JP6501070B2 - Functional film - Google Patents

Description

The present invention relates to a functional fill beam to be transferred to the surface of the resin molded article.

  In recent years, in order to reduce surface reflection light from outside light on the surface of TVs, displays for mobile devices, displays for car navigation, and touch panel displays, and to suppress reflections, anti-reflection (called AR after Anti-Reflection) processing on the substrate surface It is common to apply. As a processing method, when processing AR material directly on the substrate surface used for a display by coating, vapor deposition, sputtering, etc., and various methods such as transferring an AR-treated film to the substrate surface, etc. AR processing is used.

  Among them, in recent years, in the case of various resin molded products such as displays and cover lenses, as a method that can be mass-produced inexpensively, a PET film with AR is preformed in advance to a mold for preform, Thereafter, there is an insert molding method in which the preformed AR-added PET film is set in a mold for injection molding and transferred onto the surface of an injection molded resin such as polycarbonate (PC) resin by integral molding.

  A general insert molding AR film used for insert molding will be described using FIGS. 7 and 8. FIG. 7 is a cross-sectional view showing the layer structure of a general AR film for insert molding, and FIG. 8 is a schematic view for explaining the process of insert molding in the order of steps.

  As shown in FIG. 7, in the AR film 100 for insert molding, the hard coat layer 103 and the AR layer 102 are laminated on the base film 101, and the adhesive layer 104 is formed on the back surface of the base film 101 on which the hard coat layer 103 is formed. It is the structure formed. The base film 101 is a film made of PET or an acrylic film as a base material of the AR film 100 for insert molding. The AR layer 102 is a layer which reduces the reflection of external light on the surface of the molded article on the outermost surface of the molded article. The AR layer 102 may be formed of a plurality of layers having different refractive indices. The hard coat layer 103 is a layer for imparting strength and hardness to the AR layer 102, and may be a protective layer. The adhesive layer 104 is a layer that plays a role of adhering the AR film 100 for insert molding to the surface of the molten resin during insert molding. As described above, the AR film 100 for insert molding is composed of a plurality of layers.

  A manufacturing process for transferring the AR film 100 for insert molding onto the surface of a molded article will be described with reference to FIG. In FIG. 8, in step A-1, first, the AR film 100 for insert molding is disposed between the fixed mold 1A for the preform and the movable mold 2A. The AR film 100 for insert molding is a sheet film. At this time, the AR film 102 for insert molding is disposed with the AR layer 102 facing the movable mold 2A. In addition, the AR film 100 for insert molding is sucked by the suction holes 4 provided in the movable mold 2A. Next, in step A-2, the movable mold 2A is operated to perform mold clamping, and the AR film 100 for insert molding is preformed. Thereafter, in step A-3, the movable mold 2A is returned to its original state, and the preformed AR film 100 for insert molding is taken out of the mold. Next, the AR film 100 for insert molding preformed in step B-1 is disposed in the movable mold 2B and the fixed mold 1B for main molding. At this time, the AR layer 102 is disposed to face the movable mold 2B provided with the suction holes 4. At this time, the AR film 100 for insert molding preformed in the suction hole 4 is sucked. Next, mold clamping is performed in step B-2. Next, the melted resin 6 is poured into the mold from the gate 5 vacant in the process mold in step B-3, and is bonded to the adhesive layer 104 provided on the opposite side of the AR layer 102 of the AR film 100 for insert molding. In step B-4, mold opening is performed, and a molded product 105 integrally molded with the AR film 100 for insert molding is taken out from the inside of the mold with a protruding pin (not shown). Next, in the molded product 105, unnecessary film portions on the end surface of the molded product 105 are trimmed by a dedicated cutter 106 in step C-1. The final AR-added insert molding is completed in step C-2 where the trimming is finished. This process is repeated to mass produce.

  The PET film used for the AR film 100 for insert molding mainly uses a biaxially stretched film. The biaxially stretched film produces a film while being stretched in the width direction perpendicular to the feed direction at the time of production. Therefore, residual stress tends to be left inside the film, and a location where the residual stress distribution is not uniform tends to occur in the plane of the PET film. Since the places where the residual stress is large and the places where the residual stress is small occur, a refractive index difference is generated inside the PET film. As a result, when an image is projected from the inside of the display by transferring the image onto the surface of a molded resin molded article, the behavior of the light is as light incident on the inside of the cover lens from the inside enters the PET film. At a location where the residual stress is large, the difference in refractive index becomes large inside the base material, and the light reflection becomes large. On the other hand, in the portion where the residual stress is small, the refractive index difference inside the base is smaller than the portion where the residual stress is large, and the amount of light reflection is also small. Therefore, as a result of changing the way of light reflection in the place where the residual stress is large and the small place, when the light passing through the part where the residual stress is large and the place where the residual stress is small respectively enters human eyes, The difference in the amount of reflection is recognized as color unevenness on the display. As a result, the AR film 100 for insert molding in which a portion with a large residual stress is present can not be used and is treated as a defect, resulting in manufacturing with a large amount of loss. In addition, in the case of insert molding, the molding process also involves many steps including a preform process, a main molding process, and a trimming process, and has a problem that the number of production processes increases and the production cost also increases.

In order to solve the above problems, there is an in-mold molding method in which only the AR layer is transferred without transferring the film without requiring a preform and trimming step.
The configuration and manufacturing method of a general transfer type AR film used in in-mold molding will be described using FIGS. 9 and 10. FIG. 9 is a cross-sectional view showing the layer structure of a general transfer type AR film, and FIG. 10 is a schematic view for explaining the steps of in-mold molding in order of steps.

  As shown in FIG. 9, the transfer type AR film 301 is a continuous film. The transfer type AR film 301 is roughly divided into a carrier layer 302 which is not transferred to the molded product and a transfer layer 303 which is transferred to the surface of the molded product. Describing the transfer type AR film 301 in more detail, reference numeral 201 denotes a base film made of PET, an acrylic film or the like which plays a role of continuously supplying the transfer type AR film 301 into the mold. A release layer 202 is formed in contact with the base film 201 to release the transfer layer 303 transferred to the base film 201 and the molded product. The carrier film 302 is composed of the base film 201 and the release layer 202. An AR layer 203 is formed on the back surface of the release layer 202 with respect to the surface in contact with the base film 201 and reduces the reflection of external light on the surface of the molded article on the outermost surface of the molded article. A hard coat layer 204 is formed on the back surface of the AR layer 203 with respect to the surface in contact with the peeling layer 202 to give the AR layer 203 strength and hardness, and may be a protective layer. An adhesive layer 205 is formed on the back surface of the hard coat layer 204 in contact with the AR layer 203 and serves to adhere the transfer layer 303 to the molten resin. The transfer layer 303 is composed of the AR layer 203, the hard coat layer 204 and the adhesive layer 205. With regard to the adhesive layer 205, when the hard coat layer 204 also has an adhesive function with a molten resin, it is not necessary to form it in particular. As described above, the transfer type AR film 301 is composed of a plurality of layers.

