KR20120122935A - Hard coat film and touch panel using the same - Google Patents

Abstract

PURPOSE: A hard coat film and a touch panel using the same are provided to prevent bubble generation in a corner unit which a printing gap is generated when the hard coat film having an adhesive layer in which a black frame and/or an icon are printed is welded to the touch panel. CONSTITUTION: A hard coat layer is included in both sides of a transparent resin film. A printing layer of a black frame and/or an icon is formed on the hard coat layer of one side. An adhesive layer composed of a photopolymer resin composition including a photopolymerization initiator is formed in an expressed part of the hard coat layer which the printing layer is not formed. The adhesive layer additionally covers a surface of the printing layer.

Description

Hard coat film and touch panel using this {HARD COAT FILM AND TOUCH PANEL USING THE SAME}

The present invention relates to a hard coat film. In the present invention, when the hard coat film on which the black frame and / or the icon is printed is bonded to the touch panel, bubbles are not generated in the corner portion where the printing step occurs. And it provides the hard coat film provided with the OCA layer which can improve visibility, and the touch panel using the same.

In the description in the present specification, OCA means an optically clear adhesive (abbreviation for optically clear pressure sensitive adhesive). In the following description, it may describe as optically transparent adhesive or OCA.

Conventionally, the touch panel which bonded the hard-coat film on which the icon which instructed the operation method was printed on the surface of a touch panel is known (for example, refer patent document 1 and 2).

As a display (display apparatus) to which a touch panel is applied, a liquid crystal display (LCD), an electroluminescence display (inorganic EL, organic EL), etc. are mentioned. Moreover, as a specific electronic device in which the said touch panel is used, a liquid crystal television, a portable terminal, a mobile telephone, electronic paper, an electronic book terminal, a personal computer, etc. are mentioned.

By the way, in patent document 1, when bonding the hard-coat film which printed the icon to the surface of a touch panel with an adhesive, when the step | step between the icon printed part and its periphery shall be 5 micrometers or less, at the time of bonding, It is described that the generation of bubbles can be prevented.

Further, in bonding the hard coat film on which the icon instructing the operation method is printed to the surface of the touch panel, there are various studies to prevent the mixing of bubbles due to the printing step of the icon. It is tried (for example, refer patent document 3-7).

Japanese Patent Laid-Open No. 2003-036143 Japanese Patent Publication No. 2004-213187 Japanese Patent Publication No. 2009-098324 Japanese Patent Publication No. 2010-176111 Japanese Patent Publication No. 2010-072471 Japanese Patent Publication No. 2010-097070 Japanese Patent Publication No. 2010-239324

However, in the case of the touch panel described in Patent Literature 3, bonding the light transmitting member (corresponding to the hard coat film) to the surface of the touch panel through the adhesive layer and the pressure-sensitive adhesive layer requires additional effort, thereby increasing the price. Cause. In addition, there is a problem in that it is not possible to employ a cheap display device. Moreover, in the display apparatus of patent document 3, the light shielding layer whose thickness is about 5-10 micrometers is formed so that the circumference | surroundings of a liquid crystal device may be enclosed. Moreover, the adhesive bond layer and the adhesive layer area are arrange | positioned so that the influence of the printing step of a light shielding layer may not be affected.

In addition, Patent Document 4 discloses that a transparent protective plate made of an acrylic resin or a polycarbonate resin and a step between the printing portion are filled with a transparent resin to be flattened, and a double-sided tape or an adhesive having transparency is used to bond the protective plate to the display surface. Is disclosed. According to patent document 4, it is said that it is preferable to make thickness of the photocurable resin which fills a printing step into thickness twice or more of the thickness of a printing layer. However, the detailed method of planarization performed using photocurable resin is not specifically described.

Further, in Patent Document 5, bonding a surface protective layer (corresponding to a protective film) having a light shielding layer (corresponding to a printed layer of an icon) to the surface of the touch panel via an adhesive layer having a specific storage modulus. Is disclosed. When such an adhesive layer is used, it is supposed that air bubbles are not generated. Moreover, after bonding a surface protection layer to a touch panel, it is supposed that it irradiates an ultraviolet-ray from the opposite side of a surface protection layer or a touch panel, and hardens an adhesive. However, there is a fear that ultraviolet rays may not be properly irradiated behind the light shielding layer.

Further, Patent Document 6 bonds a surface transparent plate (corresponding to a protective film) having a black printing layer (corresponding to a printing layer of an icon) to the surface of the touch panel through a transparent adhesive sheet having a specific storage modulus. Is disclosed.

In addition, it is said that bubbles are not generated in the adhesive surface between the liquid crystal display panel and the plastic plate (protective transparent plate). However, since the protective transparent plate made of transparent plastic is adhered to the liquid crystal panel through the transparent pressure-sensitive adhesive sheet, it is inevitable that air bubbles remain at the corners where the step of the black print layer is formed.

In addition, Patent Document 7 discloses bonding a design panel having an outer frame to a touch panel via a double-sided tape.

Since the bonding surface of a double-sided tape becomes substantially planar as a whole, it is said that an air bubble does not arise between a design panel and a double-sided tape. However, since the design panel is bonded to the touch panel via the double-sided tape, bubbles remain unavoidable in the corner portion where the step of the printing layer of the outer frame portion occurs.

As described above, in the prior art, when the hard coat film printed with the black frame and / or the icon is bonded to the touch panel, bubbles cannot be prevented from occurring in the corner portion where the printing step occurs. In addition, a method of manufacturing a hard coat film capable of increasing visibility is not known, and thus, such an improved hard coat film and a touch panel using the same cannot be provided.

That is, an object of the present invention is to prevent bubbles from occurring in the corner portion where the printing step occurs when bonding the hard coat film printed with the black frame and / or the icon to the touch panel. And it provides a hard coat film provided with the OCA layer which can improve visibility, and a touchscreen using the same.

MEANS TO SOLVE THE PROBLEM In order to solve the said subject, this invention has a hard-coat layer in one side of a transparent resin film, and the black layer and / or the printed layer of an icon are formed in the other side, and the said printing of said other side The hard coat film in which the adhesive layer which consists of a photocurable resin composition containing a photoinitiator is provided in the part in which a layer is not formed is provided.

