JP4037066B2 - Functional film having functional layer and object provided with the functional layer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a functional film for transfer having a functional layer comprising a compressed layer of functional fine particles on a support, an object provided with the functional layer, and a method for producing an object provided with the functional layer. .
[0002]
The present invention relates to a functional film for transfer having a functional layer composed of a compressed layer of functional fine particles on a non-glare-treated support, more specifically, a functional layer composed of a compressed layer of functional fine particles on a target object. The present invention relates to a functional film for transfer that can be applied and non-glare treated. The present invention also relates to an object provided with the functional layer and subjected to non-glare treatment, and a method for manufacturing the same.
[0003]
In the present invention, the functional film includes both a functional film and a functional sheet. Moreover, what a support body is a metal is also contained in the functional film of this invention.
[0004]
  The functional layer is a layer having a function, and the function means a function performed through a physical and / or chemical phenomenon. Functional layers include conductive layer, ultraviolet shielding layer, infrared shielding layer, magnetic layer, ferromagnetic layer, dielectric layer, ferroelectric layer, electrochromic layer, electroluminescence layer, insulating layer, light absorption layer, light selection Absorption layer, reflection layer, antireflectionLayer, lightA layer having various functions such as a catalyst layer is included.
[0005]
In particular, the present invention relates to a functional film for transfer having a transparent conductive layer. In particular, the present invention relates to a functional film for transfer that can be used for an object typified by various displays that require non-glare treatment. More specifically, the present invention provides a transparent conductive layer to an object and performs non-glare treatment. The present invention relates to a functional film for transfer that can be applied. The transparent conductive layer can be used as a transparent electrode such as an electroluminescence panel electrode, an electrochromic element electrode, a liquid crystal electrode, a transparent surface heating element, and a touch panel, and can also be used as a transparent electromagnetic wave shielding layer.
[0006]
[Prior art]
Conventionally, functional layers made of various functional materials have been used for physical vapor deposition (PVD) methods such as vacuum deposition, laser ablation, sputtering, ion plating, and chemicals such as thermal CVD, photo CVD, and plasma CVD. Manufactured by chemical vapor deposition (CVD). These generally require a large-scale apparatus, and some are not suitable for forming a large-area film.
[0007]
It is also known to form a film by coating using a sol-gel method. The sol-gel method is suitable for forming a film having a large area, but in many cases, it is necessary to sinter the inorganic material at a high temperature after coating.
[0008]
For example, the transparent conductive layer is as follows. Currently, the transparent conductive layer is mainly produced by a sputtering method. There are various types of sputtering methods. For example, an inert gas ion generated by direct current or high frequency discharge in vacuum is accelerated and collided with the target surface, and atoms constituting the target are knocked out from the surface and deposited on the substrate surface. This is a method of forming a film.
The sputtering method is excellent in that a conductive layer having a low surface electrical resistance can be formed even if the surface has a relatively large area. However, there is a drawback that the apparatus is large and the film forming speed is slow. If the area of the conductive layer is further increased in the future, the apparatus will further increase. This causes a problem that technically the control accuracy must be increased, and a problem that the manufacturing cost increases from another viewpoint. Further, in order to compensate for the slow deposition rate, the number of targets is increased to increase the speed, but this is also a factor that increases the size of the apparatus.
[0009]
Attempts have also been made to produce a transparent conductive layer by a coating method. In the conventional coating method, a conductive paint in which conductive fine particles are dispersed in a binder solution is applied on a substrate, dried and cured, and a conductive layer is formed. The coating method has an advantage that a conductive layer having a large area can be easily formed, the apparatus is simple, the productivity is high, and the conductive layer can be manufactured at a lower cost than the sputtering method. In the coating method, when conductive fine particles come into contact with each other, an electric path is formed and conductivity is expressed. However, the conductive layer produced by the conventional coating method has a drawback that contact is insufficient, and the resulting conductive layer has a high electric resistance value (inferior in conductivity), and its application is limited.
[0010]
As a method for producing a transparent conductive layer by a conventional coating method, for example, in JP-A-9-109259, a coating composed of conductive powder and a binder resin is applied on a transfer plastic film and dried to form a conductive layer. First step, pressurizing the surface of the conductive layer to a smooth surface (5 to 100 kg / cm²), A second process of heating (70 to 180 ° C.), and a third process of laminating this conductive layer on a plastic film or sheet and thermocompression bonding is disclosed.
In this method, a large amount of binder resin is used (in the case of inorganic conductive powder, 100 to 500 parts by weight of conductive powder with respect to 100 parts by weight of binder, and in the case of organic conductive powder, binder 100 is used. Therefore, a transparent conductive layer having a low electric resistance value cannot be obtained.
[0011]
For example, Japanese Patent Application Laid-Open No. 8-199096 discloses a coating for forming a conductive layer which is made of tin-doped indium oxide (ITO) powder, a solvent, a coupling agent, a metal organic acid salt or an inorganic acid salt and does not contain a binder. The method of apply | coating to a board and baking at the temperature of 300 degreeC or more is disclosed. In this method, since no binder is used, the electric resistance value of the conductive layer is lowered. However, since it is necessary to perform a baking process at a temperature of 300 ° C. or higher, it is difficult to form a conductive layer on a support such as a resin film. That is, the resin film melts, carbonizes, or burns at a high temperature. Depending on the type of resin film, for example, a polyethylene terephthalate (PET) film may have a limit of 130 ° C.
[0012]
In the coating method, when the support is flexible like a film, a functional layer having a large area can be easily formed. However, in the case where the support is inferior in flexibility such as a plate material, the application is difficult compared to the case of the flexible support, and in particular, it is difficult to control the film thickness uniformly.
That is, in the case of a flexible film, the coater portion can be installed and the film can be moved and applied, and the film thickness can be easily controlled. On the other hand, in the case of a plate material with poor flexibility, it is possible to apply it by moving the plate material if it is a small area, but if the plate material is large, if the plate material is moved, the accuracy of the film thickness may be increased due to shaking or the like. It tends to get worse. There is also a method of moving the coater, but if the flatness of the plate material is poor, the accuracy of the film thickness is deteriorated.
[0013]
In order to form a functional layer on a support or object having poor flexibility, a method of transferring a functional layer formed on a flexible film onto a support or object having poor flexibility is considered. It is done.
[0014]
For example, in JP-A-60-231396, JP-A-60-233895, and JP-A-2-106097, a conductive layer is formed on a flexible support, and the conductive layer can be removed from the support. Transferring to a substrate with poor flexibility is disclosed. However, according to these publications, the conductive layer is formed on the flexible support by a sputtering method or a vapor deposition method. The sputtering method has the above-described problems, and the vapor deposition method has the same problems.
[0015]
On the other hand, it may be required to provide a functional layer on a support or an object, and to apply non-glare treatment (also called anti-glare treatment) to the surface. For example, it is a case of various displays represented by a cathode ray tube (CRT). On the front surface of the cathode ray tube, it is necessary to form a conductive layer in order to obtain antistatic and electromagnetic wave shielding, and it is desired that a non-glare layer is formed on the conductive layer in order to reduce reflection of external light. Further, in the PDP (plasma display panel), there is a demand for a near-infrared shielding, a color correction layer, and the like in addition to a demand for electromagnetic shielding, and a non-glare layer is also desired.
[0016]
Conventionally, non-glare treatment includes, for example, a method in which silica particles are dispersed in a binder and applied to the glass surface to be treated, a method in which abrasive grains are sprayed on the glass surface to be treated, and a glass surface to be treated is etched using fluorine. (For example, Japanese Patent Laid-Open No. 50-96128, Japanese Patent Laid-Open No. 55-12107, Japanese Patent Laid-Open No. 59-116601). These methods increase the number of manufacturing steps.
[0017]
Japanese Patent Application Laid-Open No. 8-187997 discloses that a non-glare treatment is performed on the display case surface using a transfer sheet. However, there is no description of providing the functional layer at the same time.
[0018]
[Problems to be solved by the invention]
From such a background, it is easy to form a functional layer having a large area on a flexible support, and the advantages of the coating method that the apparatus is simple, the productivity is high, and the functional layer can be manufactured at a low cost. Development of a method capable of obtaining a functional layer capable of expressing various functions while being utilized, for example, a transparent conductive layer having a low electric resistance value, is desired.
[0019]
Accordingly, an object of the present invention is to provide a functional layer capable of expressing various functions by a coating method, for example, a functional film for transfer having a transparent conductive layer having a low electrical resistance value, an object provided with the functional layer, and functionality. It is to provide a method for producing an object provided with a layer. In particular, the object of the present invention is to provide a functional film for transfer for imparting a functional layer having a uniform thickness to an object having poor flexibility such as a plate material, and to a flexibility provided with a functional layer having a uniform thickness. To provide scarce objects.
[0020]
An object of the present invention is to provide a functional layer capable of exhibiting various functions by a coating method, for example, a functional film for transfer capable of providing a transparent conductive layer having a low electric resistance value to a target object and performing non-glare treatment, and the function thereof The object is to provide a non-glare-treated object provided with a conductive layer and a method for producing the same. In particular, an object of the present invention is to provide a functional film for transfer for imparting a functional layer having a uniform thickness to a poorly flexible object such as a plate material and performing a non-glare treatment, and a functional layer having a uniform thickness. The object is to provide a non-glare-treated object having low flexibility.
[0021]
Another object of the present invention is to provide an adhesive composition for transferring and adhering a functional layer formed on a flexible support so as to be peelable onto a target object.
[0022]
Furthermore, the objective of this invention is providing the functional film for transfer which has a functional layer which consists of a compression layer of functional fine particles on the support body, and the adhesive bond layer formed from the said adhesive composition. .
[0023]
[Means for Solving the Problems]
Conventionally, in a coating method, a functional layer cannot be formed unless a large amount of binder resin is used, or if a binder resin is not used, a functional layer can be obtained unless the functional substance is sintered at a high temperature. It was considered impossible.
As for the conductive layer, the conductive layer cannot be formed unless a large amount of the binder resin is used, or if the binder resin is not used, the conductive layer cannot be obtained unless the conductive material is sintered at a high temperature. It was thought.
[0024]
However, as a result of intensive studies, the inventor has surprisingly been able to express various functions without compression using a large amount of binder resin and without firing at a high temperature and having mechanical strength by compression. We found that a functional layer was obtained. The present inventor has found that a transparent conductive layer having a low resistance value can be obtained when a conductive material is used.
[0025]
Furthermore, the present inventors have found that a functional film for transfer can be obtained by providing a functional layer on a support in a state where it can be peeled off from the support, and have reached the present invention.
[0026]
Furthermore, the present inventors have found that a functional film for transfer can be obtained by providing a functional layer on a non-glare-treated support in a state where it can be peeled off from the support, and have reached the present invention.