  A manufacturing process for transferring the transfer type AR film 301 onto the surface of a molded product by in-mold molding will be described with reference to FIG. In FIG. 10, in step A, first, the transfer type AR film 301 is fed between the fixed mold 1 and the movable mold 2 to a predetermined position using the foil feeding device 3. At this time, the transfer type AR film 301 is disposed such that the base film 201 faces the movable mold 2 side. Further, the transfer type AR film 301 may be preheated by a heater (not shown) so as to be easily molded into the mold, and then fed into the mold. Next, after the transfer type AR film 301 has been fed to a predetermined position, the transfer type AR film 301 is suctioned by the suction holes 4 provided in the cavity surface of the movable mold 2 in step B. The transfer AR film 301 is shaped. At that time, the outer periphery of the transfer type AR film 301 is fixed and positioned by a film pressing mechanism (not shown). Thereafter, in step C, the movable mold 2 is moved and clamped. Next, in step D, the melted resin 6 is injected from the gate 5 of the fixed mold 1 toward the adhesive layer of the transfer AR film 301, and the melted resin 6 is filled in the cavity in the mold. When the filling of the molten resin 6 is completed in the step E, the molten resin 6 is cooled to a predetermined temperature. In step F, the movable mold 2 is moved to open the mold, and when taking out the in-molded molded product 7, the carrier layer 302 of the transfer type AR film 301 is peeled off from the in-molded molded product 7. The AR layer 203 is transferred to the outermost surface of the molded article 7 which has been transferred and in-molded. Thereafter, in step G, the ejector pin 8 on the fixed mold 1 side is extruded and the molded product 7 is taken out of the mold. In step H, the adsorption of the carrier film 302 of the transfer type AR film 301 in the movable mold 2 in the suction holes 4 of the movable mold 2 is stopped in preparation for the next molding, and the next molding is performed by the foil feeder 3. The transfer type AR film 301 (carrier layer 302, transfer layer 303) used for the above is sent to a predetermined position, and this operation is repeated to perform continuous forming.

  In the case of the in-mold molding method, PET, which is the base film 201, plays a role of a carrier for feeding the transfer layer 303 into the mold, and is not transferred to the molded product. Problem does not occur. Also, the transfer AR film 301 is sent directly from the beginning into the mold for injection molding, and the transfer layer 303 is transferred onto the surface of the molded product simply by removing the molded product 7 from the mold, so that the film preform and No trimming step is required, the productivity is high, and the manufacturing can be performed more efficiently and at a lower cost than the insert molding method (see, for example, Patent Document 1).

  Here, in the AR film on the outermost surface of a resin molded product used for applications such as displays, it is generally required that an anti-fingerprint function is required simultaneously with the AR function. There are mainly two types of materials that exhibit fingerprint resistance performance, a water / oil repellent system and a hydrophilic / lipophilic system. The water- and oil-repellent fingerprint resistant material makes fingerprints less likely to adhere to the surface of the AR layer by repelling the fingerprint with the fingerprint resistant material formed on the surface of the AR layer, and wipes off the fingerprints in a detached state on the surface of the AR layer. It makes it easy. On the other hand, the hydrophilic / lipophilic fingerprint resistant material makes the fingerprint attached to the AR layer conform on the surface of the AR layer and makes the fingerprint inconspicuous. However, in general, the hydrophilic / lipophilic fingerprint-resistant material tends to be more susceptible to stains due to fingerprint deposits while fingerprints are repeatedly attached and fitted. Therefore, it is preferable to use a water and oil repellent fingerprint resistant material as the fingerprint resistant material.

  As a wet coating liquid for forming an AR layer, AR is generally selected from silicone resin which is an inorganic material from the viewpoint of coating film strength and weather resistance, acrylic resin of ultraviolet curing type, acrylic resin of two-component curing type, etc. In many cases, the matrix resin constituting the layer is formed.

  In this case, the AR material is formed from a thermosetting type coating liquid manufactured by a sol-gel method or a coating liquid using an ultraviolet curable resin. In each of the coating solutions, if necessary, the coating solution is coated, and then subjected to a heat drying process, an ultraviolet curing process, etc. to volatilize the solvent, and then the matrix resin is cured to form a film.

  In the case of a coating liquid using a sol-gel method, an inorganic resin material can be formed as a thin film by wet coating, and an AR layer in which a matrix resin is composed of an inorganic resin can be formed. As the wet coating method, there are gravure coating, die coating and the like, and uniform thin films of about several tens of nm to several hundreds of nm can be formed with high accuracy.

  In the transfer type AR film used for in-mold molding, there are several methods to impart anti-fingerprint function simultaneously with the AR function, but generally it is the outermost surface of a molded article molded using the transfer type AR film The method mainly uses a spin coater or a dip coater to process a coating solution for anti-fingerprint material on the AR layer by post-processing. In this case, since the coating solution for anti-fingerprint material is applied in a later step, the number of steps is increased, which causes an increase in processing cost. In addition, in the case of post-processing with a spin coater or dip coater, it is also necessary to perform a masking process or the like to a place where the coating solution for anti-fingerprint material is not desired to adhere. Further, as a problem other than the problem of increasing the number of man-hours, errors during handling are also increased, which tends to cause the yield to deteriorate in the production of a molded product.

  On the other hand, in the transfer type AR film, as a method of imparting a fingerprint resistance function without a post-treatment step, generally, there is a method of imparting a fingerprint resistance function in advance to the transfer type AR film. The first method is a method in which an anti-fingerprint material is first applied on a release layer formed on a PET film or on a base film if no release layer is required, and then an AR layer is applied. In this case, there is a problem that the cost of processing is increased by increasing the number of coating layers by one layer separately from the fingerprint resistant layer, but the processing time, processing cost and yield are later It is more advantageous than processing. However, it has an extremely difficult task of uniformly coating a coating solution for AR material on a water and oil repellent fingerprint resistant layer without repelling.

  Therefore, as a second method, there is a method of simultaneously providing an anti-fingerprint function in the AR layer. In this case, by dispersing a material having an anti-fingerprint function of water and oil repellency in advance in the AR material, the AR function and the anti-fingerprint function simultaneously appear on the AR layer when the AR layer is coated. It becomes. In this method, a coating solution of anti-fingerprint AR in which anti-fingerprint material is dispersed in advance in an AR material forming an AR layer is manufactured and applied. However, in this method, the anti-fingerprint material is conventionally liable to come out on the coated surface. In the transfer type AR film, after an AR layer is formed on the carrier layer, a hard coat layer and an adhesive layer are formed on the AR layer. When the AR layer is formed, the surface is the back surface of the surface on the carrier layer side of the AR layer, and the fingerprint material tends to float on this surface. After transfer, when the carrier layer is peeled off from the transfer type AR film, the surface on the carrier layer side of the AR layer becomes the outermost surface, but the fingerprint resistant material floats out on the back surface of the outermost surface of the AR layer. There is a problem that anti-fingerprint performance is difficult to appear on the outermost surface of the AR layer on the carrier layer side which becomes the surface.