In addition, the present invention has a hard coat layer on both sides of the transparent resin film, the print layer of the black frame and / or icon is formed on the hard coat layer on one side, wherein the printing layer of the one side The hard coat film in which the adhesive layer which consists of a photocurable resin composition containing a photoinitiator is provided in the exposed part of the said hard-coat layer which is not formed.

Moreover, it is preferable that the said adhesive layer has coat | covered the surface of the said printing layer.

In addition, although the said photocurable adhesive composition may contain the organic solvent, the ultraviolet curable photocurable adhesive composition and urethane acrylate which consisted of the main body which consists of an acryl-type polymer, an acryl-type monomer, a crosslinking agent, and a photoinitiator are mentioned. It is more preferable that it is a non-solvent type, such as the ultraviolet curable photocurable resin which consists of the main body which consists of an acryl-type monomer, a crosslinking agent, and a photoinitiator.

In addition, the present invention provides a touch panel in which the hard coat film is bonded through the pressure-sensitive adhesive layer.

In addition, the present invention provides an electronic device with a built-in touch panel.

According to the present invention described above, when the hard coat film having a pressure-sensitive adhesive layer printed with a black frame and / or an icon is bonded to the touch panel, bubbles may be prevented from occurring in the corner portion where the printing step occurs. As a result, a hard coat film with improved visibility and a touch panel using the same can be provided.

In addition, the hard coat film of this invention can be used suitably as an icon sheet | seat bonded to the ITO surface of a scattering prevention film, especially a capacitive touch panel.

EMBODIMENT OF THE INVENTION Below, preferable embodiment of this invention is described.

The hard coat film of the present invention has a hard coat layer on one side of the transparent resin film, a black frame and / or an icon print layer is formed on the other side, and the print layer is formed on the other side. It is a hard coat film in which the adhesive layer which consists of a photocurable resin composition containing a photoinitiator is formed in the part which is not provided. In addition, the hard coat film of the present invention has a hard coat layer on both sides of the transparent resin film, and a black layer and / or an icon print layer is formed on the hard coat layer on one side, and among the one sides It is a hard coat film in which the adhesive layer which consists of a photocurable resin composition containing a photoinitiator is formed in the exposed part of the said hard-coat layer in which the said printing layer is not formed. More preferably, the pressure-sensitive adhesive layer is a hard coat film covering the surface of the printed layer of the black frame and / or the icon.

(Transparent resin film)

As a transparent resin film used for the hard-coat film of this invention, transparency made from a polyethylene terephthalate (PET) resin film, a polyethylene terephthalate (PEN) resin film, and a cyclic polyolefin (COP) system resin film It is preferable that it is one type chosen from the resin film group which has heat resistance. In particular, since the price is relatively inexpensive and the transparency is high, a polyethylene terephthalate (PET) resin film is suitably used.

10-250 micrometers is preferable and, as for the thickness of a transparent resin film, 30-200 micrometers is more preferable. When the thickness of a transparent resin film is thinner than 10 micrometers, since handleability is lacking, it is not preferable. Moreover, when the thickness of a transparent resin film is thicker than 250 micrometers, transparency will fall and a price will also become high. Moreover, since the processing suitability in a manufacturing process of a hard coat film worsens, it is not preferable. As mentioned above, it is preferable that it is 10-250 micrometers, and, as for the thickness of a transparent resin film, it is more preferable if it is 30-200 micrometers. Moreover, in order to improve the adhesiveness between a transparent resin film and a hard-coat layer, you may laminate | stack an appropriate easily adhesive resin layer on the surface of a transparent resin film. Moreover, you may perform surface treatment, such as a flame treatment, a corona treatment, and a plasma treatment. Moreover, you may provide an underlayer between a transparent resin film and a hard-coat layer.

(Pressure-sensitive adhesive layer)

The hard coat film according to the present invention has a hard coat layer on one side of the transparent resin film, and on the other side, a black layer and / or a print layer of an icon is formed, and the print layer is formed on the other side. The adhesive layer is formed in the part which is not made. Furthermore, it is preferable that the adhesive layer is also formed in the surface of a black frame and / or an icon printing layer. In order to form the said adhesive layer, acrylic adhesive compositions, such as a solvent type acrylic polymer, a solvent type acrylic syrup, a solventless acrylic syrup, and a solventless urethane acrylate, can be used.

(Acrylic polymer)

As the solvent-based acrylic polymer, at least one kind of alkyl (meth) acrylate represented by the following general formula [Formula 1] can be used as the acrylic monomer serving as a raw material. It is preferable that a hydrophilic monomer is copolymerized. This is because a higher functional acrylic pressure-sensitive adhesive layer can be formed by curing the acrylic polymer with a crosslinking agent such as isocyanate or epoxy resin.

(In formula, R <^1> represents hydrogen or a methyl group and R <^2> represents a C1-C14 alkyl group.)

The general formula CH ₂ = CR ¹ As the alkyl (meth) acrylate represented by -COOR ^2, specifically, methyl (meth) acrylate, ethyl (meth) acrylate, n- propyl (meth) acrylate, iso Propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, isopentyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate , Dodecyl (meth) acrylate, and the like. These can be used individually or in combination of 2 or more types. Among these, 2-ethylhexyl (meth) acrylate and n-butyl (meth) acrylate can be used preferably.

Further, the alkyl (meth) acrylate, from the viewpoint of the adhesive strength, the number of carbon atoms of the alkyl group (R ²⁾ 1? Is 14. Since the adhesive force may fall that carbon number of an alkyl group is 15 or more, it is unpreferable. The alkyl group (R ² ) preferably has 1 to 12 carbon atoms, more preferably 4 to 12 carbon atoms, and most preferably 4 to 8 carbon atoms.

In addition, among the alkyl (meth) acrylates having 1 to 14 carbon atoms of the alkyl group (R ² ), an alkyl (meth) acrylate having 1 to 3 or 13 to 14 carbon atoms of the alkyl group (R ² ) is used as part of the monomer. but also, it is preferable to use the carbon number of the alkyl group (R ²⁾ 4? 12 alkyl (meth) acrylate as required (for example, 50? 100 mol%). For reference, such an alkyl group (R ² ) may be linear or branched.