[0027]
  The present invention is a functional film having at least a functional layer that can be peeled from the support on the support,
  The functional layer includes a conductive layer, an ultraviolet shielding layer, an infrared shielding layer, a magnetic layer, a ferromagnetic layer, a dielectric layer, a ferroelectric layer, an electrochromic layer, an electroluminescence layer, an insulating layer, a light absorption layer, and a light selection layer. Absorption layer, reflection layer, antireflectionLayer, andSelected from the group consisting of photocatalytic layers,
  The functional layer is a functional fine particle-containing layer formed by applying and drying a liquid in which functional fine particles constituting the layer are dispersed on a support, and 44 N / mm.²It is a compressed layer of functional fine particles obtained by compressing with the above compressive force.The
  The liquid in which the functional fine particles are dispersed is
  It does not contain resin, or
  Expressed by the volume before dispersion, when the volume of the functional fine particles is 100, the resin contains a volume of less than 25.It is a functional film for transfer. The support has flexibility.
[0028]
In the present invention, “peelable” includes the case shown in FIG.
FIG. 1 (a) shows a form of peeling used in a normal sense, in which the layers A and B that are in contact with each other are completely peeled off from the interface.
FIG. 1B and FIG. 1C show a form of peeling in which the layer A and the layer B in contact with each other are peeled off from the interface, but a part of one layer A remains on the other layer B. When viewed microscopically as described above, even if it cannot be said that the film is completely peeled as shown in FIG. 1 (a), it can be peeled if each layer after peeling substantially forms a layer. In the case of the present invention, the functional fine particle compressed layer includes the case corresponding to the layer A in FIGS. 1 (b) and 1 (c).
[0029]
In the present invention, the “functional layer that can be peeled from the support” means that the support and the functional layer are peelable from each other. When the functional film for transfer of the present invention is actually used, the support is often peeled off from the functional layer attached on the target object.
[0030]
The functional film for transfer of the present invention includes two forms depending on whether the functional layer surface is exposed or not exposed when the functional layer is transferred to the object to be transferred.
[0031]
First, the first mode in which the functional layer surface is not exposed is described below:
In the present invention, a layer that can be peeled from the support is formed on the support, a compressed layer of the functional fine particles is formed on the peelable layer, and the peelable layer is made of the functional fine particles. It is the said functional film which can be peeled from the said support body with a compression layer. When the functional layer is transferred to the transfer target object using the functional film of the first form, the functional layer is transferred to the surface of the target object, and the peelable layer exists on the functional layer.
[0032]
This invention is the said functional film in which the said peelable layer contains the resin layer which has resin as a main component. The resin layer is peelable from the support together with the compressed layer of functional fine particles.
The present invention is the functional film, wherein the peelable layer includes a hard coat layer formed on the support and the resin layer formed on the hard coat layer. The hard coat layer can be peeled from the support together with the resin layer and the compressed layer of functional fine particles.
[0033]
Next, the second mode in which the functional layer surface is exposed will be described below:
In the present invention, an underlayer is formed on the support, the functional fine particle compression layer is formed on the underlayer, and the functional fine particle compression layer is peelable from the underlayer. It is a functional film.
[0034]
The underlayer is a layer that is not substantially peeled from the support during transfer. In other words, in the present invention, a layer that is not peeled off from the support is formed on the support, a compressed layer of the functional fine particles is formed on the non-peeled layer, and the compressed layer of the functional fine particles is The functional film is peelable from the support and the non-peeled layer.
[0035]
When the functional layer is transferred to the transfer target object using the functional film of the second form, the functional layer is transferred to the surface of the target object, and the functional layer surface is exposed.
The present invention provides the functional film, wherein the base layer, that is, the layer that is not peeled off, is a resin layer containing a resin as a main component.
[0036]
The functional film for transfer of the present invention includes a third form in which, when the functional layer is transferred to the transfer target object, the functional layer can be applied to the target object and non-glare treatment can be performed.
[0037]
The present invention is a functional film for transfer having at least a functional layer that can be peeled off from the support on the support, the surface of the support on the side of the functional layer being non-glare treated, and the function The functional layer is a functional film for transfer which is a compressed layer of functional fine particles. The support has flexibility.
[0038]
In the present invention, a layer that can be peeled from the support is formed on the support, a compressed layer of the functional fine particles is formed on the peelable layer, and the peelable layer is made of the functional fine particles. It is the said functional film for transfer which can be peeled from the said support body with a compression layer.
[0039]
The present invention provides the functional film for transfer, wherein the peelable layer includes a resin layer containing a resin as a main component. The resin layer is peelable from the support together with the compressed layer of functional fine particles.
The present invention provides the functional film for transfer, wherein the peelable layer includes a hard coat layer formed on the support and the resin layer formed on the hard coat layer. The hard coat layer can be peeled from the support together with the resin layer and the compressed layer of functional fine particles.
[0040]
In the functional films of the first, second, and third embodiments, it is also preferable that an adhesive layer is formed on the compressed layer of the functional fine particles. In the functional film, when the adhesive layer is not formed, the adhesive layer may be provided in advance on the object to be transferred.
[0041]
  In the functional film, the compressed layer of the functional fine particles is a support or a resin layer (a peelable layer in the first form, a base layer in the second form, that is, a non-peeled layer, a first layer) 3) a functional fine particle-containing layer formed by coating and drying44 N / mm ² With the above compression forceObtained by compressingThe
[0042]
  In producing the functional film, the dispersion of functional fine particles may contain a small amount of resin, but it is particularly preferable that no resin is contained. When the dispersion of functional fine particles contains a resin, the content of the resin is expressed as a volume, and the volume of the functional fine particles is less than 25 when the volume of the functional fine particles is 100.The
[0043]
In the functional film, when conductive fine particles are used as the functional fine particles, a functional film having a conductive layer (that is, a transfer conductive film) is obtained. In the functional film, it is also preferable that the compressed layer of the functional fine particles is a transparent conductive layer.
[0044]
The present invention is an object provided with a functional layer of the functional film. When the second form functional film is used, an object in which the functional layer surface is directly exposed can be obtained. In the present invention, the functional layer may be patterned.
Furthermore, the present invention provides a functional layer of the functional film from a support through an adhesive layer provided on a target object to which the functional layer adhesive layer and / or functional layer is to be applied. A method for producing an object provided with a functional layer, wherein the object is transferred onto the target object.
[0045]
The present invention is an object that is provided with a peelable layer including a functional layer of the functional film for transfer and is non-glare treated.
Further, in the present invention, the peelable layer including the functional layer of the functional film for transfer is placed on the target object to which the functional layer is to be applied from the support so that the release surface from the support is on the outside. A method for producing a non-glare-treated object provided with a functional layer. In the transfer, an adhesive layer of the functional film and / or an adhesive layer provided on the target object may be used.
[0046]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described with reference to the drawings. The layer structural example of the functional film of the 1st form of this invention and a 2nd form is shown in FIGS.
FIG. 2 is a cross-sectional view showing a layer configuration example of a functional film in which a functional layer (4) is formed on a support (1). In this case, the surface of the support (1) on the side of the functional layer (4) is subjected to a peeling treatment.
[0047]
FIG. 3 is a cross-sectional view showing an example of a layer structure of a functional film in which a resin layer (3) and a functional layer (4) are formed in this order on a support (1). The resin layer (3) is a peelable layer in the first form and a base layer in the second form, that is, a layer that is not peeled off. In the case of the first embodiment, the surface of the support (1) on the resin layer (3) side is peeled off, and peeled between the support (1) and the resin layer (3) during transfer. In the case of the second form, the adhesiveness between the support (1) and the resin layer (3) is high, and it is peeled between the resin layer (3) and the functional layer (4) during transfer.
[0048]
FIG. 4 is a cross-sectional view showing a layer configuration example of a functional film in which a resin layer (3), a functional layer (4), and an adhesive layer (5) are formed in this order on a support (1). . That is, an adhesive layer (5) is further formed on the functional layer (4) in FIG. In the case of the first form, peeling occurs between the support (1) and the resin layer (3) during transfer. In the case of the second form, peeling occurs between the resin layer (3) and the functional layer (4) during transfer.
[0049]
FIG. 5 is a cross-sectional view showing an example of a layer structure of a first form functional film in which a hard coat layer (2), a resin layer (3) and a functional layer (4) are formed in this order on a support (1). FIG. In this case, the surface of the support (1) on the hard coat layer (2) side may or may not be subjected to a peeling treatment. During transfer, peeling occurs between the support (1) and the hard coat layer (2).
[0050]
FIG. 6 shows a first form functional film in which a hard coat layer (2), a resin layer (3), a functional layer (4) and an adhesive layer (5) are formed in this order on a support (1). It is sectional drawing which shows the example of a layer structure of this. That is, an adhesive layer (5) is further formed on the functional layer (4) in FIG. In this case, the surface of the support (1) on the hard coat layer (2) side may or may not be subjected to a peeling treatment. During transfer, peeling occurs between the support (1) and the hard coat layer (2).
[0051]
Examples of the layer structure of the functional film according to the third embodiment of the present invention are shown in FIGS.
FIG. 7 is a cross-sectional view showing a layer configuration example of a functional film for transfer in which a resin layer (13) and a functional layer (14) are formed in this order on a non-glare-treated surface (11n) of a support (11). It is. In this case, the non-glare treated surface (11n) of the support (11) is subjected to a peeling treatment.
[0052]
FIG. 8 shows a functional film for transfer in which a hard coat layer (12), a resin layer (13) and a functional layer (14) are formed in this order on the non-glare-treated surface (11n) of the support (11). It is sectional drawing which shows the layer structural example. In this case, the non-glare treated surface (11n) of the support (11) may or may not be treated.
[0053]
FIG. 9 shows that a hard coat layer (12), a resin layer (13), a functional layer (14) and an adhesive layer (15) are formed in this order on the non-glare treated surface (1n) of the support (11). It is sectional drawing which shows the layer structural example of the functional film for transfer. In this case, the non-glare treated surface (11n) of the support (11) may or may not be treated.
[0054]
  In the present invention, the functional layers (4) and (14) are a conductive layer, an ultraviolet shielding layer, an infrared shielding layer, a magnetic layer, a ferromagnetic layer, a dielectric layer, a ferroelectric layer, an electrochromic layer, an electroluminescence layer, Insulating layer, light absorption layer, light selective absorption layer, reflection layer, antireflectionLayer, andAnd a photocatalytic layer. Therefore, in the present invention, functional fine particles that should constitute the target layer are used. The functional fine particles are not particularly limited, and mainly inorganic fine particles having a cohesive force are used. In any functional film production, a functional coating film having sufficient mechanical strength can be obtained by applying the method of the present invention, and a binder in a conventional coating method using a large amount of binder resin. The harmful effects caused by the resin can be eliminated. As a result, the intended function is further improved.
[0055]
For example, in the production of a transparent conductive layer, tin oxide, indium oxide, zinc oxide, cadmium oxide, antimony-doped tin oxide (ATO), fluorine-doped tin oxide (FTO), tin-doped indium oxide (ITO), aluminum-doped zinc oxide Conductive inorganic fine particles such as (AZO) are used. ITO is preferable in that it provides better conductivity. Or what coated inorganic material, such as ATO and ITO, on the surface of fine particles which have transparency, such as barium sulfate, can also be used. The particle diameter of these fine particles varies depending on the degree of scattering required depending on the application of the conductive film, and cannot be generally described depending on the shape of the particles, but is generally 10 μm or less, preferably 1.0 μm or less, 5 nm to 100 nm is more preferable.