  This is caused by the following reasons. Generally, it is common to add a resin and an additive consisting of a water repellent group such as fluorine type, silicone type and hydrocarbon type to a coating solution for AR material, in a water and oil repellent fingerprint resistant material . These fingerprint resistant materials having a water and oil repellent group generally have a property of low surface free energy, and when added to a coating liquid for AR material, the surface energy is low when the coating liquid is applied. Since the intermolecular interaction is difficult to work and the intermolecular force is difficult to attract, the fingerprint resistant material having a water and oil repellent group which is a material having a high surface free energy and a functional group and which has a low surface free energy is , It tends to come out on the side opposite to the base film side which is the surface of AR layer. That is, when the water and oil repellent fingerprint resistant material is added to the coating solution of the AR layer, the water and oil repellent fingerprint resistant material having low surface free energy is the surface free energy among the materials constituting the AR layer. Is more likely to be formed at the interface in contact with air than the high material. Materials with high surface free energy have high surface tension, easy intermolecular interaction, and intermolecular force and are easily attracted by the inside of the layer. When coated, the base film side of the base film, that is, the layer It shows the behavior of getting into the lower surface. As a result, it is difficult to form a fingerprint resistant material on the side of a carrier layer comprising a release layer or a PET surface on a functional film that is the outermost surface of a molded article after transfer that is originally intended to be expressed.

  As described above, in the case of imparting a fingerprint resistance function to the AR layer, a water and oil repellent material is used in the case of a hydrophilic / lipophilic fingerprint resistant material because fingerprints are deposited to cause stains. Moreover, when providing an anti-fingerprint function to AR layer, although an anti-fingerprint material can be coated on the AR film on which the AR layer is formed in a later step, extra steps are required for coating the anti-fingerprint material. Therefore, a method of dispersing a fingerprint resistant functional material in the AR layer is used. However, in the method of dispersing the anti-fingerprint functional material in the AR layer, the anti-fingerprint material is likely to come out on the surface of the AR layer because the anti-fingerprint material generally has lower surface free energy than the resin material of the AR layer. Here, in the AR film used for in-mold formation as described above, the fingerprint resistant material is the surface of the AR layer which is the inside of the transfer layer because the transfer layer such as the hard coat layer is formed after forming the AR layer on the carrier layer. It is difficult to form a fingerprint resistant material on the surface of the AR layer after transfer. On the other hand, in the AR film used for insert formation, since the AR layer is formed to be the outermost surface, a fingerprint resistant material is easily formed on the surface of the AR layer after transfer. From the above, the AR film formed by dispersing the fingerprint resistant functional material made of a water and oil repellent material in the AR layer is transferred to the surface of the resin molded product by insert formation.

JP 2012-096412 A

  However, when transferring an AR film to the surface of a resin molded product by insert formation as described above, the preform process and the trimming process are generated more than in in-mold formation, and the production process is increased. there were. In addition, there is a problem that color unevenness may occur due to the residual stress. Therefore, it is required to form a resin molded product to which a functional layer is transferred by in-mold molding using a water and oil repellent material as a fingerprint resistant material.

The present invention is a fingerprint material having a water- and oil-repellent function was dispersed in AR layer, and to provide a functional film suitable for performing in-mold forming.

  In order to achieve the above object, the functional film of the present invention at least includes a base film and a functional layer formed in contact with the base film, and the functional layer contains functional fine particles and water and oil repellency. And one or more types of graft polymers having a water- and oil-repellent functional group bonded to the main chain, and one or more first functional groups each having a surface free energy lower than that of the water- and oil-repellent functional group A plurality of types of resins, wherein the ratio of the water / oil repellent functional group per molecule of each of the graft polymers is lower than the ratio of the first functional group per molecule of each of the respective resins, In the surface of the functional layer on the side in contact with the base film, the base polymer of the functional layer is oriented when the graft polymer is more oriented than the resin and transferred to a resin molded product. Characterized in that they have surface contact with the exposed.

  As described above, the AR layer has a water- and oil-repellent function by including a graft polymer having a long-chain water- and oil-repellent group as a functional group and a resin having a lower surface free energy than the graft polymer. The graft polymer provided is easily oriented on the surface of the AR layer, and even if this AR layer is used in the AR film used for in-mold molding, the AR layer is transferred to the outermost surface of the resin molded product and has a water and oil repellent function. The in-mold formation can be performed using an AR film in which the anti-fingerprint material is dispersed in an AR layer.

Cross-sectional view illustrating the layer configuration of a transfer-type fingerprint resistant anti-reflective film according to an embodiment of the present invention Schematic showing an exemplary configuration of a graft polymer of the AR layer in the embodiment of the present invention Schematic which shows the structural example of the silicone resin of AR layer in embodiment of this invention Cross-sectional view illustrating the configuration of a coating apparatus for applying an anti-fingerprint function AR liquid to a anti-fingerprint function transfer type AR film according to an embodiment of the present invention A figure explaining an example of a hardening process of AR layer with a fingerprint function in an embodiment to the present invention. Cross-sectional view showing a configuration example of an AR molded article with anti-fingerprint function according to an embodiment of the present invention Sectional view showing the layer configuration of a general AR film for insert molding Schematic explaining the process of insert molding in order of processes Sectional view showing the layer configuration of a general in-mold forming AR film Schematic diagram for explaining the process of in-mold molding in order of process

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment
FIG. 1 is a cross-sectional view illustrating the layer structure of a transfer-type anti-fingerprint function-added AR film in the embodiment of the present invention, showing the internal structure of a water- and oil-repellent transfer-type anti-fingerprint function AR film and AR layer An enlarged view is shown. FIG. 2 is a schematic view showing a configuration example of a graft polymer of an AR layer in the embodiment of the present invention, and FIG. 3 is a schematic view showing a configuration example of a silicone resin of the AR layer in the embodiment of the present invention. In FIG. 1 to FIG. 3, the same components as in FIG.

  As shown in FIG. 1, an example of the layer configuration of a fingerprint film-resistant transfer type AR film 110 which is an embodiment of the functional film of the present invention is a base film 201, an AR layer 111 with a fingerprint-resistant function, optical adjustment A layer 112, an after cure type hard coat layer 204, a primer layer 113, and an adhesive layer 205 are included. A release layer 202 may be provided between the base film 201 and the AR layer 111. However, release is possible if the AR layer 111 with anti-fingerprint function formed directly on the base film 201 can be easily released during release. The layer 202 may not be formed. In addition, with regard to the optical adjustment layer 112, the hard coat layer 204, the primer layer 113, and the adhesive layer 205, when multiple functions can be provided by one layer, the layers may be integrated or the number of layers may be reduced. Moreover, you may provide the decoration layer which provides the designability as needed. If necessary, functional layers such as an antistatic layer and an antiblocking layer may be provided on the surface of the base film 201 opposite to the anti-fingerprint function AR layer 111.

  The structural example of the transfer type AR film 110 with a fingerprint function of this invention is demonstrated. Generally, as the thickness of the base film 201, a PET film, an acrylic film or the like having an average thickness of 20 μm to 250 μm can be used. When the thickness of the base film 201 is less than 20 μm, it is difficult to control the tension during conveyance of the base film 201, and plastic deformation causes elongation wrinkles, or lamination of various functional layers formed on the base film 201. It is easy to warp due to heat curing shrinkage and the like at the time of drying of the coating agent, and it becomes difficult to handle in the subsequent step. If it is larger than 250 μm, when the coating length becomes long at the time of roll formation, the diameter of the core of the roll during roll winding becomes too large, which makes it difficult to handle in the post process and the cost of the base film 201 itself. Can also be raised. However, even if it is out of the above range, there is no problem even if it uses base film 201 of average thickness except the above range if it can be used according to the needs at that time and a use. In this embodiment, an example in which a PET film having an average thickness of 50 μm is used as the base film 201 is described. Further, it is assumed that the AR layer 111 with anti-fingerprint function is formed directly on the base film 201 without providing the peeling layer 202. When providing the peeling layer 202, the thickness of the peeling layer 202 is formed with an average film thickness of 0.03 to 0.15 μm, and general melamine resin, olefin resin or the like can be used.

