to have a resin layer having a thickness of 5 μm. Thus, the resin film H1 was obtained.

(Production of Resin Film I1)

As a polyfunctional (meth) acrylate, 100 parts by mass of tannic acid having a particle diameter of 10 nm is mixed with dipentaerythritol hexaacrylate (6-functional acrylate, trade name: A-DPH, manufactured by Shin-Nakamura Chemical Co., Ltd.). 10 parts by mass of a gel dispersion (organic hydrazine sol standard type, solid content concentration: 30%, manufactured by Nissan Chemical Industries Co., Ltd.), and a photopolymerization initiator (trade name: IRGACURE 184, manufactured by BASF Co., Ltd.) of 4 parts by mass. By using the methyl ethyl ketone as a solid content, the concentration is 50%. The composition for forming a resin layer I was prepared by dilution.

As the substrate, a PET film (trade name: A4300, manufactured by Toyobo Co., Ltd.) having a thickness of 100 μm was used. The composition I for forming a resin layer was applied to the substrate. Thereafter, the substrate was dried by heating at 80 ° C for 60 seconds. Then, the substrate was irradiated with ultraviolet rays using a high-pressure mercury lamp ultraviolet irradiation machine (manufactured by EYE GRAPHICS Co., Ltd.) at 160 W/cm, a lamp height of 13 cm, a belt speed of 10 m/min, 2 passes, and a nitrogen atmosphere. Thereby, the composition I applied to the substrate was cured to have a resin layer having a thickness of 5 μm. Thus, the resin film I1 was obtained.

(Method for measuring surface roughness)

The surface observation and image acquisition of each resin film were performed at a magnification of 200 times using a micro laser microscope (VK-X105 controller unit VK-X100 manufactured by KEYENCE Co., Ltd.). With respect to the obtained image, the measurement area was set to 100 μm × 100 μm, and the arithmetic mean surface roughness Ra was calculated based on JIS B0601:2001 using the analysis software attached to the above micro laser microscope.

<Evaluation of haze (transparency)>

The haze value of the obtained resin film and laminate was measured using NDH4000 manufactured by Nippon Denshoku Industries Co., Ltd. based on JIS K 7136.

<Evaluation of curl>

The obtained resin film was cut into a size of 100 mm in length × 100 mm in width, and allowed to stand in an environment of 23 ° C and a humidity of 50% RH for one day. Thereafter, the resin film was placed on a horizontal surface, and the ridges of the four corners were measured. The ridges of the four corners are at a distance from the horizontal plane in the direction perpendicular to the horizontal plane to the four corners of the resin film. The average value is calculated as the curl. The case where the curl was 0 to 10 mm was evaluated as ○. The case where the curl was 11 mm or more was evaluated as ×.

<Evaluation of Newton's Ring Generation>

Two resin films were prepared so that the respective resin layers were placed in a state of being opposed to each other, and pressed against the opposite surface of the resin layer by fingers. Thereafter, the stress was released, and it was visually confirmed whether or not a Newton's ring was generated after 5 seconds. At this time, the case where the Newton's ring was not generated was evaluated as ○. Moreover, the case where the Newton's ring was produced or the case where the resin film adhered to each other was evaluated as ×.

<Example 1>

Two resin films A1 were prepared so that the respective resin layers were arranged to face each other, and a laminate was produced.

<Example 2>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film B1.

<Example 3>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film C1.

<Example 4>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film D1.

<Example 5>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film G1.

<Example 6>

A laminate was produced in the same manner as in Example 1 except that one of the two resin films A1 was changed to the resin film B1.

<Example 7>

A laminate was produced in the same manner as in Example 1 except that one of the two resin films A1 was changed to the resin film C1.

<Example 8>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film A2.

<Comparative Example 1>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film H1.

<Comparative Example 2>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film I1.

<Comparative Example 3>

A laminate was produced in the same manner as in Example 1 except that one of the two resin films A1 was changed to the resin film I1.

<Comparative Example 4>

A laminate was produced in the same manner as in Example 2 except that one of the two resin films B1 was changed to the resin film I1.

<Comparative Example 5>

Change two of the two resin films A1 to the resin film A3, and In the first embodiment, a laminate was produced in the same manner.

<Comparative Example 6>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film A4.

<Comparative Example 7>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film E1.

<Comparative Example 8>

A laminate was produced in the same manner as in Example 1 except that the two resin films A1 were changed to the resin film F1.

100‧‧‧Anti-Newtonian ring laminate

110‧‧‧1st floor

111‧‧‧Substrate

112‧‧‧ Surface shape of the bump

120‧‧‧2nd floor

121‧‧‧Substrate

122‧‧‧ Surface shape of the bump

Claims (7)

A laminated body comprising a first layer having a surface shape having irregularities on at least one surface, and a second layer having a surface shape having irregularities on at least one surface, and a surface shape of the unevenness of the first layer and the second layer The surface shape of the unevenness has a thickness of 1 to 6 μm, a surface roughness of more than 10 nm and less than 60 nm, and a surface shape of the unevenness of the first layer is opposite to a surface shape of the unevenness of the second layer and a surface shape of the uneven surface The way of mutual contact is layered. The laminate according to claim 1, wherein the first layer and/or the second layer contains inorganic or organic fine particles having a particle diameter of 20 to 250 nm. The laminate according to claim 1 or 2, wherein the uneven surface of the first layer and/or the uneven surface of the second layer are separated by a resin composition containing at least two components to form irregularities. The laminate according to any one of claims 1 to 3, wherein, in the uneven surface of the first layer and the uneven surface of the second layer, an uneven surface is an uneven resin containing inorganic or organic fine particles having a particle diameter of 20 to 250 nm. The other uneven surface is an uneven resin layer formed by phase-separating a resin composition containing at least two components. The laminate according to any one of claims 1 to 4, wherein the first layer and the second layer have a haze of more than 0.6 and less than 7.0. A display device incorporating the laminate of any one of claims 1 to 5. An optical film for incorporating a display device having a touch panel function, wherein the optical film has a surface shape having at least one surface on one side, and a surface having a surface shape having a concave and convex surface has a surface roughness greater than The optical film is at least two or more in the same display device, and is disposed such that the surface shapes of the concavities and convexities are in contact with each other.