[0056]
Alternatively, organic conductive fine particles may be used. Examples of the organic conductive fine particles include those in which a metal material is coated on the surface of resin fine particles.
[0057]
By applying this production method, excellent conductivity can be obtained. In the present invention, the transparent means that visible light is transmitted. Regarding the degree of light scattering, the required level varies depending on the use of the conductive layer. In the present invention, those having scattering, which is generally referred to as translucent, are also included.
[0058]
In the production of a ferromagnetic layer, γ-Fe₂O_Three, Fe_ThreeO_FourMainly composed of iron oxide magnetic powders such as Co-FeOx and Ba ferrite and ferromagnetic metal elements such as α-Fe, Fe-Co, Fe-Ni, Fe-Co-Ni, Co, and Co-Ni Ferromagnetic alloy powder or the like is used. By applying this production method, the saturation magnetic flux density of the magnetic coating film is improved.
[0059]
In the production of dielectric layers and ferroelectric layers, magnesium titanate, barium titanate, strontium titanate, lead titanate, lead zirconate titanate (PZT), lead zirconate, lanthanum added Dielectric or ferroelectric fine particles such as lead zirconate titanate (PLZT), magnesium silicate, and lead-containing perovskite compounds are used. Application of this manufacturing method can improve dielectric properties or ferroelectric properties.
[0060]
In the production of metal oxide layers that exhibit various functions, iron oxide (Fe₂O_Three), Silicon oxide (SiO₂), Aluminum oxide (Al₂O_Three), Titanium dioxide (TiO₂), Titanium oxide (TiO), zinc oxide (ZnO), zirconium oxide (ZrO)₂), Tungsten oxide (WO_Three) And other metal oxide fine particles are used. By applying this manufacturing method, the filling degree of the metal oxide in the film is increased, so that each function is improved. For example, SiO on which a catalyst is supported₂, Al₂O_ThreeWhen is used, a porous catalyst layer having practical strength can be obtained. TiO₂When is used, the photocatalytic function can be improved. In addition, WO_ThreeWhen is used, an improvement in the coloring effect in the electrochromic display element can be obtained.
[0061]
In the production of the electroluminescence layer, zinc sulfide (ZnS) fine particles are used. By applying this production method, an inexpensive electroluminescence layer can be produced by a coating method.
[0062]
In the present invention, a liquid in which functional fine particles selected from the above-mentioned various functional fine particles are dispersed is used as a functional coating depending on the purpose. This functional paint is applied and dried on a support or a resin layer mainly composed of a resin provided on the support to form a functional fine particle-containing layer. Thereafter, the functional fine particle-containing layer is compressed to form a compressed layer of functional fine particles to obtain a functional layer.
[0063]
The liquid in which functional fine particles such as conductive fine particles are dispersed is not particularly limited, and various known liquids can be used. For example, as liquid, saturated hydrocarbons such as hexane, aromatic hydrocarbons such as toluene and xylene, alcohols such as methanol, ethanol, propanol and butanol, acetone, methyl ethyl ketone (MEK), methyl isobutyl ketone, diisobutyl ketone, etc. Ketones, esters such as ethyl acetate and butyl acetate, ethers such as tetrahydrofuran, dioxane and diethyl ether, amides such as N, N-dimethylformamide, N-methylpyrrolidone (NMP) and N, N-dimethylacetamide And halogenated hydrocarbons such as ethylene chloride and chlorobenzene. Among these, polar liquids are preferable, and those having an affinity for water, such as alcohols such as methanol and ethanol, and amides such as NMP, have good dispersibility without using a dispersant. It is preferable. These liquids can be used singly or as a mixture of two or more. Moreover, a dispersing agent can also be used according to the kind of liquid.
[0064]
Water can also be used as the liquid. When water is used, the resin layer surface needs to be hydrophilic. Since the resin film and the resin layer are usually hydrophobic, water is easily repelled, and it is difficult to obtain a uniform film. In such a case, it is necessary to mix alcohol with water or to make the surface of the resin layer hydrophilic.
[0065]
The amount of the liquid to be used is not particularly limited, and the fine particle dispersion may have a viscosity suitable for coating. For example, the amount of the liquid is about 100 to 100,000 parts by weight with respect to 100 parts by weight of the fine particles. It is preferable to select appropriately according to the kind of the fine particles and the liquid.
[0066]
The dispersion of the fine particles in the liquid may be performed by a known dispersion method. For example, it is dispersed by a sand grinder mill method. In dispersing, it is also preferable to use media such as zirconia beads in order to loosen the aggregation of the fine particles. Also, care should be taken not to mix impurities such as dust during dispersion.
[0067]
The fine particle dispersion preferably contains no resin. That is, it is preferable that the resin amount = 0. In the conductive layer, if no resin is used, the contact between the conductive fine particles is not hindered by the resin. Therefore, the conductivity between the conductive fine particles is ensured, and the electric resistance value of the obtained conductive layer is low. The resin can be contained in an amount that does not impair the conductivity, but the amount is less than the amount used as a binder resin in the prior art. For example, the upper limit of the content of the resin in the dispersion is represented by the volume before dispersion, and the volume of the conductive fine particles is 100, and the volume is less than 25. In the prior art, since strong compression is not performed, a large amount of binder must be used to obtain the mechanical strength of the coating film. When an amount of resin that plays a role as a binder is used, contact between the conductive fine particles is inhibited by the binder, electron transfer between the fine particles is inhibited, and conductivity is lowered.
[0068]
On the other hand, the resin has an effect of improving the haze of the conductive layer. However, from the viewpoint of conductivity, the resin is preferably used in a volume range of less than 25 when the volume of the conductive fine particles is represented as 100 and expressed as a volume before dispersion, and a volume of less than 20 It is more preferable to use within the range. Moreover, although the effect of improving haze is reduced, it is most preferable not to use a resin from the viewpoint of conductivity.
[0069]
WO_ThreeFine particles and TiO₂Even in a functional layer using fine particles or the like, if the resin is not used, the contact between the fine particles is not hindered by the resin, so that each function can be improved. It is possible to include a resin as long as the contact between the fine particles is not hindered and does not impair each function, but the amount is, for example, about 80 or less when the volume of each fine particle is 100. Volume.
[0070]
Al₂O_ThreeIn a catalyst layer using fine particles or the like, the surface of fine particles having a catalytic function is not covered by the resin unless a resin is used. For this reason, the function as a catalyst is improved. In the catalyst layer, the more voids inside the membrane, the more active points as a catalyst. Therefore, it is preferable not to use a resin as much as possible from this viewpoint.
[0071]
Thus, it is preferable not to use a resin in the functional layer at the time of compression (that is, in the fine particle dispersion), and even if it is used, a small amount is preferable. The amount of the resin to be used may be appropriately determined because it can be changed to some extent according to the purpose of the functional layer.
[0072]
Various additives may be blended in the fine particle dispersion within a range satisfying performance required for each function such as conductivity and catalytic action. For example, additives such as ultraviolet absorbers, surfactants, and dispersants.
[0073]
As the supports (1) and (11), a flexible resin film that does not crack even when the compression force in the compression step is increased is suitable. The resin film is lightweight and easy to handle. In the present invention, a resin film can be used as a support since there is no pressurization step at high temperature and no firing step.
Examples of the resin film include polyester films such as polyethylene terephthalate (PET), polyolefin films such as polyethylene and polypropylene, polycarbonate films, acrylic films, norbornene films (manufactured by JSR Corporation, Arton, etc.), and the like.
In addition to the resin film, cloth, paper, or the like can be used as the support.
[0074]
In the third form functional film, the surface of the support (11) on the side where the functional layer is to be formed needs to have irregularities, that is, non-glare treatment. When the support surface has unevenness, the contact surface of the peelable layer formed on the support with the support has unevenness according to the unevenness of the support surface. Therefore, when the peelable layer including the functional layer is transferred from the support to the target object so that the release surface from the support is on the outside, a target object having a non-glare-treated surface is obtained.
[0075]
In the case of the functional film having the layer structure of FIG. 2, the formed functional layer (4) is formed on the surface of the support (1) on the side where the functional layer (4) is to be formed. In order to obtain a state in which the film can be peeled off, a peeling treatment is preferably performed. For example, a silicone release agent or the like may be applied to the support surface.
[0076]
The surface treatment of the supports (1) and (11), the hard coat layers (2) and (12), and the resin layers (3) and (13) in the functional films of the first and third embodiments will be described.
[0077]
In the case of the first form functional film having the layer structure shown in FIGS. 3 and 4, the resin layer (3) is peeled between the support (1) and the resin layer (3) during transfer. The surface of the support (1) on the side of the resin layer (3) may be subjected to a peeling treatment due to the compatibility between the resin material constituting the support and the support (1).
[0078]
Further, as shown in FIGS. 5 and 6, it is also preferable to form a hard coat layer (2) having low adhesion with the support on the surface of the support (1). A hard coat layer (for example, having a pencil hardness greater than 4H, preferably harder than 5H) formed using a silicone resin has low adhesion to a resin film such as PET, and the support (1) and the hard coat layer (2) can be easily peeled off. In this case, the surface of the support (1) may be treated with a release agent, but it is not necessary to treat with the release agent.
[0079]
In the case of the third type functional film having the layer structure of FIGS. 8 and 9, the functional layer (14) formed on the surface of the support (11) on the side on which the functional layer (14) is to be formed. ) Is peelable from the support (11), it is preferable to perform a peeling treatment depending on the compatibility between the material constituting the hard coat layer (12) and the support (11). For example, a silicone release agent or the like may be applied to the support surface. A film treated with a release agent is generally referred to as a release film. For example, it is also preferable to form a hard coat layer having low adhesion to the support on the support surface. A hard coat layer (for example, harder than pencil hardness 4H or more) formed using a silicone resin has low adhesion to a resin film such as PET and can be easily peeled off. In this case, it is not necessary to treat the support surface with a release agent.
[0080]
The hard coat layers (2) and (12) can be formed by applying a solution obtained by dissolving a hard coat agent in a solvent as required, drying the composition on a support, and then curing.
The hard coat agent is not particularly limited, and various known hard coat agents can be used. For example, silicone-based, acrylic-based, melamine-based thermosetting hard coat agents can be used. Among these, the silicone-based hard coat agent is excellent in that high hardness can be obtained.
[0081]
Further, an ultraviolet curable hard coat agent such as an unsaturated polyester resin-based or acrylic-based radical polymerizable hard coat agent or an epoxy-based or vinyl ether-based cationic polymerizable hard coat agent may be used. The ultraviolet curable hard coat agent is preferable from the viewpoint of productivity such as curing reactivity. Among these, in view of curing reactivity and surface hardness, an acrylic radical polymerizable hard coating agent is desirable.