  Next, an example of the AR layer 111 with the anti-fingerprint function of the present invention will be described. The anti-fingerprint function-added AR layer 111 shown in FIG. 1 contains, in a matrix resin, low refractive index fine particles 114 made of an inorganic material as functional fine particles, a graft polymer 115 and a silicone resin 116. Here, the low refractive index fine particles 114 refer to fine particles having a refractive index lower than that of the matrix resin constituting the anti-fingerprint function AR layer 111, and having a refractive index of 1.2 or more and 1.4 or less. Examples of the low refractive index fine particles 114 include nanoparticles such as porous silica, hollow silica, magnesium fluoride, and cryolite. If it is possible to obtain similar low refractive index other than these, it is not necessary to be limited to these. These low refractive index fine particles 114 may be contained alone or in combination of two or more.

  A configuration example of the anti-fingerprint function AR layer 111 of the present invention will be described using the partially enlarged view in FIG. Moreover, the structural example of resin used for the matrix resin of AR layer 111 with a fingerprint function of this invention is demonstrated using FIG. 2, FIG. The matrix resin for forming the anti-fingerprint function-added AR layer 111 in the present embodiment is composed of, for example, a graft polymer 115 shown in FIG. 2 and a silicone resin 116 shown in FIG. The graft polymer 115 has a main chain 126 which is a basic skeleton of the graft polymer molecule and a long chain longer than the functional group 129, 130 having low surface free energy in the silicone resin 116 bonded to the main chain 126 at one end as a side chain. And a water- and oil-repellent group 119 having a surface free energy lower than that of water molecules and another functional group 127 having a function other than the water- and oil-repellent group 119 and bound to the main chain 126 at one end. . Further, the structure of the silicone resin 116 is a water / oil repellent group disposed in a main chain having a surface free energy lower than that of the water / oil repellent group 119 having a low surface free energy contained in one molecule of the graft polymer 115 And a functional group 130 which is a water- and oil-repellent group disposed in a side chain, and a ratio of the water- and oil-repellent group contained in one molecule is 1 molecule of graft polymer 115 It consists of a structure more than the ratio of the water-repellent oil-repellent group 119 contained inside. A surface group contained in one molecule of silicone resin 116 has a functional group with low surface free energy, a functional group 129 with low surface free energy and a functional group 130 with low surface free energy in silicone resin 116. The ratio of functional groups having low free energy functional group 129 and functional group 130 (= functional group with low surface free energy 129, total molecular weight of 130 / molecular weight of whole silicone resin molecule) is 1 of graft polymer 115 The content is larger than the ratio of the water repellent group 119 which is a functional group with low surface free energy contained in the molecule (= total molecular weight of functional group 119 with low surface free energy / molecular weight of whole graft polymer molecule) . Further, at least both ends of the silicone resin 116 have a hydrolyzable functional group 128. You may have a hydrolysable functional group also in site | parts other than both ends.

The low surface free energy described here is based on the surface free energy of water molecules. Therefore, a functional group lower than the surface free energy of water is described as a functional group with low surface free energy. For example, _-CF 3 is a fluorine-based fluorocarbon group, -CF ₂ -, dimethyl silicone group _{-Si (CH} 3) silicone 2 -O-, _-CH 3 is a hydrocarbon-based hydrocarbon radical, -CH _2- and the like. If it is a functional group lower than the surface free energy of water molecule also except these, it is not necessary to limit to the above.

  Among the above, the functional group with the lowest surface free energy is fluorine-based, and if you want to effectively float the silicone resin 115 on the opposite side of the substrate from the graft polymer 116, there are many in one molecule. By using the silicone resin 115 having a fluorocarbon group, it becomes possible to more effectively orient the silicone resin 115 on the coated surface on the side opposite to the substrate. The silicone resin 116 is not limited to the silane compound, as long as the resin is a silane compound, but the resin has a large percentage of functional groups whose surface free energy is lower than that of the graft polymer 115. In addition, as a silicone resin, a silicone monomer, a silicone oligomer, a silicone polymer etc. are contained, and it is set as a silicone resin as a generic term of them.

  As described above, in the functional film according to the embodiment of the present invention, the functional layer such as the AR layer 111 is formed in contact with the base film 201. The functional layer is configured to include at least functional fine particles such as the low refractive fine particles 114, a graft polymer 115, and a resin such as a silicone resin 116. The graft polymer 115 comprises at least a water / oil repellent group 119 as a functional group. The silicone resin 116 is provided with at least one or more types of functional groups whose surface free energy is equal to or lower than the surface free energy of the water / oil repellent group 119. The proportion of the water- and oil-repellent group 119 in one molecule of the graft polymer 115 is smaller than the proportion of the functional group in one molecule of the silicone resin 116. With such a configuration, one molecule of the silicone resin 116 has a relatively lower surface free energy of the whole molecule than one molecule of the graft polymer 115.

  If the same effect as described above is obtained, the functional group with low surface free energy in the silicone resin 116 has a surface free energy equal to or lower than that of the water- and oil-repellent group 119 of the graft polymer 115. It is not necessary to limit to, and it may be comprised from the water-repellent oil-repellent group with high surface free energy. It is sufficient if the surface free energy of one molecule of the silicone resin 116 is lower than the surface free energy of one molecule of the graft polymer 115 finally.

  Since the intermolecular interaction of one graft polymer 115 relatively strengthens the intermolecular interaction of the silicone resin 116, the graft polymer 115 becomes easier to be pulled to the base film 201 side than the silicone resin 116, and the base film 201. A relatively large amount of graft polymer 116 is formed on the side in contact with the surface. As a result, even if the resin molded product is molded by in-mold molding, the water and oil repellent group 119 in the graft polymer 115 is oriented on the outermost surface of the functional layer on the resin molded product to sufficiently exhibit fingerprint resistance function. It can be done.

As an example of the graft polymer 115 having water and oil repellency, the main skeleton of the molecular structure is composed of an acrylic main chain, and one end of a side chain is bonded to the main chain, and a silicone type functional with water and oil repellency performance. Those comprising a group are mentioned. The graft polymer 115 is a graft polymer synthesized by copolymerization of a silicone macromonomer and an acrylic monomer. In addition, as a side chain, as a functional group 119 of water- and oil-repellent silicone type and another functional group 127, for example, another functional group 127 capable of partially reacting with a silane compound such as a carboxyl group or a hydroxy group is included. You may. In this case, the carboxyl group or hydroxy group may be bonded to another molecule. By constituting the main chain 126 of the graft polymer 115 with acrylic, flexibility, flexibility and the like can also be imparted. As an example of silicone resin 116, which is a thermosetting resin, in which the proportion of functional groups 129 and 130 with low surface free energy is greater than the proportion of functional groups with low surface free energy possessed by graft polymer 115 per molecule And silicone resins 116 such as fluorine-based silicone resin monomers and alkyl silicone monomers. These silicone resins 116 have fluorocarbon groups -CF ₃ , -CF _2- , hydrocarbon groups -CH ₃ , -CH _2- , silicone groups -Si (CH ₃ ) ₂ -O-, etc. It has functional groups with low surface free energy, and the proportion of those functional groups per molecule is higher than the proportion of functional groups with low surface free energy that the graft polymer 115 has.