In addition, in order to polymerize alkyl (meth) acrylate, although it can carry out by well-known methods, such as solution polymerization, block polymerization, suspension polymerization, and emulsion polymerization, solution polymerization which is easy to remove heat can be used suitably. have. Examples of the organic solvent used in the solution polymerization reaction include aromatic hydrocarbons such as toluene and xylene, aliphatic esters such as ethyl acetate and butyl acetate, alicyclic hydrocarbons such as cyclohexane, and aliphatic hydrocarbons such as hexane and pentane. Although these etc. are mentioned, if it does not inhibit the said polymerization reaction, it will not specifically limit. Only 1 type may be used for such a solvent, and may be used for it in mixture of 2 or more types. What is necessary is just to determine the usage-amount of a solvent suitably.

In general, in the solution polymerization reaction, the higher the polymerization temperature, the lower the molecular weight of the polymer produced. When the polymerization reaction is carried out at the reflux temperature of the solvent, a polymer can be obtained while removing the heat of polymerization reaction by using a solvent having a boiling point suitable for the polymerization reaction.

(Acrylic syrup)

Moreover, as a solvent type acrylic polymer, even if it is an acryl syrup which adds the acryl-type monomer as shown in said structural formula [Formula 1], and coats and forms it as it is, it irradiates and hardens | cures UV and etc. after that. By adding the monomer, for example, in the durability test under high temperature and high humidity, it becomes possible to have an effect of preventing cloudiness. Moreover, the function which is not expressed only by an acryl-type polymer can be provided. Even in the same acrylic syrup, the polymerization reaction can be carried out without using an organic solvent, or the organic solvent used after the polymerization reaction can be removed to form a solvent-free acrylic syrup.

In consideration of productivity and processing suitability, a UV-curable pressure-sensitive adhesive composition is more suitable than a solvent-based pressure-sensitive adhesive composition. In the case of the solvent-based pressure-sensitive adhesive composition, a facility for volatilizing the solvent and a treatment time for volatilizing the solvent are required. In addition, the thickness of the pressure-sensitive adhesive layer after drying becomes thinner by the weight loss due to evaporation of the solvent, and the shrinkage in the thickness direction is large (solvent cutback). For this reason, the display portion has a larger absolute value of thickness shrinkage than the print portion of the black frame. As a result, reducing the difference in thickness between the display portion and the printed portion after coating the adhesive layer, which is the object of the present invention, is improved rather than bonding the adhesive tape. However, the difference in thickness tends to occur as much as the solvent evaporates and the film thickness becomes thinner. In order to reduce the thickness difference due to evaporation of the solvent and the thickness becomes as small as possible, it is preferable to reduce the solvent content in the pressure-sensitive adhesive composition, and to eliminate the solvent component. For this reason, in this invention, it is preferable to use a solventless type, such as a solventless acrylic syrup and a solventless urethane acrylate, as a subject of an adhesive composition.

(Urethane acrylate)

Examples of the urethane acrylate include compounds having one or more (meth) acryl groups in one molecule, which are obtained by reacting two or more moles of hydroxy group-containing acrylic monomers with respect to one mole of a compound having two or more NCO groups in one molecule. have. Here, as a hydroxyl group containing acrylic monomer, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, polyethyleneglycol mono (meth) acrylate, And hydroxyl group-containing (meth) acrylates such as polypropylene glycol mono (meth) acrylate and cyclohexanedimethanol mono (meth) acrylate.

Moreover, as a compound which has two or more NCO groups in 1 molecule, the oligomer whose molecular weight is about 500-50000 obtained by making polyisocyanate compounds, such as diisocyanate, and polyol compounds, such as diol, react is preferable.

Examples of the polyisocyanate compound include aliphatic polyisocyanates such as hexamethylene diisocyanate and isophorone diisocyanate, and aromatic polyisocyanates such as triylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate and phenylene diisocyanate.

Examples of the polyol compound include glycols such as ethylene glycol, propylene glycol, tetramethylene glycol, hexamethylene glycol, neopentyl glycol and 1,4-cyclohexanedimethanol; Trivalent or higher polyols such as glycerin and pentaerythritol; Polyether diols such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol and polyhexamethylene glycol; And polyester diols obtained by reacting the diols with dibasic acids such as phthalic acid, isophthalic acid, terephthalic acid, maleic acid, fumaric acid, adipic acid and sebacic acid.

In the pressure-sensitive adhesive composition of the present invention, at least one kind of (meth) acrylate may be contained in at least one kind of urethane acrylate. Other monomers may be added in addition to the extent that the effects of the present invention are not impaired. As (meth) acrylate, for example, alkyl represented by the general formula CH ₂ = CR ¹ -COOR ² (wherein R ¹ represents hydrogen or a methyl group, R ² represents an alkyl group having 1 to 14 carbon atoms); Acrylic monomers, such as meth) acrylate, are mentioned. Examples of the general formula CH ₂ = CR ^1, alkyl (meth) acrylate represented by -COOR ^2, specifically, methyl (meth) acrylate, ethyl (meth) acrylate, n- propyl (meth) acrylate , Isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, isopentyl (meth) acrylic Latex, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) Acrylate, dodecyl (meth) acrylate, and the like. These can be used individually or in combination of 2 or more types. Among these, 2-ethylhexyl (meth) acrylate and n-butyl (meth) acrylate can be used preferably. For reference, these alkyl groups (R ² ) may be linear or branched. In addition, as a non-acrylic-type monomer containing an alkoxy silyl group, vinyl methoxysilane, vinyl trimethoxysilane, etc. are mentioned, for example.

Moreover, various compounds, such as a nonacryl-type monomer, can be used. As for the addition monomer, the monofunctional monomer which has one photopolymerizable group, such as a (meth) acryl group and a vinyl group, per molecule is preferable.

The adhesive composition used by this invention plays a role of the diluent which lowers a viscosity at the time of application | coating process, and it is usual to contain at least 1 type of acrylic monomer. If the acrylic monomer component is added too much, the amount of UV irradiation needs to be increased, so that the amount of the acrylic monomer added is 50% by weight or less, more preferably 30% by weight or less of the resin component.

In addition, in the solvent type acrylic polymer and the solvent type acrylic syrup, the organic solvent remains in resin. The remaining organic solvent fouls the print layer of the hard coat film in which the print layer of the black frame was formed. For this reason, the solvent for coating material of a printing layer raises solvent resistance in advance using a UV hardening | curing agent or a crosslinking agent.