[0082]
The hard coat agent may be applied by a known method such as a roll coater such as a gravure cylinder, reverse, or Mayer bar, or a slit die coater.
After application, it is dried in an appropriate temperature range and then cured. In the case of a thermosetting hard coat agent, appropriate heat is applied. For example, in the case of a silicone type hard coat agent, it is cured by heating to about 60 to 120 ° C. for 1 minute to 48 hours. In the case of an ultraviolet curable hard coat agent, it is cured by irradiating with ultraviolet rays. For ultraviolet irradiation, a xenon lamp, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a metal halide lamp, a carbon arc lamp, a tungsten lamp, etc.²It is good to irradiate to some extent. The thickness of the hard coat layer is, for example, about 0.5 to 20 μm, preferably about 2 to 5 μm.
[0083]
The hard coat layers (2) and (12) may contain an ultraviolet absorber. As the ultraviolet absorber, various known ultraviolet absorbers may be used. For example, salicylic acid ultraviolet absorbers, benzophenone ultraviolet absorbers, benzotriazole ultraviolet absorbers, cyanoacrylate ultraviolet absorbers and the like can be mentioned. The hard coat layer may further contain various known additives such as a light stabilizer such as a hindered amine light stabilizer, an antioxidant, an antistatic agent, and a flame retardant, if necessary. What is necessary is just to add and apply | coat an ultraviolet absorber and various additives in a hard-coat agent.
[0084]
When the hard coat layer (2) (12) is formed on the surface of the support (1) (11), functional fine particles such as conductive fine particles are transferred to the hard coat layer (during the compression step after drying). 2) Since it is not embedded in (12), the adhesion between the fine particle layer (4) (14) and the hard coat layer (2) (12) is not good.
[0085]
Therefore, in the first and third embodiments of the present invention, resin layers (3) and (13) mainly composed of a soft resin are formed in advance on the hard coat layers (2) and (12), and the resin layer ( 3) (13) It is preferable to apply, dry and compress a liquid in which functional fine particles are dispersed. The resin layers (3) and (13) are required to be soft enough to form the functional fine particle compression layers (4) and (14) with good adhesion. Accordingly, the resin layer is preferably softer than, for example, pencil hardness 2H. The degree of softness required for the resin layer varies depending on the hardness of the hard coat layer used, the type and particle size of the functional fine particles, the compression pressure, and the like.
[0086]
A soft resin can be used for the resin layers (3) and (13) in the first and third embodiments. Examples of such resins include acrylic resins, urethane resins, vinyl chloride resins, and silicone resins. Therefore, a material having a relatively low hardness is used. The resin layer may contain fine particles such as silica for adjusting the hardness of the resin layer, and a filler for coloring and ultraviolet absorption, as long as the adhesion is not adversely affected. After compression, the soft resin layer may be cured with heat, ultraviolet light, or the like.
[0087]
Next, the resin layer (3) in the second form functional film will be described.
In the case of the second form functional film having the layer structure shown in FIGS. 3 and 4, the resin layer (3) is peeled off between the resin layer (3) and the functional layer (4) during transfer. ) Has a relatively high hardness, for example, a pencil hardness of 2H or more and 4H or less. Further, it is preferable that the adhesion between the support (1) and the resin layer (3) is high.
For the resin layer (3) in the second embodiment, a relatively hard resin can be used, and examples of such a resin include an acrylic resin, a urethane resin, a vinyl chloride resin, and a silicone resin. Use one that provides hardness. The resin layer can also contain fine particles such as silica for adjusting the hardness of the resin layer. After compression, the resin layer may be cured with heat, ultraviolet light, or the like.
[0088]
The resin of the resin layers (3) and (13) in the functional films of the first, second, and third embodiments is preferably one that does not dissolve in the liquid in which the functional fine particles are dispersed. In the conductive layer, when the resin layer is dissolved, a solution containing the resin comes around the conductive fine particles due to capillary action, and as a result, the electric resistance value of the obtained conductive layer increases. Also in the catalyst layer, the solution containing the resin comes around the fine particles having a catalytic function due to capillary action, and the catalytic function is lowered.
[0089]
The functional fine particle dispersion is applied onto the resin layer (3) (13) or the support (1) (11) and dried to form a functional fine particle-containing layer such as a conductive fine particle-containing layer.
The application of the fine particle dispersion is not particularly limited and can be performed by a known method. For example, it can be performed by a coating method such as a reverse roll method, a direct roll method, a blade method, a knife method, an extrusion nozzle method, a curtain method, a gravure roll method, a bar coat method, a dip method, a kiss coat method, or a squeeze method. It is also possible to deposit the dispersion on the support by spraying or spraying.
[0090]
The drying temperature depends on the type of liquid used for dispersion, but is preferably about 10 to 150 ° C. If it is less than 10 ° C, condensation of moisture in the air tends to occur, and if it exceeds 150 ° C, the resin film support is deformed. Also, care should be taken so that impurities do not adhere to the surface of the fine particles during drying.
[0091]
The thickness of the functional fine particle-containing layer such as the conductive fine particle-containing layer after coating and drying depends on the compression conditions in the next step and the use of each functional film such as the final conductive film. do it.
[0092]
Thus, when functional fine particles such as conductive fine particles are dispersed in a liquid, applied, and dried, a uniform film can be easily formed. When the fine particle dispersion is applied and dried, the fine particles form a film even if no binder is present in the dispersion. The reason for forming a film without the presence of a binder is not necessarily clear, but when the liquid is reduced after drying, fine particles gather together due to capillary force. Furthermore, the fact that it is a fine particle has a large specific surface area and a strong cohesive force, so it is thought that it may become a film. However, the strength of the film at this stage is weak. In addition, the conductive layer has a high resistance value and a large variation in resistance value.
[0093]
Next, the formed functional fine particle-containing layer such as the conductive fine particle-containing layer is compressed to obtain a compressed layer (4) of functional fine particles such as the conductive fine particles. By compressing, the strength of the film is improved. That is, by compressing, the contact points between functional fine particles such as conductive fine particles increase and the contact surface increases. For this reason, the coating film strength increases. Since the fine particles originally have a property of easily agglomerating, they become a strong film by being compressed.
[0094]
In the conductive layer, the coating strength increases and the electrical resistance decreases. In the catalyst layer, the coating film strength is increased, and the resin is not used or the amount of the resin is small, so that the catalyst layer becomes a porous layer. Therefore, a higher catalytic function can be obtained. Also in other functional layers, a high-strength film in which fine particles are connected to each other can be obtained, and since no resin is used or the amount of resin is small, the filling amount of fine particles per unit volume is increased. Therefore, higher functions can be obtained.
[0095]
  Compression is 44 N / mm²With the above compression forceYeah. 44N / mm²If the pressure is less than 1, the functional fine particle-containing layer such as the conductive fine particle-containing layer cannot be sufficiently compressed. For example, it is difficult to obtain a conductive layer having excellent conductivity. 135 N / mm²The above compressive force is more preferable, 180 N / mm²The compression force of is more preferable. The higher the compression force, the better the coating strength and the better the adhesion with the support. In the conductive layer, a layer having higher conductivity is obtained, the strength of the conductive layer is improved, and the adhesion between the conductive layer and the resin layer is strengthened. The higher the compression force, the higher the pressure resistance of the device, so generally 1000 N / mm²The compression force up to is appropriate.
[0096]
Moreover, it is preferable to perform compression at the temperature which the said support body does not deform | transform. For example, when the said support body is a resin film, it becomes the temperature range below the glass transition temperature (secondary transition temperature) of the said resin.
[0097]
The compression is not particularly limited and can be performed by a sheet press, a roll press, or the like, but is preferably performed using a roll press machine. The roll press is a method in which a film to be compressed is sandwiched between rolls and compressed, and the roll is rotated. A roll press is uniformly high pressure, and is more suitable for productivity than a sheet press.
[0098]
The roll temperature of the roll press machine is preferably room temperature (an environment in which humans can easily work) from the viewpoint of productivity. In the compressed atmosphere (hot press) in which the heated atmosphere or the roll is heated, there is a problem that the resin film extends when the compression pressure is increased. When the compression pressure is weakened so that the resin film of the support does not stretch under heating, the mechanical strength of the coating film decreases. In the conductive layer, the mechanical strength of the coating film decreases and the electrical resistance increases. It is also preferable to adjust the temperature so that the roll temperature does not rise due to heat generation when continuously compressed by a roll press.
[0099]
When there is a reason for wanting to minimize moisture adhesion on the surface of fine particles, a heated atmosphere may be used to reduce the relative humidity of the atmosphere, but the temperature range is within the range where the film does not easily stretch. It is. Generally, it is a temperature range below the glass transition temperature (secondary transition temperature). In consideration of fluctuations in humidity, the temperature may be a little higher than the required temperature.
[0100]
The glass transition temperature of the resin film is obtained by measuring dynamic viscoelasticity, and indicates a temperature at which the dynamic loss of main dispersion reaches a peak. For example, when looking at a PET film, its glass transition temperature is around 110 ° C.
[0101]
The roll of the roll press machine is preferably a metal roll because a strong pressure is applied. Also, if the roll surface is soft, fine particles may be transferred to the roll during compression, so that the roll surface is hard chrome, ceramic sprayed film, a film obtained by ion plating such as TiN, DLC (diamond-like carbon), etc. It is preferable to treat with a hard film.
[0102]
In this way, a compressed layer (4) (14) of functional fine particles such as conductive fine particles is formed. The thickness of the functional fine particle compressed layer such as conductive fine particles may be about 0.1 to 10 μm, although it depends on the application. Moreover, in order to obtain a thick compressed layer of about 10 μm, a series of operations of applying a dispersion of fine particles, drying, and compression may be repeated. Furthermore, in the present invention, it is of course possible to form each functional layer such as a conductive layer on both sides of the support. Each functional layer such as a transparent conductive layer thus obtained exhibits excellent functionality such as conductivity and catalytic action, and does not use a binder resin or a small amount of resin that does not function as a binder. Despite being prepared by using, it has a practically sufficient film strength. In the 1st form and the 3rd form, it is excellent also in adhesiveness with a soft resin layer (3) (13).
[0103]
In the functional films of the first, second and third embodiments of the present invention, the functional fine particle compressed layer (4) (14) may be composed of at least two compressed layers of different functional fine particles. Good.
[0104]
Depending on the purpose and application of the multilayer functional layer, a multilayer structure may be formed by combining a plurality of functional layers having different functions. By combining a plurality of functional layers, for example, multilayer functional layers for solar cells, electroluminescent elements, electrochromic elements and the like can be obtained.
[0105]
  Specifically, for solar cells, a transparent conductive layer, a transparent insulator layer, a chalcoa composed of a group I, a group III, a group IV in this order.IA multilayer structure including a light structure semiconductor layer and a metal electrode is exemplified.
  For the distributed direct current operation electroluminescent element, a multilayer structure of a transparent conductive layer, an EL light emitting layer, and a back electrode is exemplified in order.
  Examples of the transmissive electrochromic device include a multilayer structure of a transparent conductive layer, a first color developing layer, a dielectric layer, a second color developing layer, and a transparent conductive layer in this order.