  The functional group 119 of the graft polymer 115 used in the present invention and the functional group with low surface free energy contained in the molecule of the silicone resin 116 having the hydrolyzable functional group 128 at both ends are fluorocarbon-based fluorocarbons, It consists of functional groups such as silicone-based dimethyl silicone, trimethyl silicone, and hydrocarbon-based hydrocarbon groups. If there is a functional group with low surface free energy that can obtain the same effect as these, there is no problem with other ones.

  Further, as the silicone resin 116, it is more preferable to use one having a reactive group 128 such as a methoxy group or an ethoxy group, which reacts with hydrolysis, at both ends. When using a silicone resin that undergoes a hydrolysis reaction at one end only, there is only one site that undergoes a hydrolysis reaction when the silicone resin undergoes a hydrolysis reaction, so the crosslinking point decreases when the matrix resin cures, and the crosslink density Since the coating film hardness is low, the AR layer 111 with anti-fingerprint function is inferior in abrasion resistance. Therefore, it is preferable to use a silicone resin 116 having hydrolyzable reactive groups at both ends. In addition, there may be a reactive group which is further subjected to a hydrolysis reaction also in a portion other than both ends.

  The matrix resin that constitutes the AR layer 111 is configured to contain one or more types of the graft polymer 115 and the silicone resin 116 described above. Further, plural kinds of the graft polymer 115 and the silicone resin 116 may be simultaneously dispersed to form a matrix resin. When the ratio of the graft polymer 115 to the silicone resin 116 constituting the matrix resin is converted to 100 mass% ratio by weight ratio excluding the low refractive index fine particles 114, the water repellency of long chain having a bonding portion at one end The proportion of the graft polymer 115 having an oil repellent functional group 119 is desirably dispersed in a proportion of 5% by mass to 75% by mass, and more preferably 10% by mass to 50% by mass. When the proportion of the graft polymer 115 is less than 5% by mass, fingerprint resistance which is the performance of the functional group 119 of the water and oil repellent group on the side chain of the graft polymer 115 is hardly expressed sufficiently. In addition, when it is dispersed more than 75% by mass, the proportion of the silicone resin 116 in the matrix resin becomes small, and the film strength and the weather resistance of the AR layer with anti-fingerprint function 111 easily deteriorate. Furthermore, the graft polymer 115 with low surface free energy in the anti-fingerprint function AR layer 111 becomes dominant by increasing the proportion of the graft polymer 115. Therefore, even if the silicone resin 116 floats up on the coating surface 131, a large amount of the silicone resin 116 is also present on the back surface side of the coating surface 131, and a graft polymer oriented relatively on the back surface side of the coating surface 131 115 decreases. Since the anti-fingerprint function-added AR layer 111 is coated on the base film 201, the anti-fingerprint function-added AR layer 111 is peeled off between the base film 201 and the AR layer 111 when in-molded. Therefore, the surface of the resin molded product is the surface in contact with the base film 201 of the AR layer 111 which is the back surface to the coated surface. As a result, the proportion of the graft polymer 115 having the water / oil repellent functional group 119 being oriented on the surface of the resin molded article decreases, and as a result, the fingerprint resistance function can not be ensured. Furthermore, when the water and oil repellent functional group 119 of the graft polymer 115 is easily oriented on the coated surface 131, the coating liquid is a hydrophilic system when another layer is formed on the anti-fingerprint function AR layer 111. In the case of coating the above materials, the coating liquid is coated on the graft polymer 115, so that the coating liquid is repelled by the water and oil repellent function, and it becomes easy to form pinholes etc. and forms a uniform film. It becomes difficult. For the above reasons, the proportion of the graft polymer 115 needs to be 75% by mass or less.

  Next, by containing functional fine particles other than the low refractive index fine particles 114 as fine particles to be contained in the AR layer 111, there is no problem as a functional layer other than the function of AR. For example, by dispersing fine particles of a material having a high refractive index, such as zirconia, titanium oxide, or zinc oxide, it is possible to obtain a highly reflective, highly glossy outermost surface. In this case, for example, by adjusting the refractive index of the outermost surface in decoration application, adjusting the refractive index for high gloss and high reflection applications and changing the reflectance and reflection color, the water and liquid repellency of the decoration application It may be used as an oil-based optical function layer with anti-fingerprint function. In addition, when fingerprint resistance is required also for such functional layers by changing the types of particles and fillers to be added and using functional layers for applications such as heat control and electric control other than light, the fingerprint resistance of this embodiment is used. By using the matrix resin, it is possible to produce a transfer type functional film having a water / oil repellent fingerprint resistance function on the outermost surface. In addition, when it is desired to simultaneously impart other functions to the AR layer 111 or the other functional layer described above with + α, for example, when it is desired to additionally impart antistatic properties, the anti-fingerprint function AR layer 111 or a functional layer for other applications. The antistatic agent may be added together.

  The average film thickness of the water and oil repellent anti-fingerprint function-resistant AR layer 111 in the present embodiment is 0.05 μm to 0.17 μm, and more preferably 0.08 μm to 0.12 μm. It is desirable to be done. If the average film thickness is smaller than 0.05 μm, the reflectance on the shorter wavelength side than 380 nm as the anti-fingerprint function AR layer 111 becomes low, and a sufficient antireflection effect can not be obtained in the visible light region. On the other hand, if the thickness is greater than 0.17 μm, the reflectance at a position higher than 780 nm on the high wavelength side of the visible light region is low, and a sufficient antireflection effect in the visible light region can not be obtained. However, there is no problem if the film thickness is out of the above range depending on the required reflectance.

  Further, in the composition of the anti-fingerprint function AR layer 111, the weight ratio of the low refractive index fine particles 114 for determining the refractive index of the anti-fingerprint function AR layer to the matrix resin is 100% by mass of solid content. When hollow silica having an average particle diameter of 0.05 μm is used as the low refractive index fine particles 114, it is desirable to disperse at a ratio of 20% by mass to 90% by mass. More preferably, it is 40 mass% or more and 80 mass% or less. When the content of the low refractive index fine particles 114 is less than 20% by mass, the refractive index of the anti-fingerprint function AR layer 111 is not sufficiently lowered and the required antireflection performance is hardly obtained. In addition, when the content of low refractive index fine particles is more than 90% by mass, the mechanical strength of the film itself of the anti-fingerprint function AR layer 111 becomes weak, and a coating film strength sufficient for abrasion resistance and surface hardness can not be obtained. . When the low refractive index fine particles 114 are dispersed at the above ratio, the refractive index of the anti-fingerprint function AR layer 111 is in the range of 1.32 or more and 1.40 or less.

  In addition, as the low refractive index fine particles 114 dispersed in the anti-fingerprint function-added AR layer 111, nano-sized fillers such as sol type, spherical type, and porous type can be used. The average particle diameter of the low refractive index fine particles is preferably in the range of 0.01 μm to 0.1 μm. When the average particle diameter is smaller than 0.01 μm, it is difficult to lower the refractive index of the AR layer with fingerprint function 111, and when it is larger than 0.1 μm, the AR layer 111 is coated with a gravure coater or the like. Aggregates of the low refractive index fine particles 114 are easily generated, and appearance defects due to the aggregates are easily generated on the coated film surface on the coated film.