In addition, after addition of a photoinitiator, a urethane acrylate type UV curable resin and an acrylic syrup have a possibility that a polymerization reaction may progress if ultraviolet light contained in room light or sunlight acts on the acrylic syrup, and management becomes difficult. . For this reason, it is preferable to add a photoinitiator just before possible as soon as possible of the application | coating process which is a subsequent process. This is similarly handled even when the acrylic syrup is a resin solution dissolved in an organic solvent. Care should be taken that the photopolymerization initiator does not start the reaction before application or film formation due to any external factors.

(Hard coat layer)

In the hard coat film of this invention, the hard coat layer formed in a transparent resin film should just be hard-coat property enough to be usable as the surface material of a touchscreen, and when the measured value in a pencil hardness test is 2H or more normally, There is no problem in practical use. There is no restriction | limiting in particular in resin used for a hard-coat layer, A thermosetting hard-coat resin, such as silicone type and a melamine type, and ultraviolet curing hard coat resin, such as a silicone type and an acryl type, can be used. In the hard coat film of the present invention, a hard coat layer is formed on one surface or both surfaces of the transparent resin film. When the hard coat layer is formed only on one side of the transparent resin film, warpage or deformation due to thermal expansion tends to occur. For this reason, when an inexpensive hard coat film is needed, it can be used. If price is not given priority over performance, it is preferable to form a hard coat layer on both surfaces of the transparent resin film.

Moreover, it is preferable that it is 1-10 micrometers, and, as for the thickness of a hard-coat layer, it is more preferable if it is 2-8 micrometers. If the thickness of the hard coat layer is thinner than 1 μm, hard coat properties cannot be obtained and scratch resistance is reduced. For this reason, when using an ultraviolet curing hard-coat resin, it becomes easy to produce a hardening defect.

In addition, when the thickness of the hard coat layer is thicker than 10 µm, cracks tend to occur in the hard coat layer. Moreover, since curls tend to occur in the hard coat film itself, it is not preferable.

In addition, you may add the additive for providing various functions, such as an antistatic agent and a ultraviolet absorber, to a hard-coat layer as needed. As a method of forming a hard coat layer on the surface of a transparent resin base material, conventionally well-known methods, such as a reverse coating method, the die coating method, and the gravure coating method, can be used.

In addition, when a printing layer and an adhesive layer are laminated | stacked on a hard-coat layer, the base layer of moderate easily adhesive on the surface of a hard-coat layer for the purpose of improving the adhesiveness between a hard-coat layer, a printing layer, and an adhesive layer. You may laminate | stack. Moreover, you may surface-treat, such as a flame treatment, a corona treatment, and a plasma treatment.

(Printed layer of black frame and / or icon)

The present invention has a hard coat layer on one side of the transparent resin film, and a black frame and / or a printing layer of an icon is formed on the other side, and on the other side of the portion where the printing layer is not formed. And the hard coat film in which the adhesive layer for bonding to a touchscreen etc. is formed. In addition, the present invention has a hard coat layer on both sides of the transparent resin film, the print layer of the black frame and / or icon is formed on the hard coat layer on one side, wherein the printing layer of the one side It relates to the hard coat film in which the adhesive layer for bonding to a touchscreen etc. is formed in the exposed part of the said hard coat layer which is not formed.

In the hard coat film which concerns on this invention, the black frame formed by the printing layer leaks the illumination light irradiated from the display panel (backlight of a liquid crystal panel, etc.) provided in the back of a touch panel from the periphery of a display panel. Suppress what happens. For this reason, in order to shield the periphery of a display panel, it is provided. In addition, the icons formed by the printed layer are fixedly frequently used among icons (displays of patterns, characters, symbols, etc. for inputting or selecting specific functions, operations, items, etc.) displayed on the screen of the touch panel. It is installed to display.

Formation of a black frame and / or an icon by a printing layer is performed by apply | coating and drying the coating material which consists of a resin composition containing a light-shielding black pigment by screen printing, intaglio printing, etc., and forming a light-shielding film. As the black pigment, one or two or more kinds selected from the group consisting of carbon black, graphite, aniline black, cyanine black, titanium black, black iron oxide, chromium oxide and manganese oxide can be used in combination. Of these black pigments, in particular, carbon black is suitably used. The distribution range of the preferable particle diameter of a black pigment (light absorbing material) is the range of 0.01-0.5 micrometer, More preferably, it is the range of 0.05-0.3 micrometer. For reference, in order to adjust the color tone of a light shielding layer to achromatic color or a preferable color tone, you may use a some kind of different color material. In addition, in order to form a black frame by a printing layer, for example, the black frame can be formed by using the acrylic resin paint which disperse | distributed carbon black as a black pigment, and making the film thickness of a printing layer into 10-50 micrometers. . Such a printed layer need not be limited to black, and it is possible to select various colors, such as glossy resin, white, and various chromatic colors.

By the way, the hard-coat film of this invention has a hard-coat layer in one side of a transparent resin film, The black layer and / or the printing layer of an icon are formed in the other side, and the said printing layer of the other side is Furthermore, the adhesive layer which consists of a photocurable resin composition containing a photoinitiator is formed also in the part which is not formed, also on the surface of the printing layer of a frame and / or an icon. In addition, the hard coat film of the present invention has a hard coat layer on both sides of the transparent resin film, and a black layer and / or an icon print layer is formed on the hard coat layer on one side, and among the one sides The pressure-sensitive adhesive layer made of a photocurable resin composition containing a photopolymerization initiator is formed on an exposed portion of the hard coat layer in which the print layer is not formed.

For this reason, in the work process of joining the hard-coat film of this invention to a to-be-adhered body, in order to prevent dust etc. which adhere to the surface of an adhesive layer from adhering to a to-be-adhered body, it is an adhesive until just before bonding to a to-be-adhered body. It is preferable to laminate | stack and store the peeling film (also called a "protective film") peeled off on the surface of a base material on a layer. Although it becomes a factor of a cost increase, it is preferable that the hard coat film of this invention ships a product in the state which bonded the peeling film on the adhesive layer. At the time of the quality inspection after manufacturing the hard coat film of this invention, a peeling film makes it possible to test | inspect and confirm the adhesion of dust etc. and the presence or absence of the contamination. For this reason, it is preferable to apply | coat a peeling agent to a transparent resin film, and to carry out peeling process. As a transparent resin film, a polyethylene terephthalate (PET) resin film is used suitably because a price is comparatively cheap and since transparency is high. It is preferable that it is 10-250 micrometers, and, as for the thickness of a transparent resin film, it is more preferable if it is 30-200 micrometers. In addition, the method of peeling processing is not specifically limited, You may use the silicone type | system | group peeling agent, addition reaction type | mold silicone type | system | group peeling agent which are already widely used.