  In addition to these, various multilayer structures according to various applications are conceivable.
[0106]
The multilayer structure can be obtained by repeatedly performing a series of operations of applying a dispersion of the corresponding functional fine particles, drying, and compressing. All of the layers constituting the multilayer functional layer are not necessarily compressed layers. For example, in the case of a solar cell, the transparent conductive layer, the transparent insulator layer, and the semiconductor layer may be formed by compression, and the metal electrode may be formed by vapor deposition.
[0107]
In the functional films of the first, second and third embodiments of the present invention, it is also preferable to form an adhesive layer (5) (15) on the functional layer (4) (14). By forming the adhesive layer (5) (15), the functional layer (4) (14) is formed on the target object to which the functional layer (4) (14) is to be applied via the adhesive layer. ) Becomes easy to transfer. In the functional film of the present invention, when the adhesive layer is not formed, an adhesive layer may be provided on the object to be transferred in advance. Of course, it is also preferable to form the adhesive layers (5) and (15) on the functional film of the present invention, and further provide an adhesive layer on the object to be transferred.
[0108]
The functional layers (4) and (14) of the functional film and the transfer target object are provided in advance on the adhesive layers (5) and (15) of the functional film of the present invention and on the transfer target object. Any known adhesive can be used without particular limitation as long as the adhesive has an affinity for both of the surfaces and can strongly bond the both. Examples include acrylic adhesives, epoxy adhesives, isocyanate adhesives, silicone adhesives, and the like. The adhesive may be curable by ultraviolet rays or heat after being transferred to the object to be transferred. A hot melt type may be used.
[0109]
As the adhesive used for the adhesive layers (5) and (15) of the functional film of the present invention, a tacky adhesive layer can be obtained simply by applying an adhesive solution and drying, and the adhesive layer is applied onto an object to be transferred. Adhesives that can provide a very hard cured layer by UV curing of the adhesive layer after application are preferred. Softening or deterioration of the adhesive layer after being stuck on the transfer target object is not preferable.
[0110]
Therefore, the present inventor also examined an adhesive satisfying such properties, and found that the following adhesive composition was suitable as an adhesive used for the adhesive layer of the functional film of the present invention.
1. An adhesive composition comprising a polymer resin component (P) having a glass transition temperature Tg of 30 ° C. or higher and a curable low molecular component (M) at a weight ratio P / M = 8/2 to 2/8.
2. The adhesive composition according to 1 above, wherein the polymer resin component (P) is solid at room temperature and the curable low molecular component (M) is liquid at room temperature.
3. 3. The adhesive composition according to 1 or 2, wherein the polymer resin component (P) is an acrylic resin and the curable low molecular component (M) is an acrylic monomer.
4). The adhesive composition according to any one of 1 to 3, further comprising a photopolymerization initiator.
5. The adhesive composition according to any one of 1 to 4, which is cured by light irradiation.
[0111]
The polymer resin component is solid at room temperature, and the curable low-molecular component is liquid at room temperature, so it is easy to form a pressure-sensitive adhesive layer that can be cured by giving stimulus while having adhesiveness. it can. What is necessary is just to have moderate adhesiveness.
[0112]
Examples of the polymer resin component include acrylic resin 103B (manufactured by Taisei Kako Co., Ltd.). Examples of the curable low molecular component include tri- or more functional acrylic monomers such as KAYARAD GPO-303, KAYARAD TMPTA, and KAYARAD THE-330 (all manufactured by Nippon Kayaku Co., Ltd.). Various photopolymerization initiators can be used, and examples thereof include KAYACURE DETX-S (manufactured by Nippon Kayaku Co., Ltd.).
[0113]
When the adhesive composition is cured by light irradiation, the productivity when the functional film is adhered to the target object is increased.
The adhesive composition may contain additives such as an ultraviolet absorber and an infrared absorber as necessary.
[0114]
When the adhesive layers (5) and (15) are provided on the functional film of the present invention, a release film may be provided on the adhesive layer to protect the adhesive layer surface until use.
[0115]
In addition, an adhesive layer is formed on a separate release-treated release support, and the release support on which the adhesive layer is formed and the functional film of the present invention are combined with the adhesive layer and the functional film. The functional layers (4) and (14) may be laminated so as to be in contact with each other and bonded (adhered), whereby the adhesive layers (5) and (15) may be provided on the functional film. In this case, simultaneously with the formation of the adhesive layers (5) and (15), a peeling support is applied on the adhesive layer, and the adhesive layer surface is protected until use.
[0116]
As an adhesive for bonding a functional film having a functional layer on a support onto a target object, or for transferring and bonding a functional layer formed on a support so as to be peelable onto the target object If a general adhesive or pressure-sensitive adhesive is used, the functional layer may be destroyed. That is, the functional layer formed on the support is thin, and is particularly fragile when the functional layer is mainly composed of an inorganic material. The adhesive can flow. For this reason, when a functional film or functional layer is adhered or transferred to an object using an adhesive, the adhesive layer flows and functions when the force is applied locally to the functional layer. The layer breaks.
[0117]
When a liquid adhesive is used and cured, the functional layer is not broken because the fluidity is lost by curing. However, if the fluidity is too high like a liquid, it is unsuitable for an adhesive layer formed on a functional film in consideration of the handleability of the film.
[0118]
Therefore, an adhesive layer having a tacky feeling can be obtained simply by applying an adhesive solution and drying, and an extremely hard cured layer can be obtained by UV-curing the adhesive layer after being applied on a target object. Developed. There is no softening or deterioration of the cured adhesive layer after being applied and cured on the object to be transferred.
[0119]
In the present invention, it is also preferable to heat-treat the functional fine particle compression layer after forming the functional fine particle compression layer and before forming the adhesive layer. By the heat treatment, the internal stress at the time of forming the compressed layer remaining in the resin layer is relieved, and the corrosion resistance of the functional film to various substances and various solvents is improved.
[0120]
What is necessary is just to select the conditions of heat processing suitably. The heat treatment temperature is preferably 50 ° C. or higher, more preferably 80 ° C. or higher, for relaxation of internal stress. The upper limit of the heat treatment temperature is usually 130 ° C., for example, when a resin film is used as the support. The heat treatment time is also usually in the range of 1 minute to 100 hours, preferably 10 minutes to 50 hours, more preferably 30 minutes to 25 hours. The atmosphere during the heat treatment may be any of vacuum, reduced pressure, air, nitrogen gas, and inert gas such as argon.
[0121]
The present invention also relates to an object provided with the functional layer (4) of the functional film of the first and second embodiments described above. 10 and 11 show examples of the layer structure of the object provided with the functional layer of the present invention.
[0122]
FIG. 10 is a cross-sectional view showing a layer configuration example in which the functional layer (4) is provided on the surface of the target object (6) via the adhesive layer (5). This adhesive layer (5) is derived from the adhesive layer (5) of the functional film for transfer and / or the adhesive layer previously formed on the target object. A resin layer (3) and a hard coat layer (2) are provided on the functional layer (4). That is, FIG. 10 shows an example in which the functional layer (4) is transferred using the first form functional film shown in FIG. 5 or FIG.
[0123]
FIG. 11 is a cross-sectional view showing a layer configuration example in which the functional layer (4) is provided on the surface of the target object (6) via the adhesive layer (5). This adhesive layer (5) is derived from the adhesive layer (5) of the functional film for transfer and / or the adhesive layer previously formed on the target object. That is, FIG. 11 shows an example in which the functional layer (4) is transferred using the functional film shown in FIG. 2 or the second form functional film shown in FIG. 3 or FIG.
[0124]
The target object (6) is not particularly limited and includes various objects. For example, an object or support having poor flexibility such as a plate material that is difficult to form a coating layer having a uniform thickness, or an object such as glass or ceramic that is difficult to directly form a compression layer is included. For example, the CRT surface is required to be subjected to treatments such as antistatic, electromagnetic wave shielding, and antireflection, and the CRT is a specific example of the target object in the present invention.
[0125]
In order to obtain an object provided with the functional layer of the present invention, the functional layer (4) of the functional film described above is transferred from the support (1) onto the target object (6). That is, through the functional film adhesive layer (if provided) and / or the adhesive layer on the target object so that the functional film is on the target object surface and the support (1) is on the outside, paste. Thereafter, the support (1) of the functional film is peeled off.
[0126]
FIG. 12 is a diagram for explaining peeling during transfer. 12A shows a state in which the functional film of the first or second form shown in FIG. 3 is attached to the surface of the object to be transferred (6). In the present invention, the terms “releasable” and “not peelable” are used to represent the behavior when transferred onto a target object as described below. Therefore, it does not mean absolute bonding strength.
[0127]
The relationship among the layers in the present invention will be described with reference to FIG. Regarding the adhesion between the resin layer (3) and the functional layer (4), some of the functional fine particles of the functional layer (4) in contact with the resin layer (3) are embedded in the resin layer (3) by compression. It is considered that the functional layer (4) is in close contact with the resin layer (3). Therefore, the higher the compression pressure, the higher the adhesion of both layers (3) (4), and the higher the pressure of the resin layer (3), the higher the adhesion of both layers (3) (4). . The adhesion force varies depending on the type, shape, particle size, etc. of the functional fine particles, and also varies depending on the presence and type of the resin contained in the functional fine particle layer during compression.
[0128]
In FIG. 12, the interface between the support (1) and the resin layer (3) (referred to as interface I), the interface between the resin layer (3) and the functional layer (4) (referred to as interface II), the functional layer. There is an interface (referred to as interface III) between (4) and the adhesive layer (5), and an interface (referred to as interface IV) between the adhesive layer (5) and the target object (6). In the present invention, the invention of the first embodiment can be achieved by making the adhesion at the interface I lower than the adhesion at any other interface. Moreover, the invention of the second embodiment is achieved by making the adhesion at the interface II lower than the adhesion at any other interface.
[0129]
In order to make the adhesion at the interface I lower than the adhesion at the other interface, the adhesion between the support (1) and the resin layer (3) should be lowered. Therefore, in order to peel off between the support (1) and the resin layer (3) at the time of transfer, the surface of the support (1) on the resin layer (3) side may be subjected to a peeling treatment. Moreover, what is necessary is just to improve the adhesiveness of another interface. In order to improve the adhesion between the resin layer (3) and the functional layer (4), a relatively soft resin layer may be used.
[0130]
In order to make the adhesion at the interface II lower than the adhesion at the other interface, the adhesion between the resin layer (3) and the functional layer (4) may be lowered. When the hardness of the resin layer (3) is relatively high, the adhesion between the compression layer and the resin layer becomes low. However, if the resin layer (3) is hard like a hard coat, the adhesion is too low. In general, the resin layer (3) preferably has a relatively high hardness, for example, a pencil hardness of about 2H to 4H. Moreover, what is necessary is just to improve the adhesiveness of another interface. In order to enhance the adhesion between the support (1) and the resin layer (3), the adhesion may be improved by subjecting the surface of the support (1) to easy adhesion (for example, corona treatment).