  Next, with regard to the optical adjustment layer 112, a layer adjusted to a refractive index as needed may be formed to have a predetermined film thickness. For example, when a layer having a refractive index higher than that of the anti-fingerprint function AR layer 111 is formed next to the anti-fingerprint function AR layer 111, fine particles of high refractive index dispersed in the optical adjustment layer 112 at this time are relatively easy The refractive index can be made higher than that of the AR layer 111 with anti-fingerprint function by using titanium oxide, zinc oxide, zirconia or the like available for the above, and a high refractive index layer is arranged next to the AR layer 111 with anti-fingerprint function. Then, after molding, the reflected light at the interface between the AR layer 111 with fingerprint resistant function and the optical adjustment layer 112 causes an interference action between the reflected light at the outermost surface and the reflected light at the outermost surface is canceled. The minimum reflectance can be reduced. As a result, it is possible to obtain a transfer-resistant AR film 110 with anti-fingerprint function with less reflection of the molded article surface after transfer. In addition, as other particles for refractive index adjustment dispersed in the optical adjustment layer 112, a sol type, a spherical type, a porous type, or the like can be used. It is desirable that an average particle diameter of fine particles for refractive index adjustment be in the range of 0.01 μm to 0.1 μm. When the average particle diameter is smaller than 0.01 μm, it is difficult to sufficiently obtain the effect of adjusting the refractive index of the optical adjustment layer 112. When the average particle diameter is larger than 0.1 μm, the optical adjustment layer 112 is coated with a gravure coater or the like. At the time, an aggregate of fine particles for refractive index adjustment is easily formed, and an appearance defect caused by the fine particles for refractive index adjustment is easily generated on the film.

  Next, in the case of providing the hard coat layer 204, it is desirable that the hard coat layer 204 be a UV curable after cure type, and that the average film thickness after drying is formed between 0.5 μm and 10 μm. If the average film thickness is less than 0.5 μm, sufficient hardness after molding can not be obtained. On the other hand, if it is larger than 10 μm, the foil breakage becomes worse at the time of in-mold molding, which causes foil burrs. However, the film thickness can be changed according to the needs even outside the range described on the left, and it is not necessary to be limited to the above range. The UV curable after cure type hard coat layer 204 used in the present embodiment means, for example, a hard coat layer of a type which is exposed to UV light and cured after in-mold molding. Therefore, at the stage of the functional film before in-mold molding, the ultraviolet-curable resin constituting the hard coat layer 204 is present in an uncured or semi-cured state which is not completely photo-cured (polymerized). For example, as the UV curable hard coat layer 204 of UV curable type, it is possible to use one which is photocured (polymerized) with a metal halide lamp after in-mold molding. In addition, even if the hard coat layer 204 is formed as a hard coat layer 204 of high refractive index or low refractive index, the refractive index of which is adjusted with that of the front and rear layers by dispersing fine particles for refractive index adjustment. good.

  Next, it is desirable that each of the primer layer 113 and the adhesive layer 205 be formed to have an average film thickness of 1 μm to 10 μm after drying. Moreover, regarding these layers, there is no problem if they are formed as a single layer or plural layers. If the average film thickness is smaller than 1 μm, sufficient adhesion between the layers can not be obtained. When the average film thickness is larger than 10 μm, it causes foil burrs. However, the film thickness may be outside the above range. For example, when it is desired to lower the reflectance in a specific wavelength region or visible light region due to optical design, etc., fine particles for refractive index adjustment are dispersed in the primer layer 113 or the adhesive layer 205 and the film thickness thinner than the above range or the above range It may be formed with a thicker film thickness and determined according to the required specifications. The same is true for the other layers.

  Further, the optical adjustment layer 112 may have a plurality of functions of the hard coat layer 204, the primer layer 113, and the adhesive layer 205. In that case, the layer following the AR layer with anti-fingerprint function 111 may be disposed at an optimum film thickness and an optimum layer, as necessary. In addition, when it is desired to impart designability, concealability and the like, a printing layer for decoration (not shown) can be appropriately formed between the primer layer 113 and the adhesive layer 205 with an appropriate thickness as needed. If necessary, the printing layer may be formed on a layer other than between the primer layer 113 and the adhesive layer 205, or the printing layer may have the function of the adhesive layer 205. The primer layer 113, the printing layer, and the adhesive layer 205 can be formed by comma coater, roll coating, gravure printing, screen printing, ink jet printing, etc. in addition to the gravure coater and the die coater. In addition, the printing layer may be formed by an appropriate method each time according to a design required such as metal deposition other than ink, sputtering, and coating.

  Next, FIG. 4 is a cross-sectional view illustrating the configuration of a coating apparatus for coating the anti-fingerprint function AR liquid in the anti-fingerprint function transfer AR film according to the embodiment of the present invention. In FIG. 4, the same components as those in FIGS. 1 to 3 and 7 to 10 will be assigned the same reference numerals and descriptions thereof will be omitted. The coating process of the AR coating solution with anti-fingerprint function at the time of manufacturing the transfer-type AR film with anti-fingerprint function of the present invention of FIG. 4 will be described.

  In the base film 210, an antistatic layer is formed on one side of a PET film. First, the PET surface side of the base film 210, on which the antistatic layer is not formed, is directly exposed on the surface is disposed as a coated surface. The coating apparatus includes the unwinding portion 120 of the base film 210 continuously supplied to coat the AR coating solution with fingerprint resistance function, and the base film 210 coated with the AR coating solution with fingerprint resistance function. The base film 210 is continuously transported in the X1 → X2 direction in FIG. In addition, the base film 210 has an antistatic layer formed on the side opposite to the PET surface in order to prevent the occurrence of wrinkles during conveyance to the base film 210 due to peeling charge during conveyance. As a method of reducing the amount of charge during transport, a fine uneven layer such as an antiblocking layer may be provided on the surface opposite to the coated surface instead of the antistatic layer to reduce the contact area between the base film 210 and the transport roller. The amount of peeling charge may be reduced. As the base film 210 other than the PET film, a plastic film or a plastic sheet made of a material such as polyacrylic, polyurethane, polyolefin, polycarbonate, triacetyl cellulose may be used.

  In the embodiment of the present invention, the case where the AR layer 111 with anti-fingerprint function is coated by a roll-to-roll coating facility and the PET film of the base film 210 uses a PET film having an average thickness of 50 μm will be described.

  The PET film of the base film 210 is coated using a gravure coater in order to apply the anti-fingerprint function AR coating solution. The coating unit is a gravure roller 122 for applying an anti-fingerprint function-attached AR coating solution on a PET surface, and a base film 210 when transferring the anti-fingerprint function AR coating solution to the base film 210 by the gravure roller 122. And a guide roller 125 provided on the opposite side to the gravure roller 122 via the base film 210. A groove with a depth of several μm to several 10 μm or less consisting of fine lines not shown is formed in a spiral on the gravure roller 122, and the AR coating solution with anti-fingerprint function is supplied into the groove. . The gravure roller 122 rotates clockwise as shown in FIG. 4 and passes through the liquid pan 124 containing the AR liquid for supplying the AR liquid to the spiral groove of the gravure roller 122. Is supplied.