(Bridge)

You may add a crosslinking agent to the photocurable resin composition used for the hard coat film of this invention in order to bridge | crosslink an acrylic polymer as an arbitrary component. The base number of the functional group contained in a crosslinking agent is selected by the physical property of the required adhesive composition, and it is possible to adjust the addition amount of a crosslinking agent as needed.

As a bifunctional crosslinking agent, if it is a compound which has two functional groups in crosslinking reaction in 1 molecule, it will not specifically limit. As such a bifunctional crosslinking agent, a bifunctional epoxy compound, a bifunctional isocyanate, etc. are mentioned, for example.

As a bifunctional epoxy compound, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, dipropylene glycol diglycidyl ether, poly Aliphatic bifunctional epoxy compounds, such as propylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and 1, 6- hexanediol diglycidyl ether, and a hydrogenated bisphenol A diglycidyl Aromatic bifunctional epoxy compounds, such as ether, o-phthalic acid diglycidyl ester, terephthalic acid diglycidyl ester, and resorcin diglycidyl ether, are mentioned. The epoxy group of the bifunctional epoxy compound can crosslink with the carboxy group of the acrylic polymer.

Examples of the difunctional isocyanate include aliphatic difunctional isocyanates such as hexamethylene diisocyanate and isophorone diisocyanate (IPDI), and aromatic difunctional isocyanates such as triylene diisocyanate and diphenylmethane diisocyanate. The NCO group of the bifunctional isocyanate can crosslink with the carboxy group and the hydroxyl group of the acrylic polymer.

0.5-3.0 weight part is preferable with respect to 100 weight part of acrylic polymers, and, as for content of a bifunctional crosslinking agent to 0.1 equivalent or less with respect to the crosslinking point of an acrylic polymer, 1.0-3.0 weight part is more preferable.

The number of functional groups is not limited to bifunctional, In order to adjust to the physical property (adhesive force, hardness, etc.) of the required adhesive composition, it is possible to use a trifunctional or more than trifunctional crosslinking agent.

(additive)

In the adhesive layer used for the hard coat film of this invention, the adhesive force with respect to the to-be-adhered body of an adhesive is adjusted according to the state of a to-be-adhered body, or the adhesive force with respect to the to-be-adhered body of a glass plate is improved, or the durability of an adhesive layer is improved. From the standpoint of making it, etc., various additives such as a tackifier, a softener (plasticizer), a filler, an anti-aging agent and a silane coupling agent can be added as necessary.

Examples of the tackifier include rosin and its derivatives, polyterpenes, terpene phenol resins, coumarone-indene resins, petroleum resins, styrene resins and xylene resins. As a softener, liquid polyether, glycol ester, liquid polyterpene, liquid polyacrylate, phthalic acid ester, trimellitic acid ester, etc. are mentioned, for example.

(Photoinitiator)

The photocurable resin composition used for the hard coat film of this invention contains the photoinitiator (polymerization catalyst). Although the said photoinitiator (polymerization catalyst) is not specifically limited, For example, an acetophenone type photoinitiator, a benzoin type photoinitiator, a benzophenone type photoinitiator, a thioxanthone type photoinitiator, a thioxanthone type photoinitiator, etc. are mentioned. .

Examples of the acetophenone-based photopolymerization initiator include acetophenone, p- (tert-butyl) 1 ', 1', 1'-trichloroacetophenone, chloroacetophenone, 2 ', 2'-diethoxyacetophenone and hydroxyacetophenone. And 2,2-dimethoxy-2'-phenylacetophenone, 2-aminoacetophenone, dialkylaminoacetophenone and the like.

As a benzoin type photoinitiator, benzyl, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy 2-methyl- 1-phenyl-2-methylpropan-1-one, 1- (4-isopropylphenyl) -2-hydroxy2-methylpropan-1-one, benzyl dimethyl ketal, etc. are mentioned.

Examples of the benzophenone photopolymerization initiators include benzophenone, benzoyl benzoic acid, methyl benzoyl benzoate, methyl-o-benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, hydroxypropylbenzophenone, acrylbenzophenone, and 4,4 '. -Bis (dimethylamino) benzophenone etc. are mentioned.

As a thioxanthone type photoinitiator, a thioxanthone, the 2-chloro thioxanthone, the 2-methyl thioxanthone, the diethyl thioxanthone, the dimethyl thioxanthone, etc. are mentioned.

As other photoinitiators, (alpha)-acyl oxime ester, benzyl- (o-ethoxycarbonyl)-(alpha)-monooxime, acyl phosphine oxide, glyoxy ester, 3-ketocoumarin, 2-ethyl anthraquinone, camphor Quinone, tetramethylthioramsulfide, azobisisobutyronitrile, benzoyl peroxide, dialkyl peroxide, tert- butyl peroxy pivalate, etc. are mentioned.

Only one type may be used for such a photoinitiator, and may use two or more types together. It is preferable that it is 0.005-5 mass%, and, as for content of a photoinitiator, in the weight percentage which makes 100 mass% whole quantity of a polymeric compound, it is especially preferable that it is 0.01-2 mass%. If content of a photoinitiator is 0.005 mass% or more, a polymeric compound can be superposed | polymerized in a short time, and if it is 5 mass% or less, the dregs of a photoinitiator are hard to remain in hardened | cured material.

In the hard coat film which has a hard-coat layer in one side of a transparent resin film, and the printing layer of a black frame and / or an icon is formed in the other side, the photocurable resin composition containing a photoinitiator is in the said other side. It applies to the whole part in which the said printing layer is not formed. Moreover, after apply | coating the said photocurable resin composition also to the surface of the said printing layer, the coating film of a photocurable resin composition is photocured and an adhesive layer is formed. In addition, in the hard-coat film which has a hard-coat layer in the both sides of a transparent resin film, and the printed layer of a black frame and / or an icon is formed on the said hard-coat layer of one side, photocurable resin containing a photoinitiator. The composition is applied to the entirety of the exposed portion of the hard coat layer in which the printing layer is not formed on the one side. Moreover, after apply | coating the said photocurable resin composition also to the surface of the said printing layer, the coating film of a photocurable resin composition is photocured and an adhesive layer is formed. It is easy to apply | coat the photocurable resin composition before photocuring so that air may not collect or contain a bubble. After apply | coating a photocurable resin composition, it hardens | cures by light irradiation and increases a viscosity, and can produce a hard-coat film which has an adhesive layer in the part in which the printing layer is not formed. Moreover, when an adhesive layer further covers the surface of a printing layer, the hard coat film which has an adhesive layer of a different thickness can be manufactured between the part in which the printing layer is not formed, and the part in which the printing layer was formed. .