[0131]
When peeling the support (1), in the case of the functional film of the first form, peeling occurs between the support (1) and the soft resin layer (3) (arrow I in the figure). The adhesion between the functional layer (4) and the soft resin layer (3) is good, and no separation occurs between the functional layer (4) and the resin layer (3). Therefore, as shown in (b), the functional layer (4) is applied to the surface of the target object (6) via the adhesive layer (5), and the resin layer (3) is formed on the functional layer (4). Exists. As shown in FIG. 6, the functional film according to the first embodiment of the present invention has a hard coat layer (2), a resin layer (3), a functional layer (4), and an adhesive layer on a support (1). It is preferable to have (5) in this order.In this case, the adhesion between the support (1) and the hard coat layer (2) is low, and between the support (1) and the hard coat layer (2). Peeling occurs. Accordingly, as shown in FIG. 10, the functional layer (4) is provided on the surface of the target object (6) via the adhesive layer (5), and the resin layer (3) and the functional layer (4) are provided on the functional layer (4). A hard coat layer (2) is present.
[0132]
Thus, the object (6) provided with the functional layer (4) is obtained using the functional film of the first form. The hard coat layer (2) or the resin layer (3) of the functional film is exposed on the surface of the obtained object. Depending on the application, the exposed resin layer (3) may be removed to expose the functional layer (4). The hard coat layer (2) after the transfer also serves as a protective layer for the functional layer (4).
[0133]
When the support (1) is peeled off, in the case of the functional film of the second form, the adhesion between the functional layer (4) and the hard resin layer (3) is low, and the resin layer (3) and the functional film Peeling occurs between the layers (4) (arrow II in the figure). Therefore, as shown in (c), the functional layer (4) is applied to the surface of the target object (6) via the adhesive layer (5), and the surface of the functional layer (4) is exposed. Thus, the object (6) provided with the functional layer (4) is obtained using the functional film of the second form. The functional film of the second form is suitable when it is desired to provide a functional layer exposed on the object surface.
[0134]
By selecting the material and hardness of the resin layer (3) mainly, the functional film of the first form or the second form can be produced.
[0135]
When transferring the functional layer, an adhesive layer may be provided on the transfer target object in advance, or the transfer target object may be surface-treated in advance. For example, when the object to be transferred is glass, the surface may be surface-treated with a silane coupling agent or the like.
[0136]
In the functional film of the present invention, a resin layer is formed on the support, and a compressed layer of the functional fine particles is formed on the resin layer. The functional film according to claim 1, wherein the functional film according to claim 1, including a layer, is peelable from the support, and a part of the resin layer remains on the support after peeling. This functional film belongs to the first form.
[0137]
In the functional film of the present invention, a resin layer is formed on the support, and a compressed layer of the functional fine particles is formed on the resin layer. 2. The functional film according to claim 1, wherein the functional film according to claim 1 can be peeled from the support without including a resin layer, and a part of the compressed layer of the functional fine particles remains on the resin layer after peeling. . This functional film belongs to the second form.
[0138]
The present invention also relates to a non-glare-treated object provided with a peelable layer including the functional layer of the functional film for transfer of the third form described above. Examples of the layer structure of the object provided with the functional layer of the present invention are shown in FIGS.
[0139]
FIG. 13 is a cross-sectional view showing a layer configuration example in which a functional layer (14) is provided on the surface of a target object (16) via an adhesive layer (15) and a resin layer (13) having a non-glare surface (13n) is provided. It is. This adhesive layer (15) is derived from the adhesive layer (15) of the functional film for transfer and / or the adhesive layer previously formed on the target object.
FIG. 14 is a cross-sectional view showing an example of a layer structure in which a functional layer (14) is provided on the surface of an object (16) via an adhesive layer (15) and a hard coat layer (12) having a non-glare surface (12n) is provided. FIG. This adhesive layer (15) is derived from the adhesive layer (15) of the functional film for transfer and / or the adhesive layer previously formed on the target object.
[0140]
The target object (16) is not particularly limited, and includes various objects that require functional layer application and non-glare treatment. For example, an object or support having poor flexibility such as a plate material that is difficult to form a coating layer having a uniform thickness, or an object such as glass or ceramic that is difficult to directly form a compression layer is included. For example, the surface of the CRT is required to be treated such as antistatic, electromagnetic wave shielding, and antireflection, and the CRT and various displays are given as specific examples of the target object in the present invention.
[0141]
In order to obtain a nonglare-treated object provided with the functional layer of the present invention, a peelable layer including the functional layer (14) of the functional film described above is removed from the support (11) and the target object (16 ) Is transferred so that the peeled surface (non-glare-treated surface) from the support (11) is on the outside. That is, the functional film is attached to the surface of the target object (16) with an adhesive layer of the functional film and / or an adhesive layer provided in advance on the target object. Thereafter, the support (11) of the functional film is peeled off. In this way, an object having the functional layer (14) and non-glare treatment is obtained. The hard coat layer (12) after the transfer also serves as a protective layer for the functional layer.
[0142]
When transferring the functional layer, an adhesive layer may be provided on the transfer target object in advance, or the transfer target object may be surface-treated in advance. For example, when the object to be transferred is glass, the surface may be surface-treated with a silane coupling agent or the like.
[0143]
【Example】
EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.
[0144]
[Example 1: First embodiment]
As shown in FIG. 6, the transfer in the first form has a hard coat layer (2), a resin layer (3), a functional layer (4) and an adhesive layer (5) in this order on a support (1). A functional film was created.
[0145]
(Formation of hard coat layer)
A silicone hard coat liquid KP-854 (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied onto a 50 μm thick PET film (1), dried, cured at 90 ° C. for 2 hours, and a 2.5 μm thick silicone hard coat. Layer (2) was formed.
[0146]
(Formation of resin layer)
Add 1 part by weight of silane-based curing agent CR-15 (made by GE Toshiba Silicone) to 100 parts by weight of Silicone Varnish TSR-145 (made by GE Toshiba Silicone), add 120 parts by weight of ethanol and 80 parts by weight of toluene, and apply resin layer Liquid. This coating solution was applied to the hard coat layer (2) surface of the PET film, dried, and cured at 90 ° C. for 2 hours to form a 1 μm thick resin layer (3).
[0147]
(Formation of functional layer)
300 parts by weight of ethanol was added to 100 parts by weight of ITO fine particles SUFP-HX (manufactured by Sumitomo Metal Mining Co., Ltd.) having a primary particle size of 5 to 30 nm, and the media was dispersed as zirconia beads with a disperser. The obtained coating liquid was applied onto the resin layer (3) using a bar coater, and dried by sending hot air of 50 ° C. The obtained film is hereinafter referred to as a pre-compression ITO film. The thickness of the ITO-containing coating film was 1.7 μm.
[0148]
First, a preliminary experiment for confirming the compression pressure was performed.
Room temperature (23 ° C.) without rotating the roll and heating the roll using a roll press machine having a pair of metal rolls having a diameter of 140 mm (the roll surface is hard chrome plated) The ITO film before compression was sandwiched and compressed. At this time, the pressure per unit length in the film width direction was 660 N / mm. Next, when the pressure was released and the length of the compressed portion in the longitudinal direction of the film was examined, it was 1.9 mm. From this result, 347 N / mm per unit area²It will be compressed with the pressure of.
[0149]
Next, the pre-compression ITO film similar to that used in the preliminary experiment was sandwiched between metal rolls and compressed under the above conditions, and the roll was rotated and compressed at a feed rate of 5 m / min. In this way, a compressed ITO film was obtained. The thickness of the ITO compressed layer (4) was 1.0 μm.
[0150]
(Heat treatment)
The compressed ITO film was placed in an atmosphere of 100 ° C. for 2 hours.
[0151]
(Electrical resistance)
Before forming the adhesive layer, the electrical resistance of the ITO compressed layer (4) was measured. The film on which the ITO compressed layer (4) was formed was cut into a size of 50 mm × 50 mm. The electrical resistance was measured by applying a tester to two corners at the diagonal positions and found to be 1 kΩ.
[0152]
(Formation of adhesive layer)
100 parts by weight of acrylic resin 103B (Tg: about 40 ° C., solid content 50%, manufactured by Taisei Kako Co., Ltd.), 50 parts by weight of GPO-303 (manufactured by Nippon Kayaku Co., Ltd.), 183 parts by weight of toluene, light 1 part by weight of a polymerization initiator KAYACURE DETX-S (manufactured by Nippon Kayaku Co., Ltd.) was added to prepare an adhesive layer coating solution. The coating solution was applied onto the heat treated ITO film compression layer (4) and dried to form a 20 μm thick adhesive layer (5). When the adhesive layer (5) was touched with a finger, there was a feeling of tack. In this way, a functional film was obtained.
[0153]
(Granting a functional layer to a glass plate)
First, the surface treatment of the object glass plate was performed. To 100 parts by weight of silane coupling agent KBM503 (manufactured by Shin-Etsu Chemical Co., Ltd.), 0.9 part by weight of acetic acid (1N) and 21 parts by weight of water were added for hydrolysis. 100 parts by weight of ethanol was added to 1 part by weight of the hydrolyzed silane coupling agent solution to obtain a surface treatment solution. This surface treatment liquid was applied onto a glass plate using a cotton swab and dried. The glass plate was placed in an atmosphere at 110 ° C. for 5 minutes to react the silane coupling agent with the glass. Thereafter, excess silane coupling agent on the glass plate was wiped off with a cloth soaked with ethanol.
[0154]
Next, the obtained functional film was attached with a laminator so that the adhesive layer (5) was in contact with the surface-treated glass plate. The adhesive layer (5) was cured by irradiating with ultraviolet rays. The support PET film (1) was peeled off. The adhesive layer (5) was very strong. In this way, as shown in FIG. 10, the ITO compressed layer (4) was applied on the glass plate (6) via the adhesive layer (5).
[0155]
(Scratch property)
The ITO compression layer (4) on the glass plate (6) was rubbed with a nail, but the compression layer was not peeled off.
[0156]
(Lamination with release film)
Separately, a release film was laminated on the adhesive layer (5) surface of the functional film obtained by forming the adhesive layer. Thereafter, the laminated release film was peeled off, but there was no transfer of the adhesive to the release film.
[0157]
[Example 2: First embodiment]
The target object was changed from the glass plate of Example 1 to a polycarbonate plate (5 mm thick). No surface treatment with a silane coupling agent was performed.
The functional film obtained in Example 1 was attached with a polycarbonate plate in the same manner as in Example 1 to give an ITO compression layer.
[0158]
[Example 3: First mode, exposure after application of functional layer]
As shown in FIG. 4, a functional film for transfer of the first form having a resin layer (3), a functional layer (4) and an adhesive layer (5) in this order on a support (1) was prepared. .
[0159]
(Formation of resin layer)
400 parts by weight of methyl ethyl ketone was added to 100 parts by weight of acrylic resin 103B (manufactured by Taisei Kako Co., Ltd., solid content concentration 50%) to prepare a coating solution. The coating solution was applied to a 75 μm thick PET film (1) (HSL, manufactured by Teijin DuPont Film) and dried to form a 1.0 μm acrylic resin layer (3).