  The gravure roller 122 is then fingerprint resistant before it contacts the PET surface of the base film 210 through the doctor blade 123 which plays a role of scraping the AR coating solution with anti-fingerprint function from the surface of the gravure roller 122 to a predetermined liquid volume. The AR coating solution attached remains in the groove only.

  Thereafter, when the gravure roller 122 and the PET surface of the base film 210 come in contact with each other, the AR coating liquid with anti-fingerprint function in the groove of the gravure roller 122 is transferred to the PET surface of the base film 210 and is formed on the PET surface of the base film 210. A fingerprint resistant AR coating solution is formed as a wet film. That is, the anti-fingerprint function-added AR layer 111 uniformly formed on the PET surface of the base film 210 is formed.

  As a coating method in the manufacturing process of the transfer type AR film with anti-fingerprint function of the present invention, AR coating liquid with anti-fingerprint function using any other application method such as die coat, calendar coat, roll coat other than gravure coating May be coated.

  In the next step, the anti-fingerprint function AR layer 111 coated on the PET surface of the base film 210 is transported to a thermal drying furnace 211 for drying and heat curing. As the thermal drying furnace 211, a general thermal drying process such as a hot air furnace or an infrared heater (IR) furnace or a thermal drying furnace using hot air and IR in combination may be provided. For example, the thermal drying furnace uses a hot air circulation door furnace to thermally dry and thermally cure the anti-fingerprint function AR layer 111 at 120 ° C. for 1 minute, and the average film thickness after drying is 0.1 μm with a refractive index of 1.36. The anti-fingerprint function-added AR layer 111 can be uniformly formed on the PET surface. The AR coating solution with anti-fingerprint function used at this time uses, for example, a hollow silica sol having an average particle diameter of 50 nm as the low refractive index fine particles 114, and together the graft polymer 115 and the silicone resin 116 as a binder for forming a matrix resin. It can be dispersed, hydrolyzed by adding water and nitric acid, and diluted with isopropyl alcohol to a solid content of 5%. The graft polymer 115 used at this time has a long-chain silicone-based water- and oil-repellent functional group 119 in which one end is bonded to the main chain in the side chain and another functional group 127 in the side chain. And the main chain 126 is made of acrylic. The silicone resin 116 has a fluorocarbon in the molecule as the functional group 129 having low surface free energy of the main chain in the silicone resin, and the ratio of the functional group (fluorocarbon) having low surface free energy per molecule is a graft polymer A fluorine-based compound having a methoxy group at both ends, which is a hydrolyzable functional group 128 in which one end in 115 is more than the proportion of the long-chain silicone-based water- and oil-repellent functional group 119 bonded to the main chain It is a silicone resin 116.

  After sufficient hydrolysis of the above-mentioned AR coating solution with anti-fingerprint function, an appropriate dilution solvent may be added as needed from 5% of solid content as appropriate, and the concentration may be adjusted by diluting as necessary.

  Next, the details of the heat curing process of the anti-fingerprint function AR coating solution of the present invention will be described using FIG. FIG. 5 is a view for explaining an example of the curing process of the anti-fingerprint function-added AR layer according to the embodiment of the present invention. The same reference numerals in FIG. 5 denote the same components as in FIGS. 1 to 4 and 7 to 10, and a description thereof will be omitted.

  In FIG. 5, when the AR layer with anti-fingerprint function 111 on the base film 210 first enters the thermal drying furnace after coating by the gravure coater in STEP 1 first, the coating in the anti-fingerprint function with AR layer 111 first The isopropyl alcohol of the dispersion solvent 117 in the solution evaporates. In the process, a long chain having a functional group with low surface free energy in the graft polymer 115 is a fluorine-based silicone resin 116 in which the proportion of functional groups with lower surface free energy per molecule is higher than that of the graft polymer 115 in STEP2. In the fluorine-based silicone resin 116, the intermolecular interaction is weakened. That is, the attractive force by the intermolecular force, which is an intermolecular interaction acting on the fluorine-based silicone resin 116, is weaker than the attractive force of the graft polymer 115. As a result, the fluorine-based silicone resin 116 is the inner side of the film of the anti-fingerprint function AR layer 111, that is, the base film, than the graft polymer 115 having a high surface free energy per molecule as compared to the fluorine-based silicone resin 116. Since the force to be pulled to the side 201 becomes weak, a relatively large amount of silicone resin 116 is easily formed on the back surface side which is the coated surface on the side opposite to the base film 210. On the other hand, compared with fluorine-based silicone resin 116, graft polymer 115 having a high surface free energy per molecule has stronger intermolecular interaction within the film of AR layer 111 with anti-fingerprint function, and intermolecular It is easy to be attracted by force, is attracted to the inside of the film of the anti-fingerprint AR layer 111, that is, to the base film 210 side, and tends to be formed relatively more on the base film 210 side.

  When a fluorocarbon group having low surface free energy in the fluorine-based silicone resin 116 is incorporated into the main chain as the functional group 129, the fluorocarbon group exhibits low surface tension because it has low surface free energy. Since it is smaller than the surface tension of water, it has a water and oil repellent function to water and oil. However, when a fluorocarbon is incorporated into the functional group 129 of the main chain in the silicone resin 116, the fluorocarbon itself is a functional group having low surface free energy and has water and oil repellent performance, but the fluorocarbon group in the silicone resin 116 The length of the functional group of itself is short and it is difficult to be oriented to the coated surface. Therefore, the fluorocarbon group of the fluorine-based silicone resin 116 is not sufficiently oriented in the state of being exposed on the coated surface opposite to the base film 210 of the fingerprint resistant AR layer 111, and the proportion of the fluorocarbon group exposed is relatively small. A state with high surface free energy is formed, and the water and oil repellent function is not sufficiently expressed. As a result, when another layer is formed on the anti-fingerprint AR layer 111, even if the coating liquid is a hydrophilic / lipophilic material, it is difficult to coagulate at the time of coating, and repellence, pinholes and the like do not easily occur, and it is easily uniform. It becomes easy to form a coating film. The surface is further modified by plasma treatment, corona treatment, etc. in advance on the AR layer 111 with anti-fingerprint function after curing, resulting in a coating surface with higher surface free energy, and the hydrophilic / lipophilic coating liquid is coated more It will be easy to work with.

  When a graft polymer 115 having a long-chain silicone-based water- and oil-repellent functional group 119 (see FIG. 2) having a bond at one end is used, the side extending long from the main chain not shown The silicone-based functional group of the water- and oil-repellent functional group 119 of the chain is a base film in the process where the molecular chain is separated from the main chain due to one end and the AR layer 111 with fingerprint function is cured and coated. It tends to be oriented near the side 210 PET plane. Further, the graft polymer 115 and a part of the fluorine-based silicone resin 116 form a matrrisk resin in a state where they are partially bonded to each other by a hydrolysis reaction, a hydrogen bond or the like, and form an AR layer 111 with a fingerprint resistance function. Sufficient film strength is secured.