As described above, the pressure-sensitive adhesive layer formed by the photocuring method has a physical uneven shape and optical distortion of the pressure-sensitive adhesive surface (the surface opposite to the side of the transparent resin film and the side in contact with the printing layer). This is small. For this reason, compared with before forming an adhesive layer, the physical unevenness | corrugation shape and optical distortion in the other side of a hard coat film can be reduced.

[Example]

EMBODIMENT OF THE INVENTION Below, this invention is demonstrated concretely based on an Example.

<Production of hard coat film having print layer>

Hard coat film (Toyo Hozai Co., Ltd. make, product name DH / A-6188) which uses a polyethylene terephthalate (PET) resin film whose thickness is 188 micrometers as a transparent resin film, and a hard coat layer is formed in both surfaces. On one side, the black pigment-based ink (Seiko Advance Co., Ltd., HAC series, Concentrated 710 Black) was printed and dried so that thickness after drying might be set to 15 micrometers and 41 micrometers, respectively. As a result, a hard coat film (A) (print layer thickness: 15 µm) and a hard coat film (B) (print layer thickness: 41 µm) having a black frame printed layer were obtained.

In the obtained hard coat films A and B, the thickness of the printing layer of the black frame was 15 µm and 41 µm, respectively, and the height of the step by the printing layer of the black frame was hereinafter referred to as "the height of the printing level". Have

(Measurement Method of Storage Modulus of Adhesive Layer)

After laminating a plurality of hard coat films to form a laminate having a predetermined thickness, the film was subjected to autoclave treatment (for 60 ° C. × 0.5 MPa × 30 minutes) to remove bubbles, and approximately 1 mm (thickness) × 20 mm (width). It cut to the size of (x) 20 mm (length), and produced the sample for dynamic viscoelastic test. The sample was subjected to a dynamic viscoelastic test under conditions of a frequency of 1 Hz in a linear region by a shear rheometer (manufactured by AntonPaar, apparatus name: viscoelasticity measuring device, model: MCR301). The measurement of storage elastic modulus read the value in room temperature 23 degreeC on the conditions of the temperature increase rate of 3 degree-C / min in the temperature range of -40 degreeC-+150 degreeC, and obtained the storage elastic modulus.

(Method of Measuring Adhesion to Transparent Resin Film)

The measuring method of the adhesive force with respect to a to-be-adhered body is as follows.

After peeling the separator (peel film) of the produced hard-coat film, applying a 2 kg load with a roller, and bonding to a glass plate, it was left to stand in 23 degreeC and 50% RH environment for 1 hour, It peeled at the peeling rate 300 mm / min, and the 180 degree peeling strength was measured.

(Example 1)

Hard coat film A (15 micrometers) which has a printing layer of a black frame whose length and width size are about 115 mm x about 60 mm (the size of the display area in a black frame is about 90 mm x about 53 mm) Urethane acrylate-based UV-curable resin composition containing urethane acrylate as a main component on the part where the black frame by the printing layer is not formed and the upper part of the black frame by the printing layer using a printing step). SAN-5 Corp. make, SN-5X, 6618) was apply | coated so that the thickness from the transparent resin film surface of the hard-coat film (A) which has a printing layer might be set to 35 micrometers after hardening, and the adhesive layer was laminated | stacked. Furthermore, in the atmosphere which purges with nitrogen gas, UV irradiation was performed, the urethane acrylate type UV curable resin composition was hardened | cured, the optically transparent adhesive layer was formed, and the hard coat film of Example 1 was obtained. When the storage elastic modulus of the adhesion layer used for the hard coat film of Example 1 obtained was measured, storage elastic modulus (G ') is 5.6 * 10 <^5> Pa, loss modulus (G ") is 4.1 * 10 <^5> Pa, and a glass plate It was 4.6 N / 25 mm when the adhesive force with respect to was measured.

Moreover, about the hard-coat film of Example 1, in the surface of the transparent adhesive layer for optics, when the thickness from the surface of the base material of the hard-coat film of the part which a black frame is not printed and the black frame part was measured, 35.2 micrometers and 35.5 micrometers, respectively, and the difference was 0.3 micrometers. Therefore, in the hard coat film of Example 1, the distance of a printing step is more than 15 micrometers which is the distance of the printing step in the hard-coat film (A) which has a printing layer before laminating an optically transparent adhesive layer. Could be significantly reduced.

(Example 2)

Hard coat film (B) (41 micrometers) which has a printing layer of a black frame whose length and width size are about 115 mm x about 60 mm (the size of the display area in a black frame is about 90 mm x about 53 mm) Using a printing step), a urethane acrylate-based UV-curable resin composition (C-M, T-480 type) containing urethane acrylate as a main component is not formed with a black frame by a printing layer. Except for forming the pressure-sensitive adhesive layer by applying the adhesive layer so as to have a thickness from the transparent resin film surface of the hard coat film (B) having the printing layer on the upper portion of the black frame by the printing layer and the printing layer to be 70 µm after curing. By the same method as Example 1, the transparent adhesive layer for optics was formed, and the hard coat film of Example 2 was obtained.

When the storage modulus of the obtained hard coat film of Example 2 was measured, the storage modulus (G ′) was 4.3 × 10 ⁵ Pa, the loss modulus (G ″) was 2.5 × 10 ⁵ Pa, and the adhesive strength to the glass plate was 30.2 N / 25 mm.

Moreover, in the surface of the transparent adhesive layer for optics, when the thickness from the transparent resin film surface of the hard-coat film of the part and black frame part which a black frame is not printed was measured, respectively, it is 67.5 micrometers and 73.5 micrometers, respectively. The difference was 6.0 micrometers. Therefore, in the hard coat film of Example 2, the distance of a printing step is remarkable rather than 41 micrometers which is the distance of the printing step in the hard-coat film (B) which has a printing layer before laminating an optically transparent adhesive layer. Could be reduced.