[0160]
(Formation of functional layer)
An ITO compressed layer (4) having a thickness of 1.0 μm was formed on the acrylic resin layer (3) by the same operation as in Example 1.
[0161]
(Formation of adhesive layer)
Adhesive layer coating solution by adding 50 parts by weight of UV curable resin SD318 and 183 parts by weight of methyl ethyl ketone to 100 parts by weight of acrylic resin 103B (Tg: about 40 ° C., solid concentration 50%, manufactured by Taisei Kako Co., Ltd.) It was.
First, an adhesive layer coating solution was applied to a silicone-treated release PET film S314 (manufactured by Teijin DuPont Films) and dried to form an adhesive layer on the release PET film.
Next, the film on which the ITO compressed layer (4) was formed and the peeled PET film on which the adhesive layer was formed were laminated so that the ITO compressed layer (4) and the adhesive layer were in contact with each other. In this way, an adhesive layer (5) was formed on the ITO compression layer (4) to obtain a functional film for transfer. The release PET film is not shown in FIG.
[0162]
(Granting a functional layer to a glass plate)
Similarly to Example 1, the surface of the target glass plate was treated with a silane coupling agent. Peeling off the functional film for transfer The PET film was peeled off and attached with a laminator so that the adhesive layer (5) was in contact with the surface-treated glass plate. The adhesive layer (5) was cured by irradiating with ultraviolet rays, and the support PET film (1) was peeled off.
[0163]
(Removal of acrylic resin layer)
The glass plate on which the ITO layer was formed was immersed in a container containing methyl ethyl ketone for 3 minutes. Thereafter, the glass plate was taken out, wiped with gauze containing methyl ethyl ketone, the acrylic resin layer (3) was removed, and methyl ethyl ketone was dried. In this way, the ITO compressed layer (4) was exposed.
[0164]
(Measurement of electrical resistance)
The glass plate from which the ITO compressed layer (4) was exposed was cut into a size of 50 mm × 50 mm. The electrical resistance was measured by applying a tester to two corners at the diagonal positions and found to be 1 kΩ.
[0165]
[Example 4: First mode, exposure after application of functional layer]
As shown in FIG. 3, a functional film for transfer according to a first embodiment having a resin layer (3) and a functional layer (4) in this order on a support (1) was prepared.
[0166]
(Formation of resin layer)
400 parts by weight of methyl ethyl ketone was added to 100 parts by weight of acrylic resin 103B (manufactured by Taisei Kako Co., Ltd., solid content concentration 50%) to prepare a coating solution. The coating solution was applied to a 75 μm thick PET film (1) (HSL, manufactured by Teijin DuPont Film) and dried to form a 0.5 μm acrylic resin layer (3).
[0167]
(Formation of functional layer)
An ITO compressed layer (4) having a thickness of 1.0 μm was formed on the acrylic resin layer (3) by the same operation as in Example 1. In this way, a functional film for transfer was obtained.
[0168]
(Formation of adhesive layer on target PET film)
A 188 μm-thick PET film (HPE, manufactured by Teijin DuPont Films) was used as the target object.
Adhesive layer coating solution by adding 50 parts by weight of UV curable resin SD318 and 183 parts by weight of methyl ethyl ketone to 100 parts by weight of acrylic resin 103B (Tg: about 40 ° C., solid concentration 50%, manufactured by Taisei Kako Co., Ltd.) It was.
An easily adhesive-treated PET film having a thickness of 188 μm HPE (manufactured by Teijin DuPont Film) was coated with an adhesive layer coating solution and dried to form an adhesive layer on the PET film.
[0169]
(Addition of functional layer to target PET film)
The transfer functional film and the PET film on which the adhesive layer is formed are laminated so that the ITO compressed layer (4) and the adhesive layer are in contact with each other, and the adhesive layer is cured by irradiating with ultraviolet rays. The PET film (1) was peeled off.
[0170]
(Removal of acrylic resin layer)
The PET film on which the ITO layer was formed was immersed in a container containing methyl ethyl ketone for 1 minute. Thereafter, the PET film was taken out, wiped with gauze containing methyl ethyl ketone, the acrylic resin layer (3) was removed, and methyl ethyl ketone was dried. In this way, the ITO compressed layer (4) was exposed.
[0171]
(Measurement of electrical resistance)
The PET film from which the ITO compressed layer (4) was exposed was cut into a size of 50 mm × 50 mm. The electrical resistance was measured by applying a tester to two corners at the diagonal positions and found to be 1 kΩ.
[0172]
[Example 5: Second embodiment]
As shown in FIG. 4, a functional film for transfer of the second form having a resin layer (3), a functional layer (4) and an adhesive layer (5) in this order on the support (1) was prepared. .
[0173]
(Formation of resin layer)
A silicone resin was used as the hard resin layer. 100 parts by weight of A solution of FRESSERA N (manufactured by Matsushita Electric Works Co., Ltd.) and 300 parts by weight of solution B were mixed to obtain a coating solution for the resin layer. After corona treatment on a 75 μm thick PET film (1) (HSL, manufactured by Teijin DuPont Film), the coating solution was applied on the film (1), dried, cured at 70 ° C. for 24 hours, and 0.7 μm A thick silicone resin layer (3) was formed.
[0174]
(Formation of functional layer)
On the silicone resin layer (3), an ITO compressed layer (4 μm in thickness) using ITO fine particles (manufactured by Dowa Mining Co., Ltd.) having a primary particle size of 10 to 30 nm by the same operation as in Example 1. ) Formed.
[0175]
(Heat treatment)
The ITO film after the formation of the ITO compression layer (4) was placed in an atmosphere at 70 ° C. for 1 hour.
[0176]
(Formation of adhesive layer)
To 100 parts by weight of acrylic resin 1BR-305 (solid content: 39.5%, manufactured by Taisei Kako Co., Ltd.), 120 parts by weight of UV curable hard coat liquid UVHC1101 (manufactured by GE Toshiba Silicone) and 312 parts by weight of methyl ethyl ketone were added. An adhesive layer coating solution was obtained. The coating solution was applied onto the heat-treated ITO film compression layer (4) and dried to form a 10 μm thick adhesive layer (5).
[0177]
(Applying a functional layer to a polycarbonate plate)
  The obtained functional film was attached with a laminator so that the adhesive layer (5) was in contact with the polycarbonate plate (2 mm thickness). The adhesive layer (5) was cured by irradiating with ultraviolet rays. The support PET film (1) was peeled off. The silicone resin layer (3) was peeled off together with the PET film (1), and the ITO compressed layer (4) was exposed. In this way, figure11As shown in FIG. 1, an ITO compression layer (4) was applied on a polycarbonate plate (6) via an adhesive layer (5).
[0178]
(Electrical resistance)
The polycarbonate plate provided with the ITO compression layer (4) was cut into a size of 50 mm × 50 mm. When the electrical resistance was measured by applying a tester to two points at the diagonal corners, it was 3 kΩ.
[0179]
[Example 6: Second form, patterning of ITO compression layer]
This embodiment is an example in which a contact resistance type matrix type touch panel is used. A functional film for transfer prepared in Example 5, that is, a silicone resin layer (3), an ITO compression layer (4) and an adhesive layer (5) in this order on the PET film support (1) shown in FIG. The functional film for transfer possessed by the above was used.
[0180]
(Pattern of ITO compression layer on glass plate)
In the same manner as in Example 1, the surface treatment of the target glass plate was performed using a silane coupling agent KBM503 (manufactured by Shin-Etsu Chemical Co., Ltd.).
The functional film for transfer was cut into a tape having a width of 4 mm, and the obtained tape-like functional film was cut into a length of 10 cm to obtain five tapes. These five tapes were affixed by a laminator so that the distance between them was 2 mm in parallel (that is, at a pitch of 6 mm) and the adhesive layer (5) was in contact with the surface-treated glass plate. The adhesive layer (5) was cured by irradiating with ultraviolet rays. The support PET film (1) was peeled off. The silicone resin layer (3) was peeled off together with the PET film (1), and the ITO compressed layer (4) was exposed. In this way, as shown in FIG. 15, the ITO compression layer (4) was patterned on the glass plate (6) via the adhesive layer (5).
[0181]
(Electrical resistance)
1 cm from both ends in the longitudinal direction of each ITO compression layer (4) and two points in the center in the width direction (P₁) (P₂) Was applied to the tester (that is, the tester interval was 8 cm), and the electrical resistance was measured. For any ITO compressed layer (4), the electrical resistance was 15 kΩ. Further, there was no conduction between the five ITO compressed layers (4).
[0182]
[Example 7: Third embodiment, non-glare treatment]
As shown in FIG. 9, a transfer having a hard coat layer (12), a resin layer (13), a functional layer (14) and an adhesive layer (15) in this order on the non-glare-treated surface of the support (11). A functional film was created.
[0183]
(Formation of hard coat layer)
As a support having a non-glare surface, PET film U4 (manufactured by Teijin DuPont Films) was used.
A silicone hard coat liquid KP-854 (manufactured by Shin-Etsu Chemical Co., Ltd.) is applied onto the non-glare surface of a PET film U4 (11) having a thickness of 50 μm, dried, and cured at 90 ° C. for 2 hours to form a silicone hard coat layer. (12) was formed.
[0184]
(Formation of resin layer)
Add 1 part by weight of silane-based curing agent CR-15 (made by GE Toshiba Silicone) to 100 parts by weight of Silicone Varnish TSR-145 (made by GE Toshiba Silicone), add 120 parts by weight of ethanol and 80 parts by weight of toluene, and apply resin layer Liquid. This coating solution was applied to the hard coat layer (12) surface of the PET film, dried, and cured at 90 ° C. to form a 1 μm thick resin layer (13).
[0185]
(Formation of functional layer)
300 parts by weight of ethanol was added to 100 parts by weight of ITO fine particles SUFP-HX (manufactured by Sumitomo Metal Mining Co., Ltd.) having a primary particle size of 5 to 30 nm, and the media was dispersed as zirconia beads with a disperser. The obtained coating liquid was applied onto the resin layer (13) using a bar coater, and dried by sending hot air of 50 ° C. The obtained film is hereinafter referred to as a pre-compression ITO film. The thickness of the ITO-containing coating film was 1.7 μm.
[0186]
First, a preliminary experiment for confirming the compression pressure was performed.
Room temperature (23 ° C.) without rotating the roll and heating the roll using a roll press machine having a pair of metal rolls having a diameter of 140 mm (the roll surface is hard chrome plated) The ITO film before compression was sandwiched and compressed. At this time, the pressure per unit length in the film width direction was 660 N / mm. Next, when the pressure was released and the length of the compressed portion in the longitudinal direction of the film was examined, it was 1.9 mm. From this result, 347 N / mm per unit area²It will be compressed with the pressure of.
[0187]
Next, the pre-compression ITO film similar to that used in the preliminary experiment was sandwiched between metal rolls and compressed under the above conditions, and the roll was rotated and compressed at a feed rate of 5 m / min. In this way, a compressed ITO film was obtained. The thickness of the ITO compressed layer (14) was 1.0 μm.