  After this, after curing similar to the coating process of the anti-fingerprint function-added AR layer 111 described in FIG. 5, after-cure with a higher refractive index than that of the anti-fingerprint function-added AR layer 111 containing high refractive index fine particles The hard coat layer 204 (see FIG. 1) is coated with a gravure coater so that the average film thickness after drying is 4 μm, and then the refractive index is higher than that of the AR layer 111 with anti-fingerprint function, A primer layer containing high refractive index fine particles having a refractive index lower than that of the hard coat layer 204 is applied by a gravure coater so as to have an average film thickness of 0.1 μm after drying, and finally, a polycarbonate of resin for injection molding The adhesive layer 205 (see FIG. 1) that can be adhered is coated with a gravure coater so as to have an average film thickness of 2 μm after drying.

  The molded article produced using the transfer-type AR film with a fingerprint function of this invention is demonstrated using FIG. FIG. 6 is a cross-sectional view showing an example of the configuration of an AR molded article with anti-fingerprint function according to the embodiment of the present invention, and an enlarged view showing the internal configuration of the AR layer is also shown. In FIG. 6, the same components as those in FIGS. 1 to 5 and 7 to 10 will be assigned the same reference numerals and descriptions thereof will be omitted.

  The AR molded article shown in FIG. 6 is obtained by forming an AR layer with fingerprint resistant function 111 on the surface of the molded article using the transfer type AR film with fingerprint resistant function of the present invention. The molded resin layer of the molded resin layer 118 can be formed using ABS, PMMA, PC, PP resin, alloy resin of these, or the like that can be used in injection molding such as in-mold molding. The molded article surface of FIG. 6 is in a state where the anti-fingerprint function-added AR layer 111 is exposed to air. At this time, the graft polymer 115 is formed in a relatively large amount on the outermost surface side of the anti-fingerprint function AR layer 111.

  The graft polymer 115 used in the matrix resin of the anti-fingerprint function AR layer 111 according to the embodiment of the present invention has surface free energy in the silicone resin 116 one end of which is combined with the acrylic main chain 126 (see FIG. 2). In the molecule, there is a functional group of silicone type which is a low functional group 129 and a long-chain water- and oil-repellent functional group 119 (see FIG. 2) longer than 130. The functional group of a silicone based long-chain water- and oil-repellent functional group 119 having one end bonded to an acrylic main chain 126 has a molecular chain having a low surface free energy functional group 129, 130 in the silicone resin 116. It is longer than that, and can freely move within the matrix resin forming the AR layer 111 with anti-fingerprint function. The functional group of the silicone type which is a long-chain water- and oil-repellent functional group 119 having one end bonded to the acrylic main chain 126 is a functional group having low surface free energy in the graft polymer 115. It is less susceptible to intermolecular interaction than other functional groups and molecular chains linked to Therefore, a silicone-based functional group, which is a long-chain water- and oil-repellent functional group 119 having one end bonded to an acrylic main chain 126, is not relatively attracted to the inside of the film in the anti-fingerprint function AR layer 111. , It is easy to come out to the air layer side. In addition, when the molecular chain of the functional group 119 is long, the functional group 119 can move freely, and the molecular chain becomes easy to lie down, and it becomes easy to float on the air layer side. As a result, as shown in the partially enlarged view of the anti-fingerprint function-added AR layer 111, the silicone-based functional group having a long-chain water and oil repellent functional group 119 having one end bonded to the acrylic main chain 126 Water repellent and oil repellent of a long chain in which one end is bonded to the acrylic main chain 126 at the outermost surface of the molded product easily because it is easily floated from the gap of the matrix resin forming the AR layer 111 with fingerprint function to the interface with the air layer to be the outermost surface. The functional group 119 of silicone is more oriented than the functional group of silicone. Therefore, the water and oil repellent function is expressed on the outermost surface by the action of the silicone functional group which is the water and oil repellent functional group 119 in the side chain of the graft polymer 115, and the contact angle of water is 100 ° or more, for example. The anti-fingerprint function by the water repellant function can be formed simultaneously with the AR function. Further, the outermost surface of the molded article using the transfer type anti-fingerprint function with AR film of the present invention has a good water and oil repellent function, so that the finger is less likely to get stuck on the surface of the molded article even when touched by finger, Slipperiness also becomes good. As a result, even when using in-mold molding or roll transfer using a transfer-type film, it is possible to reduce the AR layer with high fingerprint resistance with high water- and oil-repellent performance and good slipperiness of the outermost surface of molded products and parts. It can be formed at cost.

  The present invention can perform in-mold formation using an AR film in which a fingerprint resistant material having a water and oil repellent function is dispersed in an AR layer, and a functional film which is transferred to the surface of a resin molded article It is useful for the manufacturing method of a film, a coating composition, and an in-mold molded article etc. which a functional film is transferred and formed.

1 · · · fixed type 2 · · · movable type 3 · · · foil feeding device 4 · · · suction hole 5 · · · gate 6 · · · resin 7 · · · molded article Fixed type 2A: movable type 1B: fixed type 2B: movable type 100: AR film 101: base film 102: AR layer 103: hard coat layer 104: Adhesive layer 105: Molded product 106: Cutter 110: Transfer type AR film 111: AR layer 112: Optical adjustment layer 113: Primer layer 114: Low refractive fine particles 115 ··· -Graft polymer 116-Silicone resin 117-Dispersion solvent 118-Molded resin layer 119-Water- and oil-repellent functional group 120-Unrolling part 121-Winding part 122-- Gravure roller 23 ··· Doctor blade 124 ··· Liquid pan 125 ··· Guide roller 126 ··· Main chain 127 ··· Functional group 128 ··· Hydrolysis reactive group 129 ··· Functional group 130 ··· Functional group 131 ... coated surface 201 ... base film 202 ... peeling layer 203 ... AR layer 204 ... hard coat layer 205 ... adhesive layer 210 ... base film 211 ... thermal drying furnace 301 ··· AR film 302 · · · Carrier layer 303 · · · Transfer layer

Claims (7)

Base film,
At least a functional layer formed in contact with the base film,
The functional layer is
Functional particles,
One or more kinds of graft polymers in which water and oil repellent functional groups having water and oil repellency are bonded to a main chain,
The water repellency per molecule of the graft polymer, having one or more resins having one or more types of first functional groups whose surface free energy is lower than that of the water- and oil-repellent functional groups The proportion of the oil-repellent functional group is lower than the proportion of the first functional group in one molecule of each of the resins, and the graft polymer is larger than the resin on the side of the functional layer in contact with the base film. A functional film characterized in that when it is oriented and transferred to a resin molded product, the surface of the functional layer in contact with the base film is exposed.   The functional film according to claim 1, wherein the resin is a silane compound, and has a hydrolytic reaction group at both ends.   The functional film according to claim 1 or 2, wherein the graft polymer further has a second functional group capable of partially reacting with a silane compound in the molecule. 4. The water- and oil-repellent functional group and the functional group contained in the molecule of the resin are any of fluorine- based, silicone-based and hydrocarbon-based functional groups. The functional film according to any one of the items.   The functional film according to any one of claims 1 to 4, wherein the functional particle is a particle whose refractive index can be adjusted.   The refractive index of the cured film of the said functional layer is 1.32 or more and 1.40 or less, The functional film of Claim 5 characterized by the above-mentioned.   The weight ratio of the weight of the graft polymer to the total weight of the graft polymer and the resin is 5% by weight or more and 75% by weight or less, according to any one of claims 1 to 6, Functional film described.

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