(Example 3)

Hard coat film A (15 micrometers) which has a printing layer of a black frame whose length and width size are about 180 mm x about 115 mm (the size of the display area in a black frame is about 150 mm x about 85 mm). Urethane acrylate-based UV-curable resin composition containing urethane acrylate as a main component on the part where the black frame by the printing layer is not formed and the upper part of the black frame by the printing layer using a printing step). SAN-5 Corp. make, SN-5X, 6618) was apply | coated so that the thickness from the transparent resin film surface of the hard-coat film (A) which has a printing layer might be set to 50 micrometers after hardening, and the adhesive layer was laminated | stacked. Moreover, UV irradiation was performed in the atmosphere which purges with nitrogen gas, the urethane acrylate type UV curable resin composition was hardened | cured, the optically transparent adhesive layer was formed, and the hard coat film of Example 1 was obtained. When the storage modulus of the pressure-sensitive adhesive layer used in the obtained hard coat film of Example 1 was measured, the storage modulus (G ′) was 5.6 × 10 ⁵ Pa, the loss modulus (G ″) was 4.1 × 10 ⁵ Pa, and the glass plate It was 4.6 N / 25 mm when the adhesive force to was measured.

In addition, the obtained hard coat film of Example 3 measured the thickness from the base material surface of the hard-coat film in the part in which the black frame is not printed, and the black frame part in the surface of the transparent adhesive layer for optics, 50.0 micrometers and 53.5 micrometers, respectively, and the difference was 3.5 micrometers. Therefore, in the hard coat film of Example 3, the distance of a printing step is remarkable than 15 micrometers which is the distance of the printing step in the hard-coat film (A) which has a printing layer before laminating an optically transparent adhesive layer. Could be reduced.

(Example 4)

Hard coat film A (15 micrometers) which has a printing layer of a black frame whose length and width size are about 250 mm x about 190 mm (the size of the display area in a black frame is about 240 mm x about 160 mm). The hard coat film of Example 4 was obtained like Example 1 except having used the printing step.

In addition, the obtained hard coat film of Example 4 measured the thickness from the base material surface of the hard-coat film in the part in which the black frame is not printed, and the black frame part in the surface of the transparent adhesive layer for optics, 45.5 micrometers and 54.5 micrometers, respectively, and the difference was 9.0 micrometers. Therefore, in the hard coat film of Example 3, the distance of a printing step is remarkable than 15 micrometers which is the distance of the printing step in the hard-coat film (A) which has a printing layer before laminating an optically transparent adhesive layer. Could be reduced.

(Comparative Example 1)

After the surface treatment of the polyethylene terephthalate (PET) resin film having a length of about 115 mm x about 60 mm and a thickness of 50 µm, the surface of the polyethylene terephthalate (PET) resin is subjected to a silicone-based urethane acrylate as a main component. The acrylate UV curable resin composition was applied so that the thickness after curing would be 35 μm, and the pressure-sensitive adhesive layer was laminated. Moreover, it hardened | cured by performing UV irradiation in the atmosphere which purges with nitrogen gas, and the transparent adhesive layer for optics was formed. Subsequently, on the optically transparent adhesive layer, the peeling treatment with silicon was carried out so that a peeling treatment surface of a polyethylene terephthalate (PET) resin film having a thickness of 38 μm, in which a release agent layer was formed, was laminated together, thereby being used in Comparative Example 1 The transfer film (double-sided adhesive tape) of the transparent adhesive layer for optics was obtained.

The elastic modulus of the transfer film of the optically transparent adhesive layer according to Comparative Example 1 was measured, and the storage modulus (G ′) was 5.6 × 10 ⁶ Pa, and the loss modulus (G ″) was 4.1 × 10 ⁵ Pa, The adhesive force with respect to the glass plate was 4.6 N / 25 mm This was the same adhesive force as Example 1.

Using the obtained transfer film (double-sided adhesive tape) of the transparent adhesive layer for optics of the obtained comparative example 1, the hard-coat film (A) which has the optically transparent adhesive layer whose thickness is 35 micrometers has a printing layer of a black frame. The hard coat film of the comparative example 1 was obtained by laminating | stacking and laminating | stacking on the surface in which the printing layer (having a printing step of 15 micrometers) was formed.

The obtained hard coat film of the comparative example 1 measured the thickness from the base material surface of the hard-coat film of the part and the black frame part on which the black frame was not printed on the surface of the transparent adhesive layer for optics, respectively, 35.2 The difference was 15.3 µm at 5 µm and 50.5 µm. Therefore, in the hard coat film of the comparative example 1, by having the distance of the printing step which is substantially the same as the printing step in the hard-coat film (A) which has a printing layer before laminating an optically transparent adhesive layer, it is 15 micrometers, It did not reduce the distance of the printing step.

(Comparative Example 2)

Except having made thickness after hardening become 65 micrometers, the transfer film (double-sided adhesive tape) of the transparent adhesive layer for optics of the comparative example 2 was obtained by the method similar to the comparative example 1.

When the elasticity modulus of the transfer film of the transparent adhesive layer for optics of the comparative example 2 was measured, storage elastic modulus (G ') is 4.3x10 <^6> Pa, loss elasticity modulus (G ") is 2.5x10 <^5> Pa, and a glass plate The adhesive force with respect to was 30.2 N / 25 mm This was the same adhesive force as in Example 2.

Using the obtained transfer film (double-sided adhesive tape) of the transparent adhesive layer for optics of the obtained comparative example 2, the hard coat film (B) which has the optically transparent adhesive layer whose thickness is 41 micrometers has a printing layer of a black frame. The hard coat film of the comparative example 2 was obtained by laminating | stacking and laminating | stacking on the surface in which the printing layer (having a printing step of 41 micrometers) was formed.

When the obtained hard coat film of the comparative example 2 measured the thickness from the base surface of the hard-coat film of the part and the black frame part in which the black frame was not printed on the surface of the transparent adhesive layer for optics, respectively, 67.0 The difference was 40.2 µm at 10 µm and 107.2 µm. Therefore, in the hard-coat film of the comparative example 2, by having the distance of the printing step which is substantially the same as the printing step in the hard-coat film (B) which has a printing layer before laminating an optically transparent adhesive layer, 41 micrometers, The distance of the printing step could not be reduced.

In Table 1, about Examples 1-4 and Comparative Examples 1 and 2, the measurement result regarding the thickness of an adhesive layer, the distance of a printing step, etc. was shown.