[0188]
(Heat treatment)
The compressed ITO film was placed in an atmosphere of 100 ° C. for 2 hours.
[0189]
(Electrical resistance)
Before forming the adhesive layer, the electrical resistance of the ITO compressed layer (14) was measured. The film on which the ITO compressed layer (14) was formed was cut into a size of 50 mm × 50 mm. The electrical resistance was measured by applying a tester to two corners at the diagonal positions and found to be 1 kΩ.
[0190]
(Formation of adhesive layer)
Add 100 parts by weight of acrylic resin 103B (manufactured by Taisei Kako), 50 parts by weight of GPO-303 (manufactured by Nippon Kayaku), 183 parts by weight of toluene, and 1 part by weight of KAYACURE DETX-S (manufactured by Nippon Kayaku). A layer coating solution was obtained. The coating solution was applied onto the heat treated ITO film compression layer (14) and dried to form an adhesive layer (15) having a thickness of 20 μm. When the adhesive layer (15) was touched with a finger, there was a tackiness. In this way, a functional film for transfer was obtained.
[0191]
(Transfer to glass plate)
First, the surface treatment of the object glass plate was performed. Acetic acid (1N) 0.9 part by weight and water 21 part by weight were added to 100 parts by weight of the silane coupling agent KBM503 (manufactured by Shin-Etsu Chemical) and hydrolyzed. 100 parts by weight of ethanol was added to 1 part by weight of the hydrolyzed silane coupling agent solution to obtain a surface treatment solution. This surface treatment liquid was applied onto a glass plate using a cotton swab and dried. The glass plate was placed in an atmosphere at 110 ° C. for 5 minutes to react the silane coupling agent with the glass. Thereafter, excess silane coupling agent on the glass plate was wiped off with a cloth soaked with ethanol.
[0192]
Next, the obtained functional film was attached with a laminator so that the adhesive layer (15) was in contact with the surface-treated glass plate. The adhesive layer (15) was cured by irradiating with ultraviolet rays. The support PET film (11) was peeled off. In this way, as shown in FIG. 14, the ITO compression layer (14) is applied on the glass plate (16) via the adhesive layer (15), and the hard coat layer (12 ) Is exposed.
[0193]
(Measurement of reflection characteristics)
The non-glare-treated surface of the obtained non-glare-treated glass plate (16) was painted black with a black oil-based pen. Reflected light was measured by combining a spectrophotometer V-570 (manufactured by JASCO) with an integrating sphere (manufactured by JASCO). The glass plate (16) was set on the integrating sphere so as to be a non-glare-treated surface (the surface on which the integrating sphere side was non-glare-treated) on which the light hits. The reflectance of all the reflected light rays having a wavelength of 550 nm was 4.7%. Next, the reflectance (that is, the reflectance of scattered light) excluding regular reflection light having a wavelength of 550 nm was measured and found to be 2.4%. More than half of the reflected light was scattered, reducing reflections.
[0194]
(Comparison of reflection characteristics)
For comparison, the reflection characteristics of a glass plate not subjected to surface treatment were measured.
One side of the glass plate was painted black with a black oil pen. The glass plate was set on the integrating sphere so that it was a surface that was not painted black when exposed to light (the integrating sphere side was the glass surface). The reflectance of all the reflected light rays having a wavelength of 550 nm was 4.8%. Next, the reflectance (that is, the reflectance of scattered light) excluding regular reflection light having a wavelength of 550 nm was measured and found to be 0.1%. Most of the reflected light was specularly reflected without scattering, and the reflection was intense.
[0195]
In the said Example, the example which produced the functional film for transfer which has a transparent conductive layer using ITO microparticles | fine-particles as an inorganic microparticle was shown. In the same manner as in the above examples, functional films for transfer having various inorganic functional layers can be produced using inorganic fine particles having various properties. Of course, as the target object, various objects that need to be provided with a functional layer and various objects that need to be provided with a functional layer and non-glare treatment can be selected. For this reason, the above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Furthermore, all modifications belonging to the equivalent scope of the claims are within the scope of the present invention.
[0196]
【The invention's effect】
According to the present invention, a functional film for transfer having a functional layer with excellent performance can be obtained by a simple operation of coating and compression. According to the present invention, there are provided an object provided with the functional layer and a method for producing the object provided with the functional layer. The present invention is particularly advantageous when a functional layer having a uniform thickness is applied to an object having poor flexibility such as a plate material.
[0197]
According to the present invention, it is possible to obtain a functional film for transfer that can impart a functional layer having excellent performance to a target object and can be subjected to non-glare treatment by a simple operation of coating and compression. According to the present invention, an object provided with the functional layer and subjected to non-glare treatment and a method for manufacturing the same are provided. In particular, the present invention is advantageous when a functional layer having a uniform thickness is applied to an object having poor flexibility such as a plate material and non-glare treatment is performed.
[0198]
ADVANTAGE OF THE INVENTION According to this invention, the adhesive composition suitable as an adhesive agent for functional films is provided. Furthermore, the functional film which has the adhesive bond layer formed from the said adhesive composition is provided.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a form of peeling.
FIG. 2 is a cross-sectional view showing an example of a functional film of the present invention.
FIG. 3 is a cross-sectional view showing an example of the functional film of the present invention.
FIG. 4 is a cross-sectional view showing an example of the functional film of the present invention.
FIG. 5 is a cross-sectional view showing an example of the functional film of the present invention.
FIG. 6 is a cross-sectional view showing an example of the functional film of the present invention.
FIG. 7 is a cross-sectional view showing an example of a functional film according to the third embodiment of the present invention.
FIG. 8 is a cross-sectional view showing an example of a functional film according to the third embodiment of the present invention.
FIG. 9 is a cross-sectional view showing an example of a functional film according to the third embodiment of the present invention.
FIG. 10 is a cross-sectional view showing an example of an object provided with a functional layer of the present invention.
FIG. 11 is a cross-sectional view showing an example of an object provided with a functional layer of the present invention.
FIG. 12 is a diagram for explaining peeling during transfer using the functional film of the present invention.
FIG. 13 is a cross-sectional view showing an example of an object provided with a functional layer of the present invention and subjected to non-glare treatment.
FIG. 14 is a cross-sectional view showing an example of an object provided with a functional layer of the present invention and subjected to non-glare treatment.
FIG. 15 is a plan view showing an example of an object patterned with a functional layer of the present invention.
[Explanation of symbols]
(1): Support
(2): Hard coat layer
(3): Resin layer
(4): Functional layer
(5): Adhesive layer
(6): Target object
(11): Support
(11n): Non-glare surface of the support
(12): Hard coat layer
(12n): Non-glare surface of hard coat layer
(13): Resin layer
(13n): Non-glare surface of resin layer
(14): Functional layer
(15): Adhesive layer
(16): Target object

Claims (22)

On the support, a functional film having at least a functional layer that can be peeled from the support,
The functional layer includes a conductive layer, an ultraviolet shielding layer, an infrared shielding layer, a magnetic layer, a ferromagnetic layer, a dielectric layer, a ferroelectric layer, an electrochromic layer, an electroluminescence layer, an insulating layer, a light absorption layer, and a light selection layer. absorbing layer, reflecting layer, anti-reflection layer, those selected from the group consisting 及 beauty photocatalyst layer,
The functional layer compresses a functional fine particle-containing layer formed by applying and drying a liquid in which the functional fine particles constituting the layer are dispersed on a support with a compressive force of 44 N / mm ² or more. Ri compressed layer der functional fine particles obtained by,
The liquid in which the functional fine particles are dispersed is
It does not contain resin, or
A functional film for transfer, which is expressed by a volume before dispersion and contains a resin having a volume of less than 25 when the volume of the functional fine particles is 100 . A layer that can be peeled off from the support is formed on the support, a compressed layer of the functional fine particles is formed on the peelable layer, and the peelable layer together with the compressed layer of the functional fine particles can be separated from the support, the transfer functional film of claim 1. The functional film for transfer according to claim 2 , wherein the peelable layer includes a resin layer containing a resin as a main component. The functional film for transfer according to claim 2 or 3 , wherein the peelable layer includes a hard coat layer formed on the support and the resin layer formed on the hard coat layer.   The underlayer is formed on the support, the compressed layer of the functional fine particles is formed on the underlayer, and the compressed layer of the functional fine particles can be peeled from the underlayer. Functional film for transfer. The functional film for transfer according to claim 5 , wherein the underlayer is a resin layer containing a resin as a main component. The functional film for transfer according to claim 1 , wherein the surface of the support on the functional layer side is non-glare-treated. A layer that can be peeled off from the support is formed on the support, a compressed layer of the functional fine particles is formed on the peelable layer, and the peelable layer together with the compressed layer of the functional fine particles The functional film for transfer according to claim 7 , which is peelable from the support. The functional film for transfer according to claim 8 , wherein the peelable layer includes a resin layer containing a resin as a main component. The functional film for transfer according to claim 8 or 9 , wherein the peelable layer includes a hard coat layer formed on the support and the resin layer formed on the hard coat layer. The functional film for transfer according to any one of claims 1 to 10 , wherein the compressed layer of the functional fine particles is a transparent conductive layer. The functional film for transfer according to any one of claims 1 to 11 , wherein an adhesive layer is formed on the compressed layer of the functional fine particles. The adhesive layer contains a polymer resin component (P) having a glass transition temperature Tg of 30 ° C. or higher and a curable low molecular component (M) in a weight ratio P / M = 8/2 to 2/8. The functional film for transfer according to claim 12 , wherein the functional film is formed from an adhesive composition. The functional film for transfer according to claim 13 , wherein in the adhesive composition, the polymer resin component (P) is solid at room temperature, and the curable low molecular component (M) is liquid at room temperature. The functional film for transfer according to claim 13 or 14 , wherein in the adhesive composition, the polymer resin component (P) is an acrylic resin, and the curable low molecular component (M) is an acrylic monomer. The functional film for transfer according to any one of claims 13 to 15 , wherein a photopolymerization initiator is further contained in the adhesive composition. The functional film for transfer according to any one of claims 13 to 16 , wherein the adhesive composition is cured by light irradiation. An object provided with the functional layer of the functional film for transfer according to any one of claims 1 to 17 . The object according to claim 18 , wherein the functional layer surface is exposed. An object to which a peelable layer including the functional layer of the functional film for transfer according to any one of claims 7 to 10 is applied and non-glare treatment is performed. The functional layer of the functional film for transfer according to any one of claims 1 to 17 on a target object to which an adhesive layer and / or a functional layer of the functional film is to be provided from a support. A method for producing an object provided with a functional layer, wherein the object is transferred onto the target object via an adhesive layer provided on the object. The peelable layer including the functional layer of the functional film for transfer according to any one of claims 7 to 10 is applied from the support onto the target object to which the functional layer is to be applied. A method for producing a non-glare-treated object provided with a functional layer, wherein transfer is performed so that the release surface of the film is on the outside.

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