Printing step between the base material of the hard coat film and the printing frame before laminating the pressure-sensitive adhesive layer
[Μm] Thickness of adhesive layer for optics
[Μm] Thickness distance between the substrate and the pressure-sensitive adhesive layer surface [μm] Printing step between substrate and printing frame of hard coat film with pressure-sensitive adhesive layer laminated
[Μm] Black frame Black frame Example 1 15 35 35.2 35.5 0.3 Example 2 41 70 67.5 73.5 6.0 Example 3 15 50 50.0 53.5 3.5 Example 4 15 45 45.5 54.5 9.0 Comparative Example 1 15 35 35.2 50.5 15.3 Comparative Example 2 41 65 67.0 107.2 40.2

(Bubble confirmation examination after bonding)

The hard coat films of Examples 1 to 4 and Comparative Examples 1 and 2 produced using a bonding apparatus (manufactured by Crim Products Co., Ltd., product name: small sheetfed bonding machine, model: SE320) were prepared using an ITO film ( Nakai Kogyo Co., Ltd. make, product name: Metaforce 125R2xA, surface resistance value 250 (ohm) / m <2>) was made to join the ITO surface of the glass plate bonded by the adhesive tape.

About the hard coat film of Examples 1-4, it could bond to the part with printing step between the transparent resin film and the black frame of a printing layer, without generating an air bubble. However, about the hard-coat films of Comparative Example 1 and Comparative Example 2, the printing step of the part with the printing step between the transparent resin film and the black frame of the printing layer could not be filled and bubbles were generated. In addition, about the hard-coat films of Comparative Example 1 and Comparative Example 2, although the bubble which generate | occur | produced as a whole was able to be reduced by the following autoclave process (40 degreeC x 0.5 mMpa x 15 minutes), it can be visually confirmed. Bubbles of the size remained. This is about the hard coat film of the comparative example 1, where the distance of adhesive thickness / printing step | step = 35 micrometers / 15 micrometers = 2.3, the adhesive thickness is large compared with the distance of printing step, and absorption of an unevenness | corrugation is easy, It is because adhesive force is low and an adhesive is hard. Moreover, about the hard-coat film of the comparative example 2, although adhesive force is high, the distance of adhesive thickness / printing step = 65 micrometers / 41 micrometers = 1.6, and the adhesive thickness is large compared with the distance of a printing step, and it is a cause which is difficult to absorb unevenness | corrugation. to be.

Japanese Patent Application No. 2010-026814, which is a patent application relating to the present invention, is made by the inventors of the present invention, and judging from the results of Example 8 disclosed in the application specification, it is used in the hard coat film of the present invention. When the storage modulus of the pressure-sensitive adhesive layer is applied, the thickness of the pressure-sensitive adhesive layer filling the printing step is considered to require a thickness that is 10 times or more of the printing step distance (for example, in Example 8 of the application specification, printing of 20 μm) Step is filled with an adhesive layer having a thickness of 200 μm). However, in the hard coat film of this invention, since the 125-micrometer-thick polyethylene terephthalate (PET) resin film which has flexibility and can be deformed flexibly is used for a transparent resin film, the adhesion which fills the step of printing is filled. Even if the thickness of the layer was less than 10 times the distance of the printing step, the bonding without filling the distance of the printing step was not possible.

In the hard coat film which has a conventional adhesive layer, when bonding to the to-be-adhered body which has a printing step, the adhesive layer and base film which comprise a hard-coat film were forcibly deform | bonded and bonded by using the flexible adhesive layer which strengthened adhesive force. . For this reason, not only the distortion of a base film but the part with a high density of an adhesive layer generate | occur | produces in the peripheral part of a printing step, but the density of an adhesive layer becomes low in the part separated from the peripheral part of a printing step.

As a result, due to the difference in density of the pressure-sensitive adhesive layer generated, the transmitted light may be refracted and the image from the image display body may be distorted. For example, when a hard coat film having a conventional pressure-sensitive adhesive layer is bonded to the surface of a display, the reflected light is distorted in the state where no image is displayed, and thus the designability is also lowered because the same smoothness as in the case of using glass is not obtained. do.

In the hard coat film according to the present invention, a portion where a step formed of a black layer and / or a print layer of an icon is not formed (a portion where an image of a display is displayed) and a portion where a black frame and / or an icon are printed ( In the part where the image of a display is not displayed), it has the adhesive layer of a different thickness. In addition, since the surface of the pressure-sensitive adhesive layer is in a state in which there is no difference in thickness than the distance of the printing step, the surface of the hard coat layer is reduced in physical irregularities and optical distortion.

In addition, the hard coat film according to the present invention can fill the printing step irrespective of the flexibility of the pressure-sensitive adhesive layer, so that not only a flexible pressure-sensitive adhesive layer having enhanced adhesive strength, but also a hard re-peelable pressure-sensitive adhesive layer or pressure-sensitive adhesive layer It is possible to use an adhesive layer having a very hard microadhesive force such that it is not transferred.

Moreover, when joining the hard-coat film of this invention to a to-be-adhered body, it is more preferable, because workability can be improved by using the said bonding apparatus, for example, without manual bonding.

Claims (6)

On one side of the transparent resin film, a hard coat layer is formed, and on the other side, a black frame and / or a printing layer of an icon is formed, and a photopolymerization initiator is formed on a portion of the other side where the printing layer is not formed. The hard coat film in which the adhesive layer which consists of a photocurable resin composition containing was formed. The hard coat layer has hard coat layers on both sides of the transparent resin film, and a print layer of a black frame and / or an icon is formed on the hard coat layer on one side, and the hard layer on which the print layer is not formed. The hard-coat film in which the adhesive layer which consists of a photocurable resin composition containing a photoinitiator is formed in the exposed part of a coat layer. 3. The method according to claim 1 or 2,
The hard coat film in which the said adhesive layer further coat | covers the surface of the said printing layer. 3. The method according to claim 1 or 2,
The hard coat film whose said photocurable adhesive composition is an ultraviolet curing photocurable adhesive composition containing the main body which consists of an acryl-type polymer, an acryl-type monomer, a crosslinking agent, and a photoinitiator. The touch panel in which the hard coat film as described in any one of Claims 1-4 was bonded through the said adhesive layer. An electronic device incorporating the touch panel according to claim 5.